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authorStefan Metzmacher <metze@samba.org>2004-05-24 17:41:47 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 12:56:12 -0500
commit7fb1be73734915e027f86aca9ba62b86c56ca787 (patch)
treeb66be4fc8eedb1ed5c20bbc29493e3a6353bcfff /source4/nmbd/nmbd_winsserver.c
parentf1a8a690fcd9e8824dade9278e83902a6229b092 (diff)
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r853: remove a real big bunch of unused code
I really think that this is needed to get a better overview of what is currently used Also this stuff is really out of date so if we really ever need some of this stuff back, a 'svn copy' from the SAMBA_3_0 branch should be no big problem... metze (This used to be commit 972598d511c64f29bdc849fe58c9c82fbcf6a4a2)
Diffstat (limited to 'source4/nmbd/nmbd_winsserver.c')
-rw-r--r--source4/nmbd/nmbd_winsserver.c2032
1 files changed, 0 insertions, 2032 deletions
diff --git a/source4/nmbd/nmbd_winsserver.c b/source4/nmbd/nmbd_winsserver.c
deleted file mode 100644
index 6d1f654e84..0000000000
--- a/source4/nmbd/nmbd_winsserver.c
+++ /dev/null
@@ -1,2032 +0,0 @@
-/*
- Unix SMB/CIFS implementation.
- NBT netbios routines and daemon - version 2
-
- 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"
-
-#define WINS_LIST "wins.tdb"
-#define WINS_VERSION 1
-
-/****************************************************************************
-change the wins owner address in the record.
-*****************************************************************************/
-static void update_wins_owner(struct name_record *namerec, struct in_addr wins_ip)
-{
- if (namerec==NULL)
- return;
- namerec->data.wins_ip=wins_ip;
-}
-
-/****************************************************************************
-create the wins flags based on the nb flags and the input value.
-*****************************************************************************/
-static void update_wins_flag(struct name_record *namerec, int flags)
-{
- if (namerec==NULL)
- return;
-
- namerec->data.wins_flags=0x0;
-
- /* if it's a group, it can be a normal or a special one */
- if (namerec->data.nb_flags & NB_GROUP) {
- if (namerec->name.name_type==0x1C)
- namerec->data.wins_flags|=WINS_SGROUP;
- else
- if (namerec->data.num_ips>1)
- namerec->data.wins_flags|=WINS_SGROUP;
- else
- namerec->data.wins_flags|=WINS_NGROUP;
- } else {
- /* can be unique or multi-homed */
- if (namerec->data.num_ips>1)
- namerec->data.wins_flags|=WINS_MHOMED;
- else
- namerec->data.wins_flags|=WINS_UNIQUE;
- }
-
- /* the node type are the same bits */
- namerec->data.wins_flags|=namerec->data.nb_flags&NB_NODETYPEMASK;
-
- /* the static bit is elsewhere */
- if (namerec->data.death_time == PERMANENT_TTL)
- namerec->data.wins_flags|=WINS_STATIC;
-
- /* and add the given bits */
- namerec->data.wins_flags|=flags;
-
- DEBUG(8,("update_wins_flag: nbflags: 0x%x, ttl: 0x%d, flags: 0x%x, winsflags: 0x%x\n",
- namerec->data.nb_flags, (int)namerec->data.death_time, flags, namerec->data.wins_flags));
-
-}
-
-/****************************************************************************
-return the general ID value and increase it if requested
-*****************************************************************************/
-static void get_global_id_and_update(SMB_BIG_UINT *current_id, BOOL update)
-{
- /*
- * it's kept as a static here, to prevent people from messing
- * with the value directly
- */
-
- static SMB_BIG_UINT general_id = 1;
-
- DEBUG(5,("get_global_id_and_update: updating version ID: %d\n", (int)general_id));
-
- *current_id = general_id;
-
- if (update)
- general_id++;
-}
-
-/****************************************************************************
-possibly call the WINS hook external program when a WINS change is made
-*****************************************************************************/
-static void wins_hook(const char *operation, struct name_record *namerec, int ttl)
-{
- pstring command;
- char *cmd = lp_wins_hook();
- char *p;
- int i;
-
- if (!cmd || !*cmd) return;
-
- for (p=namerec->name.name; *p; p++) {
- if (!(isalnum((int)*p) || strchr_m("._-",*p))) {
- DEBUG(3,("not calling wins hook for invalid name %s\n", nmb_namestr(&namerec->name)));
- return;
- }
- }
-
- p = command;
- p += slprintf(p, sizeof(command)-1, "%s %s %s %02x %d",
- cmd,
- operation,
- namerec->name.name,
- namerec->name.name_type,
- ttl);
-
- for (i=0;i<namerec->data.num_ips;i++) {
- p += slprintf(p, sizeof(command) - (p-command) -1, " %s", inet_ntoa(namerec->data.ip[i]));
- }
-
- DEBUG(3,("calling wins hook for %s\n", nmb_namestr(&namerec->name)));
- smbrun(command, NULL);
-}
-
-
-/****************************************************************************
-Determine if this packet should be allocated to the WINS server.
-*****************************************************************************/
-
-BOOL packet_is_for_wins_server(struct packet_struct *packet)
-{
- struct nmb_packet *nmb = &packet->packet.nmb;
-
- /* Only unicast packets go to a WINS server. */
- if((wins_server_subnet == NULL) || (nmb->header.nm_flags.bcast == True))
- {
- DEBUG(10, ("packet_is_for_wins_server: failing WINS test #1.\n"));
- return False;
- }
-
- /* Check for node status requests. */
- if (nmb->question.question_type != QUESTION_TYPE_NB_QUERY)
- return False;
-
- switch(nmb->header.opcode)
- {
- /*
- * A WINS server issues WACKS, not receives them.
- */
- case NMB_WACK_OPCODE:
- DEBUG(10, ("packet_is_for_wins_server: failing WINS test #2 (WACK).\n"));
- return False;
- /*
- * A WINS server only processes registration and
- * release requests, not responses.
- */
- case NMB_NAME_REG_OPCODE:
- case NMB_NAME_MULTIHOMED_REG_OPCODE:
- case NMB_NAME_REFRESH_OPCODE_8: /* ambiguity in rfc1002 about which is correct. */
- case NMB_NAME_REFRESH_OPCODE_9: /* WinNT uses 8 by default. */
- if(nmb->header.response)
- {
- DEBUG(10, ("packet_is_for_wins_server: failing WINS test #3 (response = 1).\n"));
- return False;
- }
- break;
-
- case NMB_NAME_RELEASE_OPCODE:
- if(nmb->header.response)
- {
- DEBUG(10, ("packet_is_for_wins_server: failing WINS test #4 (response = 1).\n"));
- return False;
- }
- break;
-
- /*
- * Only process unicast name queries with rd = 1.
- */
- case NMB_NAME_QUERY_OPCODE:
- if(!nmb->header.response && !nmb->header.nm_flags.recursion_desired)
- {
- DEBUG(10, ("packet_is_for_wins_server: failing WINS test #5 (response = 1).\n"));
- return False;
- }
- break;
- }
-
- return True;
-}
-
-/****************************************************************************
-Utility function to decide what ttl to give a register/refresh request.
-*****************************************************************************/
-
-static int get_ttl_from_packet(struct nmb_packet *nmb)
-{
- int ttl = nmb->additional->ttl;
-
- if(ttl < lp_min_wins_ttl() )
- ttl = lp_min_wins_ttl();
-
- if(ttl > lp_max_wins_ttl() )
- ttl = lp_max_wins_ttl();
-
- return ttl;
-}
-
-/****************************************************************************
-Load or create the WINS database.
-*****************************************************************************/
-
-BOOL initialise_wins(void)
-{
- time_t time_now = time(NULL);
- TDB_CONTEXT *tdb;
- TDB_DATA kbuf, dbuf, newkey;
- struct name_record *namerec = NULL;
- struct in_addr our_fake_ip = *interpret_addr2("0.0.0.0");
-
- DEBUG(2,("initialise_wins: started\n"));
-
- if(!lp_we_are_a_wins_server())
- return True;
-
- add_samba_names_to_subnet(wins_server_subnet);
-
- tdb = tdb_open_log(lock_path(WINS_LIST), 0, TDB_DEFAULT, O_RDONLY, 0600);
- if (!tdb) {
- DEBUG(2,("initialise_wins: Can't open wins database file %s. Error was %s\n", WINS_LIST, strerror(errno) ));
- return True;
- }
-
- if (tdb_fetch_int32(tdb, INFO_VERSION) != WINS_VERSION) {
- DEBUG(0,("Discarding invalid wins.dat file\n"));
- tdb_close(tdb);
- return True;
- }
-
- for (kbuf = tdb_firstkey(tdb);
- kbuf.dptr;
- newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) {
-
- fstring name_type;
- pstring name, ip_str;
- char *p;
- int type = 0;
- int nb_flags;
- int ttl;
- unsigned int num_ips;
- int high, low;
- struct in_addr wins_ip;
- struct in_addr *ip_list;
- int wins_flags;
- int len,i;
-
- if (strncmp(kbuf.dptr, ENTRY_PREFIX, strlen(ENTRY_PREFIX)) != 0)
- continue;
-
- dbuf = tdb_fetch(tdb, kbuf);
- if (!dbuf.dptr)
- continue;
-
- fstrcpy(name_type, kbuf.dptr+strlen(ENTRY_PREFIX));
-
- pstrcpy(name, name_type);
-
- if((p = strchr(name,'#')) != NULL) {
- *p = 0;
- sscanf(p+1,"%x",&type);
- }
-
- len = tdb_unpack(dbuf.dptr, dbuf.dsize, "dddfddd",
- &nb_flags, &high, &low,
- ip_str, &ttl, &num_ips, &wins_flags);
-
- wins_ip=*interpret_addr2(ip_str);
-
- /* Don't reload replica records */
- if (!ip_equal(wins_ip, our_fake_ip)) {
- SAFE_FREE(dbuf.dptr);
- continue;
- }
-
- /* Don't reload released or tombstoned records */
- if ((wins_flags&WINS_STATE_MASK) != WINS_ACTIVE) {
- SAFE_FREE(dbuf.dptr);
- continue;
- }
-
- /* Allocate the space for the ip_list. */
- if((ip_list = (struct in_addr *)malloc( num_ips * sizeof(struct in_addr))) == NULL) {
- SAFE_FREE(dbuf.dptr);
- DEBUG(0,("initialise_wins: Malloc fail !\n"));
- return False;
- }
-
- for (i = 0; i < num_ips; i++) {
- len += tdb_unpack(dbuf.dptr+len, dbuf.dsize-len, "f", ip_str);
- ip_list[i] = *interpret_addr2(ip_str);
- }
-
- /* add all entries that have 60 seconds or more to live */
- if ((ttl - 60) > time_now || ttl == PERMANENT_TTL) {
- if(ttl != PERMANENT_TTL)
- ttl -= time_now;
-
- DEBUG( 4, ("initialise_wins: add name: %s#%02x ttl = %d first IP %s flags = %2x\n",
- name, type, ttl, inet_ntoa(ip_list[0]), nb_flags));
-
- namerec=add_name_to_subnet( wins_server_subnet, name, type, nb_flags,
- ttl, REGISTER_NAME, num_ips, ip_list);
- if (namerec!=NULL) {
- update_wins_owner(namerec, wins_ip);
- update_wins_flag(namerec, wins_flags);
- /* we don't reload the ID, on startup we restart at 1 */
- get_global_id_and_update(&namerec->data.id, True);
- }
-
- } else {
- DEBUG(4, ("initialise_wins: not adding name (ttl problem) %s#%02x ttl = %d first IP %s flags = %2x\n",
- name, type, ttl, inet_ntoa(ip_list[0]), nb_flags));
- }
-
- SAFE_FREE(dbuf.dptr);
- SAFE_FREE(ip_list);
- }
-
- tdb_close(tdb);
- DEBUG(2,("initialise_wins: done\n"));
- return True;
-}
-
-/****************************************************************************
-Send a WINS WACK (Wait ACKnowledgement) response.
-**************************************************************************/
-
-static void send_wins_wack_response(int ttl, struct packet_struct *p)
-{
- struct nmb_packet *nmb = &p->packet.nmb;
- unsigned char rdata[2];
-
- rdata[0] = rdata[1] = 0;
-
- /* Taken from nmblib.c - we need to send back almost
- identical bytes from the requesting packet header. */
-
- rdata[0] = (nmb->header.opcode & 0xF) << 3;
- if (nmb->header.nm_flags.authoritative &&
- nmb->header.response) rdata[0] |= 0x4;
- if (nmb->header.nm_flags.trunc) rdata[0] |= 0x2;
- if (nmb->header.nm_flags.recursion_desired) rdata[0] |= 0x1;
- if (nmb->header.nm_flags.recursion_available &&
- nmb->header.response) rdata[1] |= 0x80;
- if (nmb->header.nm_flags.bcast) rdata[1] |= 0x10;
-
- reply_netbios_packet(p, /* Packet to reply to. */
- 0, /* Result code. */
- NMB_WAIT_ACK, /* nmbd type code. */
- NMB_WACK_OPCODE, /* opcode. */
- ttl, /* ttl. */
- (char *)rdata, /* data to send. */
- 2); /* data length. */
-}
-
-/****************************************************************************
-Send a WINS name registration response.
-**************************************************************************/
-
-static void send_wins_name_registration_response(int rcode, int ttl, struct packet_struct *p)
-{
- struct nmb_packet *nmb = &p->packet.nmb;
- char rdata[6];
-
- memcpy(&rdata[0], &nmb->additional->rdata[0], 6);
-
- reply_netbios_packet(p, /* Packet to reply to. */
- rcode, /* Result code. */
- WINS_REG, /* nmbd type code. */
- NMB_NAME_REG_OPCODE, /* opcode. */
- ttl, /* ttl. */
- rdata, /* data to send. */
- 6); /* data length. */
-}
-
-/***********************************************************************
- Deal with a name refresh request to a WINS server.
-************************************************************************/
-
-void wins_process_name_refresh_request(struct subnet_record *subrec,
- struct packet_struct *p)
-{
- struct nmb_packet *nmb = &p->packet.nmb;
- struct nmb_name *question = &nmb->question.question_name;
- BOOL bcast = nmb->header.nm_flags.bcast;
- uint16 nb_flags = get_nb_flags(nmb->additional->rdata);
- BOOL group = (nb_flags & NB_GROUP) ? True : False;
- struct name_record *namerec = NULL;
- int ttl = get_ttl_from_packet(nmb);
- struct in_addr from_ip;
- struct in_addr our_fake_ip = *interpret_addr2("0.0.0.0");
-
- putip((char *)&from_ip,&nmb->additional->rdata[2]);
-
- if(bcast)
- {
- /*
- * We should only get unicast name refresh packets here.
- * Anyone trying to refresh broadcast should not be going to a WINS
- * server. Log an error here.
- */
-
- DEBUG(0,("wins_process_name_refresh_request: broadcast name refresh request \
-received for name %s from IP %s on subnet %s. Error - should not be sent to WINS server\n",
- nmb_namestr(question), inet_ntoa(from_ip), subrec->subnet_name));
- return;
- }
-
- DEBUG(3,("wins_process_name_refresh_request: Name refresh for name %s \
-IP %s\n", nmb_namestr(question), inet_ntoa(from_ip) ));
-
- /*
- * See if the name already exists.
- */
-
- namerec = find_name_on_subnet(subrec, question, FIND_ANY_NAME);
-
- /*
- * If this is a refresh request and the name doesn't exist then
- * treat it like a registration request. This allows us to recover
- * from errors (tridge)
- */
-
- if(namerec == NULL)
- {
- DEBUG(3,("wins_process_name_refresh_request: Name refresh for name %s and \
-the name does not exist. Treating as registration.\n", nmb_namestr(question) ));
- wins_process_name_registration_request(subrec,p);
- return;
- }
-
- /*
- * if the name is present but not active,
- * simply remove it and treat the request
- * as a registration
- */
- if (namerec != NULL && !WINS_STATE_ACTIVE(namerec))
- {
- DEBUG(5,("wins_process_name_refresh_request: Name (%s) in WINS was \
-not active - removing it.\n", nmb_namestr(question) ));
- remove_name_from_namelist( subrec, namerec );
- namerec = NULL;
- wins_process_name_registration_request(subrec,p);
- return;
- }
-
- /*
- * Check that the group bits for the refreshing name and the
- * name in our database match.
- */
-
- if((namerec != NULL) && ((group && !NAME_GROUP(namerec)) || (!group && NAME_GROUP(namerec))) )
- {
- DEBUG(3,("wins_process_name_refresh_request: Name %s group bit = %s \
-does not match group bit in WINS for this name.\n", nmb_namestr(question), group ? "True" : "False" ));
- send_wins_name_registration_response(RFS_ERR, 0, p);
- return;
- }
-
- /*
- * For a unique name check that the person refreshing the name is one of the registered IP
- * addresses. If not - fail the refresh. Do the same for group names with a type of 0x1c.
- * Just return success for unique 0x1d refreshes. For normal group names update the ttl
- * and return success.
- */
-
- if((!group || (group && (question->name_type == 0x1c))) && find_ip_in_name_record(namerec, from_ip ))
- {
- /*
- * Update the ttl.
- */
- update_name_ttl(namerec, ttl);
-
- /*
- * if the record is a replica:
- * we take ownership and update the version ID.
- */
- if (!ip_equal(namerec->data.wins_ip, our_fake_ip)) {
- update_wins_owner(namerec, our_fake_ip);
- get_global_id_and_update(&namerec->data.id, True);
- }
-
- send_wins_name_registration_response(0, ttl, p);
- wins_hook("refresh", namerec, ttl);
- return;
- }
- else if(group)
- {
- /*
- * Normal groups are all registered with an IP address of 255.255.255.255
- * so we can't search for the IP address.
- */
- update_name_ttl(namerec, ttl);
- send_wins_name_registration_response(0, ttl, p);
- return;
- }
- else if(!group && (question->name_type == 0x1d))
- {
- /*
- * Special name type - just pretend the refresh succeeded.
- */
- send_wins_name_registration_response(0, ttl, p);
- return;
- }
- else
- {
- /*
- * Fail the refresh.
- */
-
- DEBUG(3,("wins_process_name_refresh_request: Name refresh for name %s with IP %s and \
-is IP is not known to the name.\n", nmb_namestr(question), inet_ntoa(from_ip) ));
- send_wins_name_registration_response(RFS_ERR, 0, p);
- return;
- }
-}
-
-/***********************************************************************
- Deal with a name registration request query success to a client that
- owned the name.
-
- We have a locked pointer to the original packet stashed away in the
- userdata pointer. The success here is actually a failure as it means
- the client we queried wants to keep the name, so we must return
- a registration failure to the original requestor.
-************************************************************************/
-
-static void wins_register_query_success(struct subnet_record *subrec,
- struct userdata_struct *userdata,
- struct nmb_name *question_name,
- struct in_addr ip,
- struct res_rec *answers)
-{
- struct packet_struct *orig_reg_packet;
-
- memcpy((char *)&orig_reg_packet, userdata->data, sizeof(struct packet_struct *));
-
- DEBUG(3,("wins_register_query_success: Original client at IP %s still wants the \
-name %s. Rejecting registration request.\n", inet_ntoa(ip), nmb_namestr(question_name) ));
-
- send_wins_name_registration_response(RFS_ERR, 0, orig_reg_packet);
-
- orig_reg_packet->locked = False;
- free_packet(orig_reg_packet);
-}
-
-/***********************************************************************
- Deal with a name registration request query failure to a client that
- owned the name.
-
- We have a locked pointer to the original packet stashed away in the
- userdata pointer. The failure here is actually a success as it means
- the client we queried didn't want to keep the name, so we can remove
- the old name record and then successfully add the new name.
-************************************************************************/
-
-static void wins_register_query_fail(struct subnet_record *subrec,
- struct response_record *rrec,
- struct nmb_name *question_name,
- int rcode)
-{
- struct userdata_struct *userdata = rrec->userdata;
- struct packet_struct *orig_reg_packet;
- struct name_record *namerec = NULL;
-
- memcpy((char *)&orig_reg_packet, userdata->data, sizeof(struct packet_struct *));
-
- /*
- * We want to just add the name, as we now know the original owner
- * didn't want it. But we can't just do that as an arbitary
- * amount of time may have taken place between the name query
- * request and this timeout/error response. So we check that
- * the name still exists and is in the same state - if so
- * we remove it and call wins_process_name_registration_request()
- * as we know it will do the right thing now.
- */
-
- namerec = find_name_on_subnet(subrec, question_name, FIND_ANY_NAME);
-
- if( (namerec != NULL)
- && (namerec->data.source == REGISTER_NAME)
- && ip_equal(rrec->packet->ip, *namerec->data.ip) )
- {
- remove_name_from_namelist( subrec, namerec);
- namerec = NULL;
- }
-
- if(namerec == NULL)
- wins_process_name_registration_request(subrec, orig_reg_packet);
- else
- DEBUG(2,("wins_register_query_fail: The state of the WINS database changed between \
-querying for name %s in order to replace it and this reply.\n", nmb_namestr(question_name) ));
-
- orig_reg_packet->locked = False;
- free_packet(orig_reg_packet);
-}
-
-/***********************************************************************
- Deal with a name registration request to a WINS server.
-
- Use the following pseudocode :
-
- registering_group
- |
- |
- +--------name exists
- | |
- | |
- | +--- existing name is group
- | | |
- | | |
- | | +--- add name (return).
- | |
- | |
- | +--- exiting name is unique
- | |
- | |
- | +--- query existing owner (return).
- |
- |
- +--------name doesn't exist
- |
- |
- +--- add name (return).
-
- registering_unique
- |
- |
- +--------name exists
- | |
- | |
- | +--- existing name is group
- | | |
- | | |
- | | +--- fail add (return).
- | |
- | |
- | +--- exiting name is unique
- | |
- | |
- | +--- query existing owner (return).
- |
- |
- +--------name doesn't exist
- |
- |
- +--- add name (return).
-
- As can be seen from the above, the two cases may be collapsed onto each
- other with the exception of the case where the name already exists and
- is a group name. This case we handle with an if statement.
-
-************************************************************************/
-
-void wins_process_name_registration_request(struct subnet_record *subrec,
- struct packet_struct *p)
-{
- struct nmb_packet *nmb = &p->packet.nmb;
- struct nmb_name *question = &nmb->question.question_name;
- BOOL bcast = nmb->header.nm_flags.bcast;
- uint16 nb_flags = get_nb_flags(nmb->additional->rdata);
- int ttl = get_ttl_from_packet(nmb);
- struct name_record *namerec = NULL;
- struct in_addr from_ip;
- BOOL registering_group_name = (nb_flags & NB_GROUP) ? True : False;
- struct in_addr our_fake_ip = *interpret_addr2("0.0.0.0");
-
- putip((char *)&from_ip,&nmb->additional->rdata[2]);
-
- if(bcast)
- {
- /*
- * We should only get unicast name registration packets here.
- * Anyone trying to register broadcast should not be going to a WINS
- * server. Log an error here.
- */
-
- DEBUG(0,("wins_process_name_registration_request: broadcast name registration request \
-received for name %s from IP %s on subnet %s. Error - should not be sent to WINS server\n",
- nmb_namestr(question), inet_ntoa(from_ip), subrec->subnet_name));
- return;
- }
-
- DEBUG(3,("wins_process_name_registration_request: %s name registration for name %s \
-IP %s\n", registering_group_name ? "Group" : "Unique", nmb_namestr(question), inet_ntoa(from_ip) ));
-
- /*
- * See if the name already exists.
- */
-
- namerec = find_name_on_subnet(subrec, question, FIND_ANY_NAME);
-
- /*
- * if the record exists but NOT in active state,
- * consider it dead.
- */
- if ( (namerec != NULL) && !WINS_STATE_ACTIVE(namerec))
- {
- DEBUG(5,("wins_process_name_registration_request: Name (%s) in WINS was \
-not active - removing it.\n", nmb_namestr(question) ));
- remove_name_from_namelist( subrec, namerec );
- namerec = NULL;
- }
-
- /*
- * Deal with the case where the name found was a dns entry.
- * Remove it as we now have a NetBIOS client registering the
- * name.
- */
-
- if( (namerec != NULL)
- && ( (namerec->data.source == DNS_NAME)
- || (namerec->data.source == DNSFAIL_NAME) ) )
- {
- DEBUG(5,("wins_process_name_registration_request: Name (%s) in WINS was \
-a dns lookup - removing it.\n", nmb_namestr(question) ));
- remove_name_from_namelist( subrec, namerec );
- namerec = NULL;
- }
-
- /*
- * Reject if the name exists and is not a REGISTER_NAME.
- * (ie. Don't allow any static names to be overwritten.
- */
-
- if((namerec != NULL) && (namerec->data.source != REGISTER_NAME))
- {
- DEBUG( 3, ( "wins_process_name_registration_request: Attempt \
-to register name %s. Name already exists in WINS with source type %d.\n",
- nmb_namestr(question), namerec->data.source ));
- send_wins_name_registration_response(RFS_ERR, 0, p);
- return;
- }
-
- /*
- * Special policy decisions based on MS documentation.
- * 1). All group names (except names ending in 0x1c) are added as 255.255.255.255.
- * 2). All unique names ending in 0x1d are ignored, although a positive response is sent.
- */
-
- /*
- * A group name is always added as the local broadcast address, except
- * for group names ending in 0x1c.
- * Group names with type 0x1c are registered with individual IP addresses.
- */
-
- if(registering_group_name && (question->name_type != 0x1c))
- from_ip = *interpret_addr2("255.255.255.255");
-
- /*
- * Ignore all attempts to register a unique 0x1d name, although return success.
- */
-
- if(!registering_group_name && (question->name_type == 0x1d))
- {
- DEBUG(3,("wins_process_name_registration_request: Ignoring request \
-to register name %s from IP %s.\n", nmb_namestr(question), inet_ntoa(p->ip) ));
- send_wins_name_registration_response(0, ttl, p);
- return;
- }
-
- /*
- * Next two cases are the 'if statement' mentioned above.
- */
-
- if((namerec != NULL) && NAME_GROUP(namerec))
- {
- if(registering_group_name)
- {
- /*
- * If we are adding a group name, the name exists and is also a group entry just add this
- * IP address to it and update the ttl.
- */
-
- DEBUG(3,("wins_process_name_registration_request: Adding IP %s to group name %s.\n",
- inet_ntoa(from_ip), nmb_namestr(question) ));
- /*
- * Check the ip address is not already in the group.
- */
- if(!find_ip_in_name_record(namerec, from_ip)) {
- add_ip_to_name_record(namerec, from_ip);
- /* we need to update the record for replication */
- get_global_id_and_update(&namerec->data.id, True);
-
- /*
- * if the record is a replica, we must change
- * the wins owner to us to make the replication updates
- * it on the other wins servers.
- * And when the partner will receive this record,
- * it will update its own record.
- */
-
- update_wins_owner(namerec, our_fake_ip);
-
- }
- update_name_ttl(namerec, ttl);
- send_wins_name_registration_response(0, ttl, p);
- return;
- }
- else
- {
- /*
- * If we are adding a unique name, the name exists in the WINS db
- * and is a group name then reject the registration.
- *
- * explanation: groups have a higher priority than unique names.
- */
-
- DEBUG(3,("wins_process_name_registration_request: Attempt to register name %s. Name \
-already exists in WINS as a GROUP name.\n", nmb_namestr(question) ));
- send_wins_name_registration_response(RFS_ERR, 0, p);
- return;
- }
- }
-
- /*
- * From here on down we know that if the name exists in the WINS db it is
- * a unique name, not a group name.
- */
-
- /*
- * If the name exists and is one of our names then check the
- * registering IP address. If it's not one of ours then automatically
- * reject without doing the query - we know we will reject it.
- */
-
- if((namerec != NULL) && (is_myname(namerec->name.name)) )
- {
- if(!ismyip(from_ip))
- {
- DEBUG(3,("wins_process_name_registration_request: Attempt to register name %s. Name \
-is one of our (WINS server) names. Denying registration.\n", nmb_namestr(question) ));
- send_wins_name_registration_response(RFS_ERR, 0, p);
- return;
- }
- else
- {
- /*
- * It's one of our names and one of our IP's - update the ttl.
- */
- update_name_ttl(namerec, ttl);
- send_wins_name_registration_response(0, ttl, p);
- wins_hook("refresh", namerec, ttl);
- return;
- }
- }
-
- /*
- * If the name exists and it is a unique registration and the registering IP
- * is the same as the (single) already registered IP then just update the ttl.
- *
- * But not if the record is an active replica. IF it's a replica, it means it can be
- * the same client which has moved and not yet expired. So we don't update
- * the ttl in this case and go beyond to do a WACK and query the old client
- */
-
- if( !registering_group_name
- && (namerec != NULL)
- && (namerec->data.num_ips == 1)
- && ip_equal( namerec->data.ip[0], from_ip )
- && ip_equal(namerec->data.wins_ip, our_fake_ip) )
- {
- update_name_ttl( namerec, ttl );
- send_wins_name_registration_response( 0, ttl, p );
- wins_hook("refresh", namerec, ttl);
- return;
- }
-
- /*
- * Finally if the name exists do a query to the registering machine
- * to see if they still claim to have the name.
- */
-
- if( namerec != NULL )
- {
- long *ud[(sizeof(struct userdata_struct) + sizeof(struct packet_struct *))/sizeof(long *) + 1];
- struct userdata_struct *userdata = (struct userdata_struct *)ud;
-
- /*
- * First send a WACK to the registering machine.
- */
-
- send_wins_wack_response(60, p);
-
- /*
- * When the reply comes back we need the original packet.
- * Lock this so it won't be freed and then put it into
- * the userdata structure.
- */
-
- p->locked = True;
-
- userdata = (struct userdata_struct *)ud;
-
- userdata->copy_fn = NULL;
- userdata->free_fn = NULL;
- userdata->userdata_len = sizeof(struct packet_struct *);
- memcpy(userdata->data, (char *)&p, sizeof(struct packet_struct *) );
-
- /*
- * Use the new call to send a query directly to an IP address.
- * This sends the query directly to the IP address, and ensures
- * the recursion desired flag is not set (you were right Luke :-).
- * This function should *only* be called from the WINS server
- * code. JRA.
- */
-
- query_name_from_wins_server( *namerec->data.ip,
- question->name,
- question->name_type,
- wins_register_query_success,
- wins_register_query_fail,
- userdata );
- return;
- }
-
- /*
- * Name did not exist - add it.
- */
-
- (void)add_name_to_subnet( subrec, question->name, question->name_type,
- nb_flags, ttl, REGISTER_NAME, 1, &from_ip);
- if ((namerec = find_name_on_subnet(subrec, question, FIND_ANY_NAME))) {
- get_global_id_and_update(&namerec->data.id, True);
- update_wins_owner(namerec, our_fake_ip);
- update_wins_flag(namerec, WINS_ACTIVE);
- wins_hook("add", namerec, ttl);
- }
-
- send_wins_name_registration_response(0, ttl, p);
-}
-
-/***********************************************************************
- Deal with a mutihomed name query success to the machine that
- requested the multihomed name registration.
-
- We have a locked pointer to the original packet stashed away in the
- userdata pointer.
-************************************************************************/
-
-static void wins_multihomed_register_query_success(struct subnet_record *subrec,
- struct userdata_struct *userdata,
- struct nmb_name *question_name,
- struct in_addr ip,
- struct res_rec *answers)
-{
- struct packet_struct *orig_reg_packet;
- struct nmb_packet *nmb;
- struct name_record *namerec = NULL;
- struct in_addr from_ip;
- int ttl;
- struct in_addr our_fake_ip = *interpret_addr2("0.0.0.0");
-
- memcpy((char *)&orig_reg_packet, userdata->data, sizeof(struct packet_struct *));
-
- nmb = &orig_reg_packet->packet.nmb;
-
- putip((char *)&from_ip,&nmb->additional->rdata[2]);
- ttl = get_ttl_from_packet(nmb);
-
- /*
- * We want to just add the new IP, as we now know the requesting
- * machine claims to own it. But we can't just do that as an arbitary
- * amount of time may have taken place between the name query
- * request and this response. So we check that
- * the name still exists and is in the same state - if so
- * we just add the extra IP and update the ttl.
- */
-
- namerec = find_name_on_subnet(subrec, question_name, FIND_ANY_NAME);
-
- if( (namerec == NULL) || (namerec->data.source != REGISTER_NAME) || !WINS_STATE_ACTIVE(namerec) )
- {
- DEBUG(3,("wins_multihomed_register_query_success: name %s is not in the correct state to add \
-a subsequent IP address.\n", nmb_namestr(question_name) ));
- send_wins_name_registration_response(RFS_ERR, 0, orig_reg_packet);
-
- orig_reg_packet->locked = False;
- free_packet(orig_reg_packet);
-
- return;
- }
-
- if(!find_ip_in_name_record(namerec, from_ip))
- add_ip_to_name_record(namerec, from_ip);
-
- get_global_id_and_update(&namerec->data.id, True);
- update_wins_owner(namerec, our_fake_ip);
- update_wins_flag(namerec, WINS_ACTIVE);
- update_name_ttl(namerec, ttl);
- send_wins_name_registration_response(0, ttl, orig_reg_packet);
- wins_hook("add", namerec, ttl);
-
- orig_reg_packet->locked = False;
- free_packet(orig_reg_packet);
-}
-
-/***********************************************************************
- Deal with a name registration request query failure to a client that
- owned the name.
-
- We have a locked pointer to the original packet stashed away in the
- userdata pointer.
-************************************************************************/
-
-static void wins_multihomed_register_query_fail(struct subnet_record *subrec,
- struct response_record *rrec,
- struct nmb_name *question_name,
- int rcode)
-{
- struct userdata_struct *userdata = rrec->userdata;
- struct packet_struct *orig_reg_packet;
-
- memcpy((char *)&orig_reg_packet, userdata->data, sizeof(struct packet_struct *));
-
- DEBUG(3,("wins_multihomed_register_query_fail: Registering machine at IP %s failed to answer \
-query successfully for name %s.\n", inet_ntoa(orig_reg_packet->ip), nmb_namestr(question_name) ));
- send_wins_name_registration_response(RFS_ERR, 0, orig_reg_packet);
-
- orig_reg_packet->locked = False;
- free_packet(orig_reg_packet);
- return;
-}
-
-/***********************************************************************
- Deal with a multihomed name registration request to a WINS server.
- These cannot be group name registrations.
-***********************************************************************/
-
-void wins_process_multihomed_name_registration_request( struct subnet_record *subrec,
- struct packet_struct *p)
-{
- struct nmb_packet *nmb = &p->packet.nmb;
- struct nmb_name *question = &nmb->question.question_name;
- BOOL bcast = nmb->header.nm_flags.bcast;
- uint16 nb_flags = get_nb_flags(nmb->additional->rdata);
- int ttl = get_ttl_from_packet(nmb);
- struct name_record *namerec = NULL;
- struct in_addr from_ip;
- BOOL group = (nb_flags & NB_GROUP) ? True : False;
- struct in_addr our_fake_ip = *interpret_addr2("0.0.0.0");
-
- putip((char *)&from_ip,&nmb->additional->rdata[2]);
-
- if(bcast)
- {
- /*
- * We should only get unicast name registration packets here.
- * Anyone trying to register broadcast should not be going to a WINS
- * server. Log an error here.
- */
-
- DEBUG(0,("wins_process_multihomed_name_registration_request: broadcast name registration request \
-received for name %s from IP %s on subnet %s. Error - should not be sent to WINS server\n",
- nmb_namestr(question), inet_ntoa(from_ip), subrec->subnet_name));
- return;
- }
-
- /*
- * Only unique names should be registered multihomed.
- */
-
- if(group)
- {
- DEBUG(0,("wins_process_multihomed_name_registration_request: group name registration request \
-received for name %s from IP %s on subnet %s. Errror - group names should not be multihomed.\n",
- nmb_namestr(question), inet_ntoa(from_ip), subrec->subnet_name));
- return;
- }
-
- DEBUG(3,("wins_process_multihomed_name_registration_request: name registration for name %s \
-IP %s\n", nmb_namestr(question), inet_ntoa(from_ip) ));
-
- /*
- * Deal with policy regarding 0x1d names.
- */
-
- if(question->name_type == 0x1d)
- {
- DEBUG(3,("wins_process_multihomed_name_registration_request: Ignoring request \
-to register name %s from IP %s.", nmb_namestr(question), inet_ntoa(p->ip) ));
- send_wins_name_registration_response(0, ttl, p);
- return;
- }
-
- /*
- * See if the name already exists.
- */
-
- namerec = find_name_on_subnet(subrec, question, FIND_ANY_NAME);
-
- /*
- * if the record exists but NOT in active state,
- * consider it dead.
- */
- if ((namerec != NULL) && !WINS_STATE_ACTIVE(namerec)) {
- DEBUG(5,("wins_process_multihomed_name_registration_request: Name (%s) in WINS was not active - removing it.\n", nmb_namestr(question)));
- remove_name_from_namelist(subrec, namerec);
- namerec = NULL;
- }
-
- /*
- * Deal with the case where the name found was a dns entry.
- * Remove it as we now have a NetBIOS client registering the
- * name.
- */
-
- if( (namerec != NULL)
- && ( (namerec->data.source == DNS_NAME)
- || (namerec->data.source == DNSFAIL_NAME) ) )
- {
- DEBUG(5,("wins_process_multihomed_name_registration_request: Name (%s) in WINS was a dns lookup \
-- removing it.\n", nmb_namestr(question) ));
- remove_name_from_namelist( subrec, namerec);
- namerec = NULL;
- }
-
- /*
- * Reject if the name exists and is not a REGISTER_NAME.
- * (ie. Don't allow any static names to be overwritten.
- */
-
- if( (namerec != NULL) && (namerec->data.source != REGISTER_NAME) )
- {
- DEBUG( 3, ( "wins_process_multihomed_name_registration_request: Attempt \
-to register name %s. Name already exists in WINS with source type %d.\n",
- nmb_namestr(question), namerec->data.source ));
- send_wins_name_registration_response(RFS_ERR, 0, p);
- return;
- }
-
- /*
- * Reject if the name exists and is a GROUP name and is active.
- */
-
- if((namerec != NULL) && NAME_GROUP(namerec) && WINS_STATE_ACTIVE(namerec))
- {
- DEBUG(3,("wins_process_multihomed_name_registration_request: Attempt to register name %s. Name \
-already exists in WINS as a GROUP name.\n", nmb_namestr(question) ));
- send_wins_name_registration_response(RFS_ERR, 0, p);
- return;
- }
-
- /*
- * From here on down we know that if the name exists in the WINS db it is
- * a unique name, not a group name.
- */
-
- /*
- * If the name exists and is one of our names then check the
- * registering IP address. If it's not one of ours then automatically
- * reject without doing the query - we know we will reject it.
- */
-
- if((namerec != NULL) && (is_myname(namerec->name.name)) )
- {
- if(!ismyip(from_ip))
- {
- DEBUG(3,("wins_process_multihomed_name_registration_request: Attempt to register name %s. Name \
-is one of our (WINS server) names. Denying registration.\n", nmb_namestr(question) ));
- send_wins_name_registration_response(RFS_ERR, 0, p);
- return;
- }
- else
- {
- /*
- * It's one of our names and one of our IP's. Ensure the IP is in the record and
- * update the ttl. Update the version ID to force replication.
- */
- if(!find_ip_in_name_record(namerec, from_ip)) {
- get_global_id_and_update(&namerec->data.id, True);
- update_wins_owner(namerec, our_fake_ip);
- update_wins_flag(namerec, WINS_ACTIVE);
-
- add_ip_to_name_record(namerec, from_ip);
- wins_hook("add", namerec, ttl);
- } else {
- wins_hook("refresh", namerec, ttl);
- }
-
- update_name_ttl(namerec, ttl);
- send_wins_name_registration_response(0, ttl, p);
- return;
- }
- }
-
- /*
- * If the name exists and is active, check if the IP address is already registered
- * to that name. If so then update the ttl and reply success.
- */
-
- if((namerec != NULL) && find_ip_in_name_record(namerec, from_ip) && WINS_STATE_ACTIVE(namerec))
- {
- update_name_ttl(namerec, ttl);
- /*
- * If it's a replica, we need to become the wins owner
- * to force the replication
- */
- if (!ip_equal(namerec->data.wins_ip, our_fake_ip)) {
- get_global_id_and_update(&namerec->data.id, True);
- update_wins_owner(namerec, our_fake_ip);
- update_wins_flag(namerec, WINS_ACTIVE);
- }
-
- send_wins_name_registration_response(0, ttl, p);
- wins_hook("refresh", namerec, ttl);
- return;
- }
-
- /*
- * If the name exists do a query to the owner
- * to see if they still want the name.
- */
-
- if(namerec != NULL)
- {
- long *ud[(sizeof(struct userdata_struct) + sizeof(struct packet_struct *))/sizeof(long *) + 1];
- struct userdata_struct *userdata = (struct userdata_struct *)ud;
-
- /*
- * First send a WACK to the registering machine.
- */
-
- send_wins_wack_response(60, p);
-
- /*
- * When the reply comes back we need the original packet.
- * Lock this so it won't be freed and then put it into
- * the userdata structure.
- */
-
- p->locked = True;
-
- userdata = (struct userdata_struct *)ud;
-
- userdata->copy_fn = NULL;
- userdata->free_fn = NULL;
- userdata->userdata_len = sizeof(struct packet_struct *);
- memcpy(userdata->data, (char *)&p, sizeof(struct packet_struct *) );
-
- /*
- * Use the new call to send a query directly to an IP address.
- * This sends the query directly to the IP address, and ensures
- * the recursion desired flag is not set (you were right Luke :-).
- * This function should *only* be called from the WINS server
- * code. JRA.
- *
- * Note that this packet is sent to the current owner of the name,
- * not the person who sent the packet
- */
-
- query_name_from_wins_server( namerec->data.ip[0],
- question->name,
- question->name_type,
- wins_multihomed_register_query_success,
- wins_multihomed_register_query_fail,
- userdata );
-
- return;
- }
-
- /*
- * Name did not exist - add it.
- */
-
- (void)add_name_to_subnet( subrec, question->name, question->name_type,
- nb_flags, ttl, REGISTER_NAME, 1, &from_ip);
-
- if ((namerec = find_name_on_subnet(subrec, question, FIND_ANY_NAME))) {
- get_global_id_and_update(&namerec->data.id, True);
- update_wins_owner(namerec, our_fake_ip);
- update_wins_flag(namerec, WINS_ACTIVE);
- wins_hook("add", namerec, ttl);
- }
-
- send_wins_name_registration_response(0, ttl, p);
-}
-
-/***********************************************************************
- Deal with the special name query for *<1b>.
-***********************************************************************/
-
-static void process_wins_dmb_query_request(struct subnet_record *subrec,
- struct packet_struct *p)
-{
- struct name_record *namerec = NULL;
- char *prdata;
- int num_ips;
-
- /*
- * Go through all the ACTIVE names in the WINS db looking for those
- * ending in <1b>. Use this to calculate the number of IP
- * addresses we need to return.
- */
-
- num_ips = 0;
- for( namerec = (struct name_record *)ubi_trFirst( subrec->namelist );
- namerec;
- namerec = (struct name_record *)ubi_trNext( namerec ) )
- {
- if(WINS_STATE_ACTIVE(namerec) && namerec->name.name_type == 0x1b )
- num_ips += namerec->data.num_ips;
- }
-
- if(num_ips == 0)
- {
- /*
- * There are no 0x1b names registered. Return name query fail.
- */
- send_wins_name_query_response(NAM_ERR, p, NULL);
- return;
- }
-
- if((prdata = (char *)malloc( num_ips * 6 )) == NULL)
- {
- DEBUG(0,("process_wins_dmb_query_request: Malloc fail !.\n"));
- return;
- }
-
- /*
- * Go through all the names again in the WINS db looking for those
- * ending in <1b>. Add their IP addresses into the list we will
- * return.
- */
-
- num_ips = 0;
- for( namerec = (struct name_record *)ubi_trFirst( subrec->namelist );
- namerec;
- namerec = (struct name_record *)ubi_trNext( namerec ) )
- {
- if(WINS_STATE_ACTIVE(namerec) && namerec->name.name_type == 0x1b)
- {
- int i;
- for(i = 0; i < namerec->data.num_ips; i++)
- {
- set_nb_flags(&prdata[num_ips * 6],namerec->data.nb_flags);
- putip((char *)&prdata[(num_ips * 6) + 2], &namerec->data.ip[i]);
- num_ips++;
- }
- }
- }
-
- /*
- * Send back the reply containing the IP list.
- */
-
- reply_netbios_packet(p, /* Packet to reply to. */
- 0, /* Result code. */
- WINS_QUERY, /* nmbd type code. */
- NMB_NAME_QUERY_OPCODE, /* opcode. */
- lp_min_wins_ttl(), /* ttl. */
- prdata, /* data to send. */
- num_ips*6); /* data length. */
-
- SAFE_FREE(prdata);
-}
-
-/****************************************************************************
-Send a WINS name query response.
-**************************************************************************/
-
-void send_wins_name_query_response(int rcode, struct packet_struct *p,
- struct name_record *namerec)
-{
- char rdata[6];
- char *prdata = rdata;
- int reply_data_len = 0;
- int ttl = 0;
- int i;
-
- memset(rdata,'\0',6);
-
- if(rcode == 0)
- {
- ttl = (namerec->data.death_time != PERMANENT_TTL) ?
- namerec->data.death_time - p->timestamp : lp_max_wins_ttl();
-
- /* Copy all known ip addresses into the return data. */
- /* Optimise for the common case of one IP address so
- we don't need a malloc. */
-
- if( namerec->data.num_ips == 1 )
- prdata = rdata;
- else
- {
- if((prdata = (char *)malloc( namerec->data.num_ips * 6 )) == NULL)
- {
- DEBUG(0,("send_wins_name_query_response: malloc fail !\n"));
- return;
- }
- }
-
- for(i = 0; i < namerec->data.num_ips; i++)
- {
- set_nb_flags(&prdata[i*6],namerec->data.nb_flags);
- putip((char *)&prdata[2+(i*6)], &namerec->data.ip[i]);
- }
-
- sort_query_replies(prdata, i, p->ip);
-
- reply_data_len = namerec->data.num_ips * 6;
- }
-
- reply_netbios_packet(p, /* Packet to reply to. */
- rcode, /* Result code. */
- WINS_QUERY, /* nmbd type code. */
- NMB_NAME_QUERY_OPCODE, /* opcode. */
- ttl, /* ttl. */
- prdata, /* data to send. */
- reply_data_len); /* data length. */
-
- if(prdata != rdata)
- SAFE_FREE(prdata);
-}
-
-/***********************************************************************
- Deal with a name query.
-***********************************************************************/
-
-void wins_process_name_query_request(struct subnet_record *subrec,
- struct packet_struct *p)
-{
- struct nmb_packet *nmb = &p->packet.nmb;
- struct nmb_name *question = &nmb->question.question_name;
- struct name_record *namerec = NULL;
-
- DEBUG(3,("wins_process_name_query: name query for name %s from IP %s\n",
- nmb_namestr(question), inet_ntoa(p->ip) ));
-
- /*
- * Special name code. If the queried name is *<1b> then search
- * the entire WINS database and return a list of all the IP addresses
- * registered to any <1b> name. This is to allow domain master browsers
- * to discover other domains that may not have a presence on their subnet.
- */
-
- if(strequal( question->name, "*") && (question->name_type == 0x1b))
- {
- process_wins_dmb_query_request( subrec, p);
- return;
- }
-
- namerec = find_name_on_subnet(subrec, question, FIND_ANY_NAME);
-
- if(namerec != NULL)
- {
- /*
- * If the name is not anymore in active state then reply not found.
- * it's fair even if we keep it in the cache for days.
- */
- if (!WINS_STATE_ACTIVE(namerec))
- {
- DEBUG(3,("wins_process_name_query: name query for name %s - name expired. Returning fail.\n",
- nmb_namestr(question) ));
- send_wins_name_query_response(NAM_ERR, p, namerec);
- return;
- }
- /*
- * If it's a DNSFAIL_NAME then reply name not found.
- */
-
- if( namerec->data.source == DNSFAIL_NAME )
- {
- DEBUG(3,("wins_process_name_query: name query for name %s returning DNS fail.\n",
- nmb_namestr(question) ));
- send_wins_name_query_response(NAM_ERR, p, namerec);
- return;
- }
-
- /*
- * If the name has expired then reply name not found.
- */
-
- if( (namerec->data.death_time != PERMANENT_TTL)
- && (namerec->data.death_time < p->timestamp) )
- {
- DEBUG(3,("wins_process_name_query: name query for name %s - name expired. Returning fail.\n",
- nmb_namestr(question) ));
- send_wins_name_query_response(NAM_ERR, p, namerec);
- return;
- }
-
- DEBUG(3,("wins_process_name_query: name query for name %s returning first IP %s.\n",
- nmb_namestr(question), inet_ntoa(namerec->data.ip[0]) ));
-
- send_wins_name_query_response(0, p, namerec);
- return;
- }
-
- /*
- * Name not found in WINS - try a dns query if it's a 0x20 name.
- */
-
- if(lp_dns_proxy() &&
- ((question->name_type == 0x20) || question->name_type == 0))
- {
-
- DEBUG(3,("wins_process_name_query: name query for name %s not found - doing dns lookup.\n",
- nmb_namestr(question) ));
-
- queue_dns_query(p, question, &namerec);
- return;
- }
-
- /*
- * Name not found - return error.
- */
-
- send_wins_name_query_response(NAM_ERR, p, NULL);
-}
-
-/****************************************************************************
-Send a WINS name release response.
-**************************************************************************/
-
-static void send_wins_name_release_response(int rcode, struct packet_struct *p)
-{
- struct nmb_packet *nmb = &p->packet.nmb;
- char rdata[6];
-
- memcpy(&rdata[0], &nmb->additional->rdata[0], 6);
-
- reply_netbios_packet(p, /* Packet to reply to. */
- rcode, /* Result code. */
- NMB_REL, /* nmbd type code. */
- NMB_NAME_RELEASE_OPCODE, /* opcode. */
- 0, /* ttl. */
- rdata, /* data to send. */
- 6); /* data length. */
-}
-
-/***********************************************************************
- Deal with a name release.
-***********************************************************************/
-
-void wins_process_name_release_request(struct subnet_record *subrec,
- struct packet_struct *p)
-{
- struct nmb_packet *nmb = &p->packet.nmb;
- struct nmb_name *question = &nmb->question.question_name;
- BOOL bcast = nmb->header.nm_flags.bcast;
- uint16 nb_flags = get_nb_flags(nmb->additional->rdata);
- struct name_record *namerec = NULL;
- struct in_addr from_ip;
- BOOL releasing_group_name = (nb_flags & NB_GROUP) ? True : False;;
-
- putip((char *)&from_ip,&nmb->additional->rdata[2]);
-
- if(bcast)
- {
- /*
- * We should only get unicast name registration packets here.
- * Anyone trying to register broadcast should not be going to a WINS
- * server. Log an error here.
- */
-
- DEBUG(0,("wins_process_name_release_request: broadcast name registration request \
-received for name %s from IP %s on subnet %s. Error - should not be sent to WINS server\n",
- nmb_namestr(question), inet_ntoa(from_ip), subrec->subnet_name));
- return;
- }
-
- DEBUG(3,("wins_process_name_release_request: %s name release for name %s \
-IP %s\n", releasing_group_name ? "Group" : "Unique", nmb_namestr(question), inet_ntoa(from_ip) ));
-
- /*
- * Deal with policy regarding 0x1d names.
- */
-
- if(!releasing_group_name && (question->name_type == 0x1d))
- {
- DEBUG(3,("wins_process_name_release_request: Ignoring request \
-to release name %s from IP %s.", nmb_namestr(question), inet_ntoa(p->ip) ));
- send_wins_name_release_response(0, p);
- return;
- }
-
- /*
- * See if the name already exists.
- */
-
- namerec = find_name_on_subnet(subrec, question, FIND_ANY_NAME);
-
- if( (namerec == NULL)
- || ((namerec != NULL) && (namerec->data.source != REGISTER_NAME)) )
- {
- send_wins_name_release_response(NAM_ERR, p);
- return;
- }
-
- /*
- * Check that the sending machine has permission to release this name.
- * If it's a group name not ending in 0x1c then just say yes and let
- * the group time out.
- */
-
- if(releasing_group_name && (question->name_type != 0x1c))
- {
- send_wins_name_release_response(0, p);
- return;
- }
-
- /*
- * Check that the releasing node is on the list of IP addresses
- * for this name. Disallow the release if not.
- */
-
- if(!find_ip_in_name_record(namerec, from_ip))
- {
- DEBUG(3,("wins_process_name_release_request: Refusing request to \
-release name %s as IP %s is not one of the known IP's for this name.\n",
- nmb_namestr(question), inet_ntoa(from_ip) ));
- send_wins_name_release_response(NAM_ERR, p);
- return;
- }
-
- /*
- * Check if the record is active. IF it's already released
- * or tombstoned, refuse the release.
- */
- if (!WINS_STATE_ACTIVE(namerec)) {
- DEBUG(3,("wins_process_name_release_request: Refusing request to \
-release name %s as this record is not anymore active.\n",
- nmb_namestr(question) ));
- send_wins_name_release_response(NAM_ERR, p);
- return;
- }
-
- /*
- * Check if the record is a 0x1c group
- * and has more then one ip
- * remove only this address.
- */
-
- if(releasing_group_name &&
- (question->name_type == 0x1c) &&
- (namerec->data.num_ips > 1)) {
- remove_ip_from_name_record(namerec, from_ip);
- DEBUG(3,("wins_process_name_release_request: Remove IP %s from NAME: %s\n",
- inet_ntoa(from_ip),nmb_namestr(question)));
- send_wins_name_release_response(0, p);
- return;
- }
-
- /*
- * Send a release response.
- * Flag the name as released and update the ttl
- */
-
- send_wins_name_release_response(0, p);
-
- namerec->data.wins_flags |= WINS_RELEASED;
- update_name_ttl(namerec, EXTINCTION_INTERVAL);
-
- wins_hook("delete", namerec, 0);
-}
-
-/*******************************************************************
- WINS time dependent processing.
-******************************************************************/
-
-void initiate_wins_processing(time_t t)
-{
- static time_t lasttime = 0;
- struct name_record *namerec;
- struct name_record *next_namerec;
- struct in_addr our_fake_ip = *interpret_addr2("0.0.0.0");
-
- if (!lasttime)
- lasttime = t;
- if (t - lasttime < 20)
- return;
-
- lasttime = t;
-
- if(!lp_we_are_a_wins_server())
- return;
-
- for( namerec = (struct name_record *)ubi_trFirst( wins_server_subnet->namelist );
- namerec;
- namerec = next_namerec ) {
- next_namerec = (struct name_record *)ubi_trNext( namerec );
-
- if( (namerec->data.death_time != PERMANENT_TTL)
- && (namerec->data.death_time < t) ) {
-
- if( namerec->data.source == SELF_NAME ) {
- DEBUG( 3, ( "expire_names_on_subnet: Subnet %s not expiring SELF name %s\n",
- wins_server_subnet->subnet_name, nmb_namestr(&namerec->name) ) );
- namerec->data.death_time += 300;
- namerec->subnet->namelist_changed = True;
- continue;
- }
-
- /* handle records, samba is the wins owner */
- if (ip_equal(namerec->data.wins_ip, our_fake_ip)) {
- switch (namerec->data.wins_flags | WINS_STATE_MASK) {
- case WINS_ACTIVE:
- namerec->data.wins_flags&=~WINS_STATE_MASK;
- namerec->data.wins_flags|=WINS_RELEASED;
- namerec->data.death_time = t + EXTINCTION_INTERVAL;
- DEBUG(3,("initiate_wins_processing: expiring %s\n", nmb_namestr(&namerec->name)));
- break;
- case WINS_RELEASED:
- namerec->data.wins_flags&=~WINS_STATE_MASK;
- namerec->data.wins_flags|=WINS_TOMBSTONED;
- namerec->data.death_time = t + EXTINCTION_TIMEOUT;
- get_global_id_and_update(&namerec->data.id, True);
- DEBUG(3,("initiate_wins_processing: tombstoning %s\n", nmb_namestr(&namerec->name)));
- break;
- case WINS_TOMBSTONED:
- DEBUG(3,("initiate_wins_processing: deleting %s\n", nmb_namestr(&namerec->name)));
- remove_name_from_namelist( wins_server_subnet, namerec );
- break;
- }
- } else {
- switch (namerec->data.wins_flags | WINS_STATE_MASK) {
- case WINS_ACTIVE:
- /* that's not as MS says it should be */
- namerec->data.wins_flags&=~WINS_STATE_MASK;
- namerec->data.wins_flags|=WINS_TOMBSTONED;
- namerec->data.death_time = t + EXTINCTION_TIMEOUT;
- DEBUG(3,("initiate_wins_processing: tombstoning %s\n", nmb_namestr(&namerec->name)));
- case WINS_TOMBSTONED:
- DEBUG(3,("initiate_wins_processing: deleting %s\n", nmb_namestr(&namerec->name)));
- remove_name_from_namelist( wins_server_subnet, namerec );
- break;
- case WINS_RELEASED:
- DEBUG(0,("initiate_wins_processing: %s is in released state and\
-we are not the wins owner !\n", nmb_namestr(&namerec->name)));
- break;
- }
- }
-
- }
- }
-
- if(wins_server_subnet->namelist_changed)
- wins_write_database(True);
-
- wins_server_subnet->namelist_changed = False;
-}
-
-/*******************************************************************
- Write out the current WINS database.
-******************************************************************/
-void wins_write_database(BOOL background)
-{
- struct name_record *namerec;
- pstring fname, fnamenew;
- TDB_CONTEXT *tdb;
- TDB_DATA kbuf, dbuf;
- pstring key, buf;
- int len;
- int num_record=0;
- SMB_BIG_UINT id;
-
- if(!lp_we_are_a_wins_server())
- return;
-
- /* we will do the writing in a child process to ensure that the parent
- doesn't block while this is done */
- if (background) {
- CatchChild();
- if (sys_fork()) {
- return;
- }
- }
-
- slprintf(fname,sizeof(fname)-1,"%s/%s", lp_lockdir(), WINS_LIST);
- all_string_sub(fname,"//", "/", 0);
- slprintf(fnamenew,sizeof(fnamenew)-1,"%s.%u", fname, (unsigned int)sys_getpid());
-
- tdb = tdb_open_log(fnamenew, 0, TDB_DEFAULT, O_RDWR|O_CREAT|O_TRUNC, 0644);
- if (!tdb) {
- DEBUG(0,("wins_write_database: Can't open %s. Error was %s\n", fnamenew, strerror(errno)));
- if (background)
- _exit(0);
- return;
- }
-
- DEBUG(3,("wins_write_database: Dump of WINS name list.\n"));
-
- tdb_store_int32(tdb, INFO_VERSION, WINS_VERSION);
-
- for (namerec = (struct name_record *)ubi_trFirst( wins_server_subnet->namelist );
- namerec;
- namerec = (struct name_record *)ubi_trNext( namerec ) ) {
-
- int i;
- struct tm *tm;
-
- DEBUGADD(3,("%-19s ", nmb_namestr(&namerec->name) ));
-
- if( namerec->data.death_time != PERMANENT_TTL ) {
- char *ts, *nl;
-
- tm = localtime(&namerec->data.death_time);
- ts = asctime(tm);
- nl = strrchr_m( ts, '\n' );
- if( NULL != nl )
- *nl = '\0';
-
- DEBUGADD(3,("TTL = %s ", ts ));
- } else
- DEBUGADD(3,("TTL = PERMANENT "));
-
- for (i = 0; i < namerec->data.num_ips; i++)
- DEBUGADD(0,("%15s ", inet_ntoa(namerec->data.ip[i]) ));
-
- DEBUGADD(3,("0x%2x 0x%2x %15s\n", namerec->data.nb_flags, namerec->data.wins_flags, inet_ntoa(namerec->data.wins_ip)));
-
- if( namerec->data.source == REGISTER_NAME ) {
-
- /* store the type in the key to make the name unique */
- slprintf(key, sizeof(key), "%s%s#%02x", ENTRY_PREFIX, namerec->name.name, namerec->name.name_type);
-
- len = tdb_pack(buf, sizeof(buf), "dddfddd",
- (int)namerec->data.nb_flags,
- (int)(namerec->data.id>>32),
- (int)(namerec->data.id&0xffffffff),
- inet_ntoa(namerec->data.wins_ip),
- (int)namerec->data.death_time,
- namerec->data.num_ips,
- namerec->data.wins_flags);
-
- for (i = 0; i < namerec->data.num_ips; i++)
- len += tdb_pack(buf+len, sizeof(buf)-len, "f", inet_ntoa(namerec->data.ip[i]));
-
- kbuf.dsize = strlen(key)+1;
- kbuf.dptr = key;
- dbuf.dsize = len;
- dbuf.dptr = buf;
- if (tdb_store(tdb, kbuf, dbuf, TDB_INSERT) != 0) return;
-
- num_record++;
- }
- }
-
- /* store the number of records */
- tdb_store_int32(tdb, INFO_COUNT, num_record);
-
- /* get and store the last used ID */
- get_global_id_and_update(&id, False);
- tdb_store_int32(tdb, INFO_ID_HIGH, id>>32);
- tdb_store_int32(tdb, INFO_ID_LOW, id&0xffffffff);
-
- tdb_close(tdb);
-
- chmod(fnamenew,0644);
- unlink(fname);
- rename(fnamenew,fname);
-
- if (background)
- _exit(0);
-}
-
-/****************************************************************************
-process a internal Samba message receiving a wins record
-***************************************************************************/
-void nmbd_wins_new_entry(int msg_type, pid_t src, void *buf, size_t len)
-{
- WINS_RECORD *record;
- struct name_record *namerec = NULL;
- struct name_record *new_namerec = NULL;
- struct nmb_name question;
- BOOL overwrite=False;
- struct in_addr our_fake_ip = *interpret_addr2("0.0.0.0");
- int i;
-
- if (buf==NULL)
- return;
-
- record=(WINS_RECORD *)buf;
-
- ZERO_STRUCT(question);
- memcpy(question.name, record->name, 16);
- question.name_type=record->type;
-
- namerec = find_name_on_subnet(wins_server_subnet, &question, FIND_ANY_NAME);
-
- /* record doesn't exist, add it */
- if (namerec == NULL) {
- DEBUG(3,("nmbd_wins_new_entry: adding new replicated record: %s<%02x> for wins server: %s\n",
- record->name, record->type, inet_ntoa(record->wins_ip)));
-
- new_namerec=add_name_to_subnet( wins_server_subnet, record->name, record->type, record->nb_flags,
- EXTINCTION_INTERVAL, REGISTER_NAME, record->num_ips, record->ip);
- if (new_namerec!=NULL) {
- update_wins_owner(new_namerec, record->wins_ip);
- update_wins_flag(new_namerec, record->wins_flags);
- new_namerec->data.id=record->id;
-
- wins_server_subnet->namelist_changed = True;
- }
- }
-
- /* check if we have a conflict */
- if (namerec != NULL) {
- /* both records are UNIQUE */
- if (namerec->data.wins_flags&WINS_UNIQUE && record->wins_flags&WINS_UNIQUE) {
-
- /* the database record is a replica */
- if (!ip_equal(namerec->data.wins_ip, our_fake_ip)) {
- if (namerec->data.wins_flags&WINS_ACTIVE && record->wins_flags&WINS_TOMBSTONED) {
- if (ip_equal(namerec->data.wins_ip, record->wins_ip))
- overwrite=True;
- } else
- overwrite=True;
- } else {
- /* we are the wins owner of the database record */
- /* the 2 records have the same IP address */
- if (ip_equal(namerec->data.ip[0], record->ip[0])) {
- if (namerec->data.wins_flags&WINS_ACTIVE && record->wins_flags&WINS_TOMBSTONED)
- get_global_id_and_update(&namerec->data.id, True);
- else
- overwrite=True;
-
- } else {
- /* the 2 records have different IP address */
- if (namerec->data.wins_flags&WINS_ACTIVE) {
- if (record->wins_flags&WINS_TOMBSTONED)
- get_global_id_and_update(&namerec->data.id, True);
- if (record->wins_flags&WINS_ACTIVE)
- /* send conflict challenge to the replica node */
- ;
- } else
- overwrite=True;
- }
-
- }
- }
-
- /* the replica is a standard group */
- if (record->wins_flags&WINS_NGROUP || record->wins_flags&WINS_SGROUP) {
- /* if the database record is unique and active force a name release */
- if (namerec->data.wins_flags&WINS_UNIQUE)
- /* send a release name to the unique node */
- ;
- overwrite=True;
-
- }
-
- /* the replica is a special group */
- if (record->wins_flags&WINS_SGROUP && namerec->data.wins_flags&WINS_SGROUP) {
- if (namerec->data.wins_flags&WINS_ACTIVE) {
- for (i=0; i<record->num_ips; i++)
- if(!find_ip_in_name_record(namerec, record->ip[i]))
- add_ip_to_name_record(namerec, record->ip[i]);
- }
- else
- overwrite=True;
- }
-
- /* the replica is a multihomed host */
-
- /* I'm giving up on multi homed. Too much complex to understand */
-
- if (record->wins_flags&WINS_MHOMED) {
- if (! (namerec->data.wins_flags&WINS_ACTIVE)) {
- if ( !(namerec->data.wins_flags&WINS_RELEASED) && !(namerec->data.wins_flags&WINS_NGROUP))
- overwrite=True;
- }
- else {
- if (ip_equal(record->wins_ip, namerec->data.wins_ip))
- overwrite=True;
-
- if (ip_equal(namerec->data.wins_ip, our_fake_ip))
- if (namerec->data.wins_flags&WINS_UNIQUE)
- get_global_id_and_update(&namerec->data.id, True);
-
- }
-
- if (record->wins_flags&WINS_ACTIVE && namerec->data.wins_flags&WINS_ACTIVE)
- if (namerec->data.wins_flags&WINS_UNIQUE ||
- namerec->data.wins_flags&WINS_MHOMED)
- if (ip_equal(record->wins_ip, namerec->data.wins_ip))
- overwrite=True;
-
- }
-
- if (overwrite == False)
- DEBUG(3, ("nmbd_wins_new_entry: conflict in adding record: %s<%02x> from wins server: %s\n",
- record->name, record->type, inet_ntoa(record->wins_ip)));
- else {
- DEBUG(3, ("nmbd_wins_new_entry: replacing record: %s<%02x> from wins server: %s\n",
- record->name, record->type, inet_ntoa(record->wins_ip)));
-
- /* remove the old record and add a new one */
- remove_name_from_namelist( wins_server_subnet, namerec );
- new_namerec=add_name_to_subnet( wins_server_subnet, record->name, record->type, record->nb_flags,
- EXTINCTION_INTERVAL, REGISTER_NAME, record->num_ips, record->ip);
- if (new_namerec!=NULL) {
- update_wins_owner(new_namerec, record->wins_ip);
- update_wins_flag(new_namerec, record->wins_flags);
- new_namerec->data.id=record->id;
-
- wins_server_subnet->namelist_changed = True;
- }
-
- wins_server_subnet->namelist_changed = True;
- }
-
- }
-}
-
-
-
-
-
-
-
-