src/jserver/jserver-c.c

   1 #include "jserver-c.h"
   2
   3 /* ------------------------------------------------
   4         some pre-packaged Jabber XML
   5         ------------------------------------------------ */
   6 static const char* xml_parse_error = "<stream:stream xmlns:stream='http://etherx.jabber.org/streams'"
   7         "version='1.0'><stream:error xmlns:stream='http://etherx.jabber.org/streams'>"
   8         "<xml-not-well-formed xmlns='urn:ietf:params:xml:ns:xmpp-streams'/>"
   9         "<text xmlns='urn:ietf:params:xml:ns:xmpp-streams'>syntax error</text></stream:error></stream:stream>";
  10
  11 static const char* xml_login_ok = "<iq xmlns='jabber:client' id='asdfjkl' type='result'/>";
  12
  13
  14 jserver* jserver_init() {
  15         jserver* js                                     = safe_malloc(sizeof(jserver));
  16         js->mgr                                         = safe_malloc(sizeof(socket_manager));
  17         js->mgr->data_received  = &jserver_handle_request;
  18         js->mgr->blob                           = js;
  19         js->mgr->on_socket_closed       = &jserver_socket_closed;
  20         js->client                                      = NULL;
  21
  22         return js;
  23 }
  24
  25 void jserver_free(jserver* js) {
  26         if(js == NULL) return;
  27         jclient_node* node;
  28         while(js->client) {
  29                 node = js->client->next;
  30                 _jserver_remove_client(js, js->client->addr);
  31                 js->client = node;
  32         }
  33         socket_manager_free(js->mgr);
  34         free(js);
  35 }
  36
  37 void jserver_socket_closed(void* blob, int sock_id) {
  38         jserver* js = (jserver*) blob;
  39         if(js == NULL) return;
  40         jclient_node* node = jserver_find_client_id(js, sock_id);
  41         if(node) {
  42                 info_handler("Removing client %d - %s remote "
  43                                 "site closed socket", sock_id, node->addr);
  44                 _jserver_remove_client(js, node->addr);
  45         }
  46
  47 }
  48
  49 /* opens the inet and unix sockets that we're listening on */
  50 int jserver_connect(jserver* js, int port, char* unix_path) {
  51         if(js == NULL || js->mgr == NULL) return -1;
  52         int status = 0;
  53
  54         if(port > 0) {
  55                 status = socket_open_tcp_server(js->mgr, port);
  56                 if(status == -1) return status;
  57         }
  58
  59         if(unix_path != NULL) {
  60                 status = socket_open_unix_server(js->mgr, unix_path);
  61                 if(status == -1) return status;
  62         }
  63
  64         return 0;
  65 }
  66
  67 void _free_jclient_node(jclient_node* node) {
  68         if(node == NULL) return;
  69         free(node->addr);
  70         jserver_session_free(node->session);
  71         free(node);
  72 }
  73
  74 /* allocates a new client node */
  75 jclient_node* _new_jclient_node(int id) {
  76         jclient_node* node = safe_malloc(sizeof(jclient_node));
  77         node->id = id;
  78         node->addr = NULL;
  79         node->session = jserver_session_init();
  80         node->session->blob = node;
  81         node->session->on_msg_complete = &jserver_client_handle_msg;
  82         node->session->on_from_discovered = &jserver_client_from_found;
  83         node->session->on_login_init = &jserver_client_login_init;
  84         node->session->on_login_ok = &jserver_client_login_ok;
  85         node->session->on_client_finish = &jserver_client_finish;
  86         return node;
  87 }
  88
  89 /* client has sent the end of it's session doc, we may now disconnect */
  90 void jserver_client_finish(void* blob) {
  91         jclient_node* node = (jclient_node*) blob;
  92         if(node == NULL) return;
  93         jserver_send_id(node->id, "</stream:stream>");
  94         _jserver_remove_client(node->parent, node->addr);
  95
  96 }
  97
  98 void jserver_client_from_found(void* blob, char* from) {
  99         jclient_node* node = (jclient_node*) blob;
 100         if(node == NULL || from == NULL) return;
 101
 102         /* prevent duplicate login - kick off original */
 103         _jserver_remove_client(node->parent, from);
 104         info_handler("logged in: %s", from);
 105         node->addr = strdup(from);
 106 }
 107
 108 void jserver_client_login_init(void* blob, char* reply) {
 109         debug_handler("here");
 110         jclient_node* node = (jclient_node*) blob;
 111         if(node == NULL || reply == NULL) return;
 112         debug_handler("jserver handling login init");
 113         jserver_send_id(node->id, reply);
 114 }
 115
 116 void jserver_client_login_ok(void* blob) {
 117         jclient_node* node = (jclient_node*) blob;
 118         if(node == NULL) return;
 119         info_handler("Client logging in ok => %d", node->id);
 120         jserver_send_id(node->id, xml_login_ok);
 121 }
 122
 123 void jserver_client_handle_msg(
 124         void* blob, char* xml, char* from, char* to ) {
 125
 126         jclient_node* node = (jclient_node*) blob;
 127         if(node == NULL || xml == NULL || to == NULL) return;
 128         int from_id = 0;
 129
 130         jclient_node* from_node = jserver_find_client(node->parent, from);
 131         if(from_node)
 132                 from_id = from_node->id;
 133
 134
 135         debug_handler("Client %d received from %s message : %s",
 136                         node->id, from, xml );
 137
 138         jserver_send(node->parent, from_id, to, xml);
 139 }
 140
 141 /* allocates a new client node and adds it to the set */
 142 jclient_node* _jserver_add_client(jserver* js, int id) {
 143         if(js == NULL) return NULL;
 144         jclient_node* node = _new_jclient_node(id);
 145         node->next = js->client;
 146         js->client = node;
 147         node->parent = js;
 148         return node;
 149 }
 150
 151
 152 /* removes and frees a client node */
 153 void _jserver_remove_client(jserver* js, char* addr) {
 154         if(js == NULL || js->client == NULL || addr == NULL) return;
 155
 156         jclient_node* node = js->client;
 157
 158         if(node->addr && !strcmp(node->addr,addr)) {
 159                 js->client = node->next;
 160                 socket_disconnect(js->mgr, node->id);
 161                 _free_jclient_node(node);
 162                 return;
 163         }
 164
 165         debug_handler("Searching for jclient to remove");
 166         jclient_node* tail_node = node;
 167         node = node->next;
 168
 169         while(node) {
 170                 if(node->addr && !strcmp(node->addr,addr)) {
 171                         tail_node->next = node->next;
 172                         socket_disconnect(js->mgr, node->id);
 173                         _free_jclient_node(node);
 174                         return;
 175                 }
 176                 tail_node = node;
 177                 node = node->next;
 178         }
 179 }
 180
 181 /* finds a client node by addr */
 182 jclient_node* jserver_find_client(jserver* js, char* addr) {
 183         if(js == NULL || addr == NULL) return NULL;
 184         jclient_node* node = js->client;
 185         while(node) {
 186                 if(node->addr && !strcmp(node->addr, addr))
 187                         return node;
 188                 node = node->next;
 189         }
 190         return NULL;
 191 }
 192
 193 jclient_node* jserver_find_client_id(jserver* js, int id) {
 194         if(js == NULL) return NULL;
 195         jclient_node* node = js->client;
 196         while(node) {
 197                 if(node->id == id)
 198                         return node;
 199                 node = node->next;
 200         }
 201         return NULL;
 202 }
 203
 204 /* sends msg to client at 'to_addr' */
 205 int jserver_send(jserver* js, int from_id, char* to_addr, const char* msg_xml) {
 206         debug_handler("sending message to %s : %s", to_addr, msg_xml);
 207         if(to_addr == NULL || msg_xml == NULL) return -1;
 208
 209         jclient_node* node = jserver_find_client(js, to_addr);
 210
 211         if(node == NULL) {
 212                 info_handler("message to non-existent client %s", to_addr);
 213                 if(from_id > 0) {
 214                         jclient_node* from = jserver_find_client_id(js, from_id);
 215
 216                         if(from) {
 217                                 info_handler("replying with error...");
 218                                 char buf[2048];
 219                                 memset(buf, 0, 2048);
 220                                 snprintf(buf, 2047, "<message xmlns='jabber:client' type='error' from='%s' "
 221                                         "to='%s'><error type='cancel' code='404'><item-not-found "
 222                                         "xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/></error>"
 223                                         "<body>NOT ADDING BODY</body></message>", to_addr, from->addr );
 224                                 jserver_send_id(from_id, buf);
 225                         }
 226                 }
 227                 return -1;
 228         }
 229
 230         return jserver_send_id(node->id, msg_xml);
 231 }
 232
 233 int jserver_send_id(int client_id, const char* msg_xml) {
 234         if(msg_xml == NULL || client_id < 1) return -1;
 235         return socket_send(client_id, msg_xml );
 236 }
 237
 238 /* waits for any incoming data */
 239 int jserver_wait(jserver* js) {
 240         if(js == NULL) return -1;
 241         while(1) {
 242                 if(socket_wait_all(js->mgr, -1) < 0)
 243                         warning_handler(
 244                                 "jserver_wait(): socket_wait_all() returned error");
 245
 246         }
 247 }
 248
 249
 250 int _jserver_push_client_data(jclient_node* node, char* data) {
 251         if(node == NULL || data == NULL) return -1;
 252         return jserver_session_push_data( node->session, data);
 253 }
 254
 255 void jserver_handle_request(void* js_blob,
 256         socket_manager* mgr, int sock_id, char* data, int parent_id ) {
 257
 258         jserver* js = (jserver*) js_blob;
 259
 260         debug_handler("jsever received data from socket %d (parent %d)", sock_id, parent_id );
 261
 262         jclient_node* node = jserver_find_client_id(js, sock_id);
 263         if(!node) {
 264                 debug_handler("We have a new client connection, adding to list");
 265                 node = _jserver_add_client(js, sock_id);
 266         }
 267
 268         if(_jserver_push_client_data(node, data) == -1) {
 269                 warning_handler("Client sent bad data, disconnecting...");
 270                 jserver_send_id(node->id, xml_parse_error);
 271                 _jserver_remove_client(js, node->addr);
 272
 273         } else {
 274                 debug_handler("Client data successfully parsed");
 275         }
 276
 277 }
 278
 279
 280
 281