stream/tcp.c

   1 /*
   2  * Network layer for MPlayer
   3  * by Bertrand BAUDET <bertrand_baudet@yahoo.com>
   4  * (C) 2001, MPlayer team.
   5  */
   6
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include <unistd.h>
  10
  11 #include <errno.h>
  12 #include <ctype.h>
  13
  14 #include <fcntl.h>
  15 #include <sys/time.h>
  16 #include <sys/types.h>
  17
  18 #include "config.h"
  19
  20 #include "mp_msg.h"
  21 #include "help_mp.h"
  22
  23 #ifndef HAVE_WINSOCK2_H
  24 #include <netdb.h>
  25 #include <netinet/in.h>
  26 #include <sys/socket.h>
  27 #include <arpa/inet.h>
  28 #else
  29 #include <winsock2.h>
  30 #include <ws2tcpip.h>
  31 #endif
  32
  33 #include "network.h"
  34 #include "stream.h"
  35 #include "tcp.h"
  36
  37 /* IPv6 options */
  38 int   network_prefer_ipv4 = 0;
  39
  40 // Converts an address family constant to a string
  41
  42 static const char *af2String(int af) {
  43         switch (af) {
  44                 case AF_INET:   return "AF_INET";
  45
  46 #ifdef HAVE_AF_INET6
  47                 case AF_INET6:  return "AF_INET6";
  48 #endif
  49                 default:        return "Unknown address family!";
  50         }
  51 }
  52
  53
  54
  55 // Connect to a server using a TCP connection, with specified address family
  56 // return -2 for fatal error, like unable to resolve name, connection timeout...
  57 // return -1 is unable to connect to a particular port
  58
  59 static int
  60 connect2Server_with_af(char *host, int port, int af,int verb) {
  61         int socket_server_fd;
  62         int err;
  63         socklen_t err_len;
  64         int ret,count = 0;
  65         fd_set set;
  66         struct timeval tv;
  67         union {
  68                 struct sockaddr_in four;
  69 #ifdef HAVE_AF_INET6
  70                 struct sockaddr_in6 six;
  71 #endif
  72         } server_address;
  73         size_t server_address_size;
  74         void *our_s_addr;       // Pointer to sin_addr or sin6_addr
  75         struct hostent *hp=NULL;
  76         char buf[255];
  77
  78 #ifdef HAVE_WINSOCK2_H
  79         unsigned long val;
  80         int to;
  81 #else
  82         struct timeval to;
  83 #endif
  84
  85         socket_server_fd = socket(af, SOCK_STREAM, 0);
  86
  87
  88         if( socket_server_fd==-1 ) {
  89 //              mp_msg(MSGT_NETWORK,MSGL_ERR,"Failed to create %s socket:\n", af2String(af));
  90                 return TCP_ERROR_FATAL;
  91         }
  92
  93 #if defined(SO_RCVTIMEO) && defined(SO_SNDTIMEO)
  94 #ifdef HAVE_WINSOCK2_H
  95         /* timeout in milliseconds */
  96         to = 10 * 1000;
  97 #else
  98         to.tv_sec = 10;
  99         to.tv_usec = 0;
 100 #endif
 101         setsockopt(socket_server_fd, SOL_SOCKET, SO_RCVTIMEO, &to, sizeof(to));
 102         setsockopt(socket_server_fd, SOL_SOCKET, SO_SNDTIMEO, &to, sizeof(to));
 103 #endif
 104
 105         switch (af) {
 106                 case AF_INET:  our_s_addr = (void *) &server_address.four.sin_addr; break;
 107 #ifdef HAVE_AF_INET6
 108                 case AF_INET6: our_s_addr = (void *) &server_address.six.sin6_addr; break;
 109 #endif
 110                 default:
 111                         mp_msg(MSGT_NETWORK,MSGL_ERR, MSGTR_MPDEMUX_NW_UnknownAF, af);
 112                         return TCP_ERROR_FATAL;
 113         }
 114
 115
 116         memset(&server_address, 0, sizeof(server_address));
 117
 118 #ifndef HAVE_WINSOCK2_H
 119 #ifdef HAVE_ATON
 120         if (inet_aton(host, our_s_addr)!=1)
 121 #else
 122         if (inet_pton(af, host, our_s_addr)!=1)
 123 #endif
 124 #else
 125         if ( inet_addr(host)==INADDR_NONE )
 126 #endif
 127         {
 128                 if(verb) mp_msg(MSGT_NETWORK,MSGL_STATUS,MSGTR_MPDEMUX_NW_ResolvingHostForAF, host, af2String(af));
 129
 130 #ifdef HAVE_GETHOSTBYNAME2
 131                 hp=(struct hostent*)gethostbyname2( host, af );
 132 #else
 133                 hp=(struct hostent*)gethostbyname( host );
 134 #endif
 135                 if( hp==NULL ) {
 136                         if(verb) mp_msg(MSGT_NETWORK,MSGL_ERR,MSGTR_MPDEMUX_NW_CantResolv, af2String(af), host);
 137                         return TCP_ERROR_FATAL;
 138                 }
 139
 140                 memcpy( our_s_addr, (void*)hp->h_addr_list[0], hp->h_length );
 141         }
 142 #ifdef HAVE_WINSOCK2_H
 143         else {
 144                 unsigned long addr = inet_addr(host);
 145                 memcpy( our_s_addr, (void*)&addr, sizeof(addr) );
 146         }
 147 #endif
 148
 149         switch (af) {
 150                 case AF_INET:
 151                         server_address.four.sin_family=af;
 152                         server_address.four.sin_port=htons(port);
 153                         server_address_size = sizeof(server_address.four);
 154                         break;
 155 #ifdef HAVE_AF_INET6
 156                 case AF_INET6:
 157                         server_address.six.sin6_family=af;
 158                         server_address.six.sin6_port=htons(port);
 159                         server_address_size = sizeof(server_address.six);
 160                         break;
 161 #endif
 162                 default:
 163                         mp_msg(MSGT_NETWORK,MSGL_ERR, MSGTR_MPDEMUX_NW_UnknownAF, af);
 164                         return TCP_ERROR_FATAL;
 165         }
 166
 167 #if defined(HAVE_ATON) || defined(HAVE_WINSOCK2_H)
 168         strncpy( buf, inet_ntoa( *((struct in_addr*)our_s_addr) ), 255);
 169 #else
 170         inet_ntop(af, our_s_addr, buf, 255);
 171 #endif
 172         if(verb) mp_msg(MSGT_NETWORK,MSGL_STATUS,MSGTR_MPDEMUX_NW_ConnectingToServer, host, buf , port );
 173
 174         // Turn the socket as non blocking so we can timeout on the connection
 175 #ifndef HAVE_WINSOCK2_H
 176         fcntl( socket_server_fd, F_SETFL, fcntl(socket_server_fd, F_GETFL) | O_NONBLOCK );
 177 #else
 178         val = 1;
 179         ioctlsocket( socket_server_fd, FIONBIO, &val );
 180 #endif
 181         if( connect( socket_server_fd, (struct sockaddr*)&server_address, server_address_size )==-1 ) {
 182 #ifndef HAVE_WINSOCK2_H
 183                 if( errno!=EINPROGRESS ) {
 184 #else
 185                 if( (WSAGetLastError() != WSAEINPROGRESS) && (WSAGetLastError() != WSAEWOULDBLOCK) ) {
 186 #endif
 187                         if(verb) mp_msg(MSGT_NETWORK,MSGL_ERR,MSGTR_MPDEMUX_NW_CantConnect2Server, af2String(af));
 188                         closesocket(socket_server_fd);
 189                         return TCP_ERROR_PORT;
 190                 }
 191         }
 192         tv.tv_sec = 0;
 193         tv.tv_usec = 500000;
 194         FD_ZERO( &set );
 195         FD_SET( socket_server_fd, &set );
 196         // When the connection will be made, we will have a writeable fd
 197         while((ret = select(socket_server_fd+1, NULL, &set, NULL, &tv)) == 0) {
 198               if(count > 30 || stream_check_interrupt(500)) {
 199                 if(count > 30)
 200                   mp_msg(MSGT_NETWORK,MSGL_ERR,MSGTR_MPDEMUX_NW_ConnTimeout);
 201                 else
 202                   mp_msg(MSGT_NETWORK,MSGL_V,"Connection interrupted by user\n");
 203                 return TCP_ERROR_TIMEOUT;
 204               }
 205               count++;
 206               FD_ZERO( &set );
 207               FD_SET( socket_server_fd, &set );
 208               tv.tv_sec = 0;
 209               tv.tv_usec = 500000;
 210         }
 211         if (ret < 0) mp_msg(MSGT_NETWORK,MSGL_ERR,MSGTR_MPDEMUX_NW_SelectFailed);
 212
 213         // Turn back the socket as blocking
 214 #ifndef HAVE_WINSOCK2_H
 215         fcntl( socket_server_fd, F_SETFL, fcntl(socket_server_fd, F_GETFL) & ~O_NONBLOCK );
 216 #else
 217         val = 0;
 218         ioctlsocket( socket_server_fd, FIONBIO, &val );
 219 #endif
 220         // Check if there were any errors
 221         err_len = sizeof(int);
 222         ret =  getsockopt(socket_server_fd,SOL_SOCKET,SO_ERROR,&err,&err_len);
 223         if(ret < 0) {
 224                 mp_msg(MSGT_NETWORK,MSGL_ERR,MSGTR_MPDEMUX_NW_GetSockOptFailed,strerror(errno));
 225                 return TCP_ERROR_FATAL;
 226         }
 227         if(err > 0) {
 228                 mp_msg(MSGT_NETWORK,MSGL_ERR,MSGTR_MPDEMUX_NW_ConnectError,strerror(err));
 229                 return TCP_ERROR_PORT;
 230         }
 231
 232         return socket_server_fd;
 233 }
 234
 235 // Connect to a server using a TCP connection
 236 // return -2 for fatal error, like unable to resolve name, connection timeout...
 237 // return -1 is unable to connect to a particular port
 238
 239
 240 int
 241 connect2Server(char *host, int  port, int verb) {
 242 #ifdef HAVE_AF_INET6
 243         int r;
 244         int s = TCP_ERROR_FATAL;
 245
 246         r = connect2Server_with_af(host, port, network_prefer_ipv4 ? AF_INET:AF_INET6,verb);
 247         if (r >= 0) return r;
 248
 249         s = connect2Server_with_af(host, port, network_prefer_ipv4 ? AF_INET6:AF_INET,verb);
 250         if (s == TCP_ERROR_FATAL) return r;
 251         return s;
 252 #else
 253         return connect2Server_with_af(host, port, AF_INET,verb);
 254 #endif
 255
 256
 257 }