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udhcpc6: add ELAPSED_TIME option to outgoing packets

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function                                             old     new   delta
init_d6_packet                                        53     121     +68
udhcpc_main                                         2577    2582      +5
udhcpc6_main                                        2593    2597      +4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 77/0)               Total: 77 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2019-09-24 14:01:00 +02:00
parent c58d785b9d
commit 11e024aa86
3 changed files with 21 additions and 5 deletions
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4
networking/udhcp/dhcpc.c
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@@ -606,7 +606,7 @@ static ALWAYS_INLINE uint32_t random_xid(void)
/* Initialize the packet with the proper defaults */
static void init_packet(struct dhcp_packet *packet, char type)
{
uint16_t secs;
unsigned secs;
/* Fill in: op, htype, hlen, cookie fields; message type option: */
udhcp_init_header(packet, type);
@@ -617,7 +617,7 @@ static void init_packet(struct dhcp_packet *packet, char type)
if (client_data.first_secs == 0)
client_data.first_secs = client_data.last_secs;
secs = client_data.last_secs - client_data.first_secs;
packet->secs = htons(secs);
packet->secs = (secs < 0xffff) ? htons(secs) : 0xffff;
memcpy(packet->chaddr, client_data.client_mac, 6);
if (client_data.clientid)