server/tcpdchk.c

   1 /*
   2  * Copyright (c) 1995-1999, Index Data
   3  * See the file LICENSE for details.
   4  * Sebastian Hammer, Adam Dickmeiss
   5  *
   6  * $Log: tcpdchk.c,v $
   7  * Revision 1.1  1999-04-16 14:45:55  adam
   8  * Added interface for tcpd wrapper for access control.
   9  *
  10  */
  11
  12 #include <stdio.h>
  13 #include <string.h>
  14
  15 #if HAVE_TCPD_H
  16 #include <syslog.h>
  17 #include <tcpd.h>
  18
  19 int allow_severity = LOG_INFO;
  20 int deny_severity = LOG_WARNING;
  21
  22 #ifdef LOG_DEBUG
  23 #undef LOG_DEBUG
  24 #endif
  25 #ifdef LOG_WARN
  26 #undef LOG_WARN
  27 #endif
  28
  29 #endif
  30
  31 #ifdef WIN32
  32 #include <winsock.h>
  33 #else
  34 #include <unistd.h>
  35 #endif
  36
  37 #include <comstack.h>
  38 #include <statserv.h>
  39 #include <log.h>
  40
  41 int check_ip_tcpd(void *cd, const char *addr, int len, int type)
  42 {
  43     const char *daemon_name = cd;
  44
  45     if (type == AF_INET)
  46     {
  47         if (daemon_name && *daemon_name)
  48         {
  49 #if HAVE_TCPD_H
  50             struct request_info request_info;
  51 #endif
  52             int i;
  53             char *host_name = 0, *host_addr = 0;
  54             struct hostent *host;
  55
  56             struct sockaddr_in *addr_in = (struct sockaddr_in *) addr;
  57
  58             if ((host = gethostbyaddr((char*)&addr_in->sin_addr,
  59                                       sizeof(addr_in->sin_addr),
  60                                       AF_INET)))
  61                 host_name = (char*) host->h_name;
  62             host_addr = inet_ntoa(addr_in->sin_addr);
  63 #if HAVE_TCPD_H
  64             if (host_addr)
  65                 request_init(&request_info, RQ_DAEMON, daemon_name,
  66                              RQ_CLIENT_NAME, host_name,
  67                              RQ_CLIENT_SIN, addr_in,
  68                              RQ_CLIENT_ADDR, host_addr, 0);
  69             else
  70                 request_init(&request_info, RQ_DAEMON, daemon_name,
  71                              RQ_CLIENT_SIN, addr_in,
  72                              RQ_CLIENT_ADDR, host_addr, 0);
  73             i = hosts_access(&request_info);
  74             if (!i)
  75             {
  76                 logf (LOG_DEBUG, "access denied from %s",
  77                       host_name ? host_name : host_addr);
  78                 return 1;
  79             }
  80             logf (LOG_DEBUG, "access granted from %s",
  81                   host_name ? host_name : host_addr);
  82 #endif
  83         }
  84     }
  85     return 0;
  86 }
  87