pcap_dump_open(3) pcap_dump_open(3)
NAME
pcap_dump_open, pcap_dump_fopen - open a file to which to write packets
SYNOPSIS
#include <pcap/pcap.h>
pcap_dump_open(3) *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(3) 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; this stream will be closed by a subsequent call to
pcap_dump_close(). 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(3), pcap_create(3), pcap_activate(3),
pcap_open_offline(3), pcap_open_live(3), pcap_open_dead(3),
pcap_dump(3), pcap_dump_close(3), pcap_geterr(3),
pcap-savefile(5)
22 June 2018 pcap_dump_open(3)
libpcap 1.9.0 - Generated Sat Jul 28 16:14:01 CDT 2018