manpagez: man pages & more
man pcap_open_dead(3)
Home | html | info | man
pcap_open_dead(3)                                    pcap_open_dead(3)


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


       #include <pcap/pcap.h>

       pcap_open_dead(3) linktype, int snaplen);
       pcap_t *pcap_open_dead_with_tstamp_precision(int linktype, int snaplen,
           u_int precision);


       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(3),
       pcap_dump(3), and pcap_dump_close(3) 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  pre-
       cision  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(3).


       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


       pcap(3), pcap-linktype(7)

                                3 January 2014           pcap_open_dead(3)

libpcap 1.10.0 - Generated Thu Dec 31 09:21:02 CST 2020
© 2000-2024
Individual documents may contain additional copyright information.