3 /* transport - low level communication */
5 /* Authors: Martin Quinson */
6 /* Copyright (C) 2004 Martin Quinson. */
8 /* This program is free software; you can redistribute it and/or modify it
9 under the terms of the license (GNU LGPL) which comes with this package. */
11 #include <time.h> /* time() */
13 #include "gras/Transport/transport_private.h"
15 GRAS_LOG_NEW_DEFAULT_SUBCATEGORY(transport,GRAS);
17 static gras_dict_t *_gras_trp_plugins; /* All registered plugins */
18 static void gras_trp_plugin_free(void *p); /* free one of the plugins */
20 static void gras_trp_socket_free(void *s); /* free one socket */
23 gras_trp_plugin_new(const char *name, gras_trp_setup_t setup);
26 gras_trp_plugin_new(const char *name, gras_trp_setup_t setup) {
29 gras_trp_plugin_t *plug = malloc(sizeof(gras_trp_plugin_t));
31 DEBUG1("Create plugin %s",name);
36 memset(plug,0,sizeof(gras_trp_plugin_t));
38 plug->name=strdup(name);
42 errcode = setup(plug);
45 /* SG plugin return mismatch when in RL mode (and vice versa) */
51 TRY(gras_dict_set(_gras_trp_plugins,
52 name, plug, gras_trp_plugin_free));
66 /* make room for all plugins */
67 TRY(gras_dict_new(&_gras_trp_plugins));
70 TRY(gras_trp_plugin_new("tcp", gras_trp_tcp_setup));
71 TRY(gras_trp_plugin_new("file",gras_trp_file_setup));
72 TRY(gras_trp_plugin_new("sg",gras_trp_sg_setup));
74 /* buf is composed, so it must come after the others */
75 TRY(gras_trp_plugin_new("buf", gras_trp_buf_setup));
82 gras_dict_free(&_gras_trp_plugins);
86 void gras_trp_plugin_free(void *p) {
87 gras_trp_plugin_t *plug = p;
92 } else if (plug->data) {
93 DEBUG1("Plugin %s lacks exit(). Free data anyway.",plug->name);
104 * gras_trp_socket_new:
106 * Malloc a new socket, and initialize it with defaults
108 gras_error_t gras_trp_socket_new(int incoming,
109 gras_socket_t **dst) {
113 if (! (sock=malloc(sizeof(gras_socket_t))) )
115 DEBUG1("Create a new socket (%p)", sock);
121 sock->incoming = incoming ? 1:0;
122 sock->outgoing = incoming ? 0:1;
123 sock->accepting = incoming ? 1:0;
126 sock->peer_port = -1;
127 sock->peer_name = NULL;
132 return gras_dynar_push(gras_socketset_get(),dst);
137 * gras_socket_server:
139 * Opens a server socket and make it ready to be listened to.
140 * In real life, you'll get a TCP socket.
143 gras_socket_server(unsigned short port,
144 /* OUT */ gras_socket_t **dst) {
146 gras_error_t errcode;
147 gras_trp_plugin_t *trp;
152 DEBUG1("Create a server socket from plugin %s",gras_if_RL() ? "tcp" : "sg");
153 TRY(gras_trp_plugin_get_by_name("buf",&trp));
155 /* defaults settings */
156 TRY(gras_trp_socket_new(1,&sock));
160 /* Call plugin socket creation function */
161 errcode = trp->socket_server(trp, port, sock);
162 DEBUG3("in=%c out=%c accept=%c",
163 sock->incoming?'y':'n',
164 sock->outgoing?'y':'n',
165 sock->accepting?'y':'n');
167 if (errcode != no_error) {
178 * gras_socket_client:
180 * Opens a client socket to a remote host.
181 * In real life, you'll get a TCP socket.
184 gras_socket_client(const char *host,
186 /* OUT */ gras_socket_t **dst) {
188 gras_error_t errcode;
189 gras_trp_plugin_t *trp;
194 TRY(gras_trp_plugin_get_by_name("buf",&trp));
196 DEBUG1("Create a client socket from plugin %s",gras_if_RL() ? "tcp" : "sg");
197 /* defaults settings */
198 TRY(gras_trp_socket_new(0,&sock));
200 sock->peer_port = port;
201 sock->peer_name = strdup(host?host:"localhost");
203 /* plugin-specific */
204 errcode= (*trp->socket_client)(trp,
205 host ? host : "localhost", port,
207 DEBUG3("in=%c out=%c accept=%c",
208 sock->incoming?'y':'n',
209 sock->outgoing?'y':'n',
210 sock->accepting?'y':'n');
212 if (errcode != no_error) {
222 void gras_socket_close(gras_socket_t *sock) {
223 gras_dynar_t *sockets = gras_socketset_get();
224 gras_socket_t *sock_iter;
227 /* FIXME: Issue an event when the socket is closed */
229 gras_dynar_foreach(sockets,cursor,sock_iter) {
230 if (sock == sock_iter) {
231 gras_dynar_cursor_rm(sockets,&cursor);
232 if ( sock->plugin->socket_close)
233 (* sock->plugin->socket_close)(sock);
235 /* free the memory */
237 free(sock->peer_name);
242 WARN0("Ignoring request to free an unknown socket");
247 * gras_trp_chunk_send:
249 * Send a bunch of bytes from on socket
252 gras_trp_chunk_send(gras_socket_t *sd,
255 gras_assert1(sd->outgoing,
256 "Socket not suited for data send (outgoing=%c)",
257 sd->outgoing?'y':'n');
258 gras_assert1(sd->plugin->chunk_send,
259 "No function chunk_send on transport plugin %s",
261 return (*sd->plugin->chunk_send)(sd,data,size);
264 * gras_trp_chunk_recv:
266 * Receive a bunch of bytes from a socket
269 gras_trp_chunk_recv(gras_socket_t *sd,
272 gras_assert0(sd->incoming,
273 "Socket not suited for data receive");
274 gras_assert1(sd->plugin->chunk_recv,
275 "No function chunk_recv on transport plugin %s",
277 return (sd->plugin->chunk_recv)(sd,data,size);
283 * Make sure all pending communications are done
286 gras_trp_flush(gras_socket_t *sd) {
287 return (sd->plugin->flush)(sd);
291 gras_trp_plugin_get_by_name(const char *name,
292 gras_trp_plugin_t **dst){
294 return gras_dict_get(_gras_trp_plugins,name,(void**)dst);
297 int gras_socket_my_port (gras_socket_t *sock) {
300 int gras_socket_peer_port(gras_socket_t *sock) {
301 return sock->peer_port;
303 char *gras_socket_peer_name(gras_socket_t *sock) {
304 return sock->peer_name;