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207 lines
6.4 KiB
C
207 lines
6.4 KiB
C
/**HEADER********************************************************************
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*
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* Copyright (c) 2008 Freescale Semiconductor;
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* All Rights Reserved
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*
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* Copyright (c) 2004-2008 Embedded Access Inc.;
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* All Rights Reserved
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*
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* Copyright (c) 1989-2008 ARC International;
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* All Rights Reserved
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*
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***************************************************************************
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*
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* THIS SOFTWARE IS PROVIDED BY FREESCALE "AS IS" AND ANY EXPRESSED OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL FREESCALE OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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**************************************************************************
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*
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* $FileName: dnsinit.c$
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* $Version : 3.8.15.0$
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* $Date : Aug-10-2011$
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*
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* Comments:
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*
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* This file contains the Domain Name System resolver
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* initialization functions for RTCS.
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*
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*END************************************************************************/
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#include <rtcs.h>
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#include "rtcs_prv.h"
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#if RTCSCFG_ENABLE_UDP
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#if RTCSCFG_ENABLE_DNS
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#include "dns.h"
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/* Start CR 2170 */
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/*FUNCTION*-------------------------------------------------------------
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*
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* Function Name : DNS_init_unwind
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* Returned Value : void
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* Comments : cleans up after a DNS_init error
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*
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*END*-----------------------------------------------------------------*/
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static void DNS_init_unwind
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(
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DNS_CONTROL_STRUCT _PTR_ control_ptr,
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uint_32 sock
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)
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{ /* Body */
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RTCS_setcfg(DNS, NULL);
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if (sock)
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shutdown(sock, 0);
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if (control_ptr) {
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if (control_ptr->CNAME_PARTID)
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RTCS_part_destroy(control_ptr->CNAME_PARTID);
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if (control_ptr->RR_LIST_PARTID)
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RTCS_part_destroy(control_ptr->RR_LIST_PARTID);
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if (control_ptr->NAME_RR_PARTID)
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RTCS_part_destroy(control_ptr->NAME_RR_PARTID);
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if (control_ptr->INT_QUERY_PARTID)
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RTCS_part_destroy(control_ptr->INT_QUERY_PARTID);
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if (control_ptr->ADDR_RR_PARTID)
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RTCS_part_destroy(control_ptr->ADDR_RR_PARTID);
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_mem_free(control_ptr);
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}
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return;
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} /* Endbody */
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/* End CR 2170 */
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/*FUNCTION*-------------------------------------------------------------
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*
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* Function Name : DNS_init
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* Returned Value : DNS_OK or error code
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* Comments : Initializes the DNS task
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*
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*END*-----------------------------------------------------------------*/
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uint_32 DNS_init
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(
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void
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)
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{ /* Body */
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DNS_CONTROL_STRUCT _PTR_ control_ptr = RTCS_getcfg(DNS);
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uint_32 temp_socket = 0;
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int_32 error;
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if (control_ptr != NULL) {
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return RTCS_OK;
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}
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/*
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** Please note, if this is modified to use a value other than
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** DNS_MAX_UDP_MESSAGE_SIZE, the recvfrom() in the DNS_Resolver_task
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** will need to be modified as well, as they rely on this constant.
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*/
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control_ptr = RTCS_mem_alloc_system_zero(sizeof(DNS_CONTROL_STRUCT)+DNS_MAX_UDP_MESSAGE_SIZE);
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if (control_ptr == NULL) {
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return RTCSERR_DNS_UNABLE_TO_ALLOCATE_MEMORY;
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} /* Endif */
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_mem_set_type(control_ptr, MEM_TYPE_DNS_CONTROL_STRUCT);
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RTCS_setcfg(DNS, control_ptr);
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temp_socket = socket(PF_INET, SOCK_DGRAM, 0);
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if (temp_socket == RTCS_HANDLE_ERROR) {
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DNS_init_unwind(control_ptr, temp_socket);
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return RTCSERR_DNS_UNABLE_TO_OPEN_SOCKET;
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} /* Endif */
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error = RTCS_detachsock(temp_socket);
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if (error != RTCS_OK) {
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DNS_init_unwind(control_ptr, temp_socket);
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return error;
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} /* Endif */
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control_ptr->INT_QUERY_PARTID = RTCS_part_create(
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sizeof(DNS_INTERNAL_QUERY_STRUCT), DNSALLOC_SIZE, DNSALLOC_SIZE, 0,
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NULL, NULL);
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if (control_ptr->INT_QUERY_PARTID == 0) {
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DNS_init_unwind(control_ptr, temp_socket);
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return RTCSERR_DNS_UNABLE_TO_CREATE_PARTITION;
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} /* Endif */
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control_ptr->ADDR_RR_PARTID = RTCS_part_create(
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sizeof(DNS_ADDR_RECORD_STRUCT), DNSALLOC_SIZE, DNSALLOC_SIZE, 0,
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NULL, NULL);
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if (control_ptr->ADDR_RR_PARTID == 0) {
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DNS_init_unwind(control_ptr, temp_socket);
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return RTCSERR_DNS_UNABLE_TO_CREATE_PARTITION;
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} /* Endif */
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control_ptr->NAME_RR_PARTID = RTCS_part_create(
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sizeof(DNS_NAME_RECORD_STRUCT), DNSALLOC_SIZE, DNSALLOC_SIZE, 0,
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NULL, NULL);
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if (control_ptr->NAME_RR_PARTID == 0) {
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DNS_init_unwind(control_ptr, temp_socket);
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return RTCSERR_DNS_UNABLE_TO_CREATE_PARTITION;
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} /* Endif */
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control_ptr->RR_LIST_PARTID = RTCS_part_create(
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sizeof(DNS_RR_LIST_STRUCT), DNSALLOC_SIZE, DNSALLOC_SIZE, 0,
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NULL, NULL);
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if (control_ptr->RR_LIST_PARTID == 0) {
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DNS_init_unwind(control_ptr, temp_socket);
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return RTCSERR_DNS_UNABLE_TO_CREATE_PARTITION;
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} /* Endif */
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control_ptr->CNAME_PARTID = RTCS_part_create(
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sizeof(DNS_CNAME_STRUCT), DNSALLOC_SIZE, DNSALLOC_SIZE, 0,
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NULL, NULL);
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if (control_ptr->CNAME_PARTID == 0) {
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DNS_init_unwind(control_ptr, temp_socket);
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return RTCSERR_DNS_UNABLE_TO_CREATE_PARTITION;
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} /* Endif */
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control_ptr->ROOT_SLIST_PTR = DNS_A_Root_server;
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control_ptr->LOCAL_SLIST_PTR = DNS_First_Local_server;
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control_ptr->NS_BUFFER = NULL;
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control_ptr->RES_BUFFER = (uchar_ptr)(control_ptr + 1);
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control_ptr->RES_SOCKET = temp_socket;
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control_ptr->UPDATING = FALSE;
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error = RTCS_mutex_init(&control_ptr->CACHE_MUTEX);
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if (error != RTCS_OK) {
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DNS_init_unwind(control_ptr, temp_socket);
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return error;
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} /* Endif */
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error = RTCS_mutex_init(&control_ptr->SLIST_MUTEX);
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if (error != RTCS_OK) {
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DNS_init_unwind(control_ptr, temp_socket);
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return error;
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} /* Endif */
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error = RTCS_task_create("DNS Resolver", _RTCSTASK_priority,
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_RTCSTASK_stacksize + 500 * sizeof(uint_32),
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DNS_Resolver_task, control_ptr);
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if (error) {
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DNS_init_unwind(control_ptr, temp_socket);
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return error;
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} /* Endif */
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return RTCS_OK;
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} /* Endbody */
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#endif
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#endif
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/* EOF */
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