NAME

       pcap_dump_open, pcap_dump_fopen - open a file to which to write packets

SYNOPSIS

       #include <pcap/pcap.h>

       pcap_dumper_t *pcap_dump_open(pcap_t *p, const char *fname);
       pcap_dumper_t *pcap_dump_fopen(pcap_t *p, FILE *fp);

DESCRIPTION

       pcap_dump_open()  is  called to open a ``savefile'' for writing.  fname specifies the name
       of the file to open. The file will have the same format as those used  by  tcpdump(1)  and
       tcpslice(1).  The name "-" in a synonym for stdout.

       pcap_dump_fopen()  is  called  to  write data to an existing open stream fp.  Note that on
       Windows, that stream should be opened in binary mode.

       p is a capture or ``savefile'' handle returned by an earlier  call  to  pcap_create()  and
       activated  by  an  earlier  call  to  pcap_activate(),  or  returned by an earlier call to
       pcap_open_offline(), pcap_open_live(),  or  pcap_open_dead().   The  link-layer  type  and
       snapshot  length  from p are used as the link-layer type and snapshot length of the output
       file.

RETURN VALUES

       A  pointer  to  a  pcap_dumper_t  structure  to  use   in   subsequent   pcap_dump()   and
       pcap_dump_close()  calls is returned on success.  NULL is returned on failure.  If NULL is
       returned, pcap_geterr(p) can be used to get the error text.

SEE ALSO

       pcap(3PCAP),    pcap_create(3PCAP),    pcap_activate(3PCAP),     pcap_open_offline(3PCAP),
       pcap_open_live(3PCAP),  pcap_open_dead(3PCAP),  pcap_dump(3PCAP),  pcap_dump_close(3PCAP),
       pcap_geterr(3PCAP), pcap-savefile(5)

                                           5 April 2008                     PCAP_DUMP_OPEN(3PCAP)