PCAP_MAJOR_VERSION(3)  FreeBSD Library Functions Manual  PCAP_MAJOR_VERSION(3)

NAME
       pcap_major_version, pcap_minor_version - get the version number of a
       savefile

SYNOPSIS
       #include <pcap/pcap.h>

       int pcap_major_version(pcap_t *p);
       int pcap_minor_version(pcap_t *p);

DESCRIPTION
       If p refers to a ``savefile'', pcap_major_version() returns the major
       number of the file format of the ``savefile'' and pcap_minor_version()
       returns the minor number of the file format of the ``savefile''.  The
       version number is stored in the ``savefile''; note that the meaning of
       its values depends on the type of ``savefile'' (for example, pcap or
       pcapng).

       If p refers to a live capture, the values returned by
       pcap_major_version() and pcap_minor_version() are not meaningful.

SEE ALSO
       pcap(3)

                                8 January 2018           PCAP_MAJOR_VERSION(3)