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|
/*
Unix SMB/CIFS implementation.
process incoming packets - main loop
Copyright (C) Jean Fran�ois Micouleau 1998-2002.
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"
#include "wins_repl.h"
extern fd_set *listen_set;
extern int listen_number;
extern int *sock_array;
WINS_OWNER global_wins_table[64][64];
int partner_count;
TALLOC_CTX *mem_ctx;
#define WINS_LIST "wins.tdb"
#define INFO_VERSION "INFO/version"
#define INFO_COUNT "INFO/num_entries"
#define INFO_ID_HIGH "INFO/id_high"
#define INFO_ID_LOW "INFO/id_low"
#define ENTRY_PREFIX "ENTRY/"
/*******************************************************************
fill the header of a reply.
********************************************************************/
static void fill_header(GENERIC_PACKET *g, int opcode, int ctx, int mess)
{
if (g==NULL)
return;
g->header.opcode=opcode;
g->header.assoc_ctx=ctx;
g->header.mess_type=mess;
}
/*******************************************************************
dump the global table, that's a debug code.
********************************************************************/
static void dump_global_table(void)
{
int i,j;
for (i=0;i<partner_count;i++) {
DEBUG(10,("\n%d ", i));
for (j=0; global_wins_table[i][j].address.s_addr!=0; j++)
DEBUG(10,("%s:%d \t", inet_ntoa(global_wins_table[i][j].address),
(int)global_wins_table[i][j].max_version));
}
DEBUG(10,("\n"));
}
/*******************************************************************
start association
********************************************************************/
static void start_assoc_process(GENERIC_PACKET *q, GENERIC_PACKET *r)
{
/*
* add this request to our current wins partners list
* this list is used to know with who we are in contact
*
*/
r->sa_rp.assoc_ctx=time(NULL);
fill_header(r, OPCODE_NON_NBT, q->sa_rq.assoc_ctx, MESSAGE_TYPE_START_ASSOC_REPLY);
/* reply we are a NT4 server */
/* w2K is min=2, maj=5 */
r->sa_rp.min_ver=1;
r->sa_rp.maj_ver=1;
add_partner(r->sa_rp.assoc_ctx, q->sa_rq.assoc_ctx, False, False);
}
/*******************************************************************
start association reply
********************************************************************/
static void start_assoc_reply(GENERIC_PACKET *q, GENERIC_PACKET *r)
{
int i;
/* check if we have already registered this client */
if (!check_partner(q->header.assoc_ctx)) {
DEBUG(0,("start_assoc_reply: unknown client\n"));
stop_packet(q, r, STOP_REASON_USER_REASON);
return;
}
if (!update_server_partner(q->header.assoc_ctx, q->sa_rp.assoc_ctx)) {
DEBUG(0,("start_assoc_reply: can't update server ctx\n"));
stop_packet(q, r, STOP_REASON_USER_REASON);
return;
}
/* if pull, request map table */
if (check_pull_partner(q->header.assoc_ctx)) {
fill_header(r, OPCODE_NON_NBT, get_server_assoc(q->header.assoc_ctx), MESSAGE_TYPE_REPLICATE);
r->rep.msg_type=MESSAGE_REP_ADD_VERSION_REQUEST;
DEBUG(5,("start_assoc_reply: requesting map table\n"));
return;
}
/* if push, send our table */
if (check_push_partner(q->header.assoc_ctx)) {
fill_header(r, OPCODE_NON_NBT, get_server_assoc(q->header.assoc_ctx), MESSAGE_TYPE_REPLICATE);
r->rep.msg_type=MESSAGE_REP_UPDATE_NOTIFY_REQUEST;
r->rep.un_rq.partner_count=partner_count;
r->rep.un_rq.wins_owner=(WINS_OWNER *)talloc(mem_ctx, partner_count*sizeof(WINS_OWNER));
if (r->rep.un_rq.wins_owner==NULL) {
DEBUG(0,("start_assoc_reply: can't alloc memory\n"));
stop_packet(q, r, STOP_REASON_USER_REASON);
return;
}
for (i=0; i<partner_count; i++)
r->rep.un_rq.wins_owner[i]=global_wins_table[0][i];
DEBUG(5,("start_assoc_reply: sending update table\n"));
return;
}
/* neither push/pull, stop */
/* we should not come here */
DEBUG(0,("we have a partner which is neither push nor pull !\n"));
stop_packet(q, r, STOP_REASON_USER_REASON);
}
/****************************************************************************
initialise and fill the in-memory partner table.
****************************************************************************/
int init_wins_partner_table(void)
{
int i=1,j=0,k;
char **partner = str_list_make(lp_wins_partners(), NULL);
if (partner==NULL) {
DEBUG(0,("wrepld: no partner list in smb.conf, exiting\n"));
exit_server("normal exit");
return(0);
}
DEBUG(4, ("init_wins_partner_table: partners: %s\n", lp_wins_partners()));
global_wins_table[0][0].address=*iface_n_ip(0);
global_wins_table[0][0].max_version=0;
global_wins_table[0][0].min_version=0;
global_wins_table[0][0].type=0;
while (partner[j]!=NULL) {
DEBUG(3,("init_wins_partner_table, adding partner: %s\n", partner[j]));
global_wins_table[0][i].address=*interpret_addr2(partner[j]);
global_wins_table[0][i].max_version=0;
global_wins_table[0][i].min_version=0;
global_wins_table[0][i].type=0;
global_wins_table[0][i].last_pull=0;
global_wins_table[0][i].last_push=0;
i++;
j++;
}
for (k=1; k<i;k++)
for (j=0; j<i; j++)
global_wins_table[k][j]=global_wins_table[0][j];
str_list_free (&partner);
return i;
}
/****************************************************************************
read the last ID from the wins tdb file.
****************************************************************************/
static void get_our_last_id(WINS_OWNER *wins_owner)
{
TDB_CONTEXT *tdb;
tdb = tdb_open_log(lock_path(WINS_LIST), 0, TDB_DEFAULT, O_RDONLY, 0600);
if (!tdb) {
DEBUG(2,("get_our_last_id: Can't open wins database file %s. Error was %s\n", WINS_LIST, strerror(errno) ));
return;
}
wins_owner->max_version=((SMB_BIG_UINT)tdb_fetch_int32(tdb, INFO_ID_HIGH))<<32 |
(SMB_BIG_UINT)tdb_fetch_int32(tdb, INFO_ID_LOW);
tdb_close(tdb);
}
/****************************************************************************
send the list of wins server we know.
****************************************************************************/
static void send_version_number_map_table(GENERIC_PACKET *q, GENERIC_PACKET *r)
{
int i;
int s_ctx=get_server_assoc(q->header.assoc_ctx);
if (s_ctx==0) {
DEBUG(5, ("send_version_number_map_table: request for a partner not in our table\n"));
stop_packet(q, r, STOP_REASON_USER_REASON);
return;
}
/*
* return an array of wins servers, we are partner with.
* each entry contains the IP address and the version info
* version: ID of the last entry we've got
*/
/* the first wins server must be self */
/*
* get our last ID from the wins database
* it can have been updated since last read
* as nmbd got registration/release.
*/
get_our_last_id(&global_wins_table[0][0]);
r->rep.avmt_rep.wins_owner=(WINS_OWNER *)talloc(mem_ctx, partner_count*sizeof(WINS_OWNER));
if (r->rep.avmt_rep.wins_owner==NULL) {
stop_packet(q, r, STOP_REASON_USER_REASON);
return;
}
DEBUG(5,("send_version_number_map_table: partner_count: %d\n", partner_count));
for (i=0; i<partner_count; i++) {
DEBUG(5,("send_version_number_map_table, partner: %d -> %s, \n", i, inet_ntoa(global_wins_table[0][i].address)));
r->rep.avmt_rep.wins_owner[i]=global_wins_table[0][i];
}
r->rep.msg_type=1;
r->rep.avmt_rep.partner_count=partner_count;
r->rep.avmt_rep.initiating_wins_server.s_addr=0; /* blatant lie, NT4/w2K do the same ! */
fill_header(r, OPCODE_NON_NBT, s_ctx, MESSAGE_TYPE_REPLICATE);
}
/****************************************************************************
for a given partner, ask it to send entries we don't have.
****************************************************************************/
static BOOL check_partners_and_send_entries(GENERIC_PACKET *q, GENERIC_PACKET *r, int partner)
{
int server;
int other;
SMB_BIG_UINT temp;
SMB_BIG_UINT current;
/*
* we check if our partner has more records than us.
* we need to check more than our direct partners as
* we can have this case:
* us: A, partners: B,C, indirect partner: D
* A<->B, A<->C, B<->D, C<->D
*
* So if we're talking to B, we need to check if between
* B and C, which one have more records about D.
* and also check if we don't already have the records.
*/
/* check all servers even indirect */
for (server=1; global_wins_table[0][server].address.s_addr!=0; server++) {
current = global_wins_table[partner][server].max_version;
temp=0;
for (other=1; other<partner_count; other++) {
/* skip the partner itself */
if (other==partner)
continue;
if (global_wins_table[other][server].max_version > temp)
temp=global_wins_table[other][server].max_version;
}
if (current >= temp && current > global_wins_table[0][server].max_version) {
/*
* it has more records than every body else and more than us,
* ask it the difference between what we have and what it has
*/
fill_header(r, OPCODE_NON_NBT, get_server_assoc(q->header.assoc_ctx), MESSAGE_TYPE_REPLICATE);
r->rep.msg_type=MESSAGE_REP_SEND_ENTRIES_REQUEST;
r->rep.se_rq.wins_owner.address=global_wins_table[partner][server].address;
r->rep.se_rq.wins_owner.max_version=global_wins_table[partner][server].max_version;
r->rep.se_rq.wins_owner.min_version=global_wins_table[0][server].max_version;
r->rep.se_rq.wins_owner.type=0;
write_server_assoc_table(q->header.assoc_ctx, global_wins_table[0][partner].address, global_wins_table[partner][server].address);
/*
* and we update our version for this server
* as we can't use the IDs returned in the send_entries function
* the max ID can be larger than the largest ID returned
*/
global_wins_table[0][server].max_version=global_wins_table[partner][server].max_version;
return True;
}
}
return False;
}
/****************************************************************************
receive the list of wins server we know.
****************************************************************************/
static void receive_version_number_map_table(GENERIC_PACKET *q, GENERIC_PACKET *r)
{
fstring peer;
struct in_addr addr;
int i,j,k,l;
int s_ctx=get_server_assoc(q->header.assoc_ctx);
if (s_ctx==0) {
DEBUG(5, ("receive_version_number_map_table: request for a partner not in our table\n"));
stop_packet(q, r, STOP_REASON_USER_REASON);
return;
}
fstrcpy(peer,get_socket_addr(q->fd));
addr=*interpret_addr2(peer);
get_our_last_id(&global_wins_table[0][0]);
DEBUG(5,("receive_version_number_map_table: received a map of %d server from: %s\n",
q->rep.avmt_rep.partner_count ,inet_ntoa(q->rep.avmt_rep.initiating_wins_server)));
DEBUG(5,("real peer is: %s\n", peer));
for (i=0; global_wins_table[0][i].address.s_addr!=addr.s_addr && i<partner_count;i++)
;
if (i==partner_count) {
DEBUG(5,("receive_version_number_map_table: unknown partner: %s\n", peer));
stop_packet(q, r, STOP_REASON_USER_REASON);
return;
}
for (j=0; j<q->rep.avmt_rep.partner_count;j++) {
/*
* search if we already have this entry or if it's a new one
* it can be a new one in case of propagation
*/
for (k=0; global_wins_table[0][k].address.s_addr!=0 &&
global_wins_table[0][k].address.s_addr!=q->rep.avmt_rep.wins_owner[j].address.s_addr; k++);
global_wins_table[i][k].address.s_addr=q->rep.avmt_rep.wins_owner[j].address.s_addr;
global_wins_table[i][k].max_version=q->rep.avmt_rep.wins_owner[j].max_version;
global_wins_table[i][k].min_version=q->rep.avmt_rep.wins_owner[j].min_version;
global_wins_table[i][k].type=q->rep.avmt_rep.wins_owner[j].type;
/*
* in case it's a new one, rewrite the address for all the partner
* to reserve the slot.
*/
for(l=0; l<partner_count; l++)
global_wins_table[l][k].address.s_addr=q->rep.avmt_rep.wins_owner[j].address.s_addr;
}
dump_global_table();
/*
* if this server have newer records than what we have
* for several wins servers, we need to ask it.
* Alas a send entry request is only on one server.
* So in the send entry reply, we'll ask for the next server if required.
*/
if (check_partners_and_send_entries(q, r, i))
return;
/* it doesn't have more entries than us */
stop_packet(q, r, STOP_REASON_USER_REASON);
}
/****************************************************************************
add an entry to the wins list we'll send.
****************************************************************************/
static BOOL add_record_to_winsname(WINS_NAME **wins_name, int *max_names, char *name, int type, int wins_flags, int id, struct in_addr *ip_list, int num_ips)
{
WINS_NAME *temp_list;
int i;
int current=*max_names;
temp_list=talloc_realloc(mem_ctx, *wins_name, (current+1)*sizeof(WINS_NAME));
if (temp_list==NULL)
return False;
temp_list[current].name_len=0x11;
safe_strcpy(temp_list[current].name, name, 15);
temp_list[current].type=type;
temp_list[current].empty=0;
temp_list[current].name_flag=wins_flags;
if ( (wins_flags&0x03) == 1 || (wins_flags&0x03)==2)
temp_list[current].group_flag=0x01000000;
else
temp_list[current].group_flag=0x00000000;
temp_list[current].id=id;
temp_list[current].owner.s_addr=ip_list[0].s_addr;
if (temp_list[current].name_flag & 2) {
temp_list[current].num_ip=num_ips;
temp_list[current].others=(struct in_addr *)talloc(mem_ctx, sizeof(struct in_addr)*num_ips);
if (temp_list[current].others==NULL)
return False;
for (i=0; i<num_ips; i++)
temp_list[current].others[i].s_addr=ip_list[i].s_addr;
} else
temp_list[current].num_ip=1;
temp_list[current].foo=0xffffffff;
*wins_name=temp_list;
return True;
}
/****************************************************************************
send the list of name we have.
****************************************************************************/
static void send_entry_request(GENERIC_PACKET *q, GENERIC_PACKET *r)
{
int max_names=0;
int i;
time_t time_now = time(NULL);
WINS_OWNER *wins_owner;
TDB_CONTEXT *tdb;
TDB_DATA kbuf, dbuf, newkey;
int s_ctx=get_server_assoc(q->header.assoc_ctx);
int num_interfaces = iface_count();
if (s_ctx==0) {
DEBUG(1, ("send_entry_request: request for a partner not in our table\n"));
stop_packet(q, r, STOP_REASON_USER_REASON);
return;
}
wins_owner=&q->rep.se_rq.wins_owner;
r->rep.se_rp.wins_name=NULL;
DEBUG(3,("send_entry_request: we have been asked to send the list of wins records\n"));
DEBUGADD(3,("owned by: %s and between min: %d and max: %d\n", inet_ntoa(wins_owner->address),
(int)wins_owner->min_version, (int)wins_owner->max_version));
/*
* if we are asked to send records owned by us
* we overwrite the wins ip with 0.0.0.0
* to make it easy in case of multihomed
*/
for (i=0; i<num_interfaces; i++)
if (ip_equal(wins_owner->address, *iface_n_ip(i))) {
wins_owner->address=*interpret_addr2("0.0.0.0");
break;
}
tdb = tdb_open_log(lock_path(WINS_LIST), 0, TDB_DEFAULT, O_RDONLY, 0600);
if (!tdb) {
DEBUG(2,("send_entry_request: Can't open wins database file %s. Error was %s\n", WINS_LIST, strerror(errno) ));
return;
}
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 low, high;
SMB_BIG_UINT version;
struct in_addr wins_ip;
struct in_addr *ip_list;
int wins_flags;
int len;
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);
/* Allocate the space for the ip_list. */
if((ip_list = (struct in_addr *)talloc(mem_ctx, num_ips * sizeof(struct in_addr))) == NULL) {
SAFE_FREE(dbuf.dptr);
DEBUG(0,("initialise_wins: talloc fail !\n"));
return;
}
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);
}
SAFE_FREE(dbuf.dptr);
/* 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, ("send_entry_request: add name: %s#%02x ttl = %d first IP %s flags = %2x\n",
name, type, ttl, inet_ntoa(ip_list[0]), nb_flags));
/* add the record to the list to send */
version=((SMB_BIG_UINT)high)<<32 | low;
if (wins_owner->min_version<=version && wins_owner->max_version>=version &&
wins_owner->address.s_addr==wins_ip.s_addr) {
if(!add_record_to_winsname(&r->rep.se_rp.wins_name, &max_names, name, type, wins_flags, version, ip_list, num_ips))
return;
max_names++;
}
} else {
DEBUG(4, ("send_entry_request: 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));
}
}
tdb_close(tdb);
DEBUG(4,("send_entry_request, sending %d records\n", max_names));
fill_header(r, OPCODE_NON_NBT, s_ctx, MESSAGE_TYPE_REPLICATE);
r->rep.msg_type=MESSAGE_REP_SEND_ENTRIES_REPLY; /* reply */
r->rep.se_rp.max_names=max_names;
}
/****************************************************************************
.
****************************************************************************/
static void update_notify_request(GENERIC_PACKET *q, GENERIC_PACKET *r)
{
int i,j,k,l;
UPDATE_NOTIFY_REQUEST *u;
int s_ctx=get_server_assoc(q->header.assoc_ctx);
if (s_ctx==0) {
DEBUG(4, ("update_notify_request: request for a partner not in our table\n"));
stop_packet(q, r, STOP_REASON_USER_REASON);
return;
}
u=&q->rep.un_rq;
/* check if we already have the range of records */
DEBUG(5,("update_notify_request: wins server: %s offered this list of %d records:\n",
inet_ntoa(u->initiating_wins_server), u->partner_count));
get_our_last_id(&global_wins_table[0][0]);
for (i=0; i<partner_count; i++) {
if (global_wins_table[0][i].address.s_addr==u->initiating_wins_server.s_addr) {
DEBUG(5,("update_notify_request: found initiator at index %d\n", i));
break;
}
}
/*
* some explanation is required, before someone say it's crap.
*
* let's take an example, we have 2 wins partners, we already now
* that our max id is 10, partner 1 ID is 20 and partner 2 ID is 30
* the array looks like:
*
* 0 1 2
* 0 10 20 30
* 1
* 2
*
* we receive an update from partner 2 saying he has: 1:15, 2:40, 3:50
* we must enlarge the array to add partner 3, it will look like:
*
* 0 1 2 3
* 0 10 20 30
* 1
* 2 15 40 50
*
* now we know, we should pull from partner 2, the records 30->40 of 2 and 0->50 of 3.
* once the pull will be over, our table will look like:
*
* 0 1 2 3
* 0 10 20 40 50
* 1
* 2 15 40 50
*
*
*/
for (j=0; j<u->partner_count;j++) {
/*
* search if we already have this entry or if it's a new one
* it can be a new one in case of propagation
*/
for (k=0; global_wins_table[0][k].address.s_addr!=0 &&
global_wins_table[0][k].address.s_addr!=u->wins_owner[j].address.s_addr; k++);
global_wins_table[i][k].address.s_addr=u->wins_owner[j].address.s_addr;
global_wins_table[i][k].max_version=u->wins_owner[j].max_version;
global_wins_table[i][k].min_version=u->wins_owner[j].min_version;
global_wins_table[i][k].type=u->wins_owner[j].type;
/*
* in case it's a new one, rewrite the address for all the partner
* to reserve the slot.
*/
for(l=0; l<partner_count; l++)
global_wins_table[l][k].address.s_addr=u->wins_owner[j].address.s_addr;
}
dump_global_table();
stop_packet(q, r, STOP_REASON_USER_REASON);
}
/****************************************************************************
.
****************************************************************************/
static void send_entry_reply(GENERIC_PACKET *q, GENERIC_PACKET *r)
{
int i,j,k;
struct in_addr partner, server;
pid_t pid;
int s_ctx=get_server_assoc(q->header.assoc_ctx);
WINS_RECORD record;
if (s_ctx==0) {
DEBUG(1, ("send_entry_reply: request for a partner not in our table\n"));
stop_packet(q, r, STOP_REASON_USER_REASON);
return;
}
DEBUG(5,("send_entry_reply:got %d new records\n", q->rep.se_rp.max_names));
/* we got records from a wins partner but that can be from another wins server */
/* hopefully we track that */
/* and the only doc available from MS is wrong ! */
get_server_assoc_table(q->header.assoc_ctx, &partner, &server);
for (j=0; global_wins_table[0][j].address.s_addr!=0; j++) {
if (global_wins_table[0][j].address.s_addr==server.s_addr) {
DEBUG(5,("send_entry_reply: found server at index %d\n", j));
break;
}
}
pid = pidfile_pid("nmbd");
if (pid == 0) {
DEBUG(0,("send_entry_reply: Can't find pid for nmbd\n"));
return;
}
for (k=0; k<q->rep.se_rp.max_names; k++) {
DEBUG(5,("send_entry_reply: %s<%02x> %d\n", q->rep.se_rp.wins_name[k].name, q->rep.se_rp.wins_name[k].type,
(int)q->rep.se_rp.wins_name[k].id));
safe_strcpy(record.name, q->rep.se_rp.wins_name[k].name, 16);
record.type=q->rep.se_rp.wins_name[k].type;
record.id=q->rep.se_rp.wins_name[k].id;
record.wins_flags=q->rep.se_rp.wins_name[k].name_flag&0x00ff;
record.num_ips=q->rep.se_rp.wins_name[k].num_ip;
record.wins_ip.s_addr=server.s_addr;
if (record.num_ips==1)
record.ip[0]=q->rep.se_rp.wins_name[k].owner;
else
for (i=0; i<record.num_ips; i++)
record.ip[i]=q->rep.se_rp.wins_name[k].others[i];
record.nb_flags=0;
if (record.wins_flags&WINS_NGROUP || record.wins_flags&WINS_SGROUP)
record.nb_flags|=NB_GROUP;
if (record.wins_flags&WINS_ACTIVE)
record.nb_flags|=NB_ACTIVE;
record.nb_flags|=record.wins_flags&WINS_HNODE;
message_send_pid(pid, MSG_WINS_NEW_ENTRY, &record, sizeof(record), False);
}
dump_global_table();
/*
* we got some entries,
* ask the partner to send us the map table again
* to get the other servers entries.
*
* we're getting the map table 1 time more than really
* required. We could remove that call, but that
* would complexify the code. I prefer this trade-of.
*/
fill_header(r, OPCODE_NON_NBT, s_ctx, MESSAGE_TYPE_REPLICATE);
r->rep.msg_type=MESSAGE_REP_ADD_VERSION_REQUEST;
}
/****************************************************************************
decode the replication message and reply.
****************************************************************************/
static void replicate(GENERIC_PACKET *q, GENERIC_PACKET *r)
{
switch (q->rep.msg_type) {
case 0:
/* add version number map table request */
send_version_number_map_table(q, r);
break;
case 1:
receive_version_number_map_table(q, r);
break;
case 2:
/* send entry request */
send_entry_request(q, r);
break;
case 3:
/* send entry reply */
send_entry_reply(q, r);
break;
case 4:
/* update notification request */
update_notify_request(q, r);
break;
}
}
/****************************************************************************
do a switch on the message type, and return the response size
****************************************************************************/
static BOOL switch_message(GENERIC_PACKET *q, GENERIC_PACKET *r)
{
switch (q->header.mess_type) {
case 0:
/* Start association type */
start_assoc_process(q, r);
return True;
break;
case 1:
/* start association reply */
start_assoc_reply(q, r);
return True;
break;
case 2:
/* stop association message */
return False;
break;
case 3:
/* replication message */
replicate(q, r);
return True;
break;
}
return False;
}
/****************************************************************************
construct a reply to the incoming packet
****************************************************************************/
void construct_reply(struct wins_packet_struct *p)
{
GENERIC_PACKET r;
struct BUFFER buffer;
buffer.buffer=NULL;
buffer.offset=0;
buffer.length=0;
DEBUG(5,("dump: received packet\n"));
dump_generic_packet(p->packet);
/* Verify if the request we got is from a listed partner */
if (!check_partner(p->packet->header.assoc_ctx)) {
fstring peer;
struct in_addr addr;
int i;
fstrcpy(peer,get_socket_addr(p->fd));
addr=*interpret_addr2(peer);
for (i=1; i<partner_count; i++)
if (ip_equal(addr, global_wins_table[0][i].address))
break;
if (i==partner_count) {
DEBUG(1,("construct_reply: got a request from a non peer machine: %s\n", peer));
stop_packet(p->packet, &r, STOP_REASON_AUTH_FAILED);
p->stop_packet=True;
encode_generic_packet(&buffer, &r);
if (!send_smb(p->fd, buffer.buffer))
exit_server("process_smb: send_smb failed.");
return;
}
}
if (switch_message(p->packet, &r)) {
encode_generic_packet(&buffer, &r);
DEBUG(5,("dump: sending packet\n"));
dump_generic_packet(&r);
if(buffer.offset > 0) {
if (!send_smb(p->fd, buffer.buffer))
exit_server("process_smb: send_smb failed.");
}
}
/* if we got a stop assoc or if we send a stop assoc, close the fd after */
if (p->packet->header.mess_type==MESSAGE_TYPE_STOP_ASSOC ||
r.header.mess_type==MESSAGE_TYPE_STOP_ASSOC) {
remove_partner(p->packet->header.assoc_ctx);
p->stop_packet=True;
}
}
/****************************************************************************
contact periodically our wins partner to do a pull replication
****************************************************************************/
void run_pull_replication(time_t t)
{
/* we pull every 30 minutes to query about new records*/
int i, s;
struct BUFFER buffer;
GENERIC_PACKET p;
buffer.buffer=NULL;
buffer.offset=0;
buffer.length=0;
for (i=1; i<partner_count; i++) {
if (global_wins_table[0][i].last_pull < t) {
global_wins_table[0][i].last_pull=t+30*60; /* next in 30 minutes */
/* contact the wins server */
p.header.mess_type=MESSAGE_TYPE_START_ASSOC_REQUEST;
p.header.opcode=OPCODE_NON_NBT;
p.header.assoc_ctx=0;
p.sa_rq.assoc_ctx=(int)t;
p.sa_rq.min_ver=1;
p.sa_rq.maj_ver=1;
DEBUG(3,("run_pull_replication: contacting wins server %s.\n", inet_ntoa(global_wins_table[0][i].address)));
encode_generic_packet(&buffer, &p);
dump_generic_packet(&p);
/* send the packet to the server and add the descriptor to receive answers */
s=open_socket_out(SOCK_STREAM, &global_wins_table[0][i].address, 42, LONG_CONNECT_TIMEOUT);
if (s==-1) {
DEBUG(0,("run_pull_replication: can't contact wins server %s.\n", inet_ntoa(global_wins_table[0][i].address)));
return;
}
if(buffer.offset > 0) {
if (!send_smb(s, buffer.buffer))
exit_server("run_pull_replication: send_smb failed.");
}
add_fd_to_sock_array(s);
FD_SET(s, listen_set);
/* add ourself as a client */
add_partner((int)t, 0, True, False);
}
}
}
/****************************************************************************
contact periodically our wins partner to do a push replication
****************************************************************************/
void run_push_replication(time_t t)
{
/* we push every 30 minutes or 25 new entries */
int i, s;
struct BUFFER buffer;
GENERIC_PACKET p;
buffer.buffer=NULL;
buffer.offset=0;
buffer.length=0;
for (i=1; i<partner_count; i++) {
if (global_wins_table[0][i].last_pull < t) {
global_wins_table[0][i].last_pull=t+30*60; /* next in 30 minutes */
/* contact the wins server */
p.header.mess_type=MESSAGE_TYPE_START_ASSOC_REQUEST;
p.header.opcode=OPCODE_NON_NBT;
p.header.assoc_ctx=0;
p.sa_rq.assoc_ctx=(int)t;
p.sa_rq.min_ver=1;
p.sa_rq.maj_ver=1;
DEBUG(3,("run_push_replication: contacting wins server %s.\n", inet_ntoa(global_wins_table[0][i].address)));
encode_generic_packet(&buffer, &p);
dump_generic_packet(&p);
/* send the packet to the server and add the descriptor to receive answers */
s=open_socket_out(SOCK_STREAM, &global_wins_table[0][i].address, 42, LONG_CONNECT_TIMEOUT);
if (s==-1) {
DEBUG(0,("run_push_replication: can't contact wins server %s.\n", inet_ntoa(global_wins_table[0][i].address)));
return;
}
if(buffer.offset > 0) {
if (!send_smb(s, buffer.buffer))
exit_server("run_push_replication: send_smb failed.");
}
add_fd_to_sock_array(s);
FD_SET(s, listen_set);
/* add ourself as a client */
add_partner((int)t, 0, False, True);
}
}
}
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