net.c 37.2 KB
Newer Older
Laurent Aimar's avatar
 
Laurent Aimar committed
1 2 3
/*****************************************************************************
 * net.c:
 *****************************************************************************
4
 * Copyright (C) 2004-2005 the VideoLAN team
5
 * $Id$
Laurent Aimar's avatar
 
Laurent Aimar committed
6 7
 *
 * Authors: Laurent Aimar <fenrir@videolan.org>
8
 *          Rémi Denis-Courmont <rem # videolan.org>
Laurent Aimar's avatar
 
Laurent Aimar committed
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include <stdlib.h>
#include <vlc/vlc.h>

31
#include <errno.h>
Laurent Aimar's avatar
 
Laurent Aimar committed
32 33 34 35 36 37 38 39 40

#ifdef HAVE_FCNTL_H
#   include <fcntl.h>
#endif

#ifdef HAVE_SYS_TIME_H
#    include <sys/time.h>
#endif

Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
41
#if defined( WIN32 ) || defined( UNDER_CE )
42 43 44
#   if defined(UNDER_CE) && defined(sockaddr_storage)
#       undef sockaddr_storage
#   endif
45
#   include <io.h>
Laurent Aimar's avatar
 
Laurent Aimar committed
46 47 48 49
#   include <winsock2.h>
#   include <ws2tcpip.h>
#else
#   include <sys/socket.h>
50
#   include <netinet/in.h>
Eric Petit's avatar
Eric Petit committed
51 52 53
#   ifdef HAVE_ARPA_INET_H
#       include <arpa/inet.h>
#   endif
54
#   include <netdb.h>
Laurent Aimar's avatar
 
Laurent Aimar committed
55 56
#endif

gbazin's avatar
gbazin committed
57 58 59 60
#ifdef HAVE_UNISTD_H
#   include <unistd.h>
#endif

Laurent Aimar's avatar
 
Laurent Aimar committed
61 62
#include "network.h"

63 64 65 66 67 68 69 70 71 72 73 74 75 76
#ifndef INADDR_ANY
#   define INADDR_ANY  0x00000000
#endif
#ifndef INADDR_NONE
#   define INADDR_NONE 0xFFFFFFFF
#endif

static int SocksNegociate( vlc_object_t *, int fd, int i_socks_version,
                           char *psz_socks_user, char *psz_socks_passwd );
static int SocksHandshakeTCP( vlc_object_t *,
                              int fd, int i_socks_version,
                              char *psz_socks_user, char *psz_socks_passwd,
                              const char *psz_host, int i_port );

77 78 79 80 81 82 83 84 85
static int net_Socket( vlc_object_t *p_this, int i_family, int i_socktype,
                       int i_protocol )
{
    int fd, i_val;

    fd = socket( i_family, i_socktype, i_protocol );
    if( fd == -1 )
    {
#if defined(WIN32) || defined(UNDER_CE)
86 87 88
        if( WSAGetLastError ( ) != WSAEAFNOSUPPORT )
            msg_Warn( p_this, "cannot create socket (%i)",
                      WSAGetLastError() );
89
#else
90 91 92
        if( errno != EAFNOSUPPORT )
            msg_Warn( p_this, "cannot create socket (%s)",
                      strerror( errno ) );
93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129
#endif
        return -1;
    }

        /* Set to non-blocking */
#if defined( WIN32 ) || defined( UNDER_CE )
    {
        unsigned long i_dummy = 1;
        if( ioctlsocket( fd, FIONBIO, &i_dummy ) != 0 )
            msg_Err( p_this, "cannot set socket to non-blocking mode" );
    }
#else
    if( ( ( i_val = fcntl( fd, F_GETFL, 0 ) ) < 0 ) ||
        ( fcntl( fd, F_SETFL, i_val | O_NONBLOCK ) < 0 ) )
        msg_Err( p_this, "cannot set socket to non-blocking mode (%s)",
                 strerror( errno ) );
#endif

    i_val = 1;
    setsockopt( fd, SOL_SOCKET, SO_REUSEADDR, (void *)&i_val,
                sizeof( i_val ) );

#ifdef IPV6_V6ONLY
    /*
     * Accepts only IPv6 connections on IPv6 sockets
     * (and open an IPv4 socket later as well if needed).
     * Only Linux and FreeBSD can map IPv4 connections on IPv6 sockets,
     * so this allows for more uniform handling across platforms. Besides,
     * it makes sure that IPv4 addresses will be printed as w.x.y.z rather
     * than ::ffff:w.x.y.z
     */
    if( i_family == AF_INET6 )
        setsockopt( fd, IPPROTO_IPV6, IPV6_V6ONLY, (void *)&i_val,
                    sizeof( i_val ) );
#endif

#if defined( WIN32 ) || defined( UNDER_CE )
130 131 132
# ifndef IPV6_PROTECTION_LEVEL
#  define IPV6_PROTECTION_LEVEL 23
# endif
133 134
    if( i_family == AF_INET6 )
    {
135
        i_val = 30 /*PROTECTION_LEVEL_UNRESTRICTED*/;
136 137
        setsockopt( fd, IPPROTO_IPV6, IPV6_PROTECTION_LEVEL,
                   (const char*)&i_val, sizeof( i_val ) );
138 139 140 141 142
    }
#endif
    return fd;
}

Laurent Aimar's avatar
 
Laurent Aimar committed
143 144 145 146 147
/*****************************************************************************
 * __net_OpenTCP:
 *****************************************************************************
 * Open a TCP connection and return a handle
 *****************************************************************************/
hartman's avatar
 
hartman committed
148
int __net_OpenTCP( vlc_object_t *p_this, const char *psz_host, int i_port )
Laurent Aimar's avatar
 
Laurent Aimar committed
149
{
150 151
    struct addrinfo hints, *res, *ptr;
    const char      *psz_realhost;
152 153
    char            *psz_socks;
    int             i_realport, i_val, i_handle = -1;
Laurent Aimar's avatar
 
Laurent Aimar committed
154

155 156
    if( i_port == 0 )
        i_port = 80; /* historical VLC thing */
Laurent Aimar's avatar
 
Laurent Aimar committed
157

158 159
    memset( &hints, 0, sizeof( hints ) );
    hints.ai_socktype = SOCK_STREAM;
Laurent Aimar's avatar
 
Laurent Aimar committed
160

161 162
    psz_socks = var_CreateGetString( p_this, "socks" );
    if( *psz_socks && *psz_socks != ':' )
Laurent Aimar's avatar
 
Laurent Aimar committed
163
    {
164
        char *psz = strchr( psz_socks, ':' );
165 166 167 168

        if( psz )
            *psz++ = '\0';

169
        psz_realhost = psz_socks;
170
        i_realport = ( psz != NULL ) ? atoi( psz ) : 1080;
171

172 173
        msg_Dbg( p_this, "net: connecting to '%s:%d' for '%s:%d'",
                 psz_realhost, i_realport, psz_host, i_port );
174 175 176
    }
    else
    {
177
        psz_realhost = psz_host;
178
        i_realport = i_port;
179

180 181
        msg_Dbg( p_this, "net: connecting to '%s:%d'", psz_realhost,
                 i_realport );
182
    }
183

184
    i_val = vlc_getaddrinfo( p_this, psz_realhost, i_realport, &hints, &res );
185
    if( i_val )
Laurent Aimar's avatar
 
Laurent Aimar committed
186
    {
187 188
        msg_Err( p_this, "cannot resolve '%s:%d' : %s", psz_realhost,
                 i_realport, vlc_gai_strerror( i_val ) );
189
        free( psz_socks );
Laurent Aimar's avatar
 
Laurent Aimar committed
190 191 192
        return -1;
    }

193 194 195 196
    for( ptr = res; (ptr != NULL) && (i_handle == -1); ptr = ptr->ai_next )
    {
        int fd;

197 198
        fd = net_Socket( p_this, ptr->ai_family, ptr->ai_socktype,
                         ptr->ai_protocol );
199 200 201 202 203
        if( fd == -1 )
            continue;

        if( connect( fd, ptr->ai_addr, ptr->ai_addrlen ) )
        {
204
            socklen_t i_val_size = sizeof( i_val );
205
            div_t d;
206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228
            struct timeval tv;
            vlc_value_t timeout;
#if defined( WIN32 ) || defined( UNDER_CE )
            if( WSAGetLastError() != WSAEWOULDBLOCK )
            {
                msg_Warn( p_this, "connection to %s:%d failed (%d)", psz_host,
                          i_port, WSAGetLastError( ) );
                net_Close( fd );
                continue;
            }
#else
            if( errno != EINPROGRESS )
            {
                msg_Warn( p_this, "connection to %s:%d : %s", psz_host,
                          i_port, strerror( errno ) );
                net_Close( fd );
                continue;
            }
#endif

            var_Create( p_this, "ipv4-timeout",
                        VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
            var_Get( p_this, "ipv4-timeout", &timeout );
229 230 231 232 233 234
            if( timeout.i_int < 0 )
            {
                msg_Err( p_this, "invalid negative value for ipv4-timeout" );
                timeout.i_int = 0;
            }
            d = div( timeout.i_int, 100 );
235 236 237 238

            msg_Dbg( p_this, "connection in progress" );
            do
            {
239 240
                fd_set fds;

241 242 243 244 245 246 247 248 249 250 251 252 253 254 255
                if( p_this->b_die )
                {
                    msg_Dbg( p_this, "connection aborted" );
                    net_Close( fd );
                    vlc_freeaddrinfo( res );
                    free( psz_socks );
                    return -1;
                }

                /* Initialize file descriptor set */
                FD_ZERO( &fds );
                FD_SET( fd, &fds );

                /* We'll wait 0.1 second if nothing happens */
                tv.tv_sec = 0;
256
                tv.tv_usec = (d.quot > 0) ? 100000 : (1000 * d.rem);
257 258

                i_val = select( fd + 1, NULL, &fds, NULL, &tv );
259 260 261 262 263 264 265 266 267 268

                if( d.quot <= 0 )
                {
                    msg_Dbg( p_this, "connection timed out" );
                    net_Close( fd );
                    fd = -1;
                    break;
                }

                d.quot--;
269 270 271 272 273 274 275 276 277
            }
            while( ( i_val == 0 ) || ( ( i_val < 0 ) &&
#if defined( WIN32 ) || defined( UNDER_CE )
                            ( WSAGetLastError() == WSAEWOULDBLOCK )
#else
                            ( errno == EINTR )
#endif
                     ) );

278 279 280
            if( fd == -1 )
                continue; /* timeout */

281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309
            if( i_val < 0 )
            {
                msg_Warn( p_this, "connection aborted (select failed)" );
                net_Close( fd );
                continue;
            }

#if !defined( SYS_BEOS ) && !defined( UNDER_CE )
            if( getsockopt( fd, SOL_SOCKET, SO_ERROR, (void*)&i_val,
                            &i_val_size ) == -1 || i_val != 0 )
            {
#ifdef WIN32
                msg_Warn( p_this, "connection to %s:%d failed (%d)", psz_host,
                          i_port, WSAGetLastError( ) );
#else
                msg_Warn( p_this, "connection to %s:%d : %s", psz_host,
                          i_port, strerror( i_val ) );
#endif
                net_Close( fd );
                continue;
            }
#endif
        }
        i_handle = fd; /* success! */
    }
    
    vlc_freeaddrinfo( res );

    if( *psz_socks && *psz_socks != ':' )
310 311 312 313
    {
        char *psz_user = var_CreateGetString( p_this, "socks-user" );
        char *psz_pwd  = var_CreateGetString( p_this, "socks-pwd" );

314
        if( SocksHandshakeTCP( p_this, i_handle, 5, psz_user, psz_pwd,
315 316 317
                               psz_host, i_port ) )
        {
            msg_Err( p_this, "failed to use the SOCKS server" );
318 319
            net_Close( i_handle );
            i_handle = -1;
320 321 322 323 324
        }

        free( psz_user );
        free( psz_pwd );
    }
325
    free( psz_socks );
326

327
    return i_handle;
Laurent Aimar's avatar
 
Laurent Aimar committed
328 329
}

330

331 332 333
/*****************************************************************************
 * __net_ListenTCP:
 *****************************************************************************
334 335
 * Open TCP passive "listening" socket(s)
 * This function returns NULL in case of error.
336
 *****************************************************************************/
337
int *__net_ListenTCP( vlc_object_t *p_this, const char *psz_host, int i_port )
338
{
339 340
    struct addrinfo hints, *res, *ptr;
    int             i_val, *pi_handles, i_size;
341

342 343 344
    memset( &hints, 0, sizeof( hints ) );
    hints.ai_socktype = SOCK_STREAM;
    hints.ai_flags = AI_PASSIVE;
345

346
    msg_Dbg( p_this, "net: listening to '%s:%d'", psz_host, i_port );
347

348
    i_val = vlc_getaddrinfo( p_this, psz_host, i_port, &hints, &res );
349
    if( i_val )
350
    {
351
        msg_Err( p_this, "cannot resolve '%s:%d' : %s", psz_host, i_port,
352 353
                 vlc_gai_strerror( i_val ) );
        return NULL;
354 355
    }

356 357
    pi_handles = NULL;
    i_size = 1;
358

359
    for( ptr = res; ptr != NULL; ptr = ptr->ai_next )
360
    {
361 362
        int fd, *newpi;

363 364
        fd = net_Socket( p_this, ptr->ai_family, ptr->ai_socktype,
                         ptr->ai_protocol );
365 366
        if( fd == -1 )
            continue;
367

368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404
        /* Bind the socket */
        if( bind( fd, ptr->ai_addr, ptr->ai_addrlen ) )
        {
#if defined(WIN32) || defined(UNDER_CE)
            msg_Warn( p_this, "cannot bind socket (%i)", WSAGetLastError( ) );
#else
            msg_Warn( p_this, "cannot bind socket (%s)", strerror( errno ) );
#endif
            net_Close( fd );
            continue;
        }
 
        /* Listen */
        if( listen( fd, 100 ) == -1 )
        {
#if defined(WIN32) || defined(UNDER_CE)
            msg_Err( p_this, "cannot bring socket in listening mode (%i)",
                     WSAGetLastError());
#else
            msg_Err( p_this, "cannot bring the socket in listening mode (%s)",
                     strerror( errno ) );
#endif
            net_Close( fd );
            continue;
        }

        newpi = (int *)realloc( pi_handles, (++i_size) * sizeof( int ) );
        if( newpi == NULL )
        {
            net_Close( fd );
            break;
        }
        else
        {
            newpi[i_size - 2] = fd;
            pi_handles = newpi;
        }
405
    }
406
    
Eric Petit's avatar
Eric Petit committed
407
    vlc_freeaddrinfo( res );
408

409 410
    if( pi_handles != NULL )
        pi_handles[i_size - 1] = -1;
411
    return pi_handles;
412 413
}

414 415 416
/*****************************************************************************
 * __net_Accept:
 *****************************************************************************
417
 * Accept a connection on a set of listening sockets and return it
418
 *****************************************************************************/
419
int __net_Accept( vlc_object_t *p_this, int *pi_fd, mtime_t i_wait )
420 421 422 423 424
{
    vlc_bool_t b_die = p_this->b_die, b_block = (i_wait < 0);

    while( p_this->b_die == b_die )
    {
425 426 427 428 429 430
        int i_val = -1, *pi, *pi_end;
        struct timeval timeout;
        fd_set fds_r, fds_e;

        pi = pi_fd;

431 432 433
        /* Initialize file descriptor set */
        FD_ZERO( &fds_r );
        FD_ZERO( &fds_e );
434 435 436 437 438 439 440 441 442 443 444 445

        for( pi = pi_fd; *pi != -1; pi++ )
        {
            int i_fd = *pi;

            if( i_fd > i_val )
                i_val = i_fd;

            FD_SET( i_fd, &fds_r );
            FD_SET( i_fd, &fds_e );
        }
        pi_end = pi;
446 447 448 449

        timeout.tv_sec = 0;
        timeout.tv_usec = b_block ? 500000 : i_wait;

450 451
        i_val = select( i_val + 1, &fds_r, NULL, &fds_e, &timeout );
        if( ( ( i_val < 0 ) && ( errno == EINTR ) ) || i_val == 0 )
452
        {
453 454 455 456
            if( b_block )
                continue;
            else
                return -1;
457
        }
458
        else if( i_val < 0 )
459
        {
gbazin's avatar
gbazin committed
460
#if defined(WIN32) || defined(UNDER_CE)
461
            msg_Err( p_this, "network select error (%i)", WSAGetLastError() );
462
#else
463
            msg_Err( p_this, "network select error (%s)", strerror( errno ) );
464 465 466 467
#endif
            return -1;
        }

468
        for( pi = pi_fd; *pi != -1; pi++ )
469
        {
470 471 472 473 474 475 476 477
            int i_fd = *pi;

            if( !FD_ISSET( i_fd, &fds_r ) && !FD_ISSET( i_fd, &fds_e ) )
                continue;

            i_val = accept( i_fd, NULL, 0 );
            if( i_val < 0 )
            {
gbazin's avatar
gbazin committed
478
#if defined(WIN32) || defined(UNDER_CE)
479
                msg_Err( p_this, "accept failed (%i)", WSAGetLastError() );
480
#else
481
                msg_Err( p_this, "accept failed (%s)", strerror( errno ) );
482
#endif
483 484 485 486 487 488 489 490 491 492 493 494
            }
            else
            {
                /*
                 * This round-robin trick ensures that the first sockets in
                 * pi_fd won't prevent the last ones from getting accept'ed.
                 */
                --pi_end;
                memmove( pi, pi + 1, pi_end - pi );
                *pi_end = i_fd;
                return i_val;
            }
495 496 497 498 499 500
        }
    }

    return -1;
}

Laurent Aimar's avatar
Laurent Aimar committed
501 502 503 504 505
/*****************************************************************************
 * __net_OpenUDP:
 *****************************************************************************
 * Open a UDP connection and return a handle
 *****************************************************************************/
506 507
int __net_OpenUDP( vlc_object_t *p_this, const char *psz_bind, int i_bind,
                   const char *psz_server, int i_server )
Laurent Aimar's avatar
Laurent Aimar committed
508
{
509
    vlc_value_t      v4, v6;
Laurent Aimar's avatar
Laurent Aimar committed
510 511
    void            *private;
    network_socket_t sock;
512
    module_t         *p_network = NULL;
Laurent Aimar's avatar
Laurent Aimar committed
513

gbazin's avatar
gbazin committed
514 515 516
    if( psz_server == NULL ) psz_server = "";
    if( psz_bind == NULL ) psz_bind = "";

Laurent Aimar's avatar
Laurent Aimar committed
517 518 519 520 521 522
    /* Prepare the network_socket_t structure */
    sock.psz_bind_addr   = psz_bind;
    sock.i_bind_port     = i_bind;
    sock.psz_server_addr = psz_server;
    sock.i_server_port   = i_server;
    sock.i_ttl           = 0;
523 524 525
    sock.v6only          = 0;
    sock.i_handle        = -1;

526
    msg_Dbg( p_this, "net: connecting to '[%s]:%d@[%s]:%d'",
Laurent Aimar's avatar
Laurent Aimar committed
527
             psz_server, i_server, psz_bind, i_bind );
528 529 530 531 532 533 534 535

    /* Check if we have force ipv4 or ipv6 */
    var_Create( p_this, "ipv4", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
    var_Get( p_this, "ipv4", &v4 );
    var_Create( p_this, "ipv6", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
    var_Get( p_this, "ipv6", &v6 );

    if( !v4.b_bool )
Laurent Aimar's avatar
Laurent Aimar committed
536
    {
537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584
        if( v6.b_bool )
            sock.v6only = 1;

        /* try IPv6 first (unless IPv4 forced) */
        private = p_this->p_private;
        p_this->p_private = (void*)&sock;
        p_network = module_Need( p_this, "network", "ipv6", VLC_TRUE );

        if( p_network != NULL )
            module_Unneed( p_this, p_network );

        p_this->p_private = private;

        /*
         * Check if the IP stack can receive IPv4 packets on IPv6 sockets.
         * If yes, then it is better to use the IPv6 socket.
         * Otherwise, if we also get an IPv4, we have to choose, so we use
         * IPv4 only.
         */
        if( ( sock.i_handle != -1 ) && ( ( sock.v6only == 0 ) || v6.b_bool ) )
            return sock.i_handle;
    }

    if( !v6.b_bool )
    {
        int fd6 = sock.i_handle;

        /* also try IPv4 (unless IPv6 forced) */
        private = p_this->p_private;
        p_this->p_private = (void*)&sock;
        p_network = module_Need( p_this, "network", "ipv4", VLC_TRUE );

        if( p_network != NULL )
            module_Unneed( p_this, p_network );

        p_this->p_private = private;

        if( fd6 != -1 )
        {
            if( sock.i_handle != -1 )
            {
                msg_Warn( p_this, "net: lame IPv6/IPv4 dual-stack present. "
                                  "Using only IPv4." );
                net_Close( fd6 );
            }
            else
                sock.i_handle = fd6;
        }
Laurent Aimar's avatar
Laurent Aimar committed
585
    }
586 587 588 589

    if( sock.i_handle == -1 )
        msg_Dbg( p_this, "net: connection to '[%s]:%d@[%s]:%d' failed",
                psz_server, i_server, psz_bind, i_bind );
Laurent Aimar's avatar
Laurent Aimar committed
590 591 592 593

    return sock.i_handle;
}

Laurent Aimar's avatar
 
Laurent Aimar committed
594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609
/*****************************************************************************
 * __net_Close:
 *****************************************************************************
 * Close a network handle
 *****************************************************************************/
void net_Close( int fd )
{
#ifdef UNDER_CE
    CloseHandle( (HANDLE)fd );
#elif defined( WIN32 )
    closesocket( fd );
#else
    close( fd );
#endif
}

610 611 612 613 614 615 616 617 618 619 620 621
void net_ListenClose( int *pi_fd )
{
    if( pi_fd != NULL )
    {
        int *pi;

        for( pi = pi_fd; *pi != -1; pi++ )
            net_Close( *pi );
        free( pi_fd );
    }
}

Laurent Aimar's avatar
 
Laurent Aimar committed
622 623 624 625
/*****************************************************************************
 * __net_Read:
 *****************************************************************************
 * Read from a network socket
626
 * If b_retry is true, then we repeat until we have read the right amount of
Laurent Aimar's avatar
 
Laurent Aimar committed
627 628
 * data
 *****************************************************************************/
629 630
int __net_Read( vlc_object_t *p_this, int fd, v_socket_t *p_vs,
                uint8_t *p_data, int i_data, vlc_bool_t b_retry )
Laurent Aimar's avatar
 
Laurent Aimar committed
631 632
{
    struct timeval  timeout;
633
    fd_set          fds_r, fds_e;
Laurent Aimar's avatar
 
Laurent Aimar committed
634 635 636
    int             i_recv;
    int             i_total = 0;
    int             i_ret;
637
    vlc_bool_t      b_die = p_this->b_die;
Laurent Aimar's avatar
 
Laurent Aimar committed
638 639 640 641 642

    while( i_data > 0 )
    {
        do
        {
643
            if( p_this->b_die != b_die )
Laurent Aimar's avatar
 
Laurent Aimar committed
644 645 646 647 648
            {
                return 0;
            }

            /* Initialize file descriptor set */
649 650 651 652
            FD_ZERO( &fds_r );
            FD_SET( fd, &fds_r );
            FD_ZERO( &fds_e );
            FD_SET( fd, &fds_e );
Laurent Aimar's avatar
 
Laurent Aimar committed
653 654 655 656

            /* We'll wait 0.5 second if nothing happens */
            timeout.tv_sec = 0;
            timeout.tv_usec = 500000;
657 658 659

        } while( (i_ret = select(fd + 1, &fds_r, NULL, &fds_e, &timeout)) == 0
                 || ( i_ret < 0 && errno == EINTR ) );
Laurent Aimar's avatar
 
Laurent Aimar committed
660 661 662

        if( i_ret < 0 )
        {
gbazin's avatar
gbazin committed
663
#if defined(WIN32) || defined(UNDER_CE)
664
            msg_Err( p_this, "network select error (%d)", WSAGetLastError() );
gbazin's avatar
gbazin committed
665
#else
Laurent Aimar's avatar
 
Laurent Aimar committed
666
            msg_Err( p_this, "network select error (%s)", strerror(errno) );
gbazin's avatar
gbazin committed
667
#endif
Laurent Aimar's avatar
 
Laurent Aimar committed
668 669 670
            return i_total > 0 ? i_total : -1;
        }

671 672 673
        if( ( i_recv = (p_vs != NULL)
              ? p_vs->pf_recv( p_vs->p_sys, p_data, i_data )
              : recv( fd, p_data, i_data, 0 ) ) < 0 )
Laurent Aimar's avatar
 
Laurent Aimar committed
674
        {
gbazin's avatar
gbazin committed
675
#if defined(WIN32) || defined(UNDER_CE)
676 677 678 679 680
            if( WSAGetLastError() == WSAEWOULDBLOCK )
            {
                /* only happens with p_vs (SSL) - not really an error */
            }
            else
Laurent Aimar's avatar
Laurent Aimar committed
681 682 683 684
            /* For udp only */
            /* On win32 recv() will fail if the datagram doesn't fit inside
             * the passed buffer, even though the buffer will be filled with
             * the first part of the datagram. */
zorglub's avatar
zorglub committed
685
            if( WSAGetLastError() == WSAEMSGSIZE )
Laurent Aimar's avatar
Laurent Aimar committed
686
            {
gbazin's avatar
gbazin committed
687
                msg_Err( p_this, "recv() failed. "
Laurent Aimar's avatar
Laurent Aimar committed
688
                         "Increase the mtu size (--mtu option)" );
689
                i_total += i_data;
Laurent Aimar's avatar
Laurent Aimar committed
690
            }
691 692
            else if( WSAGetLastError() == WSAEINTR ) continue;
            else msg_Err( p_this, "recv failed (%i)", WSAGetLastError() );
693
#else
694 695 696
            /* EAGAIN only happens with p_vs (SSL) and it's not an error */
            if( errno != EAGAIN )
                msg_Err( p_this, "recv failed (%s)", strerror(errno) );
697
#endif
Laurent Aimar's avatar
 
Laurent Aimar committed
698 699
            return i_total > 0 ? i_total : -1;
        }
700 701 702 703 704
        else if( i_recv == 0 )
        {
            /* Connection closed */
            b_retry = VLC_FALSE;
        }
Laurent Aimar's avatar
 
Laurent Aimar committed
705 706 707 708 709 710 711 712 713 714 715 716

        p_data += i_recv;
        i_data -= i_recv;
        i_total+= i_recv;
        if( !b_retry )
        {
            break;
        }
    }
    return i_total;
}

zorglub's avatar
zorglub committed
717 718 719 720 721
/*****************************************************************************
 * __net_ReadNonBlock:
 *****************************************************************************
 * Read from a network socket, non blocking mode (with timeout)
 *****************************************************************************/
722 723
int __net_ReadNonBlock( vlc_object_t *p_this, int fd, v_socket_t *p_vs,
                        uint8_t *p_data, int i_data, mtime_t i_wait)
zorglub's avatar
zorglub committed
724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746
{
    struct timeval  timeout;
    fd_set          fds_r, fds_e;
    int             i_recv;
    int             i_ret;

    /* Initialize file descriptor set */
    FD_ZERO( &fds_r );
    FD_SET( fd, &fds_r );
    FD_ZERO( &fds_e );
    FD_SET( fd, &fds_e );

    timeout.tv_sec = 0;
    timeout.tv_usec = i_wait;

    i_ret = select(fd + 1, &fds_r, NULL, &fds_e, &timeout);

    if( i_ret < 0 && errno == EINTR )
    {
        return 0;
    }
    else if( i_ret < 0 )
    {
gbazin's avatar
gbazin committed
747
#if defined(WIN32) || defined(UNDER_CE)
748
        msg_Err( p_this, "network select error (%d)", WSAGetLastError() );
gbazin's avatar
gbazin committed
749
#else
zorglub's avatar
zorglub committed
750
        msg_Err( p_this, "network select error (%s)", strerror(errno) );
gbazin's avatar
gbazin committed
751
#endif
zorglub's avatar
zorglub committed
752 753 754 755 756 757 758 759
        return -1;
    }
    else if( i_ret == 0)
    {
        return 0;
    }
    else
    {
gbazin's avatar
gbazin committed
760 761 762
#if !defined(UNDER_CE)
        if( fd == 0/*STDIN_FILENO*/ ) i_recv = read( fd, p_data, i_data ); else
#endif
763 764
        if( ( i_recv = (p_vs != NULL)
              ? p_vs->pf_recv( p_vs->p_sys, p_data, i_data )
765
              : recv( fd, p_data, i_data, 0 ) ) < 0 )
zorglub's avatar
zorglub committed
766
        {
gbazin's avatar
gbazin committed
767
#if defined(WIN32) || defined(UNDER_CE)
zorglub's avatar
zorglub committed
768 769 770 771 772 773 774 775 776
            /* For udp only */
            /* On win32 recv() will fail if the datagram doesn't fit inside
             * the passed buffer, even though the buffer will be filled with
             * the first part of the datagram. */
            if( WSAGetLastError() == WSAEMSGSIZE )
            {
                msg_Err( p_this, "recv() failed. "
                         "Increase the mtu size (--mtu option)" );
            }
777
            else msg_Err( p_this, "recv failed (%i)", WSAGetLastError() );
zorglub's avatar
zorglub committed
778 779 780 781 782
#else
            msg_Err( p_this, "recv failed (%s)", strerror(errno) );
#endif
            return -1;
        }
783 784

        return i_recv ? i_recv : -1;  /* !i_recv -> connection closed if tcp */
zorglub's avatar
zorglub committed
785
    }
786

zorglub's avatar
zorglub committed
787 788 789 790
    /* We will never be here */
    return -1;
}

zorglub's avatar
zorglub committed
791 792 793
/*****************************************************************************
 * __net_Select:
 *****************************************************************************
794 795
 * Read from several sockets (with timeout). Takes data from the first socket
 * that has some.
zorglub's avatar
zorglub committed
796
 *****************************************************************************/
797 798
int __net_Select( vlc_object_t *p_this, int *pi_fd, v_socket_t **pp_vs,
                  int i_fd, uint8_t *p_data, int i_data, mtime_t i_wait )
zorglub's avatar
zorglub committed
799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841
{
    struct timeval  timeout;
    fd_set          fds_r, fds_e;
    int             i_recv;
    int             i_ret;
    int             i;
    int             i_max_fd = 0;

    /* Initialize file descriptor set */
    FD_ZERO( &fds_r );
    FD_ZERO( &fds_e );

    for( i = 0 ; i < i_fd ; i++)
    {
        if( pi_fd[i] > i_max_fd ) i_max_fd = pi_fd[i];
        FD_SET( pi_fd[i], &fds_r );
        FD_SET( pi_fd[i], &fds_e );
    }

    timeout.tv_sec = 0;
    timeout.tv_usec = i_wait;

    i_ret = select( i_max_fd + 1, &fds_r, NULL, &fds_e, &timeout );

    if( i_ret < 0 && errno == EINTR )
    {
        return 0;
    }
    else if( i_ret < 0 )
    {
        msg_Err( p_this, "network select error (%s)", strerror(errno) );
        return -1;
    }
    else if( i_ret == 0 )
    {
        return 0;
    }
    else
    {
        for( i = 0 ; i < i_fd ; i++)
        {
            if( FD_ISSET( pi_fd[i], &fds_r ) )
            {
842 843 844
                i_recv = ((pp_vs != NULL) && (pp_vs[i] != NULL))
                         ? pp_vs[i]->pf_recv( pp_vs[i]->p_sys, p_data, i_data )
                         : recv( pi_fd[i], p_data, i_data, 0 );
845
                if( i_recv < 0 )
zorglub's avatar
zorglub committed
846 847 848 849 850 851 852 853 854 855 856
                {
#ifdef WIN32
                    /* For udp only */
                    /* On win32 recv() will fail if the datagram doesn't
                     * fit inside the passed buffer, even though the buffer
                     *  will be filled with the first part of the datagram. */
                    if( WSAGetLastError() == WSAEMSGSIZE )
                    {
                        msg_Err( p_this, "recv() failed. "
                             "Increase the mtu size (--mtu option)" );
                    }
857 858
                    else msg_Err( p_this, "recv failed (%i)",
                                  WSAGetLastError() );
zorglub's avatar
zorglub committed
859
#else
860
                    msg_Err( p_this, "recv failed (%s)", strerror(errno) );
zorglub's avatar
zorglub committed
861 862 863 864 865 866 867 868 869 870 871 872 873 874
#endif
                    return VLC_EGENERIC;
                }

                return i_recv;
            }
        }
    }

    /* We will never be here */
    return -1;
}


Laurent Aimar's avatar
 
Laurent Aimar committed
875
/* Write exact amount requested */
876
int __net_Write( vlc_object_t *p_this, int fd, v_socket_t *p_vs,
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
877
                 const uint8_t *p_data, int i_data )
Laurent Aimar's avatar
 
Laurent Aimar committed
878 879
{
    struct timeval  timeout;
880
    fd_set          fds_w, fds_e;
Laurent Aimar's avatar
 
Laurent Aimar committed
881 882 883 884
    int             i_send;
    int             i_total = 0;
    int             i_ret;

885 886
    vlc_bool_t      b_die = p_this->b_die;

Laurent Aimar's avatar
 
Laurent Aimar committed
887 888 889 890
    while( i_data > 0 )
    {
        do
        {
891
            if( p_this->b_die != b_die )
Laurent Aimar's avatar
 
Laurent Aimar committed
892 893 894 895 896
            {
                return 0;
            }

            /* Initialize file descriptor set */
897 898 899 900
            FD_ZERO( &fds_w );
            FD_SET( fd, &fds_w );
            FD_ZERO( &fds_e );
            FD_SET( fd, &fds_e );
Laurent Aimar's avatar
 
Laurent Aimar committed
901 902 903 904

            /* We'll wait 0.5 second if nothing happens */
            timeout.tv_sec = 0;
            timeout.tv_usec = 500000;
905 906 907

        } while( (i_ret = select(fd + 1, NULL, &fds_w, &fds_e, &timeout)) == 0
                 || ( i_ret < 0 && errno == EINTR ) );
Laurent Aimar's avatar
 
Laurent Aimar committed
908 909 910

        if( i_ret < 0 )
        {
gbazin's avatar
gbazin committed
911
#if defined(WIN32) || defined(UNDER_CE)
912
            msg_Err( p_this, "network select error (%d)", WSAGetLastError() );
gbazin's avatar
gbazin committed
913
#else
Laurent Aimar's avatar
 
Laurent Aimar committed
914
            msg_Err( p_this, "network select error (%s)", strerror(errno) );
gbazin's avatar
gbazin committed
915
#endif
Laurent Aimar's avatar
 
Laurent Aimar committed
916 917 918
            return i_total > 0 ? i_total : -1;
        }

919 920 921
        if( ( i_send = (p_vs != NULL)
                       ? p_vs->pf_send( p_vs->p_sys, p_data, i_data )
                       : send( fd, p_data, i_data, 0 ) ) < 0 )
Laurent Aimar's avatar
 
Laurent Aimar committed
922
        {
923 924 925
            /* XXX With udp for example, it will issue a message if the host
             * isn't listening */
            /* msg_Err( p_this, "send failed (%s)", strerror(errno) ); */
Laurent Aimar's avatar
 
Laurent Aimar committed
926 927 928 929 930 931 932 933 934 935
            return i_total > 0 ? i_total : -1;
        }

        p_data += i_send;
        i_data -= i_send;
        i_total+= i_send;
    }
    return i_total;
}

936
char *__net_Gets( vlc_object_t *p_this, int fd, v_socket_t *p_vs )
Laurent Aimar's avatar
 
Laurent Aimar committed
937
{
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
938 939
    char *psz_line = NULL, *ptr = NULL;
    size_t  i_line = 0, i_max = 0;
Laurent Aimar's avatar
 
Laurent Aimar committed
940 941 942 943


    for( ;; )
    {
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
944
        if( i_line == i_max )
Laurent Aimar's avatar
 
Laurent Aimar committed
945
        {
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
946 947 948
            i_max += 1024;
            psz_line = realloc( psz_line, i_max );
            ptr = psz_line + i_line;
Laurent Aimar's avatar
 
Laurent Aimar committed
949
        }
950

951
        if( net_Read( p_this, fd, p_vs, (uint8_t *)ptr, 1, VLC_TRUE ) != 1 )
Laurent Aimar's avatar
 
Laurent Aimar committed
952
        {
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
953 954 955 956 957
            if( i_line == 0 )
            {
                free( psz_line );
                return NULL;
            }
Laurent Aimar's avatar
 
Laurent Aimar committed
958 959 960
            break;
        }

Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
961 962
        if ( *ptr == '\n' )
            break;
Laurent Aimar's avatar
 
Laurent Aimar committed
963

Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
964 965
        i_line++;
        ptr++;
Laurent Aimar's avatar
 
Laurent Aimar committed
966 967
    }

Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
968 969
    *ptr-- = '\0';

Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
970
    if( ( ptr >= psz_line ) && ( *ptr == '\r' ) )
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
971 972
        *ptr = '\0';

Laurent Aimar's avatar
 
Laurent Aimar committed
973 974 975
    return psz_line;
}

976 977
int net_Printf( vlc_object_t *p_this, int fd, v_socket_t *p_vs,
                const char *psz_fmt, ... )
Laurent Aimar's avatar
 
Laurent Aimar committed
978
{
979
    int i_ret;
Laurent Aimar's avatar
 
Laurent Aimar committed
980
    va_list args;
981
    va_start( args, psz_fmt );
982
    i_ret = net_vaPrintf( p_this, fd, p_vs, psz_fmt, args );
983 984 985 986 987
    va_end( args );

    return i_ret;
}

988 989
int __net_vaPrintf( vlc_object_t *p_this, int fd, v_socket_t *p_vs,
                    const char *psz_fmt, va_list args )
990
{
Laurent Aimar's avatar
 
Laurent Aimar committed
991
    char    *psz;
992
    int     i_size, i_ret;
Laurent Aimar's avatar
 
Laurent Aimar committed
993

994
    i_size = vasprintf( &psz, psz_fmt, args );
995 996
    i_ret = __net_Write( p_this, fd, p_vs, (uint8_t *)psz, i_size ) < i_size
        ? -1 : i_size;
997 998 999
    free( psz );

    return i_ret;
Laurent Aimar's avatar
 
Laurent Aimar committed
1000
}
1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119



/*****************************************************************************
 * SocksNegociate:
 *****************************************************************************
 * Negociate authentication with a SOCKS server.
 *****************************************************************************/
static int SocksNegociate( vlc_object_t *p_obj,
                           int fd, int i_socks_version,
                           char *psz_socks_user,
                           char *psz_socks_passwd )
{
    uint8_t buffer[128+2*256];
    int i_len;
    vlc_bool_t b_auth = VLC_FALSE;

    if( i_socks_version != 5 )
        return VLC_SUCCESS;

    /* We negociate authentication */

    if( psz_socks_user && psz_socks_passwd &&
        *psz_socks_user && *psz_socks_passwd )
        b_auth = VLC_TRUE;

    buffer[0] = i_socks_version;    /* SOCKS version */
    if( b_auth )
    {
        buffer[1] = 2;                  /* Number of methods */
        buffer[2] = 0x00;               /* - No auth required */
        buffer[3] = 0x02;               /* - USer/Password */
        i_len = 4;
    }
    else
    {
        buffer[1] = 1;                  /* Number of methods */
        buffer[2] = 0x00;               /* - No auth required */
        i_len = 3;
    }
    
    if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
        return VLC_EGENERIC;
    if( net_Read( p_obj, fd, NULL, buffer, 2, VLC_TRUE ) != 2 )
        return VLC_EGENERIC;

    msg_Dbg( p_obj, "socks: v=%d method=%x", buffer[0], buffer[1] );

    if( buffer[1] == 0x00 )
    {
        msg_Dbg( p_obj, "socks: no authentication required" );
    }
    else if( buffer[1] == 0x02 )
    {
        int i_len1 = __MIN( strlen(psz_socks_user), 255 );
        int i_len2 = __MIN( strlen(psz_socks_passwd), 255 );
        msg_Dbg( p_obj, "socks: username/password authentication" );

        /* XXX: we don't support user/pwd > 255 (truncated)*/
        buffer[0] = i_socks_version;        /* Version */
        buffer[1] = i_len1;                 /* User length */
        memcpy( &buffer[2], psz_socks_user, i_len1 );
        buffer[2+i_len1] = i_len2;          /* Password length */
        memcpy( &buffer[2+i_len1+1], psz_socks_passwd, i_len2 );

        i_len = 3 + i_len1 + i_len2;

        if( net_Write( p_obj, fd, NULL, buffer, i_len ) != i_len )
            return VLC_EGENERIC;

        if( net_Read( p_obj, fd, NULL, buffer, 2, VLC_TRUE ) != 2 )
            return VLC_EGENERIC;

        msg_Dbg( p_obj, "socks: v=%d status=%x", buffer[0], buffer[1] );
        if( buffer[1] != 0x00 )
        {
            msg_Err( p_obj, "socks: authentication rejected" );
            return VLC_EGENERIC;
        }
    }
    else
    {
        if( b_auth )
            msg_Err( p_obj, "socks: unsupported authentication method %x",
                     buffer[0] );
        else
            msg_Err( p_obj, "socks: authentification needed" );
        return VLC_EGENERIC;
    }

    return VLC_SUCCESS;
}

/*****************************************************************************
 * SocksHandshakeTCP:
 *****************************************************************************
 * Open a TCP connection using a SOCKS server and return a handle (RFC 1928)
 *****************************************************************************/
static int SocksHandshakeTCP( vlc_object_t *p_obj,
                              int fd,
                              int i_socks_version,
                              char *psz_socks_user, char *psz_socks_passwd,
                              const char *psz_host, int i_port )
{
    uint8_t buffer[128+2*256];

    if( i_socks_version != 4 && i_socks_version != 5 )
    {
        msg_Warn( p_obj, "invalid socks protocol version %d", i_socks_version );
        i_socks_version = 5;
    }

    if( i_socks_version == 5 && 
        SocksNegociate( p_obj, fd, i_socks_version,
                        psz_socks_user, psz_socks_passwd ) )
        return VLC_EGENERIC;

    if( i_socks_version == 4 )
    {
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
1120
        struct addrinfo hints = { 0 }, *p_res;
1121 1122

        /* v4 only support ipv4 */
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
1123
        hints.ai_family = AF_INET;
1124
        if( vlc_getaddrinfo( p_obj, psz_host, 0, &hints, &p_res ) )
1125 1126 1127 1128 1129
            return VLC_EGENERIC;

        buffer[0] = i_socks_version;
        buffer[1] = 0x01;               /* CONNECT */
        SetWBE( &buffer[2], i_port );   /* Port */
Rémi Denis-Courmont's avatar
Rémi Denis-Courmont committed
1130 1131 1132 1133
        memcpy( &buffer[4],             /* Address */
                &((struct sockaddr_in *)(p_res->ai_addr))->sin_addr, 4 );
        vlc_freeaddrinfo( p_res );

1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 <