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udhcpd: disable opton to have absolute lease times in lease file

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(that does not work with dumpleases)
dumpleases: fix -a option.
networking/udhcp/*: code shrink, more compact static leases struture,
 better comments, etc

function                                             old     new   delta
find_free_or_expired_address                           -     147    +147
nobody_responds_to_arp                                 -      84     +84
read_opt                                             781     830     +49
dumpleases_main                                      435     447     +12
send_ACK                                             229     232      +3
read_staticlease                                      90      93      +3
addStaticLease                                        60      61      +1
getIpByMac                                            46      43      -3
reservedIp                                            31      20     -11
keywords                                             304     288     -16
send_offer                                           428     403     -25
write_leases                                         225     193     -32
read_leases                                          184     143     -41
read_yn                                               64       -     -64
find_address                                         191       -    -191
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 5/6 up/down: 299/-383)          Total: -84 bytes
This commit is contained in:
Denis Vlasenko
2009-01-01 17:52:09 +00:00
parent b2ec03813c
commit 0416e3dde1
7 changed files with 191 additions and 183 deletions
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15
networking/udhcp/dhcpd.c
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@@ -26,8 +26,7 @@ int udhcpd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int udhcpd_main(int argc UNUSED_PARAM, char **argv)
{
fd_set rfds;
struct timeval tv;
int server_socket = -1, bytes, retval, max_sock;
int server_socket = -1, retval, max_sock;
struct dhcpMessage packet;
uint8_t *state, *server_id, *requested;
uint32_t server_id_aligned = server_id_aligned; /* for compiler */
@@ -107,6 +106,8 @@ int udhcpd_main(int argc UNUSED_PARAM, char **argv)
timeout_end = monotonic_sec() + server_config.auto_time;
while (1) { /* loop until universe collapses */
int bytes;
struct timeval tv;
if (server_socket < 0) {
server_socket = udhcp_listen_socket(/*INADDR_ANY,*/ SERVER_PORT,
@@ -143,12 +144,15 @@ int udhcpd_main(int argc UNUSED_PARAM, char **argv)
case SIGTERM:
bb_info_msg("Received a SIGTERM");
goto ret0;
case 0: break; /* no signal */
default: continue; /* signal or error (probably EINTR) */
case 0: /* no signal: read a packet */
break;
default: /* signal or error (probably EINTR): back to select */
continue;
}
bytes = udhcp_recv_kernel_packet(&packet, server_socket); /* this waits for a packet - idle */
bytes = udhcp_recv_kernel_packet(&packet, server_socket);
if (bytes < 0) {
/* bytes can also be -2 ("bad packet data") */
if (bytes == -1 && errno != EINTR) {
DEBUG("error on read, %s, reopening socket", strerror(errno));
close(server_socket);
@@ -165,7 +169,6 @@ int udhcpd_main(int argc UNUSED_PARAM, char **argv)
/* Look for a static lease */
static_lease_ip = getIpByMac(server_config.static_leases, &packet.chaddr);
if (static_lease_ip) {
bb_info_msg("Found static lease: %x", static_lease_ip);