Hi All,
I've just published raw-socket 1.1.8 to npm.
In this version the "Automatic Checksum Generation" feature has been
removed and replaced with two functions, createChecksum() and
writeChecksum().
These two functions provide greater control over checksum generation. They
provides the ability to create 16 bit checksums (as required by
IP(v6)/TCP/UCP, etc.) from multiple Node.js Buffer objects (think TCP/UDP
and psuedo IP headers) and to write the generated checksum to a Node.js
Buffer object.
In previous code one would specify automatic checksum generation when
creating a raw socket:
var socket = raw.createSocket ({generateChecksums: true, ...});
With the new interface you would create and write your own checksums as and
when you create packets:
// ICMP checksums are at offset 2 and 3, i.e. bytes 3 and 4
var icmp_packet = new Buffer ([...]);
raw.writeChecksum (icmp_packet, 2, raw.createChecksum (icmp_packet));
This change does break existing code - hence this announcement - but the
newer interface is much cleaner and (in my opinion) de-coupled, and I
wanted to remove the old interface for some time now.
The net-ping module has been updated to use this new interface.
Recently the htonl(), htons(), ntohl() and ntohs() functions were also
added to raw-socket, to expose functions with the same name for your
operating system, I thought this was a natural addition given then when
dealing with this module you typically need to manipulate buffers to
produce data in network byte order.
Thanks
Steve
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