pcap_list_datalinks(3) pcap_list_datalinks(3)
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>
pcap_list_datalinks(3) *p, int **dlt_buf);
void pcap_free_datalinks(int *dlt_list);
DESCRIPTION
pcap_list_datalinks(3) is used to get a list of the supported link-layer
header types of the interface associated with the pcap descriptor.
pcap_list_datalinks(3) 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()
that has not yet been activated by pcap_activate().
RETURN VALUE
pcap_list_datalinks(3) 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 (-1) on
other errors. If PCAP_ERROR is returned, pcap_geterr() or pcap_per-
ror() may be called with p as an argument to fetch or display the error
text.
SEE ALSO
pcap(3), pcap_geterr(3), pcap_datalink_val_to_name(3),
pcap-linktype(7)
17 September 2013 pcap_list_datalinks(3)
libpcap 1.7.2 - Generated Sat Mar 14 06:32:40 CDT 2015