source/utils/net_lookup.c

   1 /*
   2    Samba Unix/Linux SMB client library
   3    net lookup command
   4    Copyright (C) 2001 Andrew Tridgell (tridge@samba.org)
   5
   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.
  10
  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.
  15
  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.  */
  19
  20 #include "includes.h"
  21 #include "utils/net.h"
  22
  23 int net_lookup_usage(int argc, const char **argv)
  24 {
  25         d_printf(
  26 "  net lookup [host] HOSTNAME[#<type>]\n\tgives IP for a hostname\n\n"
  27 "  net lookup ldap [domain]\n\tgives IP of domain's ldap server\n\n"
  28 "  net lookup kdc [realm]\n\tgives IP of realm's kerberos KDC\n\n"
  29 "  net lookup dc [domain]\n\tgives IP of domains Domain Controllers\n\n"
  30 "  net lookup master [domain|wg]\n\tgive IP of master browser\n\n"
  31 );
  32         return -1;
  33 }
  34
  35 /* lookup a hostname giving an IP */
  36 static int net_lookup_host(int argc, const char **argv)
  37 {
  38         struct in_addr ip;
  39         int name_type = 0x20;
  40         const char *name = argv[0];
  41         char *p;
  42
  43         if (argc == 0)
  44                 return net_lookup_usage(argc, argv);
  45
  46         p = strchr_m(name,'#');
  47         if (p) {
  48                 *p = '\0';
  49                 sscanf(++p,"%x",&name_type);
  50         }
  51
  52         if (!resolve_name(name, &ip, name_type)) {
  53                 /* we deliberately use DEBUG() here to send it to stderr
  54                    so scripts aren't mucked up */
  55                 DEBUG(0,("Didn't find %s#%02x\n", name, name_type));
  56                 return -1;
  57         }
  58
  59         d_printf("%s\n", inet_ntoa(ip));
  60         return 0;
  61 }
  62
  63 static void print_ldap_srvlist(char *srvlist)
  64 {
  65         char *cur, *next;
  66         struct in_addr ip;
  67         BOOL printit;
  68
  69         cur = srvlist;
  70         do {
  71                 next = strchr(cur,':');
  72                 if (next) *next++='\0';
  73                 printit = resolve_name(cur, &ip, 0x20);
  74                 cur=next;
  75                 next=cur ? strchr(cur,' ') :NULL;
  76                 if (next)
  77                         *next++='\0';
  78                 if (printit)
  79                         d_printf("%s:%s\n", inet_ntoa(ip), cur?cur:"");
  80                 cur = next;
  81         } while (next);
  82 }
  83
  84
  85 static int net_lookup_ldap(int argc, const char **argv)
  86 {
  87 #ifdef HAVE_LDAP
  88         char *srvlist;
  89         const char *domain;
  90         int rc;
  91         struct in_addr addr;
  92         struct hostent *hostent;
  93
  94         if (argc > 0)
  95                 domain = argv[0];
  96         else
  97                 domain = opt_target_workgroup;
  98
  99         DEBUG(9, ("Lookup up ldap for domain %s\n", domain));
 100         rc = ldap_domain2hostlist(domain, &srvlist);
 101         if ((rc == LDAP_SUCCESS) && srvlist) {
 102                 print_ldap_srvlist(srvlist);
 103                 return 0;
 104         }
 105
 106         DEBUG(9, ("Looking up DC for domain %s\n", domain));
 107         if (!get_pdc_ip(domain, &addr))
 108                 return -1;
 109
 110         hostent = gethostbyaddr((char *) &addr.s_addr, sizeof(addr.s_addr),
 111                                 AF_INET);
 112         if (!hostent)
 113                 return -1;
 114
 115         DEBUG(9, ("Found DC with DNS name %s\n", hostent->h_name));
 116         domain = strchr(hostent->h_name, '.');
 117         if (!domain)
 118                 return -1;
 119         domain++;
 120
 121         DEBUG(9, ("Looking up ldap for domain %s\n", domain));
 122         rc = ldap_domain2hostlist(domain, &srvlist);
 123         if ((rc == LDAP_SUCCESS) && srvlist) {
 124                 print_ldap_srvlist(srvlist);
 125                 return 0;
 126         }
 127         return -1;
 128 #endif
 129         DEBUG(1,("No LDAP support\n"));
 130         return -1;
 131 }
 132
 133 static int net_lookup_dc(int argc, const char **argv)
 134 {
 135         struct ip_service *ip_list;
 136         struct in_addr addr;
 137         char *pdc_str = NULL;
 138         const char *domain=opt_target_workgroup;
 139         int count, i;
 140
 141         if (argc > 0)
 142                 domain=argv[0];
 143
 144         /* first get PDC */
 145         if (!get_pdc_ip(domain, &addr))
 146                 return -1;
 147
 148         asprintf(&pdc_str, "%s", inet_ntoa(addr));
 149         d_printf("%s\n", pdc_str);
 150
 151         if (!get_sorted_dc_list(domain, &ip_list, &count, False)) {
 152                 SAFE_FREE(pdc_str);
 153                 return 0;
 154         }
 155         for (i=0;i<count;i++) {
 156                 char *dc_str = inet_ntoa(ip_list[i].ip);
 157                 if (!strequal(pdc_str, dc_str))
 158                         d_printf("%s\n", dc_str);
 159         }
 160         SAFE_FREE(pdc_str);
 161         return 0;
 162 }
 163
 164 static int net_lookup_master(int argc, const char **argv)
 165 {
 166         struct in_addr master_ip;
 167         const char *domain=opt_target_workgroup;
 168
 169         if (argc > 0)
 170                 domain=argv[0];
 171
 172         if (!find_master_ip(domain, &master_ip))
 173                 return -1;
 174         d_printf("%s\n", inet_ntoa(master_ip));
 175         return 0;
 176 }
 177
 178 static int net_lookup_kdc(int argc, const char **argv)
 179 {
 180 #ifdef HAVE_KRB5
 181         krb5_error_code rc;
 182         krb5_context ctx;
 183         struct sockaddr_in *addrs;
 184         int num_kdcs,i;
 185         krb5_data realm;
 186         char **realms;
 187
 188         rc = krb5_init_context(&ctx);
 189         if (rc) {
 190                 DEBUG(1,("krb5_init_context failed (%s)\n",
 191                          error_message(rc)));
 192                 return -1;
 193         }
 194
 195         if (argc>0) {
 196                 realm.data = (krb5_pointer) argv[0];
 197                 realm.length = strlen(argv[0]);
 198         } else if (lp_realm() && *lp_realm()) {
 199                 realm.data = (krb5_pointer) lp_realm();
 200                 realm.length = strlen(realm.data);
 201         } else {
 202                 rc = krb5_get_host_realm(ctx, NULL, &realms);
 203                 if (rc) {
 204                         DEBUG(1,("krb5_gethost_realm failed (%s)\n",
 205                                  error_message(rc)));
 206                         return -1;
 207                 }
 208                 realm.data = (krb5_pointer) *realms;
 209                 realm.length = strlen(realm.data);
 210         }
 211
 212         rc = krb5_locate_kdc(ctx, &realm, &addrs, &num_kdcs, 0);
 213         if (rc) {
 214                 DEBUG(1, ("krb5_locate_kdc failed (%s)\n", error_message(rc)));
 215                 return -1;
 216         }
 217         for (i=0;i<num_kdcs;i++)
 218                 if (addrs[i].sin_family == AF_INET)
 219                         d_printf("%s:%hd\n", inet_ntoa(addrs[i].sin_addr),
 220                                  ntohs(addrs[i].sin_port));
 221         return 0;
 222
 223 #endif
 224         DEBUG(1, ("No kerberos support\n"));
 225         return -1;
 226 }
 227
 228
 229 /* lookup hosts or IP addresses using internal samba lookup fns */
 230 int net_lookup(int argc, const char **argv)
 231 {
 232         int i;
 233
 234         struct functable table[] = {
 235                 {"HOST", net_lookup_host},
 236                 {"LDAP", net_lookup_ldap},
 237                 {"DC", net_lookup_dc},
 238                 {"MASTER", net_lookup_master},
 239                 {"KDC", net_lookup_kdc},
 240                 {NULL, NULL}
 241         };
 242
 243         if (argc < 1) {
 244                 d_printf("\nUsage: \n");
 245                 return net_lookup_usage(argc, argv);
 246         }
 247         for (i=0; table[i].funcname; i++) {
 248                 if (StrCaseCmp(argv[0], table[i].funcname) == 0)
 249                         return table[i].fn(argc-1, argv+1);
 250         }
 251
 252         /* Default to lookup a hostname so 'net lookup foo#1b' can be
 253            used instead of 'net lookup host foo#1b'.  The host syntax
 254            is a bit confusing as non #00 names can't really be
 255            considered hosts as such. */
 256
 257         return net_lookup_host(argc, argv);
 258 }