1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
5497 lines
149 KiB
C
5497 lines
149 KiB
C
/*****************************************************************************
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* sdla_x25.c WANPIPE(tm) Multiprotocol WAN Link Driver. X.25 module.
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*
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* Author: Nenad Corbic <ncorbic@sangoma.com>
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*
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* Copyright: (c) 1995-2001 Sangoma Technologies Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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* ============================================================================
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* Apr 03, 2001 Nenad Corbic o Fixed the rx_skb=NULL bug in x25 in rx_intr().
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* Dec 26, 2000 Nenad Corbic o Added a new polling routine, that uses
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* a kernel timer (more efficient).
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* Dec 25, 2000 Nenad Corbic o Updated for 2.4.X kernel
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* Jul 26, 2000 Nenad Corbic o Increased the local packet buffering
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* for API to 4096+header_size.
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* Jul 17, 2000 Nenad Corbic o Fixed the x25 startup bug. Enable
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* communications only after all interfaces
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* come up. HIGH SVC/PVC is used to calculate
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* the number of channels.
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* Enable protocol only after all interfaces
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* are enabled.
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* Jul 10, 2000 Nenad Corbic o Fixed the M_BIT bug.
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* Apr 25, 2000 Nenad Corbic o Pass Modem messages to the API.
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* Disable idle timeout in X25 API.
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* Apr 14, 2000 Nenad Corbic o Fixed: Large LCN number support.
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* Maximum LCN number is 4095.
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* Maximum number of X25 channels is 255.
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* Apr 06, 2000 Nenad Corbic o Added SMP Support.
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* Mar 29, 2000 Nenad Corbic o Added support for S514 PCI Card
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* Mar 23, 2000 Nenad Corbic o Improved task queue, BH handling.
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* Mar 14, 2000 Nenad Corbic o Updated Protocol Violation handling
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* routines. Bug Fix.
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* Mar 10, 2000 Nenad Corbic o Bug Fix: corrupted mbox recovery.
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* Mar 09, 2000 Nenad Corbic o Fixed the auto HDLC bug.
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* Mar 08, 2000 Nenad Corbic o Fixed LAPB HDLC startup problems.
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* Application must bring the link up
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* before tx/rx, and bring the
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* link down on close().
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* Mar 06, 2000 Nenad Corbic o Added an option for logging call setup
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* information.
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* Feb 29, 2000 Nenad Corbic o Added support for LAPB HDLC API
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* Feb 25, 2000 Nenad Corbic o Fixed the modem failure handling.
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* No Modem OOB message will be passed
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* to the user.
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* Feb 21, 2000 Nenad Corbic o Added Xpipemon Debug Support
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* Dec 30, 1999 Nenad Corbic o Socket based X25API
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* Sep 17, 1998 Jaspreet Singh o Updates for 2.2.X kernel
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* Mar 15, 1998 Alan Cox o 2.1.x porting
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* Dec 19, 1997 Jaspreet Singh o Added multi-channel IPX support
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* Nov 27, 1997 Jaspreet Singh o Added protection against enabling of irqs
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* when they are disabled.
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* Nov 17, 1997 Farhan Thawar o Added IPX support
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* o Changed if_send() to now buffer packets when
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* the board is busy
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* o Removed queueing of packets via the polling
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* routing
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* o Changed if_send() critical flags to properly
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* handle race conditions
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* Nov 06, 1997 Farhan Thawar o Added support for SVC timeouts
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* o Changed PVC encapsulation to ETH_P_IP
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* Jul 21, 1997 Jaspreet Singh o Fixed freeing up of buffers using kfree()
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* when packets are received.
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* Mar 11, 1997 Farhan Thawar Version 3.1.1
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* o added support for V35
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* o changed if_send() to return 0 if
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* wandev.critical() is true
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* o free socket buffer in if_send() if
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* returning 0
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* o added support for single '@' address to
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* accept all incoming calls
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* o fixed bug in set_chan_state() to disconnect
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* Jan 15, 1997 Gene Kozin Version 3.1.0
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* o implemented exec() entry point
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* Jan 07, 1997 Gene Kozin Initial version.
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*****************************************************************************/
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/*======================================================
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* Includes
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*=====================================================*/
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#include <linux/module.h>
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#include <linux/kernel.h> /* printk(), and other useful stuff */
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#include <linux/stddef.h> /* offsetof(), etc. */
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#include <linux/errno.h> /* return codes */
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#include <linux/string.h> /* inline memset(), etc. */
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#include <linux/ctype.h>
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#include <linux/slab.h> /* kmalloc(), kfree() */
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#include <linux/wanrouter.h> /* WAN router definitions */
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#include <linux/wanpipe.h> /* WANPIPE common user API definitions */
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#include <linux/workqueue.h>
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#include <asm/byteorder.h> /* htons(), etc. */
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#include <asm/atomic.h>
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#include <linux/delay.h> /* Experimental delay */
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#include <asm/uaccess.h>
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#include <linux/if.h>
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#include <linux/if_arp.h>
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#include <linux/sdla_x25.h> /* X.25 firmware API definitions */
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#include <linux/if_wanpipe_common.h>
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#include <linux/if_wanpipe.h>
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/*======================================================
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* Defines & Macros
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*=====================================================*/
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#define CMD_OK 0 /* normal firmware return code */
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#define CMD_TIMEOUT 0xFF /* firmware command timed out */
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#define MAX_CMD_RETRY 10 /* max number of firmware retries */
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#define X25_CHAN_MTU 4096 /* unfragmented logical channel MTU */
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#define X25_HRDHDR_SZ 7 /* max encapsulation header size */
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#define X25_CONCT_TMOUT (90*HZ) /* link connection timeout */
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#define X25_RECON_TMOUT (10*HZ) /* link connection timeout */
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#define CONNECT_TIMEOUT (90*HZ) /* link connection timeout */
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#define HOLD_DOWN_TIME (30*HZ) /* link hold down time */
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#define MAX_BH_BUFF 10
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#define M_BIT 0x01
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//#define PRINT_DEBUG 1
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#ifdef PRINT_DEBUG
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#define DBG_PRINTK(format, a...) printk(format, ## a)
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#else
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#define DBG_PRINTK(format, a...)
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#endif
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#define TMR_INT_ENABLED_POLL_ACTIVE 0x01
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#define TMR_INT_ENABLED_POLL_CONNECT_ON 0x02
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#define TMR_INT_ENABLED_POLL_CONNECT_OFF 0x04
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#define TMR_INT_ENABLED_POLL_DISCONNECT 0x08
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#define TMR_INT_ENABLED_CMD_EXEC 0x10
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#define TMR_INT_ENABLED_UPDATE 0x20
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#define TMR_INT_ENABLED_UDP_PKT 0x40
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#define MAX_X25_ADDR_SIZE 16
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#define MAX_X25_DATA_SIZE 129
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#define MAX_X25_FACL_SIZE 110
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#define TRY_CMD_AGAIN 2
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#define DELAY_RESULT 1
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#define RETURN_RESULT 0
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#define DCD(x) (x & 0x03 ? "HIGH" : "LOW")
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#define CTS(x) (x & 0x05 ? "HIGH" : "LOW")
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/* Driver will not write log messages about
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* modem status if defined.*/
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#define MODEM_NOT_LOG 1
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/*====================================================
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* For IPXWAN
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*===================================================*/
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#define CVHexToAscii(b) (((unsigned char)(b) > (unsigned char)9) ? ((unsigned char)'A' + ((unsigned char)(b) - (unsigned char)10)) : ((unsigned char)'0' + (unsigned char)(b)))
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/*====================================================
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* MEMORY DEBUGGING FUNCTION
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*====================================================
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#define KMEM_SAFETYZONE 8
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static void * dbg_kmalloc(unsigned int size, int prio, int line) {
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int i = 0;
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void * v = kmalloc(size+sizeof(unsigned int)+2*KMEM_SAFETYZONE*8,prio);
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char * c1 = v;
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c1 += sizeof(unsigned int);
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*((unsigned int *)v) = size;
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for (i = 0; i < KMEM_SAFETYZONE; i++) {
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c1[0] = 'D'; c1[1] = 'E'; c1[2] = 'A'; c1[3] = 'D';
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c1[4] = 'B'; c1[5] = 'E'; c1[6] = 'E'; c1[7] = 'F';
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c1 += 8;
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}
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c1 += size;
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for (i = 0; i < KMEM_SAFETYZONE; i++) {
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c1[0] = 'M'; c1[1] = 'U'; c1[2] = 'N'; c1[3] = 'G';
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c1[4] = 'W'; c1[5] = 'A'; c1[6] = 'L'; c1[7] = 'L';
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c1 += 8;
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}
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v = ((char *)v) + sizeof(unsigned int) + KMEM_SAFETYZONE*8;
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printk(KERN_INFO "line %d kmalloc(%d,%d) = %p\n",line,size,prio,v);
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return v;
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}
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static void dbg_kfree(void * v, int line) {
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unsigned int * sp = (unsigned int *)(((char *)v) - (sizeof(unsigned int) + KMEM_SAFETYZONE*8));
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unsigned int size = *sp;
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char * c1 = ((char *)v) - KMEM_SAFETYZONE*8;
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int i = 0;
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for (i = 0; i < KMEM_SAFETYZONE; i++) {
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if ( c1[0] != 'D' || c1[1] != 'E' || c1[2] != 'A' || c1[3] != 'D'
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|| c1[4] != 'B' || c1[5] != 'E' || c1[6] != 'E' || c1[7] != 'F') {
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printk(KERN_INFO "kmalloced block at %p has been corrupted (underrun)!\n",v);
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printk(KERN_INFO " %4x: %2x %2x %2x %2x %2x %2x %2x %2x\n", i*8,
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c1[0],c1[1],c1[2],c1[3],c1[4],c1[5],c1[6],c1[7] );
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}
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c1 += 8;
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}
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c1 += size;
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for (i = 0; i < KMEM_SAFETYZONE; i++) {
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if ( c1[0] != 'M' || c1[1] != 'U' || c1[2] != 'N' || c1[3] != 'G'
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|| c1[4] != 'W' || c1[5] != 'A' || c1[6] != 'L' || c1[7] != 'L'
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) {
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printk(KERN_INFO "kmalloced block at %p has been corrupted (overrun):\n",v);
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printk(KERN_INFO " %4x: %2x %2x %2x %2x %2x %2x %2x %2x\n", i*8,
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c1[0],c1[1],c1[2],c1[3],c1[4],c1[5],c1[6],c1[7] );
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}
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c1 += 8;
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}
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printk(KERN_INFO "line %d kfree(%p)\n",line,v);
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v = ((char *)v) - (sizeof(unsigned int) + KMEM_SAFETYZONE*8);
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kfree(v);
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}
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#define kmalloc(x,y) dbg_kmalloc(x,y,__LINE__)
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#define kfree(x) dbg_kfree(x,__LINE__)
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==============================================================*/
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/*===============================================
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* Data Structures
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*===============================================*/
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/*========================================================
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* Name: x25_channel
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*
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* Purpose: To hold private informaton for each
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* logical channel.
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*
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* Rationale: Per-channel debugging is possible if each
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* channel has its own private area.
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*
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* Assumptions:
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*
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* Description: This is an extention of the struct net_device
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* we create for each network interface to keep
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* the rest of X.25 channel-specific data.
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*
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* Construct: Typedef
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*/
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typedef struct x25_channel
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{
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wanpipe_common_t common; /* common area for x25api and socket */
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char name[WAN_IFNAME_SZ+1]; /* interface name, ASCIIZ */
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char addr[WAN_ADDRESS_SZ+1]; /* media address, ASCIIZ */
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unsigned tx_pkt_size;
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unsigned short protocol; /* ethertype, 0 - multiplexed */
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char drop_sequence; /* mark sequence for dropping */
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unsigned long state_tick; /* time of the last state change */
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unsigned idle_timeout; /* sec, before disconnecting */
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unsigned long i_timeout_sofar; /* # of sec's we've been idle */
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unsigned hold_timeout; /* sec, before re-connecting */
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unsigned long tick_counter; /* counter for transmit time out */
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char devtint; /* Weather we should dev_tint() */
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struct sk_buff* rx_skb; /* receive socket buffer */
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struct sk_buff* tx_skb; /* transmit socket buffer */
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bh_data_t *bh_head; /* Circular buffer for x25api_bh */
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unsigned long tq_working;
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volatile int bh_write;
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volatile int bh_read;
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atomic_t bh_buff_used;
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sdla_t* card; /* -> owner */
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struct net_device *dev; /* -> bound devce */
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int ch_idx;
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unsigned char enable_IPX;
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unsigned long network_number;
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struct net_device_stats ifstats; /* interface statistics */
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unsigned short transmit_length;
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unsigned short tx_offset;
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char transmit_buffer[X25_CHAN_MTU+sizeof(x25api_hdr_t)];
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if_send_stat_t if_send_stat;
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rx_intr_stat_t rx_intr_stat;
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pipe_mgmt_stat_t pipe_mgmt_stat;
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unsigned long router_start_time; /* Router start time in seconds */
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unsigned long router_up_time;
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} x25_channel_t;
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/* FIXME Take this out */
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#ifdef NEX_OLD_CALL_INFO
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typedef struct x25_call_info
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{
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char dest[17]; PACKED;/* ASCIIZ destination address */
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char src[17]; PACKED;/* ASCIIZ source address */
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char nuser; PACKED;/* number of user data bytes */
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unsigned char user[127]; PACKED;/* user data */
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char nfacil; PACKED;/* number of facilities */
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struct
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{
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unsigned char code; PACKED;
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unsigned char parm; PACKED;
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} facil[64]; /* facilities */
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} x25_call_info_t;
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#else
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typedef struct x25_call_info
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{
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char dest[MAX_X25_ADDR_SIZE] PACKED;/* ASCIIZ destination address */
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char src[MAX_X25_ADDR_SIZE] PACKED;/* ASCIIZ source address */
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unsigned char nuser PACKED;
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unsigned char user[MAX_X25_DATA_SIZE] PACKED;/* user data */
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unsigned char nfacil PACKED;
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unsigned char facil[MAX_X25_FACL_SIZE] PACKED;
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unsigned short lcn PACKED;
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} x25_call_info_t;
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#endif
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/*===============================================
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* Private Function Prototypes
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*==============================================*/
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/*=================================================
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* WAN link driver entry points. These are
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* called by the WAN router module.
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*/
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static int update(struct wan_device* wandev);
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static int new_if(struct wan_device* wandev, struct net_device* dev,
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wanif_conf_t* conf);
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static int del_if(struct wan_device* wandev, struct net_device* dev);
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static void disable_comm (sdla_t* card);
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static void disable_comm_shutdown(sdla_t *card);
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/*=================================================
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* WANPIPE-specific entry points
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*/
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static int wpx_exec (struct sdla* card, void* u_cmd, void* u_data);
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static void x25api_bh(struct net_device *dev);
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static int x25api_bh_cleanup(struct net_device *dev);
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static int bh_enqueue(struct net_device *dev, struct sk_buff *skb);
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/*=================================================
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* Network device interface
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*/
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static int if_init(struct net_device* dev);
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static int if_open(struct net_device* dev);
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static int if_close(struct net_device* dev);
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static int if_header(struct sk_buff* skb, struct net_device* dev,
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unsigned short type, void* daddr, void* saddr, unsigned len);
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static int if_rebuild_hdr (struct sk_buff* skb);
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static int if_send(struct sk_buff* skb, struct net_device* dev);
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static struct net_device_stats *if_stats(struct net_device* dev);
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static void if_tx_timeout(struct net_device *dev);
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/*=================================================
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* Interrupt handlers
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*/
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static void wpx_isr (sdla_t *);
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static void rx_intr (sdla_t *);
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static void tx_intr (sdla_t *);
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static void status_intr (sdla_t *);
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static void event_intr (sdla_t *);
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static void spur_intr (sdla_t *);
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static void timer_intr (sdla_t *);
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static int tx_intr_send(sdla_t *card, struct net_device *dev);
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static struct net_device *move_dev_to_next(sdla_t *card,
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struct net_device *dev);
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/*=================================================
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* Background polling routines
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*/
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static void wpx_poll (sdla_t* card);
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static void poll_disconnected (sdla_t* card);
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static void poll_connecting (sdla_t* card);
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static void poll_active (sdla_t* card);
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static void trigger_x25_poll(sdla_t *card);
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static void x25_timer_routine(unsigned long data);
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/*=================================================
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* X.25 firmware interface functions
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*/
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static int x25_get_version (sdla_t* card, char* str);
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static int x25_configure (sdla_t* card, TX25Config* conf);
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static int hdlc_configure (sdla_t* card, TX25Config* conf);
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static int set_hdlc_level (sdla_t* card);
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static int x25_get_err_stats (sdla_t* card);
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static int x25_get_stats (sdla_t* card);
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static int x25_set_intr_mode (sdla_t* card, int mode);
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static int x25_close_hdlc (sdla_t* card);
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static int x25_open_hdlc (sdla_t* card);
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static int x25_setup_hdlc (sdla_t* card);
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static int x25_set_dtr (sdla_t* card, int dtr);
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static int x25_get_chan_conf (sdla_t* card, x25_channel_t* chan);
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static int x25_place_call (sdla_t* card, x25_channel_t* chan);
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static int x25_accept_call (sdla_t* card, int lcn, int qdm);
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static int x25_clear_call (sdla_t* card, int lcn, int cause, int diagn);
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static int x25_send (sdla_t* card, int lcn, int qdm, int len, void* buf);
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static int x25_fetch_events (sdla_t* card);
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static int x25_error (sdla_t* card, int err, int cmd, int lcn);
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/*=================================================
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* X.25 asynchronous event handlers
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*/
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static int incoming_call (sdla_t* card, int cmd, int lcn, TX25Mbox* mb);
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static int call_accepted (sdla_t* card, int cmd, int lcn, TX25Mbox* mb);
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static int call_cleared (sdla_t* card, int cmd, int lcn, TX25Mbox* mb);
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static int timeout_event (sdla_t* card, int cmd, int lcn, TX25Mbox* mb);
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static int restart_event (sdla_t* card, int cmd, int lcn, TX25Mbox* mb);
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/*=================================================
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* Miscellaneous functions
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*/
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static int connect (sdla_t* card);
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static int disconnect (sdla_t* card);
|
|
static struct net_device* get_dev_by_lcn(struct wan_device* wandev,
|
|
unsigned lcn);
|
|
static int chan_connect(struct net_device* dev);
|
|
static int chan_disc(struct net_device* dev);
|
|
static void set_chan_state(struct net_device* dev, int state);
|
|
static int chan_send(struct net_device *dev, void* buff, unsigned data_len,
|
|
unsigned char tx_intr);
|
|
static unsigned char bps_to_speed_code (unsigned long bps);
|
|
static unsigned int dec_to_uint (unsigned char* str, int len);
|
|
static unsigned int hex_to_uint (unsigned char*, int);
|
|
static void parse_call_info (unsigned char*, x25_call_info_t*);
|
|
static struct net_device *find_channel(sdla_t *card, unsigned lcn);
|
|
static void bind_lcn_to_dev(sdla_t *card, struct net_device *dev, unsigned lcn);
|
|
static void setup_for_delayed_transmit(struct net_device *dev,
|
|
void *buf, unsigned len);
|
|
|
|
|
|
/*=================================================
|
|
* X25 API Functions
|
|
*/
|
|
static int wanpipe_pull_data_in_skb(sdla_t *card, struct net_device *dev,
|
|
struct sk_buff **);
|
|
static void timer_intr_exec(sdla_t *, unsigned char);
|
|
static int execute_delayed_cmd(sdla_t *card, struct net_device *dev,
|
|
mbox_cmd_t *usr_cmd, char bad_cmd);
|
|
static int api_incoming_call (sdla_t*, TX25Mbox *, int);
|
|
static int alloc_and_init_skb_buf (sdla_t *,struct sk_buff **, int);
|
|
static void send_delayed_cmd_result(sdla_t *card, struct net_device *dev,
|
|
TX25Mbox* mbox);
|
|
static int clear_confirm_event (sdla_t *, TX25Mbox*);
|
|
static void send_oob_msg (sdla_t *card, struct net_device *dev, TX25Mbox *mbox);
|
|
static int timer_intr_cmd_exec(sdla_t *card);
|
|
static void api_oob_event (sdla_t *card,TX25Mbox *mbox);
|
|
static int check_bad_command(sdla_t *card, struct net_device *dev);
|
|
static int channel_disconnect(sdla_t* card, struct net_device *dev);
|
|
static void hdlc_link_down (sdla_t*);
|
|
|
|
/*=================================================
|
|
* XPIPEMON Functions
|
|
*/
|
|
static int process_udp_mgmt_pkt(sdla_t *);
|
|
static int udp_pkt_type( struct sk_buff *, sdla_t*);
|
|
static int reply_udp( unsigned char *, unsigned int);
|
|
static void init_x25_channel_struct( x25_channel_t *);
|
|
static void init_global_statistics( sdla_t *);
|
|
static int store_udp_mgmt_pkt(int udp_type, char udp_pkt_src, sdla_t *card,
|
|
struct net_device *dev,
|
|
struct sk_buff *skb, int lcn);
|
|
static unsigned short calc_checksum (char *, int);
|
|
|
|
|
|
|
|
/*=================================================
|
|
* IPX functions
|
|
*/
|
|
static void switch_net_numbers(unsigned char *, unsigned long, unsigned char);
|
|
static int handle_IPXWAN(unsigned char *, char *, unsigned char ,
|
|
unsigned long , unsigned short );
|
|
|
|
extern void disable_irq(unsigned int);
|
|
extern void enable_irq(unsigned int);
|
|
|
|
static void S508_S514_lock(sdla_t *, unsigned long *);
|
|
static void S508_S514_unlock(sdla_t *, unsigned long *);
|
|
|
|
|
|
/*=================================================
|
|
* Global Variables
|
|
*=================================================*/
|
|
|
|
|
|
|
|
/*=================================================
|
|
* Public Functions
|
|
*=================================================*/
|
|
|
|
|
|
|
|
|
|
/*===================================================================
|
|
* wpx_init: X.25 Protocol Initialization routine.
|
|
*
|
|
* Purpose: To initialize the protocol/firmware.
|
|
*
|
|
* Rationale: This function is called by setup() function, in
|
|
* sdlamain.c, to dynamically setup the x25 protocol.
|
|
* This is the first protocol specific function, which
|
|
* executes once on startup.
|
|
*
|
|
* Description: This procedure initializes the x25 firmware and
|
|
* sets up the mailbox, transmit and receive buffer
|
|
* pointers. It also initializes all debugging structures
|
|
* and sets up the X25 environment.
|
|
*
|
|
* Sets up hardware options defined by user in [wanpipe#]
|
|
* section of wanpipe#.conf configuration file.
|
|
*
|
|
* At this point adapter is completely initialized
|
|
* and X.25 firmware is running.
|
|
* o read firmware version (to make sure it's alive)
|
|
* o configure adapter
|
|
* o initialize protocol-specific fields of the
|
|
* adapter data space.
|
|
*
|
|
* Called by: setup() function in sdlamain.c
|
|
*
|
|
* Assumptions: None
|
|
*
|
|
* Warnings: None
|
|
*
|
|
* Return: 0 o.k.
|
|
* < 0 failure.
|
|
*/
|
|
|
|
int wpx_init (sdla_t* card, wandev_conf_t* conf)
|
|
{
|
|
union{
|
|
char str[80];
|
|
TX25Config cfg;
|
|
} u;
|
|
|
|
/* Verify configuration ID */
|
|
if (conf->config_id != WANCONFIG_X25){
|
|
printk(KERN_INFO "%s: invalid configuration ID %u!\n",
|
|
card->devname, conf->config_id)
|
|
;
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Initialize protocol-specific fields */
|
|
card->mbox = (void*)(card->hw.dpmbase + X25_MBOX_OFFS);
|
|
card->rxmb = (void*)(card->hw.dpmbase + X25_RXMBOX_OFFS);
|
|
card->flags = (void*)(card->hw.dpmbase + X25_STATUS_OFFS);
|
|
|
|
/* Initialize for S514 Card */
|
|
if(card->hw.type == SDLA_S514) {
|
|
card->mbox += X25_MB_VECTOR;
|
|
card->flags += X25_MB_VECTOR;
|
|
card->rxmb += X25_MB_VECTOR;
|
|
}
|
|
|
|
|
|
/* Read firmware version. Note that when adapter initializes, it
|
|
* clears the mailbox, so it may appear that the first command was
|
|
* executed successfully when in fact it was merely erased. To work
|
|
* around this, we execute the first command twice.
|
|
*/
|
|
if (x25_get_version(card, NULL) || x25_get_version(card, u.str))
|
|
return -EIO;
|
|
|
|
|
|
/* X25 firmware can run ether in X25 or LAPB HDLC mode.
|
|
* Check the user defined option and configure accordingly */
|
|
if (conf->u.x25.LAPB_hdlc_only == WANOPT_YES){
|
|
if (set_hdlc_level(card) != CMD_OK){
|
|
return -EIO;
|
|
}else{
|
|
printk(KERN_INFO "%s: running LAP_B HDLC firmware v%s\n",
|
|
card->devname, u.str);
|
|
}
|
|
card->u.x.LAPB_hdlc = 1;
|
|
}else{
|
|
printk(KERN_INFO "%s: running X.25 firmware v%s\n",
|
|
card->devname, u.str);
|
|
card->u.x.LAPB_hdlc = 0;
|
|
}
|
|
|
|
/* Configure adapter. Here we set resonable defaults, then parse
|
|
* device configuration structure and set configuration options.
|
|
* Most configuration options are verified and corrected (if
|
|
* necessary) since we can't rely on the adapter to do so.
|
|
*/
|
|
memset(&u.cfg, 0, sizeof(u.cfg));
|
|
u.cfg.t1 = 3;
|
|
u.cfg.n2 = 10;
|
|
u.cfg.autoHdlc = 1; /* automatic HDLC connection */
|
|
u.cfg.hdlcWindow = 7;
|
|
u.cfg.pktWindow = 2;
|
|
u.cfg.station = 1; /* DTE */
|
|
u.cfg.options = 0x0090; /* disable D-bit pragmatics */
|
|
u.cfg.ccittCompat = 1988;
|
|
u.cfg.t10t20 = 30;
|
|
u.cfg.t11t21 = 30;
|
|
u.cfg.t12t22 = 30;
|
|
u.cfg.t13t23 = 30;
|
|
u.cfg.t16t26 = 30;
|
|
u.cfg.t28 = 30;
|
|
u.cfg.r10r20 = 5;
|
|
u.cfg.r12r22 = 5;
|
|
u.cfg.r13r23 = 5;
|
|
u.cfg.responseOpt = 1; /* RR's after every packet */
|
|
|
|
if (card->u.x.LAPB_hdlc){
|
|
u.cfg.hdlcMTU = 1027;
|
|
}
|
|
|
|
if (conf->u.x25.x25_conf_opt){
|
|
u.cfg.options = conf->u.x25.x25_conf_opt;
|
|
}
|
|
|
|
if (conf->clocking != WANOPT_EXTERNAL)
|
|
u.cfg.baudRate = bps_to_speed_code(conf->bps);
|
|
|
|
if (conf->station != WANOPT_DTE){
|
|
u.cfg.station = 0; /* DCE mode */
|
|
}
|
|
|
|
if (conf->interface != WANOPT_RS232 ){
|
|
u.cfg.hdlcOptions |= 0x80; /* V35 mode */
|
|
}
|
|
|
|
/* adjust MTU */
|
|
if (!conf->mtu || (conf->mtu >= 1024))
|
|
card->wandev.mtu = 1024;
|
|
else if (conf->mtu >= 512)
|
|
card->wandev.mtu = 512;
|
|
else if (conf->mtu >= 256)
|
|
card->wandev.mtu = 256;
|
|
else if (conf->mtu >= 128)
|
|
card->wandev.mtu = 128;
|
|
else
|
|
card->wandev.mtu = 64;
|
|
|
|
u.cfg.defPktSize = u.cfg.pktMTU = card->wandev.mtu;
|
|
|
|
if (conf->u.x25.hi_pvc){
|
|
card->u.x.hi_pvc = min_t(unsigned int, conf->u.x25.hi_pvc, MAX_LCN_NUM);
|
|
card->u.x.lo_pvc = min_t(unsigned int, conf->u.x25.lo_pvc, card->u.x.hi_pvc);
|
|
}
|
|
|
|
if (conf->u.x25.hi_svc){
|
|
card->u.x.hi_svc = min_t(unsigned int, conf->u.x25.hi_svc, MAX_LCN_NUM);
|
|
card->u.x.lo_svc = min_t(unsigned int, conf->u.x25.lo_svc, card->u.x.hi_svc);
|
|
}
|
|
|
|
/* Figure out the total number of channels to configure */
|
|
card->u.x.num_of_ch = 0;
|
|
if (card->u.x.hi_svc != 0){
|
|
card->u.x.num_of_ch = (card->u.x.hi_svc - card->u.x.lo_svc) + 1;
|
|
}
|
|
if (card->u.x.hi_pvc != 0){
|
|
card->u.x.num_of_ch += (card->u.x.hi_pvc - card->u.x.lo_pvc) + 1;
|
|
}
|
|
|
|
if (card->u.x.num_of_ch == 0){
|
|
printk(KERN_INFO "%s: ERROR, Minimum number of PVC/SVC channels is 1 !\n"
|
|
"%s: Please set the Lowest/Highest PVC/SVC values !\n",
|
|
card->devname,card->devname);
|
|
return -ECHRNG;
|
|
}
|
|
|
|
u.cfg.loPVC = card->u.x.lo_pvc;
|
|
u.cfg.hiPVC = card->u.x.hi_pvc;
|
|
u.cfg.loTwoWaySVC = card->u.x.lo_svc;
|
|
u.cfg.hiTwoWaySVC = card->u.x.hi_svc;
|
|
|
|
if (conf->u.x25.hdlc_window)
|
|
u.cfg.hdlcWindow = min_t(unsigned int, conf->u.x25.hdlc_window, 7);
|
|
if (conf->u.x25.pkt_window)
|
|
u.cfg.pktWindow = min_t(unsigned int, conf->u.x25.pkt_window, 7);
|
|
|
|
if (conf->u.x25.t1)
|
|
u.cfg.t1 = min_t(unsigned int, conf->u.x25.t1, 30);
|
|
if (conf->u.x25.t2)
|
|
u.cfg.t2 = min_t(unsigned int, conf->u.x25.t2, 29);
|
|
if (conf->u.x25.t4)
|
|
u.cfg.t4 = min_t(unsigned int, conf->u.x25.t4, 240);
|
|
if (conf->u.x25.n2)
|
|
u.cfg.n2 = min_t(unsigned int, conf->u.x25.n2, 30);
|
|
|
|
if (conf->u.x25.t10_t20)
|
|
u.cfg.t10t20 = min_t(unsigned int, conf->u.x25.t10_t20,255);
|
|
if (conf->u.x25.t11_t21)
|
|
u.cfg.t11t21 = min_t(unsigned int, conf->u.x25.t11_t21,255);
|
|
if (conf->u.x25.t12_t22)
|
|
u.cfg.t12t22 = min_t(unsigned int, conf->u.x25.t12_t22,255);
|
|
if (conf->u.x25.t13_t23)
|
|
u.cfg.t13t23 = min_t(unsigned int, conf->u.x25.t13_t23,255);
|
|
if (conf->u.x25.t16_t26)
|
|
u.cfg.t16t26 = min_t(unsigned int, conf->u.x25.t16_t26, 255);
|
|
if (conf->u.x25.t28)
|
|
u.cfg.t28 = min_t(unsigned int, conf->u.x25.t28, 255);
|
|
|
|
if (conf->u.x25.r10_r20)
|
|
u.cfg.r10r20 = min_t(unsigned int, conf->u.x25.r10_r20,250);
|
|
if (conf->u.x25.r12_r22)
|
|
u.cfg.r12r22 = min_t(unsigned int, conf->u.x25.r12_r22,250);
|
|
if (conf->u.x25.r13_r23)
|
|
u.cfg.r13r23 = min_t(unsigned int, conf->u.x25.r13_r23,250);
|
|
|
|
|
|
if (conf->u.x25.ccitt_compat)
|
|
u.cfg.ccittCompat = conf->u.x25.ccitt_compat;
|
|
|
|
/* initialize adapter */
|
|
if (card->u.x.LAPB_hdlc){
|
|
if (hdlc_configure(card, &u.cfg) != CMD_OK)
|
|
return -EIO;
|
|
}else{
|
|
if (x25_configure(card, &u.cfg) != CMD_OK)
|
|
return -EIO;
|
|
}
|
|
|
|
if ((x25_close_hdlc(card) != CMD_OK) || /* close HDLC link */
|
|
(x25_set_dtr(card, 0) != CMD_OK)) /* drop DTR */
|
|
return -EIO;
|
|
|
|
/* Initialize protocol-specific fields of adapter data space */
|
|
card->wandev.bps = conf->bps;
|
|
card->wandev.interface = conf->interface;
|
|
card->wandev.clocking = conf->clocking;
|
|
card->wandev.station = conf->station;
|
|
card->isr = &wpx_isr;
|
|
card->poll = NULL; //&wpx_poll;
|
|
card->disable_comm = &disable_comm;
|
|
card->exec = &wpx_exec;
|
|
card->wandev.update = &update;
|
|
card->wandev.new_if = &new_if;
|
|
card->wandev.del_if = &del_if;
|
|
|
|
/* WARNING: This function cannot exit with an error
|
|
* after the change of state */
|
|
card->wandev.state = WAN_DISCONNECTED;
|
|
|
|
card->wandev.enable_tx_int = 0;
|
|
card->irq_dis_if_send_count = 0;
|
|
card->irq_dis_poll_count = 0;
|
|
card->u.x.tx_dev = NULL;
|
|
card->u.x.no_dev = 0;
|
|
|
|
|
|
/* Configure for S514 PCI Card */
|
|
if (card->hw.type == SDLA_S514) {
|
|
card->u.x.hdlc_buf_status =
|
|
(volatile unsigned char *)
|
|
(card->hw.dpmbase + X25_MB_VECTOR+ X25_MISC_HDLC_BITS);
|
|
}else{
|
|
card->u.x.hdlc_buf_status =
|
|
(volatile unsigned char *)(card->hw.dpmbase + X25_MISC_HDLC_BITS);
|
|
}
|
|
|
|
card->u.x.poll_device=NULL;
|
|
card->wandev.udp_port = conf->udp_port;
|
|
|
|
/* Enable or disable call setup logging */
|
|
if (conf->u.x25.logging == WANOPT_YES){
|
|
printk(KERN_INFO "%s: Enabling Call Logging.\n",
|
|
card->devname);
|
|
card->u.x.logging = 1;
|
|
}else{
|
|
card->u.x.logging = 0;
|
|
}
|
|
|
|
/* Enable or disable modem status reporting */
|
|
if (conf->u.x25.oob_on_modem == WANOPT_YES){
|
|
printk(KERN_INFO "%s: Enabling OOB on Modem change.\n",
|
|
card->devname);
|
|
card->u.x.oob_on_modem = 1;
|
|
}else{
|
|
card->u.x.oob_on_modem = 0;
|
|
}
|
|
|
|
init_global_statistics(card);
|
|
|
|
INIT_WORK(&card->u.x.x25_poll_work, (void *)wpx_poll, card);
|
|
|
|
init_timer(&card->u.x.x25_timer);
|
|
card->u.x.x25_timer.data = (unsigned long)card;
|
|
card->u.x.x25_timer.function = x25_timer_routine;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*=========================================================
|
|
* WAN Device Driver Entry Points
|
|
*========================================================*/
|
|
|
|
/*============================================================
|
|
* Name: update(), Update device status & statistics.
|
|
*
|
|
* Purpose: To provide debugging and statitical
|
|
* information to the /proc file system.
|
|
* /proc/net/wanrouter/wanpipe#
|
|
*
|
|
* Rationale: The /proc file system is used to collect
|
|
* information about the kernel and drivers.
|
|
* Using the /proc file system the user
|
|
* can see exactly what the sangoma drivers are
|
|
* doing. And in what state they are in.
|
|
*
|
|
* Description: Collect all driver statistical information
|
|
* and pass it to the top laywer.
|
|
*
|
|
* Since we have to execute a debugging command,
|
|
* to obtain firmware statitics, we trigger a
|
|
* UPDATE function within the timer interrtup.
|
|
* We wait until the timer update is complete.
|
|
* Once complete return the appropriate return
|
|
* code to indicate that the update was successful.
|
|
*
|
|
* Called by: device_stat() in wanmain.c
|
|
*
|
|
* Assumptions:
|
|
*
|
|
* Warnings: This function will degrade the performance
|
|
* of the router, since it uses the mailbox.
|
|
*
|
|
* Return: 0 OK
|
|
* <0 Failed (or busy).
|
|
*/
|
|
|
|
static int update(struct wan_device* wandev)
|
|
{
|
|
volatile sdla_t* card;
|
|
TX25Status* status;
|
|
unsigned long timeout;
|
|
|
|
/* sanity checks */
|
|
if ((wandev == NULL) || (wandev->private == NULL))
|
|
return -EFAULT;
|
|
|
|
if (wandev->state == WAN_UNCONFIGURED)
|
|
return -ENODEV;
|
|
|
|
if (test_bit(SEND_CRIT, (void*)&wandev->critical))
|
|
return -EAGAIN;
|
|
|
|
if (!wandev->dev)
|
|
return -ENODEV;
|
|
|
|
card = wandev->private;
|
|
status = card->flags;
|
|
|
|
card->u.x.timer_int_enabled |= TMR_INT_ENABLED_UPDATE;
|
|
status->imask |= INTR_ON_TIMER;
|
|
timeout = jiffies;
|
|
|
|
for (;;){
|
|
if (!(card->u.x.timer_int_enabled & TMR_INT_ENABLED_UPDATE)){
|
|
break;
|
|
}
|
|
if ((jiffies-timeout) > 1*HZ){
|
|
card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_UPDATE;
|
|
return -EAGAIN;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*===================================================================
|
|
* Name: new_if
|
|
*
|
|
* Purpose: To allocate and initialize resources for a
|
|
* new logical channel.
|
|
*
|
|
* Rationale: A new channel can be added dynamically via
|
|
* ioctl call.
|
|
*
|
|
* Description: Allocate a private channel structure, x25_channel_t.
|
|
* Parse the user interface options from wanpipe#.conf
|
|
* configuration file.
|
|
* Bind the private are into the network device private
|
|
* area pointer (dev->priv).
|
|
* Prepare the network device structure for registration.
|
|
*
|
|
* Called by: ROUTER_IFNEW Ioctl call, from wanrouter_ioctl()
|
|
* (wanmain.c)
|
|
*
|
|
* Assumptions: None
|
|
*
|
|
* Warnings: None
|
|
*
|
|
* Return: 0 Ok
|
|
* <0 Failed (channel will not be created)
|
|
*/
|
|
static int new_if(struct wan_device* wandev, struct net_device* dev,
|
|
wanif_conf_t* conf)
|
|
{
|
|
sdla_t* card = wandev->private;
|
|
x25_channel_t* chan;
|
|
int err = 0;
|
|
|
|
if ((conf->name[0] == '\0') || (strlen(conf->name) > WAN_IFNAME_SZ)){
|
|
printk(KERN_INFO "%s: invalid interface name!\n",
|
|
card->devname);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if(card->wandev.new_if_cnt++ > 0 && card->u.x.LAPB_hdlc) {
|
|
printk(KERN_INFO "%s: Error: Running LAPB HDLC Mode !\n",
|
|
card->devname);
|
|
printk(KERN_INFO
|
|
"%s: Maximum number of network interfaces must be one !\n",
|
|
card->devname);
|
|
return -EEXIST;
|
|
}
|
|
|
|
/* allocate and initialize private data */
|
|
chan = kmalloc(sizeof(x25_channel_t), GFP_ATOMIC);
|
|
if (chan == NULL){
|
|
return -ENOMEM;
|
|
}
|
|
|
|
memset(chan, 0, sizeof(x25_channel_t));
|
|
|
|
/* Bug Fix: Seg Err on PVC startup
|
|
* It must be here since bind_lcn_to_dev expects
|
|
* it bellow */
|
|
dev->priv = chan;
|
|
|
|
strcpy(chan->name, conf->name);
|
|
chan->card = card;
|
|
chan->dev = dev;
|
|
chan->common.sk = NULL;
|
|
chan->common.func = NULL;
|
|
chan->common.rw_bind = 0;
|
|
chan->tx_skb = chan->rx_skb = NULL;
|
|
|
|
/* verify media address */
|
|
if (conf->addr[0] == '@'){ /* SVC */
|
|
chan->common.svc = 1;
|
|
strncpy(chan->addr, &conf->addr[1], WAN_ADDRESS_SZ);
|
|
|
|
/* Set channel timeouts (default if not specified) */
|
|
chan->idle_timeout = (conf->idle_timeout) ?
|
|
conf->idle_timeout : 90;
|
|
chan->hold_timeout = (conf->hold_timeout) ?
|
|
conf->hold_timeout : 10;
|
|
|
|
}else if (is_digit(conf->addr[0])){ /* PVC */
|
|
int lcn = dec_to_uint(conf->addr, 0);
|
|
|
|
if ((lcn >= card->u.x.lo_pvc) && (lcn <= card->u.x.hi_pvc)){
|
|
bind_lcn_to_dev (card, dev, lcn);
|
|
}else{
|
|
printk(KERN_ERR
|
|
"%s: PVC %u is out of range on interface %s!\n",
|
|
wandev->name, lcn, chan->name);
|
|
err = -EINVAL;
|
|
}
|
|
}else{
|
|
printk(KERN_ERR
|
|
"%s: invalid media address on interface %s!\n",
|
|
wandev->name, chan->name);
|
|
err = -EINVAL;
|
|
}
|
|
|
|
if(strcmp(conf->usedby, "WANPIPE") == 0){
|
|
printk(KERN_INFO "%s: Running in WANPIPE mode %s\n",
|
|
wandev->name, chan->name);
|
|
chan->common.usedby = WANPIPE;
|
|
chan->protocol = htons(ETH_P_IP);
|
|
|
|
}else if(strcmp(conf->usedby, "API") == 0){
|
|
chan->common.usedby = API;
|
|
printk(KERN_INFO "%s: Running in API mode %s\n",
|
|
wandev->name, chan->name);
|
|
chan->protocol = htons(X25_PROT);
|
|
}
|
|
|
|
|
|
if (err){
|
|
kfree(chan);
|
|
dev->priv = NULL;
|
|
return err;
|
|
}
|
|
|
|
chan->enable_IPX = conf->enable_IPX;
|
|
|
|
if (chan->enable_IPX)
|
|
chan->protocol = htons(ETH_P_IPX);
|
|
|
|
if (conf->network_number)
|
|
chan->network_number = conf->network_number;
|
|
else
|
|
chan->network_number = 0xDEADBEEF;
|
|
|
|
/* prepare network device data space for registration */
|
|
strcpy(dev->name,chan->name);
|
|
|
|
dev->init = &if_init;
|
|
|
|
init_x25_channel_struct(chan);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*===================================================================
|
|
* Name: del_if(), Remove a logical channel.
|
|
*
|
|
* Purpose: To dynamically remove a logical channel.
|
|
*
|
|
* Rationale: Each logical channel should be dynamically
|
|
* removable. This functin is called by an
|
|
* IOCTL_IFDEL ioctl call or shutdown().
|
|
*
|
|
* Description: Do nothing.
|
|
*
|
|
* Called by: IOCTL_IFDEL : wanrouter_ioctl() from wanmain.c
|
|
* shutdown() from sdlamain.c
|
|
*
|
|
* Assumptions:
|
|
*
|
|
* Warnings:
|
|
*
|
|
* Return: 0 Ok. Void function.
|
|
*/
|
|
|
|
//FIXME Del IF Should be taken out now.
|
|
|
|
static int del_if(struct wan_device* wandev, struct net_device* dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*============================================================
|
|
* Name: wpx_exec
|
|
*
|
|
* Description: Execute adapter interface command.
|
|
* This option is currently dissabled.
|
|
*===========================================================*/
|
|
|
|
static int wpx_exec (struct sdla* card, void* u_cmd, void* u_data)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*============================================================
|
|
* Name: disable_comm
|
|
*
|
|
* Description: Disable communications during shutdown.
|
|
* Dont check return code because there is
|
|
* nothing we can do about it.
|
|
*
|
|
* Warning: Dev and private areas are gone at this point.
|
|
*===========================================================*/
|
|
|
|
static void disable_comm(sdla_t* card)
|
|
{
|
|
disable_comm_shutdown(card);
|
|
del_timer(&card->u.x.x25_timer);
|
|
return;
|
|
}
|
|
|
|
|
|
/*============================================================
|
|
* Network Device Interface
|
|
*===========================================================*/
|
|
|
|
/*===================================================================
|
|
* Name: if_init(), Netowrk Interface Initialization
|
|
*
|
|
* Purpose: To initialize a network interface device structure.
|
|
*
|
|
* Rationale: During network interface startup, the if_init
|
|
* is called by the kernel to initialize the
|
|
* netowrk device structure. Thus a driver
|
|
* can customze a network device.
|
|
*
|
|
* Description: Initialize the netowrk device call back
|
|
* routines. This is where we tell the kernel
|
|
* which function to use when it wants to send
|
|
* via our interface.
|
|
* Furthermore, we initialize the device flags,
|
|
* MTU and physical address of the board.
|
|
*
|
|
* Called by: Kernel (/usr/src/linux/net/core/dev.c)
|
|
* (dev->init())
|
|
*
|
|
* Assumptions: None
|
|
*
|
|
* Warnings: None
|
|
*
|
|
* Return: 0 Ok : Void function.
|
|
*/
|
|
static int if_init(struct net_device* dev)
|
|
{
|
|
x25_channel_t* chan = dev->priv;
|
|
sdla_t* card = chan->card;
|
|
struct wan_device* wandev = &card->wandev;
|
|
|
|
/* Initialize device driver entry points */
|
|
dev->open = &if_open;
|
|
dev->stop = &if_close;
|
|
dev->hard_header = &if_header;
|
|
dev->rebuild_header = &if_rebuild_hdr;
|
|
dev->hard_start_xmit = &if_send;
|
|
dev->get_stats = &if_stats;
|
|
dev->tx_timeout = &if_tx_timeout;
|
|
dev->watchdog_timeo = TX_TIMEOUT;
|
|
|
|
/* Initialize media-specific parameters */
|
|
dev->type = ARPHRD_PPP; /* ARP h/w type */
|
|
dev->flags |= IFF_POINTOPOINT;
|
|
dev->flags |= IFF_NOARP;
|
|
|
|
if (chan->common.usedby == API){
|
|
dev->mtu = X25_CHAN_MTU+sizeof(x25api_hdr_t);
|
|
}else{
|
|
dev->mtu = card->wandev.mtu;
|
|
}
|
|
|
|
dev->hard_header_len = X25_HRDHDR_SZ; /* media header length */
|
|
dev->addr_len = 2; /* hardware address length */
|
|
|
|
if (!chan->common.svc){
|
|
*(unsigned short*)dev->dev_addr = htons(chan->common.lcn);
|
|
}
|
|
|
|
/* Initialize hardware parameters (just for reference) */
|
|
dev->irq = wandev->irq;
|
|
dev->dma = wandev->dma;
|
|
dev->base_addr = wandev->ioport;
|
|
dev->mem_start = (unsigned long)wandev->maddr;
|
|
dev->mem_end = wandev->maddr + wandev->msize - 1;
|
|
|
|
/* Set transmit buffer queue length */
|
|
dev->tx_queue_len = 100;
|
|
SET_MODULE_OWNER(dev);
|
|
|
|
/* FIXME Why are we doing this */
|
|
set_chan_state(dev, WAN_DISCONNECTED);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*===================================================================
|
|
* Name: if_open(), Open/Bring up the Netowrk Interface
|
|
*
|
|
* Purpose: To bring up a network interface.
|
|
*
|
|
* Rationale:
|
|
*
|
|
* Description: Open network interface.
|
|
* o prevent module from unloading by incrementing use count
|
|
* o if link is disconnected then initiate connection
|
|
*
|
|
* Called by: Kernel (/usr/src/linux/net/core/dev.c)
|
|
* (dev->open())
|
|
*
|
|
* Assumptions: None
|
|
*
|
|
* Warnings: None
|
|
*
|
|
* Return: 0 Ok
|
|
* <0 Failure: Interface will not come up.
|
|
*/
|
|
|
|
static int if_open(struct net_device* dev)
|
|
{
|
|
x25_channel_t* chan = dev->priv;
|
|
sdla_t* card = chan->card;
|
|
struct timeval tv;
|
|
unsigned long smp_flags;
|
|
|
|
if (netif_running(dev))
|
|
return -EBUSY;
|
|
|
|
chan->tq_working = 0;
|
|
|
|
/* Initialize the workqueue */
|
|
INIT_WORK(&chan->common.wanpipe_work, (void *)x25api_bh, dev);
|
|
|
|
/* Allocate and initialize BH circular buffer */
|
|
/* Add 1 to MAX_BH_BUFF so we don't have test with (MAX_BH_BUFF-1) */
|
|
chan->bh_head = kmalloc((sizeof(bh_data_t)*(MAX_BH_BUFF+1)),GFP_ATOMIC);
|
|
|
|
if (chan->bh_head == NULL){
|
|
printk(KERN_INFO "%s: ERROR, failed to allocate memory ! BH_BUFFERS !\n",
|
|
card->devname);
|
|
|
|
return -ENOBUFS;
|
|
}
|
|
memset(chan->bh_head,0,(sizeof(bh_data_t)*(MAX_BH_BUFF+1)));
|
|
atomic_set(&chan->bh_buff_used, 0);
|
|
|
|
/* Increment the number of interfaces */
|
|
++card->u.x.no_dev;
|
|
|
|
wanpipe_open(card);
|
|
|
|
/* LAPB protocol only uses one interface, thus
|
|
* start the protocol after it comes up. */
|
|
if (card->u.x.LAPB_hdlc){
|
|
if (card->open_cnt == 1){
|
|
TX25Status* status = card->flags;
|
|
S508_S514_lock(card, &smp_flags);
|
|
x25_set_intr_mode(card, INTR_ON_TIMER);
|
|
status->imask &= ~INTR_ON_TIMER;
|
|
S508_S514_unlock(card, &smp_flags);
|
|
}
|
|
}else{
|
|
/* X25 can have multiple interfaces thus, start the
|
|
* protocol once all interfaces are up */
|
|
|
|
//FIXME: There is a bug here. If interface is
|
|
//brought down and up, it will try to enable comm.
|
|
if (card->open_cnt == card->u.x.num_of_ch){
|
|
|
|
S508_S514_lock(card, &smp_flags);
|
|
connect(card);
|
|
S508_S514_unlock(card, &smp_flags);
|
|
|
|
mod_timer(&card->u.x.x25_timer, jiffies + HZ);
|
|
}
|
|
}
|
|
/* Device is not up until the we are in connected state */
|
|
do_gettimeofday( &tv );
|
|
chan->router_start_time = tv.tv_sec;
|
|
|
|
netif_start_queue(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*===================================================================
|
|
* Name: if_close(), Close/Bring down the Netowrk Interface
|
|
*
|
|
* Purpose: To bring down a network interface.
|
|
*
|
|
* Rationale:
|
|
*
|
|
* Description: Close network interface.
|
|
* o decrement use module use count
|
|
*
|
|
* Called by: Kernel (/usr/src/linux/net/core/dev.c)
|
|
* (dev->close())
|
|
* ifconfig <name> down: will trigger the kernel
|
|
* which will call this function.
|
|
*
|
|
* Assumptions: None
|
|
*
|
|
* Warnings: None
|
|
*
|
|
* Return: 0 Ok
|
|
* <0 Failure: Interface will not exit properly.
|
|
*/
|
|
static int if_close(struct net_device* dev)
|
|
{
|
|
x25_channel_t* chan = dev->priv;
|
|
sdla_t* card = chan->card;
|
|
unsigned long smp_flags;
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
if ((chan->common.state == WAN_CONNECTED) ||
|
|
(chan->common.state == WAN_CONNECTING)){
|
|
S508_S514_lock(card, &smp_flags);
|
|
chan_disc(dev);
|
|
S508_S514_unlock(card, &smp_flags);
|
|
}
|
|
|
|
wanpipe_close(card);
|
|
|
|
S508_S514_lock(card, &smp_flags);
|
|
if (chan->bh_head){
|
|
int i;
|
|
struct sk_buff *skb;
|
|
|
|
for (i=0; i<(MAX_BH_BUFF+1); i++){
|
|
skb = ((bh_data_t *)&chan->bh_head[i])->skb;
|
|
if (skb != NULL){
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
}
|
|
kfree(chan->bh_head);
|
|
chan->bh_head=NULL;
|
|
}
|
|
S508_S514_unlock(card, &smp_flags);
|
|
|
|
/* If this is the last close, disconnect physical link */
|
|
if (!card->open_cnt){
|
|
S508_S514_lock(card, &smp_flags);
|
|
disconnect(card);
|
|
x25_set_intr_mode(card, 0);
|
|
S508_S514_unlock(card, &smp_flags);
|
|
}
|
|
|
|
/* Decrement the number of interfaces */
|
|
--card->u.x.no_dev;
|
|
return 0;
|
|
}
|
|
|
|
/*======================================================================
|
|
* Build media header.
|
|
* o encapsulate packet according to encapsulation type.
|
|
*
|
|
* The trick here is to put packet type (Ethertype) into 'protocol'
|
|
* field of the socket buffer, so that we don't forget it.
|
|
* If encapsulation fails, set skb->protocol to 0 and discard
|
|
* packet later.
|
|
*
|
|
* Return: media header length.
|
|
*======================================================================*/
|
|
|
|
static int if_header(struct sk_buff* skb, struct net_device* dev,
|
|
unsigned short type, void* daddr, void* saddr,
|
|
unsigned len)
|
|
{
|
|
x25_channel_t* chan = dev->priv;
|
|
int hdr_len = dev->hard_header_len;
|
|
|
|
skb->protocol = htons(type);
|
|
if (!chan->protocol){
|
|
hdr_len = wanrouter_encapsulate(skb, dev, type);
|
|
if (hdr_len < 0){
|
|
hdr_len = 0;
|
|
skb->protocol = htons(0);
|
|
}
|
|
}
|
|
return hdr_len;
|
|
}
|
|
|
|
/*===============================================================
|
|
* Re-build media header.
|
|
*
|
|
* Return: 1 physical address resolved.
|
|
* 0 physical address not resolved
|
|
*==============================================================*/
|
|
|
|
static int if_rebuild_hdr (struct sk_buff* skb)
|
|
{
|
|
struct net_device *dev = skb->dev;
|
|
x25_channel_t* chan = dev->priv;
|
|
sdla_t* card = chan->card;
|
|
|
|
printk(KERN_INFO "%s: rebuild_header() called for interface %s!\n",
|
|
card->devname, dev->name);
|
|
return 1;
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* Handle transmit timeout event from netif watchdog
|
|
*/
|
|
static void if_tx_timeout(struct net_device *dev)
|
|
{
|
|
x25_channel_t* chan = dev->priv;
|
|
sdla_t *card = chan->card;
|
|
|
|
/* If our device stays busy for at least 5 seconds then we will
|
|
* kick start the device by making dev->tbusy = 0. We expect
|
|
* that our device never stays busy more than 5 seconds. So this
|
|
* is only used as a last resort.
|
|
*/
|
|
|
|
++chan->if_send_stat.if_send_tbusy_timeout;
|
|
printk (KERN_INFO "%s: Transmit timed out on %s\n",
|
|
card->devname, dev->name);
|
|
netif_wake_queue (dev);
|
|
}
|
|
|
|
|
|
/*=========================================================================
|
|
* Send a packet on a network interface.
|
|
* o set tbusy flag (marks start of the transmission).
|
|
* o check link state. If link is not up, then drop the packet.
|
|
* o check channel status. If it's down then initiate a call.
|
|
* o pass a packet to corresponding WAN device.
|
|
* o free socket buffer
|
|
*
|
|
* Return: 0 complete (socket buffer must be freed)
|
|
* non-0 packet may be re-transmitted (tbusy must be set)
|
|
*
|
|
* Notes:
|
|
* 1. This routine is called either by the protocol stack or by the "net
|
|
* bottom half" (with interrupts enabled).
|
|
* 2. Setting tbusy flag will inhibit further transmit requests from the
|
|
* protocol stack and can be used for flow control with protocol layer.
|
|
*
|
|
*========================================================================*/
|
|
|
|
static int if_send(struct sk_buff* skb, struct net_device* dev)
|
|
{
|
|
x25_channel_t* chan = dev->priv;
|
|
sdla_t* card = chan->card;
|
|
TX25Status* status = card->flags;
|
|
int udp_type;
|
|
unsigned long smp_flags=0;
|
|
|
|
++chan->if_send_stat.if_send_entry;
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
/* No need to check frame length, since socket code
|
|
* will perform the check for us */
|
|
|
|
chan->tick_counter = jiffies;
|
|
|
|
/* Critical region starts here */
|
|
S508_S514_lock(card, &smp_flags);
|
|
|
|
if (test_and_set_bit(SEND_CRIT, (void*)&card->wandev.critical)){
|
|
printk(KERN_INFO "Hit critical in if_send()! %lx\n",card->wandev.critical);
|
|
goto if_send_crit_exit;
|
|
}
|
|
|
|
udp_type = udp_pkt_type(skb, card);
|
|
|
|
if(udp_type != UDP_INVALID_TYPE) {
|
|
|
|
if(store_udp_mgmt_pkt(udp_type, UDP_PKT_FRM_STACK, card, dev, skb,
|
|
chan->common.lcn)) {
|
|
|
|
status->imask |= INTR_ON_TIMER;
|
|
if (udp_type == UDP_XPIPE_TYPE){
|
|
chan->if_send_stat.if_send_PIPE_request++;
|
|
}
|
|
}
|
|
netif_start_queue(dev);
|
|
clear_bit(SEND_CRIT,(void*)&card->wandev.critical);
|
|
S508_S514_unlock(card, &smp_flags);
|
|
return 0;
|
|
}
|
|
|
|
if (chan->transmit_length){
|
|
//FIXME: This check doesn't make sense any more
|
|
if (chan->common.state != WAN_CONNECTED){
|
|
chan->transmit_length=0;
|
|
atomic_set(&chan->common.driver_busy,0);
|
|
}else{
|
|
netif_stop_queue(dev);
|
|
++card->u.x.tx_interrupts_pending;
|
|
status->imask |= INTR_ON_TX_FRAME;
|
|
clear_bit(SEND_CRIT,(void*)&card->wandev.critical);
|
|
S508_S514_unlock(card, &smp_flags);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
if (card->wandev.state != WAN_CONNECTED){
|
|
++chan->ifstats.tx_dropped;
|
|
++card->wandev.stats.tx_dropped;
|
|
++chan->if_send_stat.if_send_wan_disconnected;
|
|
|
|
}else if ( chan->protocol && (chan->protocol != skb->protocol)){
|
|
printk(KERN_INFO
|
|
"%s: unsupported Ethertype 0x%04X on interface %s!\n",
|
|
chan->name, htons(skb->protocol), dev->name);
|
|
|
|
printk(KERN_INFO "PROTO %Xn", htons(chan->protocol));
|
|
++chan->ifstats.tx_errors;
|
|
++chan->ifstats.tx_dropped;
|
|
++card->wandev.stats.tx_dropped;
|
|
++chan->if_send_stat.if_send_protocol_error;
|
|
|
|
}else switch (chan->common.state){
|
|
|
|
case WAN_DISCONNECTED:
|
|
/* Try to establish connection. If succeded, then start
|
|
* transmission, else drop a packet.
|
|
*/
|
|
if (chan->common.usedby == API){
|
|
++chan->ifstats.tx_dropped;
|
|
++card->wandev.stats.tx_dropped;
|
|
break;
|
|
}else{
|
|
if (chan_connect(dev) != 0){
|
|
++chan->ifstats.tx_dropped;
|
|
++card->wandev.stats.tx_dropped;
|
|
break;
|
|
}
|
|
}
|
|
/* fall through */
|
|
|
|
case WAN_CONNECTED:
|
|
if( skb->protocol == htons(ETH_P_IPX)) {
|
|
if(chan->enable_IPX) {
|
|
switch_net_numbers( skb->data,
|
|
chan->network_number, 0);
|
|
} else {
|
|
++card->wandev.stats.tx_dropped;
|
|
++chan->ifstats.tx_dropped;
|
|
++chan->if_send_stat.if_send_protocol_error;
|
|
goto if_send_crit_exit;
|
|
}
|
|
}
|
|
/* We never drop here, if cannot send than, copy
|
|
* a packet into a transmit buffer
|
|
*/
|
|
chan_send(dev, skb->data, skb->len, 0);
|
|
break;
|
|
|
|
default:
|
|
++chan->ifstats.tx_dropped;
|
|
++card->wandev.stats.tx_dropped;
|
|
break;
|
|
}
|
|
|
|
|
|
if_send_crit_exit:
|
|
|
|
dev_kfree_skb_any(skb);
|
|
|
|
netif_start_queue(dev);
|
|
clear_bit(SEND_CRIT,(void*)&card->wandev.critical);
|
|
S508_S514_unlock(card, &smp_flags);
|
|
return 0;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Setup so that a frame can be transmitted on the occurrence of a transmit
|
|
* interrupt.
|
|
*===========================================================================*/
|
|
|
|
static void setup_for_delayed_transmit(struct net_device* dev, void* buf,
|
|
unsigned len)
|
|
{
|
|
x25_channel_t* chan = dev->priv;
|
|
sdla_t* card = chan->card;
|
|
TX25Status* status = card->flags;
|
|
|
|
++chan->if_send_stat.if_send_adptr_bfrs_full;
|
|
|
|
if(chan->transmit_length) {
|
|
printk(KERN_INFO "%s: Error, transmit length set in delayed transmit!\n",
|
|
card->devname);
|
|
return;
|
|
}
|
|
|
|
if (chan->common.usedby == API){
|
|
if (len > X25_CHAN_MTU+sizeof(x25api_hdr_t)) {
|
|
++chan->ifstats.tx_dropped;
|
|
++card->wandev.stats.tx_dropped;
|
|
printk(KERN_INFO "%s: Length is too big for delayed transmit\n",
|
|
card->devname);
|
|
return;
|
|
}
|
|
}else{
|
|
if (len > X25_MAX_DATA) {
|
|
++chan->ifstats.tx_dropped;
|
|
++card->wandev.stats.tx_dropped;
|
|
printk(KERN_INFO "%s: Length is too big for delayed transmit\n",
|
|
card->devname);
|
|
return;
|
|
}
|
|
}
|
|
|
|
chan->transmit_length = len;
|
|
atomic_set(&chan->common.driver_busy,1);
|
|
memcpy(chan->transmit_buffer, buf, len);
|
|
|
|
++chan->if_send_stat.if_send_tx_int_enabled;
|
|
|
|
/* Enable Transmit Interrupt */
|
|
++card->u.x.tx_interrupts_pending;
|
|
status->imask |= INTR_ON_TX_FRAME;
|
|
}
|
|
|
|
|
|
/*===============================================================
|
|
* net_device_stats
|
|
*
|
|
* Get ethernet-style interface statistics.
|
|
* Return a pointer to struct enet_statistics.
|
|
*
|
|
*==============================================================*/
|
|
static struct net_device_stats *if_stats(struct net_device* dev)
|
|
{
|
|
x25_channel_t *chan = dev->priv;
|
|
|
|
if(chan == NULL)
|
|
return NULL;
|
|
|
|
return &chan->ifstats;
|
|
}
|
|
|
|
|
|
/*
|
|
* Interrupt Handlers
|
|
*/
|
|
|
|
/*
|
|
* X.25 Interrupt Service Routine.
|
|
*/
|
|
|
|
static void wpx_isr (sdla_t* card)
|
|
{
|
|
TX25Status* status = card->flags;
|
|
|
|
card->in_isr = 1;
|
|
++card->statistics.isr_entry;
|
|
|
|
if (test_bit(PERI_CRIT,(void*)&card->wandev.critical)){
|
|
card->in_isr=0;
|
|
status->iflags = 0;
|
|
return;
|
|
}
|
|
|
|
if (test_bit(SEND_CRIT, (void*)&card->wandev.critical)){
|
|
|
|
printk(KERN_INFO "%s: wpx_isr: wandev.critical set to 0x%02lx, int type = 0x%02x\n",
|
|
card->devname, card->wandev.critical, status->iflags);
|
|
card->in_isr = 0;
|
|
status->iflags = 0;
|
|
return;
|
|
}
|
|
|
|
/* For all interrupts set the critical flag to CRITICAL_RX_INTR.
|
|
* If the if_send routine is called with this flag set it will set
|
|
* the enable transmit flag to 1. (for a delayed interrupt)
|
|
*/
|
|
switch (status->iflags){
|
|
|
|
case RX_INTR_PENDING: /* receive interrupt */
|
|
rx_intr(card);
|
|
break;
|
|
|
|
case TX_INTR_PENDING: /* transmit interrupt */
|
|
tx_intr(card);
|
|
break;
|
|
|
|
case MODEM_INTR_PENDING: /* modem status interrupt */
|
|
status_intr(card);
|
|
break;
|
|
|
|
case X25_ASY_TRANS_INTR_PENDING: /* network event interrupt */
|
|
event_intr(card);
|
|
break;
|
|
|
|
case TIMER_INTR_PENDING:
|
|
timer_intr(card);
|
|
break;
|
|
|
|
default: /* unwanted interrupt */
|
|
spur_intr(card);
|
|
}
|
|
|
|
card->in_isr = 0;
|
|
status->iflags = 0; /* clear interrupt condition */
|
|
}
|
|
|
|
/*
|
|
* Receive interrupt handler.
|
|
* This routine handles fragmented IP packets using M-bit according to the
|
|
* RFC1356.
|
|
* o map ligical channel number to network interface.
|
|
* o allocate socket buffer or append received packet to the existing one.
|
|
* o if M-bit is reset (i.e. it's the last packet in a sequence) then
|
|
* decapsulate packet and pass socket buffer to the protocol stack.
|
|
*
|
|
* Notes:
|
|
* 1. When allocating a socket buffer, if M-bit is set then more data is
|
|
* coming and we have to allocate buffer for the maximum IP packet size
|
|
* expected on this channel.
|
|
* 2. If something goes wrong and X.25 packet has to be dropped (e.g. no
|
|
* socket buffers available) the whole packet sequence must be discarded.
|
|
*/
|
|
|
|
static void rx_intr (sdla_t* card)
|
|
{
|
|
TX25Mbox* rxmb = card->rxmb;
|
|
unsigned lcn = rxmb->cmd.lcn;
|
|
struct net_device* dev = find_channel(card,lcn);
|
|
x25_channel_t* chan;
|
|
struct sk_buff* skb=NULL;
|
|
|
|
if (dev == NULL){
|
|
/* Invalid channel, discard packet */
|
|
printk(KERN_INFO "%s: receiving on orphaned LCN %d!\n",
|
|
card->devname, lcn);
|
|
return;
|
|
}
|
|
|
|
chan = dev->priv;
|
|
chan->i_timeout_sofar = jiffies;
|
|
|
|
|
|
/* Copy the data from the board, into an
|
|
* skb buffer
|
|
*/
|
|
if (wanpipe_pull_data_in_skb(card,dev,&skb)){
|
|
++chan->ifstats.rx_dropped;
|
|
++card->wandev.stats.rx_dropped;
|
|
++chan->rx_intr_stat.rx_intr_no_socket;
|
|
++chan->rx_intr_stat.rx_intr_bfr_not_passed_to_stack;
|
|
return;
|
|
}
|
|
|
|
dev->last_rx = jiffies; /* timestamp */
|
|
|
|
|
|
/* ------------ API ----------------*/
|
|
|
|
if (chan->common.usedby == API){
|
|
|
|
if (bh_enqueue(dev, skb)){
|
|
++chan->ifstats.rx_dropped;
|
|
++card->wandev.stats.rx_dropped;
|
|
++chan->rx_intr_stat.rx_intr_bfr_not_passed_to_stack;
|
|
dev_kfree_skb_any(skb);
|
|
return;
|
|
}
|
|
|
|
++chan->ifstats.rx_packets;
|
|
chan->ifstats.rx_bytes += skb->len;
|
|
|
|
|
|
chan->rx_skb = NULL;
|
|
if (!test_and_set_bit(0, &chan->tq_working)){
|
|
wanpipe_queue_work(&chan->common.wanpipe_work);
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
/* ------------- WANPIPE -------------------*/
|
|
|
|
/* set rx_skb to NULL so we won't access it later when kernel already owns it */
|
|
chan->rx_skb=NULL;
|
|
|
|
/* Decapsulate packet, if necessary */
|
|
if (!skb->protocol && !wanrouter_type_trans(skb, dev)){
|
|
/* can't decapsulate packet */
|
|
dev_kfree_skb_any(skb);
|
|
++chan->ifstats.rx_errors;
|
|
++chan->ifstats.rx_dropped;
|
|
++card->wandev.stats.rx_dropped;
|
|
++chan->rx_intr_stat.rx_intr_bfr_not_passed_to_stack;
|
|
|
|
}else{
|
|
if( handle_IPXWAN(skb->data, chan->name,
|
|
chan->enable_IPX, chan->network_number,
|
|
skb->protocol)){
|
|
|
|
if( chan->enable_IPX ){
|
|
if(chan_send(dev, skb->data, skb->len,0)){
|
|
chan->tx_skb = skb;
|
|
}else{
|
|
dev_kfree_skb_any(skb);
|
|
++chan->rx_intr_stat.rx_intr_bfr_not_passed_to_stack;
|
|
}
|
|
}else{
|
|
/* increment IPX packet dropped statistic */
|
|
++chan->ifstats.rx_dropped;
|
|
++chan->rx_intr_stat.rx_intr_bfr_not_passed_to_stack;
|
|
}
|
|
}else{
|
|
skb->mac.raw = skb->data;
|
|
chan->ifstats.rx_bytes += skb->len;
|
|
++chan->ifstats.rx_packets;
|
|
++chan->rx_intr_stat.rx_intr_bfr_passed_to_stack;
|
|
netif_rx(skb);
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
static int wanpipe_pull_data_in_skb(sdla_t *card, struct net_device *dev,
|
|
struct sk_buff **skb)
|
|
{
|
|
void *bufptr;
|
|
TX25Mbox* rxmb = card->rxmb;
|
|
unsigned len = rxmb->cmd.length; /* packet length */
|
|
unsigned qdm = rxmb->cmd.qdm; /* Q,D and M bits */
|
|
x25_channel_t *chan = dev->priv;
|
|
struct sk_buff *new_skb = *skb;
|
|
|
|
if (chan->common.usedby == WANPIPE){
|
|
if (chan->drop_sequence){
|
|
if (!(qdm & 0x01)){
|
|
chan->drop_sequence = 0;
|
|
}
|
|
return 1;
|
|
}
|
|
new_skb = chan->rx_skb;
|
|
}else{
|
|
/* Add on the API header to the received
|
|
* data
|
|
*/
|
|
len += sizeof(x25api_hdr_t);
|
|
}
|
|
|
|
if (new_skb == NULL){
|
|
int bufsize;
|
|
|
|
if (chan->common.usedby == WANPIPE){
|
|
bufsize = (qdm & 0x01) ? dev->mtu : len;
|
|
}else{
|
|
bufsize = len;
|
|
}
|
|
|
|
/* Allocate new socket buffer */
|
|
new_skb = dev_alloc_skb(bufsize + dev->hard_header_len);
|
|
if (new_skb == NULL){
|
|
printk(KERN_INFO "%s: no socket buffers available!\n",
|
|
card->devname);
|
|
chan->drop_sequence = 1; /* set flag */
|
|
++chan->ifstats.rx_dropped;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
if (skb_tailroom(new_skb) < len){
|
|
/* No room for the packet. Call off the whole thing! */
|
|
dev_kfree_skb_any(new_skb);
|
|
if (chan->common.usedby == WANPIPE){
|
|
chan->rx_skb = NULL;
|
|
if (qdm & 0x01){
|
|
chan->drop_sequence = 1;
|
|
}
|
|
}
|
|
|
|
printk(KERN_INFO "%s: unexpectedly long packet sequence "
|
|
"on interface %s!\n", card->devname, dev->name);
|
|
++chan->ifstats.rx_length_errors;
|
|
return 1;
|
|
}
|
|
|
|
bufptr = skb_put(new_skb,len);
|
|
|
|
|
|
if (chan->common.usedby == API){
|
|
/* Fill in the x25api header
|
|
*/
|
|
x25api_t * api_data = (x25api_t*)bufptr;
|
|
api_data->hdr.qdm = rxmb->cmd.qdm;
|
|
api_data->hdr.cause = rxmb->cmd.cause;
|
|
api_data->hdr.diagn = rxmb->cmd.diagn;
|
|
api_data->hdr.length = rxmb->cmd.length;
|
|
memcpy(api_data->data, rxmb->data, rxmb->cmd.length);
|
|
}else{
|
|
memcpy(bufptr, rxmb->data, len);
|
|
}
|
|
|
|
new_skb->dev = dev;
|
|
|
|
if (chan->common.usedby == API){
|
|
new_skb->mac.raw = new_skb->data;
|
|
new_skb->protocol = htons(X25_PROT);
|
|
new_skb->pkt_type = WAN_PACKET_DATA;
|
|
}else{
|
|
new_skb->protocol = chan->protocol;
|
|
chan->rx_skb = new_skb;
|
|
}
|
|
|
|
/* If qdm bit is set, more data is coming
|
|
* thus, exit and wait for more data before
|
|
* sending the packet up. (Used by router only)
|
|
*/
|
|
if ((qdm & 0x01) && (chan->common.usedby == WANPIPE))
|
|
return 1;
|
|
|
|
*skb = new_skb;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*===============================================================
|
|
* tx_intr
|
|
*
|
|
* Transmit interrupt handler.
|
|
* For each dev, check that there is something to send.
|
|
* If data available, transmit.
|
|
*
|
|
*===============================================================*/
|
|
|
|
static void tx_intr (sdla_t* card)
|
|
{
|
|
struct net_device *dev;
|
|
TX25Status* status = card->flags;
|
|
unsigned char more_to_tx=0;
|
|
x25_channel_t *chan=NULL;
|
|
int i=0;
|
|
|
|
if (card->u.x.tx_dev == NULL){
|
|
card->u.x.tx_dev = card->wandev.dev;
|
|
}
|
|
|
|
dev = card->u.x.tx_dev;
|
|
|
|
for (;;){
|
|
|
|
chan = dev->priv;
|
|
if (chan->transmit_length){
|
|
/* Device was set to transmit, check if the TX
|
|
* buffers are available
|
|
*/
|
|
if (chan->common.state != WAN_CONNECTED){
|
|
chan->transmit_length = 0;
|
|
atomic_set(&chan->common.driver_busy,0);
|
|
chan->tx_offset=0;
|
|
if (netif_queue_stopped(dev)){
|
|
if (chan->common.usedby == API){
|
|
netif_start_queue(dev);
|
|
wakeup_sk_bh(dev);
|
|
}else{
|
|
netif_wake_queue(dev);
|
|
}
|
|
}
|
|
dev = move_dev_to_next(card,dev);
|
|
break;
|
|
}
|
|
|
|
if ((status->cflags[chan->ch_idx] & 0x40 || card->u.x.LAPB_hdlc) &&
|
|
(*card->u.x.hdlc_buf_status & 0x40) ){
|
|
/* Tx buffer available, we can send */
|
|
|
|
if (tx_intr_send(card, dev)){
|
|
more_to_tx=1;
|
|
}
|
|
|
|
/* If more than one interface present, move the
|
|
* device pointer to the next interface, so on the
|
|
* next TX interrupt we will try sending from it.
|
|
*/
|
|
dev = move_dev_to_next(card,dev);
|
|
break;
|
|
}else{
|
|
/* Tx buffers not available, but device set
|
|
* the TX interrupt. Set more_to_tx and try
|
|
* to transmit for other devices.
|
|
*/
|
|
more_to_tx=1;
|
|
dev = move_dev_to_next(card,dev);
|
|
}
|
|
|
|
}else{
|
|
/* This device was not set to transmit,
|
|
* go to next
|
|
*/
|
|
dev = move_dev_to_next(card,dev);
|
|
}
|
|
|
|
if (++i == card->u.x.no_dev){
|
|
if (!more_to_tx){
|
|
DBG_PRINTK(KERN_INFO "%s: Nothing to Send in TX INTR\n",
|
|
card->devname);
|
|
}
|
|
break;
|
|
}
|
|
|
|
} //End of FOR
|
|
|
|
card->u.x.tx_dev = dev;
|
|
|
|
if (!more_to_tx){
|
|
/* if any other interfaces have transmit interrupts pending, */
|
|
/* do not disable the global transmit interrupt */
|
|
if (!(--card->u.x.tx_interrupts_pending)){
|
|
status->imask &= ~INTR_ON_TX_FRAME;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
/*===============================================================
|
|
* move_dev_to_next
|
|
*
|
|
*
|
|
*===============================================================*/
|
|
|
|
|
|
struct net_device *move_dev_to_next(sdla_t *card, struct net_device *dev)
|
|
{
|
|
if (card->u.x.no_dev != 1){
|
|
if (!*((struct net_device **)dev->priv))
|
|
return card->wandev.dev;
|
|
else
|
|
return *((struct net_device **)dev->priv);
|
|
}
|
|
return dev;
|
|
}
|
|
|
|
/*===============================================================
|
|
* tx_intr_send
|
|
*
|
|
*
|
|
*===============================================================*/
|
|
|
|
static int tx_intr_send(sdla_t *card, struct net_device *dev)
|
|
{
|
|
x25_channel_t* chan = dev->priv;
|
|
|
|
if (chan_send (dev,chan->transmit_buffer,chan->transmit_length,1)){
|
|
|
|
/* Packet was split up due to its size, do not disable
|
|
* tx_intr
|
|
*/
|
|
return 1;
|
|
}
|
|
|
|
chan->transmit_length=0;
|
|
atomic_set(&chan->common.driver_busy,0);
|
|
chan->tx_offset=0;
|
|
|
|
/* If we are in API mode, wakeup the
|
|
* sock BH handler, not the NET_BH */
|
|
if (netif_queue_stopped(dev)){
|
|
if (chan->common.usedby == API){
|
|
netif_start_queue(dev);
|
|
wakeup_sk_bh(dev);
|
|
}else{
|
|
netif_wake_queue(dev);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*===============================================================
|
|
* timer_intr
|
|
*
|
|
* Timer interrupt handler.
|
|
* Check who called the timer interrupt and perform
|
|
* action accordingly.
|
|
*
|
|
*===============================================================*/
|
|
|
|
static void timer_intr (sdla_t *card)
|
|
{
|
|
TX25Status* status = card->flags;
|
|
|
|
if (card->u.x.timer_int_enabled & TMR_INT_ENABLED_CMD_EXEC){
|
|
|
|
if (timer_intr_cmd_exec(card) == 0){
|
|
card->u.x.timer_int_enabled &=
|
|
~TMR_INT_ENABLED_CMD_EXEC;
|
|
}
|
|
|
|
}else if(card->u.x.timer_int_enabled & TMR_INT_ENABLED_UDP_PKT) {
|
|
|
|
if ((*card->u.x.hdlc_buf_status & 0x40) &&
|
|
card->u.x.udp_type == UDP_XPIPE_TYPE){
|
|
|
|
if(process_udp_mgmt_pkt(card)) {
|
|
card->u.x.timer_int_enabled &=
|
|
~TMR_INT_ENABLED_UDP_PKT;
|
|
}
|
|
}
|
|
|
|
}else if (card->u.x.timer_int_enabled & TMR_INT_ENABLED_POLL_ACTIVE) {
|
|
|
|
struct net_device *dev = card->u.x.poll_device;
|
|
x25_channel_t *chan = NULL;
|
|
|
|
if (!dev){
|
|
card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_POLL_ACTIVE;
|
|
return;
|
|
}
|
|
chan = dev->priv;
|
|
|
|
printk(KERN_INFO
|
|
"%s: Closing down Idle link %s on LCN %d\n",
|
|
card->devname,chan->name,chan->common.lcn);
|
|
chan->i_timeout_sofar = jiffies;
|
|
chan_disc(dev);
|
|
card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_POLL_ACTIVE;
|
|
card->u.x.poll_device=NULL;
|
|
|
|
}else if (card->u.x.timer_int_enabled & TMR_INT_ENABLED_POLL_CONNECT_ON) {
|
|
|
|
wanpipe_set_state(card, WAN_CONNECTED);
|
|
if (card->u.x.LAPB_hdlc){
|
|
struct net_device *dev = card->wandev.dev;
|
|
set_chan_state(dev,WAN_CONNECTED);
|
|
send_delayed_cmd_result(card,dev,card->mbox);
|
|
}
|
|
|
|
/* 0x8F enable all interrupts */
|
|
x25_set_intr_mode(card, INTR_ON_RX_FRAME|
|
|
INTR_ON_TX_FRAME|
|
|
INTR_ON_MODEM_STATUS_CHANGE|
|
|
//INTR_ON_COMMAND_COMPLETE|
|
|
X25_ASY_TRANS_INTR_PENDING |
|
|
INTR_ON_TIMER |
|
|
DIRECT_RX_INTR_USAGE
|
|
);
|
|
|
|
status->imask &= ~INTR_ON_TX_FRAME; /* mask Tx interrupts */
|
|
card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_POLL_CONNECT_ON;
|
|
|
|
}else if (card->u.x.timer_int_enabled & TMR_INT_ENABLED_POLL_CONNECT_OFF) {
|
|
|
|
//printk(KERN_INFO "Poll connect, Turning OFF\n");
|
|
disconnect(card);
|
|
card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_POLL_CONNECT_OFF;
|
|
|
|
}else if (card->u.x.timer_int_enabled & TMR_INT_ENABLED_POLL_DISCONNECT) {
|
|
|
|
//printk(KERN_INFO "POll disconnect, trying to connect\n");
|
|
connect(card);
|
|
card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_POLL_DISCONNECT;
|
|
|
|
}else if (card->u.x.timer_int_enabled & TMR_INT_ENABLED_UPDATE){
|
|
|
|
if (*card->u.x.hdlc_buf_status & 0x40){
|
|
x25_get_err_stats(card);
|
|
x25_get_stats(card);
|
|
card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_UPDATE;
|
|
}
|
|
}
|
|
|
|
if(!card->u.x.timer_int_enabled){
|
|
//printk(KERN_INFO "Turning Timer Off \n");
|
|
status->imask &= ~INTR_ON_TIMER;
|
|
}
|
|
}
|
|
|
|
/*====================================================================
|
|
* Modem status interrupt handler.
|
|
*===================================================================*/
|
|
static void status_intr (sdla_t* card)
|
|
{
|
|
|
|
/* Added to avoid Modem status message flooding */
|
|
static TX25ModemStatus last_stat;
|
|
|
|
TX25Mbox* mbox = card->mbox;
|
|
TX25ModemStatus *modem_status;
|
|
struct net_device *dev;
|
|
x25_channel_t *chan;
|
|
int err;
|
|
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
mbox->cmd.command = X25_READ_MODEM_STATUS;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
if (err){
|
|
x25_error(card, err, X25_READ_MODEM_STATUS, 0);
|
|
}else{
|
|
|
|
modem_status = (TX25ModemStatus*)mbox->data;
|
|
|
|
/* Check if the last status was the same
|
|
* if it was, do NOT print message again */
|
|
|
|
if (last_stat.status != modem_status->status){
|
|
|
|
printk(KERN_INFO "%s: Modem Status Change: DCD=%s, CTS=%s\n",
|
|
card->devname,DCD(modem_status->status),CTS(modem_status->status));
|
|
|
|
last_stat.status = modem_status->status;
|
|
|
|
if (card->u.x.oob_on_modem){
|
|
|
|
mbox->cmd.pktType = mbox->cmd.command;
|
|
mbox->cmd.result = 0x08;
|
|
|
|
/* Send a OOB to all connected sockets */
|
|
for (dev = card->wandev.dev; dev;
|
|
dev = *((struct net_device**)dev->priv)) {
|
|
chan=dev->priv;
|
|
if (chan->common.usedby == API){
|
|
send_oob_msg(card,dev,mbox);
|
|
}
|
|
}
|
|
|
|
/* The modem OOB message will probably kill the
|
|
* the link. If we don't clear the flag here,
|
|
* a deadlock could occur */
|
|
if (atomic_read(&card->u.x.command_busy)){
|
|
atomic_set(&card->u.x.command_busy,0);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
mbox->cmd.command = X25_HDLC_LINK_STATUS;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
if (err){
|
|
x25_error(card, err, X25_HDLC_LINK_STATUS, 0);
|
|
}
|
|
|
|
}
|
|
|
|
/*====================================================================
|
|
* Network event interrupt handler.
|
|
*===================================================================*/
|
|
static void event_intr (sdla_t* card)
|
|
{
|
|
x25_fetch_events(card);
|
|
}
|
|
|
|
/*====================================================================
|
|
* Spurious interrupt handler.
|
|
* o print a warning
|
|
* o
|
|
*====================================================================*/
|
|
|
|
static void spur_intr (sdla_t* card)
|
|
{
|
|
printk(KERN_INFO "%s: spurious interrupt!\n", card->devname);
|
|
}
|
|
|
|
|
|
/*
|
|
* Background Polling Routines
|
|
*/
|
|
|
|
/*====================================================================
|
|
* Main polling routine.
|
|
* This routine is repeatedly called by the WANPIPE 'thread' to allow for
|
|
* time-dependent housekeeping work.
|
|
*
|
|
* Notes:
|
|
* 1. This routine may be called on interrupt context with all interrupts
|
|
* enabled. Beware!
|
|
*====================================================================*/
|
|
|
|
static void wpx_poll (sdla_t *card)
|
|
{
|
|
if (!card->wandev.dev){
|
|
goto wpx_poll_exit;
|
|
}
|
|
|
|
if (card->open_cnt != card->u.x.num_of_ch){
|
|
goto wpx_poll_exit;
|
|
}
|
|
|
|
if (test_bit(PERI_CRIT,&card->wandev.critical)){
|
|
goto wpx_poll_exit;
|
|
}
|
|
|
|
if (test_bit(SEND_CRIT,&card->wandev.critical)){
|
|
goto wpx_poll_exit;
|
|
}
|
|
|
|
switch(card->wandev.state){
|
|
case WAN_CONNECTED:
|
|
poll_active(card);
|
|
break;
|
|
|
|
case WAN_CONNECTING:
|
|
poll_connecting(card);
|
|
break;
|
|
|
|
case WAN_DISCONNECTED:
|
|
poll_disconnected(card);
|
|
break;
|
|
}
|
|
|
|
wpx_poll_exit:
|
|
clear_bit(POLL_CRIT,&card->wandev.critical);
|
|
return;
|
|
}
|
|
|
|
static void trigger_x25_poll(sdla_t *card)
|
|
{
|
|
schedule_work(&card->u.x.x25_poll_work);
|
|
}
|
|
|
|
/*====================================================================
|
|
* Handle physical link establishment phase.
|
|
* o if connection timed out, disconnect the link.
|
|
*===================================================================*/
|
|
|
|
static void poll_connecting (sdla_t* card)
|
|
{
|
|
volatile TX25Status* status = card->flags;
|
|
|
|
if (status->gflags & X25_HDLC_ABM){
|
|
|
|
timer_intr_exec (card, TMR_INT_ENABLED_POLL_CONNECT_ON);
|
|
|
|
}else if ((jiffies - card->state_tick) > CONNECT_TIMEOUT){
|
|
|
|
timer_intr_exec (card, TMR_INT_ENABLED_POLL_CONNECT_OFF);
|
|
|
|
}
|
|
}
|
|
|
|
/*====================================================================
|
|
* Handle physical link disconnected phase.
|
|
* o if hold-down timeout has expired and there are open interfaces,
|
|
* connect link.
|
|
*===================================================================*/
|
|
|
|
static void poll_disconnected (sdla_t* card)
|
|
{
|
|
struct net_device *dev;
|
|
x25_channel_t *chan;
|
|
TX25Status* status = card->flags;
|
|
|
|
if (!card->u.x.LAPB_hdlc && card->open_cnt &&
|
|
((jiffies - card->state_tick) > HOLD_DOWN_TIME)){
|
|
timer_intr_exec(card, TMR_INT_ENABLED_POLL_DISCONNECT);
|
|
}
|
|
|
|
|
|
if ((dev=card->wandev.dev) == NULL)
|
|
return;
|
|
|
|
if ((chan=dev->priv) == NULL)
|
|
return;
|
|
|
|
if (chan->common.usedby == API &&
|
|
atomic_read(&chan->common.command) &&
|
|
card->u.x.LAPB_hdlc){
|
|
|
|
if (!(card->u.x.timer_int_enabled & TMR_INT_ENABLED_CMD_EXEC))
|
|
card->u.x.timer_int_enabled |= TMR_INT_ENABLED_CMD_EXEC;
|
|
|
|
if (!(status->imask & INTR_ON_TIMER))
|
|
status->imask |= INTR_ON_TIMER;
|
|
}
|
|
|
|
}
|
|
|
|
/*====================================================================
|
|
* Handle active link phase.
|
|
* o fetch X.25 asynchronous events.
|
|
* o kick off transmission on all interfaces.
|
|
*===================================================================*/
|
|
|
|
static void poll_active (sdla_t* card)
|
|
{
|
|
struct net_device* dev;
|
|
TX25Status* status = card->flags;
|
|
|
|
for (dev = card->wandev.dev; dev;
|
|
dev = *((struct net_device **)dev->priv)){
|
|
x25_channel_t* chan = dev->priv;
|
|
|
|
/* If SVC has been idle long enough, close virtual circuit */
|
|
if ( chan->common.svc &&
|
|
chan->common.state == WAN_CONNECTED &&
|
|
chan->common.usedby == WANPIPE ){
|
|
|
|
if( (jiffies - chan->i_timeout_sofar) / HZ > chan->idle_timeout ){
|
|
/* Close svc */
|
|
card->u.x.poll_device=dev;
|
|
timer_intr_exec (card, TMR_INT_ENABLED_POLL_ACTIVE);
|
|
}
|
|
}
|
|
|
|
#ifdef PRINT_DEBUG
|
|
chan->ifstats.tx_compressed = atomic_read(&chan->common.command);
|
|
chan->ifstats.tx_errors = chan->common.state;
|
|
chan->ifstats.rx_fifo_errors = atomic_read(&card->u.x.command_busy);
|
|
++chan->ifstats.tx_bytes;
|
|
|
|
chan->ifstats.rx_fifo_errors=atomic_read(&chan->common.disconnect);
|
|
chan->ifstats.multicast=atomic_read(&chan->bh_buff_used);
|
|
chan->ifstats.rx_length_errors=*card->u.x.hdlc_buf_status;
|
|
#endif
|
|
|
|
if (chan->common.usedby == API &&
|
|
atomic_read(&chan->common.command) &&
|
|
!card->u.x.LAPB_hdlc){
|
|
|
|
if (!(card->u.x.timer_int_enabled & TMR_INT_ENABLED_CMD_EXEC))
|
|
card->u.x.timer_int_enabled |= TMR_INT_ENABLED_CMD_EXEC;
|
|
|
|
if (!(status->imask & INTR_ON_TIMER))
|
|
status->imask |= INTR_ON_TIMER;
|
|
}
|
|
|
|
if ((chan->common.usedby == API) &&
|
|
atomic_read(&chan->common.disconnect)){
|
|
|
|
if (chan->common.state == WAN_DISCONNECTED){
|
|
atomic_set(&chan->common.disconnect,0);
|
|
return;
|
|
}
|
|
|
|
atomic_set(&chan->common.command,X25_CLEAR_CALL);
|
|
if (!(card->u.x.timer_int_enabled & TMR_INT_ENABLED_CMD_EXEC))
|
|
card->u.x.timer_int_enabled |= TMR_INT_ENABLED_CMD_EXEC;
|
|
|
|
if (!(status->imask & INTR_ON_TIMER))
|
|
status->imask |= INTR_ON_TIMER;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void timer_intr_exec(sdla_t *card, unsigned char TYPE)
|
|
{
|
|
TX25Status* status = card->flags;
|
|
card->u.x.timer_int_enabled |= TYPE;
|
|
if (!(status->imask & INTR_ON_TIMER))
|
|
status->imask |= INTR_ON_TIMER;
|
|
}
|
|
|
|
|
|
/*====================================================================
|
|
* SDLA Firmware-Specific Functions
|
|
*
|
|
* Almost all X.25 commands can unexpetedly fail due to so called 'X.25
|
|
* asynchronous events' such as restart, interrupt, incoming call request,
|
|
* call clear request, etc. They can't be ignored and have to be delt with
|
|
* immediately. To tackle with this problem we execute each interface
|
|
* command in a loop until good return code is received or maximum number
|
|
* of retries is reached. Each interface command returns non-zero return
|
|
* code, an asynchronous event/error handler x25_error() is called.
|
|
*====================================================================*/
|
|
|
|
/*====================================================================
|
|
* Read X.25 firmware version.
|
|
* Put code version as ASCII string in str.
|
|
*===================================================================*/
|
|
|
|
static int x25_get_version (sdla_t* card, char* str)
|
|
{
|
|
TX25Mbox* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
mbox->cmd.command = X25_READ_CODE_VERSION;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- &&
|
|
x25_error(card, err, X25_READ_CODE_VERSION, 0));
|
|
|
|
if (!err && str)
|
|
{
|
|
int len = mbox->cmd.length;
|
|
|
|
memcpy(str, mbox->data, len);
|
|
str[len] = '\0';
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/*====================================================================
|
|
* Configure adapter.
|
|
*===================================================================*/
|
|
|
|
static int x25_configure (sdla_t* card, TX25Config* conf)
|
|
{
|
|
TX25Mbox* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do{
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
memcpy(mbox->data, (void*)conf, sizeof(TX25Config));
|
|
mbox->cmd.length = sizeof(TX25Config);
|
|
mbox->cmd.command = X25_SET_CONFIGURATION;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && x25_error(card, err, X25_SET_CONFIGURATION, 0));
|
|
return err;
|
|
}
|
|
|
|
/*====================================================================
|
|
* Configure adapter for HDLC only.
|
|
*===================================================================*/
|
|
|
|
static int hdlc_configure (sdla_t* card, TX25Config* conf)
|
|
{
|
|
TX25Mbox* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do{
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
memcpy(mbox->data, (void*)conf, sizeof(TX25Config));
|
|
mbox->cmd.length = sizeof(TX25Config);
|
|
mbox->cmd.command = X25_HDLC_SET_CONFIG;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && x25_error(card, err, X25_SET_CONFIGURATION, 0));
|
|
|
|
return err;
|
|
}
|
|
|
|
static int set_hdlc_level (sdla_t* card)
|
|
{
|
|
|
|
TX25Mbox* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do{
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
mbox->cmd.command = SET_PROTOCOL_LEVEL;
|
|
mbox->cmd.length = 1;
|
|
mbox->data[0] = HDLC_LEVEL; //| DO_HDLC_LEVEL_ERROR_CHECKING;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && x25_error(card, err, SET_PROTOCOL_LEVEL, 0));
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
|
|
/*====================================================================
|
|
* Get communications error statistics.
|
|
*====================================================================*/
|
|
|
|
static int x25_get_err_stats (sdla_t* card)
|
|
{
|
|
TX25Mbox* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
mbox->cmd.command = X25_HDLC_READ_COMM_ERR;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && x25_error(card, err, X25_HDLC_READ_COMM_ERR, 0));
|
|
|
|
if (!err)
|
|
{
|
|
THdlcCommErr* stats = (void*)mbox->data;
|
|
|
|
card->wandev.stats.rx_over_errors = stats->rxOverrun;
|
|
card->wandev.stats.rx_crc_errors = stats->rxBadCrc;
|
|
card->wandev.stats.rx_missed_errors = stats->rxAborted;
|
|
card->wandev.stats.tx_aborted_errors = stats->txAborted;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/*====================================================================
|
|
* Get protocol statistics.
|
|
*===================================================================*/
|
|
|
|
static int x25_get_stats (sdla_t* card)
|
|
{
|
|
TX25Mbox* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
mbox->cmd.command = X25_READ_STATISTICS;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && x25_error(card, err, X25_READ_STATISTICS, 0)) ;
|
|
|
|
if (!err)
|
|
{
|
|
TX25Stats* stats = (void*)mbox->data;
|
|
|
|
card->wandev.stats.rx_packets = stats->rxData;
|
|
card->wandev.stats.tx_packets = stats->txData;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/*====================================================================
|
|
* Close HDLC link.
|
|
*===================================================================*/
|
|
|
|
static int x25_close_hdlc (sdla_t* card)
|
|
{
|
|
TX25Mbox* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
mbox->cmd.command = X25_HDLC_LINK_CLOSE;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && x25_error(card, err, X25_HDLC_LINK_CLOSE, 0));
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
/*====================================================================
|
|
* Open HDLC link.
|
|
*===================================================================*/
|
|
|
|
static int x25_open_hdlc (sdla_t* card)
|
|
{
|
|
TX25Mbox* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
mbox->cmd.command = X25_HDLC_LINK_OPEN;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && x25_error(card, err, X25_HDLC_LINK_OPEN, 0));
|
|
|
|
return err;
|
|
}
|
|
|
|
/*=====================================================================
|
|
* Setup HDLC link.
|
|
*====================================================================*/
|
|
static int x25_setup_hdlc (sdla_t* card)
|
|
{
|
|
TX25Mbox* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
mbox->cmd.command = X25_HDLC_LINK_SETUP;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && x25_error(card, err, X25_HDLC_LINK_SETUP, 0));
|
|
|
|
return err;
|
|
}
|
|
|
|
/*====================================================================
|
|
* Set (raise/drop) DTR.
|
|
*===================================================================*/
|
|
|
|
static int x25_set_dtr (sdla_t* card, int dtr)
|
|
{
|
|
TX25Mbox* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
mbox->data[0] = 0;
|
|
mbox->data[2] = 0;
|
|
mbox->data[1] = dtr ? 0x02 : 0x01;
|
|
mbox->cmd.length = 3;
|
|
mbox->cmd.command = X25_SET_GLOBAL_VARS;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && x25_error(card, err, X25_SET_GLOBAL_VARS, 0));
|
|
|
|
return err;
|
|
}
|
|
|
|
/*====================================================================
|
|
* Set interrupt mode.
|
|
*===================================================================*/
|
|
|
|
static int x25_set_intr_mode (sdla_t* card, int mode)
|
|
{
|
|
TX25Mbox* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
mbox->data[0] = mode;
|
|
if (card->hw.fwid == SFID_X25_508){
|
|
mbox->data[1] = card->hw.irq;
|
|
mbox->data[2] = 2;
|
|
mbox->cmd.length = 3;
|
|
}else {
|
|
mbox->cmd.length = 1;
|
|
}
|
|
mbox->cmd.command = X25_SET_INTERRUPT_MODE;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && x25_error(card, err, X25_SET_INTERRUPT_MODE, 0));
|
|
|
|
return err;
|
|
}
|
|
|
|
/*====================================================================
|
|
* Read X.25 channel configuration.
|
|
*===================================================================*/
|
|
|
|
static int x25_get_chan_conf (sdla_t* card, x25_channel_t* chan)
|
|
{
|
|
TX25Mbox* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int lcn = chan->common.lcn;
|
|
int err;
|
|
|
|
do{
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
mbox->cmd.lcn = lcn;
|
|
mbox->cmd.command = X25_READ_CHANNEL_CONFIG;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && x25_error(card, err, X25_READ_CHANNEL_CONFIG, lcn));
|
|
|
|
if (!err)
|
|
{
|
|
TX25Status* status = card->flags;
|
|
|
|
/* calculate an offset into the array of status bytes */
|
|
if (card->u.x.hi_svc <= X25_MAX_CHAN){
|
|
|
|
chan->ch_idx = lcn - 1;
|
|
|
|
}else{
|
|
int offset;
|
|
|
|
/* FIX: Apr 14 2000 : Nenad Corbic
|
|
* The data field was being compared to 0x1F using
|
|
* '&&' instead of '&'.
|
|
* This caused X25API to fail for LCNs greater than 255.
|
|
*/
|
|
switch (mbox->data[0] & 0x1F)
|
|
{
|
|
case 0x01:
|
|
offset = status->pvc_map; break;
|
|
case 0x03:
|
|
offset = status->icc_map; break;
|
|
case 0x07:
|
|
offset = status->twc_map; break;
|
|
case 0x0B:
|
|
offset = status->ogc_map; break;
|
|
default:
|
|
offset = 0;
|
|
}
|
|
chan->ch_idx = lcn - 1 - offset;
|
|
}
|
|
|
|
/* get actual transmit packet size on this channel */
|
|
switch(mbox->data[1] & 0x38)
|
|
{
|
|
case 0x00:
|
|
chan->tx_pkt_size = 16;
|
|
break;
|
|
case 0x08:
|
|
chan->tx_pkt_size = 32;
|
|
break;
|
|
case 0x10:
|
|
chan->tx_pkt_size = 64;
|
|
break;
|
|
case 0x18:
|
|
chan->tx_pkt_size = 128;
|
|
break;
|
|
case 0x20:
|
|
chan->tx_pkt_size = 256;
|
|
break;
|
|
case 0x28:
|
|
chan->tx_pkt_size = 512;
|
|
break;
|
|
case 0x30:
|
|
chan->tx_pkt_size = 1024;
|
|
break;
|
|
}
|
|
if (card->u.x.logging)
|
|
printk(KERN_INFO "%s: X.25 packet size on LCN %d is %d.\n",
|
|
card->devname, lcn, chan->tx_pkt_size);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/*====================================================================
|
|
* Place X.25 call.
|
|
*====================================================================*/
|
|
|
|
static int x25_place_call (sdla_t* card, x25_channel_t* chan)
|
|
{
|
|
TX25Mbox* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
char str[64];
|
|
|
|
|
|
if (chan->protocol == htons(ETH_P_IP)){
|
|
sprintf(str, "-d%s -uCC", chan->addr);
|
|
|
|
}else if (chan->protocol == htons(ETH_P_IPX)){
|
|
sprintf(str, "-d%s -u800000008137", chan->addr);
|
|
|
|
}
|
|
|
|
do
|
|
{
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
strcpy(mbox->data, str);
|
|
mbox->cmd.length = strlen(str);
|
|
mbox->cmd.command = X25_PLACE_CALL;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && x25_error(card, err, X25_PLACE_CALL, 0));
|
|
|
|
if (!err){
|
|
bind_lcn_to_dev (card, chan->dev, mbox->cmd.lcn);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/*====================================================================
|
|
* Accept X.25 call.
|
|
*====================================================================*/
|
|
|
|
static int x25_accept_call (sdla_t* card, int lcn, int qdm)
|
|
{
|
|
TX25Mbox* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
mbox->cmd.lcn = lcn;
|
|
mbox->cmd.qdm = qdm;
|
|
mbox->cmd.command = X25_ACCEPT_CALL;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && x25_error(card, err, X25_ACCEPT_CALL, lcn));
|
|
|
|
return err;
|
|
}
|
|
|
|
/*====================================================================
|
|
* Clear X.25 call.
|
|
*====================================================================*/
|
|
|
|
static int x25_clear_call (sdla_t* card, int lcn, int cause, int diagn)
|
|
{
|
|
TX25Mbox* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
mbox->cmd.lcn = lcn;
|
|
mbox->cmd.cause = cause;
|
|
mbox->cmd.diagn = diagn;
|
|
mbox->cmd.command = X25_CLEAR_CALL;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && x25_error(card, err, X25_CLEAR_CALL, lcn));
|
|
|
|
return err;
|
|
}
|
|
|
|
/*====================================================================
|
|
* Send X.25 data packet.
|
|
*====================================================================*/
|
|
|
|
static int x25_send (sdla_t* card, int lcn, int qdm, int len, void* buf)
|
|
{
|
|
TX25Mbox* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
unsigned char cmd;
|
|
|
|
if (card->u.x.LAPB_hdlc)
|
|
cmd = X25_HDLC_WRITE;
|
|
else
|
|
cmd = X25_WRITE;
|
|
|
|
do
|
|
{
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
memcpy(mbox->data, buf, len);
|
|
mbox->cmd.length = len;
|
|
mbox->cmd.lcn = lcn;
|
|
|
|
if (card->u.x.LAPB_hdlc){
|
|
mbox->cmd.pf = qdm;
|
|
}else{
|
|
mbox->cmd.qdm = qdm;
|
|
}
|
|
|
|
mbox->cmd.command = cmd;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && x25_error(card, err, cmd , lcn));
|
|
|
|
|
|
/* If buffers are busy the return code for LAPB HDLC is
|
|
* 1. The above functions are looking for return code
|
|
* of X25RES_NOT_READY if busy. */
|
|
|
|
if (card->u.x.LAPB_hdlc && err == 1){
|
|
err = X25RES_NOT_READY;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
/*====================================================================
|
|
* Fetch X.25 asynchronous events.
|
|
*===================================================================*/
|
|
|
|
static int x25_fetch_events (sdla_t* card)
|
|
{
|
|
TX25Status* status = card->flags;
|
|
TX25Mbox* mbox = card->mbox;
|
|
int err = 0;
|
|
|
|
if (status->gflags & 0x20)
|
|
{
|
|
memset(&mbox->cmd, 0, sizeof(TX25Cmd));
|
|
mbox->cmd.command = X25_IS_DATA_AVAILABLE;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
if (err) x25_error(card, err, X25_IS_DATA_AVAILABLE, 0);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/*====================================================================
|
|
* X.25 asynchronous event/error handler.
|
|
* This routine is called each time interface command returns
|
|
* non-zero return code to handle X.25 asynchronous events and
|
|
* common errors. Return non-zero to repeat command or zero to
|
|
* cancel it.
|
|
*
|
|
* Notes:
|
|
* 1. This function may be called recursively, as handling some of the
|
|
* asynchronous events (e.g. call request) requires execution of the
|
|
* interface command(s) that, in turn, may also return asynchronous
|
|
* events. To avoid re-entrancy problems we copy mailbox to dynamically
|
|
* allocated memory before processing events.
|
|
*====================================================================*/
|
|
|
|
static int x25_error (sdla_t* card, int err, int cmd, int lcn)
|
|
{
|
|
int retry = 1;
|
|
unsigned dlen = ((TX25Mbox*)card->mbox)->cmd.length;
|
|
TX25Mbox* mb;
|
|
|
|
mb = kmalloc(sizeof(TX25Mbox) + dlen, GFP_ATOMIC);
|
|
if (mb == NULL)
|
|
{
|
|
printk(KERN_ERR "%s: x25_error() out of memory!\n",
|
|
card->devname);
|
|
return 0;
|
|
}
|
|
memcpy(mb, card->mbox, sizeof(TX25Mbox) + dlen);
|
|
switch (err){
|
|
|
|
case X25RES_ASYNC_PACKET: /* X.25 asynchronous packet was received */
|
|
|
|
mb->data[dlen] = '\0';
|
|
|
|
switch (mb->cmd.pktType & 0x7F){
|
|
|
|
case ASE_CALL_RQST: /* incoming call */
|
|
retry = incoming_call(card, cmd, lcn, mb);
|
|
break;
|
|
|
|
case ASE_CALL_ACCEPTED: /* connected */
|
|
retry = call_accepted(card, cmd, lcn, mb);
|
|
break;
|
|
|
|
case ASE_CLEAR_RQST: /* call clear request */
|
|
retry = call_cleared(card, cmd, lcn, mb);
|
|
break;
|
|
|
|
case ASE_RESET_RQST: /* reset request */
|
|
printk(KERN_INFO "%s: X.25 reset request on LCN %d! "
|
|
"Cause:0x%02X Diagn:0x%02X\n",
|
|
card->devname, mb->cmd.lcn, mb->cmd.cause,
|
|
mb->cmd.diagn);
|
|
api_oob_event (card,mb);
|
|
break;
|
|
|
|
case ASE_RESTART_RQST: /* restart request */
|
|
retry = restart_event(card, cmd, lcn, mb);
|
|
break;
|
|
|
|
case ASE_CLEAR_CONFRM:
|
|
if (clear_confirm_event (card,mb))
|
|
break;
|
|
|
|
/* I use the goto statement here so if
|
|
* somebody inserts code between the
|
|
* case and default, we will not have
|
|
* ghost problems */
|
|
|
|
goto dflt_1;
|
|
|
|
default:
|
|
dflt_1:
|
|
printk(KERN_INFO "%s: X.25 event 0x%02X on LCN %d! "
|
|
"Cause:0x%02X Diagn:0x%02X\n",
|
|
card->devname, mb->cmd.pktType,
|
|
mb->cmd.lcn, mb->cmd.cause, mb->cmd.diagn);
|
|
}
|
|
break;
|
|
|
|
case X25RES_PROTO_VIOLATION: /* X.25 protocol violation indication */
|
|
|
|
/* Bug Fix: Mar 14 2000
|
|
* The Protocol violation error conditions were
|
|
* not handled previously */
|
|
|
|
switch (mb->cmd.pktType & 0x7F){
|
|
|
|
case PVE_CLEAR_RQST: /* Clear request */
|
|
retry = call_cleared(card, cmd, lcn, mb);
|
|
break;
|
|
|
|
case PVE_RESET_RQST: /* Reset request */
|
|
printk(KERN_INFO "%s: X.25 reset request on LCN %d! "
|
|
"Cause:0x%02X Diagn:0x%02X\n",
|
|
card->devname, mb->cmd.lcn, mb->cmd.cause,
|
|
mb->cmd.diagn);
|
|
api_oob_event (card,mb);
|
|
break;
|
|
|
|
case PVE_RESTART_RQST: /* Restart request */
|
|
retry = restart_event(card, cmd, lcn, mb);
|
|
break;
|
|
|
|
default :
|
|
printk(KERN_INFO
|
|
"%s: X.25 protocol violation on LCN %d! "
|
|
"Packet:0x%02X Cause:0x%02X Diagn:0x%02X\n",
|
|
card->devname, mb->cmd.lcn,
|
|
mb->cmd.pktType & 0x7F, mb->cmd.cause, mb->cmd.diagn);
|
|
api_oob_event(card,mb);
|
|
}
|
|
break;
|
|
|
|
case 0x42: /* X.25 timeout */
|
|
retry = timeout_event(card, cmd, lcn, mb);
|
|
break;
|
|
|
|
case 0x43: /* X.25 retry limit exceeded */
|
|
printk(KERN_INFO
|
|
"%s: exceeded X.25 retry limit on LCN %d! "
|
|
"Packet:0x%02X Diagn:0x%02X\n", card->devname,
|
|
mb->cmd.lcn, mb->cmd.pktType, mb->cmd.diagn)
|
|
;
|
|
break;
|
|
|
|
case 0x08: /* modem failure */
|
|
#ifndef MODEM_NOT_LOG
|
|
printk(KERN_INFO "%s: modem failure!\n", card->devname);
|
|
#endif /* MODEM_NOT_LOG */
|
|
api_oob_event(card,mb);
|
|
break;
|
|
|
|
case 0x09: /* N2 retry limit */
|
|
printk(KERN_INFO "%s: exceeded HDLC retry limit!\n",
|
|
card->devname);
|
|
api_oob_event(card,mb);
|
|
break;
|
|
|
|
case 0x06: /* unnumbered frame was received while in ABM */
|
|
printk(KERN_INFO "%s: received Unnumbered frame 0x%02X!\n",
|
|
card->devname, mb->data[0]);
|
|
api_oob_event(card,mb);
|
|
break;
|
|
|
|
case CMD_TIMEOUT:
|
|
printk(KERN_ERR "%s: command 0x%02X timed out!\n",
|
|
card->devname, cmd)
|
|
;
|
|
retry = 0; /* abort command */
|
|
break;
|
|
|
|
case X25RES_NOT_READY:
|
|
retry = 1;
|
|
break;
|
|
|
|
case 0x01:
|
|
if (card->u.x.LAPB_hdlc)
|
|
break;
|
|
|
|
if (mb->cmd.command == 0x16)
|
|
break;
|
|
/* I use the goto statement here so if
|
|
* somebody inserts code between the
|
|
* case and default, we will not have
|
|
* ghost problems */
|
|
goto dflt_2;
|
|
|
|
default:
|
|
dflt_2:
|
|
printk(KERN_INFO "%s: command 0x%02X returned 0x%02X! Lcn %i\n",
|
|
card->devname, cmd, err, mb->cmd.lcn)
|
|
;
|
|
retry = 0; /* abort command */
|
|
}
|
|
kfree(mb);
|
|
return retry;
|
|
}
|
|
|
|
/*====================================================================
|
|
* X.25 Asynchronous Event Handlers
|
|
* These functions are called by the x25_error() and should return 0, if
|
|
* the command resulting in the asynchronous event must be aborted.
|
|
*====================================================================*/
|
|
|
|
|
|
|
|
/*====================================================================
|
|
*Handle X.25 incoming call request.
|
|
* RFC 1356 establishes the following rules:
|
|
* 1. The first octet in the Call User Data (CUD) field of the call
|
|
* request packet contains NLPID identifying protocol encapsulation
|
|
* 2. Calls MUST NOT be accepted unless router supports requested
|
|
* protocol encapsulation.
|
|
* 3. A diagnostic code 249 defined by ISO/IEC 8208 may be used
|
|
* when clearing a call because protocol encapsulation is not
|
|
* supported.
|
|
* 4. If an incoming call is received while a call request is
|
|
* pending (i.e. call collision has occurred), the incoming call
|
|
* shall be rejected and call request shall be retried.
|
|
*====================================================================*/
|
|
|
|
static int incoming_call (sdla_t* card, int cmd, int lcn, TX25Mbox* mb)
|
|
{
|
|
struct wan_device* wandev = &card->wandev;
|
|
int new_lcn = mb->cmd.lcn;
|
|
struct net_device* dev = get_dev_by_lcn(wandev, new_lcn);
|
|
x25_channel_t* chan = NULL;
|
|
int accept = 0; /* set to '1' if o.k. to accept call */
|
|
unsigned int user_data;
|
|
x25_call_info_t* info;
|
|
|
|
/* Make sure there is no call collision */
|
|
if (dev != NULL)
|
|
{
|
|
printk(KERN_INFO
|
|
"%s: X.25 incoming call collision on LCN %d!\n",
|
|
card->devname, new_lcn);
|
|
|
|
x25_clear_call(card, new_lcn, 0, 0);
|
|
return 1;
|
|
}
|
|
|
|
/* Make sure D bit is not set in call request */
|
|
//FIXME: THIS IS NOT TURE !!!! TAKE IT OUT
|
|
// if (mb->cmd.qdm & 0x02)
|
|
// {
|
|
// printk(KERN_INFO
|
|
// "%s: X.25 incoming call on LCN %d with D-bit set!\n",
|
|
// card->devname, new_lcn);
|
|
//
|
|
// x25_clear_call(card, new_lcn, 0, 0);
|
|
// return 1;
|
|
// }
|
|
|
|
/* Parse call request data */
|
|
info = kmalloc(sizeof(x25_call_info_t), GFP_ATOMIC);
|
|
if (info == NULL)
|
|
{
|
|
printk(KERN_ERR
|
|
"%s: not enough memory to parse X.25 incoming call "
|
|
"on LCN %d!\n", card->devname, new_lcn);
|
|
x25_clear_call(card, new_lcn, 0, 0);
|
|
return 1;
|
|
}
|
|
|
|
parse_call_info(mb->data, info);
|
|
|
|
if (card->u.x.logging)
|
|
printk(KERN_INFO "\n%s: X.25 incoming call on LCN %d!\n",
|
|
card->devname, new_lcn);
|
|
|
|
/* Conver the first two ASCII characters into an
|
|
* interger. Used to check the incoming protocol
|
|
*/
|
|
user_data = hex_to_uint(info->user,2);
|
|
|
|
/* Find available channel */
|
|
for (dev = wandev->dev; dev; dev = *((struct net_device **)dev->priv)) {
|
|
chan = dev->priv;
|
|
|
|
if (chan->common.usedby == API)
|
|
continue;
|
|
|
|
if (!chan->common.svc || (chan->common.state != WAN_DISCONNECTED))
|
|
continue;
|
|
|
|
if (user_data == NLPID_IP && chan->protocol != htons(ETH_P_IP)){
|
|
printk(KERN_INFO "IP packet but configured for IPX : %x, %x\n",
|
|
htons(chan->protocol), info->user[0]);
|
|
continue;
|
|
}
|
|
|
|
if (user_data == NLPID_SNAP && chan->protocol != htons(ETH_P_IPX)){
|
|
printk(KERN_INFO "IPX packet but configured for IP: %x\n",
|
|
htons(chan->protocol));
|
|
continue;
|
|
}
|
|
if (strcmp(info->src, chan->addr) == 0)
|
|
break;
|
|
|
|
/* If just an '@' is specified, accept all incoming calls */
|
|
if (strcmp(chan->addr, "") == 0)
|
|
break;
|
|
}
|
|
|
|
if (dev == NULL){
|
|
|
|
/* If the call is not for any WANPIPE interfaces
|
|
* check to see if there is an API listening queue
|
|
* waiting for data. If there is send the packet
|
|
* up the stack.
|
|
*/
|
|
if (card->sk != NULL && card->func != NULL){
|
|
if (api_incoming_call(card,mb,new_lcn)){
|
|
x25_clear_call(card, new_lcn, 0, 0);
|
|
}
|
|
accept = 0;
|
|
}else{
|
|
printk(KERN_INFO "%s: no channels available!\n",
|
|
card->devname);
|
|
|
|
x25_clear_call(card, new_lcn, 0, 0);
|
|
}
|
|
|
|
}else if (info->nuser == 0){
|
|
|
|
printk(KERN_INFO
|
|
"%s: no user data in incoming call on LCN %d!\n",
|
|
card->devname, new_lcn)
|
|
;
|
|
x25_clear_call(card, new_lcn, 0, 0);
|
|
|
|
}else switch (info->user[0]){
|
|
|
|
case 0: /* multiplexed */
|
|
chan->protocol = htons(0);
|
|
accept = 1;
|
|
break;
|
|
|
|
case NLPID_IP: /* IP datagrams */
|
|
accept = 1;
|
|
break;
|
|
|
|
case NLPID_SNAP: /* IPX datagrams */
|
|
accept = 1;
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_INFO
|
|
"%s: unsupported NLPID 0x%02X in incoming call "
|
|
"on LCN %d!\n", card->devname, info->user[0], new_lcn);
|
|
x25_clear_call(card, new_lcn, 0, 249);
|
|
}
|
|
|
|
if (accept && (x25_accept_call(card, new_lcn, 0) == CMD_OK)){
|
|
|
|
bind_lcn_to_dev (card, chan->dev, new_lcn);
|
|
|
|
if (x25_get_chan_conf(card, chan) == CMD_OK)
|
|
set_chan_state(dev, WAN_CONNECTED);
|
|
else
|
|
x25_clear_call(card, new_lcn, 0, 0);
|
|
}
|
|
kfree(info);
|
|
return 1;
|
|
}
|
|
|
|
/*====================================================================
|
|
* Handle accepted call.
|
|
*====================================================================*/
|
|
|
|
static int call_accepted (sdla_t* card, int cmd, int lcn, TX25Mbox* mb)
|
|
{
|
|
unsigned new_lcn = mb->cmd.lcn;
|
|
struct net_device* dev = find_channel(card, new_lcn);
|
|
x25_channel_t* chan;
|
|
|
|
if (dev == NULL){
|
|
printk(KERN_INFO
|
|
"%s: clearing orphaned connection on LCN %d!\n",
|
|
card->devname, new_lcn);
|
|
x25_clear_call(card, new_lcn, 0, 0);
|
|
return 1;
|
|
}
|
|
|
|
if (card->u.x.logging)
|
|
printk(KERN_INFO "%s: X.25 call accepted on Dev %s and LCN %d!\n",
|
|
card->devname, dev->name, new_lcn);
|
|
|
|
/* Get channel configuration and notify router */
|
|
chan = dev->priv;
|
|
if (x25_get_chan_conf(card, chan) != CMD_OK)
|
|
{
|
|
x25_clear_call(card, new_lcn, 0, 0);
|
|
return 1;
|
|
}
|
|
|
|
set_chan_state(dev, WAN_CONNECTED);
|
|
|
|
if (chan->common.usedby == API){
|
|
send_delayed_cmd_result(card,dev,mb);
|
|
bind_lcn_to_dev (card, dev, new_lcn);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*====================================================================
|
|
* Handle cleared call.
|
|
*====================================================================*/
|
|
|
|
static int call_cleared (sdla_t* card, int cmd, int lcn, TX25Mbox* mb)
|
|
{
|
|
unsigned new_lcn = mb->cmd.lcn;
|
|
struct net_device* dev = find_channel(card, new_lcn);
|
|
x25_channel_t *chan;
|
|
unsigned char old_state;
|
|
|
|
if (card->u.x.logging){
|
|
printk(KERN_INFO "%s: X.25 clear request on LCN %d! Cause:0x%02X "
|
|
"Diagn:0x%02X\n",
|
|
card->devname, new_lcn, mb->cmd.cause, mb->cmd.diagn);
|
|
}
|
|
|
|
if (dev == NULL){
|
|
printk(KERN_INFO "%s: X.25 clear request : No device for clear\n",
|
|
card->devname);
|
|
return 1;
|
|
}
|
|
|
|
chan=dev->priv;
|
|
|
|
old_state = chan->common.state;
|
|
|
|
set_chan_state(dev, WAN_DISCONNECTED);
|
|
|
|
if (chan->common.usedby == API){
|
|
|
|
switch (old_state){
|
|
|
|
case WAN_CONNECTING:
|
|
send_delayed_cmd_result(card,dev,mb);
|
|
break;
|
|
case WAN_CONNECTED:
|
|
send_oob_msg(card,dev,mb);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ((cmd == X25_WRITE) && (lcn == new_lcn)) ? 0 : 1;
|
|
}
|
|
|
|
/*====================================================================
|
|
* Handle X.25 restart event.
|
|
*====================================================================*/
|
|
|
|
static int restart_event (sdla_t* card, int cmd, int lcn, TX25Mbox* mb)
|
|
{
|
|
struct wan_device* wandev = &card->wandev;
|
|
struct net_device* dev;
|
|
x25_channel_t *chan;
|
|
unsigned char old_state;
|
|
|
|
printk(KERN_INFO
|
|
"%s: X.25 restart request! Cause:0x%02X Diagn:0x%02X\n",
|
|
card->devname, mb->cmd.cause, mb->cmd.diagn);
|
|
|
|
/* down all logical channels */
|
|
for (dev = wandev->dev; dev; dev = *((struct net_device **)dev->priv)) {
|
|
chan=dev->priv;
|
|
old_state = chan->common.state;
|
|
|
|
set_chan_state(dev, WAN_DISCONNECTED);
|
|
|
|
if (chan->common.usedby == API){
|
|
switch (old_state){
|
|
|
|
case WAN_CONNECTING:
|
|
send_delayed_cmd_result(card,dev,mb);
|
|
break;
|
|
case WAN_CONNECTED:
|
|
send_oob_msg(card,dev,mb);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return (cmd == X25_WRITE) ? 0 : 1;
|
|
}
|
|
|
|
/*====================================================================
|
|
* Handle timeout event.
|
|
*====================================================================*/
|
|
|
|
static int timeout_event (sdla_t* card, int cmd, int lcn, TX25Mbox* mb)
|
|
{
|
|
unsigned new_lcn = mb->cmd.lcn;
|
|
|
|
if (mb->cmd.pktType == 0x05) /* call request time out */
|
|
{
|
|
struct net_device* dev = find_channel(card,new_lcn);
|
|
|
|
printk(KERN_INFO "%s: X.25 call timed timeout on LCN %d!\n",
|
|
card->devname, new_lcn);
|
|
|
|
if (dev){
|
|
x25_channel_t *chan = dev->priv;
|
|
set_chan_state(dev, WAN_DISCONNECTED);
|
|
|
|
if (chan->common.usedby == API){
|
|
send_delayed_cmd_result(card,dev,card->mbox);
|
|
}
|
|
}
|
|
}else{
|
|
printk(KERN_INFO "%s: X.25 packet 0x%02X timeout on LCN %d!\n",
|
|
card->devname, mb->cmd.pktType, new_lcn);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Miscellaneous
|
|
*/
|
|
|
|
/*====================================================================
|
|
* Establish physical connection.
|
|
* o open HDLC and raise DTR
|
|
*
|
|
* Return: 0 connection established
|
|
* 1 connection is in progress
|
|
* <0 error
|
|
*===================================================================*/
|
|
|
|
static int connect (sdla_t* card)
|
|
{
|
|
TX25Status* status = card->flags;
|
|
|
|
if (x25_open_hdlc(card) || x25_setup_hdlc(card))
|
|
return -EIO;
|
|
|
|
wanpipe_set_state(card, WAN_CONNECTING);
|
|
|
|
x25_set_intr_mode(card, INTR_ON_TIMER);
|
|
status->imask &= ~INTR_ON_TIMER;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Tear down physical connection.
|
|
* o close HDLC link
|
|
* o drop DTR
|
|
*
|
|
* Return: 0
|
|
* <0 error
|
|
*/
|
|
|
|
static int disconnect (sdla_t* card)
|
|
{
|
|
wanpipe_set_state(card, WAN_DISCONNECTED);
|
|
x25_set_intr_mode(card, INTR_ON_TIMER); /* disable all interrupt except timer */
|
|
x25_close_hdlc(card); /* close HDLC link */
|
|
x25_set_dtr(card, 0); /* drop DTR */
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Find network device by its channel number.
|
|
*/
|
|
|
|
static struct net_device* get_dev_by_lcn(struct wan_device* wandev,
|
|
unsigned lcn)
|
|
{
|
|
struct net_device* dev;
|
|
|
|
for (dev = wandev->dev; dev; dev = *((struct net_device **)dev->priv))
|
|
if (((x25_channel_t*)dev->priv)->common.lcn == lcn)
|
|
break;
|
|
return dev;
|
|
}
|
|
|
|
/*
|
|
* Initiate connection on the logical channel.
|
|
* o for PVC we just get channel configuration
|
|
* o for SVCs place an X.25 call
|
|
*
|
|
* Return: 0 connected
|
|
* >0 connection in progress
|
|
* <0 failure
|
|
*/
|
|
|
|
static int chan_connect(struct net_device* dev)
|
|
{
|
|
x25_channel_t* chan = dev->priv;
|
|
sdla_t* card = chan->card;
|
|
|
|
if (chan->common.svc && chan->common.usedby == WANPIPE){
|
|
if (!chan->addr[0]){
|
|
printk(KERN_INFO "%s: No Destination Address\n",
|
|
card->devname);
|
|
return -EINVAL; /* no destination address */
|
|
}
|
|
printk(KERN_INFO "%s: placing X.25 call to %s ...\n",
|
|
card->devname, chan->addr);
|
|
|
|
if (x25_place_call(card, chan) != CMD_OK)
|
|
return -EIO;
|
|
|
|
set_chan_state(dev, WAN_CONNECTING);
|
|
return 1;
|
|
}else{
|
|
if (x25_get_chan_conf(card, chan) != CMD_OK)
|
|
return -EIO;
|
|
|
|
set_chan_state(dev, WAN_CONNECTED);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Disconnect logical channel.
|
|
* o if SVC then clear X.25 call
|
|
*/
|
|
|
|
static int chan_disc(struct net_device* dev)
|
|
{
|
|
x25_channel_t* chan = dev->priv;
|
|
|
|
if (chan->common.svc){
|
|
x25_clear_call(chan->card, chan->common.lcn, 0, 0);
|
|
|
|
/* For API we disconnect on clear
|
|
* confirmation.
|
|
*/
|
|
if (chan->common.usedby == API)
|
|
return 0;
|
|
}
|
|
|
|
set_chan_state(dev, WAN_DISCONNECTED);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Set logical channel state.
|
|
*/
|
|
|
|
static void set_chan_state(struct net_device* dev, int state)
|
|
{
|
|
x25_channel_t* chan = dev->priv;
|
|
sdla_t* card = chan->card;
|
|
unsigned long flags;
|
|
|
|
save_flags(flags);
|
|
cli();
|
|
if (chan->common.state != state)
|
|
{
|
|
switch (state)
|
|
{
|
|
case WAN_CONNECTED:
|
|
if (card->u.x.logging){
|
|
printk (KERN_INFO
|
|
"%s: interface %s connected, lcn %i !\n",
|
|
card->devname, dev->name,chan->common.lcn);
|
|
}
|
|
*(unsigned short*)dev->dev_addr = htons(chan->common.lcn);
|
|
chan->i_timeout_sofar = jiffies;
|
|
|
|
/* LAPB is PVC Based */
|
|
if (card->u.x.LAPB_hdlc)
|
|
chan->common.svc=0;
|
|
break;
|
|
|
|
case WAN_CONNECTING:
|
|
if (card->u.x.logging){
|
|
printk (KERN_INFO
|
|
"%s: interface %s connecting, lcn %i ...\n",
|
|
card->devname, dev->name, chan->common.lcn);
|
|
}
|
|
break;
|
|
|
|
case WAN_DISCONNECTED:
|
|
if (card->u.x.logging){
|
|
printk (KERN_INFO
|
|
"%s: interface %s disconnected, lcn %i !\n",
|
|
card->devname, dev->name,chan->common.lcn);
|
|
}
|
|
atomic_set(&chan->common.disconnect,0);
|
|
|
|
if (chan->common.svc) {
|
|
*(unsigned short*)dev->dev_addr = 0;
|
|
card->u.x.svc_to_dev_map[(chan->common.lcn%X25_MAX_CHAN)]=NULL;
|
|
chan->common.lcn = 0;
|
|
}
|
|
|
|
if (chan->transmit_length){
|
|
chan->transmit_length=0;
|
|
atomic_set(&chan->common.driver_busy,0);
|
|
chan->tx_offset=0;
|
|
if (netif_queue_stopped(dev)){
|
|
netif_wake_queue(dev);
|
|
}
|
|
}
|
|
atomic_set(&chan->common.command,0);
|
|
break;
|
|
|
|
case WAN_DISCONNECTING:
|
|
if (card->u.x.logging){
|
|
printk (KERN_INFO
|
|
"\n%s: interface %s disconnecting, lcn %i ...\n",
|
|
card->devname, dev->name,chan->common.lcn);
|
|
}
|
|
atomic_set(&chan->common.disconnect,0);
|
|
break;
|
|
}
|
|
chan->common.state = state;
|
|
}
|
|
chan->state_tick = jiffies;
|
|
restore_flags(flags);
|
|
}
|
|
|
|
/*
|
|
* Send packet on a logical channel.
|
|
* When this function is called, tx_skb field of the channel data
|
|
* space points to the transmit socket buffer. When transmission
|
|
* is complete, release socket buffer and reset 'tbusy' flag.
|
|
*
|
|
* Return: 0 - transmission complete
|
|
* 1 - busy
|
|
*
|
|
* Notes:
|
|
* 1. If packet length is greater than MTU for this channel, we'll fragment
|
|
* the packet into 'complete sequence' using M-bit.
|
|
* 2. When transmission is complete, an event notification should be issued
|
|
* to the router.
|
|
*/
|
|
|
|
static int chan_send(struct net_device* dev, void* buff, unsigned data_len,
|
|
unsigned char tx_intr)
|
|
{
|
|
x25_channel_t* chan = dev->priv;
|
|
sdla_t* card = chan->card;
|
|
TX25Status* status = card->flags;
|
|
unsigned len=0, qdm=0, res=0, orig_len = 0;
|
|
void *data;
|
|
|
|
/* Check to see if channel is ready */
|
|
if ((!(status->cflags[chan->ch_idx] & 0x40) && !card->u.x.LAPB_hdlc) ||
|
|
!(*card->u.x.hdlc_buf_status & 0x40)){
|
|
|
|
if (!tx_intr){
|
|
setup_for_delayed_transmit (dev, buff, data_len);
|
|
return 0;
|
|
}else{
|
|
/* By returning 0 to tx_intr the packet will be dropped */
|
|
++card->wandev.stats.tx_dropped;
|
|
++chan->ifstats.tx_dropped;
|
|
printk(KERN_INFO "%s: ERROR, Tx intr could not send, dropping %s:\n",
|
|
card->devname,dev->name);
|
|
++chan->if_send_stat.if_send_bfr_not_passed_to_adptr;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (chan->common.usedby == API){
|
|
/* Remove the API Header */
|
|
x25api_hdr_t *api_data = (x25api_hdr_t *)buff;
|
|
|
|
/* Set the qdm bits from the packet header
|
|
* User has the option to set the qdm bits
|
|
*/
|
|
qdm = api_data->qdm;
|
|
|
|
orig_len = len = data_len - sizeof(x25api_hdr_t);
|
|
data = (unsigned char*)buff + sizeof(x25api_hdr_t);
|
|
}else{
|
|
data = buff;
|
|
orig_len = len = data_len;
|
|
}
|
|
|
|
if (tx_intr){
|
|
/* We are in tx_intr, minus the tx_offset from
|
|
* the total length. The tx_offset part of the
|
|
* data has already been sent. Also, move the
|
|
* data pointer to proper offset location.
|
|
*/
|
|
len -= chan->tx_offset;
|
|
data = (unsigned char*)data + chan->tx_offset;
|
|
}
|
|
|
|
/* Check if the packet length is greater than MTU
|
|
* If YES: Cut the len to MTU and set the M bit
|
|
*/
|
|
if (len > chan->tx_pkt_size && !card->u.x.LAPB_hdlc){
|
|
len = chan->tx_pkt_size;
|
|
qdm |= M_BIT;
|
|
}
|
|
|
|
|
|
/* Pass only first three bits of the qdm byte to the send
|
|
* routine. In case user sets any other bit which might
|
|
* cause errors.
|
|
*/
|
|
|
|
switch(x25_send(card, chan->common.lcn, (qdm&0x07), len, data)){
|
|
case 0x00: /* success */
|
|
chan->i_timeout_sofar = jiffies;
|
|
|
|
dev->trans_start=jiffies;
|
|
|
|
if ((qdm & M_BIT) && !card->u.x.LAPB_hdlc){
|
|
if (!tx_intr){
|
|
/* The M bit was set, which means that part of the
|
|
* packet has been sent. Copy the packet into a buffer
|
|
* and set the offset to len, so on next tx_inter
|
|
* the packet will be sent using the below offset.
|
|
*/
|
|
chan->tx_offset += len;
|
|
|
|
++chan->ifstats.tx_packets;
|
|
chan->ifstats.tx_bytes += len;
|
|
|
|
if (chan->tx_offset < orig_len){
|
|
setup_for_delayed_transmit (dev, buff, data_len);
|
|
}
|
|
res=0;
|
|
}else{
|
|
/* We are already in tx_inter, thus data is already
|
|
* in the buffer. Update the offset and wait for
|
|
* next tx_intr. We add on to the offset, since data can
|
|
* be X number of times larger than max data size.
|
|
*/
|
|
++chan->ifstats.tx_packets;
|
|
chan->ifstats.tx_bytes += len;
|
|
|
|
++chan->if_send_stat.if_send_bfr_passed_to_adptr;
|
|
chan->tx_offset += len;
|
|
|
|
/* The user can set the qdm bit as well.
|
|
* If the entire packet was sent and qdm is still
|
|
* set, than it's the user who has set the M bit. In that,
|
|
* case indicate that the packet was send by returning
|
|
* 0 and wait for a new packet. Otherwise, wait for next
|
|
* tx interrupt to send the rest of the packet */
|
|
|
|
if (chan->tx_offset < orig_len){
|
|
res=1;
|
|
}else{
|
|
res=0;
|
|
}
|
|
}
|
|
}else{
|
|
++chan->ifstats.tx_packets;
|
|
chan->ifstats.tx_bytes += len;
|
|
++chan->if_send_stat.if_send_bfr_passed_to_adptr;
|
|
res=0;
|
|
}
|
|
break;
|
|
|
|
case 0x33: /* Tx busy */
|
|
if (tx_intr){
|
|
printk(KERN_INFO "%s: Tx_intr: Big Error dropping packet %s\n",
|
|
card->devname,dev->name);
|
|
++chan->ifstats.tx_dropped;
|
|
++card->wandev.stats.tx_dropped;
|
|
++chan->if_send_stat.if_send_bfr_not_passed_to_adptr;
|
|
res=0;
|
|
}else{
|
|
DBG_PRINTK(KERN_INFO
|
|
"%s: Send: Big Error should have tx: storring %s\n",
|
|
card->devname,dev->name);
|
|
setup_for_delayed_transmit (dev, buff, data_len);
|
|
res=1;
|
|
}
|
|
break;
|
|
|
|
default: /* failure */
|
|
++chan->ifstats.tx_errors;
|
|
if (tx_intr){
|
|
printk(KERN_INFO "%s: Tx_intr: Failure to send, dropping %s\n",
|
|
card->devname,dev->name);
|
|
++chan->ifstats.tx_dropped;
|
|
++card->wandev.stats.tx_dropped;
|
|
++chan->if_send_stat.if_send_bfr_not_passed_to_adptr;
|
|
res=0;
|
|
}else{
|
|
DBG_PRINTK(KERN_INFO "%s: Send: Failure to send !!!, storing %s\n",
|
|
card->devname,dev->name);
|
|
setup_for_delayed_transmit (dev, buff, data_len);
|
|
res=1;
|
|
}
|
|
break;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
|
|
/*
|
|
* Parse X.25 call request data and fill x25_call_info_t structure.
|
|
*/
|
|
|
|
static void parse_call_info (unsigned char* str, x25_call_info_t* info)
|
|
{
|
|
memset(info, 0, sizeof(x25_call_info_t));
|
|
for (; *str; ++str)
|
|
{
|
|
int i;
|
|
unsigned char ch;
|
|
|
|
if (*str == '-') switch (str[1]) {
|
|
|
|
/* Take minus 2 off the maximum size so that
|
|
* last byte is 0. This way we can use string
|
|
* manipulaton functions on call information.
|
|
*/
|
|
|
|
case 'd': /* destination address */
|
|
for (i = 0; i < (MAX_X25_ADDR_SIZE-2); ++i){
|
|
ch = str[2+i];
|
|
if (isspace(ch)) break;
|
|
info->dest[i] = ch;
|
|
}
|
|
break;
|
|
|
|
case 's': /* source address */
|
|
for (i = 0; i < (MAX_X25_ADDR_SIZE-2); ++i){
|
|
ch = str[2+i];
|
|
if (isspace(ch)) break;
|
|
info->src[i] = ch;
|
|
}
|
|
break;
|
|
|
|
case 'u': /* user data */
|
|
for (i = 0; i < (MAX_X25_DATA_SIZE-2); ++i){
|
|
ch = str[2+i];
|
|
if (isspace(ch)) break;
|
|
info->user[i] = ch;
|
|
}
|
|
info->nuser = i;
|
|
break;
|
|
|
|
case 'f': /* facilities */
|
|
for (i = 0; i < (MAX_X25_FACL_SIZE-2); ++i){
|
|
ch = str[2+i];
|
|
if (isspace(ch)) break;
|
|
info->facil[i] = ch;
|
|
}
|
|
info->nfacil = i;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Convert line speed in bps to a number used by S502 code.
|
|
*/
|
|
|
|
static unsigned char bps_to_speed_code (unsigned long bps)
|
|
{
|
|
unsigned char number;
|
|
|
|
if (bps <= 1200) number = 0x01;
|
|
else if (bps <= 2400) number = 0x02;
|
|
else if (bps <= 4800) number = 0x03;
|
|
else if (bps <= 9600) number = 0x04;
|
|
else if (bps <= 19200) number = 0x05;
|
|
else if (bps <= 38400) number = 0x06;
|
|
else if (bps <= 45000) number = 0x07;
|
|
else if (bps <= 56000) number = 0x08;
|
|
else if (bps <= 64000) number = 0x09;
|
|
else if (bps <= 74000) number = 0x0A;
|
|
else if (bps <= 112000) number = 0x0B;
|
|
else if (bps <= 128000) number = 0x0C;
|
|
else number = 0x0D;
|
|
|
|
return number;
|
|
}
|
|
|
|
/*
|
|
* Convert decimal string to unsigned integer.
|
|
* If len != 0 then only 'len' characters of the string are converted.
|
|
*/
|
|
|
|
static unsigned int dec_to_uint (unsigned char* str, int len)
|
|
{
|
|
unsigned val;
|
|
|
|
if (!len)
|
|
len = strlen(str);
|
|
|
|
for (val = 0; len && is_digit(*str); ++str, --len)
|
|
val = (val * 10) + (*str - (unsigned)'0');
|
|
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* Convert hex string to unsigned integer.
|
|
* If len != 0 then only 'len' characters of the string are conferted.
|
|
*/
|
|
|
|
static unsigned int hex_to_uint (unsigned char* str, int len)
|
|
{
|
|
unsigned val, ch;
|
|
|
|
if (!len)
|
|
len = strlen(str);
|
|
|
|
for (val = 0; len; ++str, --len)
|
|
{
|
|
ch = *str;
|
|
if (is_digit(ch))
|
|
val = (val << 4) + (ch - (unsigned)'0');
|
|
else if (is_hex_digit(ch))
|
|
val = (val << 4) + ((ch & 0xDF) - (unsigned)'A' + 10);
|
|
else break;
|
|
}
|
|
return val;
|
|
}
|
|
|
|
|
|
static int handle_IPXWAN(unsigned char *sendpacket, char *devname, unsigned char enable_IPX, unsigned long network_number, unsigned short proto)
|
|
{
|
|
int i;
|
|
|
|
if( proto == ETH_P_IPX) {
|
|
/* It's an IPX packet */
|
|
if(!enable_IPX) {
|
|
/* Return 1 so we don't pass it up the stack. */
|
|
return 1;
|
|
}
|
|
} else {
|
|
/* It's not IPX so pass it up the stack.*/
|
|
return 0;
|
|
}
|
|
|
|
if( sendpacket[16] == 0x90 &&
|
|
sendpacket[17] == 0x04)
|
|
{
|
|
/* It's IPXWAN */
|
|
|
|
if( sendpacket[2] == 0x02 &&
|
|
sendpacket[34] == 0x00)
|
|
{
|
|
/* It's a timer request packet */
|
|
printk(KERN_INFO "%s: Received IPXWAN Timer Request packet\n",devname);
|
|
|
|
/* Go through the routing options and answer no to every
|
|
* option except Unnumbered RIP/SAP
|
|
*/
|
|
for(i = 41; sendpacket[i] == 0x00; i += 5)
|
|
{
|
|
/* 0x02 is the option for Unnumbered RIP/SAP */
|
|
if( sendpacket[i + 4] != 0x02)
|
|
{
|
|
sendpacket[i + 1] = 0;
|
|
}
|
|
}
|
|
|
|
/* Skip over the extended Node ID option */
|
|
if( sendpacket[i] == 0x04 )
|
|
{
|
|
i += 8;
|
|
}
|
|
|
|
/* We also want to turn off all header compression opt. */
|
|
for(; sendpacket[i] == 0x80 ;)
|
|
{
|
|
sendpacket[i + 1] = 0;
|
|
i += (sendpacket[i + 2] << 8) + (sendpacket[i + 3]) + 4;
|
|
}
|
|
|
|
/* Set the packet type to timer response */
|
|
sendpacket[34] = 0x01;
|
|
|
|
printk(KERN_INFO "%s: Sending IPXWAN Timer Response\n",devname);
|
|
}
|
|
else if( sendpacket[34] == 0x02 )
|
|
{
|
|
/* This is an information request packet */
|
|
printk(KERN_INFO "%s: Received IPXWAN Information Request packet\n",devname);
|
|
|
|
/* Set the packet type to information response */
|
|
sendpacket[34] = 0x03;
|
|
|
|
/* Set the router name */
|
|
sendpacket[51] = 'X';
|
|
sendpacket[52] = 'T';
|
|
sendpacket[53] = 'P';
|
|
sendpacket[54] = 'I';
|
|
sendpacket[55] = 'P';
|
|
sendpacket[56] = 'E';
|
|
sendpacket[57] = '-';
|
|
sendpacket[58] = CVHexToAscii(network_number >> 28);
|
|
sendpacket[59] = CVHexToAscii((network_number & 0x0F000000)>> 24);
|
|
sendpacket[60] = CVHexToAscii((network_number & 0x00F00000)>> 20);
|
|
sendpacket[61] = CVHexToAscii((network_number & 0x000F0000)>> 16);
|
|
sendpacket[62] = CVHexToAscii((network_number & 0x0000F000)>> 12);
|
|
sendpacket[63] = CVHexToAscii((network_number & 0x00000F00)>> 8);
|
|
sendpacket[64] = CVHexToAscii((network_number & 0x000000F0)>> 4);
|
|
sendpacket[65] = CVHexToAscii(network_number & 0x0000000F);
|
|
for(i = 66; i < 99; i+= 1)
|
|
{
|
|
sendpacket[i] = 0;
|
|
}
|
|
|
|
printk(KERN_INFO "%s: Sending IPXWAN Information Response packet\n",devname);
|
|
}
|
|
else
|
|
{
|
|
printk(KERN_INFO "%s: Unknown IPXWAN packet!\n",devname);
|
|
return 0;
|
|
}
|
|
|
|
/* Set the WNodeID to our network address */
|
|
sendpacket[35] = (unsigned char)(network_number >> 24);
|
|
sendpacket[36] = (unsigned char)((network_number & 0x00FF0000) >> 16);
|
|
sendpacket[37] = (unsigned char)((network_number & 0x0000FF00) >> 8);
|
|
sendpacket[38] = (unsigned char)(network_number & 0x000000FF);
|
|
|
|
return 1;
|
|
} else {
|
|
/*If we get here it's an IPX-data packet, so it'll get passed up the stack.
|
|
*/
|
|
/* switch the network numbers */
|
|
switch_net_numbers(sendpacket, network_number, 1);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If incoming is 0 (outgoing)- if the net numbers is ours make it 0
|
|
* if incoming is 1 - if the net number is 0 make it ours
|
|
*/
|
|
|
|
static void switch_net_numbers(unsigned char *sendpacket, unsigned long network_number, unsigned char incoming)
|
|
{
|
|
unsigned long pnetwork_number;
|
|
|
|
pnetwork_number = (unsigned long)((sendpacket[6] << 24) +
|
|
(sendpacket[7] << 16) + (sendpacket[8] << 8) +
|
|
sendpacket[9]);
|
|
|
|
|
|
if (!incoming) {
|
|
/*If the destination network number is ours, make it 0 */
|
|
if( pnetwork_number == network_number) {
|
|
sendpacket[6] = sendpacket[7] = sendpacket[8] =
|
|
sendpacket[9] = 0x00;
|
|
}
|
|
} else {
|
|
/* If the incoming network is 0, make it ours */
|
|
if( pnetwork_number == 0) {
|
|
sendpacket[6] = (unsigned char)(network_number >> 24);
|
|
sendpacket[7] = (unsigned char)((network_number &
|
|
0x00FF0000) >> 16);
|
|
sendpacket[8] = (unsigned char)((network_number &
|
|
0x0000FF00) >> 8);
|
|
sendpacket[9] = (unsigned char)(network_number &
|
|
0x000000FF);
|
|
}
|
|
}
|
|
|
|
|
|
pnetwork_number = (unsigned long)((sendpacket[18] << 24) +
|
|
(sendpacket[19] << 16) + (sendpacket[20] << 8) +
|
|
sendpacket[21]);
|
|
|
|
|
|
if( !incoming ) {
|
|
/* If the source network is ours, make it 0 */
|
|
if( pnetwork_number == network_number) {
|
|
sendpacket[18] = sendpacket[19] = sendpacket[20] =
|
|
sendpacket[21] = 0x00;
|
|
}
|
|
} else {
|
|
/* If the source network is 0, make it ours */
|
|
if( pnetwork_number == 0 ) {
|
|
sendpacket[18] = (unsigned char)(network_number >> 24);
|
|
sendpacket[19] = (unsigned char)((network_number &
|
|
0x00FF0000) >> 16);
|
|
sendpacket[20] = (unsigned char)((network_number &
|
|
0x0000FF00) >> 8);
|
|
sendpacket[21] = (unsigned char)(network_number &
|
|
0x000000FF);
|
|
}
|
|
}
|
|
} /* switch_net_numbers */
|
|
|
|
|
|
|
|
|
|
/********************* X25API SPECIFIC FUNCTIONS ****************/
|
|
|
|
|
|
/*===============================================================
|
|
* find_channel
|
|
*
|
|
* Manages the lcn to device map. It increases performance
|
|
* because it eliminates the need to search through the link
|
|
* list for a device which is bounded to a specific lcn.
|
|
*
|
|
*===============================================================*/
|
|
|
|
|
|
struct net_device *find_channel(sdla_t *card, unsigned lcn)
|
|
{
|
|
if (card->u.x.LAPB_hdlc){
|
|
|
|
return card->wandev.dev;
|
|
|
|
}else{
|
|
/* We don't know whether the incoming lcn
|
|
* is a PVC or an SVC channel. But we do know that
|
|
* the lcn cannot be for both the PVC and the SVC
|
|
* channel.
|
|
|
|
* If the lcn number is greater or equal to 255,
|
|
* take the modulo 255 of that number. We only have
|
|
* 255 locations, thus higher numbers must be mapped
|
|
* to a number between 0 and 245.
|
|
|
|
* We must separate pvc's and svc's since two don't
|
|
* have to be contiguous. Meaning pvc's can start
|
|
* from 1 to 10 and svc's can start from 256 to 266.
|
|
* But 256%255 is 1, i.e. CONFLICT.
|
|
*/
|
|
|
|
|
|
/* Highest LCN number must be less or equal to 4096 */
|
|
if ((lcn <= MAX_LCN_NUM) && (lcn > 0)){
|
|
|
|
if (lcn < X25_MAX_CHAN){
|
|
if (card->u.x.svc_to_dev_map[lcn])
|
|
return card->u.x.svc_to_dev_map[lcn];
|
|
|
|
if (card->u.x.pvc_to_dev_map[lcn])
|
|
return card->u.x.pvc_to_dev_map[lcn];
|
|
|
|
}else{
|
|
int new_lcn = lcn%X25_MAX_CHAN;
|
|
if (card->u.x.svc_to_dev_map[new_lcn])
|
|
return card->u.x.svc_to_dev_map[new_lcn];
|
|
|
|
if (card->u.x.pvc_to_dev_map[new_lcn])
|
|
return card->u.x.pvc_to_dev_map[new_lcn];
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
void bind_lcn_to_dev(sdla_t *card, struct net_device *dev, unsigned lcn)
|
|
{
|
|
x25_channel_t *chan = dev->priv;
|
|
|
|
/* Modulo the lcn number by X25_MAX_CHAN (255)
|
|
* because the lcn number can be greater than 255
|
|
*
|
|
* We need to split svc and pvc since they don't have
|
|
* to be contigous.
|
|
*/
|
|
|
|
if (chan->common.svc){
|
|
card->u.x.svc_to_dev_map[(lcn % X25_MAX_CHAN)] = dev;
|
|
}else{
|
|
card->u.x.pvc_to_dev_map[(lcn % X25_MAX_CHAN)] = dev;
|
|
}
|
|
chan->common.lcn = lcn;
|
|
}
|
|
|
|
|
|
|
|
/*===============================================================
|
|
* x25api_bh
|
|
*
|
|
*
|
|
*==============================================================*/
|
|
|
|
static void x25api_bh(struct net_device* dev)
|
|
{
|
|
x25_channel_t* chan = dev->priv;
|
|
sdla_t* card = chan->card;
|
|
struct sk_buff *skb;
|
|
|
|
if (atomic_read(&chan->bh_buff_used) == 0){
|
|
printk(KERN_INFO "%s: BH Buffer Empty in BH\n",
|
|
card->devname);
|
|
clear_bit(0, &chan->tq_working);
|
|
return;
|
|
}
|
|
|
|
while (atomic_read(&chan->bh_buff_used)){
|
|
|
|
/* If the sock is in the process of unlinking the
|
|
* driver from the socket, we must get out.
|
|
* This never happends but is a sanity check. */
|
|
if (test_bit(0,&chan->common.common_critical)){
|
|
clear_bit(0, &chan->tq_working);
|
|
return;
|
|
}
|
|
|
|
/* If LAPB HDLC, do not drop packets if socket is
|
|
* not connected. Let the buffer fill up and
|
|
* turn off rx interrupt */
|
|
if (card->u.x.LAPB_hdlc){
|
|
if (chan->common.sk == NULL || chan->common.func == NULL){
|
|
clear_bit(0, &chan->tq_working);
|
|
return;
|
|
}
|
|
}
|
|
|
|
skb = ((bh_data_t *)&chan->bh_head[chan->bh_read])->skb;
|
|
|
|
if (skb == NULL){
|
|
printk(KERN_INFO "%s: BH Skb empty for read %i\n",
|
|
card->devname,chan->bh_read);
|
|
}else{
|
|
|
|
if (chan->common.sk == NULL || chan->common.func == NULL){
|
|
printk(KERN_INFO "%s: BH: Socket disconnected, dropping\n",
|
|
card->devname);
|
|
dev_kfree_skb_any(skb);
|
|
x25api_bh_cleanup(dev);
|
|
++chan->ifstats.rx_dropped;
|
|
++chan->rx_intr_stat.rx_intr_bfr_not_passed_to_stack;
|
|
continue;
|
|
}
|
|
|
|
|
|
if (chan->common.func(skb,dev,chan->common.sk) != 0){
|
|
/* Sock full cannot send, queue us for another
|
|
* try
|
|
*/
|
|
printk(KERN_INFO "%s: BH: !!! Packet failed to send !!!!! \n",
|
|
card->devname);
|
|
atomic_set(&chan->common.receive_block,1);
|
|
return;
|
|
}else{
|
|
x25api_bh_cleanup(dev);
|
|
++chan->rx_intr_stat.rx_intr_bfr_passed_to_stack;
|
|
}
|
|
}
|
|
}
|
|
clear_bit(0, &chan->tq_working);
|
|
|
|
return;
|
|
}
|
|
|
|
/*===============================================================
|
|
* x25api_bh_cleanup
|
|
*
|
|
*
|
|
*==============================================================*/
|
|
|
|
static int x25api_bh_cleanup(struct net_device *dev)
|
|
{
|
|
x25_channel_t* chan = dev->priv;
|
|
sdla_t *card = chan->card;
|
|
TX25Status* status = card->flags;
|
|
|
|
|
|
((bh_data_t *)&chan->bh_head[chan->bh_read])->skb = NULL;
|
|
|
|
if (chan->bh_read == MAX_BH_BUFF){
|
|
chan->bh_read=0;
|
|
}else{
|
|
++chan->bh_read;
|
|
}
|
|
|
|
/* If the Receive interrupt was off, it means
|
|
* that we filled up our circular buffer. Check
|
|
* that we have space in the buffer. If so
|
|
* turn the RX interrupt back on.
|
|
*/
|
|
if (!(status->imask & INTR_ON_RX_FRAME)){
|
|
if (atomic_read(&chan->bh_buff_used) < (MAX_BH_BUFF+1)){
|
|
printk(KERN_INFO "%s: BH: Turning on the interrupt\n",
|
|
card->devname);
|
|
status->imask |= INTR_ON_RX_FRAME;
|
|
}
|
|
}
|
|
|
|
atomic_dec(&chan->bh_buff_used);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*===============================================================
|
|
* bh_enqueue
|
|
*
|
|
*
|
|
*==============================================================*/
|
|
|
|
static int bh_enqueue(struct net_device *dev, struct sk_buff *skb)
|
|
{
|
|
x25_channel_t* chan = dev->priv;
|
|
sdla_t *card = chan->card;
|
|
TX25Status* status = card->flags;
|
|
|
|
if (atomic_read(&chan->bh_buff_used) == (MAX_BH_BUFF+1)){
|
|
printk(KERN_INFO "%s: Bottom half buffer FULL\n",
|
|
card->devname);
|
|
return 1;
|
|
}
|
|
|
|
((bh_data_t *)&chan->bh_head[chan->bh_write])->skb = skb;
|
|
|
|
if (chan->bh_write == MAX_BH_BUFF){
|
|
chan->bh_write=0;
|
|
}else{
|
|
++chan->bh_write;
|
|
}
|
|
|
|
atomic_inc(&chan->bh_buff_used);
|
|
|
|
if (atomic_read(&chan->bh_buff_used) == (MAX_BH_BUFF+1)){
|
|
printk(KERN_INFO "%s: Buffer is now full, Turning off RX Intr\n",
|
|
card->devname);
|
|
status->imask &= ~INTR_ON_RX_FRAME;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*===============================================================
|
|
* timer_intr_cmd_exec
|
|
*
|
|
* Called by timer interrupt to execute a command
|
|
*===============================================================*/
|
|
|
|
static int timer_intr_cmd_exec (sdla_t* card)
|
|
{
|
|
struct net_device *dev;
|
|
unsigned char more_to_exec=0;
|
|
volatile x25_channel_t *chan=NULL;
|
|
int i=0,bad_cmd=0,err=0;
|
|
|
|
if (card->u.x.cmd_dev == NULL){
|
|
card->u.x.cmd_dev = card->wandev.dev;
|
|
}
|
|
|
|
dev = card->u.x.cmd_dev;
|
|
|
|
for (;;){
|
|
|
|
chan = dev->priv;
|
|
|
|
if (atomic_read(&chan->common.command)){
|
|
|
|
bad_cmd = check_bad_command(card,dev);
|
|
|
|
if ((!chan->common.mbox || atomic_read(&chan->common.disconnect)) &&
|
|
!bad_cmd){
|
|
|
|
/* Socket has died or exited, We must bring the
|
|
* channel down before anybody else tries to
|
|
* use it */
|
|
err = channel_disconnect(card,dev);
|
|
}else{
|
|
err = execute_delayed_cmd(card, dev,
|
|
(mbox_cmd_t*)chan->common.mbox,
|
|
bad_cmd);
|
|
}
|
|
|
|
switch (err){
|
|
|
|
case RETURN_RESULT:
|
|
|
|
/* Return the result to the socket without
|
|
* delay. NO_WAIT Command */
|
|
atomic_set(&chan->common.command,0);
|
|
if (atomic_read(&card->u.x.command_busy))
|
|
atomic_set(&card->u.x.command_busy,0);
|
|
|
|
send_delayed_cmd_result(card,dev,card->mbox);
|
|
|
|
more_to_exec=0;
|
|
break;
|
|
case DELAY_RESULT:
|
|
|
|
/* Wait for the remote to respond, before
|
|
* sending the result up to the socket.
|
|
* WAIT command */
|
|
if (atomic_read(&card->u.x.command_busy))
|
|
atomic_set(&card->u.x.command_busy,0);
|
|
|
|
atomic_set(&chan->common.command,0);
|
|
more_to_exec=0;
|
|
break;
|
|
default:
|
|
|
|
/* If command could not be executed for
|
|
* some reason (i.e return code 0x33 busy)
|
|
* set the more_to_exec bit which will
|
|
* indicate that this command must be exectued
|
|
* again during next timer interrupt
|
|
*/
|
|
more_to_exec=1;
|
|
if (atomic_read(&card->u.x.command_busy) == 0)
|
|
atomic_set(&card->u.x.command_busy,1);
|
|
break;
|
|
}
|
|
|
|
bad_cmd=0;
|
|
|
|
/* If flags is set, there are no hdlc buffers,
|
|
* thus, wait for the next pass and try the
|
|
* same command again. Otherwise, start searching
|
|
* from next device on the next pass.
|
|
*/
|
|
if (!more_to_exec){
|
|
dev = move_dev_to_next(card,dev);
|
|
}
|
|
break;
|
|
}else{
|
|
/* This device has nothing to execute,
|
|
* go to next.
|
|
*/
|
|
if (atomic_read(&card->u.x.command_busy))
|
|
atomic_set(&card->u.x.command_busy,0);
|
|
dev = move_dev_to_next(card,dev);
|
|
}
|
|
|
|
if (++i == card->u.x.no_dev){
|
|
if (!more_to_exec){
|
|
DBG_PRINTK(KERN_INFO "%s: Nothing to execute in Timer\n",
|
|
card->devname);
|
|
if (atomic_read(&card->u.x.command_busy)){
|
|
atomic_set(&card->u.x.command_busy,0);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
} //End of FOR
|
|
|
|
card->u.x.cmd_dev = dev;
|
|
|
|
if (more_to_exec){
|
|
/* If more commands are pending, do not turn off timer
|
|
* interrupt */
|
|
return 1;
|
|
}else{
|
|
/* No more commands, turn off timer interrupt */
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*===============================================================
|
|
* execute_delayed_cmd
|
|
*
|
|
* Execute an API command which was passed down from the
|
|
* sock. Sock is very limited in which commands it can
|
|
* execute. Wait and No Wait commands are supported.
|
|
* Place Call, Clear Call and Reset wait commands, where
|
|
* Accept Call is a no_wait command.
|
|
*
|
|
*===============================================================*/
|
|
|
|
static int execute_delayed_cmd(sdla_t* card, struct net_device *dev,
|
|
mbox_cmd_t *usr_cmd, char bad_cmd)
|
|
{
|
|
TX25Mbox* mbox = card->mbox;
|
|
int err;
|
|
x25_channel_t *chan = dev->priv;
|
|
int delay=RETURN_RESULT;
|
|
|
|
if (!(*card->u.x.hdlc_buf_status & 0x40) && !bad_cmd){
|
|
return TRY_CMD_AGAIN;
|
|
}
|
|
|
|
/* This way a command is guaranteed to be executed for
|
|
* a specific lcn, the network interface is bound to. */
|
|
usr_cmd->cmd.lcn = chan->common.lcn;
|
|
|
|
|
|
/* If channel is pvc, instead of place call
|
|
* run x25_channel configuration. If running LAPB HDLC
|
|
* enable communications.
|
|
*/
|
|
if ((!chan->common.svc) && (usr_cmd->cmd.command == X25_PLACE_CALL)){
|
|
|
|
if (card->u.x.LAPB_hdlc){
|
|
DBG_PRINTK(KERN_INFO "LAPB: Connecting\n");
|
|
connect(card);
|
|
set_chan_state(dev,WAN_CONNECTING);
|
|
return DELAY_RESULT;
|
|
}else{
|
|
DBG_PRINTK(KERN_INFO "%s: PVC is CONNECTING\n",card->devname);
|
|
if (x25_get_chan_conf(card, chan) == CMD_OK){
|
|
set_chan_state(dev, WAN_CONNECTED);
|
|
}else{
|
|
set_chan_state(dev, WAN_DISCONNECTED);
|
|
}
|
|
return RETURN_RESULT;
|
|
}
|
|
}
|
|
|
|
/* Copy the socket mbox command onto the board */
|
|
|
|
memcpy(&mbox->cmd, &usr_cmd->cmd, sizeof(TX25Cmd));
|
|
if (usr_cmd->cmd.length){
|
|
memcpy(mbox->data, usr_cmd->data, usr_cmd->cmd.length);
|
|
}
|
|
|
|
/* Check if command is bad. We need to copy the cmd into
|
|
* the buffer regardless since we return the, mbox to
|
|
* the user */
|
|
if (bad_cmd){
|
|
mbox->cmd.result=0x01;
|
|
return RETURN_RESULT;
|
|
}
|
|
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
|
|
if (err != CMD_OK && err != X25RES_NOT_READY)
|
|
x25_error(card, err, usr_cmd->cmd.command, usr_cmd->cmd.lcn);
|
|
|
|
if (mbox->cmd.result == X25RES_NOT_READY){
|
|
return TRY_CMD_AGAIN;
|
|
}
|
|
|
|
switch (mbox->cmd.command){
|
|
|
|
case X25_PLACE_CALL:
|
|
|
|
switch (mbox->cmd.result){
|
|
|
|
case CMD_OK:
|
|
|
|
/* Check if Place call is a wait command or a
|
|
* no wait command */
|
|
if (atomic_read(&chan->common.command) & 0x80)
|
|
delay=RETURN_RESULT;
|
|
else
|
|
delay=DELAY_RESULT;
|
|
|
|
|
|
DBG_PRINTK(KERN_INFO "\n%s: PLACE CALL Binding dev %s to lcn %i\n",
|
|
card->devname,dev->name, mbox->cmd.lcn);
|
|
|
|
bind_lcn_to_dev (card, dev, mbox->cmd.lcn);
|
|
set_chan_state(dev, WAN_CONNECTING);
|
|
break;
|
|
|
|
|
|
default:
|
|
delay=RETURN_RESULT;
|
|
set_chan_state(dev, WAN_DISCONNECTED);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case X25_ACCEPT_CALL:
|
|
|
|
switch (mbox->cmd.result){
|
|
|
|
case CMD_OK:
|
|
|
|
DBG_PRINTK(KERN_INFO "\n%s: ACCEPT Binding dev %s to lcn %i\n",
|
|
card->devname,dev->name,mbox->cmd.lcn);
|
|
|
|
bind_lcn_to_dev (card, dev, mbox->cmd.lcn);
|
|
|
|
if (x25_get_chan_conf(card, chan) == CMD_OK){
|
|
|
|
set_chan_state(dev, WAN_CONNECTED);
|
|
delay=RETURN_RESULT;
|
|
|
|
}else{
|
|
if (x25_clear_call(card, usr_cmd->cmd.lcn, 0, 0) == CMD_OK){
|
|
/* if clear is successful, wait for clear confirm
|
|
*/
|
|
delay=DELAY_RESULT;
|
|
}else{
|
|
/* Do not change the state here. If we fail
|
|
* the accept the return code is send up
|
|
*the stack, which will ether retry
|
|
* or clear the call
|
|
*/
|
|
DBG_PRINTK(KERN_INFO
|
|
"%s: ACCEPT: STATE MAY BE CURRUPTED 2 !!!!!\n",
|
|
card->devname);
|
|
delay=RETURN_RESULT;
|
|
}
|
|
}
|
|
break;
|
|
|
|
|
|
case X25RES_ASYNC_PACKET:
|
|
delay=TRY_CMD_AGAIN;
|
|
break;
|
|
|
|
default:
|
|
DBG_PRINTK(KERN_INFO "%s: ACCEPT FAILED\n",card->devname);
|
|
if (x25_clear_call(card, usr_cmd->cmd.lcn, 0, 0) == CMD_OK){
|
|
delay=DELAY_RESULT;
|
|
}else{
|
|
/* Do not change the state here. If we fail the accept. The
|
|
* return code is send up the stack, which will ether retry
|
|
* or clear the call */
|
|
DBG_PRINTK(KERN_INFO
|
|
"%s: ACCEPT: STATE MAY BE CORRUPTED 1 !!!!!\n",
|
|
card->devname);
|
|
delay=RETURN_RESULT;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case X25_CLEAR_CALL:
|
|
|
|
switch (mbox->cmd.result){
|
|
|
|
case CMD_OK:
|
|
DBG_PRINTK(KERN_INFO
|
|
"CALL CLEAR OK: Dev %s Mbox Lcn %i Chan Lcn %i\n",
|
|
dev->name,mbox->cmd.lcn,chan->common.lcn);
|
|
set_chan_state(dev, WAN_DISCONNECTING);
|
|
delay = DELAY_RESULT;
|
|
break;
|
|
|
|
case X25RES_CHANNEL_IN_USE:
|
|
case X25RES_ASYNC_PACKET:
|
|
delay = TRY_CMD_AGAIN;
|
|
break;
|
|
|
|
case X25RES_LINK_NOT_IN_ABM:
|
|
case X25RES_INVAL_LCN:
|
|
case X25RES_INVAL_STATE:
|
|
set_chan_state(dev, WAN_DISCONNECTED);
|
|
delay = RETURN_RESULT;
|
|
break;
|
|
|
|
default:
|
|
/* If command did not execute because of user
|
|
* fault, do not change the state. This will
|
|
* signal the socket that clear command failed.
|
|
* User can retry or close the socket.
|
|
* When socket gets killed, it will set the
|
|
* chan->disconnect which will signal
|
|
* driver to clear the call */
|
|
printk(KERN_INFO "%s: Clear Command Failed, Rc %x\n",
|
|
card->devname,mbox->cmd.command);
|
|
delay = RETURN_RESULT;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return delay;
|
|
}
|
|
|
|
/*===============================================================
|
|
* api_incoming_call
|
|
*
|
|
* Pass an incoming call request up the listening
|
|
* sock. If the API sock is not listening reject the
|
|
* call.
|
|
*
|
|
*===============================================================*/
|
|
|
|
static int api_incoming_call (sdla_t* card, TX25Mbox *mbox, int lcn)
|
|
{
|
|
struct sk_buff *skb;
|
|
int len = sizeof(TX25Cmd)+mbox->cmd.length;
|
|
|
|
if (alloc_and_init_skb_buf(card, &skb, len)){
|
|
printk(KERN_INFO "%s: API incoming call, no memory\n",card->devname);
|
|
return 1;
|
|
}
|
|
|
|
memcpy(skb_put(skb,len),&mbox->cmd,len);
|
|
|
|
skb->mac.raw = skb->data;
|
|
skb->protocol = htons(X25_PROT);
|
|
skb->pkt_type = WAN_PACKET_ASYNC;
|
|
|
|
if (card->func(skb,card->sk) < 0){
|
|
printk(KERN_INFO "%s: MAJOR ERROR: Failed to send up place call \n",card->devname);
|
|
dev_kfree_skb_any(skb);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*===============================================================
|
|
* send_delayed_cmd_result
|
|
*
|
|
* Wait commands like PLEACE CALL or CLEAR CALL must wait
|
|
* until the result arrives. This function passes
|
|
* the result to a waiting sock.
|
|
*
|
|
*===============================================================*/
|
|
static void send_delayed_cmd_result(sdla_t *card, struct net_device *dev,
|
|
TX25Mbox* mbox)
|
|
{
|
|
x25_channel_t *chan = dev->priv;
|
|
mbox_cmd_t *usr_cmd = (mbox_cmd_t *)chan->common.mbox;
|
|
struct sk_buff *skb;
|
|
int len=sizeof(unsigned char);
|
|
|
|
atomic_set(&chan->common.command,0);
|
|
|
|
/* If the sock is in the process of unlinking the
|
|
* driver from the socket, we must get out.
|
|
* This never happends but is a sanity check. */
|
|
if (test_bit(0,&chan->common.common_critical)){
|
|
return;
|
|
}
|
|
|
|
if (!usr_cmd || !chan->common.sk || !chan->common.func){
|
|
DBG_PRINTK(KERN_INFO "Delay result: Sock not bounded sk: %u, func: %u, mbox: %u\n",
|
|
(unsigned int)chan->common.sk,
|
|
(unsigned int)chan->common.func,
|
|
(unsigned int)usr_cmd);
|
|
return;
|
|
}
|
|
|
|
memcpy(&usr_cmd->cmd, &mbox->cmd, sizeof(TX25Cmd));
|
|
if (mbox->cmd.length > 0){
|
|
memcpy(usr_cmd->data, mbox->data, mbox->cmd.length);
|
|
}
|
|
|
|
if (alloc_and_init_skb_buf(card,&skb,len)){
|
|
printk(KERN_INFO "Delay result: No sock buffers\n");
|
|
return;
|
|
}
|
|
|
|
memcpy(skb_put(skb,len),&mbox->cmd.command,len);
|
|
|
|
skb->mac.raw = skb->data;
|
|
skb->pkt_type = WAN_PACKET_CMD;
|
|
|
|
chan->common.func(skb,dev,chan->common.sk);
|
|
}
|
|
|
|
/*===============================================================
|
|
* clear_confirm_event
|
|
*
|
|
* Pass the clear confirmation event up the sock. The
|
|
* API will disconnect only after the clear confirmation
|
|
* has been received.
|
|
*
|
|
* Depending on the state, clear confirmation could
|
|
* be an OOB event, or a result of an API command.
|
|
*===============================================================*/
|
|
|
|
static int clear_confirm_event (sdla_t *card, TX25Mbox* mb)
|
|
{
|
|
struct net_device *dev;
|
|
x25_channel_t *chan;
|
|
unsigned char old_state;
|
|
|
|
dev = find_channel(card,mb->cmd.lcn);
|
|
if (!dev){
|
|
DBG_PRINTK(KERN_INFO "%s: *** GOT CLEAR BUT NO DEV %i\n",
|
|
card->devname,mb->cmd.lcn);
|
|
return 0;
|
|
}
|
|
|
|
chan=dev->priv;
|
|
DBG_PRINTK(KERN_INFO "%s: GOT CLEAR CONFIRM %s: Mbox lcn %i Chan lcn %i\n",
|
|
card->devname, dev->name, mb->cmd.lcn, chan->common.lcn);
|
|
|
|
/* If not API fall through to default.
|
|
* If API, send the result to a waiting
|
|
* socket.
|
|
*/
|
|
|
|
old_state = chan->common.state;
|
|
set_chan_state(dev, WAN_DISCONNECTED);
|
|
|
|
if (chan->common.usedby == API){
|
|
switch (old_state) {
|
|
|
|
case WAN_DISCONNECTING:
|
|
case WAN_CONNECTING:
|
|
send_delayed_cmd_result(card,dev,mb);
|
|
break;
|
|
case WAN_CONNECTED:
|
|
send_oob_msg(card,dev,mb);
|
|
break;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*===============================================================
|
|
* send_oob_msg
|
|
*
|
|
* Construct an NEM Message and pass it up the connected
|
|
* sock. If the sock is not bounded discard the NEM.
|
|
*
|
|
*===============================================================*/
|
|
|
|
static void send_oob_msg(sdla_t *card, struct net_device *dev, TX25Mbox *mbox)
|
|
{
|
|
x25_channel_t *chan = dev->priv;
|
|
mbox_cmd_t *usr_cmd = (mbox_cmd_t *)chan->common.mbox;
|
|
struct sk_buff *skb;
|
|
int len=sizeof(x25api_hdr_t)+mbox->cmd.length;
|
|
x25api_t *api_hdr;
|
|
|
|
/* If the sock is in the process of unlinking the
|
|
* driver from the socket, we must get out.
|
|
* This never happends but is a sanity check. */
|
|
if (test_bit(0,&chan->common.common_critical)){
|
|
return;
|
|
}
|
|
|
|
if (!usr_cmd || !chan->common.sk || !chan->common.func){
|
|
DBG_PRINTK(KERN_INFO "OOB MSG: Sock not bounded\n");
|
|
return;
|
|
}
|
|
|
|
memcpy(&usr_cmd->cmd, &mbox->cmd, sizeof(TX25Cmd));
|
|
if (mbox->cmd.length > 0){
|
|
memcpy(usr_cmd->data, mbox->data, mbox->cmd.length);
|
|
}
|
|
|
|
if (alloc_and_init_skb_buf(card,&skb,len)){
|
|
printk(KERN_INFO "%s: OOB MSG: No sock buffers\n",card->devname);
|
|
return;
|
|
}
|
|
|
|
api_hdr = (x25api_t*)skb_put(skb,len);
|
|
api_hdr->hdr.pktType = mbox->cmd.pktType & 0x7F;
|
|
api_hdr->hdr.qdm = mbox->cmd.qdm;
|
|
api_hdr->hdr.cause = mbox->cmd.cause;
|
|
api_hdr->hdr.diagn = mbox->cmd.diagn;
|
|
api_hdr->hdr.length = mbox->cmd.length;
|
|
api_hdr->hdr.result = mbox->cmd.result;
|
|
api_hdr->hdr.lcn = mbox->cmd.lcn;
|
|
|
|
if (mbox->cmd.length > 0){
|
|
memcpy(api_hdr->data,mbox->data,mbox->cmd.length);
|
|
}
|
|
|
|
skb->mac.raw = skb->data;
|
|
skb->pkt_type = WAN_PACKET_ERR;
|
|
|
|
if (chan->common.func(skb,dev,chan->common.sk) < 0){
|
|
if (bh_enqueue(dev,skb)){
|
|
printk(KERN_INFO "%s: Dropping OOB MSG\n",card->devname);
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
}
|
|
|
|
DBG_PRINTK(KERN_INFO "%s: OOB MSG OK, %s, lcn %i\n",
|
|
card->devname, dev->name, mbox->cmd.lcn);
|
|
}
|
|
|
|
/*===============================================================
|
|
* alloc_and_init_skb_buf
|
|
*
|
|
* Allocate and initialize an skb buffer.
|
|
*
|
|
*===============================================================*/
|
|
|
|
static int alloc_and_init_skb_buf (sdla_t *card, struct sk_buff **skb, int len)
|
|
{
|
|
struct sk_buff *new_skb = *skb;
|
|
|
|
new_skb = dev_alloc_skb(len + X25_HRDHDR_SZ);
|
|
if (new_skb == NULL){
|
|
printk(KERN_INFO "%s: no socket buffers available!\n",
|
|
card->devname);
|
|
return 1;
|
|
}
|
|
|
|
if (skb_tailroom(new_skb) < len){
|
|
/* No room for the packet. Call off the whole thing! */
|
|
dev_kfree_skb_any(new_skb);
|
|
printk(KERN_INFO "%s: Listen: unexpectedly long packet sequence\n"
|
|
,card->devname);
|
|
*skb = NULL;
|
|
return 1;
|
|
}
|
|
|
|
*skb = new_skb;
|
|
return 0;
|
|
|
|
}
|
|
|
|
/*===============================================================
|
|
* api_oob_event
|
|
*
|
|
* Send an OOB event up to the sock
|
|
*
|
|
*===============================================================*/
|
|
|
|
static void api_oob_event (sdla_t *card,TX25Mbox *mbox)
|
|
{
|
|
struct net_device *dev = find_channel(card, mbox->cmd.lcn);
|
|
x25_channel_t *chan;
|
|
|
|
if (!dev)
|
|
return;
|
|
|
|
chan=dev->priv;
|
|
|
|
if (chan->common.usedby == API)
|
|
send_oob_msg(card,dev,mbox);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int channel_disconnect(sdla_t* card, struct net_device *dev)
|
|
{
|
|
|
|
int err;
|
|
x25_channel_t *chan = dev->priv;
|
|
|
|
DBG_PRINTK(KERN_INFO "%s: TIMER: %s, Device down disconnecting\n",
|
|
card->devname,dev->name);
|
|
|
|
if (chan->common.svc){
|
|
err = x25_clear_call(card,chan->common.lcn,0,0);
|
|
}else{
|
|
/* If channel is PVC or LAPB HDLC, there is no call
|
|
* to be cleared, thus drop down to the default
|
|
* area
|
|
*/
|
|
err = 1;
|
|
}
|
|
|
|
switch (err){
|
|
|
|
case X25RES_CHANNEL_IN_USE:
|
|
case X25RES_NOT_READY:
|
|
err = TRY_CMD_AGAIN;
|
|
break;
|
|
case CMD_OK:
|
|
DBG_PRINTK(KERN_INFO "CALL CLEAR OK: Dev %s Chan Lcn %i\n",
|
|
dev->name,chan->common.lcn);
|
|
|
|
set_chan_state(dev,WAN_DISCONNECTING);
|
|
atomic_set(&chan->common.command,0);
|
|
err = DELAY_RESULT;
|
|
break;
|
|
default:
|
|
/* If LAPB HDLC protocol, bring the whole link down
|
|
* once the application terminates
|
|
*/
|
|
|
|
set_chan_state(dev,WAN_DISCONNECTED);
|
|
|
|
if (card->u.x.LAPB_hdlc){
|
|
DBG_PRINTK(KERN_INFO "LAPB: Disconnecting Link\n");
|
|
hdlc_link_down (card);
|
|
}
|
|
atomic_set(&chan->common.command,0);
|
|
err = RETURN_RESULT;
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static void hdlc_link_down (sdla_t *card)
|
|
{
|
|
TX25Mbox* mbox = card->mbox;
|
|
int retry = 5;
|
|
int err=0;
|
|
|
|
do {
|
|
memset(mbox,0,sizeof(TX25Mbox));
|
|
mbox->cmd.command = X25_HDLC_LINK_DISC;
|
|
mbox->cmd.length = 1;
|
|
mbox->data[0]=0;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
|
|
} while (err && retry-- && x25_error(card, err, X25_HDLC_LINK_DISC, 0));
|
|
|
|
if (err)
|
|
printk(KERN_INFO "%s: Hdlc Link Down Failed %x\n",card->devname,err);
|
|
|
|
disconnect (card);
|
|
|
|
}
|
|
|
|
static int check_bad_command(sdla_t* card, struct net_device *dev)
|
|
{
|
|
x25_channel_t *chan = dev->priv;
|
|
int bad_cmd = 0;
|
|
|
|
switch (atomic_read(&chan->common.command)&0x7F){
|
|
|
|
case X25_PLACE_CALL:
|
|
if (chan->common.state != WAN_DISCONNECTED)
|
|
bad_cmd=1;
|
|
break;
|
|
case X25_CLEAR_CALL:
|
|
if (chan->common.state == WAN_DISCONNECTED)
|
|
bad_cmd=1;
|
|
break;
|
|
case X25_ACCEPT_CALL:
|
|
if (chan->common.state != WAN_CONNECTING)
|
|
bad_cmd=1;
|
|
break;
|
|
case X25_RESET:
|
|
if (chan->common.state != WAN_CONNECTED)
|
|
bad_cmd=1;
|
|
break;
|
|
default:
|
|
bad_cmd=1;
|
|
break;
|
|
}
|
|
|
|
if (bad_cmd){
|
|
printk(KERN_INFO "%s: Invalid State, BAD Command %x, dev %s, lcn %i, st %i\n",
|
|
card->devname,atomic_read(&chan->common.command),dev->name,
|
|
chan->common.lcn, chan->common.state);
|
|
}
|
|
|
|
return bad_cmd;
|
|
}
|
|
|
|
|
|
|
|
/*************************** XPIPEMON FUNCTIONS **************************/
|
|
|
|
/*==============================================================================
|
|
* Process UDP call of type XPIPE
|
|
*/
|
|
|
|
static int process_udp_mgmt_pkt(sdla_t *card)
|
|
{
|
|
int c_retry = MAX_CMD_RETRY;
|
|
unsigned int len;
|
|
struct sk_buff *new_skb;
|
|
TX25Mbox *mbox = card->mbox;
|
|
int err;
|
|
int udp_mgmt_req_valid = 1;
|
|
struct net_device *dev;
|
|
x25_channel_t *chan;
|
|
unsigned short lcn;
|
|
struct timeval tv;
|
|
|
|
|
|
x25_udp_pkt_t *x25_udp_pkt;
|
|
x25_udp_pkt = (x25_udp_pkt_t *)card->u.x.udp_pkt_data;
|
|
|
|
dev = card->u.x.udp_dev;
|
|
chan = dev->priv;
|
|
lcn = chan->common.lcn;
|
|
|
|
switch(x25_udp_pkt->cblock.command) {
|
|
|
|
/* XPIPE_ENABLE_TRACE */
|
|
case XPIPE_ENABLE_TRACING:
|
|
|
|
/* XPIPE_GET_TRACE_INFO */
|
|
case XPIPE_GET_TRACE_INFO:
|
|
|
|
/* SET FT1 MODE */
|
|
case XPIPE_SET_FT1_MODE:
|
|
|
|
if(card->u.x.udp_pkt_src == UDP_PKT_FRM_NETWORK) {
|
|
++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_direction_err;
|
|
udp_mgmt_req_valid = 0;
|
|
break;
|
|
}
|
|
|
|
/* XPIPE_FT1_READ_STATUS */
|
|
case XPIPE_FT1_READ_STATUS:
|
|
|
|
/* FT1 MONITOR STATUS */
|
|
case XPIPE_FT1_STATUS_CTRL:
|
|
if(card->hw.fwid != SFID_X25_508) {
|
|
++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_type_err;
|
|
udp_mgmt_req_valid = 0;
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if(!udp_mgmt_req_valid) {
|
|
/* set length to 0 */
|
|
x25_udp_pkt->cblock.length = 0;
|
|
/* set return code */
|
|
x25_udp_pkt->cblock.result = (card->hw.fwid != SFID_X25_508) ? 0x1F : 0xCD;
|
|
|
|
} else {
|
|
|
|
switch (x25_udp_pkt->cblock.command) {
|
|
|
|
|
|
case XPIPE_FLUSH_DRIVER_STATS:
|
|
init_x25_channel_struct(chan);
|
|
init_global_statistics(card);
|
|
mbox->cmd.length = 0;
|
|
break;
|
|
|
|
|
|
case XPIPE_DRIVER_STAT_IFSEND:
|
|
memcpy(x25_udp_pkt->data, &chan->if_send_stat, sizeof(if_send_stat_t));
|
|
mbox->cmd.length = sizeof(if_send_stat_t);
|
|
x25_udp_pkt->cblock.length = mbox->cmd.length;
|
|
break;
|
|
|
|
case XPIPE_DRIVER_STAT_INTR:
|
|
memcpy(&x25_udp_pkt->data[0], &card->statistics, sizeof(global_stats_t));
|
|
memcpy(&x25_udp_pkt->data[sizeof(global_stats_t)],
|
|
&chan->rx_intr_stat, sizeof(rx_intr_stat_t));
|
|
|
|
mbox->cmd.length = sizeof(global_stats_t) +
|
|
sizeof(rx_intr_stat_t);
|
|
x25_udp_pkt->cblock.length = mbox->cmd.length;
|
|
break;
|
|
|
|
case XPIPE_DRIVER_STAT_GEN:
|
|
memcpy(x25_udp_pkt->data,
|
|
&chan->pipe_mgmt_stat.UDP_PIPE_mgmt_kmalloc_err,
|
|
sizeof(pipe_mgmt_stat_t));
|
|
|
|
memcpy(&x25_udp_pkt->data[sizeof(pipe_mgmt_stat_t)],
|
|
&card->statistics, sizeof(global_stats_t));
|
|
|
|
x25_udp_pkt->cblock.result = 0;
|
|
x25_udp_pkt->cblock.length = sizeof(global_stats_t)+
|
|
sizeof(rx_intr_stat_t);
|
|
mbox->cmd.length = x25_udp_pkt->cblock.length;
|
|
break;
|
|
|
|
case XPIPE_ROUTER_UP_TIME:
|
|
do_gettimeofday(&tv);
|
|
chan->router_up_time = tv.tv_sec - chan->router_start_time;
|
|
*(unsigned long *)&x25_udp_pkt->data = chan->router_up_time;
|
|
x25_udp_pkt->cblock.length = mbox->cmd.length = 4;
|
|
x25_udp_pkt->cblock.result = 0;
|
|
break;
|
|
|
|
default :
|
|
|
|
do {
|
|
memcpy(&mbox->cmd, &x25_udp_pkt->cblock.command, sizeof(TX25Cmd));
|
|
if(mbox->cmd.length){
|
|
memcpy(&mbox->data,
|
|
(char *)x25_udp_pkt->data,
|
|
mbox->cmd.length);
|
|
}
|
|
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && c_retry-- && x25_error(card, err, mbox->cmd.command, 0));
|
|
|
|
|
|
if ( err == CMD_OK ||
|
|
(err == 1 &&
|
|
(mbox->cmd.command == 0x06 ||
|
|
mbox->cmd.command == 0x16) ) ){
|
|
|
|
++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_cmnd_OK;
|
|
} else {
|
|
++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_cmnd_timeout;
|
|
}
|
|
|
|
/* copy the result back to our buffer */
|
|
memcpy(&x25_udp_pkt->cblock.command, &mbox->cmd, sizeof(TX25Cmd));
|
|
|
|
if(mbox->cmd.length) {
|
|
memcpy(&x25_udp_pkt->data, &mbox->data, mbox->cmd.length);
|
|
}
|
|
break;
|
|
|
|
} //switch
|
|
|
|
}
|
|
|
|
/* Fill UDP TTL */
|
|
|
|
x25_udp_pkt->ip_pkt.ttl = card->wandev.ttl;
|
|
len = reply_udp(card->u.x.udp_pkt_data, mbox->cmd.length);
|
|
|
|
|
|
if(card->u.x.udp_pkt_src == UDP_PKT_FRM_NETWORK) {
|
|
|
|
err = x25_send(card, lcn, 0, len, card->u.x.udp_pkt_data);
|
|
if (!err)
|
|
++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_send_passed;
|
|
else
|
|
++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_send_failed;
|
|
|
|
} else {
|
|
|
|
/* Allocate socket buffer */
|
|
if((new_skb = dev_alloc_skb(len)) != NULL) {
|
|
void *buf;
|
|
|
|
/* copy data into new_skb */
|
|
buf = skb_put(new_skb, len);
|
|
memcpy(buf, card->u.x.udp_pkt_data, len);
|
|
|
|
/* Decapsulate packet and pass it up the protocol
|
|
stack */
|
|
new_skb->dev = dev;
|
|
|
|
if (chan->common.usedby == API)
|
|
new_skb->protocol = htons(X25_PROT);
|
|
else
|
|
new_skb->protocol = htons(ETH_P_IP);
|
|
|
|
new_skb->mac.raw = new_skb->data;
|
|
|
|
netif_rx(new_skb);
|
|
++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_passed_to_stack;
|
|
|
|
} else {
|
|
++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_no_socket;
|
|
printk(KERN_INFO
|
|
"%s: UDP mgmt cmnd, no socket buffers available!\n",
|
|
card->devname);
|
|
}
|
|
}
|
|
|
|
card->u.x.udp_pkt_lgth = 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
/*==============================================================================
|
|
* Determine what type of UDP call it is. DRVSTATS or XPIPE8ND ?
|
|
*/
|
|
static int udp_pkt_type( struct sk_buff *skb, sdla_t* card )
|
|
{
|
|
x25_udp_pkt_t *x25_udp_pkt = (x25_udp_pkt_t *)skb->data;
|
|
|
|
if((x25_udp_pkt->ip_pkt.protocol == UDPMGMT_UDP_PROTOCOL) &&
|
|
(x25_udp_pkt->ip_pkt.ver_inet_hdr_length == 0x45) &&
|
|
(x25_udp_pkt->udp_pkt.udp_dst_port == ntohs(card->wandev.udp_port)) &&
|
|
(x25_udp_pkt->wp_mgmt.request_reply == UDPMGMT_REQUEST)) {
|
|
|
|
if(!strncmp(x25_udp_pkt->wp_mgmt.signature,
|
|
UDPMGMT_XPIPE_SIGNATURE, 8)){
|
|
return UDP_XPIPE_TYPE;
|
|
}else{
|
|
printk(KERN_INFO "%s: UDP Packet, Failed Signature !\n",
|
|
card->devname);
|
|
}
|
|
}
|
|
|
|
return UDP_INVALID_TYPE;
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* Reply to UDP Management system.
|
|
* Return nothing.
|
|
*/
|
|
static int reply_udp( unsigned char *data, unsigned int mbox_len )
|
|
{
|
|
unsigned short len, udp_length, temp, ip_length;
|
|
unsigned long ip_temp;
|
|
int even_bound = 0;
|
|
|
|
|
|
x25_udp_pkt_t *x25_udp_pkt = (x25_udp_pkt_t *)data;
|
|
|
|
/* Set length of packet */
|
|
len = sizeof(ip_pkt_t)+
|
|
sizeof(udp_pkt_t)+
|
|
sizeof(wp_mgmt_t)+
|
|
sizeof(cblock_t)+
|
|
mbox_len;
|
|
|
|
|
|
/* fill in UDP reply */
|
|
x25_udp_pkt->wp_mgmt.request_reply = UDPMGMT_REPLY;
|
|
|
|
/* fill in UDP length */
|
|
udp_length = sizeof(udp_pkt_t)+
|
|
sizeof(wp_mgmt_t)+
|
|
sizeof(cblock_t)+
|
|
mbox_len;
|
|
|
|
|
|
/* put it on an even boundary */
|
|
if ( udp_length & 0x0001 ) {
|
|
udp_length += 1;
|
|
len += 1;
|
|
even_bound = 1;
|
|
}
|
|
|
|
temp = (udp_length<<8)|(udp_length>>8);
|
|
x25_udp_pkt->udp_pkt.udp_length = temp;
|
|
|
|
/* swap UDP ports */
|
|
temp = x25_udp_pkt->udp_pkt.udp_src_port;
|
|
x25_udp_pkt->udp_pkt.udp_src_port =
|
|
x25_udp_pkt->udp_pkt.udp_dst_port;
|
|
x25_udp_pkt->udp_pkt.udp_dst_port = temp;
|
|
|
|
|
|
|
|
/* add UDP pseudo header */
|
|
temp = 0x1100;
|
|
*((unsigned short *)
|
|
(x25_udp_pkt->data+mbox_len+even_bound)) = temp;
|
|
temp = (udp_length<<8)|(udp_length>>8);
|
|
*((unsigned short *)
|
|
(x25_udp_pkt->data+mbox_len+even_bound+2)) = temp;
|
|
|
|
/* calculate UDP checksum */
|
|
x25_udp_pkt->udp_pkt.udp_checksum = 0;
|
|
|
|
x25_udp_pkt->udp_pkt.udp_checksum =
|
|
calc_checksum(&data[UDP_OFFSET], udp_length+UDP_OFFSET);
|
|
|
|
/* fill in IP length */
|
|
ip_length = len;
|
|
temp = (ip_length<<8)|(ip_length>>8);
|
|
x25_udp_pkt->ip_pkt.total_length = temp;
|
|
|
|
/* swap IP addresses */
|
|
ip_temp = x25_udp_pkt->ip_pkt.ip_src_address;
|
|
x25_udp_pkt->ip_pkt.ip_src_address =
|
|
x25_udp_pkt->ip_pkt.ip_dst_address;
|
|
x25_udp_pkt->ip_pkt.ip_dst_address = ip_temp;
|
|
|
|
|
|
/* fill in IP checksum */
|
|
x25_udp_pkt->ip_pkt.hdr_checksum = 0;
|
|
x25_udp_pkt->ip_pkt.hdr_checksum = calc_checksum(data, sizeof(ip_pkt_t));
|
|
|
|
return len;
|
|
} /* reply_udp */
|
|
|
|
unsigned short calc_checksum (char *data, int len)
|
|
{
|
|
unsigned short temp;
|
|
unsigned long sum=0;
|
|
int i;
|
|
|
|
for( i = 0; i <len; i+=2 ) {
|
|
memcpy(&temp,&data[i],2);
|
|
sum += (unsigned long)temp;
|
|
}
|
|
|
|
while (sum >> 16 ) {
|
|
sum = (sum & 0xffffUL) + (sum >> 16);
|
|
}
|
|
|
|
temp = (unsigned short)sum;
|
|
temp = ~temp;
|
|
|
|
if( temp == 0 )
|
|
temp = 0xffff;
|
|
|
|
return temp;
|
|
}
|
|
|
|
/*=============================================================================
|
|
* Store a UDP management packet for later processing.
|
|
*/
|
|
|
|
static int store_udp_mgmt_pkt(int udp_type, char udp_pkt_src, sdla_t* card,
|
|
struct net_device *dev, struct sk_buff *skb,
|
|
int lcn)
|
|
{
|
|
int udp_pkt_stored = 0;
|
|
|
|
if(!card->u.x.udp_pkt_lgth && (skb->len <= MAX_LGTH_UDP_MGNT_PKT)){
|
|
card->u.x.udp_pkt_lgth = skb->len;
|
|
card->u.x.udp_type = udp_type;
|
|
card->u.x.udp_pkt_src = udp_pkt_src;
|
|
card->u.x.udp_lcn = lcn;
|
|
card->u.x.udp_dev = dev;
|
|
memcpy(card->u.x.udp_pkt_data, skb->data, skb->len);
|
|
card->u.x.timer_int_enabled |= TMR_INT_ENABLED_UDP_PKT;
|
|
udp_pkt_stored = 1;
|
|
|
|
}else{
|
|
printk(KERN_INFO "%s: ERROR: UDP packet not stored for LCN %d\n",
|
|
card->devname,lcn);
|
|
}
|
|
|
|
if(udp_pkt_src == UDP_PKT_FRM_STACK){
|
|
dev_kfree_skb_any(skb);
|
|
}else{
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
|
|
return(udp_pkt_stored);
|
|
}
|
|
|
|
|
|
|
|
/*=============================================================================
|
|
* Initial the ppp_private_area structure.
|
|
*/
|
|
static void init_x25_channel_struct( x25_channel_t *chan )
|
|
{
|
|
memset(&chan->if_send_stat.if_send_entry,0,sizeof(if_send_stat_t));
|
|
memset(&chan->rx_intr_stat.rx_intr_no_socket,0,sizeof(rx_intr_stat_t));
|
|
memset(&chan->pipe_mgmt_stat.UDP_PIPE_mgmt_kmalloc_err,0,sizeof(pipe_mgmt_stat_t));
|
|
}
|
|
|
|
/*============================================================================
|
|
* Initialize Global Statistics
|
|
*/
|
|
static void init_global_statistics( sdla_t *card )
|
|
{
|
|
memset(&card->statistics.isr_entry,0,sizeof(global_stats_t));
|
|
}
|
|
|
|
|
|
/*===============================================================
|
|
* SMP Support
|
|
* ==============================================================*/
|
|
|
|
static void S508_S514_lock(sdla_t *card, unsigned long *smp_flags)
|
|
{
|
|
spin_lock_irqsave(&card->wandev.lock, *smp_flags);
|
|
}
|
|
static void S508_S514_unlock(sdla_t *card, unsigned long *smp_flags)
|
|
{
|
|
spin_unlock_irqrestore(&card->wandev.lock, *smp_flags);
|
|
}
|
|
|
|
/*===============================================================
|
|
* x25_timer_routine
|
|
*
|
|
* A more efficient polling routine. Each half a second
|
|
* queue a polling task. We want to do the polling in a
|
|
* task not timer, because timer runs in interrupt time.
|
|
*
|
|
* FIXME Polling should be rethinked.
|
|
*==============================================================*/
|
|
|
|
static void x25_timer_routine(unsigned long data)
|
|
{
|
|
sdla_t *card = (sdla_t*)data;
|
|
|
|
if (!card->wandev.dev){
|
|
printk(KERN_INFO "%s: Stopping the X25 Poll Timer: No Dev.\n",
|
|
card->devname);
|
|
return;
|
|
}
|
|
|
|
if (card->open_cnt != card->u.x.num_of_ch){
|
|
printk(KERN_INFO "%s: Stopping the X25 Poll Timer: Interface down.\n",
|
|
card->devname);
|
|
return;
|
|
}
|
|
|
|
if (test_bit(PERI_CRIT,&card->wandev.critical)){
|
|
printk(KERN_INFO "%s: Stopping the X25 Poll Timer: Shutting down.\n",
|
|
card->devname);
|
|
return;
|
|
}
|
|
|
|
if (!test_and_set_bit(POLL_CRIT,&card->wandev.critical)){
|
|
trigger_x25_poll(card);
|
|
}
|
|
|
|
card->u.x.x25_timer.expires=jiffies+(HZ>>1);
|
|
add_timer(&card->u.x.x25_timer);
|
|
return;
|
|
}
|
|
|
|
void disable_comm_shutdown(sdla_t *card)
|
|
{
|
|
TX25Mbox* mbox = card->mbox;
|
|
int err;
|
|
|
|
/* Turn of interrutps */
|
|
mbox->data[0] = 0;
|
|
if (card->hw.fwid == SFID_X25_508){
|
|
mbox->data[1] = card->hw.irq;
|
|
mbox->data[2] = 2;
|
|
mbox->cmd.length = 3;
|
|
}else {
|
|
mbox->cmd.length = 1;
|
|
}
|
|
mbox->cmd.command = X25_SET_INTERRUPT_MODE;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
if (err)
|
|
printk(KERN_INFO "INTERRUPT OFF FAIED %x\n",err);
|
|
|
|
/* Bring down HDLC */
|
|
mbox->cmd.command = X25_HDLC_LINK_CLOSE;
|
|
mbox->cmd.length = 0;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
if (err)
|
|
printk(KERN_INFO "LINK CLOSED FAILED %x\n",err);
|
|
|
|
|
|
/* Brind down DTR */
|
|
mbox->data[0] = 0;
|
|
mbox->data[2] = 0;
|
|
mbox->data[1] = 0x01;
|
|
mbox->cmd.length = 3;
|
|
mbox->cmd.command = X25_SET_GLOBAL_VARS;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
if (err)
|
|
printk(KERN_INFO "DTR DOWN FAILED %x\n",err);
|
|
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
/****** End *****************************************************************/
|