diff options
Diffstat (limited to 'source4/nmbd/nmbd_incomingdgrams.c')
| -rw-r--r-- | source4/nmbd/nmbd_incomingdgrams.c | 858 |
1 files changed, 858 insertions, 0 deletions
diff --git a/source4/nmbd/nmbd_incomingdgrams.c b/source4/nmbd/nmbd_incomingdgrams.c new file mode 100644 index 0000000000..3000c347d8 --- /dev/null +++ b/source4/nmbd/nmbd_incomingdgrams.c @@ -0,0 +1,858 @@ +/* + 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; + char *announce_name = buf+5; + uint32 servertype = IVAL(buf,23); + char *comment = buf+31; + struct work_record *work; + struct server_record *servrec; + const char *work_name; + char *source_name = dgram->source_name.name; + + START_PROFILE(host_announce); + comment[43] = 0; + + 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. */ + 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())) + 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); + StrnCpy(servrec->serv.comment,comment,sizeof(servrec->serv.comment)-1); + } + } + 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; + char *workgroup_announce_name = buf+5; + uint32 servertype = IVAL(buf,23); + char *master_name = buf+31; + struct work_record *work; + char *source_name = dgram->source_name.name; + + START_PROFILE(workgroup_announce); + master_name[43] = 0; + + 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(dgram->dest_name.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; + char *server_name = buf+5; + uint32 servertype = IVAL(buf,23); + char *comment = buf+31; + char *work_name; + struct work_record *work; + struct server_record *servrec; + char *source_name = dgram->source_name.name; + + START_PROFILE(local_master_announce); + comment[43] = 0; + + 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. */ + work_name = dgram->dest_name.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); + StrnCpy(servrec->serv.comment,comment,sizeof(servrec->serv.comment)-1); + } + + 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) +{ + char *local_master_name = buf; + struct work_record *work; + struct browse_cache_record *browrec; + + START_PROFILE(master_browser_announce); + local_master_name[15] = 0; + + 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); + char *announce_name = buf+9; + struct work_record *work; + struct server_record *servrec; + const char *work_name; + char *source_name = dgram->source_name.name; + pstring comment; + char *s = buf+9; + + START_PROFILE(lm_host_announce); + s = skip_string(s,1); + StrnCpy(comment, s, 43); + + DEBUG(3,("process_lm_host_announce: LM Announcement 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_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; + } + + /* For a LanMan host announce the workgroup name is the destination name. */ + 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. This code is probably + * not needed in the LanMan announce code, but it won't hurt. + */ + + if(strequal(work_name, lp_netbios_name())) + 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); + StrnCpy(servrec->serv.comment,comment,sizeof(servrec->serv.comment)-1); + } + } + 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; +#if 0 + struct server_record *servrec; +#endif + + 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; + StrnCpy(p,lp_netbios_name(),15); + strupper(p); + 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, lp_netbios_name(),15)) + continue; + + if(!(servrec->serv.type & SV_TYPE_BACKUP_BROWSER)) + continue; + + StrnCpy(p, servrec->serv.name, 15); + strupper(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); + + DEBUG(4,("send_backup_list_response: sending response to %s<00> IP %s with %d servers.\n", + send_to_name->name, inet_ntoa(sendto_ip), count)); + + send_mailslot(True, BROWSE_MAILSLOT, + outbuf,PTR_DIFF(p,outbuf), + lp_netbios_name(), 0, + send_to_name->name,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; + char *workgroup_name = dgram->dest_name.name; + struct subnet_record *search_subrec = subrec; + + START_PROFILE(get_backup_list); + 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; + char *workgroup_name = dgram->dest_name.name; + + START_PROFILE(announce_request); + 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; + char *workgroup_name = dgram->dest_name.name; + + START_PROFILE(lm_announce_request); + 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); +} |