3 /* buf trp (transport) - buffered transport using the TCP one */
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 <netinet/in.h> /* htonl/ntohl */
13 #include <string.h> /* memset */
15 #include "gras_private.h"
16 #include "transport_private.h"
18 GRAS_LOG_NEW_DEFAULT_SUBCATEGORY(trp_buf,transport);
23 gras_error_t gras_trp_buf_socket_client(gras_trp_plugin_t *self,
26 /* OUT */ gras_socket_t *sock);
27 gras_error_t gras_trp_buf_socket_server(gras_trp_plugin_t *self,
29 /* OUT */ gras_socket_t *sock);
30 gras_error_t gras_trp_buf_socket_accept(gras_socket_t *sock,
33 void gras_trp_buf_socket_close(gras_socket_t *sd);
35 gras_error_t gras_trp_buf_chunk_send(gras_socket_t *sd,
39 gras_error_t gras_trp_buf_chunk_recv(gras_socket_t *sd,
42 gras_error_t gras_trp_buf_flush(gras_socket_t *sock);
46 *** Specific plugin part
50 gras_trp_plugin_t *super;
51 } gras_trp_buf_plug_data_t;
54 *** Specific socket part
60 int pos; /* for receive; not exchanged over the net */
63 struct gras_trp_bufdata_{
69 gras_error_t gras_trp_buf_init_sock(gras_socket_t *sock) {
70 gras_trp_bufdata_t *data=malloc(sizeof(gras_trp_bufdata_t));
77 data->in.pos = 0; /* useless, indeed, since size==pos */
79 data->out.data = NULL;
81 // data->buffsize = 32 * 1024 - 4; /* default socket buffsize (32k) - headers */
82 data->buffsize = 100 * 1024 ; /* 100k */
92 gras_trp_buf_setup(gras_trp_plugin_t *plug) {
94 gras_trp_buf_plug_data_t *data =malloc(sizeof(gras_trp_buf_plug_data_t));
99 TRY(gras_trp_plugin_get_by_name(gras_if_RL() ? "tcp" : "sg",
101 DEBUG1("Derivate a buffer plugin from %s",gras_if_RL() ? "tcp" : "sg");
103 plug->socket_client = gras_trp_buf_socket_client;
104 plug->socket_server = gras_trp_buf_socket_server;
105 plug->socket_accept = gras_trp_buf_socket_accept;
106 plug->socket_close = gras_trp_buf_socket_close;
108 plug->chunk_send = gras_trp_buf_chunk_send;
109 plug->chunk_recv = gras_trp_buf_chunk_recv;
111 plug->flush = gras_trp_buf_flush;
113 plug->data = (void*)data;
119 gras_error_t gras_trp_buf_socket_client(gras_trp_plugin_t *self,
122 /* OUT */ gras_socket_t *sock){
123 gras_error_t errcode;
124 gras_trp_plugin_t *super=((gras_trp_buf_plug_data_t*)self->data)->super;
127 TRY(super->socket_client(super,host,port,sock));
129 TRY(gras_trp_buf_init_sock(sock));
135 * gras_trp_buf_socket_server:
137 * Open a socket used to receive messages.
139 gras_error_t gras_trp_buf_socket_server(gras_trp_plugin_t *self,
141 /* OUT */ gras_socket_t *sock){
142 gras_error_t errcode;
143 gras_trp_plugin_t *super=((gras_trp_buf_plug_data_t*)self->data)->super;
146 TRY(super->socket_server(super,port,sock));
148 TRY(gras_trp_buf_init_sock(sock));
153 gras_trp_buf_socket_accept(gras_socket_t *sock,
154 gras_socket_t **dst) {
155 gras_error_t errcode;
156 gras_trp_plugin_t *super=((gras_trp_buf_plug_data_t*)sock->plugin->data)->super;
159 TRY(super->socket_accept(sock,dst));
160 (*dst)->plugin = sock->plugin;
161 TRY(gras_trp_buf_init_sock(*dst));
165 void gras_trp_buf_socket_close(gras_socket_t *sock){
166 gras_trp_plugin_t *super=((gras_trp_buf_plug_data_t*)sock->plugin->data)->super;
167 gras_trp_bufdata_t *data=sock->bufdata;
170 if (data->in.size || data->out.size)
171 gras_trp_buf_flush(sock);
175 free(data->out.data);
178 return super->socket_close(sock);
182 * gras_trp_buf_chunk_send:
184 * Send data on a TCP socket
187 gras_trp_buf_chunk_send(gras_socket_t *sock,
191 gras_error_t errcode;
192 gras_trp_bufdata_t *data=(gras_trp_bufdata_t*)sock->bufdata;
196 /* Let underneath plugin check for direction, we work even in duplex */
197 gras_assert0(size >= 0, "Cannot send a negative amount of data");
199 if (!data->out.data && !(data->out.data = malloc(data->buffsize)))
202 while (chunk_pos < size) {
203 /* size of the chunck to receive in that shot */
204 long int thissize = min(size-chunk_pos,data->buffsize - data->out.size);
205 DEBUG5("Set the chars %d..%ld into the buffer (size=%ld, ctn='%.*s')",
207 ((int)data->out.size) + thissize -1,
208 size, chunk_pos, chunk);
210 memcpy(data->out.data + data->out.size, chunk + chunk_pos, thissize);
212 data->out.size += thissize;
213 chunk_pos += thissize;
214 DEBUG5("New pos = %d; Still to send = %ld of %ld; ctn sofar='%.*s'",
215 data->out.size,size-chunk_pos,size,(int)chunk_pos,chunk);
217 if (data->out.size == data->buffsize) /* out of space. Flush it */
218 TRY(gras_trp_buf_flush(sock));
226 * gras_trp_buf_chunk_recv:
228 * Receive data on a TCP socket.
231 gras_trp_buf_chunk_recv(gras_socket_t *sock,
235 gras_error_t errcode;
236 gras_trp_plugin_t *super=((gras_trp_buf_plug_data_t*)sock->plugin->data)->super;
237 gras_trp_bufdata_t *data=sock->bufdata;
238 long int chunck_pos = 0;
240 /* Let underneath plugin check for direction, we work even in duplex */
241 gras_assert0(sock, "Cannot recv on an NULL socket");
242 gras_assert0(size >= 0, "Cannot receive a negative amount of data");
245 if (!data->in.data && !(data->in.data = malloc(data->buffsize)))
248 while (chunck_pos < size) {
249 /* size of the chunck to receive in that shot */
252 if (data->in.size == data->in.pos) { /* out of data. Get more */
254 DEBUG0("Recv the size");
255 TRY(super->chunk_recv(sock,(char*)&nextsize, 4));
256 data->in.size = ntohl(nextsize);
258 VERB1("Recv the chunk (size=%d)",data->in.size);
259 TRY(super->chunk_recv(sock, data->in.data, data->in.size));
263 thissize = min(size-chunck_pos , data->in.size - data->in.pos);
264 DEBUG2("Get the chars %d..%ld out of the buffer",
266 data->in.pos + thissize - 1);
267 memcpy(chunk+chunck_pos, data->in.data + data->in.pos, thissize);
269 data->in.pos += thissize;
270 chunck_pos += thissize;
271 DEBUG5("New pos = %d; Still to receive = %ld of %ld. Ctn so far='%.*s'",
272 data->in.pos,size - chunck_pos,size,(int)chunck_pos,chunk);
280 * gras_trp_buf_flush:
282 * Make sure the data is sent
285 gras_trp_buf_flush(gras_socket_t *sock) {
286 gras_error_t errcode;
288 gras_trp_plugin_t *super=((gras_trp_buf_plug_data_t*)sock->plugin->data)->super;
289 gras_trp_bufdata_t *data=sock->bufdata;
292 size = htonl(data->out.size);
293 DEBUG1("Send the size (=%d)",data->out.size);
294 TRY(super->chunk_send(sock,(char*) &size, 4));
296 DEBUG1("Send the chunk (size=%d)",data->out.size);
297 TRY(super->chunk_send(sock, data->out.data, data->out.size));
298 VERB1("Chunk sent (size=%d)",data->out.size);