Manpage of PCAP_LIST_DATALINKS

Section: Misc. Reference Manual Pages (3PCAP)
Updated: 8 March 2015
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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 (-1) 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

pcap(3PCAP), pcap_datalink_val_to_name(3PCAP), pcap-linktype(7)


This document was created by man2html, using the manual pages from "The Tcpdump Group" git repositories.
Time: 09:49:42 GMT, July 19, 2018