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socket_zep: fix undefined timestamp conversion behavior

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This commit is contained in:
Martine Lenders 2019-01-24 14:05:24 +01:00
parent d90d546053
commit 83bc4b162f
1 changed files with 7 additions and 1 deletions
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8
cpu/native/socket_zep/socket_zep.c
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@ -35,6 +35,9 @@
#include "debug.h"
#define _UNIX_NTP_ERA_OFFSET (2208988800U)
/* can't use timex.h's US_PER_SEC as timeval's tv_usec is signed long
* (https://pubs.opengroup.org/onlinepubs/9699919799.2016edition/basedefs/time.h.html) */
#define TV_USEC_PER_SEC (1000000L)
static size_t _zep_hdr_fill_v2_data(socket_zep_t *dev, zep_v2_data_hdr_t *hdr,
size_t payload_len)
@ -49,7 +52,10 @@ static size_t _zep_hdr_fill_v2_data(socket_zep_t *dev, zep_v2_data_hdr_t *hdr,
hdr->lqi_mode = 1;
hdr->lqi_val = 0xff; /* TODO: set */
hdr->time.seconds = byteorder_htonl(tv.tv_sec + _UNIX_NTP_ERA_OFFSET);
hdr->time.fraction = byteorder_htonl((tv.tv_usec * 1000000) / 232);
assert(tv.tv_usec < TV_USEC_PER_SEC);
hdr->time.fraction = byteorder_htonl(
(uint32_t)((uint64_t)tv.tv_usec * TV_USEC_PER_SEC) / 232U
);
hdr->seq = byteorder_htonl(dev->seq);
memset(hdr->resv, 0, sizeof(hdr->resv));
hdr->length = payload_len;