NAME

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

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);

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(), pcap_dump(), and pcap_dump_close()  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().

SEE ALSO

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

                                                   1 July 2013                             PCAP_OPEN_DEAD(3PCAP)