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1 /*
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2 * xmpp_helper.c -- Jabber protocol helper functions
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3 *
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4 * Copyright (C) 2008-2009 Frank Zschockelt <mcabber@freakysoft.de>
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5 * Copyright (C) 2005-2009 Mikael Berthe <mikael@lilotux.net>
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6 * Some parts initially came from the centericq project:
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7 * Copyright (C) 2002-2005 by Konstantin Klyagin <konst@konst.org.ua>
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8 *
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9 * This program is free software; you can redistribute it and/or modify
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10 * it under the terms of the GNU General Public License as published by
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11 * the Free Software Foundation; either version 2 of the License, or (at
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12 * your option) any later version.
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13 *
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14 * This program is distributed in the hope that it will be useful, but
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15 * WITHOUT ANY WARRANTY; without even the implied warranty of
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16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 * 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 program; if not, write to the Free Software
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21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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22 * USA
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23 */
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24
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25 #include "xmpp_helper.h"
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26
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27 time_t iqlast; // last message/status change time
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28
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29 const gchar* lm_message_node_get_child_value(LmMessageNode *node,
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30 const gchar *child)
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31 {
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32 LmMessageNode *tmp;
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33 tmp = lm_message_node_find_child(node, child);
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34 if (tmp)
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35 return lm_message_node_get_value(tmp);
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36 else return NULL;
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37 }
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38
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39 static LmMessageNode *hidden = NULL;
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40
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41 void lm_message_node_hide(LmMessageNode *node)
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42 {
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43 LmMessageNode *parent = node->parent, *prev_sibling = node->prev;
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44
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45 if (hidden) {
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46 hidden->children = hidden->next = hidden->prev = hidden->parent = NULL;
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47 lm_message_node_unref(hidden);
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48 }
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49
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50 if (parent->children == node)
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51 parent->children = node->next;
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52 if (prev_sibling)
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53 prev_sibling->next = node->next;
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54 if (node->next)
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55 node->next->prev = prev_sibling;
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56 }
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57
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58 //maybe not a good idea, because it uses internals of loudmouth...
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59 //it's used for rosternotes/bookmarks
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60 LmMessageNode *lm_message_node_new(const gchar *name, const gchar *xmlns)
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61 {
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62 LmMessageNode *node;
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63
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64 node = g_new0 (LmMessageNode, 1);
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65 node->name = g_strdup (name);
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66 node->value = NULL;
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67 node->raw_mode = FALSE;
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68 node->attributes = NULL;
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69 node->next = NULL;
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70 node->prev = NULL;
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71 node->parent = NULL;
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72 node->children = NULL;
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73
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74 node->ref_count = 1;
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75 lm_message_node_set_attribute(node, "xmlns", xmlns);
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76 return node;
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77 }
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78
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79 void lm_message_node_insert_childnode(LmMessageNode *node,
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80 LmMessageNode *child)
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81 {
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82 LmMessageNode *x;
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83 lm_message_node_deep_ref(child);
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84
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85 if (node->children == NULL)
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86 node->children = child;
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87 else {
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88 for (x = node->children; x->next; x = x->next)
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89 ;
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90 x->next = child;
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91 }
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92 }
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93
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94 void lm_message_node_deep_ref(LmMessageNode *node)
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95 {
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96 if (node == NULL)
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97 return;
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98 lm_message_node_ref(node);
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99 lm_message_node_deep_ref(node->next);
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100 lm_message_node_deep_ref(node->children);
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101 }
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102
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103 const gchar* lm_message_get_from(LmMessage *m)
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104 {
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105 return lm_message_node_get_attribute(m->node, "from");
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106 }
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107
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108 const gchar* lm_message_get_id(LmMessage *m)
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109 {
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110 return lm_message_node_get_attribute(m->node, "id");
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111 }
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112
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113 static LmMessage *lm_message_new_iq_from_query(LmMessage *m,
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114 LmMessageSubType type)
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115 {
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116 LmMessage *new;
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117 const char *from = lm_message_node_get_attribute(m->node, "from");
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118 const char *id = lm_message_node_get_attribute(m->node, "id");
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119
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120 new = lm_message_new_with_sub_type(from, LM_MESSAGE_TYPE_IQ,
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121 type);
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122 if (id)
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123 lm_message_node_set_attribute(new->node, "id", id);
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124
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125 return new;
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126 }
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127
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128 // entity_version(enum imstatus status)
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129 // Return a static version string for Entity Capabilities.
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130 // It should be specific to the client version, please change the id
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131 // if you alter mcabber's disco support (or add something to the version
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132 // number) so that it doesn't conflict with the official client.
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133 const char *entity_version(enum imstatus status)
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134 {
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135 static char *ver, *ver_notavail;
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136
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137 if (ver && (status != notavail))
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138 return ver;
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139 if (ver_notavail)
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140 return ver_notavail;
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141
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142 caps_add("");
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143 caps_set_identity("", "client", PACKAGE_STRING, "pc");
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144 caps_add_feature("", NS_DISCO_INFO);
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145 caps_add_feature("", NS_MUC);
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146 // advertise ChatStates only if they aren't disabled
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147 if (!settings_opt_get_int("disable_chatstates"))
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148 caps_add_feature("", NS_CHATSTATES);
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149 caps_add_feature("", NS_TIME);
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150 caps_add_feature("", NS_XMPP_TIME);
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151 caps_add_feature("", NS_VERSION);
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152 caps_add_feature("", NS_PING);
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153 caps_add_feature("", NS_COMMANDS);
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154 if (!settings_opt_get_int("iq_last_disable") &&
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155 (!settings_opt_get_int("iq_last_disable_when_notavail") ||
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156 status != notavail))
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157 caps_add_feature("", NS_LAST);
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158
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159 if (status == notavail) {
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160 ver_notavail = caps_generate();
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161 return ver_notavail;
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162 }
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163
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164 ver = caps_generate();
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165 return ver;
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166 }
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167
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168 inline static LmMessageNode *lm_message_node_find_xmlns(LmMessageNode *node,
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169 const char *xmlns)
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170 {
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171 LmMessageNode *x;
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172 const char *p;
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173
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174 for (x = node->children ; x; x = x->next) {
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175 if ((p = lm_message_node_get_attribute(x, "xmlns")) && !strcmp(p, xmlns))
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176 break;
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177 }
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178 return x;
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179 }
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180
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181 static time_t lm_message_node_get_timestamp(LmMessageNode *node)
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182 {
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183 LmMessageNode *x;
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184 const char *p;
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185
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186 x = lm_message_node_find_xmlns(node, NS_XMPP_DELAY);
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187 if (x && (!strcmp(x->name, "delay")) &&
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188 (p = lm_message_node_get_attribute(x, "stamp")) != NULL)
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189 return from_iso8601(p, 1);
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190 x = lm_message_node_find_xmlns(node, NS_DELAY);
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191 if (x && (p = lm_message_node_get_attribute(x, "stamp")) != NULL)
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192 return from_iso8601(p, 1);
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193 return 0;
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194 }
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195
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196 // lm_message_new_presence(status, recipient, message)
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197 // Create an xmlnode with default presence attributes
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198 // Note: the caller must free the node after use
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199 static LmMessage *lm_message_new_presence(enum imstatus st,
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200 const char *recipient,
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201 const char *msg)
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202 {
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203 unsigned int prio;
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204 LmMessage *x = lm_message_new(recipient, LM_MESSAGE_TYPE_PRESENCE);
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205
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206 switch(st) {
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207 case away:
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208 case notavail:
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209 case dontdisturb:
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210 case freeforchat:
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211 lm_message_node_add_child(x->node, "show", imstatus_showmap[st]);
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212 break;
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213
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214 case invisible:
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215 lm_message_node_set_attribute(x->node, "type", "invisible");
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216 break;
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217
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218 case offline:
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219 lm_message_node_set_attribute(x->node, "type", "unavailable");
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220 break;
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221
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222 default:
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223 break;
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224 }
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225
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226 if (st == away || st == notavail)
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227 prio = settings_opt_get_int("priority_away");
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228 else
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229 prio = settings_opt_get_int("priority");
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230
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231 if (prio) {
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232 char strprio[8];
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233 snprintf(strprio, 8, "%d", (int)prio);
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234 lm_message_node_add_child(x->node, "priority", strprio);
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235 }
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236
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237 if (msg)
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238 lm_message_node_add_child(x->node, "status", msg);
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239
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240 return x;
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241 }
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242
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243 static const char *defaulterrormsg(guint code)
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244 {
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245 int i = 0;
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246
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247 for (i = 0; xmpp_errors[i].code; ++i) {
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248 if (xmpp_errors[i].code == code)
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249 return xmpp_errors[i].meaning;
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250 }
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251 return NULL;
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252 }
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253
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254 // display_server_error(x)
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255 // Display the error to the user
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256 // x: error tag xmlnode pointer
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257 void display_server_error(LmMessageNode *x)
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258 {
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259 const char *desc = NULL, *p=NULL, *s;
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260 char *sdesc, *tmp;
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261 int code = 0;
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262
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263 if (!x) return;
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264
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265 /* RFC3920:
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266 * The <error/> element:
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267 * o MUST contain a child element corresponding to one of the defined
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268 * stanza error conditions specified below; this element MUST be
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269 * qualified by the 'urn:ietf:params:xml:ns:xmpp-stanzas' namespace.
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270 */
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271 if (x->children)
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272 p = x->children->name;
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273 if (p)
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274 scr_LogPrint(LPRINT_LOGNORM, "Received error packet [%s]", p);
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275
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276 // For backward compatibility
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277 if ((s = lm_message_node_get_attribute(x, "code")) != NULL) {
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278 code = atoi(s);
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279 // Default message
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280 desc = defaulterrormsg(code);
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281 }
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282
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283 // Error tag data is better, if available
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284 s = lm_message_node_get_value(x);
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285 if (s && *s) desc = s;
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286
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287 // And sometimes there is a text message
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288 s = lm_message_node_get_child_value(x, "text");
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289
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290 if (s && *s) desc = s;
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291
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292 // If we still have no description, let's give up
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293 if (!desc)
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294 return;
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295
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296 // Strip trailing newlines
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297 sdesc = g_strdup(desc);
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298 for (tmp = sdesc; *tmp; tmp++) ;
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299 if (tmp > sdesc)
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300 tmp--;
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301 while (tmp >= sdesc && (*tmp == '\n' || *tmp == '\r'))
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302 *tmp-- = '\0';
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303
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304 scr_LogPrint(LPRINT_LOGNORM, "Error code from server: %d %s", code, sdesc);
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305 g_free(sdesc);
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306 }
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307
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308 /* vim: set expandtab cindent cinoptions=>2\:2(0: For Vim users... */
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