summaryrefslogtreecommitdiffstats
path: root/source/namedbsubnet.c
diff options
context:
space:
mode:
Diffstat (limited to 'source/namedbsubnet.c')
-rw-r--r--source/namedbsubnet.c326
1 files changed, 326 insertions, 0 deletions
diff --git a/source/namedbsubnet.c b/source/namedbsubnet.c
new file mode 100644
index 00000000000..a259f25393a
--- /dev/null
+++ b/source/namedbsubnet.c
@@ -0,0 +1,326 @@
+/*
+ Unix SMB/Netbios implementation.
+ Version 1.9.
+ NBT netbios routines and daemon - version 2
+ Copyright (C) Andrew Tridgell 1994-1996
+
+ 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
+
+ 04 jul 96: lkcl@pires.co.uk
+ created module namedbsubnet containing subnet database functions
+
+*/
+
+#include "includes.h"
+#include "smb.h"
+
+extern int ClientNMB;
+extern int ClientDGRAM;
+
+extern int DEBUGLEVEL;
+
+extern struct in_addr ipgrp;
+extern struct in_addr ipzero;
+
+extern pstring myname;
+
+BOOL updatedlists = True;
+int updatecount = 0;
+
+/* local interfaces structure */
+extern struct interface *local_interfaces;
+
+/* this is our domain/workgroup/server database */
+struct subnet_record *subnetlist = NULL;
+
+
+/****************************************************************************
+ add a domain into the list
+ **************************************************************************/
+static void add_subnet(struct subnet_record *d)
+{
+ struct subnet_record *d2;
+
+ if (!subnetlist)
+ {
+ subnetlist = d;
+ d->prev = NULL;
+ d->next = NULL;
+ return;
+ }
+
+ for (d2 = subnetlist; d2->next; d2 = d2->next);
+
+ d2->next = d;
+ d->next = NULL;
+ d->prev = d2;
+}
+
+
+/****************************************************************************
+ find a subnet in the subnetlist
+ **************************************************************************/
+struct subnet_record *find_subnet(struct in_addr bcast_ip)
+{
+ struct subnet_record *d;
+ struct in_addr wins_ip = ipgrp;
+
+ /* search through subnet list for broadcast/netmask that matches
+ the source ip address. a subnet 255.255.255.255 represents the
+ WINS list. */
+
+ for (d = subnetlist; d; d = d->next)
+ {
+ if (ip_equal(bcast_ip, wins_ip))
+ {
+ if (ip_equal(bcast_ip, d->bcast_ip))
+ {
+ return d;
+ }
+ }
+ else if (same_net(bcast_ip, d->bcast_ip, d->mask_ip))
+ {
+ return(d);
+ }
+ }
+
+ return (NULL);
+}
+
+
+/****************************************************************************
+ finds the appropriate subnet structure. directed packets (non-bcast) are
+ assumed to come from a point-to-point (P or M node), and so the subnet we
+ return in this instance is the WINS 'pseudo-subnet' with ip 255.255.255.255
+ ****************************************************************************/
+struct subnet_record *find_req_subnet(struct in_addr ip, BOOL bcast)
+{
+ if (bcast)
+ {
+ /* identify the subnet the broadcast request came from */
+ return find_subnet(*iface_bcast(ip));
+ }
+ /* find the subnet under the pseudo-ip of 255.255.255.255 */
+ return find_subnet(ipgrp);
+}
+
+
+/****************************************************************************
+ create a domain entry
+ ****************************************************************************/
+static struct subnet_record *make_subnet(struct in_addr bcast_ip, struct in_addr mask_ip)
+{
+ struct subnet_record *d;
+ d = (struct subnet_record *)malloc(sizeof(*d));
+
+ if (!d) return(NULL);
+
+ bzero((char *)d,sizeof(*d));
+
+ DEBUG(4, ("making subnet %s ", inet_ntoa(bcast_ip)));
+ DEBUG(4, ("%s\n", inet_ntoa(mask_ip)));
+
+ d->bcast_ip = bcast_ip;
+ d->mask_ip = mask_ip;
+ d->workgrouplist = NULL;
+
+ add_subnet(d);
+
+ return d;
+}
+
+
+/****************************************************************************
+ add the remote interfaces from lp_interfaces()
+ to the netbios subnet database.
+ ****************************************************************************/
+void add_subnet_interfaces(void)
+{
+ struct interface *i;
+
+ /* loop on all local interfaces */
+ for (i = local_interfaces; i; i = i->next)
+ {
+ /* add the interface into our subnet database */
+ if (!find_subnet(i->bcast))
+ {
+ make_subnet(i->bcast,i->nmask);
+ }
+ }
+
+ /* add the pseudo-ip interface for WINS: 255.255.255.255 */
+ if (lp_wins_support())
+ {
+ struct in_addr wins_bcast = ipgrp;
+ struct in_addr wins_nmask = ipzero;
+ make_subnet(wins_bcast, wins_nmask);
+ }
+}
+
+
+
+/****************************************************************************
+ add the default workgroup into my domain
+ **************************************************************************/
+void add_my_subnets(char *group)
+{
+ struct interface *i;
+
+ /* add or find domain on our local subnet, in the default workgroup */
+
+ if (*group == '*') return;
+
+ /* the coding choice is up to you, andrew: i can see why you don't want
+ global access to the local_interfaces structure: so it can't get
+ messed up! */
+ for (i = local_interfaces; i; i = i->next)
+ {
+ add_subnet_entry(i->bcast,i->nmask,group, True, False);
+ }
+}
+
+
+/****************************************************************************
+ add a domain entry. creates a workgroup, if necessary, and adds the domain
+ to the named a workgroup.
+ ****************************************************************************/
+struct subnet_record *add_subnet_entry(struct in_addr bcast_ip,
+ struct in_addr mask_ip,
+ char *name, BOOL add, BOOL lmhosts)
+{
+ struct subnet_record *d;
+
+ /* XXXX andrew: struct in_addr ip appears not to be referenced at all except
+ in the DEBUG comment. i assume that the DEBUG comment below actually
+ intends to refer to bcast_ip? i don't know.
+
+ struct in_addr ip = ipgrp;
+
+ */
+
+ if (zero_ip(bcast_ip))
+ bcast_ip = *iface_bcast(bcast_ip);
+
+ /* add the domain into our domain database */
+ if ((d = find_subnet(bcast_ip)) ||
+ (d = make_subnet(bcast_ip, mask_ip)))
+ {
+ struct work_record *w = find_workgroupstruct(d, name, add);
+ extern pstring ServerComment;
+
+ if (!w) return NULL;
+
+ /* add WORKGROUP(1e) and WORKGROUP(00) entries into name database
+ or register with WINS server, if it's our workgroup */
+ if (strequal(lp_workgroup(), name))
+ {
+ add_my_name_entry(d,name,0x1e,NB_ACTIVE|NB_GROUP);
+ add_my_name_entry(d,name,0x0 ,NB_ACTIVE|NB_GROUP);
+ }
+ /* add samba server name to workgroup list. don't add
+ lmhosts server entries to local interfaces */
+ if (strequal(lp_workgroup(), name))
+ {
+ add_server_entry(d,w,myname,w->ServerType,0,ServerComment,True);
+ DEBUG(3,("Added server name entry %s at %s\n",
+ name,inet_ntoa(bcast_ip)));
+ }
+
+ return d;
+ }
+ return NULL;
+}
+
+
+/*******************************************************************
+ write out browse.dat
+ ******************************************************************/
+void write_browse_list(void)
+{
+ struct subnet_record *d;
+ pstring fname,fnamenew;
+ FILE *f;
+
+ static time_t lasttime = 0;
+ time_t t = time(NULL);
+
+ if (!lasttime) lasttime = t;
+ if (!updatedlists || t - lasttime < 5) return;
+
+ lasttime = t;
+ updatedlists = False;
+ updatecount++;
+
+ dump_names();
+ dump_workgroups();
+
+ strcpy(fname,lp_lockdir());
+ trim_string(fname,NULL,"/");
+ strcat(fname,"/");
+ strcat(fname,SERVER_LIST);
+ strcpy(fnamenew,fname);
+ strcat(fnamenew,".");
+
+ f = fopen(fnamenew,"w");
+
+ if (!f)
+ {
+ DEBUG(4,("Can't open %s - %s\n",fnamenew,strerror(errno)));
+ return;
+ }
+
+ for (d = subnetlist; d ; d = d->next)
+ {
+ struct work_record *work;
+ for (work = d->workgrouplist; work ; work = work->next)
+ {
+ struct server_record *s;
+ for (s = work->serverlist; s ; s = s->next)
+ {
+ fstring tmp;
+
+ /* don't list domains I don't have a master for */
+ if ((s->serv.type & SV_TYPE_DOMAIN_ENUM) && !s->serv.comment[0])
+ {
+ continue;
+ }
+
+ /* output server details, plus what workgroup/domain
+ they're in. without the domain information, the
+ combined list of all servers in all workgroups gets
+ sent to anyone asking about any workgroup! */
+
+ sprintf(tmp, "\"%s\"", s->serv.name);
+ fprintf(f, "%-25s ", tmp);
+ fprintf(f, "%08x ", s->serv.type);
+ sprintf(tmp, "\"%s\" ", s->serv.comment);
+ fprintf(f, "%-30s", tmp);
+ fprintf(f, "\"%s\"\n", work->work_group);
+ }
+ }
+ }
+
+ fclose(f);
+ unlink(fname);
+ chmod(fnamenew,0644);
+ rename(fnamenew,fname);
+ DEBUG(3,("Wrote browse list %s\n",fname));
+}
+
generated by cgit (git 2.34.1) at 2024-06-02 19:08:26 +0000