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sys/netinet/tcp_stacks/rack.c
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| Show First 20 Lines • Show All 13,429 Lines • ▼ Show 20 Lines | if (tp->t_rxtshift >= 1) { | ||||
| flags |= TH_ECE | TH_CWR; | flags |= TH_ECE | TH_CWR; | ||||
| } | } | ||||
| /* Handle parallel SYN for ECN */ | /* Handle parallel SYN for ECN */ | ||||
| if ((tp->t_state == TCPS_SYN_RECEIVED) && | if ((tp->t_state == TCPS_SYN_RECEIVED) && | ||||
| (tp->t_flags2 & TF2_ECN_SND_ECE)) { | (tp->t_flags2 & TF2_ECN_SND_ECE)) { | ||||
| flags |= TH_ECE; | flags |= TH_ECE; | ||||
| tp->t_flags2 &= ~TF2_ECN_SND_ECE; | tp->t_flags2 &= ~TF2_ECN_SND_ECE; | ||||
| } | } | ||||
| if (tp->t_state == TCPS_ESTABLISHED && | if ((tp->t_state == TCPS_ESTABLISHED && | ||||
| (tp->t_flags2 & TF2_ECN_PERMIT)) { | (tp->t_flags2 & TF2_ECN_PERMIT)) || | ||||
| ((tp->t_state > TCPS_ESTABLISHED) && | |||||
| (tp->t_flags2 & TF2_ECN_PERMIT) && | |||||
| V_tcp_ecn_generalized) || | |||||
| /* | /* | ||||
| * Note that a passive open SYN,ACK | |||||
| * is actually sent from tcp_syncache | |||||
| */ | |||||
| (((flags & (TH_SYN|TH_ACK)) == (TH_SYN)) && | |||||
| ((flags & (TH_ECE|TH_CWR)) == (TH_ECE|TH_CWR)) && | |||||
| V_tcp_ecn_generalized) || | |||||
| (((flags & (TH_SYN|TH_ACK)) == (TH_SYN|TH_ACK)) && | |||||
| (flags & (TH_CWR|TH_ECE)) && | |||||
| V_tcp_ecn_generalized)) { | |||||
| /* | |||||
| * If the peer has ECN, mark data packets with ECN capable | * If the peer has ECN, mark data packets with ECN capable | ||||
| * transmission (ECT). Ignore pure ack packets, | * transmission (ECT). Ignore pure ack packets, | ||||
| * retransmissions. | * retransmissions unless doing generalized ECN. | ||||
| */ | */ | ||||
| if (len > 0 && SEQ_GEQ(tp->snd_nxt, tp->snd_max) && | if (V_tcp_ecn_generalized || | ||||
| (sack_rxmit == 0)) { | ((len > 0 && SEQ_GEQ(tp->snd_nxt, tp->snd_max) && | ||||
| (sack_rxmit == 0)))) { | |||||
| #ifdef INET6 | #ifdef INET6 | ||||
| if (isipv6) | if (isipv6) | ||||
| ip6->ip6_flow |= htonl(IPTOS_ECN_ECT0 << 20); | ip6->ip6_flow |= htonl(IPTOS_ECN_ECT0 << 20); | ||||
| else | else | ||||
| #endif | #endif | ||||
| ip->ip_tos |= IPTOS_ECN_ECT0; | ip->ip_tos |= IPTOS_ECN_ECT0; | ||||
| KMOD_TCPSTAT_INC(tcps_ecn_ect0); | KMOD_TCPSTAT_INC(tcps_ecn_ect0); | ||||
| /* | /* | ||||
| * Reply with proper ECN notifications. | * Reply with proper ECN notifications. | ||||
| * Only set CWR on new data segments. | * Only set CWR on new data segments. | ||||
| */ | */ | ||||
| if (tp->t_flags2 & TF2_ECN_SND_CWR) { | if ((tp->t_flags2 & TF2_ECN_SND_CWR) && | ||||
| (len > 0 && SEQ_GEQ(tp->snd_nxt, tp->snd_max) && | |||||
| (sack_rxmit == 0))) { | |||||
| flags |= TH_CWR; | flags |= TH_CWR; | ||||
| tp->t_flags2 &= ~TF2_ECN_SND_CWR; | tp->t_flags2 &= ~TF2_ECN_SND_CWR; | ||||
| } | } | ||||
| } | } | ||||
| if (tp->t_flags2 & TF2_ECN_SND_ECE) | if (tp->t_flags2 & TF2_ECN_SND_ECE) | ||||
| flags |= TH_ECE; | flags |= TH_ECE; | ||||
| } | } | ||||
| /* | /* | ||||
| ▲ Show 20 Lines • Show All 1,512 Lines • Show Last 20 Lines | |||||