--- /dev/null
+/*
+ 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
+
+ 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
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ 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.
+
+*/
+
+#include "includes.h"
+
+extern BOOL found_lm_clients;
+
+#if 0
+
+/* XXXX note: This function is currently unsuitable for use, as it
+ does not properly check that a server is in a fit state to become
+ a backup browser before asking it to be one.
+ The code is left here to be worked on at a later date.
+*/
+
+/****************************************************************************
+Tell a server to become a backup browser
+**************************************************************************/
+
+void tell_become_backup(void)
+{
+ 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)
+ {
+ struct server_record *servrec;
+ int num_servers = 0;
+ int num_backups = 0;
+
+ for (servrec = work->serverlist; servrec; servrec = servrec->next)
+ {
+ num_servers++;
+
+ if (is_myname(servrec->serv.name))
+ continue;
+
+ if (servrec->serv.type & SV_TYPE_BACKUP_BROWSER)
+ {
+ num_backups++;
+ continue;
+ }
+
+ if (servrec->serv.type & SV_TYPE_MASTER_BROWSER)
+ continue;
+
+ if (!(servrec->serv.type & SV_TYPE_POTENTIAL_BROWSER))
+ continue;
+
+ DEBUG(3,("num servers: %d num backups: %d\n",
+ num_servers, num_backups));
+
+ /* make first server a backup server. thereafter make every
+ tenth server a backup server */
+ if (num_backups != 0 && (num_servers+9) / num_backups > 10)
+ continue;
+
+ DEBUG(2,("sending become backup to %s %s for %s\n",
+ servrec->serv.name, inet_ntoa(subrec->bcast_ip),
+ work->work_group));
+
+ /* type 11 request from MYNAME(20) to WG(1e) for SERVER */
+ do_announce_request(servrec->serv.name, work->work_group,
+ ANN_BecomeBackup, 0x20, 0x1e, subrec->bcast_ip);
+ }
+ }
+ }
+}
+#endif
+
+/*******************************************************************
+ Process an incoming host announcement packet.
+*******************************************************************/
+
+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);
+ comment[42] = 0;
+
+ 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);
+}
+
+/*******************************************************************
+ Process an incoming WORKGROUP announcement packet.
+*******************************************************************/
+
+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);
+}
+
+/*******************************************************************
+ Process an incoming local master browser announcement packet.
+*******************************************************************/
+
+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);
+ comment[42] = 0;
+ 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);
+}
+
+/*******************************************************************
+ Process a domain master announcement frame.
+ Domain master browsers receive these from local masters. The Domain
+ master should then issue a sync with the local master, asking for
+ that machines local server list.
+******************************************************************/
+
+void process_master_browser_announce(struct subnet_record *subrec,
+ struct packet_struct *p,char *buf)
+{
+ unstring local_master_name;
+ struct work_record *work;
+ struct browse_cache_record *browrec;
+
+ START_PROFILE(master_browser_announce);
+
+ pull_ascii_nstring(local_master_name,sizeof(local_master_name),buf);
+
+ DEBUG(3,("process_master_browser_announce: Local master announce from %s IP %s.\n",
+ local_master_name, inet_ntoa(p->ip)));
+
+ if (!lp_domain_master()) {
+ DEBUG(0,("process_master_browser_announce: Not configured as domain \
+master - ignoring master announce.\n"));
+ goto done;
+ }
+
+ if((work = find_workgroup_on_subnet(subrec, lp_workgroup())) == NULL) {
+ DEBUG(0,("process_master_browser_announce: Cannot find workgroup %s on subnet %s\n",
+ lp_workgroup(), subrec->subnet_name));
+ goto done;
+ }
+
+ if(!AM_DOMAIN_MASTER_BROWSER(work)) {
+ DEBUG(0,("process_master_browser_announce: Local master announce made to us from \
+%s IP %s and we are not a domain master browser.\n", local_master_name, inet_ntoa(p->ip)));
+ goto done;
+ }
+
+ /* Add this host as a local master browser entry on the browse lists.
+ This causes a sync request to be made to it at a later date.
+ */
+
+ if((browrec = find_browser_in_lmb_cache( local_master_name )) == NULL) {
+ /* Add it. */
+ create_browser_in_lmb_cache( work->work_group, local_master_name, p->ip);
+ } else {
+ update_browser_death_time(browrec);
+ }
+
+done:
+
+ END_PROFILE(master_browser_announce);
+}
+
+/*******************************************************************
+ Process an incoming LanMan host announcement packet.
+*******************************************************************/
+
+void process_lm_host_announce(struct subnet_record *subrec, struct packet_struct *p, char *buf)
+{
+ struct dgram_packet *dgram = &p->packet.dgram;
+ uint32 servertype = IVAL(buf,1);
+ int osmajor=CVAL(buf,5); /* major version of node software */
+ int osminor=CVAL(buf,6); /* minor version of node software */
+ int ttl = SVAL(buf,7);
+ unstring announce_name;
+ struct work_record *work;
+ struct server_record *servrec;
+ unstring work_name;
+ unstring source_name;
+ fstring comment;
+ char *s = buf+9;
+
+ START_PROFILE(lm_host_announce);
+ s = skip_string(s,1);
+ pull_ascii(comment, s, sizeof(fstring), 43, STR_TERMINATE);
+
+ pull_ascii_nstring(announce_name,sizeof(announce_name),buf+9);
+ pull_ascii_nstring(source_name,sizeof(source_name),dgram->source_name.name);
+ /* For a LanMan host announce the workgroup name is the destination name. */
+ pull_ascii_nstring(work_name,sizeof(work_name),dgram->dest_name.name);
+
+ DEBUG(3,("process_lm_host_announce: LM Announcement from %s IP %s to \
+%s for server %s.\n", nmb_namestr(&dgram->source_name), inet_ntoa(p->ip),
+ nmb_namestr(&dgram->dest_name),announce_name));
+
+ DEBUG(5,("process_lm_host_announce: os=(%d,%d) ttl=%d server type=%08x comment=%s\n",
+ osmajor, osminor, ttl, servertype,comment));
+
+ if ((osmajor < 36) || (osmajor > 38) || (osminor !=0)) {
+ DEBUG(5,("process_lm_host_announce: LM Announcement packet does not \
+originate from OS/2 Warp client. Ignoring packet.\n"));
+ /* Could have been from a Windows machine (with its LM Announce enabled),
+ or a Samba server. Then don't disrupt the current browse list. */
+ goto done;
+ }
+
+ /* Filter servertype to remove impossible bits. */
+ servertype &= ~(SV_TYPE_LOCAL_LIST_ONLY|SV_TYPE_DOMAIN_ENUM);
+
+ /* A LanMan host announcement must be sent to the name WORKGROUP<00>. */
+ if(dgram->dest_name.name_type != 0x00) {
+ DEBUG(2,("process_lm_host_announce: incorrect name type for destination from IP %s \
+(was %02x) should be 0x00. Allowing packet anyway.\n",
+ inet_ntoa(p->ip), dgram->dest_name.name_type));
+ /* Change it so it was. */
+ dgram->dest_name.name_type = 0x00;
+ }
+
+ /*
+ * 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. This code is probably
+ * not needed in the LanMan announce code, but it won't hurt.
+ */
+
+ 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;
+ found_lm_clients = True;
+
+done:
+
+ END_PROFILE(lm_host_announce);
+}
+
+/****************************************************************************
+ Send a backup list response.
+*****************************************************************************/
+
+static void send_backup_list_response(struct subnet_record *subrec,
+ struct work_record *work,
+ struct nmb_name *send_to_name,
+ unsigned char max_number_requested,
+ uint32 token, struct in_addr sendto_ip,
+ int port)
+{
+ char outbuf[1024];
+ char *p, *countptr;
+ unsigned int count = 0;
+ unstring send_to_namestr;
+#if 0
+ struct server_record *servrec;
+#endif
+ unstring myname;
+
+ memset(outbuf,'\0',sizeof(outbuf));
+
+ DEBUG(3,("send_backup_list_response: sending backup list for workgroup %s to %s IP %s\n",
+ work->work_group, nmb_namestr(send_to_name), inet_ntoa(sendto_ip)));
+
+ p = outbuf;
+
+ SCVAL(p,0,ANN_GetBackupListResp); /* Backup list response opcode. */
+ p++;
+
+ countptr = p;
+ p++;
+
+ SIVAL(p,0,token); /* The sender's unique info. */
+ p += 4;
+
+ /* We always return at least one name - our own. */
+ count = 1;
+ unstrcpy(myname, global_myname());
+ strupper_m(myname);
+ myname[15]='\0';
+ push_pstring_base(p, myname, outbuf);
+
+ p = skip_string(p,1);
+
+ /* Look for backup browsers in this workgroup. */
+
+#if 0
+ /* we don't currently send become_backup requests so we should never
+ send any other servers names out as backups for our
+ workgroup. That's why this is commented out (tridge) */
+
+ /*
+ * NB. Note that the struct work_record here is not neccessarily
+ * attached to the subnet *subrec.
+ */
+
+ for (servrec = work->serverlist; servrec; servrec = servrec->next)
+ {
+ int len = PTR_DIFF(p, outbuf);
+ if((sizeof(outbuf) - len) < 16)
+ break;
+
+ if(count >= (unsigned int)max_number_requested)
+ break;
+
+ if(strnequal(servrec->serv.name, global_myname(),15))
+ continue;
+
+ if(!(servrec->serv.type & SV_TYPE_BACKUP_BROWSER))
+ continue;
+
+ StrnCpy(p, servrec->serv.name, 15);
+ strupper_m(p);
+ count++;
+
+ DEBUG(5,("send_backup_list_response: Adding server %s number %d\n",
+ p, count));
+
+ p = skip_string(p,1);
+ }
+#endif
+
+ SCVAL(countptr, 0, count);
+
+ pull_ascii_nstring(send_to_namestr, sizeof(send_to_namestr), send_to_name->name);
+
+ DEBUG(4,("send_backup_list_response: sending response to %s<00> IP %s with %d servers.\n",
+ send_to_namestr, inet_ntoa(sendto_ip), count));
+
+ send_mailslot(True, BROWSE_MAILSLOT,
+ outbuf,PTR_DIFF(p,outbuf),
+ global_myname(), 0,
+ send_to_namestr,0,
+ sendto_ip, subrec->myip, port);
+}
+
+/*******************************************************************
+ Process a send backup list request packet.
+
+ A client sends a backup list request to ask for a list of servers on
+ the net that maintain server lists for a domain. A server is then
+ chosen from this list to send NetServerEnum commands to to list
+ available servers.
+
+********************************************************************/
+
+void process_get_backup_list_request(struct subnet_record *subrec,
+ struct packet_struct *p,char *buf)
+{
+ struct dgram_packet *dgram = &p->packet.dgram;
+ struct work_record *work;
+ unsigned char max_number_requested = CVAL(buf,0);
+ uint32 token = IVAL(buf,1); /* Sender's key index for the workgroup. */
+ int name_type = dgram->dest_name.name_type;
+ unstring workgroup_name;
+ struct subnet_record *search_subrec = subrec;
+
+ START_PROFILE(get_backup_list);
+ pull_ascii_nstring(workgroup_name, sizeof(workgroup_name), dgram->dest_name.name);
+
+ DEBUG(3,("process_get_backup_list_request: request from %s IP %s to %s.\n",
+ nmb_namestr(&dgram->source_name), inet_ntoa(p->ip),
+ nmb_namestr(&dgram->dest_name)));
+
+ /* We have to be a master browser, or a domain master browser
+ for the requested workgroup. That means it must be our
+ workgroup. */
+
+ if(strequal(workgroup_name, lp_workgroup()) == False) {
+ DEBUG(7,("process_get_backup_list_request: Ignoring announce request for workgroup %s.\n",
+ workgroup_name));
+ goto done;
+ }
+
+ if((work = find_workgroup_on_subnet(search_subrec, workgroup_name)) == NULL) {
+ DEBUG(0,("process_get_backup_list_request: Cannot find workgroup %s on \
+subnet %s.\n", workgroup_name, search_subrec->subnet_name));
+ goto done;
+ }
+
+ /*
+ * If the packet was sent to WORKGROUP<1b> instead
+ * of WORKGROUP<1d> then it was unicast to us a domain master
+ * browser. Change search subrec to unicast.
+ */
+
+ if(name_type == 0x1b) {
+ /* We must be a domain master browser in order to
+ process this packet. */
+
+ if(!AM_DOMAIN_MASTER_BROWSER(work)) {
+ DEBUG(0,("process_get_backup_list_request: domain list requested for workgroup %s \
+and I am not a domain master browser.\n", workgroup_name));
+ goto done;
+ }
+
+ search_subrec = unicast_subnet;
+ } else if (name_type == 0x1d) {
+ /* We must be a local master browser in order to process this packet. */
+
+ if(!AM_LOCAL_MASTER_BROWSER(work)) {
+ DEBUG(0,("process_get_backup_list_request: domain list requested for workgroup %s \
+and I am not a local master browser.\n", workgroup_name));
+ goto done;
+ }
+ } else {
+ DEBUG(0,("process_get_backup_list_request: Invalid name type %x - should be 0x1b or 0x1d.\n",
+ name_type));
+ goto done;
+ }
+
+ send_backup_list_response(subrec, work, &dgram->source_name,
+ max_number_requested, token, p->ip, p->port);
+
+done:
+
+ END_PROFILE(get_backup_list);
+}
+
+/*******************************************************************
+ Process a reset browser state packet.
+
+ Diagnostic packet:
+ 0x1 - Stop being a master browser and become a backup browser.
+ 0x2 - Discard browse lists, stop being a master browser, try again.
+ 0x4 - Stop being a master browser forever.
+
+******************************************************************/
+
+void process_reset_browser(struct subnet_record *subrec,
+ struct packet_struct *p,char *buf)
+{
+ struct dgram_packet *dgram = &p->packet.dgram;
+ int state = CVAL(buf,0);
+ struct subnet_record *sr;
+
+ START_PROFILE(reset_browser);
+
+ DEBUG(1,("process_reset_browser: received diagnostic browser reset \
+request from %s IP %s state=0x%X\n",
+ nmb_namestr(&dgram->source_name), inet_ntoa(p->ip), state));
+
+ /* Stop being a local master browser on all our broadcast subnets. */
+ if (state & 0x1) {
+ for (sr = FIRST_SUBNET; sr; sr = NEXT_SUBNET_EXCLUDING_UNICAST(sr)) {
+ struct work_record *work;
+ for (work = sr->workgrouplist; work; work = work->next) {
+ if (AM_LOCAL_MASTER_BROWSER(work))
+ unbecome_local_master_browser(sr, work, True);
+ }
+ }
+ }
+
+ /* Discard our browse lists. */
+ if (state & 0x2) {
+ /*
+ * Calling expire_workgroups_and_servers with a -1
+ * time causes all servers not marked with a PERMANENT_TTL
+ * on the workgroup lists to be discarded, and all
+ * workgroups with empty server lists to be discarded.
+ * This means we keep our own server names and workgroup
+ * as these have a PERMANENT_TTL.
+ */
+
+ expire_workgroups_and_servers(-1);
+ }
+
+ /* Request to stop browsing altogether. */
+ if (state & 0x4)
+ DEBUG(1,("process_reset_browser: ignoring request to stop being a browser.\n"));
+
+ END_PROFILE(reset_browser);
+}
+
+/*******************************************************************
+ Process an announcement request packet.
+ We don't respond immediately, we just check it's a request for
+ our workgroup and then set the flag telling the announce code
+ in nmbd_sendannounce.c:announce_my_server_names that an
+ announcement is needed soon.
+******************************************************************/
+
+void process_announce_request(struct subnet_record *subrec, struct packet_struct *p, char *buf)
+{
+ struct dgram_packet *dgram = &p->packet.dgram;
+ struct work_record *work;
+ unstring workgroup_name;
+
+ START_PROFILE(announce_request);
+
+ pull_ascii_nstring(workgroup_name, sizeof(workgroup_name), dgram->dest_name.name);
+ DEBUG(3,("process_announce_request: Announce request from %s IP %s to %s.\n",
+ nmb_namestr(&dgram->source_name), inet_ntoa(p->ip),
+ nmb_namestr(&dgram->dest_name)));
+
+ /* We only send announcement requests on our workgroup. */
+ if(strequal(workgroup_name, lp_workgroup()) == False) {
+ DEBUG(7,("process_announce_request: Ignoring announce request for workgroup %s.\n",
+ workgroup_name));
+ goto done;
+ }
+
+ if((work = find_workgroup_on_subnet(subrec, workgroup_name)) == NULL) {
+ DEBUG(0,("process_announce_request: Unable to find workgroup %s on subnet !\n",
+ workgroup_name));
+ goto done;
+ }
+
+ work->needannounce = True;
+done:
+
+ END_PROFILE(lm_host_announce);
+}
+
+/*******************************************************************
+ Process a LanMan announcement request packet.
+ We don't respond immediately, we just check it's a request for
+ our workgroup and then set the flag telling that we have found
+ a LanMan client (DOS or OS/2) and that we will have to start
+ sending LanMan announcements (unless specifically disabled
+ through the "lm announce" parameter in smb.conf)
+******************************************************************/
+
+void process_lm_announce_request(struct subnet_record *subrec, struct packet_struct *p, char *buf)
+{
+ struct dgram_packet *dgram = &p->packet.dgram;
+ unstring workgroup_name;
+
+ START_PROFILE(lm_announce_request);
+
+ pull_ascii_nstring(workgroup_name, sizeof(workgroup_name), dgram->dest_name.name);
+ DEBUG(3,("process_lm_announce_request: Announce request from %s IP %s to %s.\n",
+ nmb_namestr(&dgram->source_name), inet_ntoa(p->ip),
+ nmb_namestr(&dgram->dest_name)));
+
+ /* We only send announcement requests on our workgroup. */
+ if(strequal(workgroup_name, lp_workgroup()) == False) {
+ DEBUG(7,("process_lm_announce_request: Ignoring announce request for workgroup %s.\n",
+ workgroup_name));
+ goto done;
+ }
+
+ if(find_workgroup_on_subnet(subrec, workgroup_name) == NULL) {
+ DEBUG(0,("process_announce_request: Unable to find workgroup %s on subnet !\n",
+ workgroup_name));
+ goto done;
+ }
+
+ found_lm_clients = True;
+
+done:
+
+ END_PROFILE(lm_host_announce);
+}
projects / samba / blobdiff