[5367] | 1 | //vio_proxy.c: |
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| 2 | |
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| 3 | /* |
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[5381] | 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2011-2012 |
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[5367] | 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, 51 Franklin Street, Fifth Floor, |
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| 22 | * Boston, MA 02110-1301, USA. |
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| 23 | * |
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| 24 | * NOTE for everyone want's to change something and send patches: |
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| 25 | * read README and HACKING! There a addition information on |
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| 26 | * the license of this document you need to read before you send |
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| 27 | * any patches. |
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| 28 | * |
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| 29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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| 30 | * or libpulse*: |
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| 31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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| 32 | * and are therefore GPL. Because of this it may be illigal to use |
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| 33 | * them with any software that uses libesd, libartsc or libpulse*. |
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| 34 | */ |
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| 35 | |
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| 36 | #include "libroar.h" |
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| 37 | |
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| 38 | int roar_vio_proxy_init_def(struct roar_vio_defaults * def, |
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| 39 | char * dstr, enum roar_vio_proxy_type type, |
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| 40 | struct roar_vio_defaults * odef) { |
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| 41 | int hint = -1; |
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| 42 | |
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| 43 | (void)type; // TODO: generate hints from type. |
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| 44 | |
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| 45 | ROAR_DBG("roar_vio_proxy_init_def(def=%p, dstr='%s', type=%i, odef=%p) = ?", def, dstr, (int)type, odef); |
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| 46 | |
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| 47 | if ( roar_vio_dstr_init_defaults(def, ROAR_VIO_DEF_TYPE_SOCKET, O_RDWR, 0644) == -1 ) |
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| 48 | return -1; |
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| 49 | |
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| 50 | if ( roar_vio_socket_init_dstr_def(def, dstr, hint, odef == NULL ? SOCK_STREAM : odef->d.socket.type, odef) == -1 ) { |
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| 51 | ROAR_DBG("roar_vio_proxy_init_def(def=%p, dstr='%s', type=%i, odef=%p) = -1", def, dstr, (int)type, odef); |
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| 52 | return -1; |
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| 53 | } |
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| 54 | |
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| 55 | ROAR_DBG("roar_vio_proxy_init_def(def=%p, dstr='%s', type=%i, odef=%p) = 0", def, dstr, (int)type, odef); |
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| 56 | return 0; |
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| 57 | } |
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| 58 | |
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| 59 | static int roar_vio_proxy_ctl (struct roar_vio_calls * vio, roar_vio_ctl_t cmd, void * data) { |
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| 60 | if ( cmd == ROAR_VIO_CTL_GET_NAME ) { |
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| 61 | *(char **)data = "proxy"; |
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| 62 | return 0; |
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| 63 | } |
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| 64 | |
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| 65 | return roar_vio_pass_ctl(vio, cmd, data); |
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| 66 | } |
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| 67 | |
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| 68 | static int init_socks4(struct roar_vio_calls * dst, enum roar_vio_proxy_type type, struct roar_vio_defaults * odef) { |
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| 69 | char buf[9] = { |
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| 70 | 0x04, // [0] Version |
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| 71 | 0x01, // [1] mode=connect (listen is 0x02) |
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| 72 | 0, 0, 0, 0, // [2..5] host IP |
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| 73 | 0, // [6] Port MSB |
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| 74 | 0, // [7] Port LSB |
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| 75 | 0x00 // [8] EOS (\0) of username |
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| 76 | }; |
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| 77 | enum roar_vio_proxy_type needed_type = ROAR_VIO_PROXY_INVALID; |
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| 78 | |
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| 79 | ROAR_DBG("init_socks4(dst=%p, type=%i, odef=%p{.d.socket={.domain=%i, .type=%i, .host='%s'}}) = ?", dst, (int)type, odef, odef->d.socket.domain, odef->d.socket.type, odef->d.socket.host); |
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| 80 | |
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| 81 | switch (odef->d.socket.domain) { |
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| 82 | #ifdef ROAR_HAVE_IPV4 |
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| 83 | case AF_INET: needed_type = ROAR_VIO_PROXY_SOCKS4; break; |
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| 84 | #endif |
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| 85 | #ifdef ROAR_HAVE_LIBDNET |
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| 86 | case AF_DECnet: |
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| 87 | if ( odef->d.socket.sa.dn.sdn_objnum == 0 ) { |
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| 88 | needed_type = ROAR_VIO_PROXY_SOCKS4d; |
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| 89 | } else { |
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| 90 | needed_type = ROAR_VIO_PROXY_SOCKS4; |
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| 91 | } |
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| 92 | break; |
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| 93 | #endif |
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| 94 | #ifdef ROAR_HAVE_IPV6 |
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| 95 | case AF_INET6: |
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| 96 | #endif |
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| 97 | #ifdef ROAR_HAVE_IPX |
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| 98 | case AF_IPX: |
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| 99 | #endif |
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| 100 | #ifdef ROAR_HAVE_UNIX |
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| 101 | case AF_UNIX: |
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| 102 | #endif |
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| 103 | default: |
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| 104 | roar_err_set(ROAR_ERROR_AFNOTSUP); |
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| 105 | return -1; |
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| 106 | break; |
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| 107 | } |
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| 108 | |
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| 109 | if ( needed_type == ROAR_VIO_PROXY_SOCKS4 && type != needed_type ) |
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| 110 | needed_type = type; |
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| 111 | |
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| 112 | if ( needed_type != type ) { |
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| 113 | roar_err_set(ROAR_ERROR_INVAL); |
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| 114 | return -1; |
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| 115 | } |
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| 116 | |
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| 117 | switch (odef->d.socket.domain) { |
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| 118 | #ifdef ROAR_HAVE_IPV4 |
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| 119 | case AF_INET: |
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| 120 | if ( roar_vio_socket_init_inet4host_def(odef) == -1 ) |
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| 121 | return -1; |
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| 122 | buf[2] = ((char*)&(odef->d.socket.sa.in.sin_port))[0]; |
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| 123 | buf[3] = ((char*)&(odef->d.socket.sa.in.sin_port))[1]; |
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| 124 | buf[4] = ((char*)&(odef->d.socket.sa.in.sin_addr.s_addr))[0]; |
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| 125 | buf[5] = ((char*)&(odef->d.socket.sa.in.sin_addr.s_addr))[1]; |
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| 126 | buf[6] = ((char*)&(odef->d.socket.sa.in.sin_addr.s_addr))[2]; |
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| 127 | buf[7] = ((char*)&(odef->d.socket.sa.in.sin_addr.s_addr))[3]; |
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| 128 | ROAR_DBG("init_socks4(dst=%p, type=%i, odef=%p{.d.socket={.domain=%i, .type=%i, .host='%s'}}): buf[]={%i, %i, %i, %i, %i, %i, %i, %i, %i}", |
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| 129 | dst, (int)type, odef, odef->d.socket.domain, odef->d.socket.type, odef->d.socket.host, |
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| 130 | buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7], buf[8]); |
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| 131 | break; |
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| 132 | #endif |
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| 133 | #ifdef ROAR_HAVE_LIBDNET |
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| 134 | case AF_DECnet: |
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| 135 | if ( type == ROAR_VIO_PROXY_SOCKS4 ) { |
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| 136 | buf[2] = 0; |
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| 137 | buf[3] = odef->d.socket.sa.dn.sdn_objnum; |
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| 138 | buf[4] = 0; |
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| 139 | buf[5] = 2; |
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| 140 | buf[6] = odef->d.socket.sa.dn.sdn_nodeaddr[0]; |
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| 141 | buf[7] = odef->d.socket.sa.dn.sdn_nodeaddr[1]; |
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| 142 | } else { |
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| 143 | roar_err_set(ROAR_ERROR_NOTSUP); |
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| 144 | return -1; |
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| 145 | } |
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| 146 | break; |
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| 147 | #endif |
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| 148 | } |
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| 149 | |
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| 150 | if ( roar_vio_write(dst, buf, sizeof(buf)) != (ssize_t)sizeof(buf) ) |
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| 151 | return -1; |
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| 152 | |
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| 153 | if ( roar_vio_read(dst, buf, 8) != (ssize_t)8 ) |
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| 154 | return -1; |
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| 155 | |
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| 156 | if ( buf[1] != 0x5a ) { |
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| 157 | roar_err_set(ROAR_ERROR_UNKNOWN); |
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| 158 | return -1; |
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| 159 | } |
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| 160 | |
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| 161 | return 0; |
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| 162 | } |
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| 163 | |
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| 164 | int roar_vio_open_proxy (struct roar_vio_calls * calls, struct roar_vio_calls * dst, |
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| 165 | enum roar_vio_proxy_type type, struct roar_vio_defaults * odef) { |
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| 166 | int init_only = -1; |
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| 167 | int (*init)(struct roar_vio_calls * dst, enum roar_vio_proxy_type type, struct roar_vio_defaults * odef) = NULL; |
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| 168 | |
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| 169 | ROAR_DBG("roar_vio_open_proxy(calls=%p, dst=%p, type=%i, odef=%p{.type=%i}) = ?", calls, dst, (int)type, odef, (int)odef->type); |
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| 170 | |
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| 171 | if ( odef->type != ROAR_VIO_DEF_TYPE_SOCKET ) { |
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| 172 | roar_err_set(ROAR_ERROR_NOTSOCK); |
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| 173 | return -1; |
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| 174 | } |
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| 175 | |
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| 176 | switch (type) { |
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| 177 | case ROAR_VIO_PROXY_NONE: init_only = 1; init = NULL; break; |
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| 178 | case ROAR_VIO_PROXY_SOCKS: |
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| 179 | case ROAR_VIO_PROXY_SOCKS4: |
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| 180 | case ROAR_VIO_PROXY_SOCKS4a: |
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| 181 | case ROAR_VIO_PROXY_SOCKS4d: |
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| 182 | init_only = 1; |
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| 183 | init = init_socks4; |
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| 184 | break; |
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[5419] | 185 | #ifndef DEBUG |
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| 186 | default: |
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| 187 | break; |
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| 188 | #endif |
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[5367] | 189 | } |
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| 190 | |
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| 191 | if ( init_only == 1 ) { |
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| 192 | if ( init != NULL ) |
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| 193 | if ( init(dst, type, odef) == -1 ) |
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| 194 | return -1; |
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| 195 | if ( roar_vio_open_pass(calls, dst) == -1 ) |
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| 196 | return -1; |
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| 197 | |
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| 198 | calls->ctl = roar_vio_proxy_ctl; |
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| 199 | |
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| 200 | return 0; |
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| 201 | } else { |
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| 202 | roar_err_set(ROAR_ERROR_NOTSUP); |
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| 203 | return -1; |
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| 204 | } |
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| 205 | } |
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| 206 | |
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| 207 | // DSTR interface: |
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| 208 | static enum roar_vio_proxy_type _dstrtype2proxytype(struct roar_vio_dstr_chain * chainelement) { |
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| 209 | switch (chainelement->type) { |
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| 210 | case ROAR_VIO_DSTR_OBJT_SOCKS: return ROAR_VIO_PROXY_SOCKS; break; |
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| 211 | case ROAR_VIO_DSTR_OBJT_SOCKS4: return ROAR_VIO_PROXY_SOCKS4; break; |
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| 212 | case ROAR_VIO_DSTR_OBJT_SOCKS4A: return ROAR_VIO_PROXY_SOCKS4a; break; |
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| 213 | case ROAR_VIO_DSTR_OBJT_SOCKS4D: return ROAR_VIO_PROXY_SOCKS4d; break; |
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| 214 | case ROAR_VIO_DSTR_OBJT_SOCKS5: return ROAR_VIO_PROXY_SOCKS5; break; |
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| 215 | default: |
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| 216 | return ROAR_VIO_PROXY_INVALID; |
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| 217 | break; |
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| 218 | } |
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| 219 | } |
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| 220 | |
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| 221 | int roar_vio_proxy_setdef(struct roar_vio_dstr_chain * cur, struct roar_vio_dstr_chain * next) { |
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| 222 | next->def = &(next->store_def); |
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| 223 | return roar_vio_proxy_init_def(next->def, cur->dst, _dstrtype2proxytype(cur), cur->def); |
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| 224 | } |
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| 225 | |
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| 226 | int roar_vio_proxy_openvio(struct roar_vio_calls * calls, struct roar_vio_calls * dst, struct roar_vio_dstr_chain * cur, struct roar_vio_dstr_chain * next) { |
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| 227 | return roar_vio_open_proxy(calls, dst, _dstrtype2proxytype(cur), cur->def); |
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| 228 | } |
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| 229 | |
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| 230 | //ll |
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