--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ NBT netbios library routines
+ Copyright (C) Andrew Tridgell 1994-1998
+ Copyright (C) Luke Kenneth Casson Leighton 1994-1998
+ Copyright (C) Jeremy Allison 1994-1998
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ 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;
+
+int num_response_packets = 0;
+
+/***************************************************************************
+ Add an expected response record into the list
+ **************************************************************************/
+
+static 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 {
+ ZERO_STRUCTP(rrec->userdata);
+ SAFE_FREE(rrec->userdata);
+ }
+ }
+
+ /* Ensure we can delete. */
+ rrec->packet->locked = False;
+ free_packet(rrec->packet);
+
+ ZERO_STRUCTP(rrec);
+ SAFE_FREE(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 = SMB_MALLOC_P(struct response_record))) {
+ DEBUG(0,("make_response_queue_record: malloc fail for response_record.\n"));
+ return NULL;
+ }
+
+ memset((char *)rrec, '\0', 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"));
+ ZERO_STRUCTP(rrec);
+ SAFE_FREE(rrec);
+ return NULL;
+ }
+ } else {
+ /* Primitive userdata, do a memcpy. */
+ if((rrec->userdata = (struct userdata_struct *)
+ SMB_MALLOC(sizeof(struct userdata_struct)+userdata->userdata_len)) == NULL) {
+ DEBUG(0,("make_response_queue_record: malloc fail for userdata.\n"));
+ ZERO_STRUCTP(rrec);
+ SAFE_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 */
+
+ /* This packet is not being processed. */
+ rrec->in_expiration_processing = False;
+
+ /* 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;
+}
+
+/****************************************************************************
+ Check if a refresh is queued for a particular name on a particular subnet.
+ **************************************************************************/
+
+BOOL is_refresh_already_queued(struct subnet_record *subrec, struct name_record *namerec)
+{
+ struct response_record *rrec = NULL;
+
+ for (rrec = subrec->responselist; rrec; rrec = rrec->next) {
+ struct packet_struct *p = rrec->packet;
+ struct nmb_packet *nmb = &p->packet.nmb;
+
+ if((nmb->header.opcode == NMB_NAME_REFRESH_OPCODE_8) ||
+ (nmb->header.opcode == NMB_NAME_REFRESH_OPCODE_9)) {
+ /* Yes it's a queued refresh - check if the name is correct. */
+ if(nmb_name_equal(&nmb->question.question_name, &namerec->name))
+ return True;
+ }
+ }
+
+ return False;
+}
projects / samba / blobdiff