xref: /freebsd/contrib/libpcap/pcap_list_datalinks.3pcap.in (revision bb15ca603fa442c72dde3f3cb8b46db6970e3950)
@(#) $Header: /tcpdump/master/libpcap/pcap_list_datalinks.3pcap.in,v 1.1 2008-10-21 07:33:02 guy Exp $

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PCAP_LIST_DATALINKS 3PCAP "5 April 2008"
NAME
pcap_list_datalinks - get a list of link-layer header types supported by a capture device
SYNOPSIS
#include <pcap/pcap.h>

int pcap_list_datalinks(pcap_t *p, int **dlt_buf);

DESCRIPTION
pcap_list_datalinks() is used to get a list of the supported data link types of the interface associated with the pcap descriptor. pcap_list_datalinks() allocates an array to hold the list and sets *dlt_buf . The caller is responsible for freeing the array with pcap_free_datalinks (3PCAP).
RETURN VALUE
pcap_list_datalinks() returns the number of data link types in the array 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), pcap_free_datalinks(3PCAP), pcap-linktype(@MAN_MISC_INFO@)