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sys/netinet/tcp_syncache.c
| Show First 20 Lines • Show All 508 Lines • ▼ Show 20 Lines | TAILQ_FOREACH_SAFE(sc, &sch->sch_bucket, sc_hash, nsc) { | ||||
| * host does the SYN/ACK->ACK. | * host does the SYN/ACK->ACK. | ||||
| */ | */ | ||||
| if (TSTMP_GT(sc->sc_rxttime, tick)) { | if (TSTMP_GT(sc->sc_rxttime, tick)) { | ||||
| if (TSTMP_LT(sc->sc_rxttime, sch->sch_nextc)) | if (TSTMP_LT(sc->sc_rxttime, sch->sch_nextc)) | ||||
| sch->sch_nextc = sc->sc_rxttime; | sch->sch_nextc = sc->sc_rxttime; | ||||
| continue; | continue; | ||||
| } | } | ||||
| if (sc->sc_rxmits > V_tcp_ecn_maxretries) { | if (sc->sc_rxmits > V_tcp_ecn_maxretries) { | ||||
| sc->sc_flags &= ~SCF_ECN; | sc->sc_flags &= ~SCF_ECN_MASK; | ||||
| } | } | ||||
| if (sc->sc_rxmits > V_tcp_syncache.rexmt_limit) { | if (sc->sc_rxmits > V_tcp_syncache.rexmt_limit) { | ||||
| if ((s = tcp_log_addrs(&sc->sc_inc, NULL, NULL, NULL))) { | if ((s = tcp_log_addrs(&sc->sc_inc, NULL, NULL, NULL))) { | ||||
| log(LOG_DEBUG, "%s; %s: Retransmits exhausted, " | log(LOG_DEBUG, "%s; %s: Retransmits exhausted, " | ||||
| "giving up and removing syncache entry\n", | "giving up and removing syncache entry\n", | ||||
| s, __func__); | s, __func__); | ||||
| free(s, M_TCPLOG); | free(s, M_TCPLOG); | ||||
| } | } | ||||
| ▲ Show 20 Lines • Show All 1,033 Lines • ▼ Show 20 Lines | if (sc != NULL) { | ||||
| /* | /* | ||||
| * Update timestamp if present. | * Update timestamp if present. | ||||
| */ | */ | ||||
| if ((sc->sc_flags & SCF_TIMESTAMP) && (to->to_flags & TOF_TS)) | if ((sc->sc_flags & SCF_TIMESTAMP) && (to->to_flags & TOF_TS)) | ||||
| sc->sc_tsreflect = to->to_tsval; | sc->sc_tsreflect = to->to_tsval; | ||||
| else | else | ||||
| sc->sc_flags &= ~SCF_TIMESTAMP; | sc->sc_flags &= ~SCF_TIMESTAMP; | ||||
| /* | /* | ||||
| * Disable ECN if needed. | * Adjust ECN response if needed, e.g. different | ||||
| * IP ECN field, or a fallback by the remote host. | |||||
| */ | */ | ||||
| if ((sc->sc_flags & SCF_ECN) && | if (sc->sc_flags & SCF_ECN_MASK) { | ||||
| ((tcp_get_flags(th) & (TH_ECE|TH_CWR)) != (TH_ECE|TH_CWR))) { | sc->sc_flags &= ~SCF_ECN_MASK; | ||||
| sc->sc_flags &= ~SCF_ECN; | sc->sc_flags = tcp_ecn_syncache_add(tcp_get_flags(th), iptos); | ||||
| } | } | ||||
| #ifdef MAC | #ifdef MAC | ||||
| /* | /* | ||||
| * Since we have already unconditionally allocated label | * Since we have already unconditionally allocated label | ||||
| * storage, free it up. The syncache entry will already | * storage, free it up. The syncache entry will already | ||||
| * have an initialized label we can use. | * have an initialized label we can use. | ||||
| */ | */ | ||||
| mac_syncache_destroy(&maclabel); | mac_syncache_destroy(&maclabel); | ||||
| ▲ Show 20 Lines • Show All 1,002 Lines • Show Last 20 Lines | |||||