/* 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 3 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, see . */ #include "includes.h" #include "../librpc/gen_ndr/svcctl.h" #include "nmbd/nmbd.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, const char *buf) { struct dgram_packet *dgram = &p->packet.dgram; int ttl = IVAL(buf,1)/1000; unstring announce_name; uint32_t servertype = IVAL(buf,23); fstring comment; struct work_record *work; struct server_record *servrec; unstring work_name; unstring source_name; 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, lp_netbios_name())) 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); strlcpy(servrec->serv.comment,comment,sizeof(servrec->serv.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: return; } /******************************************************************* Process an incoming WORKGROUP announcement packet. *******************************************************************/ void process_workgroup_announce(struct subnet_record *subrec, struct packet_struct *p, const char *buf) { struct dgram_packet *dgram = &p->packet.dgram; int ttl = IVAL(buf,1)/1000; unstring workgroup_announce_name; unstring master_name; uint32_t servertype = IVAL(buf,23); struct work_record *work; unstring source_name; unstring dest_name; 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: return; } /******************************************************************* Process an incoming local master browser announcement packet. *******************************************************************/ void process_local_master_announce(struct subnet_record *subrec, struct packet_struct *p, const char *buf) { struct dgram_packet *dgram = &p->packet.dgram; int ttl = IVAL(buf,1)/1000; unstring server_name; uint32_t servertype = IVAL(buf,23); fstring comment; unstring work_name; struct work_record *work = NULL; struct server_record *servrec; unstring source_name; 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); strlcpy(servrec->serv.comment,comment,sizeof(servrec->serv.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) && ((servrec = find_server_in_workgroup( work, server_name))!=NULL)) { remove_server_from_workgroup( work, servrec); } } subrec->work_changed = True; done: return; } /******************************************************************* 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,const char *buf) { unstring local_master_name; struct work_record *work; struct browse_cache_record *browrec; 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: return; } /******************************************************************* Process an incoming LanMan host announcement packet. *******************************************************************/ void process_lm_host_announce(struct subnet_record *subrec, struct packet_struct *p, const char *buf, int len) { struct dgram_packet *dgram = &p->packet.dgram; uint32_t 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 = get_safe_str_ptr(buf,len,discard_const_p(char, buf),9); if (!s) { goto done; } s = skip_string(buf,len,s); if (!s) { goto done; } 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, lp_netbios_name())) 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); strlcpy(servrec->serv.comment,comment,sizeof(servrec->serv.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: return; } /**************************************************************************** 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_t 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, lp_netbios_name()); if (!strupper_m(myname)) { DEBUG(4,("strupper_m %s failed\n", myname)); return; } myname[15]='\0'; push_ascii(p, myname, sizeof(outbuf)-PTR_DIFF(p,outbuf)-1, STR_TERMINATE); p = skip_string(outbuf,sizeof(outbuf),p); /* 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, lp_netbios_name(),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(outbuf,sizeof(outbuf),p); } #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), lp_netbios_name(), 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,const char *buf) { struct dgram_packet *dgram = &p->packet.dgram; struct work_record *work; unsigned char max_number_requested = CVAL(buf,0); uint32_t 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; 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: return; } /******************************************************************* 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,const char *buf) { struct dgram_packet *dgram = &p->packet.dgram; int state = CVAL(buf,0); struct subnet_record *sr; 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")); } /******************************************************************* 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, const char *buf) { struct dgram_packet *dgram = &p->packet.dgram; struct work_record *work; unstring workgroup_name; 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: return; } /******************************************************************* 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, const char *buf, int len) { struct dgram_packet *dgram = &p->packet.dgram; unstring workgroup_name; 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: return; }