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pcap_open_dead

PCAP_OPEN_DEAD(3PCAP)													     PCAP_OPEN_DEAD(3PCAP)

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 func-
       tions 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)

								  3 January 2014					     PCAP_OPEN_DEAD(3PCAP)