* 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, ip46_address_t * ip,
- u16 port_host_byte_order, u8 is_ip4)
+tcp_connection_bind (u32 session_index, transport_endpoint_t * lcl)
{
tcp_main_t *tm = &tcp_main;
tcp_connection_t *listener;
+ void *iface_ip;
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 (port_host_byte_order);
+ listener->c_lcl_port = lcl->port;
- if (is_ip4)
- {
- listener->c_lcl_ip4.as_u32 = ip->ip4.as_u32;
- listener->c_is_ip4 = 1;
- listener->c_proto = SESSION_TYPE_IP4_TCP;
- }
- else
+ /* If we are provided a sw_if_index, bind using one of its ips */
+ if (ip_is_zero (&lcl->ip, 1) && lcl->sw_if_index != ENDPOINT_INVALID_INDEX)
{
- clib_memcpy (&listener->c_lcl_ip6, &ip->ip6, sizeof (ip6_address_t));
- listener->c_proto = SESSION_TYPE_IP6_TCP;
+ if ((iface_ip = ip_interface_get_first_ip (lcl->sw_if_index,
+ lcl->is_ip4)))
+ ip_set (&lcl->ip, iface_ip, lcl->is_ip4);
}
-
+ ip_copy (&listener->c_lcl_ip, &lcl->ip, lcl->is_ip4);
+ listener->c_is_ip4 = lcl->is_ip4;
+ listener->c_proto = TRANSPORT_PROTO_TCP;
listener->c_s_index = session_index;
+ listener->c_fib_index = lcl->fib_index;
listener->state = TCP_STATE_LISTEN;
tcp_connection_timers_init (listener);
}
u32
-tcp_session_bind_ip4 (u32 session_index, ip46_address_t * ip,
- u16 port_host_byte_order)
-{
- return tcp_connection_bind (session_index, ip, port_host_byte_order, 1);
-}
-
-u32
-tcp_session_bind_ip6 (u32 session_index, ip46_address_t * ip,
- u16 port_host_byte_order)
+tcp_session_bind (u32 session_index, transport_endpoint_t * tep)
{
- return tcp_connection_bind (session_index, ip, port_host_byte_order, 0);
+ return tcp_connection_bind (session_index, tep);
}
static void
return &tc->connection;
}
+/**
+ * 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.
*
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,
- tc->c_lcl_port);
-
- /*XXX lock */
- if (tepi != TRANSPORT_ENDPOINT_INVALID_INDEX)
- {
- tep = pool_elt_at_index (tm->local_endpoints, tepi);
- transport_endpoint_table_del (&tm->local_endpoints_table, tep);
- pool_put (tm->local_endpoints, tep);
- }
-
- /* Make sure all timers are cleared */
- tcp_connection_timers_reset (tc);
+ transport_endpoint_cleanup (TRANSPORT_PROTO_TCP, &tc->c_lcl_ip,
+ tc->c_lcl_port);
- /* Check if half-open */
+ /* Check if connection is not yet fully established */
if (tc->state == TCP_STATE_SYN_SENT)
{
- /* Poison the entry */
- if (CLIB_DEBUG > 0)
- memset (tc, 0xFA, sizeof (*tc));
- pool_put (tm->half_open_connections, tc);
+ /* 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));
tcp_connection_cleanup (tc);
}
-/**
- * Cleanup half-open connection
- */
-void
-tcp_half_open_connection_del (tcp_connection_t * tc)
-{
- tcp_main_t *tm = vnet_get_tcp_main ();
- if (CLIB_DEBUG)
- memset (tc, 0xFA, sizeof (*tc));
- clib_spinlock_lock (&tm->half_open_lock);
- pool_put (tm->half_open_connections, tc);
- clib_spinlock_unlock (&tm->half_open_lock);
-}
-
tcp_connection_t *
tcp_connection_new (u8 thread_index)
{
tcp_connection_cleanup (tc);
break;
case TCP_STATE_SYN_SENT:
- /* XXX remove sst from call */
- stream_session_connect_notify (&tc->connection, tc->connection.proto,
- 1 /* fail */ );
+ session_stream_connect_notify (&tc->connection, 1 /* fail */ );
tcp_connection_cleanup (tc);
break;
case TCP_STATE_ESTABLISHED:
+ stream_session_reset_notify (&tc->connection);
+ /* fall through */
case TCP_STATE_CLOSE_WAIT:
case TCP_STATE_FIN_WAIT_1:
case TCP_STATE_FIN_WAIT_2:
/* 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_set (tc, TCP_TIMER_WAITCLOSE, TCP_CLEANUP_TIME);
+ tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_CLEANUP_TIME);
break;
case TCP_STATE_CLOSED:
return;
{
TCP_EVT_DBG (TCP_EVT_CLOSE, tc);
- /* Send FIN if needed */
- if (tc->state == TCP_STATE_ESTABLISHED
- || tc->state == TCP_STATE_SYN_RCVD || tc->state == TCP_STATE_CLOSE_WAIT)
- tcp_send_fin (tc);
-
- /* Switch state */
- if (tc->state == TCP_STATE_ESTABLISHED || tc->state == TCP_STATE_SYN_RCVD)
- tc->state = TCP_STATE_FIN_WAIT_1;
- else if (tc->state == TCP_STATE_SYN_SENT)
- tc->state = TCP_STATE_CLOSED;
- else if (tc->state == TCP_STATE_CLOSE_WAIT)
- tc->state = TCP_STATE_LAST_ACK;
+ /* 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_connection_timers_reset (tc);
+ tcp_send_fin (tc);
+ tc->state = TCP_STATE_LAST_ACK;
+ tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_2MSL_TIME);
+ break;
+ case TCP_STATE_FIN_WAIT_1:
+ tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_2MSL_TIME);
+ break;
+ default:
+ TCP_DBG ("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
+ if (!tcp_timer_is_active (tc, TCP_TIMER_WAITCLOSE)
&& tc->state == TCP_STATE_CLOSED)
tcp_connection_del (tc);
}
{
tcp_connection_t *tc;
tc = tcp_connection_get (conn_index, thread_index);
+ tcp_connection_timers_reset (tc);
/* Wait for the session tx events to clear */
tc->state = TCP_STATE_CLOSED;
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 */ ,
- ({
- return ip_interface_address_get_address (lm6, ia);
- }));
- /* *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 (tcp_main_t * tm, ip46_address_t * ip)
-{
- transport_endpoint_t *tep;
- u32 time_now, tei;
- u16 min = 1024, max = 65535; /* XXX configurable ? */
- int tries;
-
- tries = max - min;
- time_now = tcp_time_now ();
-
- /* Only support active opens from thread 0 */
- ASSERT (vlib_get_thread_index () == 0);
-
- /* Start at random point or max */
- pool_get (tm->local_endpoints, tep);
- clib_memcpy (&tep->ip, ip, sizeof (*ip));
-
- /* Search for first free slot */
- for (; tries >= 0; tries--)
- {
- u16 port = 0;
-
- /* Find a port in the specified range */
- while (1)
- {
- port = random_u32 (&time_now) & PORT_MASK;
- if (PREDICT_TRUE (port >= min && port < max))
- break;
- }
-
- tep->port = port;
-
- /* Look it up */
- tei = transport_endpoint_lookup (&tm->local_endpoints_table, &tep->ip,
- tep->port);
- /* If not found, we're done */
- if (tei == TRANSPORT_ENDPOINT_INVALID_INDEX)
- {
- transport_endpoint_table_add (&tm->local_endpoints_table, tep,
- tep - tm->local_endpoints);
- return tep->port;
- }
- }
- /* No free ports */
- pool_put (tm->local_endpoints, tep);
- return -1;
-}
-
/**
* Initialize all connection timers as invalid
*/
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;
- return fib_table_lookup (0, &prefix);
+ fib_index = fib_table_find (prefix.fp_proto, tc->c_fib_index);
+ return fib_table_lookup (fib_index, &prefix);
}
static int
}
#endif /* 0 */
+/**
+ * Initialize connection send variables.
+ */
+void
+tcp_init_snd_vars (tcp_connection_t * tc)
+{
+ u32 time_now;
+
+ /*
+ * We use the time to randomize iss and for setting up the initial
+ * timestamp. Make sure it's updated otherwise syn and ack in the
+ * handshake may make it look as if time has flown in the opposite
+ * direction for us.
+ */
+ tcp_set_time_now (vlib_get_thread_index ());
+ 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
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 (ip46_address_t * rmt_addr, u16 rmt_port, u8 is_ip4)
+static int
+tcp_alloc_custom_local_endpoint (tcp_main_t * tm, ip46_address_t * lcl_addr,
+ u16 * lcl_port, u8 is_ip4)
{
- 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;
- 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_addr, sizeof (*rmt_addr));
- prefix.fp_proto = is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
- prefix.fp_len = is_ip4 ? 32 : 128;
-
- fei = fib_table_lookup (0, &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_addr, IP46_TYPE_IP4);
- return -1;
- }
-
+ int index, port;
if (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;
- }
+ 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
{
- 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);
- clib_memcpy (&lcl_addr.ip6, ip6, sizeof (*ip6));
- }
+ 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_address_t));
}
-
- /* Allocate source port */
- lcl_port = tcp_allocate_local_port (tm, &lcl_addr);
- if (lcl_port < 1)
+ port = transport_alloc_local_port (TRANSPORT_PROTO_TCP, lcl_addr);
+ if (port < 1)
{
clib_warning ("Failed to allocate src port");
return -1;
}
+ *lcl_port = port;
+ return 0;
+}
+
+int
+tcp_connection_open (transport_endpoint_t * rmt)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ tcp_connection_t *tc;
+ ip46_address_t lcl_addr;
+ u16 lcl_port;
+ int rv;
/*
- * Create connection and send SYN
+ * Allocate local endpoint
*/
+ if ((rmt->is_ip4 && vec_len (tm->ip4_src_addresses))
+ || (!rmt->is_ip4 && vec_len (tm->ip6_src_addresses)))
+ rv = tcp_alloc_custom_local_endpoint (tm, &lcl_addr, &lcl_port,
+ rmt->is_ip4);
+ else
+ rv = transport_alloc_local_endpoint (TRANSPORT_PROTO_TCP,
+ rmt, &lcl_addr, &lcl_port);
- pool_get (tm->half_open_connections, tc);
- memset (tc, 0, sizeof (*tc));
+ if (rv)
+ return -1;
- clib_memcpy (&tc->c_rmt_ip, rmt_addr, 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);
+ /*
+ * Create connection and send SYN
+ */
+ clib_spinlock_lock_if_init (&tm->half_open_lock);
+ tc = tcp_half_open_connection_new ();
+ ip_copy (&tc->c_rmt_ip, &rmt->ip, rmt->is_ip4);
+ ip_copy (&tc->c_lcl_ip, &lcl_addr, rmt->is_ip4);
+ tc->c_rmt_port = rmt->port;
tc->c_lcl_port = clib_host_to_net_u16 (lcl_port);
- tc->c_c_index = tc - tm->half_open_connections;
- tc->c_is_ip4 = is_ip4;
- tc->c_proto = is_ip4 ? SESSION_TYPE_IP4_TCP : SESSION_TYPE_IP6_TCP;
-
+ tc->c_is_ip4 = rmt->is_ip4;
+ tc->c_proto = TRANSPORT_PROTO_TCP;
+ tc->c_fib_index = rmt->fib_index;
/* 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_ip4 (ip46_address_t * addr, u16 port)
-{
- return tcp_connection_open (addr, port, 1);
-}
-
-int
-tcp_session_open_ip6 (ip46_address_t * addr, u16 port)
+tcp_session_open (transport_endpoint_t * tep)
{
- return tcp_connection_open (addr, port, 0);
+ return tcp_connection_open (tep);
}
const char *tcp_dbg_evt_str[] = {
return s;
}
+const char *tcp_connection_flags_str[] = {
+#define _(sym, str) str,
+ foreach_tcp_connection_flag
+#undef _
+};
+
+u8 *
+format_tcp_connection_flags (u8 * s, va_list * args)
+{
+ tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
+ int i, last = -1;
+
+ for (i = 0; i < TCP_CONN_N_FLAG_BITS; i++)
+ if (tc->flags & (1 << i))
+ last = i;
+ for (i = 0; i < last; i++)
+ {
+ if (tc->flags & (1 << i))
+ s = format (s, "%s, ", tcp_connection_flags_str[i]);
+ }
+ if (last >= 0)
+ s = format (s, "%s", tcp_connection_flags_str[last]);
+ return s;
+}
+
const char *tcp_conn_timers[] = {
#define _(sym, str) str,
foreach_tcp_timer
format_tcp_vars (u8 * s, va_list * args)
{
tcp_connection_t *tc = va_arg (*args, tcp_connection_t *);
+ s = format (s, " flags: %U timers: %U\n", format_tcp_connection_flags, tc,
+ format_tcp_timers, tc);
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);
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_snd_space (tc),
+ 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",
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);
+ if (tc->state >= TCP_STATE_ESTABLISHED)
+ 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);
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);
+ s = format (s, "\n%U", format_tcp_vars, tc);
}
return s;
if (tc)
s = format (s, "%U", format_tcp_connection, tc, verbose);
else
- s = format (s, "empty");
+ s = format (s, "empty\n");
return s;
}
format_tcp_sack_hole (u8 * s, va_list * args)
{
sack_scoreboard_hole_t *hole = va_arg (*args, sack_scoreboard_hole_t *);
- s = format (s, "[%u, %u]", hole->start, hole->end);
+ 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;
}
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);
while (hole)
{
- s = format (s, "%U", format_tcp_sack_hole, hole);
+ s = format (s, "%U", format_tcp_sack_hole, hole, tc);
hole = scoreboard_next_hole (sb, hole);
}
return tc->snd_wnd <= snd_space ? tc->snd_wnd : 0;
}
- /* If we can't write at least a segment, don't try at all */
+ /* 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))
- {
- if (snd_space > clib_min (tc->mss, tc->rcv_opts.mss) - TCP_HDR_LEN_MAX)
- return snd_space;
- return 0;
- }
+ return snd_space < tc->cwnd ? 0 : snd_space;
/* round down to mss multiple */
return snd_space - (snd_space % tc->snd_mss);
if (PREDICT_TRUE (tcp_in_cong_recovery (tc) == 0))
{
- snd_space = tcp_available_snd_space (tc);
+ 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 (tcp_in_recovery (tc))
{
tc->snd_nxt = tc->snd_una_max;
- snd_space = tcp_available_wnd (tc) - tc->snd_rxt_bytes
+ 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);
}
- /* If in fast recovery, send 1 SMSS if wnd allows */
- if (tcp_in_fastrecovery (tc)
- && tcp_available_snd_space (tc) && !tcp_fastrecovery_sent_1_smss (tc))
+ /* 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;
}
tcp_session_send_space (transport_connection_t * trans_conn)
{
tcp_connection_t *tc = (tcp_connection_t *) trans_conn;
- return tcp_snd_space (tc);
+ return clib_min (tcp_snd_space (tc),
+ tc->snd_wnd - (tc->snd_nxt - tc->snd_una));
}
i32
return (tc->snd_nxt - tc->snd_una);
}
-/* *INDENT-OFF* */
-const static transport_proto_vft_t tcp4_proto = {
- .bind = tcp_session_bind_ip4,
- .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_ip4,
- .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,
-};
+void
+tcp_update_time (f64 now, u8 thread_index)
+{
+ tcp_set_time_now (thread_index);
+ tw_timer_expire_timers_16t_2w_512sl (&tcp_main.timer_wheels[thread_index],
+ now);
+ tcp_flush_frames_to_output (thread_index);
+}
-const static transport_proto_vft_t tcp6_proto = {
- .bind = tcp_session_bind_ip6,
+/* *INDENT-OFF* */
+const static transport_proto_vft_t tcp_proto = {
+ .enable = vnet_tcp_enable_disable,
+ .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_ip6,
+ .open = tcp_session_open,
.close = tcp_session_close,
.cleanup = tcp_session_cleanup,
.send_mss = tcp_session_send_mss,
.send_space = tcp_session_send_space,
+ .update_time = tcp_update_time,
.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,
+ .tx_type = TRANSPORT_TX_PEEK,
+ .service_type = TRANSPORT_SERVICE_VC,
};
/* *INDENT-ON* */
tcp_timer_establish_handler (u32 conn_index)
{
tcp_connection_t *tc;
- u8 sst;
tc = tcp_half_open_connection_get (conn_index);
+ if (tc)
+ {
+ ASSERT (tc->state == TCP_STATE_SYN_SENT);
+ session_stream_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;
-
- ASSERT (tc->state == TCP_STATE_SYN_SENT);
-
- sst = tc->c_is_ip4 ? SESSION_TYPE_IP4_TCP : SESSION_TYPE_IP6_TCP;
- stream_session_connect_notify (&tc->connection, sst, 1 /* fail */ );
-
tcp_connection_cleanup (tc);
}
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
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, i;
+ 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;
* 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);
-
- /* Register as transport with URI */
- session_register_transport (SESSION_TYPE_IP4_TCP, &tcp4_proto);
- session_register_transport (SESSION_TYPE_IP6_TCP, &tcp6_proto);
+ ip6_register_protocol (IP_PROTOCOL_TCP, tcp6_input_node.index);
/*
* Initialize data structures
vec_validate (tm->connections, num_threads - 1);
/*
- * Preallocate connections
+ * Preallocate connections. Assume that thread 0 won't
+ * use preallocated threads when running multi-core
*/
- for (thread = 0; thread < num_threads; thread++)
+ if (num_threads == 1)
{
- for (i = 0; i < tm->preallocated_connections; i++)
- pool_get (tm->connections[thread], tc);
-
- for (i = 0; i < tm->preallocated_connections; i++)
- pool_put_index (tm->connections[thread], i);
+ 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);
}
/*
- * Preallocate half-open connections
+ * Use a preallocated half-open connection pool?
*/
- for (i = 0; i < tm->preallocated_half_open_connections; i++)
- pool_get (tm->half_open_connections, tc);
-
- for (i = 0; i < tm->preallocated_half_open_connections; i++)
- pool_put_index (tm->half_open_connections, i);
+ 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);
tm->tstamp_ticks_per_clock = vm->clib_time.seconds_per_clock
/ TCP_TSTAMP_RESOLUTION;
- clib_bihash_init_24_8 (&tm->local_endpoints_table, "local endpoint table",
- 200000 /* $$$$ config parameter nbuckets */ ,
- (64 << 20) /*$$$ config parameter table size */ );
- clib_spinlock_init (&tm->half_open_lock);
+ if (num_threads > 1)
+ {
+ clib_spinlock_init (&tm->half_open_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;
}
return 0;
}
+void
+tcp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add)
+{
+ tcp_main_t *tm = &tcp_main;
+ if (is_ip4)
+ tm->punt_unknown4 = is_add;
+ else
+ tm->punt_unknown6 = is_add;
+}
+
clib_error_t *
tcp_init (vlib_main_t * vm)
{
tcp_main_t *tm = vnet_get_tcp_main ();
+ ip_main_t *im = &ip_main;
+ ip_protocol_info_t *pi;
- tm->vnet_main = vnet_get_main ();
+ /* Session layer, and by implication tcp, are disabled by default */
tm->is_enabled = 0;
+ /* Register with IP for header parsing */
+ 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;
+
+ /* Register as transport with session layer */
+ transport_register_protocol (TRANSPORT_PROTO_TCP, &tcp_proto,
+ FIB_PROTOCOL_IP4, tcp4_output_node.index);
+ transport_register_protocol (TRANSPORT_PROTO_TCP, &tcp_proto,
+ FIB_PROTOCOL_IP6, tcp6_output_node.index);
+
+ 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)
{
else if (unformat (input, "preallocated-half-open-connections %d",
&tm->preallocated_half_open_connections))
;
+ else if (unformat (input, "buffer-fail-fraction %f",
+ &tm->buffer_fail_fraction))
+ ;
else
return clib_error_return (0, "unknown input `%U'",
format_unformat_error, input);
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)
{
- tcp_main_t *tm = vnet_get_tcp_main ();
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)
{
v4set = 1;
}
else if (unformat (input, "%U - %U", unformat_ip6_address, &v6start,
- unformat_ip4_address, &v6end))
+ unformat_ip6_address, &v6end))
v6set = 1;
else if (unformat (input, "%U", unformat_ip6_address, &v6start))
{
- memcpy (&v6end, &v6start, sizeof (v4start));
+ memcpy (&v6end, &v6start, sizeof (v6start));
v6set = 1;
}
+ else if (unformat (input, "fib-table %d", &table_id))
+ ;
else
break;
}
if (v4set)
{
- u32 tmp;
-
- do
+ rv = tcp_configure_v4_source_address_range (vm, &v4start, &v4end,
+ table_id);
+ switch (rv)
{
- vec_add1 (tm->ip4_src_addresses, v4start);
- tmp = clib_net_to_host_u32 (v4start.as_u32);
- tmp++;
- v4start.as_u32 = clib_host_to_net_u32 (tmp);
+ 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;
}
- while (clib_host_to_net_u32 (v4start.as_u32) <=
- clib_host_to_net_u32 (v4end.as_u32));
}
if (v6set)
{
- clib_warning ("v6 src address list unimplemented...");
+ 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-ON* */
+static clib_error_t *
+show_tcp_punt_fn (vlib_main_t * vm, unformat_input_t * input,
+ vlib_cli_command_t * cmd_arg)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ if (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ return clib_error_return (0, "unknown input `%U'", format_unformat_error,
+ input);
+ vlib_cli_output (vm, "IPv4 TCP punt: %s",
+ tm->punt_unknown4 ? "enabled" : "disabled");
+ vlib_cli_output (vm, "IPv6 TCP punt: %s",
+ tm->punt_unknown6 ? "enabled" : "disabled");
+ return 0;
+}
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (show_tcp_punt_command, static) =
+{
+ .path = "show tcp punt",
+ .short_help = "show tcp punt",
+ .function = show_tcp_punt_fn,
+};
+/* *INDENT-ON* */
+
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff