mirror of
https://github.com/ShaYmez/NXDNClients.git
synced 2024-08-26 07:56:34 -04:00
392 lines
9.8 KiB
C++
392 lines
9.8 KiB
C++
/*
|
|
* Copyright (C) 2006-2016,2020,2021 by Jonathan Naylor G4KLX
|
|
*
|
|
* 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 "UDPSocket.h"
|
|
|
|
#include <cassert>
|
|
|
|
#if !defined(_WIN32) && !defined(_WIN64)
|
|
#include <cerrno>
|
|
#include <cstring>
|
|
#endif
|
|
|
|
#if defined(HAVE_LOG_H)
|
|
#include "Log.h"
|
|
#else
|
|
#define LogMessage(fmt, ...) ::fprintf(stderr, fmt "\n", ## __VA_ARGS__)
|
|
#define LogError(fmt, ...) ::fprintf(stderr, fmt "\n", ## __VA_ARGS__)
|
|
#define LogInfo(fmt, ...) ::fprintf(stderr, fmt "\n", ## __VA_ARGS__)
|
|
#endif
|
|
|
|
CUDPSocket::CUDPSocket(const std::string& address, unsigned short port) :
|
|
m_address_save(address),
|
|
m_port_save(port),
|
|
m_counter(0U)
|
|
{
|
|
for (int i = 0; i < UDP_SOCKET_MAX; i++) {
|
|
m_address[i] = "";
|
|
m_port[i] = 0U;
|
|
m_af[i] = 0U;
|
|
m_fd[i] = -1;
|
|
}
|
|
}
|
|
|
|
CUDPSocket::CUDPSocket(unsigned short port) :
|
|
m_address_save(),
|
|
m_port_save(port),
|
|
m_counter(0U)
|
|
{
|
|
for (int i = 0; i < UDP_SOCKET_MAX; i++) {
|
|
m_address[i] = "";
|
|
m_port[i] = 0U;
|
|
m_af[i] = 0U;
|
|
m_fd[i] = -1;
|
|
}
|
|
}
|
|
|
|
CUDPSocket::~CUDPSocket()
|
|
{
|
|
}
|
|
|
|
void CUDPSocket::startup()
|
|
{
|
|
#if defined(_WIN32) || defined(_WIN64)
|
|
WSAData data;
|
|
int wsaRet = ::WSAStartup(MAKEWORD(2, 2), &data);
|
|
if (wsaRet != 0)
|
|
LogError("Error from WSAStartup");
|
|
#endif
|
|
}
|
|
|
|
void CUDPSocket::shutdown()
|
|
{
|
|
#if defined(_WIN32) || defined(_WIN64)
|
|
::WSACleanup();
|
|
#endif
|
|
}
|
|
|
|
int CUDPSocket::lookup(const std::string& hostname, unsigned short port, sockaddr_storage& addr, unsigned int& address_length)
|
|
{
|
|
struct addrinfo hints;
|
|
::memset(&hints, 0, sizeof(hints));
|
|
|
|
return lookup(hostname, port, addr, address_length, hints);
|
|
}
|
|
|
|
int CUDPSocket::lookup(const std::string& hostname, unsigned short port, sockaddr_storage& addr, unsigned int& address_length, struct addrinfo& hints)
|
|
{
|
|
std::string portstr = std::to_string(port);
|
|
struct addrinfo *res;
|
|
|
|
/* port is always digits, no needs to lookup service */
|
|
hints.ai_flags |= AI_NUMERICSERV;
|
|
|
|
int err = getaddrinfo(hostname.empty() ? NULL : hostname.c_str(), portstr.c_str(), &hints, &res);
|
|
if (err != 0) {
|
|
sockaddr_in* paddr = (sockaddr_in*)&addr;
|
|
::memset(paddr, 0x00U, address_length = sizeof(sockaddr_in));
|
|
paddr->sin_family = AF_INET;
|
|
paddr->sin_port = htons(port);
|
|
paddr->sin_addr.s_addr = htonl(INADDR_NONE);
|
|
LogError("Cannot find address for host %s", hostname.c_str());
|
|
return err;
|
|
}
|
|
|
|
::memcpy(&addr, res->ai_addr, address_length = res->ai_addrlen);
|
|
|
|
freeaddrinfo(res);
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool CUDPSocket::match(const sockaddr_storage& addr1, const sockaddr_storage& addr2, IPMATCHTYPE type)
|
|
{
|
|
if (addr1.ss_family != addr2.ss_family)
|
|
return false;
|
|
|
|
if (type == IMT_ADDRESS_AND_PORT) {
|
|
switch (addr1.ss_family) {
|
|
case AF_INET:
|
|
struct sockaddr_in *in_1, *in_2;
|
|
in_1 = (struct sockaddr_in*)&addr1;
|
|
in_2 = (struct sockaddr_in*)&addr2;
|
|
return (in_1->sin_addr.s_addr == in_2->sin_addr.s_addr) && (in_1->sin_port == in_2->sin_port);
|
|
case AF_INET6:
|
|
struct sockaddr_in6 *in6_1, *in6_2;
|
|
in6_1 = (struct sockaddr_in6*)&addr1;
|
|
in6_2 = (struct sockaddr_in6*)&addr2;
|
|
return IN6_ARE_ADDR_EQUAL(&in6_1->sin6_addr, &in6_2->sin6_addr) && (in6_1->sin6_port == in6_2->sin6_port);
|
|
default:
|
|
return false;
|
|
}
|
|
} else if (type == IMT_ADDRESS_ONLY) {
|
|
switch (addr1.ss_family) {
|
|
case AF_INET:
|
|
struct sockaddr_in *in_1, *in_2;
|
|
in_1 = (struct sockaddr_in*)&addr1;
|
|
in_2 = (struct sockaddr_in*)&addr2;
|
|
return in_1->sin_addr.s_addr == in_2->sin_addr.s_addr;
|
|
case AF_INET6:
|
|
struct sockaddr_in6 *in6_1, *in6_2;
|
|
in6_1 = (struct sockaddr_in6*)&addr1;
|
|
in6_2 = (struct sockaddr_in6*)&addr2;
|
|
return IN6_ARE_ADDR_EQUAL(&in6_1->sin6_addr, &in6_2->sin6_addr);
|
|
default:
|
|
return false;
|
|
}
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool CUDPSocket::isNone(const sockaddr_storage& addr)
|
|
{
|
|
struct sockaddr_in *in = (struct sockaddr_in *)&addr;
|
|
|
|
return ((addr.ss_family == AF_INET) && (in->sin_addr.s_addr == htonl(INADDR_NONE)));
|
|
}
|
|
|
|
char* CUDPSocket::display(const sockaddr_storage& addr, char* buffer, unsigned int length)
|
|
{
|
|
assert(buffer != NULL);
|
|
assert(length > INET6_ADDRSTRLEN);
|
|
|
|
switch (addr.ss_family) {
|
|
case AF_INET: {
|
|
struct sockaddr_in* in4 = (struct sockaddr_in*)&addr;
|
|
::inet_ntop(AF_INET, &in4->sin_addr, buffer, length);
|
|
::sprintf(buffer + ::strlen(buffer), ":%u", in4->sin_port);
|
|
}
|
|
break;
|
|
|
|
case AF_INET6: {
|
|
struct sockaddr_in6* in6 = (struct sockaddr_in6*)&addr;
|
|
::inet_ntop(AF_INET6, &in6->sin6_addr, buffer, length);
|
|
::sprintf(buffer + ::strlen(buffer), ":%u", in6->sin6_port);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
::strcpy(buffer, "Unknown");
|
|
break;
|
|
}
|
|
|
|
return buffer;
|
|
}
|
|
|
|
bool CUDPSocket::open(const sockaddr_storage& address)
|
|
{
|
|
return open(address.ss_family);
|
|
}
|
|
|
|
bool CUDPSocket::open(unsigned int af)
|
|
{
|
|
return open(0, af, m_address_save, m_port_save);
|
|
}
|
|
|
|
bool CUDPSocket::open(const unsigned int index, const unsigned int af, const std::string& address, const unsigned short port)
|
|
{
|
|
sockaddr_storage addr;
|
|
unsigned int addrlen;
|
|
struct addrinfo hints;
|
|
|
|
::memset(&hints, 0, sizeof(hints));
|
|
hints.ai_flags = AI_PASSIVE;
|
|
hints.ai_family = af;
|
|
|
|
/* to determine protocol family, call lookup() first. */
|
|
int err = lookup(address, port, addr, addrlen, hints);
|
|
if (err != 0) {
|
|
LogError("The local address is invalid - %s", address.c_str());
|
|
return false;
|
|
}
|
|
|
|
close(index);
|
|
|
|
int fd = ::socket(addr.ss_family, SOCK_DGRAM, 0);
|
|
if (fd < 0) {
|
|
#if defined(_WIN32) || defined(_WIN64)
|
|
LogError("Cannot create the UDP socket, err: %lu", ::GetLastError());
|
|
#else
|
|
LogError("Cannot create the UDP socket, err: %d", errno);
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
m_address[index] = address;
|
|
m_port[index] = port;
|
|
m_af[index] = addr.ss_family;
|
|
m_fd[index] = fd;
|
|
|
|
if (port > 0U) {
|
|
int reuse = 1;
|
|
if (::setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&reuse, sizeof(reuse)) == -1) {
|
|
#if defined(_WIN32) || defined(_WIN64)
|
|
LogError("Cannot set the UDP socket option, err: %lu", ::GetLastError());
|
|
#else
|
|
LogError("Cannot set the UDP socket option, err: %d", errno);
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
if (::bind(fd, (sockaddr*)&addr, addrlen) == -1) {
|
|
#if defined(_WIN32) || defined(_WIN64)
|
|
LogError("Cannot bind the UDP address, err: %lu", ::GetLastError());
|
|
#else
|
|
LogError("Cannot bind the UDP address, err: %d", errno);
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
LogInfo("Opening UDP port on %hu", port);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
int CUDPSocket::read(unsigned char* buffer, unsigned int length, sockaddr_storage& address, unsigned int &address_length)
|
|
{
|
|
assert(buffer != NULL);
|
|
assert(length > 0U);
|
|
|
|
// Check that the readfrom() won't block
|
|
int i, n;
|
|
struct pollfd pfd[UDP_SOCKET_MAX];
|
|
for (i = n = 0; i < UDP_SOCKET_MAX; i++) {
|
|
if (m_fd[i] >= 0) {
|
|
pfd[n].fd = m_fd[i];
|
|
pfd[n].events = POLLIN;
|
|
n++;
|
|
}
|
|
}
|
|
|
|
// no socket descriptor to receive
|
|
if (n == 0)
|
|
return 0;
|
|
|
|
// Return immediately
|
|
#if defined(_WIN32) || defined(_WIN64)
|
|
int ret = WSAPoll(pfd, n, 0);
|
|
#else
|
|
int ret = ::poll(pfd, n, 0);
|
|
#endif
|
|
if (ret < 0) {
|
|
#if defined(_WIN32) || defined(_WIN64)
|
|
LogError("Error returned from UDP poll, err: %lu", ::GetLastError());
|
|
#else
|
|
LogError("Error returned from UDP poll, err: %d", errno);
|
|
#endif
|
|
return -1;
|
|
}
|
|
|
|
int index;
|
|
for (i = 0; i < n; i++) {
|
|
// round robin
|
|
index = (i + m_counter) % n;
|
|
if (pfd[index].revents & POLLIN)
|
|
break;
|
|
}
|
|
if (i == n)
|
|
return 0;
|
|
|
|
#if defined(_WIN32) || defined(_WIN64)
|
|
int size = sizeof(sockaddr_storage);
|
|
#else
|
|
socklen_t size = sizeof(sockaddr_storage);
|
|
#endif
|
|
|
|
#if defined(_WIN32) || defined(_WIN64)
|
|
int len = ::recvfrom(pfd[index].fd, (char*)buffer, length, 0, (sockaddr *)&address, &size);
|
|
#else
|
|
ssize_t len = ::recvfrom(pfd[index].fd, (char*)buffer, length, 0, (sockaddr *)&address, &size);
|
|
#endif
|
|
if (len <= 0) {
|
|
#if defined(_WIN32) || defined(_WIN64)
|
|
LogError("Error returned from recvfrom, err: %lu", ::GetLastError());
|
|
#else
|
|
LogError("Error returned from recvfrom, err: %d", errno);
|
|
|
|
if (len == -1 && errno == ENOTSOCK) {
|
|
LogMessage("Re-opening UDP port on %hu", m_port[index]);
|
|
close();
|
|
open();
|
|
}
|
|
#endif
|
|
return -1;
|
|
}
|
|
|
|
m_counter++;
|
|
address_length = size;
|
|
return len;
|
|
}
|
|
|
|
bool CUDPSocket::write(const unsigned char* buffer, unsigned int length, const sockaddr_storage& address, unsigned int address_length)
|
|
{
|
|
assert(buffer != NULL);
|
|
assert(length > 0U);
|
|
|
|
bool result = false;
|
|
|
|
for (int i = 0; i < UDP_SOCKET_MAX; i++) {
|
|
if (m_fd[i] < 0 || m_af[i] != address.ss_family)
|
|
continue;
|
|
|
|
#if defined(_WIN32) || defined(_WIN64)
|
|
int ret = ::sendto(m_fd[i], (char *)buffer, length, 0, (sockaddr *)&address, address_length);
|
|
#else
|
|
ssize_t ret = ::sendto(m_fd[i], (char *)buffer, length, 0, (sockaddr *)&address, address_length);
|
|
#endif
|
|
|
|
if (ret < 0) {
|
|
#if defined(_WIN32) || defined(_WIN64)
|
|
LogError("Error returned from sendto, err: %lu", ::GetLastError());
|
|
#else
|
|
LogError("Error returned from sendto, err: %d", errno);
|
|
#endif
|
|
} else {
|
|
#if defined(_WIN32) || defined(_WIN64)
|
|
if (ret == int(length))
|
|
result = true;
|
|
#else
|
|
if (ret == ssize_t(length))
|
|
result = true;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
void CUDPSocket::close()
|
|
{
|
|
for (unsigned int i = 0; i < UDP_SOCKET_MAX; i++)
|
|
close(i);
|
|
}
|
|
|
|
void CUDPSocket::close(const unsigned int index)
|
|
{
|
|
if ((index < UDP_SOCKET_MAX) && (m_fd[index] >= 0)) {
|
|
#if defined(_WIN32) || defined(_WIN64)
|
|
::closesocket(m_fd[index]);
|
|
#else
|
|
::close(m_fd[index]);
|
|
#endif
|
|
m_fd[index] = -1;
|
|
}
|
|
}
|