1PCAP_OPEN_DEAD(3PCAP)                                    PCAP_OPEN_DEAD(3PCAP)
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NAME

6       pcap_open_dead,  pcap_open_dead_with_tstamp_precision  -  open  a  fake
7       pcap_t for compiling filters or opening a capture for output
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SYNOPSIS

10       #include <pcap/pcap.h>
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12       pcap_t *pcap_open_dead(int linktype, int snaplen);
13       pcap_t *pcap_open_dead_with_tstamp_precision(int linktype, int snaplen,
14           u_int precision);
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DESCRIPTION

17       pcap_open_dead() and  pcap_open_dead_with_tstamp_precision()  are  used
18       for creating a pcap_t structure to use when calling the other functions
19       in libpcap.  It is typically used when just using libpcap for compiling
20       BPF  code;  it can also be used if using pcap_dump_open(), pcap_dump(),
21       and pcap_dump_close() to write a savefile if there is  no  pcap_t  that
22       supplies the packets to be written.
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24       linktype specifies the link-layer type for the pcap_t.
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26       snaplen specifies the snapshot length for the pcap_t.
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28       When pcap_open_dead_with_tstamp_precision(), is used to create a pcap_t
29       for use with pcap_dump_open(), precision specifies the time stamp  pre‐
30       cision  for packets; PCAP_TSTAMP_PRECISION_MICRO should be specified if
31       the packets to be written have time stamps in seconds and microseconds,
32       and PCAP_TSTAMP_PRECISION_NANO should be specified if the packets to be
33       written have time stamps in seconds and nanoseconds.   Its  value  does
34       not affect pcap_compile().
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SEE ALSO

37       pcap(3PCAP),   pcap_compile(3PCAP),  pcap_dump_open(3PCAP),  pcap-link‐
38       type(7)
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42                                  1 July 2013            PCAP_OPEN_DEAD(3PCAP)
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