/* * 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 CONFIG_FEATURE_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