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(3PCAP),
21       pcap_dump(3PCAP), and pcap_dump_close(3PCAP) to  write  a  savefile  if
22       there is no pcap_t that 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(3PCAP).
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BACKWARD COMPATIBILITY

37       The pcap_open_dead_with_tstamp_precision() function became available in
38       libpcap release 1.5.1.  In previous releases, there was no mechanism to
39       open  a  savefile  for  writing  with  time stamps given in seconds and
40       nanoseconds.
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SEE ALSO

43       pcap(3PCAP), pcap-linktype(7)
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47                                3 January 2014           PCAP_OPEN_DEAD(3PCAP)
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