/* * static_leases.c -- Couple of functions to assist with storing and * retrieving data for static leases * * Wade Berrier <wberrier@myrealbox.com> September 2004 * */ #include <stdlib.h> #include <stdio.h> #include <string.h> #include "static_leases.h" #include "dhcpd.h" /* Takes the address of the pointer to the static_leases linked list, * Address to a 6 byte mac address * Address to a 4 byte ip address */ int addStaticLease(struct static_lease **lease_struct, uint8_t *mac, uint32_t *ip) { struct static_lease *cur; struct static_lease *new_static_lease; /* Build new node */ new_static_lease = xmalloc(sizeof(struct static_lease)); new_static_lease->mac = mac; new_static_lease->ip = ip; new_static_lease->next = NULL; /* If it's the first node to be added... */ if(*lease_struct == NULL) { *lease_struct = new_static_lease; } else { cur = *lease_struct; while(cur->next != NULL) { cur = cur->next; } cur->next = new_static_lease; } return 1; } /* Check to see if a mac has an associated static lease */ uint32_t getIpByMac(struct static_lease *lease_struct, void *arg) { uint32_t return_ip; struct static_lease *cur = lease_struct; uint8_t *mac = arg; return_ip = 0; while(cur != NULL) { /* If the client has the correct mac */ if(memcmp(cur->mac, mac, 6) == 0) { return_ip = *(cur->ip); } cur = cur->next; } return return_ip; } /* Check to see if an ip is reserved as a static ip */ uint32_t reservedIp(struct static_lease *lease_struct, uint32_t ip) { struct static_lease *cur = lease_struct; uint32_t return_val = 0; while(cur != NULL) { /* If the client has the correct ip */ if(*cur->ip == ip) return_val = 1; cur = cur->next; } return return_val; } #ifdef UDHCP_DEBUG /* Print out static leases just to check what's going on */ /* Takes the address of the pointer to the static_leases linked list */ void printStaticLeases(struct static_lease **arg) { /* Get a pointer to the linked list */ struct static_lease *cur = *arg; while(cur != NULL) { /* printf("PrintStaticLeases: Lease mac Address: %x\n", cur->mac); */ printf("PrintStaticLeases: Lease mac Value: %x\n", *(cur->mac)); /* printf("PrintStaticLeases: Lease ip Address: %x\n", cur->ip); */ printf("PrintStaticLeases: Lease ip Value: %x\n", *(cur->ip)); cur = cur->next; } } #endif