diff options
Diffstat (limited to 'source/nameserv.c')
| -rw-r--r-- | source/nameserv.c | 440 |
1 files changed, 0 insertions, 440 deletions
diff --git a/source/nameserv.c b/source/nameserv.c deleted file mode 100644 index f1b34482c85..00000000000 --- a/source/nameserv.c +++ /dev/null @@ -1,440 +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. - - Module name: nameserv.c - - Revision History: - - 14 jan 96: lkcl@pires.co.uk - added multiple workgroup domain master support - - 04 jul 96: lkcl@pires.co.uk - module nameserv contains name server management functions -*/ - -#include "includes.h" - -extern int ClientNMB; - -extern int DEBUGLEVEL; - -extern pstring scope; -extern pstring myname; -extern fstring myworkgroup; -extern struct in_addr ipzero; -extern struct in_addr wins_ip; - -extern struct subnet_record *subnetlist; - -extern uint16 nb_type; /* samba's NetBIOS type */ - -/**************************************************************************** - remove an entry from the name list - - note: the name will _always_ be removed - XXXX at present, the name is removed _even_ if a WINS server says keep it. - - If direct is True then the name being removed must have been a direct name - add. This is done for special names such as DOMAIN<1b>. Just delete it - without any network release traffic. - - ****************************************************************************/ -void remove_name_entry(struct subnet_record *d, char *name,int type, BOOL direct) -{ - /* XXXX BUG: if samba is offering WINS support, it should still broadcast - a de-registration packet to the local subnet before removing the - name from its local-subnet name database. */ - - int search = FIND_SELF; - struct name_record n; - struct name_record *n2=NULL; - - make_nmb_name(&n.name,name,type,scope); - - if(d == wins_subnet) - search |= FIND_WINS; - else - search |= FIND_LOCAL; - - if ((n2 = find_name_search(&d, &n.name, search, ipzero))) - { - /* check name isn't already being de-registered */ - if (NAME_DEREG(n2->ip_flgs[0].nb_flags)) - return; - - /* mark the name as in the process of deletion. */ - n2->ip_flgs[0].nb_flags &= NB_DEREG; - } - - if (!n2) return; - - /* Only remove names with non-zero death times. */ - if(n2->death_time == 0) - { - DEBUG(5,("remove_name_entry: Name %s(%d) has zero ttl - not removing.\n", - name, type)); - return; - } - - /* remove the name immediately. even if the spec says we should - first try to release them, this is too dangerous with our current - name structures as otherwise we will end up replying to names we - don't really own */ - remove_netbios_name(d,name,type,SELF,n2->ip_flgs[0].ip); - - if (ip_equal(d->bcast_ip, wins_ip)) - { - if (!lp_wins_support() && !direct) - { - /* not a WINS server: we have to release them on the network */ - queue_netbios_pkt_wins(ClientNMB,NMB_REL,NAME_RELEASE, - name, type, 0, 0,0,NULL,NULL, - False, True, ipzero, ipzero); - } - } - else - { - if(!direct) - /* local interface: release them on the network */ - queue_netbios_packet(d,ClientNMB,NMB_REL,NAME_RELEASE, - name, type, 0, 0,0,NULL,NULL, - True, False, d->bcast_ip, d->bcast_ip); - } -} - - -/**************************************************************************** - add an entry to the name list - If the direct BOOL is set then no network traffic is done for the add - it - is just blasted into the subnet entry with a zero TTL - it will not - expire and has not been legitimately claimed. This is *only* done if - we are a WINS server or for a special name such as DOMAIN<1b>. - - big note: our name will _always_ be added (if there are no objections). - it's just a matter of when this will be done (e.g after a time-out). - - ****************************************************************************/ -void add_my_name_entry(struct subnet_record *d,char *name,int type,int nb_flags, BOOL direct) -{ - BOOL re_reg = False; - struct nmb_name n; - - if (!d) return; - - /* not that it particularly matters, but if the SELF name already exists, - it must be re-registered, rather than just registered */ - - make_nmb_name(&n, name, type, scope); - if (find_name(d->namelist, &n, SELF)) - re_reg = True; - - /* XXXX BUG: if samba is offering WINS support, it should still add the - name entry to a local-subnet name database. see rfc1001.txt 15.1.1 p28 - regarding the point about M-nodes. */ - - if (ip_equal(d->bcast_ip, wins_ip)) - { - if (lp_wins_support() || direct) - { - /* we are a WINS server. */ - if(lp_wins_support()) - DEBUG(4,("add_my_name_entry: samba as WINS server adding: ")); - else - DEBUG(4,("add_my_name_entry: direct name entry : adding: ")); - - /* this will call add_netbios_entry() */ - name_register_work(d, name, type, nb_flags,0, ipzero, False); - } - else - { - DEBUG(4,("add_my_name_entry registering name %s with WINS server.\n", - name)); - - /* a time-to-live allows us to refresh this name with the WINS server. */ - queue_netbios_pkt_wins(ClientNMB, - re_reg ? NMB_REG_REFRESH : NMB_REG, NAME_REGISTER, - name, type, nb_flags, GET_TTL(0),0,NULL,NULL, - False, True, ipzero, ipzero); - } - } - else - { - if(direct) - { - /* Just enter the name to be the ip address of the subnet - via name_register_work to ensure all side effects are done. - */ - DEBUG(4,("add_my_name_entry: direct name entry : adding: ")); - /* this will call add_netbios_entry() */ - name_register_work(d, name, type, nb_flags,0, d->myip, False); - } - else - { - /* broadcast the packet, but it comes from ipzero */ - queue_netbios_packet(d,ClientNMB, - re_reg ? NMB_REG_REFRESH : NMB_REG, NAME_REGISTER, - name, type, nb_flags, GET_TTL(0),0,NULL,NULL, - True, False, d->bcast_ip, ipzero); - } - } -} - - -/**************************************************************************** - add the domain logon server and domain master browser names - - this code was written so that several samba servers can co-operate in - sharing the task of (one server) being a domain master, and of being - domain logon servers. - - **************************************************************************/ -void add_domain_names(time_t t) -{ - static time_t lastrun = 0; - struct subnet_record *d; - struct work_record *work; - struct nmb_name n; - - if (lastrun != 0 && t < lastrun + CHECK_TIME_ADD_DOM_NAMES * 60) return; - lastrun = t; - - for (d = FIRST_SUBNET; d; d = NEXT_SUBNET_INCLUDING_WINS(d)) - { - work = find_workgroupstruct(d, myworkgroup, False); - if (lp_domain_logons() && work && work->log_state == LOGON_NONE) - { - make_nmb_name(&n,myworkgroup,0x1c,scope); - if (!find_name(d->namelist, &n, FIND_SELF)) - { - /* logon servers are group names - we don't expect this to fail. */ - DEBUG(0,("%s attempting to become logon server for %s %s\n", - timestring(), myworkgroup, inet_ntoa(d->bcast_ip))); - become_logon_server(d, work); - } - } - } - - for (d = FIRST_SUBNET; d; d = NEXT_SUBNET_INCLUDING_WINS(d)) - { - work = find_workgroupstruct(d, myworkgroup, True); - - if (lp_domain_master() && work && work->dom_state == DOMAIN_NONE) - { - make_nmb_name(&n,myworkgroup,0x1b,scope); - if (!find_name(d->namelist, &n, FIND_SELF)) - { - DEBUG(0,("%s add_domain_names: attempting to become domain master \ -browser on workgroup %s %s\n", - timestring(), myworkgroup, inet_ntoa(d->bcast_ip))); - - if(d == wins_subnet) - { - if (lp_wins_support()) - { - /* use the wins server's capabilities (indirectly). if - someone has already registered the domain<1b> name with - the WINS server, then the WINS server's job is to _check_ - that the owner still wants it, before giving it away. - */ - - DEBUG(1,("%s initiating becoming domain master for %s\n", - timestring(), myworkgroup)); - become_domain_master(d, work); - } - else - { - /* send out a query to establish whether there's a - domain controller on the WINS subnet. if not, - we can become a domain controller. - it's only polite that we check, before claiming the - NetBIOS name 0x1b. - */ - - DEBUG(0,("add_domain_names:querying WINS for domain master \ -on workgroup %s\n", myworkgroup)); - - queue_netbios_pkt_wins(ClientNMB,NMB_QUERY,NAME_QUERY_DOMAIN, - myworkgroup, 0x1b, - 0, 0,0,NULL,NULL, - False, True, ipzero, ipzero); - } - } - else - { - DEBUG(0,("add_domain_names:querying subnet %s for domain master \ -on workgroup %s\n", inet_ntoa(d->bcast_ip), myworkgroup)); - queue_netbios_packet(d,ClientNMB,NMB_QUERY,NAME_QUERY_DOMAIN, - myworkgroup, 0x1b, - 0, 0,0,NULL,NULL, - True, False, - d->bcast_ip, d->bcast_ip); - } - } - } - } -} - - -/**************************************************************************** - add the magic samba names, useful for finding samba servers - **************************************************************************/ -void add_my_names(void) -{ - struct subnet_record *d; - /* each subnet entry, including WINS pseudo-subnet, has SELF names */ - - /* XXXX if there was a transport layer added to samba (ipx/spx etc) then - there would be yet _another_ for-loop, this time on the transport type - */ - - for (d = FIRST_SUBNET; d; d = NEXT_SUBNET_INCLUDING_WINS(d)) - { - BOOL wins = (lp_wins_support() && (d == wins_subnet)); - - add_my_name_entry(d, myname,0x20,nb_type|NB_ACTIVE,False); - add_my_name_entry(d, myname,0x03,nb_type|NB_ACTIVE,False); - add_my_name_entry(d, myname,0x00,nb_type|NB_ACTIVE,False); - - /* these names are added permanently (ttl of zero) and will NOT be - refreshed with the WINS server */ - add_netbios_entry(d,"*",0x0,nb_type|NB_ACTIVE,0,SELF,d->myip,False,wins); - add_netbios_entry(d,"*",0x20,nb_type|NB_ACTIVE,0,SELF,d->myip,False,wins); - add_netbios_entry(d,"__SAMBA__",0x20,nb_type|NB_ACTIVE,0,SELF,d->myip,False,wins); - add_netbios_entry(d,"__SAMBA__",0x00,nb_type|NB_ACTIVE,0,SELF,d->myip,False,wins); - } -} - - -/**************************************************************************** - remove all the samba names... from a WINS server if necessary. - **************************************************************************/ -void remove_my_names() -{ - struct subnet_record *d; - - for (d = FIRST_SUBNET; d; d = NEXT_SUBNET_INCLUDING_WINS(d)) - { - struct name_record *n, *next; - - for (n = d->namelist; n; n = next) - { - next = n->next; - if (n->source == SELF) - { - /* get all SELF names removed from the WINS server's database */ - /* XXXX note: problem occurs if this removes the wrong one! */ - - remove_name_entry(d,n->name.name, n->name.name_type,False); - } - } - } -} - - -/******************************************************************* - refresh my own names - ******************************************************************/ -void refresh_my_names(time_t t) -{ - struct subnet_record *d; - - for (d = FIRST_SUBNET; d; d = NEXT_SUBNET_INCLUDING_WINS(d)) - { - struct name_record *n; - - for (n = d->namelist; n; n = n->next) - { - /* each SELF name has an individual time to be refreshed */ - if (n->source == SELF && n->refresh_time < t && - n->death_time != 0) - { - add_my_name_entry(d,n->name.name,n->name.name_type, - n->ip_flgs[0].nb_flags,False); - /* they get a new lease on life :-) */ - n->death_time += GET_TTL(0); - n->refresh_time += GET_TTL(0); - } - } - } -} - - -/******************************************************************* - queries names occasionally. an over-cautious, non-trusting WINS server! - - this function has been added because nmbd could be restarted. it - is generally a good idea to check all the names that have been - reloaded from file. - - XXXX which names to poll and which not can be refined at a later date. - ******************************************************************/ -void query_refresh_names(time_t t) -{ - struct name_record *n; - struct subnet_record *d = wins_subnet; - - static time_t lasttime = 0; - - int count = 0; - int name_refresh_time = NAME_POLL_REFRESH_TIME; - int max_count = name_refresh_time * 2 / NAME_POLL_INTERVAL; - if (max_count > 10) max_count = 10; - - name_refresh_time = NAME_POLL_INTERVAL * max_count / 2; - - /* if (!lp_poll_wins()) return; polling of registered names allowed */ - - if (!d) return; - - if (!lasttime) lasttime = t; - if (t - lasttime < NAME_POLL_INTERVAL) return; - - lasttime = time(NULL); - - for (n = d->namelist; n; n = n->next) - { - /* only do unique, registered names */ - - if (n->source != REGISTER) continue; - if (!NAME_GROUP(n->ip_flgs[0].nb_flags)) continue; - - if (n->refresh_time < t) - { - DEBUG(3,("Polling name %s\n", namestr(&n->name))); - - queue_netbios_packet(d,ClientNMB,NMB_QUERY,NAME_QUERY_CONFIRM, - n->name.name, n->name.name_type, - 0,0,0,NULL,NULL, - False,False,n->ip_flgs[0].ip,n->ip_flgs[0].ip); - count++; - } - - if (count >= max_count) - { - /* don't do too many of these at once, but do enough to - cover everyone in the list */ - return; - } - - /* this name will be checked on again, if it's not removed */ - n->refresh_time += name_refresh_time; - } -} - |