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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