udhcpd: fix a bug in add_lease where it was reading at [-1]
It is not correct when we read lease file!
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/networking/udhcp/serverpacket.c b/networking/udhcp/serverpacket.c
index c3724e0..b48e415 100644
--- a/networking/udhcp/serverpacket.c
+++ b/networking/udhcp/serverpacket.c
@@ -130,7 +130,8 @@
uint32_t req_nip;
uint32_t lease_time_sec = server_config.max_lease_sec;
uint32_t static_lease_ip;
- uint8_t *req_ip_opt, *p_host_name;
+ uint8_t *req_ip_opt;
+ const char *p_host_name;
struct option_set *curr;
struct in_addr addr;
@@ -173,8 +174,13 @@
bb_error_msg("no IP addresses to give - OFFER abandoned");
return -1;
}
- p_host_name = get_option(oldpacket, DHCP_HOST_NAME);
- if (!add_lease(packet.chaddr, packet.yiaddr, server_config.offer_time, p_host_name)) {
+ p_host_name = (const char*) get_option(oldpacket, DHCP_HOST_NAME);
+ if (add_lease(packet.chaddr, packet.yiaddr,
+ server_config.offer_time,
+ p_host_name,
+ p_host_name ? (unsigned char)p_host_name[OPT_LEN - OPT_DATA] : 0
+ ) == 0
+ ) {
bb_error_msg("lease pool is full - OFFER abandoned");
return -1;
}
@@ -218,7 +224,7 @@
struct option_set *curr;
uint32_t lease_time_sec;
struct in_addr addr;
- uint8_t *p_host_name;
+ const char *p_host_name;
init_packet(&packet, oldpacket, DHCPACK);
packet.yiaddr = yiaddr;
@@ -242,8 +248,12 @@
if (send_packet(&packet, 0) < 0)
return -1;
- p_host_name = get_option(oldpacket, DHCP_HOST_NAME);
- add_lease(packet.chaddr, packet.yiaddr, lease_time_sec, p_host_name);
+ p_host_name = (const char*) get_option(oldpacket, DHCP_HOST_NAME);
+ add_lease(packet.chaddr, packet.yiaddr,
+ lease_time_sec,
+ p_host_name,
+ p_host_name ? (unsigned char)p_host_name[OPT_LEN - OPT_DATA] : 0
+ );
if (ENABLE_FEATURE_UDHCPD_WRITE_LEASES_EARLY) {
/* rewrite the file with leases at every new acceptance */
write_leases();