74 lines
2.6 KiB
Plaintext
74 lines
2.6 KiB
Plaintext
.\" Copyright (c) 1994, 1996, 1997
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that: (1) source code distributions
|
|
.\" retain the above copyright notice and this paragraph in its entirety, (2)
|
|
.\" distributions including binary code include the above copyright notice and
|
|
.\" this paragraph in its entirety in the documentation or other materials
|
|
.\" provided with the distribution, and (3) all advertising materials mentioning
|
|
.\" features or use of this software display the following acknowledgement:
|
|
.\" ``This product includes software developed by the University of California,
|
|
.\" Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
|
|
.\" the University nor the names of its contributors may be used to endorse
|
|
.\" or promote products derived from this software without specific prior
|
|
.\" written permission.
|
|
.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
|
|
.\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
|
|
.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
.\"
|
|
.TH PCAP_LIST_DATALINKS 3PCAP "25 July 2018"
|
|
.SH NAME
|
|
pcap_list_datalinks, pcap_free_datalinks \- get a list of link-layer header
|
|
types supported by a capture device, and free that list
|
|
.SH SYNOPSIS
|
|
.nf
|
|
.ft B
|
|
#include <pcap/pcap.h>
|
|
.ft
|
|
.LP
|
|
.ft B
|
|
int pcap_list_datalinks(pcap_t *p, int **dlt_buf);
|
|
void pcap_free_datalinks(int *dlt_list);
|
|
.ft
|
|
.fi
|
|
.SH DESCRIPTION
|
|
.BR pcap_list_datalinks ()
|
|
is used to get a list of the supported link-layer header types of the
|
|
interface associated with the pcap descriptor.
|
|
.BR pcap_list_datalinks ()
|
|
allocates an array to hold the list and sets
|
|
.IR *dlt_buf
|
|
to point to that array.
|
|
.LP
|
|
The caller is responsible for freeing the array with
|
|
.BR pcap_free_datalinks (),
|
|
which frees the list of link-layer header types pointed to by
|
|
.IR dlt_list .
|
|
.LP
|
|
It must not be called on a pcap descriptor created by
|
|
.BR \%pcap_create (3PCAP)
|
|
that has not yet been activated by
|
|
.BR \%pcap_activate (3PCAP).
|
|
.SH RETURN VALUE
|
|
.BR pcap_list_datalinks ()
|
|
returns the number of link-layer header types in the array on success,
|
|
.B PCAP_ERROR_NOT_ACTIVATED
|
|
if called on a capture handle that has been created but not activated,
|
|
and
|
|
.B PCAP_ERROR
|
|
on other errors.
|
|
If
|
|
.B PCAP_ERROR
|
|
is returned,
|
|
.BR pcap_geterr (3PCAP)
|
|
or
|
|
.BR \%pcap_perror (3PCAP)
|
|
may be called with
|
|
.I p
|
|
as an argument to fetch or display the error text.
|
|
.SH SEE ALSO
|
|
.BR pcap (3PCAP),
|
|
.BR pcap_datalink_val_to_name (3PCAP),
|
|
.BR pcap-linktype (@MAN_MISC_INFO@)
|