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sys/netinet/tcp_output.c
| Show First 20 Lines • Show All 1,149 Lines • ▼ Show 20 Lines | #endif | ||||
| if (tp->t_state == TCPS_SYN_SENT && V_tcp_do_ecn == 1) { | if (tp->t_state == TCPS_SYN_SENT && V_tcp_do_ecn == 1) { | ||||
| if (tp->t_rxtshift >= 1) { | if (tp->t_rxtshift >= 1) { | ||||
| if (tp->t_rxtshift <= V_tcp_ecn_maxretries) | if (tp->t_rxtshift <= V_tcp_ecn_maxretries) | ||||
| flags |= TH_ECE|TH_CWR; | flags |= TH_ECE|TH_CWR; | ||||
| } else | } else | ||||
| flags |= TH_ECE|TH_CWR; | flags |= TH_ECE|TH_CWR; | ||||
| } | } | ||||
| 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_plusplus == 2)) || | |||||
| /* | /* | ||||
| * 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_plusplus == 2)) || | |||||
| (((flags & (TH_SYN|TH_ACK)) == (TH_SYN|TH_ACK)) && | |||||
| (flags & (TH_CWR|TH_ECE)) && | |||||
| (V_tcp_ecn_plusplus))) { | |||||
| /* | |||||
| * If the peer has ECN, mark data packets with | * If the peer has ECN, mark data packets with | ||||
| * ECN capable transmission (ECT). | * ECN capable transmission (ECT). | ||||
| * Ignore pure ack packets, retransmissions and window probes. | * Ignore pure ack packets, retransmissions and window probes. | ||||
| */ | */ | ||||
| if (len > 0 && SEQ_GEQ(tp->snd_nxt, tp->snd_max) && | if ((V_tcp_ecn_plusplus == 2) || | ||||
| (V_tcp_ecn_plusplus && tp->t_state < TCPS_ESTABLISHED) || | |||||
| ((len > 0 && SEQ_GEQ(tp->snd_nxt, tp->snd_max) && | |||||
| (sack_rxmit == 0) && | (sack_rxmit == 0) && | ||||
| !((tp->t_flags & TF_FORCEDATA) && len == 1)) { | !((tp->t_flags & TF_FORCEDATA) && len == 1)))) { | ||||
| #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; | ||||
| TCPSTAT_INC(tcps_ecn_ect0); | TCPSTAT_INC(tcps_ecn_ect0); | ||||
| } | } | ||||
| ▲ Show 20 Lines • Show All 933 Lines • Show Last 20 Lines | |||||