dhcpd: remember and record hostnames; optimize get_option
dumpleases: show hostnames
function old new delta
add_lease 230 292 +62
send_offer 403 421 +18
send_ACK 232 249 +17
read_leases 249 258 +9
dumpleases_main 604 609 +5
nobody_responds_to_arp 84 86 +2
udhcp_end_option 32 30 -2
udhcp_get_option 222 171 -51
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 6/2 up/down: 113/-53) Total: 60 bytes
diff --git a/networking/udhcp/leases.c b/networking/udhcp/leases.c
index 3044c20..d62f324 100644
--- a/networking/udhcp/leases.c
+++ b/networking/udhcp/leases.c
@@ -48,9 +48,12 @@
/* Add a lease into the table, clearing out any old ones */
-struct dhcpOfferedAddr* FAST_FUNC add_lease(const uint8_t *chaddr, uint32_t yiaddr, leasetime_t leasetime)
+struct dhcpOfferedAddr* FAST_FUNC add_lease(
+ const uint8_t *chaddr, uint32_t yiaddr,
+ leasetime_t leasetime, uint8_t *hostname)
{
struct dhcpOfferedAddr *oldest;
+ uint8_t hostname_length;
/* clean out any old ones */
clear_lease(chaddr, yiaddr);
@@ -58,6 +61,19 @@
oldest = oldest_expired_lease();
if (oldest) {
+ oldest->hostname[0] = '\0';
+ if (hostname) {
+ hostname_length = hostname[-1]; /* look at option size byte */
+ if (hostname_length > sizeof(oldest->hostname))
+ hostname_length = sizeof(oldest->hostname);
+ hostname = (uint8_t*) safe_strncpy((char*)oldest->hostname, (char*)hostname, hostname_length);
+ /* sanitization (s/non-ACSII/^/g) */
+ while (*hostname) {
+ if (*hostname < ' ' || *hostname > 126)
+ *hostname = '^';
+ hostname++;
+ }
+ }
memcpy(oldest->chaddr, chaddr, 16);
oldest->yiaddr = yiaddr;
oldest->expires = time(NULL) + leasetime;
@@ -117,7 +133,7 @@
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);
+ add_lease(blank_chaddr, addr, server_config.conflict_time, NULL);
return 0;
}