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udhcpd: code shrink

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function                                             old     new   delta
send_packet_verbose                                    -      35     +35
send_offer                                           443     423     -20
send_ACK                                             152     131     -21
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/2 up/down: 35/-41)             Total: -6 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2019-05-16 11:27:28 +02:00
parent a840884531
commit 25393fb55e
1 changed files with 12 additions and 8 deletions
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20
networking/udhcp/dhcpd.c
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@ -627,6 +627,15 @@ static void send_packet(struct dhcp_packet *dhcp_pkt, int force_broadcast)
send_packet_to_client(dhcp_pkt, force_broadcast);
}
static void send_packet_verbose(struct dhcp_packet *dhcp_pkt, const char *fmt)
{
struct in_addr addr;
addr.s_addr = dhcp_pkt->yiaddr;
bb_info_msg(fmt, inet_ntoa(addr));
/* send_packet emits error message itself if it detects failure */
send_packet(dhcp_pkt, /*force_bcast:*/ 0);
}
static void init_packet(struct dhcp_packet *packet, struct dhcp_packet *oldpacket, char type)
{
/* Sets op, htype, hlen, cookie fields
@ -722,7 +731,6 @@ static NOINLINE void send_offer(struct dhcp_packet *oldpacket,
{
struct dhcp_packet packet;
uint32_t lease_time_sec;
struct in_addr addr;
init_packet(&packet, oldpacket, DHCPOFFER);
@ -778,10 +786,8 @@ static NOINLINE void send_offer(struct dhcp_packet *oldpacket,
udhcp_add_simple_option(&packet, DHCP_LEASE_TIME, htonl(lease_time_sec));
add_server_options(&packet);
addr.s_addr = packet.yiaddr;
bb_info_msg("sending OFFER of %s", inet_ntoa(addr));
/* send_packet emits error message itself if it detects failure */
send_packet(&packet, /*force_bcast:*/ 0);
send_packet_verbose(&packet, "sending OFFER to %s");
}
/* NOINLINE: limit stack usage in caller */
@ -800,7 +806,6 @@ static NOINLINE void send_ACK(struct dhcp_packet *oldpacket, uint32_t yiaddr)
{
struct dhcp_packet packet;
uint32_t lease_time_sec;
struct in_addr addr;
const char *p_host_name;
init_packet(&packet, oldpacket, DHCPACK);
@ -810,9 +815,7 @@ static NOINLINE void send_ACK(struct dhcp_packet *oldpacket, uint32_t yiaddr)
udhcp_add_simple_option(&packet, DHCP_LEASE_TIME, htonl(lease_time_sec));
add_server_options(&packet);
addr.s_addr = yiaddr;
bb_info_msg("sending ACK to %s", inet_ntoa(addr));
send_packet(&packet, /*force_bcast:*/ 0);
send_packet_verbose(&packet, "sending ACK to %s");
p_host_name = (const char*) udhcp_get_option(oldpacket, DHCP_HOST_NAME);
add_lease(packet.chaddr, packet.yiaddr,
@ -852,6 +855,7 @@ static NOINLINE void send_inform(struct dhcp_packet *oldpacket)
add_server_options(&packet);
send_packet(&packet, /*force_bcast:*/ 0);
// or maybe? send_packet_verbose(&packet, "sending ACK to %s");
}
int udhcpd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;