NAME

       pcap_open_offline,              pcap_open_offline_with_tstamp_precision,              pcap_fopen_offline,
       pcap_fopen_offline_with_tstamp_precision - open a saved capture file for reading

SYNOPSIS

       #include <pcap/pcap.h>

       char errbuf[PCAP_ERRBUF_SIZE];

       pcap_t *pcap_open_offline(const char *fname, char *errbuf);
       pcap_t *pcap_open_offline_with_tstamp_precision(const char *fname,
           u_int precision, char *errbuf);
       pcap_t *pcap_fopen_offline(FILE *fp, char *errbuf);
       pcap_t *pcap_fopen_offline_with_tstamp_precision(FILE *fp,
           u_int precision, char *errbuf);

DESCRIPTION

       pcap_open_offline() and pcap_open_offline_with_tstamp_precision() are called to open a  ``savefile''  for
       reading.

       fname  specifies  the  name  of  the file to open. The file can have the pcap file format as described in
       pcap-savefile(5), which is the file format used by, among other programs, tcpdump(1) and tcpslice(1),  or
       can  have the pcap-ng file format, although not all pcap-ng files can be read.  The name "-" is a synonym
       for stdin.

       pcap_open_offline_with_tstamp_precision() takes an additional  precision  argument  specifying  the  time
       stamp precision desired; if PCAP_TSTAMP_PRECISION_MICRO is specified, packet time stamps will be supplied
       in seconds and microseconds, and if PCAP_TSTAMP_PRECISION_NANO is specified, packet time stamps  will  be
       supplied  in  seconds  and nanoseconds.  If the time stamps in the file do not have the same precision as
       the requested precision, they will be scaled up or down as necessary before being supplied.

       Alternatively, you may call pcap_fopen_offline() or  pcap_fopen_offline_with_tstamp_precision()  to  read
       dumped  data  from  an  existing  open  stream  fp.   pcap_fopen_offline_with_tstamp_precision() takes an
       additional precision argument as described above.  Note that on Windows, that stream should be opened  in
       binary mode.

RETURN VALUE

       pcap_open_offline(),       pcap_open_offline_with_tstamp_precision(),      pcap_fopen_offline(),      and
       pcap_fopen_offline_with_tstamp_precision() return a pcap_t * on success and NULL on failure.  If NULL  is
       returned, errbuf is filled in with an appropriate error message.  errbuf is assumed to be able to hold at
       least PCAP_ERRBUF_SIZE chars.

SEE ALSO

       pcap(3PCAP), pcap-savefile(5)

                                                 3 January 2014                         PCAP_OPEN_OFFLINE(3PCAP)