Unix SMB/Netbios implementation.
Version 1.9.
name query routines
- Copyright (C) Andrew Tridgell 1994-1995
+ 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
#include "includes.h"
-extern pstring scope;
extern int DEBUGLEVEL;
+/* nmbd.c sets this to True. */
+BOOL global_in_nmbd = False;
/****************************************************************************
-interpret a node status response
+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;
+}
+
+
+/****************************************************************************
+ 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));
+ DEBUG(1,("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," ");
- }
+ while (numnames--) {
+ char qname[17];
+ int type;
+ fstring flags;
+ int i;
+ *flags = 0;
+ StrnCpy(qname,p,15);
+ type = CVAL(p,15);
+ p += 16;
+
+ fstrcat(flags, (p[0] & 0x80) ? "<GROUP> " : " ");
+ if ((p[0] & 0x60) == 0x00) fstrcat(flags,"B ");
+ if ((p[0] & 0x60) == 0x20) fstrcat(flags,"P ");
+ if ((p[0] & 0x60) == 0x40) fstrcat(flags,"M ");
+ if ((p[0] & 0x60) == 0x60) fstrcat(flags,"H ");
+ if (p[0] & 0x10) fstrcat(flags,"<DEREGISTERING> ");
+ if (p[0] & 0x08) fstrcat(flags,"<CONFLICT> ");
+ if (p[0] & 0x04) fstrcat(flags,"<ACTIVE> ");
+ if (p[0] & 0x02) fstrcat(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," ");
- }
+ 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;
+ for (i = strlen( qname) ; --i >= 0 ; ) {
+ if (!isprint((int)qname[i])) qname[i] = '.';
}
- DEBUG(level,("num_good_sends=%d num_good_receives=%d\n",
+ DEBUG(1,("\t%-15s <%02x> - %s\n",qname,type,flags));
+ p+=2;
+ }
+
+ DEBUG(1,("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)())
+ Internal function handling a netbios name status query on a host.
+**************************************************************************/
+static BOOL internal_name_status(int fd,char *name,int name_type,BOOL recurse,
+ struct in_addr to_ip,char *master,
+ char *rname, BOOL verbose,
+ void (*fn_interpret_node_status)(char *, char *,char *))
{
BOOL found=False;
int retries = 2;
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;
+ memset((char *)&p,'\0',sizeof(p));
- nmb->header.name_trn_id = name_trn_id;
+ nmb->header.name_trn_id = generate_trn_id();
nmb->header.opcode = 0;
nmb->header.response = False;
nmb->header.nm_flags.bcast = False;
nmb->header.nscount = 0;
nmb->header.arcount = 0;
- make_nmb_name(&nmb->question.question_name,name,name_type,scope);
+ make_nmb_name(&nmb->question.question_name,name,name_type);
nmb->question.question_type = 0x21;
nmb->question.question_class = 0x1;
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;
+ 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--;
}
- _interpret_node_status(&nmb2->answers->rdata[0], master,rname);
- free_packet(p2);
- return(True);
- }
- }
-
+ 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;
+ }
+
+ if(fn_interpret_node_status)
+ (*fn_interpret_node_status)(&nmb2->answers->rdata[0],master,rname);
+ free_packet(p2);
+ return(True);
+ }
+ }
- DEBUG(0,("No status response (this is not unusual)\n"));
+ if(verbose)
+ DEBUG(0,("No status response (this is not unusual)\n"));
return(False);
}
+/****************************************************************************
+ 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)
+{
+ return internal_name_status(fd,name,name_type,recurse,
+ to_ip,master,rname,True,
+ _interpret_node_status);
+}
/****************************************************************************
- 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)())
+ 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.
+****************************************************************************/
+
+struct in_addr *name_query(int fd,const char *name,int name_type,
+ BOOL bcast,BOOL recurse,
+ struct in_addr to_ip, int *count)
{
BOOL found=False;
- int retries = 3;
+ 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;
- static int name_trn_id = 0;
+ struct in_addr *ip_list = NULL;
- bzero((char *)&p,sizeof(p));
+ memset((char *)&p,'\0',sizeof(p));
+ (*count) = 0;
- 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.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 = 0;
- nmb->header.nm_flags.recursion_desired = 1;
+ 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.nscount = 0;
nmb->header.arcount = 0;
- make_nmb_name(&nmb->question.question_name,name,name_type,scope);
+ make_nmb_name(&nmb->question.question_name,name,name_type);
nmb->question.question_type = 0x20;
nmb->question.question_class = 0x1;
GetTimeOfDay(&tval);
if (!send_packet(&p))
- return(False);
+ 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 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;
+ {
+ 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 (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 ((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( "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;
+ }
+
+ ip_list = (struct in_addr *)Realloc( ip_list,
+ sizeof( ip_list[0] )
+ * ( (*count) + nmb2->answers->rdlength/6 ) );
+ 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;
+ 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;
}
+ }
+
+ return ip_list;
+}
+
+/********************************************************
+ Start parsing the lmhosts file.
+*********************************************************/
+
+FILE *startlmhosts(char *fname)
+{
+ FILE *fp = sys_fopen(fname,"r");
+ 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( FILE *fp, pstring name, int *name_type, struct in_addr *ipaddr)
+{
+ pstring line;
+
+ while(!feof(fp) && !ferror(fp)) {
+ pstring ip,flags,extra;
+ char *ptr;
+ int count = 0;
+
+ *name_type = -1;
+
+ if (!fgets_slash(line,sizeof(pstring),fp))
+ 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)));
+ 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(flags,'G') || strchr(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((ptr = strchr(name, '#')) != NULL)
+ {
+ char *endptr;
+
+ ptr++;
+ *name_type = (int)strtol(ptr, &endptr, 16);
+
+ if(!*ptr || (endptr == ptr))
+ {
+ DEBUG(0,("getlmhostsent: invalid name %s containing '#'.\n", name));
+ continue;
+ }
+
+ *(--ptr) = '\0'; /* Truncate at the '#' */
+ }
+
+ return True;
+ }
+
+ return False;
+}
+
+/********************************************************
+ Finish parsing the lmhosts file.
+*********************************************************/
+
+void endlmhosts(FILE *fp)
+{
+ fclose(fp);
+}
+
+/********************************************************
+ Resolve via "bcast" method.
+*********************************************************/
+
+static BOOL 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();
+
+ *return_ip_list = NULL;
+ *return_count = 0;
+
+ /*
+ * "bcast" means do a broadcast lookup on all the local interfaces.
+ */
+
+ DEBUG(3,("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;
+ /* Done this way to fix compiler error on IRIX 5.x */
+ sendto_ip = *iface_bcast(*iface_n_ip(i));
+ *return_ip_list = name_query(sock, name, name_type, True,
+ True, sendto_ip, return_count);
+ if(*return_ip_list != NULL) {
+ close(sock);
+ return True;
+ }
+ }
+
+ close(sock);
+ return False;
+}
+
+/********************************************************
+ Resolve via "wins" method.
+*********************************************************/
+
+static BOOL resolve_wins(const char *name, int name_type,
+ struct in_addr **return_iplist, int *return_count)
+{
+ int sock;
+ struct in_addr wins_ip;
+ BOOL wins_ismyip;
+
+ *return_iplist = NULL;
+ *return_count = 0;
+
+ /*
+ * "wins" means do a unicast lookup to the WINS server.
+ * Ignore if there is no WINS server specified or if the
+ * WINS server is one of our interfaces (if we're being
+ * called from within nmbd - we can't do this call as we
+ * would then block).
+ */
+
+ 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;
+ }
+
+ wins_ip = wins_srv_ip();
+ wins_ismyip = ismyip(wins_ip);
+
+ DEBUG(3, ("resolve_wins: WINS server == <%s>\n", inet_ntoa(wins_ip)) );
+ if((wins_ismyip && !global_in_nmbd) || !wins_ismyip) {
+ sock = open_socket_in( SOCK_DGRAM, 0, 3,
+ interpret_addr(lp_socket_address()),
+ True );
+ if (sock != -1) {
+ *return_iplist = name_query( sock, name,
+ name_type, False,
+ True, wins_ip,
+ return_count);
+ if(*return_iplist != NULL) {
+ close(sock);
+ return True;
+ }
+ close(sock);
+ }
+ }
+
+ return False;
+}
+
+/********************************************************
+ 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.
+ */
+
+ FILE *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( 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 = Get_Hostbyname(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;
+}
+
+/********************************************************
+ 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.
+*********************************************************/
+BOOL is_ip_address(const char *name)
+{
+ int i;
+ for (i=0; name[i]; i++)
+ if (!(isdigit((int)name[i]) || name[i] == '.'))
+ return False;
+
+ return True;
+}
+
+
+/********************************************************
+ 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;
+ 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);
+ *return_iplist = NULL;
+ *return_count = 0;
+
+ 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;
+ }
+
+ 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 && resolve_hosts(name, return_iplist, return_count)) {
+ return True;
+ }
+ } else if(strequal( tok, "lmhosts")) {
+ if (resolve_lmhosts(name, name_type, return_iplist, return_count)) {
+ return True;
+ }
+ } else if(strequal( tok, "wins")) {
+ /* don't resolve 1D via WINS */
+ if (name_type != 0x1D &&
+ resolve_wins(name, name_type, return_iplist, return_count)) {
+ return True;
+ }
+ } else if(strequal( tok, "bcast")) {
+ if (resolve_bcast(name, name_type, return_iplist, return_count)) {
+ return True;
+ }
+ } else {
+ DEBUG(0,("resolve_name: unknown name switch type %s\n", tok));
}
- found=True; retries=0;
- free_packet(p2);
- if (fn) break;
+ }
+
+ if((*return_iplist) != NULL) {
+ free((char *)(*return_iplist));
+ *return_iplist = NULL;
+ }
+ return False;
+}
+
+/********************************************************
+ 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(internal_resolve_name(name, name_type, &ip_list, &count)) {
+ *return_ip = ip_list[0];
+ free((char *)ip_list);
+ return True;
}
- }
+ if(ip_list != NULL)
+ free((char *)ip_list);
+ return False;
+}
+
+
+/********************************************************
+ resolve a name of format \\server_name or \\ipaddress
+ into a name. also, cut the \\ from the front for us.
+*********************************************************/
+
+BOOL resolve_srv_name(const char* srv_name, fstring dest_host,
+ struct in_addr *ip)
+{
+ BOOL ret;
+ const char *sv_name = srv_name;
+
+ DEBUG(10,("resolve_srv_name: %s\n", srv_name));
+
+ if (srv_name == NULL || strequal("\\\\.", srv_name))
+ {
+ extern pstring global_myname;
+ fstrcpy(dest_host, global_myname);
+ ip = interpret_addr2("127.0.0.1");
+ return True;
+ }
+
+ if (strnequal("\\\\", srv_name, 2))
+ {
+ sv_name = &srv_name[2];
+ }
+
+ fstrcpy(dest_host, sv_name);
+ /* treat the '*' name specially - it is a magic name for the PDC */
+ if (strcmp(dest_host,"*") == 0) {
+ extern pstring global_myname;
+ ret = resolve_name(lp_workgroup(), ip, 0x1B);
+ lookup_pdc_name(global_myname, lp_workgroup(), ip, dest_host);
+ } else {
+ ret = resolve_name(dest_host, ip, 0x20);
+ }
+
+ if (is_ip_address(dest_host))
+ {
+ fstrcpy(dest_host, "*SMBSERVER");
+ }
+
+ return ret;
+}
+
+
+/********************************************************
+ Find the IP address of the master browser or DMB for a workgroup.
+*********************************************************/
- return(found);
+BOOL find_master_ip(char *group, struct in_addr *master_ip)
+{
+ struct in_addr *ip_list = NULL;
+ int count = 0;
+
+ if (internal_resolve_name(group, 0x1D, &ip_list, &count)) {
+ *master_ip = ip_list[0];
+ free((char *)ip_list);
+ return True;
+ }
+ if(internal_resolve_name(group, 0x1B, &ip_list, &count)) {
+ *master_ip = ip_list[0];
+ free((char *)ip_list);
+ return True;
+ }
+
+ if(ip_list != NULL)
+ free((char *)ip_list);
+ return False;
+}
+
+
+/********************************************************
+ Lookup a PDC name given a Domain name and IP address.
+*********************************************************/
+BOOL lookup_pdc_name(const char *srcname, const char *domain, struct in_addr *pdc_ip, char *ret_name)
+{
+ 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 = "\\MAILSLOT\\NET\\NETLOGON";
+ 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), "\\MAILSLOT\\NET\\GETDC%d", dgm_id);
+ mailslot_name = bufp;
+ bufp += (strlen(bufp) + 1);
+ bufp = ALIGN2(bufp, buffer);
+ bufp += dos_PutUniCode(bufp, srcname, sizeof(buffer) - (bufp - buffer) - 1, True);
+ 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,0x1B);
+
+ 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;
+}
+
+
+/********************************************************
+ Get the IP address list of the PDC/BDC's of a Domain.
+*********************************************************/
+BOOL get_dc_list(char *group, struct in_addr **ip_list, int *count)
+{
+ return internal_resolve_name(group, 0x1C, ip_list, count);
}
git.samba.org / tprouty / samba.git / blobdiff