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/*
* Copyright (c) 2015 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/vxlan-gpe/vxlan_gpe.h>
#include <vnet/ip/format.h>
vxlan_gpe_main_t vxlan_gpe_main;
u8 * format_vxlan_gpe_tunnel (u8 * s, va_list * args)
{
vxlan_gpe_tunnel_t * t = va_arg (*args, vxlan_gpe_tunnel_t *);
vxlan_gpe_main_t * gm = &vxlan_gpe_main;
s = format (s, "[%d] local: %U remote: %U ",
t - gm->tunnels,
format_ip46_address, &t->local,
format_ip46_address, &t->remote);
s = format (s, " vxlan VNI %d ", t->vni);
switch (t->protocol)
{
case VXLAN_GPE_PROTOCOL_IP4:
s = format (s, "next-protocol ip4");
break;
case VXLAN_GPE_PROTOCOL_IP6:
s = format (s, "next-protocol ip6");
break;
case VXLAN_GPE_PROTOCOL_ETHERNET:
s = format (s, "next-protocol ethernet");
break;
case VXLAN_GPE_PROTOCOL_NSH:
s = format (s, "next-protocol nsh");
break;
default:
s = format (s, "next-protocol unknown %d", t->protocol);
}
s = format (s, " fibs: (encap %d, decap %d)",
t->encap_fib_index,
t->decap_fib_index);
return s;
}
static u8 * format_vxlan_gpe_name (u8 * s, va_list * args)
{
u32 dev_instance = va_arg (*args, u32);
return format (s, "vxlan_gpe_tunnel%d", dev_instance);
}
static uword dummy_interface_tx (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
clib_warning ("you shouldn't be here, leaking buffers...");
return frame->n_vectors;
}
static clib_error_t *
vxlan_gpe_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
{
if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
vnet_hw_interface_set_flags (vnm, hw_if_index, VNET_HW_INTERFACE_FLAG_LINK_UP);
else
vnet_hw_interface_set_flags (vnm, hw_if_index, 0);
return 0;
}
VNET_DEVICE_CLASS (vxlan_gpe_device_class,static) = {
.name = "VXLAN_GPE",
.format_device_name = format_vxlan_gpe_name,
.format_tx_trace = format_vxlan_gpe_encap_trace,
.tx_function = dummy_interface_tx,
.admin_up_down_function = vxlan_gpe_interface_admin_up_down,
};
static uword dummy_set_rewrite (vnet_main_t * vnm,
u32 sw_if_index,
u32 l3_type,
void * dst_address,
void * rewrite,
uword max_rewrite_bytes)
{
return 0;
}
static u8 * format_vxlan_gpe_header_with_length (u8 * s, va_list * args)
{
u32 dev_instance = va_arg (*args, u32);
s = format (s, "unimplemented dev %u", dev_instance);
return s;
}
VNET_HW_INTERFACE_CLASS (vxlan_gpe_hw_class) = {
.name = "VXLAN_GPE",
.format_header = format_vxlan_gpe_header_with_length,
.set_rewrite = dummy_set_rewrite,
};
#define foreach_gpe_copy_field \
_(vni) \
_(protocol) \
_(encap_fib_index) \
_(decap_fib_index)
#define foreach_copy_ipv4 { \
_(local.ip4.as_u32) \
_(remote.ip4.as_u32) \
}
#define foreach_copy_ipv6 { \
_(local.ip6.as_u64[0]) \
_(local.ip6.as_u64[1]) \
_(remote.ip6.as_u64[0]) \
_(remote.ip6.as_u64[1]) \
}
static int vxlan4_gpe_rewrite (vxlan_gpe_tunnel_t * t)
{
u8 *rw = 0;
ip4_header_t * ip0;
ip4_vxlan_gpe_header_t * h0;
int len;
len = sizeof (*h0);
vec_validate_aligned (rw, len-1, CLIB_CACHE_LINE_BYTES);
h0 = (ip4_vxlan_gpe_header_t *) rw;
/* Fixed portion of the (outer) ip4 header */
ip0 = &h0->ip4;
ip0->ip_version_and_header_length = 0x45;
ip0->ttl = 254;
ip0->protocol = IP_PROTOCOL_UDP;
/* we fix up the ip4 header length and checksum after-the-fact */
ip0->src_address.as_u32 = t->local.ip4.as_u32;
ip0->dst_address.as_u32 = t->remote.ip4.as_u32;
ip0->checksum = ip4_header_checksum (ip0);
/* UDP header, randomize src port on something, maybe? */
h0->udp.src_port = clib_host_to_net_u16 (4790);
h0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_vxlan_gpe);
/* VXLAN header. Are we having fun yet? */
h0->vxlan.flags = VXLAN_GPE_FLAGS_I | VXLAN_GPE_FLAGS_P;
h0->vxlan.ver_res = VXLAN_GPE_VERSION;
h0->vxlan.protocol = VXLAN_GPE_PROTOCOL_IP4;
h0->vxlan.vni_res = clib_host_to_net_u32 (t->vni<<8);
t->rewrite = rw;
return (0);
}
static int vxlan6_gpe_rewrite (vxlan_gpe_tunnel_t * t)
{
u8 *rw = 0;
ip6_header_t * ip0;
ip6_vxlan_gpe_header_t * h0;
int len;
len = sizeof (*h0);
vec_validate_aligned (rw, len-1, CLIB_CACHE_LINE_BYTES);
h0 = (ip6_vxlan_gpe_header_t *) rw;
/* Fixed portion of the (outer) ip4 header */
ip0 = &h0->ip6;
ip0->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32(6 << 28);
ip0->hop_limit = 255;
ip0->protocol = IP_PROTOCOL_UDP;
ip0->src_address.as_u64[0] = t->local.ip6.as_u64[0];
ip0->src_address.as_u64[1] = t->local.ip6.as_u64[1];
ip0->dst_address.as_u64[0] = t->remote.ip6.as_u64[0];
ip0->dst_address.as_u64[1] = t->remote.ip6.as_u64[1];
/* UDP header, randomize src port on something, maybe? */
h0->udp.src_port = clib_host_to_net_u16 (4790);
h0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_vxlan_gpe);
/* VXLAN header. Are we having fun yet? */
h0->vxlan.flags = VXLAN_GPE_FLAGS_I | VXLAN_GPE_FLAGS_P;
h0->vxlan.ver_res = VXLAN_GPE_VERSION;
h0->vxlan.protocol = VXLAN_GPE_PROTOCOL_IP4;
h0->vxlan.vni_res = clib_host_to_net_u32 (t->vni<<8);
t->rewrite = rw;
return (0);
}
int vnet_vxlan_gpe_add_del_tunnel
(vnet_vxlan_gpe_add_del_tunnel_args_t *a, u32 * sw_if_indexp)
{
vxlan_gpe_main_t * gm = &vxlan_gpe_main;
vxlan_gpe_tunnel_t *t = 0;
vnet_main_t * vnm = gm->vnet_main;
vnet_hw_interface_t * hi;
uword * p;
u32 hw_if_index = ~0;
u32 sw_if_index = ~0;
int rv;
vxlan4_gpe_tunnel_key_t key4, *key4_copy;
vxlan6_gpe_tunnel_key_t key6, *key6_copy;
hash_pair_t *hp;
if (!a->is_ip6)
{
key4.local = a->local.ip4.as_u32;
key4.remote = a->remote.ip4.as_u32;
key4.vni = clib_host_to_net_u32 (a->vni << 8);
key4.pad = 0;
p = hash_get_mem(gm->vxlan4_gpe_tunnel_by_key, &key4);
}
else
{
key6.local.as_u64[0] = a->local.ip6.as_u64[0];
key6.local.as_u64[1] = a->local.ip6.as_u64[1];
key6.remote.as_u64[0] = a->remote.ip6.as_u64[0];
key6.remote.as_u64[1] = a->remote.ip6.as_u64[1];
key6.vni = clib_host_to_net_u32 (a->vni << 8);
p = hash_get_mem(gm->vxlan6_gpe_tunnel_by_key, &key6);
}
if (a->is_add)
{
/* adding a tunnel: tunnel must not already exist */
if (p)
return VNET_API_ERROR_INVALID_VALUE;
pool_get_aligned (gm->tunnels, t, CLIB_CACHE_LINE_BYTES);
memset (t, 0, sizeof (*t));
/* copy from arg structure */
#define _(x) t->x = a->x;
foreach_gpe_copy_field;
if (!a->is_ip6) foreach_copy_ipv4
else foreach_copy_ipv6
#undef _
if (!a->is_ip6) t->flags |= VXLAN_GPE_TUNNEL_IS_IPV4;
if (!a->is_ip6) {
rv = vxlan4_gpe_rewrite (t);
} else {
rv = vxlan6_gpe_rewrite (t);
}
if (rv)
{
pool_put (gm->tunnels, t);
return rv;
}
if (!a->is_ip6)
{
key4_copy = clib_mem_alloc (sizeof (*key4_copy));
clib_memcpy (key4_copy, &key4, sizeof (*key4_copy));
hash_set_mem (gm->vxlan4_gpe_tunnel_by_key, key4_copy,
t - gm->tunnels);
}
else
{
key6_copy = clib_mem_alloc (sizeof (*key6_copy));
clib_memcpy (key6_copy, &key6, sizeof (*key6_copy));
hash_set_mem (gm->vxlan6_gpe_tunnel_by_key, key6_copy,
t - gm->tunnels);
}
if (vec_len (gm->free_vxlan_gpe_tunnel_hw_if_indices) > 0)
{
hw_if_index = gm->free_vxlan_gpe_tunnel_hw_if_indices
[vec_len (gm->free_vxlan_gpe_tunnel_hw_if_indices)-1];
_vec_len (gm->free_vxlan_gpe_tunnel_hw_if_indices) -= 1;
hi = vnet_get_hw_interface (vnm, hw_if_index);
hi->dev_instance = t - gm->tunnels;
hi->hw_instance = hi->dev_instance;
}
else
{
hw_if_index = vnet_register_interface
(vnm, vxlan_gpe_device_class.index, t - gm->tunnels,
vxlan_gpe_hw_class.index, t - gm->tunnels);
hi = vnet_get_hw_interface (vnm, hw_if_index);
hi->output_node_index = vxlan_gpe_encap_node.index;
}
t->hw_if_index = hw_if_index;
t->sw_if_index = sw_if_index = hi->sw_if_index;
vec_validate_init_empty (gm->tunnel_index_by_sw_if_index, sw_if_index, ~0);
gm->tunnel_index_by_sw_if_index[sw_if_index] = t - gm->tunnels;
vnet_sw_interface_set_flags (vnm, hi->sw_if_index,
VNET_SW_INTERFACE_FLAG_ADMIN_UP);
}
else
{
/* deleting a tunnel: tunnel must exist */
if (!p)
return VNET_API_ERROR_NO_SUCH_ENTRY;
t = pool_elt_at_index (gm->tunnels, p[0]);
vnet_sw_interface_set_flags (vnm, t->sw_if_index, 0 /* down */);
vec_add1 (gm->free_vxlan_gpe_tunnel_hw_if_indices, t->hw_if_index);
gm->tunnel_index_by_sw_if_index[t->sw_if_index] = ~0;
if (!a->is_ip6)
{
hp = hash_get_pair (gm->vxlan4_gpe_tunnel_by_key, &key4);
key4_copy = (void *)(hp->key);
hash_unset_mem (gm->vxlan4_gpe_tunnel_by_key, &key4);
clib_mem_free (key4_copy);
}
else
{
hp = hash_get_pair (gm->vxlan6_gpe_tunnel_by_key, &key6);
key6_copy = (void *)(hp->key);
hash_unset_mem (gm->vxlan4_gpe_tunnel_by_key, &key6);
clib_mem_free (key6_copy);
}
vec_free (t->rewrite);
pool_put (gm->tunnels, t);
}
if (sw_if_indexp)
*sw_if_indexp = sw_if_index;
return 0;
}
static u32 fib4_index_from_fib_id (u32 fib_id)
{
ip4_main_t * im = &ip4_main;
uword * p;
p = hash_get (im->fib_index_by_table_id, fib_id);
if (!p)
return ~0;
return p[0];
}
static u32 fib6_index_from_fib_id (u32 fib_id)
{
ip6_main_t * im = &ip6_main;
uword * p;
p = hash_get (im->fib_index_by_table_id, fib_id);
if (!p)
return ~0;
return p[0];
}
static clib_error_t *
vxlan_gpe_add_del_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;
u8 is_add = 1;
ip46_address_t local, remote;
u8 local_set = 0;
u8 remote_set = 0;
u8 ipv4_set = 0;
u8 ipv6_set = 0;
u32 encap_fib_index = 0;
u32 decap_fib_index = 0;
u8 protocol = VXLAN_GPE_PROTOCOL_IP4;
u32 vni;
u8 vni_set = 0;
int rv;
u32 tmp;
vnet_vxlan_gpe_add_del_tunnel_args_t _a, * a = &_a;
u32 sw_if_index;
/* 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, "del"))
is_add = 0;
else if (unformat (line_input, "local %U",
unformat_ip4_address, &local.ip4))
{
local_set = 1;
ipv4_set = 1;
}
else if (unformat (line_input, "remote %U",
unformat_ip4_address, &remote.ip4))
{
remote_set = 1;
ipv4_set = 1;
}
else if (unformat (line_input, "local %U",
unformat_ip6_address, &local.ip6))
{
local_set = 1;
ipv6_set = 1;
}
else if (unformat (line_input, "remote %U",
unformat_ip6_address, &remote.ip6))
{
remote_set = 1;
ipv6_set = 1;
}
else if (unformat (line_input, "encap-vrf-id %d", &tmp))
{
if (ipv6_set)
encap_fib_index = fib6_index_from_fib_id (tmp);
else
encap_fib_index = fib4_index_from_fib_id (tmp);
if (encap_fib_index == ~0)
return clib_error_return (0, "nonexistent encap fib id %d", tmp);
}
else if (unformat (line_input, "decap-vrf-id %d", &tmp))
{
if (ipv6_set)
decap_fib_index = fib6_index_from_fib_id (tmp);
else
decap_fib_index = fib4_index_from_fib_id (tmp);
if (decap_fib_index == ~0)
return clib_error_return (0, "nonexistent decap fib id %d", tmp);
}
else if (unformat (line_input, "vni %d", &vni))
vni_set = 1;
else if (unformat(line_input, "next-ip4"))
protocol = VXLAN_GPE_PROTOCOL_IP4;
else if (unformat(line_input, "next-ip6"))
protocol = VXLAN_GPE_PROTOCOL_IP6;
else if (unformat(line_input, "next-ethernet"))
protocol = VXLAN_GPE_PROTOCOL_ETHERNET;
else if (unformat(line_input, "next-nsh"))
protocol = VXLAN_GPE_PROTOCOL_NSH;
else
return clib_error_return (0, "parse error: '%U'",
format_unformat_error, line_input);
}
unformat_free (line_input);
if (local_set == 0)
return clib_error_return (0, "tunnel local address not specified");
if (remote_set == 0)
return clib_error_return (0, "tunnel remote address not specified");
if (ipv4_set && ipv6_set)
return clib_error_return (0, "both IPv4 and IPv6 addresses specified");
if ((ipv4_set && memcmp(&local.ip4, &remote.ip4, sizeof(local.ip4)) == 0) ||
(ipv6_set && memcmp(&local.ip6, &remote.ip6, sizeof(local.ip6)) == 0))
return clib_error_return (0, "src and dst addresses are identical");
if (vni_set == 0)
return clib_error_return (0, "vni not specified");
memset (a, 0, sizeof (*a));
a->is_add = is_add;
a->is_ip6 = ipv6_set;
#define _(x) a->x = x;
foreach_gpe_copy_field;
if (ipv4_set) foreach_copy_ipv4
else foreach_copy_ipv6
#undef _
rv = vnet_vxlan_gpe_add_del_tunnel (a, &sw_if_index);
switch(rv)
{
case 0:
vlib_cli_output(vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main(), sw_if_index);
break;
case VNET_API_ERROR_INVALID_DECAP_NEXT:
return clib_error_return (0, "invalid decap-next...");
case VNET_API_ERROR_TUNNEL_EXIST:
return clib_error_return (0, "tunnel already exists...");
case VNET_API_ERROR_NO_SUCH_ENTRY:
return clib_error_return (0, "tunnel does not exist...");
default:
return clib_error_return
(0, "vnet_vxlan_gpe_add_del_tunnel returned %d", rv);
}
return 0;
}
VLIB_CLI_COMMAND (create_vxlan_gpe_tunnel_command, static) = {
.path = "create vxlan-gpe tunnel",
.short_help =
"create vxlan-gpe tunnel local <local-addr> remote <remote-addr>"
" vni <nn> [next-ip4][next-ip6][next-ethernet][next-nsh]"
" [encap-vrf-id <nn>] [decap-vrf-id <nn>]"
" [del]\n",
.function = vxlan_gpe_add_del_tunnel_command_fn,
};
static clib_error_t *
show_vxlan_gpe_tunnel_command_fn (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
vxlan_gpe_main_t * gm = &vxlan_gpe_main;
vxlan_gpe_tunnel_t * t;
if (pool_elts (gm->tunnels) == 0)
vlib_cli_output (vm, "No vxlan-gpe tunnels configured.");
pool_foreach (t, gm->tunnels,
({
vlib_cli_output (vm, "%U", format_vxlan_gpe_tunnel, t);
}));
return 0;
}
VLIB_CLI_COMMAND (show_vxlan_gpe_tunnel_command, static) = {
.path = "show vxlan-gpe",
.function = show_vxlan_gpe_tunnel_command_fn,
};
clib_error_t *vxlan_gpe_init (vlib_main_t *vm)
{
vxlan_gpe_main_t *gm = &vxlan_gpe_main;
gm->vnet_main = vnet_get_main();
gm->vlib_main = vm;
gm->vxlan4_gpe_tunnel_by_key
= hash_create_mem (0, sizeof(vxlan4_gpe_tunnel_key_t), sizeof (uword));
gm->vxlan6_gpe_tunnel_by_key
= hash_create_mem (0, sizeof(vxlan6_gpe_tunnel_key_t), sizeof (uword));
udp_register_dst_port (vm, UDP_DST_PORT_vxlan_gpe,
vxlan4_gpe_input_node.index, 1 /* is_ip4 */);
udp_register_dst_port (vm, UDP_DST_PORT_vxlan6_gpe,
vxlan6_gpe_input_node.index, 0 /* is_ip4 */);
return 0;
}
VLIB_INIT_FUNCTION(vxlan_gpe_init);
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