http: add http protocol plugin

Basic HTTP/1.1 server side implementation.

Type: feature

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: I06bddaf7f11e28db802b4cd7ef8160c78cb019b6

src/plugins/http/http_timer.c

@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2022 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.
+ */
+
+#include <http/http_timer.h>
+#include <vnet/session/session.h>
+
+http_tw_ctx_t http_tw_ctx;
+
+static void
+http_timer_process_expired_cb (u32 *expired_timers)
+{
+  http_tw_ctx_t *twc = &http_tw_ctx;
+  u32 hs_handle;
+  int i;
+
+  for (i = 0; i < vec_len (expired_timers); i++)
+    {
+      /* Get session handle. The first bit is the timer id */
+      hs_handle = expired_timers[i] & 0x7FFFFFFF;
+      session_send_rpc_evt_to_thread (hs_handle >> 24, twc->cb_fn,
+				      uword_to_pointer (hs_handle, void *));
+    }
+}
+
+static uword
+http_timer_process (vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f)
+{
+  http_tw_ctx_t *twc = &http_tw_ctx;
+  f64 now, timeout = 1.0;
+  uword *event_data = 0;
+  uword __clib_unused event_type;
+
+  while (1)
+    {
+      vlib_process_wait_for_event_or_clock (vm, timeout);
+      now = vlib_time_now (vm);
+      event_type = vlib_process_get_events (vm, (uword **) &event_data);
+
+      /* expire timers */
+      clib_spinlock_lock (&twc->tw_lock);
+      tw_timer_expire_timers_2t_1w_2048sl (&twc->tw, now);
+      clib_spinlock_unlock (&twc->tw_lock);
+
+      vec_reset_length (event_data);
+    }
+  return 0;
+}
+
+VLIB_REGISTER_NODE (http_timer_process_node) = {
+  .function = http_timer_process,
+  .type = VLIB_NODE_TYPE_PROCESS,
+  .name = "http-timer-process",
+  .state = VLIB_NODE_STATE_DISABLED,
+};
+
+void
+http_timers_init (vlib_main_t *vm, http_conn_timeout_fn *cb_fn)
+{
+  http_tw_ctx_t *twc = &http_tw_ctx;
+  vlib_node_t *n;
+
+  tw_timer_wheel_init_2t_1w_2048sl (&twc->tw, http_timer_process_expired_cb,
+				    1.0 /* timer interval */, ~0);
+  clib_spinlock_init (&twc->tw_lock);
+  twc->cb_fn = cb_fn;
+
+  vlib_node_set_state (vm, http_timer_process_node.index,
+		       VLIB_NODE_STATE_POLLING);
+  n = vlib_get_node (vm, http_timer_process_node.index);
+  vlib_start_process (vm, n->runtime_index);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */