1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * static_leases.c -- Couple of functions to assist with storing and
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4 | * retrieving data for static leases
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5 | *
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6 | * Wade Berrier <wberrier@myrealbox.com> September 2004
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7 | *
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8 | */
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9 |
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10 | #include "common.h"
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11 | #include "dhcpd.h"
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12 |
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13 |
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14 | /* Takes the address of the pointer to the static_leases linked list,
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15 | * Address to a 6 byte mac address
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16 | * Address to a 4 byte ip address */
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17 | int addStaticLease(struct static_lease **lease_struct, uint8_t *mac, uint32_t *ip)
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18 | {
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19 | struct static_lease *cur;
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20 | struct static_lease *new_static_lease;
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21 |
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22 | /* Build new node */
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23 | new_static_lease = xmalloc(sizeof(struct static_lease));
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24 | new_static_lease->mac = mac;
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25 | new_static_lease->ip = ip;
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26 | new_static_lease->next = NULL;
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27 |
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28 | /* If it's the first node to be added... */
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29 | if (*lease_struct == NULL) {
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30 | *lease_struct = new_static_lease;
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31 | } else {
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32 | cur = *lease_struct;
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33 | while (cur->next) {
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34 | cur = cur->next;
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35 | }
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36 |
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37 | cur->next = new_static_lease;
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38 | }
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39 |
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40 | return 1;
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41 | }
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42 |
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43 | /* Check to see if a mac has an associated static lease */
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44 | uint32_t getIpByMac(struct static_lease *lease_struct, void *arg)
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45 | {
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46 | uint32_t return_ip;
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47 | struct static_lease *cur = lease_struct;
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48 | uint8_t *mac = arg;
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49 |
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50 | return_ip = 0;
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51 |
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52 | while (cur) {
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53 | /* If the client has the correct mac */
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54 | if (memcmp(cur->mac, mac, 6) == 0) {
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55 | return_ip = *(cur->ip);
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56 | }
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57 |
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58 | cur = cur->next;
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59 | }
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60 |
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61 | return return_ip;
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62 | }
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63 |
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64 | /* Check to see if an ip is reserved as a static ip */
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65 | uint32_t reservedIp(struct static_lease *lease_struct, uint32_t ip)
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66 | {
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67 | struct static_lease *cur = lease_struct;
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68 |
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69 | uint32_t return_val = 0;
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70 |
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71 | while (cur) {
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72 | /* If the client has the correct ip */
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73 | if (*cur->ip == ip)
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74 | return_val = 1;
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75 |
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76 | cur = cur->next;
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77 | }
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78 |
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79 | return return_val;
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80 | }
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81 |
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82 | #if ENABLE_FEATURE_UDHCP_DEBUG
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83 | /* Print out static leases just to check what's going on */
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84 | /* Takes the address of the pointer to the static_leases linked list */
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85 | void printStaticLeases(struct static_lease **arg)
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86 | {
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87 | /* Get a pointer to the linked list */
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88 | struct static_lease *cur = *arg;
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89 |
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90 | while (cur) {
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91 | /* printf("PrintStaticLeases: Lease mac Address: %x\n", cur->mac); */
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92 | printf("PrintStaticLeases: Lease mac Value: %x\n", *(cur->mac));
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93 | /* printf("PrintStaticLeases: Lease ip Address: %x\n", cur->ip); */
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94 | printf("PrintStaticLeases: Lease ip Value: %x\n", *(cur->ip));
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95 |
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96 | cur = cur->next;
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97 | }
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98 | }
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99 | #endif
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