--- /dev/null
+/*
+ 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 int ClientNMB;
+
+int updatecount = 0;
+
+/*******************************************************************
+ Remove all the servers in a work group.
+ ******************************************************************/
+
+void remove_all_servers(struct work_record *work)
+{
+ struct server_record *servrec;
+ struct server_record *nexts;
+
+ for (servrec = work->serverlist; servrec; servrec = nexts) {
+ DEBUG(7,("remove_all_servers: Removing server %s\n",servrec->serv.name));
+ nexts = servrec->next;
+
+ if (servrec->prev)
+ servrec->prev->next = servrec->next;
+ if (servrec->next)
+ servrec->next->prev = servrec->prev;
+
+ if (work->serverlist == servrec)
+ work->serverlist = servrec->next;
+
+ ZERO_STRUCTP(servrec);
+ SAFE_FREE(servrec);
+ }
+
+ work->subnet->work_changed = True;
+}
+
+/***************************************************************************
+ Add a server into the a workgroup serverlist.
+ **************************************************************************/
+
+static void add_server_to_workgroup(struct work_record *work,
+ struct server_record *servrec)
+{
+ struct server_record *servrec2;
+
+ if (!work->serverlist) {
+ work->serverlist = servrec;
+ servrec->prev = NULL;
+ servrec->next = NULL;
+ return;
+ }
+
+ for (servrec2 = work->serverlist; servrec2->next; servrec2 = servrec2->next)
+ ;
+
+ servrec2->next = servrec;
+ servrec->next = NULL;
+ servrec->prev = servrec2;
+ work->subnet->work_changed = True;
+}
+
+/****************************************************************************
+ Find a server in a server list.
+ **************************************************************************/
+
+struct server_record *find_server_in_workgroup(struct work_record *work, const char *name)
+{
+ struct server_record *ret;
+
+ for (ret = work->serverlist; ret; ret = ret->next) {
+ if (strequal(ret->serv.name,name))
+ return ret;
+ }
+ return NULL;
+}
+
+
+/****************************************************************************
+ Remove a server entry from this workgroup.
+ ****************************************************************************/
+
+void remove_server_from_workgroup(struct work_record *work, struct server_record *servrec)
+{
+ if (servrec->prev)
+ servrec->prev->next = servrec->next;
+ if (servrec->next)
+ servrec->next->prev = servrec->prev;
+
+ if (work->serverlist == servrec)
+ work->serverlist = servrec->next;
+
+ ZERO_STRUCTP(servrec);
+ SAFE_FREE(servrec);
+ work->subnet->work_changed = True;
+}
+
+/****************************************************************************
+ Create a server entry on this workgroup.
+ ****************************************************************************/
+
+struct server_record *create_server_on_workgroup(struct work_record *work,
+ const char *name,int servertype,
+ int ttl, const char *comment)
+{
+ struct server_record *servrec;
+
+ if (name[0] == '*') {
+ DEBUG(7,("create_server_on_workgroup: not adding name starting with '*' (%s)\n",
+ name));
+ return (NULL);
+ }
+
+ if((servrec = find_server_in_workgroup(work, name)) != NULL) {
+ DEBUG(0,("create_server_on_workgroup: Server %s already exists on \
+workgroup %s. This is a bug.\n", name, work->work_group));
+ return NULL;
+ }
+
+ if((servrec = SMB_MALLOC_P(struct server_record)) == NULL) {
+ DEBUG(0,("create_server_entry_on_workgroup: malloc fail !\n"));
+ return NULL;
+ }
+
+ memset((char *)servrec,'\0',sizeof(*servrec));
+
+ servrec->subnet = work->subnet;
+
+ fstrcpy(servrec->serv.name,name);
+ fstrcpy(servrec->serv.comment,comment);
+ strupper_m(servrec->serv.name);
+ servrec->serv.type = servertype;
+
+ update_server_ttl(servrec, ttl);
+
+ add_server_to_workgroup(work, servrec);
+
+ DEBUG(3,("create_server_on_workgroup: Created server entry %s of type %x (%s) on \
+workgroup %s.\n", name,servertype,comment, work->work_group));
+
+ work->subnet->work_changed = True;
+
+ return(servrec);
+}
+
+/*******************************************************************
+ Update the ttl field of a server record.
+*******************************************************************/
+
+void update_server_ttl(struct server_record *servrec, int ttl)
+{
+ if(ttl > lp_max_ttl())
+ ttl = lp_max_ttl();
+
+ if(is_myname(servrec->serv.name))
+ servrec->death_time = PERMANENT_TTL;
+ else
+ servrec->death_time = (ttl != PERMANENT_TTL) ? time(NULL)+(ttl*3) : PERMANENT_TTL;
+
+ servrec->subnet->work_changed = True;
+}
+
+/*******************************************************************
+ Expire old servers in the serverlist. A time of -1 indicates
+ everybody dies except those with a death_time of PERMANENT_TTL (which is 0).
+ This should only be called from expire_workgroups_and_servers().
+ ******************************************************************/
+
+void expire_servers(struct work_record *work, time_t t)
+{
+ struct server_record *servrec;
+ struct server_record *nexts;
+
+ for (servrec = work->serverlist; servrec; servrec = nexts) {
+ nexts = servrec->next;
+
+ if ((servrec->death_time != PERMANENT_TTL) && ((t == -1) || (servrec->death_time < t))) {
+ DEBUG(3,("expire_old_servers: Removing timed out server %s\n",servrec->serv.name));
+ remove_server_from_workgroup(work, servrec);
+ work->subnet->work_changed = True;
+ }
+ }
+}
+
+/*******************************************************************
+ Decide if we should write out a server record for this server.
+ We return zero if we should not. Check if we've already written
+ out this server record from an earlier subnet.
+******************************************************************/
+
+static uint32 write_this_server_name( struct subnet_record *subrec,
+ struct work_record *work,
+ struct server_record *servrec)
+{
+ struct subnet_record *ssub;
+ struct work_record *iwork;
+
+ /* Go through all the subnets we have already seen. */
+ for (ssub = FIRST_SUBNET; ssub != subrec; ssub = NEXT_SUBNET_INCLUDING_UNICAST(ssub)) {
+ for(iwork = ssub->workgrouplist; iwork; iwork = iwork->next) {
+ if(find_server_in_workgroup( iwork, servrec->serv.name) != NULL) {
+ /*
+ * We have already written out this server record, don't
+ * do it again. This gives precedence to servers we have seen
+ * on the broadcast subnets over servers that may have been
+ * added via a sync on the unicast_subet.
+ *
+ * The correct way to do this is to have a serverlist file
+ * per subnet - this means changes to smbd as well. I may
+ * add this at a later date (JRA).
+ */
+
+ return 0;
+ }
+ }
+ }
+
+ return servrec->serv.type;
+}
+
+/*******************************************************************
+ Decide if we should write out a workgroup record for this workgroup.
+ We return zero if we should not. Don't write out lp_workgroup() (we've
+ already done it) and also don't write out a second workgroup record
+ on the unicast subnet that we've already written out on one of the
+ broadcast subnets.
+******************************************************************/
+
+static uint32 write_this_workgroup_name( struct subnet_record *subrec,
+ struct work_record *work)
+{
+ struct subnet_record *ssub;
+
+ if(strequal(lp_workgroup(), work->work_group))
+ return 0;
+
+ /* This is a workgroup we have seen on a broadcast subnet. All
+ these have the same type. */
+
+ if(subrec != unicast_subnet)
+ return (SV_TYPE_DOMAIN_ENUM|SV_TYPE_NT|SV_TYPE_LOCAL_LIST_ONLY);
+
+ for(ssub = FIRST_SUBNET; ssub; ssub = NEXT_SUBNET_EXCLUDING_UNICAST(ssub)) {
+ /* This is the unicast subnet so check if we've already written out
+ this subnet when we passed over the broadcast subnets. */
+
+ if(find_workgroup_on_subnet( ssub, work->work_group) != NULL)
+ return 0;
+ }
+
+ /* All workgroups on the unicast subnet (except our own, which we
+ have already written out) cannot be local. */
+
+ return (SV_TYPE_DOMAIN_ENUM|SV_TYPE_NT);
+}
+
+/*******************************************************************
+ Write out the browse.dat file.
+ ******************************************************************/
+
+void write_browse_list_entry(XFILE *fp, const char *name, uint32 rec_type,
+ const char *local_master_browser_name, const char *description)
+{
+ fstring tmp;
+
+ slprintf(tmp,sizeof(tmp)-1, "\"%s\"", name);
+ x_fprintf(fp, "%-25s ", tmp);
+ x_fprintf(fp, "%08x ", rec_type);
+ slprintf(tmp, sizeof(tmp)-1, "\"%s\" ", local_master_browser_name);
+ x_fprintf(fp, "%-30s", tmp);
+ x_fprintf(fp, "\"%s\"\n", description);
+}
+
+void write_browse_list(time_t t, BOOL force_write)
+{
+ struct subnet_record *subrec;
+ struct work_record *work;
+ struct server_record *servrec;
+ pstring fname,fnamenew;
+ uint32 stype;
+ int i;
+ XFILE *fp;
+ BOOL list_changed = force_write;
+ static time_t lasttime = 0;
+
+ /* Always dump if we're being told to by a signal. */
+ if(force_write == False) {
+ if (!lasttime)
+ lasttime = t;
+ if (t - lasttime < 5)
+ return;
+ }
+
+ lasttime = t;
+
+ dump_workgroups(force_write);
+
+ for (subrec = FIRST_SUBNET; subrec ; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) {
+ if(subrec->work_changed) {
+ list_changed = True;
+ break;
+ }
+ }
+
+ if(!list_changed)
+ return;
+
+ updatecount++;
+
+ pstrcpy(fname,lp_lockdir());
+ trim_char(fname,'\0' ,'/');
+ pstrcat(fname,"/");
+ pstrcat(fname,SERVER_LIST);
+ pstrcpy(fnamenew,fname);
+ pstrcat(fnamenew,".");
+
+ fp = x_fopen(fnamenew,O_WRONLY|O_CREAT|O_TRUNC, 0644);
+
+ if (!fp) {
+ DEBUG(0,("write_browse_list: Can't open file %s. Error was %s\n",
+ fnamenew,strerror(errno)));
+ return;
+ }
+
+ /*
+ * Write out a record for our workgroup. Use the record from the first
+ * subnet.
+ */
+
+ if((work = find_workgroup_on_subnet(FIRST_SUBNET, lp_workgroup())) == NULL) {
+ DEBUG(0,("write_browse_list: Fatal error - cannot find my workgroup %s\n",
+ lp_workgroup()));
+ x_fclose(fp);
+ return;
+ }
+
+ write_browse_list_entry(fp, work->work_group,
+ SV_TYPE_DOMAIN_ENUM|SV_TYPE_NT|SV_TYPE_LOCAL_LIST_ONLY,
+ work->local_master_browser_name, work->work_group);
+
+ /*
+ * We need to do something special for our own names.
+ * This is due to the fact that we may be a local master browser on
+ * one of our broadcast subnets, and a domain master on the unicast
+ * subnet. We iterate over the subnets and only write out the name
+ * once.
+ */
+
+ for (i=0; my_netbios_names(i); i++) {
+ stype = 0;
+ for (subrec = FIRST_SUBNET; subrec ; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) {
+ if((work = find_workgroup_on_subnet( subrec, lp_workgroup() )) == NULL)
+ continue;
+ if((servrec = find_server_in_workgroup( work, my_netbios_names(i))) == NULL)
+ continue;
+
+ stype |= servrec->serv.type;
+ }
+
+ /* Output server details, plus what workgroup they're in. */
+ write_browse_list_entry(fp, my_netbios_names(i), stype,
+ string_truncate(lp_serverstring(), MAX_SERVER_STRING_LENGTH), lp_workgroup());
+ }
+
+ for (subrec = FIRST_SUBNET; subrec ; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) {
+ subrec->work_changed = False;
+
+ for (work = subrec->workgrouplist; work ; work = work->next) {
+ /* Write out a workgroup record for a workgroup. */
+ uint32 wg_type = write_this_workgroup_name( subrec, work);
+
+ if(wg_type) {
+ write_browse_list_entry(fp, work->work_group, wg_type,
+ work->local_master_browser_name,
+ work->work_group);
+ }
+
+ /* Now write out any server records a workgroup may have. */
+
+ for (servrec = work->serverlist; servrec ; servrec = servrec->next) {
+ uint32 serv_type;
+
+ /* We have already written our names here. */
+ if(is_myname(servrec->serv.name))
+ continue;
+
+ serv_type = write_this_server_name(subrec, work, servrec);
+ if(serv_type) {
+ /* Output server details, plus what workgroup they're in. */
+ write_browse_list_entry(fp, servrec->serv.name, serv_type,
+ servrec->serv.comment, work->work_group);
+ }
+ }
+ }
+ }
+
+ x_fclose(fp);
+ unlink(fname);
+ chmod(fnamenew,0644);
+ rename(fnamenew,fname);
+ DEBUG(3,("write_browse_list: Wrote browse list into file %s\n",fname));
+}
projects / samba / blobdiff