diff --git a/sys/netinet/icmp_var.h b/sys/netinet/icmp_var.h --- a/sys/netinet/icmp_var.h +++ b/sys/netinet/icmp_var.h @@ -104,11 +104,10 @@ #define BANDLIM_ICMP_UNREACH 0 #define BANDLIM_ICMP_ECHO 1 #define BANDLIM_ICMP_TSTAMP 2 -#define BANDLIM_RST_CLOSEDPORT 3 /* No connection, and no listeners */ -#define BANDLIM_RST_OPENPORT 4 /* No connection, listener */ -#define BANDLIM_ICMP6_UNREACH 5 -#define BANDLIM_SCTP_OOTB 6 -#define BANDLIM_MAX 7 +#define BANDLIM_TCP_RST 3 +#define BANDLIM_ICMP6_UNREACH 4 +#define BANDLIM_SCTP_OOTB 5 +#define BANDLIM_MAX 6 #endif #endif diff --git a/sys/netinet/ip_icmp.c b/sys/netinet/ip_icmp.c --- a/sys/netinet/ip_icmp.c +++ b/sys/netinet/ip_icmp.c @@ -1097,8 +1097,7 @@ [BANDLIM_ICMP_UNREACH] = "icmp unreach", [BANDLIM_ICMP_ECHO] = "icmp ping", [BANDLIM_ICMP_TSTAMP] = "icmp tstamp", - [BANDLIM_RST_CLOSEDPORT] = "closed port RST", - [BANDLIM_RST_OPENPORT] = "open port RST", + [BANDLIM_TCP_RST] = "tcp reset", [BANDLIM_ICMP6_UNREACH] = "icmp6 unreach", [BANDLIM_SCTP_OOTB] = "sctp ootb", }; diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c --- a/sys/netinet/tcp_input.c +++ b/sys/netinet/tcp_input.c @@ -621,6 +621,7 @@ #endif /* INET6 */ struct tcpopt to; /* options in this segment */ char *s = NULL; /* address and port logging */ + bool closed_port = false; /* segment is hitting a closed port */ NET_EPOCH_ASSERT(); @@ -907,7 +908,8 @@ log(LOG_INFO, "%s; %s: Connection attempt " "to closed port\n", s, __func__); } - rstreason = BANDLIM_RST_CLOSEDPORT; + rstreason = BANDLIM_TCP_RST; + closed_port = true; goto dropwithreset; } INP_LOCK_ASSERT(inp); @@ -998,12 +1000,14 @@ * down or it is in the CLOSED state. Either way we drop the * segment and send an appropriate response. */ - rstreason = BANDLIM_RST_CLOSEDPORT; + rstreason = BANDLIM_TCP_RST; + closed_port = true; goto dropwithreset; } if ((tp->t_port != port) && (tp->t_state > TCPS_LISTEN)) { - rstreason = BANDLIM_RST_CLOSEDPORT; + rstreason = BANDLIM_TCP_RST; + closed_port = true; goto dropwithreset; } @@ -1094,7 +1098,7 @@ * of the failure cause. */ INP_WUNLOCK(inp); - rstreason = BANDLIM_RST_OPENPORT; + rstreason = BANDLIM_TCP_RST; lookupflag &= ~INPLOOKUP_WILDCARD; goto findpcb; } @@ -1185,7 +1189,7 @@ s, __func__); syncache_badack(&inc, port); /* XXX: Not needed! */ TCPSTAT_INC(tcps_badsyn); - rstreason = BANDLIM_RST_OPENPORT; + rstreason = BANDLIM_TCP_RST; goto dropwithreset; } /* @@ -1261,7 +1265,7 @@ "Connection attempt to deprecated " "IPv6 address rejected\n", s, __func__); - rstreason = BANDLIM_RST_OPENPORT; + rstreason = BANDLIM_TCP_RST; goto dropwithreset; } } @@ -1382,9 +1386,10 @@ * When blackholing do not respond with a RST but * completely ignore the segment and drop it. */ - if (((rstreason == BANDLIM_RST_OPENPORT && V_blackhole == 3) || - (rstreason == BANDLIM_RST_CLOSEDPORT && - ((V_blackhole == 1 && (thflags & TH_SYN)) || V_blackhole > 1))) && + if (rstreason == BANDLIM_TCP_RST && + ((!closed_port && V_blackhole == 3) || + (closed_port && + ((V_blackhole == 1 && (thflags & TH_SYN)) || V_blackhole > 1))) && (V_blackhole_local || ( #ifdef INET6 isipv6 ? !in6_localip(&ip6->ip6_src) : @@ -1967,7 +1972,7 @@ if ((thflags & TH_ACK) && (SEQ_LEQ(th->th_ack, tp->snd_una) || SEQ_GT(th->th_ack, tp->snd_max))) { - rstreason = BANDLIM_RST_OPENPORT; + rstreason = BANDLIM_TCP_RST; tcp_log_end_status(tp, TCP_EI_STATUS_RST_IN_FRONT); goto dropwithreset; } @@ -1980,7 +1985,7 @@ * FIN, or a RST. */ if ((thflags & (TH_SYN|TH_ACK)) == (TH_SYN|TH_ACK)) { - rstreason = BANDLIM_RST_OPENPORT; + rstreason = BANDLIM_TCP_RST; tcp_log_end_status(tp, TCP_EI_STATUS_RST_IN_FRONT); goto dropwithreset; } else if (thflags & TH_SYN) { @@ -2248,7 +2253,7 @@ * for the "LAND" DoS attack. */ if (tp->t_state == TCPS_SYN_RECEIVED && SEQ_LT(th->th_seq, tp->irs)) { - rstreason = BANDLIM_RST_OPENPORT; + rstreason = BANDLIM_TCP_RST; tcp_log_end_status(tp, TCP_EI_STATUS_RST_IN_FRONT); goto dropwithreset; } @@ -3427,7 +3432,7 @@ if (tp->t_state == TCPS_SYN_RECEIVED && (thflags & TH_ACK) && (SEQ_GT(tp->snd_una, th->th_ack) || SEQ_GT(th->th_ack, tp->snd_max)) ) { - rstreason = BANDLIM_RST_OPENPORT; + rstreason = BANDLIM_TCP_RST; tcp_log_end_status(tp, TCP_EI_STATUS_RST_IN_FRONT); goto dropwithreset; } diff --git a/sys/netinet/tcp_stacks/bbr.c b/sys/netinet/tcp_stacks/bbr.c --- a/sys/netinet/tcp_stacks/bbr.c +++ b/sys/netinet/tcp_stacks/bbr.c @@ -8763,7 +8763,7 @@ (SEQ_LEQ(th->th_ack, tp->iss) || SEQ_GT(th->th_ack, tp->snd_max))) { tcp_log_end_status(tp, TCP_EI_STATUS_RST_IN_FRONT); - ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } if ((thflags & (TH_ACK | TH_RST)) == (TH_ACK | TH_RST)) { @@ -8965,7 +8965,7 @@ (SEQ_LEQ(th->th_ack, tp->snd_una) || SEQ_GT(th->th_ack, tp->snd_max))) { tcp_log_end_status(tp, TCP_EI_STATUS_RST_IN_FRONT); - ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } if (tp->t_flags & TF_FASTOPEN) { @@ -8977,7 +8977,7 @@ */ if ((thflags & (TH_SYN | TH_ACK)) == (TH_SYN | TH_ACK)) { tcp_log_end_status(tp, TCP_EI_STATUS_RST_IN_FRONT); - ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } else if (thflags & TH_SYN) { /* non-initial SYN is ignored */ @@ -9010,7 +9010,7 @@ */ if (SEQ_LT(th->th_seq, tp->irs)) { tcp_log_end_status(tp, TCP_EI_STATUS_RST_IN_FRONT); - ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } if (ctf_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { @@ -9288,7 +9288,7 @@ if (sbavail(&so->so_snd)) { if (ctf_progress_timeout_check(tp, true)) { bbr_log_progress_event(bbr, tp, tick, PROGRESS_DROP, __LINE__); - ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } } @@ -9385,7 +9385,7 @@ if (sbavail(&so->so_snd)) { if (ctf_progress_timeout_check(tp, true)) { bbr_log_progress_event(bbr, tp, tick, PROGRESS_DROP, __LINE__); - ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } } @@ -9535,7 +9535,7 @@ if (sbavail(&so->so_snd)) { if (ctf_progress_timeout_check(tp, true)) { bbr_log_progress_event(bbr, tp, tick, PROGRESS_DROP, __LINE__); - ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } } @@ -9637,7 +9637,7 @@ if (sbavail(&so->so_snd)) { if (ctf_progress_timeout_check(tp, true)) { bbr_log_progress_event(bbr, tp, tick, PROGRESS_DROP, __LINE__); - ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } } @@ -9739,7 +9739,7 @@ if (sbavail(&so->so_snd)) { if (ctf_progress_timeout_check(tp, true)) { bbr_log_progress_event(bbr, tp, tick, PROGRESS_DROP, __LINE__); - ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } } @@ -9848,7 +9848,7 @@ if (sbavail(&so->so_snd)) { if (ctf_progress_timeout_check(tp, true)) { bbr_log_progress_event(bbr, tp, tick, PROGRESS_DROP, __LINE__); - ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } } @@ -11510,7 +11510,7 @@ if ((tp->t_state == TCPS_SYN_SENT) && (thflags & TH_ACK) && (SEQ_LEQ(th->th_ack, tp->iss) || SEQ_GT(th->th_ack, tp->snd_max))) { tcp_log_end_status(tp, TCP_EI_STATUS_RST_IN_FRONT); - ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } if (tiwin > bbr->r_ctl.rc_high_rwnd) diff --git a/sys/netinet/tcp_stacks/rack.c b/sys/netinet/tcp_stacks/rack.c --- a/sys/netinet/tcp_stacks/rack.c +++ b/sys/netinet/tcp_stacks/rack.c @@ -12875,7 +12875,7 @@ (SEQ_LEQ(th->th_ack, tp->iss) || SEQ_GT(th->th_ack, tp->snd_max))) { tcp_log_end_status(tp, TCP_EI_STATUS_RST_IN_FRONT); - ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } if ((thflags & (TH_ACK | TH_RST)) == (TH_ACK | TH_RST)) { @@ -13089,7 +13089,7 @@ (SEQ_LEQ(th->th_ack, tp->snd_una) || SEQ_GT(th->th_ack, tp->snd_max))) { tcp_log_end_status(tp, TCP_EI_STATUS_RST_IN_FRONT); - ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } if (tp->t_flags & TF_FASTOPEN) { @@ -13102,7 +13102,7 @@ */ if ((thflags & (TH_SYN | TH_ACK)) == (TH_SYN | TH_ACK)) { tcp_log_end_status(tp, TCP_EI_STATUS_RST_IN_FRONT); - ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } else if (thflags & TH_SYN) { /* non-initial SYN is ignored */ @@ -13136,7 +13136,7 @@ */ if (SEQ_LT(th->th_seq, tp->irs)) { tcp_log_end_status(tp, TCP_EI_STATUS_RST_IN_FRONT); - ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } if (ctf_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { @@ -13399,7 +13399,7 @@ if (sbavail(&so->so_snd)) { if (ctf_progress_timeout_check(tp, true)) { rack_log_progress_event(rack, tp, tick, PROGRESS_DROP, __LINE__); - ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } } @@ -13495,7 +13495,7 @@ if (ctf_progress_timeout_check(tp, true)) { rack_log_progress_event((struct tcp_rack *)tp->t_fb_ptr, tp, tick, PROGRESS_DROP, __LINE__); - ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } } @@ -13645,7 +13645,7 @@ if (ctf_progress_timeout_check(tp, true)) { rack_log_progress_event((struct tcp_rack *)tp->t_fb_ptr, tp, tick, PROGRESS_DROP, __LINE__); - ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } } @@ -13746,7 +13746,7 @@ if (ctf_progress_timeout_check(tp, true)) { rack_log_progress_event((struct tcp_rack *)tp->t_fb_ptr, tp, tick, PROGRESS_DROP, __LINE__); - ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } } @@ -13848,7 +13848,7 @@ if (ctf_progress_timeout_check(tp, true)) { rack_log_progress_event((struct tcp_rack *)tp->t_fb_ptr, tp, tick, PROGRESS_DROP, __LINE__); - ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } } @@ -13952,7 +13952,7 @@ if (ctf_progress_timeout_check(tp, true)) { rack_log_progress_event((struct tcp_rack *)tp->t_fb_ptr, tp, tick, PROGRESS_DROP, __LINE__); - ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_TCP_RST, tlen); return (1); } } @@ -16655,7 +16655,7 @@ if ((tp->t_state == TCPS_SYN_SENT) && (thflags & TH_ACK) && (SEQ_LEQ(th->th_ack, tp->iss) || SEQ_GT(th->th_ack, tp->snd_max))) { tcp_log_end_status(tp, TCP_EI_STATUS_RST_IN_FRONT); - ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_TCP_RST, tlen); #ifdef TCP_ACCOUNTING sched_unpin(); #endif diff --git a/sys/netinet/tcp_stacks/rack_bbr_common.c b/sys/netinet/tcp_stacks/rack_bbr_common.c --- a/sys/netinet/tcp_stacks/rack_bbr_common.c +++ b/sys/netinet/tcp_stacks/rack_bbr_common.c @@ -672,7 +672,7 @@ (SEQ_GT(tp->snd_una, th->th_ack) || SEQ_GT(th->th_ack, tp->snd_max))) { *ret_val = 1; - ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_TCP_RST, tlen); return; } else *ret_val = 0;