2 *------------------------------------------------------------------
3 * af_packet.c - linux kernel packet interface
5 * Copyright (c) 2016 Cisco and/or its affiliates.
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at:
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 *------------------------------------------------------------------
20 #include <fcntl.h> /* for open */
21 #include <sys/ioctl.h>
22 #include <sys/socket.h>
24 #include <sys/types.h>
25 #include <sys/uio.h> /* for iovec */
26 #include <netinet/in.h>
28 #include <vlib/vlib.h>
29 #include <vlib/unix/unix.h>
30 #include <vnet/ip/ip.h>
31 #include <vnet/ethernet/ethernet.h>
33 #include <vnet/devices/af_packet/af_packet.h>
37 * @brief CLI for Host Interface Device Driver.
39 * This file contains the source code for CLI for the host interface.
43 af_packet_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
44 vlib_cli_command_t * cmd)
46 unformat_input_t _line_input, *line_input = &_line_input;
47 af_packet_create_if_arg_t _arg, *arg = &_arg;
48 clib_error_t *error = NULL;
52 clib_memset (arg, 0, sizeof (*arg));
55 arg->mode = AF_PACKET_IF_MODE_ETHERNET;
57 // Default number of rx/tx queue(s)
61 /* Get a line of input. */
62 if (!unformat_user (input, unformat_line_input, line_input))
65 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
67 if (unformat (line_input, "name %s", &arg->host_if_name))
69 else if (unformat (line_input, "rx-size %u", &arg->rx_frame_size))
71 else if (unformat (line_input, "tx-size %u", &arg->tx_frame_size))
73 else if (unformat (line_input, "rx-per-block %u",
74 &arg->rx_frames_per_block))
76 else if (unformat (line_input, "tx-per-block %u",
77 &arg->tx_frames_per_block))
79 else if (unformat (line_input, "num-rx-queues %u", &arg->num_rxqs))
81 else if (unformat (line_input, "num-tx-queues %u", &arg->num_txqs))
83 else if (unformat (line_input, "mode ip"))
84 arg->mode = AF_PACKET_IF_MODE_IP;
85 else if (unformat (line_input, "hw-addr %U", unformat_ethernet_address,
87 arg->hw_addr = hwaddr;
90 error = clib_error_return (0, "unknown input `%U'",
91 format_unformat_error, line_input);
96 if (arg->host_if_name == NULL)
98 error = clib_error_return (0, "missing host interface name");
102 r = af_packet_create_if (arg);
104 if (r == VNET_API_ERROR_SYSCALL_ERROR_1)
106 error = clib_error_return (0, "%s (errno %d)", strerror (errno), errno);
110 if (r == VNET_API_ERROR_INVALID_INTERFACE)
112 error = clib_error_return (0, "Invalid interface name");
116 if (r == VNET_API_ERROR_SUBIF_ALREADY_EXISTS)
118 error = clib_error_return (0, "Interface already exists");
122 vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
126 vec_free (arg->host_if_name);
127 unformat_free (line_input);
133 * Create a host interface that will attach to a linux AF_PACKET
134 * interface, one side of a veth pair. The veth pair must already
135 * exist. Once created, a new host interface will exist in VPP
136 * with the name '<em>host-<ifname></em>', where '<em><ifname></em>'
137 * is the name of the specified veth pair. Use the
138 * '<em>show interface</em>' command to display host interface details.
140 * This command has the following optional parameters:
142 * - <b>hw-addr <mac-addr></b> - Optional ethernet address, can be in either
143 * X:X:X:X:X:X unix or X.X.X cisco format.
146 * Example of how to create a host interface tied to one side of an
147 * existing linux veth pair named vpp1:
148 * @cliexstart{create host-interface name vpp1}
151 * Once the host interface is created, enable the interface using:
152 * @cliexcmd{set interface state host-vpp1 up}
154 VLIB_CLI_COMMAND (af_packet_create_command, static) = {
155 .path = "create host-interface",
156 .short_help = "create host-interface name <ifname> [num-rx-queues <n>] "
157 "[num-tx-queues <n>] [hw-addr <mac-addr>] [mode ip]",
158 .function = af_packet_create_command_fn,
161 static clib_error_t *
162 af_packet_delete_command_fn (vlib_main_t * vm, unformat_input_t * input,
163 vlib_cli_command_t * cmd)
165 unformat_input_t _line_input, *line_input = &_line_input;
166 u8 *host_if_name = NULL;
167 clib_error_t *error = NULL;
169 /* Get a line of input. */
170 if (!unformat_user (input, unformat_line_input, line_input))
173 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
175 if (unformat (line_input, "name %s", &host_if_name))
179 error = clib_error_return (0, "unknown input `%U'",
180 format_unformat_error, line_input);
185 if (host_if_name == NULL)
187 error = clib_error_return (0, "missing host interface name");
191 af_packet_delete_if (host_if_name);
194 vec_free (host_if_name);
195 unformat_free (line_input);
201 * Delete a host interface. Use the linux interface name to identify
202 * the host interface to be deleted. In VPP, host interfaces are
203 * named as '<em>host-<ifname></em>', where '<em><ifname></em>'
204 * is the name of the linux interface.
207 * Example of how to delete a host interface named host-vpp1:
208 * @cliexcmd{delete host-interface name vpp1}
210 VLIB_CLI_COMMAND (af_packet_delete_command, static) = {
211 .path = "delete host-interface",
212 .short_help = "delete host-interface name <ifname>",
213 .function = af_packet_delete_command_fn,
216 static clib_error_t *
217 af_packet_set_l4_cksum_offload_command_fn (vlib_main_t * vm,
218 unformat_input_t * input,
219 vlib_cli_command_t * cmd)
221 unformat_input_t _line_input, *line_input = &_line_input;
223 clib_error_t *error = NULL;
224 vnet_main_t *vnm = vnet_get_main ();
227 if (!unformat_user (input, unformat_line_input, line_input))
230 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
232 if (unformat (line_input, "%U", unformat_vnet_sw_interface, vnm,
235 else if (unformat (line_input, "on"))
237 else if (unformat (line_input, "off"))
241 error = clib_error_return (0, "unknown input '%U'",
242 format_unformat_error, line_input);
247 if (af_packet_set_l4_cksum_offload (sw_if_index, set) < 0)
248 error = clib_error_return (0, "not an af_packet interface");
251 unformat_free (line_input);
256 * Set TCP/UDP offload checksum calculation. Use interface
257 * name to identify the interface to set TCP/UDP offload checksum
261 * Example of how to set TCP/UDP offload checksum calculation on host-vpp0:
262 * @cliexcmd{set host-interface l4-cksum-offload host-vpp0 off}
263 * @cliexcmd{set host-interface l4-cksum-offload host-vpp0 on}
265 VLIB_CLI_COMMAND (af_packet_set_l4_cksum_offload_command, static) = {
266 .path = "set host-interface l4-cksum-offload",
267 .short_help = "set host-interface l4-cksum-offload <host-if-name> <on|off>",
268 .function = af_packet_set_l4_cksum_offload_command_fn,
272 af_packet_cli_init (vlib_main_t * vm)
277 VLIB_INIT_FUNCTION (af_packet_cli_init);
280 * fd.io coding-style-patch-verification: ON
283 * eval: (c-set-style "gnu")