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- It's worthwhile to use untimeout(9), even though we must still protect
against "false" timeouts, because most of the time it saves having to
handle a dummy timeout event.
- Slight tweaks to the delayed ACK algorithm paramters.
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- Fix slowness when operating over fast connections, where the timeout(9)
granularity is on the same order of magnitude as the round trip time.
timeout(9) can happen up to 1 tick early, which was causing receive
ack timeouts to happen too early, causing bogus "lost" packets.
- Increase the local time counter to 64 bits to avoid roll-over.
- Keep statistics on memory allocation failures.
- Add a new option to always include the ack when sending data packets.
Might be useful in high packet loss situations. Might not.
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instead of bumping the recvAck counter by one, pretend that
all outstanding xmit packets are acknowleged, and restart
transmitting anew, with an empty (but halved) transmit window.
Put a lower bound on the adaptive timeout value.
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world seems to interpret the spec this way
- Initialize transmit window to two instead of one; helps get things
going initially when the first packet may get dropped
- Really fix the shutdown + timeout race condition this time
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- Properly handle 32 bit sequence numbers when they wrap around
- Don't drop GRE packets with stale ACK numbers, just ignore the ACK
- Close race between node being shutdown and timer going off
Also add support for lots of statistics, and control message ASCIIfication
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to support future work in flow-control and 'packet reject/replace'
processing modes.
reviewed by: phk, archie
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Remove ~60 unneeded #include <sys/malloc.h>
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for the PPTP protocol as specified in RFC 2637.
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