[821] | 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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