mirror of
https://github.com/samba-team/samba.git
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d047db2807
Jeremy.
(This used to be commit 15185ac437
)
1359 lines
34 KiB
C
1359 lines
34 KiB
C
/*
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Unix SMB/CIFS implementation.
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name query routines
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Copyright (C) Andrew Tridgell 1994-1998
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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/* nmbd.c sets this to True. */
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BOOL global_in_nmbd = False;
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/****************************************************************************
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generate a random trn_id
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****************************************************************************/
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static int generate_trn_id(void)
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{
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static int trn_id;
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if (trn_id == 0) {
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sys_srandom(sys_getpid());
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}
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trn_id = sys_random();
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return trn_id % (unsigned)0x7FFF;
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}
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/****************************************************************************
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parse a node status response into an array of structures
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****************************************************************************/
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static struct node_status *parse_node_status(char *p, int *num_names)
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{
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struct node_status *ret;
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int i;
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*num_names = CVAL(p,0);
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if (*num_names == 0) return NULL;
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ret = (struct node_status *)malloc(sizeof(struct node_status)* (*num_names));
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if (!ret) return NULL;
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p++;
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for (i=0;i< *num_names;i++) {
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StrnCpy(ret[i].name,p,15);
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trim_string(ret[i].name,NULL," ");
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ret[i].type = CVAL(p,15);
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ret[i].flags = p[16];
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p += 18;
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DEBUG(10, ("%s#%02x: flags = 0x%02x\n", ret[i].name,
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ret[i].type, ret[i].flags));
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}
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return ret;
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}
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/****************************************************************************
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do a NBT node status query on an open socket and return an array of
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structures holding the returned names or NULL if the query failed
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**************************************************************************/
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struct node_status *node_status_query(int fd,struct nmb_name *name,
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struct in_addr to_ip, int *num_names)
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{
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BOOL found=False;
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int retries = 2;
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int retry_time = 2000;
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struct timeval tval;
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struct packet_struct p;
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struct packet_struct *p2;
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struct nmb_packet *nmb = &p.packet.nmb;
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struct node_status *ret;
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ZERO_STRUCT(p);
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nmb->header.name_trn_id = generate_trn_id();
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nmb->header.opcode = 0;
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nmb->header.response = False;
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nmb->header.nm_flags.bcast = False;
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nmb->header.nm_flags.recursion_available = False;
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nmb->header.nm_flags.recursion_desired = False;
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nmb->header.nm_flags.trunc = False;
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nmb->header.nm_flags.authoritative = False;
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nmb->header.rcode = 0;
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nmb->header.qdcount = 1;
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nmb->header.ancount = 0;
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nmb->header.nscount = 0;
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nmb->header.arcount = 0;
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nmb->question.question_name = *name;
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nmb->question.question_type = 0x21;
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nmb->question.question_class = 0x1;
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p.ip = to_ip;
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p.port = NMB_PORT;
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p.fd = fd;
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p.timestamp = time(NULL);
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p.packet_type = NMB_PACKET;
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GetTimeOfDay(&tval);
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if (!send_packet(&p))
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return NULL;
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retries--;
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while (1) {
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struct timeval tval2;
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GetTimeOfDay(&tval2);
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if (TvalDiff(&tval,&tval2) > retry_time) {
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if (!retries)
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break;
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if (!found && !send_packet(&p))
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return NULL;
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GetTimeOfDay(&tval);
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retries--;
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}
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if ((p2=receive_nmb_packet(fd,90,nmb->header.name_trn_id))) {
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struct nmb_packet *nmb2 = &p2->packet.nmb;
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debug_nmb_packet(p2);
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if (nmb2->header.opcode != 0 ||
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nmb2->header.nm_flags.bcast ||
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nmb2->header.rcode ||
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!nmb2->header.ancount ||
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nmb2->answers->rr_type != 0x21) {
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/* XXXX what do we do with this? could be a
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redirect, but we'll discard it for the
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moment */
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free_packet(p2);
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continue;
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}
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ret = parse_node_status(&nmb2->answers->rdata[0], num_names);
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free_packet(p2);
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return ret;
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}
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}
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return NULL;
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}
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/****************************************************************************
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find the first type XX name in a node status reply - used for finding
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a servers name given its IP
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return the matched name in *name
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**************************************************************************/
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BOOL name_status_find(const char *q_name, int q_type, int type, struct in_addr to_ip, char *name)
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{
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struct node_status *status = NULL;
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struct nmb_name nname;
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int count, i;
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int sock;
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BOOL result = False;
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if (lp_disable_netbios()) {
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DEBUG(5,("name_status_find(%s#%02x): netbios is disabled\n", q_name, q_type));
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return False;
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}
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DEBUG(10, ("name_status_find: looking up %s#%02x at %s\n", q_name,
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q_type, inet_ntoa(to_ip)));
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sock = open_socket_in(SOCK_DGRAM, 0, 3, interpret_addr(lp_socket_address()), True);
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if (sock == -1)
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goto done;
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/* W2K PDC's seem not to respond to '*'#0. JRA */
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make_nmb_name(&nname, q_name, q_type);
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status = node_status_query(sock, &nname, to_ip, &count);
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close(sock);
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if (!status)
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goto done;
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for (i=0;i<count;i++) {
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if (status[i].type == type)
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break;
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}
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if (i == count)
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goto done;
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pull_ascii(name, status[i].name, 16, 15, STR_TERMINATE);
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result = True;
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done:
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SAFE_FREE(status);
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DEBUG(10, ("name_status_find: name %sfound", result ? "" : "not "));
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if (result)
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DEBUGADD(10, (", ip address is %s", inet_ntoa(to_ip)));
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DEBUG(10, ("\n"));
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return result;
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}
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/*
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comparison function used by sort_ip_list
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*/
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int ip_compare(struct in_addr *ip1, struct in_addr *ip2)
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{
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int max_bits1=0, max_bits2=0;
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int num_interfaces = iface_count();
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int i;
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for (i=0;i<num_interfaces;i++) {
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struct in_addr ip;
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int bits1, bits2;
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ip = *iface_n_bcast(i);
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bits1 = matching_quad_bits((uchar *)&ip1->s_addr, (uchar *)&ip.s_addr);
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bits2 = matching_quad_bits((uchar *)&ip2->s_addr, (uchar *)&ip.s_addr);
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max_bits1 = MAX(bits1, max_bits1);
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max_bits2 = MAX(bits2, max_bits2);
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}
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/* bias towards directly reachable IPs */
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if (iface_local(*ip1)) {
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max_bits1 += 32;
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}
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if (iface_local(*ip2)) {
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max_bits2 += 32;
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}
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return max_bits2 - max_bits1;
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}
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/*
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sort an IP list so that names that are close to one of our interfaces
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are at the top. This prevents the problem where a WINS server returns an IP that
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is not reachable from our subnet as the first match
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*/
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static void sort_ip_list(struct in_addr *iplist, int count)
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{
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if (count <= 1) {
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return;
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}
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qsort(iplist, count, sizeof(struct in_addr), QSORT_CAST ip_compare);
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}
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/****************************************************************************
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Do a netbios name query to find someones IP.
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Returns an array of IP addresses or NULL if none.
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*count will be set to the number of addresses returned.
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*timed_out is set if we failed by timing out
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****************************************************************************/
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struct in_addr *name_query(int fd,const char *name,int name_type,
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BOOL bcast,BOOL recurse,
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struct in_addr to_ip, int *count, int *flags,
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BOOL *timed_out)
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{
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BOOL found=False;
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int i, retries = 3;
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int retry_time = bcast?250:2000;
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struct timeval tval;
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struct packet_struct p;
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struct packet_struct *p2;
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struct nmb_packet *nmb = &p.packet.nmb;
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struct in_addr *ip_list = NULL;
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if (lp_disable_netbios()) {
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DEBUG(5,("name_query(%s#%02x): netbios is disabled\n", name, name_type));
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return NULL;
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}
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if (timed_out) {
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*timed_out = False;
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}
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memset((char *)&p,'\0',sizeof(p));
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(*count) = 0;
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(*flags) = 0;
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nmb->header.name_trn_id = generate_trn_id();
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nmb->header.opcode = 0;
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nmb->header.response = False;
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nmb->header.nm_flags.bcast = bcast;
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nmb->header.nm_flags.recursion_available = False;
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nmb->header.nm_flags.recursion_desired = recurse;
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nmb->header.nm_flags.trunc = False;
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nmb->header.nm_flags.authoritative = False;
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nmb->header.rcode = 0;
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nmb->header.qdcount = 1;
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nmb->header.ancount = 0;
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nmb->header.nscount = 0;
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nmb->header.arcount = 0;
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make_nmb_name(&nmb->question.question_name,name,name_type);
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nmb->question.question_type = 0x20;
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nmb->question.question_class = 0x1;
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p.ip = to_ip;
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p.port = NMB_PORT;
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p.fd = fd;
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p.timestamp = time(NULL);
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p.packet_type = NMB_PACKET;
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GetTimeOfDay(&tval);
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if (!send_packet(&p))
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return NULL;
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retries--;
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while (1) {
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struct timeval tval2;
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struct in_addr *tmp_ip_list;
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GetTimeOfDay(&tval2);
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if (TvalDiff(&tval,&tval2) > retry_time) {
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if (!retries)
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break;
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if (!found && !send_packet(&p))
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return NULL;
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GetTimeOfDay(&tval);
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retries--;
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}
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if ((p2=receive_nmb_packet(fd,90,nmb->header.name_trn_id))) {
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struct nmb_packet *nmb2 = &p2->packet.nmb;
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debug_nmb_packet(p2);
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/* If we get a Negative Name Query Response from a WINS
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* server, we should report it and give up.
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*/
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if( 0 == nmb2->header.opcode /* A query response */
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&& !(bcast) /* from a WINS server */
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&& nmb2->header.rcode /* Error returned */
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) {
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if( DEBUGLVL( 3 ) ) {
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/* Only executed if DEBUGLEVEL >= 3 */
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dbgtext( "Negative name query response, rcode 0x%02x: ", nmb2->header.rcode );
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switch( nmb2->header.rcode ) {
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case 0x01:
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dbgtext( "Request was invalidly formatted.\n" );
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break;
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case 0x02:
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dbgtext( "Problem with NBNS, cannot process name.\n");
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break;
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case 0x03:
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dbgtext( "The name requested does not exist.\n" );
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break;
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case 0x04:
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dbgtext( "Unsupported request error.\n" );
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break;
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case 0x05:
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dbgtext( "Query refused error.\n" );
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break;
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default:
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dbgtext( "Unrecognized error code.\n" );
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break;
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}
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}
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free_packet(p2);
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return( NULL );
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}
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if (nmb2->header.opcode != 0 ||
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nmb2->header.nm_flags.bcast ||
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nmb2->header.rcode ||
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!nmb2->header.ancount) {
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/*
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* XXXX what do we do with this? Could be a
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* redirect, but we'll discard it for the
|
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* moment.
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*/
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free_packet(p2);
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continue;
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}
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tmp_ip_list = (struct in_addr *)Realloc( ip_list, sizeof( ip_list[0] )
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* ( (*count) + nmb2->answers->rdlength/6 ) );
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if (!tmp_ip_list) {
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DEBUG(0,("name_query: Realloc failed.\n"));
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SAFE_FREE(ip_list);
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}
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ip_list = tmp_ip_list;
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if (ip_list) {
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DEBUG(2,("Got a positive name query response from %s ( ", inet_ntoa(p2->ip)));
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for (i=0;i<nmb2->answers->rdlength/6;i++) {
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putip((char *)&ip_list[(*count)],&nmb2->answers->rdata[2+i*6]);
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DEBUGADD(2,("%s ",inet_ntoa(ip_list[(*count)])));
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(*count)++;
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}
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DEBUGADD(2,(")\n"));
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}
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found=True;
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retries=0;
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/* We add the flags back ... */
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if (nmb2->header.response)
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(*flags) |= NM_FLAGS_RS;
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if (nmb2->header.nm_flags.authoritative)
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(*flags) |= NM_FLAGS_AA;
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if (nmb2->header.nm_flags.trunc)
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(*flags) |= NM_FLAGS_TC;
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if (nmb2->header.nm_flags.recursion_desired)
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(*flags) |= NM_FLAGS_RD;
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if (nmb2->header.nm_flags.recursion_available)
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(*flags) |= NM_FLAGS_RA;
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if (nmb2->header.nm_flags.bcast)
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(*flags) |= NM_FLAGS_B;
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free_packet(p2);
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/*
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* If we're doing a unicast lookup we only
|
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* expect one reply. Don't wait the full 2
|
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* seconds if we got one. JRA.
|
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*/
|
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if(!bcast && found)
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break;
|
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}
|
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}
|
|
|
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if (timed_out) {
|
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*timed_out = True;
|
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}
|
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|
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/* sort the ip list so we choose close servers first if possible */
|
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sort_ip_list(ip_list, *count);
|
|
|
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return ip_list;
|
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}
|
|
|
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/********************************************************
|
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Start parsing the lmhosts file.
|
|
*********************************************************/
|
|
|
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XFILE *startlmhosts(char *fname)
|
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{
|
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XFILE *fp = x_fopen(fname,O_RDONLY, 0);
|
|
if (!fp) {
|
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DEBUG(4,("startlmhosts: Can't open lmhosts file %s. Error was %s\n",
|
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fname, strerror(errno)));
|
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return NULL;
|
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}
|
|
return fp;
|
|
}
|
|
|
|
/********************************************************
|
|
Parse the next line in the lmhosts file.
|
|
*********************************************************/
|
|
|
|
BOOL getlmhostsent( XFILE *fp, pstring name, int *name_type, struct in_addr *ipaddr)
|
|
{
|
|
pstring line;
|
|
|
|
while(!x_feof(fp) && !x_ferror(fp)) {
|
|
pstring ip,flags,extra;
|
|
const char *ptr;
|
|
char *ptr1;
|
|
int count = 0;
|
|
|
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*name_type = -1;
|
|
|
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if (!fgets_slash(line,sizeof(pstring),fp))
|
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continue;
|
|
|
|
if (*line == '#')
|
|
continue;
|
|
|
|
pstrcpy(ip,"");
|
|
pstrcpy(name,"");
|
|
pstrcpy(flags,"");
|
|
|
|
ptr = line;
|
|
|
|
if (next_token(&ptr,ip ,NULL,sizeof(ip)))
|
|
++count;
|
|
if (next_token(&ptr,name ,NULL, sizeof(pstring)))
|
|
++count;
|
|
if (next_token(&ptr,flags,NULL, sizeof(flags)))
|
|
++count;
|
|
if (next_token(&ptr,extra,NULL, sizeof(extra)))
|
|
++count;
|
|
|
|
if (count <= 0)
|
|
continue;
|
|
|
|
if (count > 0 && count < 2)
|
|
{
|
|
DEBUG(0,("getlmhostsent: Ill formed hosts line [%s]\n",line));
|
|
continue;
|
|
}
|
|
|
|
if (count >= 4)
|
|
{
|
|
DEBUG(0,("getlmhostsent: too many columns in lmhosts file (obsolete syntax)\n"));
|
|
continue;
|
|
}
|
|
|
|
DEBUG(4, ("getlmhostsent: lmhost entry: %s %s %s\n", ip, name, flags));
|
|
|
|
if (strchr_m(flags,'G') || strchr_m(flags,'S'))
|
|
{
|
|
DEBUG(0,("getlmhostsent: group flag in lmhosts ignored (obsolete)\n"));
|
|
continue;
|
|
}
|
|
|
|
*ipaddr = *interpret_addr2(ip);
|
|
|
|
/* Extra feature. If the name ends in '#XX', where XX is a hex number,
|
|
then only add that name type. */
|
|
if((ptr1 = strchr_m(name, '#')) != NULL)
|
|
{
|
|
char *endptr;
|
|
|
|
ptr1++;
|
|
*name_type = (int)strtol(ptr1, &endptr, 16);
|
|
|
|
if(!*ptr1 || (endptr == ptr1))
|
|
{
|
|
DEBUG(0,("getlmhostsent: invalid name %s containing '#'.\n", name));
|
|
continue;
|
|
}
|
|
|
|
*(--ptr1) = '\0'; /* Truncate at the '#' */
|
|
}
|
|
|
|
return True;
|
|
}
|
|
|
|
return False;
|
|
}
|
|
|
|
/********************************************************
|
|
Finish parsing the lmhosts file.
|
|
*********************************************************/
|
|
|
|
void endlmhosts(XFILE *fp)
|
|
{
|
|
x_fclose(fp);
|
|
}
|
|
|
|
|
|
/********************************************************
|
|
Resolve via "bcast" method.
|
|
*********************************************************/
|
|
|
|
BOOL name_resolve_bcast(const char *name, int name_type,
|
|
struct in_addr **return_ip_list, int *return_count)
|
|
{
|
|
int sock, i;
|
|
int num_interfaces = iface_count();
|
|
|
|
if (lp_disable_netbios()) {
|
|
DEBUG(5,("name_resolve_bcast(%s#%02x): netbios is disabled\n", name, name_type));
|
|
return False;
|
|
}
|
|
|
|
*return_ip_list = NULL;
|
|
*return_count = 0;
|
|
|
|
/*
|
|
* "bcast" means do a broadcast lookup on all the local interfaces.
|
|
*/
|
|
|
|
DEBUG(3,("name_resolve_bcast: Attempting broadcast lookup for name %s<0x%x>\n", name, name_type));
|
|
|
|
sock = open_socket_in( SOCK_DGRAM, 0, 3,
|
|
interpret_addr(lp_socket_address()), True );
|
|
|
|
if (sock == -1) return False;
|
|
|
|
set_socket_options(sock,"SO_BROADCAST");
|
|
/*
|
|
* Lookup the name on all the interfaces, return on
|
|
* the first successful match.
|
|
*/
|
|
for( i = num_interfaces-1; i >= 0; i--) {
|
|
struct in_addr sendto_ip;
|
|
int flags;
|
|
/* Done this way to fix compiler error on IRIX 5.x */
|
|
sendto_ip = *iface_n_bcast(i);
|
|
*return_ip_list = name_query(sock, name, name_type, True,
|
|
True, sendto_ip, return_count, &flags, NULL);
|
|
if(*return_ip_list != NULL) {
|
|
close(sock);
|
|
return True;
|
|
}
|
|
}
|
|
|
|
close(sock);
|
|
return False;
|
|
}
|
|
|
|
/********************************************************
|
|
Resolve via "wins" method.
|
|
*********************************************************/
|
|
BOOL resolve_wins(const char *name, int name_type,
|
|
struct in_addr **return_iplist, int *return_count)
|
|
{
|
|
int sock, t, i;
|
|
char **wins_tags;
|
|
struct in_addr src_ip;
|
|
|
|
if (lp_disable_netbios()) {
|
|
DEBUG(5,("resolve_wins(%s#%02x): netbios is disabled\n", name, name_type));
|
|
return False;
|
|
}
|
|
|
|
*return_iplist = NULL;
|
|
*return_count = 0;
|
|
|
|
DEBUG(3,("resolve_wins: Attempting wins lookup for name %s<0x%x>\n", name, name_type));
|
|
|
|
if (wins_srv_count() < 1) {
|
|
DEBUG(3,("resolve_wins: WINS server resolution selected and no WINS servers listed.\n"));
|
|
return False;
|
|
}
|
|
|
|
/* we try a lookup on each of the WINS tags in turn */
|
|
wins_tags = wins_srv_tags();
|
|
|
|
if (!wins_tags) {
|
|
/* huh? no tags?? give up in disgust */
|
|
return False;
|
|
}
|
|
|
|
/* the address we will be sending from */
|
|
src_ip = *interpret_addr2(lp_socket_address());
|
|
|
|
/* in the worst case we will try every wins server with every
|
|
tag! */
|
|
for (t=0; wins_tags && wins_tags[t]; t++) {
|
|
int srv_count = wins_srv_count_tag(wins_tags[t]);
|
|
for (i=0; i<srv_count; i++) {
|
|
struct in_addr wins_ip;
|
|
int flags;
|
|
BOOL timed_out;
|
|
|
|
wins_ip = wins_srv_ip_tag(wins_tags[t], src_ip);
|
|
|
|
if (global_in_nmbd && ismyip(wins_ip)) {
|
|
/* yikes! we'll loop forever */
|
|
continue;
|
|
}
|
|
|
|
/* skip any that have been unresponsive lately */
|
|
if (wins_srv_is_dead(wins_ip, src_ip)) {
|
|
continue;
|
|
}
|
|
|
|
DEBUG(3,("resolve_wins: using WINS server %s and tag '%s'\n", inet_ntoa(wins_ip), wins_tags[t]));
|
|
|
|
sock = open_socket_in(SOCK_DGRAM, 0, 3, src_ip.s_addr, True);
|
|
if (sock == -1) {
|
|
continue;
|
|
}
|
|
|
|
*return_iplist = name_query(sock,name,name_type, False,
|
|
True, wins_ip, return_count, &flags,
|
|
&timed_out);
|
|
if (*return_iplist != NULL) {
|
|
goto success;
|
|
}
|
|
close(sock);
|
|
|
|
if (timed_out) {
|
|
/* Timed out wating for WINS server to respond. Mark it dead. */
|
|
wins_srv_died(wins_ip, src_ip);
|
|
} else {
|
|
/* The name definately isn't in this
|
|
group of WINS servers. goto the next group */
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
wins_srv_tags_free(wins_tags);
|
|
return False;
|
|
|
|
success:
|
|
wins_srv_tags_free(wins_tags);
|
|
close(sock);
|
|
return True;
|
|
}
|
|
|
|
/********************************************************
|
|
Resolve via "lmhosts" method.
|
|
*********************************************************/
|
|
|
|
static BOOL resolve_lmhosts(const char *name, int name_type,
|
|
struct in_addr **return_iplist, int *return_count)
|
|
{
|
|
/*
|
|
* "lmhosts" means parse the local lmhosts file.
|
|
*/
|
|
|
|
XFILE *fp;
|
|
pstring lmhost_name;
|
|
int name_type2;
|
|
struct in_addr return_ip;
|
|
|
|
*return_iplist = NULL;
|
|
*return_count = 0;
|
|
|
|
DEBUG(3,("resolve_lmhosts: Attempting lmhosts lookup for name %s<0x%x>\n", name, name_type));
|
|
|
|
fp = startlmhosts(dyn_LMHOSTSFILE);
|
|
if(fp) {
|
|
while (getlmhostsent(fp, lmhost_name, &name_type2, &return_ip)) {
|
|
if (strequal(name, lmhost_name) &&
|
|
((name_type2 == -1) || (name_type == name_type2))
|
|
) {
|
|
endlmhosts(fp);
|
|
*return_iplist = (struct in_addr *)malloc(sizeof(struct in_addr));
|
|
if(*return_iplist == NULL) {
|
|
DEBUG(3,("resolve_lmhosts: malloc fail !\n"));
|
|
return False;
|
|
}
|
|
**return_iplist = return_ip;
|
|
*return_count = 1;
|
|
return True;
|
|
}
|
|
}
|
|
endlmhosts(fp);
|
|
}
|
|
return False;
|
|
}
|
|
|
|
|
|
/********************************************************
|
|
Resolve via "hosts" method.
|
|
*********************************************************/
|
|
|
|
static BOOL resolve_hosts(const char *name,
|
|
struct in_addr **return_iplist, int *return_count)
|
|
{
|
|
/*
|
|
* "host" means do a localhost, or dns lookup.
|
|
*/
|
|
struct hostent *hp;
|
|
|
|
*return_iplist = NULL;
|
|
*return_count = 0;
|
|
|
|
DEBUG(3,("resolve_hosts: Attempting host lookup for name %s<0x20>\n", name));
|
|
|
|
if (((hp = sys_gethostbyname(name)) != NULL) && (hp->h_addr != NULL)) {
|
|
struct in_addr return_ip;
|
|
putip((char *)&return_ip,(char *)hp->h_addr);
|
|
*return_iplist = (struct in_addr *)malloc(sizeof(struct in_addr));
|
|
if(*return_iplist == NULL) {
|
|
DEBUG(3,("resolve_hosts: malloc fail !\n"));
|
|
return False;
|
|
}
|
|
**return_iplist = return_ip;
|
|
*return_count = 1;
|
|
return True;
|
|
}
|
|
return False;
|
|
}
|
|
|
|
/********************************************************
|
|
Internal interface to resolve a name into an IP address.
|
|
Use this function if the string is either an IP address, DNS
|
|
or host name or NetBIOS name. This uses the name switch in the
|
|
smb.conf to determine the order of name resolution.
|
|
*********************************************************/
|
|
|
|
static BOOL internal_resolve_name(const char *name, int name_type,
|
|
struct in_addr **return_iplist, int *return_count)
|
|
{
|
|
pstring name_resolve_list;
|
|
fstring tok;
|
|
const char *ptr;
|
|
BOOL allones = (strcmp(name,"255.255.255.255") == 0);
|
|
BOOL allzeros = (strcmp(name,"0.0.0.0") == 0);
|
|
BOOL is_address = is_ipaddress(name);
|
|
BOOL result = False;
|
|
struct in_addr *nodupes_iplist;
|
|
int i;
|
|
|
|
*return_iplist = NULL;
|
|
*return_count = 0;
|
|
|
|
DEBUG(10, ("internal_resolve_name: looking up %s#%x\n", name, name_type));
|
|
|
|
if (allzeros || allones || is_address) {
|
|
*return_iplist = (struct in_addr *)malloc(sizeof(struct in_addr));
|
|
if(*return_iplist == NULL) {
|
|
DEBUG(3,("internal_resolve_name: malloc fail !\n"));
|
|
return False;
|
|
}
|
|
if(is_address) {
|
|
/* if it's in the form of an IP address then get the lib to interpret it */
|
|
(*return_iplist)->s_addr = inet_addr(name);
|
|
} else {
|
|
(*return_iplist)->s_addr = allones ? 0xFFFFFFFF : 0;
|
|
*return_count = 1;
|
|
}
|
|
return True;
|
|
}
|
|
|
|
/* Check netbios name cache */
|
|
|
|
if (namecache_fetch(name, name_type, return_iplist, return_count)) {
|
|
|
|
/* This could be a negative response */
|
|
|
|
return (*return_count > 0);
|
|
}
|
|
|
|
pstrcpy(name_resolve_list, lp_name_resolve_order());
|
|
ptr = name_resolve_list;
|
|
if (!ptr || !*ptr)
|
|
ptr = "host";
|
|
|
|
while (next_token(&ptr, tok, LIST_SEP, sizeof(tok))) {
|
|
if((strequal(tok, "host") || strequal(tok, "hosts"))) {
|
|
if (name_type == 0x20) {
|
|
if (resolve_hosts(name, return_iplist, return_count)) {
|
|
result = True;
|
|
goto done;
|
|
} else {
|
|
|
|
/* Store negative lookup result */
|
|
|
|
namecache_store(name, name_type, 0, NULL);
|
|
}
|
|
}
|
|
} else if(strequal( tok, "lmhosts")) {
|
|
if (resolve_lmhosts(name, name_type, return_iplist, return_count)) {
|
|
result = True;
|
|
goto done;
|
|
}
|
|
} else if(strequal( tok, "wins")) {
|
|
/* don't resolve 1D via WINS */
|
|
if (name_type != 0x1D &&
|
|
resolve_wins(name, name_type, return_iplist, return_count)) {
|
|
result = True;
|
|
goto done;
|
|
}
|
|
} else if(strequal( tok, "bcast")) {
|
|
if (name_resolve_bcast(name, name_type, return_iplist, return_count)) {
|
|
result = True;
|
|
goto done;
|
|
}
|
|
} else {
|
|
DEBUG(0,("resolve_name: unknown name switch type %s\n", tok));
|
|
}
|
|
}
|
|
|
|
/* All of the resolve_* functions above have returned false. */
|
|
|
|
SAFE_FREE(*return_iplist);
|
|
*return_count = 0;
|
|
|
|
return False;
|
|
|
|
done:
|
|
|
|
/* Remove duplicate entries. Some queries, notably #1c (domain
|
|
controllers) return the PDC in iplist[0] and then all domain
|
|
controllers including the PDC in iplist[1..n]. Iterating over
|
|
the iplist when the PDC is down will cause two sets of timeouts. */
|
|
|
|
if (*return_count && (nodupes_iplist = (struct in_addr *)
|
|
malloc(sizeof(struct in_addr) * (*return_count)))) {
|
|
int nodupes_count = 0;
|
|
|
|
/* Iterate over return_iplist looking for duplicates */
|
|
|
|
for (i = 0; i < *return_count; i++) {
|
|
BOOL is_dupe = False;
|
|
int j;
|
|
|
|
for (j = i + 1; j < *return_count; j++) {
|
|
if (ip_equal((*return_iplist)[i],
|
|
(*return_iplist)[j])) {
|
|
is_dupe = True;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!is_dupe) {
|
|
|
|
/* This one not a duplicate */
|
|
|
|
nodupes_iplist[nodupes_count] = (*return_iplist)[i];
|
|
nodupes_count++;
|
|
}
|
|
}
|
|
|
|
/* Switcheroo with original list */
|
|
|
|
free(*return_iplist);
|
|
|
|
*return_iplist = nodupes_iplist;
|
|
*return_count = nodupes_count;
|
|
}
|
|
|
|
/* Save in name cache */
|
|
|
|
namecache_store(name, name_type, *return_count, *return_iplist);
|
|
|
|
/* Display some debugging info */
|
|
|
|
DEBUG(10, ("internal_resolve_name: returning %d addresses: ",
|
|
*return_count));
|
|
|
|
for (i = 0; i < *return_count; i++)
|
|
DEBUGADD(10, ("%s ", inet_ntoa((*return_iplist)[i])));
|
|
|
|
DEBUG(10, ("\n"));
|
|
|
|
return result;
|
|
}
|
|
|
|
/********************************************************
|
|
Internal interface to resolve a name into one IP address.
|
|
Use this function if the string is either an IP address, DNS
|
|
or host name or NetBIOS name. This uses the name switch in the
|
|
smb.conf to determine the order of name resolution.
|
|
*********************************************************/
|
|
|
|
BOOL resolve_name(const char *name, struct in_addr *return_ip, int name_type)
|
|
{
|
|
struct in_addr *ip_list = NULL;
|
|
int count = 0;
|
|
|
|
if (is_ipaddress(name)) {
|
|
*return_ip = *interpret_addr2(name);
|
|
return True;
|
|
}
|
|
|
|
if (internal_resolve_name(name, name_type, &ip_list, &count)) {
|
|
int i;
|
|
/* only return valid addresses for TCP connections */
|
|
for (i=0; i<count; i++) {
|
|
char *ip_str = inet_ntoa(ip_list[i]);
|
|
if (ip_str &&
|
|
strcmp(ip_str, "255.255.255.255") != 0 &&
|
|
strcmp(ip_str, "0.0.0.0") != 0) {
|
|
*return_ip = ip_list[i];
|
|
SAFE_FREE(ip_list);
|
|
return True;
|
|
}
|
|
}
|
|
}
|
|
SAFE_FREE(ip_list);
|
|
return False;
|
|
}
|
|
|
|
/********************************************************
|
|
Find the IP address of the master browser or DMB for a workgroup.
|
|
*********************************************************/
|
|
|
|
BOOL find_master_ip(const char *group, struct in_addr *master_ip)
|
|
{
|
|
struct in_addr *ip_list = NULL;
|
|
int count = 0;
|
|
|
|
if (lp_disable_netbios()) {
|
|
DEBUG(5,("find_master_ip(%s): netbios is disabled\n", group));
|
|
return False;
|
|
}
|
|
|
|
if (internal_resolve_name(group, 0x1D, &ip_list, &count)) {
|
|
*master_ip = ip_list[0];
|
|
SAFE_FREE(ip_list);
|
|
return True;
|
|
}
|
|
if(internal_resolve_name(group, 0x1B, &ip_list, &count)) {
|
|
*master_ip = ip_list[0];
|
|
SAFE_FREE(ip_list);
|
|
return True;
|
|
}
|
|
|
|
SAFE_FREE(ip_list);
|
|
return False;
|
|
}
|
|
|
|
/********************************************************
|
|
Lookup a DC name given a Domain name and IP address.
|
|
*********************************************************/
|
|
|
|
BOOL lookup_dc_name(const char *srcname, const char *domain,
|
|
struct in_addr *dc_ip, char *ret_name)
|
|
{
|
|
#if !defined(I_HATE_WINDOWS_REPLY_CODE)
|
|
fstring dc_name;
|
|
BOOL ret;
|
|
|
|
if (lp_disable_netbios()) {
|
|
DEBUG(5,("lookup_dc_name(%s): netbios is disabled\n", domain));
|
|
return False;
|
|
}
|
|
|
|
/*
|
|
* Due to the fact win WinNT *sucks* we must do a node status
|
|
* query here... JRA.
|
|
*/
|
|
|
|
*dc_name = '\0';
|
|
|
|
ret = name_status_find(domain, 0x1c, 0x20, *dc_ip, dc_name);
|
|
|
|
if(ret && *dc_name) {
|
|
fstrcpy(ret_name, dc_name);
|
|
return True;
|
|
}
|
|
|
|
return False;
|
|
|
|
#else /* defined(I_HATE_WINDOWS_REPLY_CODE) */
|
|
|
|
JRA - This code is broken with BDC rollover - we need to do a full
|
|
NT GETDC call, UNICODE, NT domain SID and uncle tom cobbley and all...
|
|
|
|
int retries = 3;
|
|
int retry_time = 2000;
|
|
struct timeval tval;
|
|
struct packet_struct p;
|
|
struct dgram_packet *dgram = &p.packet.dgram;
|
|
char *ptr,*p2;
|
|
char tmp[4];
|
|
int len;
|
|
struct sockaddr_in sock_name;
|
|
int sock_len = sizeof(sock_name);
|
|
const char *mailslot = NET_LOGON_MAILSLOT;
|
|
char *mailslot_name;
|
|
char buffer[1024];
|
|
char *bufp;
|
|
int dgm_id = generate_trn_id();
|
|
int sock = open_socket_in(SOCK_DGRAM, 0, 3, interpret_addr(lp_socket_address()), True );
|
|
|
|
if(sock == -1)
|
|
return False;
|
|
|
|
/* Find out the transient UDP port we have been allocated. */
|
|
if(getsockname(sock, (struct sockaddr *)&sock_name, &sock_len)<0) {
|
|
DEBUG(0,("lookup_pdc_name: Failed to get local UDP port. Error was %s\n",
|
|
strerror(errno)));
|
|
close(sock);
|
|
return False;
|
|
}
|
|
|
|
/*
|
|
* Create the request data.
|
|
*/
|
|
|
|
memset(buffer,'\0',sizeof(buffer));
|
|
bufp = buffer;
|
|
SSVAL(bufp,0,QUERYFORPDC);
|
|
bufp += 2;
|
|
fstrcpy(bufp,srcname);
|
|
bufp += (strlen(bufp) + 1);
|
|
slprintf(bufp, sizeof(fstring)-1, "\\MAILSLOT\\NET\\GETDC%d", dgm_id);
|
|
mailslot_name = bufp;
|
|
bufp += (strlen(bufp) + 1);
|
|
bufp = ALIGN2(bufp, buffer);
|
|
bufp += push_ucs2(NULL, bufp, srcname, sizeof(buffer) - (bufp - buffer), STR_TERMINATE);
|
|
|
|
SIVAL(bufp,0,1);
|
|
SSVAL(bufp,4,0xFFFF);
|
|
SSVAL(bufp,6,0xFFFF);
|
|
bufp += 8;
|
|
len = PTR_DIFF(bufp,buffer);
|
|
|
|
memset((char *)&p,'\0',sizeof(p));
|
|
|
|
/* DIRECT GROUP or UNIQUE datagram. */
|
|
dgram->header.msg_type = 0x10;
|
|
dgram->header.flags.node_type = M_NODE;
|
|
dgram->header.flags.first = True;
|
|
dgram->header.flags.more = False;
|
|
dgram->header.dgm_id = dgm_id;
|
|
dgram->header.source_ip = *iface_ip(*pdc_ip);
|
|
dgram->header.source_port = ntohs(sock_name.sin_port);
|
|
dgram->header.dgm_length = 0; /* Let build_dgram() handle this. */
|
|
dgram->header.packet_offset = 0;
|
|
|
|
make_nmb_name(&dgram->source_name,srcname,0);
|
|
make_nmb_name(&dgram->dest_name,domain,0x1C);
|
|
|
|
ptr = &dgram->data[0];
|
|
|
|
/* Setup the smb part. */
|
|
ptr -= 4; /* XXX Ugliness because of handling of tcp SMB length. */
|
|
memcpy(tmp,ptr,4);
|
|
set_message(ptr,17,17 + len,True);
|
|
memcpy(ptr,tmp,4);
|
|
|
|
CVAL(ptr,smb_com) = SMBtrans;
|
|
SSVAL(ptr,smb_vwv1,len);
|
|
SSVAL(ptr,smb_vwv11,len);
|
|
SSVAL(ptr,smb_vwv12,70 + strlen(mailslot));
|
|
SSVAL(ptr,smb_vwv13,3);
|
|
SSVAL(ptr,smb_vwv14,1);
|
|
SSVAL(ptr,smb_vwv15,1);
|
|
SSVAL(ptr,smb_vwv16,2);
|
|
p2 = smb_buf(ptr);
|
|
pstrcpy(p2,mailslot);
|
|
p2 = skip_string(p2,1);
|
|
|
|
memcpy(p2,buffer,len);
|
|
p2 += len;
|
|
|
|
dgram->datasize = PTR_DIFF(p2,ptr+4); /* +4 for tcp length. */
|
|
|
|
p.ip = *pdc_ip;
|
|
p.port = DGRAM_PORT;
|
|
p.fd = sock;
|
|
p.timestamp = time(NULL);
|
|
p.packet_type = DGRAM_PACKET;
|
|
|
|
GetTimeOfDay(&tval);
|
|
|
|
if (!send_packet(&p)) {
|
|
DEBUG(0,("lookup_pdc_name: send_packet failed.\n"));
|
|
close(sock);
|
|
return False;
|
|
}
|
|
|
|
retries--;
|
|
|
|
while (1) {
|
|
struct timeval tval2;
|
|
struct packet_struct *p_ret;
|
|
|
|
GetTimeOfDay(&tval2);
|
|
if (TvalDiff(&tval,&tval2) > retry_time) {
|
|
if (!retries)
|
|
break;
|
|
if (!send_packet(&p)) {
|
|
DEBUG(0,("lookup_pdc_name: send_packet failed.\n"));
|
|
close(sock);
|
|
return False;
|
|
}
|
|
GetTimeOfDay(&tval);
|
|
retries--;
|
|
}
|
|
|
|
if ((p_ret = receive_dgram_packet(sock,90,mailslot_name))) {
|
|
struct dgram_packet *dgram2 = &p_ret->packet.dgram;
|
|
char *buf;
|
|
char *buf2;
|
|
|
|
buf = &dgram2->data[0];
|
|
buf -= 4;
|
|
|
|
if (CVAL(buf,smb_com) != SMBtrans) {
|
|
DEBUG(0,("lookup_pdc_name: datagram type %u != SMBtrans(%u)\n", (unsigned int)
|
|
CVAL(buf,smb_com), (unsigned int)SMBtrans ));
|
|
free_packet(p_ret);
|
|
continue;
|
|
}
|
|
|
|
len = SVAL(buf,smb_vwv11);
|
|
buf2 = smb_base(buf) + SVAL(buf,smb_vwv12);
|
|
|
|
if (len <= 0) {
|
|
DEBUG(0,("lookup_pdc_name: datagram len < 0 (%d)\n", len ));
|
|
free_packet(p_ret);
|
|
continue;
|
|
}
|
|
|
|
DEBUG(4,("lookup_pdc_name: datagram reply from %s to %s IP %s for %s of type %d len=%d\n",
|
|
nmb_namestr(&dgram2->source_name),nmb_namestr(&dgram2->dest_name),
|
|
inet_ntoa(p_ret->ip), smb_buf(buf),SVAL(buf2,0),len));
|
|
|
|
if(SVAL(buf2,0) != QUERYFORPDC_R) {
|
|
DEBUG(0,("lookup_pdc_name: datagram type (%u) != QUERYFORPDC_R(%u)\n",
|
|
(unsigned int)SVAL(buf,0), (unsigned int)QUERYFORPDC_R ));
|
|
free_packet(p_ret);
|
|
continue;
|
|
}
|
|
|
|
buf2 += 2;
|
|
/* Note this is safe as it is a bounded strcpy. */
|
|
fstrcpy(ret_name, buf2);
|
|
ret_name[sizeof(fstring)-1] = '\0';
|
|
close(sock);
|
|
free_packet(p_ret);
|
|
return True;
|
|
}
|
|
}
|
|
|
|
close(sock);
|
|
return False;
|
|
#endif /* defined(I_HATE_WINDOWS_REPLY_CODE) */
|
|
}
|
|
|
|
/********************************************************
|
|
Get the IP address list of the primary domain controller
|
|
for a domain.
|
|
*********************************************************/
|
|
|
|
BOOL get_pdc_ip(const char *domain, struct in_addr *ip)
|
|
{
|
|
struct in_addr *ip_list;
|
|
int count;
|
|
|
|
/* Look up #1B name */
|
|
|
|
if (!internal_resolve_name(domain, 0x1b, &ip_list, &count))
|
|
return False;
|
|
|
|
SMB_ASSERT(count == 1);
|
|
|
|
*ip = ip_list[0];
|
|
SAFE_FREE(ip_list);
|
|
|
|
return True;
|
|
}
|
|
|
|
/********************************************************
|
|
Get the IP address list of the domain controllers for
|
|
a domain.
|
|
*********************************************************/
|
|
|
|
BOOL get_dc_list(const char *domain, struct in_addr **ip_list, int *count, int *ordered)
|
|
{
|
|
|
|
*ordered = False;
|
|
|
|
/* If it's our domain then use the 'password server' parameter. */
|
|
|
|
if (strequal(domain, lp_workgroup())) {
|
|
char *p;
|
|
char *pserver = lp_passwordserver(); /* UNIX charset. */
|
|
fstring name;
|
|
int num_addresses = 0;
|
|
int local_count, i, j;
|
|
struct in_addr *return_iplist = NULL;
|
|
struct in_addr *auto_ip_list = NULL;
|
|
BOOL done_auto_lookup = False;
|
|
int auto_count = 0;
|
|
|
|
|
|
if (!*pserver)
|
|
return internal_resolve_name(
|
|
domain, 0x1C, ip_list, count);
|
|
|
|
p = pserver;
|
|
|
|
/*
|
|
* if '*' appears in the "password server" list then add
|
|
* an auto lookup to the list of manually configured
|
|
* DC's. If any DC is listed by name, then the list should be
|
|
* considered to be ordered
|
|
*/
|
|
|
|
while (next_token(&p,name,LIST_SEP,sizeof(name))) {
|
|
if (strequal(name, "*")) {
|
|
if ( internal_resolve_name(domain, 0x1C, &auto_ip_list, &auto_count) )
|
|
num_addresses += auto_count;
|
|
done_auto_lookup = True;
|
|
DEBUG(8,("Adding %d DC's from auto lookup\n", auto_count));
|
|
}
|
|
else
|
|
num_addresses++;
|
|
}
|
|
|
|
/* if we have no addresses and haven't done the auto lookup, then
|
|
just return the list of DC's */
|
|
|
|
if ( (num_addresses == 0) && !done_auto_lookup )
|
|
return internal_resolve_name(domain, 0x1C, ip_list, count);
|
|
|
|
return_iplist = (struct in_addr *)malloc(num_addresses * sizeof(struct in_addr));
|
|
|
|
if (return_iplist == NULL) {
|
|
DEBUG(3,("get_dc_list: malloc fail !\n"));
|
|
return False;
|
|
}
|
|
|
|
p = pserver;
|
|
local_count = 0;
|
|
|
|
/* fill in the return list now with real IP's */
|
|
|
|
while ( (local_count<num_addresses) && next_token(&p,name,LIST_SEP,sizeof(name)) ) {
|
|
struct in_addr name_ip;
|
|
|
|
/* copy any addersses from the auto lookup */
|
|
|
|
if ( strequal(name, "*") ) {
|
|
for ( j=0; j<auto_count; j++ )
|
|
return_iplist[local_count++] = auto_ip_list[j];
|
|
continue;
|
|
}
|
|
|
|
/* explicit lookup */
|
|
|
|
if ( resolve_name( name, &name_ip, 0x20) ) {
|
|
return_iplist[local_count++] = name_ip;
|
|
*ordered = True;
|
|
}
|
|
|
|
}
|
|
|
|
/* need to remove duplicates in the list if we have
|
|
any explicit password servers */
|
|
|
|
if ( *ordered ) {
|
|
/* one loop to remove duplicates */
|
|
for ( i=0; i<local_count; i++ ) {
|
|
if ( is_zero_ip(return_iplist[i]) )
|
|
continue;
|
|
|
|
for ( j=i+1; j<local_count; j++ ) {
|
|
if ( ip_equal( return_iplist[i], return_iplist[j]) )
|
|
zero_ip(&return_iplist[j]);
|
|
}
|
|
}
|
|
|
|
/* one loop to clean up any holes we left */
|
|
/* first ip should never be a zero_ip() */
|
|
for (i = 0; i<local_count; ) {
|
|
if ( is_zero_ip(return_iplist[i]) ) {
|
|
if (i != local_count-1 )
|
|
memmove(&return_iplist[i], &return_iplist[i+1],
|
|
(local_count - i - 1)*sizeof(return_iplist[i]));
|
|
local_count--;
|
|
continue;
|
|
}
|
|
i++;
|
|
}
|
|
}
|
|
|
|
*ip_list = return_iplist;
|
|
*count = local_count;
|
|
|
|
DEBUG(8,("get_dc_list: return %d ip addresses\n", *count));
|
|
|
|
return (*count != 0);
|
|
}
|
|
|
|
return internal_resolve_name(domain, 0x1C, ip_list, count);
|
|
}
|
|
|