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vpp/src/plugins/gtpu/gtpu.c
Jakub Grajciar e8964fefc7 gtpu: don't register udp ports unless a tunnel is created 
Change-Id: I2945c2a2062ee5eda78f783c55cf16c2d60f959c
Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>
2019-05-22 19:31:27 +00:00

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31 KiB
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/*
*------------------------------------------------------------------
* Copyright (c) 2017 Intel 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 <stdint.h>
#include <net/if.h>
#include <sys/ioctl.h>
#include <inttypes.h>
#include <vlib/vlib.h>
#include <vlib/unix/unix.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/fib/fib_entry.h>
#include <vnet/fib/fib_table.h>
#include <vnet/mfib/mfib_table.h>
#include <vnet/adj/adj_mcast.h>
#include <vnet/dpo/dpo.h>
#include <vnet/plugin/plugin.h>
#include <vpp/app/version.h>
#include <gtpu/gtpu.h>
gtpu_main_t gtpu_main;
/* *INDENT-OFF* */
VNET_FEATURE_INIT (ip4_gtpu_bypass, static) = {
.arc_name = "ip4-unicast",
.node_name = "ip4-gtpu-bypass",
.runs_before = VNET_FEATURES ("ip4-lookup"),
};
VNET_FEATURE_INIT (ip6_gtpu_bypass, static) = {
.arc_name = "ip6-unicast",
.node_name = "ip6-gtpu-bypass",
.runs_before = VNET_FEATURES ("ip6-lookup"),
};
/* *INDENT-on* */
u8 * format_gtpu_encap_trace (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
gtpu_encap_trace_t * t
= va_arg (*args, gtpu_encap_trace_t *);
s = format (s, "GTPU encap to gtpu_tunnel%d teid %d",
t->tunnel_index, t->teid);
return s;
}
static u8 *
format_decap_next (u8 * s, va_list * args)
{
u32 next_index = va_arg (*args, u32);
switch (next_index)
{
case GTPU_INPUT_NEXT_DROP:
return format (s, "drop");
case GTPU_INPUT_NEXT_L2_INPUT:
return format (s, "l2");
case GTPU_INPUT_NEXT_IP4_INPUT:
return format (s, "ip4");
case GTPU_INPUT_NEXT_IP6_INPUT:
return format (s, "ip6");
default:
return format (s, "index %d", next_index);
}
return s;
}
u8 *
format_gtpu_tunnel (u8 * s, va_list * args)
{
gtpu_tunnel_t *t = va_arg (*args, gtpu_tunnel_t *);
gtpu_main_t *ngm = &gtpu_main;
s = format (s, "[%d] src %U dst %U teid %d fib-idx %d sw-if-idx %d ",
t - ngm->tunnels,
format_ip46_address, &t->src, IP46_TYPE_ANY,
format_ip46_address, &t->dst, IP46_TYPE_ANY,
t->teid, t->encap_fib_index, t->sw_if_index);
s = format (s, "encap-dpo-idx %d ", t->next_dpo.dpoi_index);
s = format (s, "decap-next-%U ", format_decap_next, t->decap_next_index);
if (PREDICT_FALSE (ip46_address_is_multicast (&t->dst)))
s = format (s, "mcast-sw-if-idx %d ", t->mcast_sw_if_index);
return s;
}
static u8 *
format_gtpu_name (u8 * s, va_list * args)
{
u32 dev_instance = va_arg (*args, u32);
return format (s, "gtpu_tunnel%d", dev_instance);
}
static clib_error_t *
gtpu_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
{
u32 hw_flags = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ?
VNET_HW_INTERFACE_FLAG_LINK_UP : 0;
vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
return /* no error */ 0;
}
/* *INDENT-OFF* */
VNET_DEVICE_CLASS (gtpu_device_class,static) = {
.name = "GTPU",
.format_device_name = format_gtpu_name,
.format_tx_trace = format_gtpu_encap_trace,
.admin_up_down_function = gtpu_interface_admin_up_down,
};
/* *INDENT-ON* */
static u8 *
format_gtpu_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;
}
/* *INDENT-OFF* */
VNET_HW_INTERFACE_CLASS (gtpu_hw_class) =
{
.name = "GTPU",
.format_header = format_gtpu_header_with_length,
.build_rewrite = default_build_rewrite,
.flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
};
/* *INDENT-ON* */
static void
gtpu_tunnel_restack_dpo (gtpu_tunnel_t * t)
{
dpo_id_t dpo = DPO_INVALID;
u32 encap_index = ip46_address_is_ip4 (&t->dst) ?
gtpu4_encap_node.index : gtpu6_encap_node.index;
fib_forward_chain_type_t forw_type = ip46_address_is_ip4 (&t->dst) ?
FIB_FORW_CHAIN_TYPE_UNICAST_IP4 : FIB_FORW_CHAIN_TYPE_UNICAST_IP6;
fib_entry_contribute_forwarding (t->fib_entry_index, forw_type, &dpo);
dpo_stack_from_node (encap_index, &t->next_dpo, &dpo);
dpo_reset (&dpo);
}
static gtpu_tunnel_t *
gtpu_tunnel_from_fib_node (fib_node_t * node)
{
return ((gtpu_tunnel_t *) (((char *) node) -
STRUCT_OFFSET_OF (gtpu_tunnel_t, node)));
}
/**
* Function definition to backwalk a FIB node -
* Here we will restack the new dpo of GTPU DIP to encap node.
*/
static fib_node_back_walk_rc_t
gtpu_tunnel_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx)
{
gtpu_tunnel_restack_dpo (gtpu_tunnel_from_fib_node (node));
return (FIB_NODE_BACK_WALK_CONTINUE);
}
/**
* Function definition to get a FIB node from its index
*/
static fib_node_t *
gtpu_tunnel_fib_node_get (fib_node_index_t index)
{
gtpu_tunnel_t *t;
gtpu_main_t *gtm = &gtpu_main;
t = pool_elt_at_index (gtm->tunnels, index);
return (&t->node);
}
/**
* Function definition to inform the FIB node that its last lock has gone.
*/
static void
gtpu_tunnel_last_lock_gone (fib_node_t * node)
{
/*
* The GTPU tunnel is a root of the graph. As such
* it never has children and thus is never locked.
*/
ASSERT (0);
}
/*
* Virtual function table registered by GTPU tunnels
* for participation in the FIB object graph.
*/
const static fib_node_vft_t gtpu_vft = {
.fnv_get = gtpu_tunnel_fib_node_get,
.fnv_last_lock = gtpu_tunnel_last_lock_gone,
.fnv_back_walk = gtpu_tunnel_back_walk,
};
#define foreach_copy_field \
_(teid) \
_(mcast_sw_if_index) \
_(encap_fib_index) \
_(decap_next_index) \
_(src) \
_(dst)
static void
ip_udp_gtpu_rewrite (gtpu_tunnel_t * t, bool is_ip6)
{
union
{
ip4_gtpu_header_t *h4;
ip6_gtpu_header_t *h6;
u8 *rw;
} r =
{
.rw = 0};
int len = is_ip6 ? sizeof *r.h6 : sizeof *r.h4;
vec_validate_aligned (r.rw, len - 1, CLIB_CACHE_LINE_BYTES);
udp_header_t *udp;
gtpu_header_t *gtpu;
/* Fixed portion of the (outer) ip header */
if (!is_ip6)
{
ip4_header_t *ip = &r.h4->ip4;
udp = &r.h4->udp;
gtpu = &r.h4->gtpu;
ip->ip_version_and_header_length = 0x45;
ip->ttl = 254;
ip->protocol = IP_PROTOCOL_UDP;
ip->src_address = t->src.ip4;
ip->dst_address = t->dst.ip4;
/* we fix up the ip4 header length and checksum after-the-fact */
ip->checksum = ip4_header_checksum (ip);
}
else
{
ip6_header_t *ip = &r.h6->ip6;
udp = &r.h6->udp;
gtpu = &r.h6->gtpu;
ip->ip_version_traffic_class_and_flow_label =
clib_host_to_net_u32 (6 << 28);
ip->hop_limit = 255;
ip->protocol = IP_PROTOCOL_UDP;
ip->src_address = t->src.ip6;
ip->dst_address = t->dst.ip6;
}
/* UDP header, randomize src port on something, maybe? */
udp->src_port = clib_host_to_net_u16 (2152);
udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_GTPU);
/* GTPU header */
gtpu->ver_flags = GTPU_V1_VER | GTPU_PT_GTP;
gtpu->type = GTPU_TYPE_GTPU;
gtpu->teid = clib_host_to_net_u32 (t->teid);
t->rewrite = r.rw;
/* Now only support 8-byte gtpu header. TBD */
_vec_len (t->rewrite) = sizeof (ip4_gtpu_header_t) - 4;
return;
}
static bool
gtpu_decap_next_is_valid (gtpu_main_t * gtm, u32 is_ip6, u32 decap_next_index)
{
vlib_main_t *vm = gtm->vlib_main;
u32 input_idx = (!is_ip6) ? gtpu4_input_node.index : gtpu6_input_node.index;
vlib_node_runtime_t *r = vlib_node_get_runtime (vm, input_idx);
return decap_next_index < r->n_next_nodes;
}
static uword
vtep_addr_ref (ip46_address_t * ip)
{
uword *vtep = ip46_address_is_ip4 (ip) ?
hash_get (gtpu_main.vtep4, ip->ip4.as_u32) :
hash_get_mem (gtpu_main.vtep6, &ip->ip6);
if (vtep)
return ++(*vtep);
ip46_address_is_ip4 (ip) ?
hash_set (gtpu_main.vtep4, ip->ip4.as_u32, 1) :
hash_set_mem_alloc (&gtpu_main.vtep6, &ip->ip6, 1);
return 1;
}
static uword
vtep_addr_unref (ip46_address_t * ip)
{
uword *vtep = ip46_address_is_ip4 (ip) ?
hash_get (gtpu_main.vtep4, ip->ip4.as_u32) :
hash_get_mem (gtpu_main.vtep6, &ip->ip6);
ASSERT (vtep);
if (--(*vtep) != 0)
return *vtep;
ip46_address_is_ip4 (ip) ?
hash_unset (gtpu_main.vtep4, ip->ip4.as_u32) :
hash_unset_mem_free (&gtpu_main.vtep6, &ip->ip6);
return 0;
}
typedef CLIB_PACKED (union
{
struct
{
fib_node_index_t mfib_entry_index;
adj_index_t mcast_adj_index;
}; u64 as_u64;
}) mcast_shared_t;
static inline mcast_shared_t
mcast_shared_get (ip46_address_t * ip)
{
ASSERT (ip46_address_is_multicast (ip));
uword *p = hash_get_mem (gtpu_main.mcast_shared, ip);
ASSERT (p);
return (mcast_shared_t)
{
.as_u64 = *p};
}
static inline void
mcast_shared_add (ip46_address_t * dst, fib_node_index_t mfei, adj_index_t ai)
{
mcast_shared_t new_ep = {
.mcast_adj_index = ai,
.mfib_entry_index = mfei,
};
hash_set_mem_alloc (&gtpu_main.mcast_shared, dst, new_ep.as_u64);
}
static inline void
mcast_shared_remove (ip46_address_t * dst)
{
mcast_shared_t ep = mcast_shared_get (dst);
adj_unlock (ep.mcast_adj_index);
mfib_table_entry_delete_index (ep.mfib_entry_index, MFIB_SOURCE_GTPU);
hash_unset_mem_free (&gtpu_main.mcast_shared, dst);
}
int vnet_gtpu_add_del_tunnel
(vnet_gtpu_add_del_tunnel_args_t * a, u32 * sw_if_indexp)
{
gtpu_main_t *gtm = &gtpu_main;
gtpu_tunnel_t *t = 0;
vnet_main_t *vnm = gtm->vnet_main;
uword *p;
u32 hw_if_index = ~0;
u32 sw_if_index = ~0;
gtpu4_tunnel_key_t key4;
gtpu6_tunnel_key_t key6;
u32 is_ip6 = a->is_ip6;
if (!is_ip6)
{
key4.src = a->dst.ip4.as_u32; /* decap src in key is encap dst in config */
key4.teid = clib_host_to_net_u32 (a->teid);
p = hash_get (gtm->gtpu4_tunnel_by_key, key4.as_u64);
}
else
{
key6.src = a->dst.ip6;
key6.teid = clib_host_to_net_u32 (a->teid);
p = hash_get_mem (gtm->gtpu6_tunnel_by_key, &key6);
}
if (a->is_add)
{
l2input_main_t *l2im = &l2input_main;
/* adding a tunnel: tunnel must not already exist */
if (p)
return VNET_API_ERROR_TUNNEL_EXIST;
/*if not set explicitly, default to l2 */
if (a->decap_next_index == ~0)
a->decap_next_index = GTPU_INPUT_NEXT_L2_INPUT;
if (!gtpu_decap_next_is_valid (gtm, is_ip6, a->decap_next_index))
return VNET_API_ERROR_INVALID_DECAP_NEXT;
pool_get_aligned (gtm->tunnels, t, CLIB_CACHE_LINE_BYTES);
clib_memset (t, 0, sizeof (*t));
/* copy from arg structure */
#define _(x) t->x = a->x;
foreach_copy_field;
#undef _
ip_udp_gtpu_rewrite (t, is_ip6);
/* copy the key */
if (is_ip6)
hash_set_mem_alloc (&gtm->gtpu6_tunnel_by_key, &key6,
t - gtm->tunnels);
else
hash_set (gtm->gtpu4_tunnel_by_key, key4.as_u64, t - gtm->tunnels);
vnet_hw_interface_t *hi;
if (vec_len (gtm->free_gtpu_tunnel_hw_if_indices) > 0)
{
vnet_interface_main_t *im = &vnm->interface_main;
hw_if_index = gtm->free_gtpu_tunnel_hw_if_indices
[vec_len (gtm->free_gtpu_tunnel_hw_if_indices) - 1];
_vec_len (gtm->free_gtpu_tunnel_hw_if_indices) -= 1;
hi = vnet_get_hw_interface (vnm, hw_if_index);
hi->dev_instance = t - gtm->tunnels;
hi->hw_instance = hi->dev_instance;
/* clear old stats of freed tunnel before reuse */
sw_if_index = hi->sw_if_index;
vnet_interface_counter_lock (im);
vlib_zero_combined_counter
(&im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX],
sw_if_index);
vlib_zero_combined_counter (&im->combined_sw_if_counters
[VNET_INTERFACE_COUNTER_RX],
sw_if_index);
vlib_zero_simple_counter (&im->sw_if_counters
[VNET_INTERFACE_COUNTER_DROP],
sw_if_index);
vnet_interface_counter_unlock (im);
}
else
{
hw_if_index = vnet_register_interface
(vnm, gtpu_device_class.index, t - gtm->tunnels,
gtpu_hw_class.index, t - gtm->tunnels);
hi = vnet_get_hw_interface (vnm, hw_if_index);
}
/* Set gtpu tunnel output node */
u32 encap_index = !is_ip6 ?
gtpu4_encap_node.index : gtpu6_encap_node.index;
vnet_set_interface_output_node (vnm, hw_if_index, encap_index);
t->hw_if_index = hw_if_index;
t->sw_if_index = sw_if_index = hi->sw_if_index;
vec_validate_init_empty (gtm->tunnel_index_by_sw_if_index, sw_if_index,
~0);
gtm->tunnel_index_by_sw_if_index[sw_if_index] = t - gtm->tunnels;
/* setup l2 input config with l2 feature and bd 0 to drop packet */
vec_validate (l2im->configs, sw_if_index);
l2im->configs[sw_if_index].feature_bitmap = L2INPUT_FEAT_DROP;
l2im->configs[sw_if_index].bd_index = 0;
vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
si->flags &= ~VNET_SW_INTERFACE_FLAG_HIDDEN;
vnet_sw_interface_set_flags (vnm, sw_if_index,
VNET_SW_INTERFACE_FLAG_ADMIN_UP);
fib_node_init (&t->node, gtm->fib_node_type);
fib_prefix_t tun_dst_pfx;
vnet_flood_class_t flood_class = VNET_FLOOD_CLASS_TUNNEL_NORMAL;
fib_prefix_from_ip46_addr (&t->dst, &tun_dst_pfx);
if (!ip46_address_is_multicast (&t->dst))
{
/* Unicast tunnel -
* source the FIB entry for the tunnel's destination
* and become a child thereof. The tunnel will then get poked
* when the forwarding for the entry updates, and the tunnel can
* re-stack accordingly
*/
vtep_addr_ref (&t->src);
t->fib_entry_index = fib_table_entry_special_add
(t->encap_fib_index, &tun_dst_pfx, FIB_SOURCE_RR,
FIB_ENTRY_FLAG_NONE);
t->sibling_index = fib_entry_child_add
(t->fib_entry_index, gtm->fib_node_type, t - gtm->tunnels);
gtpu_tunnel_restack_dpo (t);
}
else
{
/* Multicast tunnel -
* as the same mcast group can be used for multiple mcast tunnels
* with different VNIs, create the output adjacency only if
* it does not already exist
*/
fib_protocol_t fp = fib_ip_proto (is_ip6);
if (vtep_addr_ref (&t->dst) == 1)
{
fib_node_index_t mfei;
adj_index_t ai;
fib_route_path_t path = {
.frp_proto = fib_proto_to_dpo (fp),
.frp_addr = zero_addr,
.frp_sw_if_index = 0xffffffff,
.frp_fib_index = ~0,
.frp_weight = 0,
.frp_flags = FIB_ROUTE_PATH_LOCAL,
};
const mfib_prefix_t mpfx = {
.fp_proto = fp,
.fp_len = (is_ip6 ? 128 : 32),
.fp_grp_addr = tun_dst_pfx.fp_addr,
};
/*
* Setup the (*,G) to receive traffic on the mcast group
* - the forwarding interface is for-us
* - the accepting interface is that from the API
*/
mfib_table_entry_path_update (t->encap_fib_index,
&mpfx,
MFIB_SOURCE_GTPU,
&path, MFIB_ITF_FLAG_FORWARD);
path.frp_sw_if_index = a->mcast_sw_if_index;
path.frp_flags = FIB_ROUTE_PATH_FLAG_NONE;
mfei = mfib_table_entry_path_update (t->encap_fib_index,
&mpfx,
MFIB_SOURCE_GTPU,
&path,
MFIB_ITF_FLAG_ACCEPT);
/*
* Create the mcast adjacency to send traffic to the group
*/
ai = adj_mcast_add_or_lock (fp,
fib_proto_to_link (fp),
a->mcast_sw_if_index);
/*
* create a new end-point
*/
mcast_shared_add (&t->dst, mfei, ai);
}
dpo_id_t dpo = DPO_INVALID;
mcast_shared_t ep = mcast_shared_get (&t->dst);
/* Stack shared mcast dst mac addr rewrite on encap */
dpo_set (&dpo, DPO_ADJACENCY_MCAST,
fib_proto_to_dpo (fp), ep.mcast_adj_index);
dpo_stack_from_node (encap_index, &t->next_dpo, &dpo);
dpo_reset (&dpo);
flood_class = VNET_FLOOD_CLASS_TUNNEL_MASTER;
}
vnet_get_sw_interface (vnet_get_main (), sw_if_index)->flood_class =
flood_class;
}
else
{
/* deleting a tunnel: tunnel must exist */
if (!p)
return VNET_API_ERROR_NO_SUCH_ENTRY;
t = pool_elt_at_index (gtm->tunnels, p[0]);
sw_if_index = t->sw_if_index;
vnet_sw_interface_set_flags (vnm, t->sw_if_index, 0 /* down */ );
vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, t->sw_if_index);
si->flags |= VNET_SW_INTERFACE_FLAG_HIDDEN;
/* make sure tunnel is removed from l2 bd or xconnect */
set_int_l2_mode (gtm->vlib_main, vnm, MODE_L3, t->sw_if_index, 0,
L2_BD_PORT_TYPE_NORMAL, 0, 0);
vec_add1 (gtm->free_gtpu_tunnel_hw_if_indices, t->hw_if_index);
gtm->tunnel_index_by_sw_if_index[t->sw_if_index] = ~0;
if (!is_ip6)
hash_unset (gtm->gtpu4_tunnel_by_key, key4.as_u64);
else
hash_unset_mem_free (&gtm->gtpu6_tunnel_by_key, &key6);
if (!ip46_address_is_multicast (&t->dst))
{
vtep_addr_unref (&t->src);
fib_entry_child_remove (t->fib_entry_index, t->sibling_index);
fib_table_entry_delete_index (t->fib_entry_index, FIB_SOURCE_RR);
}
else if (vtep_addr_unref (&t->dst) == 0)
{
mcast_shared_remove (&t->dst);
}
fib_node_deinit (&t->node);
vec_free (t->rewrite);
pool_put (gtm->tunnels, t);
}
if (sw_if_indexp)
*sw_if_indexp = sw_if_index;
if (a->is_add)
{
/* register udp ports */
if (!is_ip6 && !udp_is_valid_dst_port (UDP_DST_PORT_GTPU, 1))
udp_register_dst_port (gtm->vlib_main, UDP_DST_PORT_GTPU,
gtpu4_input_node.index, /* is_ip4 */ 1);
if (is_ip6 && !udp_is_valid_dst_port (UDP_DST_PORT_GTPU6, 0))
udp_register_dst_port (gtm->vlib_main, UDP_DST_PORT_GTPU6,
gtpu6_input_node.index, /* is_ip4 */ 0);
}
return 0;
}
static uword
get_decap_next_for_node (u32 node_index, u32 ipv4_set)
{
gtpu_main_t *gtm = &gtpu_main;
vlib_main_t *vm = gtm->vlib_main;
uword input_node = (ipv4_set) ? gtpu4_input_node.index :
gtpu6_input_node.index;
return vlib_node_add_next (vm, input_node, node_index);
}
static uword
unformat_decap_next (unformat_input_t * input, va_list * args)
{
u32 *result = va_arg (*args, u32 *);
u32 ipv4_set = va_arg (*args, int);
gtpu_main_t *gtm = &gtpu_main;
vlib_main_t *vm = gtm->vlib_main;
u32 node_index;
u32 tmp;
if (unformat (input, "l2"))
*result = GTPU_INPUT_NEXT_L2_INPUT;
else if (unformat (input, "ip4"))
*result = GTPU_INPUT_NEXT_IP4_INPUT;
else if (unformat (input, "ip6"))
*result = GTPU_INPUT_NEXT_IP6_INPUT;
else if (unformat (input, "node %U", unformat_vlib_node, vm, &node_index))
*result = get_decap_next_for_node (node_index, ipv4_set);
else if (unformat (input, "%d", &tmp))
*result = tmp;
else
return 0;
return 1;
}
static clib_error_t *
gtpu_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;
ip46_address_t src, dst;
u8 is_add = 1;
u8 src_set = 0;
u8 dst_set = 0;
u8 grp_set = 0;
u8 ipv4_set = 0;
u8 ipv6_set = 0;
u32 encap_fib_index = 0;
u32 mcast_sw_if_index = ~0;
u32 decap_next_index = GTPU_INPUT_NEXT_L2_INPUT;
u32 teid = 0;
u32 tmp;
int rv;
vnet_gtpu_add_del_tunnel_args_t _a, *a = &_a;
u32 tunnel_sw_if_index;
clib_error_t *error = NULL;
/* Cant "universally zero init" (={0}) due to GCC bug 53119 */
clib_memset (&src, 0, sizeof src);
clib_memset (&dst, 0, sizeof dst);
/* 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, "src %U",
unformat_ip4_address, &src.ip4))
{
src_set = 1;
ipv4_set = 1;
}
else if (unformat (line_input, "dst %U",
unformat_ip4_address, &dst.ip4))
{
dst_set = 1;
ipv4_set = 1;
}
else if (unformat (line_input, "src %U",
unformat_ip6_address, &src.ip6))
{
src_set = 1;
ipv6_set = 1;
}
else if (unformat (line_input, "dst %U",
unformat_ip6_address, &dst.ip6))
{
dst_set = 1;
ipv6_set = 1;
}
else if (unformat (line_input, "group %U %U",
unformat_ip4_address, &dst.ip4,
unformat_vnet_sw_interface,
vnet_get_main (), &mcast_sw_if_index))
{
grp_set = dst_set = 1;
ipv4_set = 1;
}
else if (unformat (line_input, "group %U %U",
unformat_ip6_address, &dst.ip6,
unformat_vnet_sw_interface,
vnet_get_main (), &mcast_sw_if_index))
{
grp_set = dst_set = 1;
ipv6_set = 1;
}
else if (unformat (line_input, "encap-vrf-id %d", &tmp))
{
encap_fib_index = fib_table_find (fib_ip_proto (ipv6_set), tmp);
if (encap_fib_index == ~0)
{
error =
clib_error_return (0, "nonexistent encap-vrf-id %d", tmp);
goto done;
}
}
else if (unformat (line_input, "decap-next %U", unformat_decap_next,
&decap_next_index, ipv4_set))
;
else if (unformat (line_input, "teid %d", &teid))
;
else
{
error = clib_error_return (0, "parse error: '%U'",
format_unformat_error, line_input);
goto done;
}
}
if (src_set == 0)
{
error = clib_error_return (0, "tunnel src address not specified");
goto done;
}
if (dst_set == 0)
{
error = clib_error_return (0, "tunnel dst address not specified");
goto done;
}
if (grp_set && !ip46_address_is_multicast (&dst))
{
error = clib_error_return (0, "tunnel group address not multicast");
goto done;
}
if (grp_set == 0 && ip46_address_is_multicast (&dst))
{
error = clib_error_return (0, "dst address must be unicast");
goto done;
}
if (grp_set && mcast_sw_if_index == ~0)
{
error = clib_error_return (0, "tunnel nonexistent multicast device");
goto done;
}
if (ipv4_set && ipv6_set)
{
error = clib_error_return (0, "both IPv4 and IPv6 addresses specified");
goto done;
}
if (ip46_address_cmp (&src, &dst) == 0)
{
error = clib_error_return (0, "src and dst addresses are identical");
goto done;
}
if (decap_next_index == ~0)
{
error = clib_error_return (0, "next node not found");
goto done;
}
clib_memset (a, 0, sizeof (*a));
a->is_add = is_add;
a->is_ip6 = ipv6_set;
#define _(x) a->x = x;
foreach_copy_field;
#undef _
rv = vnet_gtpu_add_del_tunnel (a, &tunnel_sw_if_index);
switch (rv)
{
case 0:
if (is_add)
vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name,
vnet_get_main (), tunnel_sw_if_index);
break;
case VNET_API_ERROR_TUNNEL_EXIST:
error = clib_error_return (0, "tunnel already exists...");
goto done;
case VNET_API_ERROR_NO_SUCH_ENTRY:
error = clib_error_return (0, "tunnel does not exist...");
goto done;
default:
error = clib_error_return
(0, "vnet_gtpu_add_del_tunnel returned %d", rv);
goto done;
}
done:
unformat_free (line_input);
return error;
}
/*?
* Add or delete a GTPU Tunnel.
*
* GTPU provides the features needed to allow L2 bridge domains (BDs)
* to span multiple servers. This is done by building an L2 overlay on
* top of an L3 network underlay using GTPU tunnels.
*
* This makes it possible for servers to be co-located in the same data
* center or be separated geographically as long as they are reachable
* through the underlay L3 network.
*
* You can refer to this kind of L2 overlay bridge domain as a GTPU
* (Virtual eXtensible VLAN) segment.
*
* @cliexpar
* Example of how to create a GTPU Tunnel:
* @cliexcmd{create gtpu tunnel src 10.0.3.1 dst 10.0.3.3 teid 13 encap-vrf-id 7}
* Example of how to delete a GTPU Tunnel:
* @cliexcmd{create gtpu tunnel src 10.0.3.1 dst 10.0.3.3 teid 13 del}
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (create_gtpu_tunnel_command, static) = {
.path = "create gtpu tunnel",
.short_help =
"create gtpu tunnel src <local-vtep-addr>"
" {dst <remote-vtep-addr>|group <mcast-vtep-addr> <intf-name>} teid <nn>"
" [encap-vrf-id <nn>] [decap-next [l2|ip4|ip6|node <name>]] [del]",
.function = gtpu_add_del_tunnel_command_fn,
};
/* *INDENT-ON* */
static clib_error_t *
show_gtpu_tunnel_command_fn (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
gtpu_main_t *gtm = &gtpu_main;
gtpu_tunnel_t *t;
if (pool_elts (gtm->tunnels) == 0)
vlib_cli_output (vm, "No gtpu tunnels configured...");
pool_foreach (t, gtm->tunnels, (
{
vlib_cli_output (vm, "%U",
format_gtpu_tunnel, t);
}
));
return 0;
}
/*?
* Display all the GTPU Tunnel entries.
*
* @cliexpar
* Example of how to display the GTPU Tunnel entries:
* @cliexstart{show gtpu tunnel}
* [0] src 10.0.3.1 dst 10.0.3.3 teid 13 encap_fib_index 0 sw_if_index 5 decap_next l2
* @cliexend
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (show_gtpu_tunnel_command, static) = {
.path = "show gtpu tunnel",
.short_help = "show gtpu tunnel",
.function = show_gtpu_tunnel_command_fn,
};
/* *INDENT-ON* */
void
vnet_int_gtpu_bypass_mode (u32 sw_if_index, u8 is_ip6, u8 is_enable)
{
if (is_ip6)
vnet_feature_enable_disable ("ip6-unicast", "ip6-gtpu-bypass",
sw_if_index, is_enable, 0, 0);
else
vnet_feature_enable_disable ("ip4-unicast", "ip4-gtpu-bypass",
sw_if_index, is_enable, 0, 0);
}
static clib_error_t *
set_ip_gtpu_bypass (u32 is_ip6,
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 ();
clib_error_t *error = 0;
u32 sw_if_index, is_enable;
sw_if_index = ~0;
is_enable = 1;
if (!unformat_user (input, unformat_line_input, line_input))
return 0;
while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
if (unformat_user
(line_input, unformat_vnet_sw_interface, vnm, &sw_if_index))
;
else if (unformat (line_input, "del"))
is_enable = 0;
else
{
error = unformat_parse_error (line_input);
goto done;
}
}
if (~0 == sw_if_index)
{
error = clib_error_return (0, "unknown interface `%U'",
format_unformat_error, line_input);
goto done;
}
vnet_int_gtpu_bypass_mode (sw_if_index, is_ip6, is_enable);
done:
unformat_free (line_input);
return error;
}
static clib_error_t *
set_ip4_gtpu_bypass (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
return set_ip_gtpu_bypass (0, input, cmd);
}
/*?
* This command adds the 'ip4-gtpu-bypass' graph node for a given interface.
* By adding the IPv4 gtpu-bypass graph node to an interface, the node checks
* for and validate input gtpu packet and bypass ip4-lookup, ip4-local,
* ip4-udp-lookup nodes to speedup gtpu packet forwarding. This node will
* cause extra overhead to for non-gtpu packets which is kept at a minimum.
*
* @cliexpar
* @parblock
* Example of graph node before ip4-gtpu-bypass is enabled:
* @cliexstart{show vlib graph ip4-gtpu-bypass}
* Name Next Previous
* ip4-gtpu-bypass error-drop [0]
* gtpu4-input [1]
* ip4-lookup [2]
* @cliexend
*
* Example of how to enable ip4-gtpu-bypass on an interface:
* @cliexcmd{set interface ip gtpu-bypass GigabitEthernet2/0/0}
*
* Example of graph node after ip4-gtpu-bypass is enabled:
* @cliexstart{show vlib graph ip4-gtpu-bypass}
* Name Next Previous
* ip4-gtpu-bypass error-drop [0] ip4-input
* gtpu4-input [1] ip4-input-no-checksum
* ip4-lookup [2]
* @cliexend
*
* Example of how to display the feature enabled on an interface:
* @cliexstart{show ip interface features GigabitEthernet2/0/0}
* IP feature paths configured on GigabitEthernet2/0/0...
* ...
* ipv4 unicast:
* ip4-gtpu-bypass
* ip4-lookup
* ...
* @cliexend
*
* Example of how to disable ip4-gtpu-bypass on an interface:
* @cliexcmd{set interface ip gtpu-bypass GigabitEthernet2/0/0 del}
* @endparblock
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (set_interface_ip_gtpu_bypass_command, static) = {
.path = "set interface ip gtpu-bypass",
.function = set_ip4_gtpu_bypass,
.short_help = "set interface ip gtpu-bypass <interface> [del]",
};
/* *INDENT-ON* */
static clib_error_t *
set_ip6_gtpu_bypass (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
return set_ip_gtpu_bypass (1, input, cmd);
}
/*?
* This command adds the 'ip6-gtpu-bypass' graph node for a given interface.
* By adding the IPv6 gtpu-bypass graph node to an interface, the node checks
* for and validate input gtpu packet and bypass ip6-lookup, ip6-local,
* ip6-udp-lookup nodes to speedup gtpu packet forwarding. This node will
* cause extra overhead to for non-gtpu packets which is kept at a minimum.
*
* @cliexpar
* @parblock
* Example of graph node before ip6-gtpu-bypass is enabled:
* @cliexstart{show vlib graph ip6-gtpu-bypass}
* Name Next Previous
* ip6-gtpu-bypass error-drop [0]
* gtpu6-input [1]
* ip6-lookup [2]
* @cliexend
*
* Example of how to enable ip6-gtpu-bypass on an interface:
* @cliexcmd{set interface ip6 gtpu-bypass GigabitEthernet2/0/0}
*
* Example of graph node after ip6-gtpu-bypass is enabled:
* @cliexstart{show vlib graph ip6-gtpu-bypass}
* Name Next Previous
* ip6-gtpu-bypass error-drop [0] ip6-input
* gtpu6-input [1] ip4-input-no-checksum
* ip6-lookup [2]
* @cliexend
*
* Example of how to display the feature enabled on an interface:
* @cliexstart{show ip interface features GigabitEthernet2/0/0}
* IP feature paths configured on GigabitEthernet2/0/0...
* ...
* ipv6 unicast:
* ip6-gtpu-bypass
* ip6-lookup
* ...
* @cliexend
*
* Example of how to disable ip6-gtpu-bypass on an interface:
* @cliexcmd{set interface ip6 gtpu-bypass GigabitEthernet2/0/0 del}
* @endparblock
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (set_interface_ip6_gtpu_bypass_command, static) = {
.path = "set interface ip6 gtpu-bypass",
.function = set_ip6_gtpu_bypass,
.short_help = "set interface ip gtpu-bypass <interface> [del]",
};
/* *INDENT-ON* */
clib_error_t *
gtpu_init (vlib_main_t * vm)
{
gtpu_main_t *gtm = &gtpu_main;
gtm->vnet_main = vnet_get_main ();
gtm->vlib_main = vm;
/* initialize the ip6 hash */
gtm->gtpu6_tunnel_by_key = hash_create_mem (0,
sizeof (gtpu6_tunnel_key_t),
sizeof (uword));
gtm->vtep6 = hash_create_mem (0, sizeof (ip6_address_t), sizeof (uword));
gtm->mcast_shared = hash_create_mem (0,
sizeof (ip46_address_t),
sizeof (mcast_shared_t));
gtm->fib_node_type = fib_node_register_new_type (&gtpu_vft);
return 0;
}
VLIB_INIT_FUNCTION (gtpu_init);
/* *INDENT-OFF* */
VLIB_PLUGIN_REGISTER () = {
.version = VPP_BUILD_VER,
.description = "GPRS Tunnelling Protocol, User Data (GTPv1-U)",
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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