api: multiple connections per process - vpp

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author	Dave Barach <dave@barachs.net>	2019-11-27 11:42:13 -0500
committer	Florin Coras <florin.coras@gmail.com>	2019-12-10 01:13:05 +0000
commit	39d69112fcec114fde34955ceb41555221d3ba11 (patch)
tree	156f21a0e66bf596b2c1e5184d82c80d99ea0a79 /src/plugins/dhcp/dhcp_proxy.h
parent	6b3f25caff262b536a5449ac5461dd041c92a655 (diff)

api: multiple connections per process

Type: feature Signed-off-by: Dave Barach <dave@barachs.net> Change-Id: I2272521d6e69edcd385ef684af6dd4eea5eaa953

Diffstat (limited to 'src/plugins/dhcp/dhcp_proxy.h')

0 files changed, 0 insertions, 0 deletions

/* * Copyright (c) 2016 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /** * @file * @brief TCP host stack utilities */ #include <vnet/tcp/tcp.h> #include <vnet/session/session.h> #include <vnet/fib/fib.h> #include <vnet/dpo/load_balance.h> #include <vnet/dpo/receive_dpo.h> #include <vnet/ip/ip6_neighbor.h> #include <math.h> tcp_main_t tcp_main; static u32 tcp_connection_bind (u32 session_index, transport_endpoint_t * lcl) { tcp_main_t *tm = &tcp_main; tcp_connection_t *listener; pool_get (tm->listener_pool, listener); memset (listener, 0, sizeof (*listener)); listener->c_c_index = listener - tm->listener_pool; listener->c_lcl_port = clib_host_to_net_u16 (lcl->port); if (lcl->is_ip4) { listener->c_lcl_ip4.as_u32 = lcl->ip.ip4.as_u32; listener->c_is_ip4 = 1; } else { clib_memcpy (&listener->c_lcl_ip6, &lcl->ip.ip6, sizeof (ip6_address_t)); } listener->c_transport_proto = TRANSPORT_PROTO_TCP; listener->c_s_index = session_index; listener->state = TCP_STATE_LISTEN; tcp_connection_timers_init (listener); TCP_EVT_DBG (TCP_EVT_BIND, listener); return listener->c_c_index; } u32 tcp_session_bind (u32 session_index, transport_endpoint_t * tep) { return tcp_connection_bind (session_index, tep); } static void tcp_connection_unbind (u32 listener_index) { tcp_main_t *tm = vnet_get_tcp_main (); tcp_connection_t *tc; tc = pool_elt_at_index (tm->listener_pool, listener_index); TCP_EVT_DBG (TCP_EVT_UNBIND, tc); /* Poison the entry */ if (CLIB_DEBUG > 0) memset (tc, 0xFA, sizeof (*tc)); pool_put_index (tm->listener_pool, listener_index); } u32 tcp_session_unbind (u32 listener_index) { tcp_connection_unbind (listener_index); return 0; } transport_connection_t * tcp_session_get_listener (u32 listener_index) { tcp_main_t *tm = vnet_get_tcp_main (); tcp_connection_t *tc; tc = pool_elt_at_index (tm->listener_pool, listener_index); return &tc->connection; } always_inline void transport_endpoint_del (u32 tepi) { tcp_main_t *tm = vnet_get_tcp_main (); clib_spinlock_lock_if_init (&tm->local_endpoints_lock); pool_put_index (tm->local_endpoints, tepi); clib_spinlock_unlock_if_init (&tm->local_endpoints_lock); } always_inline transport_endpoint_t * transport_endpoint_new (void) { tcp_main_t *tm = vnet_get_tcp_main (); transport_endpoint_t *tep; pool_get (tm->local_endpoints, tep); return tep; } /** * Cleanup half-open connection * */ void tcp_half_open_connection_del (tcp_connection_t * tc) { tcp_main_t *tm = vnet_get_tcp_main (); clib_spinlock_lock_if_init (&tm->half_open_lock); pool_put_index (tm->half_open_connections, tc->c_c_index); if (CLIB_DEBUG) memset (tc, 0xFA, sizeof (*tc)); clib_spinlock_unlock_if_init (&tm->half_open_lock); } /** * Try to cleanup half-open connection * * If called from a thread that doesn't own tc, the call won't have any * effect. * * @param tc - connection to be cleaned up * @return non-zero if cleanup failed. */ int tcp_half_open_connection_cleanup (tcp_connection_t * tc) { /* Make sure this is the owning thread */ if (tc->c_thread_index != vlib_get_thread_index ()) return 1; tcp_timer_reset (tc, TCP_TIMER_ESTABLISH); tcp_timer_reset (tc, TCP_TIMER_RETRANSMIT_SYN); tcp_half_open_connection_del (tc); return 0; } tcp_connection_t * tcp_half_open_connection_new (void) { tcp_main_t *tm = vnet_get_tcp_main (); tcp_connection_t *tc = 0; ASSERT (vlib_get_thread_index () == 0); pool_get (tm->half_open_connections, tc); memset (tc, 0, sizeof (*tc)); tc->c_c_index = tc - tm->half_open_connections; return tc; } /** * Cleans up connection state. * * No notifications. */ void tcp_connection_cleanup (tcp_connection_t * tc) { tcp_main_t *tm = &tcp_main; u32 tepi; transport_endpoint_t *tep; /* Cleanup local endpoint if this was an active connect */ tepi = transport_endpoint_lookup (&tm->local_endpoints_table, &tc->c_lcl_ip, clib_net_to_host_u16 (tc->c_lcl_port)); if (tepi != TRANSPORT_ENDPOINT_INVALID_INDEX) { tep = pool_elt_at_index (tm->local_endpoints, tepi); transport_endpoint_table_del (&tm->local_endpoints_table, tep); transport_endpoint_del (tepi); } /* Check if connection is not yet fully established */ if (tc->state == TCP_STATE_SYN_SENT) { /* Try to remove the half-open connection. If this is not the owning * thread, tc won't be removed. Retransmit or establish timers will * eventually expire and call again cleanup on the right thread. */ tcp_half_open_connection_cleanup (tc); } else { int thread_index = tc->c_thread_index; /* Make sure all timers are cleared */ tcp_connection_timers_reset (tc); /* Poison the entry */ if (CLIB_DEBUG > 0) memset (tc, 0xFA, sizeof (*tc)); pool_put (tm->connections[thread_index], tc); } } /** * Connection removal. * * This should be called only once connection enters CLOSED state. Note * that it notifies the session of the removal event, so if the goal is to * just remove the connection, call tcp_connection_cleanup instead. */ void tcp_connection_del (tcp_connection_t * tc) { TCP_EVT_DBG (TCP_EVT_DELETE, tc); stream_session_delete_notify (&tc->connection); tcp_connection_cleanup (tc); } tcp_connection_t * tcp_connection_new (u8 thread_index) { tcp_main_t *tm = vnet_get_tcp_main (); tcp_connection_t *tc; pool_get (tm->connections[thread_index], tc); memset (tc, 0, sizeof (*tc)); tc->c_c_index = tc - tm->connections[thread_index]; tc->c_thread_index = thread_index; return tc; } /** Notify session that connection has been reset. * * Switch state to closed and wait for session to call cleanup. */ void tcp_connection_reset (tcp_connection_t * tc) { TCP_EVT_DBG (TCP_EVT_RST_RCVD, tc); switch (tc->state) { case TCP_STATE_SYN_RCVD: /* Cleanup everything. App wasn't notified yet */ stream_session_delete_notify (&tc->connection); tcp_connection_cleanup (tc); break; case TCP_STATE_SYN_SENT: stream_session_connect_notify (&tc->connection, 1 /* fail */ ); tcp_connection_cleanup (tc); break; case TCP_STATE_ESTABLISHED: case TCP_STATE_CLOSE_WAIT: case TCP_STATE_FIN_WAIT_1: case TCP_STATE_FIN_WAIT_2: case TCP_STATE_CLOSING: tc->state = TCP_STATE_CLOSED; TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc); /* Make sure all timers are cleared */ tcp_connection_timers_reset (tc); stream_session_reset_notify (&tc->connection); /* Wait for cleanup from session layer but not forever */ tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_CLEANUP_TIME); break; case TCP_STATE_CLOSED: return; } } /** * Begin connection closing procedure. * * If at the end the connection is not in CLOSED state, it is not removed. * Instead, we rely on on TCP to advance through state machine to either * 1) LAST_ACK (passive close) whereby when the last ACK is received * tcp_connection_del is called. This notifies session of the delete and * calls cleanup. * 2) TIME_WAIT (active close) whereby after 2MSL the 2MSL timer triggers * and cleanup is called. * * N.B. Half-close connections are not supported */ void tcp_connection_close (tcp_connection_t * tc) { TCP_EVT_DBG (TCP_EVT_CLOSE, tc); /* Send/Program FIN if needed and switch state */ switch (tc->state) { case TCP_STATE_SYN_SENT: tc->state = TCP_STATE_CLOSED; break; case TCP_STATE_SYN_RCVD: tcp_send_fin (tc); tc->state = TCP_STATE_FIN_WAIT_1; break; case TCP_STATE_ESTABLISHED: if (!stream_session_tx_fifo_max_dequeue (&tc->connection)) tcp_send_fin (tc); else tc->flags |= TCP_CONN_FINPNDG; tc->state = TCP_STATE_FIN_WAIT_1; break; case TCP_STATE_CLOSE_WAIT: tcp_send_fin (tc); tc->state = TCP_STATE_LAST_ACK; break; case TCP_STATE_FIN_WAIT_1: break; default: clib_warning ("state: %u", tc->state); } TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc); /* If in CLOSED and WAITCLOSE timer is not set, delete connection now */ if (tc->timers[TCP_TIMER_WAITCLOSE] == TCP_TIMER_HANDLE_INVALID && tc->state == TCP_STATE_CLOSED) tcp_connection_del (tc); } void tcp_session_close (u32 conn_index, u32 thread_index) { tcp_connection_t *tc; tc = tcp_connection_get (conn_index, thread_index); tcp_connection_close (tc); } void tcp_session_cleanup (u32 conn_index, u32 thread_index) { tcp_connection_t *tc; tc = tcp_connection_get (conn_index, thread_index); /* Wait for the session tx events to clear */ tc->state = TCP_STATE_CLOSED; TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc); tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_CLEANUP_TIME); } void * ip_interface_get_first_ip (u32 sw_if_index, u8 is_ip4) { ip_lookup_main_t *lm4 = &ip4_main.lookup_main; ip_lookup_main_t *lm6 = &ip6_main.lookup_main; ip_interface_address_t *ia = 0; if (is_ip4) { /* *INDENT-OFF* */ foreach_ip_interface_address (lm4, ia, sw_if_index, 1 /* unnumbered */ , ({ return ip_interface_address_get_address (lm4, ia); })); /* *INDENT-ON* */ } else { /* *INDENT-OFF* */ foreach_ip_interface_address (lm6, ia, sw_if_index, 1 /* unnumbered */ , ({ ip6_address_t *rv; rv = ip_interface_address_get_address (lm6, ia); /* Trying to use a link-local ip6 src address is a fool's errand */ if (!ip6_address_is_link_local_unicast (rv)) return rv; })); /* *INDENT-ON* */ } return 0; } #define PORT_MASK ((1 << 16)- 1) /** * Allocate local port and add if successful add entry to local endpoint * table to mark the pair as used. */ int tcp_allocate_local_port (ip46_address_t * ip) { tcp_main_t *tm = vnet_get_tcp_main (); transport_endpoint_t *tep; u32 tei; u16 min = 1024, max = 65535; /* XXX configurable ? */ int tries, limit; limit = max - min; /* Only support active opens from thread 0 */ ASSERT (vlib_get_thread_index () == 0); /* Search for first free slot */ for (tries = 0; tries < limit; tries++) { u16 port = 0; /* Find a port in the specified range */ while (1) { port = random_u32 (&tm->port_allocator_seed) & PORT_MASK; if (PREDICT_TRUE (port >= min && port < max)) break; } /* Look it up */ tei = transport_endpoint_lookup (&tm->local_endpoints_table, ip, port); /* If not found, we're done */ if (tei == TRANSPORT_ENDPOINT_INVALID_INDEX) { clib_spinlock_lock_if_init (&tm->local_endpoints_lock); tep = transport_endpoint_new (); clib_memcpy (&tep->ip, ip, sizeof (*ip)); tep->port = port; transport_endpoint_table_add (&tm->local_endpoints_table, tep, tep - tm->local_endpoints); clib_spinlock_unlock_if_init (&tm->local_endpoints_lock); return tep->port; } } return -1; } /** * Initialize all connection timers as invalid */ void tcp_connection_timers_init (tcp_connection_t * tc) { int i; /* Set all to invalid */ for (i = 0; i < TCP_N_TIMERS; i++) { tc->timers[i] = TCP_TIMER_HANDLE_INVALID; } tc->rto = TCP_RTO_INIT; } /** * Stop all connection timers */ void tcp_connection_timers_reset (tcp_connection_t * tc) { int i; for (i = 0; i < TCP_N_TIMERS; i++) { tcp_timer_reset (tc, i); } } #if 0 typedef struct ip4_tcp_hdr { ip4_header_t ip; tcp_header_t tcp; } ip4_tcp_hdr_t; typedef struct ip6_tcp_hdr { ip6_header_t ip; tcp_header_t tcp; } ip6_tcp_hdr_t; static void tcp_connection_select_lb_bucket (tcp_connection_t * tc, const dpo_id_t * dpo, dpo_id_t * result) { const dpo_id_t *choice; load_balance_t *lb; int hash; lb = load_balance_get (dpo->dpoi_index); if (tc->c_is_ip4) { ip4_tcp_hdr_t hdr; memset (&hdr, 0, sizeof (hdr)); hdr.ip.protocol = IP_PROTOCOL_TCP; hdr.ip.address_pair.src.as_u32 = tc->c_lcl_ip.ip4.as_u32; hdr.ip.address_pair.dst.as_u32 = tc->c_rmt_ip.ip4.as_u32; hdr.tcp.src_port = tc->c_lcl_port; hdr.tcp.dst_port = tc->c_rmt_port; hash = ip4_compute_flow_hash (&hdr.ip, lb->lb_hash_config); } else { ip6_tcp_hdr_t hdr; memset (&hdr, 0, sizeof (hdr)); hdr.ip.protocol = IP_PROTOCOL_TCP; clib_memcpy (&hdr.ip.src_address, &tc->c_lcl_ip.ip6, sizeof (ip6_address_t)); clib_memcpy (&hdr.ip.dst_address, &tc->c_rmt_ip.ip6, sizeof (ip6_address_t)); hdr.tcp.src_port = tc->c_lcl_port; hdr.tcp.dst_port = tc->c_rmt_port; hash = ip6_compute_flow_hash (&hdr.ip, lb->lb_hash_config); } choice = load_balance_get_bucket_i (lb, hash & lb->lb_n_buckets_minus_1); dpo_copy (result, choice); } fib_node_index_t tcp_lookup_rmt_in_fib (tcp_connection_t * tc) { fib_prefix_t prefix; u32 fib_index; clib_memcpy (&prefix.fp_addr, &tc->c_rmt_ip, sizeof (prefix.fp_addr)); prefix.fp_proto = tc->c_is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6; prefix.fp_len = tc->c_is_ip4 ? 32 : 128; fib_index = fib_table_find (prefix.fp_proto, tc->c_vrf); return fib_table_lookup (fib_index, &prefix); } static int tcp_connection_stack_on_fib_entry (tcp_connection_t * tc) { dpo_id_t choice = DPO_INVALID; u32 output_node_index; fib_entry_t *fe; fe = fib_entry_get (tc->c_rmt_fei); if (fe->fe_lb.dpoi_type != DPO_LOAD_BALANCE) return -1; tcp_connection_select_lb_bucket (tc, &fe->fe_lb, &choice); output_node_index = tc->c_is_ip4 ? tcp4_output_node.index : tcp6_output_node.index; dpo_stack_from_node (output_node_index, &tc->c_rmt_dpo, &choice); return 0; } /** Stack tcp connection on peer's fib entry. * * This ultimately populates the dpo the connection will use to send packets. */ static void tcp_connection_fib_attach (tcp_connection_t * tc) { tc->c_rmt_fei = tcp_lookup_rmt_in_fib (tc); ASSERT (tc->c_rmt_fei != FIB_NODE_INDEX_INVALID); tcp_connection_stack_on_fib_entry (tc); } #endif /* 0 */ /** * Initialize connection send variables. */ void tcp_init_snd_vars (tcp_connection_t * tc) { u32 time_now; /* Set random initial sequence */ time_now = tcp_time_now (); tc->iss = random_u32 (&time_now); tc->snd_una = tc->iss; tc->snd_nxt = tc->iss + 1; tc->snd_una_max = tc->snd_nxt; } /** Initialize tcp connection variables * * Should be called after having received a msg from the peer, i.e., a SYN or * a SYNACK, such that connection options have already been exchanged. */ void tcp_connection_init_vars (tcp_connection_t * tc) { tcp_connection_timers_init (tc); tcp_init_mss (tc); scoreboard_init (&tc->sack_sb); tcp_cc_init (tc); if (tc->state == TCP_STATE_SYN_RCVD) tcp_init_snd_vars (tc); // tcp_connection_fib_attach (tc); } int tcp_connection_open (transport_endpoint_t * rmt) { tcp_main_t *tm = vnet_get_tcp_main (); tcp_connection_t *tc; fib_prefix_t prefix; fib_node_index_t fei; u32 sw_if_index, fib_index; ip46_address_t lcl_addr; int lcl_port; /* * Find the local address and allocate port */ memset (&lcl_addr, 0, sizeof (lcl_addr)); /* Find a FIB path to the destination */ clib_memcpy (&prefix.fp_addr, &rmt->ip, sizeof (rmt->ip)); prefix.fp_proto = rmt->is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6; prefix.fp_len = rmt->is_ip4 ? 32 : 128; fib_index = fib_table_find (prefix.fp_proto, rmt->vrf); if (fib_index == (u32) ~ 0) { clib_warning ("no fib table"); return -1; } fei = fib_table_lookup (fib_index, &prefix); /* Couldn't find route to destination. Bail out. */ if (fei == FIB_NODE_INDEX_INVALID) { clib_warning ("no route to destination"); return -1; } sw_if_index = fib_entry_get_resolving_interface (fei); if (sw_if_index == (u32) ~ 0) { clib_warning ("no resolving interface for %U", format_ip46_address, &rmt->ip, IP46_TYPE_IP4); return -1; } if (rmt->is_ip4) { ip4_address_t *ip4; int index; if (vec_len (tm->ip4_src_addresses)) { index = tm->last_v4_address_rotor++; if (tm->last_v4_address_rotor >= vec_len (tm->ip4_src_addresses)) tm->last_v4_address_rotor = 0; lcl_addr.ip4.as_u32 = tm->ip4_src_addresses[index].as_u32; } else { ip4 = ip_interface_get_first_ip (sw_if_index, 1); lcl_addr.ip4.as_u32 = ip4->as_u32; } } else { ip6_address_t *ip6; int index; if (vec_len (tm->ip6_src_addresses)) { index = tm->last_v6_address_rotor++; if (tm->last_v6_address_rotor >= vec_len (tm->ip6_src_addresses)) tm->last_v6_address_rotor = 0; clib_memcpy (&lcl_addr.ip6, &tm->ip6_src_addresses[index], sizeof (*ip6)); } else { ip6 = ip_interface_get_first_ip (sw_if_index, 0); if (ip6 == 0) { clib_warning ("no routable ip6 addresses on %U", format_vnet_sw_if_index_name, vnet_get_main (), sw_if_index); return -1; } clib_memcpy (&lcl_addr.ip6, ip6, sizeof (*ip6)); } } /* Allocate source port */ lcl_port = tcp_allocate_local_port (&lcl_addr); if (lcl_port < 1) { clib_warning ("Failed to allocate src port"); return -1; } /* * Create connection and send SYN */ clib_spinlock_lock_if_init (&tm->half_open_lock); tc = tcp_half_open_connection_new (); clib_memcpy (&tc->c_rmt_ip, &rmt->ip, sizeof (ip46_address_t)); clib_memcpy (&tc->c_lcl_ip, &lcl_addr, sizeof (ip46_address_t)); tc->c_rmt_port = clib_host_to_net_u16 (rmt->port); tc->c_lcl_port = clib_host_to_net_u16 (lcl_port); tc->c_is_ip4 = rmt->is_ip4; tc->c_transport_proto = TRANSPORT_PROTO_TCP; tc->c_vrf = rmt->vrf; /* The other connection vars will be initialized after SYN ACK */ tcp_connection_timers_init (tc); TCP_EVT_DBG (TCP_EVT_OPEN, tc); tc->state = TCP_STATE_SYN_SENT; tcp_init_snd_vars (tc); tcp_send_syn (tc); clib_spinlock_unlock_if_init (&tm->half_open_lock); return tc->c_c_index; } int tcp_session_open (transport_endpoint_t * tep) { return tcp_connection_open (tep); } const char *tcp_dbg_evt_str[] = { #define _(sym, str) str, foreach_tcp_dbg_evt #undef _ }; const char *tcp_fsm_states[] = { #define _(sym, str) str, foreach_tcp_fsm_state #undef _ }; u8 * format_tcp_state (u8 * s, va_list * args) { u32 state = va_arg (*args, u32); if (state < TCP_N_STATES) s = format (s, "%s", tcp_fsm_states[state]); else s = format (s, "UNKNOWN (%d (0x%x))", state, state); return s; } const char *tcp_conn_timers[] = { #define _(sym, str) str, foreach_tcp_timer #undef _ }; u8 * format_tcp_timers (u8 * s, va_list * args) { tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); int i, last = -1; for (i = 0; i < TCP_N_TIMERS; i++) if (tc->timers[i] != TCP_TIMER_HANDLE_INVALID) last = i; s = format (s, "["); for (i = 0; i < last; i++) { if (tc->timers[i] != TCP_TIMER_HANDLE_INVALID) s = format (s, "%s,", tcp_conn_timers[i]); } if (last >= 0) s = format (s, "%s]", tcp_conn_timers[i]); else s = format (s, "]"); return s; } u8 * format_tcp_congestion_status (u8 * s, va_list * args) { tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); if (tcp_in_recovery (tc)) s = format (s, "recovery"); else if (tcp_in_fastrecovery (tc)) s = format (s, "fastrecovery"); else s = format (s, "none"); return s; } u8 * format_tcp_vars (u8 * s, va_list * args) { tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); s = format (s, " snd_una %u snd_nxt %u snd_una_max %u", tc->snd_una - tc->iss, tc->snd_nxt - tc->iss, tc->snd_una_max - tc->iss); s = format (s, " rcv_nxt %u rcv_las %u\n", tc->rcv_nxt - tc->irs, tc->rcv_las - tc->irs); s = format (s, " snd_wnd %u rcv_wnd %u snd_wl1 %u snd_wl2 %u\n", tc->snd_wnd, tc->rcv_wnd, tc->snd_wl1 - tc->irs, tc->snd_wl2 - tc->iss); s = format (s, " flight size %u send space %u rcv_wnd_av %d\n", tcp_flight_size (tc), tcp_available_output_snd_space (tc), tcp_rcv_wnd_available (tc)); s = format (s, " cong %U ", format_tcp_congestion_status, tc); s = format (s, "cwnd %u ssthresh %u rtx_bytes %u bytes_acked %u\n", tc->cwnd, tc->ssthresh, tc->snd_rxt_bytes, tc->bytes_acked); s = format (s, " prev_ssthresh %u snd_congestion %u dupack %u", tc->prev_ssthresh, tc->snd_congestion - tc->iss, tc->rcv_dupacks); s = format (s, " limited_transmit %u\n", tc->limited_transmit - tc->iss); s = format (s, " tsecr %u tsecr_last_ack %u\n", tc->rcv_opts.tsecr, tc->tsecr_last_ack); s = format (s, " rto %u rto_boff %u srtt %u rttvar %u rtt_ts %u ", tc->rto, tc->rto_boff, tc->srtt, tc->rttvar, tc->rtt_ts); s = format (s, "rtt_seq %u\n", tc->rtt_seq); s = format (s, " tsval_recent %u tsval_recent_age %u\n", tc->tsval_recent, tcp_time_now () - tc->tsval_recent_age); s = format (s, " scoreboard: %U\n", format_tcp_scoreboard, &tc->sack_sb, tc); if (vec_len (tc->snd_sacks)) s = format (s, " sacks tx: %U\n", format_tcp_sacks, tc); return s; } u8 * format_tcp_connection_id (u8 * s, va_list * args) { tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); if (!tc) return s; if (tc->c_is_ip4) { s = format (s, "[#%d][%s] %U:%d->%U:%d", tc->c_thread_index, "T", format_ip4_address, &tc->c_lcl_ip4, clib_net_to_host_u16 (tc->c_lcl_port), format_ip4_address, &tc->c_rmt_ip4, clib_net_to_host_u16 (tc->c_rmt_port)); } else { s = format (s, "[#%d][%s] %U:%d->%U:%d", tc->c_thread_index, "T", format_ip6_address, &tc->c_lcl_ip6, clib_net_to_host_u16 (tc->c_lcl_port), format_ip6_address, &tc->c_rmt_ip6, clib_net_to_host_u16 (tc->c_rmt_port)); } return s; } u8 * format_tcp_connection (u8 * s, va_list * args) { tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); u32 verbose = va_arg (*args, u32); if (!tc) return s; s = format (s, "%-50U", format_tcp_connection_id, tc); if (verbose) { s = format (s, "%-15U", format_tcp_state, tc->state); if (verbose > 1) s = format (s, " %U\n%U", format_tcp_timers, tc, format_tcp_vars, tc); } return s; } u8 * format_tcp_session (u8 * s, va_list * args) { u32 tci = va_arg (*args, u32); u32 thread_index = va_arg (*args, u32); u32 verbose = va_arg (*args, u32); tcp_connection_t *tc; tc = tcp_connection_get (tci, thread_index); if (tc) s = format (s, "%U", format_tcp_connection, tc, verbose); else s = format (s, "empty\n"); return s; } u8 * format_tcp_listener_session (u8 * s, va_list * args) { u32 tci = va_arg (*args, u32); tcp_connection_t *tc = tcp_listener_get (tci); return format (s, "%U", format_tcp_connection_id, tc); } u8 * format_tcp_half_open_session (u8 * s, va_list * args) { u32 tci = va_arg (*args, u32); tcp_connection_t *tc = tcp_half_open_connection_get (tci); return format (s, "%U", format_tcp_connection_id, tc); } u8 * format_tcp_sacks (u8 * s, va_list * args) { tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); sack_block_t *sacks = tc->snd_sacks; sack_block_t *block; int i, len = 0; len = vec_len (sacks); for (i = 0; i < len - 1; i++) { block = &sacks[i]; s = format (s, " start %u end %u\n", block->start - tc->irs, block->end - tc->irs); } if (len) { block = &sacks[len - 1]; s = format (s, " start %u end %u", block->start - tc->irs, block->end - tc->irs); } return s; } u8 * format_tcp_rcv_sacks (u8 * s, va_list * args) { tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); sack_block_t *sacks = tc->rcv_opts.sacks; sack_block_t *block; int i, len = 0; len = vec_len (sacks); for (i = 0; i < len - 1; i++) { block = &sacks[i]; s = format (s, " start %u end %u\n", block->start - tc->iss, block->end - tc->iss); } if (len) { block = &sacks[len - 1]; s = format (s, " start %u end %u", block->start - tc->iss, block->end - tc->iss); } return s; } u8 * format_tcp_sack_hole (u8 * s, va_list * args) { sack_scoreboard_hole_t *hole = va_arg (*args, sack_scoreboard_hole_t *); tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); if (tc) s = format (s, " [%u, %u]", hole->start - tc->iss, hole->end - tc->iss); else s = format (s, " [%u, %u]", hole->start, hole->end); return s; } u8 * format_tcp_scoreboard (u8 * s, va_list * args) { sack_scoreboard_t *sb = va_arg (*args, sack_scoreboard_t *); tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); sack_scoreboard_hole_t *hole; s = format (s, "sacked_bytes %u last_sacked_bytes %u lost_bytes %u\n", sb->sacked_bytes, sb->last_sacked_bytes, sb->lost_bytes); s = format (s, " last_bytes_delivered %u high_sacked %u snd_una_adv %u\n", sb->last_bytes_delivered, sb->high_sacked, sb->snd_una_adv); s = format (s, " cur_rxt_hole %u high_rxt %u rescue_rxt %u", sb->cur_rxt_hole, sb->high_rxt, sb->rescue_rxt); hole = scoreboard_first_hole (sb); if (hole) s = format (s, "\n head %u tail %u holes:\n", sb->head, sb->tail); while (hole) { s = format (s, "%U", format_tcp_sack_hole, hole, tc); hole = scoreboard_next_hole (sb, hole); } return s; } transport_connection_t * tcp_session_get_transport (u32 conn_index, u32 thread_index) { tcp_connection_t *tc = tcp_connection_get (conn_index, thread_index); return &tc->connection; } transport_connection_t * tcp_half_open_session_get_transport (u32 conn_index) { tcp_connection_t *tc = tcp_half_open_connection_get (conn_index); return &tc->connection; } /** * Compute maximum segment size for session layer. * * Since the result needs to be the actual data length, it first computes * the tcp options to be used in the next burst and subtracts their * length from the connection's snd_mss. */ u16 tcp_session_send_mss (transport_connection_t * trans_conn) { tcp_connection_t *tc = (tcp_connection_t *) trans_conn; /* Ensure snd_mss does accurately reflect the amount of data we can push * in a segment. This also makes sure that options are updated according to * the current state of the connection. */ tcp_update_snd_mss (tc); return tc->snd_mss; } always_inline u32 tcp_round_snd_space (tcp_connection_t * tc, u32 snd_space) { if (PREDICT_FALSE (tc->snd_wnd < tc->snd_mss)) { return tc->snd_wnd <= snd_space ? tc->snd_wnd : 0; } /* If not snd_wnd constrained and we can't write at least a segment, * don't try at all */ if (PREDICT_FALSE (snd_space < tc->snd_mss)) return snd_space < tc->cwnd ? 0 : snd_space; /* round down to mss multiple */ return snd_space - (snd_space % tc->snd_mss); } /** * Compute tx window session is allowed to fill. * * Takes into account available send space, snd_mss and the congestion * state of the connection. If possible, the value returned is a multiple * of snd_mss. * * @param tc tcp connection * @return number of bytes session is allowed to write */ u32 tcp_snd_space (tcp_connection_t * tc) { int snd_space, snt_limited; if (PREDICT_TRUE (tcp_in_cong_recovery (tc) == 0)) { snd_space = tcp_available_output_snd_space (tc); /* If we haven't gotten dupacks or if we did and have gotten sacked * bytes then we can still send as per Limited Transmit (RFC3042) */ if (PREDICT_FALSE (tc->rcv_dupacks != 0 && (tcp_opts_sack_permitted (tc) && tc->sack_sb.last_sacked_bytes == 0))) { if (tc->rcv_dupacks == 1 && tc->limited_transmit != tc->snd_nxt) tc->limited_transmit = tc->snd_nxt; ASSERT (seq_leq (tc->limited_transmit, tc->snd_nxt)); snt_limited = tc->snd_nxt - tc->limited_transmit; snd_space = clib_max (2 * tc->snd_mss - snt_limited, 0); } return tcp_round_snd_space (tc, snd_space); } if (tcp_in_recovery (tc)) { tc->snd_nxt = tc->snd_una_max; snd_space = tcp_available_snd_wnd (tc) - tc->snd_rxt_bytes - (tc->snd_una_max - tc->snd_congestion); if (snd_space <= 0 || (tc->snd_una_max - tc->snd_una) >= tc->snd_wnd) return 0; return tcp_round_snd_space (tc, snd_space); } /* RFC 5681: When previously unsent data is available and the new value of * cwnd and the receiver's advertised window allow, a TCP SHOULD send 1*SMSS * bytes of previously unsent data. */ if (tcp_in_fastrecovery (tc) && !tcp_fastrecovery_sent_1_smss (tc)) { if (tcp_available_output_snd_space (tc) < tc->snd_mss) return 0; tcp_fastrecovery_1_smss_on (tc); return tc->snd_mss; } return 0; } u32 tcp_session_send_space (transport_connection_t * trans_conn) { tcp_connection_t *tc = (tcp_connection_t *) trans_conn; return clib_min (tcp_snd_space (tc), tc->snd_wnd - (tc->snd_nxt - tc->snd_una)); } i32 tcp_rcv_wnd_available (tcp_connection_t * tc) { return (i32) tc->rcv_wnd - (tc->rcv_nxt - tc->rcv_las); } u32 tcp_session_tx_fifo_offset (transport_connection_t * trans_conn) { tcp_connection_t *tc = (tcp_connection_t *) trans_conn; ASSERT (seq_geq (tc->snd_nxt, tc->snd_una)); /* This still works if fast retransmit is on */ return (tc->snd_nxt - tc->snd_una); } /* *INDENT-OFF* */ const static transport_proto_vft_t tcp_proto = { .bind = tcp_session_bind, .unbind = tcp_session_unbind, .push_header = tcp_push_header, .get_connection = tcp_session_get_transport, .get_listener = tcp_session_get_listener, .get_half_open = tcp_half_open_session_get_transport, .open = tcp_session_open, .close = tcp_session_close, .cleanup = tcp_session_cleanup, .send_mss = tcp_session_send_mss, .send_space = tcp_session_send_space, .tx_fifo_offset = tcp_session_tx_fifo_offset, .format_connection = format_tcp_session, .format_listener = format_tcp_listener_session, .format_half_open = format_tcp_half_open_session, }; /* *INDENT-ON* */ void tcp_timer_keep_handler (u32 conn_index) { u32 thread_index = vlib_get_thread_index (); tcp_connection_t *tc; tc = tcp_connection_get (conn_index, thread_index); tc->timers[TCP_TIMER_KEEP] = TCP_TIMER_HANDLE_INVALID; tcp_connection_close (tc); } void tcp_timer_establish_handler (u32 conn_index) { tcp_connection_t *tc; tc = tcp_half_open_connection_get (conn_index); if (tc) { ASSERT (tc->state == TCP_STATE_SYN_SENT); stream_session_connect_notify (&tc->connection, 1 /* fail */ ); TCP_DBG ("establish pop: %U", format_tcp_connection, tc, 2); } else { tc = tcp_connection_get (conn_index, vlib_get_thread_index ()); /* note: the connection may have already disappeared */ if (PREDICT_FALSE (tc == 0)) return; TCP_DBG ("establish pop: %U", format_tcp_connection, tc, 2); ASSERT (tc->state == TCP_STATE_SYN_RCVD); /* Start cleanup. App wasn't notified yet so use delete notify as * opposed to delete to cleanup session layer state. */ stream_session_delete_notify (&tc->connection); } tc->timers[TCP_TIMER_ESTABLISH] = TCP_TIMER_HANDLE_INVALID; tcp_connection_cleanup (tc); } void tcp_timer_waitclose_handler (u32 conn_index) { u32 thread_index = vlib_get_thread_index (); tcp_connection_t *tc; tc = tcp_connection_get (conn_index, thread_index); if (!tc) return; tc->timers[TCP_TIMER_WAITCLOSE] = TCP_TIMER_HANDLE_INVALID; /* Session didn't come back with a close(). Send FIN either way * and switch to LAST_ACK. */ if (tc->state == TCP_STATE_CLOSE_WAIT) { if (tc->flags & TCP_CONN_FINSNT) { clib_warning ("FIN was sent and still in CLOSE WAIT. Weird!"); } tcp_send_fin (tc); tc->state = TCP_STATE_LAST_ACK; /* Make sure we don't wait in LAST ACK forever */ tcp_timer_set (tc, TCP_TIMER_WAITCLOSE, TCP_2MSL_TIME); /* Don't delete the connection yet */ return; } tcp_connection_del (tc); } /* *INDENT-OFF* */ static timer_expiration_handler *timer_expiration_handlers[TCP_N_TIMERS] = { tcp_timer_retransmit_handler, tcp_timer_delack_handler, tcp_timer_persist_handler, tcp_timer_keep_handler, tcp_timer_waitclose_handler, tcp_timer_retransmit_syn_handler, tcp_timer_establish_handler }; /* *INDENT-ON* */ static void tcp_expired_timers_dispatch (u32 * expired_timers) { int i; u32 connection_index, timer_id; for (i = 0; i < vec_len (expired_timers); i++) { /* Get session index and timer id */ connection_index = expired_timers[i] & 0x0FFFFFFF; timer_id = expired_timers[i] >> 28; TCP_EVT_DBG (TCP_EVT_TIMER_POP, connection_index, timer_id); /* Handle expiration */ (*timer_expiration_handlers[timer_id]) (connection_index); } } void tcp_initialize_timer_wheels (tcp_main_t * tm) { tw_timer_wheel_16t_2w_512sl_t *tw; /* *INDENT-OFF* */ foreach_vlib_main (({ tw = &tm->timer_wheels[ii]; tw_timer_wheel_init_16t_2w_512sl (tw, tcp_expired_timers_dispatch, 100e-3 /* timer period 100ms */ , ~0); tw->last_run_time = vlib_time_now (this_vlib_main); })); /* *INDENT-ON* */ } clib_error_t * tcp_main_enable (vlib_main_t * vm) { tcp_main_t *tm = vnet_get_tcp_main (); ip_protocol_info_t *pi; ip_main_t *im = &ip_main; vlib_thread_main_t *vtm = vlib_get_thread_main (); clib_error_t *error = 0; u32 num_threads; int thread; tcp_connection_t *tc __attribute__ ((unused)); u32 preallocated_connections_per_thread; if ((error = vlib_call_init_function (vm, ip_main_init))) return error; if ((error = vlib_call_init_function (vm, ip4_lookup_init))) return error; if ((error = vlib_call_init_function (vm, ip6_lookup_init))) return error; /* * Registrations */ /* Register with IP */ pi = ip_get_protocol_info (im, IP_PROTOCOL_TCP); if (pi == 0) return clib_error_return (0, "TCP protocol info AWOL"); pi->format_header = format_tcp_header; pi->unformat_pg_edit = unformat_pg_tcp_header; ip4_register_protocol (IP_PROTOCOL_TCP, tcp4_input_node.index); ip6_register_protocol (IP_PROTOCOL_TCP, tcp6_input_node.index); /* Register as transport with session layer */ session_register_transport (TRANSPORT_PROTO_TCP, 1, &tcp_proto); session_register_transport (TRANSPORT_PROTO_TCP, 0, &tcp_proto); /* * Initialize data structures */ num_threads = 1 /* main thread */ + vtm->n_threads; vec_validate (tm->connections, num_threads - 1); /* * Preallocate connections. Assume that thread 0 won't * use preallocated threads when running multi-core */ if (num_threads == 1) { thread = 0; preallocated_connections_per_thread = tm->preallocated_connections; } else { thread = 1; preallocated_connections_per_thread = tm->preallocated_connections / (num_threads - 1); } for (; thread < num_threads; thread++) { if (preallocated_connections_per_thread) pool_init_fixed (tm->connections[thread], preallocated_connections_per_thread); } /* * Use a preallocated half-open connection pool? */ if (tm->preallocated_half_open_connections) pool_init_fixed (tm->half_open_connections, tm->preallocated_half_open_connections); /* Initialize per worker thread tx buffers (used for control messages) */ vec_validate (tm->tx_buffers, num_threads - 1); /* Initialize timer wheels */ vec_validate (tm->timer_wheels, num_threads - 1); tcp_initialize_timer_wheels (tm); /* Initialize clocks per tick for TCP timestamp. Used to compute * monotonically increasing timestamps. */ tm->tstamp_ticks_per_clock = vm->clib_time.seconds_per_clock / TCP_TSTAMP_RESOLUTION; if (tm->local_endpoints_table_buckets == 0) tm->local_endpoints_table_buckets = 250000; if (tm->local_endpoints_table_memory == 0) tm->local_endpoints_table_memory = 512 << 20; clib_bihash_init_24_8 (&tm->local_endpoints_table, "local endpoint table", tm->local_endpoints_table_buckets, tm->local_endpoints_table_memory); /* Initialize [port-allocator] random number seed */ tm->port_allocator_seed = (u32) clib_cpu_time_now (); if (num_threads > 1) { clib_spinlock_init (&tm->half_open_lock); clib_spinlock_init (&tm->local_endpoints_lock); } vec_validate (tm->tx_frames[0], num_threads - 1); vec_validate (tm->tx_frames[1], num_threads - 1); vec_validate (tm->ip_lookup_tx_frames[0], num_threads - 1); vec_validate (tm->ip_lookup_tx_frames[1], num_threads - 1); tm->bytes_per_buffer = vlib_buffer_free_list_buffer_size (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX); vec_validate (tm->time_now, num_threads - 1); return error; } clib_error_t * vnet_tcp_enable_disable (vlib_main_t * vm, u8 is_en) { if (is_en) { if (tcp_main.is_enabled) return 0; return tcp_main_enable (vm); } else { tcp_main.is_enabled = 0; } return 0; } clib_error_t * tcp_init (vlib_main_t * vm) { tcp_main_t *tm = vnet_get_tcp_main (); tm->is_enabled = 0; tcp_api_reference (); return 0; } VLIB_INIT_FUNCTION (tcp_init); static clib_error_t * tcp_config_fn (vlib_main_t * vm, unformat_input_t * input) { tcp_main_t *tm = vnet_get_tcp_main (); u64 tmp; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "preallocated-connections %d", &tm->preallocated_connections)) ; else if (unformat (input, "preallocated-half-open-connections %d", &tm->preallocated_half_open_connections)) ; else if (unformat (input, "local-endpoints-table-memory %U", unformat_memory_size, &tmp)) { if (tmp >= 0x100000000) return clib_error_return (0, "memory size %llx (%lld) too large", tmp, tmp); tm->local_endpoints_table_memory = tmp; } else if (unformat (input, "local-endpoints-table-buckets %d", &tm->local_endpoints_table_buckets)) ; else return clib_error_return (0, "unknown input `%U'", format_unformat_error, input); } return 0; } VLIB_CONFIG_FUNCTION (tcp_config_fn, "tcp"); /** * \brief Configure an ipv4 source address range * @param vm vlib_main_t pointer * @param start first ipv4 address in the source address range * @param end last ipv4 address in the source address range * @param table_id VRF / table ID, 0 for the default FIB * @return 0 if all OK, else an error indication from api_errno.h */ int tcp_configure_v4_source_address_range (vlib_main_t * vm, ip4_address_t * start, ip4_address_t * end, u32 table_id) { tcp_main_t *tm = vnet_get_tcp_main (); vnet_main_t *vnm = vnet_get_main (); u32 start_host_byte_order, end_host_byte_order; fib_prefix_t prefix; vnet_sw_interface_t *si; fib_node_index_t fei; u32 fib_index = 0; u32 sw_if_index; int rv; int vnet_proxy_arp_add_del (ip4_address_t * lo_addr, ip4_address_t * hi_addr, u32 fib_index, int is_del); memset (&prefix, 0, sizeof (prefix)); fib_index = fib_table_find (FIB_PROTOCOL_IP4, table_id); if (fib_index == ~0) return VNET_API_ERROR_NO_SUCH_FIB; start_host_byte_order = clib_net_to_host_u32 (start->as_u32); end_host_byte_order = clib_net_to_host_u32 (end->as_u32); /* sanity check for reversed args or some such */ if ((end_host_byte_order - start_host_byte_order) > (10 << 10)) return VNET_API_ERROR_INVALID_ARGUMENT; /* Lookup the last address, to identify the interface involved */ prefix.fp_len = 32; prefix.fp_proto = FIB_PROTOCOL_IP4; memcpy (&prefix.fp_addr.ip4, end, sizeof (ip4_address_t)); fei = fib_table_lookup (fib_index, &prefix); /* Couldn't find route to destination. Bail out. */ if (fei == FIB_NODE_INDEX_INVALID) return VNET_API_ERROR_NEXT_HOP_NOT_IN_FIB; sw_if_index = fib_entry_get_resolving_interface (fei); /* Enable proxy arp on the interface */ si = vnet_get_sw_interface (vnm, sw_if_index); si->flags |= VNET_SW_INTERFACE_FLAG_PROXY_ARP; /* Configure proxy arp across the range */ rv = vnet_proxy_arp_add_del (start, end, fib_index, 0 /* is_del */ ); if (rv) return rv; do { dpo_id_t dpo = DPO_INVALID; vec_add1 (tm->ip4_src_addresses, start[0]); /* Add local adjacencies for the range */ receive_dpo_add_or_lock (DPO_PROTO_IP4, ~0 /* sw_if_index */ , NULL, &dpo); prefix.fp_len = 32; prefix.fp_proto = FIB_PROTOCOL_IP4; prefix.fp_addr.ip4.as_u32 = start->as_u32; fib_table_entry_special_dpo_update (fib_index, &prefix, FIB_SOURCE_API, FIB_ENTRY_FLAG_EXCLUSIVE, &dpo); dpo_reset (&dpo); start_host_byte_order++; start->as_u32 = clib_host_to_net_u32 (start_host_byte_order); } while (start_host_byte_order <= end_host_byte_order); return 0; } /** * \brief Configure an ipv6 source address range * @param vm vlib_main_t pointer * @param start first ipv6 address in the source address range * @param end last ipv6 address in the source address range * @param table_id VRF / table ID, 0 for the default FIB * @return 0 if all OK, else an error indication from api_errno.h */ int tcp_configure_v6_source_address_range (vlib_main_t * vm, ip6_address_t * start, ip6_address_t * end, u32 table_id) { tcp_main_t *tm = vnet_get_tcp_main (); fib_prefix_t prefix; u32 fib_index = 0; fib_node_index_t fei; u32 sw_if_index; memset (&prefix, 0, sizeof (prefix)); fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id); if (fib_index == ~0) return VNET_API_ERROR_NO_SUCH_FIB; while (1) { int i; ip6_address_t tmp; dpo_id_t dpo = DPO_INVALID; /* Remember this address */ vec_add1 (tm->ip6_src_addresses, start[0]); /* Lookup the prefix, to identify the interface involved */ prefix.fp_len = 128; prefix.fp_proto = FIB_PROTOCOL_IP6; memcpy (&prefix.fp_addr.ip6, start, sizeof (ip6_address_t)); fei = fib_table_lookup (fib_index, &prefix); /* Couldn't find route to destination. Bail out. */ if (fei == FIB_NODE_INDEX_INVALID) return VNET_API_ERROR_NEXT_HOP_NOT_IN_FIB; sw_if_index = fib_entry_get_resolving_interface (fei); if (sw_if_index == (u32) ~ 0) return VNET_API_ERROR_NO_MATCHING_INTERFACE; /* Add a proxy neighbor discovery entry for this address */ ip6_neighbor_proxy_add_del (sw_if_index, start, 0 /* is_del */ ); /* Add a receive adjacency for this address */ receive_dpo_add_or_lock (DPO_PROTO_IP6, ~0 /* sw_if_index */ , NULL, &dpo); fib_table_entry_special_dpo_update (fib_index, &prefix, FIB_SOURCE_API, FIB_ENTRY_FLAG_EXCLUSIVE, &dpo); dpo_reset (&dpo); /* Done with the entire range? */ if (!memcmp (start, end, sizeof (start[0]))) break; /* Increment the address. DGMS. */ tmp = start[0]; for (i = 15; i >= 0; i--) { tmp.as_u8[i] += 1; if (tmp.as_u8[i] != 0) break; } start[0] = tmp; } return 0; } static clib_error_t * tcp_src_address (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd_arg) { ip4_address_t v4start, v4end; ip6_address_t v6start, v6end; u32 table_id = 0; int v4set = 0; int v6set = 0; int rv; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "%U - %U", unformat_ip4_address, &v4start, unformat_ip4_address, &v4end)) v4set = 1; else if (unformat (input, "%U", unformat_ip4_address, &v4start)) { memcpy (&v4end, &v4start, sizeof (v4start)); v4set = 1; } else if (unformat (input, "%U - %U", unformat_ip6_address, &v6start, unformat_ip6_address, &v6end)) v6set = 1; else if (unformat (input, "%U", unformat_ip6_address, &v6start)) { memcpy (&v6end, &v6start, sizeof (v4start)); v6set = 1; } else if (unformat (input, "fib-table %d", &table_id)) ; else break; } if (!v4set && !v6set) return clib_error_return (0, "at least one v4 or v6 address required"); if (v4set) { rv = tcp_configure_v4_source_address_range (vm, &v4start, &v4end, table_id); switch (rv) { case 0: break; case VNET_API_ERROR_NO_SUCH_FIB: return clib_error_return (0, "Invalid table-id %d", table_id); case VNET_API_ERROR_INVALID_ARGUMENT: return clib_error_return (0, "Invalid address range %U - %U", format_ip4_address, &v4start, format_ip4_address, &v4end); default: return clib_error_return (0, "error %d", rv); break; } } if (v6set) { rv = tcp_configure_v6_source_address_range (vm, &v6start, &v6end, table_id); switch (rv) { case 0: break; case VNET_API_ERROR_NO_SUCH_FIB: return clib_error_return (0, "Invalid table-id %d", table_id); default: return clib_error_return (0, "error %d", rv); break; } } return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (tcp_src_address_command, static) = { .path = "tcp src-address", .short_help = "tcp src-address <ip-addr> [- <ip-addr>] add src address range", .function = tcp_src_address, }; /* *INDENT-ON* */ static u8 * tcp_scoreboard_dump_trace (u8 * s, sack_scoreboard_t * sb) { #if TCP_SCOREBOARD_TRACE scoreboard_trace_elt_t *block; int i = 0; if (!sb->trace) return s; s = format (s, "scoreboard trace:"); vec_foreach (block, sb->trace) { s = format (s, "{%u, %u, %u, %u, %u}, ", block->start, block->end, block->ack, block->snd_una_max, block->group); if ((++i % 3) == 0) s = format (s, "\n"); } return s; #else return 0; #endif } static clib_error_t * tcp_show_scoreboard_trace_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd_arg) { transport_connection_t *tconn = 0; tcp_connection_t *tc; u8 *s = 0; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "%U", unformat_transport_connection, &tconn, TRANSPORT_PROTO_TCP)) ; else return clib_error_return (0, "unknown input `%U'", format_unformat_error, input); } if (!TCP_SCOREBOARD_TRACE) { vlib_cli_output (vm, "scoreboard tracing not enabled"); return 0; } tc = tcp_get_connection_from_transport (tconn); s = tcp_scoreboard_dump_trace (s, &tc->sack_sb); vlib_cli_output (vm, "%v", s); return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (tcp_show_scoreboard_trace_command, static) = { .path = "show tcp scoreboard trace", .short_help = "show tcp scoreboard trace <connection>", .function = tcp_show_scoreboard_trace_fn, }; /* *INDENT-ON* */ u8 * tcp_scoreboard_replay (u8 * s, tcp_connection_t * tc, u8 verbose) { int i, trace_len; scoreboard_trace_elt_t *trace; u32 next_ack, left, group, has_new_ack = 0; tcp_connection_t _dummy_tc, *dummy_tc = &_dummy_tc; sack_block_t *block; if (!tc) return s; memset (dummy_tc, 0, sizeof (*dummy_tc)); tcp_connection_timers_init (dummy_tc); scoreboard_init (&dummy_tc->sack_sb); dummy_tc->rcv_opts.flags |= TCP_OPTS_FLAG_SACK; #if TCP_SCOREBOARD_TRACE trace = tc->sack_sb.trace; trace_len = vec_len (tc->sack_sb.trace); #else trace = 0; trace_len = 0; #endif for (i = 0; i < trace_len; i++) { if (trace[i].ack != 0) { dummy_tc->snd_una = trace[i].ack - 1448; dummy_tc->snd_una_max = trace[i].ack; } } left = 0; while (left < trace_len) { group = trace[left].group; vec_reset_length (dummy_tc->rcv_opts.sacks); has_new_ack = 0; while (trace[left].group == group) { if (trace[left].ack != 0) { if (verbose) s = format (s, "Adding ack %u, snd_una_max %u, segs: ", trace[left].ack, trace[left].snd_una_max); dummy_tc->snd_una_max = trace[left].snd_una_max; next_ack = trace[left].ack; has_new_ack = 1; } else { if (verbose) s = format (s, "[%u, %u], ", trace[left].start, trace[left].end); vec_add2 (dummy_tc->rcv_opts.sacks, block, 1); block->start = trace[left].start; block->end = trace[left].end; } left++; } /* Push segments */ tcp_rcv_sacks (dummy_tc, next_ack); if (has_new_ack) dummy_tc->snd_una = next_ack + dummy_tc->sack_sb.snd_una_adv; if (verbose) s = format (s, "result: %U", format_tcp_scoreboard, &dummy_tc->sack_sb); } s = format (s, "result: %U", format_tcp_scoreboard, &dummy_tc->sack_sb); return s; } static clib_error_t * tcp_scoreboard_trace_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd_arg) { transport_connection_t *tconn = 0; tcp_connection_t *tc = 0; u8 *str = 0; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "%U", unformat_transport_connection, &tconn, TRANSPORT_PROTO_TCP)) ; else return clib_error_return (0, "unknown input `%U'", format_unformat_error, input); } if (!TCP_SCOREBOARD_TRACE) { vlib_cli_output (vm, "scoreboard tracing not enabled"); return 0; } tc = tcp_get_connection_from_transport (tconn); if (!tc) { vlib_cli_output (vm, "connection not found"); return 0; } str = tcp_scoreboard_replay (str, tc, 1); vlib_cli_output (vm, "%v", str); return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (tcp_replay_scoreboard_command, static) = { .path = "tcp replay scoreboard", .short_help = "tcp replay scoreboard <connection>", .function = tcp_scoreboard_trace_fn, }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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