networking/udhcp/static_leases.c

/* vi: set sw=4 ts=4: */
/*
 * 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	niro	532	/* vi: set sw=4 ts=4: */
2			/*
3	niro	1123	* Storing and retrieving data for static leases
4	niro	532	*
5			* Wade Berrier <wberrier@myrealbox.com> September 2004
6			*
7	niro	984	* Licensed under GPLv2, see file LICENSE in this tarball for details.
8	niro	532	*/
9			#include "common.h"
10			#include "dhcpd.h"
11
12			/* Takes the address of the pointer to the static_leases linked list,
13	niro	984	* address to a 6 byte mac address,
14			* 4 byte IP address */
15			void FAST_FUNC add_static_lease(struct static_lease **st_lease_pp,
16			uint8_t *mac,
17			uint32_t nip)
18	niro	532	{
19	niro	984	struct static_lease *st_lease;
20	niro	532
21	niro	984	/* Find the tail of the list */
22			while ((st_lease = *st_lease_pp) != NULL) {
23			st_lease_pp = &st_lease->next;
24	niro	532	}
25
26	niro	984	/* Add new node */
27			st_lease_pp = st_lease = xzalloc(sizeof(st_lease));
28			memcpy(st_lease->mac, mac, 6);
29			st_lease->nip = nip;
30			/st_lease->next = NULL;/
31	niro	532	}
32
33	niro	984	/* Find static lease IP by mac */
34			uint32_t FAST_FUNC get_static_nip_by_mac(struct static_lease st_lease, void mac)
35	niro	532	{
36	niro	984	while (st_lease) {
37			if (memcmp(st_lease->mac, mac, 6) == 0)
38			return st_lease->nip;
39			st_lease = st_lease->next;
40	niro	532	}
41
42	niro	984	return 0;
43	niro	532	}
44
45	niro	984	/* Check to see if an IP is reserved as a static IP */
46			int FAST_FUNC is_nip_reserved(struct static_lease *st_lease, uint32_t nip)
47	niro	532	{
48	niro	984	while (st_lease) {
49			if (st_lease->nip == nip)
50			return 1;
51			st_lease = st_lease->next;
52	niro	532	}
53
54	niro	984	return 0;
55	niro	532	}
56
57	niro	984	#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 2
58	niro	532	/* Print out static leases just to check what's going on */
59			/* Takes the address of the pointer to the static_leases linked list */
60	niro	984	void FAST_FUNC log_static_leases(struct static_lease **st_lease_pp)
61	niro	532	{
62	niro	984	struct static_lease *cur;
63	niro	532
64	niro	984	if (dhcp_verbose < 2)
65			return;
66
67			cur = *st_lease_pp;
68	niro	532	while (cur) {
69	niro	984	bb_info_msg("static lease: mac:%02x:%02x:%02x:%02x:%02x:%02x nip:%x",
70			cur->mac[0], cur->mac[1], cur->mac[2],
71			cur->mac[3], cur->mac[4], cur->mac[5],
72			cur->nip
73			);
74	niro	532	cur = cur->next;
75			}
76			}
77			#endif