#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_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)
{
- 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);
session_transport_delete_notify (&uc->connection);
- udp_connection_free (uc);
+ udp_connection_cleanup (uc);
+}
+
+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));
}
u32
vlib_main_t *vm = vlib_get_main ();
transport_endpoint_cfg_t *lcl_ext;
udp_connection_t *listener;
- udp_dst_port_info_t *pi;
- u32 node_index;
+ u16 lcl_port_ho;
void *iface_ip;
- pi = udp_get_dst_port_info (um, clib_net_to_host_u16 (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);
clib_memset (listener, 0, sizeof (udp_connection_t));
listener->c_proto = TRANSPORT_PROTO_UDP;
listener->c_s_index = session_index;
listener->c_fib_index = lcl->fib_index;
- listener->flags |= UDP_CONN_F_OWNS_PORT;
+ 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;
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, lcl_port_ho, 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;
}
{
udp_connection_t *uc;
uc = udp_connection_get (connection_index, thread_index);
- if (uc)
+ if (!uc)
+ return;
+ if (uc->flags & UDP_CONN_F_MIGRATED)
udp_connection_free (uc);
+ else
+ udp_connection_cleanup (uc);
}
u8 *
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,
+ s = format (s, "[%u:%u][%s] %U:%d->%U:%d", uc->c_thread_index,
+ uc->c_s_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));
else
- s = format (s, "[#%d][%s] %U:%d->%U:%d", uc->c_thread_index, "U",
- format_ip6_address, &uc->c_lcl_ip6,
+ s = format (s, "[%u:%u][%s] %U:%d->%U:%d", uc->c_thread_index,
+ uc->c_s_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;
}
+const char *udp_connection_flags_str[] = {
+#define _(sym, str) str,
+ foreach_udp_connection_flag
+#undef _
+};
+
+static u8 *
+format_udp_connection_flags (u8 * s, va_list * args)
+{
+ udp_connection_t *uc = va_arg (*args, udp_connection_t *);
+ int i, last = -1;
+
+ for (i = 0; i < UDP_CONN_N_FLAGS; i++)
+ if (uc->flags & (1 << i))
+ last = i;
+ for (i = 0; i < last; i++)
+ {
+ if (uc->flags & (1 << i))
+ s = format (s, "%s, ", udp_connection_flags_str[i]);
+ }
+ if (last >= 0)
+ s = format (s, "%s", udp_connection_flags_str[last]);
+ return s;
+}
+
+static u8 *
+format_udp_vars (u8 * s, va_list * args)
+{
+ udp_connection_t *uc = va_arg (*args, udp_connection_t *);
+ s = format (s, " index %u flags: %U", uc->c_c_index,
+ format_udp_connection_flags, uc);
+
+ if (!(uc->flags & UDP_CONN_F_LISTEN))
+ s = format (s, "\n");
+ return s;
+}
+
u8 *
format_udp_connection (u8 * s, va_list * args)
{
s = format (s, "%-50U", format_udp_connection_id, uc);
if (verbose)
{
- if (verbose == 1)
- s = format (s, "%-15s", "-");
- else
- s = format (s, "\n");
+ s = format (s, "%-15s",
+ (uc->flags & UDP_CONN_F_LISTEN) ? "LISTEN" : "OPENED", uc);
+ if (verbose > 1)
+ s = format (s, "\n%U", format_udp_vars, uc);
}
return s;
}
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;
+ 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 ())
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