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NAME | SYNOPSIS | DESCRIPTION | BACKWARD COMPATIBILITY | 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(3PCAP), pcap_dump(3PCAP), and
pcap_dump_close(3PCAP) 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(3PCAP).
The pcap_open_dead_with_tstamp_precision() function became
available in libpcap release 1.5.1. In previous releases, there
was no mechanism to open a savefile for writing with time stamps
given in seconds and nanoseconds.
pcap(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 2024-06-14.
(At that time, the date of the most recent commit that was found
in the repository was 2024-06-04.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better 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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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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