+++ /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, const struct in_addr *addr)
-{
- struct hostent *ch;
- char *i;
- int a1, a2, a3, a4;
-
-#ifdef HAVE_NONREENTRANT_NETDB
- begin_critical_section(S_NETDB);
-#endif
-
- if ((ch = gethostbyaddr((char *) addr, sizeof(*addr), AF_INET)) ==
- NULL) {
- bad_dns:
- i = (char *) 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 */
- i = strdup(ch->h_name);
- ch = gethostbyname(i);
- free(i);
- if (ch == NULL)
- goto bad_dns;
-
- /* check address for consistency */
- for (; *ch->h_addr_list; ch->h_addr_list++)
- if (!memcmp(*ch->h_addr_list, addr,
- sizeof *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;
-}