/*
- * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Copyright (c) 2017-2020 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:
#define __included_udp_h__
#include <vnet/vnet.h>
+#include <vnet/udp/udp_inlines.h>
+#include <vnet/udp/udp_local.h>
#include <vnet/udp/udp_packet.h>
#include <vnet/ip/ip.h>
#include <vnet/ip/ip4.h>
#include <vnet/ip/ip4_packet.h>
-#include <vnet/pg/pg.h>
#include <vnet/ip/format.h>
#include <vnet/ip/ip.h>
#include <vnet/session/transport.h>
-typedef struct
-{
- transport_connection_t connection; /** must be first */
-
- /** ersatz MTU to limit fifo pushes to test data size */
- u32 mtu;
-} udp_connection_t;
-
-typedef struct _udp_uri_main
-{
- /* Per-worker thread udp connection pools */
- udp_connection_t **udp_sessions;
- udp_connection_t *udp_listeners;
-
- /* convenience */
- vlib_main_t *vlib_main;
- vnet_main_t *vnet_main;
- ip4_main_t *ip4_main;
- ip6_main_t *ip6_main;
-} udp_uri_main_t;
-
-extern udp_uri_main_t udp_uri_main;
-extern vlib_node_registration_t udp4_uri_input_node;
-
-always_inline udp_uri_main_t *
-vnet_get_udp_main ()
-{
- return &udp_uri_main;
-}
-
-always_inline udp_connection_t *
-udp_connection_get (u32 conn_index, u32 thread_index)
-{
- return pool_elt_at_index (udp_uri_main.udp_sessions[thread_index],
- conn_index);
-}
-
-always_inline udp_connection_t *
-udp_listener_get (u32 conn_index)
-{
- return pool_elt_at_index (udp_uri_main.udp_listeners, conn_index);
-}
-
typedef enum
{
#define udp_error(n,s) UDP_ERROR_##n,
UDP_N_ERROR,
} udp_error_t;
-#define foreach_udp4_dst_port \
-_ (67, dhcp_to_server) \
-_ (68, dhcp_to_client) \
-_ (500, ikev2) \
-_ (3784, bfd4) \
-_ (3785, bfd_echo4) \
-_ (4341, lisp_gpe) \
-_ (4342, lisp_cp) \
-_ (4739, ipfix) \
-_ (4789, vxlan) \
-_ (4789, vxlan6) \
-_ (4790, vxlan_gpe) \
-_ (6633, vpath_3)
-
-
-#define foreach_udp6_dst_port \
-_ (547, dhcpv6_to_server) \
-_ (546, dhcpv6_to_client) \
-_ (3784, bfd6) \
-_ (3785, bfd_echo6) \
-_ (4341, lisp_gpe6) \
-_ (4342, lisp_cp6) \
-_ (4790, vxlan6_gpe) \
-_ (6633, vpath6_3)
+#define foreach_udp_connection_flag \
+ _(CONNECTED, "CONNECTED") /**< connected mode */ \
+ _(OWNS_PORT, "OWNS_PORT") /**< port belong to conn (UDPC) */ \
+ _(CLOSING, "CLOSING") /**< conn closed with data */ \
+ _(LISTEN, "LISTEN") /**< conn is listening */ \
+ _(MIGRATED, "MIGRATED") /**< cloned to another thread */ \
-typedef enum
+enum udp_conn_flags_bits
{
-#define _(n,f) UDP_DST_PORT_##f = n,
- foreach_udp4_dst_port foreach_udp6_dst_port
+#define _(sym, str) UDP_CONN_F_BIT_##sym,
+ foreach_udp_connection_flag
#undef _
-} udp_dst_port_t;
+ UDP_CONN_N_FLAGS
+};
-typedef enum
+typedef enum udp_conn_flags_
{
-#define _(n,f) UDP6_DST_PORT_##f = n,
- foreach_udp6_dst_port
+#define _(sym, str) UDP_CONN_F_##sym = 1 << UDP_CONN_F_BIT_##sym,
+ foreach_udp_connection_flag
#undef _
-} udp6_dst_port_t;
+} udp_conn_flags_t;
+
+typedef struct
+{
+ /** Required for pool_get_aligned */
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
+ transport_connection_t connection; /**< must be first */
+ clib_spinlock_t rx_lock; /**< rx fifo lock */
+ u8 flags; /**< connection flags */
+ u16 mss; /**< connection mss */
+} udp_connection_t;
typedef struct
{
/* Name (a c string). */
char *name;
- /* GRE protocol type in host byte order. */
+ /* Port number in host byte order. */
udp_dst_port_t dst_port;
/* Node which handles this type. */
/* Next index for this type. */
u32 next_index;
+
+ /* UDP sessions refcount (not tunnels) */
+ u32 n_connections;
+
+ /* Parser for packet generator edits for this protocol */
+ unformat_function_t *unformat_pg_edit;
} udp_dst_port_info_t;
typedef enum
u8 punt_unknown4;
u8 punt_unknown6;
- /* convenience */
- vlib_main_t *vlib_main;
+ /* Udp local to input arc index */
+ u32 local_to_input_edge[N_UDP_AF];
+
+ /*
+ * Per-worker thread udp connection pools used with session layer
+ */
+ udp_connection_t **connections;
+ u32 *connection_peekers;
+ clib_spinlock_t *peekers_readers_locks;
+ clib_spinlock_t *peekers_write_locks;
+ udp_connection_t *listener_pool;
+
+ u16 default_mtu;
} udp_main_t;
-always_inline udp_dst_port_info_t *
-udp_get_dst_port_info (udp_main_t * um, udp_dst_port_t dst_port, u8 is_ip4)
+extern udp_main_t udp_main;
+extern vlib_node_registration_t udp4_input_node;
+extern vlib_node_registration_t udp6_input_node;
+extern vlib_node_registration_t udp4_local_node;
+extern vlib_node_registration_t udp6_local_node;
+
+void udp_add_dst_port (udp_main_t * um, udp_dst_port_t dst_port,
+ char *dst_port_name, u8 is_ip4);
+
+always_inline udp_connection_t *
+udp_connection_get (u32 conn_index, u32 thread_index)
{
- uword *p = hash_get (um->dst_port_info_by_dst_port[is_ip4], dst_port);
- return p ? vec_elt_at_index (um->dst_port_infos[is_ip4], p[0]) : 0;
+ if (pool_is_free_index (udp_main.connections[thread_index], conn_index))
+ return 0;
+ return pool_elt_at_index (udp_main.connections[thread_index], conn_index);
}
-format_function_t format_udp_header;
-format_function_t format_udp_rx_trace;
+always_inline udp_connection_t *
+udp_listener_get (u32 conn_index)
+{
+ return pool_elt_at_index (udp_main.listener_pool, conn_index);
+}
-unformat_function_t unformat_udp_header;
+always_inline udp_main_t *
+vnet_get_udp_main ()
+{
+ return &udp_main;
+}
-void udp_register_dst_port (vlib_main_t * vm,
- udp_dst_port_t dst_port,
- u32 node_index, u8 is_ip4);
+always_inline udp_connection_t *
+udp_connection_from_transport (transport_connection_t * tc)
+{
+ return ((udp_connection_t *) tc);
+}
-void
-udp_unregister_dst_port (vlib_main_t * vm,
- udp_dst_port_t dst_port, u8 is_ip4);
+always_inline u32
+udp_connection_index (udp_connection_t * uc)
+{
+ return (uc - udp_main.connections[uc->c_thread_index]);
+}
-void udp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add);
+void udp_connection_free (udp_connection_t * uc);
+udp_connection_t *udp_connection_alloc (u32 thread_index);
+/**
+ * Acquires a lock that blocks a connection pool from expanding.
+ */
always_inline void
-ip_udp_fixup_one (vlib_main_t * vm, vlib_buffer_t * b0, u8 is_ip4)
+udp_pool_add_peeker (u32 thread_index)
{
- u16 new_l0;
- udp_header_t *udp0;
-
- if (is_ip4)
- {
- ip4_header_t *ip0;
- ip_csum_t sum0;
- u16 old_l0 = 0;
-
- ip0 = vlib_buffer_get_current (b0);
-
- /* fix the <bleep>ing outer-IP checksum */
- sum0 = ip0->checksum;
- /* old_l0 always 0, see the rewrite setup */
- new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
-
- sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
- length /* changed member */ );
- ip0->checksum = ip_csum_fold (sum0);
- ip0->length = new_l0;
-
- /* Fix UDP length */
- udp0 = (udp_header_t *) (ip0 + 1);
- new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)
- - sizeof (*ip0));
- udp0->length = new_l0;
- }
- else
- {
- ip6_header_t *ip0;
- int bogus0;
-
- ip0 = vlib_buffer_get_current (b0);
-
- new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)
- - sizeof (*ip0));
- ip0->payload_length = new_l0;
-
- /* Fix UDP length */
- udp0 = (udp_header_t *) (ip0 + 1);
- udp0->length = new_l0;
-
- udp0->checksum =
- ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0, &bogus0);
- ASSERT (bogus0 == 0);
-
- if (udp0->checksum == 0)
- udp0->checksum = 0xffff;
- }
+ if (thread_index != vlib_get_thread_index ())
+ return;
+ clib_spinlock_lock_if_init (&udp_main.peekers_readers_locks[thread_index]);
+ udp_main.connection_peekers[thread_index] += 1;
+ if (udp_main.connection_peekers[thread_index] == 1)
+ clib_spinlock_lock_if_init (&udp_main.peekers_write_locks[thread_index]);
+ clib_spinlock_unlock_if_init (&udp_main.peekers_readers_locks
+ [thread_index]);
}
always_inline void
-ip_udp_encap_one (vlib_main_t * vm, vlib_buffer_t * b0, u8 * ec0, word ec_len,
- u8 is_ip4)
+udp_pool_remove_peeker (u32 thread_index)
{
- vlib_buffer_advance (b0, -ec_len);
-
- if (is_ip4)
- {
- ip4_header_t *ip0;
-
- ip0 = vlib_buffer_get_current (b0);
-
- /* Apply the encap string. */
- clib_memcpy (ip0, ec0, ec_len);
- ip_udp_fixup_one (vm, b0, 1);
- }
- else
- {
- ip6_header_t *ip0;
-
- ip0 = vlib_buffer_get_current (b0);
+ if (thread_index != vlib_get_thread_index ())
+ return;
+ ASSERT (udp_main.connection_peekers[thread_index] > 0);
+ clib_spinlock_lock_if_init (&udp_main.peekers_readers_locks[thread_index]);
+ udp_main.connection_peekers[thread_index] -= 1;
+ if (udp_main.connection_peekers[thread_index] == 0)
+ clib_spinlock_unlock_if_init (&udp_main.peekers_write_locks
+ [thread_index]);
+ clib_spinlock_unlock_if_init (&udp_main.peekers_readers_locks
+ [thread_index]);
+}
- /* Apply the encap string. */
- clib_memcpy (ip0, ec0, ec_len);
- ip_udp_fixup_one (vm, b0, 0);
- }
+always_inline udp_connection_t *
+udp_connection_clone_safe (u32 connection_index, u32 thread_index)
+{
+ udp_connection_t *old_c, *new_c;
+ u32 current_thread_index = vlib_get_thread_index ();
+ new_c = udp_connection_alloc (current_thread_index);
+
+ /* If during the memcpy pool is reallocated AND the memory allocator
+ * decides to give the old chunk of memory to somebody in a hurry to
+ * scribble something on it, we have a problem. So add this thread as
+ * a session pool peeker.
+ */
+ udp_pool_add_peeker (thread_index);
+ old_c = udp_main.connections[thread_index] + connection_index;
+ clib_memcpy_fast (new_c, old_c, sizeof (*new_c));
+ old_c->flags |= UDP_CONN_F_MIGRATED;
+ udp_pool_remove_peeker (thread_index);
+ new_c->c_thread_index = current_thread_index;
+ new_c->c_c_index = udp_connection_index (new_c);
+ new_c->c_fib_index = old_c->c_fib_index;
+ return new_c;
}
-always_inline void
-ip_udp_encap_two (vlib_main_t * vm, vlib_buffer_t * b0, vlib_buffer_t * b1,
- u8 * ec0, u8 * ec1, word ec_len, u8 is_v4)
+always_inline udp_dst_port_info_t *
+udp_get_dst_port_info (udp_main_t * um, udp_dst_port_t dst_port, u8 is_ip4)
{
- u16 new_l0, new_l1;
- udp_header_t *udp0, *udp1;
-
- ASSERT (_vec_len (ec0) == _vec_len (ec1));
-
- vlib_buffer_advance (b0, -ec_len);
- vlib_buffer_advance (b1, -ec_len);
-
- if (is_v4)
- {
- ip4_header_t *ip0, *ip1;
- ip_csum_t sum0, sum1;
- u16 old_l0 = 0, old_l1 = 0;
-
- ip0 = vlib_buffer_get_current (b0);
- ip1 = vlib_buffer_get_current (b1);
-
- /* Apply the encap string */
- clib_memcpy (ip0, ec0, ec_len);
- clib_memcpy (ip1, ec1, ec_len);
-
- /* fix the <bleep>ing outer-IP checksum */
- sum0 = ip0->checksum;
- sum1 = ip1->checksum;
-
- /* old_l0 always 0, see the rewrite setup */
- new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
- new_l1 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b1));
-
- sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
- length /* changed member */ );
- sum1 = ip_csum_update (sum1, old_l1, new_l1, ip4_header_t,
- length /* changed member */ );
-
- ip0->checksum = ip_csum_fold (sum0);
- ip1->checksum = ip_csum_fold (sum1);
-
- ip0->length = new_l0;
- ip1->length = new_l1;
-
- /* Fix UDP length */
- udp0 = (udp_header_t *) (ip0 + 1);
- udp1 = (udp_header_t *) (ip1 + 1);
-
- new_l0 =
- clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) -
- sizeof (*ip0));
- new_l1 =
- clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b1) -
- sizeof (*ip1));
- udp0->length = new_l0;
- udp1->length = new_l1;
- }
- else
- {
- ip6_header_t *ip0, *ip1;
- int bogus0, bogus1;
-
- ip0 = vlib_buffer_get_current (b0);
- ip1 = vlib_buffer_get_current (b1);
-
- /* Apply the encap string. */
- clib_memcpy (ip0, ec0, ec_len);
- clib_memcpy (ip1, ec1, ec_len);
-
- new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)
- - sizeof (*ip0));
- new_l1 = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b1)
- - sizeof (*ip1));
- ip0->payload_length = new_l0;
- ip1->payload_length = new_l1;
-
- /* Fix UDP length */
- udp0 = (udp_header_t *) (ip0 + 1);
- udp1 = (udp_header_t *) (ip1 + 1);
-
- udp0->length = new_l0;
- udp1->length = new_l1;
-
- udp0->checksum =
- ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0, &bogus0);
- udp1->checksum =
- ip6_tcp_udp_icmp_compute_checksum (vm, b1, ip1, &bogus1);
- ASSERT (bogus0 == 0);
- ASSERT (bogus1 == 0);
-
- if (udp0->checksum == 0)
- udp0->checksum = 0xffff;
- if (udp1->checksum == 0)
- udp1->checksum = 0xffff;
- }
+ uword *p = hash_get (um->dst_port_info_by_dst_port[is_ip4], dst_port);
+ return p ? vec_elt_at_index (um->dst_port_infos[is_ip4], p[0]) : 0;
}
+format_function_t format_udp_header;
+format_function_t format_udp_rx_trace;
+format_function_t format_udp_connection;
+unformat_function_t unformat_udp_header;
+unformat_function_t unformat_udp_port;
+
+void udp_connection_share_port (u16 lcl_port, u8 is_ip4);
+
+void udp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add);
+
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff