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authorDenys Vlasenko <vda.linux@googlemail.com>2011-11-06 23:54:27 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2011-11-06 23:54:27 (GMT)
commit0fd4347cedd1d32341e827c04dd36aaaf2e8040d (patch)
treecfa6535363f0b28d2cd7f4bcd90688132e4b68cc
parent3b46fcb95d1276c538f4c84b63eec33cc27ac760 (diff)
downloadbusybox-0fd4347cedd1d32341e827c04dd36aaaf2e8040d.tar.gz
busybox-0fd4347cedd1d32341e827c04dd36aaaf2e8040d.tar.bz2
udhcpc: code shrink
function old new delta udhcpc_main 2646 2649 +3 udhcp_run_script 816 802 -14 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--networking/udhcp/dhcpc.c40
1 files changed, 18 insertions, 22 deletions
diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index ea798a3..f202ecf 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -499,9 +499,6 @@ static void udhcp_run_script(struct dhcp_packet *packet, const char *name)
char **envp, **curr;
char *argv[3];
- if (client_config.script == NULL)
- return;
-
envp = fill_envp(packet);
/* call script */
@@ -1009,7 +1006,7 @@ static void perform_renew(void)
}
}
-static void perform_release(uint32_t requested_ip, uint32_t server_addr)
+static void perform_release(uint32_t server_addr, uint32_t requested_ip)
{
char buffer[sizeof("255.255.255.255")];
struct in_addr temp_addr;
@@ -1154,15 +1151,12 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
uint32_t server_addr = server_addr; /* for compiler */
uint32_t requested_ip = 0;
uint32_t xid = 0;
- uint32_t lease_seconds = 0; /* can be given as 32-bit quantity */
int packet_num;
int timeout; /* must be signed */
unsigned already_waited_sec;
unsigned opt;
int max_fd;
int retval;
- struct timeval tv;
- struct dhcp_packet packet;
fd_set rfds;
/* Default options */
@@ -1302,6 +1296,8 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
* "continue" statements in code below jump to the top of the loop.
*/
for (;;) {
+ struct timeval tv;
+ struct dhcp_packet packet;
/* silence "uninitialized!" warning */
unsigned timestamp_before_wait = timestamp_before_wait;
@@ -1349,7 +1345,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
NULL,
client_config.client_mac)
) {
- return 1; /* iface is gone? */
+ goto ret0; /* iface is gone? */
}
if (clientid_mac_ptr)
memcpy(clientid_mac_ptr, client_config.client_mac, 6);
@@ -1486,13 +1482,11 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
timeout = 0;
continue;
case SIGUSR2:
- perform_release(requested_ip, server_addr);
+ perform_release(server_addr, requested_ip);
timeout = INT_MAX;
continue;
case SIGTERM:
bb_info_msg("Received SIGTERM");
- if (opt & OPT_R) /* release on quit */
- perform_release(requested_ip, server_addr);
goto ret0;
}
@@ -1589,6 +1583,9 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
case RENEW_REQUESTED:
case REBINDING:
if (*message == DHCPACK) {
+ uint32_t lease_seconds;
+ struct in_addr temp_addr;
+
temp = udhcp_get_option(&packet, DHCP_LEASE_TIME);
if (!temp) {
bb_error_msg("no lease time with ACK, using 1 hour lease");
@@ -1597,9 +1594,11 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
/* it IS unaligned sometimes, don't "optimize" */
move_from_unaligned32(lease_seconds, temp);
lease_seconds = ntohl(lease_seconds);
- lease_seconds &= 0x0fffffff; /* paranoia: must not be prone to overflows */
- if (lease_seconds < 10) /* and not too small */
- lease_seconds = 10;
+ /* paranoia: must not be too small and not prone to overflows */
+ if (lease_seconds < 0x10)
+ lease_seconds = 0x10;
+ if (lease_seconds >= 0x10000000)
+ lease_seconds = 0x0fffffff;
}
#if ENABLE_FEATURE_UDHCPC_ARPING
if (opt & OPT_a) {
@@ -1637,20 +1636,15 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
#endif
/* enter bound state */
timeout = lease_seconds / 2;
- {
- struct in_addr temp_addr;
- temp_addr.s_addr = packet.yiaddr;
- bb_info_msg("Lease of %s obtained, lease time %u",
- inet_ntoa(temp_addr), (unsigned)lease_seconds);
- }
+ temp_addr.s_addr = packet.yiaddr;
+ bb_info_msg("Lease of %s obtained, lease time %u",
+ inet_ntoa(temp_addr), (unsigned)lease_seconds);
requested_ip = packet.yiaddr;
udhcp_run_script(&packet, state == REQUESTING ? "bound" : "renew");
state = BOUND;
change_listen_mode(LISTEN_NONE);
if (opt & OPT_q) { /* quit after lease */
- if (opt & OPT_R) /* release on quit */
- perform_release(requested_ip, server_addr);
goto ret0;
}
/* future renew failures should not exit (JM) */
@@ -1688,6 +1682,8 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
} /* for (;;) - main loop ends */
ret0:
+ if (opt & OPT_R) /* release on quit */
+ perform_release(server_addr, requested_ip);
retval = 0;
ret:
/*if (client_config.pidfile) - remove_pidfile has its own check */