открыть поддельный pcap_t для компиляции фильтров или открытия захвата для вывода (open a fake pcap_t for compiling filters or opening a capture for output)
Имя (Name)
pcap_open_dead, pcap_open_dead_with_tstamp_precision - open a
fake pcap_t for compiling filters or opening a capture for output
Синопсис (Synopsis)
#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);
Описание (Description)
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).
Обратная совместимость (Backward compatibility)
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.
Смотри также (See also)
pcap(3PCAP), pcap-linktype(7)
