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-rw-r--r--source3/nameelect.c206
1 files changed, 176 insertions, 30 deletions
diff --git a/source3/nameelect.c b/source3/nameelect.c
index 855ea26348..bb219415b8 100644
--- a/source3/nameelect.c
+++ b/source3/nameelect.c
@@ -34,6 +34,7 @@ extern int DEBUGLEVEL;
extern pstring scope;
extern pstring myname;
+extern struct in_addr ipzero;
/* machine comment for host announcements */
extern pstring ServerComment;
@@ -149,50 +150,182 @@ void send_election(struct subnet_record *d, char *group,uint32 criterion,
}
+/****************************************************************************
+ un-register a SELF name that got rejected.
+
+ if this name happens to be rejected when samba is in the process
+ of becoming a master browser (registering __MSBROWSE__, WORKGROUP(1d)
+ or WORKGROUP(1b)) then we must stop being a master browser. sad.
+
+ **************************************************************************/
+void name_unregister_work(struct subnet_record *d, char *name, int name_type)
+{
+ struct work_record *work;
+
+ remove_netbios_name(d,name,name_type,SELF,ipzero);
+
+ if (!(work = find_workgroupstruct(d, name, False))) return;
+
+ if (special_browser_name(name, name_type) ||
+ (AM_MASTER(work) && strequal(name, lp_workgroup()) == 0 &&
+ (name_type == 0x1d || name_type == 0x1b)))
+ {
+ int remove_type = 0;
+
+ if (special_browser_name(name, name_type))
+ remove_type = SV_TYPE_MASTER_BROWSER|SV_TYPE_DOMAIN_MASTER;
+ if (name_type == 0x1d)
+ remove_type = SV_TYPE_MASTER_BROWSER;
+ if (name_type == 0x1b)
+ remove_type = SV_TYPE_DOMAIN_MASTER;
+
+ become_nonmaster(d, work, remove_type);
+ }
+}
+
+
+/****************************************************************************
+ registers a name.
+
+ if the name being added is a SELF name, we must additionally check
+ whether to proceed to the next stage in samba becoming a master browser.
+
+ **************************************************************************/
+void name_register_work(struct subnet_record *d, char *name, int name_type,
+ int nb_flags, time_t ttl, struct in_addr ip, BOOL bcast)
+{
+ enum name_source source = ismyip(ip) ? SELF : REGISTER;
+
+ if (source == SELF)
+ {
+ struct work_record *work = find_workgroupstruct(d, lp_workgroup(), False);
+
+ if (work && work->state != MST_NONE)
+ {
+ /* samba is in the process of working towards master browser-ness.
+ initiate the next stage.
+ */
+ become_master(d, work);
+ }
+ }
+ add_netbios_entry(d,name,name_type,nb_flags,ttl,source,ip,True,!bcast);
+}
+
+
/*******************************************************************
- become the master browser
+ become the master browser.
+
+ this is done in stages. note that this could take a while,
+ particularly on a broadcast subnet, as we have to wait for
+ the implicit registration of each name to be accepted.
+
+ as each name is successfully registered, become_master() is
+ called again, in order to initiate the next stage. see
+ dead_netbios_entry() - deals with implicit name registration
+ and response_name_reg() - deals with explicit registration
+ with a WINS server.
+
+ stage 1: was MST_NONE - go to MST_NONE and register ^1^2__MSBROWSE__^2^1.
+ stage 2: was MST_WON - go to MST_MSB and register WORKGROUP(0x1d)
+ stage 3: was MST_MSB - go to MST_BROWSER and register WORKGROUP(0x1b)
+ stage 4: was MST_BROWSER - go to MST_DOMAIN (do not pass GO, do not...)
+
+ XXXX note: this code still does not cope with the distinction
+ between different types of nodes, particularly between M and P
+ nodes. that comes later.
+
******************************************************************/
-static void become_master(struct subnet_record *d, struct work_record *work)
+void become_master(struct subnet_record *d, struct work_record *work)
{
- uint32 domain_type = SV_TYPE_DOMAIN_ENUM | SV_TYPE_SERVER_UNIX | 0x00400000;
+ uint32 domain_type = SV_TYPE_DOMAIN_ENUM|SV_TYPE_SERVER_UNIX|0x00400000;
if (!work) return;
- DEBUG(2,("Becoming master for %s\n",work->work_group));
+ DEBUG(2,("Becoming master for %s (stage %d)",work->work_group,work->state));
- work->ServerType |= SV_TYPE_MASTER_BROWSER;
- work->ServerType &= ~SV_TYPE_POTENTIAL_BROWSER;
- work->ElectionCriterion |= 0x5;
+ switch (work->state)
+ {
+ case MST_NONE: /* while we were nothing but a server... */
+ {
+ work->state = MST_WON; /* election win was successful */
+
+ work->ElectionCriterion |= 0x5;
+
+ /* update our server status */
+ work->ServerType &= ~SV_TYPE_POTENTIAL_BROWSER;
+ add_server_entry(d,work,myname,work->ServerType,0,ServerComment,True);
+
+ DEBUG(2,("first stage: register ^1^2__MSBROWSE__^2^1\n"));
+
+ /* add special browser name */
+ add_my_name_entry(d,MSBROWSE ,0x01,NB_ACTIVE|NB_GROUP);
+
+ break;
+ }
+ case MST_WON: /* while nothing had happened except we won an election... */
+ {
+ work->state = MST_MSB; /* registering MSBROWSE was successful */
+
+ /* add server entry on successful registration of MSBROWSE */
+ add_server_entry(d,work,work->work_group,domain_type,0,myname,True);
+
+ DEBUG(2,("second stage: register as master browser\n"));
+
+ /* add master name */
+ add_my_name_entry(d,work->work_group,0x1d,NB_ACTIVE );
- /* add browse, master and general names to database or register with WINS */
- add_my_name_entry(d,MSBROWSE ,0x01,NB_ACTIVE|NB_GROUP);
- add_my_name_entry(d,work->work_group,0x1d,NB_ACTIVE );
+ break;
+ }
+ case MST_MSB: /* while we were still only registered MSBROWSE state */
+ {
+ work->state = MST_BROWSER; /* registering WORKGROUP(1d) was successful */
+
+ /* update our server status */
+ work->ServerType |= SV_TYPE_MASTER_BROWSER;
+ add_server_entry(d,work,myname,work->ServerType,0,ServerComment,True);
+
+ if (d->my_interface && work->serverlist == NULL) /* no servers! */
+ {
+ /* ask all servers on our local net to announce to us */
+ announce_request(work, d->bcast_ip);
+ }
+
+ if (lp_domain_master())
+ {
+ DEBUG(2,("third stage: register as domain master\n"));
+ /* add domain master name */
+ add_my_name_entry(d,work->work_group,0x1b,NB_ACTIVE );
+ }
- if (lp_domain_master())
+ break;
+ }
+ case MST_BROWSER: /* while we were still a master browser... */
{
- DEBUG(4,("Domain master: adding names...\n"));
-
- /* add domain master and domain member names or register with WINS */
- add_my_name_entry(d,work->work_group,0x1b,NB_ACTIVE );
-
- work->ServerType |= SV_TYPE_DOMAIN_MASTER;
+ work->state = MST_DOMAIN; /* registering WORKGROUP(1b) was successful */
+
+ /* update our server status */
+ if (lp_domain_master())
+ {
+ work->ServerType |= SV_TYPE_DOMAIN_MASTER;
- if (lp_domain_logons())
- {
- work->ServerType |= SV_TYPE_DOMAIN_CTRL;
- work->ServerType |= SV_TYPE_DOMAIN_MEMBER;
- }
- }
-
- /* update our server status */
- add_server_entry(d,work,work->work_group,domain_type,0,myname,True);
- add_server_entry(d,work,myname,work->ServerType,0,ServerComment,True);
+ if (lp_domain_logons())
+ {
+ work->ServerType |= SV_TYPE_DOMAIN_CTRL;
+ work->ServerType |= SV_TYPE_DOMAIN_MEMBER;
+ }
+ DEBUG(2,("fourth stage: samba is now a domain master.\n"));
+ add_server_entry(d,work,myname,work->ServerType,0,ServerComment,True);
+ }
- if (d->my_interface)
+ break;
+ }
+ case MST_DOMAIN:
{
- /* ask all servers on our local net to announce to us */
- announce_request(work, d->bcast_ip);
+ /* nothing else to become, at the moment: we are top-dog. */
+ DEBUG(2,("fifth stage: there isn't one yet!\n"));
+ break;
}
+ }
}
@@ -222,6 +355,7 @@ void become_nonmaster(struct subnet_record *d, struct work_record *work,
work->ServerType |= SV_TYPE_POTENTIAL_BROWSER;
work->ElectionCriterion &= ~0x4;
+ work->state = MST_NONE;
/* announce ourselves as no longer active as a master browser. */
announce_server(d, work, work->work_group, myname, 0, 0);
@@ -231,10 +365,19 @@ void become_nonmaster(struct subnet_record *d, struct work_record *work,
work->ServerType = new_server_type;
if (!(work->ServerType & SV_TYPE_DOMAIN_MASTER))
+ {
+ if (work->state == MST_DOMAIN)
+ work->state = MST_BROWSER;
remove_name_entry(d,work->work_group,0x1b);
+
+ }
if (!(work->ServerType & SV_TYPE_DOMAIN_MASTER))
+ {
+ if (work->state >= MST_BROWSER)
+ work->state = MST_NONE;
remove_name_entry(d,work->work_group,0x1d);
+ }
}
@@ -270,6 +413,8 @@ void run_elections(void)
work->work_group,inet_ntoa(d->bcast_ip)));
work->RunningElection = False;
+ work->state = MST_NONE;
+
become_master(d, work);
}
}
@@ -340,6 +485,7 @@ void process_election(struct packet_struct *p,char *buf)
{
work->needelection = True;
work->ElectionCount=0;
+ work->state = MST_NONE;
}
}
else
generated by cgit (git 2.34.1) at 2024-08-17 11:14:31 +0000