Unix SMB/Netbios implementation.
Version 1.9.
NBT netbios routines and daemon - version 2
- Copyright (C) Andrew Tridgell 1994-1997
- Copyright (C) Luke Kenneth Casson Leighton 1994-1997
- Copyright (C) Jeremy Allison 1994-1997
+ 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
extern int DEBUGLEVEL;
-extern pstring myname;
-extern fstring myworkgroup;
+extern pstring global_myname;
+extern fstring global_myworkgroup;
+extern BOOL found_lm_clients;
#if 0
/* For a host announce the workgroup name is the destination name. */
work_name = dgram->dest_name.name;
+ /*
+ * Syntax servers version 5.1 send HostAnnounce packets to
+ * *THE WRONG NAME*. They send to LOCAL_MASTER_BROWSER_NAME<00>
+ * instead of WORKGROUP<1d> name. So to fix this we check if
+ * the workgroup name is our own name, and if so change it
+ * to be our primary workgroup name.
+ */
+
+ if(strequal(work_name, global_myname))
+ work_name = global_myworkgroup;
+
/*
* We are being very agressive here in adding a workgroup
* name on the basis of a host announcing itself as being
* announce instead ? JRA.
*/
- if ((work = find_workgroup_on_subnet(subrec, work_name))==NULL)
+ work = find_workgroup_on_subnet(subrec, work_name);
+
+ if(servertype != 0)
{
- /* We have no record of this workgroup. Add it. */
- if((work = create_workgroup_on_subnet(subrec, work_name, ttl))==NULL)
- return;
- }
+ if (work ==NULL )
+ {
+ /* We have no record of this workgroup. Add it. */
+ if((work = create_workgroup_on_subnet(subrec, work_name, ttl))==NULL)
+ return;
+ }
- if((servrec = find_server_in_workgroup( work, announce_name))==NULL)
- {
- /* If this server is not already in the workgroup, add it. */
- create_server_on_workgroup(work, announce_name,
- servertype|SV_TYPE_LOCAL_LIST_ONLY,
- ttl, comment);
+ if((servrec = find_server_in_workgroup( work, announce_name))==NULL)
+ {
+ /* If this server is not already in the workgroup, add it. */
+ create_server_on_workgroup(work, announce_name,
+ servertype|SV_TYPE_LOCAL_LIST_ONLY,
+ ttl, comment);
+ }
+ else
+ {
+ /* Update the record. */
+ servrec->serv.type = servertype|SV_TYPE_LOCAL_LIST_ONLY;
+ update_server_ttl( servrec, ttl);
+ StrnCpy(servrec->serv.comment,comment,sizeof(servrec->serv.comment)-1);
+ }
}
else
{
- /* Update the record. */
- servrec->serv.type = servertype|SV_TYPE_LOCAL_LIST_ONLY;
- update_server_ttl( servrec, ttl);
- StrnCpy(servrec->serv.comment,comment,sizeof(servrec->serv.comment)-1);
+ /*
+ * This server is announcing it is going down. Remove it from the
+ * workgroup.
+ */
+ if(!is_myname(announce_name) && (work != NULL) &&
+ ((servrec = find_server_in_workgroup( work, announce_name))!=NULL)
+ )
+ {
+ remove_server_from_workgroup( work, servrec);
+ }
}
-
subrec->work_changed = True;
}
if(*work->local_master_browser_name == '\0')
{
/* Set the master browser name. */
- StrnCpy(work->local_master_browser_name, master_name,
- sizeof(work->local_master_browser_name)-1);
-
+ set_workgroup_local_master_browser_name( work, master_name );
}
subrec->work_changed = True;
if ((work = find_workgroup_on_subnet(subrec, work_name))==NULL)
{
+ /* Don't bother adding if it's a local master release announce. */
+ if(servertype == 0)
+ return;
+
/* We have no record of this workgroup. Add it. */
if((work = create_workgroup_on_subnet(subrec, work_name, ttl))==NULL)
return;
/* We should demote ourself and force an election. */
- unbecome_local_master_browser( subrec, work);
+ unbecome_local_master_browser( subrec, work, True);
/* The actual election requests are handled in
nmbd_election.c */
-
- work->needelection = True;
return;
}
/* Find the server record on this workgroup. If it doesn't exist, add it. */
- if((servrec = find_server_in_workgroup( work, server_name))==NULL)
+ if(servertype != 0)
{
- /* If this server is not already in the workgroup, add it. */
- create_server_on_workgroup(work, server_name,
- servertype|SV_TYPE_LOCAL_LIST_ONLY,
- ttl, comment);
+ if((servrec = find_server_in_workgroup( work, server_name))==NULL)
+ {
+ /* If this server is not already in the workgroup, add it. */
+ create_server_on_workgroup(work, server_name,
+ servertype|SV_TYPE_LOCAL_LIST_ONLY,
+ ttl, comment);
+ }
+ else
+ {
+ /* Update the record. */
+ servrec->serv.type = servertype|SV_TYPE_LOCAL_LIST_ONLY;
+ update_server_ttl(servrec, ttl);
+ StrnCpy(servrec->serv.comment,comment,sizeof(servrec->serv.comment)-1);
+ }
+
+ set_workgroup_local_master_browser_name( work, server_name );
}
else
{
- /* Update the record. */
- servrec->serv.type = servertype|SV_TYPE_LOCAL_LIST_ONLY;
- update_server_ttl(servrec, ttl);
- StrnCpy(servrec->serv.comment,comment,sizeof(servrec->serv.comment)-1);
+ /*
+ * This server is announcing it is going down. Remove it from the
+ * workgroup.
+ */
+ if(!is_myname(server_name) && (work != NULL) &&
+ ((servrec = find_server_in_workgroup( work, server_name))!=NULL)
+ )
+ {
+ remove_server_from_workgroup( work, servrec);
+ }
}
- /* Set the master browser name. */
- StrnCpy(work->local_master_browser_name, server_name,
- sizeof(work->local_master_browser_name)-1);
-
subrec->work_changed = True;
}
return;
}
- if((work = find_workgroup_on_subnet(subrec, myworkgroup)) == NULL)
+ if((work = find_workgroup_on_subnet(subrec, global_myworkgroup)) == NULL)
{
DEBUG(0,("process_master_browser_announce: Cannot find workgroup %s on subnet %s\n",
- myworkgroup, subrec->subnet_name));
+ global_myworkgroup, subrec->subnet_name));
return;
}
update_browser_death_time(browrec);
}
+/*******************************************************************
+ Process an incoming LanMan host announcement packet.
+*******************************************************************/
+
+void process_lm_host_announce(struct subnet_record *subrec, struct packet_struct *p, char *buf)
+{
+ struct dgram_packet *dgram = &p->packet.dgram;
+ uint32 servertype = IVAL(buf,1);
+ int osmajor=CVAL(buf,5); /* major version of node software */
+ int osminor=CVAL(buf,6); /* minor version of node software */
+ int ttl = SVAL(buf,7);
+ char *announce_name = buf+9;
+ struct work_record *work;
+ struct server_record *servrec;
+ char *work_name;
+ char *source_name = dgram->source_name.name;
+ pstring comment;
+ char *s = buf+9;
+
+ s = skip_string(s,1);
+ StrnCpy(comment, s, 43);
+
+ DEBUG(3,("process_lm_host_announce: LM Announcement from %s<%02x> IP %s to \
+%s for server %s.\n", source_name, source_name[15], inet_ntoa(p->ip),
+ namestr(&dgram->dest_name),announce_name));
+
+ DEBUG(5,("process_lm_host_announce: os=(%d,%d) ttl=%d server type=%08x comment=%s\n",
+ osmajor, osminor, ttl, servertype,comment));
+
+ if ((osmajor < 36) || (osmajor > 38) || (osminor !=0))
+ {
+ DEBUG(5,("process_lm_host_announce: LM Announcement packet does not \
+originate from OS/2 Warp client. Ignoring packet.\n"));
+ /* Could have been from a Windows machine (with its LM Announce enabled),
+ or a Samba server. Then don't disrupt the current browse list. */
+ return;
+ }
+
+ /* Filter servertype to remove impossible bits. */
+ servertype &= ~(SV_TYPE_LOCAL_LIST_ONLY|SV_TYPE_DOMAIN_ENUM);
+
+ /* A LanMan host announcement must be sent to the name WORKGROUP<00>. */
+ if(dgram->dest_name.name_type != 0x00)
+ {
+ DEBUG(2,("process_lm_host_announce: incorrect name type for destination from IP %s \
+(was %02x) should be 0x00. Allowing packet anyway.\n",
+ inet_ntoa(p->ip), dgram->dest_name.name_type));
+ /* Change it so it was. */
+ dgram->dest_name.name_type = 0x00;
+ }
+
+ /* For a LanMan host announce the workgroup name is the destination name. */
+ work_name = dgram->dest_name.name;
+
+ /*
+ * Syntax servers version 5.1 send HostAnnounce packets to
+ * *THE WRONG NAME*. They send to LOCAL_MASTER_BROWSER_NAME<00>
+ * instead of WORKGROUP<1d> name. So to fix this we check if
+ * the workgroup name is our own name, and if so change it
+ * to be our primary workgroup name. This code is probably
+ * not needed in the LanMan announce code, but it won't hurt.
+ */
+
+ if(strequal(work_name, global_myname))
+ work_name = global_myworkgroup;
+
+ /*
+ * We are being very agressive here in adding a workgroup
+ * name on the basis of a host announcing itself as being
+ * in that workgroup. Maybe we should wait for the workgroup
+ * announce instead ? JRA.
+ */
+
+ work = find_workgroup_on_subnet(subrec, work_name);
+
+ if(servertype != 0)
+ {
+ if (work == NULL)
+ {
+ /* We have no record of this workgroup. Add it. */
+ if((work = create_workgroup_on_subnet(subrec, work_name, ttl))==NULL)
+ return;
+ }
+
+ if((servrec = find_server_in_workgroup( work, announce_name))==NULL)
+ {
+ /* If this server is not already in the workgroup, add it. */
+ create_server_on_workgroup(work, announce_name,
+ servertype|SV_TYPE_LOCAL_LIST_ONLY,
+ ttl, comment);
+ }
+ else
+ {
+ /* Update the record. */
+ servrec->serv.type = servertype|SV_TYPE_LOCAL_LIST_ONLY;
+ update_server_ttl( servrec, ttl);
+ StrnCpy(servrec->serv.comment,comment,sizeof(servrec->serv.comment)-1);
+ }
+ }
+ else
+ {
+ /*
+ * This server is announcing it is going down. Remove it from the
+ * workgroup.
+ */
+ if(!is_myname(announce_name) && (work != NULL) &&
+ ((servrec = find_server_in_workgroup( work, announce_name))!=NULL)
+ )
+ {
+ remove_server_from_workgroup( work, servrec);
+ }
+ }
+
+ subrec->work_changed = True;
+ found_lm_clients = True;
+}
+
/****************************************************************************
Send a backup list response.
*****************************************************************************/
-
static void send_backup_list_response(struct subnet_record *subrec,
- struct work_record *work,
- struct nmb_name *send_to_name,
- unsigned char max_number_requested,
- uint32 token, struct in_addr sendto_ip)
+ struct work_record *work,
+ struct nmb_name *send_to_name,
+ unsigned char max_number_requested,
+ uint32 token, struct in_addr sendto_ip,
+ int port)
{
char outbuf[1024];
- char *p, *countptr, *nameptr;
- int count = 0;
+ char *p, *countptr;
+ unsigned int count = 0;
int len;
struct server_record *servrec;
SIVAL(p,0,token); /* The sender's unique info. */
p += 4;
- nameptr = p;
-
/* We always return at least one name - our own. */
count = 1;
- StrnCpy(p,myname,15);
+ StrnCpy(p,global_myname,15);
strupper(p);
p = skip_string(p,1);
if((sizeof(outbuf) - len) < 16)
break;
- if(count >= max_number_requested)
+ if(count >= (unsigned int)max_number_requested)
break;
- if(strnequal(servrec->serv.name, myname,15))
+ if(strnequal(servrec->serv.name, global_myname,15))
continue;
if(!(servrec->serv.type & SV_TYPE_BACKUP_BROWSER))
send_mailslot(True, BROWSE_MAILSLOT,
outbuf,PTR_DIFF(p,outbuf),
- myname, 0,
+ global_myname, 0,
send_to_name->name,0,
- sendto_ip, subrec->myip);
+ sendto_ip, subrec->myip, port);
}
/*******************************************************************
for the requested workgroup. That means it must be our
workgroup. */
- if(strequal(workgroup_name, myworkgroup) == False)
+ if(strequal(workgroup_name, global_myworkgroup) == False)
{
DEBUG(7,("process_get_backup_list_request: Ignoring announce request for workgroup %s.\n",
workgroup_name));
}
send_backup_list_response(subrec, work, &dgram->source_name,
- max_number_requested, token, p->ip);
+ max_number_requested, token, p->ip, p->port);
}
/*******************************************************************
for (work = sr->workgrouplist; work; work = work->next)
{
if (AM_LOCAL_MASTER_BROWSER(work))
- {
- unbecome_local_master_browser(sr, work);
- work->needelection = True;
- }
+ unbecome_local_master_browser(sr, work, True);
}
}
}
}
/*******************************************************************
- Process a announcement request packet.
+ Process an announcement request packet.
We don't respond immediately, we just check it's a request for
- out workgroup and then set the flag telling the announce code
+ our workgroup and then set the flag telling the announce code
in nmbd_sendannounce.c:announce_my_server_names that an
announcement is needed soon.
- ******************************************************************/
+******************************************************************/
void process_announce_request(struct subnet_record *subrec, struct packet_struct *p, char *buf)
{
namestr(&dgram->dest_name)));
/* We only send announcement requests on our workgroup. */
- if(strequal(workgroup_name, myworkgroup) == False)
+ if(strequal(workgroup_name, global_myworkgroup) == False)
{
DEBUG(7,("process_announce_request: Ignoring announce request for workgroup %s.\n",
workgroup_name));
work->needannounce = True;
}
+
+/*******************************************************************
+ Process a LanMan announcement request packet.
+ We don't respond immediately, we just check it's a request for
+ our workgroup and then set the flag telling that we have found
+ a LanMan client (DOS or OS/2) and that we will have to start
+ sending LanMan announcements (unless specifically disabled
+ through the "lm announce" parameter in smb.conf)
+******************************************************************/
+
+void process_lm_announce_request(struct subnet_record *subrec, struct packet_struct *p, char *buf)
+{
+ struct dgram_packet *dgram = &p->packet.dgram;
+ char *workgroup_name = dgram->dest_name.name;
+
+ DEBUG(3,("process_lm_announce_request: Announce request from %s IP %s to %s.\n",
+ namestr(&dgram->source_name), inet_ntoa(p->ip),
+ namestr(&dgram->dest_name)));
+
+ /* We only send announcement requests on our workgroup. */
+ if(strequal(workgroup_name, global_myworkgroup) == False)
+ {
+ DEBUG(7,("process_lm_announce_request: Ignoring announce request for workgroup %s.\n",
+ workgroup_name));
+ return;
+ }
+
+ if(find_workgroup_on_subnet(subrec, workgroup_name) == NULL)
+ {
+ DEBUG(0,("process_announce_request: Unable to find workgroup %s on subnet !\n",
+ workgroup_name));
+ return;
+ }
+
+ found_lm_clients = True;
+}
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