1 | /*
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2 | * static_leases.c -- Couple of functions to assist with storing and
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3 | * 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 | */
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8 |
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9 |
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10 | #include <stdlib.h>
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11 | #include <stdio.h>
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12 | #include <string.h>
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13 |
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14 | #include "static_leases.h"
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15 | #include "dhcpd.h"
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16 |
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17 | /* Takes the address of the pointer to the static_leases linked list,
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18 | * Address to a 6 byte mac address
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19 | * Address to a 4 byte ip address */
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20 | int addStaticLease(struct static_lease **lease_struct, uint8_t *mac, uint32_t *ip)
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21 | {
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22 |
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23 | struct static_lease *cur;
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24 | struct static_lease *new_static_lease;
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25 |
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26 | /* Build new node */
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27 | new_static_lease = xmalloc(sizeof(struct static_lease));
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28 | new_static_lease->mac = mac;
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29 | new_static_lease->ip = ip;
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30 | new_static_lease->next = NULL;
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31 |
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32 | /* If it's the first node to be added... */
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33 | if(*lease_struct == NULL)
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34 | {
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35 | *lease_struct = new_static_lease;
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36 | }
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37 | else
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38 | {
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39 | cur = *lease_struct;
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40 | while(cur->next != NULL)
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41 | {
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42 | cur = cur->next;
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43 | }
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44 |
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45 | cur->next = new_static_lease;
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46 | }
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47 |
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48 | return 1;
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49 |
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50 | }
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51 |
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52 | /* Check to see if a mac has an associated static lease */
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53 | uint32_t getIpByMac(struct static_lease *lease_struct, void *arg)
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54 | {
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55 | uint32_t return_ip;
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56 | struct static_lease *cur = lease_struct;
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57 | uint8_t *mac = arg;
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58 |
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59 | return_ip = 0;
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60 |
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61 | while(cur != NULL)
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62 | {
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63 | /* If the client has the correct mac */
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64 | if(memcmp(cur->mac, mac, 6) == 0)
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65 | {
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66 | return_ip = *(cur->ip);
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67 | }
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68 |
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69 | cur = cur->next;
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70 | }
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71 |
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72 | return return_ip;
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73 |
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74 | }
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75 |
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76 | /* Check to see if an ip is reserved as a static ip */
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77 | uint32_t reservedIp(struct static_lease *lease_struct, uint32_t ip)
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78 | {
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79 | struct static_lease *cur = lease_struct;
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80 |
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81 | uint32_t return_val = 0;
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82 |
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83 | while(cur != NULL)
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84 | {
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85 | /* If the client has the correct ip */
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86 | if(*cur->ip == ip)
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87 | return_val = 1;
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88 |
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89 | cur = cur->next;
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90 | }
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91 |
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92 | return return_val;
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93 |
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94 | }
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95 |
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96 | #ifdef CONFIG_FEATURE_UDHCP_DEBUG
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97 | /* Print out static leases just to check what's going on */
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98 | /* Takes the address of the pointer to the static_leases linked list */
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99 | void printStaticLeases(struct static_lease **arg)
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100 | {
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101 | /* Get a pointer to the linked list */
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102 | struct static_lease *cur = *arg;
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103 |
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104 | while(cur != NULL)
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105 | {
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106 | /* printf("PrintStaticLeases: Lease mac Address: %x\n", cur->mac); */
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107 | printf("PrintStaticLeases: Lease mac Value: %x\n", *(cur->mac));
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108 | /* printf("PrintStaticLeases: Lease ip Address: %x\n", cur->ip); */
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109 | printf("PrintStaticLeases: Lease ip Value: %x\n", *(cur->ip));
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110 |
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111 | cur = cur->next;
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112 | }
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113 |
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114 |
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115 | }
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116 | #endif
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117 |
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118 |
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119 |
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