pcap_dump_open, pcap_dump_fopen - open a file to which to write packets
pcap_dumper_t *pcap_dump_open(pcap_t *p, const char *fname);
pcap_dumper_t *pcap_dump_fopen(pcap_t *p, FILE *fp);
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(8) 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 snap-
shot length from p are used as the link-layer type and snapshot length of the output file.
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.
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)
5 April 2008 PCAP_DUMP_OPEN(3)