Logo Search packages:      
Sourcecode: udhcp version File versions

static_leases.c

/*
 * static_leases.c -- Couple of functions to assist with storing and
 * retrieving data for static leases
 *
 * Wade Berrier <wberrier@myrealbox.com> September 2004
 *
 */


#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "static_leases.h"
#include "dhcpd.h"

/* Takes the address of the pointer to the static_leases linked list,
 *   Address to a 6 byte mac address
 *   Address to a 4 byte ip address */
int addStaticLease(struct static_lease **lease_struct, uint8_t *mac, uint32_t *ip)
{

      struct static_lease *cur;
      struct static_lease *new_static_lease;

      /* Build new node */
      new_static_lease = xmalloc(sizeof(struct static_lease));
      new_static_lease->mac = mac;
      new_static_lease->ip = ip;
      new_static_lease->next = NULL;

      /* If it's the first node to be added... */
      if(*lease_struct == NULL)
      {
            *lease_struct = new_static_lease;
      }
      else
      {
            cur = *lease_struct;
            while(cur->next != NULL)
            {
                  cur = cur->next;
            }

            cur->next = new_static_lease;
      }

      return 1;

}

/* Check to see if a mac has an associated static lease */
uint32_t getIpByMac(struct static_lease *lease_struct, void *arg)
{
      uint32_t return_ip;
      struct static_lease *cur = lease_struct;
      uint8_t *mac = arg;

      return_ip = 0;

      while(cur != NULL)
      {
            /* If the client has the correct mac  */
            if(memcmp(cur->mac, mac, 6) == 0)
            {
                  return_ip = *(cur->ip);
            }

            cur = cur->next;
      }

      return return_ip;

}

/* Check to see if an ip is reserved as a static ip */
uint32_t reservedIp(struct static_lease *lease_struct, uint32_t ip)
{
      struct static_lease *cur = lease_struct;

      uint32_t return_val = 0;

      while(cur != NULL)
      {
            /* If the client has the correct ip  */
            if(*cur->ip == ip)
                  return_val = 1;

            cur = cur->next;
      }

      return return_val;

}

#ifdef UDHCP_DEBUG
/* Print out static leases just to check what's going on */
/* Takes the address of the pointer to the static_leases linked list */
void printStaticLeases(struct static_lease **arg)
{
      /* Get a pointer to the linked list */
      struct static_lease *cur = *arg;

      while(cur != NULL)
      {
            /* printf("PrintStaticLeases: Lease mac Address: %x\n", cur->mac); */
            printf("PrintStaticLeases: Lease mac Value: %x\n", *(cur->mac));
            /* printf("PrintStaticLeases: Lease ip Address: %x\n", cur->ip); */
            printf("PrintStaticLeases: Lease ip Value: %x\n", *(cur->ip));

            cur = cur->next;
      }


}
#endif




Generated by  Doxygen 1.6.0   Back to index