seek_list.c

支持IPv6的adov路由协议（本人修改后）

/*****************************************************************************
 *
 * Copyright (C) 2001 Uppsala University and Ericsson AB.
 * Copyright (C) 2003 Simon Fraser University and NewMIC
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Authors: Erik Nordstr鰉, <[e-mail]>
 *        : Peter Lee       <[e-mail]>
 *          
 *
 *****************************************************************************/
#include <stdlib.h>

#ifdef NS_PORT
#include "aodv-uu.h"
#else
#include "seek_list.h"
#include "timer_queue.h"
#include "ipv6_utils.h"
#include "aodv_timeout.h"
#include "defs.h"
#include "params.h"
#include "debug.h"
#endif

#ifndef NS_PORT
/* The seek list is a linked list of destinations we are seeking
   (with RREQ's). */
static seek_list_t *seek_list_head = NULL;

#ifdef SEEK_LIST_DEBUG
void seek_list_print();
#endif
#endif				/* NS_PORT */

//PL
#ifdef _IPV6
seek_list_t *NS_CLASS seek_list_insert(struct in6_addr dest_addr,
				       u_int32_t dest_seqno,
                                       //PL: ttl need to be changed later
				       int ttl, u_int8_t flags,
				       struct ip_data *ipd)
#else
seek_list_t *NS_CLASS seek_list_insert(u_int32_t dest_addr,
				       u_int32_t dest_seqno,
				       int ttl, u_int8_t flags,
				       struct ip_data *ipd)
#endif /* _IPV6 */
{
    seek_list_t *entry;

    if ((entry = (seek_list_t *) malloc(sizeof(seek_list_t))) < 0) {
	fprintf(stderr, "seek_list_insert: Failed malloc\n");
	exit(-1);
    }
    //PL
#ifdef _IPV6
    memcpy(&entry->dest_addr, &dest_addr, sizeof(dest_addr));
#else
    entry->dest_addr = dest_addr;
#endif /* _IPV6 */
    entry->dest_seqno = dest_seqno;
    entry->flags = flags;
    entry->to_internet=0;
    entry->reqs = 0;
    entry->ttl = ttl;
    entry->ipd = ipd;
    entry->seek_timer.handler = &NS_CLASS route_discovery_timeout;
    entry->seek_timer.data = entry;
    entry->next = seek_list_head;
    seek_list_head = entry;

    return entry;
}

//PL
#ifdef _IPV6
int NS_CLASS seek_list_remove(struct in6_addr dest_addr)
#else
int NS_CLASS seek_list_remove(u_int32_t dest_addr)
#endif /* _IPV6 */
{
    seek_list_t *curr, *prev;

    curr = seek_list_head;
    prev = NULL;

    while (curr != NULL) {
      //PL
#ifdef _IPV6
      if (memcmp(&curr->dest_addr, &dest_addr, sizeof(dest_addr)) == 0) {
#else
	if (curr->dest_addr == dest_addr) {
#endif /* _IPV6 */
	    if (prev == NULL)
		seek_list_head = curr->next;
	    else
		prev->next = curr->next;

	    /* Make sure any timers are removed */
	    timer_remove(&curr->seek_timer);

	    if (curr->ipd)
		free(curr->ipd);
	    free(curr);
	    return 1;
	}
	prev = curr;
	curr = curr->next;
    }
    return 0;
}

//PL
#ifdef _IPV6
seek_list_t *NS_CLASS seek_list_find(struct in6_addr dest_addr)
#else
seek_list_t *NS_CLASS seek_list_find(u_int32_t dest_addr)
#endif /* _IPV6 */
{
    seek_list_t *entry;

    entry = seek_list_head;

    while (entry != NULL) {
      //PL
#ifdef _IPV6
      if (memcmp(&entry->dest_addr, &dest_addr, sizeof(dest_addr)) == 0)
#else
	if (entry->dest_addr == dest_addr)
#endif /* _IPV6 */
	    return entry;
	entry = entry->next;
    }
    return NULL;
}

//#ifdef SEEK_LIST_DEBUG
void NS_CLASS seek_list_print()
{
    seek_list_t *entry;
    //PL:
#ifdef _IPV6
    for (entry = seek_list_head; entry != NULL; entry = entry->next) {
	printf("%s %u %d %d\n", ip6_to_str(entry->dest_addr),
	       entry->dest_seqno, entry->reqs, entry->ttl);
    }
#else
    for (entry = seek_list_head; entry != NULL; entry = entry->next) {
	printf("%s %u %d %d\n", ip_to_str(entry->dest_addr),
	       entry->dest_seqno, entry->reqs, entry->ttl);
    }
#endif /* _IPV6 */
}
//#endif
dest_list_t *seek_list_find_i()
{
	seek_list_t *entry;
	dest_list_t *head=NULL,*tmp=NULL;
	entry=seek_list_head;
	while(entry!=NULL){
		if(entry->to_internet){
			if((tmp=(dest_list_t *)malloc(sizeof(dest_list_t)))==NULL){
				fprintf(stderr,"malloc failed!\n");
				exit(1);
			}
			if(head==NULL){
				head=tmp;
				head->next=NULL;
			}else{
				tmp->next=head;
				head=tmp;
			}
			head->dest_addr=entry->dest_addr;
		}
		entry=entry->next;
	}
	return head;
}