+++ /dev/null
-/*
- * locate the originating host
- * $Id$
- */
-
-#include "sysdep.h"
-#include <stdlib.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <signal.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <limits.h>
-#include <netdb.h>
-#include <string.h>
-#ifdef HAVE_PTHREAD_H
-#include <pthread.h>
-#endif
-#include "citadel.h"
-#include "server.h"
-#include "locate_host.h"
-#include "config.h"
-
-void locate_host(char *tbuf)
-{
- struct sockaddr_in cs;
- struct hostent *ch, *ch2;
- int len;
- char *i;
- int a1, a2, a3, a4;
-
- len = sizeof(cs);
- if (getpeername(CC->client_socket, (struct sockaddr *) &cs, &len) < 0) {
- strcpy(tbuf, config.c_fqdn);
- return;
- }
-#ifdef HAVE_NONREENTRANT_NETDB
- begin_critical_section(S_NETDB);
-#endif
-
- if ((ch = gethostbyaddr((char *) &cs.sin_addr, sizeof(cs.sin_addr),
- AF_INET)) == NULL) {
- bad_dns:
- i = (char *) &cs.sin_addr;
- a1 = ((*i++) & 0xff);
- a2 = ((*i++) & 0xff);
- a3 = ((*i++) & 0xff);
- a4 = ((*i++) & 0xff);
- sprintf(tbuf, "%d.%d.%d.%d", a1, a2, a3, a4);
- goto end; /* because we might need to end the critical
- section */
- }
- /* check if the forward DNS agrees; if not, they're spoofing */
- if ((ch2 = gethostbyname(ch->h_name)) == NULL)
- goto bad_dns;
-
- /* check address for consistency */
- for (; *ch2->h_addr_list; ch2->h_addr_list++)
- if (!memcmp(*ch2->h_addr_list, &cs.sin_addr,
- sizeof cs.sin_addr)) {
- strncpy(tbuf, ch->h_name, 24);
- goto end;
- }
- goto bad_dns; /* they were spoofing. report a numeric IP
- address. */
-
- end:
-
-#ifdef HAVE_NONREENTRANT_NETDB
- end_critical_section(S_NETDB);
-#endif
-
- tbuf[24] = 0;
-}