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udhcp: cleanup of static lease handling

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2009-06-16 12:03:12 +02:00
parent 56f2d06c64
commit cab3a0127c
6 changed files with 45 additions and 48 deletions
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2
networking/udhcp/dhcpd.c
View File

@ -166,7 +166,7 @@ int udhcpd_main(int argc UNUSED_PARAM, char **argv)
}
/* Look for a static lease */
static_lease_ip = getIpByMac(server_config.static_leases, &packet.chaddr);
static_lease_ip = get_static_nip_by_mac(server_config.static_leases, &packet.chaddr);
if (static_lease_ip) {
bb_info_msg("Found static lease: %x", static_lease_ip);

18
networking/udhcp/dhcpd.h
View File

@ -23,7 +23,7 @@ struct option_set {
struct static_lease {
struct static_lease *next;
uint32_t ip;
uint32_t nip;
uint8_t mac[6];
};
@ -97,15 +97,15 @@ uint32_t find_free_or_expired_address(const uint8_t *chaddr) FAST_FUNC;
/*** static_leases.h ***/
/* Config file will pass static lease info to this function which will add it
* to a data structure that can be searched later */
void addStaticLease(struct static_lease **lease_struct, uint8_t *mac, uint32_t ip) FAST_FUNC;
/* Check to see if a mac has an associated static lease */
uint32_t getIpByMac(struct static_lease *lease_struct, void *arg) FAST_FUNC;
/* Check to see if an ip is reserved as a static ip */
int reservedIp(struct static_lease *lease_struct, uint32_t ip) FAST_FUNC;
/* Config file parser will pass static lease info to this function
* which will add it to a data structure that can be searched later */
void add_static_lease(struct static_lease **st_lease_pp, uint8_t *mac, uint32_t nip) FAST_FUNC;
/* Find static lease IP by mac */
uint32_t get_static_nip_by_mac(struct static_lease *st_lease, void *arg) FAST_FUNC;
/* Check to see if an IP is reserved as a static IP */
int is_nip_reserved(struct static_lease *st_lease, uint32_t nip) FAST_FUNC;
/* Print out static leases just to check what's going on (debug code) */
void printStaticLeases(struct static_lease **lease_struct) FAST_FUNC;
void print_static_leases(struct static_lease **st_lease_pp) FAST_FUNC;
/*** serverpacket.h ***/

4
networking/udhcp/files.c
View File

@ -268,9 +268,9 @@ static int FAST_FUNC read_staticlease(const char *const_line, void *arg)
ip_string = strtok_r(NULL, " \t", &line);
read_nip(ip_string, &ip);
addStaticLease(arg, (uint8_t*) &mac_bytes, ip);
add_static_lease(arg, (uint8_t*) &mac_bytes, ip);
if (ENABLE_UDHCP_DEBUG) printStaticLeases(arg);
if (ENABLE_UDHCP_DEBUG) print_static_leases(arg);
return 1;
}

4
networking/udhcp/leases.c
View File

@ -159,8 +159,8 @@ uint32_t FAST_FUNC find_free_or_expired_address(const uint8_t *chaddr)
if ((addr & 0xff) == 0xff)
continue;
net_addr = htonl(addr);
/* addr has a static lease? */
if (reservedIp(server_config.static_leases, net_addr))
/* is this a static lease addr? */
if (is_nip_reserved(server_config.static_leases, net_addr))
continue;
lease = find_lease_by_yiaddr(net_addr);

2
networking/udhcp/serverpacket.c
View File

@ -120,7 +120,7 @@ int FAST_FUNC send_offer(struct dhcpMessage *oldpacket)
init_packet(&packet, oldpacket, DHCPOFFER);
static_lease_ip = getIpByMac(server_config.static_leases, oldpacket->chaddr);
static_lease_ip = get_static_nip_by_mac(server_config.static_leases, oldpacket->chaddr);
/* ADDME: if static, short circuit */
if (!static_lease_ip) {

63
networking/udhcp/static_leases.c
View File

@ -13,48 +13,45 @@
/* 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 */
void FAST_FUNC addStaticLease(struct static_lease **lease_struct, uint8_t *mac, uint32_t ip)
* address to a 6 byte mac address,
* 4 byte IP address */
void FAST_FUNC add_static_lease(struct static_lease **st_lease_pp,
uint8_t *mac,
uint32_t nip)
{
struct static_lease *new_static_lease;
struct static_lease *st_lease;
/* Build new node */
new_static_lease = xzalloc(sizeof(struct static_lease));
memcpy(new_static_lease->mac, mac, 6);
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 {
struct static_lease *cur = *lease_struct;
while (cur->next)
cur = cur->next;
cur->next = new_static_lease;
/* Find the tail of the list */
while ((st_lease = *st_lease_pp) != NULL) {
st_lease_pp = &st_lease->next;
}
/* Add new node */
*st_lease_pp = st_lease = xzalloc(sizeof(*st_lease));
memcpy(st_lease->mac, mac, 6);
st_lease->nip = nip;
/*st_lease->next = NULL;*/
}
/* Check to see if a mac has an associated static lease */
uint32_t FAST_FUNC getIpByMac(struct static_lease *lease_struct, void *mac)
/* Find static lease IP by mac */
uint32_t FAST_FUNC get_static_nip_by_mac(struct static_lease *st_lease, void *mac)
{
while (lease_struct) {
if (memcmp(lease_struct->mac, mac, 6) == 0)
return lease_struct->ip;
lease_struct = lease_struct->next;
while (st_lease) {
if (memcmp(st_lease->mac, mac, 6) == 0)
return st_lease->nip;
st_lease = st_lease->next;
}
return 0;
}
/* Check to see if an ip is reserved as a static ip */
int FAST_FUNC reservedIp(struct static_lease *lease_struct, uint32_t ip)
/* Check to see if an IP is reserved as a static IP */
int FAST_FUNC is_nip_reserved(struct static_lease *st_lease, uint32_t nip)
{
while (lease_struct) {
if (lease_struct->ip == ip)
while (st_lease) {
if (st_lease->nip == nip)
return 1;
lease_struct = lease_struct->next;
st_lease = st_lease->next;
}
return 0;
@ -63,16 +60,16 @@ int FAST_FUNC reservedIp(struct static_lease *lease_struct, uint32_t ip)
#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)
void FAST_FUNC print_static_leases(struct static_lease **st_lease_pp)
{
struct static_lease *cur = *arg;
struct static_lease *cur = *st_lease_pp;
while (cur) {
printf("PrintStaticLeases: Lease mac Value: %02x:%02x:%02x:%02x:%02x:%02x\n",
printf("PrintStaticLeases: lease mac: %02x:%02x:%02x:%02x:%02x:%02x\n",
cur->mac[0], cur->mac[1], cur->mac[2],
cur->mac[3], cur->mac[4], cur->mac[5]
);
printf("PrintStaticLeases: Lease ip Value: %x\n", cur->ip);
printf("PrintStaticLeases: lease ip: %x\n", cur->nip);
cur = cur->next;
}
}