100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* static_leases.c -- Couple of functions to assist with storing and
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* retrieving data for static leases
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*
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* Wade Berrier <wberrier@myrealbox.com> September 2004
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*
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*/
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#include "common.h"
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#include "dhcpd.h"
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/* Takes the address of the pointer to the static_leases linked list,
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* Address to a 6 byte mac address
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* Address to a 4 byte ip address */
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int addStaticLease(struct static_lease **lease_struct, uint8_t *mac, uint32_t *ip)
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{
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struct static_lease *cur;
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struct static_lease *new_static_lease;
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/* Build new node */
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new_static_lease = xmalloc(sizeof(struct static_lease));
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new_static_lease->mac = mac;
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new_static_lease->ip = ip;
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new_static_lease->next = NULL;
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/* If it's the first node to be added... */
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if (*lease_struct == NULL) {
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*lease_struct = new_static_lease;
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} else {
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cur = *lease_struct;
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while (cur->next) {
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cur = cur->next;
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}
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cur->next = new_static_lease;
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}
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return 1;
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}
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/* Check to see if a mac has an associated static lease */
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uint32_t getIpByMac(struct static_lease *lease_struct, void *arg)
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{
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uint32_t return_ip;
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struct static_lease *cur = lease_struct;
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uint8_t *mac = arg;
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return_ip = 0;
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while (cur) {
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/* If the client has the correct mac */
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if (memcmp(cur->mac, mac, 6) == 0) {
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return_ip = *(cur->ip);
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}
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cur = cur->next;
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}
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return return_ip;
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}
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/* Check to see if an ip is reserved as a static ip */
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uint32_t reservedIp(struct static_lease *lease_struct, uint32_t ip)
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{
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struct static_lease *cur = lease_struct;
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uint32_t return_val = 0;
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while (cur) {
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/* If the client has the correct ip */
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if (*cur->ip == ip)
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return_val = 1;
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cur = cur->next;
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}
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return return_val;
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}
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#ifdef CONFIG_FEATURE_UDHCP_DEBUG
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/* Print out static leases just to check what's going on */
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/* Takes the address of the pointer to the static_leases linked list */
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void printStaticLeases(struct static_lease **arg)
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{
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/* Get a pointer to the linked list */
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struct static_lease *cur = *arg;
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while (cur) {
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/* printf("PrintStaticLeases: Lease mac Address: %x\n", cur->mac); */
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printf("PrintStaticLeases: Lease mac Value: %x\n", *(cur->mac));
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/* printf("PrintStaticLeases: Lease ip Address: %x\n", cur->ip); */
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printf("PrintStaticLeases: Lease ip Value: %x\n", *(cur->ip));
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cur = cur->next;
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}
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}
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#endif
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