pcap_open_dead(3) - NetBSD Manual Pages

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PCAP_OPEN_DEAD(3)                                            PCAP_OPEN_DEAD(3)




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(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).


SEE ALSO

       pcap(3), pcap-linktype(7)



                                3 January 2014               PCAP_OPEN_DEAD(3)