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
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().
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 2017-04-25. 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 firstname.lastname@example.org
3 January 2014 PCAP_OPEN_DEAD(3PCAP)