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head/sys/netinet/tcp_output.c
| Show First 20 Lines • Show All 585 Lines • ▼ Show 20 Lines | #endif | ||||
| * - we have more then 1/2 the maximum send window's worth of | * - we have more then 1/2 the maximum send window's worth of | ||||
| * data (receiver may be limited the window size) | * data (receiver may be limited the window size) | ||||
| * - we need to retransmit | * - we need to retransmit | ||||
| */ | */ | ||||
| if (len) { | if (len) { | ||||
| if (len >= tp->t_maxseg) | if (len >= tp->t_maxseg) | ||||
| goto send; | goto send; | ||||
| /* | /* | ||||
| * As the TCP header options are now | |||||
| * considered when setting up the initial | |||||
| * window, we would not send the last segment | |||||
| * if we skip considering the option length here. | |||||
| * Note: this may not work when tcp headers change | |||||
| * very dynamically in the future. | |||||
| */ | |||||
| if ((((tp->t_flags & TF_SIGNATURE) ? | |||||
| PADTCPOLEN(TCPOLEN_SIGNATURE) : 0) + | |||||
| ((tp->t_flags & TF_RCVD_TSTMP) ? | |||||
| PADTCPOLEN(TCPOLEN_TIMESTAMP) : 0) + | |||||
| len) >= tp->t_maxseg) | |||||
| goto send; | |||||
| /* | |||||
| * NOTE! on localhost connections an 'ack' from the remote | * NOTE! on localhost connections an 'ack' from the remote | ||||
| * end may occur synchronously with the output and cause | * end may occur synchronously with the output and cause | ||||
| * us to flush a buffer queued with moretocome. XXX | * us to flush a buffer queued with moretocome. XXX | ||||
| * | * | ||||
| * note: the len + off check is almost certainly unnecessary. | * note: the len + off check is almost certainly unnecessary. | ||||
| */ | */ | ||||
| if (!(tp->t_flags & TF_MORETOCOME) && /* normal case */ | if (!(tp->t_flags & TF_MORETOCOME) && /* normal case */ | ||||
| (idle || (tp->t_flags & TF_NODELAY)) && | (idle || (tp->t_flags & TF_NODELAY)) && | ||||
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