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

MAINTAINERS

@@ -773,6 +773,11 @@ I:	hsi
 M:	Florin Coras <fcoras@cisco.com>
 F:	src/plugins/hsi/
 
+Plugin - HTTP
+I:	http
+M:	Florin Coras <fcoras@cisco.com>
+F:	src/plugins/http
+
 cJSON
 I:	cjson
 M:	Ole Troan <ot@cisco.com>

src/plugins/http/CMakeLists.txt

@@ -0,0 +1,18 @@
+# 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.
+
+add_vpp_plugin(http
+  SOURCES
+  http.c
+  http_timer.c
+)

src/plugins/http/http.h

@@ -0,0 +1,194 @@
+/*
+ * 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.
+ */
+
+#ifndef SRC_PLUGINS_HTTP_HTTP_H_
+#define SRC_PLUGINS_HTTP_HTTP_H_
+
+#include <vnet/plugin/plugin.h>
+#include <vpp/app/version.h>
+
+#include <vppinfra/time_range.h>
+
+#include <vnet/session/application_interface.h>
+#include <vnet/session/application.h>
+
+#define HTTP_DEBUG 0
+
+#if HTTP_DEBUG
+#define HTTP_DBG(_lvl, _fmt, _args...)                                        \
+  if (_lvl <= HTTP_DEBUG)                                                     \
+  clib_warning (_fmt, ##_args)
+#else
+#define HTTP_DBG(_lvl, _fmt, _args...)
+#endif
+
+typedef struct http_conn_id_
+{
+  union
+  {
+    session_handle_t app_session_handle;
+    u32 parent_app_api_ctx;
+  };
+  session_handle_t tc_session_handle;
+  u32 parent_app_wrk_index;
+} http_conn_id_t;
+
+STATIC_ASSERT (sizeof (http_conn_id_t) <= TRANSPORT_CONN_ID_LEN,
+	       "ctx id must be less than TRANSPORT_CONN_ID_LEN");
+
+typedef enum http_state_
+{
+  HTTP_CONN_STATE_LISTEN,
+  HTTP_CONN_STATE_CONNECTING,
+  HTTP_CONN_STATE_ESTABLISHED,
+  HTTP_CONN_STATE_TRANSPORT_CLOSED,
+  HTTP_CONN_STATE_APP_CLOSED,
+  HTTP_CONN_STATE_CLOSED
+} http_conn_state_t;
+
+typedef enum http_req_state_
+{
+  HTTP_REQ_STATE_WAIT_METHOD,
+  HTTP_REQ_STATE_WAIT_APP,
+  HTTP_REQ_STATE_SEND_MORE_DATA,
+  HTTP_REQ_N_STATES,
+} http_req_state_t;
+
+typedef enum http_req_method_
+{
+  HTTP_REQ_GET = 0,
+  HTTP_REQ_POST,
+} http_req_method_t;
+
+typedef enum http_msg_type_
+{
+  HTTP_MSG_REQUEST,
+  HTTP_MSG_REPLY
+} http_msg_type_t;
+
+#define foreach_http_content_type                                             \
+  _ (TEXT_HTML, "text/html")                                                  \
+  _ (TEXT_CSS, "text/css")                                                    \
+  _ (TEXT_JS, "text/javascript")                                              \
+  _ (TEXT_JSON, "application/json")
+
+typedef enum http_content_type_
+{
+#define _(s, str) HTTP_CONTENT_##s,
+  foreach_http_content_type
+#undef _
+} http_content_type_t;
+
+#define foreach_http_status_code                                              \
+  _ (200, OK, "200 OK")                                                       \
+  _ (400, BAD_REQUEST, "400 Bad Request")                                     \
+  _ (405, METHOD_NOT_ALLOWED, "405 Method Not Allowed")                       \
+  _ (500, INTERNAL_ERROR, "500 Internal Server Error")
+
+typedef enum http_status_code_
+{
+#define _(c, s, str) HTTP_STATUS_##s,
+  foreach_http_status_code
+#undef _
+    HTTP_N_STATUS
+} http_status_code_t;
+
+typedef struct http_msg_data_
+{
+  http_content_type_t content_type;
+  u32 len;
+  u32 offset;
+  u8 data[0];
+} http_msg_data_t;
+
+typedef struct http_msg_
+{
+  http_msg_type_t type;
+  union
+  {
+    http_req_method_t method_type;
+    http_status_code_t code;
+  };
+  http_msg_data_t data;
+} http_msg_t;
+
+typedef struct http_buffer_
+{
+  svm_fifo_t *src;
+  svm_fifo_seg_t *segs;
+  u32 len;
+  u32 cur_seg;
+  u32 offset;
+} http_buffer_t;
+
+typedef struct http_tc_
+{
+  union
+  {
+    transport_connection_t connection;
+    http_conn_id_t c_http_conn_id;
+  };
+#define h_tc_session_handle c_http_conn_id.tc_session_handle
+#define h_pa_wrk_index	    c_http_conn_id.parent_app_wrk_index
+#define h_pa_session_handle c_http_conn_id.app_session_handle
+#define h_hc_index	    connection.c_index
+
+  http_conn_state_t state;
+  u32 timer_handle;
+
+  /*
+   * Current request
+   */
+  http_req_state_t req_state;
+  http_req_method_t method;
+  u8 *rx_buf;
+  u32 rx_buf_offset;
+  http_buffer_t tx_buf;
+} http_conn_t;
+
+typedef struct http_worker_
+{
+  http_conn_t *conn_pool;
+} http_worker_t;
+
+typedef struct http_main_
+{
+  http_worker_t *wrk;
+  http_conn_t *listener_ctx_pool;
+  u32 app_index;
+
+  clib_timebase_t timebase;
+
+  /*
+   * Runtime config
+   */
+  u8 debug_level;
+
+  /*
+   * Config
+   */
+  u64 first_seg_size;
+  u32 fifo_size;
+} http_main_t;
+
+#endif /* SRC_PLUGINS_HTTP_HTTP_H_ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */

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:
+ */

src/plugins/http/http_timer.h

@@ -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.
+ */
+
+#ifndef SRC_PLUGINS_HTTP_HTTP_TIMER_H_
+#define SRC_PLUGINS_HTTP_HTTP_TIMER_H_
+
+#include <http/http.h>
+#include <vppinfra/tw_timer_2t_1w_2048sl.h>
+
+#define HTTP_CONN_TIMEOUT 60
+
+typedef void (http_conn_timeout_fn) (void *);
+
+typedef struct http_tw_ctx_
+{
+  tw_timer_wheel_2t_1w_2048sl_t tw;
+  clib_spinlock_t tw_lock;
+  http_conn_timeout_fn *cb_fn;
+} http_tw_ctx_t;
+
+extern http_tw_ctx_t http_tw_ctx;
+
+void http_timers_init (vlib_main_t *vm, http_conn_timeout_fn *cb_fn);
+
+static inline void
+http_conn_timer_start (http_conn_t *hc)
+{
+  http_tw_ctx_t *twc = &http_tw_ctx;
+  u32 hs_handle;
+  u64 timeout;
+
+  timeout = HTTP_CONN_TIMEOUT;
+  hs_handle = hc->c_thread_index << 24 | hc->c_c_index;
+
+  clib_spinlock_lock (&twc->tw_lock);
+  hc->timer_handle =
+    tw_timer_start_2t_1w_2048sl (&twc->tw, hs_handle, 0, timeout);
+  clib_spinlock_unlock (&twc->tw_lock);
+}
+
+static inline void
+http_conn_timer_stop (http_conn_t *hc)
+{
+  http_tw_ctx_t *twc = &http_tw_ctx;
+
+  if (hc->timer_handle == ~0)
+    return;
+
+  clib_spinlock_lock (&twc->tw_lock);
+  tw_timer_stop_2t_1w_2048sl (&twc->tw, hc->timer_handle);
+  hc->timer_handle = ~0;
+  clib_spinlock_unlock (&twc->tw_lock);
+}
+
+static inline void
+http_conn_timer_update (http_conn_t *hc)
+{
+  http_tw_ctx_t *twc = &http_tw_ctx;
+  u64 timeout;
+
+  if (hc->timer_handle == ~0)
+    return;
+
+  timeout = HTTP_CONN_TIMEOUT;
+
+  clib_spinlock_lock (&twc->tw_lock);
+  tw_timer_update_2t_1w_2048sl (&twc->tw, hc->timer_handle, timeout);
+  clib_spinlock_unlock (&twc->tw_lock);
+}
+
+#endif /* SRC_PLUGINS_HTTP_HTTP_TIMER_H_ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */

src/vnet/session/session.c

@@ -2000,7 +2000,7 @@ session_main_init (vlib_main_t * vm)
   smm->poll_main = 0;
   smm->use_private_rx_mqs = 0;
   smm->no_adaptive = 0;
-  smm->last_transport_proto_type = TRANSPORT_PROTO_SRTP;
+  smm->last_transport_proto_type = TRANSPORT_PROTO_HTTP;
 
   return 0;
 }

src/vnet/session/transport_types.h

@@ -21,10 +21,8 @@
 #include <vnet/tcp/tcp_debug.h>
 #include <vppinfra/bihash_24_8.h>
 
-
 #define TRANSPORT_MAX_HDRS_LEN    140	/* Max number of bytes for headers */
 
-
 typedef enum transport_dequeue_type_
 {
   TRANSPORT_TX_PEEK,		/**< reliable transport protos */
@@ -166,7 +164,8 @@ STATIC_ASSERT (sizeof (transport_connection_t) <= 128,
   _ (TLS, "tls", "J")                                                         \
   _ (QUIC, "quic", "Q")                                                       \
   _ (DTLS, "dtls", "D")                                                       \
-  _ (SRTP, "srtp", "R")
+  _ (SRTP, "srtp", "R")                                                       \
+  _ (HTTP, "http", "H")
 
 typedef enum _transport_proto
 {