/***************************************************************************** * ftp.c: FTP input module ***************************************************************************** * Copyright (C) 2001-2006 VLC authors and VideoLAN * Copyright © 2006 Rémi Denis-Courmont * $Id$ * * Authors: Laurent Aimar - original code * Rémi Denis-Courmont - EPSV support * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser 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. *****************************************************************************/ /***************************************************************************** * Preamble *****************************************************************************/ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef IPPORT_FTP # define IPPORT_FTP 21u #endif #ifndef IPPORT_FTPS # define IPPORT_FTPS 990u #endif /***************************************************************************** * Module descriptor *****************************************************************************/ static int InOpen ( vlc_object_t * ); static void InClose( vlc_object_t * ); #ifdef ENABLE_SOUT static int OutOpen ( vlc_object_t * ); static void OutClose( vlc_object_t * ); #endif #define USER_TEXT N_("Username") #define USER_LONGTEXT N_("Username that will be used for the connection, " \ "if no username is set in the URL.") #define PASS_TEXT N_("Password") #define PASS_LONGTEXT N_("Password that will be used for the connection, " \ "if no username or password are set in URL.") #define ACCOUNT_TEXT N_("FTP account") #define ACCOUNT_LONGTEXT N_("Account that will be " \ "used for the connection.") #define LOGIN_DIALOG_TITLE _("FTP authentication") #define LOGIN_DIALOG_TEXT _("Please enter a valid login and password for " \ "the ftp connexion to %s") vlc_module_begin () set_shortname( "FTP" ) set_description( N_("FTP input") ) set_capability( "access", 0 ) set_category( CAT_INPUT ) set_subcategory( SUBCAT_INPUT_ACCESS ) add_string( "ftp-user", NULL, USER_TEXT, USER_LONGTEXT, false ) add_password( "ftp-pwd", NULL, PASS_TEXT, PASS_LONGTEXT, false ) add_string( "ftp-account", "anonymous", ACCOUNT_TEXT, ACCOUNT_LONGTEXT, false ) add_shortcut( "ftp", "ftps", "ftpes" ) set_callbacks( InOpen, InClose ) #ifdef ENABLE_SOUT add_submodule () set_shortname( "FTP" ) set_description( N_("FTP upload output") ) set_capability( "sout access", 0 ) set_category( CAT_SOUT ) set_subcategory( SUBCAT_SOUT_ACO ) add_shortcut( "ftp", "ftps", "ftpes" ) set_callbacks( OutOpen, OutClose ) #endif vlc_module_end () /***************************************************************************** * Local prototypes *****************************************************************************/ static ssize_t Read( stream_t *, void *, size_t ); static int Seek( stream_t *, uint64_t ); static int Control( stream_t *, int, va_list ); static int DirRead( stream_t *, input_item_node_t * ); #ifdef ENABLE_SOUT static int OutSeek( sout_access_out_t *, off_t ); static ssize_t Write( sout_access_out_t *, block_t * ); #endif static int LoginUserPwd( vlc_object_t *, access_sys_t *, const char *, const char *, bool * ); static void FeaturesCheck( void *, const char * ); typedef struct ftp_features_t { bool b_unicode; bool b_authtls; bool b_mlst; } ftp_features_t; enum tls_mode_e { NONE = 0, IMPLICIT,/* ftps */ EXPLICIT /* ftpes */ }; struct access_sys_t { vlc_url_t url; ftp_features_t features; vlc_tls_creds_t *p_creds; enum tls_mode_e tlsmode; vlc_tls_t *cmd; vlc_tls_t *data; char sz_epsv_ip[NI_MAXNUMERICHOST]; bool out; uint64_t offset; uint64_t size; }; #define GET_OUT_SYS( p_this ) \ ((access_sys_t *)(((sout_access_out_t *)(p_this))->p_sys)) static int ftp_SendCommand( vlc_object_t *obj, access_sys_t *sys, const char *fmt, ... ) { size_t fmtlen = strlen( fmt ); char fmtbuf[fmtlen + 3]; memcpy( fmtbuf, fmt, fmtlen ); memcpy( fmtbuf + fmtlen, "\r\n", 3 ); va_list args; char *cmd; int val; va_start( args, fmt ); val = vasprintf( &cmd, fmtbuf, args ); va_end( args ); if( unlikely(val == -1) ) return -1; if( strncmp( cmd, "PASS ", 5 ) && strncmp( cmd, "ACCT ", 5 ) ) msg_Dbg( obj, "sending request: \"%.*s\" (%d bytes)", val-2, cmd, val ); else msg_Dbg( obj, "sending request: \"%.*s XXXX\" (XX bytes)", 4, cmd ); if( vlc_tls_Write( sys->cmd, cmd, val ) != val ) { msg_Err( obj, "request failure" ); val = -1; } else val = 0; free( cmd ); return val; } static char *ftp_GetLine( vlc_object_t *obj, access_sys_t *sys ) { char *resp = vlc_tls_GetLine( sys->cmd ); if( resp == NULL ) msg_Err( obj, "response failure" ); return resp; } /* TODO support this s**t : RFC 959 allows the client to send certain TELNET strings at any moment, even in the middle of a request: * \377\377. * \377\376x where x is one byte. * \377\375x where x is one byte. The server is obliged to send \377\374x * immediately after reading x. * \377\374x where x is one byte. * \377\373x where x is one byte. The server is obliged to send \377\376x * immediately after reading x. * \377x for any other byte x. These strings are not part of the requests, except in the case \377\377, where the request contains one \377. */ static int ftp_RecvReply( vlc_object_t *obj, access_sys_t *sys, char **restrict strp, void (*cb)(void *, const char *), void *opaque ) { char *resp = ftp_GetLine( obj, sys ); if( resp == NULL ) return -1; char *end; unsigned code = strtoul( resp, &end, 10 ); if( (end - resp) != 3 || (*end != '-' && *end != ' ') ) { msg_Err( obj, "malformatted response" ); goto error; } msg_Dbg( obj, "received response: \"%s\"", resp ); if( *end == '-' ) /* Multi-line response */ { bool done; *end = ' '; do { char *line = ftp_GetLine( obj, sys ); if( line == NULL ) goto error; done = !strncmp( resp, line, 4 ); if( !done ) cb( opaque, line ); free( line ); } while( !done ); } if( strp != NULL ) *strp = resp; else free( resp ); return code; error: free( resp ); return -1; } static int ftp_RecvAnswer( vlc_object_t *obj, access_sys_t *sys, int *restrict codep, char **restrict strp, void (*cb)(void *, const char *), void *opaque ) { char *str; int val = ftp_RecvReply( obj, sys, &str, cb, opaque ); if( (val / 100) == 1 ) { /* There can be zero or one preliminary reply per command */ free( str ); val = ftp_RecvReply( obj, sys, &str, cb, opaque ); } if( val >= 0 ) { if( codep != NULL ) *codep = val; if( strp != NULL ) *strp = str; else free( str ); val /= 100; } else { if( codep != NULL ) *codep = 500; if( strp != NULL ) *strp = NULL; } return val; } static void DummyLine( void *data, const char *str ) { (void) data; (void) str; } static int ftp_RecvCommand( vlc_object_t *obj, access_sys_t *sys, int *restrict codep, char **restrict strp ) { return ftp_RecvAnswer( obj, sys, codep, strp, DummyLine, NULL ); } static int ftp_RecvCommandInit( vlc_object_t *obj, access_sys_t *sys ) { int val = ftp_RecvReply( obj, sys, NULL, DummyLine, NULL ); if( val >= 0 ) val /= 100; return val; } static int ftp_StartStream( vlc_object_t *, access_sys_t *, uint64_t, bool ); static int ftp_StopStream ( vlc_object_t *, access_sys_t * ); static int readTLSMode( vlc_object_t *obj, access_sys_t *p_sys, const char * psz_access ) { if ( !strncmp( psz_access, "ftps", 4 ) ) p_sys->tlsmode = IMPLICIT; else if ( !strncmp( psz_access, "ftpes", 5 ) ) p_sys->tlsmode = EXPLICIT; else { p_sys->p_creds = NULL; p_sys->tlsmode = NONE; return 0; } p_sys->p_creds = vlc_tls_ClientCreate( obj ); return (p_sys->p_creds != NULL) ? 0 : -1; } static int createCmdTLS( vlc_object_t *p_access, access_sys_t *p_sys, const char *psz_session_name ) { /* TLS/SSL handshake */ vlc_tls_t *secure = vlc_tls_ClientSessionCreate( p_sys->p_creds, p_sys->cmd, p_sys->url.psz_host, psz_session_name, NULL, NULL ); if( secure == NULL ) { msg_Err( p_access, "cannot establish FTP/TLS session on command channel" ); return -1; } p_sys->cmd = secure; return 0; } static void clearCmd( access_sys_t *p_sys ) { if( p_sys->cmd != NULL ) { vlc_tls_Close( p_sys->cmd ); p_sys->cmd = NULL; } } static int Login( vlc_object_t *p_access, access_sys_t *p_sys, const char *path ) { int i_answer; /* *** Open a TCP connection with server *** */ p_sys->cmd = vlc_tls_SocketOpenTCP( p_access, p_sys->url.psz_host, p_sys->url.i_port ); if( p_sys->cmd == NULL ) { msg_Err( p_access, "connection failed" ); vlc_dialog_display_error( p_access, _("Network interaction failed"), "%s", _("VLC could not connect with the given server.") ); goto error; } if ( p_sys->tlsmode == IMPLICIT ) /* FTPS Mode */ { if ( createCmdTLS( p_access, p_sys, "ftps") < 0 ) goto error; } while( ftp_RecvCommand( p_access, p_sys, &i_answer, NULL ) == 1 ); if( i_answer / 100 != 2 ) { msg_Err( p_access, "connection rejected" ); vlc_dialog_display_error( p_access, _("Network interaction failed"), "%s", _("VLC's connection to the given server was rejected.") ); goto error; } msg_Dbg( p_access, "connection accepted (%d)", i_answer ); /* Features check first */ if( ftp_SendCommand( p_access, p_sys, "FEAT" ) < 0 || ftp_RecvAnswer( p_access, p_sys, NULL, NULL, FeaturesCheck, &p_sys->features ) < 0 ) { msg_Err( p_access, "cannot get server features" ); goto error; } /* Create TLS Session */ if( p_sys->tlsmode == EXPLICIT ) { if ( ! p_sys->features.b_authtls ) { msg_Err( p_access, "Server does not support TLS" ); goto error; } if( ftp_SendCommand( p_access, p_sys, "AUTH TLS" ) < 0 || ftp_RecvCommand( p_access, p_sys, &i_answer, NULL ) < 0 || i_answer != 234 ) { msg_Err( p_access, "cannot switch to TLS: server replied with code %d", i_answer ); goto error; } if( createCmdTLS( p_access, p_sys, "ftpes") < 0 ) { goto error; } } if( p_sys->tlsmode != NONE ) { if( ftp_SendCommand( p_access, p_sys, "PBSZ 0" ) < 0 || ftp_RecvCommand( p_access, p_sys, &i_answer, NULL ) < 0 || i_answer != 200 ) { msg_Err( p_access, "Can't truncate Protection buffer size for TLS" ); goto error; } if( ftp_SendCommand( p_access, p_sys, "PROT P" ) < 0 || ftp_RecvCommand( p_access, p_sys, &i_answer, NULL ) < 0 || i_answer != 200 ) { msg_Err( p_access, "Can't set Data channel protection" ); goto error; } } vlc_url_t url; vlc_credential credential; if( vlc_UrlParseFixup( &url, path ) != 0 ) { vlc_UrlClean( &url ); goto error; } vlc_credential_init( &credential, &url ); bool b_logged = false; /* First: try credentials from url / option */ vlc_credential_get( &credential, p_access, "ftp-user", "ftp-pwd", NULL, NULL ); do { const char *psz_username = credential.psz_username; if( psz_username == NULL ) /* use anonymous by default */ psz_username = "anonymous"; if( LoginUserPwd( p_access, p_sys, psz_username, credential.psz_password, &b_logged ) != 0 || b_logged ) break; } while( vlc_credential_get( &credential, p_access, "ftp-user", "ftp-pwd", LOGIN_DIALOG_TITLE, LOGIN_DIALOG_TEXT, url.psz_host ) ); if( b_logged ) { vlc_credential_store( &credential, p_access ); vlc_credential_clean( &credential ); vlc_UrlClean( &url ); return 0; } vlc_credential_clean( &credential ); vlc_UrlClean( &url ); error: clearCmd( p_sys ); return -1; } static int LoginUserPwd( vlc_object_t *p_access, access_sys_t *p_sys, const char *psz_user, const char *psz_pwd, bool *p_logged ) { int i_answer; /* Send credentials over channel */ if( ftp_SendCommand( p_access, p_sys, "USER %s", psz_user ) < 0 || ftp_RecvCommand( p_access, p_sys, &i_answer, NULL ) < 0 ) return -1; switch( i_answer / 100 ) { case 2: /* X.509 auth successful after AUTH TLS / RFC 2228 sec. 4 */ if ( i_answer == 232 ) msg_Dbg( p_access, "user accepted and authenticated" ); else msg_Dbg( p_access, "user accepted" ); break; case 3: msg_Dbg( p_access, "password needed" ); if( ftp_SendCommand( p_access, p_sys, "PASS %s", psz_pwd ) < 0 || ftp_RecvCommand( p_access, p_sys, &i_answer, NULL ) < 0 ) return -1; switch( i_answer / 100 ) { case 2: msg_Dbg( p_access, "password accepted" ); break; case 3: { char *psz; msg_Dbg( p_access, "account needed" ); psz = var_InheritString( p_access, "ftp-account" ); if( ftp_SendCommand( p_access, p_sys, "ACCT %s", psz ) < 0 || ftp_RecvCommand( p_access, p_sys, &i_answer, NULL ) < 0 ) { free( psz ); return -1; } free( psz ); if( i_answer / 100 != 2 ) { msg_Err( p_access, "account rejected" ); vlc_dialog_display_error( p_access, _("Network interaction failed"), "%s", _("Your account was rejected.") ); return -1; } msg_Dbg( p_access, "account accepted" ); break; } default: msg_Warn( p_access, "password rejected" ); *p_logged = false; return 0; } break; default: msg_Warn( p_access, "user rejected" ); *p_logged = false; return 0; } *p_logged = true; return 0; } static void FeaturesCheck( void *opaque, const char *feature ) { ftp_features_t *features = opaque; if( strcasestr( feature, "UTF8" ) != NULL ) features->b_unicode = true; else if( strcasestr( feature, "AUTH TLS" ) != NULL ) features->b_authtls = true; if( strcasestr( feature, "MLST" ) != NULL ) features->b_mlst = true; } static const char *IsASCII( const char *str ) { int8_t c; for( const char *p = str; (c = *p) != '\0'; p++ ) if( c < 0 ) return NULL; return str; } static int Connect( vlc_object_t *p_access, access_sys_t *p_sys, const char *path ) { if( Login( p_access, p_sys, path ) < 0 ) return -1; /* Extended passive mode */ if( ftp_SendCommand( p_access, p_sys, "EPSV ALL" ) < 0 ) { msg_Err( p_access, "cannot request extended passive mode" ); goto error; } if( ftp_RecvCommand( p_access, p_sys, NULL, NULL ) == 2 ) { int fd = vlc_tls_GetFD(p_sys->cmd); if( net_GetPeerAddress( fd, p_sys->sz_epsv_ip, NULL ) ) goto error; } else { /* If ESPV ALL fails, we fallback to PASV. * We have to restart the connection in case there is a NAT that * understands EPSV ALL in the way, and hence won't allow PASV on * the initial connection. */ msg_Info( p_access, "FTP Extended passive mode disabled" ); clearCmd( p_sys ); if( Login( p_access, p_sys, path ) ) goto error; } if( p_sys->url.psz_path && (p_sys->features.b_unicode ? IsUTF8 : IsASCII)(p_sys->url.psz_path) == NULL ) { msg_Err( p_access, "unsupported path: \"%s\"", p_sys->url.psz_path ); goto error; } /* check binary mode support */ if( ftp_SendCommand( p_access, p_sys, "TYPE I" ) < 0 || ftp_RecvCommand( p_access, p_sys, NULL, NULL ) != 2 ) { msg_Err( p_access, "cannot set binary transfer mode" ); goto error; } return 0; error: clearCmd( p_sys ); return -1; } static int parseURL( vlc_url_t *url, const char *path, enum tls_mode_e mode ) { if( path == NULL ) return VLC_EGENERIC; /* *** Parse URL and get server addr/port and path *** */ while( *path == '/' ) path++; vlc_UrlParseFixup( url, path ); if( url->psz_host == NULL || *url->psz_host == '\0' ) return VLC_EGENERIC; if( url->i_port <= 0 ) { if( mode == IMPLICIT ) url->i_port = IPPORT_FTPS; else url->i_port = IPPORT_FTP; /* default port */ } if( url->psz_path == NULL ) return VLC_SUCCESS; /* FTP URLs are relative to user's default directory (RFC1738 §3.2) For absolute path use ftp://foo.bar//usr/local/etc/filename */ /* FIXME: we should issue a series of CWD, one per slash */ if( url->psz_path ) { assert( url->psz_path[0] == '/' ); url->psz_path++; } char *type = strstr( url->psz_path, ";type=" ); if( type ) { *type = '\0'; if( strchr( "iI", type[6] ) == NULL ) return VLC_EGENERIC; /* ASCII and directory not supported */ } vlc_uri_decode( url->psz_path ); return VLC_SUCCESS; } /**************************************************************************** * Open: connect to ftp server and ask for file ****************************************************************************/ static int InOpen( vlc_object_t *p_this ) { stream_t *p_access = (stream_t*)p_this; access_sys_t *p_sys; char *psz_arg; bool b_directory; /* Init p_access */ p_sys = p_access->p_sys = (access_sys_t*)vlc_obj_calloc( p_this, 1, sizeof( access_sys_t ) ); if( !p_sys ) return VLC_ENOMEM; p_sys->data = NULL; p_sys->out = false; p_sys->offset = 0; p_sys->size = UINT64_MAX; if( readTLSMode( p_this, p_sys, p_access->psz_name ) ) goto exit_error; if( parseURL( &p_sys->url, p_access->psz_url, p_sys->tlsmode ) ) goto exit_error; if( Connect( p_this, p_sys, p_access->psz_url ) ) goto exit_error; do { /* get size */ if( p_sys->url.psz_path == NULL || !*p_sys->url.psz_path ) { b_directory = true; break; } if( ftp_SendCommand( p_this, p_sys, "SIZE %s", p_sys->url.psz_path ) < 0 ) goto error; int val = ftp_RecvCommand( p_this, p_sys, NULL, &psz_arg ); if( val == 2 ) { b_directory = false; p_sys->size = atoll( &psz_arg[4] ); free( psz_arg ); msg_Dbg( p_access, "file size: %"PRIu64, p_sys->size ); break; } if( val >= 0 ) free( psz_arg ); if( ftp_SendCommand( p_this, p_sys, "CWD %s", p_sys->url.psz_path ) < 0 ) goto error; if( ftp_RecvCommand( p_this, p_sys, NULL, NULL ) == 2 ) { b_directory = true; break; } msg_Err( p_this, "file or directory does not exist" ); goto error; } while (0); if( b_directory ) { p_access->pf_readdir = DirRead; p_access->pf_control = access_vaDirectoryControlHelper; } else ACCESS_SET_CALLBACKS( Read, NULL, Control, Seek ); \ /* Start the 'stream' */ if( ftp_StartStream( p_this, p_sys, 0, b_directory ) < 0 ) { msg_Err( p_this, "cannot retrieve file" ); goto error; } return VLC_SUCCESS; error: clearCmd( p_sys ); exit_error: vlc_UrlClean( &p_sys->url ); vlc_tls_Delete( p_sys->p_creds ); return VLC_EGENERIC; } #ifdef ENABLE_SOUT static int OutOpen( vlc_object_t *p_this ) { sout_access_out_t *p_access = (sout_access_out_t *)p_this; access_sys_t *p_sys; p_sys = vlc_obj_calloc( p_this, 1, sizeof( *p_sys ) ); if( !p_sys ) return VLC_ENOMEM; /* Init p_access */ p_sys->data = NULL; p_sys->out = true; if( readTLSMode( p_this, p_sys, p_access->psz_access ) ) goto exit_error; if( parseURL( &p_sys->url, p_access->psz_path, p_sys->tlsmode ) ) goto exit_error; if( p_sys->url.psz_path == NULL ) { msg_Err( p_this, "no filename specified" ); goto exit_error; } if( Connect( p_this, p_sys, p_access->psz_path ) ) goto exit_error; /* Start the 'stream' */ if( ftp_StartStream( p_this, p_sys, 0, false ) < 0 ) { msg_Err( p_access, "cannot store file" ); clearCmd( p_sys ); goto exit_error; } p_access->pf_seek = OutSeek; p_access->pf_write = Write; p_access->p_sys = (void *)p_sys; return VLC_SUCCESS; exit_error: vlc_UrlClean( &p_sys->url ); vlc_tls_Delete( p_sys->p_creds ); return VLC_EGENERIC; } #endif /***************************************************************************** * Close: free unused data structures *****************************************************************************/ static void Close( vlc_object_t *p_access, access_sys_t *p_sys ) { msg_Dbg( p_access, "stopping stream" ); ftp_StopStream( p_access, p_sys ); if( ftp_SendCommand( p_access, p_sys, "QUIT" ) < 0 ) { msg_Warn( p_access, "cannot quit" ); } else { ftp_RecvCommand( p_access, p_sys, NULL, NULL ); } clearCmd( p_sys ); /* free memory */ vlc_UrlClean( &p_sys->url ); vlc_tls_Delete( p_sys->p_creds ); } static void InClose( vlc_object_t *p_this ) { Close( p_this, ((stream_t *)p_this)->p_sys); } #ifdef ENABLE_SOUT static void OutClose( vlc_object_t *p_this ) { Close( p_this, GET_OUT_SYS(p_this)); } #endif /***************************************************************************** * Seek: try to go at the right place *****************************************************************************/ static int SeekCommon( vlc_object_t *p_access, access_sys_t *p_sys, uint64_t i_pos ) { msg_Dbg( p_access, "seeking to %"PRIu64, i_pos ); ftp_StopStream( p_access, p_sys ); if( ftp_StartStream( p_access, p_sys, i_pos, false ) < 0 ) return VLC_EGENERIC; return VLC_SUCCESS; } static int Seek( stream_t *p_access, uint64_t i_pos ) { access_sys_t *p_sys = p_access->p_sys; int val = SeekCommon( (vlc_object_t *)p_access, p_sys, i_pos ); if( val ) return val; p_sys->offset = i_pos; return VLC_SUCCESS; } #ifdef ENABLE_SOUT static int OutSeek( sout_access_out_t *p_access, off_t i_pos ) { return SeekCommon((vlc_object_t *)p_access, GET_OUT_SYS(p_access), i_pos); } #endif /***************************************************************************** * Read: *****************************************************************************/ static ssize_t Read( stream_t *p_access, void *p_buffer, size_t i_len ) { access_sys_t *p_sys = p_access->p_sys; if( p_sys->data == NULL ) return 0; assert( !p_sys->out ); ssize_t i_read = vlc_tls_Read( p_sys->data, p_buffer, i_len, false ); if( i_read >= 0 ) p_sys->offset += i_read; else if( errno != EINTR && errno != EAGAIN ) { msg_Err( p_access, "receive error: %s", vlc_strerror_c(errno) ); i_read = 0; } return i_read; } /** * Parse MLST facts list * * Parses a MLST facts list (without the trailing space/filename) * pointed to by linep and fills the key/value variables. * If a not properly formatted fact is encountered, the * whole fact value will be in key and val will be NULL. * * \note This function modifies the linep pointer, so * the original value for it must be saved to free * it once done. * \retval false if at the end of the list * \retval true if there are more list items to process */ static bool mlst_facts_iter(char **linep, const char **key, const char **val) { // MLST format parsed here is 'key=val;key=val...;' // Lack of trailing ; at the end is accepted too, even though // not permitted by the standard. char *fact = strsep(linep, ";"); *key = NULL; *val = NULL; if (fact == NULL || fact[0] == '\0') return false; // Separate key and value char *sep = strchr(fact, '='); if (sep) { *sep++ = '\0'; } *key = fact; *val = sep; return true; } /***************************************************************************** * DirRead: *****************************************************************************/ static int DirRead (stream_t *p_access, input_item_node_t *p_current_node) { access_sys_t *p_sys = p_access->p_sys; int i_ret = VLC_SUCCESS; assert( p_sys->data != NULL ); assert( !p_sys->out ); struct vlc_readdir_helper rdh; vlc_readdir_helper_init( &rdh, p_access, p_current_node ); while (i_ret == VLC_SUCCESS) { char *psz_file; int type = ITEM_TYPE_UNKNOWN; char *psz_line = vlc_tls_GetLine( p_sys->data ); if( psz_line == NULL ) break; if( p_sys->features.b_mlst ) { const char *key, *val; char *facts = psz_line; // Separate MLST and filename psz_file = strchr(psz_line, ' '); if (likely(psz_file)) { *psz_file++ = '\0'; } else { msg_Warn( p_access, "No filename in MLST list found" ); free( psz_line ); continue; } while (mlst_facts_iter( &facts, &key, &val )) { if (val == NULL) { msg_Warn( p_access, "Skipping invalid MLST fact '%s'", key); continue; } if (!vlc_ascii_strcasecmp( key, "type" )) { if (!vlc_ascii_strcasecmp( val, "dir" )) type = ITEM_TYPE_DIRECTORY; else if (!vlc_ascii_strcasecmp( val, "file" )) type = ITEM_TYPE_FILE; } } } else psz_file = psz_line; char *psz_uri; char *psz_filename = vlc_uri_encode( psz_file ); if( psz_filename != NULL && asprintf( &psz_uri, "%s://%s:%d%s%s/%s", ( p_sys->tlsmode == NONE ) ? "ftp" : ( ( p_sys->tlsmode == IMPLICIT ) ? "ftps" : "ftpes" ), p_sys->url.psz_host, p_sys->url.i_port, p_sys->url.psz_path ? "/" : "", p_sys->url.psz_path ? p_sys->url.psz_path : "", psz_filename ) != -1 ) { i_ret = vlc_readdir_helper_additem( &rdh, psz_uri, NULL, psz_file, type, ITEM_NET ); free( psz_uri ); } free( psz_filename ); free( psz_line ); } vlc_readdir_helper_finish( &rdh, i_ret == VLC_SUCCESS ); return i_ret; } /***************************************************************************** * Write: *****************************************************************************/ #ifdef ENABLE_SOUT static ssize_t Write( sout_access_out_t *p_access, block_t *p_buffer ) { access_sys_t *p_sys = GET_OUT_SYS(p_access); size_t i_write = 0; assert( p_sys->data != NULL ); while( p_buffer != NULL ) { block_t *p_next = p_buffer->p_next; i_write += vlc_tls_Write( p_sys->data, p_buffer->p_buffer, p_buffer->i_buffer ); block_Release( p_buffer ); p_buffer = p_next; } return i_write; } #endif /***************************************************************************** * Control: *****************************************************************************/ static int Control( stream_t *p_access, int i_query, va_list args ) { access_sys_t *sys = p_access->p_sys; bool *pb_bool; int64_t *pi_64; switch( i_query ) { case STREAM_CAN_SEEK: pb_bool = va_arg( args, bool * ); *pb_bool = true; break; case STREAM_CAN_FASTSEEK: pb_bool = va_arg( args, bool * ); *pb_bool = false; break; case STREAM_CAN_PAUSE: pb_bool = va_arg( args, bool * ); *pb_bool = true; /* FIXME */ break; case STREAM_CAN_CONTROL_PACE: pb_bool = va_arg( args, bool * ); *pb_bool = true; /* FIXME */ break; case STREAM_GET_SIZE: if( sys->size == UINT64_MAX ) return VLC_EGENERIC; *va_arg( args, uint64_t * ) = sys->size; break; case STREAM_GET_PTS_DELAY: pi_64 = va_arg( args, int64_t * ); *pi_64 = INT64_C(1000) * var_InheritInteger( p_access, "network-caching" ); break; case STREAM_SET_PAUSE_STATE: pb_bool = va_arg( args, bool * ); if ( !pb_bool ) return Seek( p_access, sys->offset ); break; default: return VLC_EGENERIC; } return VLC_SUCCESS; } static int ftp_StartStream( vlc_object_t *p_access, access_sys_t *p_sys, uint64_t i_start, bool b_directory ) { char psz_ipv4[16], *psz_ip = p_sys->sz_epsv_ip; int i_answer; char *psz_arg, *psz_parser; int i_port; assert( p_sys->data == NULL ); if( ( ftp_SendCommand( p_access, p_sys, *psz_ip ? "EPSV" : "PASV" ) < 0 ) || ( ftp_RecvCommand( p_access, p_sys, &i_answer, &psz_arg ) != 2 ) ) { msg_Err( p_access, "cannot set passive mode" ); return VLC_EGENERIC; } psz_parser = strchr( psz_arg, '(' ); if( psz_parser == NULL ) { free( psz_arg ); msg_Err( p_access, "cannot parse passive mode response" ); return VLC_EGENERIC; } if( *psz_ip ) { if( sscanf( psz_parser, "(%*3c%u", &i_port ) < 1 ) { free( psz_arg ); msg_Err( p_access, "cannot parse passive mode response" ); return VLC_EGENERIC; } } else { unsigned a1, a2, a3, a4, p1, p2; if( ( sscanf( psz_parser, "(%u,%u,%u,%u,%u,%u", &a1, &a2, &a3, &a4, &p1, &p2 ) < 6 ) || ( a1 > 255 ) || ( a2 > 255 ) || ( a3 > 255 ) || ( a4 > 255 ) || ( p1 > 255 ) || ( p2 > 255 ) ) { free( psz_arg ); msg_Err( p_access, "cannot parse passive mode response" ); return VLC_EGENERIC; } sprintf( psz_ipv4, "%u.%u.%u.%u", a1, a2, a3, a4 ); psz_ip = psz_ipv4; i_port = (p1 << 8) | p2; } free( psz_arg ); msg_Dbg( p_access, "ip:%s port:%d", psz_ip, i_port ); if( ftp_SendCommand( p_access, p_sys, "TYPE I" ) < 0 || ftp_RecvCommand( p_access, p_sys, &i_answer, NULL ) != 2 ) { msg_Err( p_access, "cannot set binary transfer mode" ); return VLC_EGENERIC; } if( i_start > 0 ) { if( ftp_SendCommand( p_access, p_sys, "REST %"PRIu64, i_start ) < 0 || ftp_RecvCommand( p_access, p_sys, &i_answer, NULL ) > 3 ) { msg_Err( p_access, "cannot set restart offset" ); return VLC_EGENERIC; } } msg_Dbg( p_access, "waiting for data connection..." ); p_sys->data = vlc_tls_SocketOpenTCP( p_access, psz_ip, i_port ); if( p_sys->data == NULL ) { msg_Err( p_access, "failed to connect with server" ); return VLC_EGENERIC; } msg_Dbg( p_access, "connection with \"%s:%d\" successful", psz_ip, i_port ); if( b_directory ) { if( p_sys->features.b_mlst && ftp_SendCommand( p_access, p_sys, "MLSD" ) >= 0 && ftp_RecvCommandInit( p_access, p_sys ) == 1 ) { msg_Dbg( p_access, "Using MLST extension to list" ); } else if( ftp_SendCommand( p_access, p_sys, "NLST" ) < 0 || ftp_RecvCommandInit( p_access, p_sys ) != 1 ) { msg_Err( p_access, "cannot list directory contents" ); return VLC_EGENERIC; } } else { /* "1xx" message */ assert( p_sys->url.psz_path ); if( ftp_SendCommand( p_access, p_sys, "%s %s", p_sys->out ? "STOR" : "RETR", p_sys->url.psz_path ) < 0 || ftp_RecvCommandInit( p_access, p_sys ) != 1 ) { msg_Err( p_access, "cannot retrieve file" ); return VLC_EGENERIC; } } if( p_sys->tlsmode != NONE ) { /* FIXME: Do Reuse TLS Session */ /* TLS/SSL handshake */ vlc_tls_t *secure = vlc_tls_ClientSessionCreate( p_sys->p_creds, p_sys->data, p_sys->url.psz_host, ( p_sys->tlsmode == EXPLICIT ) ? "ftpes-data" : "ftps-data", NULL, NULL ); if( secure == NULL ) { msg_Err( p_access, "cannot establish FTP/TLS session for data" \ ": server not allowing new session ?" ); return VLC_EGENERIC; } p_sys->data = secure; } return VLC_SUCCESS; } static int ftp_StopStream ( vlc_object_t *p_access, access_sys_t *p_sys ) { int ret = VLC_SUCCESS; if( ftp_SendCommand( p_access, p_sys, "ABOR" ) < 0 ) { msg_Warn( p_access, "cannot abort file" ); ret = VLC_EGENERIC; } if( p_sys->data != NULL ) { vlc_tls_Close( p_sys->data ); p_sys->data = NULL; if( ret == VLC_SUCCESS ) /* Read the final response from RETR/STOR, i.e. 426 or 226 */ ftp_RecvCommand( p_access, p_sys, NULL, NULL ); } if( ret == VLC_SUCCESS ) /* Read the response from ABOR, i.e. 226 or 225 */ ftp_RecvCommand( p_access, p_sys, NULL, NULL ); return ret; }