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/*
Unix SMB/Netbios implementation.
Version 1.9.
NBT netbios library routines
Copyright (C) Andrew Tridgell 1994-1997
Copyright (C) Luke Kenneth Casson Leighton 1994-1997
Copyright (C) Jeremy Allison 1994-1997
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
extern int ClientNMB;
extern int DEBUGLEVEL;
extern pstring scope;
extern pstring myname;
extern struct in_addr ipzero;
int num_response_packets = 0;
/***************************************************************************
Add an expected response record into the list
**************************************************************************/
void add_response_record(struct subnet_record *subrec,
struct response_record *rrec)
{
struct response_record *rrec2;
num_response_packets++; /* count of total number of packets still around */
DEBUG(4,("add_response_record: adding response record id:%hu to subnet %s. num_records:%d\n",
rrec->response_id, subrec->subnet_name, num_response_packets));
if (!subrec->responselist)
{
subrec->responselist = rrec;
rrec->prev = NULL;
rrec->next = NULL;
return;
}
for (rrec2 = subrec->responselist; rrec2->next; rrec2 = rrec2->next)
;
rrec2->next = rrec;
rrec->next = NULL;
rrec->prev = rrec2;
}
/***************************************************************************
Remove an expected response record from the list
**************************************************************************/
void remove_response_record(struct subnet_record *subrec,
struct response_record *rrec)
{
if (rrec->prev)
rrec->prev->next = rrec->next;
if (rrec->next)
rrec->next->prev = rrec->prev;
if (subrec->responselist == rrec)
subrec->responselist = rrec->next;
if(rrec->userdata)
{
if(rrec->userdata->free_fn)
(*rrec->userdata->free_fn)(rrec->userdata);
else
free((char *)rrec->userdata);
}
/* Ensure we can delete. */
rrec->packet->locked = False;
free_packet(rrec->packet);
free((char *)rrec);
num_response_packets--; /* count of total number of packets still around */
}
/****************************************************************************
Create a response record for an outgoing packet.
**************************************************************************/
struct response_record *make_response_record( struct subnet_record *subrec,
struct packet_struct *p,
response_function resp_fn,
timeout_response_function timeout_fn,
success_function success_fn,
fail_function fail_fn,
struct userdata_struct *userdata)
{
struct response_record *rrec;
struct nmb_packet *nmb = &p->packet.nmb;
if (!(rrec = (struct response_record *)malloc(sizeof(*rrec))))
{
DEBUG(0,("make_response_queue_record: malloc fail for response_record.\n"));
return NULL;
}
bzero((char *)rrec, sizeof(*rrec));
rrec->response_id = nmb->header.name_trn_id;
rrec->resp_fn = resp_fn;
rrec->timeout_fn = timeout_fn;
rrec->success_fn = success_fn;
rrec->fail_fn = fail_fn;
rrec->packet = p;
if(userdata)
{
/* Intelligent userdata. */
if(userdata->copy_fn)
{
if((rrec->userdata = (*userdata->copy_fn)(userdata)) == NULL)
{
DEBUG(0,("make_response_queue_record: copy fail for userdata.\n"));
free(rrec);
return NULL;
}
}
else
{
/* Primitive userdata, do a memcpy. */
if((rrec->userdata = (struct userdata_struct *)
malloc(sizeof(struct userdata_struct)+userdata->userdata_len)) == NULL)
{
DEBUG(0,("make_response_queue_record: malloc fail for userdata.\n"));
free(rrec);
return NULL;
}
rrec->userdata->copy_fn = userdata->copy_fn;
rrec->userdata->free_fn = userdata->free_fn;
rrec->userdata->userdata_len = userdata->userdata_len;
memcpy(rrec->userdata->data, userdata->data, userdata->userdata_len);
}
}
else
rrec->userdata = NULL;
rrec->num_msgs = 0;
if(!nmb->header.nm_flags.bcast)
rrec->repeat_interval = 5; /* 5 seconds for unicast packets. */
else
rrec->repeat_interval = 1; /* XXXX should be in ms */
rrec->repeat_count = 3; /* 3 retries */
rrec->repeat_time = time(NULL) + rrec->repeat_interval; /* initial retry time */
/* Lock the packet so we won't lose it while it's on the list. */
p->locked = True;
add_response_record(subrec, rrec);
return rrec;
}
/****************************************************************************
Find a response in a subnet's name query response list.
**************************************************************************/
static struct response_record *find_response_record_on_subnet(
struct subnet_record *subrec, uint16 id)
{
struct response_record *rrec = NULL;
for (rrec = subrec->responselist; rrec; rrec = rrec->next)
{
if (rrec->response_id == id)
{
DEBUG(4, ("find_response_record: found response record id = %hu on subnet %s\n",
id, subrec->subnet_name));
break;
}
}
return rrec;
}
/****************************************************************************
Find a response in any subnet's name query response list.
**************************************************************************/
struct response_record *find_response_record(struct subnet_record **ppsubrec,
uint16 id)
{
struct response_record *rrec = NULL;
for ((*ppsubrec) = FIRST_SUBNET; (*ppsubrec);
(*ppsubrec) = NEXT_SUBNET_INCLUDING_UNICAST(*ppsubrec))
{
if((rrec = find_response_record_on_subnet(*ppsubrec, id)) != NULL)
return rrec;
}
/* There should never be response records on the remote_broadcast subnet.
Sanity check to ensure this is so. */
if(remote_broadcast_subnet->responselist != NULL)
{
DEBUG(0,("find_response_record: response record found on subnet %s. This should \
never happen !\n", remote_broadcast_subnet->subnet_name));
}
/* Now check the WINS server subnet if it exists. */
if(wins_server_subnet != NULL)
{
*ppsubrec = wins_server_subnet;
if((rrec = find_response_record_on_subnet(*ppsubrec, id))!= NULL)
return rrec;
}
DEBUG(0,("find_response_record: response packet id %hu received with no \
matching record.\n", id));
*ppsubrec = NULL;
return NULL;
}
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