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 1.1.2.29 2002/09/09 21:24:34 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];
50 if(debug_lvl >= DEBUG_META)
51 syslog(LOG_DEBUG, _("Sending %d bytes of metadata to %s (%s)"), length,
52 c->name, c->hostname);
54 if(c->status.encryptout) {
55 EVP_EncryptUpdate(c->outctx, outbuf, &outlen, buffer, length);
61 if(write(c->socket, bufp, length) < 0) {
62 syslog(LOG_ERR, _("Sending meta data to %s (%s) failed: %s"), c->name,
63 c->hostname, strerror(errno));
70 void broadcast_meta(connection_t * from, char *buffer, int length)
77 for(node = connection_tree->head; node; node = node->next) {
78 c = (connection_t *) node->data;
80 if(c != from && c->status.active)
81 send_meta(c, buffer, length);
85 int receive_meta(connection_t * c)
91 char inbuf[MAXBUFSIZE];
95 if(getsockopt(c->socket, SOL_SOCKET, SO_ERROR, &x, &l) < 0) {
96 syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%s %s (%s)"), __FILE__,
97 __LINE__, c->socket, strerror(errno), c->name, c->hostname);
102 syslog(LOG_ERR, _("Metadata socket error for %s (%s): %s"),
103 c->name, c->hostname, strerror(x));
108 - Read as much as possible from the TCP socket in one go.
110 - Check if a full request is in the input buffer.
111 - If yes, process request and remove it from the buffer,
113 - If not, keep stuff in buffer and exit.
116 lenin = read(c->socket, c->buffer + c->buflen, MAXBUFSIZE - c->buflen);
120 if(debug_lvl >= DEBUG_CONNECTIONS)
121 syslog(LOG_NOTICE, _("Connection closed by %s (%s)"),
122 c->name, c->hostname);
123 } else if(errno == EINTR)
126 syslog(LOG_ERR, _("Metadata socket read error for %s (%s): %s"),
127 c->name, c->hostname, strerror(errno));
138 if(c->status.decryptin && !decrypted) {
139 EVP_DecryptUpdate(c->inctx, inbuf, &lenin, c->buffer + oldlen,
141 memcpy(c->buffer + oldlen, inbuf, lenin);
145 /* Are we receiving a TCPpacket? */
148 if(c->tcplen <= c->buflen) {
149 receive_tcppacket(c, c->buffer, c->tcplen);
151 c->buflen -= c->tcplen;
153 memmove(c->buffer, c->buffer + c->tcplen, c->buflen);
162 /* Otherwise we are waiting for a request */
166 for(i = oldlen; i < c->buflen; i++) {
167 if(c->buffer[i] == '\n') {
168 c->buffer[i] = '\0'; /* replace end-of-line by end-of-string so we can use sscanf */
176 if(receive_request(c))
181 memmove(c->buffer, c->buffer + reqlen, c->buflen);
189 if(c->buflen >= MAXBUFSIZE) {
190 syslog(LOG_ERR, _("Metadata read buffer overflow for %s (%s)"),
191 c->name, c->hostname);
195 c->last_ping_time = now;