src/plugins/hs_apps/sapi/vpp_echo_proto_tcp.c

   1 /*
   2  * Copyright (c) 2019 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 #include <stdio.h>
  17 #include <signal.h>
  18
  19 #include <hs_apps/sapi/vpp_echo_common.h>
  20
  21 static void
  22 tcp_echo_cleanup_cb (echo_session_t * s, u8 parent_died)
  23 {
  24   echo_main_t *em = &echo_main;
  25   echo_session_t *ls;
  26   ASSERT (s->session_state < ECHO_SESSION_STATE_CLOSED);
  27   if (parent_died)
  28     clib_atomic_fetch_add (&em->stats.clean_count.s, 1);
  29   else if (s->listener_index != SESSION_INVALID_INDEX)
  30     {
  31       ls = pool_elt_at_index (em->sessions, s->listener_index);
  32       clib_atomic_sub_fetch (&ls->accepted_session_count, 1);
  33     }
  34
  35
  36   clib_atomic_sub_fetch (&em->n_clients_connected, 1);
  37   s->session_state = ECHO_SESSION_STATE_CLOSED;
  38   if (!em->n_clients_connected)
  39     em->state = STATE_DATA_DONE;
  40 }
  41
  42 static void
  43 tcp_echo_connected_cb (session_connected_bundled_msg_t * mp,
  44                        u32 session_index, u8 is_failed)
  45 {
  46   static u32 client_index = 0;
  47   echo_main_t *em = &echo_main;
  48   echo_session_t *session = pool_elt_at_index (em->sessions, session_index);
  49   if (is_failed)
  50     {
  51       ECHO_FAIL (ECHO_FAIL_TCP_BAPI_CONNECT,
  52                  "Bapi connect errored on session %u", session_index);
  53       return;                   /* Dont handle bapi connect errors for now */
  54     }
  55
  56   ECHO_LOG (2, "Connected session 0x%lx -> URI",
  57             ((session_connected_msg_t *) mp)->handle);
  58   session->session_type = ECHO_SESSION_TYPE_STREAM;
  59   session->accepted_session_count = 0;
  60   clib_atomic_fetch_add (&em->n_clients_connected, 1);
  61   session->bytes_to_send = em->bytes_to_send;
  62   session->bytes_to_receive = em->bytes_to_receive;
  63   session->session_state = ECHO_SESSION_STATE_READY;
  64   em->data_thread_args[client_index++] = session->session_index;
  65
  66   if (em->n_clients_connected == em->n_clients && em->state < STATE_READY)
  67     {
  68       echo_notify_event (em, ECHO_EVT_LAST_SCONNECTED);
  69       em->state = STATE_READY;
  70     }
  71 }
  72
  73 static void
  74 tcp_echo_accepted_cb (session_accepted_msg_t * mp, echo_session_t * session)
  75 {
  76   static u32 client_index = 0;
  77   echo_main_t *em = &echo_main;
  78   echo_session_t *ls;
  79
  80   echo_notify_event (em, ECHO_EVT_FIRST_QCONNECT);
  81   ls = pool_elt_at_index (em->sessions, session->listener_index);
  82   session->session_type = ECHO_SESSION_TYPE_STREAM;
  83   echo_notify_event (em, ECHO_EVT_FIRST_SCONNECT);
  84   clib_atomic_fetch_add (&ls->accepted_session_count, 1);
  85   clib_atomic_fetch_add (&em->n_clients_connected, 1);
  86
  87   session->bytes_to_send = em->bytes_to_send;
  88   session->bytes_to_receive = em->bytes_to_receive;
  89   em->data_thread_args[client_index++] = session->session_index;
  90   session->session_state = ECHO_SESSION_STATE_READY;
  91
  92   if (em->n_clients_connected == em->n_clients && em->state < STATE_READY)
  93     {
  94       echo_notify_event (em, ECHO_EVT_LAST_SCONNECTED);
  95       em->state = STATE_READY;
  96     }
  97 }
  98
  99 static void
 100 tcp_echo_sent_disconnect_cb (echo_session_t * s)
 101 {
 102   s->session_state = ECHO_SESSION_STATE_CLOSING;
 103 }
 104
 105 static void
 106 tcp_echo_disconnected_cb (session_disconnected_msg_t * mp, echo_session_t * s)
 107 {
 108   echo_main_t *em = &echo_main;
 109   echo_session_print_stats (em, s);
 110   if (s->bytes_to_receive || s->bytes_to_send)
 111     s->session_state = ECHO_SESSION_STATE_AWAIT_DATA;
 112   else
 113     s->session_state = ECHO_SESSION_STATE_CLOSING;
 114   clib_atomic_fetch_add (&em->stats.close_count.s, 1);
 115 }
 116
 117 static void
 118 tcp_echo_reset_cb (session_reset_msg_t * mp, echo_session_t * s)
 119 {
 120   echo_main_t *em = &echo_main;
 121   clib_atomic_fetch_add (&em->stats.reset_count.s, 1);
 122   s->session_state = ECHO_SESSION_STATE_CLOSING;
 123 }
 124
 125 echo_proto_cb_vft_t echo_tcp_proto_cb_vft = {
 126   .disconnected_cb = tcp_echo_disconnected_cb,
 127   .connected_cb = tcp_echo_connected_cb,
 128   .accepted_cb = tcp_echo_accepted_cb,
 129   .reset_cb = tcp_echo_reset_cb,
 130   .sent_disconnect_cb = tcp_echo_sent_disconnect_cb,
 131   .cleanup_cb = tcp_echo_cleanup_cb,
 132 };
 133
 134 echo_proto_cb_vft_t echo_tls_proto_cb_vft = {
 135   .disconnected_cb = tcp_echo_disconnected_cb,
 136   .connected_cb = tcp_echo_connected_cb,
 137   .accepted_cb = tcp_echo_accepted_cb,
 138   .reset_cb = tcp_echo_reset_cb,
 139   .sent_disconnect_cb = tcp_echo_sent_disconnect_cb,
 140   .cleanup_cb = tcp_echo_cleanup_cb,
 141 };
 142
 143 ECHO_REGISTER_PROTO (TRANSPORT_PROTO_TCP, echo_tcp_proto_cb_vft);
 144 ECHO_REGISTER_PROTO (TRANSPORT_PROTO_TLS, echo_tls_proto_cb_vft);
 145 ECHO_REGISTER_PROTO (TRANSPORT_PROTO_SCTP, echo_tcp_proto_cb_vft);
 146
 147 /*
 148  * fd.io coding-style-patch-verification: ON
 149  *
 150  * Local Variables:
 151  * eval: (c-set-style "gnu")
 152  * End:
 153  */