From 68b0fb0c620c7451ef1a6380c43c39de6614db51 Mon Sep 17 00:00:00 2001 From: Dave Barach Date: Tue, 28 Feb 2017 15:15:56 -0500 Subject: VPP-598: tcp stack initial commit Change-Id: I49e5ce0aae6e4ff634024387ceaf7dbc432a0351 Signed-off-by: Dave Barach Signed-off-by: Florin Coras --- src/vnet/session/application.c | 343 ++++++++ src/vnet/session/application.h | 120 +++ src/vnet/session/application_interface.c | 459 +++++++++++ src/vnet/session/application_interface.h | 136 ++++ src/vnet/session/hashes.c | 28 + src/vnet/session/node.c | 435 ++++++++++ src/vnet/session/session.api | 429 ++++++++++ src/vnet/session/session.c | 1286 ++++++++++++++++++++++++++++++ src/vnet/session/session.h | 380 +++++++++ src/vnet/session/session_api.c | 821 +++++++++++++++++++ src/vnet/session/session_cli.c | 189 +++++ src/vnet/session/transport.c | 64 ++ src/vnet/session/transport.h | 250 ++++++ 13 files changed, 4940 insertions(+) create mode 100644 src/vnet/session/application.c create mode 100644 src/vnet/session/application.h create mode 100644 src/vnet/session/application_interface.c create mode 100644 src/vnet/session/application_interface.h create mode 100644 src/vnet/session/hashes.c create mode 100644 src/vnet/session/node.c create mode 100644 src/vnet/session/session.api create mode 100644 src/vnet/session/session.c create mode 100644 src/vnet/session/session.h create mode 100644 src/vnet/session/session_api.c create mode 100644 src/vnet/session/session_cli.c create mode 100644 src/vnet/session/transport.c create mode 100644 src/vnet/session/transport.h (limited to 'src/vnet/session') diff --git a/src/vnet/session/application.c b/src/vnet/session/application.c new file mode 100644 index 00000000000..a561e7d17f0 --- /dev/null +++ b/src/vnet/session/application.c @@ -0,0 +1,343 @@ +/* + * Copyright (c) 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 + +/* + * Pool from which we allocate all applications + */ +static application_t *app_pool; + +/* + * Hash table of apps by api client index + */ +static uword *app_by_api_client_index; + +int +application_api_queue_is_full (application_t * app) +{ + unix_shared_memory_queue_t *q; + + /* builtin servers are always OK */ + if (app->api_client_index == ~0) + return 0; + + q = vl_api_client_index_to_input_queue (app->api_client_index); + if (!q) + return 1; + + if (q->cursize == q->maxsize) + return 1; + return 0; +} + +static void +application_table_add (application_t * app) +{ + hash_set (app_by_api_client_index, app->api_client_index, app->index); +} + +static void +application_table_del (application_t * app) +{ + hash_unset (app_by_api_client_index, app->api_client_index); +} + +application_t * +application_lookup (u32 api_client_index) +{ + uword *p; + p = hash_get (app_by_api_client_index, api_client_index); + if (p) + return application_get (p[0]); + + return 0; +} + +void +application_del (application_t * app) +{ + session_manager_main_t *smm = vnet_get_session_manager_main (); + api_main_t *am = &api_main; + void *oldheap; + session_manager_t *sm; + + if (app->mode == APP_SERVER) + { + sm = session_manager_get (app->session_manager_index); + session_manager_del (smm, sm); + } + + /* Free the event fifo in the /vpe-api shared-memory segment */ + oldheap = svm_push_data_heap (am->vlib_rp); + if (app->event_queue) + unix_shared_memory_queue_free (app->event_queue); + svm_pop_heap (oldheap); + + application_table_del (app); + + pool_put (app_pool, app); +} + +application_t * +application_new (application_type_t type, session_type_t sst, + u32 api_client_index, u32 flags, session_cb_vft_t * cb_fns) +{ + session_manager_main_t *smm = vnet_get_session_manager_main (); + api_main_t *am = &api_main; + application_t *app; + void *oldheap; + session_manager_t *sm; + + pool_get (app_pool, app); + memset (app, 0, sizeof (*app)); + + /* Allocate event fifo in the /vpe-api shared-memory segment */ + oldheap = svm_push_data_heap (am->vlib_rp); + + /* Allocate server event queue */ + app->event_queue = + unix_shared_memory_queue_init (128 /* nels $$$$ config */ , + sizeof (session_fifo_event_t), + 0 /* consumer pid */ , + 0 + /* (do not) signal when queue non-empty */ + ); + + svm_pop_heap (oldheap); + + /* If a server, allocate session manager */ + if (type == APP_SERVER) + { + pool_get (smm->session_managers, sm); + memset (sm, 0, sizeof (*sm)); + + app->session_manager_index = sm - smm->session_managers; + } + else if (type == APP_CLIENT) + { + /* Allocate connect session manager if needed */ + if (smm->connect_manager_index[sst] == INVALID_INDEX) + connects_session_manager_init (smm, sst); + app->session_manager_index = smm->connect_manager_index[sst]; + } + + app->mode = type; + app->index = application_get_index (app); + app->session_type = sst; + app->api_client_index = api_client_index; + app->flags = flags; + app->cb_fns = *cb_fns; + + /* Add app to lookup by api_client_index table */ + application_table_add (app); + + return app; +} + +application_t * +application_get (u32 index) +{ + return pool_elt_at_index (app_pool, index); +} + +u32 +application_get_index (application_t * app) +{ + return app - app_pool; +} + +int +application_server_init (application_t * server, u32 segment_size, + u32 add_segment_size, u32 rx_fifo_size, + u32 tx_fifo_size, u8 ** segment_name) +{ + session_manager_main_t *smm = vnet_get_session_manager_main (); + session_manager_t *sm; + int rv; + + sm = session_manager_get (server->session_manager_index); + + /* Add first segment */ + if ((rv = session_manager_add_first_segment (smm, sm, segment_size, + segment_name))) + { + return rv; + } + + /* Setup session manager */ + sm->add_segment_size = add_segment_size; + sm->rx_fifo_size = rx_fifo_size; + sm->tx_fifo_size = tx_fifo_size; + sm->add_segment = sm->add_segment_size != 0; + return 0; +} + +u8 * +format_application_server (u8 * s, va_list * args) +{ + application_t *srv = va_arg (*args, application_t *); + int verbose = va_arg (*args, int); + vl_api_registration_t *regp; + stream_session_t *listener; + u8 *server_name, *str, *seg_name; + u32 segment_size; + + if (srv == 0) + { + if (verbose) + s = format (s, "%-40s%-20s%-15s%-15s%-10s", "Connection", "Server", + "Segment", "API Client", "Cookie"); + else + s = format (s, "%-40s%-20s", "Connection", "Server"); + + return s; + } + + regp = vl_api_client_index_to_registration (srv->api_client_index); + if (!regp) + server_name = format (0, "%s%c", regp->name, 0); + else + server_name = regp->name; + + listener = stream_session_listener_get (srv->session_type, + srv->session_index); + str = format (0, "%U", format_stream_session, listener, verbose); + + session_manager_get_segment_info (listener->server_segment_index, &seg_name, + &segment_size); + if (verbose) + { + s = format (s, "%-40s%-20s%-20s%-10d%-10d", str, server_name, + seg_name, srv->api_client_index, srv->accept_cookie); + } + else + s = format (s, "%-40s%-20s", str, server_name); + return s; +} + +u8 * +format_application_client (u8 * s, va_list * args) +{ + application_t *client = va_arg (*args, application_t *); + int verbose = va_arg (*args, int); + stream_session_t *session; + u8 *str, *seg_name; + u32 segment_size; + + if (client == 0) + { + if (verbose) + s = + format (s, "%-40s%-20s%-10s", "Connection", "Segment", + "API Client"); + else + s = format (s, "%-40s", "Connection"); + + return s; + } + + session = stream_session_get (client->session_index, client->thread_index); + str = format (0, "%U", format_stream_session, session, verbose); + + session_manager_get_segment_info (session->server_segment_index, &seg_name, + &segment_size); + if (verbose) + { + s = format (s, "%-40s%-20s%-10d%", str, seg_name, + client->api_client_index); + } + else + s = format (s, "%-40s", str); + return s; +} + +static clib_error_t * +show_app_command_fn (vlib_main_t * vm, unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + application_t *app; + int do_server = 0; + int do_client = 0; + int verbose = 0; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "server")) + do_server = 1; + else if (unformat (input, "client")) + do_client = 1; + else if (unformat (input, "verbose")) + verbose = 1; + else + break; + } + + if (do_server) + { + if (pool_elts (app_pool)) + { + vlib_cli_output (vm, "%U", format_application_server, + 0 /* header */ , + verbose); + /* *INDENT-OFF* */ + pool_foreach (app, app_pool, + ({ + if (app->mode == APP_SERVER) + vlib_cli_output (vm, "%U", format_application_server, app, + verbose); + })); + /* *INDENT-ON* */ + } + else + vlib_cli_output (vm, "No active server bindings"); + } + + if (do_client) + { + if (pool_elts (app_pool)) + { + vlib_cli_output (vm, "%U", format_application_client, + 0 /* header */ , + verbose); + /* *INDENT-OFF* */ + pool_foreach (app, app_pool, + ({ + if (app->mode == APP_CLIENT) + vlib_cli_output (vm, "%U", format_application_client, app, + verbose); + })); + /* *INDENT-ON* */ + } + else + vlib_cli_output (vm, "No active server bindings"); + } + + return 0; +} + +VLIB_CLI_COMMAND (show_app_command, static) = +{ +.path = "show app",.short_help = + "show app [server|client] [verbose]",.function = show_app_command_fn,}; + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/session/application.h b/src/vnet/session/application.h new file mode 100644 index 00000000000..027d6967fd7 --- /dev/null +++ b/src/vnet/session/application.h @@ -0,0 +1,120 @@ +/* + * Copyright (c) 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. + */ + +#ifndef SRC_VNET_SESSION_APPLICATION_H_ +#define SRC_VNET_SESSION_APPLICATION_H_ + +#include +#include + +typedef enum +{ + APP_SERVER, + APP_CLIENT +} application_type_t; + +typedef struct _stream_session_cb_vft +{ + /** Notify server of new segment */ + int (*add_segment_callback) (u32 api_client_index, const u8 * seg_name, + u32 seg_size); + + /** Notify server of newly accepted session */ + int (*session_accept_callback) (stream_session_t * new_session); + + /* Connection request callback */ + int (*session_connected_callback) (u32 api_client_index, + stream_session_t * s, u8 code); + + /** Notify app that session is closing */ + void (*session_disconnect_callback) (stream_session_t * s); + + /** Notify app that session was reset */ + void (*session_reset_callback) (stream_session_t * s); + + /* Direct RX callback, for built-in servers */ + int (*builtin_server_rx_callback) (stream_session_t * session); + + /* Redirect connection to local server */ + int (*redirect_connect_callback) (u32 api_client_index, void *mp); +} session_cb_vft_t; + +typedef struct _application +{ + /** Index in server pool */ + u32 index; + + /** Flags */ + u32 flags; + + /** Binary API connection index, ~0 if internal */ + u32 api_client_index; + + /* */ + u32 api_context; + + /** Application listens for events on this svm queue */ + unix_shared_memory_queue_t *event_queue; + + /** Stream session type */ + u8 session_type; + + /* Stream server mode: accept or connect */ + u8 mode; + + u32 session_manager_index; + + /* + * Bind/Listen specific + */ + + /** Accept cookie, for multiple session flavors ($$$ maybe) */ + u32 accept_cookie; + + /** Index of the listen session or connect session */ + u32 session_index; + + /** Session thread index for client connect sessions */ + u32 thread_index; + + /* + * Callbacks: shoulder-taps for the server/client + */ + session_cb_vft_t cb_fns; +} application_t; + +application_t *application_new (application_type_t type, session_type_t sst, + u32 api_client_index, u32 flags, + session_cb_vft_t * cb_fns); +void application_del (application_t * app); +application_t *application_get (u32 index); +application_t *application_lookup (u32 api_client_index); +u32 application_get_index (application_t * app); + +int +application_server_init (application_t * server, u32 segment_size, + u32 add_segment_size, u32 rx_fifo_size, + u32 tx_fifo_size, u8 ** segment_name); +int application_api_queue_is_full (application_t * app); + +#endif /* SRC_VNET_SESSION_APPLICATION_H_ */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/session/application_interface.c b/src/vnet/session/application_interface.c new file mode 100644 index 00000000000..0ea77fd8c4e --- /dev/null +++ b/src/vnet/session/application_interface.c @@ -0,0 +1,459 @@ +/* + * Copyright (c) 2016 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 + +/** @file + VPP's application/session API bind/unbind/connect/disconnect calls +*/ + +static u8 +ip_is_zero (ip46_address_t * ip46_address, u8 is_ip4) +{ + if (is_ip4) + return (ip46_address->ip4.as_u32 == 0); + else + return (ip46_address->as_u64[0] == 0 && ip46_address->as_u64[1] == 0); +} + +static u8 +ip_is_local (ip46_address_t * ip46_address, u8 is_ip4) +{ + fib_node_index_t fei; + fib_entry_flag_t flags; + fib_prefix_t prefix; + + /* Check if requester is local */ + if (is_ip4) + { + prefix.fp_len = 32; + prefix.fp_proto = FIB_PROTOCOL_IP4; + } + else + { + prefix.fp_len = 128; + prefix.fp_proto = FIB_PROTOCOL_IP6; + } + + clib_memcpy (&prefix.fp_addr, ip46_address, sizeof (ip46_address)); + fei = fib_table_lookup (0, &prefix); + flags = fib_entry_get_flags (fei); + + return (flags & FIB_ENTRY_FLAG_LOCAL); +} + +int +api_parse_session_handle (u64 handle, u32 * session_index, u32 * thread_index) +{ + session_manager_main_t *smm = vnet_get_session_manager_main (); + stream_session_t *pool; + + *thread_index = handle & 0xFFFFFFFF; + *session_index = handle >> 32; + + if (*thread_index >= vec_len (smm->sessions)) + return VNET_API_ERROR_INVALID_VALUE; + + pool = smm->sessions[*thread_index]; + + if (pool_is_free_index (pool, *session_index)) + return VNET_API_ERROR_INVALID_VALUE_2; + + return 0; +} + +int +vnet_bind_i (u32 api_client_index, ip46_address_t * ip46, u16 port_host_order, + session_type_t sst, u64 * options, session_cb_vft_t * cb_fns, + application_t ** app, u32 * len_seg_name, char *seg_name) +{ + u8 *segment_name = 0; + application_t *server = 0; + stream_session_t *listener; + u8 is_ip4; + + listener = + stream_session_lookup_listener (ip46, + clib_host_to_net_u16 (port_host_order), + sst); + + if (listener) + return VNET_API_ERROR_ADDRESS_IN_USE; + + if (application_lookup (api_client_index)) + { + clib_warning ("Only one bind supported for now"); + return VNET_API_ERROR_ADDRESS_IN_USE; + } + + is_ip4 = SESSION_TYPE_IP4_UDP == sst || SESSION_TYPE_IP4_TCP == sst; + if (!ip_is_zero (ip46, is_ip4) && !ip_is_local (ip46, is_ip4)) + return VNET_API_ERROR_INVALID_VALUE; + + /* Allocate and initialize stream server */ + server = application_new (APP_SERVER, sst, api_client_index, + options[SESSION_OPTIONS_FLAGS], cb_fns); + + application_server_init (server, options[SESSION_OPTIONS_SEGMENT_SIZE], + options[SESSION_OPTIONS_ADD_SEGMENT_SIZE], + options[SESSION_OPTIONS_RX_FIFO_SIZE], + options[SESSION_OPTIONS_TX_FIFO_SIZE], + &segment_name); + + /* Setup listen path down to transport */ + stream_session_start_listen (server->index, ip46, port_host_order); + + /* + * Return values + */ + + ASSERT (vec_len (segment_name) <= 128); + *len_seg_name = vec_len (segment_name); + memcpy (seg_name, segment_name, *len_seg_name); + *app = server; + + return 0; +} + +int +vnet_unbind_i (u32 api_client_index) +{ + application_t *server; + + /* + * Find the stream_server_t corresponding to the api client + */ + server = application_lookup (api_client_index); + if (!server) + return VNET_API_ERROR_INVALID_VALUE_2; + + /* Clear the listener */ + stream_session_stop_listen (server->index); + application_del (server); + + return 0; +} + +int +vnet_connect_i (u32 api_client_index, u32 api_context, session_type_t sst, + ip46_address_t * ip46, u16 port, u64 * options, void *mp, + session_cb_vft_t * cb_fns) +{ + stream_session_t *listener; + application_t *server, *app; + + /* + * Figure out if connecting to a local server + */ + listener = stream_session_lookup_listener (ip46, + clib_host_to_net_u16 (port), + sst); + if (listener) + { + server = application_get (listener->app_index); + + /* + * Server is willing to have a direct fifo connection created + * instead of going through the state machine, etc. + */ + if (server->flags & SESSION_OPTIONS_FLAGS_USE_FIFO) + return server->cb_fns. + redirect_connect_callback (server->api_client_index, mp); + } + + /* Create client app */ + app = application_new (APP_CLIENT, sst, api_client_index, + options[SESSION_OPTIONS_FLAGS], cb_fns); + + app->api_context = api_context; + + /* + * Not connecting to a local server. Create regular session + */ + stream_session_open (sst, ip46, port, app->index); + + return 0; +} + +/** + * unformat a vnet URI + * + * fifo://name + * tcp://ip46-addr:port + * udp://ip46-addr:port + * + * u8 ip46_address[16]; + * u16 port_in_host_byte_order; + * stream_session_type_t sst; + * u8 *fifo_name; + * + * if (unformat (input, "%U", unformat_vnet_uri, &ip46_address, + * &sst, &port, &fifo_name)) + * etc... + * + */ +uword +unformat_vnet_uri (unformat_input_t * input, va_list * args) +{ + ip46_address_t *address = va_arg (*args, ip46_address_t *); + session_type_t *sst = va_arg (*args, session_type_t *); + u16 *port = va_arg (*args, u16 *); + + if (unformat (input, "tcp://%U/%d", unformat_ip4_address, &address->ip4, + port)) + { + *sst = SESSION_TYPE_IP4_TCP; + return 1; + } + if (unformat (input, "udp://%U/%d", unformat_ip4_address, &address->ip4, + port)) + { + *sst = SESSION_TYPE_IP4_UDP; + return 1; + } + if (unformat (input, "udp://%U/%d", unformat_ip6_address, &address->ip6, + port)) + { + *sst = SESSION_TYPE_IP6_UDP; + return 1; + } + if (unformat (input, "tcp://%U/%d", unformat_ip6_address, &address->ip6, + port)) + { + *sst = SESSION_TYPE_IP6_TCP; + return 1; + } + + return 0; +} + +int +parse_uri (char *uri, session_type_t * sst, ip46_address_t * addr, + u16 * port_number_host_byte_order) +{ + unformat_input_t _input, *input = &_input; + + /* Make sure */ + uri = (char *) format (0, "%s%c", uri, 0); + + /* Parse uri */ + unformat_init_string (input, uri, strlen (uri)); + if (!unformat (input, "%U", unformat_vnet_uri, addr, sst, + port_number_host_byte_order)) + { + unformat_free (input); + return VNET_API_ERROR_INVALID_VALUE; + } + unformat_free (input); + + return 0; +} + +int +vnet_bind_uri (vnet_bind_args_t * a) +{ + application_t *server = 0; + u16 port_host_order; + session_type_t sst = SESSION_N_TYPES; + ip46_address_t ip46; + int rv; + + memset (&ip46, 0, sizeof (ip46)); + rv = parse_uri (a->uri, &sst, &ip46, &port_host_order); + if (rv) + return rv; + + if ((rv = vnet_bind_i (a->api_client_index, &ip46, port_host_order, sst, + a->options, a->session_cb_vft, &server, + &a->segment_name_length, a->segment_name))) + return rv; + + a->server_event_queue_address = (u64) server->event_queue; + return 0; +} + +session_type_t +session_type_from_proto_and_ip (session_api_proto_t proto, u8 is_ip4) +{ + if (proto == SESSION_PROTO_TCP) + { + if (is_ip4) + return SESSION_TYPE_IP4_TCP; + else + return SESSION_TYPE_IP6_TCP; + } + else + { + if (is_ip4) + return SESSION_TYPE_IP4_UDP; + else + return SESSION_TYPE_IP6_UDP; + } + + return SESSION_N_TYPES; +} + +int +vnet_unbind_uri (char *uri, u32 api_client_index) +{ + u16 port_number_host_byte_order; + session_type_t sst = SESSION_N_TYPES; + ip46_address_t ip46_address; + stream_session_t *listener; + int rv; + + rv = parse_uri (uri, &sst, &ip46_address, &port_number_host_byte_order); + if (rv) + return rv; + + listener = + stream_session_lookup_listener (&ip46_address, + clib_host_to_net_u16 + (port_number_host_byte_order), sst); + + if (!listener) + return VNET_API_ERROR_ADDRESS_NOT_IN_USE; + + /* External client? */ + if (api_client_index != ~0) + { + ASSERT (vl_api_client_index_to_registration (api_client_index)); + } + + return vnet_unbind_i (api_client_index); +} + +int +vnet_connect_uri (vnet_connect_args_t * a) +{ + ip46_address_t ip46_address; + u16 port; + session_type_t sst; + application_t *app; + int rv; + + app = application_lookup (a->api_client_index); + if (app) + { + clib_warning ("Already have a connect from this app"); + return VNET_API_ERROR_INVALID_VALUE_2; + } + + /* Parse uri */ + rv = parse_uri (a->uri, &sst, &ip46_address, &port); + if (rv) + return rv; + + return vnet_connect_i (a->api_client_index, a->api_context, sst, + &ip46_address, port, a->options, a->mp, + a->session_cb_vft); +} + +int +vnet_disconnect_session (u32 client_index, u32 session_index, + u32 thread_index) +{ + stream_session_t *session; + + session = stream_session_get (session_index, thread_index); + stream_session_disconnect (session); + + return 0; +} + + +int +vnet_bind (vnet_bind_args_t * a) +{ + application_t *server = 0; + session_type_t sst = SESSION_N_TYPES; + int rv; + + sst = session_type_from_proto_and_ip (a->proto, a->tep.is_ip4); + if ((rv = vnet_bind_i (a->api_client_index, &a->tep.ip, a->tep.port, sst, + a->options, a->session_cb_vft, &server, + &a->segment_name_length, a->segment_name))) + return rv; + + a->server_event_queue_address = (u64) server->event_queue; + a->handle = (u64) a->tep.vrf << 32 | (u64) server->session_index; + return 0; +} + +int +vnet_unbind (vnet_unbind_args_t * a) +{ + application_t *server; + + if (a->api_client_index != ~0) + { + ASSERT (vl_api_client_index_to_registration (a->api_client_index)); + } + + /* Make sure this is the right one */ + server = application_lookup (a->api_client_index); + ASSERT (server->session_index == (0xFFFFFFFF & a->handle)); + + /* TODO use handle to disambiguate namespaces/vrfs */ + return vnet_unbind_i (a->api_client_index); +} + +int +vnet_connect (vnet_connect_args_t * a) +{ + session_type_t sst; + application_t *app; + + app = application_lookup (a->api_client_index); + if (app) + { + clib_warning ("Already have a connect from this app"); + return VNET_API_ERROR_INVALID_VALUE_2; + } + + sst = session_type_from_proto_and_ip (a->proto, a->tep.is_ip4); + return vnet_connect_i (a->api_client_index, a->api_context, sst, &a->tep.ip, + a->tep.port, a->options, a->mp, a->session_cb_vft); +} + +int +vnet_disconnect (vnet_disconnect_args_t * a) +{ + stream_session_t *session; + u32 session_index, thread_index; + + if (api_parse_session_handle (a->handle, &session_index, &thread_index)) + { + clib_warning ("Invalid handle"); + return -1; + } + + session = stream_session_get (session_index, thread_index); + stream_session_disconnect (session); + + return 0; +} + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/session/application_interface.h b/src/vnet/session/application_interface.h new file mode 100644 index 00000000000..8d87c067841 --- /dev/null +++ b/src/vnet/session/application_interface.h @@ -0,0 +1,136 @@ +/* + * Copyright (c) 2016 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 __included_uri_h__ +#define __included_uri_h__ + +#include +#include +#include +#include +#include +#include + +typedef enum _session_api_proto +{ + SESSION_PROTO_TCP, + SESSION_PROTO_UDP +} session_api_proto_t; + +typedef struct _vnet_bind_args_t +{ + union + { + char *uri; + struct + { + transport_endpoint_t tep; + session_api_proto_t proto; + }; + }; + + u32 api_client_index; + u64 *options; + session_cb_vft_t *session_cb_vft; + + /* + * Results + */ + char *segment_name; + u32 segment_name_length; + u64 server_event_queue_address; + u64 handle; +} vnet_bind_args_t; + +typedef struct _vnet_unbind_args_t +{ + union + { + char *uri; + u64 handle; + }; + u32 api_client_index; +} vnet_unbind_args_t; + +typedef struct _vnet_connect_args +{ + union + { + char *uri; + struct + { + transport_endpoint_t tep; + session_api_proto_t proto; + }; + }; + u32 api_client_index; + u32 api_context; + u64 *options; + session_cb_vft_t *session_cb_vft; + + /* Used for redirects */ + void *mp; +} vnet_connect_args_t; + +typedef struct _vnet_disconnect_args_t +{ + u64 handle; + u32 api_client_index; +} vnet_disconnect_args_t; + +/* Bind / connect options */ +typedef enum +{ + SESSION_OPTIONS_FLAGS, + SESSION_OPTIONS_SEGMENT_SIZE, + SESSION_OPTIONS_ADD_SEGMENT_SIZE, + SESSION_OPTIONS_RX_FIFO_SIZE, + SESSION_OPTIONS_TX_FIFO_SIZE, + SESSION_OPTIONS_ACCEPT_COOKIE, + SESSION_OPTIONS_N_OPTIONS +} session_options_index_t; + +/** Server can handle delegated connect requests from local clients */ +#define SESSION_OPTIONS_FLAGS_USE_FIFO (1<<0) + +/** Server wants vpp to add segments when out of memory for fifos */ +#define SESSION_OPTIONS_FLAGS_ADD_SEGMENT (1<<1) + +#define VNET_CONNECT_REDIRECTED 123 + +int vnet_bind_uri (vnet_bind_args_t *); +int vnet_unbind_uri (char *uri, u32 api_client_index); +int vnet_connect_uri (vnet_connect_args_t * a); +int +vnet_disconnect_session (u32 client_index, u32 session_index, + u32 thread_index); + +int vnet_bind (vnet_bind_args_t * a); +int vnet_connect (vnet_connect_args_t * a); +int vnet_unbind (vnet_unbind_args_t * a); +int vnet_disconnect (vnet_disconnect_args_t * a); + +int +api_parse_session_handle (u64 handle, u32 * session_index, + u32 * thread_index); + +#endif /* __included_uri_h__ */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/session/hashes.c b/src/vnet/session/hashes.c new file mode 100644 index 00000000000..1808dd73f90 --- /dev/null +++ b/src/vnet/session/hashes.c @@ -0,0 +1,28 @@ +/* + * Copyright (c) 2016 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. + */ + +/** Generate typed init functions for multiple hash table styles... */ + +#include +#include + +#include + +#undef __included_bihash_template_h__ + +#include +#include + +#include diff --git a/src/vnet/session/node.c b/src/vnet/session/node.c new file mode 100644 index 00000000000..e467f4e99e2 --- /dev/null +++ b/src/vnet/session/node.c @@ -0,0 +1,435 @@ +/* + * Copyright (c) 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 + +#include +#include +#include +#include + +#include +#include +#include + +vlib_node_registration_t session_queue_node; + +typedef struct +{ + u32 session_index; + u32 server_thread_index; +} session_queue_trace_t; + +/* packet trace format function */ +static u8 * +format_session_queue_trace (u8 * s, va_list * args) +{ + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); + session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *); + + s = format (s, "SESSION_QUEUE: session index %d, server thread index %d", + t->session_index, t->server_thread_index); + return s; +} + +vlib_node_registration_t session_queue_node; + +#define foreach_session_queue_error \ +_(TX, "Packets transmitted") \ +_(TIMER, "Timer events") + +typedef enum +{ +#define _(sym,str) SESSION_QUEUE_ERROR_##sym, + foreach_session_queue_error +#undef _ + SESSION_QUEUE_N_ERROR, +} session_queue_error_t; + +static char *session_queue_error_strings[] = { +#define _(sym,string) string, + foreach_session_queue_error +#undef _ +}; + +static u32 session_type_to_next[] = { + SESSION_QUEUE_NEXT_TCP_IP4_OUTPUT, + SESSION_QUEUE_NEXT_IP4_LOOKUP, + SESSION_QUEUE_NEXT_TCP_IP6_OUTPUT, + SESSION_QUEUE_NEXT_IP6_LOOKUP, +}; + +always_inline int +session_fifo_rx_i (vlib_main_t * vm, vlib_node_runtime_t * node, + session_manager_main_t * smm, session_fifo_event_t * e0, + stream_session_t * s0, u32 thread_index, int *n_tx_packets, + u8 peek_data) +{ + u32 n_trace = vlib_get_trace_count (vm, node); + u32 left_to_snd0, max_len_to_snd0, len_to_deq0, n_bufs, snd_space0; + u32 n_frame_bytes, n_frames_per_evt; + transport_connection_t *tc0; + transport_proto_vft_t *transport_vft; + u32 next_index, next0, *to_next, n_left_to_next, bi0; + vlib_buffer_t *b0; + u32 rx_offset; + u16 snd_mss0; + u8 *data0; + int i; + + next_index = next0 = session_type_to_next[s0->session_type]; + + transport_vft = session_get_transport_vft (s0->session_type); + tc0 = transport_vft->get_connection (s0->connection_index, thread_index); + + /* Make sure we have space to send and there's something to dequeue */ + snd_space0 = transport_vft->send_space (tc0); + snd_mss0 = transport_vft->send_mss (tc0); + + if (snd_space0 == 0 || svm_fifo_max_dequeue (s0->server_tx_fifo) == 0 + || snd_mss0 == 0) + return 0; + + ASSERT (e0->enqueue_length > 0); + + /* Ensure we're not writing more than transport window allows */ + max_len_to_snd0 = clib_min (e0->enqueue_length, snd_space0); + + if (peek_data) + { + /* Offset in rx fifo from where to peek data */ + rx_offset = transport_vft->rx_fifo_offset (tc0); + } + + /* TODO check if transport is willing to send len_to_snd0 + * bytes (Nagle) */ + + n_frame_bytes = snd_mss0 * VLIB_FRAME_SIZE; + n_frames_per_evt = ceil ((double) max_len_to_snd0 / n_frame_bytes); + + n_bufs = vec_len (smm->tx_buffers[thread_index]); + left_to_snd0 = max_len_to_snd0; + for (i = 0; i < n_frames_per_evt; i++) + { + /* Make sure we have at least one full frame of buffers ready */ + if (PREDICT_FALSE (n_bufs < VLIB_FRAME_SIZE)) + { + vec_validate (smm->tx_buffers[thread_index], + n_bufs + VLIB_FRAME_SIZE - 1); + n_bufs += + vlib_buffer_alloc (vm, &smm->tx_buffers[thread_index][n_bufs], + VLIB_FRAME_SIZE); + + /* buffer shortage + * XXX 0.9 because when debugging we might not get a full frame */ + if (PREDICT_FALSE (n_bufs < 0.9 * VLIB_FRAME_SIZE)) + { + /* Keep track of how much we've dequeued and exit */ + e0->enqueue_length -= max_len_to_snd0 - left_to_snd0; + return -1; + } + + _vec_len (smm->tx_buffers[thread_index]) = n_bufs; + } + + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + while (left_to_snd0 && n_left_to_next) + { + /* Get free buffer */ + n_bufs--; + bi0 = smm->tx_buffers[thread_index][n_bufs]; + _vec_len (smm->tx_buffers[thread_index]) = n_bufs; + + b0 = vlib_get_buffer (vm, bi0); + b0->error = 0; + b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID + | VNET_BUFFER_LOCALLY_ORIGINATED; + b0->current_data = 0; + + /* RX on the local interface. tx in default fib */ + vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + + /* usual speculation, or the enqueue_x1 macro will barf */ + to_next[0] = bi0; + to_next += 1; + n_left_to_next -= 1; + + VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0); + if (PREDICT_FALSE (n_trace > 0)) + { + session_queue_trace_t *t0; + vlib_trace_buffer (vm, node, next_index, b0, + 1 /* follow_chain */ ); + vlib_set_trace_count (vm, node, --n_trace); + t0 = vlib_add_trace (vm, node, b0, sizeof (*t0)); + t0->session_index = s0->session_index; + t0->server_thread_index = s0->thread_index; + } + + if (1) + { + ELOG_TYPE_DECLARE (e) = + { + .format = "evt-dequeue: id %d length %d",.format_args = + "i4i4",}; + struct + { + u32 data[2]; + } *ed; + ed = ELOG_DATA (&vm->elog_main, e); + ed->data[0] = e0->event_id; + ed->data[1] = e0->enqueue_length; + } + + len_to_deq0 = (left_to_snd0 < snd_mss0) ? left_to_snd0 : snd_mss0; + + /* Make room for headers */ + data0 = vlib_buffer_make_headroom (b0, MAX_HDRS_LEN); + + /* Dequeue the data + * TODO 1) peek instead of dequeue + * 2) buffer chains */ + if (peek_data) + { + int n_bytes_read; + n_bytes_read = svm_fifo_peek (s0->server_tx_fifo, s0->pid, + rx_offset, len_to_deq0, data0); + if (n_bytes_read < 0) + goto dequeue_fail; + + /* Keep track of progress locally, transport is also supposed to + * increment it independently when pushing header */ + rx_offset += n_bytes_read; + } + else + { + if (svm_fifo_dequeue_nowait (s0->server_tx_fifo, s0->pid, + len_to_deq0, data0) < 0) + goto dequeue_fail; + } + + b0->current_length = len_to_deq0; + + /* Ask transport to push header */ + transport_vft->push_header (tc0, b0); + + left_to_snd0 -= len_to_deq0; + *n_tx_packets = *n_tx_packets + 1; + + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, + to_next, n_left_to_next, + bi0, next0); + } + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + + /* If we couldn't dequeue all bytes store progress */ + if (max_len_to_snd0 < e0->enqueue_length) + { + e0->enqueue_length -= max_len_to_snd0; + vec_add1 (smm->evts_partially_read[thread_index], *e0); + } + return 0; + +dequeue_fail: + /* Can't read from fifo. Store event rx progress, save as partially read, + * return buff to free list and return */ + e0->enqueue_length -= max_len_to_snd0 - left_to_snd0; + vec_add1 (smm->evts_partially_read[thread_index], *e0); + + to_next -= 1; + n_left_to_next += 1; + _vec_len (smm->tx_buffers[thread_index]) += 1; + + clib_warning ("dequeue fail"); + return 0; +} + +int +session_fifo_rx_peek (vlib_main_t * vm, vlib_node_runtime_t * node, + session_manager_main_t * smm, session_fifo_event_t * e0, + stream_session_t * s0, u32 thread_index, int *n_tx_pkts) +{ + return session_fifo_rx_i (vm, node, smm, e0, s0, thread_index, n_tx_pkts, + 1); +} + +int +session_fifo_rx_dequeue (vlib_main_t * vm, vlib_node_runtime_t * node, + session_manager_main_t * smm, + session_fifo_event_t * e0, stream_session_t * s0, + u32 thread_index, int *n_tx_pkts) +{ + return session_fifo_rx_i (vm, node, smm, e0, s0, thread_index, n_tx_pkts, + 0); +} + +static uword +session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + session_manager_main_t *smm = vnet_get_session_manager_main (); + session_fifo_event_t *my_fifo_events, *e; + u32 n_to_dequeue; + unix_shared_memory_queue_t *q; + int n_tx_packets = 0; + u32 my_thread_index = vm->cpu_index; + int i, rv; + + /* + * Update TCP time + */ + tcp_update_time (vlib_time_now (vm), my_thread_index); + + /* + * Get vpp queue events + */ + q = smm->vpp_event_queues[my_thread_index]; + if (PREDICT_FALSE (q == 0)) + return 0; + + /* min number of events we can dequeue without blocking */ + n_to_dequeue = q->cursize; + if (n_to_dequeue == 0) + return 0; + + my_fifo_events = smm->fifo_events[my_thread_index]; + + /* If we didn't manage to process previous events try going + * over them again without dequeuing new ones. + * XXX: Block senders to sessions that can't keep up */ + if (vec_len (my_fifo_events) >= 100) + goto skip_dequeue; + + /* See you in the next life, don't be late */ + if (pthread_mutex_trylock (&q->mutex)) + return 0; + + for (i = 0; i < n_to_dequeue; i++) + { + vec_add2 (my_fifo_events, e, 1); + unix_shared_memory_queue_sub_raw (q, (u8 *) e); + } + + /* The other side of the connection is not polling */ + if (q->cursize < (q->maxsize / 8)) + (void) pthread_cond_broadcast (&q->condvar); + pthread_mutex_unlock (&q->mutex); + + smm->fifo_events[my_thread_index] = my_fifo_events; + +skip_dequeue: + + for (i = 0; i < n_to_dequeue; i++) + { + svm_fifo_t *f0; /* $$$ prefetch 1 ahead maybe */ + stream_session_t *s0; + u32 server_session_index0, server_thread_index0; + session_fifo_event_t *e0; + + e0 = &my_fifo_events[i]; + f0 = e0->fifo; + server_session_index0 = f0->server_session_index; + server_thread_index0 = f0->server_thread_index; + + /* $$$ add multiple event queues, per vpp worker thread */ + ASSERT (server_thread_index0 == my_thread_index); + + s0 = pool_elt_at_index (smm->sessions[my_thread_index], + server_session_index0); + + ASSERT (s0->thread_index == my_thread_index); + + switch (e0->event_type) + { + case FIFO_EVENT_SERVER_TX: + /* Spray packets in per session type frames, since they go to + * different nodes */ + rv = (smm->session_rx_fns[s0->session_type]) (vm, node, smm, e0, s0, + my_thread_index, + &n_tx_packets); + if (rv < 0) + goto done; + + break; + + default: + clib_warning ("unhandled event type %d", e0->event_type); + } + } + +done: + + /* Couldn't process all events. Probably out of buffers */ + if (PREDICT_FALSE (i < n_to_dequeue)) + { + session_fifo_event_t *partially_read = + smm->evts_partially_read[my_thread_index]; + vec_add (partially_read, &my_fifo_events[i], n_to_dequeue - i); + vec_free (my_fifo_events); + smm->fifo_events[my_thread_index] = partially_read; + smm->evts_partially_read[my_thread_index] = 0; + } + else + { + vec_free (smm->fifo_events[my_thread_index]); + smm->fifo_events[my_thread_index] = + smm->evts_partially_read[my_thread_index]; + smm->evts_partially_read[my_thread_index] = 0; + } + + vlib_node_increment_counter (vm, session_queue_node.index, + SESSION_QUEUE_ERROR_TX, n_tx_packets); + + return n_tx_packets; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (session_queue_node) = +{ + .function = session_queue_node_fn, + .name = "session-queue", + .format_trace = format_session_queue_trace, + .type = VLIB_NODE_TYPE_INPUT, + .n_errors = ARRAY_LEN (session_queue_error_strings), + .error_strings = session_queue_error_strings, + .n_next_nodes = SESSION_QUEUE_N_NEXT, + /* .state = VLIB_NODE_STATE_DISABLED, enable on-demand? */ + /* edit / add dispositions here */ + .next_nodes = + { + [SESSION_QUEUE_NEXT_DROP] = "error-drop", + [SESSION_QUEUE_NEXT_IP4_LOOKUP] = "ip4-lookup", + [SESSION_QUEUE_NEXT_IP6_LOOKUP] = "ip6-lookup", + [SESSION_QUEUE_NEXT_TCP_IP4_OUTPUT] = "tcp4-output", + [SESSION_QUEUE_NEXT_TCP_IP6_OUTPUT] = "tcp6-output", + }, +}; +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/session/session.api b/src/vnet/session/session.api new file mode 100644 index 00000000000..a7b28c1dba0 --- /dev/null +++ b/src/vnet/session/session.api @@ -0,0 +1,429 @@ +/* + * Copyright (c) 2015-2016 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. + */ + + /** \brief Bind to a given URI + @param client_index - opaque cookie to identify the sender + @param context - sender context, to match reply w/ request + @param accept_cookie - sender accept cookie, to identify this bind flavor + @param uri - a URI, e.g. "tcp://0.0.0.0/0/80" [ipv4] + "tcp://::/0/80" [ipv6] etc. + @param options - socket options, fifo sizes, etc. +*/ +define bind_uri { + u32 client_index; + u32 context; + u32 accept_cookie; + u32 initial_segment_size; + u8 uri[128]; + u64 options[16]; +}; + +/** \brief Unbind a given URI + @param client_index - opaque cookie to identify the sender + @param context - sender context, to match reply w/ request + @param uri - a URI, e.g. "tcp://0.0.0.0/0/80" [ipv4] + "tcp://::/0/80" [ipv6], etc. + @param options - socket options, fifo sizes, etc. +*/ +define unbind_uri { + u32 client_index; + u32 context; + u8 uri[128]; +}; + +/** \brief Connect to a given URI + @param client_index - opaque cookie to identify the sender + @param context - sender context, to match reply w/ request + @param accept_cookie - sender accept cookie, to identify this bind flavor + @param uri - a URI, e.g. "tcp4://0.0.0.0/0/80" + "tcp6://::/0/80" [ipv6], etc. + @param options - socket options, fifo sizes, etc. +*/ +define connect_uri { + u32 client_index; + u32 context; + u8 uri[128]; + u64 client_queue_address; + u64 options[16]; +}; + +/** \brief Bind reply + @param context - sender context, to match reply w/ request + @param retval - return code for the request + @param event_queue_address - vpp event queue address or 0 if this + connection shouldn't send events + @param segment_name_length - length of segment name + @param segment_name - name of segment client needs to attach to +*/ +define bind_uri_reply { + u32 context; + i32 retval; + u64 server_event_queue_address; + u8 segment_name_length; + u32 segment_size; + u8 segment_name[128]; +}; + +/** \brief unbind reply + @param context - sender context, to match reply w/ request + @param retval - return code for the request +*/ +define unbind_uri_reply { + u32 context; + i32 retval; +}; + +/** \brief vpp->client, connect reply + @param context - sender context, to match reply w/ request + @param retval - return code for the request + @param server_rx_fifo - rx (vpp -> vpp-client) fifo address + @param server_tx_fifo - tx (vpp-client -> vpp) fifo address + @param session_index - session index; + @param session_thread_index - session thread index + @param session_type - session thread type + @param vpp_event_queue_address - vpp's event queue address + @param client_event_queue_address - client's event queue address + @param segment_name_length - non-zero if the client needs to attach to + the fifo segment + @param segment_name - set if the client needs to attach to the segment +*/ +define connect_uri_reply { + u32 context; + i32 retval; + u64 server_rx_fifo; + u64 server_tx_fifo; + u32 session_index; + u32 session_thread_index; + u8 session_type; + u64 client_event_queue_address; + u64 vpp_event_queue_address; + u32 segment_size; + u8 segment_name_length; + u8 segment_name[128]; +}; + +/** \brief vpp->client, please map an additional shared memory segment + @param context - sender context, to match reply w/ request + @param segment_name - +*/ +define map_another_segment { + u32 client_index; + u32 context; + u32 segment_size; + u8 segment_name[128]; +}; + +/** \brief client->vpp + @param context - sender context, to match reply w/ request + @param retval - return code for the request +*/ +define map_another_segment_reply { + u32 context; + i32 retval; +}; + +/** \brief vpp->client, accept this session + @param context - sender context, to match reply w/ request + @param accept_cookie - tells client which bind flavor just occurred + @param rx_fifo_address - rx (vpp -> vpp-client) fifo address + @param tx_fifo_address - tx (vpp-client -> vpp) fifo address + @param session_index - index of new session + @param session_thread_index - thread index of new session + @param vpp_event_queue_address - vpp's event queue address + @param session_type - type of session + +*/ +define accept_session { + u32 client_index; + u32 context; + u32 accept_cookie; + u64 server_rx_fifo; + u64 server_tx_fifo; + u32 session_index; + u32 session_thread_index; + u64 vpp_event_queue_address; + u8 session_type; +}; + +/** \brief client->vpp, reply to an accept message + @param context - sender context, to match reply w/ request + @param retval - return code for the request + @param session_index - session index from accept_session / connect_reply + @param session_thread_index - thread index from accept_session / + connect_reply +*/ +define accept_session_reply { + u32 context; + i32 retval; + u8 session_type; + u8 session_thread_index; + u32 session_index; +}; + +/** \brief bidirectional disconnect API + @param client_index - opaque cookie to identify the sender + client to vpp direction only + @param context - sender context, to match reply w/ request + @param session_index - cookie #1 from accept_session / connect_reply + @param session_thread_index - cookie #2 +*/ +define disconnect_session { + u32 client_index; + u32 context; + u32 session_index; + u32 session_thread_index; +}; + +/** \brief bidirectional disconnect reply API + @param client_index - opaque cookie to identify the sender + client to vpp direction only + @param context - sender context, to match reply w/ request + @param retval - return code for the request + @param session_index - session index from accept_session / connect_reply + @param session_thread_index - thread index from accept_session / + connect_reply +*/ +define disconnect_session_reply { + u32 client_index; + u32 context; + i32 retval; + u32 session_index; + u32 session_thread_index; +}; + +/** \brief vpp->client reset session API + @param client_index - opaque cookie to identify the sender + client to vpp direction only + @param context - sender context, to match reply w/ request + @param session_index - session index from accept_session / connect_reply + @param session_thread_index - thread index from accept_session / + connect_reply +*/ +define reset_session { + u32 client_index; + u32 context; + u32 session_index; + u32 session_thread_index; +}; + +/** \brief client->vpp reset session reply + @param client_index - opaque cookie to identify the sender + client to vpp direction only + @param context - sender context, to match reply w/ request + @param retval - return code for the request + @param session_index - session index from accept_session / connect_reply + @param session_thread_index - thread index from accept_session / + connect_reply +*/ +define reset_session_reply { + u32 client_index; + u32 context; + i32 retval; + u32 session_index; + u32 session_thread_index; +}; + +/** \brief Bind to an ip:port pair for a given transport protocol + @param client_index - opaque cookie to identify the sender + @param context - sender context, to match reply w/ request + @param vrf - bind namespace + @param is_ip4 - flag that is 1 if ip address family is IPv4 + @param ip - ip address + @param port - port + @param proto - protocol 0 - TCP 1 - UDP + @param options - socket options, fifo sizes, etc. +*/ +define bind_sock { + u32 client_index; + u32 context; + u32 vrf; + u8 is_ip4; + u8 ip[16]; + u16 port; + u8 proto; + u64 options[16]; +}; + +/** \brief Unbind + @param client_index - opaque cookie to identify the sender + @param context - sender context, to match reply w/ request + @param handle - bind handle obtained from bind reply +*/ +define unbind_sock { + u32 client_index; + u32 context; + u64 handle; +}; + +/** \brief Connect to a remote peer + @param client_index - opaque cookie to identify the sender + @param context - sender context, to match reply w/ request + @param vrf - connection namespace + @param is_ip4 - flag that is 1 if ip address family is IPv4 + @param ip - ip address + @param port - port + @param proto - protocol 0 - TCP 1 - UDP + @param client_queue_address - client's API queue address. Non-zero when + used to perform redirects + @param options - socket options, fifo sizes, etc. +*/ +define connect_sock { + u32 client_index; + u32 context; + u32 vrf; + u8 is_ip4; + u8 ip[16]; + u16 port; + u8 proto; + u64 client_queue_address; + u64 options[16]; +}; + +/** \brief Bind reply + @param context - sender context, to match reply w/ request + @param handle - bind handle + @param retval - return code for the request + @param event_queue_address - vpp event queue address or 0 if this + connection shouldn't send events + @param segment_name_length - length of segment name + @param segment_name - name of segment client needs to attach to +*/ +define bind_sock_reply { + u32 context; + u64 handle; + i32 retval; + u64 server_event_queue_address; + u32 segment_size; + u8 segment_name_length; + u8 segment_name[128]; +}; + +/** \brief unbind reply + @param context - sender context, to match reply w/ request + @param retval - return code for the request +*/ +define unbind_sock_reply { + u32 context; + i32 retval; +}; + +/** \brief vpp/server->client, connect reply + @param context - sender context, to match reply w/ request + @param retval - return code for the request + @param handle - connection handle + @param server_rx_fifo - rx (vpp -> vpp-client) fifo address + @param server_tx_fifo - tx (vpp-client -> vpp) fifo address + @param vpp_event_queue_address - vpp's event queue address + @param client_event_queue_address - client's event queue address + @param segment_name_length - non-zero if the client needs to attach to + the fifo segment + @param segment_name - set if the client needs to attach to the segment +*/ +define connect_sock_reply { + u32 context; + i32 retval; + u64 handle; + u64 server_rx_fifo; + u64 server_tx_fifo; + u64 client_event_queue_address; + u64 vpp_event_queue_address; + u32 segment_size; + u8 segment_name_length; + u8 segment_name[128]; +}; + +/** \brief bidirectional disconnect API + @param client_index - opaque cookie to identify the sender + client to vpp direction only + @param context - sender context, to match reply w/ request + @param handle - session handle obtained through accept/connect +*/ +define disconnect_sock { + u32 client_index; + u32 context; + u64 handle; +}; + +/** \brief bidirectional disconnect reply API + @param client_index - opaque cookie to identify the sender + client to vpp direction only + @param client_context - sender context, to match reply w/ request + @param handle - session handle obtained through accept/connect +*/ +define disconnect_sock_reply { + u32 client_index; + u32 context; + i32 retval; + u64 handle; +}; + +/** \brief vpp->client, accept this session + @param context - sender context, to match reply w/ request + @param accept_cookie - tells client which bind flavor just occurred + @param handle - session handle obtained through accept/connect + @param rx_fifo_address - rx (vpp -> vpp-client) fifo address + @param tx_fifo_address - tx (vpp-client -> vpp) fifo address + @param vpp_event_queue_address - vpp's event queue address +*/ +define accept_sock { + u32 client_index; + u32 context; + u32 accept_cookie; + u64 handle; + u64 server_rx_fifo; + u64 server_tx_fifo; + u64 vpp_event_queue_address; +}; + +/** \brief client->vpp, reply to an accept message + @param context - sender context, to match reply w/ request + @param retval - return code for the request + @param handle - session handle obtained through accept/connect +*/ +define accept_sock_reply { + u32 context; + i32 retval; + u64 handle; +}; + +/** \brief vpp->client reset session API + @param client_index - opaque cookie to identify the sender + client to vpp direction only + @param context - sender context, to match reply w/ request + @param handle - session handle obtained through accept/connect +*/ +define reset_sock { + u32 client_index; + u32 context; + u64 handle; +}; + +/** \brief client->vpp reset session reply + @param client_index - opaque cookie to identify the sender + client to vpp direction only + @param context - sender context, to match reply w/ request + @param handle - session handle obtained through accept/connect +*/ +define reset_sock_reply { + u32 client_index; + u32 context; + i32 retval; + u64 handle; +}; +/* + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ \ No newline at end of file diff --git a/src/vnet/session/session.c b/src/vnet/session/session.c new file mode 100644 index 00000000000..539da613367 --- /dev/null +++ b/src/vnet/session/session.c @@ -0,0 +1,1286 @@ +/* + * Copyright (c) 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. + */ +/** + * @file + * @brief Session and session manager + */ + +#include +#include +#include +#include +#include + +/** + * Per-type vector of transport protocol virtual function tables + */ +static transport_proto_vft_t *tp_vfts; + +session_manager_main_t session_manager_main; + +/* + * Session lookup key; (src-ip, dst-ip, src-port, dst-port, session-type) + * Value: (owner thread index << 32 | session_index); + */ +static void +stream_session_table_add_for_tc (u8 sst, transport_connection_t * tc, + u64 value) +{ + session_manager_main_t *smm = &session_manager_main; + session_kv4_t kv4; + session_kv6_t kv6; + + switch (sst) + { + case SESSION_TYPE_IP4_UDP: + case SESSION_TYPE_IP4_TCP: + make_v4_ss_kv_from_tc (&kv4, tc); + kv4.value = value; + clib_bihash_add_del_16_8 (&smm->v4_session_hash, &kv4, 1 /* is_add */ ); + break; + case SESSION_TYPE_IP6_UDP: + case SESSION_TYPE_IP6_TCP: + make_v6_ss_kv_from_tc (&kv6, tc); + kv6.value = value; + clib_bihash_add_del_48_8 (&smm->v6_session_hash, &kv6, 1 /* is_add */ ); + break; + default: + clib_warning ("Session type not supported"); + ASSERT (0); + } +} + +void +stream_session_table_add (session_manager_main_t * smm, stream_session_t * s, + u64 value) +{ + transport_connection_t *tc; + + tc = tp_vfts[s->session_type].get_connection (s->connection_index, + s->thread_index); + stream_session_table_add_for_tc (s->session_type, tc, value); +} + +static void +stream_session_half_open_table_add (u8 sst, transport_connection_t * tc, + u64 value) +{ + session_manager_main_t *smm = &session_manager_main; + session_kv4_t kv4; + session_kv6_t kv6; + + switch (sst) + { + case SESSION_TYPE_IP4_UDP: + case SESSION_TYPE_IP4_TCP: + make_v4_ss_kv_from_tc (&kv4, tc); + kv4.value = value; + clib_bihash_add_del_16_8 (&smm->v4_half_open_hash, &kv4, + 1 /* is_add */ ); + break; + case SESSION_TYPE_IP6_UDP: + case SESSION_TYPE_IP6_TCP: + make_v6_ss_kv_from_tc (&kv6, tc); + kv6.value = value; + clib_bihash_add_del_48_8 (&smm->v6_half_open_hash, &kv6, + 1 /* is_add */ ); + break; + default: + clib_warning ("Session type not supported"); + ASSERT (0); + } +} + +static int +stream_session_table_del_for_tc (session_manager_main_t * smm, u8 sst, + transport_connection_t * tc) +{ + session_kv4_t kv4; + session_kv6_t kv6; + + switch (sst) + { + case SESSION_TYPE_IP4_UDP: + case SESSION_TYPE_IP4_TCP: + make_v4_ss_kv_from_tc (&kv4, tc); + return clib_bihash_add_del_16_8 (&smm->v4_session_hash, &kv4, + 0 /* is_add */ ); + break; + case SESSION_TYPE_IP6_UDP: + case SESSION_TYPE_IP6_TCP: + make_v6_ss_kv_from_tc (&kv6, tc); + return clib_bihash_add_del_48_8 (&smm->v6_session_hash, &kv6, + 0 /* is_add */ ); + break; + default: + clib_warning ("Session type not supported"); + ASSERT (0); + } + + return 0; +} + +static int +stream_session_table_del (session_manager_main_t * smm, stream_session_t * s) +{ + transport_connection_t *ts; + + ts = tp_vfts[s->session_type].get_connection (s->connection_index, + s->thread_index); + return stream_session_table_del_for_tc (smm, s->session_type, ts); +} + +static void +stream_session_half_open_table_del (session_manager_main_t * smm, u8 sst, + transport_connection_t * tc) +{ + session_kv4_t kv4; + session_kv6_t kv6; + + switch (sst) + { + case SESSION_TYPE_IP4_UDP: + case SESSION_TYPE_IP4_TCP: + make_v4_ss_kv_from_tc (&kv4, tc); + clib_bihash_add_del_16_8 (&smm->v4_half_open_hash, &kv4, + 0 /* is_add */ ); + break; + case SESSION_TYPE_IP6_UDP: + case SESSION_TYPE_IP6_TCP: + make_v6_ss_kv_from_tc (&kv6, tc); + clib_bihash_add_del_48_8 (&smm->v6_half_open_hash, &kv6, + 0 /* is_add */ ); + break; + default: + clib_warning ("Session type not supported"); + ASSERT (0); + } +} + +stream_session_t * +stream_session_lookup_listener4 (ip4_address_t * lcl, u16 lcl_port, u8 proto) +{ + session_manager_main_t *smm = &session_manager_main; + session_kv4_t kv4; + int rv; + + make_v4_listener_kv (&kv4, lcl, lcl_port, proto); + rv = clib_bihash_search_inline_16_8 (&smm->v4_session_hash, &kv4); + if (rv == 0) + return pool_elt_at_index (smm->listen_sessions[proto], (u32) kv4.value); + + /* Zero out the lcl ip */ + kv4.key[0] = 0; + rv = clib_bihash_search_inline_16_8 (&smm->v4_session_hash, &kv4); + if (rv == 0) + return pool_elt_at_index (smm->listen_sessions[proto], kv4.value); + + return 0; +} + +/** Looks up a session based on the 5-tuple passed as argument. + * + * First it tries to find an established session, if this fails, it tries + * finding a listener session if this fails, it tries a lookup with a + * wildcarded local source (listener bound to all interfaces) + */ +stream_session_t * +stream_session_lookup4 (ip4_address_t * lcl, ip4_address_t * rmt, + u16 lcl_port, u16 rmt_port, u8 proto, + u32 my_thread_index) +{ + session_manager_main_t *smm = &session_manager_main; + session_kv4_t kv4; + int rv; + + /* Lookup session amongst established ones */ + make_v4_ss_kv (&kv4, lcl, rmt, lcl_port, rmt_port, proto); + rv = clib_bihash_search_inline_16_8 (&smm->v4_session_hash, &kv4); + if (rv == 0) + return stream_session_get_tsi (kv4.value, my_thread_index); + + /* If nothing is found, check if any listener is available */ + return stream_session_lookup_listener4 (lcl, lcl_port, proto); +} + +stream_session_t * +stream_session_lookup_listener6 (ip6_address_t * lcl, u16 lcl_port, u8 proto) +{ + session_manager_main_t *smm = &session_manager_main; + session_kv6_t kv6; + int rv; + + make_v6_listener_kv (&kv6, lcl, lcl_port, proto); + rv = clib_bihash_search_inline_48_8 (&smm->v6_session_hash, &kv6); + if (rv == 0) + return pool_elt_at_index (smm->listen_sessions[proto], kv6.value); + + /* Zero out the lcl ip */ + kv6.key[0] = kv6.key[1] = 0; + rv = clib_bihash_search_inline_48_8 (&smm->v6_session_hash, &kv6); + if (rv == 0) + return pool_elt_at_index (smm->listen_sessions[proto], kv6.value); + + return 0; +} + +/* Looks up a session based on the 5-tuple passed as argument. + * First it tries to find an established session, if this fails, it tries + * finding a listener session if this fails, it tries a lookup with a + * wildcarded local source (listener bound to all interfaces) */ +stream_session_t * +stream_session_lookup6 (ip6_address_t * lcl, ip6_address_t * rmt, + u16 lcl_port, u16 rmt_port, u8 proto, + u32 my_thread_index) +{ + session_manager_main_t *smm = vnet_get_session_manager_main (); + session_kv6_t kv6; + int rv; + + make_v6_ss_kv (&kv6, lcl, rmt, lcl_port, rmt_port, proto); + rv = clib_bihash_search_inline_48_8 (&smm->v6_session_hash, &kv6); + if (rv == 0) + return stream_session_get_tsi (kv6.value, my_thread_index); + + /* If nothing is found, check if any listener is available */ + return stream_session_lookup_listener6 (lcl, lcl_port, proto); +} + +stream_session_t * +stream_session_lookup_listener (ip46_address_t * lcl, u16 lcl_port, u8 proto) +{ + switch (proto) + { + case SESSION_TYPE_IP4_UDP: + case SESSION_TYPE_IP4_TCP: + return stream_session_lookup_listener4 (&lcl->ip4, lcl_port, proto); + break; + case SESSION_TYPE_IP6_UDP: + case SESSION_TYPE_IP6_TCP: + return stream_session_lookup_listener6 (&lcl->ip6, lcl_port, proto); + break; + } + return 0; +} + +static u64 +stream_session_half_open_lookup (session_manager_main_t * smm, + ip46_address_t * lcl, ip46_address_t * rmt, + u16 lcl_port, u16 rmt_port, u8 proto) +{ + session_kv4_t kv4; + session_kv6_t kv6; + int rv; + + switch (proto) + { + case SESSION_TYPE_IP4_UDP: + case SESSION_TYPE_IP4_TCP: + make_v4_ss_kv (&kv4, &lcl->ip4, &rmt->ip4, lcl_port, rmt_port, proto); + rv = clib_bihash_search_inline_16_8 (&smm->v4_half_open_hash, &kv4); + + if (rv == 0) + return kv4.value; + + return (u64) ~ 0; + break; + case SESSION_TYPE_IP6_UDP: + case SESSION_TYPE_IP6_TCP: + make_v6_ss_kv (&kv6, &lcl->ip6, &rmt->ip6, lcl_port, rmt_port, proto); + rv = clib_bihash_search_inline_48_8 (&smm->v6_half_open_hash, &kv6); + + if (rv == 0) + return kv6.value; + + return (u64) ~ 0; + break; + } + return 0; +} + +transport_connection_t * +stream_session_lookup_transport4 (session_manager_main_t * smm, + ip4_address_t * lcl, ip4_address_t * rmt, + u16 lcl_port, u16 rmt_port, u8 proto, + u32 my_thread_index) +{ + session_kv4_t kv4; + stream_session_t *s; + int rv; + + /* Lookup session amongst established ones */ + make_v4_ss_kv (&kv4, lcl, rmt, lcl_port, rmt_port, proto); + rv = clib_bihash_search_inline_16_8 (&smm->v4_session_hash, &kv4); + if (rv == 0) + { + s = stream_session_get_tsi (kv4.value, my_thread_index); + + return tp_vfts[s->session_type].get_connection (s->connection_index, + my_thread_index); + } + + /* If nothing is found, check if any listener is available */ + s = stream_session_lookup_listener4 (lcl, lcl_port, proto); + if (s) + return tp_vfts[s->session_type].get_listener (s->connection_index); + + /* Finally, try half-open connections */ + rv = clib_bihash_search_inline_16_8 (&smm->v4_half_open_hash, &kv4); + if (rv == 0) + return tp_vfts[proto].get_half_open (kv4.value & 0xFFFFFFFF); + + return 0; +} + +transport_connection_t * +stream_session_lookup_transport6 (session_manager_main_t * smm, + ip6_address_t * lcl, ip6_address_t * rmt, + u16 lcl_port, u16 rmt_port, u8 proto, + u32 my_thread_index) +{ + stream_session_t *s; + session_kv6_t kv6; + int rv; + + make_v6_ss_kv (&kv6, lcl, rmt, lcl_port, rmt_port, proto); + rv = clib_bihash_search_inline_48_8 (&smm->v6_session_hash, &kv6); + if (rv == 0) + { + s = stream_session_get_tsi (kv6.value, my_thread_index); + + return tp_vfts[s->session_type].get_connection (s->connection_index, + my_thread_index); + } + + /* If nothing is found, check if any listener is available */ + s = stream_session_lookup_listener6 (lcl, lcl_port, proto); + if (s) + return tp_vfts[s->session_type].get_listener (s->connection_index); + + /* Finally, try half-open connections */ + rv = clib_bihash_search_inline_48_8 (&smm->v6_half_open_hash, &kv6); + if (rv == 0) + return tp_vfts[s->session_type].get_half_open (kv6.value & 0xFFFFFFFF); + + return 0; +} + +/** + * Allocate vpp event queue (once) per worker thread + */ +void +vpp_session_event_queue_allocate (session_manager_main_t * smm, + u32 thread_index) +{ + api_main_t *am = &api_main; + void *oldheap; + + if (smm->vpp_event_queues[thread_index] == 0) + { + /* Allocate event fifo in the /vpe-api shared-memory segment */ + oldheap = svm_push_data_heap (am->vlib_rp); + + smm->vpp_event_queues[thread_index] = + unix_shared_memory_queue_init (2048 /* nels $$$$ config */ , + sizeof (session_fifo_event_t), + 0 /* consumer pid */ , + 0 + /* (do not) send signal when queue non-empty */ + ); + + svm_pop_heap (oldheap); + } +} + +void +session_manager_get_segment_info (u32 index, u8 ** name, u32 * size) +{ + svm_fifo_segment_private_t *s; + s = svm_fifo_get_segment (index); + *name = s->h->segment_name; + *size = s->ssvm.ssvm_size; +} + +always_inline int +session_manager_add_segment_i (session_manager_main_t * smm, + session_manager_t * sm, + u32 segment_size, u8 * segment_name) +{ + svm_fifo_segment_create_args_t _ca, *ca = &_ca; + int rv; + + memset (ca, 0, sizeof (*ca)); + + ca->segment_name = (char *) segment_name; + ca->segment_size = segment_size; + + rv = svm_fifo_segment_create (ca); + if (rv) + { + clib_warning ("svm_fifo_segment_create ('%s', %d) failed", + ca->segment_name, ca->segment_size); + vec_free (segment_name); + return -1; + } + + vec_add1 (sm->segment_indices, ca->new_segment_index); + + return 0; +} + +static int +session_manager_add_segment (session_manager_main_t * smm, + session_manager_t * sm) +{ + u8 *segment_name; + svm_fifo_segment_create_args_t _ca, *ca = &_ca; + u32 add_segment_size; + u32 default_segment_size = 128 << 10; + + memset (ca, 0, sizeof (*ca)); + segment_name = format (0, "%d-%d%c", getpid (), + smm->unique_segment_name_counter++, 0); + add_segment_size = + sm->add_segment_size ? sm->add_segment_size : default_segment_size; + + return session_manager_add_segment_i (smm, sm, add_segment_size, + segment_name); +} + +int +session_manager_add_first_segment (session_manager_main_t * smm, + session_manager_t * sm, u32 segment_size, + u8 ** segment_name) +{ + svm_fifo_segment_create_args_t _ca, *ca = &_ca; + memset (ca, 0, sizeof (*ca)); + *segment_name = format (0, "%d-%d%c", getpid (), + smm->unique_segment_name_counter++, 0); + return session_manager_add_segment_i (smm, sm, segment_size, *segment_name); +} + +void +session_manager_del (session_manager_main_t * smm, session_manager_t * sm) +{ + u32 *deleted_sessions = 0; + u32 *deleted_thread_indices = 0; + int i, j; + + /* Across all fifo segments used by the server */ + for (j = 0; j < vec_len (sm->segment_indices); j++) + { + svm_fifo_segment_private_t *fifo_segment; + svm_fifo_t **fifos; + /* Vector of fifos allocated in the segment */ + fifo_segment = svm_fifo_get_segment (sm->segment_indices[j]); + fifos = (svm_fifo_t **) fifo_segment->h->fifos; + + /* + * Remove any residual sessions from the session lookup table + * Don't bother deleting the individual fifos, we're going to + * throw away the fifo segment in a minute. + */ + for (i = 0; i < vec_len (fifos); i++) + { + svm_fifo_t *fifo; + u32 session_index, thread_index; + stream_session_t *session; + + fifo = fifos[i]; + session_index = fifo->server_session_index; + thread_index = fifo->server_thread_index; + + session = pool_elt_at_index (smm->sessions[thread_index], + session_index); + + /* Add to the deleted_sessions vector (once!) */ + if (!session->is_deleted) + { + session->is_deleted = 1; + vec_add1 (deleted_sessions, + session - smm->sessions[thread_index]); + vec_add1 (deleted_thread_indices, thread_index); + } + } + + for (i = 0; i < vec_len (deleted_sessions); i++) + { + stream_session_t *session; + + session = + pool_elt_at_index (smm->sessions[deleted_thread_indices[i]], + deleted_sessions[i]); + + /* Instead of directly removing the session call disconnect */ + stream_session_disconnect (session); + + /* + stream_session_table_del (smm, session); + pool_put(smm->sessions[deleted_thread_indices[i]], session); + */ + } + + vec_reset_length (deleted_sessions); + vec_reset_length (deleted_thread_indices); + + /* Instead of removing the segment, test when removing the session if + * the segment can be removed + */ + /* svm_fifo_segment_delete (fifo_segment); */ + } + + vec_free (deleted_sessions); + vec_free (deleted_thread_indices); +} + +int +session_manager_allocate_session_fifos (session_manager_main_t * smm, + session_manager_t * sm, + svm_fifo_t ** server_rx_fifo, + svm_fifo_t ** server_tx_fifo, + u32 * fifo_segment_index, + u8 * added_a_segment) +{ + svm_fifo_segment_private_t *fifo_segment; + u32 fifo_size, default_fifo_size = 8192 /* TODO config */ ; + int i; + + *added_a_segment = 0; + + /* Allocate svm fifos */ + ASSERT (vec_len (sm->segment_indices)); + +again: + for (i = 0; i < vec_len (sm->segment_indices); i++) + { + *fifo_segment_index = sm->segment_indices[i]; + fifo_segment = svm_fifo_get_segment (*fifo_segment_index); + + fifo_size = sm->rx_fifo_size; + fifo_size = (fifo_size == 0) ? default_fifo_size : fifo_size; + *server_rx_fifo = svm_fifo_segment_alloc_fifo (fifo_segment, fifo_size); + + fifo_size = sm->tx_fifo_size; + fifo_size = (fifo_size == 0) ? default_fifo_size : fifo_size; + *server_tx_fifo = svm_fifo_segment_alloc_fifo (fifo_segment, fifo_size); + + if (*server_rx_fifo == 0) + { + /* This would be very odd, but handle it... */ + if (*server_tx_fifo != 0) + { + svm_fifo_segment_free_fifo (fifo_segment, *server_tx_fifo); + *server_tx_fifo = 0; + } + continue; + } + if (*server_tx_fifo == 0) + { + if (*server_rx_fifo != 0) + { + svm_fifo_segment_free_fifo (fifo_segment, *server_rx_fifo); + *server_rx_fifo = 0; + } + continue; + } + break; + } + + /* See if we're supposed to create another segment */ + if (*server_rx_fifo == 0) + { + if (sm->add_segment) + { + if (*added_a_segment) + { + clib_warning ("added a segment, still cant allocate a fifo"); + return SESSION_ERROR_NEW_SEG_NO_SPACE; + } + + if (session_manager_add_segment (smm, sm)) + return VNET_API_ERROR_URI_FIFO_CREATE_FAILED; + + *added_a_segment = 1; + goto again; + } + else + return SESSION_ERROR_NO_SPACE; + } + return 0; +} + +int +stream_session_create_i (session_manager_main_t * smm, application_t * app, + transport_connection_t * tc, + stream_session_t ** ret_s) +{ + int rv; + svm_fifo_t *server_rx_fifo = 0, *server_tx_fifo = 0; + u32 fifo_segment_index; + u32 pool_index, seg_size; + stream_session_t *s; + u64 value; + u32 thread_index = tc->thread_index; + session_manager_t *sm; + u8 segment_added; + u8 *seg_name; + + sm = session_manager_get (app->session_manager_index); + + /* Check the API queue */ + if (app->mode == APP_SERVER && application_api_queue_is_full (app)) + return SESSION_ERROR_API_QUEUE_FULL; + + if ((rv = session_manager_allocate_session_fifos (smm, sm, &server_rx_fifo, + &server_tx_fifo, + &fifo_segment_index, + &segment_added))) + return rv; + + if (segment_added && app->mode == APP_SERVER) + { + /* Send an API message to the external server, to map new segment */ + ASSERT (app->cb_fns.add_segment_callback); + + session_manager_get_segment_info (fifo_segment_index, &seg_name, + &seg_size); + if (app->cb_fns.add_segment_callback (app->api_client_index, seg_name, + seg_size)) + return VNET_API_ERROR_URI_FIFO_CREATE_FAILED; + } + + /* Create the session */ + pool_get (smm->sessions[thread_index], s); + memset (s, 0, sizeof (*s)); + + /* Initialize backpointers */ + pool_index = s - smm->sessions[thread_index]; + server_rx_fifo->server_session_index = pool_index; + server_rx_fifo->server_thread_index = thread_index; + + server_tx_fifo->server_session_index = pool_index; + server_tx_fifo->server_thread_index = thread_index; + + s->server_rx_fifo = server_rx_fifo; + s->server_tx_fifo = server_tx_fifo; + + /* Initialize state machine, such as it is... */ + s->session_type = app->session_type; + s->session_state = SESSION_STATE_CONNECTING; + s->app_index = application_get_index (app); + s->server_segment_index = fifo_segment_index; + s->thread_index = thread_index; + s->session_index = pool_index; + + /* Attach transport to session */ + s->connection_index = tc->c_index; + + /* Attach session to transport */ + tc->s_index = s->session_index; + + /* Add to the main lookup table */ + value = (((u64) thread_index) << 32) | (u64) s->session_index; + stream_session_table_add_for_tc (app->session_type, tc, value); + + *ret_s = s; + + return 0; +} + +/* + * Enqueue data for delivery to session peer. Does not notify peer of enqueue + * event but on request can queue notification events for later delivery by + * calling stream_server_flush_enqueue_events(). + * + * @param tc Transport connection which is to be enqueued data + * @param data Data to be enqueued + * @param len Length of data to be enqueued + * @param queue_event Flag to indicate if peer is to be notified or if event + * is to be queued. The former is useful when more data is + * enqueued and only one event is to be generated. + * @return Number of bytes enqueued or a negative value if enqueueing failed. + */ +int +stream_session_enqueue_data (transport_connection_t * tc, u8 * data, u16 len, + u8 queue_event) +{ + stream_session_t *s; + int enqueued; + + s = stream_session_get (tc->s_index, tc->thread_index); + + /* Make sure there's enough space left. We might've filled the pipes */ + if (PREDICT_FALSE (len > svm_fifo_max_enqueue (s->server_rx_fifo))) + return -1; + + enqueued = svm_fifo_enqueue_nowait (s->server_rx_fifo, s->pid, len, data); + + if (queue_event) + { + /* Queue RX event on this fifo. Eventually these will need to be flushed + * by calling stream_server_flush_enqueue_events () */ + session_manager_main_t *smm = vnet_get_session_manager_main (); + u32 thread_index = s->thread_index; + u32 my_enqueue_epoch = smm->current_enqueue_epoch[thread_index]; + + if (s->enqueue_epoch != my_enqueue_epoch) + { + s->enqueue_epoch = my_enqueue_epoch; + vec_add1 (smm->session_indices_to_enqueue_by_thread[thread_index], + s - smm->sessions[thread_index]); + } + } + + return enqueued; +} + +/** Check if we have space in rx fifo to push more bytes */ +u8 +stream_session_no_space (transport_connection_t * tc, u32 thread_index, + u16 data_len) +{ + stream_session_t *s = stream_session_get (tc->c_index, thread_index); + + if (PREDICT_FALSE (s->session_state != SESSION_STATE_READY)) + return 1; + + if (data_len > svm_fifo_max_enqueue (s->server_rx_fifo)) + return 1; + + return 0; +} + +u32 +stream_session_peek_bytes (transport_connection_t * tc, u8 * buffer, + u32 offset, u32 max_bytes) +{ + stream_session_t *s = stream_session_get (tc->s_index, tc->thread_index); + return svm_fifo_peek (s->server_tx_fifo, s->pid, offset, max_bytes, buffer); +} + +u32 +stream_session_dequeue_drop (transport_connection_t * tc, u32 max_bytes) +{ + stream_session_t *s = stream_session_get (tc->s_index, tc->thread_index); + return svm_fifo_dequeue_drop (s->server_tx_fifo, s->pid, max_bytes); +} + +/** + * Notify session peer that new data has been enqueued. + * + * @param s Stream session for which the event is to be generated. + * @param block Flag to indicate if call should block if event queue is full. + * + * @return 0 on succes or negative number if failed to send notification. + */ +static int +stream_session_enqueue_notify (stream_session_t * s, u8 block) +{ + application_t *app; + session_fifo_event_t evt; + unix_shared_memory_queue_t *q; + static u32 serial_number; + + if (PREDICT_FALSE (s->session_state == SESSION_STATE_CLOSED)) + return 0; + + /* Get session's server */ + app = application_get (s->app_index); + + /* Fabricate event */ + evt.fifo = s->server_rx_fifo; + evt.event_type = FIFO_EVENT_SERVER_RX; + evt.event_id = serial_number++; + evt.enqueue_length = svm_fifo_max_dequeue (s->server_rx_fifo); + + /* Add event to server's event queue */ + q = app->event_queue; + + /* Based on request block (or not) for lack of space */ + if (block || PREDICT_TRUE (q->cursize < q->maxsize)) + unix_shared_memory_queue_add (app->event_queue, (u8 *) & evt, + 0 /* do wait for mutex */ ); + else + return -1; + + if (1) + { + ELOG_TYPE_DECLARE (e) = + { + .format = "evt-enqueue: id %d length %d",.format_args = "i4i4",}; + struct + { + u32 data[2]; + } *ed; + ed = ELOG_DATA (&vlib_global_main.elog_main, e); + ed->data[0] = evt.event_id; + ed->data[1] = evt.enqueue_length; + } + + return 0; +} + +/** + * Flushes queue of sessions that are to be notified of new data + * enqueued events. + * + * @param thread_index Thread index for which the flush is to be performed. + * @return 0 on success or a positive number indicating the number of + * failures due to API queue being full. + */ +int +session_manager_flush_enqueue_events (u32 thread_index) +{ + session_manager_main_t *smm = &session_manager_main; + u32 *session_indices_to_enqueue; + int i, errors = 0; + + session_indices_to_enqueue = + smm->session_indices_to_enqueue_by_thread[thread_index]; + + for (i = 0; i < vec_len (session_indices_to_enqueue); i++) + { + stream_session_t *s0; + + /* Get session */ + s0 = stream_session_get (session_indices_to_enqueue[i], thread_index); + if (stream_session_enqueue_notify (s0, 0 /* don't block */ )) + { + errors++; + } + } + + vec_reset_length (session_indices_to_enqueue); + + smm->session_indices_to_enqueue_by_thread[thread_index] = + session_indices_to_enqueue; + + /* Increment enqueue epoch for next round */ + smm->current_enqueue_epoch[thread_index]++; + + return errors; +} + +/* + * Start listening on server's ip/port pair for requested transport. + * + * Creates a 'dummy' stream session with state LISTENING to be used in session + * lookups, prior to establishing connection. Requests transport to build + * it's own specific listening connection. + */ +int +stream_session_start_listen (u32 server_index, ip46_address_t * ip, u16 port) +{ + session_manager_main_t *smm = &session_manager_main; + stream_session_t *s; + transport_connection_t *tc; + application_t *srv; + u32 tci; + + srv = application_get (server_index); + + pool_get (smm->listen_sessions[srv->session_type], s); + memset (s, 0, sizeof (*s)); + + s->session_type = srv->session_type; + s->session_state = SESSION_STATE_LISTENING; + s->session_index = s - smm->listen_sessions[srv->session_type]; + s->app_index = srv->index; + + /* Transport bind/listen */ + tci = tp_vfts[srv->session_type].bind (smm->vlib_main, s->session_index, ip, + port); + + /* Attach transport to session */ + s->connection_index = tci; + tc = tp_vfts[srv->session_type].get_listener (tci); + + srv->session_index = s->session_index; + + /* Add to the main lookup table */ + stream_session_table_add_for_tc (s->session_type, tc, s->session_index); + + return 0; +} + +void +stream_session_stop_listen (u32 server_index) +{ + session_manager_main_t *smm = &session_manager_main; + stream_session_t *listener; + transport_connection_t *tc; + application_t *srv; + + srv = application_get (server_index); + listener = pool_elt_at_index (smm->listen_sessions[srv->session_type], + srv->session_index); + + tc = tp_vfts[srv->session_type].get_listener (listener->connection_index); + stream_session_table_del_for_tc (smm, listener->session_type, tc); + + tp_vfts[srv->session_type].unbind (smm->vlib_main, + listener->connection_index); + pool_put (smm->listen_sessions[srv->session_type], listener); +} + +int +connect_server_add_segment_cb (application_t * ss, char *segment_name, + u32 segment_size) +{ + /* Does exactly nothing, but die */ + ASSERT (0); + return 0; +} + +void +connects_session_manager_init (session_manager_main_t * smm, u8 session_type) +{ + session_manager_t *sm; + u32 connect_fifo_size = 8 << 10; /* Config? */ + u32 default_segment_size = 1 << 20; + + pool_get (smm->session_managers, sm); + memset (sm, 0, sizeof (*sm)); + + sm->add_segment_size = default_segment_size; + sm->rx_fifo_size = connect_fifo_size; + sm->tx_fifo_size = connect_fifo_size; + sm->add_segment = 1; + + session_manager_add_segment (smm, sm); + smm->connect_manager_index[session_type] = sm - smm->session_managers; +} + +void +stream_session_connect_notify (transport_connection_t * tc, u8 sst, + u8 is_fail) +{ + session_manager_main_t *smm = &session_manager_main; + application_t *app; + stream_session_t *new_s = 0; + u64 value; + + value = stream_session_half_open_lookup (smm, &tc->lcl_ip, &tc->rmt_ip, + tc->lcl_port, tc->rmt_port, + tc->proto); + if (value == HALF_OPEN_LOOKUP_INVALID_VALUE) + { + clib_warning ("This can't be good!"); + return; + } + + app = application_get (value >> 32); + + if (!is_fail) + { + /* Create new session (server segments are allocated if needed) */ + if (stream_session_create_i (smm, app, tc, &new_s)) + return; + + app->session_index = stream_session_get_index (new_s); + app->thread_index = new_s->thread_index; + + /* Allocate vpp event queue for this thread if needed */ + vpp_session_event_queue_allocate (smm, tc->thread_index); + } + + /* Notify client */ + app->cb_fns.session_connected_callback (app->api_client_index, new_s, + is_fail); + + /* Cleanup session lookup */ + stream_session_half_open_table_del (smm, sst, tc); +} + +void +stream_session_accept_notify (transport_connection_t * tc) +{ + application_t *server; + stream_session_t *s; + + s = stream_session_get (tc->s_index, tc->thread_index); + server = application_get (s->app_index); + server->cb_fns.session_accept_callback (s); +} + +/** + * Notification from transport that connection is being closed. + * + * A disconnect is sent to application but state is not removed. Once + * disconnect is acknowledged by application, session disconnect is called. + * Ultimately this leads to close being called on transport (passive close). + */ +void +stream_session_disconnect_notify (transport_connection_t * tc) +{ + application_t *server; + stream_session_t *s; + + s = stream_session_get (tc->s_index, tc->thread_index); + server = application_get (s->app_index); + server->cb_fns.session_disconnect_callback (s); +} + +/** + * Cleans up session and associated app if needed. + */ +void +stream_session_delete (stream_session_t * s) +{ + session_manager_main_t *smm = vnet_get_session_manager_main (); + svm_fifo_segment_private_t *fifo_segment; + application_t *app; + int rv; + + /* delete from the main lookup table */ + rv = stream_session_table_del (smm, s); + + if (rv) + clib_warning ("hash delete error, rv %d", rv); + + /* Cleanup fifo segments */ + fifo_segment = svm_fifo_get_segment (s->server_segment_index); + svm_fifo_segment_free_fifo (fifo_segment, s->server_rx_fifo); + svm_fifo_segment_free_fifo (fifo_segment, s->server_tx_fifo); + + /* Cleanup app if client */ + app = application_get (s->app_index); + if (app->mode == APP_CLIENT) + { + application_del (app); + } + else if (app->mode == APP_SERVER) + { + session_manager_t *sm; + svm_fifo_segment_private_t *fifo_segment; + svm_fifo_t **fifos; + u32 fifo_index; + + sm = session_manager_get (app->session_manager_index); + + /* Delete fifo */ + fifo_segment = svm_fifo_get_segment (s->server_segment_index); + fifos = (svm_fifo_t **) fifo_segment->h->fifos; + + fifo_index = svm_fifo_segment_index (fifo_segment); + + /* Remove segment only if it holds no fifos and not the first */ + if (sm->segment_indices[0] != fifo_index && vec_len (fifos) == 0) + svm_fifo_segment_delete (fifo_segment); + } + + pool_put (smm->sessions[s->thread_index], s); +} + +/** + * Notification from transport that connection is being deleted + * + * This should be called only on previously fully established sessions. For + * instance failed connects should call stream_session_connect_notify and + * indicate that the connect has failed. + */ +void +stream_session_delete_notify (transport_connection_t * tc) +{ + stream_session_t *s; + + s = stream_session_get_if_valid (tc->s_index, tc->thread_index); + if (!s) + { + clib_warning ("Surprised!"); + return; + } + stream_session_delete (s); +} + +/** + * Notify application that connection has been reset. + */ +void +stream_session_reset_notify (transport_connection_t * tc) +{ + stream_session_t *s; + application_t *app; + s = stream_session_get (tc->s_index, tc->thread_index); + + app = application_get (s->app_index); + app->cb_fns.session_reset_callback (s); +} + +/** + * Accept a stream session. Optionally ping the server by callback. + */ +int +stream_session_accept (transport_connection_t * tc, u32 listener_index, + u8 sst, u8 notify) +{ + session_manager_main_t *smm = &session_manager_main; + application_t *server; + stream_session_t *s, *listener; + + int rv; + + /* Find the server */ + listener = pool_elt_at_index (smm->listen_sessions[sst], listener_index); + server = application_get (listener->app_index); + + if ((rv = stream_session_create_i (smm, server, tc, &s))) + return rv; + + /* Allocate vpp event queue for this thread if needed */ + vpp_session_event_queue_allocate (smm, tc->thread_index); + + /* Shoulder-tap the server */ + if (notify) + { + server->cb_fns.session_accept_callback (s); + } + + return 0; +} + +void +stream_session_open (u8 sst, ip46_address_t * addr, u16 port_host_byte_order, + u32 app_index) +{ + transport_connection_t *tc; + u32 tci; + u64 value; + + /* Ask transport to open connection */ + tci = tp_vfts[sst].open (addr, port_host_byte_order); + + /* Get transport connection */ + tc = tp_vfts[sst].get_half_open (tci); + + /* Store api_client_index and transport connection index */ + value = (((u64) app_index) << 32) | (u64) tc->c_index; + + /* Add to the half-open lookup table */ + stream_session_half_open_table_add (sst, tc, value); +} + +/** + * Disconnect session and propagate to transport. This should eventually + * result in a delete notification that allows us to cleanup session state. + * Called for both active/passive disconnects. + */ +void +stream_session_disconnect (stream_session_t * s) +{ + tp_vfts[s->session_type].close (s->connection_index, s->thread_index); + s->session_state = SESSION_STATE_CLOSED; +} + +/** + * Cleanup transport and session state. + */ +void +stream_session_cleanup (stream_session_t * s) +{ + tp_vfts[s->session_type].cleanup (s->connection_index, s->thread_index); + stream_session_delete (s); +} + +void +session_register_transport (u8 type, const transport_proto_vft_t * vft) +{ + session_manager_main_t *smm = vnet_get_session_manager_main (); + + vec_validate (tp_vfts, type); + tp_vfts[type] = *vft; + + /* If an offset function is provided, then peek instead of dequeue */ + smm->session_rx_fns[type] = + (vft->rx_fifo_offset) ? session_fifo_rx_peek : session_fifo_rx_dequeue; +} + +transport_proto_vft_t * +session_get_transport_vft (u8 type) +{ + if (type >= vec_len (tp_vfts)) + return 0; + return &tp_vfts[type]; +} + +static clib_error_t * +session_manager_main_init (vlib_main_t * vm) +{ + u32 num_threads; + vlib_thread_main_t *vtm = vlib_get_thread_main (); + session_manager_main_t *smm = &session_manager_main; + int i; + + smm->vlib_main = vm; + smm->vnet_main = vnet_get_main (); + + num_threads = 1 /* main thread */ + vtm->n_threads; + + if (num_threads < 1) + return clib_error_return (0, "n_thread_stacks not set"); + + /* $$$ config parameters */ + svm_fifo_segment_init (0x200000000ULL /* first segment base VA */ , + 20 /* timeout in seconds */ ); + + /* configure per-thread ** vectors */ + vec_validate (smm->sessions, num_threads - 1); + vec_validate (smm->session_indices_to_enqueue_by_thread, num_threads - 1); + vec_validate (smm->tx_buffers, num_threads - 1); + vec_validate (smm->fifo_events, num_threads - 1); + vec_validate (smm->evts_partially_read, num_threads - 1); + vec_validate (smm->current_enqueue_epoch, num_threads - 1); + vec_validate (smm->vpp_event_queues, num_threads - 1); + + /* $$$$ preallocate hack config parameter */ + for (i = 0; i < 200000; i++) + { + stream_session_t *ss; + pool_get (smm->sessions[0], ss); + memset (ss, 0, sizeof (*ss)); + } + + for (i = 0; i < 200000; i++) + pool_put_index (smm->sessions[0], i); + + clib_bihash_init_16_8 (&smm->v4_session_hash, "v4 session table", + 200000 /* $$$$ config parameter nbuckets */ , + (64 << 20) /*$$$ config parameter table size */ ); + clib_bihash_init_48_8 (&smm->v6_session_hash, "v6 session table", + 200000 /* $$$$ config parameter nbuckets */ , + (64 << 20) /*$$$ config parameter table size */ ); + + clib_bihash_init_16_8 (&smm->v4_half_open_hash, "v4 half-open table", + 200000 /* $$$$ config parameter nbuckets */ , + (64 << 20) /*$$$ config parameter table size */ ); + clib_bihash_init_48_8 (&smm->v6_half_open_hash, "v6 half-open table", + 200000 /* $$$$ config parameter nbuckets */ , + (64 << 20) /*$$$ config parameter table size */ ); + + for (i = 0; i < SESSION_N_TYPES; i++) + smm->connect_manager_index[i] = INVALID_INDEX; + + return 0; +} + +VLIB_INIT_FUNCTION (session_manager_main_init); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/session/session.h b/src/vnet/session/session.h new file mode 100644 index 00000000000..cf14cca9f30 --- /dev/null +++ b/src/vnet/session/session.h @@ -0,0 +1,380 @@ +/* + * Copyright (c) 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. + */ +#ifndef __included_session_h__ +#define __included_session_h__ + +#include +#include +#include +#include +#include + +#define HALF_OPEN_LOOKUP_INVALID_VALUE ((u64)~0) +#define INVALID_INDEX ((u32)~0) + +/* TODO decide how much since we have pre-data as well */ +#define MAX_HDRS_LEN 100 /* Max number of bytes for headers */ + +typedef enum +{ + FIFO_EVENT_SERVER_RX, + FIFO_EVENT_SERVER_TX, + FIFO_EVENT_TIMEOUT, + FIFO_EVENT_SERVER_EXIT, +} fifo_event_type_t; + +#define foreach_session_input_error \ +_(NO_SESSION, "No session drops") \ +_(NO_LISTENER, "No listener for dst port drops") \ +_(ENQUEUED, "Packets pushed into rx fifo") \ +_(NOT_READY, "Session not ready packets") \ +_(FIFO_FULL, "Packets dropped for lack of rx fifo space") \ +_(EVENT_FIFO_FULL, "Events not sent for lack of event fifo space") \ +_(API_QUEUE_FULL, "Sessions not created for lack of API queue space") \ +_(NEW_SEG_NO_SPACE, "Created segment, couldn't allocate a fifo pair") \ +_(NO_SPACE, "Couldn't allocate a fifo pair") + +typedef enum +{ +#define _(sym,str) SESSION_ERROR_##sym, + foreach_session_input_error +#undef _ + SESSION_N_ERROR, +} session_error_t; + +/* Event queue input node static next indices */ +typedef enum +{ + SESSION_QUEUE_NEXT_DROP, + SESSION_QUEUE_NEXT_TCP_IP4_OUTPUT, + SESSION_QUEUE_NEXT_IP4_LOOKUP, + SESSION_QUEUE_NEXT_TCP_IP6_OUTPUT, + SESSION_QUEUE_NEXT_IP6_LOOKUP, + SESSION_QUEUE_N_NEXT, +} session_queue_next_t; + +#define foreach_session_type \ + _(IP4_TCP, ip4_tcp) \ + _(IP4_UDP, ip4_udp) \ + _(IP6_TCP, ip6_tcp) \ + _(IP6_UDP, ip6_udp) + +typedef enum +{ +#define _(A, a) SESSION_TYPE_##A, + foreach_session_type +#undef _ + SESSION_N_TYPES, +} session_type_t; + +/* + * Application session state + */ +typedef enum +{ + SESSION_STATE_LISTENING, + SESSION_STATE_CONNECTING, + SESSION_STATE_READY, + SESSION_STATE_CLOSED, + SESSION_STATE_N_STATES, +} stream_session_state_t; + +typedef CLIB_PACKED (struct + { + svm_fifo_t * fifo; + u8 event_type; + /* $$$$ for event logging */ + u16 event_id; + u32 enqueue_length; + }) session_fifo_event_t; + +typedef struct _stream_session_t +{ + /** Type */ + u8 session_type; + + /** State */ + u8 session_state; + + /** Session index in per_thread pool */ + u32 session_index; + + /** Transport specific */ + u32 connection_index; + + u8 thread_index; + + /** Application specific */ + u32 pid; + + /** fifo pointers. Once allocated, these do not move */ + svm_fifo_t *server_rx_fifo; + svm_fifo_t *server_tx_fifo; + + /** To avoid n**2 "one event per frame" check */ + u8 enqueue_epoch; + + /** used during unbind processing */ + u8 is_deleted; + + /** stream server pool index */ + u32 app_index; + + /** svm segment index */ + u32 server_segment_index; +} stream_session_t; + +typedef struct _session_manager +{ + /** segments mapped by this server */ + u32 *segment_indices; + + /** Session fifo sizes. They are provided for binds and take default + * values for connects */ + u32 rx_fifo_size; + u32 tx_fifo_size; + + /** Configured additional segment size */ + u32 add_segment_size; + + /** Flag that indicates if additional segments should be created */ + u8 add_segment; +} session_manager_t; + +/* Forward definition */ +typedef struct _session_manager_main session_manager_main_t; + +typedef int + (session_fifo_rx_fn) (vlib_main_t * vm, vlib_node_runtime_t * node, + session_manager_main_t * smm, + session_fifo_event_t * e0, stream_session_t * s0, + u32 thread_index, int *n_tx_pkts); + +extern session_fifo_rx_fn session_fifo_rx_peek; +extern session_fifo_rx_fn session_fifo_rx_dequeue; + +struct _session_manager_main +{ + /** Lookup tables for established sessions and listeners */ + clib_bihash_16_8_t v4_session_hash; + clib_bihash_48_8_t v6_session_hash; + + /** Lookup tables for half-open sessions */ + clib_bihash_16_8_t v4_half_open_hash; + clib_bihash_48_8_t v6_half_open_hash; + + /** Per worker thread session pools */ + stream_session_t **sessions; + + /** Pool of listen sessions. Same type as stream sessions to ease lookups */ + stream_session_t *listen_sessions[SESSION_N_TYPES]; + + /** Sparse vector to map dst port to stream server */ + u16 *stream_server_by_dst_port[SESSION_N_TYPES]; + + /** per-worker enqueue epoch counters */ + u8 *current_enqueue_epoch; + + /** Per-worker thread vector of sessions to enqueue */ + u32 **session_indices_to_enqueue_by_thread; + + /** per-worker tx buffer free lists */ + u32 **tx_buffers; + + /** Per worker-thread vector of partially read events */ + session_fifo_event_t **evts_partially_read; + + /** per-worker active event vectors */ + session_fifo_event_t **fifo_events; + + /** vpp fifo event queue */ + unix_shared_memory_queue_t **vpp_event_queues; + + /** Unique segment name counter */ + u32 unique_segment_name_counter; + + /* Connection manager used by incoming connects */ + u32 connect_manager_index[SESSION_N_TYPES]; + + session_manager_t *session_managers; + + /** Per transport rx function that can either dequeue or peek */ + session_fifo_rx_fn *session_rx_fns[SESSION_N_TYPES]; + + /* Convenience */ + vlib_main_t *vlib_main; + vnet_main_t *vnet_main; +}; + +extern session_manager_main_t session_manager_main; + +/* + * Session manager function + */ +always_inline session_manager_main_t * +vnet_get_session_manager_main () +{ + return &session_manager_main; +} + +always_inline session_manager_t * +session_manager_get (u32 index) +{ + return pool_elt_at_index (session_manager_main.session_managers, index); +} + +always_inline unix_shared_memory_queue_t * +session_manager_get_vpp_event_queue (u32 thread_index) +{ + return session_manager_main.vpp_event_queues[thread_index]; +} + +always_inline session_manager_t * +connects_session_manager_get (session_manager_main_t * smm, + session_type_t session_type) +{ + return pool_elt_at_index (smm->session_managers, + smm->connect_manager_index[session_type]); +} + +void session_manager_get_segment_info (u32 index, u8 ** name, u32 * size); +int session_manager_flush_enqueue_events (u32 thread_index); +int +session_manager_add_first_segment (session_manager_main_t * smm, + session_manager_t * sm, u32 segment_size, + u8 ** segment_name); +void +session_manager_del (session_manager_main_t * smm, session_manager_t * sm); +void +connects_session_manager_init (session_manager_main_t * smm, u8 session_type); + +/* + * Stream session functions + */ + +stream_session_t *stream_session_lookup_listener4 (ip4_address_t * lcl, + u16 lcl_port, u8 proto); +stream_session_t *stream_session_lookup4 (ip4_address_t * lcl, + ip4_address_t * rmt, u16 lcl_port, + u16 rmt_port, u8 proto, + u32 thread_index); +stream_session_t *stream_session_lookup_listener6 (ip6_address_t * lcl, + u16 lcl_port, u8 proto); +stream_session_t *stream_session_lookup6 (ip6_address_t * lcl, + ip6_address_t * rmt, u16 lcl_port, + u16 rmt_port, u8, u32 thread_index); +transport_connection_t + * stream_session_lookup_transport4 (session_manager_main_t * smm, + ip4_address_t * lcl, + ip4_address_t * rmt, u16 lcl_port, + u16 rmt_port, u8 proto, + u32 thread_index); +transport_connection_t + * stream_session_lookup_transport6 (session_manager_main_t * smm, + ip6_address_t * lcl, + ip6_address_t * rmt, u16 lcl_port, + u16 rmt_port, u8 proto, + u32 thread_index); +stream_session_t *stream_session_lookup_listener (ip46_address_t * lcl, + u16 lcl_port, u8 proto); + +always_inline stream_session_t * +stream_session_get_tsi (u64 ti_and_si, u32 thread_index) +{ + ASSERT ((u32) (ti_and_si >> 32) == thread_index); + return pool_elt_at_index (session_manager_main.sessions[thread_index], + ti_and_si & 0xFFFFFFFFULL); +} + +always_inline stream_session_t * +stream_session_get (u64 si, u32 thread_index) +{ + return pool_elt_at_index (session_manager_main.sessions[thread_index], si); +} + +always_inline stream_session_t * +stream_session_get_if_valid (u64 si, u32 thread_index) +{ + if (thread_index >= vec_len (session_manager_main.sessions)) + return 0; + + if (pool_is_free_index (session_manager_main.sessions[thread_index], si)) + return 0; + + return pool_elt_at_index (session_manager_main.sessions[thread_index], si); +} + +always_inline stream_session_t * +stream_session_listener_get (u8 sst, u64 si) +{ + return pool_elt_at_index (session_manager_main.listen_sessions[sst], si); +} + +always_inline u32 +stream_session_get_index (stream_session_t * s) +{ + if (s->session_state == SESSION_STATE_LISTENING) + return s - session_manager_main.listen_sessions[s->session_type]; + + return s - session_manager_main.sessions[s->thread_index]; +} + +always_inline u32 +stream_session_max_enqueue (transport_connection_t * tc) +{ + stream_session_t *s = stream_session_get (tc->s_index, tc->thread_index); + return svm_fifo_max_enqueue (s->server_rx_fifo); +} + +int +stream_session_enqueue_data (transport_connection_t * tc, u8 * data, u16 len, + u8 queue_event); +u32 +stream_session_peek_bytes (transport_connection_t * tc, u8 * buffer, + u32 offset, u32 max_bytes); +u32 stream_session_dequeue_drop (transport_connection_t * tc, u32 max_bytes); + +void +stream_session_connect_notify (transport_connection_t * tc, u8 sst, + u8 is_fail); +void stream_session_accept_notify (transport_connection_t * tc); +void stream_session_disconnect_notify (transport_connection_t * tc); +void stream_session_delete_notify (transport_connection_t * tc); +void stream_session_reset_notify (transport_connection_t * tc); +int +stream_session_accept (transport_connection_t * tc, u32 listener_index, + u8 sst, u8 notify); +void stream_session_open (u8 sst, ip46_address_t * addr, + u16 port_host_byte_order, u32 api_client_index); +void stream_session_disconnect (stream_session_t * s); +void stream_session_cleanup (stream_session_t * s); +int +stream_session_start_listen (u32 server_index, ip46_address_t * ip, u16 port); +void stream_session_stop_listen (u32 server_index); + +u8 *format_stream_session (u8 * s, va_list * args); + +void session_register_transport (u8 type, const transport_proto_vft_t * vft); +transport_proto_vft_t *session_get_transport_vft (u8 type); + +#endif /* __included_session_h__ */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/session/session_api.c b/src/vnet/session/session_api.c new file mode 100644 index 00000000000..9d068684636 --- /dev/null +++ b/src/vnet/session/session_api.c @@ -0,0 +1,821 @@ +/* + * Copyright (c) 2015-2016 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 "application_interface.h" + +#define vl_typedefs /* define message structures */ +#include +#undef vl_typedefs + +#define vl_endianfun /* define message structures */ +#include +#undef vl_endianfun + +/* instantiate all the print functions we know about */ +#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__) +#define vl_printfun +#include +#undef vl_printfun + +#include + +#define foreach_session_api_msg \ +_(MAP_ANOTHER_SEGMENT_REPLY, map_another_segment_reply) \ +_(BIND_URI, bind_uri) \ +_(UNBIND_URI, unbind_uri) \ +_(CONNECT_URI, connect_uri) \ +_(DISCONNECT_SESSION, disconnect_session) \ +_(DISCONNECT_SESSION_REPLY, disconnect_session_reply) \ +_(ACCEPT_SESSION_REPLY, accept_session_reply) \ +_(RESET_SESSION_REPLY, reset_session_reply) \ +_(BIND_SOCK, bind_sock) \ +_(UNBIND_SOCK, unbind_sock) \ +_(CONNECT_SOCK, connect_sock) \ +_(DISCONNECT_SOCK, disconnect_sock) \ +_(DISCONNECT_SOCK_REPLY, disconnect_sock_reply) \ +_(ACCEPT_SOCK_REPLY, accept_sock_reply) \ +_(RESET_SOCK_REPLY, reset_sock_reply) \ + +static int +send_add_segment_callback (u32 api_client_index, const u8 * segment_name, + u32 segment_size) +{ + vl_api_map_another_segment_t *mp; + unix_shared_memory_queue_t *q; + + q = vl_api_client_index_to_input_queue (api_client_index); + + if (!q) + return -1; + + mp = vl_msg_api_alloc (sizeof (*mp)); + memset (mp, 0, sizeof (*mp)); + mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_MAP_ANOTHER_SEGMENT); + mp->segment_size = segment_size; + strncpy ((char *) mp->segment_name, (char *) segment_name, + sizeof (mp->segment_name) - 1); + + vl_msg_api_send_shmem (q, (u8 *) & mp); + + return 0; +} + +static int +send_session_accept_uri_callback (stream_session_t * s) +{ + vl_api_accept_session_t *mp; + unix_shared_memory_queue_t *q, *vpp_queue; + application_t *server = application_get (s->app_index); + + q = vl_api_client_index_to_input_queue (server->api_client_index); + vpp_queue = session_manager_get_vpp_event_queue (s->thread_index); + + if (!q) + return -1; + + mp = vl_msg_api_alloc (sizeof (*mp)); + mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_ACCEPT_SESSION); + + /* Note: session_type is the first octet in all types of sessions */ + + mp->accept_cookie = server->accept_cookie; + mp->server_rx_fifo = (u64) s->server_rx_fifo; + mp->server_tx_fifo = (u64) s->server_tx_fifo; + mp->session_thread_index = s->thread_index; + mp->session_index = s->session_index; + mp->session_type = s->session_type; + mp->vpp_event_queue_address = (u64) vpp_queue; + vl_msg_api_send_shmem (q, (u8 *) & mp); + + return 0; +} + +static void +send_session_disconnect_uri_callback (stream_session_t * s) +{ + vl_api_disconnect_session_t *mp; + unix_shared_memory_queue_t *q; + application_t *app = application_get (s->app_index); + + q = vl_api_client_index_to_input_queue (app->api_client_index); + + if (!q) + return; + + mp = vl_msg_api_alloc (sizeof (*mp)); + memset (mp, 0, sizeof (*mp)); + mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_DISCONNECT_SESSION); + + mp->session_thread_index = s->thread_index; + mp->session_index = s->session_index; + vl_msg_api_send_shmem (q, (u8 *) & mp); +} + +static int +send_session_connected_uri_callback (u32 api_client_index, + stream_session_t * s, u8 is_fail) +{ + vl_api_connect_uri_reply_t *mp; + unix_shared_memory_queue_t *q; + application_t *app = application_lookup (api_client_index); + u8 *seg_name; + unix_shared_memory_queue_t *vpp_queue; + + q = vl_api_client_index_to_input_queue (app->api_client_index); + + if (!q) + return -1; + + mp = vl_msg_api_alloc (sizeof (*mp)); + mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_CONNECT_URI_REPLY); + mp->context = app->api_context; + mp->retval = is_fail; + if (!is_fail) + { + vpp_queue = session_manager_get_vpp_event_queue (s->thread_index); + mp->server_rx_fifo = (u64) s->server_rx_fifo; + mp->server_tx_fifo = (u64) s->server_tx_fifo; + mp->session_thread_index = s->thread_index; + mp->session_index = s->session_index; + mp->session_type = s->session_type; + mp->vpp_event_queue_address = (u64) vpp_queue; + mp->client_event_queue_address = (u64) app->event_queue; + + session_manager_get_segment_info (s->server_segment_index, &seg_name, + &mp->segment_size); + mp->segment_name_length = vec_len (seg_name); + if (mp->segment_name_length) + clib_memcpy (mp->segment_name, seg_name, mp->segment_name_length); + } + + vl_msg_api_send_shmem (q, (u8 *) & mp); + + /* Remove client if connect failed */ + if (is_fail) + application_del (app); + + return 0; +} + +/** + * Redirect a connect_uri message to the indicated server. + * Only sent if the server has bound the related port with + * URI_OPTIONS_FLAGS_USE_FIFO + */ +static int +redirect_connect_uri_callback (u32 server_api_client_index, void *mp_arg) +{ + vl_api_connect_uri_t *mp = mp_arg; + unix_shared_memory_queue_t *server_q, *client_q; + vlib_main_t *vm = vlib_get_main (); + f64 timeout = vlib_time_now (vm) + 0.5; + int rv = 0; + + server_q = vl_api_client_index_to_input_queue (server_api_client_index); + + if (!server_q) + { + rv = VNET_API_ERROR_INVALID_VALUE; + goto out; + } + + client_q = vl_api_client_index_to_input_queue (mp->client_index); + if (!client_q) + { + rv = VNET_API_ERROR_INVALID_VALUE_2; + goto out; + } + + /* Tell the server the client's API queue address, so it can reply */ + mp->client_queue_address = (u64) client_q; + + /* + * Bounce message handlers MUST NOT block the data-plane. + * Spin waiting for the queue lock, but + */ + + while (vlib_time_now (vm) < timeout) + { + rv = + unix_shared_memory_queue_add (server_q, (u8 *) & mp, 1 /*nowait */ ); + switch (rv) + { + /* correctly enqueued */ + case 0: + return VNET_CONNECT_REDIRECTED; + + /* continue spinning, wait for pthread_mutex_trylock to work */ + case -1: + continue; + + /* queue stuffed, drop the msg */ + case -2: + rv = VNET_API_ERROR_QUEUE_FULL; + goto out; + } + } +out: + /* Dispose of the message */ + vl_msg_api_free (mp); + return rv; +} + +static u64 +make_session_handle (stream_session_t * s) +{ + return (u64) s->session_index << 32 | (u64) s->thread_index; +} + +static int +send_session_accept_callback (stream_session_t * s) +{ + vl_api_accept_sock_t *mp; + unix_shared_memory_queue_t *q, *vpp_queue; + application_t *server = application_get (s->app_index); + + q = vl_api_client_index_to_input_queue (server->api_client_index); + vpp_queue = session_manager_get_vpp_event_queue (s->thread_index); + + if (!q) + return -1; + + mp = vl_msg_api_alloc (sizeof (*mp)); + mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_ACCEPT_SOCK); + + /* Note: session_type is the first octet in all types of sessions */ + + mp->accept_cookie = server->accept_cookie; + mp->server_rx_fifo = (u64) s->server_rx_fifo; + mp->server_tx_fifo = (u64) s->server_tx_fifo; + mp->handle = make_session_handle (s); + mp->vpp_event_queue_address = (u64) vpp_queue; + vl_msg_api_send_shmem (q, (u8 *) & mp); + + return 0; +} + +static int +send_session_connected_callback (u32 api_client_index, stream_session_t * s, + u8 is_fail) +{ + vl_api_connect_sock_reply_t *mp; + unix_shared_memory_queue_t *q; + application_t *app = application_lookup (api_client_index); + u8 *seg_name; + unix_shared_memory_queue_t *vpp_queue; + + q = vl_api_client_index_to_input_queue (app->api_client_index); + + if (!q) + return -1; + + mp = vl_msg_api_alloc (sizeof (*mp)); + mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_CONNECT_SOCK_REPLY); + mp->context = app->api_context; + mp->retval = is_fail; + if (!is_fail) + { + vpp_queue = session_manager_get_vpp_event_queue (s->thread_index); + mp->server_rx_fifo = (u64) s->server_rx_fifo; + mp->server_tx_fifo = (u64) s->server_tx_fifo; + mp->handle = make_session_handle (s); + mp->vpp_event_queue_address = (u64) vpp_queue; + mp->client_event_queue_address = (u64) app->event_queue; + + session_manager_get_segment_info (s->server_segment_index, &seg_name, + &mp->segment_size); + mp->segment_name_length = vec_len (seg_name); + if (mp->segment_name_length) + clib_memcpy (mp->segment_name, seg_name, mp->segment_name_length); + } + + vl_msg_api_send_shmem (q, (u8 *) & mp); + + /* Remove client if connect failed */ + if (is_fail) + application_del (app); + + return 0; +} + +static void +send_session_disconnect_callback (stream_session_t * s) +{ + vl_api_disconnect_sock_t *mp; + unix_shared_memory_queue_t *q; + application_t *app = application_get (s->app_index); + + q = vl_api_client_index_to_input_queue (app->api_client_index); + + if (!q) + return; + + mp = vl_msg_api_alloc (sizeof (*mp)); + memset (mp, 0, sizeof (*mp)); + mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_DISCONNECT_SOCK); + + mp->handle = make_session_handle (s); + vl_msg_api_send_shmem (q, (u8 *) & mp); +} + +/** + * Redirect a connect_uri message to the indicated server. + * Only sent if the server has bound the related port with + * URI_OPTIONS_FLAGS_USE_FIFO + */ +static int +redirect_connect_callback (u32 server_api_client_index, void *mp_arg) +{ + vl_api_connect_sock_t *mp = mp_arg; + unix_shared_memory_queue_t *server_q, *client_q; + vlib_main_t *vm = vlib_get_main (); + f64 timeout = vlib_time_now (vm) + 0.5; + int rv = 0; + + server_q = vl_api_client_index_to_input_queue (server_api_client_index); + + if (!server_q) + { + rv = VNET_API_ERROR_INVALID_VALUE; + goto out; + } + + client_q = vl_api_client_index_to_input_queue (mp->client_index); + if (!client_q) + { + rv = VNET_API_ERROR_INVALID_VALUE_2; + goto out; + } + + /* Tell the server the client's API queue address, so it can reply */ + mp->client_queue_address = (u64) client_q; + + /* + * Bounce message handlers MUST NOT block the data-plane. + * Spin waiting for the queue lock, but + */ + + while (vlib_time_now (vm) < timeout) + { + rv = + unix_shared_memory_queue_add (server_q, (u8 *) & mp, 1 /*nowait */ ); + switch (rv) + { + /* correctly enqueued */ + case 0: + return VNET_CONNECT_REDIRECTED; + + /* continue spinning, wait for pthread_mutex_trylock to work */ + case -1: + continue; + + /* queue stuffed, drop the msg */ + case -2: + rv = VNET_API_ERROR_QUEUE_FULL; + goto out; + } + } +out: + /* Dispose of the message */ + vl_msg_api_free (mp); + return rv; +} + +static session_cb_vft_t uri_session_cb_vft = { + .session_accept_callback = send_session_accept_uri_callback, + .session_disconnect_callback = send_session_disconnect_uri_callback, + .session_connected_callback = send_session_connected_uri_callback, + .add_segment_callback = send_add_segment_callback, + .redirect_connect_callback = redirect_connect_uri_callback +}; + +static session_cb_vft_t session_cb_vft = { + .session_accept_callback = send_session_accept_callback, + .session_disconnect_callback = send_session_disconnect_callback, + .session_connected_callback = send_session_connected_callback, + .add_segment_callback = send_add_segment_callback, + .redirect_connect_callback = redirect_connect_callback +}; + +static int +api_session_not_valid (u32 session_index, u32 thread_index) +{ + session_manager_main_t *smm = vnet_get_session_manager_main (); + stream_session_t *pool; + + if (thread_index >= vec_len (smm->sessions)) + return VNET_API_ERROR_INVALID_VALUE; + + pool = smm->sessions[thread_index]; + + if (pool_is_free_index (pool, session_index)) + return VNET_API_ERROR_INVALID_VALUE_2; + + return 0; +} + +static void +vl_api_bind_uri_t_handler (vl_api_bind_uri_t * mp) +{ + vl_api_bind_uri_reply_t *rmp; + vnet_bind_args_t _a, *a = &_a; + char segment_name[128]; + u32 segment_name_length; + int rv; + + _Static_assert (sizeof (u64) * SESSION_OPTIONS_N_OPTIONS <= + sizeof (mp->options), + "Out of options, fix api message definition"); + + segment_name_length = ARRAY_LEN (segment_name); + + memset (a, 0, sizeof (*a)); + + a->uri = (char *) mp->uri; + a->api_client_index = mp->client_index; + a->options = mp->options; + a->segment_name = segment_name; + a->segment_name_length = segment_name_length; + a->session_cb_vft = &uri_session_cb_vft; + + a->options[SESSION_OPTIONS_SEGMENT_SIZE] = mp->initial_segment_size; + a->options[SESSION_OPTIONS_ACCEPT_COOKIE] = mp->accept_cookie; + rv = vnet_bind_uri (a); + + /* *INDENT-OFF* */ + REPLY_MACRO2 (VL_API_BIND_URI_REPLY, ({ + rmp->retval = rv; + if (!rv) + { + rmp->segment_name_length = 0; + /* $$$$ policy? */ + rmp->segment_size = mp->initial_segment_size; + if (segment_name_length) + { + memcpy (rmp->segment_name, segment_name, segment_name_length); + rmp->segment_name_length = segment_name_length; + } + rmp->server_event_queue_address = a->server_event_queue_address; + } + })); + /* *INDENT-ON* */ + +} + +static void +vl_api_unbind_uri_t_handler (vl_api_unbind_uri_t * mp) +{ + vl_api_unbind_uri_reply_t *rmp; + int rv; + + rv = vnet_unbind_uri ((char *) mp->uri, mp->client_index); + + REPLY_MACRO (VL_API_UNBIND_URI_REPLY); +} + +static void +vl_api_connect_uri_t_handler (vl_api_connect_uri_t * mp) +{ + vnet_connect_args_t _a, *a = &_a; + + a->uri = (char *) mp->uri; + a->api_client_index = mp->client_index; + a->api_context = mp->context; + a->options = mp->options; + a->session_cb_vft = &uri_session_cb_vft; + a->mp = mp; + vnet_connect_uri (a); +} + +static void +vl_api_disconnect_session_t_handler (vl_api_disconnect_session_t * mp) +{ + vl_api_disconnect_session_reply_t *rmp; + int rv; + + rv = api_session_not_valid (mp->session_index, mp->session_thread_index); + if (!rv) + rv = vnet_disconnect_session (mp->client_index, mp->session_index, + mp->session_thread_index); + + REPLY_MACRO (VL_API_DISCONNECT_SESSION_REPLY); +} + +static void +vl_api_disconnect_session_reply_t_handler (vl_api_disconnect_session_reply_t * + mp) +{ + if (api_session_not_valid (mp->session_index, mp->session_thread_index)) + { + clib_warning ("Invalid session!"); + return; + } + + /* Client objected to disconnecting the session, log and continue */ + if (mp->retval) + { + clib_warning ("client retval %d", mp->retval); + return; + } + + /* Disconnect has been confirmed. Confirm close to transport */ + vnet_disconnect_session (mp->client_index, mp->session_index, + mp->session_thread_index); +} + +static void +vl_api_reset_session_reply_t_handler (vl_api_reset_session_reply_t * mp) +{ + stream_session_t *s; + + if (api_session_not_valid (mp->session_index, mp->session_thread_index)) + { + clib_warning ("Invalid session!"); + return; + } + + /* Client objected to resetting the session, log and continue */ + if (mp->retval) + { + clib_warning ("client retval %d", mp->retval); + return; + } + + s = stream_session_get (mp->session_index, mp->session_thread_index); + + /* This comes as a response to a reset, transport only waiting for + * confirmation to remove connection state, no need to disconnect */ + stream_session_cleanup (s); +} + +static void +vl_api_accept_session_reply_t_handler (vl_api_accept_session_reply_t * mp) +{ + stream_session_t *s; + int rv; + + if (api_session_not_valid (mp->session_index, mp->session_thread_index)) + return; + + s = stream_session_get (mp->session_index, mp->session_thread_index); + rv = mp->retval; + + if (rv) + { + /* Server isn't interested, kill the session */ + stream_session_disconnect (s); + return; + } + + s->session_state = SESSION_STATE_READY; +} + +static void +vl_api_map_another_segment_reply_t_handler (vl_api_map_another_segment_reply_t + * mp) +{ + clib_warning ("not implemented"); +} + +static void +vl_api_bind_sock_t_handler (vl_api_bind_sock_t * mp) +{ + vl_api_bind_sock_reply_t *rmp; + vnet_bind_args_t _a, *a = &_a; + char segment_name[128]; + u32 segment_name_length; + int rv; + + STATIC_ASSERT (sizeof (u64) * SESSION_OPTIONS_N_OPTIONS <= + sizeof (mp->options), + "Out of options, fix api message definition"); + + segment_name_length = ARRAY_LEN (segment_name); + + memset (a, 0, sizeof (*a)); + + clib_memcpy (&a->tep.ip, mp->ip, + (mp->is_ip4 ? sizeof (ip4_address_t) : + sizeof (ip6_address_t))); + a->tep.is_ip4 = mp->is_ip4; + a->tep.port = mp->port; + a->tep.vrf = mp->vrf; + + a->api_client_index = mp->client_index; + a->options = mp->options; + a->segment_name = segment_name; + a->segment_name_length = segment_name_length; + a->session_cb_vft = &session_cb_vft; + + rv = vnet_bind_uri (a); + + /* *INDENT-OFF* */ + REPLY_MACRO2 (VL_API_BIND_SOCK_REPLY, ({ + rmp->retval = rv; + if (!rv) + { + rmp->segment_name_length = 0; + rmp->segment_size = mp->options[SESSION_OPTIONS_SEGMENT_SIZE]; + if (segment_name_length) + { + memcpy(rmp->segment_name, segment_name, segment_name_length); + rmp->segment_name_length = segment_name_length; + } + rmp->server_event_queue_address = a->server_event_queue_address; + } + })); + /* *INDENT-ON* */ +} + +static void +vl_api_unbind_sock_t_handler (vl_api_unbind_sock_t * mp) +{ + vl_api_unbind_sock_reply_t *rmp; + vnet_unbind_args_t _a, *a = &_a; + int rv; + + a->api_client_index = mp->client_index; + a->handle = mp->handle; + + rv = vnet_unbind (a); + + REPLY_MACRO (VL_API_UNBIND_SOCK_REPLY); +} + +static void +vl_api_connect_sock_t_handler (vl_api_connect_sock_t * mp) +{ + vnet_connect_args_t _a, *a = &_a; + + clib_memcpy (&a->tep.ip, mp->ip, + (mp->is_ip4 ? sizeof (ip4_address_t) : + sizeof (ip6_address_t))); + a->tep.is_ip4 = mp->is_ip4; + a->tep.port = mp->port; + a->tep.vrf = mp->vrf; + a->options = mp->options; + a->session_cb_vft = &session_cb_vft; + a->api_context = mp->context; + a->mp = mp; + + vnet_connect (a); +} + +static void +vl_api_disconnect_sock_t_handler (vl_api_disconnect_sock_t * mp) +{ + vnet_disconnect_args_t _a, *a = &_a; + vl_api_disconnect_sock_reply_t *rmp; + int rv; + + a->api_client_index = mp->client_index; + a->handle = mp->handle; + rv = vnet_disconnect (a); + + REPLY_MACRO (VL_API_DISCONNECT_SOCK_REPLY); +} + +static void +vl_api_disconnect_sock_reply_t_handler (vl_api_disconnect_sock_reply_t * mp) +{ + vnet_disconnect_args_t _a, *a = &_a; + + /* Client objected to disconnecting the session, log and continue */ + if (mp->retval) + { + clib_warning ("client retval %d", mp->retval); + return; + } + + a->api_client_index = mp->client_index; + a->handle = mp->handle; + + vnet_disconnect (a); +} + +static void +vl_api_reset_sock_reply_t_handler (vl_api_reset_sock_reply_t * mp) +{ + stream_session_t *s; + u32 session_index, thread_index; + + /* Client objected to resetting the session, log and continue */ + if (mp->retval) + { + clib_warning ("client retval %d", mp->retval); + return; + } + + if (api_parse_session_handle (mp->handle, &session_index, &thread_index)) + { + clib_warning ("Invalid handle"); + return; + } + + s = stream_session_get (session_index, thread_index); + + /* This comes as a response to a reset, transport only waiting for + * confirmation to remove connection state, no need to disconnect */ + stream_session_cleanup (s); +} + +static void +vl_api_accept_sock_reply_t_handler (vl_api_accept_sock_reply_t * mp) +{ + stream_session_t *s; + u32 session_index, thread_index; + + if (api_parse_session_handle (mp->handle, &session_index, &thread_index)) + { + clib_warning ("Invalid handle"); + return; + } + s = stream_session_get (session_index, thread_index); + + if (mp->retval) + { + /* Server isn't interested, kill the session */ + stream_session_disconnect (s); + return; + } + + s->session_state = SESSION_STATE_READY; +} + +#define vl_msg_name_crc_list +#include +#undef vl_msg_name_crc_list + +static void +setup_message_id_table (api_main_t * am) +{ +#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id); + foreach_vl_msg_name_crc_session; +#undef _ +} + +/* + * session_api_hookup + * Add uri's API message handlers to the table. + * vlib has alread mapped shared memory and + * added the client registration handlers. + * See .../open-repo/vlib/memclnt_vlib.c:memclnt_process() + */ +static clib_error_t * +session_api_hookup (vlib_main_t * vm) +{ + api_main_t *am = &api_main; + +#define _(N,n) \ + vl_msg_api_set_handlers(VL_API_##N, #n, \ + vl_api_##n##_t_handler, \ + vl_noop_handler, \ + vl_api_##n##_t_endian, \ + vl_api_##n##_t_print, \ + sizeof(vl_api_##n##_t), 1); + foreach_session_api_msg; +#undef _ + + /* + * Messages which bounce off the data-plane to + * an API client. Simply tells the message handling infra not + * to free the message. + * + * Bounced message handlers MUST NOT block the data plane + */ + am->message_bounce[VL_API_CONNECT_URI] = 1; + am->message_bounce[VL_API_CONNECT_SOCK] = 1; + + /* + * Set up the (msg_name, crc, message-id) table + */ + setup_message_id_table (am); + + return 0; +} + +VLIB_API_INIT_FUNCTION (session_api_hookup); +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/session/session_cli.c b/src/vnet/session/session_cli.c new file mode 100644 index 00000000000..b2943a1ccc5 --- /dev/null +++ b/src/vnet/session/session_cli.c @@ -0,0 +1,189 @@ +/* + * Copyright (c) 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 + +/** + * Format stream session as per the following format + * + * verbose: + * "Connection", "Rx fifo", "Tx fifo", "Session Index" + * non-verbose: + * "Connection" + */ +u8 * +format_stream_session (u8 * s, va_list * args) +{ + stream_session_t *ss = va_arg (*args, stream_session_t *); + int verbose = va_arg (*args, int); + transport_proto_vft_t *tp_vft; + u8 *str = 0; + + tp_vft = session_get_transport_vft (ss->session_type); + + if (verbose) + str = format (0, "%-20llp%-20llp%-15lld", ss->server_rx_fifo, + ss->server_tx_fifo, stream_session_get_index (ss)); + + if (ss->session_state == SESSION_STATE_READY) + { + s = format (s, "%-40U%v", tp_vft->format_connection, + ss->connection_index, ss->thread_index, str); + } + else if (ss->session_state == SESSION_STATE_LISTENING) + { + s = format (s, "%-40U%v", tp_vft->format_listener, ss->connection_index, + str); + } + else if (ss->session_state == SESSION_STATE_READY) + { + s = + format (s, "%-40U%v", tp_vft->format_half_open, ss->connection_index, + str); + } + else if (ss->session_state == SESSION_STATE_CLOSED) + { + s = format (s, "[CL] %-40U%v", tp_vft->format_connection, + ss->connection_index, ss->thread_index, str); + } + else + { + clib_warning ("Session in unknown state!"); + } + + vec_free (str); + + return s; +} + +static clib_error_t * +show_session_command_fn (vlib_main_t * vm, unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + session_manager_main_t *smm = &session_manager_main; + int verbose = 0, i; + stream_session_t *pool; + stream_session_t *s; + u8 *str = 0; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "verbose")) + verbose = 1; + else + break; + } + + for (i = 0; i < vec_len (smm->sessions); i++) + { + u32 once_per_pool; + pool = smm->sessions[i]; + + once_per_pool = 1; + + if (pool_elts (pool)) + { + + vlib_cli_output (vm, "Thread %d: %d active sessions", + i, pool_elts (pool)); + if (verbose) + { + if (once_per_pool) + { + str = format (str, "%-40s%-20s%-20s%-15s", + "Connection", "Rx fifo", "Tx fifo", + "Session Index"); + vlib_cli_output (vm, "%v", str); + vec_reset_length (str); + once_per_pool = 0; + } + + /* *INDENT-OFF* */ + pool_foreach (s, pool, + ({ + vlib_cli_output (vm, "%U", format_stream_session, s, verbose); + })); + /* *INDENT-ON* */ + } + } + else + vlib_cli_output (vm, "Thread %d: no active sessions", i); + } + vec_free (str); + + return 0; +} + +VLIB_CLI_COMMAND (show_uri_command, static) = +{ +.path = "show session",.short_help = "show session [verbose]",.function = + show_session_command_fn,}; + + +static clib_error_t * +clear_session_command_fn (vlib_main_t * vm, unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + session_manager_main_t *smm = &session_manager_main; + u32 thread_index = 0; + u32 session_index = ~0; + stream_session_t *pool, *session; + application_t *server; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "thread %d", &thread_index)) + ; + else if (unformat (input, "session %d", &session_index)) + ; + else + return clib_error_return (0, "unknown input `%U'", + format_unformat_error, input); + } + + if (session_index == ~0) + return clib_error_return (0, "session required, but not set."); + + if (thread_index > vec_len (smm->sessions)) + return clib_error_return (0, "thread %d out of range [0-%d]", + thread_index, vec_len (smm->sessions)); + + pool = smm->sessions[thread_index]; + + if (pool_is_free_index (pool, session_index)) + return clib_error_return (0, "session %d not active", session_index); + + session = pool_elt_at_index (pool, session_index); + server = application_get (session->app_index); + + /* Disconnect both app and transport */ + server->cb_fns.session_disconnect_callback (session); + + return 0; +} + +VLIB_CLI_COMMAND (clear_uri_session_command, static) = +{ +.path = "clear session",.short_help = + "clear session thread session ",.function = + clear_session_command_fn,}; + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/session/transport.c b/src/vnet/session/transport.c new file mode 100644 index 00000000000..abd94ba4f1d --- /dev/null +++ b/src/vnet/session/transport.c @@ -0,0 +1,64 @@ +/* + * Copyright (c) 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 + +u32 +transport_endpoint_lookup (transport_endpoint_table_t *ht, ip46_address_t *ip, + u16 port) +{ + clib_bihash_kv_24_8_t kv; + int rv; + + kv.key[0] = ip->as_u64[0]; + kv.key[1] = ip->as_u64[1]; + kv.key[2] = port; + + rv = clib_bihash_search_inline_24_8 (ht, &kv); + if (rv == 0) + return kv.value; + + return TRANSPORT_ENDPOINT_INVALID_INDEX; +} + +void +transport_endpoint_table_add (transport_endpoint_table_t *ht, + transport_endpoint_t *te, u32 value) +{ + clib_bihash_kv_24_8_t kv; + + kv.key[0] = te->ip.as_u64[0]; + kv.key[1] = te->ip.as_u64[1]; + kv.key[2] = te->port; + kv.value = value; + + clib_bihash_add_del_24_8 (ht, &kv, 1); +} + +void +transport_endpoint_table_del (transport_endpoint_table_t *ht, + transport_endpoint_t *te) +{ + clib_bihash_kv_24_8_t kv; + + kv.key[0] = te->ip.as_u64[0]; + kv.key[1] = te->ip.as_u64[1]; + kv.key[2] = te->port; + + clib_bihash_add_del_24_8 (ht, &kv, 0); +} + + + diff --git a/src/vnet/session/transport.h b/src/vnet/session/transport.h new file mode 100644 index 00000000000..2d4415ba6a3 --- /dev/null +++ b/src/vnet/session/transport.h @@ -0,0 +1,250 @@ +/* + * Copyright (c) 2016 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 VNET_VNET_URI_TRANSPORT_H_ +#define VNET_VNET_URI_TRANSPORT_H_ + +#include +#include +#include +#include + +/* + * Protocol independent transport properties associated to a session + */ +typedef struct _transport_connection +{ + ip46_address_t rmt_ip; /**< Remote IP */ + ip46_address_t lcl_ip; /**< Local IP */ + u16 lcl_port; /**< Local port */ + u16 rmt_port; /**< Remote port */ + u8 proto; /**< Transport protocol id */ + + u32 s_index; /**< Parent session index */ + u32 c_index; /**< Connection index in transport pool */ + u8 is_ip4; /**< Flag if IP4 connection */ + u32 thread_index; /**< Worker-thread index */ + + /** Macros for 'derived classes' where base is named "connection" */ +#define c_lcl_ip connection.lcl_ip +#define c_rmt_ip connection.rmt_ip +#define c_lcl_ip4 connection.lcl_ip.ip4 +#define c_rmt_ip4 connection.rmt_ip.ip4 +#define c_lcl_ip6 connection.lcl_ip.ip6 +#define c_rmt_ip6 connection.rmt_ip.ip6 +#define c_lcl_port connection.lcl_port +#define c_rmt_port connection.rmt_port +#define c_proto connection.proto +#define c_state connection.state +#define c_s_index connection.s_index +#define c_c_index connection.c_index +#define c_is_ip4 connection.is_ip4 +#define c_thread_index connection.thread_index +} transport_connection_t; + +/* + * Transport protocol virtual function table + */ +typedef struct _transport_proto_vft +{ + /* + * Setup + */ + u32 (*bind) (vlib_main_t *, u32, ip46_address_t *, u16); + u32 (*unbind) (vlib_main_t *, u32); + int (*open) (ip46_address_t * addr, u16 port_host_byte_order); + void (*close) (u32 conn_index, u32 thread_index); + void (*cleanup) (u32 conn_index, u32 thread_index); + + /* + * Transmission + */ + u32 (*push_header) (transport_connection_t * tconn, vlib_buffer_t * b); + u16 (*send_mss) (transport_connection_t * tc); + u32 (*send_space) (transport_connection_t * tc); + u32 (*rx_fifo_offset) (transport_connection_t * tc); + + /* + * Connection retrieval + */ + transport_connection_t *(*get_connection) (u32 conn_idx, u32 thread_idx); + transport_connection_t *(*get_listener) (u32 conn_index); + transport_connection_t *(*get_half_open) (u32 conn_index); + + /* + * Format + */ + u8 *(*format_connection) (u8 * s, va_list * args); + u8 *(*format_listener) (u8 * s, va_list * args); + u8 *(*format_half_open) (u8 * s, va_list * args); + +} transport_proto_vft_t; + +/* 16 octets */ +typedef CLIB_PACKED (struct + { + union + { + struct + { + ip4_address_t src; ip4_address_t dst; + u16 src_port; + u16 dst_port; + /* align by making this 4 octets even though its a 1-bit field + * NOTE: avoid key overlap with other transports that use 5 tuples for + * session identification. + */ + u32 proto; + }; + u64 as_u64[2]; + }; + }) v4_connection_key_t; + +typedef CLIB_PACKED (struct + { + union + { + struct + { + /* 48 octets */ + ip6_address_t src; ip6_address_t dst; + u16 src_port; + u16 dst_port; u32 proto; u8 unused_for_now[8]; + }; u64 as_u64[6]; + }; + }) v6_connection_key_t; + +typedef clib_bihash_kv_16_8_t session_kv4_t; +typedef clib_bihash_kv_48_8_t session_kv6_t; + +always_inline void +make_v4_ss_kv (session_kv4_t * kv, ip4_address_t * lcl, ip4_address_t * rmt, + u16 lcl_port, u16 rmt_port, u8 proto) +{ + v4_connection_key_t key; + memset (&key, 0, sizeof (v4_connection_key_t)); + + key.src.as_u32 = lcl->as_u32; + key.dst.as_u32 = rmt->as_u32; + key.src_port = lcl_port; + key.dst_port = rmt_port; + key.proto = proto; + + kv->key[0] = key.as_u64[0]; + kv->key[1] = key.as_u64[1]; + kv->value = ~0ULL; +} + +always_inline void +make_v4_listener_kv (session_kv4_t * kv, ip4_address_t * lcl, u16 lcl_port, + u8 proto) +{ + v4_connection_key_t key; + memset (&key, 0, sizeof (v4_connection_key_t)); + + key.src.as_u32 = lcl->as_u32; + key.dst.as_u32 = 0; + key.src_port = lcl_port; + key.dst_port = 0; + key.proto = proto; + + kv->key[0] = key.as_u64[0]; + kv->key[1] = key.as_u64[1]; + kv->value = ~0ULL; +} + +always_inline void +make_v4_ss_kv_from_tc (session_kv4_t * kv, transport_connection_t * t) +{ + return make_v4_ss_kv (kv, &t->lcl_ip.ip4, &t->rmt_ip.ip4, t->lcl_port, + t->rmt_port, t->proto); +} + +always_inline void +make_v6_ss_kv (session_kv6_t * kv, ip6_address_t * lcl, ip6_address_t * rmt, + u16 lcl_port, u16 rmt_port, u8 proto) +{ + v6_connection_key_t key; + memset (&key, 0, sizeof (v6_connection_key_t)); + + key.src.as_u64[0] = lcl->as_u64[0]; + key.src.as_u64[1] = lcl->as_u64[1]; + key.dst.as_u64[0] = rmt->as_u64[0]; + key.dst.as_u64[1] = rmt->as_u64[1]; + key.src_port = lcl_port; + key.dst_port = rmt_port; + key.proto = proto; + + kv->key[0] = key.as_u64[0]; + kv->key[1] = key.as_u64[1]; + kv->value = ~0ULL; +} + +always_inline void +make_v6_listener_kv (session_kv6_t * kv, ip6_address_t * lcl, u16 lcl_port, + u8 proto) +{ + v6_connection_key_t key; + memset (&key, 0, sizeof (v6_connection_key_t)); + + key.src.as_u64[0] = lcl->as_u64[0]; + key.src.as_u64[1] = lcl->as_u64[1]; + key.dst.as_u64[0] = 0; + key.dst.as_u64[1] = 0; + key.src_port = lcl_port; + key.dst_port = 0; + key.proto = proto; + + kv->key[0] = key.as_u64[0]; + kv->key[1] = key.as_u64[1]; + kv->value = ~0ULL; +} + +always_inline void +make_v6_ss_kv_from_tc (session_kv6_t * kv, transport_connection_t * t) +{ + make_v6_ss_kv (kv, &t->lcl_ip.ip6, &t->rmt_ip.ip6, t->lcl_port, + t->rmt_port, t->proto); +} + +typedef struct _transport_endpoint +{ + ip46_address_t ip; + u16 port; + u8 is_ip4; + u32 vrf; +} transport_endpoint_t; + +typedef clib_bihash_24_8_t transport_endpoint_table_t; + +#define TRANSPORT_ENDPOINT_INVALID_INDEX ((u32)~0) + +u32 +transport_endpoint_lookup (transport_endpoint_table_t * ht, + ip46_address_t * ip, u16 port); +void transport_endpoint_table_add (transport_endpoint_table_t * ht, + transport_endpoint_t * te, u32 value); +void transport_endpoint_table_del (transport_endpoint_table_t * ht, + transport_endpoint_t * te); + +#endif /* VNET_VNET_URI_TRANSPORT_H_ */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ -- cgit 1.2.3-korg