[0] | 1 | //socket.c: |
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| 2 | |
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[690] | 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008 |
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| 5 | * |
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| 6 | * This file is part of libroar a part of RoarAudio, |
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| 7 | * a cross-platform sound system for both, home and professional use. |
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| 8 | * See README for details. |
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| 9 | * |
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| 10 | * This file is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License version 3 |
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| 12 | * as published by the Free Software Foundation. |
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| 13 | * |
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| 14 | * libroar is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this software; see the file COPYING. If not, write to |
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| 21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 22 | * |
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| 23 | * NOTE for everyone want's to change something and send patches: |
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| 24 | * read README and HACKING! There a addition information on |
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| 25 | * the license of this document you need to read before you send |
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| 26 | * any patches. |
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| 27 | * |
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| 28 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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| 29 | * or libpulse*: |
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| 30 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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| 31 | * and are therefore GPL. Because of this it may be illigal to use |
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| 32 | * them with any software that uses libesd, libartsc or libpulse*. |
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| 33 | */ |
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| 34 | |
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[0] | 35 | #include "libroar.h" |
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| 36 | |
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[81] | 37 | #define MODE_LISTEN ROAR_SOCKET_MODE_LISTEN |
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| 38 | #define MODE_CONNECT ROAR_SOCKET_MODE_CONNECT |
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[0] | 39 | |
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| 40 | int roar_socket_new_tcp (void) { |
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| 41 | int fh; |
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[234] | 42 | int opt = IPTOS_LOWDELAY; |
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[0] | 43 | |
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| 44 | fh = socket(PF_INET, SOCK_STREAM, 0); |
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| 45 | |
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[234] | 46 | setsockopt(fh, IPPROTO_IP, IP_TOS, &opt, sizeof(int)); |
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| 47 | |
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[0] | 48 | return fh; |
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| 49 | } |
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| 50 | |
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[374] | 51 | int roar_socket_new_udp (void) { |
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| 52 | int fh; |
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| 53 | int opt = IPTOS_LOWDELAY; |
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| 54 | |
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| 55 | fh = socket(PF_INET, SOCK_DGRAM, 0); |
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| 56 | |
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| 57 | setsockopt(fh, IPPROTO_IP, IP_TOS, &opt, sizeof(int)); |
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| 58 | |
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| 59 | return fh; |
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| 60 | } |
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| 61 | |
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[509] | 62 | int roar_socket_new_tcp6 (void) { |
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| 63 | #ifdef PF_INET6 |
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| 64 | int fh; |
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| 65 | int opt = IPTOS_LOWDELAY; |
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| 66 | |
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| 67 | fh = socket(PF_INET6, SOCK_STREAM, 0); |
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| 68 | |
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| 69 | setsockopt(fh, IPPROTO_IP, IP_TOS, &opt, sizeof(int)); |
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| 70 | |
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| 71 | return fh; |
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| 72 | #else |
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| 73 | return -1; |
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| 74 | #endif |
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| 75 | } |
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| 76 | |
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| 77 | int roar_socket_new_udp6 (void) { |
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| 78 | #ifdef PF_INET6 |
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| 79 | int fh; |
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| 80 | int opt = IPTOS_LOWDELAY; |
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| 81 | |
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| 82 | fh = socket(PF_INET6, SOCK_DGRAM, 0); |
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| 83 | |
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| 84 | setsockopt(fh, IPPROTO_IP, IP_TOS, &opt, sizeof(int)); |
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| 85 | |
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| 86 | return fh; |
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| 87 | #else |
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| 88 | return -1; |
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| 89 | #endif |
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| 90 | } |
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| 91 | |
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[0] | 92 | int roar_socket_new_unix (void) { |
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| 93 | int fh; |
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[442] | 94 | #ifdef SO_PEERCRED |
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| 95 | int opt = 1; |
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| 96 | #endif |
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[0] | 97 | |
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| 98 | fh = socket(AF_UNIX, SOCK_STREAM, 0); |
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| 99 | |
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[442] | 100 | #ifdef SO_PEERCRED |
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| 101 | setsockopt(fh, SOL_SOCKET, SO_PASSCRED, &opt, sizeof(int)); |
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| 102 | #endif |
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| 103 | |
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[0] | 104 | return fh; |
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| 105 | } |
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| 106 | |
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[508] | 107 | int roar_socket_new_decnet_seqpacket (void) { |
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| 108 | #ifdef ROAR_HAVE_LIBDNET |
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| 109 | int fh; |
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| 110 | |
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| 111 | fh = socket(AF_DECnet, SOCK_SEQPACKET, DNPROTO_NSP); |
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| 112 | |
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| 113 | return fh; |
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| 114 | #else |
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| 115 | return -1; |
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| 116 | #endif |
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| 117 | } |
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| 118 | |
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| 119 | |
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| 120 | int roar_socket_new_decnet_stream (void) { |
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| 121 | #ifdef ROAR_HAVE_LIBDNET |
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| 122 | int fh; |
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| 123 | |
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| 124 | fh = socket(AF_DECnet, SOCK_STREAM, DNPROTO_NSP); |
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| 125 | |
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| 126 | return fh; |
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| 127 | #else |
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| 128 | return -1; |
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| 129 | #endif |
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| 130 | } |
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| 131 | |
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[528] | 132 | int roar_socket_new_ipxspx (void) { |
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| 133 | return -1; |
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| 134 | } |
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[508] | 135 | |
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[530] | 136 | int roar_socket_new_ipx (void) { |
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| 137 | #ifdef ROAR_HAVE_IPX |
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| 138 | return socket(AF_IPX, SOCK_DGRAM, AF_IPX); |
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| 139 | #else |
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| 140 | return -1; |
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| 141 | #endif |
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| 142 | } |
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| 143 | |
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| 144 | |
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[0] | 145 | int roar_socket_nonblock(int fh, int state) { |
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| 146 | int flags; |
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| 147 | |
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| 148 | if ( (flags = fcntl(fh, F_GETFL, 0)) == -1 ) { |
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| 149 | ROAR_ERR("roar_socket_nonblock(fh=%i, state=%i): Can not read flags: %s", fh, state, strerror(errno)); |
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| 150 | ROAR_DBG("roar_socket_nonblock(fh=%i, state=%i) = -1", fh, state); |
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| 151 | return -1; |
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| 152 | } |
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| 153 | |
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| 154 | flags |= O_NONBLOCK; |
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| 155 | |
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| 156 | if ( state == ROAR_SOCKET_BLOCK ) |
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| 157 | flags -= O_NONBLOCK; |
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| 158 | |
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| 159 | if ( fcntl(fh, F_SETFL, flags) == -1 ) { |
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| 160 | ROAR_ERR("roar_socket_nonblock(fh=%i, state=%i): Can not set flags: %s", fh, state, strerror(errno)); |
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| 161 | ROAR_DBG("roar_socket_nonblock(fh=%i, state=%i) = -1", fh, state); |
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| 162 | return -1; |
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| 163 | } |
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| 164 | |
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| 165 | ROAR_DBG("roar_socket_nonblock(fh=%i, state=%i) = 0", fh, state); |
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| 166 | return 0; |
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| 167 | } |
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| 168 | |
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[375] | 169 | int roar_socket_dup_udp_local_end (int fh) { |
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[376] | 170 | int n = -1; |
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| 171 | int flags = -1; |
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| 172 | struct sockaddr_in socket_addr; |
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| 173 | socklen_t len = sizeof(struct sockaddr_in); |
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| 174 | |
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| 175 | if ( (flags = fcntl(fh, F_GETFL, 0)) == -1 ) { |
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| 176 | ROAR_WARN("roar_socket_dup_udp_local_end(fh=%i): Can not read flags: %s", fh, strerror(errno)); |
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| 177 | } |
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| 178 | |
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| 179 | if ( getsockname(fh, (struct sockaddr *)&socket_addr, &len) == -1 ) { |
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| 180 | return -1; |
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| 181 | } |
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| 182 | |
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| 183 | if ( socket_addr.sin_family != AF_INET ) { |
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| 184 | return -1; |
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| 185 | } |
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| 186 | |
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| 187 | n = roar_socket_new_udp(); |
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| 188 | |
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| 189 | if ( n == -1 ) |
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| 190 | return -1; |
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| 191 | |
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| 192 | // if ( mode_func(fh, (struct sockaddr *)&socket_addr, sizeof(struct sockaddr_in)) == -1 ) { |
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| 193 | if ( bind(n, (struct sockaddr *)&socket_addr, len) == -1 ) { |
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| 194 | close(n); |
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| 195 | return -1; |
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| 196 | } |
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| 197 | |
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| 198 | if ( flags != -1 ) { |
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| 199 | if ( fcntl(fh, F_SETFL, flags) == -1 ) { |
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| 200 | ROAR_WARN("roar_socket_dup_udp_local_end(fh=%i): Can not set flags: %s", fh, strerror(errno)); |
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| 201 | return -1; |
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| 202 | } |
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| 203 | } |
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| 204 | |
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| 205 | |
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| 206 | return n; |
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[375] | 207 | } |
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| 208 | |
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[0] | 209 | int roar_socket_listen (int type, char * host, int port) { |
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| 210 | return roar_socket_open(MODE_LISTEN, type, host, port); |
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| 211 | } |
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| 212 | |
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| 213 | int roar_socket_connect (char * host, int port) { |
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[2] | 214 | char * proxy_type = getenv("ROAR_PROXY"); |
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| 215 | |
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| 216 | if ( proxy_type == NULL || strcmp(proxy_type, "") == 0 ) { |
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| 217 | return roar_socket_open(MODE_CONNECT, ROAR_SOCKET_TYPE_UNKNOWN, host, port); |
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| 218 | } else { |
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| 219 | return roar_socket_open_proxy(MODE_CONNECT, ROAR_SOCKET_TYPE_UNKNOWN, host, port, proxy_type); |
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| 220 | } |
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[0] | 221 | } |
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| 222 | |
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[508] | 223 | |
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| 224 | int roar_socket_listen_decnet (char * object, int num) { |
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| 225 | #ifdef ROAR_HAVE_LIBDNET |
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| 226 | int fh = roar_socket_new_decnet_stream(); |
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| 227 | struct sockaddr_dn bind_sockaddr; |
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| 228 | |
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| 229 | if ( fh == -1 ) |
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| 230 | return -1; |
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| 231 | |
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| 232 | if ( !*object ) |
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| 233 | object = NULL; |
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| 234 | |
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| 235 | if ( (object && num) || (!*object && !num) ) { |
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| 236 | ROAR_WARN("roar_socket_listen_decnet(object='%s', num=%i): illegal address!", object, num); |
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| 237 | close(fh); |
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| 238 | return -1; |
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| 239 | } |
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| 240 | |
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| 241 | memset((void*)&bind_sockaddr, 0, sizeof(struct sockaddr_dn)); |
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| 242 | |
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| 243 | bind_sockaddr.sdn_family = AF_DECnet; |
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| 244 | bind_sockaddr.sdn_flags = 0; |
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| 245 | bind_sockaddr.sdn_objnum = num; |
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| 246 | |
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| 247 | if ( num ) { |
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| 248 | bind_sockaddr.sdn_objnamel = 0; |
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| 249 | } else { |
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| 250 | bind_sockaddr.sdn_objnamel = ROAR_dn_htons(strlen(object)); |
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| 251 | strcpy((char*)bind_sockaddr.sdn_objname, object); // FIXME: shouldn't we use strncpy()? |
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| 252 | } |
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| 253 | |
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| 254 | if ( bind(fh, (struct sockaddr *) &bind_sockaddr, sizeof(bind_sockaddr)) == -1 ) { |
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| 255 | close(fh); |
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| 256 | return -1; |
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| 257 | } |
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| 258 | |
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| 259 | if ( listen(fh, 8) == -1 ) { |
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| 260 | close(fh); |
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| 261 | return -1; |
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| 262 | } |
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| 263 | |
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| 264 | return fh; |
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| 265 | #else |
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| 266 | return -1; |
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| 267 | #endif |
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| 268 | } |
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| 269 | |
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[521] | 270 | char * roar_socket_get_local_nodename(void) { |
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| 271 | #ifdef ROAR_HAVE_LIBDNET |
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| 272 | static char node[16] = {0}; |
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| 273 | struct dn_naddr *binaddr; |
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| 274 | struct nodeent *dp; |
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| 275 | |
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| 276 | if ( !node[0] ) { |
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| 277 | if ( (binaddr=getnodeadd()) == NULL) |
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| 278 | return NULL; |
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| 279 | |
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| 280 | if ( (dp=getnodebyaddr((char*)binaddr->a_addr, binaddr->a_len, PF_DECnet)) == NULL ) |
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| 281 | return NULL; |
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| 282 | |
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| 283 | strncpy(node, dp->n_name, 15); |
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| 284 | node[15] = 0; |
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| 285 | } |
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| 286 | |
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| 287 | return node; |
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| 288 | #else |
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| 289 | return NULL; |
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| 290 | #endif |
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| 291 | } |
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| 292 | |
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[0] | 293 | int roar_socket_open (int mode, int type, char * host, int port) { |
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| 294 | // int type = ROAR_SOCKET_TYPE_INET; |
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| 295 | int fh; |
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[531] | 296 | #ifdef ROAR_HAVE_IPX |
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| 297 | #define _NEED_OBJ |
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| 298 | int i; |
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| 299 | int ret; |
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| 300 | #endif |
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[512] | 301 | union { |
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| 302 | struct sockaddr_in in; |
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| 303 | struct sockaddr_un un; |
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[514] | 304 | struct sockaddr_in6 in6; |
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[531] | 305 | #ifdef ROAR_HAVE_IPX |
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| 306 | struct sockaddr_ipx ipx; |
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| 307 | #endif |
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[512] | 308 | } socket_addr; |
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[0] | 309 | struct hostent * he; |
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| 310 | //unsigned int host_div = 0; |
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| 311 | int (*mode_func)(int sockfd, const struct sockaddr *serv_addr, socklen_t addrlen) = connect; // default is to connect |
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[501] | 312 | #ifdef ROAR_HAVE_LIBDNET |
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[531] | 313 | #define _NEED_OBJ |
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| 314 | #endif |
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| 315 | #ifdef _NEED_OBJ |
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[501] | 316 | char obj[80]; |
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| 317 | char * del; |
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| 318 | #endif |
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[0] | 319 | |
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| 320 | if ( mode == MODE_LISTEN ) |
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| 321 | mode_func = bind; |
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| 322 | |
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| 323 | if ( type == ROAR_SOCKET_TYPE_UNKNOWN ) { |
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| 324 | type = ROAR_SOCKET_TYPE_INET; |
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[69] | 325 | if ( *host == '/' ) { |
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[0] | 326 | type = ROAR_SOCKET_TYPE_UNIX; |
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[69] | 327 | } else if ( strcmp(host, "+fork") == 0 ) { |
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| 328 | type = ROAR_SOCKET_TYPE_FORK; |
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[501] | 329 | } else if ( strstr(host, "::") != NULL ) { |
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| 330 | type = ROAR_SOCKET_TYPE_DECNET; |
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[531] | 331 | } else if ( host[strlen(host)-1] == ')' ) { |
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| 332 | type = ROAR_SOCKET_TYPE_IPX; |
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[69] | 333 | } |
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[0] | 334 | } |
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| 335 | |
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| 336 | |
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| 337 | ROAR_DBG("roar_socket_open(*): type=%s, host='%s', port=%i", |
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| 338 | type == ROAR_SOCKET_TYPE_UNIX ? "UNIX" : "INET", host, port); |
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| 339 | |
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[501] | 340 | if ( type == ROAR_SOCKET_TYPE_DECNET ) { |
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| 341 | #ifdef ROAR_HAVE_LIBDNET |
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[508] | 342 | ROAR_DBG("roar_socket_open(*): hostname for DECnet: host(%p)=%s", host, host); |
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[501] | 343 | del = strstr(host, "::"); |
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[508] | 344 | ROAR_DBG("roar_socket_open(*): hostname for DECnet: del(%p)=%s", del, del); |
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| 345 | |
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| 346 | if ( del == NULL ) { |
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| 347 | ROAR_WARN("roar_socket_open(*): invalid hostname for DECnet: %s", host); |
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| 348 | return -1; |
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| 349 | } |
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| 350 | |
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[501] | 351 | *del = 0; |
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| 352 | |
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| 353 | if ( *(del+2) == '#' ) { // assume we have node::#num |
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| 354 | port = atoi(del+2); |
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| 355 | } |
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| 356 | |
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| 357 | if ( port ) { |
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| 358 | sprintf(obj, "%i", port); // no need for snprintf() as dec(port) is smaller than obj[] |
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| 359 | } else { |
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| 360 | *obj = 0; |
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| 361 | strncat(obj, del+2, 79); |
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| 362 | } |
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| 363 | |
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[508] | 364 | if ( mode == MODE_LISTEN ) { |
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| 365 | fh = roar_socket_listen_decnet(obj, port); |
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| 366 | *del = ':'; |
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| 367 | return fh; |
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| 368 | // return -1; // listen sockets on DECnet are not supportet at the moment |
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| 369 | } else { |
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| 370 | // There is nothing wrong in this case to use dnet_conn() so we do. |
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[501] | 371 | fh = dnet_conn(host, obj, SOCK_STREAM, 0 ,0 ,0 , 0); |
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| 372 | *del = ':'; |
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| 373 | return fh; |
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[533] | 374 | } |
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[501] | 375 | #else |
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[533] | 376 | return -1; // no decnet support |
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[501] | 377 | #endif |
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| 378 | } |
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| 379 | |
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[512] | 380 | memset(&socket_addr, 0, sizeof(socket_addr)); |
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[60] | 381 | memset(&he, 0, sizeof(he)); // FIXME: we have a valid pointer in here???? |
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[0] | 382 | |
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| 383 | |
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[520] | 384 | if ( type == ROAR_SOCKET_TYPE_INET || type == ROAR_SOCKET_TYPE_INET6 ) { |
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[0] | 385 | |
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| 386 | if ( (he = gethostbyname(host)) == NULL ) { |
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| 387 | ROAR_ERR("roar_socket_open(*): Can\'t resolve host name '%s'", |
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| 388 | host); |
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| 389 | return -1; |
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| 390 | } |
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| 391 | |
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[520] | 392 | memcpy((struct in_addr *)&socket_addr.in.sin_addr, he->h_addr, sizeof(struct in_addr)); |
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[0] | 393 | |
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[520] | 394 | /* set the connect information */ |
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| 395 | socket_addr.in.sin_family = AF_INET; |
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| 396 | socket_addr.in.sin_port = ROAR_HOST2NET16(port); |
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| 397 | |
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| 398 | fh = roar_socket_new_tcp(); |
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[0] | 399 | |
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[520] | 400 | if ( mode_func(fh, (struct sockaddr *)&socket_addr.in, sizeof(struct sockaddr_in)) == -1 ) { |
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| 401 | ROAR_DBG("roar_socket_open(*): Can not connect/bind: %s", strerror(errno)); |
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| 402 | close(fh); |
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| 403 | return -1; |
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| 404 | } |
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[0] | 405 | // hey! we have a socket... |
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[69] | 406 | } else if ( type == ROAR_SOCKET_TYPE_UNIX ) { |
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[512] | 407 | socket_addr.un.sun_family = AF_UNIX; |
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| 408 | strncpy(socket_addr.un.sun_path, host, sizeof(socket_addr.un.sun_path) - 1); |
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[60] | 409 | |
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[0] | 410 | fh = roar_socket_new_unix(); |
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[60] | 411 | |
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[512] | 412 | if ( mode_func(fh, (struct sockaddr *)&socket_addr.un, sizeof(struct sockaddr_un)) == -1 ) { |
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[60] | 413 | ROAR_DBG("roar_socket_open(*): Can not connect/bind: %s", strerror(errno)); |
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| 414 | close(fh); |
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| 415 | return -1; |
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| 416 | } |
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[531] | 417 | } else if ( type == ROAR_SOCKET_TYPE_IPX ) { |
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[534] | 418 | #ifdef ROAR_HAVE_IPX |
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[531] | 419 | socket_addr.ipx.sipx_family = AF_IPX; |
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| 420 | |
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| 421 | obj[0] = 0; |
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| 422 | |
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| 423 | if ( (ret = sscanf(host, "%8x.%12s(%x)", &socket_addr.ipx.sipx_network, obj, |
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| 424 | (unsigned int *)&socket_addr.ipx.sipx_port)) < 2 ) { |
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| 425 | return -1; |
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| 426 | } else if ( ret == 2 ) { |
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| 427 | socket_addr.ipx.sipx_port = port; // Network Byte Order? |
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| 428 | } |
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| 429 | |
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| 430 | memset(socket_addr.ipx.sipx_node, 0, IPX_NODE_LEN); |
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| 431 | ret = strlen(obj); |
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| 432 | |
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| 433 | if ( ret % 2 ) // needs to be even at the moment |
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| 434 | return -1; |
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| 435 | |
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| 436 | fh = roar_socket_new_ipx(); |
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| 437 | |
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| 438 | close(fh); |
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| 439 | return -1; |
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[534] | 440 | #else |
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| 441 | return -1; |
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| 442 | #endif |
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[69] | 443 | } else if ( type == ROAR_SOCKET_TYPE_FORK ) { |
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| 444 | return roar_socket_open_fork(mode, host, port); |
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[75] | 445 | } else if ( type == ROAR_SOCKET_TYPE_FILE ) { |
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| 446 | return roar_socket_open_file(mode, host, port); |
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[69] | 447 | } else { |
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| 448 | return -1; |
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[0] | 449 | } |
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| 450 | |
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| 451 | if ( mode == MODE_LISTEN ) |
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| 452 | if ( listen(fh, ROAR_SOCKET_QUEUE_LEN) == -1 ) { |
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| 453 | close(fh); |
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| 454 | return -1; |
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| 455 | } |
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| 456 | |
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| 457 | return fh; |
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| 458 | } |
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| 459 | |
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[69] | 460 | int roar_socket_open_fork (int mode, char * host, int port) { |
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| 461 | int socks[2]; |
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| 462 | int r; |
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| 463 | char fhstr[8]; |
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| 464 | |
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| 465 | if ( mode == MODE_LISTEN ) |
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| 466 | return -1; |
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| 467 | |
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| 468 | if ( socketpair(AF_UNIX, SOCK_STREAM, 0, socks) == -1 ) { |
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| 469 | return -1; |
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| 470 | } |
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| 471 | |
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| 472 | r = fork(); |
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| 473 | |
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| 474 | if ( r == -1 ) { // error! |
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| 475 | ROAR_ERR("roar_socket_open_fork(*): Can not fork: %s", strerror(errno)); |
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| 476 | close(socks[0]); |
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| 477 | close(socks[1]); |
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| 478 | return -1; |
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| 479 | } else if ( r == 0 ) { // we are the child |
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| 480 | close(socks[0]); |
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| 481 | |
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[70] | 482 | close(ROAR_STDIN ); // we do not want roard to have any standard input |
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| 483 | close(ROAR_STDOUT); // STDOUT is also not needed, so we close it, |
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| 484 | // but STDERR we keep open for error messages. |
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| 485 | |
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[69] | 486 | snprintf(fhstr, 7, "%i", socks[1]); |
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| 487 | |
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[548] | 488 | execlp("roard", "roard", "--no-listen", "--client-fh", fhstr, NULL); |
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[69] | 489 | |
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| 490 | // we are still alive? |
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| 491 | ROAR_ERR("roar_socket_open_fork(*): alive after exec(), that's bad!"); |
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| 492 | _exit(1); |
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| 493 | } else { // we are the parent |
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| 494 | close(socks[1]); |
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| 495 | return socks[0]; |
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| 496 | } |
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| 497 | |
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| 498 | return -1; |
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| 499 | } |
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| 500 | |
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[75] | 501 | int roar_socket_open_file (int mode, char * host, int port) { |
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| 502 | int fh; |
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| 503 | |
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| 504 | if ( mode == MODE_LISTEN ) |
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| 505 | return -1; |
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| 506 | |
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| 507 | if ( (fh = open(host, O_RDONLY, 0644)) == -1 ) { |
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| 508 | ROAR_ERR("roar_socket_open_file(*): Can not open file %s: %s", host, strerror(errno)); |
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| 509 | } |
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| 510 | |
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| 511 | return fh; |
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| 512 | } |
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| 513 | |
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[2] | 514 | // --- [ PROXY CODE ] --- |
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| 515 | |
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| 516 | // generic proxy code: |
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| 517 | |
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| 518 | int roar_socket_open_proxy (int mode, int type, char * host, int port, char * proxy_type) { |
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| 519 | int proxy_port; |
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| 520 | char proxy_host[ROAR_SOCKET_MAX_HOSTNAMELEN]; |
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| 521 | char * proxy_addr; |
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| 522 | int i; |
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| 523 | int fh; |
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| 524 | |
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| 525 | // TODO: change this so we support listen() proxys (ssh -R) |
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| 526 | if ( mode != MODE_CONNECT ) |
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| 527 | return -1; |
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| 528 | |
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| 529 | if ( !strcmp(proxy_type, "socks4a") ) { // for TOR, the only supported type at the moment |
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| 530 | proxy_addr = getenv("socks_proxy"); |
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| 531 | |
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| 532 | proxy_port = 9050; // TOR's default port |
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| 533 | |
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| 534 | if ( proxy_addr == NULL ) |
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| 535 | return -1; |
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| 536 | |
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| 537 | for (i = 0; proxy_addr[i] != 0 && proxy_addr[i] != ':' && i < ROAR_SOCKET_MAX_HOSTNAMELEN; i++) |
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| 538 | proxy_host[i] = proxy_addr[i]; |
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| 539 | proxy_host[i] = 0; |
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| 540 | |
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| 541 | if ( i == 0 ) // no hostname found |
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| 542 | return -1; |
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| 543 | |
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| 544 | if ( proxy_addr[i] == ':' ) |
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| 545 | proxy_port = atoi(&proxy_addr[i+1]); |
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| 546 | |
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| 547 | if ( (fh = roar_socket_open(mode, type, proxy_host, proxy_port)) == -1) { |
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| 548 | return -1; |
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| 549 | } |
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| 550 | |
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| 551 | if ( roar_socket_open_socks4a(mode, fh, host, port) == -1 ) { |
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| 552 | close(fh); |
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| 553 | return -1; |
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| 554 | } |
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| 555 | |
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| 556 | return fh; |
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| 557 | } else { |
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| 558 | return -1; // unknown type |
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| 559 | } |
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| 560 | } |
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| 561 | |
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| 562 | // protocoll dependet proxy code: |
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| 563 | |
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| 564 | int roar_socket_open_socks4a(int mode, int fh, char * host, int port) { |
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| 565 | char buf[9]; |
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| 566 | int len; |
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| 567 | |
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| 568 | buf[0] = 0x04; |
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| 569 | buf[1] = mode == MODE_CONNECT ? 0x01 : 0x02; |
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| 570 | *((uint16_t*)&buf[2]) = htons(port); |
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| 571 | buf[4] = 0x00; |
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| 572 | buf[5] = 0x00; |
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| 573 | buf[6] = 0x00; |
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| 574 | buf[7] = 0x01; |
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| 575 | buf[8] = 0x00; |
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| 576 | |
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| 577 | if ( write(fh, buf, 9) != 9 ) |
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| 578 | return -1; |
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| 579 | |
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| 580 | len = strlen(host); |
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| 581 | |
---|
| 582 | if ( write(fh, host, len) != len ) |
---|
| 583 | return -1; |
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| 584 | |
---|
| 585 | if ( write(fh, "\0", 1) != 1 ) |
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| 586 | return -1; |
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| 587 | |
---|
| 588 | if ( read(fh, buf, 8) != 8 ) |
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| 589 | return -1; |
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| 590 | |
---|
| 591 | if ( buf[1] != 0x5a ) |
---|
| 592 | return -1; |
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| 593 | |
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| 594 | return 0; |
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| 595 | } |
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| 596 | |
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[0] | 597 | //ll |
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