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authorEric Andersen2004-10-08 08:49:26 +0000
committerEric Andersen2004-10-08 08:49:26 +0000
commitabf58d6ba5df9bbe04c4c7008cbbc8c7dc626392 (patch)
treec64a5328d250449c9a4e3964d59a657543e06440 /networking/udhcp/static_leases.c
parent751750e3ee0195eef802a1554e97712285bf8fd7 (diff)
downloadbusybox-abf58d6ba5df9bbe04c4c7008cbbc8c7dc626392.zip
busybox-abf58d6ba5df9bbe04c4c7008cbbc8c7dc626392.tar.gz
Wade Berrier writes:
Hello, Here's a patch for a first attempt at static leases for udhcpd. Included in the tarball are 2 files (static_leases.c, static_leases.h) and a patch against the latest cvs. In the config file you can configure static leases with the following format: static_lease 00:60:08:11:CE:4E 192.168.0.54 static_lease 00:60:08:11:CE:3E 192.168.0.44 Comments/suggestions/improvements are welcome. Wade
Diffstat (limited to 'networking/udhcp/static_leases.c')
-rw-r--r--networking/udhcp/static_leases.c119
1 files changed, 119 insertions, 0 deletions
diff --git a/networking/udhcp/static_leases.c b/networking/udhcp/static_leases.c
new file mode 100644
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+++ b/networking/udhcp/static_leases.c
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+/*
+ * 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
+
+
+