diff options
Diffstat (limited to 'source/namework.c')
| -rw-r--r-- | source/namework.c | 733 |
1 files changed, 0 insertions, 733 deletions
diff --git a/source/namework.c b/source/namework.c deleted file mode 100644 index ff623e69dbf..00000000000 --- a/source/namework.c +++ /dev/null @@ -1,733 +0,0 @@ -/* - Unix SMB/Netbios implementation. - Version 1.9. - NBT netbios routines and daemon - version 2 - Copyright (C) Andrew Tridgell 1994-1997 - - 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. - - Revision History: - - 14 jan 96: lkcl@pires.co.uk - added multiple workgroup domain master support - -*/ - -#include "includes.h" - -extern int ClientNMB; -extern int ClientDGRAM; - -#define TEST_CODE /* want to debug unknown browse packets */ - -extern int DEBUGLEVEL; -extern pstring scope; -extern BOOL CanRecurse; - -extern pstring myname; -extern fstring myworkgroup; - -extern int ClientNMB; -extern int ClientDGRAM; - -extern struct in_addr ipzero; - -extern int workgroup_count; /* total number of workgroups we know about */ - -/* this is our domain/workgroup/server database */ -extern struct subnet_record *subnetlist; - -extern int updatecount; - -/* backup request types: which servers are to be included */ -#define MASTER_TYPE (SV_TYPE_MASTER_BROWSER) -#define DOMCTL_TYPE (SV_TYPE_DOMAIN_CTRL ) - -extern time_t StartupTime; - -extern BOOL updatedlists; - -/**************************************************************************** -tell a server to become a backup browser -state - 0x01 become backup instead of master - - 0x02 remove all entries in browse list and become non-master - - 0x04 stop master browser service altogether. NT ignores this -**************************************************************************/ -void reset_server(char *name, int state, struct in_addr ip) -{ - char outbuf[20]; - char *p; - - bzero(outbuf,sizeof(outbuf)); - p = outbuf; - - CVAL(p,0) = ANN_ResetBrowserState; - CVAL(p,2) = state; - p += 2; - - DEBUG(2,("sending reset to %s %s of state %d\n", - name,inet_ntoa(ip),state)); - - send_mailslot_reply(False,BROWSE_MAILSLOT,ClientDGRAM, - outbuf,PTR_DIFF(p,outbuf), - myname,name,0x20,0x1d,ip,*iface_ip(ip)); -} - - -/**************************************************************************** -tell a server to become a backup browser -**************************************************************************/ -void tell_become_backup(void) -{ - /* 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. - */ - - struct subnet_record *d; - for (d = FIRST_SUBNET; d; d = NEXT_SUBNET_EXCLUDING_WINS(d)) - { - struct work_record *work; - for (work = d->workgrouplist; work; work = work->next) - { - struct server_record *s; - int num_servers = 0; - int num_backups = 0; - - for (s = work->serverlist; s; s = s->next) - { - if (s->serv.type & SV_TYPE_DOMAIN_ENUM) continue; - - num_servers++; - - if (strequal(myname, s->serv.name)) continue; - - if (s->serv.type & SV_TYPE_BACKUP_BROWSER) { - num_backups++; - continue; - } - - if (s->serv.type & SV_TYPE_MASTER_BROWSER) continue; - - if (!(s->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", - s->serv.name, inet_ntoa(d->bcast_ip), - work->work_group)); - - /* type 11 request from MYNAME(20) to WG(1e) for SERVER */ - do_announce_request(s->serv.name, work->work_group, - ANN_BecomeBackup, 0x20, 0x1e, d->bcast_ip); - } - } - } -} - - -/******************************************************************* - same context: scope. should check name_type as well, and makes sure - we don't process messages from ourselves - ******************************************************************/ -BOOL same_context(struct dgram_packet *dgram) -{ - if (!strequal(dgram->dest_name .scope,scope )) return(True); - if ( strequal(dgram->source_name.name ,myname)) return(True); - - return(False); -} - - -/******************************************************************* - process a domain announcement frame - - Announce frames come in 3 types. Servers send host announcements - (command=1) to let the master browswer know they are - available. Master browsers send local master announcements - (command=15) to let other masters and backups that they are the - master. They also send domain announcements (command=12) to register - the domain - - The comment field of domain announcements contains the master - browser name. The servertype is used by NetServerEnum to select - resources. We just have to pass it to smbd (via browser.dat) and let - the client choose using bit masks. - ******************************************************************/ -static void process_localnet_announce(struct packet_struct *p,uint16 command,char *buf) -{ - struct dgram_packet *dgram = &p->packet.dgram; - struct subnet_record *d = find_subnet(p->ip); /* Explicitly exclude WINS - local nets only */ - int update_count = CVAL(buf,0); - - int ttl = IVAL(buf,1)/1000; - char *name = buf+5; - int osmajor=CVAL(buf,21); - int osminor=CVAL(buf,22); - uint32 servertype = IVAL(buf,23); - uint32 browse_type= CVAL(buf,27); - uint32 browse_sig = CVAL(buf,29); - char *comment = buf+31; - - struct work_record *work; - char *work_name; - char *serv_name = dgram->source_name.name; - BOOL add = False; - - comment[43] = 0; - - DEBUG(4,("Announce(%d) %s(%x)",command,name,name[15])); - DEBUG(4,("%s count=%d ttl=%d OS=(%d,%d) type=%08x sig=%4x %4x comment=%s\n", - namestr(&dgram->dest_name),update_count,ttl,osmajor,osminor, - servertype,browse_type,browse_sig,comment)); - - name[15] = 0; - - if (dgram->dest_name.name_type == 0 && command == ANN_HostAnnouncement) - { - DEBUG(2,("Announce to nametype(0) not supported yet\n")); - return; - } - - if (command == ANN_DomainAnnouncement && - ((!strequal(dgram->dest_name.name, MSBROWSE)) || - dgram->dest_name.name_type != 0x1)) - { - DEBUG(0,("Announce(%d) from %s should be __MSBROWSE__(1) not %s\n", - command, inet_ntoa(p->ip), namestr(&dgram->dest_name))); - return; - } - - if (!strequal(dgram->dest_name.scope,scope )) return; - - if (command == ANN_DomainAnnouncement) { - /* XXXX if we are a master browser for the workgroup work_name, - then there is a local subnet configuration problem. only - we should be sending out such domain announcements, because - as the master browser, that is our job. - - stop being a master browser, and force an election. this will - sort out the network problem. hopefully. - */ - - work_name = name; - add = True; - } else { - work_name = dgram->dest_name.name; - } - - /* we need some way of finding out about new workgroups - that appear to be sending packets to us. The name_type checks make - sure we don't add host names as workgroups */ - if (command == ANN_HostAnnouncement && - (dgram->dest_name.name_type == 0x1d || - dgram->dest_name.name_type == 0x1e)) - add = True; - - DEBUG(4,("search for workgroup: %s (add? %s)\n", - work_name, BOOLSTR(add))); - - if (!(work = find_workgroupstruct(d, work_name,add))) - return; - - DEBUG(4, ("workgroup %s on %s\n", work->work_group, serv_name)); - - ttl = GET_TTL(ttl); - - /* add them to our browse list, and update the browse.dat file */ - add_server_entry(d,work,name,servertype|SV_TYPE_LOCAL_LIST_ONLY,ttl,comment,True); - updatedlists = True; - -#if 0 - /* the tell become backup code is broken, no great harm is done by - disabling it */ - tell_become_backup(); -#endif - -#if 0 /* JRA TEST - I Think this code should not be here */ - /* get the local_only browse list from the local master and add it - to ours. */ - if (command == ANN_LocalMasterAnnouncement) - { - add_browser_entry(serv_name,dgram->dest_name.name_type, - work->work_group,30,p->ip,True); - } -#endif /* END JRA TEST */ -} - -/******************************************************************* - process a master announcement frame - Domain master browsers recieve these from local masters. The Domain - master should then issue a sync with the local master, asking for - that machines local server list. - ******************************************************************/ -static void process_master_announce(struct packet_struct *p,char *buf) -{ - struct dgram_packet *dgram = &p->packet.dgram; - char *name = buf; - struct work_record *work; - name[15] = 0; - - DEBUG(3,("process_master_announce: Master Announce from %s (%s)\n",name,inet_ntoa(p->ip))); - - if (same_context(dgram)) return; - - if (!wins_subnet) - { - DEBUG(3,("process_master_announce: No wins subnet !\n")); - return; - } - - if (!lp_domain_master()) - { - DEBUG(3,("process_master_announce: Not configured as domain master - ignoring master announce.\n")); - return; - } - - for (work = wins_subnet->workgrouplist; work; work = work->next) - { - if (AM_MASTER(work) || AM_DOMMST(work)) - { - /* merge browse lists with them */ - add_browser_entry(name,0x1d, work->work_group,30,wins_subnet,p->ip,True); - } - } -} - -/******************************************************************* - process a receive backup list request - - we receive a list of servers, and we attempt to locate them all on - our local subnet, and sync browse lists with them on the workgroup - they are said to be in. - - XXXX NOTE: this function is in overdrive. it should not really do - half of what it actually does (it should pick _one_ name from the - list received and sync with it at regular intervals, rather than - sync with them all only once!) - - ******************************************************************/ -static void process_rcv_backup_list(struct packet_struct *p,char *buf) -{ - struct dgram_packet *dgram = &p->packet.dgram; - int count = CVAL(buf,0); - uint32 info = IVAL(buf,1); /* XXXX caller's incremental info */ - char *buf1; - - DEBUG(3,("Receive Backup ack for %s from %s total=%d info=%d\n", - namestr(&dgram->dest_name), inet_ntoa(p->ip), - count, info)); - - if (same_context(dgram)) return; - - if (count <= 0) return; - - /* go through the list of servers attempting to sync browse lists */ - for (buf1 = buf+5; *buf1 && count; buf1 = skip_string(buf1, 1), --count) - { - struct in_addr back_ip; - /* struct subnet_record *d; */ - - DEBUG(4,("Searching for backup browser %s at %s...\n", - buf1, inet_ntoa(p->ip))); - - /* XXXX assume name is a DNS name NOT a netbios name. a more complete - approach is to use reply_name_query functionality to find the name */ - - back_ip = *interpret_addr2(buf1); - - if (zero_ip(back_ip)) - { - DEBUG(4,("Failed to find backup browser server using DNS\n")); - continue; - } - - DEBUG(4,("Found browser server at %s\n", inet_ntoa(back_ip))); - DEBUG(4,("END THIS LOOP: CODE NEEDS UPDATING\n")); - -#if 0 - /* XXXX function needs work */ - continue; - - if ((d = find_subnet(back_ip))) - { - struct subnet_record *d1; - for (d1 = subnetlist; d1; d1 = d1->next) - { - struct work_record *work; - for (work = d1->workgrouplist; work; work = work->next) - { - if (work->token == 0 /* token */) - { - queue_netbios_packet(d1,ClientNMB,NMB_QUERY,NAME_QUERY_SRV_CHK, - work->work_group,0x1d, - 0,0,0,NULL,NULL, - False,False,back_ip,back_ip); - return; - } - } - } - } -#endif - } -} - - -/**************************************************************************** - send a backup list response. - **************************************************************************/ -static void send_backup_list(char *work_name, struct nmb_name *src_name, - int token, uint32 info, - int name_type, struct in_addr ip) -{ - char outbuf[1024]; - char *p, *countptr, *nameptr; - int count = 0; - char *theirname = src_name->name; - - DEBUG(3,("sending backup list of %s to %s: %s(%x) %s(%x)\n", - work_name, inet_ntoa(ip), - myname,0x0,theirname,0x0)); - - if (name_type == 0x1d) - { - DEBUG(4,("master browsers: ")); - } - else if (name_type == 0x1b) - { - DEBUG(4,("domain controllers: ")); - } - else - { - DEBUG(0,("backup request for unknown type %0x\n", name_type)); - return; - } - - bzero(outbuf,sizeof(outbuf)); - p = outbuf; - - CVAL(p,0) = ANN_GetBackupListResp; /* backup list response */ - - p++; - countptr = p; - - SIVAL(p,1,info); /* the sender's unique info */ - - p += 5; - - nameptr = p; - -#if 0 - - for (d = FIRST_SUBNET; d; d = NEXT_SUBNET_INCLUDING_WINS(d)) - { - struct work_record *work; - - for (work = d->workgrouplist; work; work = work->next) - { - struct server_record *s; - - if (!strequal(work->work_group, work_name)) continue; - - for (s = work->serverlist; s; s = s->next) - { - BOOL found = False; - char *n; - - if (s->serv.type & SV_TYPE_DOMAIN_ENUM) continue; - - for (n = nameptr; n < p; n = skip_string(n, 1)) - { - if (strequal(n, s->serv.name)) found = True; - } - - if (found) continue; /* exclude names already added */ - - /* workgroup request: include all backup browsers in the list */ - /* domain request: include all domain members in the list */ - - if ((name_type == 0x1d && (s->serv.type & MASTER_TYPE)) || - (name_type == 0x1b && (s->serv.type & DOMCTL_TYPE))) - { - DEBUG(4, ("%s ", s->serv.name)); - - count++; - strcpy(p,s->serv.name); - strupper(p); - p = skip_string(p,1); - } - } - } - } - -#endif - - count++; - strcpy(p,myname); - strupper(p); - p = skip_string(p,1); - - if (count == 0) - { - DEBUG(4, ("none\n")); - } - else - { - DEBUG(4, (" - count %d\n", count)); - } - - CVAL(countptr, 0) = count; - - { - int len = PTR_DIFF(p, outbuf); - debug_browse_data(outbuf, len); - } - send_mailslot_reply(False,BROWSE_MAILSLOT,ClientDGRAM, - outbuf,PTR_DIFF(p,outbuf), - myname,theirname,0x0,0x0,ip,*iface_ip(ip)); -} - - -/******************************************************************* - process a send backup list request - - 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. - - Currently samba only sends back one name in the backup list, its - own. For larger nets we'll have to add backups and send "become - backup" requests occasionally. - ******************************************************************/ -static void process_send_backup_list(struct packet_struct *p,char *buf) -{ - struct dgram_packet *dgram = &p->packet.dgram; - struct in_addr ip = dgram->header.source_ip; - struct subnet_record *d; - struct work_record *work; - - int token = CVAL(buf,0); /* sender's key index for the workgroup */ - uint32 info = IVAL(buf,1); /* XXXX don't know: some sort of info */ - int name_type = dgram->dest_name.name_type; - - if (same_context(dgram)) return; - - if (name_type != 0x1b && name_type != 0x1d) { - DEBUG(0,("backup request to wrong type %d from %s\n", - name_type,inet_ntoa(ip))); - return; - } - - for (d = subnetlist; d; d = d->next) - { - for (work = d->workgrouplist; work; work = work->next) - { - if (strequal(work->work_group, dgram->dest_name.name)) - { - DEBUG(2,("sending backup list to %s %s id=%x\n", - namestr(&dgram->dest_name),inet_ntoa(ip),info)); - - send_backup_list(work->work_group,&dgram->source_name, - token,info,name_type,ip); - return; - } - } - } -} - - -/******************************************************************* - process a reset browser state - - 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. no way. ain't gonna. - - ******************************************************************/ -static void process_reset_browser(struct packet_struct *p,char *buf) -{ - struct dgram_packet *dgram = &p->packet.dgram; - int state = CVAL(buf,0); - - DEBUG(1,("received diagnostic browser reset request to %s state=0x%X\n", - namestr(&dgram->dest_name), state)); - - /* stop being a master but still deal with being a backup browser */ - if (state & 0x1) - { - struct subnet_record *d; - for (d = FIRST_SUBNET; d; d = NEXT_SUBNET_EXCLUDING_WINS(d)) - { - struct work_record *work; - for (work = d->workgrouplist; work; work = work->next) - { - if (AM_MASTER(work)) - { - unbecome_local_master(d,work,SV_TYPE_MASTER_BROWSER); - } - } - } - } - - /* XXXX documentation inconsistency: the above description does not - exactly tally with what is implemented for state & 0x2 - */ - - /* totally delete all servers and start afresh */ - if (state & 0x2) - { - struct subnet_record *d; - for (d = FIRST_SUBNET; d; d = NEXT_SUBNET_INCLUDING_WINS(d)) - { - struct work_record *work; - for (work=d->workgrouplist;work;work=remove_workgroup(d,work,True)); - } - add_my_subnets(myworkgroup); - } - - /* stop browsing altogether. i don't think this is a good idea! */ - if (state & 0x4) - { - DEBUG(1,("ignoring request to stop being a browser. sorry!\n")); - } -} - -/******************************************************************* - process a announcement request - - clients send these when they want everyone to send an announcement - immediately. This can cause quite a storm of packets! - ******************************************************************/ -static void process_announce_request(struct packet_struct *p,char *buf) -{ - struct dgram_packet *dgram = &p->packet.dgram; - struct work_record *work; - struct in_addr ip = dgram->header.source_ip; - struct subnet_record *d = find_subnet(ip); /* Explicitly NO WINS */ - int token = CVAL(buf,0); - char *name = buf+1; - - name[15] = 0; - - DEBUG(3,("process_announce_request: Announce request from %s to %s token=0x%X\n", - name,namestr(&dgram->dest_name), token)); - - if (strequal(dgram->source_name.name,myname)) return; - - /* XXXX BUG or FEATURE?: need to ensure that we are a member of - this workgroup before announcing, particularly as we only - respond on local interfaces anyway. - - if (strequal(dgram->dest_name, myworkgroup) return; ??? - */ - - if (!d) - { - DEBUG(3,("process_announce_request: No local interface to announce to %s\n", - name)); - return; - } - - for (work = d->workgrouplist; work; work = work->next) - { - /* XXXX BUG: the destination name type should also be checked, - not just the name. e.g if the name is WORKGROUP(0x1d) then - we should only respond if we own that name */ - - if (strequal(dgram->dest_name.name,work->work_group)) - { - work->needannounce = True; - } - } -} - - - -/**************************************************************************** -process a browse frame -****************************************************************************/ -void process_browse_packet(struct packet_struct *p,char *buf,int len) -{ - int command = CVAL(buf,0); - switch (command) - { - case ANN_HostAnnouncement: - case ANN_DomainAnnouncement: - case ANN_LocalMasterAnnouncement: - { - debug_browse_data(buf, len); - process_localnet_announce(p,command,buf+1); - break; - } - - case ANN_AnnouncementRequest: - { - process_announce_request(p,buf+1); - break; - } - - case ANN_Election: - { - process_election(p,buf+1); - break; - } - - case ANN_GetBackupListReq: - { - debug_browse_data(buf, len); - process_send_backup_list(p,buf+1); - break; - } - - case ANN_GetBackupListResp: - { - debug_browse_data(buf, len); - process_rcv_backup_list(p, buf+1); - break; - } - - case ANN_ResetBrowserState: - { - process_reset_browser(p, buf+1); - break; - } - - case ANN_MasterAnnouncement: - { - process_master_announce(p,buf+1); - break; - } - - default: - { - struct dgram_packet *dgram = &p->packet.dgram; - DEBUG(4,("ignoring browse packet %d from %s %s to %s\n", - command, namestr(&dgram->source_name), - inet_ntoa(p->ip), namestr(&dgram->dest_name))); - } - } -} - - |