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mpv/stream/tcp.c

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/*
* Copyright (C) 2001 Bertrand BAUDET, 2006 Benjamin Zores
* Network helpers for TCP connections
* (originally borrowed from network.c,
* by Bertrand BAUDET <bertrand_baudet@yahoo.com>).
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <ctype.h>
#include <netdb.h>
#include <unistd.h>
#include <fcntl.h>
#ifndef HAVE_WINSOCK2
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#define closesocket close
#else
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
#include "mp_msg.h"
#include "help_mp.h"
#include "tcp.h"
/* IPv6 options */
int network_prefer_ipv4 = 0;
/* Converts an address family constant to a string */
static const char *
af2String (int af)
{
switch (af)
{
case AF_INET:
return "AF_INET";
#ifdef HAVE_AF_INET6
case AF_INET6:
return "AF_INET6";
#endif
default:
return "Unknown address family!";
}
}
static int
connect2Server_with_af (char *host, int port, int af ,int verb)
{
int socket_server_fd;
int err;
socklen_t err_len;
int ret, count = 0;
fd_set set;
struct timeval tv;
union {
struct sockaddr_in four;
#ifdef HAVE_AF_INET6
struct sockaddr_in6 six;
#endif
} server_address;
size_t server_address_size;
void *our_s_addr; /* Pointer to sin_addr or sin6_addr */
struct hostent *hp = NULL;
char buf[255];
#ifdef HAVE_WINSOCK2
u_long val;
#endif
socket_server_fd = socket (af, SOCK_STREAM, 0);
if (socket_server_fd == -1)
return TCP_ERROR_FATAL;
switch (af)
{
case AF_INET:
our_s_addr = (void *) &server_address.four.sin_addr;
break;
#ifdef HAVE_AF_INET6
case AF_INET6:
our_s_addr = (void *) &server_address.six.sin6_addr;
break;
#endif
default:
mp_msg (MSGT_NETWORK, MSGL_ERR, MSGTR_MPDEMUX_NW_UnknownAF, af);
return TCP_ERROR_FATAL;
}
memset (&server_address, 0, sizeof (server_address));
#ifndef HAVE_WINSOCK2
#ifdef USE_ATON
if (inet_aton (host, our_s_addr) !=1)
#else
if (inet_pton (af, host, our_s_addr) !=1)
#endif /* USE_ATON */
#else
if (inet_addr (host) == INADDR_NONE)
#endif /* HAVE_WINSOCK2 */
{
if (verb)
mp_msg (MSGT_NETWORK, MSGL_STATUS,
MSGTR_MPDEMUX_NW_ResolvingHostForAF, host, af2String (af));
#ifdef HAVE_GETHOSTBYNAME2
hp = (struct hostent *) gethostbyname2 (host, af);
#else
hp = (struct hostent *) gethostbyname (host);
#endif /* HAVE_GETHOSTBYNAME2 */
if (!hp)
{
if (verb)
mp_msg (MSGT_NETWORK, MSGL_ERR,
MSGTR_MPDEMUX_NW_CantResolv, af2String (af), host);
return TCP_ERROR_FATAL;
}
memcpy (our_s_addr, (void *) hp->h_addr_list[0], hp->h_length);
}
#ifdef HAVE_WINSOCK2
else
{
unsigned long addr = inet_addr (host);
memcpy (our_s_addr, (void *) &addr, sizeof (addr));
}
#endif /* HAVE_WINSOCK2 */
switch (af)
{
case AF_INET:
server_address.four.sin_family = af;
server_address.four.sin_port = htons (port);
server_address_size = sizeof (server_address.four);
break;
#ifdef HAVE_AF_INET6
case AF_INET6:
server_address.six.sin6_family = af;
server_address.six.sin6_port = htons (port);
server_address_size = sizeof (server_address.six);
break;
#endif /* HAVE_AF_INET6 */
default:
mp_msg (MSGT_NETWORK, MSGL_ERR, MSGTR_MPDEMUX_NW_UnknownAF, af);
return TCP_ERROR_FATAL;
}
#if defined(USE_ATON) || defined(HAVE_WINSOCK2)
strncpy (buf, inet_ntoa (*((struct in_addr *) our_s_addr)), 255);
#else
inet_ntop (af, our_s_addr, buf, 255);
#endif /* USE_ATON || HAVE_WINSOCK2 */
if (verb)
mp_msg (MSGT_NETWORK, MSGL_STATUS,
MSGTR_MPDEMUX_NW_ConnectingToServer, host, buf, port);
/* Turn the socket as non blocking so we can timeout on the connection */
#ifndef HAVE_WINSOCK2
fcntl (socket_server_fd, F_SETFL,
fcntl (socket_server_fd, F_GETFL) | O_NONBLOCK);
#else
val = 1;
ioctlsocket (socket_server_fd, FIONBIO, &val);
#endif /* HAVE_WINSOCK2 */
if (connect (socket_server_fd, (struct sockaddr *) &server_address,
server_address_size) == -1)
{
#ifndef HAVE_WINSOCK2
if (errno != EINPROGRESS)
#else
if ((WSAGetLastError () != WSAEINPROGRESS)
&& (WSAGetLastError () != WSAEWOULDBLOCK))
#endif /* HAVE_WINSOCK2 */
{
if (verb)
mp_msg (MSGT_NETWORK, MSGL_ERR,
MSGTR_MPDEMUX_NW_CantConnect2Server, af2String (af));
closesocket (socket_server_fd);
return TCP_ERROR_PORT;
}
}
tv.tv_sec = 0;
tv.tv_usec = 500000;
FD_ZERO (&set);
FD_SET (socket_server_fd, &set);
/* When the connection will be made, we will have a writable fd */
while ((ret = select (socket_server_fd + 1, NULL, &set, NULL, &tv)) == 0)
{
if (ret < 0)
mp_msg (MSGT_NETWORK, MSGL_ERR, MSGTR_MPDEMUX_NW_SelectFailed);
else if (ret > 0)
break;
else if (count > 30 || mp_input_check_interrupt (500))
{
if (count > 30)
mp_msg (MSGT_NETWORK, MSGL_ERR, MSGTR_MPDEMUX_NW_ConnTimeout);
else
mp_msg (MSGT_NETWORK, MSGL_V, "Connection interuppted by user\n");
return TCP_ERROR_TIMEOUT;
}
count++;
FD_ZERO (&set);
FD_SET (socket_server_fd, &set);
tv.tv_sec = 0;
tv.tv_usec = 500000;
}
/* Turn back the socket as blocking */
#ifndef HAVE_WINSOCK2
fcntl (socket_server_fd, F_SETFL,
fcntl (socket_server_fd, F_GETFL) & ~O_NONBLOCK);
#else
val = 0;
ioctlsocket (socket_server_fd, FIONBIO, &val);
#endif /* HAVE_WINSOCK2 */
/* Check if there were any error */
err_len = sizeof (int);
ret = getsockopt (socket_server_fd, SOL_SOCKET, SO_ERROR, &err, &err_len);
if (ret < 0)
{
mp_msg (MSGT_NETWORK, MSGL_ERR,
MSGTR_MPDEMUX_NW_GetSockOptFailed, strerror (errno));
return TCP_ERROR_FATAL;
}
if (err > 0)
{
mp_msg (MSGT_NETWORK, MSGL_ERR,
MSGTR_MPDEMUX_NW_ConnectError, strerror (err));
return TCP_ERROR_PORT;
}
return socket_server_fd;
}
int
connect2Server (char *host, int port, int verb)
{
#ifdef HAVE_AF_INET6
int r;
int s = TCP_ERROR_FATAL;
r = connect2Server_with_af (host, port,
network_prefer_ipv4 ? AF_INET:AF_INET6, verb);
if (r > TCP_ERROR_PORT)
return r;
s = connect2Server_with_af (host, port,
network_prefer_ipv4 ? AF_INET6:AF_INET, verb);
if (s == TCP_ERROR_FATAL)
return r;
return s;
#else
return connect2Server_with_af (host, port, AF_INET,verb);
#endif /* HAVE_AF_INET6 */
}
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