From 52851e6aa9304054fd1059c8dd284abf8e532bf2 Mon Sep 17 00:00:00 2001 From: Dave Barach Date: Mon, 7 Aug 2017 09:35:25 -0400 Subject: TCP proxy prototype - Clean up internal API client registration - Add proxy server - Add a reference count to the svm fifo Change-Id: I5ace1c85497062ed412d26ae76a9e6741af1e984 Signed-off-by: Dave Barach Signed-off-by: Florin Coras --- src/vnet/tcp/builtin_proxy.c | 599 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 599 insertions(+) create mode 100644 src/vnet/tcp/builtin_proxy.c (limited to 'src/vnet/tcp/builtin_proxy.c') diff --git a/src/vnet/tcp/builtin_proxy.c b/src/vnet/tcp/builtin_proxy.c new file mode 100644 index 00000000000..d8cfb11d315 --- /dev/null +++ b/src/vnet/tcp/builtin_proxy.c @@ -0,0 +1,599 @@ +/* +* Copyright (c) 2015-2017 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 +#include +#include +#include +#include + +builtin_proxy_main_t builtin_proxy_main; + +static void +delete_proxy_session (stream_session_t * s, int is_active_open) +{ + builtin_proxy_main_t *bpm = &builtin_proxy_main; + proxy_session_t *ps = 0; + vnet_disconnect_args_t _a, *a = &_a; + stream_session_t *active_open_session = 0; + stream_session_t *server_session = 0; + uword *p; + u64 handle; + + handle = stream_session_handle (s); + + clib_spinlock_lock_if_init (&bpm->sessions_lock); + if (is_active_open) + { + active_open_session = s; + + p = hash_get (bpm->proxy_session_by_active_open_handle, handle); + if (p == 0) + { + clib_warning ("proxy session for %s handle %lld (%llx) AWOL", + is_active_open ? "active open" : "server", + handle, handle); + } + else + { + ps = pool_elt_at_index (bpm->sessions, p[0]); + if (ps->vpp_server_handle != ~0) + server_session = stream_session_get_from_handle + (ps->vpp_server_handle); + else + server_session = 0; + } + } + else + { + server_session = s; + + p = hash_get (bpm->proxy_session_by_server_handle, handle); + if (p == 0) + { + clib_warning ("proxy session for %s handle %lld (%llx) AWOL", + is_active_open ? "active open" : "server", + handle, handle); + } + else + { + ps = pool_elt_at_index (bpm->sessions, p[0]); + if (ps->vpp_server_handle != ~0) + active_open_session = stream_session_get_from_handle + (ps->vpp_server_handle); + else + active_open_session = 0; + } + } + + if (ps) + { + if (CLIB_DEBUG > 0) + memset (ps, 0xFE, sizeof (*ps)); + pool_put (bpm->sessions, ps); + } + + clib_spinlock_unlock_if_init (&bpm->sessions_lock); + + if (active_open_session) + { + a->handle = stream_session_handle (active_open_session); + a->app_index = bpm->active_open_app_index; + hash_unset (bpm->proxy_session_by_active_open_handle, + stream_session_handle (active_open_session)); + vnet_disconnect_session (a); + } + + if (server_session) + { + a->handle = stream_session_handle (server_session); + a->app_index = bpm->server_app_index; + hash_unset (bpm->proxy_session_by_server_handle, + stream_session_handle (server_session)); + vnet_disconnect_session (a); + } +} + +static int +server_accept_callback (stream_session_t * s) +{ + builtin_proxy_main_t *bpm = &builtin_proxy_main; + + s->session_state = SESSION_STATE_READY; + + clib_spinlock_lock_if_init (&bpm->sessions_lock); + + return 0; +} + +static void +server_disconnect_callback (stream_session_t * s) +{ + delete_proxy_session (s, 0 /* is_active_open */ ); +} + +static void +server_reset_callback (stream_session_t * s) +{ + clib_warning ("Reset session %U", format_stream_session, s, 2); + delete_proxy_session (s, 0 /* is_active_open */ ); +} + +static int +server_connected_callback (u32 app_index, u32 api_context, + stream_session_t * s, u8 is_fail) +{ + clib_warning ("called..."); + return -1; +} + +static int +server_add_segment_callback (u32 client_index, + const u8 * seg_name, u32 seg_size) +{ + clib_warning ("called..."); + return -1; +} + +static int +server_redirect_connect_callback (u32 client_index, void *mp) +{ + clib_warning ("called..."); + return -1; +} + +static int +server_rx_callback (stream_session_t * s) +{ + u32 max_dequeue; + int actual_transfer __attribute__ ((unused)); + svm_fifo_t *tx_fifo, *rx_fifo; + builtin_proxy_main_t *bpm = &builtin_proxy_main; + u32 thread_index = vlib_get_thread_index (); + vnet_connect_args_t _a, *a = &_a; + proxy_session_t *ps; + int proxy_index; + uword *p; + svm_fifo_t *active_open_tx_fifo; + session_fifo_event_t evt; + + ASSERT (s->thread_index == thread_index); + + clib_spinlock_lock_if_init (&bpm->sessions_lock); + p = + hash_get (bpm->proxy_session_by_server_handle, stream_session_handle (s)); + + if (PREDICT_TRUE (p != 0)) + { + clib_spinlock_unlock_if_init (&bpm->sessions_lock); + active_open_tx_fifo = s->server_rx_fifo; + + /* + * Send event for active open tx fifo + */ + if (svm_fifo_set_event (active_open_tx_fifo)) + { + evt.fifo = active_open_tx_fifo; + evt.event_type = FIFO_EVENT_APP_TX; + if (unix_shared_memory_queue_add + (bpm->active_open_event_queue[thread_index], (u8 *) & evt, + 0 /* do wait for mutex */ )) + clib_warning ("failed to enqueue tx evt"); + } + } + else + { + rx_fifo = s->server_rx_fifo; + tx_fifo = s->server_tx_fifo; + + ASSERT (rx_fifo->master_thread_index == thread_index); + ASSERT (tx_fifo->master_thread_index == thread_index); + + max_dequeue = svm_fifo_max_dequeue (s->server_rx_fifo); + + if (PREDICT_FALSE (max_dequeue == 0)) + return 0; + + actual_transfer = svm_fifo_peek (rx_fifo, 0 /* relative_offset */ , + max_dequeue, + bpm->rx_buf[thread_index]); + + /* $$$ your message in this space: parse url, etc. */ + + memset (a, 0, sizeof (*a)); + + clib_spinlock_lock_if_init (&bpm->sessions_lock); + pool_get (bpm->sessions, ps); + memset (ps, 0, sizeof (*ps)); + ps->server_rx_fifo = rx_fifo; + ps->server_tx_fifo = tx_fifo; + ps->vpp_server_handle = stream_session_handle (s); + + proxy_index = ps - bpm->sessions; + + hash_set (bpm->proxy_session_by_server_handle, ps->vpp_server_handle, + proxy_index); + + clib_spinlock_unlock_if_init (&bpm->sessions_lock); + + a->uri = "tcp://6.0.2.2/23"; + a->api_context = proxy_index; + a->app_index = bpm->active_open_app_index; + a->mp = 0; + vnet_connect_uri (a); + } + + return 0; +} + +static session_cb_vft_t builtin_session_cb_vft = { + .session_accept_callback = server_accept_callback, + .session_disconnect_callback = server_disconnect_callback, + .session_connected_callback = server_connected_callback, + .add_segment_callback = server_add_segment_callback, + .redirect_connect_callback = server_redirect_connect_callback, + .builtin_server_rx_callback = server_rx_callback, + .session_reset_callback = server_reset_callback +}; + +static int +active_open_connected_callback (u32 app_index, u32 opaque, + stream_session_t * s, u8 is_fail) +{ + builtin_proxy_main_t *bpm = &builtin_proxy_main; + proxy_session_t *ps; + u8 thread_index = vlib_get_thread_index (); + session_fifo_event_t evt; + + if (is_fail) + { + clib_warning ("connection %d failed!", opaque); + return 0; + } + + /* + * Setup proxy session handle. + */ + clib_spinlock_lock_if_init (&bpm->sessions_lock); + + ps = pool_elt_at_index (bpm->sessions, opaque); + ps->vpp_active_open_handle = stream_session_handle (s); + + s->server_tx_fifo = ps->server_rx_fifo; + s->server_rx_fifo = ps->server_tx_fifo; + + /* + * Reset the active-open tx-fifo master indices so the active-open session + * will receive data, etc. + */ + s->server_tx_fifo->master_session_index = s->session_index; + s->server_tx_fifo->master_thread_index = s->thread_index; + + /* + * Account for the active-open session's use of the fifos + * so they won't disappear until the last session which uses + * them disappears + */ + s->server_tx_fifo->refcnt++; + s->server_rx_fifo->refcnt++; + + hash_set (bpm->proxy_session_by_active_open_handle, + ps->vpp_active_open_handle, opaque); + + clib_spinlock_unlock_if_init (&bpm->sessions_lock); + + /* + * Send event for active open tx fifo + */ + if (svm_fifo_set_event (s->server_tx_fifo)) + { + evt.fifo = s->server_tx_fifo; + evt.event_type = FIFO_EVENT_APP_TX; + if (unix_shared_memory_queue_add + (bpm->active_open_event_queue[thread_index], (u8 *) & evt, + 0 /* do wait for mutex */ )) + clib_warning ("failed to enqueue tx evt"); + } + + return 0; +} + +static void +active_open_reset_callback (stream_session_t * s) +{ + delete_proxy_session (s, 1 /* is_active_open */ ); +} + +static int +active_open_create_callback (stream_session_t * s) +{ + return 0; +} + +static void +active_open_disconnect_callback (stream_session_t * s) +{ + delete_proxy_session (s, 1 /* is_active_open */ ); +} + +static int +active_open_rx_callback (stream_session_t * s) +{ + builtin_proxy_main_t *bpm = &builtin_proxy_main; + session_fifo_event_t evt; + svm_fifo_t *server_rx_fifo; + u32 thread_index = vlib_get_thread_index (); + + server_rx_fifo = s->server_rx_fifo; + + /* + * Send event for server tx fifo + */ + if (svm_fifo_set_event (server_rx_fifo)) + { + evt.fifo = server_rx_fifo; + evt.event_type = FIFO_EVENT_APP_TX; + if (unix_shared_memory_queue_add + (bpm->server_event_queue[thread_index], (u8 *) & evt, + 0 /* do wait for mutex */ )) + clib_warning ("failed to enqueue server rx evt"); + } + + return 0; +} + +/* *INDENT-OFF* */ +static session_cb_vft_t builtin_clients = { + .session_reset_callback = active_open_reset_callback, + .session_connected_callback = active_open_connected_callback, + .session_accept_callback = active_open_create_callback, + .session_disconnect_callback = active_open_disconnect_callback, + .builtin_server_rx_callback = active_open_rx_callback +}; +/* *INDENT-ON* */ + + +static void +create_api_loopbacks (vlib_main_t * vm) +{ + builtin_proxy_main_t *bpm = &builtin_proxy_main; + api_main_t *am = &api_main; + vl_shmem_hdr_t *shmem_hdr; + + shmem_hdr = am->shmem_hdr; + bpm->vl_input_queue = shmem_hdr->vl_input_queue; + bpm->server_client_index = + vl_api_memclnt_create_internal ("proxy_server", bpm->vl_input_queue); + bpm->active_open_client_index = + vl_api_memclnt_create_internal ("proxy_active_open", bpm->vl_input_queue); +} + +static int +server_attach () +{ + builtin_proxy_main_t *bpm = &builtin_proxy_main; + u8 segment_name[128]; + u64 options[SESSION_OPTIONS_N_OPTIONS]; + vnet_app_attach_args_t _a, *a = &_a; + + memset (a, 0, sizeof (*a)); + memset (options, 0, sizeof (options)); + + a->api_client_index = bpm->server_client_index; + a->session_cb_vft = &builtin_session_cb_vft; + a->options = options; + a->options[SESSION_OPTIONS_SEGMENT_SIZE] = 512 << 20; + a->options[SESSION_OPTIONS_RX_FIFO_SIZE] = bpm->fifo_size; + a->options[SESSION_OPTIONS_TX_FIFO_SIZE] = bpm->fifo_size; + a->options[APP_OPTIONS_PRIVATE_SEGMENT_COUNT] = bpm->private_segment_count; + a->options[APP_OPTIONS_PRIVATE_SEGMENT_SIZE] = bpm->private_segment_size; + a->options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] = + bpm->prealloc_fifos ? bpm->prealloc_fifos : 1; + + a->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_BUILTIN_APP; + + a->segment_name = segment_name; + a->segment_name_length = ARRAY_LEN (segment_name); + + if (vnet_application_attach (a)) + { + clib_warning ("failed to attach server"); + return -1; + } + bpm->server_app_index = a->app_index; + + return 0; +} + +static int +active_open_attach (void) +{ + builtin_proxy_main_t *bpm = &builtin_proxy_main; + vnet_app_attach_args_t _a, *a = &_a; + u8 segment_name[128]; + u32 segment_name_length; + u64 options[16]; + + segment_name_length = ARRAY_LEN (segment_name); + + memset (a, 0, sizeof (*a)); + memset (options, 0, sizeof (options)); + + a->api_client_index = bpm->active_open_client_index; + a->segment_name = segment_name; + a->segment_name_length = segment_name_length; + a->session_cb_vft = &builtin_clients; + + options[SESSION_OPTIONS_ACCEPT_COOKIE] = 0x12345678; + options[SESSION_OPTIONS_SEGMENT_SIZE] = 512 << 20; + options[SESSION_OPTIONS_RX_FIFO_SIZE] = bpm->fifo_size; + options[SESSION_OPTIONS_TX_FIFO_SIZE] = bpm->fifo_size; + options[APP_OPTIONS_PRIVATE_SEGMENT_COUNT] = bpm->private_segment_count; + options[APP_OPTIONS_PRIVATE_SEGMENT_SIZE] = bpm->private_segment_size; + options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] = + bpm->prealloc_fifos ? bpm->prealloc_fifos : 1; + + options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_BUILTIN_APP + | APP_OPTIONS_FLAGS_IS_PROXY; + + a->options = options; + + if (vnet_application_attach (a)) + return -1; + + bpm->active_open_app_index = a->app_index; + + return 0; +} + +static int +server_listen () +{ + builtin_proxy_main_t *bpm = &builtin_proxy_main; + vnet_bind_args_t _a, *a = &_a; + memset (a, 0, sizeof (*a)); + a->app_index = bpm->server_app_index; + a->uri = "tcp://0.0.0.0/23"; + return vnet_bind_uri (a); +} + +static int +server_create (vlib_main_t * vm) +{ + builtin_proxy_main_t *bpm = &builtin_proxy_main; + vlib_thread_main_t *vtm = vlib_get_thread_main (); + u32 num_threads; + int i; + + if (bpm->server_client_index == (u32) ~ 0) + create_api_loopbacks (vm); + + num_threads = 1 /* main thread */ + vtm->n_threads; + vec_validate (builtin_proxy_main.server_event_queue, num_threads - 1); + vec_validate (builtin_proxy_main.active_open_event_queue, num_threads - 1); + vec_validate (bpm->rx_buf, num_threads - 1); + + for (i = 0; i < num_threads; i++) + vec_validate (bpm->rx_buf[i], bpm->rcv_buffer_size); + + if (server_attach ()) + { + clib_warning ("failed to attach server app"); + return -1; + } + if (server_listen ()) + { + clib_warning ("failed to start listening"); + return -1; + } + if (active_open_attach ()) + { + clib_warning ("failed to attach active open app"); + return -1; + } + + for (i = 0; i < num_threads; i++) + { + bpm->active_open_event_queue[i] = + session_manager_get_vpp_event_queue (i); + + ASSERT (bpm->active_open_event_queue[i]); + + bpm->server_event_queue[i] = session_manager_get_vpp_event_queue (i); + } + + return 0; +} + +static clib_error_t * +proxy_server_create_command_fn (vlib_main_t * vm, unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + builtin_proxy_main_t *bpm = &builtin_proxy_main; + int rv; + u32 tmp; + + bpm->fifo_size = 64 << 10; + bpm->rcv_buffer_size = 1024; + bpm->prealloc_fifos = 0; + bpm->private_segment_count = 0; + bpm->private_segment_size = 0; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "fifo-size %d", &bpm->fifo_size)) + bpm->fifo_size <<= 10; + else if (unformat (input, "rcv-buf-size %d", &bpm->rcv_buffer_size)) + ; + else if (unformat (input, "prealloc-fifos %d", &bpm->prealloc_fifos)) + ; + else if (unformat (input, "private-segment-count %d", + &bpm->private_segment_count)) + ; + else if (unformat (input, "private-segment-size %dm", &tmp)) + bpm->private_segment_size = tmp << 20; + else if (unformat (input, "private-segment-size %dg", &tmp)) + bpm->private_segment_size = tmp << 30; + else if (unformat (input, "private-segment-size %d", &tmp)) + bpm->private_segment_size = tmp; + else + return clib_error_return (0, "unknown input `%U'", + format_unformat_error, input); + } + + vnet_session_enable_disable (vm, 1 /* turn on TCP, etc. */ ); + + rv = server_create (vm); + switch (rv) + { + case 0: + break; + default: + return clib_error_return (0, "server_create returned %d", rv); + } + + return 0; +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (server_create_command, static) = +{ + .path = "test proxy server", + .short_help = "test proxy server", + .function = proxy_server_create_command_fn, +}; +/* *INDENT-ON* */ + +clib_error_t * +builtin_tcp_proxy_main_init (vlib_main_t * vm) +{ + builtin_proxy_main_t *bpm = &builtin_proxy_main; + bpm->server_client_index = ~0; + bpm->active_open_client_index = ~0; + bpm->proxy_session_by_active_open_handle = hash_create (0, sizeof (uword)); + bpm->proxy_session_by_server_handle = hash_create (0, sizeof (uword)); + + return 0; +} + +VLIB_INIT_FUNCTION (builtin_tcp_proxy_main_init); + +/* +* fd.io coding-style-patch-verification: ON +* +* Local Variables: +* eval: (c-set-style "gnu") +* End: +*/ -- cgit 1.2.3-korg