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Diffstat (limited to 'networking/udhcp/leases.c')
-rw-r--r--networking/udhcp/leases.c27
1 files changed, 14 insertions, 13 deletions
diff --git a/networking/udhcp/leases.c b/networking/udhcp/leases.c
index ceec073..997daea 100644
--- a/networking/udhcp/leases.c
+++ b/networking/udhcp/leases.c
@@ -95,24 +95,26 @@ struct dhcpOfferedAddr *find_lease_by_yiaddr(uint32_t yiaddr)
/* check is an IP is taken, if it is, add it to the lease table */
-static int check_ip(uint32_t addr)
+static int nobody_responds_to_arp(uint32_t addr)
{
static const uint8_t blank_chaddr[16]; /* 16 zero bytes */
struct in_addr temp;
+ int r;
- if (arpping(addr, server_config.server, server_config.arp, server_config.interface) == 0) {
- temp.s_addr = addr;
- bb_info_msg("%s belongs to someone, reserving it for %ld seconds",
- inet_ntoa(temp), server_config.conflict_time);
- add_lease(blank_chaddr, addr, server_config.conflict_time);
- return 1;
- }
+ r = arpping(addr, server_config.server, server_config.arp, server_config.interface);
+ if (r)
+ return r;
+
+ temp.s_addr = addr;
+ bb_info_msg("%s belongs to someone, reserving it for %u seconds",
+ inet_ntoa(temp), (unsigned)server_config.conflict_time);
+ add_lease(blank_chaddr, addr, server_config.conflict_time);
return 0;
}
-/* find an assignable address, it check_expired is true, we check all the expired leases as well.
+/* find an assignable address, if check_expired is true, we check all the expired leases as well.
* Maybe this should try expired leases by age... */
uint32_t find_address(int check_expired)
{
@@ -129,15 +131,14 @@ uint32_t find_address(int check_expired)
if ((addr & 0xFF) == 0xFF) continue;
/* Only do if it isn't assigned as a static lease */
- if (!reservedIp(server_config.static_leases, htonl(addr))) {
-
+ ret = htonl(addr);
+ if (!reservedIp(server_config.static_leases, ret)) {
/* lease is not taken */
- ret = htonl(addr);
lease = find_lease_by_yiaddr(ret);
/* no lease or it expired and we are checking for expired leases */
if ((!lease || (check_expired && lease_expired(lease)))
- && /* and it isn't on the network */ !check_ip(ret)
+ && nobody_responds_to_arp(ret) /* it isn't used on the network */
) {
return ret;
}