diff options
Diffstat (limited to 'src/plugins/nsim')
| -rw-r--r-- | src/plugins/nsim/CMakeLists.txt | 33 | ||||
| -rw-r--r-- | src/plugins/nsim/node.c | 187 | ||||
| -rw-r--r-- | src/plugins/nsim/nsim.api | 50 | ||||
| -rw-r--r-- | src/plugins/nsim/nsim.c | 599 | ||||
| -rw-r--r-- | src/plugins/nsim/nsim.h | 90 | ||||
| -rw-r--r-- | src/plugins/nsim/nsim_all_api_h.h | 19 | ||||
| -rw-r--r-- | src/plugins/nsim/nsim_input.c | 228 | ||||
| -rw-r--r-- | src/plugins/nsim/nsim_msg_enum.h | 31 | ||||
| -rw-r--r-- | src/plugins/nsim/nsim_test.c | 285 |
9 files changed, 1522 insertions, 0 deletions
diff --git a/src/plugins/nsim/CMakeLists.txt b/src/plugins/nsim/CMakeLists.txt new file mode 100644 index 00000000000..6b261f8d266 --- /dev/null +++ b/src/plugins/nsim/CMakeLists.txt @@ -0,0 +1,33 @@ +# Copyright (c) 2018 Cisco and/or its affiliates. +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at: +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +add_vpp_plugin(nsim + SOURCES + nsim.c + node.c + nsim_input.c + + MULTIARCH_SOURCES + nsim_input.c + node.c + + API_FILES + nsim.api + + INSTALL_HEADERS + nsim_all_api_h.h + nsim_msg_enum.h + + API_TEST_SOURCES + nsim_test.c +) diff --git a/src/plugins/nsim/node.c b/src/plugins/nsim/node.c new file mode 100644 index 00000000000..69dc9be919b --- /dev/null +++ b/src/plugins/nsim/node.c @@ -0,0 +1,187 @@ +/* + * node.c - skeleton vpp engine plug-in dual-loop node skeleton + * + * Copyright (c) <current-year> <your-organization> + * 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 <vlib/vlib.h> +#include <vnet/vnet.h> +#include <vnet/pg/pg.h> +#include <vppinfra/error.h> +#include <nsim/nsim.h> + +typedef struct +{ + f64 expires; + u32 tx_sw_if_index; + int is_drop; +} nsim_trace_t; + +#ifndef CLIB_MARCH_VARIANT + +/* packet trace format function */ +static u8 * +format_nsim_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 *); + nsim_trace_t *t = va_arg (*args, nsim_trace_t *); + + if (t->is_drop) + s = format (s, "NSIM: ring drop"); + else + s = format (s, "NSIM: tx time %.6f sw_if_index %d", + t->expires, t->tx_sw_if_index); + + return s; +} +#endif /* CLIB_MARCH_VARIANT */ + +vlib_node_registration_t nsim_node; + +#define foreach_nsim_error \ +_(BUFFERED, "Packets buffered") \ +_(DROPPED, "Packets dropped due to lack of space") + +typedef enum +{ +#define _(sym,str) NSIM_ERROR_##sym, + foreach_nsim_error +#undef _ + NSIM_N_ERROR, +} nsim_error_t; + +#ifndef CLIB_MARCH_VARIANT +static char *nsim_error_strings[] = { +#define _(sym,string) string, + foreach_nsim_error +#undef _ +}; +#endif /* CLIB_MARCH_VARIANT */ + +typedef enum +{ + NSIM_NEXT_DROP, + NSIM_N_NEXT, +} nsim_next_t; + +always_inline uword +nsim_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame, int is_trace) +{ + nsim_main_t *nsm = &nsim_main; + u32 n_left_from, *from; + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b; + u16 nexts[VLIB_FRAME_SIZE], *next; + u32 my_thread_index = vm->thread_index; + nsim_wheel_t *wp = nsm->wheel_by_thread[my_thread_index]; + f64 now = vlib_time_now (vm); + f64 expires = now + nsm->delay; + int is_drop0; + u32 no_error = node->errors[NSIM_ERROR_BUFFERED]; + u32 no_buffer_error = node->errors[NSIM_ERROR_DROPPED]; + nsim_wheel_entry_t *ep = 0; + + ASSERT (wp); + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + + vlib_get_buffers (vm, from, bufs, n_left_from); + b = bufs; + next = nexts; + + /* There is no point in trying to do more than 1 pkt here */ + while (n_left_from > 0) + { + b[0]->error = no_error; + next[0] = NSIM_NEXT_DROP; + is_drop0 = 0; + if (PREDICT_TRUE (wp->cursize < wp->wheel_size)) + { + ep = wp->entries + wp->tail; + wp->tail++; + if (wp->tail == wp->wheel_size) + wp->tail = 0; + wp->cursize++; + + ep->tx_time = expires; + ep->tx_sw_if_index = + (vnet_buffer (b[0])->sw_if_index[VLIB_RX] == nsm->sw_if_index0) + ? nsm->sw_if_index1 : nsm->sw_if_index0; + ep->current_length = vlib_buffer_length_in_chain (vm, b[0]); + ASSERT (ep->current_length <= WHEEL_ENTRY_DATA_SIZE); + clib_memcpy (ep->data, vlib_buffer_get_current (b[0]), + ep->current_length); + } + else /* out of wheel space, drop pkt */ + b[0]->error = no_buffer_error; + + if (is_trace) + { + if (b[0]->flags & VLIB_BUFFER_IS_TRACED) + { + nsim_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t)); + t->expires = expires; + t->is_drop = is_drop0; + if (is_drop0 == 0) + t->tx_sw_if_index = ep->tx_sw_if_index; + } + } + + b += 1; + next += 1; + n_left_from -= 1; + } + vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors); + return frame->n_vectors; +} + +VLIB_NODE_FN (nsim_node) (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE)) + return nsim_inline (vm, node, frame, 1 /* is_trace */ ); + else + return nsim_inline (vm, node, frame, 0 /* is_trace */ ); +} + +/* *INDENT-OFF* */ +#ifndef CLIB_MARCH_VARIANT +VLIB_REGISTER_NODE (nsim_node) = +{ + .name = "nsim", + .vector_size = sizeof (u32), + .format_trace = format_nsim_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(nsim_error_strings), + .error_strings = nsim_error_strings, + + .n_next_nodes = NSIM_N_NEXT, + + /* edit / add dispositions here */ + .next_nodes = { + [NSIM_NEXT_DROP] = "error-drop", + }, +}; +#endif /* CLIB_MARCH_VARIANT */ +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/plugins/nsim/nsim.api b/src/plugins/nsim/nsim.api new file mode 100644 index 00000000000..89174268aee --- /dev/null +++ b/src/plugins/nsim/nsim.api @@ -0,0 +1,50 @@ +/** + * @file nsim.api + * @brief VPP control-plane API messages for the network delay simulator + */ + +option version = "1.0.0"; + +/** \brief enable / disable the network delay simulation cross-connect + @param client_index - opaque cookie to identify the sender + @param context - sender context, to match reply w/ request + @param enable_disable - enable or disable the feature + @param sw_if_index0 - one interface to cross-connect + @param sw_if_index1 - the other interface to cross-connect +*/ +autoreply define nsim_enable_disable +{ + /* Client identifier, set from api_main.my_client_index */ + u32 client_index; + + /* Arbitrary context, so client can match reply to request */ + u32 context; + + /* Enable / disable the feature on the interfaces */ + u8 enable_disable; + + /* Interface handles */ + u32 sw_if_index0; + u32 sw_if_index1; +}; + +/** \brief configure the network delay simulation cross-connect + @param client_index - opaque cookie to identify the sender + @param context - sender context, to match reply w/ request + @param delay_in_usec - microseconds of link delay to simulate + @param average_packet_size - average packet size for wheel sizing + @param bandwidth_in_bits_per_second - bps for wheel sizing +*/ +autoreply define nsim_configure +{ + /* Client identifier, set from api_main.my_client_index */ + u32 client_index; + + /* Arbitrary context, so client can match reply to request */ + u32 context; + + /* Configuration parameters */ + u32 delay_in_usec; + u32 average_packet_size; + u64 bandwidth_in_bits_per_second; +}; diff --git a/src/plugins/nsim/nsim.c b/src/plugins/nsim/nsim.c new file mode 100644 index 00000000000..34a5039ad70 --- /dev/null +++ b/src/plugins/nsim/nsim.c @@ -0,0 +1,599 @@ +/* + * nsim.c - skeleton vpp engine plug-in + * + * Copyright (c) <current-year> <your-organization> + * 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 Network Delay Simulator + */ +/*? %%clicmd:group_label Network Delay Simulator %% ?*/ + +#include <vnet/vnet.h> +#include <vnet/plugin/plugin.h> +#include <nsim/nsim.h> + +#include <vlibapi/api.h> +#include <vlibmemory/api.h> +#include <vpp/app/version.h> + +/* define message IDs */ +#include <nsim/nsim_msg_enum.h> + +/* define message structures */ +#define vl_typedefs +#include <nsim/nsim_all_api_h.h> +#undef vl_typedefs + +/* define generated endian-swappers */ +#define vl_endianfun +#include <nsim/nsim_all_api_h.h> +#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 <nsim/nsim_all_api_h.h> +#undef vl_printfun + +/* Get the API version number */ +#define vl_api_version(n,v) static u32 api_version=(v); +#include <nsim/nsim_all_api_h.h> +#undef vl_api_version + +#define REPLY_MSG_ID_BASE nsm->msg_id_base +#include <vlibapi/api_helper_macros.h> + +nsim_main_t nsim_main; + +/* List of message types that this plugin understands */ + +#define foreach_nsim_plugin_api_msg \ +_(NSIM_ENABLE_DISABLE, nsim_enable_disable) \ +_(NSIM_CONFIGURE, nsim_configure) + +/* Action function shared between message handler and debug CLI */ + +int +nsim_enable_disable (nsim_main_t * nsm, u32 sw_if_index0, + u32 sw_if_index1, int enable_disable) +{ + vnet_sw_interface_t *sw; + vnet_hw_interface_t *hw; + int rv = 0; + + if (nsm->is_configured == 0) + return VNET_API_ERROR_CANNOT_ENABLE_DISABLE_FEATURE; + + /* Utterly wrong? */ + if (pool_is_free_index (nsm->vnet_main->interface_main.sw_interfaces, + sw_if_index0)) + return VNET_API_ERROR_INVALID_SW_IF_INDEX; + + if (pool_is_free_index (nsm->vnet_main->interface_main.sw_interfaces, + sw_if_index1)) + return VNET_API_ERROR_INVALID_SW_IF_INDEX; + + /* Not a physical port? */ + sw = vnet_get_sw_interface (nsm->vnet_main, sw_if_index0); + if (sw->type != VNET_SW_INTERFACE_TYPE_HARDWARE) + return VNET_API_ERROR_INVALID_SW_IF_INDEX; + + sw = vnet_get_sw_interface (nsm->vnet_main, sw_if_index1); + if (sw->type != VNET_SW_INTERFACE_TYPE_HARDWARE) + return VNET_API_ERROR_INVALID_SW_IF_INDEX; + + /* Add graph arcs for the input / wheel scraper node */ + hw = vnet_get_hw_interface (nsm->vnet_main, sw_if_index0); + nsm->output_next_index0 = + vlib_node_add_next (nsm->vlib_main, + nsim_input_node.index, hw->output_node_index); + + hw = vnet_get_hw_interface (nsm->vnet_main, sw_if_index1); + nsm->output_next_index1 = + vlib_node_add_next (nsm->vlib_main, + nsim_input_node.index, hw->output_node_index); + + nsm->sw_if_index0 = sw_if_index0; + nsm->sw_if_index1 = sw_if_index1; + + vnet_feature_enable_disable ("device-input", "nsim", + sw_if_index0, enable_disable, 0, 0); + vnet_feature_enable_disable ("device-input", "nsim", + sw_if_index1, enable_disable, 0, 0); + + return rv; +} + +static int +nsim_configure (nsim_main_t * nsm, f64 bandwidth, f64 delay, f64 packet_size) +{ + u64 total_buffer_size_in_bytes, per_worker_buffer_size; + u64 wheel_slots_per_worker; + int i; + int num_workers = vlib_num_workers (); + u32 pagesize = getpagesize (); + vlib_main_t *vm = nsm->vlib_main; + + if (bandwidth == 0.0) + return VNET_API_ERROR_INVALID_VALUE; + + if (delay == 0.0) + return VNET_API_ERROR_INVALID_VALUE_2; + + if (packet_size < 64.0 || packet_size > (f64) WHEEL_ENTRY_DATA_SIZE) + return VNET_API_ERROR_INVALID_VALUE_3; + + /* Toss the old wheel(s)... */ + if (nsm->is_configured) + { + for (i = 0; i < vec_len (nsm->wheel_by_thread); i++) + { + nsim_wheel_t *wp = nsm->wheel_by_thread[i]; + munmap (wp, nsm->mmap_size); + nsm->wheel_by_thread[i] = 0; + } + } + + nsm->delay = delay; + + /* delay in seconds, bandwidth in bits/sec */ + total_buffer_size_in_bytes = (u32) ((delay * bandwidth) / 8.0) + 0.5; + + /* + * Work out how much buffering each worker needs, assuming decent + * RSS behavior. + */ + if (num_workers) + per_worker_buffer_size = total_buffer_size_in_bytes / num_workers; + else + per_worker_buffer_size = total_buffer_size_in_bytes; + + wheel_slots_per_worker = per_worker_buffer_size / packet_size; + wheel_slots_per_worker++; + + /* Save these for the show command */ + nsm->bandwidth = bandwidth; + nsm->packet_size = packet_size; + + vec_validate (nsm->wheel_by_thread, num_workers); + vec_validate (nsm->buffer_indices_by_thread, num_workers); + + /* Initialize the output scheduler wheels */ + for (i = num_workers ? 1 : 0; i < num_workers + 1; i++) + { + nsim_wheel_t *wp; + + nsm->mmap_size = sizeof (nsim_wheel_t) + + wheel_slots_per_worker * sizeof (nsim_wheel_entry_t); + + nsm->mmap_size += pagesize - 1; + nsm->mmap_size &= ~(pagesize - 1); + + wp = clib_mem_vm_alloc (nsm->mmap_size); + ASSERT (wp != 0); + wp->wheel_size = wheel_slots_per_worker; + wp->cursize = 0; + wp->head = 0; + wp->tail = 0; + wp->entries = (void *) (wp + 1); + nsm->wheel_by_thread[i] = wp; + vec_validate (nsm->buffer_indices_by_thread[i], VLIB_FRAME_SIZE - 1); + _vec_len (nsm->buffer_indices_by_thread[i]) = 0; + } + + vlib_worker_thread_barrier_sync (vm); + + /* turn on the ring scrapers */ + for (i = num_workers ? 1 : 0; i < num_workers + 1; i++) + { + vlib_main_t *this_vm = vlib_mains[i]; + + vlib_node_set_state (this_vm, nsim_input_node.index, + VLIB_NODE_STATE_POLLING); + } + + vlib_worker_thread_barrier_release (vm); + + nsm->is_configured = 1; + return 0; +} + +/* + * enable or disable the cross-connect + */ +static clib_error_t * +nsim_enable_disable_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + nsim_main_t *nsm = &nsim_main; + u32 sw_if_index0 = ~0; + u32 sw_if_index1 = ~0; + int enable_disable = 1; + u32 tmp; + int rv; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "disable")) + enable_disable = 0; + else if (unformat (input, "%U", unformat_vnet_sw_interface, + nsm->vnet_main, &tmp)) + { + if (sw_if_index0 == ~0) + sw_if_index0 = tmp; + else + sw_if_index1 = tmp; + } + else + break; + } + + if (sw_if_index0 == ~0 || sw_if_index1 == ~0) + return clib_error_return (0, "Please specify two interfaces..."); + + rv = nsim_enable_disable (nsm, sw_if_index0, sw_if_index1, enable_disable); + + switch (rv) + { + case 0: + break; + + case VNET_API_ERROR_CANNOT_ENABLE_DISABLE_FEATURE: + return clib_error_return (0, "Not configured, please 'set nsim' first"); + + case VNET_API_ERROR_INVALID_SW_IF_INDEX: + return clib_error_return + (0, "Invalid interface, only works on physical ports"); + break; + + case VNET_API_ERROR_UNIMPLEMENTED: + return clib_error_return (0, + "Device driver doesn't support redirection"); + break; + + default: + return clib_error_return (0, "nsim_enable_disable returned %d", rv); + } + return 0; +} + +/*? + * Enable or disable network simulation cross-connect on two interfaces + * The network simulator must have already been configured, see + * the "nsim_configure" command. + * + * Place the interfaces into a bridge group, to ensure that + * interfaces are in promiscuous mode. + * + * @cliexpar + * To enable or disable network simulation cross-connect + * @clistart + * nsim enable-disable TenGigabitEthernet2/0/0 TenGigabitEthernet2/0 + * nsim enable-disable TenGigabitEthernet2/0/0 TenGigabitEthernet2/0 disable + * @cliend + * @cliexcmd{nsim enable-disable <intfc> <intfc> [disable]} +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (nsim_enable_disable_command, static) = +{ + .path = "nsim enable-disable", + .short_help = + "nsim enable-disable <interface-name-1> <interface-name-2> [disable]", + .function = nsim_enable_disable_command_fn, +}; +/* *INDENT-ON* */ + +/* API message handler */ +static void vl_api_nsim_enable_disable_t_handler + (vl_api_nsim_enable_disable_t * mp) +{ + vl_api_nsim_enable_disable_reply_t *rmp; + nsim_main_t *nsm = &nsim_main; + int rv; + + rv = nsim_enable_disable (nsm, ntohl (mp->sw_if_index0), + ntohl (mp->sw_if_index1), + (int) (mp->enable_disable)); + + REPLY_MACRO (VL_API_NSIM_ENABLE_DISABLE_REPLY); +} + +/* API message handler */ +static void +vl_api_nsim_configure_t_handler (vl_api_nsim_configure_t * mp) +{ + vl_api_nsim_configure_reply_t *rmp; + nsim_main_t *nsm = &nsim_main; + f64 delay, bandwidth, packet_size; + int rv; + + delay = ((f64) (ntohl (mp->delay_in_usec))) * 1e-6; + bandwidth = (f64) (clib_net_to_host_u64 (mp->bandwidth_in_bits_per_second)); + packet_size = (f64) (ntohl (mp->average_packet_size)); + + rv = nsim_configure (nsm, bandwidth, delay, packet_size); + + REPLY_MACRO (VL_API_NSIM_CONFIGURE_REPLY); +} + + +/* Set up the API message handling tables */ +static clib_error_t * +nsim_plugin_api_hookup (vlib_main_t * vm) +{ + nsim_main_t *nsm = &nsim_main; +#define _(N,n) \ + vl_msg_api_set_handlers((VL_API_##N + nsm->msg_id_base), \ + #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_nsim_plugin_api_msg; +#undef _ + + return 0; +} + +#define vl_msg_name_crc_list +#include <nsim/nsim_all_api_h.h> +#undef vl_msg_name_crc_list + +static void +setup_message_id_table (nsim_main_t * nsm, api_main_t * am) +{ +#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n #crc, id + nsm->msg_id_base); + foreach_vl_msg_name_crc_nsim; +#undef _ +} + +static clib_error_t * +nsim_init (vlib_main_t * vm) +{ + nsim_main_t *nsm = &nsim_main; + clib_error_t *error = 0; + u8 *name; + + nsm->vlib_main = vm; + nsm->vnet_main = vnet_get_main (); + + name = format (0, "nsim_%08x%c", api_version, 0); + + /* Ask for a correctly-sized block of API message decode slots */ + nsm->msg_id_base = vl_msg_api_get_msg_ids + ((char *) name, VL_MSG_FIRST_AVAILABLE); + + error = nsim_plugin_api_hookup (vm); + + /* Add our API messages to the global name_crc hash table */ + setup_message_id_table (nsm, &api_main); + + vec_free (name); + + return error; +} + +VLIB_INIT_FUNCTION (nsim_init); + +/* *INDENT-OFF* */ +VNET_FEATURE_INIT (nsim, static) = +{ + .arc_name = "device-input", + .node_name = "nsim", + .runs_before = VNET_FEATURES ("ethernet-input"), +}; +/* *INDENT-ON */ + +/* *INDENT-OFF* */ +VLIB_PLUGIN_REGISTER () = +{ + .version = VPP_BUILD_VER, + .description = "network delay simulator plugin", +}; +/* *INDENT-ON* */ + +static uword +unformat_delay (unformat_input_t * input, va_list * args) +{ + f64 *result = va_arg (*args, f64 *); + f64 tmp; + + if (unformat (input, "%f us", &tmp)) + *result = tmp * 1e-6; + else if (unformat (input, "%f ms", &tmp)) + *result = tmp * 1e-3; + else if (unformat (input, "%f sec", &tmp)) + *result = tmp; + else + return 0; + + return 1; +} + +static uword +unformat_bandwidth (unformat_input_t * input, va_list * args) +{ + f64 *result = va_arg (*args, f64 *); + f64 tmp; + + if (unformat (input, "%f gbit", &tmp)) + *result = tmp * 1e9; + else if (unformat (input, "%f gbyte", &tmp)) + *result = tmp * 8e9; + else + return 0; + return 1; +} + +static clib_error_t * +set_nsim_command_fn (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd) +{ + nsim_main_t *nsm = &nsim_main; + f64 delay, bandwidth; + f64 packet_size = 1500.0; + u32 num_workers = vlib_num_workers (); + int rv; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "delay %U", unformat_delay, &delay)) + ; + else if (unformat (input, "bandwidth %U", unformat_bandwidth, + &bandwidth)) + ; + else if (unformat (input, "packet-size %f", &packet_size)) + ; + else + break; + } + + rv = nsim_configure (nsm, bandwidth, delay, packet_size); + + switch (rv) + { + case VNET_API_ERROR_INVALID_VALUE: + return clib_error_return (0, "invalid bandwidth %.2f", bandwidth); + + case VNET_API_ERROR_INVALID_VALUE_2: + return clib_error_return (0, "invalid delay %.2f", delay); + + case VNET_API_ERROR_INVALID_VALUE_3: + return clib_error_return (0, "invalid packet size %.2f", packet_size); + + default: + return clib_error_return (0, "error %d", rv); + + case 0: + break; + } + + vlib_cli_output (vm, "Configured link delay %.2f ms, %.2f ms round-trip", + nsm->delay * 1e3, 2.0 * nsm->delay * 1e3); + + if (num_workers) + vlib_cli_output (vm, "Sim uses %llu bytes per thread, %llu bytes total", + nsm->mmap_size, nsm->mmap_size * num_workers); + else + vlib_cli_output (vm, "Sim uses %llu bytes total", nsm->mmap_size); + + return 0; +} + +/*? + * Configure the network simulation cross-connect + * Once the simulator is configured, use the "nsim enable-disable" command + * to set up a cross-connect with the supplied delay characteristics. + * + * The cross connect configuration may be changed without restarting vpp + * but it is good practice to shut down the interfaces. + * + * @cliexpar + * To configure the network delay simulator: + * @clistart + * set nsim delay 10.0 ms bandwidth 5.5 gbit packet-size 128 + * + * @cliend + * @cliexcmd{set nsim delay <nn> bandwidth <bb> packet-size <nn>} +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (set_nsim_command, static) = +{ + .path = "set nsim", + .short_help = "set nsim delay <time> bandwidth <bps> packet-size <nbytes>", + .function = set_nsim_command_fn, +}; +/* *INDENT-ON*/ + + +static clib_error_t * +show_nsim_command_fn (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd) +{ + nsim_main_t *nsm = &nsim_main; + u32 num_workers = vlib_num_workers (); + int verbose = 0; + + if (nsm->is_configured == 0) + return clib_error_return (0, "Network simulator not configured"); + + if (nsm->sw_if_index0 == 0) + return clib_error_return (0, "Network simulator not enabled"); + + if (unformat (input, "verbose")) + verbose = 1; + + vlib_cli_output (vm, "Network simulator cross-connects %U and %U", + format_vnet_sw_if_index_name, + nsm->vnet_main, nsm->sw_if_index0, + format_vnet_sw_if_index_name, + nsm->vnet_main, nsm->sw_if_index1); + + vlib_cli_output (vm, + "...inserting link delay of %.2f ms, %.2f ms round-trip", + nsm->delay * 1e3, 2.0 * nsm->delay * 1e3); + + if (verbose) + { + + vlib_cli_output (vm, " Configured bandwidth: %.2f gbit/sec", + nsm->bandwidth / 1e9); + vlib_cli_output (vm, " Configured packet size: %f", nsm->packet_size); + if (num_workers) + vlib_cli_output + (vm, " Sim uses %llu bytes per thread, %llu bytes total", + nsm->mmap_size, nsm->mmap_size * num_workers); + else + vlib_cli_output (vm, " Sim uses %llu bytes total", nsm->mmap_size); + } + + return 0; +} + +/*? + * Display state info for the network delay simulator. + * + * @cliexpar + * To display the state of the network simulator + * @clistart + * show nsim verbose + * Network simulator cross-connects TenGigabitEthernet2/0/0 and TenGigabitEthernet2/0/1 + * ...inserting link delay of 10.00 ms, 20.00 ms round-trip + * Configured bandwidth: 10.10 gbit/sec + * Configured packet size: 128 + * Sim uses 157814784 bytes total + * @cliend + * @cliexcmd{show nsim} +?*/ + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (show_nsim_command, static) = +{ + .path = "show nsim", + .short_help = "Display network delay simulator configuration", + .function = show_nsim_command_fn, +}; +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/plugins/nsim/nsim.h b/src/plugins/nsim/nsim.h new file mode 100644 index 00000000000..d0b5ed32fee --- /dev/null +++ b/src/plugins/nsim/nsim.h @@ -0,0 +1,90 @@ + +/* + * nsim.h - skeleton vpp engine plug-in header file + * + * Copyright (c) <current-year> <your-organization> + * 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_nsim_h__ +#define __included_nsim_h__ + +#include <vnet/vnet.h> +#include <vnet/ip/ip.h> +#include <vnet/ethernet/ethernet.h> + +#include <vppinfra/hash.h> +#include <vppinfra/error.h> + +#define WHEEL_ENTRY_DATA_SIZE 1536 /* an even multiple of 64, pls */ + +typedef struct +{ + f64 tx_time; + u32 tx_sw_if_index; + u32 current_length; + CLIB_CACHE_LINE_ALIGN_MARK (pad); + u8 data[WHEEL_ENTRY_DATA_SIZE]; +} nsim_wheel_entry_t; + +typedef struct +{ + u32 wheel_size; + u32 cursize; + u32 head; + u32 tail; + nsim_wheel_entry_t *entries; + CLIB_CACHE_LINE_ALIGN_MARK (pad); +} nsim_wheel_t; + +typedef struct +{ + /* API message ID base */ + u16 msg_id_base; + + /* Two interfaces, cross-connected with delay */ + u32 sw_if_index0, sw_if_index1; + u32 output_next_index0, output_next_index1; + + /* Per-thread buffer / scheduler wheels */ + nsim_wheel_t **wheel_by_thread; + u32 **buffer_indices_by_thread; + + /* Config parameters */ + f64 delay; + f64 bandwidth; + f64 packet_size; + + u64 mmap_size; + + /* Wheels are configured */ + int is_configured; + + /* convenience */ + vlib_main_t *vlib_main; + vnet_main_t *vnet_main; +} nsim_main_t; + +extern nsim_main_t nsim_main; + +extern vlib_node_registration_t nsim_node; +extern vlib_node_registration_t nsim_input_node; + +#endif /* __included_nsim_h__ */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/plugins/nsim/nsim_all_api_h.h b/src/plugins/nsim/nsim_all_api_h.h new file mode 100644 index 00000000000..ca54bba2e6c --- /dev/null +++ b/src/plugins/nsim/nsim_all_api_h.h @@ -0,0 +1,19 @@ + +/* + * nsim_all_api_h.h - skeleton vpp engine plug-in api #include file + * + * Copyright (c) <current-year> <your-organization> + * 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 the generated file, see BUILT_SOURCES in Makefile.am */ +#include <nsim/nsim.api.h> diff --git a/src/plugins/nsim/nsim_input.c b/src/plugins/nsim/nsim_input.c new file mode 100644 index 00000000000..50dbcb97d6b --- /dev/null +++ b/src/plugins/nsim/nsim_input.c @@ -0,0 +1,228 @@ +/* + * nsim.c - skeleton vpp engine plug-in + * + * Copyright (c) <current-year> <your-organization> + * 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 <vlib/vlib.h> +#include <vnet/vnet.h> +#include <vnet/pg/pg.h> +#include <vppinfra/error.h> +#include <nsim/nsim.h> + +typedef struct +{ + f64 expired; + u32 tx_sw_if_index; +} nsim_tx_trace_t; + +#ifndef CLIB_MARCH_VARIANT +/* packet trace format function */ +static u8 * +format_nsim_tx_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 *); + nsim_tx_trace_t *t = va_arg (*args, nsim_tx_trace_t *); + + s = format (s, "NSIM: tx at %.6f sw_if_index %d", + t->expired, t->tx_sw_if_index); + return s; +} +#endif /* CLIB_MARCH_VARIANT */ + +vlib_node_registration_t nsim_node; + +#define foreach_nsim_tx_error \ +_(TX, "Packets transmitted") \ +_(DROPPED, "No buffer drops") + +typedef enum +{ +#define _(sym,str) NSIM_TX_ERROR_##sym, + foreach_nsim_tx_error +#undef _ + NSIM_N_ERROR, +} nsim_tx_error_t; + +#ifndef CLIB_MARCH_VARIANT +static char *nsim_tx_error_strings[] = { +#define _(sym,string) string, + foreach_nsim_tx_error +#undef _ +}; +#endif /* CLIB_MARCH_VARIANT */ + +typedef enum +{ + NSIM_NEXT_DROP, + NSIM_N_NEXT, +} nsim_next_t; + +always_inline uword +nsim_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * f, int is_trace) +{ + nsim_main_t *nsm = &nsim_main; + u32 my_thread_index = vm->thread_index; + u32 *my_buffer_cache = nsm->buffer_indices_by_thread[my_thread_index]; + nsim_wheel_t *wp = nsm->wheel_by_thread[my_thread_index]; + f64 now = vlib_time_now (vm); + uword n_rx_packets = 0; + vlib_buffer_t *b0; + u32 bi0, next0; + vlib_buffer_free_list_t *fl; + u32 *to_next; + u32 next_index; + u32 n_left_to_next; + nsim_wheel_entry_t *ep; + + /* Nothing on the scheduler wheel? */ + if (wp->cursize == 0) + return 0; + + /* First entry on the wheel isn't expired? */ + ep = wp->entries + wp->head; + if (ep->tx_time > now) + return n_rx_packets; + + /* + * We use per-thread buffer caches, so we need the freelist to + * initialize them... + */ + fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX); + next_index = node->cached_next_index; + + while (wp->cursize) + { + /* Be aware: this is not the usual coding pattern */ + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + + while (n_left_to_next > 0 && ep->tx_time <= now) + { + /* Out of local buffer cache? */ + if (PREDICT_FALSE (_vec_len (my_buffer_cache) == 0)) + { + u32 n = + vlib_buffer_alloc (vm, my_buffer_cache, VLIB_FRAME_SIZE); + _vec_len (my_buffer_cache) = n; + + /* Ugh, drop the rest of the expired entries */ + if (n == 0) + { + u32 drops = 0; + while (ep->tx_time <= now && wp->cursize) + { + wp->head++; + if (wp->head == wp->wheel_size) + wp->head = 0; + ep = wp->entries + wp->head; + wp->cursize--; + drops++; + } + /* Count the drops */ + vlib_node_increment_counter (vm, node->node_index, + NSIM_TX_ERROR_DROPPED, drops); + /* Ship any pkts we already processed */ + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + return n_rx_packets + drops; + } + } + + /* Allocate a buffer */ + bi0 = my_buffer_cache[_vec_len (my_buffer_cache) - 1]; + _vec_len (my_buffer_cache) -= 1; + + to_next[0] = bi0; + to_next += 1; + n_left_to_next -= 1; + + b0 = vlib_get_buffer (vm, bi0); + /* Initialize the buffer */ + vlib_buffer_init_for_free_list (b0, fl); + + b0->current_data = 0; + b0->current_length = ep->current_length; + + /* Copy data from the ring */ + clib_memcpy (b0->data, ep->data, ep->current_length); + b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = ep->tx_sw_if_index; + vnet_buffer (b0)->sw_if_index[VLIB_RX] = + (ep->tx_sw_if_index == nsm->sw_if_index0) ? nsm->sw_if_index1 : + nsm->sw_if_index0; + next0 = (ep->tx_sw_if_index == nsm->sw_if_index0) ? + nsm->output_next_index0 : nsm->output_next_index1; + + /* verify speculative enqueue, maybe switch current next frame */ + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, + to_next, n_left_to_next, + bi0, next0); + /* Advance to the next ring entry */ + wp->head++; + if (wp->head == wp->wheel_size) + wp->head = 0; + wp->cursize--; + ep = wp->entries + wp->head; + n_rx_packets++; + + /* Out of ring entries? */ + if (PREDICT_FALSE (wp->cursize == 0)) + break; + } + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + + /* If the current entry hasn't expired, we're done */ + if (ep->tx_time > now) + break; + } + return n_rx_packets; +} + +VLIB_NODE_FN (nsim_input_node) (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE)) + return nsim_input_inline (vm, node, frame, 1 /* is_trace */ ); + else + return nsim_input_inline (vm, node, frame, 0 /* is_trace */ ); + +} + +/* *INDENT-OFF* */ +#ifndef CLIB_MARCH_VARIANT +VLIB_REGISTER_NODE (nsim_input_node) = +{ + .type = VLIB_NODE_TYPE_INPUT, + .name = "nsim-wheel", + + /* Will be enabled if/when the feature is configured */ + .state = VLIB_NODE_STATE_DISABLED, + + .format_trace = format_nsim_tx_trace, + + .n_errors = NSIM_N_ERROR, + .error_strings = nsim_tx_error_strings, +}; +#endif /* CLIB_MARCH_VARIANT */ +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/plugins/nsim/nsim_msg_enum.h b/src/plugins/nsim/nsim_msg_enum.h new file mode 100644 index 00000000000..116146f5d13 --- /dev/null +++ b/src/plugins/nsim/nsim_msg_enum.h @@ -0,0 +1,31 @@ + +/* + * nsim_msg_enum.h - skeleton vpp engine plug-in message enumeration + * + * Copyright (c) <current-year> <your-organization> + * 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_nsim_msg_enum_h +#define included_nsim_msg_enum_h + +#include <vppinfra/byte_order.h> + +#define vl_msg_id(n,h) n, +typedef enum { +#include <nsim/nsim_all_api_h.h> + /* We'll want to know how many messages IDs we need... */ + VL_MSG_FIRST_AVAILABLE, +} vl_msg_id_t; +#undef vl_msg_id + +#endif /* included_nsim_msg_enum_h */ diff --git a/src/plugins/nsim/nsim_test.c b/src/plugins/nsim/nsim_test.c new file mode 100644 index 00000000000..0e2a26af55b --- /dev/null +++ b/src/plugins/nsim/nsim_test.c @@ -0,0 +1,285 @@ +/* + * nsim.c - skeleton vpp-api-test plug-in + * + * Copyright (c) <current-year> <your-organization> + * 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 <vat/vat.h> +#include <vlibapi/api.h> +#include <vlibmemory/api.h> +#include <vppinfra/error.h> + +uword unformat_sw_if_index (unformat_input_t * input, va_list * args); + +/* Declare message IDs */ +#include <nsim/nsim_msg_enum.h> + +/* define message structures */ +#define vl_typedefs +#include <nsim/nsim_all_api_h.h> +#undef vl_typedefs + +/* declare message handlers for each api */ + +#define vl_endianfun /* define message structures */ +#include <nsim/nsim_all_api_h.h> +#undef vl_endianfun + +/* instantiate all the print functions we know about */ +#define vl_print(handle, ...) +#define vl_printfun +#include <nsim/nsim_all_api_h.h> +#undef vl_printfun + +/* Get the API version number. */ +#define vl_api_version(n,v) static u32 api_version=(v); +#include <nsim/nsim_all_api_h.h> +#undef vl_api_version + + +typedef struct +{ + /* API message ID base */ + u16 msg_id_base; + vat_main_t *vat_main; +} nsim_test_main_t; + +nsim_test_main_t nsim_test_main; + +#define __plugin_msg_base nsim_test_main.msg_id_base +#include <vlibapi/vat_helper_macros.h> + +#define foreach_standard_reply_retval_handler \ +_(nsim_enable_disable_reply) \ +_(nsim_configure_reply) + +#define _(n) \ + static void vl_api_##n##_t_handler \ + (vl_api_##n##_t * mp) \ + { \ + vat_main_t * vam = nsim_test_main.vat_main; \ + i32 retval = ntohl(mp->retval); \ + if (vam->async_mode) { \ + vam->async_errors += (retval < 0); \ + } else { \ + vam->retval = retval; \ + vam->result_ready = 1; \ + } \ + } +foreach_standard_reply_retval_handler; +#undef _ + +/* + * Table of message reply handlers, must include boilerplate handlers + * we just generated + */ +#define foreach_vpe_api_reply_msg \ +_(NSIM_ENABLE_DISABLE_REPLY, nsim_enable_disable_reply) \ +_(NSIM_CONFIGURE_REPLY, nsim_configure_reply) + +static int +api_nsim_enable_disable (vat_main_t * vam) +{ + unformat_input_t *i = vam->input; + int enable_disable = 1; + u32 sw_if_index0 = ~0; + u32 sw_if_index1 = ~0; + u32 tmp; + vl_api_nsim_enable_disable_t *mp; + int ret; + + /* Parse args required to build the message */ + while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT) + { + if (unformat (i, "%U", unformat_sw_if_index, vam, &tmp)) + { + if (sw_if_index0 == ~0) + sw_if_index0 = tmp; + else + sw_if_index1 = tmp; + } + else if (unformat (i, "sw_if_index %d", &tmp)) + { + if (sw_if_index0 == ~0) + sw_if_index0 = tmp; + else + sw_if_index1 = tmp; + } + else if (unformat (i, "disable")) + enable_disable = 0; + else + break; + } + + if (sw_if_index0 == ~0 || sw_if_index1 == ~0) + { + errmsg ("missing interface name / explicit sw_if_index number \n"); + return -99; + } + + /* Construct the API message */ + M (NSIM_ENABLE_DISABLE, mp); + mp->sw_if_index0 = ntohl (sw_if_index0); + mp->sw_if_index1 = ntohl (sw_if_index1); + mp->enable_disable = enable_disable; + + /* send it... */ + S (mp); + + /* Wait for a reply... */ + W (ret); + return ret; +} + +static uword +unformat_delay (unformat_input_t * input, va_list * args) +{ + f64 *result = va_arg (*args, f64 *); + f64 tmp; + + if (unformat (input, "%f us", &tmp)) + *result = tmp * 1e-6; + else if (unformat (input, "%f ms", &tmp)) + *result = tmp * 1e-3; + else if (unformat (input, "%f sec", &tmp)) + *result = tmp; + else + return 0; + + return 1; +} + +static uword +unformat_bandwidth (unformat_input_t * input, va_list * args) +{ + f64 *result = va_arg (*args, f64 *); + f64 tmp; + + if (unformat (input, "%f gbit", &tmp)) + *result = tmp * 1e9; + else if (unformat (input, "%f gbyte", &tmp)) + *result = tmp * 8e9; + else + return 0; + return 1; +} + +static int +api_nsim_configure (vat_main_t * vam) +{ + vl_api_nsim_configure_t *mp; + unformat_input_t *i = vam->input; + f64 delay = 0.0, bandwidth = 0.0; + f64 packet_size = 1500.0; + u32 num_workers = vlib_num_workers (); + int ret; + + while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT) + { + if (unformat (i, "delay %U", unformat_delay, &delay)) + ; + else if (unformat (i, "bandwidth %U", unformat_bandwidth, &bandwidth)) + ; + else if (unformat (i, "packet-size %f", &packet_size)) + ; + else + break; + } + + if (delay == 0.0 || bandwidth == 0.0) + { + errmsg ("must specify delay and bandwidth"); + return -99; + } + + /* Construct the API message */ + M (NSIM_CONFIGURE, mp); + mp->delay_in_usec = (u32) (delay * 1e6); + mp->delay_in_usec = ntohl (mp->delay_in_usec); + mp->average_packet_size = (u32) (packet_size); + mp->average_packet_size = ntohl (mp->average_packet_size); + mp->bandwidth_in_bits_per_second = (u64) (bandwidth); + mp->bandwidth_in_bits_per_second = + clib_host_to_net_u64 (mp->bandwidth_in_bits_per_second); + + /* send it... */ + S (mp); + + /* Wait for a reply... */ + W (ret); + return ret; +} + +/* + * List of messages that the api test plugin sends, + * and that the data plane plugin processes + */ +#define foreach_vpe_api_msg \ +_(nsim_enable_disable, \ +"[<intfc0> | sw_if_index <swif0>] [<intfc1> | sw_if_index <swif1>] [disable]") \ +_(nsim_configure, "delay <time> bandwidth <bw> [packet-size <nn>]") + +static void +nsim_api_hookup (vat_main_t * vam) +{ + nsim_test_main_t *sm = &nsim_test_main; + /* Hook up handlers for replies from the data plane plug-in */ +#define _(N,n) \ + vl_msg_api_set_handlers((VL_API_##N + sm->msg_id_base), \ + #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_vpe_api_reply_msg; +#undef _ + + /* API messages we can send */ +#define _(n,h) hash_set_mem (vam->function_by_name, #n, api_##n); + foreach_vpe_api_msg; +#undef _ + + /* Help strings */ +#define _(n,h) hash_set_mem (vam->help_by_name, #n, h); + foreach_vpe_api_msg; +#undef _ +} + +clib_error_t * +vat_plugin_register (vat_main_t * vam) +{ + nsim_test_main_t *sm = &nsim_test_main; + u8 *name; + + sm->vat_main = vam; + + /* Ask the vpp engine for the first assigned message-id */ + name = format (0, "nsim_%08x%c", api_version, 0); + sm->msg_id_base = vl_client_get_first_plugin_msg_id ((char *) name); + + if (sm->msg_id_base != (u16) ~ 0) + nsim_api_hookup (vam); + + vec_free (name); + + return 0; +} + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |