2 meta.c -- handle the meta communication
3 Copyright (C) 2000-2002 Guus Sliepen <guus@sliepen.eu.org>,
4 2000-2002 Ivo Timmermans <ivo@o2w.nl>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 $Id: meta.c,v 1.1.2.32 2003/03/19 11:43:42 guus Exp $
31 /* This line must be below the rest for FreeBSD */
32 #include <sys/types.h>
33 #include <sys/socket.h>
35 #include <openssl/evp.h>
38 #include "connection.h"
42 int send_meta(connection_t *c, char *buffer, int length)
46 char outbuf[MAXBUFSIZE];
51 if(debug_lvl >= DEBUG_META)
52 syslog(LOG_DEBUG, _("Sending %d bytes of metadata to %s (%s)"), length,
53 c->name, c->hostname);
55 if(c->status.encryptout) {
56 EVP_EncryptUpdate(c->outctx, outbuf, &outlen, buffer, length);
63 result = write(c->socket, bufp, length);
67 syslog(LOG_ERR, _("Sending meta data to %s (%s) failed: %s"), c->name,
68 c->hostname, strerror(errno));
78 void broadcast_meta(connection_t *from, char *buffer, int length)
85 for(node = connection_tree->head; node; node = node->next) {
86 c = (connection_t *) node->data;
88 if(c != from && c->status.active)
89 send_meta(c, buffer, length);
93 int receive_meta(connection_t *c)
96 socklen_t l = sizeof(x);
100 char inbuf[MAXBUFSIZE];
104 if(getsockopt(c->socket, SOL_SOCKET, SO_ERROR, &x, &l) < 0) {
105 syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%s %s (%s)"), __FILE__,
106 __LINE__, c->socket, strerror(errno), c->name, c->hostname);
111 syslog(LOG_ERR, _("Metadata socket error for %s (%s): %s"),
112 c->name, c->hostname, strerror(x));
117 - Read as much as possible from the TCP socket in one go.
119 - Check if a full request is in the input buffer.
120 - If yes, process request and remove it from the buffer,
122 - If not, keep stuff in buffer and exit.
125 lenin = read(c->socket, c->buffer + c->buflen, MAXBUFSIZE - c->buflen);
129 if(debug_lvl >= DEBUG_CONNECTIONS)
130 syslog(LOG_NOTICE, _("Connection closed by %s (%s)"),
131 c->name, c->hostname);
132 } else if(errno == EINTR)
135 syslog(LOG_ERR, _("Metadata socket read error for %s (%s): %s"),
136 c->name, c->hostname, strerror(errno));
147 if(c->status.decryptin && !decrypted) {
148 EVP_DecryptUpdate(c->inctx, inbuf, &lenin, c->buffer + oldlen, lenin);
149 memcpy(c->buffer + oldlen, inbuf, lenin);
153 /* Are we receiving a TCPpacket? */
156 if(c->tcplen <= c->buflen) {
157 receive_tcppacket(c, c->buffer, c->tcplen);
159 c->buflen -= c->tcplen;
161 memmove(c->buffer, c->buffer + c->tcplen, c->buflen);
170 /* Otherwise we are waiting for a request */
174 for(i = oldlen; i < c->buflen; i++) {
175 if(c->buffer[i] == '\n') {
176 c->buffer[i] = '\0'; /* replace end-of-line by end-of-string so we can use sscanf */
184 if(receive_request(c))
189 memmove(c->buffer, c->buffer + reqlen, c->buflen);
197 if(c->buflen >= MAXBUFSIZE) {
198 syslog(LOG_ERR, _("Metadata read buffer overflow for %s (%s)"),
199 c->name, c->hostname);
203 c->last_ping_time = now;