1 | /***************************************************************************\ |
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2 | * * |
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3 | * BitlBee - An IRC to IM gateway * |
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4 | * Jabber module - Handling of presence (tags), etc * |
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5 | * * |
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6 | * Copyright 2006 Wilmer van der Gaast <wilmer@gaast.net> * |
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7 | * * |
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8 | * This program is free software; you can redistribute it and/or modify * |
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9 | * it under the terms of the GNU General Public License as published by * |
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10 | * the Free Software Foundation; either version 2 of the License, or * |
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11 | * (at your option) any later version. * |
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12 | * * |
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13 | * This program is distributed in the hope that it will be useful, * |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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16 | * GNU General Public License for more details. * |
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17 | * * |
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18 | * You should have received a copy of the GNU General Public License along * |
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19 | * with this program; if not, write to the Free Software Foundation, Inc., * |
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20 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * |
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21 | * * |
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22 | \***************************************************************************/ |
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23 | |
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24 | #include "jabber.h" |
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25 | |
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26 | xt_status jabber_pkt_presence(struct xt_node *node, gpointer data) |
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27 | { |
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28 | struct im_connection *ic = data; |
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29 | char *from = xt_find_attr(node, "from"); |
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30 | char *type = xt_find_attr(node, "type"); /* NULL should mean the person is online. */ |
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31 | struct xt_node *c, *cap; |
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32 | struct jabber_buddy *bud, *send_presence = NULL; |
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33 | int is_chat = 0; |
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34 | char *s; |
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35 | |
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36 | if (!from) { |
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37 | return XT_HANDLED; |
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38 | } |
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39 | |
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40 | if ((s = strchr(from, '/'))) { |
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41 | *s = 0; |
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42 | if (jabber_chat_by_jid(ic, from)) { |
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43 | is_chat = 1; |
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44 | } |
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45 | *s = '/'; |
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46 | } |
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47 | |
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48 | if (type == NULL) { |
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49 | if (!(bud = jabber_buddy_by_jid(ic, from, GET_BUDDY_EXACT | GET_BUDDY_CREAT))) { |
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50 | /* |
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51 | imcb_log( ic, "Warning: Could not handle presence information from JID: %s", from ); |
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52 | */ |
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53 | return XT_HANDLED; |
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54 | } |
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55 | |
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56 | g_free(bud->away_message); |
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57 | if ((c = xt_find_node(node->children, "status")) && c->text_len > 0) { |
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58 | bud->away_message = g_strdup(c->text); |
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59 | } else { |
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60 | bud->away_message = NULL; |
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61 | } |
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62 | |
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63 | if ((c = xt_find_node(node->children, "show")) && c->text_len > 0) { |
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64 | bud->away_state = (void *) jabber_away_state_by_code(c->text); |
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65 | } else { |
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66 | bud->away_state = NULL; |
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67 | } |
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68 | |
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69 | if ((c = xt_find_node(node->children, "priority")) && c->text_len > 0) { |
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70 | bud->priority = atoi(c->text); |
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71 | } else { |
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72 | bud->priority = 0; |
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73 | } |
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74 | |
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75 | if (bud && (cap = xt_find_node(node->children, "c")) && |
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76 | (s = xt_find_attr(cap, "xmlns")) && strcmp(s, XMLNS_CAPS) == 0) { |
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77 | /* This <presence> stanza includes an XEP-0115 |
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78 | capabilities part. Not too interesting, but we can |
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79 | see if it has an ext= attribute. */ |
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80 | s = xt_find_attr(cap, "ext"); |
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81 | if (s && (strstr(s, "cstates") || strstr(s, "chatstate"))) { |
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82 | bud->flags |= JBFLAG_DOES_XEP85; |
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83 | } |
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84 | |
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85 | /* This field can contain more information like xhtml |
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86 | support, but we don't support that ourselves. |
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87 | Officially the ext= tag was deprecated, but enough |
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88 | clients do send it. |
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89 | |
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90 | (I'm aware that this is not the right way to use |
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91 | this field.) See for an explanation of ext=: |
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92 | http://www.xmpp.org/extensions/attic/xep-0115-1.3.html*/ |
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93 | } |
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94 | |
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95 | if (is_chat) { |
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96 | jabber_chat_pkt_presence(ic, bud, node); |
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97 | } else { |
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98 | send_presence = jabber_buddy_by_jid(ic, bud->bare_jid, 0); |
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99 | } |
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100 | } else if (strcmp(type, "unavailable") == 0) { |
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101 | if ((bud = jabber_buddy_by_jid(ic, from, 0)) == NULL) { |
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102 | /* |
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103 | imcb_log( ic, "Warning: Received presence information from unknown JID: %s", from ); |
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104 | */ |
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105 | return XT_HANDLED; |
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106 | } |
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107 | |
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108 | /* Handle this before we delete the JID. */ |
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109 | if (is_chat) { |
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110 | jabber_chat_pkt_presence(ic, bud, node); |
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111 | } |
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112 | |
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113 | if (strchr(from, '/') == NULL) { |
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114 | /* Sometimes servers send a type="unavailable" from a |
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115 | bare JID, which should mean that suddenly all |
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116 | resources for this JID disappeared. */ |
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117 | jabber_buddy_remove_bare(ic, from); |
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118 | } else { |
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119 | jabber_buddy_remove(ic, from); |
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120 | } |
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121 | |
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122 | if (is_chat) { |
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123 | /* Nothing else to do for now? */ |
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124 | } else if ((s = strchr(from, '/'))) { |
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125 | *s = 0; |
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126 | |
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127 | /* If another resource is still available, send its presence |
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128 | information. */ |
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129 | if ((send_presence = jabber_buddy_by_jid(ic, from, 0)) == NULL) { |
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130 | /* Otherwise, count him/her as offline now. */ |
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131 | imcb_buddy_status(ic, from, 0, NULL, NULL); |
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132 | } |
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133 | |
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134 | *s = '/'; |
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135 | } else { |
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136 | imcb_buddy_status(ic, from, 0, NULL, NULL); |
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137 | } |
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138 | } else if (strcmp(type, "subscribe") == 0) { |
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139 | jabber_buddy_ask(ic, from); |
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140 | } else if (strcmp(type, "subscribed") == 0) { |
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141 | /* Not sure about this one, actually... */ |
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142 | imcb_log(ic, "%s just accepted your authorization request", from); |
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143 | } else if (strcmp(type, "unsubscribe") == 0 || strcmp(type, "unsubscribed") == 0) { |
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144 | /* Do nothing here. Plenty of control freaks or over-curious |
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145 | souls get excited when they can see who still has them in |
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146 | their buddy list and who finally removed them. Somehow I |
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147 | got the impression that those are the people who get |
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148 | removed from many buddy lists for "some" reason... |
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149 | |
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150 | If you're one of those people, this is your chance to write |
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151 | your first line of code in C... */ |
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152 | } else if (strcmp(type, "error") == 0) { |
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153 | return jabber_cache_handle_packet(ic, node); |
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154 | |
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155 | /* |
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156 | struct jabber_error *err; |
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157 | if( ( c = xt_find_node( node->children, "error" ) ) ) |
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158 | { |
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159 | err = jabber_error_parse( c, XMLNS_STANZA_ERROR ); |
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160 | imcb_error( ic, "Stanza (%s) error: %s%s%s", node->name, |
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161 | err->code, err->text ? ": " : "", |
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162 | err->text ? err->text : "" ); |
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163 | jabber_error_free( err ); |
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164 | } */ |
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165 | } |
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166 | |
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167 | if (send_presence) { |
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168 | int is_away = 0; |
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169 | |
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170 | if (send_presence->away_state && |
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171 | strcmp(send_presence->away_state->code, "chat") != 0) { |
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172 | is_away = OPT_AWAY; |
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173 | } |
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174 | |
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175 | imcb_buddy_status(ic, send_presence->bare_jid, OPT_LOGGED_IN | is_away, |
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176 | is_away ? send_presence->away_state->full_name : NULL, |
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177 | send_presence->away_message); |
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178 | } |
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179 | |
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180 | return XT_HANDLED; |
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181 | } |
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182 | |
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183 | static char *choose_priority(struct im_connection *ic) |
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184 | { |
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185 | struct jabber_data *jd = ic->proto_data; |
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186 | char *prio = set_getstr(&ic->acc->set, "priority"); |
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187 | |
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188 | if (jd->away_state && jd->away_state->full_name != NULL) { |
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189 | int new_prio = (atoi(prio) - 5); |
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190 | if (new_prio < 0) { |
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191 | new_prio = 0; |
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192 | } |
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193 | return g_strdup_printf("%d", new_prio); |
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194 | } |
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195 | |
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196 | return g_strdup(prio); |
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197 | } |
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198 | |
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199 | /* Whenever presence information is updated, call this function to inform the |
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200 | server. */ |
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201 | int presence_send_update(struct im_connection *ic) |
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202 | { |
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203 | struct jabber_data *jd = ic->proto_data; |
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204 | struct xt_node *node, *cap; |
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205 | GSList *l; |
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206 | int st; |
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207 | char *prio = choose_priority(ic); |
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208 | |
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209 | node = jabber_make_packet("presence", NULL, NULL, NULL); |
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210 | xt_add_child(node, xt_new_node("priority", prio, NULL)); |
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211 | if (jd->away_state) { |
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212 | xt_add_child(node, xt_new_node("show", jd->away_state->code, NULL)); |
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213 | } |
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214 | if (jd->away_message) { |
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215 | xt_add_child(node, xt_new_node("status", jd->away_message, NULL)); |
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216 | } |
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217 | |
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218 | /* This makes the packet slightly bigger, but clients interested in |
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219 | capabilities can now cache the discovery info. This reduces the |
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220 | usual post-login iq-flood. See XEP-0115. At least libpurple and |
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221 | Trillian seem to do this right. */ |
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222 | cap = xt_new_node("c", NULL, NULL); |
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223 | xt_add_attr(cap, "xmlns", XMLNS_CAPS); |
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224 | xt_add_attr(cap, "node", "http://bitlbee.org/xmpp/caps"); |
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225 | xt_add_attr(cap, "ver", BITLBEE_VERSION); /* The XEP wants this hashed, but nobody's doing that. */ |
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226 | xt_add_child(node, cap); |
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227 | |
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228 | st = jabber_write_packet(ic, node); |
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229 | |
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230 | /* Have to send this update to all groupchats too, the server won't |
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231 | do this automatically. */ |
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232 | for (l = ic->groupchats; l && st; l = l->next) { |
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233 | struct groupchat *c = l->data; |
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234 | struct jabber_chat *jc = c->data; |
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235 | |
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236 | xt_add_attr(node, "to", jc->my_full_jid); |
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237 | st = jabber_write_packet(ic, node); |
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238 | } |
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239 | |
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240 | xt_free_node(node); |
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241 | g_free(prio); |
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242 | return st; |
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243 | } |
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244 | |
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245 | /* Send a subscribe/unsubscribe request to a buddy. */ |
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246 | int presence_send_request(struct im_connection *ic, char *handle, char *request) |
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247 | { |
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248 | struct xt_node *node; |
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249 | int st; |
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250 | |
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251 | node = jabber_make_packet("presence", NULL, NULL, NULL); |
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252 | xt_add_attr(node, "to", handle); |
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253 | xt_add_attr(node, "type", request); |
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254 | |
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255 | st = jabber_write_packet(ic, node); |
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256 | |
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257 | xt_free_node(node); |
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258 | return st; |
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259 | } |
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