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 <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)
62 arg->flags = AF_PACKET_IF_FLAGS_QDISC_BYPASS | AF_PACKET_IF_FLAGS_CKSUM_GSO;
64 /* Get a line of input. */
65 if (!unformat_user (input, unformat_line_input, line_input))
68 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
70 if (unformat (line_input, "name %s", &arg->host_if_name))
72 else if (unformat (line_input, "rx-size %u", &arg->rx_frame_size))
74 else if (unformat (line_input, "tx-size %u", &arg->tx_frame_size))
76 else if (unformat (line_input, "rx-per-block %u",
77 &arg->rx_frames_per_block))
79 else if (unformat (line_input, "tx-per-block %u",
80 &arg->tx_frames_per_block))
82 else if (unformat (line_input, "num-rx-queues %u", &arg->num_rxqs))
84 else if (unformat (line_input, "num-tx-queues %u", &arg->num_txqs))
86 else if (unformat (line_input, "qdisc-bypass-disable"))
87 arg->flags &= ~AF_PACKET_IF_FLAGS_QDISC_BYPASS;
88 else if (unformat (line_input, "cksum-gso-disable"))
89 arg->flags &= ~AF_PACKET_IF_FLAGS_CKSUM_GSO;
90 else if (unformat (line_input, "mode ip"))
91 arg->mode = AF_PACKET_IF_MODE_IP;
92 else if (unformat (line_input, "v2"))
94 else if (unformat (line_input, "hw-addr %U", unformat_ethernet_address,
96 arg->hw_addr = hwaddr;
99 error = clib_error_return (0, "unknown input `%U'",
100 format_unformat_error, line_input);
105 if (arg->host_if_name == NULL)
107 error = clib_error_return (0, "missing host interface name");
111 r = af_packet_create_if (arg);
113 if (r == VNET_API_ERROR_SYSCALL_ERROR_1)
115 error = clib_error_return (0, "%s (errno %d)", strerror (errno), errno);
119 if (r == VNET_API_ERROR_INVALID_INTERFACE)
121 error = clib_error_return (0, "Invalid interface name");
125 if (r == VNET_API_ERROR_SUBIF_ALREADY_EXISTS)
127 error = clib_error_return (0, "Interface already exists");
131 vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
135 vec_free (arg->host_if_name);
136 unformat_free (line_input);
142 * Create a host interface that will attach to a linux AF_PACKET
143 * interface, one side of a veth pair. The veth pair must already
144 * exist. Once created, a new host interface will exist in VPP
145 * with the name '<em>host-<ifname></em>', where '<em><ifname></em>'
146 * is the name of the specified veth pair. Use the
147 * '<em>show interface</em>' command to display host interface details.
149 * This command has the following optional parameters:
151 * - <b>hw-addr <mac-addr></b> - Optional ethernet address, can be in either
152 * X:X:X:X:X:X unix or X.X.X cisco format.
155 * Example of how to create a host interface tied to one side of an
156 * existing linux veth pair named vpp1:
157 * @cliexstart{create host-interface name vpp1}
160 * Once the host interface is created, enable the interface using:
161 * @cliexcmd{set interface state host-vpp1 up}
163 VLIB_CLI_COMMAND (af_packet_create_command, static) = {
164 .path = "create host-interface",
165 .short_help = "create host-interface [v2] name <ifname> [num-rx-queues <n>] "
166 "[num-tx-queues <n>] [hw-addr <mac-addr>] [mode ip] "
167 "[qdisc-bypass-disable] [cksum-gso-disable]",
168 .function = af_packet_create_command_fn,
171 static clib_error_t *
172 af_packet_delete_command_fn (vlib_main_t * vm, unformat_input_t * input,
173 vlib_cli_command_t * cmd)
175 unformat_input_t _line_input, *line_input = &_line_input;
176 u8 *host_if_name = NULL;
177 clib_error_t *error = NULL;
179 /* Get a line of input. */
180 if (!unformat_user (input, unformat_line_input, line_input))
183 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
185 if (unformat (line_input, "name %s", &host_if_name))
189 error = clib_error_return (0, "unknown input `%U'",
190 format_unformat_error, line_input);
195 if (host_if_name == NULL)
197 error = clib_error_return (0, "missing host interface name");
201 af_packet_delete_if (host_if_name);
204 vec_free (host_if_name);
205 unformat_free (line_input);
211 * Delete a host interface. Use the linux interface name to identify
212 * the host interface to be deleted. In VPP, host interfaces are
213 * named as '<em>host-<ifname></em>', where '<em><ifname></em>'
214 * is the name of the linux interface.
217 * Example of how to delete a host interface named host-vpp1:
218 * @cliexcmd{delete host-interface name vpp1}
220 VLIB_CLI_COMMAND (af_packet_delete_command, static) = {
221 .path = "delete host-interface",
222 .short_help = "delete host-interface name <ifname>",
223 .function = af_packet_delete_command_fn,
226 static clib_error_t *
227 af_packet_set_l4_cksum_offload_command_fn (vlib_main_t * vm,
228 unformat_input_t * input,
229 vlib_cli_command_t * cmd)
231 unformat_input_t _line_input, *line_input = &_line_input;
233 clib_error_t *error = NULL;
234 vnet_main_t *vnm = vnet_get_main ();
237 if (!unformat_user (input, unformat_line_input, line_input))
240 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
242 if (unformat (line_input, "%U", unformat_vnet_sw_interface, vnm,
245 else if (unformat (line_input, "on"))
247 else if (unformat (line_input, "off"))
251 error = clib_error_return (0, "unknown input '%U'",
252 format_unformat_error, line_input);
257 if (af_packet_set_l4_cksum_offload (sw_if_index, set) < 0)
258 error = clib_error_return (0, "not an af_packet interface");
261 unformat_free (line_input);
266 * Set TCP/UDP offload checksum calculation. Use interface
267 * name to identify the interface to set TCP/UDP offload checksum
271 * Example of how to set TCP/UDP offload checksum calculation on host-vpp0:
272 * @cliexcmd{set host-interface l4-cksum-offload host-vpp0 off}
273 * @cliexcmd{set host-interface l4-cksum-offload host-vpp0 on}
275 VLIB_CLI_COMMAND (af_packet_set_l4_cksum_offload_command, static) = {
276 .path = "set host-interface l4-cksum-offload",
277 .short_help = "set host-interface l4-cksum-offload <host-if-name> <on|off>",
278 .function = af_packet_set_l4_cksum_offload_command_fn,
281 static clib_error_t *
282 af_packet_enable_disable_qdisc_bypass_command_fn (vlib_main_t *vm,
283 unformat_input_t *input,
284 vlib_cli_command_t *cmd)
286 unformat_input_t _line_input, *line_input = &_line_input;
287 u8 enable_disable = 0;
288 clib_error_t *error = NULL;
289 vnet_main_t *vnm = vnet_get_main ();
292 if (!unformat_user (input, unformat_line_input, line_input))
295 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
297 if (unformat (line_input, "%U", unformat_vnet_sw_interface, vnm,
300 else if (unformat (line_input, "enable"))
302 else if (unformat (line_input, "disable"))
306 error = clib_error_return (0, "unknown input '%U'",
307 format_unformat_error, line_input);
312 if (af_packet_enable_disable_qdisc_bypass (sw_if_index, enable_disable) < 0)
313 error = clib_error_return (0, "not an af_packet interface");
316 unformat_free (line_input);
320 VLIB_CLI_COMMAND (af_packet_enable_disable_qdisc_bypass_command, static) = {
321 .path = "set host-interface qdisc-bypass",
323 "set host-interface qdisc-bypass <host-if-name> <enable|disable>",
324 .function = af_packet_enable_disable_qdisc_bypass_command_fn,
328 af_packet_cli_init (vlib_main_t * vm)
333 VLIB_INIT_FUNCTION (af_packet_cli_init);
336 * fd.io coding-style-patch-verification: ON
339 * eval: (c-set-style "gnu")