pcap_list_datalinks(3PCAP) man page
Updated: 25 July 2018 • View in plain text •
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This man page documents libpcap version 1.11.0-PRE-GIT (see also: 1.10.4, 1.10.2, 1.10.1, 1.10.0, 1.9.1, 1.8.1, 1.7.4, 1.6.2, 1.5.3).
Your system may have a different version installed, possibly with some local modifications. To achieve the best results, please make sure this version of this man page suits your needs. If necessary, try to look for a different version on this web site or in the man pages available in your installation.NAME
pcap_list_datalinks, pcap_free_datalinks - get a list of link-layer header
types supported by a capture device, and free that list
SYNOPSIS
#include <pcap/pcap.h> int pcap_list_datalinks(pcap_t *p, int **dlt_buf); void pcap_free_datalinks(int *dlt_list);
DESCRIPTION
pcap_list_datalinks()
is used to get a list of the supported link-layer header types of the
interface associated with the pcap descriptor.
pcap_list_datalinks()
allocates an array to hold the list and sets
*dlt_buf
to point to that array.
The caller is responsible for freeing the array with pcap_free_datalinks(), which frees the list of link-layer header types pointed to by dlt_list.
It must not be called on a pcap descriptor created by pcap_create(3PCAP) that has not yet been activated by pcap_activate(3PCAP).
RETURN VALUE
pcap_list_datalinks()
returns the number of link-layer header types in the array on success,
PCAP_ERROR_NOT_ACTIVATED
if called on a capture handle that has been created but not activated,
and
PCAP_ERROR
on other errors.
If
PCAP_ERROR
is returned,
pcap_geterr(3PCAP)
or
pcap_perror(3PCAP)
may be called with
p
as an argument to fetch or display the error text.
SEE ALSO
COLOPHON
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