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PCAP_LIST_DATALINKS(3PCAP)                                                        PCAP_LIST_DATALINKS(3PCAP)



NAME
       pcap_list_datalinks,  pcap_free_datalinks - get a list of link-layer header types supported by a cap-ture capture
       ture 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.

RETURN VALUE
       pcap_list_datalinks() returns the number of link-layer header 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_datalink_val_to_name(3PCAP), pcap-linktype(7)



                                               22 August 2010                     PCAP_LIST_DATALINKS(3PCAP)