#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)
{
void
udp_connection_delete (udp_connection_t * uc)
{
- if ((uc->flags & UDP_CONN_F_OWNS_PORT)
- || !(uc->flags & UDP_CONN_F_CONNECTED))
- udp_unregister_dst_port (vlib_get_main (),
- clib_net_to_host_u16 (uc->c_lcl_port),
- uc->c_is_ip4);
+ udp_connection_unregister_port (clib_net_to_host_u16 (uc->c_lcl_port),
+ uc->c_is_ip4);
session_transport_delete_notify (&uc->connection);
udp_connection_free (uc);
}
transport_endpoint_cfg_t *lcl_ext;
udp_connection_t *listener;
udp_dst_port_info_t *pi;
- u32 node_index;
void *iface_ip;
pi = udp_get_dst_port_info (um, clib_net_to_host_u16 (lcl->port),
lcl->is_ip4);
- if (pi)
- return -1;
+
+ if (pi && !pi->n_connections)
+ {
+ clib_warning ("port already used");
+ return -1;
+ }
pool_get (um->listener_pool, listener);
clib_memset (listener, 0, sizeof (udp_connection_t));
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,
- lcl->is_ip4);
+ udp_connection_register_port (vm, clib_net_to_host_u16 (lcl->port),
+ lcl->is_ip4);
return listener->c_c_index;
}
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;
}
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 = vm->thread_index;
udp_connection_t *uc;
ip46_address_t lcl_addr;
- u32 node_index;
u16 lcl_port;
if (transport_alloc_local_endpoint (TRANSPORT_PROTO_UDP, rmt, &lcl_addr,
&lcl_port))
return -1;
- 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 -1;
+
+ /* 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)
+ {
+ clib_warning ("Failed to allocate src port");
+ return -1;
+ }
}
}
- 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 */ );
+ udp_connection_register_port (vm, lcl_port, rmt->is_ip4);
/* We don't poll main thread if we have workers */
if (vlib_num_workers ())
clib_spinlock_init (&um->peekers_readers_locks[i]);
clib_spinlock_init (&um->peekers_write_locks[i]);
}
+
+ 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);
return 0;
}
Code Review / vpp.git / blobdiff