pcap_dump_open(3pcap) [mojave man page]

PCAP_DUMP_OPEN(3PCAP)													     PCAP_DUMP_OPEN(3PCAP)

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  snap-
       shot 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@)

								 16 February 2015					     PCAP_DUMP_OPEN(3PCAP)

PCAP_INJECT(3PCAP)														PCAP_INJECT(3PCAP)

NAME

       pcap_inject, pcap_sendpacket - transmit a packet

SYNOPSIS

       #include <pcap/pcap.h>

       int pcap_inject(pcap_t *p, const void *buf, size_t size);
       int pcap_sendpacket(pcap_t *p, const u_char *buf, int size);

DESCRIPTION

       pcap_inject()  sends a raw packet through the network interface; buf points to the data of the packet, including the link-layer header, and
       size is the number of bytes in the packet.

       Note that, even if you successfully open the network interface, you might not have permission to send packets on it, or it might  not  sup-
       port sending packets; as pcap_open_live() doesn't have a flag to indicate whether to open for capturing, sending, or capturing and sending,
       you cannot request an open that supports sending and be notified at open time whether sending  will  be	possible.   Note  also	that  some
       devices might not support sending packets.

       Note  that, on some platforms, the link-layer header of the packet that's sent might not be the same as the link-layer header of the packet
       supplied to pcap_inject(), as the source link-layer address, if the header contains such an address, might be changed  to  be  the  address
       assigned  to the interface on which the packet it sent, if the platform doesn't support sending completely raw and unchanged packets.  Even
       worse, some drivers on some platforms might change the link-layer type field to whatever value libpcap used when attaching to  the  device,
       even on platforms that do nominally support sending completely raw and unchanged packets.

       pcap_sendpacket()  is  like  pcap_inject(), but it returns 0 on success, rather than returning the number of bytes written.  (pcap_inject()
       comes from OpenBSD; pcap_sendpacket() comes from WinPcap.  Both are provided for compatibility.)

RETURN VALUE

       pcap_inject() returns the number of bytes written on success and -1 on failure.

       pcap_sendpacket() returns 0 on success and -1 on failure.

       If -1 is returned, pcap_geterr() or pcap_perror() may be called with p as an argument to fetch or display the error text.

SEE ALSO

       pcap(3PCAP), pcap_geterr(3PCAP)

								  3 January 2014						PCAP_INJECT(3PCAP)