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");
141 _socket_add_node(mgr, SERVER_SOCKET, UNIX, sock_fd, 0);
146 int socket_open_tcp_client(socket_manager* mgr, int port, char* dest_addr) {
148 struct sockaddr_in remoteAddr, localAddr;
149 struct hostent *hptr;
152 // ------------------------------------------------------------------
154 // ------------------------------------------------------------------
155 if( (sock_fd = socket( AF_INET, SOCK_STREAM, 0 )) < 0 ) {
156 fatal_handler( "tcp_connect(): Cannot create socket" );
160 // ------------------------------------------------------------------
162 // ------------------------------------------------------------------
163 if( (hptr = gethostbyname( dest_addr ) ) == NULL ) {
164 fatal_handler( "tcp_connect(): Unknown Host => %s", dest_addr );
168 // ------------------------------------------------------------------
169 // Construct server info struct
170 // ------------------------------------------------------------------
171 memset( &remoteAddr, 0, sizeof(remoteAddr));
172 remoteAddr.sin_family = AF_INET;
173 remoteAddr.sin_port = htons( port );
174 memcpy( (char*) &remoteAddr.sin_addr.s_addr,
175 hptr->h_addr_list[0], hptr->h_length );
177 // ------------------------------------------------------------------
178 // Construct local info struct
179 // ------------------------------------------------------------------
180 memset( &localAddr, 0, sizeof( localAddr ) );
181 localAddr.sin_family = AF_INET;
182 localAddr.sin_addr.s_addr = htonl( INADDR_ANY );
183 localAddr.sin_port = htons(0);
185 // ------------------------------------------------------------------
186 // Bind to a local port
187 // ------------------------------------------------------------------
188 if( bind( sock_fd, (struct sockaddr *) &localAddr, sizeof( localAddr ) ) < 0 ) {
189 fatal_handler( "tcp_connect(): Cannot bind to local port" );
193 // ------------------------------------------------------------------
195 // ------------------------------------------------------------------
196 if( connect( sock_fd, (struct sockaddr*) &remoteAddr, sizeof( struct sockaddr_in ) ) < 0 ) {
197 fatal_handler( "tcp_connect(): Cannot connect to server %s", dest_addr );
201 _socket_add_node(mgr, CLIENT_SOCKET, INET, sock_fd, -1 );
207 int socket_open_unix_client(socket_manager* mgr, char* sock_path) {
210 struct sockaddr_un usock;
212 if( (sock_fd = socket( AF_UNIX, SOCK_STREAM, 0 )) < 0 )
213 return warning_handler( "Cannot create socket" );
215 usock.sun_family = AF_UNIX;
216 strcpy( usock.sun_path, sock_path );
218 len = sizeof( usock.sun_family ) + strlen( usock.sun_path );
220 if( connect( sock_fd, (struct sockaddr *) &usock, len ) < 0 )
221 return warning_handler( "Error connecting to unix socket" );
223 _socket_add_node(mgr, CLIENT_SOCKET, UNIX, sock_fd, -1 );
230 /* returns the socket_node with the given sock_fd */
231 socket_node* socket_find_node(socket_manager* mgr, int sock_fd) {
232 if(mgr == NULL) return NULL;
233 socket_node* node = mgr->socket;
235 if(node->sock_fd == sock_fd)
242 /* removes the node with the given sock_fd from the list and frees it */
243 void socket_remove_node(socket_manager* mgr, int sock_fd) {
245 if(mgr == NULL) return;
247 debug_handler("removing socket %d", sock_fd);
249 socket_node* head = mgr->socket;
250 socket_node* tail = head;
251 if(head == NULL) return;
253 /* if removing the first node in the list */
254 if(head->sock_fd == sock_fd) {
255 mgr->socket = head->next;
257 debug_handler("removing first socket in list");
263 /* if removing any other node */
265 if(head->sock_fd == sock_fd) {
266 tail->next = head->next;
277 void _socket_print_list(socket_manager* mgr) {
278 if(mgr == NULL) return;
279 socket_node* node = mgr->socket;
280 debug_handler("socket_node list: [");
282 debug_handler("sock_fd: %d | parent_id: %d",
283 node->sock_fd, node->parent_id);
289 /* sends the given data to the given socket */
290 int socket_send(int sock_fd, const char* data) {
291 debug_handler( "socket_bundle sending to %d data %s",
294 info_handler("%d : Sending data at %lf\n", getpid(), get_timestamp_millis());
295 signal(SIGPIPE, SIG_IGN); /* in case a unix socket was closed */
296 if( send( sock_fd, data, strlen(data), 0 ) < 0 ) {
297 return warning_handler( "tcp_server_send(): Error sending data" );
303 /* disconnects the node with the given sock_fd and removes
304 it from the socket set */
305 void socket_disconnect(socket_manager* mgr, int sock_fd) {
307 debug_handler("Closing socket %d", sock_fd);
309 if( shutdown( sock_fd, SHUT_RDWR ) )
310 warning_handler( "socket_disconnect(): Error shuting down socket, removing anyway" );
312 if( close( sock_fd ) == -1 )
313 warning_handler( "socket_disconnect(): Error closing socket, removing anyway" );
316 socket_remove_node(mgr, sock_fd);
321 /* we assume that if select() fails, the socket is no longer valid */
322 int socket_connected(int sock_fd) {
324 FD_ZERO( &read_set );
325 FD_SET( sock_fd, &read_set );
326 if( select( sock_fd + 1, &read_set, NULL, NULL, NULL) == -1 )
332 int socket_wait(socket_manager* mgr, int timeout, int sock_fd) {
337 int socket_wait_all(socket_manager* mgr, int timeout) {
339 if(mgr == NULL) return warning_handler( "tcp_wait(): null mgr" );
343 FD_ZERO( &read_set );
345 socket_node* node = mgr->socket;
348 //debug_handler("Adding socket %d to select set",node->sock_fd);
349 FD_SET( node->sock_fd, &read_set );
350 if(node->sock_fd > max_fd) max_fd = node->sock_fd;
359 if( timeout == -1 ) {
361 // If timeout is -1, there is no timeout passed to the call to select
362 if( (retval = select( max_fd, &read_set, NULL, NULL, NULL)) == -1 ) {
363 return warning_handler("Call to select interrupted");
366 } else if( timeout != 0 ) { /* timeout of 0 means don't block */
368 if( (retval = select( max_fd, &read_set, NULL, NULL, &tv)) == -1 ) {
369 return warning_handler( "Call to select interrupted" );
373 debug_handler("%d active sockets after select()", retval);
374 return _socket_route_data(mgr, retval, &read_set);
377 /* determines if we'er receiving a new client or data
378 on an existing client */
379 int _socket_route_data(
380 socket_manager* mgr, int num_active, fd_set* read_set) {
382 if(mgr == NULL) return -1;
384 int last_failed_id = -1;
387 /* come back here if someone yanks a socket_node from beneath us */
390 socket_node* node = mgr->socket;
394 while(node && (handled < num_active)) {
396 int sock_fd = node->sock_fd;
398 if(last_failed_id != -1) {
399 /* in case it was not removed by our overlords */
400 debug_handler("Attempting to remove last_failed_id of %d", last_failed_id);
401 socket_remove_node( mgr, last_failed_id );
408 /* does this socket have data? */
409 if( FD_ISSET( sock_fd, read_set ) ) {
412 debug_handler("Socket %d active", sock_fd);
414 FD_CLR(sock_fd, read_set);
416 if(node->endpoint == SERVER_SOCKET)
417 _socket_handle_new_client(mgr, node);
419 if(node->endpoint == CLIENT_SOCKET )
420 status = _socket_handle_client_data(mgr, node);
422 /* someone may have yanked a socket_node out from under
423 us...start over with the first socket */
425 last_failed_id = sock_fd;
426 debug_handler("Backtracking back to start of loop because "
427 "of -1 return code from _socket_handle_client_data()");
431 if(status == -1) break;
436 if(status == 0) break;
437 if(status == -1) status = 0;
444 int _socket_handle_new_client(socket_manager* mgr, socket_node* node) {
445 if(mgr == NULL || node == NULL) return -1;
447 //struct sockaddr_in client_addr_in;
448 //struct sockaddr_un client_addr_un;
449 //int client_len, new_sock_fd;
452 new_sock_fd = accept(node->sock_fd, NULL, NULL);
454 return warning_handler("_socket_route_data(): accept() failed");
456 if(node->addr_type == INET) {
457 _socket_add_node(mgr, CLIENT_SOCKET, INET, new_sock_fd, node->sock_fd);
458 debug_handler("Adding new INET client for %d", node->sock_fd);
460 } else if(node->addr_type == UNIX) {
461 _socket_add_node(mgr, CLIENT_SOCKET, UNIX, new_sock_fd, node->sock_fd);
462 debug_handler("Adding new UNIX client for %d", node->sock_fd);
469 int _socket_handle_client_data(socket_manager* mgr, socket_node* node) {
470 if(mgr == NULL || node == NULL) return -1;
474 int sock_fd = node->sock_fd;
476 memset(buf, 0, BUFSIZE);
477 set_fl(sock_fd, O_NONBLOCK);
478 debug_handler("Gathering client data for %d", node->sock_fd);
480 info_handler("%d : Received data at %lf\n", getpid(), get_timestamp_millis());
482 while( (read_bytes = recv(sock_fd, buf, BUFSIZE-1, 0) ) > 0 ) {
483 debug_handler("Socket %d Read %d bytes and data: %s", sock_fd, read_bytes, buf);
484 if(mgr->data_received)
485 mgr->data_received(mgr->blob, mgr, sock_fd, buf, node->parent_id);
487 memset(buf, 0, BUFSIZE);
490 if(socket_find_node(mgr, sock_fd)) { /* someone may have closed this socket */
491 clr_fl(sock_fd, O_NONBLOCK);
493 if( errno != EAGAIN )
494 warning_handler( " * Error reading socket with errno %d", errno );
498 if(read_bytes == 0) { /* socket closed by client */
499 if(mgr->on_socket_closed) {
500 mgr->on_socket_closed(mgr->blob, sock_fd);
510 void socket_manager_free(socket_manager* mgr) {
511 if(mgr == NULL) return;
514 tmp = mgr->socket->next;
515 socket_disconnect(mgr, mgr->socket->sock_fd);