Recent Commits to sniffit:master

Simplify in_cksum() and squelch one more warning.

sn_packets.c:66:32: warning: passing argument 1 of 'in_cksum' from
  incompatible pointer type [-Wincompatible-pointer-types]

Packet data comes as a sequence of bytes rather than 16-bit words, so
take is as bytes and reconstruct the words as necessary.  Also replace
host byte order pointer type casting with explicit network byte order in
the words.  Lose a few variables as well.  Drop "register" because it no
longer is necessary with modern compilers and it certainly has nothing
to do with endianness.  This function may have other problems, which
should be easier to see and to fix now.  Use unsigned char in a few
places to match the new prototype.

Use inet_ntop() to squelch two more warnings.

sn_interface.c:201:3: warning: assignment to 'unsigned char *' from
  incompatible pointer type '_32_bit *' {aka 'unsigned int *'}
  [-Wincompatible-pointer-types]
sn_interface.c:207:3: warning: assignment to 'unsigned char *' from
  incompatible pointer type '_32_bit *' {aka 'unsigned int *'}
  [-Wincompatible-pointer-types]

The code in mask_status() takes an IPv4 address in network byte order
and converts it to a string.  There is a standard library function for
that, so just use it.

Fixup minor issues in README.md.