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 collect_all_workgroup_names_from_wins_server(time_t t)
{
static time_t lastrun = 0;
struct work_record *work;
/* Only do this if we are using a WINS server. */
if(we_are_a_wins_client() == False)
return;
/* Check to see if we are a domain master browser on the unicast subnet. */
if((work = find_workgroup_on_subnet( unicast_subnet, lp_workgroup())) == NULL) {
if( DEBUGLVL( 0 ) ) {
dbgtext( "collect_all_workgroup_names_from_wins_server:\n" );
dbgtext( "Cannot find my workgroup %s ", lp_workgroup() );
dbgtext( "on subnet %s.\n", unicast_subnet->subnet_name );
}
return;
}
if(!AM_DOMAIN_MASTER_BROWSER(work))
return;
if ((lastrun != 0) && (t < lastrun + (15 * 60)))
return;
lastrun = t;
/* First, query for the *<1b> name from the WINS server. */
query_name(unicast_subnet, "*", 0x1b,
find_all_domain_master_names_query_success,
find_all_domain_master_names_query_fail,
NULL);
}
void sync_all_dmbs(time_t t)
{
static time_t lastrun = 0;
struct work_record *work;
int count=0;
/* Only do this if we are using a WINS server. */
if(we_are_a_wins_client() == False)
return;
/* Check to see if we are a domain master browser on the
unicast subnet. */
work = find_workgroup_on_subnet(unicast_subnet, lp_workgroup());
if (!work)
return;
if (!AM_DOMAIN_MASTER_BROWSER(work))
return;
if ((lastrun != 0) && (t < lastrun + (5 * 60)))
return;
/* count how many syncs we might need to do */
for (work=unicast_subnet->workgrouplist; work; work = work->next) {
if (strcmp(lp_workgroup(), work->work_group)) {
count++;
}
}
/* sync with a probability of 1/count */
for (work=unicast_subnet->workgrouplist; work; work = work->next) {
if (strcmp(lp_workgroup(), work->work_group)) {
unstring dmb_name;
if (((unsigned)sys_random()) % count != 0)
continue;
lastrun = t;
if (!work->dmb_name.name[0]) {
/* we don't know the DMB - assume it is
the same as the unicast local master */
make_nmb_name(&work->dmb_name,
work->local_master_browser_name,
0x20);
}
pull_ascii_nstring(dmb_name, sizeof(dmb_name), work->dmb_name.name);
DEBUG(3,("Initiating DMB<->DMB sync with %s(%s)\n",
dmb_name, inet_ntoa(work->dmb_addr)));
sync_browse_lists(work,
dmb_name,
work->dmb_name.name_type,
work->dmb_addr, False, False);
}
}
}
static void reset_workgroup_state( struct subnet_record *subrec, const char *workgroup_name,
bool force_new_election )
{
struct work_record *work;
struct server_record *servrec;
struct nmb_name nmbname;
if((work = find_workgroup_on_subnet( subrec, workgroup_name)) == NULL) {
DEBUG(0,("reset_workgroup_state: Error - cannot find workgroup %s on \
subnet %s.\n", workgroup_name, subrec->subnet_name ));
return;
}
void process_workgroup_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 workgroup_announce_name;
unstring master_name;
uint32 servertype = IVAL(buf,23);
struct work_record *work;
unstring source_name;
unstring dest_name;
START_PROFILE(workgroup_announce);
pull_ascii_nstring(workgroup_announce_name,sizeof(workgroup_announce_name),buf+5);
pull_ascii_nstring(master_name,sizeof(master_name),buf+31);
pull_ascii_nstring(source_name,sizeof(source_name),dgram->source_name.name);
pull_ascii_nstring(dest_name,sizeof(dest_name),dgram->dest_name.name);
DEBUG(3,("process_workgroup_announce: from %s<%02x> IP %s to \
%s for workgroup %s.\n", source_name, source_name[15], inet_ntoa(p->ip),
nmb_namestr(&dgram->dest_name),workgroup_announce_name));
DEBUG(5,("process_workgroup_announce: ttl=%d server type=%08x master browser=%s\n",
ttl, servertype, master_name));
/* Workgroup announcements must only go to the MSBROWSE name. */
if (!strequal(dest_name, MSBROWSE) || (dgram->dest_name.name_type != 0x1)) {
DEBUG(0,("process_workgroup_announce: from IP %s should be to __MSBROWSE__<0x01> not %s\n",
inet_ntoa(p->ip), nmb_namestr(&dgram->dest_name)));
goto done;
}
if ((work = find_workgroup_on_subnet(subrec, workgroup_announce_name))==NULL) {
/* We have no record of this workgroup. Add it. */
if((work = create_workgroup_on_subnet(subrec, workgroup_announce_name, ttl))==NULL)
goto done;
} else {
/* Update the workgroup death_time. */
update_workgroup_ttl(work, ttl);
}
if(*work->local_master_browser_name == '\0') {
/* Set the master browser name. */
set_workgroup_local_master_browser_name( work, master_name );
}
subrec->work_changed = True;
done:
END_PROFILE(workgroup_announce);
}
static void become_domain_master_fail(struct subnet_record *subrec,
struct response_record *rrec,
struct nmb_name *fail_name)
{
struct work_record *work = find_workgroup_on_subnet(subrec, fail_name->name);
struct server_record *servrec;
if(!work)
{
DEBUG(0,("become_domain_master_fail: Error - cannot find \
workgroup %s on subnet %s\n", fail_name->name, subrec->subnet_name));
return;
}
static void become_logon_server_fail(struct subnet_record *subrec,
struct response_record *rrec,
struct nmb_name *fail_name)
{
unstring failname;
struct work_record *work;
struct server_record *servrec;
pull_ascii_nstring(failname, sizeof(failname), fail_name->name);
work = find_workgroup_on_subnet(subrec, failname);
if(!work) {
DEBUG(0,("become_logon_server_fail: Error - cannot find \
workgroup %s on subnet %s\n", failname, subrec->subnet_name));
return;
}
void announce_my_lm_server_names(time_t t)
{
struct subnet_record *subrec;
static time_t last_lm_announce_time=0;
int announce_interval = lp_lm_interval();
int lm_announce = lp_lm_announce();
if ((announce_interval <= 0) || (lm_announce <= 0))
{
/* user absolutely does not want LM announcements to be sent. */
return;
}
if ((lm_announce >= 2) && (!found_lm_clients))
{
/* has been set to 2 (Auto) but no LM clients detected (yet). */
return;
}
/* Otherwise: must have been set to 1 (Yes), or LM clients *have*
been detected. */
for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec))
{
struct work_record *work = find_workgroup_on_subnet(subrec, global_myworkgroup);
if(work)
{
struct server_record *servrec;
if (last_lm_announce_time && ((t - last_lm_announce_time) < announce_interval ))
continue;
last_lm_announce_time = t;
for (servrec = work->serverlist; servrec; servrec = servrec->next)
{
if (is_myname(servrec->serv.name))
/* skipping equivalent of announce_server() */
send_lm_host_announcement(subrec, work, servrec, announce_interval);
}
} /* if work */
} /* for subrec */
}
/****************************************************************************
As a domain master browser, do a sync with a local master browser.
**************************************************************************/
static void sync_with_lmb(struct browse_cache_record *browc)
{
struct work_record *work;
if( !(work = find_workgroup_on_subnet(unicast_subnet, browc->work_group)) )
{
if( DEBUGLVL( 0 ) )
{
dbgtext( "sync_with_lmb:\n" );
dbgtext( "Failed to get a workgroup for a local master browser " );
dbgtext( "cache entry workgroup " );
dbgtext( "%s, server %s\n", browc->work_group, browc->lmb_name );
}
return;
}
/* We should only be doing this if we are a domain master browser for
the given workgroup. Ensure this is so. */
if(!AM_DOMAIN_MASTER_BROWSER(work))
{
if( DEBUGLVL( 0 ) )
{
dbgtext( "sync_with_lmb:\n" );
dbgtext( "We are trying to sync with a local master browser " );
dbgtext( "%s for workgroup %s\n", browc->lmb_name, browc->work_group );
dbgtext( "and we are not a domain master browser on this workgroup.\n" );
dbgtext( "Error!\n" );
}
return;
}
if( DEBUGLVL( 2 ) )
{
dbgtext( "sync_with_lmb:\n" );
dbgtext( "Initiating sync with local master browser " );
dbgtext( "%s<0x20> at IP %s ", browc->lmb_name, inet_ntoa(browc->ip) );
dbgtext( "for workgroup %s\n", browc->work_group );
}
sync_browse_lists(work, browc->lmb_name, 0x20, browc->ip, True, True);
browc->sync_time += (CHECK_TIME_DMB_TO_LMB_SYNC * 60);
}
static void check_for_master_browser_fail( struct subnet_record *subrec,
struct response_record *rrec,
struct nmb_name *question_name,
int fail_code)
{
char *workgroup_name = question_name->name;
struct work_record *work = find_workgroup_on_subnet(subrec, workgroup_name);
if(work == NULL)
{
DEBUG(0,("check_for_master_browser_fail: Unable to find workgroup %s on subnet %s.=\n",
workgroup_name, subrec->subnet_name ));
return;
}
if (strequal(work->work_group, global_myworkgroup))
{
if (lp_local_master())
{
/* We have discovered that there is no local master
browser, and we are configured to initiate
an election that we will participate in.
*/
DEBUG(2,("check_for_master_browser_fail: Forcing election on workgroup %s subnet %s\n",
work->work_group, subrec->subnet_name ));
/* Setting this means we will participate when the
election is run in run_elections(). */
work->needelection = True;
}
else
{
/* We need to force an election, because we are configured
not to become the local master, but we still need one,
having detected that one doesn't exist.
*/
send_election_dgram(subrec, work->work_group, 0, 0, "");
}
}
}
void announce_my_server_names(time_t t)
{
struct subnet_record *subrec;
for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec))
{
struct work_record *work = find_workgroup_on_subnet(subrec, global_myworkgroup);
if(work)
{
struct server_record *servrec;
if (work->needannounce)
{
/* Drop back to a max 3 minute announce. This is to prevent a
single lost packet from breaking things for too long. */
work->announce_interval = MIN(work->announce_interval,
CHECK_TIME_MIN_HOST_ANNCE*60);
work->lastannounce_time = t - (work->announce_interval+1);
work->needannounce = False;
}
/* Announce every minute at first then progress to every 12 mins */
if ((t - work->lastannounce_time) < work->announce_interval)
continue;
if (work->announce_interval < (CHECK_TIME_MAX_HOST_ANNCE * 60))
work->announce_interval += 60;
work->lastannounce_time = t;
for (servrec = work->serverlist; servrec; servrec = servrec->next)
{
if (is_myname(servrec->serv.name))
announce_server(subrec, work, servrec);
}
} /* if work */
} /* for subrec */
}
void browse_sync_remote(time_t t)
{
char *s;
const char *ptr;
static time_t last_time = 0;
char *s2;
struct in_addr addr;
struct work_record *work;
char outbuf[1024];
char *p;
unstring myname;
TALLOC_CTX *frame = NULL;
if (last_time && (t < (last_time + REMOTE_ANNOUNCE_INTERVAL)))
return;
last_time = t;
s = lp_remote_browse_sync(talloc_tos());
if (!*s)
return;
/*
* We only do this if we are the local master browser
* for our workgroup on the firsst subnet.
*/
if((work = find_workgroup_on_subnet(FIRST_SUBNET, lp_workgroup())) == NULL) {
DEBUG(0,("browse_sync_remote: Cannot find workgroup %s on subnet %s\n",
lp_workgroup(), FIRST_SUBNET->subnet_name ));
return;
}
if(!AM_LOCAL_MASTER_BROWSER(work)) {
DEBUG(5,("browse_sync_remote: We can only do this if we are a local master browser \
for workgroup %s on subnet %s.\n", lp_workgroup(), FIRST_SUBNET->subnet_name ));
return;
}
static void find_domain_master_name_query_success(struct subnet_record *subrec,
struct userdata_struct *userdata_in,
struct nmb_name *q_name, struct in_addr answer_ip, struct res_rec *rrec)
{
/*
* Unfortunately, finding the IP address of the Domain Master Browser,
* as we have here, is not enough. We need to now do a sync to the
* SERVERNAME<0x20> NetBIOS name, as only recent NT servers will
* respond to the SMBSERVER name. To get this name from IP
* address we do a Node status request, and look for the first
* NAME<0x20> in the response, and take that as the server name.
* We also keep a cache of the Domain Master Browser name for this
* workgroup in the Workgroup struct, so that if the same IP addess
* is returned every time, we don't need to do the node status
* request.
*/
struct work_record *work;
struct nmb_name nmbname;
struct userdata_struct *userdata;
int size = sizeof(struct userdata_struct) + sizeof(fstring)+1;
if( !(work = find_workgroup_on_subnet(subrec, q_name->name)) )
{
if( DEBUGLVL( 0 ) )
{
dbgtext( "find_domain_master_name_query_success:\n" );
dbgtext( "Failed to find workgroup %s\n", q_name->name );
}
return;
}
/* First check if we already have a dmb for this workgroup. */
if(!is_zero_ip(work->dmb_addr) && ip_equal(work->dmb_addr, answer_ip))
{
/* Do the local master browser announcement to the domain
master browser name and IP. */
announce_local_master_browser_to_domain_master_browser( work );
/* Now synchronise lists with the domain master browser. */
sync_with_dmb(work);
return;
}
else
zero_ip(&work->dmb_addr);
/* Now initiate the node status request. */
make_nmb_name(&nmbname,"*",0x0);
/* Put the workgroup name into the userdata so we know
what workgroup we're talking to when the reply comes
back. */
/* Setup the userdata_struct - this is copied so we can use
a stack variable for this. */
if((userdata = (struct userdata_struct *)malloc(size)) == NULL)
{
DEBUG(0, ("find_domain_master_name_query_success: malloc fail.\n"));
return;
}
userdata->copy_fn = NULL;
userdata->free_fn = NULL;
userdata->userdata_len = strlen(work->work_group)+1;
pstrcpy(userdata->data, work->work_group);
node_status( subrec, &nmbname, answer_ip,
domain_master_node_status_success,
domain_master_node_status_fail,
userdata);
zero_free(userdata, size);
}
static void domain_master_node_status_success(struct subnet_record *subrec,
struct userdata_struct *userdata,
struct res_rec *answers,
struct in_addr from_ip)
{
struct work_record *work = find_workgroup_on_subnet( subrec, userdata->data);
if( work == NULL )
{
if( DEBUGLVL( 0 ) )
{
dbgtext( "domain_master_node_status_success:\n" );
dbgtext( "Unable to find workgroup " );
dbgtext( "%s on subnet %s.\n", userdata->data, subrec->subnet_name );
}
return;
}
if( DEBUGLVL( 3 ) )
{
dbgtext( "domain_master_node_status_success:\n" );
dbgtext( "Success in node status for workgroup " );
dbgtext( "%s from ip %s\n", work->work_group, inet_ntoa(from_ip) );
}
/* Go through the list of names found at answers->rdata and look for
the first SERVER<0x20> name. */
if(answers->rdata != NULL)
{
char *p = answers->rdata;
int numnames = CVAL(p, 0);
p += 1;
while (numnames--)
{
char qname[17];
uint16 nb_flags;
int name_type;
StrnCpy(qname,p,15);
name_type = CVAL(p,15);
nb_flags = get_nb_flags(&p[16]);
trim_string(qname,NULL," ");
p += 18;
if(!(nb_flags & NB_GROUP) && (name_type == 0x20))
{
struct nmb_name nmbname;
make_nmb_name(&nmbname, qname, name_type);
/* Copy the dmb name and IP address
into the workgroup struct. */
work->dmb_name = nmbname;
putip((char *)&work->dmb_addr, &from_ip);
/* Do the local master browser announcement to the domain
master browser name and IP. */
announce_local_master_browser_to_domain_master_browser( work );
/* Now synchronise lists with the domain master browser. */
sync_with_dmb(work);
break;
}
}
}
else
if( DEBUGLVL( 0 ) )
{
dbgtext( "domain_master_node_status_success:\n" );
dbgtext( "Failed to find a SERVER<0x20> name in reply from IP " );
dbgtext( "%s.\n", inet_ntoa(from_ip) );
}
}
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);
}
static void get_domain_master_name_node_status_success(struct subnet_record *subrec,
struct userdata_struct *userdata,
struct res_rec *answers,
struct in_addr from_ip)
{
struct work_record *work;
fstring server_name;
server_name[0] = 0;
if( DEBUGLVL( 3 ) )
{
dbgtext( "get_domain_master_name_node_status_success:\n" );
dbgtext( "Success in node status from ip %s\n", inet_ntoa(from_ip) );
}
/*
* Go through the list of names found at answers->rdata and look for
* the first WORKGROUP<0x1b> name.
*/
if(answers->rdata != NULL)
{
char *p = answers->rdata;
int numnames = CVAL(p, 0);
p += 1;
while (numnames--)
{
char qname[17];
uint16 nb_flags;
int name_type;
StrnCpy(qname,p,15);
name_type = CVAL(p,15);
nb_flags = get_nb_flags(&p[16]);
trim_string(qname,NULL," ");
p += 18;
if(!(nb_flags & NB_GROUP) && (name_type == 0x00) &&
server_name[0] == 0) {
/* this is almost certainly the server netbios name */
fstrcpy(server_name, qname);
continue;
}
if(!(nb_flags & NB_GROUP) && (name_type == 0x1b))
{
if( DEBUGLVL( 5 ) )
{
dbgtext( "get_domain_master_name_node_status_success:\n" );
dbgtext( "%s(%s) ", server_name, inet_ntoa(from_ip) );
dbgtext( "is a domain master browser for workgroup " );
dbgtext( "%s. Adding this name.\n", qname );
}
/*
* If we don't already know about this workgroup, add it
* to the workgroup list on the unicast_subnet.
*/
if((work = find_workgroup_on_subnet( subrec, qname)) == NULL)
{
struct nmb_name nmbname;
/*
* Add it - with an hour in the cache.
*/
if(!(work= create_workgroup_on_subnet(subrec, qname, 60*60)))
return;
/* remember who the master is */
fstrcpy(work->local_master_browser_name, server_name);
make_nmb_name(&nmbname, server_name, 0x20);
work->dmb_name = nmbname;
work->dmb_addr = from_ip;
}
break;
}
}
}
else
if( DEBUGLVL( 0 ) )
{
dbgtext( "get_domain_master_name_node_status_success:\n" );
dbgtext( "Failed to find a WORKGROUP<0x1b> name in reply from IP " );
dbgtext( "%s.\n", inet_ntoa(from_ip) );
}
}
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);
}