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PCAP_OPEN_OFFLINE(3PCAP)                                                            PCAP_OPEN_OFFLINE(3PCAP)



NAME
       pcap_open_offline, pcap_fopen_offline - 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_fopen_offline(FILE *fp, char *errbuf);

DESCRIPTION
       pcap_open_offline() is 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  tcp-slice(1), tcpslice(1),
       slice(1),  or can have the pcap-ng file format, although not all pcap-ng files can be read.  The name
       "-" in a synonym for stdin.

       Alternatively, you may call pcap_fopen_offline() to read dumped data from an existing open stream fp.
       Note that on Windows, that stream should be opened in binary mode.

RETURN VALUE
       pcap_open_offline()  and  pcap_fopen_offline()  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@)



                                                5 April 2008                        PCAP_OPEN_OFFLINE(3PCAP)