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81 lines
1.9 KiB
C
81 lines
1.9 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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* Licensed under GPLv2, see file LICENSE in this tarball for details.
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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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* 4 byte IP address */
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void FAST_FUNC add_static_lease(struct static_lease **st_lease_pp,
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uint8_t *mac,
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uint32_t nip)
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{
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struct static_lease *st_lease;
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/* Find the tail of the list */
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while ((st_lease = *st_lease_pp) != NULL) {
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st_lease_pp = &st_lease->next;
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}
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/* Add new node */
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*st_lease_pp = st_lease = xzalloc(sizeof(*st_lease));
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memcpy(st_lease->mac, mac, 6);
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st_lease->nip = nip;
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/*st_lease->next = NULL;*/
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}
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/* Find static lease IP by mac */
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uint32_t FAST_FUNC get_static_nip_by_mac(struct static_lease *st_lease, void *mac)
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{
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while (st_lease) {
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if (memcmp(st_lease->mac, mac, 6) == 0)
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return st_lease->nip;
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st_lease = st_lease->next;
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}
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return 0;
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}
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/* Check to see if an IP is reserved as a static IP */
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int FAST_FUNC is_nip_reserved(struct static_lease *st_lease, uint32_t nip)
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{
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while (st_lease) {
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if (st_lease->nip == nip)
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return 1;
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st_lease = st_lease->next;
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}
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return 0;
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}
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#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 2
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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 FAST_FUNC log_static_leases(struct static_lease **st_lease_pp)
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{
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struct static_lease *cur;
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if (dhcp_verbose < 2)
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return;
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cur = *st_lease_pp;
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while (cur) {
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bb_info_msg("static lease: mac:%02x:%02x:%02x:%02x:%02x:%02x nip:%x",
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cur->mac[0], cur->mac[1], cur->mac[2],
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cur->mac[3], cur->mac[4], cur->mac[5],
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cur->nip
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);
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cur = cur->next;
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}
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}
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#endif
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