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   pcap_open_dead.3pcap    ( 3 )

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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

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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);

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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).

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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.

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Смотри также (See also)

pcap(3PCAP), pcap-linktype(7)

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