have piece means that the piece passed hash check AND has been successfully written to disk

size = the packet size to remove from the receive buffer packet_size = the next packet size to receive in the buffer offset = the offset into the rece

returns protocol, auth, hostname, port, path

returns the size of the bitfield in bits.

high level multiplication (handles sign) */

swap the elements of two integers, for cases where you can't simply swap the * mp_int pointers around */

this is called once we have completely downloaded piece 'index', its hash has been verified. It's also called during initial file check when we find a

b = a/2 */

creates "a" then copies b into it */

compare a digit */

init an mp_init for a given size */

computes b = a*a */

this function is called every time the node sees a sign of a node being alive. This node will either be inserted in the k-buckets or be moved to the t

compare if lhs is less than rhs, taking wrapping into account. if lhs is close to UINT_MAX and rhs is close to 0, lhs is assumed to have wrapped and c

set to a digit */

this is called when a request is rejected or when a peer disconnects. The piece might be in any state