networking/udhcp/static_leases.c

/* vi: set sw=4 ts=4: */
/*
 * static_leases.c -- Couple of functions to assist with storing and
 * retrieving data for static leases
 *
 * Wade Berrier <wberrier@myrealbox.com> September 2004
 *
 * Licensed under GPLv2, see file LICENSE in this tarball for details.
 */

#include "common.h"
#include "dhcpd.h"


/* Takes the address of the pointer to the static_leases linked list,
 * address to a 6 byte mac address,
 * 4 byte IP address */
void FAST_FUNC add_static_lease(struct static_lease **st_lease_pp,
		uint8_t *mac,
		uint32_t nip)
{
	struct static_lease *st_lease;

	/* Find the tail of the list */
	while ((st_lease = *st_lease_pp) != NULL) {
		st_lease_pp = &st_lease->next;
	}

	/* Add new node */
	*st_lease_pp = st_lease = xzalloc(sizeof(*st_lease));
	memcpy(st_lease->mac, mac, 6);
	st_lease->nip = nip;
	/*st_lease->next = NULL;*/
}

/* Find static lease IP by mac */
uint32_t FAST_FUNC get_static_nip_by_mac(struct static_lease *st_lease, void *mac)
{
	while (st_lease) {
		if (memcmp(st_lease->mac, mac, 6) == 0)
			return st_lease->nip;
		st_lease = st_lease->next;
	}

	return 0;
}

/* Check to see if an IP is reserved as a static IP */
int FAST_FUNC is_nip_reserved(struct static_lease *st_lease, uint32_t nip)
{
	while (st_lease) {
		if (st_lease->nip == nip)
			return 1;
		st_lease = st_lease->next;
	}

	return 0;
}

#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 2
/* Print out static leases just to check what's going on */
/* Takes the address of the pointer to the static_leases linked list */
void FAST_FUNC log_static_leases(struct static_lease **st_lease_pp)
{
	struct static_lease *cur;

	if (dhcp_verbose < 2)
		return;

	cur = *st_lease_pp;
	while (cur) {
		bb_info_msg("static lease: mac:%02x:%02x:%02x:%02x:%02x:%02x nip:%x",
			cur->mac[0], cur->mac[1], cur->mac[2],
			cur->mac[3], cur->mac[4], cur->mac[5],
			cur->nip
		);
		cur = cur->next;
	}
}
#endif
1	/* vi: set sw=4 ts=4: */
2	/*
3	* static_leases.c -- Couple of functions to assist with storing and
4	* retrieving data for static leases
5	*
6	* Wade Berrier <wberrier@myrealbox.com> September 2004
7	*
8	* Licensed under GPLv2, see file LICENSE in this tarball for details.
9	*/
10
11	#include "common.h"
12	#include "dhcpd.h"
13
14
15	/* Takes the address of the pointer to the static_leases linked list,
16	* address to a 6 byte mac address,
17	* 4 byte IP address */
18	void FAST_FUNC add_static_lease(struct static_lease **st_lease_pp,
19	uint8_t *mac,
20	uint32_t nip)
21	{
22	struct static_lease *st_lease;
23
24	/* Find the tail of the list */
25	while ((st_lease = *st_lease_pp) != NULL) {
26	st_lease_pp = &st_lease->next;
27	}
28
29	/* Add new node */
30	st_lease_pp = st_lease = xzalloc(sizeof(st_lease));
31	memcpy(st_lease->mac, mac, 6);
32	st_lease->nip = nip;
33	/st_lease->next = NULL;/
34	}
35
36	/* Find static lease IP by mac */
37	uint32_t FAST_FUNC get_static_nip_by_mac(struct static_lease st_lease, void mac)
38	{
39	while (st_lease) {
40	if (memcmp(st_lease->mac, mac, 6) == 0)
41	return st_lease->nip;
42	st_lease = st_lease->next;
43	}
44
45	return 0;
46	}
47
48	/* Check to see if an IP is reserved as a static IP */
49	int FAST_FUNC is_nip_reserved(struct static_lease *st_lease, uint32_t nip)
50	{
51	while (st_lease) {
52	if (st_lease->nip == nip)
53	return 1;
54	st_lease = st_lease->next;
55	}
56
57	return 0;
58	}
59
60	#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 2
61	/* Print out static leases just to check what's going on */
62	/* Takes the address of the pointer to the static_leases linked list */
63	void FAST_FUNC log_static_leases(struct static_lease **st_lease_pp)
64	{
65	struct static_lease *cur;
66
67	if (dhcp_verbose < 2)
68	return;
69
70	cur = *st_lease_pp;
71	while (cur) {
72	bb_info_msg("static lease: mac:%02x:%02x:%02x:%02x:%02x:%02x nip:%x",
73	cur->mac[0], cur->mac[1], cur->mac[2],
74	cur->mac[3], cur->mac[4], cur->mac[5],
75	cur->nip
76	);
77	cur = cur->next;
78	}
79	}
80	#endif