* limitations under the License.
*/
-#include <vnet/session/transport.h>
+#include <vnet/session/transport_interface.h>
+#include <vnet/session/session.h>
+#include <vnet/fib/fib.h>
+
+/**
+ * Per-type vector of transport protocol virtual function tables
+ */
+transport_proto_vft_t *tp_vfts;
+
+/*
+ * Port allocator seed
+ */
+static u32 port_allocator_seed;
+
+/*
+ * Local endpoints table
+ */
+static transport_endpoint_table_t local_endpoints_table;
+
+/*
+ * Pool of local endpoints
+ */
+static transport_endpoint_t *local_endpoints;
+
+/*
+ * Local endpoints pool lock
+ */
+static clib_spinlock_t local_endpoints_lock;
+
+u8 *
+format_transport_proto (u8 * s, va_list * args)
+{
+ u32 transport_proto = va_arg (*args, u32);
+ switch (transport_proto)
+ {
+ case TRANSPORT_PROTO_TCP:
+ s = format (s, "TCP");
+ break;
+ case TRANSPORT_PROTO_UDP:
+ s = format (s, "UDP");
+ break;
+ case TRANSPORT_PROTO_SCTP:
+ s = format (s, "SCTP");
+ break;
+ }
+ return s;
+}
+
+u8 *
+format_transport_proto_short (u8 * s, va_list * args)
+{
+ u32 transport_proto = va_arg (*args, u32);
+ switch (transport_proto)
+ {
+ case TRANSPORT_PROTO_TCP:
+ s = format (s, "T");
+ break;
+ case TRANSPORT_PROTO_UDP:
+ s = format (s, "U");
+ break;
+ case TRANSPORT_PROTO_SCTP:
+ s = format (s, "S");
+ break;
+ }
+ return s;
+}
+
+uword
+unformat_transport_proto (unformat_input_t * input, va_list * args)
+{
+ u32 *proto = va_arg (*args, u32 *);
+ if (unformat (input, "tcp"))
+ *proto = TRANSPORT_PROTO_TCP;
+ else if (unformat (input, "TCP"))
+ *proto = TRANSPORT_PROTO_TCP;
+ else if (unformat (input, "udp"))
+ *proto = TRANSPORT_PROTO_UDP;
+ else if (unformat (input, "UDP"))
+ *proto = TRANSPORT_PROTO_UDP;
+ else if (unformat (input, "sctp"))
+ *proto = TRANSPORT_PROTO_SCTP;
+ else if (unformat (input, "SCTP"))
+ *proto = TRANSPORT_PROTO_SCTP;
+ else if (unformat (input, "tls"))
+ *proto = TRANSPORT_PROTO_TLS;
+ else if (unformat (input, "TLS"))
+ *proto = TRANSPORT_PROTO_TLS;
+ else
+ return 0;
+ return 1;
+}
u32
-transport_endpoint_lookup (transport_endpoint_table_t *ht, ip46_address_t *ip,
- u16 port)
+transport_endpoint_lookup (transport_endpoint_table_t * ht, u8 proto,
+ ip46_address_t * ip, u16 port)
{
clib_bihash_kv_24_8_t kv;
int rv;
kv.key[0] = ip->as_u64[0];
kv.key[1] = ip->as_u64[1];
- kv.key[2] = port;
+ kv.key[2] = (u64) port << 8 | (u64) proto;
rv = clib_bihash_search_inline_24_8 (ht, &kv);
if (rv == 0)
return kv.value;
- return TRANSPORT_ENDPOINT_INVALID_INDEX;
+ return ENDPOINT_INVALID_INDEX;
}
void
-transport_endpoint_table_add (transport_endpoint_table_t *ht,
- transport_endpoint_t *te, u32 value)
+transport_endpoint_table_add (transport_endpoint_table_t * ht, u8 proto,
+ transport_endpoint_t * te, u32 value)
{
clib_bihash_kv_24_8_t kv;
kv.key[0] = te->ip.as_u64[0];
kv.key[1] = te->ip.as_u64[1];
- kv.key[2] = te->port;
+ kv.key[2] = (u64) te->port << 8 | (u64) proto;
kv.value = value;
clib_bihash_add_del_24_8 (ht, &kv, 1);
}
void
-transport_endpoint_table_del (transport_endpoint_table_t *ht,
- transport_endpoint_t *te)
+transport_endpoint_table_del (transport_endpoint_table_t * ht, u8 proto,
+ transport_endpoint_t * te)
{
clib_bihash_kv_24_8_t kv;
kv.key[0] = te->ip.as_u64[0];
kv.key[1] = te->ip.as_u64[1];
- kv.key[2] = te->port;
+ kv.key[2] = (u64) te->port << 8 | (u64) proto;
clib_bihash_add_del_24_8 (ht, &kv, 0);
}
+/**
+ * Register transport virtual function table.
+ *
+ * @param transport_proto - transport protocol type (i.e., TCP, UDP ..)
+ * @param vft - virtual function table for transport proto
+ * @param fib_proto - network layer protocol
+ * @param output_node - output node index that session layer will hand off
+ * buffers to, for requested fib proto
+ */
+void
+transport_register_protocol (transport_proto_t transport_proto,
+ const transport_proto_vft_t * vft,
+ fib_protocol_t fib_proto, u32 output_node)
+{
+ u8 is_ip4 = fib_proto == FIB_PROTOCOL_IP4;
+
+ vec_validate (tp_vfts, transport_proto);
+ tp_vfts[transport_proto] = *vft;
+
+ session_register_transport (transport_proto, vft, is_ip4, output_node);
+}
+
+/**
+ * Get transport virtual function table
+ *
+ * @param type - session type (not protocol type)
+ */
+transport_proto_vft_t *
+transport_protocol_get_vft (transport_proto_t transport_proto)
+{
+ if (transport_proto >= vec_len (tp_vfts))
+ return 0;
+ return &tp_vfts[transport_proto];
+}
+
+#define PORT_MASK ((1 << 16)- 1)
+void
+transport_endpoint_del (u32 tepi)
+{
+ clib_spinlock_lock_if_init (&local_endpoints_lock);
+ pool_put_index (local_endpoints, tepi);
+ clib_spinlock_unlock_if_init (&local_endpoints_lock);
+}
+always_inline transport_endpoint_t *
+transport_endpoint_new (void)
+{
+ transport_endpoint_t *tep;
+ pool_get (local_endpoints, tep);
+ return tep;
+}
+
+void
+transport_endpoint_cleanup (u8 proto, ip46_address_t * lcl_ip, u16 port)
+{
+ u32 tepi;
+ transport_endpoint_t *tep;
+
+ /* Cleanup local endpoint if this was an active connect */
+ tepi = transport_endpoint_lookup (&local_endpoints_table, proto, lcl_ip,
+ clib_net_to_host_u16 (port));
+ if (tepi != ENDPOINT_INVALID_INDEX)
+ {
+ tep = pool_elt_at_index (local_endpoints, tepi);
+ transport_endpoint_table_del (&local_endpoints_table, proto, tep);
+ transport_endpoint_del (tepi);
+ }
+}
+
+/**
+ * Allocate local port and add if successful add entry to local endpoint
+ * table to mark the pair as used.
+ */
+int
+transport_alloc_local_port (u8 proto, ip46_address_t * ip)
+{
+ 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 (&port_allocator_seed) & PORT_MASK;
+ if (PREDICT_TRUE (port >= min && port < max))
+ break;
+ }
+
+ /* Look it up. If not found, we're done */
+ tei = transport_endpoint_lookup (&local_endpoints_table, proto, ip,
+ port);
+ if (tei == ENDPOINT_INVALID_INDEX)
+ {
+ clib_spinlock_lock_if_init (&local_endpoints_lock);
+ tep = transport_endpoint_new ();
+ clib_memcpy (&tep->ip, ip, sizeof (*ip));
+ tep->port = port;
+ transport_endpoint_table_add (&local_endpoints_table, proto, tep,
+ tep - local_endpoints);
+ clib_spinlock_unlock_if_init (&local_endpoints_lock);
+
+ return tep->port;
+ }
+ }
+ return -1;
+}
+
+int
+transport_alloc_local_endpoint (u8 proto, transport_endpoint_t * rmt,
+ ip46_address_t * lcl_addr, u16 * lcl_port)
+{
+ fib_prefix_t prefix;
+ fib_node_index_t fei;
+ u32 sw_if_index;
+ int port;
+
+ /*
+ * Find the local address and allocate port
+ */
+
+ /* 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;
+
+ ASSERT (rmt->fib_index != ENDPOINT_INVALID_INDEX);
+ fei = fib_table_lookup (rmt->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 = rmt->sw_if_index;
+ if (sw_if_index == ENDPOINT_INVALID_INDEX)
+ sw_if_index = fib_entry_get_resolving_interface (fei);
+
+ if (sw_if_index == ENDPOINT_INVALID_INDEX)
+ {
+ clib_warning ("no resolving interface for %U", format_ip46_address,
+ &rmt->ip, (rmt->is_ip4 == 0) + 1);
+ return -1;
+ }
+
+ memset (lcl_addr, 0, sizeof (*lcl_addr));
+
+ if (rmt->is_ip4)
+ {
+ ip4_address_t *ip4;
+ ip4 = ip_interface_get_first_ip (sw_if_index, 1);
+ if (!ip4)
+ {
+ clib_warning ("no routable ip4 address on %U",
+ format_vnet_sw_if_index_name, vnet_get_main (),
+ sw_if_index);
+ return -1;
+ }
+ lcl_addr->ip4.as_u32 = ip4->as_u32;
+ }
+ else
+ {
+ ip6_address_t *ip6;
+ 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 */
+ port = transport_alloc_local_port (proto, lcl_addr);
+ if (port < 1)
+ {
+ clib_warning ("Failed to allocate src port");
+ return -1;
+ }
+ *lcl_port = port;
+ return 0;
+}
+
+void
+transport_update_time (f64 time_now, u8 thread_index)
+{
+ transport_proto_vft_t *vft;
+ vec_foreach (vft, tp_vfts)
+ {
+ if (vft->update_time)
+ (vft->update_time) (time_now, thread_index);
+ }
+}
+
+void
+transport_enable_disable (vlib_main_t * vm, u8 is_en)
+{
+ transport_proto_vft_t *vft;
+ vec_foreach (vft, tp_vfts)
+ {
+ if (vft->enable)
+ (vft->enable) (vm, is_en);
+ }
+}
+
+void
+transport_init (void)
+{
+ vlib_thread_main_t *vtm = vlib_get_thread_main ();
+ session_manager_main_t *smm = vnet_get_session_manager_main ();
+ u32 num_threads;
+
+ if (smm->local_endpoints_table_buckets == 0)
+ smm->local_endpoints_table_buckets = 250000;
+ if (smm->local_endpoints_table_memory == 0)
+ smm->local_endpoints_table_memory = 512 << 20;
+
+ /* Initialize [port-allocator] random number seed */
+ port_allocator_seed = (u32) clib_cpu_time_now ();
+
+ clib_bihash_init_24_8 (&local_endpoints_table, "local endpoints table",
+ smm->local_endpoints_table_buckets,
+ smm->local_endpoints_table_memory);
+ num_threads = 1 /* main thread */ + vtm->n_threads;
+ if (num_threads > 1)
+ clib_spinlock_init (&local_endpoints_lock);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff