1 #include "socket_bundle.h"
3 /* --------------------------------------------------------------------
5 -------------------------------------------------------------------- */
8 void printme(void* blob, socket_manager* mgr,
9 int sock_fd, char* data, int parent_id) {
11 fprintf(stderr, "Got data from socket %d with parent %d => %s",
12 sock_fd, parent_id, data );
14 socket_send(sock_fd, data);
17 socket_disconnect(mgr, sock_fd);
18 _socket_print_list(mgr);
22 int main(int argc, char* argv[]) {
23 socket_manager manager;
24 memset(&manager, 0, sizeof(socket_manager));
29 manager.data_received = &printme;
30 socket_open_tcp_server(&manager, port);
33 socket_wait_all(&manager, -1);
38 /* -------------------------------------------------------------------- */
42 int debug_handler(char* msg, ...) {
45 vfprintf(stderr, msg, args);
47 fprintf( stderr, "\n" );
51 int warning_handler(char* msg, ...) {
54 vfprintf(stderr, msg, args);
56 fprintf( stderr, "\n" );
62 socket_node* _socket_add_node(socket_manager* mgr,
63 int endpoint, int addr_type, int sock_fd, int parent_id ) {
65 if(mgr == NULL) return NULL;
66 debug_handler("Adding socket node with fd %d", sock_fd);
67 socket_node* new_node = safe_malloc(sizeof(socket_node));
69 new_node->endpoint = endpoint;
70 new_node->addr_type = addr_type;
71 new_node->sock_fd = sock_fd;
72 new_node->next = NULL;
73 new_node->parent_id = 0;
75 new_node->parent_id = parent_id;
77 new_node->next = mgr->socket;
78 mgr->socket = new_node;
82 /* creates a new server socket node and adds it to the socket set.
83 returns new socket fd on success. -1 on failure.
84 socket_type is one of INET or UNIX */
85 int socket_open_tcp_server(socket_manager* mgr, int port, char* listen_ip) {
87 if( mgr == NULL ) return warning_handler("socket_open_tcp_server(): NULL mgr");
90 struct sockaddr_in server_addr;
92 sock_fd = socket(AF_INET, SOCK_STREAM, 0);
95 return warning_handler("tcp_server_connect(): Unable to create socket");
97 server_addr.sin_family = AF_INET;
99 if(listen_ip != NULL) {
100 server_addr.sin_addr.s_addr = inet_addr(listen_ip);
102 server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
105 server_addr.sin_port = htons(port);
107 if(bind( sock_fd, (struct sockaddr*) &server_addr, sizeof(server_addr)) < 0)
108 return warning_handler("tcp_server_connect(): cannot bind to port %d", port );
110 if(listen(sock_fd, 20) == -1)
111 return warning_handler("tcp_server_connect(): listen() returned error");
113 _socket_add_node(mgr, SERVER_SOCKET, INET, sock_fd, 0);
117 int socket_open_unix_server(socket_manager* mgr, char* path) {
118 if(mgr == NULL || path == NULL) return -1;
120 debug_handler("opening unix socket at %s", path);
122 struct sockaddr_un server_addr;
124 sock_fd = socket(AF_UNIX, SOCK_STREAM, 0);
126 return warning_handler("socket_open_unix_server(): socket() failed");
128 server_addr.sun_family = AF_UNIX;
129 strcpy(server_addr.sun_path, path);
131 if( bind(sock_fd, (struct sockaddr*) &server_addr,
132 sizeof(struct sockaddr_un)) < 0) {
133 return warning_handler(
134 "socket_open_unix_server(): cannot bind to unix port %s", path );
137 if(listen(sock_fd, 20) == -1)
138 return warning_handler("socket_open_unix_server(): listen() returned error");
140 debug_handler("unix socket successfully opened");
144 /* causing problems with router for some reason ... */
145 //debug_handler("Setting SO_REUSEADDR");
146 //setsockopt(sock_fd, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
148 debug_handler("Setting TCP_NODELAY");
149 setsockopt(sock_fd, IPPROTO_TCP, TCP_NODELAY, &i, sizeof(i));
151 _socket_add_node(mgr, SERVER_SOCKET, UNIX, sock_fd, 0);
156 int socket_open_tcp_client(socket_manager* mgr, int port, char* dest_addr) {
158 struct sockaddr_in remoteAddr, localAddr;
159 struct hostent *hptr;
162 // ------------------------------------------------------------------
164 // ------------------------------------------------------------------
165 if( (sock_fd = socket( AF_INET, SOCK_STREAM, 0 )) < 0 ) {
166 fatal_handler( "tcp_connect(): Cannot create socket" );
171 debug_handler("Setting TCP_NODELAY");
172 setsockopt(sock_fd, IPPROTO_TCP, TCP_NODELAY, &i, sizeof(i));
175 // ------------------------------------------------------------------
177 // ------------------------------------------------------------------
178 if( (hptr = gethostbyname( dest_addr ) ) == NULL ) {
179 fatal_handler( "tcp_connect(): Unknown Host => %s", dest_addr );
183 // ------------------------------------------------------------------
184 // Construct server info struct
185 // ------------------------------------------------------------------
186 memset( &remoteAddr, 0, sizeof(remoteAddr));
187 remoteAddr.sin_family = AF_INET;
188 remoteAddr.sin_port = htons( port );
189 memcpy( (char*) &remoteAddr.sin_addr.s_addr,
190 hptr->h_addr_list[0], hptr->h_length );
192 // ------------------------------------------------------------------
193 // Construct local info struct
194 // ------------------------------------------------------------------
195 memset( &localAddr, 0, sizeof( localAddr ) );
196 localAddr.sin_family = AF_INET;
197 localAddr.sin_addr.s_addr = htonl( INADDR_ANY );
198 localAddr.sin_port = htons(0);
200 // ------------------------------------------------------------------
201 // Bind to a local port
202 // ------------------------------------------------------------------
203 if( bind( sock_fd, (struct sockaddr *) &localAddr, sizeof( localAddr ) ) < 0 ) {
204 fatal_handler( "tcp_connect(): Cannot bind to local port" );
208 // ------------------------------------------------------------------
210 // ------------------------------------------------------------------
211 if( connect( sock_fd, (struct sockaddr*) &remoteAddr, sizeof( struct sockaddr_in ) ) < 0 ) {
212 fatal_handler( "tcp_connect(): Cannot connect to server %s", dest_addr );
216 _socket_add_node(mgr, CLIENT_SOCKET, INET, sock_fd, -1 );
222 int socket_open_unix_client(socket_manager* mgr, char* sock_path) {
225 struct sockaddr_un usock;
227 if( (sock_fd = socket( AF_UNIX, SOCK_STREAM, 0 )) < 0 )
228 return warning_handler( "Cannot create socket" );
230 usock.sun_family = AF_UNIX;
231 strcpy( usock.sun_path, sock_path );
233 len = sizeof( usock.sun_family ) + strlen( usock.sun_path );
235 if( connect( sock_fd, (struct sockaddr *) &usock, len ) < 0 )
236 return warning_handler( "Error connecting to unix socket" );
238 _socket_add_node(mgr, CLIENT_SOCKET, UNIX, sock_fd, -1 );
245 /* returns the socket_node with the given sock_fd */
246 socket_node* socket_find_node(socket_manager* mgr, int sock_fd) {
247 if(mgr == NULL) return NULL;
248 socket_node* node = mgr->socket;
250 if(node->sock_fd == sock_fd)
257 /* removes the node with the given sock_fd from the list and frees it */
258 void socket_remove_node(socket_manager* mgr, int sock_fd) {
260 if(mgr == NULL) return;
262 debug_handler("removing socket %d", sock_fd);
264 socket_node* head = mgr->socket;
265 socket_node* tail = head;
266 if(head == NULL) return;
268 /* if removing the first node in the list */
269 if(head->sock_fd == sock_fd) {
270 mgr->socket = head->next;
272 debug_handler("removing first socket in list");
278 /* if removing any other node */
280 if(head->sock_fd == sock_fd) {
281 tail->next = head->next;
292 void _socket_print_list(socket_manager* mgr) {
293 if(mgr == NULL) return;
294 socket_node* node = mgr->socket;
295 debug_handler("socket_node list: [");
297 debug_handler("sock_fd: %d | parent_id: %d",
298 node->sock_fd, node->parent_id);
304 /* sends the given data to the given socket */
305 int socket_send(int sock_fd, const char* data) {
306 debug_handler( "socket_bundle sending to %d data %s",
309 info_handler("%d : Sending data at %lf\n", getpid(), get_timestamp_millis());
310 signal(SIGPIPE, SIG_IGN); /* in case a unix socket was closed */
311 if( send( sock_fd, data, strlen(data), 0 ) < 0 ) {
312 return warning_handler( "tcp_server_send(): Error sending data" );
318 /* disconnects the node with the given sock_fd and removes
319 it from the socket set */
320 void socket_disconnect(socket_manager* mgr, int sock_fd) {
322 debug_handler("Closing socket %d", sock_fd);
324 if( shutdown( sock_fd, SHUT_RDWR ) )
325 warning_handler( "socket_disconnect(): Error shuting down socket, removing anyway" );
327 if( close( sock_fd ) == -1 )
328 warning_handler( "socket_disconnect(): Error closing socket, removing anyway" );
331 socket_remove_node(mgr, sock_fd);
336 /* we assume that if select() fails, the socket is no longer valid */
337 int socket_connected(int sock_fd) {
339 FD_ZERO( &read_set );
340 FD_SET( sock_fd, &read_set );
341 if( select( sock_fd + 1, &read_set, NULL, NULL, NULL) == -1 )
347 /* this only waits on the server socket and does not handle the actual
348 data coming in from the client..... XXX */
349 int socket_wait(socket_manager* mgr, int timeout, int sock_fd) {
353 FD_ZERO( &read_set );
354 FD_SET( sock_fd, &read_set );
362 // If timeout is -1, we block indefinitely
363 if( (retval = select( sock_fd + 1, &read_set, NULL, NULL, NULL)) == -1 ) {
364 return warning_handler("Call to select interrupted");
367 } else if( timeout > 0 ) { /* timeout of 0 means don't block */
369 if( (retval = select( sock_fd + 1, &read_set, NULL, NULL, &tv)) == -1 ) {
370 return warning_handler( "Call to select interrupted" );
374 debug_handler("%d active sockets after select()", retval);
375 return _socket_route_data_id(mgr, sock_fd);
379 int socket_wait_all(socket_manager* mgr, int timeout) {
381 if(mgr == NULL) return warning_handler( "tcp_wait(): null mgr" );
385 FD_ZERO( &read_set );
387 socket_node* node = mgr->socket;
390 //debug_handler("Adding socket %d to select set",node->sock_fd);
391 FD_SET( node->sock_fd, &read_set );
392 if(node->sock_fd > max_fd) max_fd = node->sock_fd;
403 // If timeout is -1, there is no timeout passed to the call to select
404 if( (retval = select( max_fd, &read_set, NULL, NULL, NULL)) == -1 ) {
405 return warning_handler("Call to select interrupted");
408 } else if( timeout != 0 ) { /* timeout of 0 means don't block */
410 if( (retval = select( max_fd, &read_set, NULL, NULL, &tv)) == -1 ) {
411 return warning_handler( "Call to select interrupted" );
415 debug_handler("%d active sockets after select()", retval);
416 return _socket_route_data(mgr, retval, &read_set);
419 /* determines if we'er receiving a new client or data
420 on an existing client */
421 int _socket_route_data(
422 socket_manager* mgr, int num_active, fd_set* read_set) {
424 if(mgr == NULL) return -1;
426 int last_failed_id = -1;
429 /* come back here if someone yanks a socket_node from beneath us */
432 socket_node* node = mgr->socket;
436 while(node && (handled < num_active)) {
438 int sock_fd = node->sock_fd;
440 if(last_failed_id != -1) {
441 /* in case it was not removed by our overlords */
442 debug_handler("Attempting to remove last_failed_id of %d", last_failed_id);
443 socket_remove_node( mgr, last_failed_id );
449 /* does this socket have data? */
450 if( FD_ISSET( sock_fd, read_set ) ) {
452 debug_handler("Socket %d active", sock_fd);
454 FD_CLR(sock_fd, read_set);
456 if(node->endpoint == SERVER_SOCKET)
457 _socket_handle_new_client(mgr, node);
459 if(node->endpoint == CLIENT_SOCKET )
460 status = _socket_handle_client_data(mgr, node);
462 /* someone may have yanked a socket_node out from under
463 us...start over with the first socket */
465 last_failed_id = sock_fd;
466 debug_handler("Backtracking back to start of loop because "
467 "of -1 return code from _socket_handle_client_data()");
471 if(status == -1) break;
476 if(status == 0) break;
477 if(status == -1) status = 0;
484 int _socket_route_data_id( socket_manager* mgr, int sock_id) {
485 socket_node* node = socket_find_node(mgr, sock_id);
489 if(node->endpoint == SERVER_SOCKET)
490 _socket_handle_new_client(mgr, node);
492 if(node->endpoint == CLIENT_SOCKET )
493 status = _socket_handle_client_data(mgr, node);
495 if(status == -1) socket_remove_node(mgr, sock_id);
503 int _socket_handle_new_client(socket_manager* mgr, socket_node* node) {
504 if(mgr == NULL || node == NULL) return -1;
507 new_sock_fd = accept(node->sock_fd, NULL, NULL);
509 return warning_handler("_socket_route_data(): accept() failed");
511 if(node->addr_type == INET) {
512 _socket_add_node(mgr, CLIENT_SOCKET, INET, new_sock_fd, node->sock_fd);
513 debug_handler("Adding new INET client for %d", node->sock_fd);
515 } else if(node->addr_type == UNIX) {
516 _socket_add_node(mgr, CLIENT_SOCKET, UNIX, new_sock_fd, node->sock_fd);
517 debug_handler("Adding new UNIX client for %d", node->sock_fd);
524 int _socket_handle_client_data(socket_manager* mgr, socket_node* node) {
525 if(mgr == NULL || node == NULL) return -1;
529 int sock_fd = node->sock_fd;
531 memset(buf, 0, RBUFSIZE);
532 set_fl(sock_fd, O_NONBLOCK);
533 debug_handler("Gathering client data for %d", node->sock_fd);
535 info_handler("%d : Received data at %lf\n", getpid(), get_timestamp_millis());
537 while( (read_bytes = recv(sock_fd, buf, RBUFSIZE-1, 0) ) > 0 ) {
538 debug_handler("Socket %d Read %d bytes and data: %s", sock_fd, read_bytes, buf);
539 if(mgr->data_received)
540 mgr->data_received(mgr->blob, mgr, sock_fd, buf, node->parent_id);
542 memset(buf, 0, RBUFSIZE);
545 if(socket_find_node(mgr, sock_fd)) { /* someone may have closed this socket */
546 clr_fl(sock_fd, O_NONBLOCK);
548 if( errno != EAGAIN )
549 warning_handler( " * Error reading socket with errno %d", errno );
553 if(read_bytes == 0) { /* socket closed by client */
554 if(mgr->on_socket_closed) {
555 mgr->on_socket_closed(mgr->blob, sock_fd);
565 void socket_manager_free(socket_manager* mgr) {
566 if(mgr == NULL) return;
569 tmp = mgr->socket->next;
570 socket_disconnect(mgr, mgr->socket->sock_fd);