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NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | COLOPHON |
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PCAP_OPEN_DEAD(3PCAP) PCAP_OPEN_DEAD(3PCAP)
pcap_open_dead, pcap_open_dead_with_tstamp_precision - open a fake
pcap_t for compiling filters or opening a capture for output
#include <pcap/pcap.h>
pcap_t *pcap_open_dead(int linktype, int snaplen);
pcap_t *pcap_open_dead_with_tstamp_precision(int linktype, int snaplen,
u_int precision);
pcap_open_dead() and pcap_open_dead_with_tstamp_precision() are used
for creating a pcap_t structure to use when calling the other
functions in libpcap. It is typically used when just using libpcap
for compiling BPF code; it can also be used if using
pcap_dump_open(), pcap_dump(), and pcap_dump_close() to write a
savefile if there is no pcap_t that supplies the packets to be
written.
linktype specifies the link-layer type for the pcap_t.
snaplen specifies the snapshot length for the pcap_t.
When pcap_open_dead_with_tstamp_precision(), is used to create a
pcap_t for use with pcap_dump_open(), precision specifies the time
stamp precision for packets; PCAP_TSTAMP_PRECISION_MICRO should be
specified if the packets to be written have time stamps in seconds
and microseconds, and PCAP_TSTAMP_PRECISION_NANO should be specified
if the packets to be written have time stamps in seconds and
nanoseconds. Its value does not affect pcap_compile().
pcap(3PCAP), pcap_compile(3PCAP), pcap_dump_open(3PCAP),
pcap-linktype(7)
This page is part of the libpcap (packet capture library) project.
Information about the project can be found at
⟨http://www.tcpdump.org/⟩. If you have a bug report for this manual
page, see ⟨http://www.tcpdump.org/#patches⟩. This page was obtained
from the project's upstream Git repository
⟨https://github.com/the-tcpdump-group/libpcap.git⟩ on 2018-02-02.
(At that time, the date of the most recent commit that was found in
the repository was 2018-01-31.) If you discover any rendering prob‐
lems in this HTML version of the page, or you believe there is a bet‐
ter or more up-to-date source for the page, or you have corrections
or improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to man-pages@man7.org
3 January 2014 PCAP_OPEN_DEAD(3PCAP)
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