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authorFlorin Coras <fcoras@cisco.com>2018-04-09 09:24:52 -0700
committerDamjan Marion <dmarion.lists@gmail.com>2018-04-18 07:23:46 +0000
commit7fb0fe1f6972a7a35146fa9115b866ba29a6fbb7 (patch)
tree46f1236450ae918383bf56204b98a68199d28501 /src/vnet/udp
parent684d08c7e5378af5310346e9219a79ef1d901084 (diff)
udp/session: refactor to support dgram mode
- adds session layer support for datagram based protocols - updates udp to work in pure connectionless and datagram mode. The existing connected mode is now 'accessible' for apps as a dummy UDPC, as in, connected udp, protocol. - updates udp_echo, echo client, echo server code to work in datagram mode. Change-Id: I2960c0d2d246cb166005f545794ec31fe0d546dd Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/vnet/udp')
-rw-r--r--src/vnet/udp/udp.c56
-rw-r--r--src/vnet/udp/udp.h8
-rw-r--r--src/vnet/udp/udp_input.c180
3 files changed, 172 insertions, 72 deletions
diff --git a/src/vnet/udp/udp.c b/src/vnet/udp/udp.c
index 3b8b707abe1..947cc1e38e1 100644
--- a/src/vnet/udp/udp.c
+++ b/src/vnet/udp/udp.c
@@ -49,6 +49,7 @@ udp_connection_alloc (u32 thread_index)
uc->c_c_index = uc - um->connections[thread_index];
uc->c_thread_index = thread_index;
uc->c_proto = TRANSPORT_PROTO_UDP;
+ clib_spinlock_init (&uc->rx_lock);
return uc;
}
@@ -92,6 +93,7 @@ udp_session_bind (u32 session_index, transport_endpoint_t * lcl)
listener->c_proto = TRANSPORT_PROTO_UDP;
listener->c_s_index = session_index;
listener->c_fib_index = lcl->fib_index;
+ clib_spinlock_init (&listener->rx_lock);
node_index = lcl->is_ip4 ? udp4_input_node.index : udp6_input_node.index;
udp_register_dst_port (vm, clib_net_to_host_u16 (lcl->port), node_index,
@@ -140,7 +142,7 @@ udp_push_header (transport_connection_t * tc, vlib_buffer_t * b)
vnet_buffer (b)->l3_hdr_offset = (u8 *) ih - b->data;
}
vnet_buffer (b)->sw_if_index[VLIB_RX] = 0;
- vnet_buffer (b)->sw_if_index[VLIB_TX] = ~0;
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = uc->c_fib_index;
b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
return 0;
@@ -210,7 +212,7 @@ format_udp_connection (u8 * s, va_list * args)
if (verbose)
{
if (verbose == 1)
- s = format (s, "%-15s", "-");
+ s = format (s, "%-15s\n", "-");
else
s = format (s, "\n");
}
@@ -322,8 +324,52 @@ const static transport_proto_vft_t udp_proto = {
.format_connection = format_udp_session,
.format_half_open = format_udp_half_open_session,
.format_listener = format_udp_listener_session,
+ .tx_type = TRANSPORT_TX_DGRAM,
+ .service_type = TRANSPORT_SERVICE_CL,
+};
+/* *INDENT-ON* */
+
+
+int
+udpc_connection_open (transport_endpoint_t * rmt)
+{
+ udp_connection_t *uc;
+ u32 uc_index;
+ uc_index = udp_open_connection (rmt);
+ uc = udp_connection_get (uc_index, vlib_get_thread_index ());
+ uc->is_connected = 1;
+ return uc_index;
+}
+
+u32
+udpc_connection_listen (u32 session_index, transport_endpoint_t * lcl)
+{
+ udp_connection_t *listener;
+ u32 li;
+ li = udp_session_bind (session_index, lcl);
+ listener = udp_listener_get (li);
+ listener->is_connected = 1;
+ return li;
+}
+
+/* *INDENT-OFF* */
+const static transport_proto_vft_t udpc_proto = {
+ .bind = udpc_connection_listen,
+ .open = udpc_connection_open,
+ .unbind = udp_session_unbind,
+ .push_header = udp_push_header,
+ .get_connection = udp_session_get,
+ .get_listener = udp_session_get_listener,
+ .get_half_open = udp_half_open_session_get_transport,
+ .close = udp_session_close,
+ .cleanup = udp_session_cleanup,
+ .send_mss = udp_send_mss,
+ .send_space = udp_send_space,
+ .format_connection = format_udp_session,
+ .format_half_open = format_udp_half_open_session,
+ .format_listener = format_udp_listener_session,
.tx_type = TRANSPORT_TX_DEQUEUE,
- .service_type = TRANSPORT_SERVICE_VC,
+ .service_type = TRANSPORT_SERVICE_CL,
};
/* *INDENT-ON* */
@@ -361,6 +407,10 @@ udp_init (vlib_main_t * vm)
FIB_PROTOCOL_IP4, ip4_lookup_node.index);
transport_register_protocol (TRANSPORT_PROTO_UDP, &udp_proto,
FIB_PROTOCOL_IP6, ip6_lookup_node.index);
+ transport_register_protocol (TRANSPORT_PROTO_UDPC, &udpc_proto,
+ FIB_PROTOCOL_IP4, ip4_lookup_node.index);
+ transport_register_protocol (TRANSPORT_PROTO_UDPC, &udpc_proto,
+ FIB_PROTOCOL_IP6, ip6_lookup_node.index);
/*
* Initialize data structures
diff --git a/src/vnet/udp/udp.h b/src/vnet/udp/udp.h
index af6c6b82c6a..8e3ab9ec59e 100644
--- a/src/vnet/udp/udp.h
+++ b/src/vnet/udp/udp.h
@@ -36,9 +36,9 @@ typedef enum
typedef struct
{
- transport_connection_t connection; /** must be first */
- /** ersatz MTU to limit fifo pushes to test data size */
- u32 mtu;
+ transport_connection_t connection; /**< must be first */
+ clib_spinlock_t rx_lock; /**< rx fifo lock */
+ u8 is_connected; /**< connected mode */
} udp_connection_t;
#define foreach_udp4_dst_port \
@@ -207,7 +207,7 @@ udp_pool_remove_peeker (u32 thread_index)
}
always_inline udp_connection_t *
-udp_conenction_clone_safe (u32 connection_index, u32 thread_index)
+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 ();
diff --git a/src/vnet/udp/udp_input.c b/src/vnet/udp/udp_input.c
index 8170cfbe49a..ad469f69667 100644
--- a/src/vnet/udp/udp_input.c
+++ b/src/vnet/udp/udp_input.c
@@ -13,20 +13,19 @@
* limitations under the License.
*/
+#include <vlibmemory/api.h>
#include <vlib/vlib.h>
-#include <vnet/vnet.h>
-#include <vnet/pg/pg.h>
-#include <vnet/ip/ip.h>
-#include <vnet/udp/udp.h>
#include <vppinfra/hash.h>
#include <vppinfra/error.h>
#include <vppinfra/elog.h>
+#include <vnet/vnet.h>
+#include <vnet/pg/pg.h>
+#include <vnet/ip/ip.h>
+#include <vnet/udp/udp.h>
#include <vnet/udp/udp_packet.h>
-
-#include <vlibmemory/api.h>
-#include "../session/application_interface.h"
+#include <vnet/session/session.h>
static char *udp_error_strings[] = {
#define udp_error(n,s) s,
@@ -106,9 +105,11 @@ udp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
ip6_header_t *ip60;
u8 *data0;
stream_session_t *s0;
- transport_connection_t *tc0 = 0;
- udp_connection_t *child0, *new_uc0;
- int written0;
+ udp_connection_t *uc0, *child0, *new_uc0;
+ transport_connection_t *tc0;
+ int wrote0;
+ void *rmt_addr, *lcl_addr;
+ session_dgram_hdr_t hdr0;
/* speculatively enqueue b0 to the current next frame */
bi0 = from[0];
@@ -127,11 +128,14 @@ udp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
if (is_ip4)
{
- /* $$$$ fixme: udp_local doesn't do ip options correctly anyhow */
+ /* TODO: must fix once udp_local does ip options correctly */
ip40 = (ip4_header_t *) (((u8 *) udp0) - sizeof (*ip40));
s0 = session_lookup_safe4 (fib_index0, &ip40->dst_address,
&ip40->src_address, udp0->dst_port,
udp0->src_port, TRANSPORT_PROTO_UDP);
+ lcl_addr = &ip40->dst_address;
+ rmt_addr = &ip40->src_address;
+
}
else
{
@@ -139,67 +143,83 @@ udp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
s0 = session_lookup_safe6 (fib_index0, &ip60->dst_address,
&ip60->src_address, udp0->dst_port,
udp0->src_port, TRANSPORT_PROTO_UDP);
+ lcl_addr = &ip60->dst_address;
+ rmt_addr = &ip60->src_address;
}
- if (PREDICT_FALSE (s0 == 0))
+ if (PREDICT_FALSE (!s0))
{
error0 = UDP_ERROR_NO_LISTENER;
goto trace0;
}
- if (PREDICT_TRUE (s0->session_state == SESSION_STATE_READY))
+ if (s0->session_state == SESSION_STATE_OPENED)
{
+ /* TODO optimization: move cl session to right thread
+ * However, since such a move would affect the session handle,
+ * which we pass 'raw' to the app, we'd also have notify the
+ * app of the change or change the way we pass handles to apps.
+ */
tc0 = session_get_transport (s0);
+ uc0 = udp_get_connection_from_transport (tc0);
+ if (uc0->is_connected)
+ {
+ /*
+ * Clone the transport. It will be cleaned up with the
+ * session once we notify the session layer.
+ */
+ new_uc0 = udp_connection_clone_safe (s0->connection_index,
+ s0->thread_index);
+ ASSERT (s0->session_index == new_uc0->c_s_index);
+
+ /*
+ * Drop the 'lock' on pool resize
+ */
+ session_pool_remove_peeker (s0->thread_index);
+ session_dgram_connect_notify (&new_uc0->connection,
+ s0->thread_index, &s0);
+ tc0 = &new_uc0->connection;
+ }
}
- else if (s0->session_state == SESSION_STATE_CONNECTING_READY)
+ else if (s0->session_state == SESSION_STATE_READY)
{
- /*
- * Clone the transport. It will be cleaned up with the
- * session once we notify the session layer.
- */
- new_uc0 = udp_conenction_clone_safe (s0->connection_index,
- s0->thread_index);
- ASSERT (s0->session_index == new_uc0->c_s_index);
-
- /*
- * Drop the 'lock' on pool resize
- */
- session_pool_remove_peeker (s0->thread_index);
- session_dgram_connect_notify (&new_uc0->connection,
- s0->thread_index, &s0);
- tc0 = &new_uc0->connection;
+ tc0 = session_get_transport (s0);
+ uc0 = udp_get_connection_from_transport (tc0);
}
else if (s0->session_state == SESSION_STATE_LISTENING)
{
tc0 = listen_session_get_transport (s0);
-
- child0 = udp_connection_alloc (my_thread_index);
- if (is_ip4)
- {
- ip_set (&child0->c_lcl_ip, &ip40->dst_address, 1);
- ip_set (&child0->c_rmt_ip, &ip40->src_address, 1);
- }
- else
- {
- ip_set (&child0->c_lcl_ip, &ip60->dst_address, 0);
- ip_set (&child0->c_rmt_ip, &ip60->src_address, 0);
- }
- child0->c_lcl_port = udp0->dst_port;
- child0->c_rmt_port = udp0->src_port;
- child0->c_is_ip4 = is_ip4;
- child0->mtu = 1460; /* $$$$ policy */
-
- if (stream_session_accept
- (&child0->connection, tc0->s_index, 1))
+ uc0 = udp_get_connection_from_transport (tc0);
+ if (uc0->is_connected)
{
- error0 = UDP_ERROR_CREATE_SESSION;
- goto trace0;
+ child0 = udp_connection_alloc (my_thread_index);
+ if (is_ip4)
+ {
+ ip_set (&child0->c_lcl_ip, &ip40->dst_address, 1);
+ ip_set (&child0->c_rmt_ip, &ip40->src_address, 1);
+ }
+ else
+ {
+ ip_set (&child0->c_lcl_ip, &ip60->dst_address, 0);
+ ip_set (&child0->c_rmt_ip, &ip60->src_address, 0);
+ }
+ child0->c_lcl_port = udp0->dst_port;
+ child0->c_rmt_port = udp0->src_port;
+ child0->c_is_ip4 = is_ip4;
+
+ if (stream_session_accept (&child0->connection,
+ tc0->s_index, 1))
+ {
+ error0 = UDP_ERROR_CREATE_SESSION;
+ goto trace0;
+ }
+ s0 =
+ session_get (child0->c_s_index, child0->c_thread_index);
+ s0->session_state = SESSION_STATE_READY;
+ tc0 = &child0->connection;
+ uc0 = udp_get_connection_from_transport (tc0);
+ error0 = UDP_ERROR_LISTENER;
}
- s0 = session_get (child0->c_s_index, child0->c_thread_index);
- s0->session_state = SESSION_STATE_READY;
- tc0 = &child0->connection;
-
- error0 = UDP_ERROR_LISTENER;
}
else
{
@@ -207,15 +227,48 @@ udp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
goto trace0;
}
- written0 = session_enqueue_dgram_connection (s0, b0, tc0->proto,
- 1 /* queue evt */ );
- if (PREDICT_FALSE (written0 < 0))
+ if (!uc0->is_connected)
{
- error0 = UDP_ERROR_FIFO_FULL;
- goto trace0;
+ if (svm_fifo_max_enqueue (s0->server_rx_fifo)
+ < b0->current_length + sizeof (session_dgram_hdr_t))
+ {
+ error0 = UDP_ERROR_FIFO_FULL;
+ goto trace0;
+ }
+ hdr0.data_length = b0->current_length;
+ hdr0.data_offset = 0;
+ ip_set (&hdr0.lcl_ip, lcl_addr, is_ip4);
+ ip_set (&hdr0.rmt_ip, rmt_addr, is_ip4);
+ hdr0.lcl_port = udp0->dst_port;
+ hdr0.rmt_port = udp0->src_port;
+ hdr0.is_ip4 = is_ip4;
+
+ clib_spinlock_lock (&uc0->rx_lock);
+ wrote0 = session_enqueue_dgram_connection (s0, &hdr0, b0,
+ TRANSPORT_PROTO_UDP,
+ 1 /* queue evt */ );
+ clib_spinlock_unlock (&uc0->rx_lock);
+ ASSERT (wrote0 > 0);
+
+ if (s0->session_state != SESSION_STATE_LISTENING)
+ session_pool_remove_peeker (s0->thread_index);
+ }
+ else
+ {
+ if (svm_fifo_max_enqueue (s0->server_rx_fifo)
+ < b0->current_length)
+ {
+ error0 = UDP_ERROR_FIFO_FULL;
+ goto trace0;
+ }
+ wrote0 = session_enqueue_stream_connection (tc0, b0, 0,
+ 1 /* queue evt */ ,
+ 1 /* in order */ );
+ ASSERT (wrote0 > 0);
}
trace0:
+
b0->error = node->errors[error0];
if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
@@ -224,7 +277,7 @@ udp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
udp_input_trace_t *t = vlib_add_trace (vm, node, b0,
sizeof (*t));
- t->connection = tc0 ? tc0->c_index : ~0;
+ t->connection = s0 ? s0->connection_index : ~0;
t->disposition = error0;
t->thread_index = my_thread_index;
}
@@ -237,14 +290,11 @@ udp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
- errors = session_manager_flush_enqueue_events (TRANSPORT_PROTO_UDP,
- my_thread_index);
+ errors = session_manager_flush_all_enqueue_events (TRANSPORT_PROTO_UDP);
udp_input_inc_counter (vm, is_ip4, UDP_ERROR_EVENT_FIFO_FULL, errors);
return frame->n_vectors;
}
-vlib_node_registration_t udp4_input_node;
-vlib_node_registration_t udp6_input_node;
static uword
udp4_input (vlib_main_t * vm, vlib_node_runtime_t * node,