diff options
Diffstat (limited to 'networking/udhcp/static_leases.c')
-rw-r--r-- | networking/udhcp/static_leases.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/networking/udhcp/static_leases.c b/networking/udhcp/static_leases.c new file mode 100644 index 0000000..43f1c98 --- /dev/null +++ b/networking/udhcp/static_leases.c @@ -0,0 +1,99 @@ +/* vi: set sw=4 ts=4: */ +/* + * static_leases.c -- Couple of functions to assist with storing and + * retrieving data for static leases + * + * Wade Berrier <wberrier@myrealbox.com> September 2004 + * + */ + +#include "common.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 FAST_FUNC 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) { + cur = cur->next; + } + + cur->next = new_static_lease; + } + + return 1; +} + +/* Check to see if a mac has an associated static lease */ +uint32_t FAST_FUNC 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) { + /* 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 FAST_FUNC reservedIp(struct static_lease *lease_struct, uint32_t ip) +{ + struct static_lease *cur = lease_struct; + + uint32_t return_val = 0; + + while (cur) { + /* If the client has the correct ip */ + if (*cur->ip == ip) + return_val = 1; + + cur = cur->next; + } + + return return_val; +} + +#if ENABLE_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 FAST_FUNC printStaticLeases(struct static_lease **arg) +{ + /* Get a pointer to the linked list */ + struct static_lease *cur = *arg; + + while (cur) { + /* 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 |