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