--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ name query routines
+ Copyright (C) Andrew Tridgell 1994-1998
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include "includes.h"
+
+/* nmbd.c sets this to True. */
+BOOL global_in_nmbd = False;
+
+/****************************************************************************
+ Generate a random trn_id.
+****************************************************************************/
+
+static int generate_trn_id(void)
+{
+ static int trn_id;
+
+ if (trn_id == 0) {
+ sys_srandom(sys_getpid());
+ }
+
+ trn_id = sys_random();
+
+ return trn_id % (unsigned)0x7FFF;
+}
+
+/****************************************************************************
+ Parse a node status response into an array of structures.
+****************************************************************************/
+
+static NODE_STATUS_STRUCT *parse_node_status(char *p, int *num_names, struct node_status_extra *extra)
+{
+ NODE_STATUS_STRUCT *ret;
+ int i;
+
+ *num_names = CVAL(p,0);
+
+ if (*num_names == 0)
+ return NULL;
+
+ ret = SMB_MALLOC_ARRAY(NODE_STATUS_STRUCT,*num_names);
+ if (!ret)
+ return NULL;
+
+ p++;
+ for (i=0;i< *num_names;i++) {
+ StrnCpy(ret[i].name,p,15);
+ trim_char(ret[i].name,'\0',' ');
+ ret[i].type = CVAL(p,15);
+ ret[i].flags = p[16];
+ p += 18;
+ DEBUG(10, ("%s#%02x: flags = 0x%02x\n", ret[i].name,
+ ret[i].type, ret[i].flags));
+ }
+ /*
+ * Also, pick up the MAC address ...
+ */
+ if (extra) {
+ memcpy(&extra->mac_addr, p, 6); /* Fill in the mac addr */
+ }
+ return ret;
+}
+
+
+/****************************************************************************
+ Do a NBT node status query on an open socket and return an array of
+ structures holding the returned names or NULL if the query failed.
+**************************************************************************/
+
+NODE_STATUS_STRUCT *node_status_query(int fd,struct nmb_name *name,
+ struct in_addr to_ip, int *num_names,
+ struct node_status_extra *extra)
+{
+ BOOL found=False;
+ int retries = 2;
+ int retry_time = 2000;
+ struct timeval tval;
+ struct packet_struct p;
+ struct packet_struct *p2;
+ struct nmb_packet *nmb = &p.packet.nmb;
+ NODE_STATUS_STRUCT *ret;
+
+ ZERO_STRUCT(p);
+
+ nmb->header.name_trn_id = generate_trn_id();
+ nmb->header.opcode = 0;
+ nmb->header.response = False;
+ nmb->header.nm_flags.bcast = False;
+ nmb->header.nm_flags.recursion_available = False;
+ nmb->header.nm_flags.recursion_desired = False;
+ nmb->header.nm_flags.trunc = False;
+ nmb->header.nm_flags.authoritative = False;
+ nmb->header.rcode = 0;
+ nmb->header.qdcount = 1;
+ nmb->header.ancount = 0;
+ nmb->header.nscount = 0;
+ nmb->header.arcount = 0;
+ nmb->question.question_name = *name;
+ nmb->question.question_type = 0x21;
+ nmb->question.question_class = 0x1;
+
+ p.ip = to_ip;
+ p.port = NMB_PORT;
+ p.fd = fd;
+ p.timestamp = time(NULL);
+ p.packet_type = NMB_PACKET;
+
+ GetTimeOfDay(&tval);
+
+ if (!send_packet(&p))
+ return NULL;
+
+ retries--;
+
+ while (1) {
+ struct timeval tval2;
+ GetTimeOfDay(&tval2);
+ if (TvalDiff(&tval,&tval2) > retry_time) {
+ if (!retries)
+ break;
+ if (!found && !send_packet(&p))
+ return NULL;
+ GetTimeOfDay(&tval);
+ retries--;
+ }
+
+ if ((p2=receive_nmb_packet(fd,90,nmb->header.name_trn_id))) {
+ struct nmb_packet *nmb2 = &p2->packet.nmb;
+ debug_nmb_packet(p2);
+
+ if (nmb2->header.opcode != 0 ||
+ nmb2->header.nm_flags.bcast ||
+ nmb2->header.rcode ||
+ !nmb2->header.ancount ||
+ nmb2->answers->rr_type != 0x21) {
+ /* XXXX what do we do with this? could be a
+ redirect, but we'll discard it for the
+ moment */
+ free_packet(p2);
+ continue;
+ }
+
+ ret = parse_node_status(&nmb2->answers->rdata[0], num_names, extra);
+ free_packet(p2);
+ return ret;
+ }
+ }
+
+ return NULL;
+}
+
+/****************************************************************************
+ Find the first type XX name in a node status reply - used for finding
+ a servers name given its IP. Return the matched name in *name.
+**************************************************************************/
+
+BOOL name_status_find(const char *q_name, int q_type, int type, struct in_addr to_ip, fstring name)
+{
+ NODE_STATUS_STRUCT *status = NULL;
+ struct nmb_name nname;
+ int count, i;
+ int sock;
+ BOOL result = False;
+
+ if (lp_disable_netbios()) {
+ DEBUG(5,("name_status_find(%s#%02x): netbios is disabled\n", q_name, q_type));
+ return False;
+ }
+
+ DEBUG(10, ("name_status_find: looking up %s#%02x at %s\n", q_name,
+ q_type, inet_ntoa(to_ip)));
+
+ /* Check the cache first. */
+
+ if (namecache_status_fetch(q_name, q_type, type, to_ip, name))
+ return True;
+
+ sock = open_socket_in(SOCK_DGRAM, 0, 3, interpret_addr(lp_socket_address()), True);
+ if (sock == -1)
+ goto done;
+
+ /* W2K PDC's seem not to respond to '*'#0. JRA */
+ make_nmb_name(&nname, q_name, q_type);
+ status = node_status_query(sock, &nname, to_ip, &count, NULL);
+ close(sock);
+ if (!status)
+ goto done;
+
+ for (i=0;i<count;i++) {
+ if (status[i].type == type)
+ break;
+ }
+ if (i == count)
+ goto done;
+
+ pull_ascii_nstring(name, sizeof(fstring), status[i].name);
+
+ /* Store the result in the cache. */
+ /* but don't store an entry for 0x1c names here. Here we have
+ a single host and DOMAIN<0x1c> names should be a list of hosts */
+
+ if ( q_type != 0x1c )
+ namecache_status_store(q_name, q_type, type, to_ip, name);
+
+ result = True;
+
+ done:
+ SAFE_FREE(status);
+
+ DEBUG(10, ("name_status_find: name %sfound", result ? "" : "not "));
+
+ if (result)
+ DEBUGADD(10, (", name %s ip address is %s", name, inet_ntoa(to_ip)));
+
+ DEBUG(10, ("\n"));
+
+ return result;
+}
+
+/*
+ comparison function used by sort_ip_list
+*/
+
+static int ip_compare(struct in_addr *ip1, struct in_addr *ip2)
+{
+ int max_bits1=0, max_bits2=0;
+ int num_interfaces = iface_count();
+ int i;
+
+ for (i=0;i<num_interfaces;i++) {
+ struct in_addr ip;
+ int bits1, bits2;
+ ip = *iface_n_bcast(i);
+ bits1 = matching_quad_bits((uchar *)&ip1->s_addr, (uchar *)&ip.s_addr);
+ bits2 = matching_quad_bits((uchar *)&ip2->s_addr, (uchar *)&ip.s_addr);
+ max_bits1 = MAX(bits1, max_bits1);
+ max_bits2 = MAX(bits2, max_bits2);
+ }
+
+ /* bias towards directly reachable IPs */
+ if (iface_local(*ip1)) {
+ max_bits1 += 32;
+ }
+ if (iface_local(*ip2)) {
+ max_bits2 += 32;
+ }
+
+ return max_bits2 - max_bits1;
+}
+
+/*******************************************************************
+ compare 2 ldap IPs by nearness to our interfaces - used in qsort
+*******************************************************************/
+
+static int ip_service_compare(struct ip_service *ip1, struct ip_service *ip2)
+{
+ int result;
+
+ if ( (result = ip_compare(&ip1->ip, &ip2->ip)) != 0 )
+ return result;
+
+ if ( ip1->port > ip2->port )
+ return 1;
+
+ if ( ip1->port < ip2->port )
+ return -1;
+
+ return 0;
+}
+
+/*
+ sort an IP list so that names that are close to one of our interfaces
+ are at the top. This prevents the problem where a WINS server returns an IP that
+ is not reachable from our subnet as the first match
+*/
+
+static void sort_ip_list(struct in_addr *iplist, int count)
+{
+ if (count <= 1) {
+ return;
+ }
+
+ qsort(iplist, count, sizeof(struct in_addr), QSORT_CAST ip_compare);
+}
+
+static void sort_ip_list2(struct ip_service *iplist, int count)
+{
+ if (count <= 1) {
+ return;
+ }
+
+ qsort(iplist, count, sizeof(struct ip_service), QSORT_CAST ip_service_compare);
+}
+
+/**********************************************************************
+ Remove any duplicate address/port pairs in the list
+ *********************************************************************/
+
+static int remove_duplicate_addrs2( struct ip_service *iplist, int count )
+{
+ int i, j;
+
+ DEBUG(10,("remove_duplicate_addrs2: looking for duplicate address/port pairs\n"));
+
+ /* one loop to remove duplicates */
+ for ( i=0; i<count; i++ ) {
+ if ( is_zero_ip(iplist[i].ip) )
+ continue;
+
+ for ( j=i+1; j<count; j++ ) {
+ if ( ip_service_equal(iplist[i], iplist[j]) )
+ zero_ip(&iplist[j].ip);
+ }
+ }
+
+ /* one loop to clean up any holes we left */
+ /* first ip should never be a zero_ip() */
+ for (i = 0; i<count; ) {
+ if ( is_zero_ip(iplist[i].ip) ) {
+ if (i != count-1 )
+ memmove(&iplist[i], &iplist[i+1], (count - i - 1)*sizeof(iplist[i]));
+ count--;
+ continue;
+ }
+ i++;
+ }
+
+ return count;
+}
+
+/****************************************************************************
+ Do a netbios name query to find someones IP.
+ Returns an array of IP addresses or NULL if none.
+ *count will be set to the number of addresses returned.
+ *timed_out is set if we failed by timing out
+****************************************************************************/
+
+struct in_addr *name_query(int fd,const char *name,int name_type,
+ BOOL bcast,BOOL recurse,
+ struct in_addr to_ip, int *count, int *flags,
+ BOOL *timed_out)
+{
+ BOOL found=False;
+ int i, retries = 3;
+ int retry_time = bcast?250:2000;
+ struct timeval tval;
+ struct packet_struct p;
+ struct packet_struct *p2;
+ struct nmb_packet *nmb = &p.packet.nmb;
+ struct in_addr *ip_list = NULL;
+
+ if (lp_disable_netbios()) {
+ DEBUG(5,("name_query(%s#%02x): netbios is disabled\n", name, name_type));
+ return NULL;
+ }
+
+ if (timed_out) {
+ *timed_out = False;
+ }
+
+ memset((char *)&p,'\0',sizeof(p));
+ (*count) = 0;
+ (*flags) = 0;
+
+ nmb->header.name_trn_id = generate_trn_id();
+ nmb->header.opcode = 0;
+ nmb->header.response = False;
+ nmb->header.nm_flags.bcast = bcast;
+ nmb->header.nm_flags.recursion_available = False;
+ nmb->header.nm_flags.recursion_desired = recurse;
+ nmb->header.nm_flags.trunc = False;
+ nmb->header.nm_flags.authoritative = False;
+ nmb->header.rcode = 0;
+ nmb->header.qdcount = 1;
+ nmb->header.ancount = 0;
+ nmb->header.nscount = 0;
+ nmb->header.arcount = 0;
+
+ make_nmb_name(&nmb->question.question_name,name,name_type);
+
+ nmb->question.question_type = 0x20;
+ nmb->question.question_class = 0x1;
+
+ p.ip = to_ip;
+ p.port = NMB_PORT;
+ p.fd = fd;
+ p.timestamp = time(NULL);
+ p.packet_type = NMB_PACKET;
+
+ GetTimeOfDay(&tval);
+
+ if (!send_packet(&p))
+ return NULL;
+
+ retries--;
+
+ while (1) {
+ struct timeval tval2;
+ struct in_addr *tmp_ip_list;
+
+ GetTimeOfDay(&tval2);
+ if (TvalDiff(&tval,&tval2) > retry_time) {
+ if (!retries)
+ break;
+ if (!found && !send_packet(&p))
+ return NULL;
+ GetTimeOfDay(&tval);
+ retries--;
+ }
+
+ if ((p2=receive_nmb_packet(fd,90,nmb->header.name_trn_id))) {
+ struct nmb_packet *nmb2 = &p2->packet.nmb;
+ debug_nmb_packet(p2);
+
+ /* If we get a Negative Name Query Response from a WINS
+ * server, we should report it and give up.
+ */
+ if( 0 == nmb2->header.opcode /* A query response */
+ && !(bcast) /* from a WINS server */
+ && nmb2->header.rcode /* Error returned */
+ ) {
+
+ if( DEBUGLVL( 3 ) ) {
+ /* Only executed if DEBUGLEVEL >= 3 */
+ dbgtext( "Negative name query response, rcode 0x%02x: ", nmb2->header.rcode );
+ switch( nmb2->header.rcode ) {
+ case 0x01:
+ dbgtext( "Request was invalidly formatted.\n" );
+ break;
+ case 0x02:
+ dbgtext( "Problem with NBNS, cannot process name.\n");
+ break;
+ case 0x03:
+ dbgtext( "The name requested does not exist.\n" );
+ break;
+ case 0x04:
+ dbgtext( "Unsupported request error.\n" );
+ break;
+ case 0x05:
+ dbgtext( "Query refused error.\n" );
+ break;
+ default:
+ dbgtext( "Unrecognized error code.\n" );
+ break;
+ }
+ }
+ free_packet(p2);
+ return( NULL );
+ }
+
+ if (nmb2->header.opcode != 0 ||
+ nmb2->header.nm_flags.bcast ||
+ nmb2->header.rcode ||
+ !nmb2->header.ancount) {
+ /*
+ * XXXX what do we do with this? Could be a
+ * redirect, but we'll discard it for the
+ * moment.
+ */
+ free_packet(p2);
+ continue;
+ }
+
+ tmp_ip_list = SMB_REALLOC_ARRAY( ip_list, struct in_addr,
+ (*count) + nmb2->answers->rdlength/6 );
+
+ if (!tmp_ip_list) {
+ DEBUG(0,("name_query: Realloc failed.\n"));
+ SAFE_FREE(ip_list);
+ }
+
+ ip_list = tmp_ip_list;
+
+ if (ip_list) {
+ DEBUG(2,("Got a positive name query response from %s ( ", inet_ntoa(p2->ip)));
+ for (i=0;i<nmb2->answers->rdlength/6;i++) {
+ putip((char *)&ip_list[(*count)],&nmb2->answers->rdata[2+i*6]);
+ DEBUGADD(2,("%s ",inet_ntoa(ip_list[(*count)])));
+ (*count)++;
+ }
+ DEBUGADD(2,(")\n"));
+ }
+
+ found=True;
+ retries=0;
+ /* We add the flags back ... */
+ if (nmb2->header.response)
+ (*flags) |= NM_FLAGS_RS;
+ if (nmb2->header.nm_flags.authoritative)
+ (*flags) |= NM_FLAGS_AA;
+ if (nmb2->header.nm_flags.trunc)
+ (*flags) |= NM_FLAGS_TC;
+ if (nmb2->header.nm_flags.recursion_desired)
+ (*flags) |= NM_FLAGS_RD;
+ if (nmb2->header.nm_flags.recursion_available)
+ (*flags) |= NM_FLAGS_RA;
+ if (nmb2->header.nm_flags.bcast)
+ (*flags) |= NM_FLAGS_B;
+ free_packet(p2);
+ /*
+ * If we're doing a unicast lookup we only
+ * expect one reply. Don't wait the full 2
+ * seconds if we got one. JRA.
+ */
+ if(!bcast && found)
+ break;
+ }
+ }
+
+ /* only set timed_out if we didn't fund what we where looking for*/
+
+ if ( !found && timed_out ) {
+ *timed_out = True;
+ }
+
+ /* sort the ip list so we choose close servers first if possible */
+ sort_ip_list(ip_list, *count);
+
+ return ip_list;
+}
+
+/********************************************************
+ Start parsing the lmhosts file.
+*********************************************************/
+
+XFILE *startlmhosts(char *fname)
+{
+ XFILE *fp = x_fopen(fname,O_RDONLY, 0);
+ if (!fp) {
+ DEBUG(4,("startlmhosts: Can't open lmhosts file %s. Error was %s\n",
+ fname, strerror(errno)));
+ return NULL;
+ }
+ 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;
+
+ *name_type = -1;
+
+ if (!fgets_slash(line,sizeof(pstring),fp)) {
+ 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);
+}
+
+/********************************************************
+ convert an array if struct in_addrs to struct ip_service
+ return False on failure. Port is set to PORT_NONE;
+*********************************************************/
+
+static BOOL convert_ip2service( struct ip_service **return_iplist, struct in_addr *ip_list, int count )
+{
+ int i;
+
+ if ( count==0 || !ip_list )
+ return False;
+
+ /* copy the ip address; port will be PORT_NONE */
+ if ( (*return_iplist = SMB_MALLOC_ARRAY(struct ip_service, count)) == NULL ) {
+ DEBUG(0,("convert_ip2service: malloc failed for %d enetries!\n", count ));
+ return False;
+ }
+
+ for ( i=0; i<count; i++ ) {
+ (*return_iplist)[i].ip = ip_list[i];
+ (*return_iplist)[i].port = PORT_NONE;
+ }
+
+ return True;
+}
+/********************************************************
+ Resolve via "bcast" method.
+*********************************************************/
+
+BOOL name_resolve_bcast(const char *name, int name_type,
+ struct ip_service **return_iplist, int *return_count)
+{
+ int sock, i;
+ int num_interfaces = iface_count();
+ struct in_addr *ip_list;
+ BOOL ret;
+
+ if (lp_disable_netbios()) {
+ DEBUG(5,("name_resolve_bcast(%s#%02x): netbios is disabled\n", name, name_type));
+ return False;
+ }
+
+ *return_iplist = 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);
+ ip_list = name_query(sock, name, name_type, True,
+ True, sendto_ip, return_count, &flags, NULL);
+ if( ip_list )
+ goto success;
+ }
+
+ /* failed - no response */
+
+ close(sock);
+ return False;
+
+success:
+ ret = True;
+ if ( !convert_ip2service(return_iplist, ip_list, *return_count) )
+ ret = False;
+
+ SAFE_FREE( ip_list );
+ close(sock);
+ return ret;
+}
+
+/********************************************************
+ Resolve via "wins" method.
+*********************************************************/
+
+BOOL resolve_wins(const char *name, int name_type,
+ struct ip_service **return_iplist, int *return_count)
+{
+ int sock, t, i;
+ char **wins_tags;
+ struct in_addr src_ip, *ip_list = NULL;
+ BOOL ret;
+
+ 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;
+ }
+
+ ip_list = name_query(sock,name,name_type, False,
+ True, wins_ip, return_count, &flags,
+ &timed_out);
+
+ /* exit loop if we got a list of addresses */
+
+ if ( ip_list )
+ 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:
+ ret = True;
+ if ( !convert_ip2service( return_iplist, ip_list, *return_count ) )
+ ret = False;
+
+ SAFE_FREE( ip_list );
+ wins_srv_tags_free(wins_tags);
+ close(sock);
+
+ return ret;
+}
+
+/********************************************************
+ Resolve via "lmhosts" method.
+*********************************************************/
+
+static BOOL resolve_lmhosts(const char *name, int name_type,
+ struct ip_service **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;
+ BOOL result = False;
+
+ *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 == NULL )
+ return False;
+
+ while (getlmhostsent(fp, lmhost_name, &name_type2, &return_ip))
+ {
+
+ if (!strequal(name, lmhost_name))
+ continue;
+
+ if ((name_type2 != -1) && (name_type != name_type2))
+ continue;
+
+ *return_iplist = SMB_REALLOC_ARRAY((*return_iplist), struct ip_service,
+ (*return_count)+1);
+
+ if ((*return_iplist) == NULL) {
+ DEBUG(3,("resolve_lmhosts: malloc fail !\n"));
+ return False;
+ }
+
+ (*return_iplist)[*return_count].ip = return_ip;
+ (*return_iplist)[*return_count].port = PORT_NONE;
+ *return_count += 1;
+
+ /* we found something */
+ result = True;
+
+ /* Multiple names only for DC lookup */
+ if (name_type != 0x1c)
+ break;
+ }
+
+ endlmhosts(fp);
+
+ return result;
+}
+
+
+/********************************************************
+ Resolve via "hosts" method.
+*********************************************************/
+
+static BOOL resolve_hosts(const char *name, int name_type,
+ struct ip_service **return_iplist, int *return_count)
+{
+ /*
+ * "host" means do a localhost, or dns lookup.
+ */
+ struct hostent *hp;
+
+ if ( name_type != 0x20 && name_type != 0x0) {
+ DEBUG(5, ("resolve_hosts: not appropriate for name type <0x%x>\n", name_type));
+ return False;
+ }
+
+ *return_iplist = NULL;
+ *return_count = 0;
+
+ DEBUG(3,("resolve_hosts: Attempting host lookup for name %s<0x%x>\n", name, name_type));
+
+ 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 = SMB_MALLOC_P(struct ip_service);
+ if(*return_iplist == NULL) {
+ DEBUG(3,("resolve_hosts: malloc fail !\n"));
+ return False;
+ }
+ (*return_iplist)->ip = return_ip;
+ (*return_iplist)->port = PORT_NONE;
+ *return_count = 1;
+ return True;
+ }
+ return False;
+}
+
+/********************************************************
+ Resolve via "ADS" method.
+*********************************************************/
+
+static BOOL resolve_ads(const char *name, int name_type,
+ struct ip_service **return_iplist, int *return_count)
+{
+
+#ifdef HAVE_ADS
+ if ( name_type == 0x1c ) {
+ int count, i = 0;
+ char *list = NULL;
+ const char *ptr;
+ pstring tok;
+
+ /* try to lookup the _ldap._tcp.<domain> if we are using ADS */
+ if ( lp_security() != SEC_ADS )
+ return False;
+
+ DEBUG(5,("resolve_hosts: Attempting to resolve DC's for %s using DNS\n",
+ name));
+
+ if (ldap_domain2hostlist(name, &list) != LDAP_SUCCESS)
+ return False;
+
+ count = count_chars(list, ' ') + 1;
+ if ( (*return_iplist = SMB_MALLOC_ARRAY(struct ip_service, count)) == NULL ) {
+ DEBUG(0,("resolve_hosts: malloc failed for %d entries\n", count ));
+ return False;
+ }
+
+ ptr = list;
+ while (next_token(&ptr, tok, " ", sizeof(tok))) {
+ unsigned port = LDAP_PORT;
+ char *p = strchr(tok, ':');
+ if (p) {
+ *p = 0;
+ port = atoi(p+1);
+ }
+ (*return_iplist)[i].ip = *interpret_addr2(tok);
+ (*return_iplist)[i].port = port;
+
+ /* make sure it is a valid IP. I considered checking the negative
+ connection cache, but this is the wrong place for it. Maybe only
+ as a hac. After think about it, if all of the IP addresses retuend
+ from DNS are dead, what hope does a netbios name lookup have?
+ The standard reason for falling back to netbios lookups is that
+ our DNS server doesn't know anything about the DC's -- jerry */
+
+ if ( is_zero_ip((*return_iplist)[i].ip) )
+ continue;
+
+ i++;
+ }
+ SAFE_FREE(list);
+
+ *return_count = i;
+
+ return True;
+ } else
+#endif /* HAVE_ADS */
+ {
+ 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.
+
+ Added support for ip addr/port to support ADS ldap servers.
+ the only place we currently care about the port is in the
+ resolve_hosts() when looking up DC's via SRV RR entries in DNS
+**********************************************************************/
+
+BOOL internal_resolve_name(const char *name, int name_type,
+ struct ip_service **return_iplist,
+ int *return_count, const char *resolve_order)
+{
+ 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;
+ 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) {
+
+ if ( (*return_iplist = SMB_MALLOC_P(struct ip_service)) == NULL ) {
+ DEBUG(0,("internal_resolve_name: malloc fail !\n"));
+ return False;
+ }
+
+ if(is_address) {
+ /* ignore the port here */
+ (*return_iplist)->port = PORT_NONE;
+
+ /* if it's in the form of an IP address then get the lib to interpret it */
+ if (((*return_iplist)->ip.s_addr = inet_addr(name)) == 0xFFFFFFFF ){
+ DEBUG(1,("internal_resolve_name: inet_addr failed on %s\n", name));
+ return False;
+ }
+ } else {
+ (*return_iplist)->ip.s_addr = allones ? 0xFFFFFFFF : 0;
+ }
+ *return_count = 1;
+ return True;
+ }
+
+ /* Check name cache */
+
+ if (namecache_fetch(name, name_type, return_iplist, return_count)) {
+ /* This could be a negative response */
+ return (*return_count > 0);
+ }
+
+ /* set the name resolution order */
+
+ if ( strcmp( resolve_order, "NULL") == 0 ) {
+ DEBUG(8,("internal_resolve_name: all lookups disabled\n"));
+ return False;
+ }
+
+ if ( !resolve_order ) {
+ pstrcpy(name_resolve_list, lp_name_resolve_order());
+ } else {
+ pstrcpy(name_resolve_list, resolve_order);
+
+ if ( !name_resolve_list[0] ) {
+ ptr = "host";
+ } else {
+ ptr = name_resolve_list;
+ }
+
+ /* iterate through the name resolution backends */
+
+ while (next_token(&ptr, tok, LIST_SEP, sizeof(tok))) {
+ if((strequal(tok, "host") || strequal(tok, "hosts"))) {
+ if (resolve_hosts(name, name_type, return_iplist, return_count)) {
+ result = True;
+ goto done;
+ }
+ } else if(strequal( tok, "ads")) {
+ /* deal with 0x1c names here. This will result in a
+ SRV record lookup for _ldap._tcp.<domain> if we
+ are using 'security = ads' */
+ if (resolve_ads(name, name_type, return_iplist, return_count)) {
+ result = True;
+ goto done;
+ }
+ } 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 ) {
+ *return_count = remove_duplicate_addrs2( *return_iplist, *return_count );
+ }
+
+ /* Save in name cache */
+ if ( DEBUGLEVEL >= 100 ) {
+ for (i = 0; i < *return_count && DEBUGLEVEL == 100; i++)
+ DEBUG(100, ("Storing name %s of type %d (%s:%d)\n", name,
+ name_type, inet_ntoa((*return_iplist)[i].ip), (*return_iplist)[i].port));
+ }
+
+ namecache_store(name, name_type, *return_count, *return_iplist);
+
+ /* Display some debugging info */
+
+ if ( DEBUGLEVEL >= 10 ) {
+ DEBUG(10, ("internal_resolve_name: returning %d addresses: ", *return_count));
+
+ for (i = 0; i < *return_count; i++) {
+ DEBUGADD(10, ("%s:%d ", inet_ntoa((*return_iplist)[i].ip), (*return_iplist)[i].port));
+ }
+ 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 ip_service *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, lp_name_resolve_order())) {
+ int i;
+
+ /* only return valid addresses for TCP connections */
+ for (i=0; i<count; i++) {
+ char *ip_str = inet_ntoa(ip_list[i].ip);
+ if (ip_str &&
+ strcmp(ip_str, "255.255.255.255") != 0 &&
+ strcmp(ip_str, "0.0.0.0") != 0)
+ {
+ *return_ip = ip_list[i].ip;
+ 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 ip_service *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, lp_name_resolve_order())) {
+ *master_ip = ip_list[0].ip;
+ SAFE_FREE(ip_list);
+ return True;
+ }
+ if(internal_resolve_name(group, 0x1B, &ip_list, &count, lp_name_resolve_order())) {
+ *master_ip = ip_list[0].ip;
+ SAFE_FREE(ip_list);
+ return True;
+ }
+
+ SAFE_FREE(ip_list);
+ return False;
+}
+
+/********************************************************
+ 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 ip_service *ip_list;
+ int count;
+
+ /* Look up #1B name */
+
+ if (!internal_resolve_name(domain, 0x1b, &ip_list, &count, lp_name_resolve_order())) {
+ return False;
+ }
+
+ /* if we get more than 1 IP back we have to assume it is a
+ multi-homed PDC and not a mess up */
+
+ if ( count > 1 ) {
+ DEBUG(6,("get_pdc_ip: PDC has %d IP addresses!\n", count));
+ sort_ip_list2( ip_list, count );
+ }
+
+ *ip = ip_list[0].ip;
+
+ SAFE_FREE(ip_list);
+
+ return True;
+}
+
+/********************************************************
+ Get the IP address list of the domain controllers for
+ a domain.
+*********************************************************/
+
+static BOOL get_dc_list(const char *domain, struct ip_service **ip_list,
+ int *count, BOOL ads_only, int *ordered)
+{
+ fstring resolve_order;
+
+ /* if we are restricted to solely using DNS for looking
+ up a domain controller, make sure that host lookups
+ are enabled for the 'name resolve order'. If host lookups
+ are disabled and ads_only is True, then set the string to
+ NULL. */
+
+ fstrcpy( resolve_order, lp_name_resolve_order() );
+ strlower_m( resolve_order );
+ if ( ads_only ) {
+ if ( strstr( resolve_order, "host" ) )
+ fstrcpy( resolve_order, "ads" );
+ else
+ fstrcpy( resolve_order, "NULL" );
+ }
+
+
+ *ordered = False;
+
+ /* If it's our domain then use the 'password server' parameter. */
+
+ if ( strequal(domain, lp_workgroup()) || strequal(domain, lp_realm()) ) {
+ const char *p;
+ char *pserver = lp_passwordserver(); /* UNIX charset. */
+ char *port_str;
+ int port;
+ fstring name;
+ int num_addresses = 0;
+ int local_count, i, j;
+ struct ip_service *return_iplist = NULL;
+ struct ip_service *auto_ip_list = NULL;
+ BOOL done_auto_lookup = False;
+ int auto_count = 0;
+
+
+ if (!*pserver)
+ return internal_resolve_name(domain, 0x1C, ip_list, count, resolve_order);
+
+ 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, resolve_order) )
+ 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, resolve_order);
+ }
+
+ /* maybe we just failed? */
+
+ if ( num_addresses == 0 ) {
+ DEBUG(4,("get_dc_list: no servers found\n"));
+ return False;
+ }
+
+ if ( (return_iplist = SMB_MALLOC_ARRAY(struct ip_service, num_addresses)) == 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++ ) {
+ /* Check for and don't copy any known bad DC IP's. */
+ if(!NT_STATUS_IS_OK(check_negative_conn_cache(domain,
+ inet_ntoa(auto_ip_list[j].ip)))) {
+ DEBUG(5,("get_dc_list: negative entry %s removed from DC list\n",
+ inet_ntoa(auto_ip_list[j].ip) ));
+ continue;
+ }
+ return_iplist[local_count].ip = auto_ip_list[j].ip;
+ return_iplist[local_count].port = auto_ip_list[j].port;
+ local_count++;
+ }
+ continue;
+ }
+
+
+ /* added support for address:port syntax for ads (not that I think
+ anyone will ever run the LDAP server in an AD domain on something
+ other than port 389 */
+
+ port = (lp_security() == SEC_ADS) ? LDAP_PORT : PORT_NONE;
+ if ( (port_str=strchr(name, ':')) != NULL ) {
+ *port_str = '\0';
+ port_str++;
+ port = atoi( port_str );
+ }
+
+ /* explicit lookup; resolve_name() will handle names & IP addresses */
+ if ( resolve_name( name, &name_ip, 0x20 ) ) {
+
+ /* Check for and don't copy any known bad DC IP's. */
+ if( !NT_STATUS_IS_OK(check_negative_conn_cache(domain, inet_ntoa(name_ip))) ) {
+ DEBUG(5,("get_dc_list: negative entry %s removed from DC list\n",name ));
+ continue;
+ }
+
+ return_iplist[local_count].ip = name_ip;
+ return_iplist[local_count].port = port;
+ local_count++;
+ *ordered = True;
+ }
+ }
+
+ SAFE_FREE(auto_ip_list);
+
+ /* need to remove duplicates in the list if we have any
+ explicit password servers */
+
+ if ( local_count ) {
+ local_count = remove_duplicate_addrs2( return_iplist, local_count );
+ }
+
+ if ( DEBUGLEVEL >= 4 ) {
+ DEBUG(4,("get_dc_list: returning %d ip addresses in an %sordered list\n", local_count,
+ *ordered ? "":"un"));
+ DEBUG(4,("get_dc_list: "));
+ for ( i=0; i<local_count; i++ )
+ DEBUGADD(4,("%s:%d ", inet_ntoa(return_iplist[i].ip), return_iplist[i].port ));
+ DEBUGADD(4,("\n"));
+ }
+
+ *ip_list = return_iplist;
+ *count = local_count;
+
+ return (*count != 0);
+ }
+
+ DEBUG(10,("get_dc_list: defaulting to internal auto lookup for domain %s\n", domain));
+
+ return internal_resolve_name(domain, 0x1C, ip_list, count, resolve_order);
+}
+
+/*********************************************************************
+ Small wrapper function to get the DC list and sort it if neccessary.
+*********************************************************************/
+
+BOOL get_sorted_dc_list( const char *domain, struct ip_service **ip_list, int *count, BOOL ads_only )
+{
+ BOOL ordered;
+
+ DEBUG(8,("get_sorted_dc_list: attempting lookup using [%s]\n",
+ (ads_only ? "ads" : lp_name_resolve_order())));
+
+ if ( !get_dc_list(domain, ip_list, count, ads_only, &ordered) ) {
+ return False;
+ }
+
+ /* only sort if we don't already have an ordered list */
+ if ( !ordered ) {
+ sort_ip_list2( *ip_list, *count );
+ }
+
+ return True;
+}
projects / samba / blobdiff