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-rw-r--r--source/libsmb/namequery.c296
1 files changed, 296 insertions, 0 deletions
diff --git a/source/libsmb/namequery.c b/source/libsmb/namequery.c
new file mode 100644
index 00000000000..f1847e38baa
--- /dev/null
+++ b/source/libsmb/namequery.c
@@ -0,0 +1,296 @@
+/*
+ Unix SMB/Netbios implementation.
+ Version 1.9.
+ name query routines
+ Copyright (C) Andrew Tridgell 1994-1995
+
+ 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"
+
+extern pstring scope;
+extern int DEBUGLEVEL;
+
+
+/****************************************************************************
+interpret a node status response
+****************************************************************************/
+static void _interpret_node_status(char *p, char *master,char *rname)
+{
+ int level = (master||rname)?4:0;
+ int numnames = CVAL(p,0);
+ DEBUG(level,("received %d names\n",numnames));
+
+ if (rname) *rname = 0;
+ if (master) *master = 0;
+
+ p += 1;
+ while (numnames--)
+ {
+ char qname[17];
+ int type;
+ fstring flags;
+ int i;
+ *flags = 0;
+ StrnCpy(qname,p,15);
+ type = CVAL(p,15);
+ p += 16;
+
+ strcat(flags, (p[0] & 0x80) ? "<GROUP> " : " ");
+ if ((p[0] & 0x60) == 0x00) strcat(flags,"B ");
+ if ((p[0] & 0x60) == 0x20) strcat(flags,"P ");
+ if ((p[0] & 0x60) == 0x40) strcat(flags,"M ");
+ if ((p[0] & 0x60) == 0x60) strcat(flags,"H ");
+ if (p[0] & 0x10) strcat(flags,"<DEREGISTERING> ");
+ if (p[0] & 0x08) strcat(flags,"<CONFLICT> ");
+ if (p[0] & 0x04) strcat(flags,"<ACTIVE> ");
+ if (p[0] & 0x02) strcat(flags,"<PERMANENT> ");
+
+ if (master && !*master && type == 0x1d) {
+ StrnCpy(master,qname,15);
+ trim_string(master,NULL," ");
+ }
+
+ if (rname && !*rname && type == 0x20 && !(p[0]&0x80)) {
+ StrnCpy(rname,qname,15);
+ trim_string(rname,NULL," ");
+ }
+
+ for (i = strlen( qname) ; --i >= 0 ; ) {
+ if (!isprint(qname[i])) qname[i] = '.';
+ }
+ DEBUG(level,("\t%-15s <%02x> - %s\n",qname,type,flags));
+ p+=2;
+ }
+ DEBUG(level,("num_good_sends=%d num_good_receives=%d\n",
+ IVAL(p,20),IVAL(p,24)));
+}
+
+
+/****************************************************************************
+ do a netbios name status query on a host
+
+ the "master" parameter is a hack used for finding workgroups.
+ **************************************************************************/
+BOOL name_status(int fd,char *name,int name_type,BOOL recurse,
+ struct in_addr to_ip,char *master,char *rname,
+ void (*fn)())
+{
+ BOOL found=False;
+ int retries = 2;
+ int retry_time = 5000;
+ struct timeval tval;
+ struct packet_struct p;
+ struct packet_struct *p2;
+ struct nmb_packet *nmb = &p.packet.nmb;
+ static int name_trn_id = 0;
+
+ bzero((char *)&p,sizeof(p));
+
+ if (!name_trn_id) name_trn_id = (time(NULL)%(unsigned)0x7FFF) +
+ (getpid()%(unsigned)100);
+ name_trn_id = (name_trn_id+1) % (unsigned)0x7FFF;
+
+ nmb->header.name_trn_id = name_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;
+
+ make_nmb_name(&nmb->question.question_name,name,name_type,scope);
+
+ 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(False);
+
+ retries--;
+
+ while (1)
+ {
+ struct timeval tval2;
+ GetTimeOfDay(&tval2);
+ if (TvalDiff(&tval,&tval2) > retry_time) {
+ if (!retries) break;
+ if (!found && !send_packet(&p))
+ return False;
+ GetTimeOfDay(&tval);
+ retries--;
+ }
+
+ if ((p2=receive_packet(fd,NMB_PACKET,90)))
+ {
+ struct nmb_packet *nmb2 = &p2->packet.nmb;
+ debug_nmb_packet(p2);
+
+ if (nmb->header.name_trn_id != nmb2->header.name_trn_id ||
+ !nmb2->header.response) {
+ /* its not for us - maybe deal with it later */
+ if (fn)
+ fn(p2);
+ else
+ free_packet(p2);
+ continue;
+ }
+
+ 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;
+ }
+
+ _interpret_node_status(&nmb2->answers->rdata[0], master,rname);
+ free_packet(p2);
+ return(True);
+ }
+ }
+
+
+ DEBUG(0,("No status response (this is not unusual)\n"));
+
+ return(False);
+}
+
+
+/****************************************************************************
+ do a netbios name query to find someones IP
+ ****************************************************************************/
+BOOL name_query(int fd,char *name,int name_type,
+ BOOL bcast,BOOL recurse,
+ struct in_addr to_ip, struct in_addr *ip,void (*fn)())
+{
+ BOOL found=False;
+ int 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;
+ static int name_trn_id = 0;
+
+ bzero((char *)&p,sizeof(p));
+
+ if (!name_trn_id) name_trn_id = (time(NULL)%(unsigned)0x7FFF) +
+ (getpid()%(unsigned)100);
+ name_trn_id = (name_trn_id+1) % (unsigned)0x7FFF;
+
+ nmb->header.name_trn_id = name_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 = True;
+ 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,scope);
+
+ 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(False);
+
+ retries--;
+
+ while (1)
+ {
+ struct timeval tval2;
+ GetTimeOfDay(&tval2);
+ if (TvalDiff(&tval,&tval2) > retry_time) {
+ if (!retries) break;
+ if (!found && !send_packet(&p))
+ return False;
+ GetTimeOfDay(&tval);
+ retries--;
+ }
+
+ if ((p2=receive_packet(fd,NMB_PACKET,90)))
+ {
+ struct nmb_packet *nmb2 = &p2->packet.nmb;
+ debug_nmb_packet(p2);
+
+ if (nmb->header.name_trn_id != nmb2->header.name_trn_id ||
+ !nmb2->header.response) {
+ /* its not for us - maybe deal with it later
+ (put it on the queue?) */
+ if (fn)
+ fn(p2);
+ else
+ free_packet(p2);
+ continue;
+ }
+
+ 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;
+ }
+
+ if (ip) {
+ putip((char *)ip,&nmb2->answers->rdata[2]);
+ DEBUG(fn?3:2,("Got a positive name query response from %s",
+ inet_ntoa(p2->ip)));
+ DEBUG(fn?3:2,(" (%s)\n",inet_ntoa(*ip)));
+ }
+ found=True; retries=0;
+ free_packet(p2);
+ if (fn) break;
+ }
+ }
+
+ return(found);
+}
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