src/plugins/http/http.h

   1 /*
   2  * Copyright (c) 2022 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #ifndef SRC_PLUGINS_HTTP_HTTP_H_
  17 #define SRC_PLUGINS_HTTP_HTTP_H_
  18
  19 #include <vnet/plugin/plugin.h>
  20 #include <vpp/app/version.h>
  21
  22 #include <vppinfra/time_range.h>
  23
  24 #include <vnet/session/application_interface.h>
  25 #include <vnet/session/application.h>
  26
  27 #define HTTP_DEBUG 0
  28
  29 #if HTTP_DEBUG
  30 #define HTTP_DBG(_lvl, _fmt, _args...)                                        \
  31   if (_lvl <= HTTP_DEBUG)                                                     \
  32   clib_warning (_fmt, ##_args)
  33 #else
  34 #define HTTP_DBG(_lvl, _fmt, _args...)
  35 #endif
  36
  37 typedef struct http_conn_id_
  38 {
  39   union
  40   {
  41     session_handle_t app_session_handle;
  42     u32 parent_app_api_ctx;
  43   };
  44   session_handle_t tc_session_handle;
  45   u32 parent_app_wrk_index;
  46 } http_conn_id_t;
  47
  48 STATIC_ASSERT (sizeof (http_conn_id_t) <= TRANSPORT_CONN_ID_LEN,
  49                "ctx id must be less than TRANSPORT_CONN_ID_LEN");
  50
  51 typedef enum http_state_
  52 {
  53   HTTP_CONN_STATE_LISTEN,
  54   HTTP_CONN_STATE_CONNECTING,
  55   HTTP_CONN_STATE_ESTABLISHED,
  56   HTTP_CONN_STATE_TRANSPORT_CLOSED,
  57   HTTP_CONN_STATE_APP_CLOSED,
  58   HTTP_CONN_STATE_CLOSED
  59 } http_conn_state_t;
  60
  61 typedef enum http_req_state_
  62 {
  63   HTTP_REQ_STATE_WAIT_METHOD,
  64   HTTP_REQ_STATE_WAIT_APP,
  65   HTTP_REQ_STATE_SEND_MORE_DATA,
  66   HTTP_REQ_N_STATES,
  67 } http_req_state_t;
  68
  69 typedef enum http_req_method_
  70 {
  71   HTTP_REQ_GET = 0,
  72   HTTP_REQ_POST,
  73 } http_req_method_t;
  74
  75 typedef enum http_msg_type_
  76 {
  77   HTTP_MSG_REQUEST,
  78   HTTP_MSG_REPLY
  79 } http_msg_type_t;
  80
  81 #define foreach_http_content_type                                             \
  82   _ (TEXT_HTML, "text/html")                                                  \
  83   _ (TEXT_CSS, "text/css")                                                    \
  84   _ (TEXT_JS, "text/javascript")                                              \
  85   _ (TEXT_JSON, "application/json")
  86
  87 typedef enum http_content_type_
  88 {
  89 #define _(s, str) HTTP_CONTENT_##s,
  90   foreach_http_content_type
  91 #undef _
  92 } http_content_type_t;
  93
  94 #define foreach_http_status_code                                              \
  95   _ (200, OK, "200 OK")                                                       \
  96   _ (400, BAD_REQUEST, "400 Bad Request")                                     \
  97   _ (405, METHOD_NOT_ALLOWED, "405 Method Not Allowed")                       \
  98   _ (500, INTERNAL_ERROR, "500 Internal Server Error")
  99
 100 typedef enum http_status_code_
 101 {
 102 #define _(c, s, str) HTTP_STATUS_##s,
 103   foreach_http_status_code
 104 #undef _
 105     HTTP_N_STATUS
 106 } http_status_code_t;
 107
 108 typedef struct http_msg_data_
 109 {
 110   http_content_type_t content_type;
 111   u32 len;
 112   u32 offset;
 113   u8 data[0];
 114 } http_msg_data_t;
 115
 116 typedef struct http_msg_
 117 {
 118   http_msg_type_t type;
 119   union
 120   {
 121     http_req_method_t method_type;
 122     http_status_code_t code;
 123   };
 124   http_msg_data_t data;
 125 } http_msg_t;
 126
 127 typedef struct http_buffer_
 128 {
 129   svm_fifo_t *src;
 130   svm_fifo_seg_t *segs;
 131   u32 len;
 132   u32 cur_seg;
 133   u32 offset;
 134 } http_buffer_t;
 135
 136 typedef struct http_tc_
 137 {
 138   union
 139   {
 140     transport_connection_t connection;
 141     http_conn_id_t c_http_conn_id;
 142   };
 143 #define h_tc_session_handle c_http_conn_id.tc_session_handle
 144 #define h_pa_wrk_index      c_http_conn_id.parent_app_wrk_index
 145 #define h_pa_session_handle c_http_conn_id.app_session_handle
 146 #define h_hc_index          connection.c_index
 147
 148   http_conn_state_t state;
 149   u32 timer_handle;
 150
 151   /*
 152    * Current request
 153    */
 154   http_req_state_t req_state;
 155   http_req_method_t method;
 156   u8 *rx_buf;
 157   u32 rx_buf_offset;
 158   http_buffer_t tx_buf;
 159 } http_conn_t;
 160
 161 typedef struct http_worker_
 162 {
 163   http_conn_t *conn_pool;
 164 } http_worker_t;
 165
 166 typedef struct http_main_
 167 {
 168   http_worker_t *wrk;
 169   http_conn_t *listener_ctx_pool;
 170   u32 app_index;
 171
 172   clib_timebase_t timebase;
 173
 174   /*
 175    * Runtime config
 176    */
 177   u8 debug_level;
 178
 179   /*
 180    * Config
 181    */
 182   u64 first_seg_size;
 183   u32 fifo_size;
 184 } http_main_t;
 185
 186 #endif /* SRC_PLUGINS_HTTP_HTTP_H_ */
 187
 188 /*
 189  * fd.io coding-style-patch-verification: ON
 190  *
 191  * Local Variables:
 192  * eval: (c-set-style "gnu")
 193  * End:
 194  */