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udhcpc: code shrink, rename functions, no logic changes

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function                                             old     new   delta
d4_run_script                                          -     739    +739
d4_recv_raw_packet                                     -     484    +484
d4_run_script_deconfig                                 -      12     +12
perform_release                                      207     200      -7
udhcpc_main                                         2598    2556     -42
udhcp_recv_raw_packet                                484       -    -484
udhcp_run_script                                     739       -    -739
------------------------------------------------------------------------------
(add/remove: 3/2 grow/shrink: 0/2 up/down: 1235/-1272)        Total: -37 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2021-06-03 16:14:04 +02:00
parent 2f1d13d56a
commit f6def87a2e
2 changed files with 19 additions and 15 deletions
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4
networking/udhcp/d6_dhcpc.c
View File

@ -441,7 +441,7 @@ static char **fill_envp(const uint8_t *option, const uint8_t *option_end)
return envp;
}
/* Call a script with a par file and env vars */
/* Call a script with env vars */
static void d6_run_script(const uint8_t *option, const uint8_t *option_end,
const char *name)
{
@ -464,7 +464,7 @@ static void d6_run_script(const uint8_t *option, const uint8_t *option_end,
free(envp);
}
/* Call a script with a par file and no env var */
/* Call a script with no env var */
static void d6_run_script_no_option(const char *name)
{
d6_run_script(NULL, NULL, name);

30
networking/udhcp/dhcpc.c
View File

@ -566,8 +566,8 @@ static void fill_envp(struct dhcp_packet *packet)
}
}
/* Call a script with a par file and env vars */
static void udhcp_run_script(struct dhcp_packet *packet, const char *name)
/* Call a script with env vars */
static void d4_run_script(struct dhcp_packet *packet, const char *name)
{
char *argv[3];
@ -585,6 +585,10 @@ static void udhcp_run_script(struct dhcp_packet *packet, const char *name)
client_data.envp = NULL;
}
static void d4_run_script_deconfig(void)
{
d4_run_script(NULL, "deconfig");
}
/*** Sending/receiving packets ***/
@ -882,7 +886,7 @@ int send_release(uint32_t server, uint32_t ciaddr)
/* Returns -1 on errors that are fatal for the socket, -2 for those that aren't */
/* NOINLINE: limit stack usage in caller */
static NOINLINE int udhcp_recv_raw_packet(struct dhcp_packet *dhcp_pkt, int fd)
static NOINLINE int d4_recv_raw_packet(struct dhcp_packet *dhcp_pkt, int fd)
{
int bytes;
struct ip_udp_dhcp_packet packet;
@ -1143,7 +1147,7 @@ static void perform_release(uint32_t server_addr, uint32_t requested_ip)
* Users requested to be notified in all cases, even if not in one
* of the states above.
*/
udhcp_run_script(NULL, "deconfig");
d4_run_script_deconfig();
client_data.state = RELEASED;
}
@ -1374,7 +1378,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
srand(monotonic_us());
client_data.state = INIT_SELECTING;
udhcp_run_script(NULL, "deconfig");
d4_run_script_deconfig();
packet_num = 0;
timeout = 0;
lease_remaining = 0;
@ -1460,7 +1464,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
}
leasefail:
change_listen_mode(LISTEN_NONE);
udhcp_run_script(NULL, "leasefail");
d4_run_script(NULL, "leasefail");
#if BB_MMU /* -b is not supported on NOMMU */
if (opt & OPT_b) { /* background if no lease */
bb_simple_info_msg("no lease, forking to background");
@ -1555,7 +1559,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
/* Timed out, enter init state */
change_listen_mode(LISTEN_NONE);
bb_simple_info_msg("lease lost, entering init state");
udhcp_run_script(NULL, "deconfig");
d4_run_script_deconfig();
client_data.state = INIT_SELECTING;
client_data.first_secs = 0; /* make secs field count from 0 */
timeout = 0;
@ -1595,7 +1599,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
/* Two SIGUSR1 received, start things over */
case RENEW_REQUESTED:
change_listen_mode(LISTEN_NONE);
udhcp_run_script(NULL, "deconfig");
d4_run_script_deconfig();
/* Wake from SIGUSR2-induced deconfigured state */
default:
@ -1627,7 +1631,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
if (client_data.listen_mode == LISTEN_KERNEL)
len = udhcp_recv_kernel_packet(&packet, client_data.sockfd);
else
len = udhcp_recv_raw_packet(&packet, client_data.sockfd);
len = d4_recv_raw_packet(&packet, client_data.sockfd);
if (len == -1) {
/* Error is severe, reopen socket */
bb_error_msg("read error: "STRERROR_FMT", reopening socket" STRERROR_ERRNO);
@ -1772,7 +1776,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
send_decline(/*xid,*/ server_addr, packet.yiaddr);
if (client_data.state != REQUESTING)
udhcp_run_script(NULL, "deconfig");
d4_run_script_deconfig();
client_data.state = INIT_SELECTING;
client_data.first_secs = 0; /* make secs field count from 0 */
requested_ip = 0;
@ -1784,7 +1788,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
#endif
/* enter bound state */
start = monotonic_sec();
udhcp_run_script(&packet, client_data.state == REQUESTING ? "bound" : "renew");
d4_run_script(&packet, client_data.state == REQUESTING ? "bound" : "renew");
lease_remaining -= (unsigned)monotonic_sec() - start;
if (lease_remaining < 0)
lease_remaining = 0;
@ -1831,9 +1835,9 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
/* return to init state */
change_listen_mode(LISTEN_NONE);
bb_info_msg("received %s", "DHCP NAK");
udhcp_run_script(&packet, "nak");
d4_run_script(&packet, "nak");
if (client_data.state != REQUESTING)
udhcp_run_script(NULL, "deconfig");
d4_run_script_deconfig();
sleep(3); /* avoid excessive network traffic */
client_data.state = INIT_SELECTING;
client_data.first_secs = 0; /* make secs field count from 0 */