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Kieran Mansley - 14th July 2004

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* Fixed whitespace indenting in parts of tcp_in.c
 * Changed adjustment of ssthresh in response to fast retransmit
 * Commented out iteration of unsent list when new ACK received as we no longer put all unacked data on unsent list when retransmitting
This commit is contained in:
kieranm 2004-07-14 09:45:01 +00:00
parent 8d052ecf24
commit c356f560e8
1 changed files with 293 additions and 283 deletions
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14
src/core/tcp_in.c
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@ -709,9 +709,14 @@ tcp_receive(struct tcp_pcb *pcb)
ntohl(pcb->unacked->tcphdr->seqno))); ntohl(pcb->unacked->tcphdr->seqno)));
tcp_rexmit(pcb); tcp_rexmit(pcb);
/* Set ssthresh to max (FlightSize / 2, 2*SMSS) */ /* Set ssthresh to max (FlightSize / 2, 2*SMSS) */
pcb->ssthresh = LWIP_MAX((pcb->snd_max - /*pcb->ssthresh = LWIP_MAX((pcb->snd_max -
pcb->lastack) / 2, pcb->lastack) / 2,
2 * pcb->mss); 2 * pcb->mss);*/
/* Set ssthresh to half of the minimum of the currenct cwnd and the advertised window */
if(pcb->cwnd > pcb->snd_wnd)
pcb->ssthresh = pcb->snd_wnd / 2;
else
pcb->ssthresh = pcb->cwnd / 2;
pcb->cwnd = pcb->ssthresh + 3 * pcb->mss; pcb->cwnd = pcb->ssthresh + 3 * pcb->mss;
pcb->flags |= TF_INFR; pcb->flags |= TF_INFR;
@ -808,6 +813,10 @@ tcp_receive(struct tcp_pcb *pcb)
rationale is that lwIP puts all outstanding segments on the rationale is that lwIP puts all outstanding segments on the
->unsent list after a retransmission, so these segments may ->unsent list after a retransmission, so these segments may
in fact have been sent once. */ in fact have been sent once. */
/* KJM 13th July 2004
I don't think is is necessary as we no longer move all unacked
segments on the unsent queue when performing retransmit */
/*
while (pcb->unsent != NULL && while (pcb->unsent != NULL &&
TCP_SEQ_LEQ(ntohl(pcb->unsent->tcphdr->seqno) + TCP_TCPLEN(pcb->unsent), TCP_SEQ_LEQ(ntohl(pcb->unsent->tcphdr->seqno) + TCP_TCPLEN(pcb->unsent),
ackno) && ackno) &&
@ -832,6 +841,7 @@ tcp_receive(struct tcp_pcb *pcb)
pcb->snd_nxt = htonl(pcb->unsent->tcphdr->seqno); pcb->snd_nxt = htonl(pcb->unsent->tcphdr->seqno);
} }
} }
*/
/* End of ACK for new data processing. */ /* End of ACK for new data processing. */