/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ Unix SMB/CIFS implementation.
NBT netbios routines and daemon - version 2
Copyright (C) Andrew Tridgell 1994-1998
Copyright (C) Luke Kenneth Casson Leighton 1994-1998
- Copyright (C) Jeremy Allison 1994-1998
+ Copyright (C) Jeremy Allison 1994-2003
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
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
-extern int DEBUGLEVEL;
-
-extern pstring global_myname;
-extern fstring global_myworkgroup;
-
/* Election parameters. */
extern time_t StartupTime;
/****************************************************************************
Send an election datagram packet.
**************************************************************************/
-static void send_election_dgram(struct subnet_record *subrec, char *workgroup_name,
- uint32 criterion, int timeup,char *server_name)
+
+static void send_election_dgram(struct subnet_record *subrec, const char *workgroup_name,
+ uint32 criterion, int timeup,const char *server_name)
{
- pstring outbuf;
- char *p;
-
- DEBUG(2,("send_election_dgram: Sending election packet for workgroup %s on subnet %s\n",
- workgroup_name, subrec->subnet_name ));
-
- memset(outbuf,'\0',sizeof(outbuf));
- p = outbuf;
- CVAL(p,0) = ANN_Election; /* Election opcode. */
- p++;
-
- CVAL(p,0) = (criterion == 0 && timeup == 0) ? 0 : ELECTION_VERSION;
- SIVAL(p,1,criterion);
- SIVAL(p,5,timeup*1000); /* ms - Despite what the spec says. */
- p += 13;
- pstrcpy(p,server_name);
- strupper(p);
- p = skip_string(p,1);
+ pstring outbuf;
+ unstring srv_name;
+ char *p;
+
+ DEBUG(2,("send_election_dgram: Sending election packet for workgroup %s on subnet %s\n",
+ workgroup_name, subrec->subnet_name ));
+
+ memset(outbuf,'\0',sizeof(outbuf));
+ p = outbuf;
+ SCVAL(p,0,ANN_Election); /* Election opcode. */
+ p++;
+
+ SCVAL(p,0,((criterion == 0 && timeup == 0) ? 0 : ELECTION_VERSION));
+ SIVAL(p,1,criterion);
+ SIVAL(p,5,timeup*1000); /* ms - Despite what the spec says. */
+ p += 13;
+ unstrcpy(srv_name, server_name);
+ strupper_m(srv_name);
+ /* The following call does UNIX -> DOS charset conversion. */
+ pstrcpy_base(p, srv_name, outbuf);
+ p = skip_string(outbuf,sizeof(outbuf),p);
- send_mailslot(False, BROWSE_MAILSLOT, outbuf, PTR_DIFF(p,outbuf),
- global_myname, 0,
- workgroup_name, 0x1e,
- subrec->bcast_ip, subrec->myip, DGRAM_PORT);
+ send_mailslot(False, BROWSE_MAILSLOT, outbuf, PTR_DIFF(p,outbuf),
+ global_myname(), 0,
+ workgroup_name, 0x1e,
+ subrec->bcast_ip, subrec->myip, DGRAM_PORT);
}
/*******************************************************************
struct nmb_name *answer_name,
struct in_addr answer_ip, struct res_rec *rrec)
{
- DEBUG(3,("check_for_master_browser_success: Local master browser for workgroup %s exists at \
-IP %s (just checking).\n", answer_name->name, inet_ntoa(answer_ip) ));
+ unstring aname;
+ pull_ascii_nstring(aname, sizeof(aname), answer_name->name);
+ DEBUG(3,("check_for_master_browser_success: Local master browser for workgroup %s exists at \
+IP %s (just checking).\n", aname, inet_ntoa(answer_ip) ));
}
/*******************************************************************
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, "");
- }
- }
+ unstring workgroup_name;
+ struct work_record *work;
+
+ pull_ascii_nstring(workgroup_name,sizeof(workgroup_name),question_name->name);
+
+ 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, lp_workgroup())) {
+
+ 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 check_master_browser_exists(time_t t)
{
- static time_t lastrun=0;
- struct subnet_record *subrec;
- char *workgroup_name = global_myworkgroup;
-
- if (!lastrun)
- lastrun = t;
-
- if (t < (lastrun + (CHECK_TIME_MST_BROWSE * 60)))
- return;
-
- lastrun = t;
-
- dump_workgroups(False);
-
- for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec))
- {
- struct work_record *work;
-
- for (work = subrec->workgrouplist; work; work = work->next)
- {
- if (strequal(work->work_group, workgroup_name) && !AM_LOCAL_MASTER_BROWSER(work))
- {
- /* Do a name query for the local master browser on this net. */
- query_name( subrec, work->work_group, 0x1d,
- check_for_master_browser_success,
- check_for_master_browser_fail,
- NULL);
- }
- }
- }
+ static time_t lastrun=0;
+ struct subnet_record *subrec;
+ const char *workgroup_name = lp_workgroup();
+
+ if (!lastrun)
+ lastrun = t;
+
+ if (t < (lastrun + (CHECK_TIME_MST_BROWSE * 60)))
+ return;
+
+ lastrun = t;
+
+ dump_workgroups(False);
+
+ for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) {
+ struct work_record *work;
+
+ for (work = subrec->workgrouplist; work; work = work->next) {
+ if (strequal(work->work_group, workgroup_name) && !AM_LOCAL_MASTER_BROWSER(work)) {
+ /* Do a name query for the local master browser on this net. */
+ query_name( subrec, work->work_group, 0x1d,
+ check_for_master_browser_success,
+ check_for_master_browser_fail,
+ NULL);
+ }
+ }
+ }
}
/*******************************************************************
void run_elections(time_t t)
{
- static time_t lastime = 0;
+ static time_t lastime = 0;
- struct subnet_record *subrec;
+ struct subnet_record *subrec;
- /* Send election packets once every 2 seconds - note */
- if (lastime && (t - lastime < 2))
- return;
+ START_PROFILE(run_elections);
+
+ /* Send election packets once every 2 seconds - note */
+ if (lastime && (t - lastime < 2)) {
+ END_PROFILE(run_elections);
+ return;
+ }
- lastime = t;
+ lastime = t;
- for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec))
- {
- struct work_record *work;
-
- for (work = subrec->workgrouplist; work; work = work->next)
- {
- if (work->RunningElection)
- {
- /*
- * We can only run an election for a workgroup if we have
- * registered the WORKGROUP<1e> name, as that's the name
- * we must listen to.
- */
- struct nmb_name nmbname;
-
- make_nmb_name(&nmbname, work->work_group, 0x1e);
- if(find_name_on_subnet( subrec, &nmbname, FIND_SELF_NAME)==NULL) {
- DEBUG(8,("run_elections: Cannot send election packet yet as name %s not \
+ for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) {
+ struct work_record *work;
+
+ for (work = subrec->workgrouplist; work; work = work->next) {
+ if (work->RunningElection) {
+ /*
+ * We can only run an election for a workgroup if we have
+ * registered the WORKGROUP<1e> name, as that's the name
+ * we must listen to.
+ */
+ struct nmb_name nmbname;
+
+ make_nmb_name(&nmbname, work->work_group, 0x1e);
+ if(find_name_on_subnet( subrec, &nmbname, FIND_SELF_NAME)==NULL) {
+ DEBUG(8,("run_elections: Cannot send election packet yet as name %s not \
yet registered on subnet %s\n", nmb_namestr(&nmbname), subrec->subnet_name ));
- continue;
- }
+ continue;
+ }
- send_election_dgram(subrec, work->work_group, work->ElectionCriterion,
- t - StartupTime, global_myname);
+ send_election_dgram(subrec, work->work_group, work->ElectionCriterion,
+ t - StartupTime, global_myname());
- if (work->ElectionCount++ >= 4)
- {
- /* Won election (4 packets were sent out uncontested. */
- DEBUG(2,("run_elections: >>> Won election for workgroup %s on subnet %s <<<\n",
- work->work_group, subrec->subnet_name ));
-
- work->RunningElection = False;
-
- become_local_master_browser(subrec, work);
- }
- }
- }
- }
+ if (work->ElectionCount++ >= 4) {
+ /* Won election (4 packets were sent out uncontested. */
+ DEBUG(2,("run_elections: >>> Won election for workgroup %s on subnet %s <<<\n",
+ work->work_group, subrec->subnet_name ));
+
+ work->RunningElection = False;
+
+ become_local_master_browser(subrec, work);
+ }
+ }
+ }
+ }
+ END_PROFILE(run_elections);
}
/*******************************************************************
Determine if I win an election.
******************************************************************/
-static BOOL win_election(struct work_record *work, int version,
- uint32 criterion, int timeup, char *server_name)
+static bool win_election(struct work_record *work, int version,
+ uint32 criterion, int timeup, const char *server_name)
{
- int mytimeup = time(NULL) - StartupTime;
- uint32 mycriterion = work->ElectionCriterion;
-
- /* If local master is false then never win
- in election broadcasts. */
- if(!lp_local_master())
- {
- DEBUG(3,("win_election: Losing election as local master == False\n"));
- return False;
- }
+ int mytimeup = time(NULL) - StartupTime;
+ uint32 mycriterion = work->ElectionCriterion;
+
+ /* If local master is false then never win in election broadcasts. */
+ if(!lp_local_master()) {
+ DEBUG(3,("win_election: Losing election as local master == False\n"));
+ return False;
+ }
- DEBUG(4,("win_election: election comparison: %x:%x %x:%x %d:%d %s:%s\n",
- version, ELECTION_VERSION,
- criterion, mycriterion,
- timeup, mytimeup,
- server_name, global_myname));
-
- if (version > ELECTION_VERSION)
- return(False);
- if (version < ELECTION_VERSION)
- return(True);
+ DEBUG(4,("win_election: election comparison: %x:%x %x:%x %d:%d %s:%s\n",
+ version, ELECTION_VERSION,
+ criterion, mycriterion,
+ timeup, mytimeup,
+ server_name, global_myname()));
+
+ if (version > ELECTION_VERSION)
+ return(False);
+ if (version < ELECTION_VERSION)
+ return(True);
- if (criterion > mycriterion)
- return(False);
- if (criterion < mycriterion)
- return(True);
-
- if (timeup > mytimeup)
- return(False);
- if (timeup < mytimeup)
- return(True);
-
- if (strcasecmp(global_myname, server_name) > 0)
- return(False);
+ if (criterion > mycriterion)
+ return(False);
+ if (criterion < mycriterion)
+ return(True);
+
+ if (timeup > mytimeup)
+ return(False);
+ if (timeup < mytimeup)
+ return(True);
+
+ if (StrCaseCmp(global_myname(), server_name) > 0)
+ return(False);
- return(True);
+ return(True);
}
/*******************************************************************
void process_election(struct subnet_record *subrec, struct packet_struct *p, char *buf)
{
- struct dgram_packet *dgram = &p->packet.dgram;
- int version = CVAL(buf,0);
- uint32 criterion = IVAL(buf,1);
- int timeup = IVAL(buf,5)/1000;
- char *server_name = buf+13;
- struct work_record *work;
- char *workgroup_name = dgram->dest_name.name;
-
- server_name[15] = 0;
-
- DEBUG(3,("process_election: Election request from %s at IP %s on subnet %s for workgroup %s.\n",
- server_name,inet_ntoa(p->ip), subrec->subnet_name, workgroup_name ));
-
- DEBUG(5,("process_election: vers=%d criterion=%08x timeup=%d\n", version,criterion,timeup));
-
- if(( work = find_workgroup_on_subnet(subrec, workgroup_name)) == NULL)
- {
- DEBUG(0,("process_election: Cannot find workgroup %s on subnet %s.\n",
- workgroup_name, subrec->subnet_name ));
- return;
- }
-
- if (!strequal(work->work_group, global_myworkgroup))
- {
- DEBUG(3,("process_election: ignoring election request for workgroup %s on subnet %s as this \
+ struct dgram_packet *dgram = &p->packet.dgram;
+ int version = CVAL(buf,0);
+ uint32 criterion = IVAL(buf,1);
+ int timeup = IVAL(buf,5)/1000;
+ unstring server_name;
+ struct work_record *work;
+ unstring workgroup_name;
+
+ START_PROFILE(election);
+
+ pull_ascii_nstring(server_name, sizeof(server_name), buf+13);
+ pull_ascii_nstring(workgroup_name, sizeof(workgroup_name), dgram->dest_name.name);
+
+ server_name[15] = 0;
+
+ DEBUG(3,("process_election: Election request from %s at IP %s on subnet %s for workgroup %s.\n",
+ server_name,inet_ntoa(p->ip), subrec->subnet_name, workgroup_name ));
+
+ DEBUG(5,("process_election: vers=%d criterion=%08x timeup=%d\n", version,criterion,timeup));
+
+ if(( work = find_workgroup_on_subnet(subrec, workgroup_name)) == NULL) {
+ DEBUG(0,("process_election: Cannot find workgroup %s on subnet %s.\n",
+ workgroup_name, subrec->subnet_name ));
+ goto done;
+ }
+
+ if (!strequal(work->work_group, lp_workgroup())) {
+ DEBUG(3,("process_election: ignoring election request for workgroup %s on subnet %s as this \
is not my workgroup.\n", work->work_group, subrec->subnet_name ));
- return;
- }
-
- if (win_election(work, version,criterion,timeup,server_name))
- {
- /* We take precedence over the requesting server. */
- if (!work->RunningElection)
- {
- /* We weren't running an election - start running one. */
-
- work->needelection = True;
- work->ElectionCount=0;
- }
-
- /* Note that if we were running an election for this workgroup on this
- subnet already, we just ignore the server we take precedence over. */
- }
- else
- {
- /* We lost. Stop participating. */
- work->needelection = False;
-
- if (work->RunningElection || AM_LOCAL_MASTER_BROWSER(work))
- {
- work->RunningElection = False;
- DEBUG(3,("process_election: >>> Lost election for workgroup %s on subnet %s <<<\n",
- work->work_group, subrec->subnet_name ));
- if (AM_LOCAL_MASTER_BROWSER(work))
- unbecome_local_master_browser(subrec, work, False);
- }
- }
+ goto done;
+ }
+
+ if (win_election(work, version,criterion,timeup,server_name)) {
+ /* We take precedence over the requesting server. */
+ if (!work->RunningElection) {
+ /* We weren't running an election - start running one. */
+
+ work->needelection = True;
+ work->ElectionCount=0;
+ }
+
+ /* Note that if we were running an election for this workgroup on this
+ subnet already, we just ignore the server we take precedence over. */
+ } else {
+ /* We lost. Stop participating. */
+ work->needelection = False;
+
+ if (work->RunningElection || AM_LOCAL_MASTER_BROWSER(work)) {
+ work->RunningElection = False;
+ DEBUG(3,("process_election: >>> Lost election for workgroup %s on subnet %s <<<\n",
+ work->work_group, subrec->subnet_name ));
+ if (AM_LOCAL_MASTER_BROWSER(work))
+ unbecome_local_master_browser(subrec, work, False);
+ }
+ }
+done:
+
+ END_PROFILE(election);
}
/****************************************************************************
be done by run_elections().
***************************************************************************/
-BOOL check_elections(void)
+bool check_elections(void)
{
- struct subnet_record *subrec;
- BOOL run_any_election = False;
-
- for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec))
- {
- struct work_record *work;
- for (work = subrec->workgrouplist; work; work = work->next)
- {
- run_any_election |= work->RunningElection;
-
- /*
- * Start an election if we have any chance of winning.
- * Note this is a change to the previous code, that would
- * only run an election if nmbd was in the potential browser
- * state. We need to run elections in any state if we're told
- * to. JRA.
- */
-
- if (work->needelection && !work->RunningElection && lp_local_master())
- {
- /*
- * We can only run an election for a workgroup if we have
- * registered the WORKGROUP<1e> name, as that's the name
- * we must listen to.
- */
- struct nmb_name nmbname;
-
- make_nmb_name(&nmbname, work->work_group, 0x1e);
- if(find_name_on_subnet( subrec, &nmbname, FIND_SELF_NAME)==NULL) {
- DEBUG(8,("check_elections: Cannot send election packet yet as name %s not \
+ struct subnet_record *subrec;
+ bool run_any_election = False;
+
+ for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) {
+ struct work_record *work;
+ for (work = subrec->workgrouplist; work; work = work->next) {
+ run_any_election |= work->RunningElection;
+
+ /*
+ * Start an election if we have any chance of winning.
+ * Note this is a change to the previous code, that would
+ * only run an election if nmbd was in the potential browser
+ * state. We need to run elections in any state if we're told
+ * to. JRA.
+ */
+
+ if (work->needelection && !work->RunningElection && lp_local_master()) {
+ /*
+ * We can only run an election for a workgroup if we have
+ * registered the WORKGROUP<1e> name, as that's the name
+ * we must listen to.
+ */
+ struct nmb_name nmbname;
+
+ make_nmb_name(&nmbname, work->work_group, 0x1e);
+ if(find_name_on_subnet( subrec, &nmbname, FIND_SELF_NAME)==NULL) {
+ DEBUG(8,("check_elections: Cannot send election packet yet as name %s not \
yet registered on subnet %s\n", nmb_namestr(&nmbname), subrec->subnet_name ));
- continue;
- }
-
- DEBUG(3,("check_elections: >>> Starting election for workgroup %s on subnet %s <<<\n",
- work->work_group, subrec->subnet_name ));
-
- work->ElectionCount = 0;
- work->RunningElection = True;
- work->needelection = False;
- }
- }
- }
- return run_any_election;
+ continue;
+ }
+
+ DEBUG(3,("check_elections: >>> Starting election for workgroup %s on subnet %s <<<\n",
+ work->work_group, subrec->subnet_name ));
+
+ work->ElectionCount = 0;
+ work->RunningElection = True;
+ work->needelection = False;
+ }
+ }
+ }
+ return run_any_election;
+}
+
+/****************************************************************************
+ Process a internal Samba message forcing an election.
+***************************************************************************/
+
+void nmbd_message_election(struct messaging_context *msg,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id server_id,
+ DATA_BLOB *data)
+{
+ struct subnet_record *subrec;
+
+ for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) {
+ struct work_record *work;
+ for (work = subrec->workgrouplist; work; work = work->next) {
+ if (strequal(work->work_group, lp_workgroup())) {
+ work->needelection = True;
+ work->ElectionCount=0;
+ work->mst_state = lp_local_master() ? MST_POTENTIAL : MST_NONE;
+ }
+ }
+ }
}
git.samba.org / nivanova / samba-autobuild / .git / blobdiff