1 /* |
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2 * util.c - Source for Gabble utility functions |
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3 * Copyright (C) 2006 Collabora Ltd. |
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4 * |
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5 * @author Robert McQueen <robert.mcqueen@collabora.co.uk> |
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6 * |
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7 * This library is free software; you can redistribute it and/or |
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8 * modify it under the terms of the GNU Lesser General Public |
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9 * License as published by the Free Software Foundation; either |
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10 * version 2.1 of the License, or (at your option) any later version. |
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11 * |
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12 * This library is distributed in the hope that it will be useful, |
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 * Lesser General Public License for more details. |
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16 * |
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17 * You should have received a copy of the GNU Lesser General Public |
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18 * License along with this library; if not, write to the Free Software |
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19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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20 */ |
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21 |
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22 #include <glib.h> |
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23 #include <string.h> |
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24 #include <stdio.h> |
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25 #include "namespaces.h" |
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26 #include "gabble-connection.h" |
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27 |
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28 #include "util.h" |
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29 #include "sha1.h" |
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30 |
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31 gchar * |
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32 sha1_hex (const gchar *bytes, guint len) |
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33 { |
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34 SHA1Context sc; |
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35 uint8_t hash[SHA1_HASH_SIZE]; |
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36 gchar *hex_hash = g_malloc (SHA1_HASH_SIZE*2 + 1); |
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37 int i; |
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38 |
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39 SHA1Init (&sc); |
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40 SHA1Update (&sc, bytes, len); |
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41 SHA1Final (&sc, hash); |
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42 |
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43 for (i = 0; i < SHA1_HASH_SIZE; i++) |
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44 { |
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45 sprintf (hex_hash + 2 * i, "%02x", (unsigned int) hash[i]); |
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46 } |
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47 |
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48 return hex_hash; |
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49 } |
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50 |
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51 gboolean |
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52 g_strdiff (const gchar *left, const gchar *right) |
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53 { |
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54 if ((NULL == left) != (NULL == right)) |
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55 return TRUE; |
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56 |
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57 else if (left == right) |
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58 return FALSE; |
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59 |
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60 else |
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61 return (0 != strcmp (left, right)); |
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62 } |
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63 |
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64 static void |
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65 lm_message_node_add_nick (LmMessageNode *node, const gchar *nick) |
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66 { |
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67 LmMessageNode *nick_node; |
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68 |
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69 nick_node = lm_message_node_add_child (node, "nick", nick); |
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70 lm_message_node_set_attribute (nick_node, "xmlns", NS_NICK); |
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71 } |
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72 |
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73 void |
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74 lm_message_node_add_own_nick (LmMessageNode *node, |
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75 GabbleConnection *connection) |
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76 { |
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77 gchar *nick; |
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78 GabbleConnectionAliasSource source; |
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79 |
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80 source = _gabble_connection_get_cached_alias (connection, |
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81 connection->self_handle, &nick); |
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82 |
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83 if (source > GABBLE_CONNECTION_ALIAS_FROM_JID) |
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84 lm_message_node_add_nick (node, nick); |
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85 |
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86 g_free (nick); |
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87 } |
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88 |
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89 void |
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90 lm_message_node_steal_children (LmMessageNode *snatcher, |
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91 LmMessageNode *mum) |
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92 { |
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93 LmMessageNode *baby; |
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94 |
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95 g_return_if_fail (snatcher->children == NULL); |
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96 |
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97 if (mum->children == NULL) |
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98 return; |
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99 |
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100 snatcher->children = mum->children; |
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101 mum->children = NULL; |
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102 |
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103 for (baby = snatcher->children; |
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104 baby != NULL; |
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105 baby = baby->next) |
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106 baby->parent = snatcher; |
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107 } |
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108 |
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109 gboolean |
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110 lm_message_node_has_namespace (LmMessageNode *node, |
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111 const gchar *ns, |
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112 const gchar *tag) |
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113 { |
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114 gchar *attribute = NULL; |
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115 const gchar *node_ns; |
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116 gboolean ret; |
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117 |
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118 if (tag != NULL) |
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119 attribute = g_strconcat ("xmlns:", tag, NULL); |
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120 |
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121 node_ns = lm_message_node_get_attribute (node, |
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122 tag != NULL ? attribute : "xmlns"); |
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123 |
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124 ret = !g_strdiff (node_ns, ns); |
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125 |
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126 g_free (attribute); |
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127 |
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128 return ret; |
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129 } |
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130 |
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131 LmMessageNode * |
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132 lm_message_node_get_child_with_namespace (LmMessageNode *node, |
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133 const gchar *name, |
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134 const gchar *ns) |
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135 { |
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136 LmMessageNode *tmp; |
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137 |
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138 for (tmp = node->children; |
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139 tmp != NULL; |
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140 tmp = tmp->next) |
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141 { |
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142 gchar *tag = NULL; |
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143 gboolean found; |
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144 |
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145 if (g_strdiff (tmp->name, name)) |
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146 { |
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147 const gchar *suffix; |
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148 |
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149 suffix = strchr (tmp->name, ':'); |
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150 |
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151 if (suffix == NULL) |
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152 continue; |
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153 else |
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154 suffix++; |
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155 |
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156 if (g_strdiff (suffix, name)) |
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157 continue; |
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158 |
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159 tag = g_strndup (tmp->name, suffix - tmp->name - 1); |
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160 } |
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161 |
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162 found = lm_message_node_has_namespace (tmp, ns, tag); |
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163 |
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164 g_free (tag); |
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165 |
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166 if (found) |
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167 return tmp; |
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168 } |
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169 |
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170 return NULL; |
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171 } |
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172 |
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173 /** |
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174 * gabble_decode_jid |
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175 * |
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176 * Parses a JID which may be one of the following forms: |
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177 * server |
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178 * server/resource |
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179 * username@server |
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180 * username@server/resource |
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181 * room@service/nick |
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182 * and sets the caller's username_room, server_service and resource_nick |
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183 * pointers to the username/room, server/service and resource/nick parts |
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184 * respectively, if available in the provided JID. The caller may set any of |
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185 * the pointers to NULL if they are not interested in a certain component. |
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186 * |
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187 * The returned values may be NULL or zero-length if a component was either |
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188 * not present or zero-length respectively in the given JID. The username/room |
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189 * and server/service are lower-cased because the Jabber protocol treats them |
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190 * case-insensitively. |
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191 */ |
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192 void |
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193 gabble_decode_jid (const gchar *jid, |
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194 gchar **username_room, |
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195 gchar **server_service, |
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196 gchar **resource_nick) |
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197 { |
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198 char *tmp_jid, *tmp_username, *tmp_server, *tmp_resource; |
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199 |
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200 g_assert (jid != NULL); |
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201 g_assert (*jid != '\0'); |
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202 |
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203 if (username_room != NULL) |
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204 *username_room = NULL; |
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205 |
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206 if (server_service != NULL) |
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207 *server_service = NULL; |
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208 |
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209 if (resource_nick != NULL) |
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210 *resource_nick = NULL; |
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211 |
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212 /* take a local copy so we don't modify the caller's string */ |
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213 tmp_jid = g_strdup (jid); |
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214 |
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215 /* find an @ in username, truncate username to that length, and point |
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216 * 'server' to the byte afterwards */ |
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217 tmp_server = strchr (tmp_jid, '@'); |
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218 if (tmp_server) |
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219 { |
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220 tmp_username = tmp_jid; |
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221 |
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222 *tmp_server = '\0'; |
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223 tmp_server++; |
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224 |
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225 /* store the username if the user provided a pointer */ |
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226 if (username_room != NULL) |
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227 *username_room = g_utf8_strdown (tmp_username, -1); |
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228 } |
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229 else |
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230 { |
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231 tmp_username = NULL; |
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232 tmp_server = tmp_jid; |
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233 } |
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234 |
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235 /* if we have a server, find a / in it, truncate it to that length, and point |
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236 * 'resource' to the byte afterwards. otherwise, do the same to username to |
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237 * find any resource there. */ |
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238 tmp_resource = strchr (tmp_server, '/'); |
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239 if (tmp_resource) |
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240 { |
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241 *tmp_resource = '\0'; |
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242 tmp_resource++; |
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243 |
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244 /* store the resource if the user provided a pointer */ |
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245 if (resource_nick != NULL) |
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246 *resource_nick = g_strdup (tmp_resource); |
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247 } |
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248 |
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249 /* the server must be stored after the resource, in case we truncated a |
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250 * resource from it */ |
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251 if (server_service != NULL) |
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252 *server_service = g_utf8_strdown (tmp_server, -1); |
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253 |
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254 /* free our working copy */ |
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255 g_free (tmp_jid); |
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256 } |
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257 |
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258 /* extend a pointer by an offset, provided the offset is not 0 */ |
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259 gpointer |
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260 gabble_mixin_offset_cast (gpointer instance, |
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261 guint offset) |
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262 { |
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263 g_return_val_if_fail (offset != 0, NULL); |
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264 |
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265 return ((guchar *) instance + offset); |
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266 } |
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267 |
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