blob: f4a24ab627a955180f6d385dedb58b424fc42de5
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Storing and retrieving data for static leases |
4 | * |
5 | * Wade Berrier <wberrier@myrealbox.com> September 2004 |
6 | * |
7 | * Licensed under GPLv2, see file LICENSE in this source tree. |
8 | */ |
9 | #include "common.h" |
10 | #include "dhcpd.h" |
11 | |
12 | /* Takes the address of the pointer to the static_leases linked list, |
13 | * 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 | { |
19 | struct static_lease *st_lease; |
20 | |
21 | /* Find the tail of the list */ |
22 | while ((st_lease = *st_lease_pp) != NULL) { |
23 | st_lease_pp = &st_lease->next; |
24 | } |
25 | |
26 | /* 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 | } |
32 | |
33 | /* Find static lease IP by mac */ |
34 | uint32_t FAST_FUNC get_static_nip_by_mac(struct static_lease *st_lease, void *mac) |
35 | { |
36 | while (st_lease) { |
37 | if (memcmp(st_lease->mac, mac, 6) == 0) |
38 | return st_lease->nip; |
39 | st_lease = st_lease->next; |
40 | } |
41 | |
42 | return 0; |
43 | } |
44 | |
45 | /* 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 | { |
48 | while (st_lease) { |
49 | if (st_lease->nip == nip) |
50 | return 1; |
51 | st_lease = st_lease->next; |
52 | } |
53 | |
54 | return 0; |
55 | } |
56 | |
57 | #if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 2 |
58 | /* 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 | void FAST_FUNC log_static_leases(struct static_lease **st_lease_pp) |
61 | { |
62 | struct static_lease *cur; |
63 | |
64 | if (dhcp_verbose < 2) |
65 | return; |
66 | |
67 | cur = *st_lease_pp; |
68 | while (cur) { |
69 | 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 | cur = cur->next; |
75 | } |
76 | } |
77 | #endif |
78 |