d56f51ea7d
As part of this, we import bpf_filter.c from NetBSD. Even though that file is part of the NetBSD kernel, it is also used by userland (as is clear here). Our LWIP service has its own bpf_filter.c implementation but that implementation has certain limits (e.g. on program size) that are fine for a system service but should not apply to userland. The libpcap code has a number of blocks guarded by __NetBSD__, but none of those blocks apply to MINIX 3. In particular, some of the alignment logic used for NetBSD may in fact not work in our case. Change-Id: Ib187e22d627c929e111d5d4a991c3bee3c0154cb
62 lines
2.2 KiB
Plaintext
62 lines
2.2 KiB
Plaintext
.\"Copyright (c) 2013, Michal Sekletar
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.\"All rights reserved.
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.\"
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.\"Redistribution and use in source and binary forms, with or without
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.\"modification, are permitted provided that the following conditions
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.\"are met:
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.\"
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in
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.\" the documentation and/or other materials provided with the
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.\" distribution.
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.\" 3. The names of the authors may not be used to endorse or promote
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.\" products derived from this software without specific prior
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.\" written permission.
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.\"
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.\"THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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.\"IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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.\"WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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.TH PCAP_SET_TSTAMP_PRECISION 3PCAP "27 August 2013"
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.SH NAME
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pcap_set_tstamp_precision \- set the time stamp precision returned in
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captures
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.SH SYNOPSIS
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.nf
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.ft B
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#include <pcap/pcap.h>
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.ft
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.LP
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.ft B
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int pcap_set_tstamp_precision(pcap_t *p, int tstamp_precision);
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.ft
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.fi
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.SH DESCRIPTION
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.B pcap_set_tstamp_precision()
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sets the precision of the time stamp desired for packets captured on the pcap
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descriptor to the type specified by
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.IR tstamp_precision .
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It must be called on a pcap descriptor created by
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.B pcap_create()
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that has not yet been activated by
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.BR pcap_activate() .
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Two time stamp precisions are supported, microseconds and nanoseconds. One can
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use options
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.B PCAP_TSTAMP_PRECISION_MICRO and
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.B PCAP_TSTAMP_PRECISION_NANO
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to request desired precision. By default, time stamps are in microseconds.
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.SH RETURN VALUE
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.B pcap_set_tstamp_precision()
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returns 0 on success if the specified time stamp precision is expected to be
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supported by the operating system,
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.B PCAP_ERROR_TSTAMP_PRECISION_NOTSUP
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if operating system does not support requested time stamp precision,
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.B PCAP_ERROR_ACTIVATED
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if called on a capture handle that has been activated.
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.SH SEE ALSO
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pcap(3PCAP),
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pcap_get_tstamp_precision(3PCAP),
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pcap-tstamp(@MAN_MISC_INFO@)
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