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25
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1 /* |
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2 * This program is free software; you can redistribute it and/or modify |
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3 * it under the terms of the GNU General Public License as published by |
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4 * the Free Software Foundation; either version 2 of the License, or |
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5 * (at your option) any later version. |
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6 * |
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7 * This program is distributed in the hope that it will be useful, |
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8 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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10 * GNU General Public License for more details. |
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11 * |
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12 * You should have received a copy of the GNU General Public License |
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13 * along with this program; if not, write to the Free Software |
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14 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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15 * |
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16 * Jabber |
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17 * Copyright (C) 1998-1999 The Jabber Team http://jabber.org/ |
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18 */ |
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19 |
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20 #include "jabber.h" |
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21 #include "connwrap.h" |
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22 |
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23 /* local macros for launching event handlers */ |
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24 #define STATE_EVT(arg) if(j->on_state) { (j->on_state)(j, (arg) ); } |
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25 |
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26 /* prototypes of the local functions */ |
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27 static void startElement(void *userdata, const char *name, const char **attribs); |
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28 static void endElement(void *userdata, const char *name); |
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29 static void charData(void *userdata, const char *s, int slen); |
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30 |
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31 /* |
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32 * jab_new -- initialize a new jabber connection |
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33 * |
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34 * parameters |
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35 * user -- jabber id of the user |
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36 * pass -- password of the user |
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37 * |
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38 * results |
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39 * a pointer to the connection structure |
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40 * or NULL if allocations failed |
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41 */ |
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42 jconn jab_new(char *user, char *pass, int port, int ssl) |
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43 { |
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44 pool p; |
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45 jconn j; |
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46 |
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47 if(!user) return(NULL); |
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48 |
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49 p = pool_new(); |
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50 if(!p) return(NULL); |
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51 j = pmalloc_x(p, sizeof(jconn_struct), 0); |
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52 if(!j) return(NULL); |
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53 j->p = p; |
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54 |
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55 j->user = jid_new(p, user); |
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56 j->pass = pstrdup(p, pass); |
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57 j->port = port; |
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58 |
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59 j->state = JCONN_STATE_OFF; |
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60 j->cw_state = 0; |
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61 j->id = 1; |
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62 j->fd = -1; |
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63 j->ssl = ssl; |
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64 |
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65 return j; |
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66 } |
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67 |
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68 /* |
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69 * jab_delete -- free a jabber connection |
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70 * |
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71 * parameters |
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72 * j -- connection |
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73 * |
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74 */ |
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75 void jab_delete(jconn j) |
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76 { |
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77 if(!j) return; |
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78 |
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79 jab_stop(j); |
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80 pool_free(j->p); |
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81 } |
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82 |
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83 /* |
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84 * jab_state_handler -- set callback handler for state change |
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85 * |
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86 * parameters |
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87 * j -- connection |
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88 * h -- name of the handler function |
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89 */ |
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90 void jab_state_handler(jconn j, jconn_state_h h) |
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91 { |
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92 if(!j) return; |
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93 |
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94 j->on_state = h; |
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95 } |
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96 |
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97 /* |
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98 * jab_packet_handler -- set callback handler for incoming packets |
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99 * |
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100 * parameters |
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101 * j -- connection |
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102 * h -- name of the handler function |
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103 */ |
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104 void jab_packet_handler(jconn j, jconn_packet_h h) |
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105 { |
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106 if(!j) return; |
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107 |
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108 j->on_packet = h; |
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109 } |
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110 |
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111 void jab_logger(jconn j, jconn_logger h) |
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112 { |
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113 if(!j) return; |
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114 |
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115 j->logger = h; |
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116 } |
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117 |
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118 |
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119 /* |
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120 * jab_start -- start connection |
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121 * |
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122 * parameters |
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123 * j -- connection |
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124 * |
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125 */ |
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126 void jab_start(jconn j) |
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127 { |
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128 xmlnode x; |
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129 char *t,*t2; |
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130 |
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131 if(!j || (j->state != JCONN_STATE_OFF && j->state != JCONN_STATE_CONNECTING) ) return; |
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132 |
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133 if (!(j->cw_state & CW_CONNECT_WANT_SOMETHING)) { /* same as state != JCONN_STATE_CONNECTING */ |
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134 j->parser = XML_ParserCreate(NULL); |
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135 XML_SetUserData(j->parser, (void *)j); |
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136 XML_SetElementHandler(j->parser, startElement, endElement); |
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137 XML_SetCharacterDataHandler(j->parser, charData); |
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138 |
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139 if (j->cw_state & CW_CONNECT_BLOCKING) |
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140 j->fd = make_netsocket(j->port, j->user->server, NETSOCKET_CLIENT, j->ssl); |
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141 else |
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142 j->fd = make_nb_netsocket(j->port, j->user->server, NETSOCKET_CLIENT, j->ssl, &j->cw_state); |
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143 |
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144 if(j->fd < 0) { |
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145 STATE_EVT(JCONN_STATE_OFF); |
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146 return; |
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147 } |
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148 } |
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149 else { /* subsequent calls to cw_nb_connect until it finishes negociation */ |
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150 if (cw_nb_connect(j->fd, 0, 0, j->ssl, &j->cw_state)) { |
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151 STATE_EVT(JCONN_STATE_OFF); |
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152 return; |
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153 } |
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154 } |
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155 if (j->cw_state & CW_CONNECT_WANT_SOMETHING){ /* check if it finished negociation */ |
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156 j->state = JCONN_STATE_CONNECTING; |
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157 STATE_EVT(JCONN_STATE_CONNECTING); |
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158 return; |
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159 } |
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160 change_socket_to_blocking(j->fd); |
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161 |
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162 j->state = JCONN_STATE_CONNECTED; |
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163 STATE_EVT(JCONN_STATE_CONNECTED) |
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164 |
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165 /* start stream */ |
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166 x = jutil_header(NS_CLIENT, j->user->server); |
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167 t = xmlnode2str(x); |
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168 /* this is ugly, we can create the string here instead of jutil_header */ |
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169 /* what do you think about it? -madcat */ |
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170 t2 = strstr(t,"/>"); |
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171 *t2++ = '>'; |
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172 *t2 = '\0'; |
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173 jab_send_raw(j,"<?xml version='1.0'?>"); |
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174 jab_send_raw(j,t); |
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175 xmlnode_free(x); |
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176 |
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177 j->state = JCONN_STATE_ON; |
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178 STATE_EVT(JCONN_STATE_ON) |
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179 |
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180 } |
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181 |
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182 /* |
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183 * jab_stop -- stop connection |
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184 * |
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185 * parameters |
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186 * j -- connection |
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187 */ |
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188 void jab_stop(jconn j) |
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189 { |
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190 if(!j || j->state == JCONN_STATE_OFF) return; |
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191 |
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192 j->state = JCONN_STATE_OFF; |
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193 cw_close(j->fd); |
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194 j->fd = -1; |
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195 XML_ParserFree(j->parser); |
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196 } |
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197 |
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198 /* |
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199 * jab_getfd -- get file descriptor of connection socket |
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200 * |
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201 * parameters |
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202 * j -- connection |
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203 * |
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204 * returns |
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205 * fd of the socket or -1 if socket was not connected |
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206 */ |
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207 int jab_getfd(jconn j) |
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208 { |
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209 if(j) |
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210 return j->fd; |
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211 else |
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212 return -1; |
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213 } |
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214 |
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215 /* |
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216 * jab_getjid -- get jid structure of user |
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217 * |
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218 * parameters |
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219 * j -- connection |
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220 */ |
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221 jid jab_getjid(jconn j) |
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222 { |
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223 if(j) |
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224 return(j->user); |
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225 else |
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226 return NULL; |
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227 } |
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228 |
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229 /* jab_getsid -- get stream id |
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230 * This is the id of server's <stream:stream> tag and used for |
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231 * digest authorization. |
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232 * |
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233 * parameters |
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234 * j -- connection |
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235 */ |
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236 char *jab_getsid(jconn j) |
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237 { |
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238 if(j) |
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239 return(j->sid); |
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240 else |
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241 return NULL; |
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242 } |
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243 |
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244 /* |
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245 * jab_getid -- get a unique id |
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246 * |
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247 * parameters |
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248 * j -- connection |
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249 */ |
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250 char *jab_getid(jconn j) |
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251 { |
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252 snprintf(j->idbuf, 8, "%d", j->id++); |
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253 return &j->idbuf[0]; |
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254 } |
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255 |
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256 /* |
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257 * jab_send -- send xml data |
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258 * |
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259 * parameters |
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260 * j -- connection |
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261 * x -- xmlnode structure |
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262 */ |
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263 void jab_send(jconn j, xmlnode x) |
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264 { |
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265 if (j && j->state != JCONN_STATE_OFF) |
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266 { |
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267 char *buf = xmlnode2str(x); |
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268 if (buf) { |
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269 cw_write(j->fd, buf, strlen(buf), j->ssl); |
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270 if (j->logger) |
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271 (j->logger)(j, 0, buf); |
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272 } |
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273 |
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274 #ifdef JDEBUG |
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275 printf ("out: %s\n", buf); |
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276 #endif |
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277 } |
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278 } |
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279 |
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280 /* |
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281 * jab_send_raw -- send a string |
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282 * |
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283 * parameters |
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284 * j -- connection |
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285 * str -- xml string |
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286 */ |
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287 void jab_send_raw(jconn j, const char *str) |
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288 { |
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289 if (j && j->state != JCONN_STATE_OFF) { |
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290 cw_write(j->fd, str, strlen(str), j->ssl); |
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291 |
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292 if (j->logger) |
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293 (j->logger)(j, 0, str); |
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294 } |
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295 |
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296 #ifdef JDEBUG |
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297 printf ("out: %s\n", str); |
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298 #endif |
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299 } |
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300 |
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301 /* |
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302 * jab_recv -- read and parse incoming data |
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303 * |
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304 * parameters |
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305 * j -- connection |
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306 */ |
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307 void jab_recv(jconn j) |
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308 { |
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309 static char buf[32768]; |
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310 int len; |
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311 |
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312 if(!j || j->state == JCONN_STATE_OFF) |
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313 return; |
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314 |
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315 len = cw_read(j->fd, buf, sizeof(buf)-1, j->ssl); |
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316 if(len>0) |
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317 { |
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318 buf[len] = '\0'; |
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319 |
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320 if (j->logger) |
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321 (j->logger)(j, 1, buf); |
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322 |
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323 #ifdef JDEBUG |
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324 printf (" in: %s\n", buf); |
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325 #endif |
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326 XML_Parse(j->parser, buf, len, 0); |
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327 } |
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328 else if(len<=0) |
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329 { |
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330 STATE_EVT(JCONN_STATE_OFF); |
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331 jab_stop(j); |
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332 } |
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333 } |
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334 |
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335 /* |
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336 * jab_poll -- check socket for incoming data |
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337 * |
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338 * parameters |
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339 * j -- connection |
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340 * timeout -- poll timeout |
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341 */ |
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342 void jab_poll(jconn j, int timeout) |
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343 { |
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344 fd_set fds; |
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345 struct timeval tv; |
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346 int r; |
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347 |
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348 if (!j || j->state == JCONN_STATE_OFF) |
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349 return; |
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350 |
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351 FD_ZERO(&fds); |
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352 FD_SET(j->fd, &fds); |
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353 |
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354 if(timeout <= 0) { |
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355 r = select(j->fd + 1, &fds, NULL, NULL, NULL); |
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356 |
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357 } else { |
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358 tv.tv_sec = 0; |
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359 tv.tv_usec = timeout; |
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360 r = select(j->fd + 1, &fds, NULL, NULL, &tv); |
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361 |
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362 } |
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363 |
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364 if(r > 0) { |
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365 jab_recv(j); |
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366 |
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367 } else if(r) { |
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368 STATE_EVT(JCONN_STATE_OFF); |
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369 jab_stop(j); |
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370 |
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371 } |
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372 } |
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373 |
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374 /* |
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375 * jab_auth -- authorize user |
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376 * |
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377 * parameters |
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378 * j -- connection |
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379 * |
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380 * returns |
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381 * id of the iq packet |
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382 */ |
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383 char *jab_auth(jconn j) |
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384 { |
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385 xmlnode x,y,z; |
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386 char *hash, *user, *id; |
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387 |
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388 if(!j) return(NULL); |
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389 |
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390 x = jutil_iqnew(JPACKET__SET, NS_AUTH); |
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391 id = jab_getid(j); |
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392 xmlnode_put_attrib(x, "id", id); |
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393 y = xmlnode_get_tag(x,"query"); |
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394 |
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395 user = j->user->user; |
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396 |
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397 if (user) |
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398 { |
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399 z = xmlnode_insert_tag(y, "username"); |
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400 xmlnode_insert_cdata(z, user, -1); |
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401 } |
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402 |
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403 z = xmlnode_insert_tag(y, "resource"); |
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404 xmlnode_insert_cdata(z, j->user->resource, -1); |
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405 |
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406 if (j->sid) |
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407 { |
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408 z = xmlnode_insert_tag(y, "digest"); |
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409 hash = pmalloc(x->p, strlen(j->sid)+strlen(j->pass)+1); |
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410 strcpy(hash, j->sid); |
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411 strcat(hash, j->pass); |
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412 hash = shahash(hash); |
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413 xmlnode_insert_cdata(z, hash, 40); |
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414 } |
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415 else |
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416 { |
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417 z = xmlnode_insert_tag(y, "password"); |
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418 xmlnode_insert_cdata(z, j->pass, -1); |
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419 } |
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420 |
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421 jab_send(j, x); |
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422 xmlnode_free(x); |
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423 return id; |
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424 } |
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425 |
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426 /* |
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427 * jab_reg -- register user |
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428 * |
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429 * parameters |
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430 * j -- connection |
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431 * |
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432 * returns |
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433 * id of the iq packet |
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434 */ |
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435 char *jab_reg(jconn j) |
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436 { |
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437 xmlnode x,y,z; |
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438 char *hash, *user, *id; |
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439 |
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440 if (!j) return(NULL); |
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441 |
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442 x = jutil_iqnew(JPACKET__SET, NS_REGISTER); |
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443 id = jab_getid(j); |
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444 xmlnode_put_attrib(x, "id", id); |
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445 y = xmlnode_get_tag(x,"query"); |
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446 |
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447 user = j->user->user; |
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448 |
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449 if (user) |
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450 { |
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451 z = xmlnode_insert_tag(y, "username"); |
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452 xmlnode_insert_cdata(z, user, -1); |
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453 } |
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454 |
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455 z = xmlnode_insert_tag(y, "resource"); |
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456 xmlnode_insert_cdata(z, j->user->resource, -1); |
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457 |
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458 if (j->pass) |
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459 { |
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460 z = xmlnode_insert_tag(y, "password"); |
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461 xmlnode_insert_cdata(z, j->pass, -1); |
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462 } |
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463 |
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464 jab_send(j, x); |
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465 xmlnode_free(x); |
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466 j->state = JCONN_STATE_ON; |
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467 STATE_EVT(JCONN_STATE_ON) |
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468 return id; |
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469 } |
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470 |
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471 |
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472 /* local functions */ |
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473 |
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474 static void startElement(void *userdata, const char *name, const char **attribs) |
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475 { |
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476 xmlnode x; |
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477 jconn j = (jconn)userdata; |
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478 |
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479 if(j->current) |
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480 { |
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481 /* Append the node to the current one */ |
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482 x = xmlnode_insert_tag(j->current, name); |
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483 xmlnode_put_expat_attribs(x, attribs); |
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484 |
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485 j->current = x; |
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486 } |
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487 else |
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488 { |
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489 x = xmlnode_new_tag(name); |
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490 xmlnode_put_expat_attribs(x, attribs); |
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491 if(strcmp(name, "stream:stream") == 0) { |
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492 /* special case: name == stream:stream */ |
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493 /* id attrib of stream is stored for digest auth */ |
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494 j->sid = xmlnode_get_attrib(x, "id"); |
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495 /* STATE_EVT(JCONN_STATE_AUTH) */ |
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496 } else { |
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497 j->current = x; |
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498 } |
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499 } |
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500 } |
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501 |
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502 static void endElement(void *userdata, const char *name) |
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503 { |
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504 jconn j = (jconn)userdata; |
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505 xmlnode x; |
|
|
506 jpacket p; |
|
|
507 |
|
|
508 if(j->current == NULL) { |
|
|
509 /* we got </stream:stream> */ |
|
|
510 STATE_EVT(JCONN_STATE_OFF) |
|
|
511 return; |
|
|
512 } |
|
|
513 |
|
|
514 x = xmlnode_get_parent(j->current); |
|
|
515 |
|
|
516 if(x == NULL) |
|
|
517 { |
|
|
518 /* it is time to fire the event */ |
|
|
519 p = jpacket_new(j->current); |
|
|
520 |
|
|
521 if(j->on_packet) |
|
|
522 (j->on_packet)(j, p); |
|
|
523 else |
|
|
524 xmlnode_free(j->current); |
|
|
525 } |
|
|
526 |
|
|
527 j->current = x; |
|
|
528 } |
|
|
529 |
|
|
530 static void charData(void *userdata, const char *s, int slen) |
|
|
531 { |
|
|
532 jconn j = (jconn)userdata; |
|
|
533 |
|
|
534 if (j->current) |
|
|
535 xmlnode_insert_cdata(j->current, s, slen); |
|
|
536 } |
