pcap_set_datalink(3pcap) [plan9 man page]

PCAP_SET_DATALINK(3PCAP)												  PCAP_SET_DATALINK(3PCAP)

NAME

       pcap_set_datalink - set the link-layer header type to be used by a capture device

SYNOPSIS

       #include <pcap/pcap.h>

       int pcap_set_datalink(pcap_t *p, int dlt);

DESCRIPTION

       pcap_set_datalink() is used to set the current link-layer header type of the pcap descriptor to the type specified by dlt.

RETURN VALUE

       pcap_set_datalink()  returns  0 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_name_to_val(3PCAP)

								  22 August 2010					  PCAP_SET_DATALINK(3PCAP)

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 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.

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)