static void complete_one(struct sync_record *s,
char *sname, uint32 stype, char *comment)
{
struct work_record *work;
struct server_record *servrec;
stype &= ~SV_TYPE_LOCAL_LIST_ONLY;
if (stype & SV_TYPE_DOMAIN_ENUM) {
/* See if we can find the workgroup on this subnet. */
if((work=find_workgroup_on_subnet(unicast_subnet, sname))) {
/* We already know about this workgroup -
update the ttl. */
update_workgroup_ttl(work,lp_max_ttl());
} else {
/* Create the workgroup on the subnet. */
work = create_workgroup_on_subnet(unicast_subnet,
sname, lp_max_ttl());
if (work) {
/* remember who the master is */
unstrcpy(work->local_master_browser_name, comment);
}
}
return;
}
work = find_workgroup_on_subnet(unicast_subnet, s->workgroup);
if (!work) {
DEBUG(3,("workgroup %s doesn't exist on unicast subnet?\n",
s->workgroup));
return;
}
if ((servrec = find_server_in_workgroup( work, sname))) {
/* Check that this is not a locally known
server - if so ignore the entry. */
if(!(servrec->serv.type & SV_TYPE_LOCAL_LIST_ONLY)) {
/* We already know about this server - update
the ttl. */
update_server_ttl(servrec, lp_max_ttl());
/* Update the type. */
servrec->serv.type = stype;
}
return;
}
/* Create the server in the workgroup. */
create_server_on_workgroup(work, sname,stype, lp_max_ttl(), comment);
}
void process_host_announce(struct subnet_record *subrec, struct packet_struct *p, char *buf)
{
struct dgram_packet *dgram = &p->packet.dgram;
int ttl = IVAL(buf,1)/1000;
unstring announce_name;
uint32 servertype = IVAL(buf,23);
fstring comment;
struct work_record *work;
struct server_record *servrec;
unstring work_name;
unstring source_name;
START_PROFILE(host_announce);
pull_ascii_fstring(comment, buf+31);
pull_ascii_nstring(announce_name, sizeof(announce_name), buf+5);
pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
DEBUG(3,("process_host_announce: from %s<%02x> IP %s to \
%s for server %s.\n", source_name, source_name[15], inet_ntoa(p->ip),
nmb_namestr(&dgram->dest_name),announce_name));
DEBUG(5,("process_host_announce: ttl=%d server type=%08x comment=%s\n",
ttl, servertype,comment));
/* Filter servertype to remove impossible bits. */
servertype &= ~(SV_TYPE_LOCAL_LIST_ONLY|SV_TYPE_DOMAIN_ENUM);
/* A host announcement must be sent to the name WORKGROUP<1d>. */
if(dgram->dest_name.name_type != 0x1d) {
DEBUG(2,("process_host_announce: incorrect name type for destination from IP %s \
(was %02x) should be 0x1d. Allowing packet anyway.\n",
inet_ntoa(p->ip), dgram->dest_name.name_type));
/* Change it so it was. */
dgram->dest_name.name_type = 0x1d;
}
/* For a host announce the workgroup name is the destination name. */
pull_ascii_nstring(work_name, sizeof(work_name), dgram->dest_name.name);
/*
* Syntax servers version 5.1 send HostAnnounce packets to
* *THE WRONG NAME*. They send to LOCAL_MASTER_BROWSER_NAME<00>
* instead of WORKGROUP<1d> name. So to fix this we check if
* the workgroup name is our own name, and if so change it
* to be our primary workgroup name.
*/
if(strequal(work_name, global_myname()))
unstrcpy(work_name,lp_workgroup());
/*
* We are being very agressive here in adding a workgroup
* name on the basis of a host announcing itself as being
* in that workgroup. Maybe we should wait for the workgroup
* announce instead ? JRA.
*/
work = find_workgroup_on_subnet(subrec, work_name);
if(servertype != 0) {
if (work ==NULL ) {
/* We have no record of this workgroup. Add it. */
if((work = create_workgroup_on_subnet(subrec, work_name, ttl))==NULL)
goto done;
}
if((servrec = find_server_in_workgroup( work, announce_name))==NULL) {
/* If this server is not already in the workgroup, add it. */
create_server_on_workgroup(work, announce_name,
servertype|SV_TYPE_LOCAL_LIST_ONLY,
ttl, comment);
} else {
/* Update the record. */
servrec->serv.type = servertype|SV_TYPE_LOCAL_LIST_ONLY;
update_server_ttl( servrec, ttl);
fstrcpy(servrec->serv.comment,comment);
}
} else {
/*
* This server is announcing it is going down. Remove it from the
* workgroup.
*/
if(!is_myname(announce_name) && (work != NULL) &&
((servrec = find_server_in_workgroup( work, announce_name))!=NULL)) {
remove_server_from_workgroup( work, servrec);
}
}
subrec->work_changed = True;
done:
END_PROFILE(host_announce);
}
void process_local_master_announce(struct subnet_record *subrec, struct packet_struct *p, char *buf)
{
struct dgram_packet *dgram = &p->packet.dgram;
int ttl = IVAL(buf,1)/1000;
unstring server_name;
uint32 servertype = IVAL(buf,23);
fstring comment;
unstring work_name;
struct work_record *work;
struct server_record *servrec;
unstring source_name;
START_PROFILE(local_master_announce);
pull_ascii_nstring(server_name,sizeof(server_name),buf+5);
pull_ascii_fstring(comment, buf+31);
pull_ascii_nstring(source_name, sizeof(source_name), dgram->source_name.name);
pull_ascii_nstring(work_name, sizeof(work_name), dgram->dest_name.name);
DEBUG(3,("process_local_master_announce: from %s<%02x> IP %s to \
%s for server %s.\n", source_name, source_name[15], inet_ntoa(p->ip),
nmb_namestr(&dgram->dest_name),server_name));
DEBUG(5,("process_local_master_announce: ttl=%d server type=%08x comment=%s\n",
ttl, servertype, comment));
/* A local master announcement must be sent to the name WORKGROUP<1e>. */
if(dgram->dest_name.name_type != 0x1e) {
DEBUG(0,("process_local_master_announce: incorrect name type for destination from IP %s \
(was %02x) should be 0x1e. Ignoring packet.\n",
inet_ntoa(p->ip), dgram->dest_name.name_type));
goto done;
}
/* Filter servertype to remove impossible bits. */
servertype &= ~(SV_TYPE_LOCAL_LIST_ONLY|SV_TYPE_DOMAIN_ENUM);
/* For a local master announce the workgroup name is the destination name. */
if ((work = find_workgroup_on_subnet(subrec, work_name))==NULL) {
/* Don't bother adding if it's a local master release announce. */
if(servertype == 0)
goto done;
/* We have no record of this workgroup. Add it. */
if((work = create_workgroup_on_subnet(subrec, work_name, ttl))==NULL)
goto done;
}
/* If we think we're the local master browser for this workgroup,
we should never have got this packet. We don't see our own
packets.
*/
if(AM_LOCAL_MASTER_BROWSER(work)) {
DEBUG(0,("process_local_master_announce: Server %s at IP %s is announcing itself as \
a local master browser for workgroup %s and we think we are master. Forcing election.\n",
server_name, inet_ntoa(p->ip), work_name));
/* Samba nmbd versions 1.9.17 to 1.9.17p4 have a bug in that when
they have become a local master browser once, they will never
stop sending local master announcements. To fix this we send
them a reset browser packet, with level 0x2 on the __SAMBA__
name that only they should be listening to. */
send_browser_reset( 0x2, "__SAMBA__" , 0x20, p->ip);
/* We should demote ourself and force an election. */
unbecome_local_master_browser( subrec, work, True);
/* The actual election requests are handled in nmbd_election.c */
goto done;
}
/* Find the server record on this workgroup. If it doesn't exist, add it. */
if(servertype != 0) {
if((servrec = find_server_in_workgroup( work, server_name))==NULL) {
/* If this server is not already in the workgroup, add it. */
create_server_on_workgroup(work, server_name,
servertype|SV_TYPE_LOCAL_LIST_ONLY,
ttl, comment);
} else {
/* Update the record. */
servrec->serv.type = servertype|SV_TYPE_LOCAL_LIST_ONLY;
update_server_ttl(servrec, ttl);
fstrcpy(servrec->serv.comment,comment);
}
set_workgroup_local_master_browser_name( work, server_name );
} else {
/*
* This server is announcing it is going down. Remove it from the
* workgroup.
*/
if(!is_myname(server_name) && (work != NULL) &&
((servrec = find_server_in_workgroup( work, server_name))!=NULL)) {
remove_server_from_workgroup( work, servrec);
}
}
subrec->work_changed = True;
done:
END_PROFILE(local_master_announce);
}
