130 lines
3.6 KiB
C
130 lines
3.6 KiB
C
/*
|
|
* High Speed modem to transfer data in a 2,7kHz SSB channel
|
|
* =========================================================
|
|
* Author: DJ0ABR
|
|
*
|
|
* (c) DJ0ABR
|
|
* www.dj0abr.de
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
*/
|
|
#include "qo100modem.h"
|
|
|
|
void *threadfunction(void *dummy);
|
|
|
|
#define MAXUDPTHREADS 20
|
|
RXCFG rxcfg[MAXUDPTHREADS];
|
|
int rxcfg_idx = 0;
|
|
|
|
// start UDP reception
|
|
// sock ... pointer to a socket (just a pointer to an int)
|
|
// port ... own port, messages only to this port are received
|
|
// rxfunc ... pointer to a callback function, will be called for received data
|
|
// keeprunning ... pointer to an int. If it is set to 0, the function exits
|
|
void UdpRxInit(int *sock, int port, void (*rxfunc)(uint8_t *, int, struct sockaddr_in*), int *keeprunning)
|
|
{
|
|
if(rxcfg_idx >= MAXUDPTHREADS)
|
|
{
|
|
printf("max number of UDP threads\n");
|
|
exit(0);
|
|
}
|
|
|
|
rxcfg[rxcfg_idx].sock = sock;
|
|
rxcfg[rxcfg_idx].port = port;
|
|
rxcfg[rxcfg_idx].rxfunc = rxfunc;
|
|
rxcfg[rxcfg_idx].keeprunning = keeprunning;
|
|
|
|
// bind port
|
|
struct sockaddr_in sin;
|
|
|
|
*sock = socket(PF_INET, SOCK_DGRAM, 0);
|
|
if (*sock == -1){
|
|
printf("Failed to create Socket\n");
|
|
exit(0);
|
|
}
|
|
|
|
int enable = 1;
|
|
setsockopt(*sock, SOL_SOCKET, SO_REUSEADDR, &enable, sizeof(int));
|
|
|
|
memset(&sin, 0, sizeof(struct sockaddr_in));
|
|
sin.sin_family = AF_INET;
|
|
sin.sin_port = htons(port);
|
|
sin.sin_addr.s_addr = INADDR_ANY;
|
|
|
|
if (bind(*sock, (struct sockaddr *)&sin, sizeof(struct sockaddr_in)) != 0)
|
|
{
|
|
printf("Failed to bind socket, port:%d\n",port);
|
|
close(*sock);
|
|
exit(0);
|
|
}
|
|
|
|
// port sucessfully bound
|
|
// create the receive thread
|
|
pthread_t rxthread;
|
|
pthread_create(&rxthread, NULL, threadfunction, &(rxcfg[rxcfg_idx]));
|
|
|
|
rxcfg_idx++;
|
|
}
|
|
|
|
void *threadfunction(void *param)
|
|
{
|
|
RXCFG rxcfg;
|
|
memcpy((uint8_t *)(&rxcfg), (uint8_t *)param, sizeof(RXCFG));
|
|
|
|
socklen_t fromlen;
|
|
int recvlen;
|
|
char rxbuf[256];
|
|
struct sockaddr_in fromSock;
|
|
|
|
fromlen = sizeof(struct sockaddr_in);
|
|
while(*rxcfg.keeprunning)
|
|
{
|
|
recvlen = recvfrom(*rxcfg.sock, rxbuf, 256, 0, (struct sockaddr *)&fromSock, &fromlen);
|
|
if (recvlen > 0)
|
|
{
|
|
// data received, send it to callback function
|
|
(*rxcfg.rxfunc)((uint8_t *)rxbuf,recvlen, &fromSock);
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
// send UDP message
|
|
void sendUDP(char *destIP, int destPort, uint8_t *pdata, int len)
|
|
{
|
|
int sockfd;
|
|
struct sockaddr_in servaddr;
|
|
|
|
// Creating socket file descriptor
|
|
if ( (sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0 ) {
|
|
printf("sendUDP: socket creation failed\n");
|
|
exit(0);
|
|
}
|
|
|
|
memset(&servaddr, 0, sizeof(servaddr));
|
|
|
|
// Filling server information
|
|
servaddr.sin_family = AF_INET;
|
|
servaddr.sin_port = htons(destPort);
|
|
//printf("Send to <%s><%d> Len:%d\n",destIP,destPort,len);
|
|
servaddr.sin_addr.s_addr=inet_addr(destIP);
|
|
|
|
sendto(sockfd, (char *)pdata, len, 0, (const struct sockaddr *) &servaddr, sizeof(servaddr));
|
|
close(sockfd);
|
|
}
|
|
|