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
tcpslice(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)