[5d550c5] | 1 | /***************************************************************************\ |
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| 2 | * * |
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| 3 | * BitlBee - An IRC to IM gateway * |
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| 4 | * Utility functions for file transfer * |
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| 5 | * * |
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| 6 | * Copyright 2008 Uli Meis <a.sporto+bee@gmail.com> * |
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| 7 | * * |
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| 8 | * This program is free software; you can redistribute it and/or modify * |
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| 9 | * it under the terms of the GNU General Public License as published by * |
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| 10 | * the Free Software Foundation; either version 2 of the License, or * |
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| 11 | * (at your option) any later version. * |
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| 12 | * * |
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| 13 | * This program is distributed in the hope that it will be useful, * |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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| 16 | * GNU General Public License for more details. * |
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| 17 | * * |
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| 18 | * You should have received a copy of the GNU General Public License along * |
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| 19 | * with this program; if not, write to the Free Software Foundation, Inc., * |
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| 20 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * |
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| 21 | * * |
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| 22 | \***************************************************************************/ |
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| 23 | |
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| 24 | #define BITLBEE_CORE |
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| 25 | #include "bitlbee.h" |
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| 26 | #include <poll.h> |
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| 27 | #include <netinet/tcp.h> |
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| 28 | #include "lib/ftutil.h" |
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| 29 | |
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| 30 | /* Some ifdefs for ulibc and apparently also BSD (Thanks to Whoopie) */ |
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| 31 | #ifndef HOST_NAME_MAX |
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| 32 | #include <sys/param.h> |
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| 33 | #ifdef MAXHOSTNAMELEN |
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| 34 | #define HOST_NAME_MAX MAXHOSTNAMELEN |
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| 35 | #else |
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| 36 | #define HOST_NAME_MAX 255 |
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| 37 | #endif |
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| 38 | #endif |
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| 39 | |
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| 40 | #ifndef AI_NUMERICSERV |
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| 41 | #define AI_NUMERICSERV 0x0400 /* Don't use name resolution. */ |
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| 42 | #endif |
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| 43 | |
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| 44 | #define ASSERTSOCKOP(op, msg) \ |
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| 45 | if( (op) == -1 ) {\ |
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| 46 | sprintf( errmsg , msg ": %s", strerror( errno ) ); \ |
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| 47 | return -1; } |
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| 48 | |
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| 49 | /* |
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| 50 | * Creates a listening socket and returns it in saddr_ptr. |
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| 51 | */ |
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| 52 | int ft_listen( struct sockaddr_storage *saddr_ptr, char *hostp, char *port, int for_bitlbee_client, char **errptr ) |
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| 53 | { |
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| 54 | int fd,gret,saddrlen; |
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| 55 | struct addrinfo hints, *rp; |
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| 56 | socklen_t ssize = sizeof( struct sockaddr_storage ); |
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| 57 | struct sockaddr_storage saddrs, *saddr = &saddrs; |
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| 58 | static char errmsg[1024]; |
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| 59 | char host[ HOST_NAME_MAX + 1 ]; |
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| 60 | char *ftlisten = global.conf->ft_listen; |
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| 61 | |
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| 62 | *errptr = errmsg; |
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| 63 | |
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| 64 | sprintf( port, "0" ); |
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| 65 | |
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| 66 | /* Format is <IP-A>[:<Port-A>];<IP-B>[:<Port-B>] where |
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| 67 | * A is for connections with the bitlbee client (DCC) |
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| 68 | * and B is for connections with IM peers. |
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| 69 | */ |
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| 70 | if( ftlisten ) { |
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| 71 | char *scolon = strchr( ftlisten, ';' ); |
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| 72 | char *colon; |
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| 73 | |
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| 74 | if( scolon ) { |
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| 75 | if( for_bitlbee_client ) { |
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| 76 | *scolon = '\0'; |
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| 77 | sprintf( host, ftlisten ); |
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| 78 | *scolon = ';'; |
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| 79 | } else { |
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| 80 | sprintf( host, scolon + 1 ); |
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| 81 | } |
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| 82 | } else { |
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| 83 | sprintf( host, ftlisten ); |
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| 84 | } |
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| 85 | |
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| 86 | if( ( colon = strchr( host, ':' ) ) ) { |
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| 87 | *colon = '\0'; |
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| 88 | sprintf( port, colon + 1 ); |
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| 89 | } |
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| 90 | } else { |
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| 91 | ASSERTSOCKOP( gethostname( host, HOST_NAME_MAX + 1 ), "gethostname()" ); |
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| 92 | } |
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| 93 | |
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| 94 | memset( &hints, 0, sizeof( struct addrinfo ) ); |
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| 95 | hints.ai_socktype = SOCK_STREAM; |
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| 96 | hints.ai_flags = AI_NUMERICSERV; |
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| 97 | |
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| 98 | if ( ( gret = getaddrinfo( host, port, &hints, &rp ) ) != 0 ) { |
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| 99 | sprintf( errmsg, "getaddrinfo() failed: %s", gai_strerror( gret ) ); |
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| 100 | return -1; |
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| 101 | } |
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| 102 | |
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| 103 | saddrlen = rp->ai_addrlen; |
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| 104 | |
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| 105 | memcpy( saddr, rp->ai_addr, saddrlen ); |
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| 106 | |
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| 107 | freeaddrinfo( rp ); |
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| 108 | |
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| 109 | ASSERTSOCKOP( fd = socket( saddr->ss_family, SOCK_STREAM, 0 ), "Opening socket" ); |
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| 110 | |
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| 111 | ASSERTSOCKOP( bind( fd, ( struct sockaddr *)saddr, saddrlen ), "Binding socket" ); |
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| 112 | |
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| 113 | ASSERTSOCKOP( listen( fd, 1 ), "Making socket listen" ); |
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| 114 | |
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| 115 | if ( !inet_ntop( saddr->ss_family, saddr->ss_family == AF_INET ? |
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| 116 | ( void * )&( ( struct sockaddr_in * ) saddr )->sin_addr.s_addr : ( void * )&( ( struct sockaddr_in6 * ) saddr )->sin6_addr.s6_addr |
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| 117 | , host, INET6_ADDRSTRLEN ) ) { |
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| 118 | sprintf( errmsg, "inet_ntop failed on listening socket" ); |
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| 119 | return -1; |
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| 120 | } |
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| 121 | |
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| 122 | ASSERTSOCKOP( getsockname( fd, ( struct sockaddr *)saddr, &ssize ), "Getting socket name" ); |
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| 123 | |
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| 124 | if( saddr->ss_family == AF_INET ) |
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| 125 | sprintf( port, "%d", ntohs( ( ( struct sockaddr_in *) saddr )->sin_port ) ); |
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| 126 | else |
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| 127 | sprintf( port, "%d", ntohs( ( ( struct sockaddr_in6 *) saddr )->sin6_port ) ); |
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| 128 | |
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| 129 | if( saddr_ptr ) |
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| 130 | memcpy( saddr_ptr, saddr, saddrlen ); |
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| 131 | |
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| 132 | strcpy( hostp, host ); |
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| 133 | |
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| 134 | return fd; |
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| 135 | } |
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