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/*
*------------------------------------------------------------------
* 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:
*/
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