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));
76 // data->buffsize = 32 * 1024 - 4; /* default socket buffsize (32k) - headers */
77 data->buffsize = 100 * 1024 ; /* 100k */
79 if (!(data->in.data = malloc(data->buffsize)))
81 data->in.pos = 0; /* useless, indeed, since size==pos */
83 if (!(data->out.data = malloc(data->buffsize)))
95 gras_trp_buf_setup(gras_trp_plugin_t *plug) {
97 gras_trp_buf_plug_data_t *data =malloc(sizeof(gras_trp_buf_plug_data_t));
102 TRY(gras_trp_plugin_get_by_name(gras_if_RL() ? "tcp" : "sg",
104 DEBUG1("Derivate a buffer plugin from %s",gras_if_RL() ? "tcp" : "sg");
106 plug->socket_client = gras_trp_buf_socket_client;
107 plug->socket_server = gras_trp_buf_socket_server;
108 plug->socket_accept = gras_trp_buf_socket_accept;
109 plug->socket_close = gras_trp_buf_socket_close;
111 plug->chunk_send = gras_trp_buf_chunk_send;
112 plug->chunk_recv = gras_trp_buf_chunk_recv;
114 plug->flush = gras_trp_buf_flush;
116 plug->data = (void*)data;
122 gras_error_t gras_trp_buf_socket_client(gras_trp_plugin_t *self,
125 /* OUT */ gras_socket_t *sock){
126 gras_error_t errcode;
127 gras_trp_plugin_t *super=((gras_trp_buf_plug_data_t*)self->data)->super;
130 TRY(super->socket_client(super,host,port,sock));
132 TRY(gras_trp_buf_init_sock(sock));
138 * gras_trp_buf_socket_server:
140 * Open a socket used to receive messages.
142 gras_error_t gras_trp_buf_socket_server(gras_trp_plugin_t *self,
144 /* OUT */ gras_socket_t *sock){
145 gras_error_t errcode;
146 gras_trp_plugin_t *super=((gras_trp_buf_plug_data_t*)self->data)->super;
149 TRY(super->socket_server(super,port,sock));
151 TRY(gras_trp_buf_init_sock(sock));
156 gras_trp_buf_socket_accept(gras_socket_t *sock,
157 gras_socket_t **dst) {
158 gras_error_t errcode;
159 gras_trp_plugin_t *super=((gras_trp_buf_plug_data_t*)sock->plugin->data)->super;
162 TRY(super->socket_accept(sock,dst));
163 (*dst)->plugin = sock->plugin;
164 TRY(gras_trp_buf_init_sock(*dst));
168 void gras_trp_buf_socket_close(gras_socket_t *sock){
169 gras_trp_plugin_t *super=((gras_trp_buf_plug_data_t*)sock->plugin->data)->super;
170 gras_trp_bufdata_t *data=sock->bufdata;
173 if (data->in.size || data->out.size)
174 gras_trp_buf_flush(sock);
178 free(data->out.data);
181 return super->socket_close(sock);
185 * gras_trp_buf_chunk_send:
187 * Send data on a TCP socket
190 gras_trp_buf_chunk_send(gras_socket_t *sock,
194 gras_error_t errcode;
195 gras_trp_bufdata_t *data=(gras_trp_bufdata_t*)sock->bufdata;
199 /* Let underneath plugin check for direction, we work even in duplex */
200 gras_assert0(size >= 0, "Cannot send a negative amount of data");
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");
246 while (chunck_pos < size) {
247 /* size of the chunck to receive in that shot */
250 if (data->in.size == data->in.pos) { /* out of data. Get more */
252 DEBUG0("Recv the size");
253 TRY(super->chunk_recv(sock,(char*)&nextsize, 4));
254 data->in.size = ntohl(nextsize);
256 VERB1("Recv the chunk (size=%d)",data->in.size);
257 TRY(super->chunk_recv(sock, data->in.data, data->in.size));
261 thissize = min(size-chunck_pos , data->in.size - data->in.pos);
262 DEBUG2("Get the chars %d..%ld out of the buffer",
264 data->in.pos + thissize - 1);
265 memcpy(chunk+chunck_pos, data->in.data + data->in.pos, thissize);
267 data->in.pos += thissize;
268 chunck_pos += thissize;
269 DEBUG5("New pos = %d; Still to receive = %ld of %ld. Ctn so far='%.*s'",
270 data->in.pos,size - chunck_pos,size,(int)chunck_pos,chunk);
278 * gras_trp_buf_flush:
280 * Make sure the data is sent
283 gras_trp_buf_flush(gras_socket_t *sock) {
284 gras_error_t errcode;
286 gras_trp_plugin_t *super=((gras_trp_buf_plug_data_t*)sock->plugin->data)->super;
287 gras_trp_bufdata_t *data=sock->bufdata;
290 size = htonl(data->out.size);
291 DEBUG1("Send the size (=%d)",data->out.size);
292 TRY(super->chunk_send(sock,(char*) &size, 4));
294 DEBUG1("Send the chunk (size=%d)",data->out.size);
295 TRY(super->chunk_send(sock, data->out.data, data->out.size));
296 VERB1("Chunk sent (size=%d)",data->out.size);