pcap_geterr(3pcap) [mojave man page]

PCAP_GETERR(3PCAP)														PCAP_GETERR(3PCAP)

NAME

       pcap_geterr, pcap_perror - get or print libpcap error message text

SYNOPSIS

       #include <pcap/pcap.h>

       char *pcap_geterr(pcap_t *p);
       void pcap_perror(pcap_t *p, const char *prefix);

DESCRIPTION

       pcap_geterr()  returns  the  error  text pertaining to the last pcap library error.  NOTE: the pointer it returns will no longer point to a
       valid error message string after the pcap_t passed to it is closed; you must use or copy the string before closing the pcap_t.

       pcap_perror() prints the text of the last pcap library error on stderr, prefixed by prefix.

SEE ALSO

       pcap(3PCAP)

								  3 January 2014						PCAP_GETERR(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)