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-rw-r--r--src/vnet/sctp/sctp.h130
1 files changed, 76 insertions, 54 deletions
diff --git a/src/vnet/sctp/sctp.h b/src/vnet/sctp/sctp.h
index 25fae37b6f7..af652dc06dc 100644
--- a/src/vnet/sctp/sctp.h
+++ b/src/vnet/sctp/sctp.h
@@ -89,6 +89,13 @@ typedef enum _sctp_error
#define sctp_trajectory_add_start(b, start)
#endif
+enum _sctp_subconn_state
+{
+ SCTP_SUBCONN_STATE_DOWN = 0,
+ SCTP_SUBCONN_STATE_UP,
+ SCTP_SUBCONN_STATE_ALLOW_HB
+};
+
typedef struct _sctp_sub_connection
{
transport_connection_t connection; /**< Common transport data. First! */
@@ -122,14 +129,16 @@ typedef struct _sctp_sub_connection
Every time the RTT calculation completes (i.e., the DATA chunk is SACK'd),
clear this flag. */
- u32 last_time; /**< The time to which this destination was last sent a packet to.
+ u32 last_seen; /**< The time to which this destination was last sent a packet to.
This can be used to determine if a HEARTBEAT is needed. */
u8 unacknowledged_hb; /**< Used to track how many unacknowledged heartbeats we had;
- If more than Max.Retransmit then connetion is considered unreachable. */
+ If more than SCTP_PATH_MAX_RETRANS then connection is considered unreachable. */
u8 is_retransmitting; /**< A flag (0 = no, 1 = yes) indicating whether the connection is retransmitting a previous packet */
+ u8 enqueue_state;
+
} sctp_sub_connection_t;
typedef struct
@@ -249,9 +258,9 @@ void sctp_connection_del (sctp_connection_t * sctp_conn);
u32 sctp_push_header (transport_connection_t * tconn, vlib_buffer_t * b);
void sctp_send_init (sctp_connection_t * sctp_conn);
void sctp_send_shutdown (sctp_connection_t * sctp_conn);
-void sctp_send_shutdown_ack (sctp_connection_t * sctp_conn,
+void sctp_send_shutdown_ack (sctp_connection_t * sctp_conn, u8 idx,
vlib_buffer_t * b);
-void sctp_send_shutdown_complete (sctp_connection_t * sctp_conn,
+void sctp_send_shutdown_complete (sctp_connection_t * sctp_conn, u8 idx,
vlib_buffer_t * b0);
void sctp_send_heartbeat (sctp_connection_t * sctp_conn);
void sctp_flush_frame_to_output (vlib_main_t * vm, u8 thread_index,
@@ -268,24 +277,25 @@ u8 *format_sctp_header (u8 * s, va_list * args);
u8 *format_sctp_tx_trace (u8 * s, va_list * args);
clib_error_t *sctp_init (vlib_main_t * vm);
-void sctp_connection_timers_init (sctp_connection_t * tc);
-void sctp_connection_timers_reset (sctp_connection_t * tc);
-void sctp_init_snd_vars (sctp_connection_t * tc);
-void sctp_init_mss (sctp_connection_t * tc);
+void sctp_connection_timers_init (sctp_connection_t * sctp_conn);
+void sctp_connection_timers_reset (sctp_connection_t * sctp_conn);
+void sctp_init_snd_vars (sctp_connection_t * sctp_conn);
+void sctp_init_mss (sctp_connection_t * sctp_conn);
-void sctp_prepare_initack_chunk (sctp_connection_t * ts, vlib_buffer_t * b,
- ip4_address_t * ip4_addr,
+void sctp_prepare_initack_chunk (sctp_connection_t * sctp_conn, u8 idx,
+ vlib_buffer_t * b, ip4_address_t * ip4_addr,
ip6_address_t * ip6_addr);
-void sctp_prepare_cookie_echo_chunk (sctp_connection_t * tc,
+void sctp_prepare_cookie_echo_chunk (sctp_connection_t * sctp_conn, u8 idx,
vlib_buffer_t * b,
sctp_state_cookie_param_t * sc);
-void sctp_prepare_cookie_ack_chunk (sctp_connection_t * tc,
+void sctp_prepare_cookie_ack_chunk (sctp_connection_t * sctp_conn, u8 idx,
vlib_buffer_t * b);
-void sctp_prepare_sack_chunk (sctp_connection_t * tc, vlib_buffer_t * b);
-void sctp_prepare_heartbeat_ack_chunk (sctp_connection_t * sctp_conn,
+void sctp_prepare_sack_chunk (sctp_connection_t * sctp_conn, u8 idx,
+ vlib_buffer_t * b);
+void sctp_prepare_heartbeat_ack_chunk (sctp_connection_t * sctp_conn, u8 idx,
vlib_buffer_t * b);
-u16 sctp_check_outstanding_data_chunks (sctp_connection_t * tc);
+u16 sctp_check_outstanding_data_chunks (sctp_connection_t * sctp_conn);
#define IP_PROTOCOL_SCTP 132
@@ -407,7 +417,11 @@ sctp_optparam_type_to_string (u8 type)
#define SCTP_RTO_ALPHA 1/8
#define SCTP_RTO_BETA 1/4
#define SCTP_VALID_COOKIE_LIFE 60 * SHZ /* 60 seconds */
-#define SCTP_ASSOCIATION_MAX_RETRANS 10
+#define SCTP_ASSOCIATION_MAX_RETRANS 10 // the overall connection
+#define SCTP_PATH_MAX_RETRANS 5 // number of attempts per destination address
+#define SCTP_MAX_INIT_RETRANS 8 // number of attempts
+#define SCTP_HB_INTERVAL 30 * SHZ
+#define SCTP_HB_MAX_BURST 1
#define SCTP_TO_TIMER_TICK SCTP_TICK*10 /* Period for converting from SCTP_TICK */
@@ -696,56 +710,64 @@ sctp_connection_get (u32 conn_index, u32 thread_index)
return pool_elt_at_index (sctp_main.connections[thread_index], conn_index);
}
+#define SELECT_MAX_RETRIES 8
+
always_inline u8
-sctp_pick_conn_idx_on_chunk (sctp_chunk_type chunk_type)
+sctp_data_subconn_select (sctp_connection_t * sctp_conn)
{
- u8 idx = MAIN_SCTP_SUB_CONN_IDX;
+ u8 i = 0;
+ u8 state = SCTP_SUBCONN_STATE_DOWN;
+ u32 sub = MAIN_SCTP_SUB_CONN_IDX;
+ u32 data_subconn_seed = random_default_seed ();
- switch (chunk_type)
+ while (state == SCTP_SUBCONN_STATE_DOWN && i < SELECT_MAX_RETRIES)
{
- case DATA:
- case INIT:
- case INIT_ACK:
- case SACK:
- case HEARTBEAT:
- case HEARTBEAT_ACK:
- case ABORT:
- case SHUTDOWN:
- case SHUTDOWN_ACK:
- case OPERATION_ERROR:
- case COOKIE_ECHO:
- case COOKIE_ACK:
- case ECNE:
- case CWR:
- case SHUTDOWN_COMPLETE:
- idx = MAIN_SCTP_SUB_CONN_IDX;
- break;
- default:
- idx = 0;
+ u32 sub = random_u32 (&data_subconn_seed) % MAX_SCTP_CONNECTIONS;
+ if (sctp_conn->sub_conn[sub].state == SCTP_SUBCONN_STATE_UP)
+ break;
+ i++;
}
- return idx;
+ return sub;
}
always_inline u8
-sctp_pick_conn_idx_on_state (sctp_state_t state)
+sctp_sub_conn_id_via_ip6h (sctp_connection_t * sctp_conn, ip6_header_t * ip6h)
{
- u8 idx = MAIN_SCTP_SUB_CONN_IDX;
+ u8 i;
- switch (state)
+ for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
{
- case SCTP_STATE_CLOSED:
- case SCTP_STATE_COOKIE_WAIT:
- case SCTP_STATE_COOKIE_ECHOED:
- case SCTP_STATE_ESTABLISHED:
- case SCTP_STATE_SHUTDOWN_PENDING:
- case SCTP_STATE_SHUTDOWN_SENT:
- case SCTP_STATE_SHUTDOWN_RECEIVED:
- case SCTP_STATE_SHUTDOWN_ACK_SENT:
- idx = MAIN_SCTP_SUB_CONN_IDX;
- default:
- idx = MAIN_SCTP_SUB_CONN_IDX;
+ if (sctp_conn->sub_conn[i].connection.lcl_ip.ip6.as_u64[0] ==
+ ip6h->dst_address.as_u64[0] &&
+ sctp_conn->sub_conn[i].connection.lcl_ip.ip6.as_u64[1] ==
+ ip6h->dst_address.as_u64[1] &&
+ sctp_conn->sub_conn[i].connection.rmt_ip.ip6.as_u64[0] ==
+ ip6h->src_address.as_u64[0] &&
+ sctp_conn->sub_conn[i].connection.rmt_ip.ip6.as_u64[1] ==
+ ip6h->src_address.as_u64[1])
+ return i;
+ }
+ clib_warning ("Did not find a sub-connection; defaulting to %u",
+ MAIN_SCTP_SUB_CONN_IDX);
+ return MAIN_SCTP_SUB_CONN_IDX;
+}
+
+always_inline u8
+sctp_sub_conn_id_via_ip4h (sctp_connection_t * sctp_conn, ip4_header_t * ip4h)
+{
+ u8 i;
+
+ for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
+ {
+ if (sctp_conn->sub_conn[i].connection.lcl_ip.ip4.as_u32 ==
+ ip4h->dst_address.as_u32
+ && sctp_conn->sub_conn[i].connection.rmt_ip.ip4.as_u32 ==
+ ip4h->src_address.as_u32)
+ return i;
}
- return idx;
+ clib_warning ("Did not find a sub-connection; defaulting to %u",
+ MAIN_SCTP_SUB_CONN_IDX);
+ return MAIN_SCTP_SUB_CONN_IDX;
}
/**