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/*
* 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:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __included_udp_h__
#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/ip/format.h>
#include <vnet/ip/ip.h>
#include <vnet/session/transport.h>
typedef enum
{
#define udp_error(n,s) UDP_ERROR_##n,
#include <vnet/udp/udp_error.def>
#undef udp_error
UDP_N_ERROR,
} udp_error_t;
#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 */ \
enum udp_conn_flags_bits
{
#define _(sym, str) UDP_CONN_F_BIT_##sym,
foreach_udp_connection_flag
#undef _
UDP_CONN_N_FLAGS
};
typedef enum udp_conn_flags_
{
#define _(sym, str) UDP_CONN_F_##sym = 1 << UDP_CONN_F_BIT_##sym,
foreach_udp_connection_flag
#undef _
} 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;
/* Port number in host byte order. */
udp_dst_port_t dst_port;
/* Node which handles this type. */
u32 node_index;
/* 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
{
UDP_IP6 = 0,
UDP_IP4, /* the code is full of is_ip4... */
N_UDP_AF,
} udp_af_t;
typedef struct
{
udp_dst_port_info_t *dst_port_infos[N_UDP_AF];
/* Hash tables mapping name/protocol to protocol info index. */
uword *dst_port_info_by_name[N_UDP_AF];
uword *dst_port_info_by_dst_port[N_UDP_AF];
/* Sparse vector mapping udp dst_port in network byte order
to next index. */
u16 *next_by_dst_port4;
u16 *next_by_dst_port6;
u8 punt_unknown4;
u8 punt_unknown6;
/* 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;
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)
{
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);
}
always_inline udp_connection_t *
udp_listener_get (u32 conn_index)
{
return pool_elt_at_index (udp_main.listener_pool, conn_index);
}
always_inline udp_main_t *
vnet_get_udp_main ()
{
return &udp_main;
}
always_inline udp_connection_t *
udp_connection_from_transport (transport_connection_t * tc)
{
return ((udp_connection_t *) tc);
}
always_inline u32
udp_connection_index (udp_connection_t * uc)
{
return (uc - udp_main.connections[uc->c_thread_index]);
}
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
udp_pool_add_peeker (u32 thread_index)
{
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
udp_pool_remove_peeker (u32 thread_index)
{
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]);
}
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 udp_dst_port_info_t *
udp_get_dst_port_info (udp_main_t * um, udp_dst_port_t dst_port, u8 is_ip4)
{
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
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
#endif /* __included_udp_h__ */
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