diff options
author | Ed Warnicke <eaw@cisco.com> | 2015-12-08 15:45:58 -0700 |
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committer | Ed Warnicke <eaw@cisco.com> | 2015-12-08 15:47:27 -0700 |
commit | cb9cadad578297ffd78fa8a33670bdf1ab669e7e (patch) | |
tree | 6ac2be912482cc7849a26f0ab845561c3d7f4e26 /vnet/vnet/gre/interface.c | |
parent | fb0815d4ae4bb0fe27bd9313f34b45c8593b907e (diff) |
Initial commit of vpp code.v1.0.0
Change-Id: Ib246f1fbfce93274020ee93ce461e3d8bd8b9f17
Signed-off-by: Ed Warnicke <eaw@cisco.com>
Diffstat (limited to 'vnet/vnet/gre/interface.c')
-rw-r--r-- | vnet/vnet/gre/interface.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/vnet/vnet/gre/interface.c b/vnet/vnet/gre/interface.c new file mode 100644 index 00000000000..72ce0962fc7 --- /dev/null +++ b/vnet/vnet/gre/interface.c @@ -0,0 +1,150 @@ +/* + * gre_interface.c: gre interfaces + * + * Copyright (c) 2012 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 <vnet/vnet.h> +#include <vnet/pg/pg.h> +#include <vnet/gre/gre.h> + +int +gre_register_interface (vnet_main_t * vnm, + u32 dev_class_index, + ip4_address_t *tunnel_src, + ip4_address_t *tunnel_dst, + u32 outer_fib_id, + u32 * gi_index_return) +{ + gre_main_t * gm = &gre_main; + ip4_main_t * im = &ip4_main; + gre_tunnel_t * t; + vnet_hw_interface_t * hi; + u32 hw_if_index; + u32 slot; + u32 outer_fib_index; + uword * p; + + u64 key = (u64)tunnel_src->as_u32 << 32 | (u64)tunnel_dst->as_u32; + + /* check if same src/dst pair exists */ + if (hash_get (gm->tunnel_by_key, key)) + return VNET_API_ERROR_INVALID_VALUE; + + p = hash_get (im->fib_index_by_table_id, outer_fib_id); + if (! p) + return VNET_API_ERROR_NO_SUCH_FIB; + + outer_fib_index = p[0]; + + pool_get (gm->tunnels, t); + memset (t, 0, sizeof (*t)); + + hw_if_index = vnet_register_interface + (vnm, gre_device_class.index, t - gm->tunnels, + gre_hw_interface_class.index, + t - gm->tunnels); + + *gi_index_return = t - gm->tunnels; + + t->hw_if_index = hw_if_index; + t->outer_fib_index = outer_fib_index; + + hi = vnet_get_hw_interface (vnm, hw_if_index); + + hi->min_packet_bytes = 64 + sizeof (gre_header_t) + sizeof (ip4_header_t); + hi->per_packet_overhead_bytes = + /* preamble */ 8 + /* inter frame gap */ 12; + + /* Standard default gre MTU. */ + hi->max_l3_packet_bytes[VLIB_RX] = hi->max_l3_packet_bytes[VLIB_TX] = 1500; + + memcpy (&t->tunnel_src, tunnel_src, sizeof (t->tunnel_src)); + memcpy (&t->tunnel_dst, tunnel_dst, sizeof (t->tunnel_dst)); + + hash_set (gm->tunnel_by_key, key, t - gm->tunnels); + + slot = vlib_node_add_named_next_with_slot + (vnm->vlib_main, hi->tx_node_index, "ip4-lookup", GRE_OUTPUT_NEXT_LOOKUP); + + ASSERT (slot == GRE_OUTPUT_NEXT_LOOKUP); + + return 0; +} + + +static clib_error_t * +create_gre_tunnel_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + unformat_input_t _line_input, * line_input = &_line_input; + vnet_main_t * vnm = vnet_get_main(); + ip4_address_t src, dst; + u32 outer_fib_id = 0; + int rv; + u32 gi_index; + u32 num_m_args = 0; + + /* 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, "src %U", unformat_ip4_address, &src)) + num_m_args++; + else if (unformat (line_input, "dst %U", unformat_ip4_address, &dst)) + num_m_args++; + else if (unformat (line_input, "outer-fib-id %d", &outer_fib_id)) + ; + else + return clib_error_return (0, "unknown input `%U'", + format_unformat_error, input); + } + unformat_free (line_input); + + if (num_m_args < 2) + return clib_error_return (0, "mandatory argument(s) missing"); + + rv = gre_register_interface (vnm, gre_hw_interface_class.index, + &src, &dst, outer_fib_id, &gi_index); + + switch(rv) + { + case 0: + break; + case VNET_API_ERROR_INVALID_VALUE: + return clib_error_return (0, "GRE tunnel already exists..."); + case VNET_API_ERROR_NO_SUCH_FIB: + return clib_error_return (0, "outer fib ID %d doesn't exist\n", + outer_fib_id); + default: + return clib_error_return (0, "gre_register_interface returned %d", rv); + } + + return 0; +} + +VLIB_CLI_COMMAND (create_gre_tunnel_command, static) = { + .path = "create gre tunnel", + .short_help = "create gre tunnel src <addr> dst <addr> [outer-fib-id <fib>]", + .function = create_gre_tunnel_command_fn, +}; + +/* force inclusion from application's main.c */ +clib_error_t *gre_interface_init (vlib_main_t *vm) +{ + return 0; +} +VLIB_INIT_FUNCTION(gre_interface_init); |