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-rw-r--r--source3/namedbname.c283
1 files changed, 158 insertions, 125 deletions
diff --git a/source3/namedbname.c b/source3/namedbname.c
index 1f16553b0f..f084424a29 100644
--- a/source3/namedbname.c
+++ b/source3/namedbname.c
@@ -27,6 +27,10 @@
04 jul 96: lkcl@pires.co.uk
created module namedbname containing name database functions
+
+ 30 July 96: David.Chappell@mail.trincoll.edu
+ Expanded multiple workgroup domain master browser support.
+
*/
#include "includes.h"
@@ -43,6 +47,16 @@ extern struct subnet_record *subnetlist;
uint16 nb_type = 0; /* samba's NetBIOS name type */
+static char *source_description[] =
+{
+ "STATUS_QUERY",
+ "LMHOSTS",
+ "REG",
+ "SELF",
+ "DNS",
+ "DNSFAIL"
+};
+
/****************************************************************************
samba's NetBIOS name type
@@ -52,14 +66,14 @@ uint16 nb_type = 0; /* samba's NetBIOS name type */
****************************************************************************/
void set_samba_nb_type(void)
{
- if (lp_wins_support() || (*lp_wins_server()))
- {
- nb_type = NB_MFLAG; /* samba is a 'hybrid' node type */
- }
- else
- {
- nb_type = NB_BFLAG; /* samba is broadcast-only node type */
- }
+ if (lp_wins_support() || (*lp_wins_server()))
+ {
+ nb_type = NB_MFLAG; /* samba is a 'hybrid' node type */
+ }
+ else
+ {
+ nb_type = NB_BFLAG; /* samba is broadcast-only node type */
+ }
}
@@ -69,7 +83,7 @@ void set_samba_nb_type(void)
BOOL name_equal(struct nmb_name *n1,struct nmb_name *n2)
{
return n1->name_type == n2->name_type &&
- strequal(n1->name ,n2->name ) &&
+ strequal(n1->name ,n2->name ) &&
strequal(n1->scope,n2->scope);
}
@@ -140,22 +154,22 @@ void remove_name(struct subnet_record *d, struct name_record *n)
find a name in a namelist.
**************************************************************************/
struct name_record *find_name(struct name_record *n,
- struct nmb_name *name,
- int search)
+ struct nmb_name *name,
+ int search)
{
- struct name_record *ret;
+ struct name_record *ret;
- for (ret = n; ret; ret = ret->next)
- {
- if (name_equal(&ret->name,name))
- {
- /* self search: self names only */
- if ((search&FIND_SELF) == FIND_SELF && ret->source != SELF)
- continue;
-
- return ret;
- }
- }
+ for (ret = n; ret; ret = ret->next)
+ {
+ if (name_equal(&ret->name,name))
+ {
+ /* self search: self names only */
+ if ((search&FIND_SELF) == FIND_SELF && ret->source != SELF)
+ continue;
+
+ return ret;
+ }
+ }
return NULL;
}
@@ -168,29 +182,31 @@ struct name_record *find_name(struct name_record *n,
FIND_WINS - look for names in the WINS record
**************************************************************************/
struct name_record *find_name_search(struct subnet_record **d,
- struct nmb_name *name,
- int search, struct in_addr ip)
+ struct nmb_name *name,
+ int search, struct in_addr ip)
{
- if (d == NULL) return NULL; /* bad error! */
-
- if (search & FIND_LOCAL) {
- if (*d != NULL) {
- struct name_record *n = find_name((*d)->namelist, name, search);
- DEBUG(4,("find_name on local: %s %s search %x\n",
- namestr(name),inet_ntoa(ip), search));
- if (n) return n;
- }
+ if (d == NULL) return NULL; /* bad error! */
+
+ if (search & FIND_LOCAL)
+ {
+ if (*d != NULL)
+ {
+ struct name_record *n = find_name((*d)->namelist, name, search);
+ DEBUG(4,("find_name on local: %s %s search %x\n",
+ namestr(name),inet_ntoa(ip), search));
+ if (n) return n;
+ }
}
- if (!(search & FIND_WINS)) return NULL;
+ if ((search & FIND_WINS) != FIND_WINS) return NULL;
/* find WINS subnet record. */
*d = find_subnet(ipgrp);
-
+
if (*d == NULL) return NULL;
-
+
DEBUG(4,("find_name on WINS: %s %s search %x\n",
- namestr(name),inet_ntoa(ip), search));
+ namestr(name),inet_ntoa(ip), search));
return find_name((*d)->namelist, name, search);
}
@@ -228,20 +244,18 @@ void dump_names(void)
{
int i;
- DEBUG(3,("%15s ", inet_ntoa(d->bcast_ip)));
- DEBUG(3,("%15s ", inet_ntoa(d->mask_ip)));
- DEBUG(3,("%-19s TTL=%ld ",
- namestr(&n->name),
- n->death_time?n->death_time-t:0));
+ DEBUG(3,("%-15s ", inet_ntoa(d->bcast_ip)));
+ DEBUG(3,("%-19s TTL=%7ld %s ",
+ namestr(&n->name),
+ n->death_time?n->death_time-t:0, source_description[n->source]));
for (i = 0; i < n->num_ips; i++)
{
- DEBUG(3,("%15s NB=%2x source=%d",
- inet_ntoa(n->ip_flgs[i].ip),
- n->ip_flgs[i].nb_flags,n->source));
-
+ DEBUG(3,("%-15s NB=%2x ",
+ inet_ntoa(n->ip_flgs[i].ip),
+ (unsigned char)n->ip_flgs[i].nb_flags));
}
- DEBUG(3,("\n"));
+ DEBUG(3,("\n"));
if (f && ip_equal(d->bcast_ip, ipgrp) && n->source == REGISTER)
{
@@ -249,16 +263,16 @@ void dump_names(void)
anything other than as a hexadecimal number :-) */
fprintf(f, "%s#%02x %ld ",
- n->name.name,n->name.name_type, /* XXXX ignore scope for now */
- n->death_time);
+ n->name.name,n->name.name_type, /* XXXX ignore scope for now */
+ n->death_time);
for (i = 0; i < n->num_ips; i++)
{
fprintf(f, "%s %2x ",
- inet_ntoa(n->ip_flgs[i].ip),
- n->ip_flgs[i].nb_flags);
+ inet_ntoa(n->ip_flgs[i].ip),
+ (unsigned char)n->ip_flgs[i].nb_flags);
}
- fprintf(f, "\n");
+ fprintf(f, "\n");
}
}
@@ -307,12 +321,12 @@ void load_netbios_names(void)
int type = 0;
unsigned int nb_flags;
time_t ttd;
- struct in_addr ipaddr;
+ struct in_addr ipaddr;
- enum name_source source;
+ enum name_source source;
char *ptr;
- int count = 0;
+ int count = 0;
char *p;
@@ -320,20 +334,20 @@ void load_netbios_names(void)
if (*line == '#') continue;
- ptr = line;
+ ptr = line;
- if (next_token(&ptr,name_str ,NULL)) ++count;
- if (next_token(&ptr,ttd_str ,NULL)) ++count;
- if (next_token(&ptr,ip_str ,NULL)) ++count;
- if (next_token(&ptr,nb_flags_str,NULL)) ++count;
+ if (next_token(&ptr,name_str ,NULL)) ++count;
+ if (next_token(&ptr,ttd_str ,NULL)) ++count;
+ if (next_token(&ptr,ip_str ,NULL)) ++count;
+ if (next_token(&ptr,nb_flags_str,NULL)) ++count;
- if (count <= 0) continue;
+ if (count <= 0) continue;
- if (count != 4) {
- DEBUG(0,("Ill formed wins line"));
- DEBUG(0,("[%s]: name#type abs_time ip nb_flags\n",line));
- continue;
- }
+ if (count != 4) {
+ DEBUG(0,("Ill formed wins line"));
+ DEBUG(0,("[%s]: name#type abs_time ip nb_flags\n",line));
+ continue;
+ }
/* netbios name. # divides the name from the type (hex): netbios#xx */
strcpy(name,name_str);
@@ -341,15 +355,15 @@ void load_netbios_names(void)
p = strchr(name,'#');
if (p) {
- *p = 0;
- sscanf(p+1,"%x",&type);
+ *p = 0;
+ sscanf(p+1,"%x",&type);
}
/* decode the netbios flags (hex) and the time-to-die (seconds) */
- sscanf(nb_flags_str,"%x",&nb_flags);
- sscanf(ttd_str,"%ld",&ttd);
+ sscanf(nb_flags_str,"%x",&nb_flags);
+ sscanf(ttd_str,"%ld",&ttd);
- ipaddr = *interpret_addr2(ip_str);
+ ipaddr = *interpret_addr2(ip_str);
if (ip_equal(ipaddr,ipzero)) {
source = SELF;
@@ -360,7 +374,7 @@ void load_netbios_names(void)
}
DEBUG(4, ("add WINS line: %s#%02x %ld %s %2x\n",
- name,type, ttd, inet_ntoa(ipaddr), nb_flags));
+ name,type, ttd, inet_ntoa(ipaddr), nb_flags));
/* add all entries that have 60 seconds or more to live */
if (ttd - 60 > time(NULL) || ttd == 0)
@@ -380,8 +394,8 @@ void load_netbios_names(void)
remove an entry from the name list
****************************************************************************/
void remove_netbios_name(struct subnet_record *d,
- char *name,int type, enum name_source source,
- struct in_addr ip)
+ char *name,int type, enum name_source source,
+ struct in_addr ip)
{
struct nmb_name nn;
struct name_record *n;
@@ -405,14 +419,22 @@ void remove_netbios_name(struct subnet_record *d,
****************************************************************************/
struct name_record *add_netbios_entry(struct subnet_record *d,
- char *name, int type, int nb_flags,
- int ttl, enum name_source source, struct in_addr ip,
- BOOL new_only,BOOL wins)
+ char *name, int type, int nb_flags,
+ int ttl, enum name_source source, struct in_addr ip,
+ BOOL new_only,BOOL wins)
{
struct name_record *n;
struct name_record *n2=NULL;
int search = 0;
- BOOL self = source == SELF;
+ BOOL self;
+
+ if (iface_ip(ip))
+ {
+ source = SELF;
+ putip(&ip, &ipzero);
+ }
+
+ self = source == SELF;
/* add the name to the WINS list if the name comes from a directed query */
search |= wins ? FIND_WINS : FIND_LOCAL;
@@ -465,46 +487,57 @@ struct name_record *add_netbios_entry(struct subnet_record *d,
if (!n2) add_name(d,n);
DEBUG(3,("Added netbios name %s at %s ttl=%d nb_flags=%2x\n",
- namestr(&n->name),inet_ntoa(ip),ttl,nb_flags));
+ namestr(&n->name),inet_ntoa(ip),ttl,nb_flags));
return(n);
}
/*******************************************************************
- expires old names in the namelist
+ expires or refreshes old names in the namelist
+
+ if the name is a samba SELF name, it must be refreshed rather than
+ removed.
******************************************************************/
-void expire_names(time_t t)
+void check_expire_names(time_t t)
{
- struct name_record *n;
- struct name_record *next;
- struct subnet_record *d;
-
- /* expire old names */
- for (d = subnetlist; d; d = d->next)
- {
- for (n = d->namelist; n; n = next)
- {
- next = n->next;
- if (n->death_time && n->death_time < t)
- {
- if (n->source == SELF) {
- DEBUG(3,("not expiring SELF name %s\n", namestr(&n->name)));
- n->death_time += 300;
- continue;
- }
- DEBUG(3,("Removing dead name %s\n", namestr(&n->name)));
-
- if (n->prev) n->prev->next = n->next;
- if (n->next) n->next->prev = n->prev;
-
- if (d->namelist == n) d->namelist = n->next;
-
- free(n->ip_flgs);
- free(n);
- }
- }
- }
+ struct name_record *n;
+ struct name_record *next;
+ struct subnet_record *d;
+
+ /* expire old names */
+ for (d = subnetlist; d; d = d->next)
+ {
+ for (n = d->namelist; n; n = next)
+ {
+ next = n->next;
+
+ if (n->death_time && n->death_time < t)
+ {
+ if (n->source == SELF)
+ {
+ /* refresh the samba name. if this refresh fails
+ for any reason, it will be deleted.
+ */
+ DEBUG(3,("Refreshing SELF name %s\n", namestr(&n->name)));
+ add_my_name_entry(d, -1,
+ n->name.name, n->name.name_type,
+ n->ip_flgs[0].nb_flags);
+ continue;
+ }
+
+ DEBUG(3,("Removing dead name %s\n", namestr(&n->name)));
+
+ if (n->prev) n->prev->next = n->next;
+ if (n->next) n->next->prev = n->prev;
+
+ if (d->namelist == n) d->namelist = n->next;
+
+ free(n->ip_flgs);
+ free(n);
+ }
+ }
+ }
}
@@ -512,8 +545,8 @@ void expire_names(time_t t)
reply to a name query
****************************************************************************/
struct name_record *search_for_name(struct subnet_record **d,
- struct nmb_name *question,
- struct in_addr ip, int Time, int search)
+ struct nmb_name *question,
+ struct in_addr ip, int Time, int search)
{
int name_type = question->name_type;
char *qname = question->name;
@@ -538,10 +571,10 @@ struct name_record *search_for_name(struct subnet_record **d,
/* only do DNS lookups if the query is for type 0x20 or type 0x0 */
if (!dns_type && name_type != 0x1b)
- {
- DEBUG(3,("types 0x20 0x1b 0x0 only: name not found\n"));
- return NULL;
- }
+ {
+ DEBUG(3,("types 0x20 0x1b 0x0 only: name not found\n"));
+ return NULL;
+ }
/* look it up with DNS */
a = interpret_addr(qname);
@@ -549,18 +582,18 @@ struct name_record *search_for_name(struct subnet_record **d,
putip((char *)&dns_ip,(char *)&a);
if (!a)
- {
- /* no luck with DNS. We could possibly recurse here XXXX */
- DEBUG(3,("no recursion.\n"));
+ {
+ /* no luck with DNS. We could possibly recurse here XXXX */
+ DEBUG(3,("no recursion.\n"));
/* add the fail to our WINS cache of names. give it 1 hour in the cache */
- add_netbios_entry(*d,qname,name_type,NB_ACTIVE,60*60,DNSFAIL,dns_ip,
- True, True);
- return NULL;
- }
+ add_netbios_entry(*d,qname,name_type,NB_ACTIVE,60*60,DNSFAIL,dns_ip,
+ True, True);
+ return NULL;
+ }
/* add it to our WINS cache of names. give it 2 hours in the cache */
n = add_netbios_entry(*d,qname,name_type,NB_ACTIVE,2*60*60,DNS,dns_ip,
- True,True);
+ True,True);
/* failed to add it? yikes! */
if (!n) return NULL;
generated by cgit (git 2.34.1) at 2024-07-06 09:35:30 +0000