[4350] | 1 | //enumdev.c: |
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| 2 | |
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| 3 | /* |
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[4708] | 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010-2011 |
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[4350] | 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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[4352] | 38 | // TODO: we should put all the data in one big alloced block. |
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| 39 | |
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[4353] | 40 | static int _test_server(struct roar_server * c, int flags) { |
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| 41 | struct roar_connection con; |
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[4435] | 42 | struct roar_server_info * info; |
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[4777] | 43 | int checked = 0; |
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[4435] | 44 | |
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[4353] | 45 | if ( c->server == NULL ) |
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| 46 | return -1; |
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| 47 | |
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| 48 | if ( flags & ROAR_ENUM_FLAG_NONBLOCK ) |
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| 49 | return 0; |
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| 50 | |
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[4777] | 51 | ROAR_DBG("_test_server(c=%p{.server='%s', ...}, flags=0x%.4X) = ?", c, c->server, flags); |
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| 52 | |
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[4353] | 53 | if ( roar_connect(&con, (char*)c->server) == -1 ) |
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| 54 | return -1; |
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| 55 | |
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[4444] | 56 | if ( (flags & ROAR_ENUM_FLAG_DESC) || (flags & ROAR_ENUM_FLAG_LOCATION) ) { |
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| 57 | info = roar_server_info(&con); |
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| 58 | if ( info != NULL ) { |
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[4777] | 59 | checked = 1; |
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[4444] | 60 | if ( info->location != NULL ) |
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| 61 | c->location = roar_mm_strdup(info->location); |
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[4435] | 62 | |
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[4444] | 63 | if ( info->description != NULL ) |
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| 64 | c->description = roar_mm_strdup(info->description); |
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[4435] | 65 | |
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[4444] | 66 | roar_server_info_free(info); |
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| 67 | } |
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[4435] | 68 | } |
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| 69 | |
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[4777] | 70 | // make sure we get at least a NOOP from the server to detect protocol mismatch. |
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| 71 | if ( !checked ) { |
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| 72 | if ( roar_noop(&con) != 0 ) { |
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| 73 | roar_disconnect(&con); |
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| 74 | return -1; |
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| 75 | } |
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| 76 | } |
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| 77 | |
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[4353] | 78 | roar_disconnect(&con); |
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| 79 | |
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| 80 | return 0; |
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| 81 | } |
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| 82 | |
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| 83 | #define _add(x) if ( (x) != NULL ) servers[ret++] = roar_mm_strdup((x)) |
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| 84 | static ssize_t _esl_defaults(int flags, int dir, int socktype, char ** servers, size_t maxlen) { |
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| 85 | #ifdef ROAR_HAVE_LIBX11 |
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| 86 | struct roar_x11_connection * x11con; |
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| 87 | #endif |
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| 88 | ssize_t ret = 0; |
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| 89 | const char * new; |
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| 90 | char buf[1024]; |
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[4780] | 91 | #if !defined(ROAR_TARGET_WIN32) && !defined(ROAR_TARGET_MICROCONTROLLER) |
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[4353] | 92 | int i; |
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[4780] | 93 | #endif |
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[4353] | 94 | |
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| 95 | if ( maxlen < 10 ) |
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| 96 | return -1; |
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| 97 | |
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| 98 | new = roar_libroar_get_server(); |
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| 99 | _add(new); |
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| 100 | |
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| 101 | new = getenv("ROAR_SERVER"); |
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| 102 | _add(new); |
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| 103 | |
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| 104 | #ifdef ROAR_HAVE_LIBX11 |
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| 105 | if ( (x11con = roar_x11_connect(NULL)) != NULL ) { |
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| 106 | new = roar_x11_get_prop(x11con, "ROAR_SERVER"); |
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| 107 | _add(new); |
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| 108 | roar_x11_disconnect(x11con); |
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| 109 | } |
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| 110 | #endif |
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| 111 | |
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| 112 | #if !defined(ROAR_TARGET_WIN32) && !defined(ROAR_TARGET_MICROCONTROLLER) |
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| 113 | if ( (i = readlink("/etc/roarserver", buf, sizeof(buf)-1)) != -1 ) { |
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| 114 | buf[i] = 0; |
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| 115 | _add(buf); |
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| 116 | } |
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| 117 | #endif |
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| 118 | |
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| 119 | if ( (new = roar_env_get_home(0)) != NULL ) { |
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| 120 | snprintf(buf, sizeof(buf)-1, "%s/%s", new, ROAR_DEFAULT_SOCK_USER); |
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| 121 | buf[sizeof(buf)-1] = 0; |
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| 122 | _add(buf); |
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| 123 | } |
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| 124 | |
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| 125 | servers[ret++] = roar_mm_strdup(ROAR_DEFAULT_SOCK_GLOBAL); |
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| 126 | servers[ret++] = roar_mm_strdup(ROAR_DEFAULT_HOST); |
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| 127 | servers[ret++] = roar_mm_strdup("::" ROAR_DEFAULT_OBJECT); |
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| 128 | servers[ret++] = roar_mm_strdup("+abstract"); |
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| 129 | servers[ret++] = roar_mm_strdup("/tmp/muroard"); |
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| 130 | |
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| 131 | return ret; |
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| 132 | } |
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| 133 | |
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[4414] | 134 | static ssize_t _esl_slp(int flags, int dir, int socktype, char ** servers, size_t maxlen) { |
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[4775] | 135 | struct roar_libroar_config * config = roar_libroar_get_config(); |
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[4414] | 136 | struct roar_slp_cookie cookie; |
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| 137 | int offset; |
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| 138 | char * url; |
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| 139 | size_t i; |
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| 140 | ssize_t ret = 0; |
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| 141 | |
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[4775] | 142 | if ( config->workaround.workarounds & ROAR_LIBROAR_CONFIG_WAS_NO_SLP ) |
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| 143 | return 0; |
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| 144 | |
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[4414] | 145 | if ( roar_slp_cookie_init(&cookie, NULL) == -1 ) |
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| 146 | return -1; |
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| 147 | |
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| 148 | if ( roar_slp_search(&cookie, ROAR_SLP_URL_TYPE) == -1 ) |
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| 149 | return -1; |
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| 150 | |
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| 151 | if ( cookie.matchcount == 0 ) |
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| 152 | return -1; |
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| 153 | |
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| 154 | ROAR_DBG("_esl_slp(*): cookie.matchcount=%i", (int)cookie.matchcount); |
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| 155 | |
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| 156 | for (i = 0; i < (size_t)cookie.matchcount && (ssize_t)maxlen > ret; i++) { |
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| 157 | url = cookie.match[i].url; |
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| 158 | ROAR_DBG("_esl_slp(*): cookie.match[%i].url='%s'", (int)i, url); |
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| 159 | |
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| 160 | offset = 0; |
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| 161 | |
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| 162 | if ( !strncmp(url, ROAR_SLP_URL_TYPE "://", ROAR_SLP_URL_TYPE_LEN + 3) ) |
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| 163 | offset = ROAR_SLP_URL_TYPE_LEN + 3; |
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| 164 | |
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| 165 | ROAR_DBG("_esl_slp(*): url=%p, offset=%i", url, offset); |
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| 166 | url = &(url[offset]); |
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| 167 | ROAR_DBG("_esl_slp(*): url='%s'", url); |
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| 168 | |
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| 169 | if ( *url == 0 ) |
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| 170 | continue; |
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| 171 | |
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| 172 | _add(url); |
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| 173 | } |
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| 174 | |
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| 175 | return ret; |
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| 176 | } |
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| 177 | |
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[4777] | 178 | static ssize_t _esl_neighbours(int flags, int dir, int socktype, char ** servers, size_t maxlen) { |
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| 179 | ssize_t ret = 0; |
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| 180 | char buf[1024]; |
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| 181 | FILE * inp; |
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| 182 | size_t i; |
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| 183 | char * delm; |
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| 184 | const struct { |
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| 185 | const char * file; |
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| 186 | const char * suffix; |
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| 187 | const size_t skip; |
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| 188 | } *f, files[] = { |
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| 189 | #ifdef ROAR_PROC_NET_DECNET_NEIGH |
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| 190 | {ROAR_PROC_NET_DECNET_NEIGH, "::", 1}, |
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| 191 | #endif |
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| 192 | #ifdef ROAR_PROC_NET_ARP |
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| 193 | {ROAR_PROC_NET_ARP, NULL, 1}, |
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| 194 | #endif |
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[4778] | 195 | // {"/etc/hosts", NULL, 0}, |
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[4777] | 196 | {NULL, NULL, 0} |
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| 197 | }; |
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| 198 | |
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| 199 | for (f = &(files[0]); f->file != NULL; f++) { |
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| 200 | if ( (inp = fopen(f->file, "r")) == NULL ) |
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| 201 | continue; |
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| 202 | |
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| 203 | for (i = 0; i < f->skip; i++) { |
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| 204 | if ( fgets(buf, sizeof(buf), inp) == NULL ) { |
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| 205 | // bad error... |
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| 206 | fclose(inp); |
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| 207 | return ret; |
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| 208 | } |
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| 209 | } |
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| 210 | |
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| 211 | while (ret < (ssize_t)maxlen && fgets(buf, sizeof(buf), inp) != NULL) { |
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| 212 | // skip comments and empty lions |
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| 213 | if ( buf[0] == '#' || buf[0] == '\0' ) |
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| 214 | continue; |
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| 215 | |
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| 216 | // ensure we have a tailing \0. |
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| 217 | buf[sizeof(buf)-1] = 0; |
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| 218 | |
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| 219 | delm = strstr(buf, " "); |
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| 220 | if ( delm == NULL ) |
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| 221 | delm = strstr(buf, "\t"); |
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| 222 | |
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| 223 | // does it look like a correctly formated lion? |
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| 224 | // we may remove this check or relax it later. |
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| 225 | if ( delm == NULL ) |
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| 226 | continue; |
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| 227 | |
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| 228 | *delm = 0; |
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| 229 | |
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| 230 | if ( f->suffix != NULL ) { |
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| 231 | if ( (strlen(buf) + strlen(f->suffix) + 1) > sizeof(buf) ) |
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| 232 | continue; |
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| 233 | |
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| 234 | strcat(buf, f->suffix); |
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| 235 | } |
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| 236 | |
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| 237 | // work around a bug in Linux kernel which always reports node 0.2 to be up. |
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| 238 | if ( !strcmp(buf, "0.2::") ) |
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| 239 | continue; |
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| 240 | |
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| 241 | _add(buf); |
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| 242 | } |
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| 243 | |
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| 244 | fclose(inp); |
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| 245 | if ( ret == (ssize_t)maxlen ) |
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| 246 | break; |
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| 247 | } |
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| 248 | |
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| 249 | return ret; |
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| 250 | } |
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| 251 | |
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[4352] | 252 | struct locmed { |
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| 253 | int supflags; |
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| 254 | ssize_t (*func)(int flags, int dir, int socktype, char ** servers, size_t maxlen); |
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| 255 | }; |
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| 256 | |
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| 257 | static struct locmed _libroar_locmod[] = { |
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[4414] | 258 | {ROAR_ENUM_FLAG_NONBLOCK|ROAR_ENUM_FLAG_HARDNONBLOCK, _esl_defaults}, |
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[4777] | 259 | {ROAR_ENUM_FLAG_NONE, _esl_slp}, |
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| 260 | {ROAR_ENUM_FLAG_NONBLOCK, _esl_neighbours} |
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[4352] | 261 | }; |
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| 262 | |
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| 263 | struct roar_server * roar_enum_servers(int flags, int dir, int socktype) { |
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| 264 | struct roar_server * ret = NULL; |
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| 265 | struct roar_server * c; |
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| 266 | char * servers[64]; |
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| 267 | size_t have = 1; |
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[4354] | 268 | size_t i, cp, unic; |
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[4352] | 269 | ssize_t r; |
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| 270 | int testflags = flags; |
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[4354] | 271 | int is_uniq; |
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[4352] | 272 | |
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[4353] | 273 | // load config: |
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| 274 | roar_libroar_get_config(); |
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| 275 | |
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[4356] | 276 | if ( flags & ROAR_ENUM_FLAG_HARDNONBLOCK ) |
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| 277 | flags |= ROAR_ENUM_FLAG_NONBLOCK; |
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| 278 | |
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[4352] | 279 | if ( testflags & ROAR_ENUM_FLAG_DESC ) |
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| 280 | testflags -= ROAR_ENUM_FLAG_DESC; |
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| 281 | if ( testflags & ROAR_ENUM_FLAG_LOCATION ) |
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| 282 | testflags -= ROAR_ENUM_FLAG_LOCATION; |
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| 283 | |
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| 284 | for (i = 0; i < sizeof(_libroar_locmod)/sizeof(*_libroar_locmod); i++) { |
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| 285 | if ( (_libroar_locmod[i].supflags & testflags) == testflags ) { |
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| 286 | r = _libroar_locmod[i].func(flags, dir, socktype, &(servers[have-1]), (sizeof(servers)/sizeof(*servers)) - have); |
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| 287 | if ( r > 0 ) |
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| 288 | have += r; |
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| 289 | } |
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| 290 | } |
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| 291 | |
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| 292 | ret = roar_mm_malloc(have*sizeof(struct roar_server)); |
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| 293 | |
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| 294 | if (ret == NULL) |
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| 295 | return NULL; |
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| 296 | |
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| 297 | have--; |
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| 298 | |
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[4353] | 299 | for (i = cp = 0; i < have; i++) { |
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| 300 | c = &(ret[cp]); |
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[4352] | 301 | c->server = servers[i]; |
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| 302 | c->description = NULL; |
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| 303 | c->location = NULL; |
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[4354] | 304 | |
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| 305 | // uniq test: |
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| 306 | is_uniq = 1; |
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| 307 | for (unic = 0; unic < cp; unic++) |
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| 308 | if ( !strcmp(ret[unic].server, servers[i]) ) |
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| 309 | is_uniq = 0; |
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| 310 | |
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| 311 | if ( is_uniq && _test_server(c, flags) == 0 ) { |
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[4353] | 312 | cp++; |
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| 313 | } else { |
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| 314 | roar_mm_free(servers[i]); |
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| 315 | } |
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[4352] | 316 | } |
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| 317 | |
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[4353] | 318 | ret[cp].server = NULL; |
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| 319 | ret[cp].description = roar_mm_strdup("Default server"); |
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| 320 | ret[cp].location = NULL; |
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[4352] | 321 | |
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| 322 | return ret; |
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| 323 | } |
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| 324 | |
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| 325 | int roar_enum_servers_free(struct roar_server * servs) { |
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| 326 | struct roar_server * c; |
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| 327 | int i; |
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| 328 | |
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| 329 | if ( servs == NULL ) |
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| 330 | return -1; |
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| 331 | |
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| 332 | for (i = 0; (c = &(servs[i]))->server != NULL; i++) { |
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| 333 | roar_mm_free((void*)c->server); |
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| 334 | if ( c->description != NULL ) |
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| 335 | roar_mm_free((void*)c->description); |
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| 336 | if ( c->location != NULL ) |
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| 337 | roar_mm_free((void*)c->location); |
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| 338 | } |
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| 339 | |
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| 340 | if ( c->description != NULL ) |
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| 341 | roar_mm_free((void*)c->description); |
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| 342 | if ( c->location != NULL ) |
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| 343 | roar_mm_free((void*)c->location); |
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| 344 | |
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| 345 | roar_mm_free(servs); |
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| 346 | |
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| 347 | return 0; |
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| 348 | } |
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| 349 | |
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| 350 | ssize_t roar_enum_servers_num(struct roar_server * servs) { |
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| 351 | size_t ret; |
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| 352 | |
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| 353 | if ( servs == NULL ) |
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| 354 | return -1; |
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| 355 | |
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| 356 | for (ret = 0; servs[ret].server != NULL; ret++); |
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| 357 | |
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| 358 | return ret; |
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| 359 | } |
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| 360 | |
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[4350] | 361 | //ll |
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