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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2019-05-15 13:08:48 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2019-05-15 13:08:48 +0200 |
| commit | 8402969d4892891ddfde524fbb9ee73e076f3771 (patch) | |
| tree | 67a83b2c0ca94141dc865bc34b75cbe1631f6eab /networking/udhcp | |
| parent | 63d765e666a8b23e3923acecdc41be71d5679439 (diff) | |
| download | busybox-8402969d4892891ddfde524fbb9ee73e076f3771.tar.gz | |
udhcpd: code shrink - do not fetch requested IP twice
function old new delta
send_offer 444 443 -1
udhcpd_main 1454 1442 -12
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-13) Total: -13 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'networking/udhcp')
| -rw-r--r-- | networking/udhcp/dhcpd.c | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/networking/udhcp/dhcpd.c b/networking/udhcp/dhcpd.c index 0642fc826..bf44320a1 100644 --- a/networking/udhcp/dhcpd.c +++ b/networking/udhcp/dhcpd.c @@ -662,7 +662,7 @@ static uint32_t select_lease_time(struct dhcp_packet *packet) static NOINLINE void send_offer(struct dhcp_packet *oldpacket, uint32_t static_lease_nip, struct dyn_lease *lease, - uint8_t *requested_ip_opt, + uint32_t requested_nip, unsigned arpping_ms) { struct dhcp_packet packet; @@ -676,7 +676,6 @@ static NOINLINE void send_offer(struct dhcp_packet *oldpacket, /* Else: */ if (!static_lease_nip) { /* We have no static lease for client's chaddr */ - uint32_t req_nip; const char *p_host_name; if (lease) { @@ -687,18 +686,16 @@ static NOINLINE void send_offer(struct dhcp_packet *oldpacket, packet.yiaddr = lease->lease_nip; } /* Or: if client has requested an IP */ - else if (requested_ip_opt != NULL - /* (read IP) */ - && (move_from_unaligned32(req_nip, requested_ip_opt), 1) + else if (requested_nip != 0 /* and the IP is in the lease range */ - && ntohl(req_nip) >= server_config.start_ip - && ntohl(req_nip) <= server_config.end_ip + && ntohl(requested_nip) >= server_config.start_ip + && ntohl(requested_nip) <= server_config.end_ip /* and */ - && ( !(lease = find_lease_by_nip(req_nip)) /* is not already taken */ + && ( !(lease = find_lease_by_nip(requested_nip)) /* is not already taken */ || is_expired_lease(lease) /* or is taken, but expired */ ) ) { - packet.yiaddr = req_nip; + packet.yiaddr = requested_nip; } else { /* Otherwise, find a free IP */ @@ -913,7 +910,7 @@ int udhcpd_main(int argc UNUSED_PARAM, char **argv) int tv; uint8_t *server_id_opt; uint8_t *requested_ip_opt; - uint32_t requested_nip = requested_nip; /* for compiler */ + uint32_t requested_nip; uint32_t static_lease_nip; struct dyn_lease *lease, fake_lease; @@ -1016,6 +1013,7 @@ int udhcpd_main(int argc UNUSED_PARAM, char **argv) } /* Get REQUESTED_IP if present */ + requested_nip = 0; requested_ip_opt = udhcp_get_option32(&packet, DHCP_REQUESTED_IP); if (requested_ip_opt) { move_from_unaligned32(requested_nip, requested_ip_opt); @@ -1026,7 +1024,7 @@ int udhcpd_main(int argc UNUSED_PARAM, char **argv) case DHCPDISCOVER: log1("received %s", "DISCOVER"); - send_offer(&packet, static_lease_nip, lease, requested_ip_opt, arpping_ms); + send_offer(&packet, static_lease_nip, lease, requested_nip, arpping_ms); break; case DHCPREQUEST: |