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Diff for /src/usr.bin/ssh/canohost.c between version 1.36 and 1.37

version 1.36, 2003/04/08 20:21:28 version 1.37, 2003/06/02 09:17:34
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  */   */
   
 static char *  static char *
 get_remote_hostname(int socket, int verify_reverse_mapping)  get_remote_hostname(int socket, int use_dns)
 {  {
         struct sockaddr_storage from;          struct sockaddr_storage from;
         int i;          int i;
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             NULL, 0, NI_NUMERICHOST) != 0)              NULL, 0, NI_NUMERICHOST) != 0)
                 fatal("get_remote_hostname: getnameinfo NI_NUMERICHOST failed");                  fatal("get_remote_hostname: getnameinfo NI_NUMERICHOST failed");
   
           if (!use_dns)
                   return xstrdup(ntop);
   
         if (from.ss_family == AF_INET)          if (from.ss_family == AF_INET)
                 check_ip_options(socket, ntop);                  check_ip_options(socket, ntop);
   
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         if (getnameinfo((struct sockaddr *)&from, fromlen, name, sizeof(name),          if (getnameinfo((struct sockaddr *)&from, fromlen, name, sizeof(name),
             NULL, 0, NI_NAMEREQD) != 0) {              NULL, 0, NI_NAMEREQD) != 0) {
                 /* Host name not found.  Use ip address. */                  /* Host name not found.  Use ip address. */
 #if 0  
                 logit("Could not reverse map address %.100s.", ntop);  
 #endif  
                 return xstrdup(ntop);                  return xstrdup(ntop);
         }          }
   
         /* Got host name. */  
         name[sizeof(name) - 1] = '\0';  
         /*          /*
            * if reverse lookup result looks like a numeric hostname,
            * someone is trying to trick us by PTR record like following:
            *      1.1.1.10.in-addr.arpa.  IN PTR  2.3.4.5
            */
           memset(&hints, 0, sizeof(hints));
           hints.ai_socktype = SOCK_DGRAM; /*dummy*/
           hints.ai_flags = AI_NUMERICHOST;
           if (getaddrinfo(name, "0", &hints, &ai) == 0) {
                   logit("Nasty PTR record \"%s\" is set up for %s, ignoring",
                       name, ntop);
                   freeaddrinfo(ai);
                   return xstrdup(ntop);
           }
   
           /*
          * Convert it to all lowercase (which is expected by the rest           * Convert it to all lowercase (which is expected by the rest
          * of this software).           * of this software).
          */           */
         for (i = 0; name[i]; i++)          for (i = 0; name[i]; i++)
                 if (isupper(name[i]))                  if (isupper(name[i]))
                         name[i] = tolower(name[i]);                          name[i] = tolower(name[i]);
   
         if (!verify_reverse_mapping)  
                 return xstrdup(name);  
         /*          /*
          * Map it back to an IP address and check that the given           * Map it back to an IP address and check that the given
          * address actually is an address of this host.  This is           * address actually is an address of this host.  This is
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  */   */
   
 const char *  const char *
 get_canonical_hostname(int verify_reverse_mapping)  get_canonical_hostname(int use_dns)
 {  {
         static char *canonical_host_name = NULL;          static char *canonical_host_name = NULL;
         static int verify_reverse_mapping_done = 0;          static int use_dns_done = 0;
   
         /* Check if we have previously retrieved name with same option. */          /* Check if we have previously retrieved name with same option. */
         if (canonical_host_name != NULL) {          if (canonical_host_name != NULL) {
                 if (verify_reverse_mapping_done != verify_reverse_mapping)                  if (use_dns_done != use_dns)
                         xfree(canonical_host_name);                          xfree(canonical_host_name);
                 else                  else
                         return canonical_host_name;                          return canonical_host_name;
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         /* Get the real hostname if socket; otherwise return UNKNOWN. */          /* Get the real hostname if socket; otherwise return UNKNOWN. */
         if (packet_connection_is_on_socket())          if (packet_connection_is_on_socket())
                 canonical_host_name = get_remote_hostname(                  canonical_host_name = get_remote_hostname(
                     packet_get_connection_in(), verify_reverse_mapping);                      packet_get_connection_in(), use_dns);
         else          else
                 canonical_host_name = xstrdup("UNKNOWN");                  canonical_host_name = xstrdup("UNKNOWN");
   
         verify_reverse_mapping_done = verify_reverse_mapping;          use_dns_done = use_dns;
         return canonical_host_name;          return canonical_host_name;
 }  }
   
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 }  }
   
 const char *  const char *
 get_remote_name_or_ip(u_int utmp_len, int verify_reverse_mapping)  get_remote_name_or_ip(u_int utmp_len, int use_dns)
 {  {
         static const char *remote = "";          static const char *remote = "";
         if (utmp_len > 0)          if (utmp_len > 0)
                 remote = get_canonical_hostname(verify_reverse_mapping);                  remote = get_canonical_hostname(use_dns);
         if (utmp_len == 0 || strlen(remote) > utmp_len)          if (utmp_len == 0 || strlen(remote) > utmp_len)
                 remote = get_remote_ipaddr();                  remote = get_remote_ipaddr();
         return remote;          return remote;
Legend:
Removed from v.1.36  
changed lines
  Added in v.1.37