On 2017-01-31 at 23:31:34 +0100, Vadim Kochan <[email protected]> wrote:
> Add pcap_get_tstamp(...) function to get packet's timestamp considering
> different packet types & bytes order.
>
> Signed-off-by: Vadim Kochan <[email protected]>
> ---
> pcap_io.h | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 53 insertions(+)
>
> diff --git a/pcap_io.h b/pcap_io.h
> index 4e41362..7bf5fe6 100644
> --- a/pcap_io.h
> +++ b/pcap_io.h
> @@ -373,6 +373,59 @@ static inline void pcap_set_length(pcap_pkthdr_t *phdr,
> enum pcap_type type, u32
> }
> }
>
> +static inline void pcap_get_tstamp(pcap_pkthdr_t *phdr, enum pcap_type type,
> + struct timeval *tv)
This should take a struct timespec in order to retain nanosecond
precision.
> +{
> + switch (type) {
> + case DEFAULT:
> + case DEFAULT_LL:
> + tv->tv_sec = phdr->ppo.ts.tv_sec;
> + tv->tv_usec = phdr->ppo.ts.tv_usec;
> + break;
> +
> + case DEFAULT_SWAPPED:
> + case DEFAULT_LL_SWAPPED:
> + tv->tv_sec = ___constant_swab32(phdr->ppo.ts.tv_sec);
> + tv->tv_usec = ___constant_swab32(phdr->ppo.ts.tv_usec);
> + break;
> +
> + case NSEC:
> + case NSEC_LL:
> + tv->tv_sec = phdr->ppn.ts.tv_sec;
> + tv->tv_usec = phdr->ppn.ts.tv_nsec / 1000;
> + break;
> +
> + case NSEC_SWAPPED:
> + case NSEC_LL_SWAPPED:
> + tv->tv_sec = ___constant_swab32(phdr->ppn.ts.tv_sec);
> + tv->tv_usec = ___constant_swab32(phdr->ppn.ts.tv_nsec) / 1000;
> + break;
> +
> + case KUZNETZOV:
> + tv->tv_sec = phdr->ppk.ts.tv_sec;
> + tv->tv_usec = phdr->ppk.ts.tv_usec;
> + break;
> +
> + case KUZNETZOV_SWAPPED:
> + tv->tv_sec = ___constant_swab32(phdr->ppk.ts.tv_sec);
> + tv->tv_usec = ___constant_swab32(phdr->ppk.ts.tv_usec);
> + break;
> +
> + case BORKMANN:
> + tv->tv_sec = phdr->ppb.ts.tv_sec;
> + tv->tv_usec = phdr->ppb.ts.tv_nsec / 1000;
> + break;
> +
> + case BORKMANN_SWAPPED:
> + tv->tv_sec = ___constant_swab32(phdr->ppb.ts.tv_sec);
> + tv->tv_usec = ___constant_swab32(phdr->ppb.ts.tv_nsec) / 1000;
> + break;
> +
> + default:
> + bug();
> + }
> +}
> +
> static inline u32 pcap_get_hdr_length(pcap_pkthdr_t *phdr, enum pcap_type
> type)
> {
> switch (type) {
> --
> 2.11.0
>
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