session: api to add new transport types

[vpp.git] / src / vnet / session / transport_types.h

diff --git a/src/vnet/session/transport_types.h b/src/vnet/session/transport_types.h
index e262dda..44934da 100644 (file)
--- a/src/vnet/session/transport_types.h
+++ b/src/vnet/session/transport_types.h
@@ -20,7 +20,8 @@
 #include <vnet/ip/ip.h>
 #include <vnet/tcp/tcp_debug.h>
 
-#define TRANSPORT_MAX_HDRS_LEN    100  /* Max number of bytes for headers */
+#define TRANSPORT_MAX_HDRS_LEN    140  /* Max number of bytes for headers */
+
 
 typedef enum transport_dequeue_type_
 {
@@ -39,19 +40,31 @@ typedef enum transport_service_type_
   TRANSPORT_N_SERVICES
 } transport_service_type_t;
 
-typedef struct _transport_stats
+typedef enum transport_connection_flags_
 {
-  u64 tx_bytes;
-} transport_stats_t;
+  TRANSPORT_CONNECTION_F_IS_TX_PACED = 1 << 0,
+  /**
+   * Don't register connection in lookup. Does not apply to local apps
+   * and transports using the network layer (udp/tcp)
+   */
+  TRANSPORT_CONNECTION_F_NO_LOOKUP = 1 << 1,
+  /**
+   * Connection descheduled by the session layer.
+   */
+  TRANSPORT_CONNECTION_F_DESCHED = 1 << 2,
+} transport_connection_flags_t;
 
 typedef struct _spacer
 {
+  u64 bytes_per_sec;
   u64 bucket;
-  u32 max_burst_size;
+  clib_us_time_t last_update;
   f32 tokens_per_period;
-  u64 last_update;
+  u32 idle_timeout_us;
 } spacer_t;
 
+#define TRANSPORT_CONN_ID_LEN  44
+
 /*
  * Protocol independent transport properties associated to a session
  */
@@ -67,27 +80,28 @@ typedef struct _transport_connection
     {
       ip46_address_t rmt_ip;   /**< Remote IP */
       ip46_address_t lcl_ip;   /**< Local IP */
+      u32 fib_index;           /**< Network namespace */
       u16 rmt_port;            /**< Remote port */
       u16 lcl_port;            /**< Local port */
       u8 is_ip4;               /**< Flag if IP4 connection */
       u8 proto;                        /**< Protocol id */
-      u32 fib_index;           /**< Network namespace */
+      u8 unused[2];            /**< First field after id wants to be
+                                    4-byte aligned) */
     };
     /*
      * Opaque connection ID
      */
-    u8 opaque_conn_id[42];
+    u8 opaque_conn_id[TRANSPORT_CONN_ID_LEN];
   };
 
   u32 s_index;                 /**< Parent session index */
   u32 c_index;                 /**< Connection index in transport pool */
   u32 thread_index;            /**< Worker-thread index */
+  u8 flags;                    /**< Transport specific flags */
 
   /*fib_node_index_t rmt_fei;
      dpo_id_t rmt_dpo; */
 
-  u8 flags;                    /**< Transport specific flags */
-  transport_stats_t stats;     /**< Transport connection stats */
   spacer_t pacer;              /**< Simple transport pacer */
 
 #if TRANSPORT_DEBUG
@@ -95,6 +109,12 @@ typedef struct _transport_connection
   u32 cc_stat_tstamp;          /**< CC stats timestamp */
 #endif
 
+  /**
+   * Transport specific state starts in next cache line. Meant to avoid
+   * alignment surprises in transports when base class changes.
+   */
+    CLIB_CACHE_LINE_ALIGN_MARK (end);
+
   /** Macros for 'derived classes' where base is named "connection" */
 #define c_lcl_ip connection.lcl_ip
 #define c_rmt_ip connection.rmt_ip
@@ -120,18 +140,27 @@ typedef struct _transport_connection
 #define c_flags connection.flags
 } transport_connection_t;
 
-#define TRANSPORT_CONNECTION_F_IS_TX_PACED     1 << 0
+STATIC_ASSERT (STRUCT_OFFSET_OF (transport_connection_t, s_index)
+              == TRANSPORT_CONN_ID_LEN, "update conn id len");
+
+/* Warn if size changes. Two cache lines is already generous, hopefully we
+ * won't have to outgrow that. */
+STATIC_ASSERT (sizeof (transport_connection_t) <= 128,
+              "moved into 3rd cache line");
+
+#define foreach_transport_proto                                \
+  _(TCP, "tcp", "T")                                   \
+  _(UDP, "udp", "U")                                   \
+  _(NONE, "ct", "C")                                   \
+  _(TLS, "tls", "J")                                   \
+  _(UDPC, "udpc", "U")                                 \
+  _(QUIC, "quic", "Q")                                 \
 
 typedef enum _transport_proto
 {
-  TRANSPORT_PROTO_TCP,
-  TRANSPORT_PROTO_UDP,
-  TRANSPORT_PROTO_SCTP,
-  TRANSPORT_PROTO_NONE,
-  TRANSPORT_PROTO_TLS,
-  TRANSPORT_PROTO_UDPC,
-  TRANSPORT_PROTO_QUIC,
-  TRANSPORT_N_PROTO
+#define _(sym, str, sstr) TRANSPORT_PROTO_ ## sym,
+  foreach_transport_proto
+#undef _
 } transport_proto_t;
 
 u8 *format_transport_proto (u8 * s, va_list * args);
@@ -141,6 +170,7 @@ u8 *format_transport_listen_connection (u8 * s, va_list * args);
 u8 *format_transport_half_open_connection (u8 * s, va_list * args);
 
 uword unformat_transport_proto (unformat_input_t * input, va_list * args);
+u8 *format_transport_protos (u8 * s, va_list * args);
 
 #define foreach_transport_endpoint_fields                              \
   _(ip46_address_t, ip) /**< ip address in net order */                        \
@@ -159,6 +189,7 @@ typedef struct transport_endpoint_
 #define foreach_transport_endpoint_cfg_fields                          \
   foreach_transport_endpoint_fields                                    \
   _(transport_endpoint_t, peer)                                                \
+  _(u16, mss)                                                          \
 
 typedef struct transport_endpoint_pair_
 {
@@ -184,6 +215,7 @@ transport_endpoint_fib_proto (transport_endpoint_t * tep)
 }
 
 u8 transport_protocol_is_cl (transport_proto_t tp);
+u8 transport_half_open_has_fifos (transport_proto_t tp);
 transport_service_type_t transport_protocol_service_type (transport_proto_t);
 transport_tx_fn_type_t transport_protocol_tx_fn_type (transport_proto_t tp);