PCAP_DUMP_OPEN
Section: Misc. Reference Manual Pages (3PCAP)
Updated: 16 February 2015
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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_open_append(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 "-" is 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 time stamp precision, link-layer type, and snapshot length from
p
are used as the link-layer type and snapshot length of the output file.
pcap_dump_open_append()
is like
pcap_dump_open
but does not create the file if it does not exist and, if it does
already exist, and is a pcap file with the same byte order as the host
opening the file, and has the same time stamp precision, link-layer
header type, and snapshot length as
p,
it will write new packets at the end of the 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)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUES
-
- SEE ALSO
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