2 meta.c -- handle the meta communication
3 Copyright (C) 2000 Guus Sliepen <guus@sliepen.warande.net>,
4 2000 Ivo Timmermans <itimmermans@bigfoot.com>
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 1.1.2.5 2000/10/21 11:52:06 guus Exp $
28 #include <sys/signal.h>
29 #include <sys/socket.h>
30 #include <openssl/evp.h>
35 int send_meta(conn_list_t *cl, char *buffer, int length)
37 char outbuf[MAXBUFSIZE];
41 if(debug_lvl >= DEBUG_META)
42 syslog(LOG_DEBUG, _("Sending %d bytes of metadata to %s (%s): %s"), length,
43 cl->name, cl->hostname, buffer);
45 buffer[length-1]='\n';
47 if(cl->status.encryptout)
49 EVP_EncryptUpdate(cl->cipher_outctx, outbuf, &outlen, buffer, length);
55 if(write(cl->meta_socket, bufp, length) < 0)
57 syslog(LOG_ERR, _("Sending meta data to %s (%s) failed: %m"), cl->name, cl->hostname);
64 int broadcast_meta(conn_list_t *cl, char *buffer, int length)
68 for(p = conn_list; p != NULL; p = p->next)
69 if(p != cl && p->status.meta && p->status.active)
70 send_meta(p, buffer, length);
75 int receive_meta(conn_list_t *cl)
80 char inbuf[MAXBUFSIZE];
83 if(getsockopt(cl->meta_socket, SOL_SOCKET, SO_ERROR, &x, &l) < 0)
85 syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m %s (%s)"), __FILE__, __LINE__, cl->meta_socket,
86 cl->name, cl->hostname);
91 syslog(LOG_ERR, _("Metadata socket error for %s (%s): %s"),
92 cl->name, cl->hostname, strerror(x));
96 if(cl->status.decryptin)
99 bufp = cl->buffer + cl->buflen;
101 lenin = read(cl->meta_socket, bufp, MAXBUFSIZE - cl->buflen);
109 if(debug_lvl >= DEBUG_CONNECTIONS)
110 syslog(LOG_NOTICE, _("Connection closed by %s (%s)"),
111 cl->name, cl->hostname);
114 syslog(LOG_ERR, _("Metadata socket read error for %s (%s): %m"),
115 cl->name, cl->hostname);
119 if(cl->status.decryptin)
121 EVP_DecryptUpdate(cl->cipher_inctx, cl->buffer + cl->buflen, NULL, inbuf, lenin);
131 for(i = oldlen; i < cl->buflen; i++)
133 if(cl->buffer[i] == '\n')
135 cl->buffer[i] = 0; /* replace end-of-line by end-of-string so we can use sscanf */
143 if(debug_lvl >= DEBUG_PROTOCOL)
144 syslog(LOG_DEBUG, _("Got request from %s (%s): %s"),
145 cl->name, cl->hostname, cl->buffer);
147 if(receive_request(cl))
150 cl->buflen -= cl->reqlen;
151 memmove(cl->buffer, cl->buffer + cl->reqlen, cl->buflen);
160 if(cl->buflen >= MAXBUFSIZE)
162 syslog(LOG_ERR, _("Metadata read buffer overflow for %s (%s)"),
163 cl->name, cl->hostname);
167 cl->last_ping_time = time(NULL);