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udhcpd: code shrink

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function                                             old     new   delta
is_nip_reserved_as_static                              -      28     +28
get_static_nip_by_mac                                 43      47      +4
udhcpd_main                                         1459    1454      -5
send_offer                                           449     444      -5
read_leases                                          309     299     -10
is_nip_reserved                                       20       -     -20
packed_usage                                       33283   33243     -40
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 1/4 up/down: 32/-80)            Total: -48 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2019-05-10 15:55:12 +02:00
parent 94f607a904
commit 15021f393d
1 changed files with 10 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
networking/udhcp/dhcpd.c
View File

@@ -70,8 +70,10 @@ static void add_static_lease(struct static_lease **st_lease_pp,
}
/* Find static lease IP by mac */
static uint32_t get_static_nip_by_mac(struct static_lease *st_lease, void *mac)
static uint32_t get_static_nip_by_mac(void *mac)
{
struct static_lease *st_lease = server_config.static_leases;
while (st_lease) {
if (memcmp(st_lease->mac, mac, 6) == 0)
return st_lease->nip;
@@ -81,8 +83,10 @@ static uint32_t get_static_nip_by_mac(struct static_lease *st_lease, void *mac)
return 0;
}
static int is_nip_reserved(struct static_lease *st_lease, uint32_t nip)
static int is_nip_reserved_as_static(uint32_t nip)
{
struct static_lease *st_lease = server_config.static_leases;
while (st_lease) {
if (st_lease->nip == nip)
return 1;
@@ -288,7 +292,7 @@ static uint32_t find_free_or_expired_nip(const uint8_t *safe_mac, unsigned arppi
if (nip == server_config.server_nip)
goto next_addr;
/* is this a static lease addr? */
if (is_nip_reserved(server_config.static_leases, nip))
if (is_nip_reserved_as_static(nip))
goto next_addr;
lease = find_lease_by_nip(nip);
@@ -518,13 +522,13 @@ static NOINLINE void read_leases(const char *file)
expires = 0;
/* Check if there is a different static lease for this IP or MAC */
static_nip = get_static_nip_by_mac(server_config.static_leases, lease.lease_mac);
static_nip = get_static_nip_by_mac(lease.lease_mac);
if (static_nip) {
/* NB: we do not add lease even if static_nip == lease.lease_nip.
*/
continue;
}
if (is_nip_reserved(server_config.static_leases, lease.lease_nip))
if (is_nip_reserved_as_static(lease.lease_nip))
continue;
/* NB: add_lease takes "relative time", IOW,
@@ -999,7 +1003,7 @@ int udhcpd_main(int argc UNUSED_PARAM, char **argv)
}
/* Look for a static/dynamic lease */
static_lease_nip = get_static_nip_by_mac(server_config.static_leases, &packet.chaddr);
static_lease_nip = get_static_nip_by_mac(&packet.chaddr);
if (static_lease_nip) {
bb_info_msg("found static lease: %x", static_lease_nip);
memcpy(&fake_lease.lease_mac, &packet.chaddr, 6);