4.3BSD release version

allow OOB data to be received in-line

watch out for persist state: don't set REXMT if persisting,
need to call output if we receive ack for all data (may need to persist then).

lint

half-open connection correction: ack SYN's not in the window;
turn on the "notyet" delay of tcp_output call if not needed

careful with sequence number arithmetic vs. window sizes
(u_long vs. int vs. u_short); don't lose mbufs on failure part thru new
connection setup from LISTEN; use tiflags consistently; add missing AC

careful with sequence number arithmetic vs. window sizes
(u_long vs. int vs. u_short); don't lose mbufs on failure part thru new
connection setup from LISTEN; use tiflags consistently; add missing ACKNOW
in LISTEN input case; don't use window if no ACK, as TAC's send garbage;
make input urgent pointer sensible so it compares right on first URG,
accounting for seq-number wraparound.

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tcp packet with options corrupts mbufs (from lcc.richard@locus.ucla.edu)

synchronize grot

maintain estimates of peer's send and receive buffer sizes;
don't wait for bigger window if he hasn't got one

don't respond to broadcasts

re-fix shrinking window problem, watching out for short vs. long
and rcv_adv not being initialized

do common case of tcpreass with macro, avoiding ins/dequeing;
avoid unnecessary pullups; reuse src routing on incoming SYN's;
don't poke in inpcb after freeing; don't retract offered window due
to mb

do common case of tcpreass with macro, avoiding ins/dequeing;
avoid unnecessary pullups; reuse src routing on incoming SYN's;
don't poke in inpcb after freeing; don't retract offered window due
to mbuf limit; fix timer for FIN_WAIT_2 blockage; only read oob data once

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minor cleanups

Add copyright

back out FIN_WAIT_2 timer hack; don't clear persist timer here

remove fix for acking window probes: don't ack acks!

add snd_cwndw to decrease outstanding data after a source quench;
accept a bit more urgent data; acknowledge window probes

put TCP_MSS in header

bind local address according to routing (caching the route);
pick maximum seg sizes (offered and accepted) based on interface mtu,
with default if not local

fix round-trip timing: rexmt timer shouldn't screw rtt up,
but careful when retransmitting timed segment

Include file changes. No more ../h

rearrange to cause reset if data arrives and user is gone

sbdrop decrements sb_cc, so must use val before call

4.2 distribution

don't be so offensive