/* *------------------------------------------------------------------ * af_packet.c - linux kernel packet interface * * 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 <fcntl.h> /* for open */ #include <sys/ioctl.h> #include <sys/socket.h> #include <sys/stat.h> #include <sys/types.h> #include <sys/uio.h> /* for iovec */ #include <netinet/in.h> #include <vlib/vlib.h> #include <vlib/unix/unix.h> #include <vnet/ip/ip.h> #include <vnet/ethernet/ethernet.h> #include <vnet/devices/af_packet/af_packet.h> /** * @file * @brief CLI for Host Interface Device Driver. * * This file contains the source code for CLI for the host interface. */ static clib_error_t * af_packet_create_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; u8 *host_if_name = NULL; u8 hwaddr[6]; u8 *hw_addr_ptr = 0; u32 sw_if_index; int r; clib_error_t *error = NULL; /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) return 0; while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "name %s", &host_if_name)) ; else if (unformat (line_input, "hw-addr %U", unformat_ethernet_address, hwaddr)) hw_addr_ptr = hwaddr; else { error = clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); goto done; } } if (host_if_name == NULL) { error = clib_error_return (0, "missing host interface name"); goto done; } r = af_packet_create_if (vm, host_if_name, hw_addr_ptr, &sw_if_index); if (r == VNET_API_ERROR_SYSCALL_ERROR_1) { error = clib_error_return (0, "%s (errno %d)", strerror (errno), errno); goto done; } if (r == VNET_API_ERROR_INVALID_INTERFACE) { error = clib_error_return (0, "Invalid interface name"); goto done; } if (r == VNET_API_ERROR_SUBIF_ALREADY_EXISTS) { error = clib_error_return (0, "Interface elready exists"); goto done; } vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (), sw_if_index); done: vec_free (host_if_name); unformat_free (line_input); return error; } /*? * Create a host interface that will attach to a linux AF_PACKET * interface, one side of a veth pair. The veth pair must already * exist. Once created, a new host interface will exist in VPP * with the name '<em>host-<ifname></em>', where '<em><ifname></em>' * is the name of the specified veth pair. Use the * '<em>show interface</em>' command to display host interface details. * * This command has the following optional parameters: * * - <b>hw-addr <mac-addr></b> - Optional ethernet address, can be in either * X:X:X:X:X:X unix or X.X.X cisco format. * * @cliexpar * Example of how to create a host interface tied to one side of an * existing linux veth pair named vpp1: * @cliexstart{create host-interface name vpp1} * host-vpp1 * @cliexend * Once the host interface is created, enable the interface using: * @cliexcmd{set interface state host-vpp1 up} ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (af_packet_create_command, static) = { .path = "create host-interface", .short_help = "create host-interface name <ifname> [hw-addr <mac-addr>]", .function = af_packet_create_command_fn, }; /* *INDENT-ON* */ static clib_error_t * af_packet_delete_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; u8 *host_if_name = NULL; clib_error_t *error = NULL; /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) return 0; while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "name %s", &host_if_name)) ; else { error = clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); goto done; } } if (host_if_name == NULL) { error = clib_error_return (0, "missing host interface name"); goto done; } af_packet_delete_if (vm, host_if_name); done: vec_free (host_if_name); unformat_free (line_input); return error; } /*? * Delete a host interface. Use the linux interface name to identify * the host interface to be deleted. In VPP, host interfaces are * named as '<em>host-<ifname></em>', where '<em><ifname></em>' * is the name of the linux interface. * * @cliexpar * Example of how to delete a host interface named host-vpp1: * @cliexcmd{delete host-interface name vpp1} ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (af_packet_delete_command, static) = { .path = "delete host-interface", .short_help = "delete host-interface name <ifname>", .function = af_packet_delete_command_fn, }; /* *INDENT-ON* */ clib_error_t * af_packet_cli_init (vlib_main_t * vm) { return 0; } VLIB_INIT_FUNCTION (af_packet_cli_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */