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sys/netinet/tcp_syncache.c
| Show First 20 Lines • Show All 1,811 Lines • ▼ Show 20 Lines | syncache_respond(struct syncache *sc, const struct mbuf *m0, int flags) | ||||
| struct tcphdr *th = NULL; | struct tcphdr *th = NULL; | ||||
| struct udphdr *udp = NULL; | struct udphdr *udp = NULL; | ||||
| int optlen, error = 0; /* Make compiler happy */ | int optlen, error = 0; /* Make compiler happy */ | ||||
| u_int16_t hlen, tlen, mssopt, ulen; | u_int16_t hlen, tlen, mssopt, ulen; | ||||
| struct tcpopt to; | struct tcpopt to; | ||||
| #ifdef INET6 | #ifdef INET6 | ||||
| struct ip6_hdr *ip6 = NULL; | struct ip6_hdr *ip6 = NULL; | ||||
| #endif | #endif | ||||
| struct accecn ae; | |||||
| NET_EPOCH_ASSERT(); | NET_EPOCH_ASSERT(); | ||||
| hlen = | hlen = | ||||
| #ifdef INET6 | #ifdef INET6 | ||||
| (sc->sc_inc.inc_flags & INC_ISIPV6) ? sizeof(struct ip6_hdr) : | (sc->sc_inc.inc_flags & INC_ISIPV6) ? sizeof(struct ip6_hdr) : | ||||
| #endif | #endif | ||||
| sizeof(struct ip); | sizeof(struct ip); | ||||
| ▲ Show 20 Lines • Show All 123 Lines • ▼ Show 20 Lines | |||||
| #endif | #endif | ||||
| if (sc->sc_tfo_cookie) { | if (sc->sc_tfo_cookie) { | ||||
| to.to_flags |= TOF_FASTOPEN; | to.to_flags |= TOF_FASTOPEN; | ||||
| to.to_tfo_len = TCP_FASTOPEN_COOKIE_LEN; | to.to_tfo_len = TCP_FASTOPEN_COOKIE_LEN; | ||||
| to.to_tfo_cookie = sc->sc_tfo_cookie; | to.to_tfo_cookie = sc->sc_tfo_cookie; | ||||
| /* don't send cookie again when retransmitting response */ | /* don't send cookie again when retransmitting response */ | ||||
| sc->sc_tfo_cookie = NULL; | sc->sc_tfo_cookie = NULL; | ||||
| } | } | ||||
| if (V_tcp_ecn_option) | |||||
| to.to_flags |= TOF_ACCE_SYN; | |||||
| } | |||||
| if (V_tcp_ecn_option && | |||||
| (sc->sc_flags & SCF_ECN_MASK) && | |||||
| ((sc->sc_flags & SCF_ECN_MASK) != SCF_ECN)) { | |||||
| to.to_flags |= TOF_ACCECNOPT; | |||||
| to.to_flags |= TOF_ACCE_E0 | | |||||
| TOF_ACCE_E1 | | |||||
| TOF_ACCE_CE; | |||||
| ae.re0b = 1; | |||||
| ae.re1b = 1; | |||||
| ae.rceb = 0; | |||||
| to.to_ae = &ae; | |||||
| } | } | ||||
| if (sc->sc_flags & SCF_TIMESTAMP) { | if (sc->sc_flags & SCF_TIMESTAMP) { | ||||
| to.to_tsval = sc->sc_tsoff + tcp_ts_getticks(); | to.to_tsval = sc->sc_tsoff + tcp_ts_getticks(); | ||||
| to.to_tsecr = sc->sc_tsreflect; | to.to_tsecr = sc->sc_tsreflect; | ||||
| to.to_flags |= TOF_TS; | to.to_flags |= TOF_TS; | ||||
| } | } | ||||
| optlen = tcp_addoptions(&to, (u_char *)(th + 1)); | optlen = tcp_addoptions(&to, (u_char *)(th + 1)); | ||||
| ▲ Show 20 Lines • Show All 616 Lines • Show Last 20 Lines | |||||