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/*
* 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
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