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authorFlorin Coras <fcoras@cisco.com>2021-05-13 08:36:56 -0700
committerDamjan Marion <dmarion@me.com>2021-05-14 08:44:47 +0000
commitbab6c52f4544ebe352a1a9f832137d9b4069ae6c (patch)
treea323f61fda3dc631981d74fad0f53749dad22989
parent9f07085ab37d9bc27d2f2ccc4d651d7295f9b33c (diff)
tls: switch dtls to vc and track half-opens
Also adds support for half-open support transport migration. Type: improvement Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: Id04c194138956336f93246bbed0332a7030c67e2
-rw-r--r--src/vnet/session/application_worker.c2
-rw-r--r--src/vnet/session/session.c79
-rw-r--r--src/vnet/session/session.h2
-rw-r--r--src/vnet/tls/tls.c63
4 files changed, 132 insertions, 14 deletions
diff --git a/src/vnet/session/application_worker.c b/src/vnet/session/application_worker.c
index fad70c06de3..0b2f1459d9a 100644
--- a/src/vnet/session/application_worker.c
+++ b/src/vnet/session/application_worker.c
@@ -396,7 +396,7 @@ int
app_worker_del_half_open (app_worker_t *app_wrk, session_t *s)
{
application_t *app = application_get (app_wrk->app_index);
- ASSERT (vlib_get_thread_index () == 0);
+ ASSERT (vlib_get_thread_index () <= 1);
pool_put_index (app_wrk->half_open_table, s->ho_index);
if (app->cb_fns.half_open_cleanup_callback)
app->cb_fns.half_open_cleanup_callback (s);
diff --git a/src/vnet/session/session.c b/src/vnet/session/session.c
index 0d2301c5f83..7aadb2188b4 100644
--- a/src/vnet/session/session.c
+++ b/src/vnet/session/session.c
@@ -303,21 +303,82 @@ session_delete (session_t * s)
void
session_cleanup_half_open (session_handle_t ho_handle)
{
- session_t *s = session_get_from_handle (ho_handle);
- transport_cleanup_half_open (session_get_transport_proto (s),
- s->connection_index);
+ session_t *ho = session_get_from_handle (ho_handle);
+
+ /* App transports can migrate their half-opens */
+ if (ho->flags & SESSION_F_IS_MIGRATING)
+ {
+ /* Session still migrating, move to closed state to signal that the
+ * session should be removed. */
+ if (ho->connection_index == ~0)
+ {
+ ho->session_state = SESSION_STATE_CLOSED;
+ return;
+ }
+ /* Migrated transports are no longer half-opens */
+ transport_cleanup (session_get_transport_proto (ho),
+ ho->connection_index, ho->app_index /* overloaded */);
+ return;
+ }
+ transport_cleanup_half_open (session_get_transport_proto (ho),
+ ho->connection_index);
+}
+
+static void
+session_half_open_free (u32 ho_index)
+{
+ app_worker_t *app_wrk;
+ session_t *ho;
+
+ ASSERT (vlib_get_thread_index () <= 1);
+ ho = ho_session_get (ho_index);
+ app_wrk = app_worker_get (ho->app_wrk_index);
+ app_worker_del_half_open (app_wrk, ho);
+ session_free (ho);
+}
+
+static void
+session_half_open_free_rpc (void *args)
+{
+ session_half_open_free (pointer_to_uword (args));
}
void
session_half_open_delete_notify (transport_connection_t *tc)
{
- app_worker_t *app_wrk;
- session_t *s;
+ void *args = uword_to_pointer ((uword) tc->s_index, void *);
+ u32 ctrl_thread = vlib_num_workers () ? 1 : 0;
+ session_send_rpc_evt_to_thread (ctrl_thread, session_half_open_free_rpc,
+ args);
+}
- s = ho_session_get (tc->s_index);
- app_wrk = app_worker_get (s->app_wrk_index);
- app_worker_del_half_open (app_wrk, s);
- session_free (s);
+void
+session_half_open_migrate_notify (transport_connection_t *tc)
+{
+ session_t *ho;
+
+ ho = ho_session_get (tc->s_index);
+ ho->flags |= SESSION_F_IS_MIGRATING;
+ ho->connection_index = ~0;
+}
+
+int
+session_half_open_migrated_notify (transport_connection_t *tc)
+{
+ session_t *ho;
+
+ ho = ho_session_get (tc->s_index);
+
+ /* App probably detached so the half-open must be cleaned up */
+ if (ho->session_state == SESSION_STATE_CLOSED)
+ {
+ session_half_open_delete_notify (tc);
+ return -1;
+ }
+ ho->connection_index = tc->c_index;
+ /* Overload app index for half-open with new thread */
+ ho->app_index = tc->thread_index;
+ return 0;
}
session_t *
diff --git a/src/vnet/session/session.h b/src/vnet/session/session.h
index d14c68971de..bf326811b24 100644
--- a/src/vnet/session/session.h
+++ b/src/vnet/session/session.h
@@ -506,6 +506,8 @@ int session_stream_accept_notify (transport_connection_t * tc);
void session_transport_closing_notify (transport_connection_t * tc);
void session_transport_delete_notify (transport_connection_t * tc);
void session_half_open_delete_notify (transport_connection_t *tc);
+void session_half_open_migrate_notify (transport_connection_t *tc);
+int session_half_open_migrated_notify (transport_connection_t *tc);
void session_transport_closed_notify (transport_connection_t * tc);
void session_transport_reset_notify (transport_connection_t * tc);
int session_stream_accept (transport_connection_t * tc, u32 listener_index,
diff --git a/src/vnet/tls/tls.c b/src/vnet/tls/tls.c
index 09fc8c62325..acaeb02f73c 100644
--- a/src/vnet/tls/tls.c
+++ b/src/vnet/tls/tls.c
@@ -234,6 +234,8 @@ tls_notify_app_connected (tls_ctx_t * ctx, session_error_t err)
if (ctx->tls_type == TRANSPORT_PROTO_DTLS)
{
session_type_t st;
+ /* Cleanup half-open session as we don't get notification from udp */
+ session_half_open_delete_notify (&ctx->connection);
app_session = session_alloc (ctx->c_thread_index);
app_session->session_state = SESSION_STATE_CREATED;
ctx->c_s_index = app_session->session_index;
@@ -647,6 +649,15 @@ dtls_migrate_ctx (void *arg)
us = session_get_from_handle (ctx->tls_session_handle);
us->opaque = ctx_handle;
us->flags &= ~SESSION_F_IS_MIGRATING;
+
+ /* Probably the app detached while the session was migrating. Cleanup */
+ if (session_half_open_migrated_notify (&ctx->connection))
+ {
+ ctx->no_app_session = 1;
+ tls_disconnect (ctx->tls_ctx_handle, vlib_get_thread_index ());
+ return;
+ }
+
if (svm_fifo_max_dequeue (us->tx_fifo))
session_send_io_evt_to_thread (us->tx_fifo, SESSION_IO_EVT_TX);
}
@@ -662,6 +673,7 @@ dtls_session_migrate_callback (session_t *us, session_handle_t new_sh)
ctx->tls_session_handle = new_sh;
cloned_ctx = tls_ctx_detach (ctx);
ctx->is_migrated = 1;
+ session_half_open_migrate_notify (&ctx->connection);
session_send_rpc_evt_to_thread (new_thread, dtls_migrate_ctx,
(void *) cloned_ctx);
@@ -905,10 +917,14 @@ static void
tls_cleanup_ho (u32 ho_index)
{
tls_main_t *tm = &tls_main;
+ session_handle_t tcp_sh;
tls_ctx_t *ctx;
+
ctx = tls_ctx_half_open_get (ho_index);
+ tcp_sh = ctx->tls_session_handle;
clib_rwlock_reader_unlock (&tm->half_open_rwlock);
- session_cleanup_half_open (ctx->tls_session_handle);
+ session_cleanup_half_open (tcp_sh);
+ tls_ctx_half_open_free (ho_index);
}
int
@@ -1182,6 +1198,8 @@ dtls_connect (transport_endpoint_cfg_t *tep)
ctx->ckpair_index = ccfg->ckpair_index;
ctx->tls_type = sep->transport_proto;
ctx->tls_ctx_handle = ctx_handle;
+ ctx->c_proto = TRANSPORT_PROTO_DTLS;
+ ctx->c_flags |= TRANSPORT_CONNECTION_F_NO_LOOKUP;
if (ccfg->hostname[0])
{
ctx->srv_hostname = format (0, "%s", ccfg->hostname);
@@ -1201,7 +1219,15 @@ dtls_connect (transport_endpoint_cfg_t *tep)
TLS_DBG (1, "New DTLS connect request %x engine %d", ctx_handle,
engine_type);
- return 0;
+ return ctx_handle;
+}
+
+static transport_connection_t *
+dtls_half_open_get (u32 ho_index)
+{
+ tls_ctx_t *ho_ctx;
+ ho_ctx = tls_ctx_get_w_thread (ho_index, 1 /* udp connects */);
+ return &ho_ctx->connection;
}
static void
@@ -1210,6 +1236,33 @@ dtls_cleanup_callback (u32 ctx_index, u32 thread_index)
/* No op */
}
+static void
+dtls_cleanup_ho (u32 ho_index)
+{
+ tls_ctx_t *ctx;
+ ctx = tls_ctx_get_w_thread (ho_index, 1 /* udp connects */);
+ tls_ctx_free (ctx);
+}
+
+u8 *
+format_dtls_half_open (u8 *s, va_list *args)
+{
+ u32 ho_index = va_arg (*args, u32);
+ u32 __clib_unused thread_index = va_arg (*args, u32);
+ tls_ctx_t *ho_ctx;
+ session_t *us;
+
+ ho_ctx = tls_ctx_get_w_thread (ho_index, 1 /* udp connects */);
+
+ us = session_get_from_handle (ho_ctx->tls_session_handle);
+ s = format (s, "[%d:%d][%s] half-open app_wrk %u engine %u us %d:%d",
+ ho_ctx->c_thread_index, ho_ctx->c_s_index, "DTLS",
+ ho_ctx->parent_app_wrk_index, ho_ctx->tls_ctx_engine,
+ us->thread_index, us->session_index);
+
+ return s;
+}
+
static const transport_proto_vft_t dtls_proto = {
.enable = 0,
.connect = dtls_connect,
@@ -1218,10 +1271,12 @@ static const transport_proto_vft_t dtls_proto = {
.stop_listen = tls_stop_listen,
.get_connection = tls_connection_get,
.get_listener = tls_listener_get,
+ .get_half_open = dtls_half_open_get,
.custom_tx = tls_custom_tx_callback,
.cleanup = dtls_cleanup_callback,
+ .cleanup_ho = dtls_cleanup_ho,
.format_connection = format_tls_connection,
- .format_half_open = format_tls_half_open,
+ .format_half_open = format_dtls_half_open,
.format_listener = format_tls_listener,
.get_transport_endpoint = tls_transport_endpoint_get,
.get_transport_listener_endpoint = tls_transport_listener_endpoint_get,
@@ -1229,7 +1284,7 @@ static const transport_proto_vft_t dtls_proto = {
.name = "dtls",
.short_name = "D",
.tx_type = TRANSPORT_TX_INTERNAL,
- .service_type = TRANSPORT_SERVICE_APP,
+ .service_type = TRANSPORT_SERVICE_VC,
},
};