/*
- * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Copyright (c) 2016-2020 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:
* limitations under the License.
*/
-/** @file
- udp state machine, etc.
-*/
-
#include <vnet/udp/udp.h>
#include <vnet/session/session.h>
#include <vnet/dpo/load_balance.h>
#include <vnet/fib/ip4_fib.h>
+#include <vppinfra/sparse_vec.h>
+
+udp_main_t udp_main;
+
+static void
+udp_connection_register_port (vlib_main_t * vm, u16 lcl_port, u8 is_ip4)
+{
+ udp_main_t *um = &udp_main;
+ udp_dst_port_info_t *pi;
+ u16 *n;
+
+ pi = udp_get_dst_port_info (um, lcl_port, is_ip4);
+ if (!pi)
+ {
+ udp_add_dst_port (um, lcl_port, 0, is_ip4);
+ pi = udp_get_dst_port_info (um, lcl_port, is_ip4);
+ pi->n_connections = 1;
+ }
+ else
+ {
+ pi->n_connections += 1;
+ /* Do not return. The fact that the pi is valid does not mean
+ * it's up to date */
+ }
+
+ pi->node_index = is_ip4 ? udp4_input_node.index : udp6_input_node.index;
+ pi->next_index = um->local_to_input_edge[is_ip4];
+
+ /* Setup udp protocol -> next index sparse vector mapping. */
+ if (is_ip4)
+ n = sparse_vec_validate (um->next_by_dst_port4,
+ clib_host_to_net_u16 (lcl_port));
+ else
+ n = sparse_vec_validate (um->next_by_dst_port6,
+ clib_host_to_net_u16 (lcl_port));
+
+ n[0] = pi->next_index;
+}
+
+static void
+udp_connection_unregister_port (u16 lcl_port, u8 is_ip4)
+{
+ udp_main_t *um = &udp_main;
+ udp_dst_port_info_t *pi;
+
+ pi = udp_get_dst_port_info (um, lcl_port, is_ip4);
+ if (!pi)
+ return;
+
+ if (!pi->n_connections)
+ {
+ clib_warning ("no connections using port %u", lcl_port);
+ return;
+ }
+
+ if (!clib_atomic_sub_fetch (&pi->n_connections, 1))
+ udp_unregister_dst_port (0, lcl_port, is_ip4);
+}
+
+void
+udp_connection_share_port (u16 lcl_port, u8 is_ip4)
+{
+ udp_main_t *um = &udp_main;
+ udp_dst_port_info_t *pi;
+
+ /* Done without a lock but the operation is atomic. Writers to pi hash
+ * table and vector should be guarded by a barrier sync */
+ pi = udp_get_dst_port_info (um, lcl_port, is_ip4);
+ clib_atomic_fetch_add_rel (&pi->n_connections, 1);
+}
udp_connection_t *
udp_connection_alloc (u32 thread_index)
pool_get_aligned (um->connections[thread_index], uc,
CLIB_CACHE_LINE_BYTES);
}
- memset (uc, 0, sizeof (*uc));
+ clib_memset (uc, 0, sizeof (*uc));
uc->c_c_index = uc - um->connections[thread_index];
uc->c_thread_index = thread_index;
uc->c_proto = TRANSPORT_PROTO_UDP;
void
udp_connection_free (udp_connection_t * uc)
{
- pool_put (udp_main.connections[uc->c_thread_index], uc);
+ u32 thread_index = uc->c_thread_index;
if (CLIB_DEBUG)
- memset (uc, 0xFA, sizeof (*uc));
+ clib_memset (uc, 0xFA, sizeof (*uc));
+ pool_put (udp_main.connections[thread_index], uc);
+}
+
+static void
+udp_connection_cleanup (udp_connection_t * uc)
+{
+ transport_endpoint_cleanup (TRANSPORT_PROTO_UDP, &uc->c_lcl_ip,
+ uc->c_lcl_port);
+ udp_connection_unregister_port (clib_net_to_host_u16 (uc->c_lcl_port),
+ uc->c_is_ip4);
+ udp_connection_free (uc);
+}
+
+void
+udp_connection_delete (udp_connection_t * uc)
+{
+ session_transport_delete_notify (&uc->connection);
+ udp_connection_cleanup (uc);
}
-u32
+static u8
+udp_connection_port_used_extern (u16 lcl_port, u8 is_ip4)
+{
+ udp_main_t *um = vnet_get_udp_main ();
+ udp_dst_port_info_t *pi;
+
+ pi = udp_get_dst_port_info (um, lcl_port, is_ip4);
+ return (pi && !pi->n_connections
+ && udp_is_valid_dst_port (lcl_port, is_ip4));
+}
+
+static u16
+udp_default_mtu (udp_main_t * um, u8 is_ip4)
+{
+ u16 ip_hlen = is_ip4 ? sizeof (ip4_header_t) : sizeof (ip6_header_t);
+ return (um->default_mtu - sizeof (udp_header_t) - ip_hlen);
+}
+
+static u32
udp_session_bind (u32 session_index, transport_endpoint_t * lcl)
{
udp_main_t *um = vnet_get_udp_main ();
vlib_main_t *vm = vlib_get_main ();
+ transport_endpoint_cfg_t *lcl_ext;
udp_connection_t *listener;
- u32 node_index;
+ u16 lcl_port_ho;
void *iface_ip;
- udp_dst_port_info_t *pi;
- pi = udp_get_dst_port_info (um, lcl->port, lcl->is_ip4);
- if (pi)
- return -1;
+ lcl_port_ho = clib_net_to_host_u16 (lcl->port);
+
+ if (udp_connection_port_used_extern (lcl_port_ho, lcl->is_ip4))
+ {
+ clib_warning ("port already used");
+ return SESSION_E_PORTINUSE;
+ }
pool_get (um->listener_pool, listener);
- memset (listener, 0, sizeof (udp_connection_t));
+ clib_memset (listener, 0, sizeof (udp_connection_t));
listener->c_lcl_port = lcl->port;
listener->c_c_index = listener - um->listener_pool;
listener->c_proto = TRANSPORT_PROTO_UDP;
listener->c_s_index = session_index;
listener->c_fib_index = lcl->fib_index;
+ listener->mss = udp_default_mtu (um, listener->c_is_ip4);
+ listener->flags |= UDP_CONN_F_OWNS_PORT | UDP_CONN_F_LISTEN;
+ lcl_ext = (transport_endpoint_cfg_t *) lcl;
+ if (lcl_ext->transport_flags & TRANSPORT_CFG_F_CONNECTED)
+ listener->flags |= UDP_CONN_F_CONNECTED;
+ else
+ listener->c_flags |= TRANSPORT_CONNECTION_F_CLESS;
clib_spinlock_init (&listener->rx_lock);
- node_index = lcl->is_ip4 ? udp4_input_node.index : udp6_input_node.index;
- udp_register_dst_port (vm, clib_net_to_host_u16 (lcl->port), node_index,
- 1 /* is_ipv4 */ );
+ udp_connection_register_port (vm, lcl_port_ho, lcl->is_ip4);
return listener->c_c_index;
}
-u32
+static u32
udp_session_unbind (u32 listener_index)
{
- vlib_main_t *vm = vlib_get_main ();
-
+ udp_main_t *um = &udp_main;
udp_connection_t *listener;
+
listener = udp_listener_get (listener_index);
- udp_unregister_dst_port (vm, clib_net_to_host_u16 (listener->c_lcl_port),
- listener->c_is_ip4);
+ udp_connection_unregister_port (clib_net_to_host_u16 (listener->c_lcl_port),
+ listener->c_is_ip4);
+ pool_put (um->listener_pool, listener);
return 0;
}
-transport_connection_t *
+static transport_connection_t *
udp_session_get_listener (u32 listener_index)
{
udp_connection_t *us;
return &us->connection;
}
-u32
+static u32
udp_push_header (transport_connection_t * tc, vlib_buffer_t * b)
{
udp_connection_t *uc;
vlib_main_t *vm = vlib_get_main ();
- uc = udp_get_connection_from_transport (tc);
+ uc = udp_connection_from_transport (tc);
vlib_buffer_push_udp (b, uc->c_lcl_port, uc->c_rmt_port, 1);
if (tc->is_ip4)
- vlib_buffer_push_ip4 (vm, b, &uc->c_lcl_ip4, &uc->c_rmt_ip4,
- IP_PROTOCOL_UDP, 1);
+ vlib_buffer_push_ip4_custom (vm, b, &uc->c_lcl_ip4, &uc->c_rmt_ip4,
+ IP_PROTOCOL_UDP, 1 /* csum offload */ ,
+ 0 /* is_df */ );
else
- {
- ip6_header_t *ih;
- ih = vlib_buffer_push_ip6 (vm, b, &uc->c_lcl_ip6, &uc->c_rmt_ip6,
- IP_PROTOCOL_UDP);
- vnet_buffer (b)->l3_hdr_offset = (u8 *) ih - b->data;
- }
+ vlib_buffer_push_ip6 (vm, b, &uc->c_lcl_ip6, &uc->c_rmt_ip6,
+ IP_PROTOCOL_UDP);
vnet_buffer (b)->sw_if_index[VLIB_RX] = 0;
vnet_buffer (b)->sw_if_index[VLIB_TX] = uc->c_fib_index;
b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
+ if (PREDICT_FALSE (uc->flags & UDP_CONN_F_CLOSING))
+ {
+ if (!transport_max_tx_dequeue (&uc->connection))
+ udp_connection_delete (uc);
+ }
+
return 0;
}
-transport_connection_t *
+static transport_connection_t *
udp_session_get (u32 connection_index, u32 thread_index)
{
udp_connection_t *uc;
return 0;
}
-void
+static void
udp_session_close (u32 connection_index, u32 thread_index)
{
- vlib_main_t *vm = vlib_get_main ();
udp_connection_t *uc;
+
uc = udp_connection_get (connection_index, thread_index);
- if (uc)
- {
- udp_unregister_dst_port (vm, clib_net_to_host_u16 (uc->c_lcl_port),
- uc->c_is_ip4);
- stream_session_delete_notify (&uc->connection);
- udp_connection_free (uc);
- }
+ if (!uc)
+ return;
+
+ if (!transport_max_tx_dequeue (&uc->connection))
+ udp_connection_delete (uc);
+ else
+ uc->flags |= UDP_CONN_F_CLOSING;
}
-void
+static void
udp_session_cleanup (u32 connection_index, u32 thread_index)
{
udp_connection_t *uc;
uc = udp_connection_get (connection_index, thread_index);
- if (uc)
- udp_connection_free (uc);
-}
-
-u8 *
-format_udp_connection_id (u8 * s, va_list * args)
-{
- udp_connection_t *uc = va_arg (*args, udp_connection_t *);
if (!uc)
- return s;
- if (uc->c_is_ip4)
- s = format (s, "[#%d][%s] %U:%d->%U:%d", uc->c_thread_index, "U",
- format_ip4_address, &uc->c_lcl_ip4,
- clib_net_to_host_u16 (uc->c_lcl_port), format_ip4_address,
- &uc->c_rmt_ip4, clib_net_to_host_u16 (uc->c_rmt_port));
+ return;
+ if (uc->flags & UDP_CONN_F_MIGRATED)
+ udp_connection_free (uc);
else
- s = format (s, "[#%d][%s] %U:%d->%U:%d", uc->c_thread_index, "U",
- format_ip6_address, &uc->c_lcl_ip6,
- clib_net_to_host_u16 (uc->c_lcl_port), format_ip6_address,
- &uc->c_rmt_ip6, clib_net_to_host_u16 (uc->c_rmt_port));
- return s;
-}
-
-u8 *
-format_udp_connection (u8 * s, va_list * args)
-{
- udp_connection_t *uc = va_arg (*args, udp_connection_t *);
- u32 verbose = va_arg (*args, u32);
- if (!uc)
- return s;
- s = format (s, "%-50U", format_udp_connection_id, uc);
- if (verbose)
- {
- if (verbose == 1)
- s = format (s, "%-15s\n", "-");
- else
- s = format (s, "\n");
- }
- return s;
+ udp_connection_cleanup (uc);
}
-u8 *
-format_udp_session (u8 * s, va_list * args)
+static int
+udp_session_send_params (transport_connection_t * tconn,
+ transport_send_params_t * sp)
{
- u32 uci = va_arg (*args, u32);
- u32 thread_index = va_arg (*args, u32);
- u32 verbose = va_arg (*args, u32);
udp_connection_t *uc;
- uc = udp_connection_get (uci, thread_index);
- return format (s, "%U", format_udp_connection, uc, verbose);
-}
-
-u8 *
-format_udp_half_open_session (u8 * s, va_list * args)
-{
- clib_warning ("BUG");
- return 0;
-}
+ uc = udp_connection_from_transport (tconn);
-u8 *
-format_udp_listener_session (u8 * s, va_list * args)
-{
- u32 tci = va_arg (*args, u32);
- udp_connection_t *uc = udp_listener_get (tci);
- return format (s, "%U", format_udp_connection, uc);
-}
-
-u16
-udp_send_mss (transport_connection_t * t)
-{
- /* TODO figure out MTU of output interface */
- return 1460;
-}
-
-u32
-udp_send_space (transport_connection_t * t)
-{
/* No constraint on TX window */
- return ~0;
+ sp->snd_space = ~0;
+ /* TODO figure out MTU of output interface */
+ sp->snd_mss = uc->mss;
+ sp->tx_offset = 0;
+ sp->flags = 0;
+ return 0;
}
-int
-udp_open_connection (transport_endpoint_t * rmt)
+static int
+udp_open_connection (transport_endpoint_cfg_t * rmt)
{
- udp_main_t *um = vnet_get_udp_main ();
vlib_main_t *vm = vlib_get_main ();
- u32 thread_index = vlib_get_thread_index ();
- udp_connection_t *uc;
+ u32 thread_index = vm->thread_index;
+ udp_main_t *um = &udp_main;
ip46_address_t lcl_addr;
- u32 node_index;
+ udp_connection_t *uc;
u16 lcl_port;
+ int rv;
- if (transport_alloc_local_endpoint (TRANSPORT_PROTO_UDP, rmt, &lcl_addr,
- &lcl_port))
- return -1;
+ rv = transport_alloc_local_endpoint (TRANSPORT_PROTO_UDP, rmt, &lcl_addr,
+ &lcl_port);
+ if (rv)
+ {
+ if (rv != SESSION_E_PORTINUSE)
+ return rv;
+
+ if (udp_connection_port_used_extern (lcl_port, rmt->is_ip4))
+ return SESSION_E_PORTINUSE;
+
+ /* If port in use, check if 5-tuple is also in use */
+ if (session_lookup_connection (rmt->fib_index, &lcl_addr, &rmt->ip,
+ lcl_port, rmt->port, TRANSPORT_PROTO_UDP,
+ rmt->is_ip4))
+ return SESSION_E_PORTINUSE;
+
+ /* 5-tuple is available so increase lcl endpoint refcount and proceed
+ * with connection allocation */
+ transport_share_local_endpoint (TRANSPORT_PROTO_UDP, &lcl_addr,
+ lcl_port);
+ goto conn_alloc;
+ }
- while (udp_get_dst_port_info (um, lcl_port, rmt->is_ip4))
+ if (udp_is_valid_dst_port (lcl_port, rmt->is_ip4))
{
- lcl_port = transport_alloc_local_port (TRANSPORT_PROTO_UDP, &lcl_addr);
- if (lcl_port < 1)
+ /* If specific source port was requested abort */
+ if (rmt->peer.port)
+ return SESSION_E_PORTINUSE;
+
+ /* Try to find a port that's not used */
+ while (udp_is_valid_dst_port (lcl_port, rmt->is_ip4))
{
- clib_warning ("Failed to allocate src port");
- return -1;
+ lcl_port = transport_alloc_local_port (TRANSPORT_PROTO_UDP,
+ &lcl_addr);
+ if (lcl_port < 1)
+ return SESSION_E_PORTINUSE;
}
}
- node_index = rmt->is_ip4 ? udp4_input_node.index : udp6_input_node.index;
- udp_register_dst_port (vm, lcl_port, node_index, 1 /* is_ipv4 */ );
+conn_alloc:
+
+ udp_connection_register_port (vm, lcl_port, rmt->is_ip4);
/* We don't poll main thread if we have workers */
if (vlib_num_workers ())
uc->c_is_ip4 = rmt->is_ip4;
uc->c_proto = TRANSPORT_PROTO_UDP;
uc->c_fib_index = rmt->fib_index;
+ uc->mss = rmt->mss ? rmt->mss : udp_default_mtu (um, uc->c_is_ip4);
+ uc->flags |= UDP_CONN_F_OWNS_PORT;
+ if (rmt->transport_flags & TRANSPORT_CFG_F_CONNECTED)
+ uc->flags |= UDP_CONN_F_CONNECTED;
+ else
+ uc->c_flags |= TRANSPORT_CONNECTION_F_CLESS;
return uc->c_c_index;
}
-transport_connection_t *
+static transport_connection_t *
udp_session_get_half_open (u32 conn_index)
{
udp_connection_t *uc;
/* We don't poll main thread if we have workers */
thread_index = vlib_num_workers ()? 1 : 0;
uc = udp_connection_get (conn_index, thread_index);
+ if (!uc)
+ return 0;
return &uc->connection;
}
-/* *INDENT-OFF* */
-const static transport_proto_vft_t udp_proto = {
- .bind = udp_session_bind,
- .open = udp_open_connection,
- .unbind = udp_session_unbind,
- .push_header = udp_push_header,
- .get_connection = udp_session_get,
- .get_listener = udp_session_get_listener,
- .get_half_open = udp_session_get_half_open,
- .close = udp_session_close,
- .cleanup = udp_session_cleanup,
- .send_mss = udp_send_mss,
- .send_space = udp_send_space,
- .format_connection = format_udp_session,
- .format_half_open = format_udp_half_open_session,
- .format_listener = format_udp_listener_session,
- .tx_type = TRANSPORT_TX_DGRAM,
- .service_type = TRANSPORT_SERVICE_CL,
-};
-/* *INDENT-ON* */
+static u8 *
+format_udp_session (u8 * s, va_list * args)
+{
+ u32 uci = va_arg (*args, u32);
+ u32 thread_index = va_arg (*args, u32);
+ u32 verbose = va_arg (*args, u32);
+ udp_connection_t *uc;
+ uc = udp_connection_get (uci, thread_index);
+ return format (s, "%U", format_udp_connection, uc, verbose);
+}
-int
-udpc_connection_open (transport_endpoint_t * rmt)
+static u8 *
+format_udp_half_open_session (u8 * s, va_list * args)
{
- udp_connection_t *uc;
- u32 uc_index;
- uc_index = udp_open_connection (rmt);
- uc = udp_connection_get (uc_index, vlib_get_thread_index ());
- uc->is_connected = 1;
- return uc_index;
+ u32 __clib_unused tci = va_arg (*args, u32);
+ u32 __clib_unused thread_index = va_arg (*args, u32);
+ clib_warning ("BUG");
+ return 0;
}
-u32
-udpc_connection_listen (u32 session_index, transport_endpoint_t * lcl)
+static u8 *
+format_udp_listener_session (u8 * s, va_list * args)
{
- udp_connection_t *listener;
- u32 li;
- li = udp_session_bind (session_index, lcl);
- listener = udp_listener_get (li);
- listener->is_connected = 1;
- return li;
+ u32 tci = va_arg (*args, u32);
+ u32 __clib_unused thread_index = va_arg (*args, u32);
+ u32 verbose = va_arg (*args, u32);
+ udp_connection_t *uc = udp_listener_get (tci);
+ return format (s, "%U", format_udp_connection, uc, verbose);
}
/* *INDENT-OFF* */
-const static transport_proto_vft_t udpc_proto = {
- .bind = udpc_connection_listen,
- .open = udpc_connection_open,
- .unbind = udp_session_unbind,
+static const transport_proto_vft_t udp_proto = {
+ .start_listen = udp_session_bind,
+ .connect = udp_open_connection,
+ .stop_listen = udp_session_unbind,
.push_header = udp_push_header,
.get_connection = udp_session_get,
.get_listener = udp_session_get_listener,
.get_half_open = udp_session_get_half_open,
.close = udp_session_close,
.cleanup = udp_session_cleanup,
- .send_mss = udp_send_mss,
- .send_space = udp_send_space,
+ .send_params = udp_session_send_params,
.format_connection = format_udp_session,
.format_half_open = format_udp_half_open_session,
.format_listener = format_udp_listener_session,
- .tx_type = TRANSPORT_TX_DEQUEUE,
- .service_type = TRANSPORT_SERVICE_CL,
+ .transport_options = {
+ .name = "udp",
+ .short_name = "U",
+ .tx_type = TRANSPORT_TX_DGRAM,
+ .service_type = TRANSPORT_SERVICE_CL,
+ },
};
/* *INDENT-ON* */
ip_main_t *im = &ip_main;
vlib_thread_main_t *tm = vlib_get_thread_main ();
u32 num_threads;
- clib_error_t *error = 0;
ip_protocol_info_t *pi;
int i;
- 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
*/
FIB_PROTOCOL_IP4, ip4_lookup_node.index);
transport_register_protocol (TRANSPORT_PROTO_UDP, &udp_proto,
FIB_PROTOCOL_IP6, ip6_lookup_node.index);
- transport_register_protocol (TRANSPORT_PROTO_UDPC, &udpc_proto,
- FIB_PROTOCOL_IP4, ip4_lookup_node.index);
- transport_register_protocol (TRANSPORT_PROTO_UDPC, &udpc_proto,
- FIB_PROTOCOL_IP6, ip6_lookup_node.index);
/*
* Initialize data structures
clib_spinlock_init (&um->peekers_readers_locks[i]);
clib_spinlock_init (&um->peekers_write_locks[i]);
}
- return error;
+
+ um->local_to_input_edge[UDP_IP4] =
+ vlib_node_add_next (vm, udp4_local_node.index, udp4_input_node.index);
+ um->local_to_input_edge[UDP_IP6] =
+ vlib_node_add_next (vm, udp6_local_node.index, udp6_input_node.index);
+
+ um->default_mtu = 1500;
+ return 0;
}
-VLIB_INIT_FUNCTION (udp_init);
+/* *INDENT-OFF* */
+VLIB_INIT_FUNCTION (udp_init) =
+{
+ .runs_after = VLIB_INITS("ip_main_init", "ip4_lookup_init",
+ "ip6_lookup_init"),
+};
+/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
Code Review / vpp.git / blobdiff