diff options
| -rw-r--r-- | lib/libtle_l4p/tcp_rxtx.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/lib/libtle_l4p/tcp_rxtx.c b/lib/libtle_l4p/tcp_rxtx.c index c0a0dd1..e785b9a 100644 --- a/lib/libtle_l4p/tcp_rxtx.c +++ b/lib/libtle_l4p/tcp_rxtx.c @@ -1554,9 +1554,15 @@ rx_synack(struct tle_tcp_stream *s, uint32_t ts, uint32_t state, if (state != TCP_ST_SYN_SENT) return -EINVAL; - /* invalid SEG.SEQ */ + /* + * RFC 793 3.9: in the SYN-SENT state + * If SEG.ACK =< ISS, or SEG.ACK > SND.NXT, send a reset + * <SEQ=SEG.ACK><CTL=RST> + * and discard the segment. + * The connection remains in the same state. + */ if (si->ack != (uint32_t)s->tcb.snd.nxt) { - rsp->flags = TCP_FLAG_RST; + send_rst(s, si->ack); return 0; } @@ -1711,10 +1717,7 @@ rx_stream(struct tle_tcp_stream *s, uint32_t ts, i = 0; /* we have a response packet to send. */ - if (rsp.flags == TCP_FLAG_RST) { - send_rst(s, si[i].ack); - stream_term(s); - } else if (rsp.flags != 0) { + if (rsp.flags != 0) { send_ack(s, ts, rsp.flags); /* start the timer for FIN packet */ @@ -2590,7 +2593,7 @@ rto_stream(struct tle_tcp_stream *s, uint32_t tms) timer_restart(s); } else { - send_rst(s, s->tcb.snd.una); + send_rst(s, s->tcb.snd.nxt); stream_term(s); } } |