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30191d1a57
bugs in various places whilst doing this (places that assumed
BOOL == int). I also need to fix the Samba4 pidl generation
(next checkin).
Jeremy.
(This used to be commit f35a266b3c
)
420 lines
13 KiB
C
420 lines
13 KiB
C
/*
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Unix SMB/CIFS implementation.
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NBT netbios routines and daemon - version 2
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Copyright (C) Andrew Tridgell 1994-1998
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Copyright (C) Luke Kenneth Casson Leighton 1994-1998
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Copyright (C) Jeremy Allison 1994-1998
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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int updatecount = 0;
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/*******************************************************************
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Remove all the servers in a work group.
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******************************************************************/
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void remove_all_servers(struct work_record *work)
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{
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struct server_record *servrec;
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struct server_record *nexts;
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for (servrec = work->serverlist; servrec; servrec = nexts) {
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DEBUG(7,("remove_all_servers: Removing server %s\n",servrec->serv.name));
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nexts = servrec->next;
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if (servrec->prev)
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servrec->prev->next = servrec->next;
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if (servrec->next)
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servrec->next->prev = servrec->prev;
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if (work->serverlist == servrec)
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work->serverlist = servrec->next;
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ZERO_STRUCTP(servrec);
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SAFE_FREE(servrec);
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}
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work->subnet->work_changed = True;
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}
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/***************************************************************************
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Add a server into the a workgroup serverlist.
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**************************************************************************/
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static void add_server_to_workgroup(struct work_record *work,
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struct server_record *servrec)
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{
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struct server_record *servrec2;
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if (!work->serverlist) {
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work->serverlist = servrec;
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servrec->prev = NULL;
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servrec->next = NULL;
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return;
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}
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for (servrec2 = work->serverlist; servrec2->next; servrec2 = servrec2->next)
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;
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servrec2->next = servrec;
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servrec->next = NULL;
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servrec->prev = servrec2;
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work->subnet->work_changed = True;
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}
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/****************************************************************************
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Find a server in a server list.
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**************************************************************************/
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struct server_record *find_server_in_workgroup(struct work_record *work, const char *name)
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{
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struct server_record *ret;
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for (ret = work->serverlist; ret; ret = ret->next) {
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if (strequal(ret->serv.name,name))
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return ret;
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}
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return NULL;
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}
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/****************************************************************************
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Remove a server entry from this workgroup.
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****************************************************************************/
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void remove_server_from_workgroup(struct work_record *work, struct server_record *servrec)
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{
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if (servrec->prev)
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servrec->prev->next = servrec->next;
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if (servrec->next)
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servrec->next->prev = servrec->prev;
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if (work->serverlist == servrec)
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work->serverlist = servrec->next;
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ZERO_STRUCTP(servrec);
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SAFE_FREE(servrec);
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work->subnet->work_changed = True;
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}
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/****************************************************************************
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Create a server entry on this workgroup.
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****************************************************************************/
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struct server_record *create_server_on_workgroup(struct work_record *work,
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const char *name,int servertype,
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int ttl, const char *comment)
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{
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struct server_record *servrec;
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if (name[0] == '*') {
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DEBUG(7,("create_server_on_workgroup: not adding name starting with '*' (%s)\n",
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name));
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return (NULL);
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}
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if((servrec = find_server_in_workgroup(work, name)) != NULL) {
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DEBUG(0,("create_server_on_workgroup: Server %s already exists on \
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workgroup %s. This is a bug.\n", name, work->work_group));
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return NULL;
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}
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if((servrec = SMB_MALLOC_P(struct server_record)) == NULL) {
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DEBUG(0,("create_server_entry_on_workgroup: malloc fail !\n"));
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return NULL;
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}
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memset((char *)servrec,'\0',sizeof(*servrec));
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servrec->subnet = work->subnet;
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fstrcpy(servrec->serv.name,name);
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fstrcpy(servrec->serv.comment,comment);
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strupper_m(servrec->serv.name);
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servrec->serv.type = servertype;
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update_server_ttl(servrec, ttl);
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add_server_to_workgroup(work, servrec);
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DEBUG(3,("create_server_on_workgroup: Created server entry %s of type %x (%s) on \
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workgroup %s.\n", name,servertype,comment, work->work_group));
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work->subnet->work_changed = True;
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return(servrec);
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}
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/*******************************************************************
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Update the ttl field of a server record.
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*******************************************************************/
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void update_server_ttl(struct server_record *servrec, int ttl)
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{
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if(ttl > lp_max_ttl())
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ttl = lp_max_ttl();
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if(is_myname(servrec->serv.name))
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servrec->death_time = PERMANENT_TTL;
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else
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servrec->death_time = (ttl != PERMANENT_TTL) ? time(NULL)+(ttl*3) : PERMANENT_TTL;
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servrec->subnet->work_changed = True;
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}
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/*******************************************************************
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Expire old servers in the serverlist. A time of -1 indicates
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everybody dies except those with a death_time of PERMANENT_TTL (which is 0).
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This should only be called from expire_workgroups_and_servers().
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******************************************************************/
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void expire_servers(struct work_record *work, time_t t)
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{
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struct server_record *servrec;
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struct server_record *nexts;
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for (servrec = work->serverlist; servrec; servrec = nexts) {
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nexts = servrec->next;
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if ((servrec->death_time != PERMANENT_TTL) && ((t == -1) || (servrec->death_time < t))) {
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DEBUG(3,("expire_old_servers: Removing timed out server %s\n",servrec->serv.name));
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remove_server_from_workgroup(work, servrec);
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work->subnet->work_changed = True;
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}
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}
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}
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/*******************************************************************
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Decide if we should write out a server record for this server.
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We return zero if we should not. Check if we've already written
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out this server record from an earlier subnet.
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******************************************************************/
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static uint32 write_this_server_name( struct subnet_record *subrec,
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struct work_record *work,
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struct server_record *servrec)
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{
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struct subnet_record *ssub;
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struct work_record *iwork;
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/* Go through all the subnets we have already seen. */
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for (ssub = FIRST_SUBNET; ssub && (ssub != subrec); ssub = NEXT_SUBNET_INCLUDING_UNICAST(ssub)) {
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for(iwork = ssub->workgrouplist; iwork; iwork = iwork->next) {
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if(find_server_in_workgroup( iwork, servrec->serv.name) != NULL) {
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/*
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* We have already written out this server record, don't
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* do it again. This gives precedence to servers we have seen
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* on the broadcast subnets over servers that may have been
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* added via a sync on the unicast_subet.
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*
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* The correct way to do this is to have a serverlist file
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* per subnet - this means changes to smbd as well. I may
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* add this at a later date (JRA).
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*/
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return 0;
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}
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}
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}
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return servrec->serv.type;
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}
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/*******************************************************************
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Decide if we should write out a workgroup record for this workgroup.
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We return zero if we should not. Don't write out lp_workgroup() (we've
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already done it) and also don't write out a second workgroup record
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on the unicast subnet that we've already written out on one of the
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broadcast subnets.
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******************************************************************/
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static uint32 write_this_workgroup_name( struct subnet_record *subrec,
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struct work_record *work)
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{
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struct subnet_record *ssub;
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if(strequal(lp_workgroup(), work->work_group))
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return 0;
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/* This is a workgroup we have seen on a broadcast subnet. All
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these have the same type. */
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if(subrec != unicast_subnet)
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return (SV_TYPE_DOMAIN_ENUM|SV_TYPE_NT|SV_TYPE_LOCAL_LIST_ONLY);
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for(ssub = FIRST_SUBNET; ssub; ssub = NEXT_SUBNET_EXCLUDING_UNICAST(ssub)) {
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/* This is the unicast subnet so check if we've already written out
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this subnet when we passed over the broadcast subnets. */
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if(find_workgroup_on_subnet( ssub, work->work_group) != NULL)
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return 0;
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}
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/* All workgroups on the unicast subnet (except our own, which we
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have already written out) cannot be local. */
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return (SV_TYPE_DOMAIN_ENUM|SV_TYPE_NT);
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}
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/*******************************************************************
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Write out the browse.dat file.
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******************************************************************/
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void write_browse_list_entry(XFILE *fp, const char *name, uint32 rec_type,
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const char *local_master_browser_name, const char *description)
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{
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fstring tmp;
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slprintf(tmp,sizeof(tmp)-1, "\"%s\"", name);
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x_fprintf(fp, "%-25s ", tmp);
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x_fprintf(fp, "%08x ", rec_type);
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slprintf(tmp, sizeof(tmp)-1, "\"%s\" ", local_master_browser_name);
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x_fprintf(fp, "%-30s", tmp);
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x_fprintf(fp, "\"%s\"\n", description);
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}
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void write_browse_list(time_t t, bool force_write)
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{
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struct subnet_record *subrec;
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struct work_record *work;
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struct server_record *servrec;
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pstring fname,fnamenew;
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uint32 stype;
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int i;
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XFILE *fp;
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bool list_changed = force_write;
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static time_t lasttime = 0;
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/* Always dump if we're being told to by a signal. */
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if(force_write == False) {
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if (!lasttime)
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lasttime = t;
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if (t - lasttime < 5)
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return;
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}
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lasttime = t;
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dump_workgroups(force_write);
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for (subrec = FIRST_SUBNET; subrec ; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) {
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if(subrec->work_changed) {
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list_changed = True;
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break;
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}
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}
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if(!list_changed)
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return;
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updatecount++;
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pstrcpy(fname,lp_lockdir());
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trim_char(fname,'\0' ,'/');
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pstrcat(fname,"/");
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pstrcat(fname,SERVER_LIST);
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pstrcpy(fnamenew,fname);
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pstrcat(fnamenew,".");
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fp = x_fopen(fnamenew,O_WRONLY|O_CREAT|O_TRUNC, 0644);
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if (!fp) {
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DEBUG(0,("write_browse_list: Can't open file %s. Error was %s\n",
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fnamenew,strerror(errno)));
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return;
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}
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/*
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* Write out a record for our workgroup. Use the record from the first
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* subnet.
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*/
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if((work = find_workgroup_on_subnet(FIRST_SUBNET, lp_workgroup())) == NULL) {
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DEBUG(0,("write_browse_list: Fatal error - cannot find my workgroup %s\n",
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lp_workgroup()));
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x_fclose(fp);
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return;
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}
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write_browse_list_entry(fp, work->work_group,
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SV_TYPE_DOMAIN_ENUM|SV_TYPE_NT|SV_TYPE_LOCAL_LIST_ONLY,
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work->local_master_browser_name, work->work_group);
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/*
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* We need to do something special for our own names.
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* This is due to the fact that we may be a local master browser on
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* one of our broadcast subnets, and a domain master on the unicast
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* subnet. We iterate over the subnets and only write out the name
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* once.
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*/
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for (i=0; my_netbios_names(i); i++) {
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stype = 0;
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for (subrec = FIRST_SUBNET; subrec ; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) {
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if((work = find_workgroup_on_subnet( subrec, lp_workgroup() )) == NULL)
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continue;
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if((servrec = find_server_in_workgroup( work, my_netbios_names(i))) == NULL)
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continue;
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stype |= servrec->serv.type;
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}
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/* Output server details, plus what workgroup they're in. */
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write_browse_list_entry(fp, my_netbios_names(i), stype,
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string_truncate(lp_serverstring(), MAX_SERVER_STRING_LENGTH), lp_workgroup());
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}
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for (subrec = FIRST_SUBNET; subrec ; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) {
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subrec->work_changed = False;
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for (work = subrec->workgrouplist; work ; work = work->next) {
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/* Write out a workgroup record for a workgroup. */
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uint32 wg_type = write_this_workgroup_name( subrec, work);
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if(wg_type) {
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write_browse_list_entry(fp, work->work_group, wg_type,
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work->local_master_browser_name,
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work->work_group);
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}
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/* Now write out any server records a workgroup may have. */
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for (servrec = work->serverlist; servrec ; servrec = servrec->next) {
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uint32 serv_type;
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/* We have already written our names here. */
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if(is_myname(servrec->serv.name))
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continue;
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serv_type = write_this_server_name(subrec, work, servrec);
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if(serv_type) {
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/* Output server details, plus what workgroup they're in. */
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write_browse_list_entry(fp, servrec->serv.name, serv_type,
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servrec->serv.comment, work->work_group);
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}
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}
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}
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}
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x_fclose(fp);
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unlink(fname);
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chmod(fnamenew,0644);
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rename(fnamenew,fname);
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DEBUG(3,("write_browse_list: Wrote browse list into file %s\n",fname));
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}
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