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vpp/plugins/ila-plugin/ila/ila.c
Neale Ranns 948e00ff5e Support IETF routing Yang models (VPP-503). 
Add support for special routes to send ICMP unreachable or admin prohibited.

Change-Id: Ia1ac65b0e5e925c0f9ebc7824141833b4e18f05e
Signed-off-by: Neale Ranns <nranns@cisco.com>
2016-10-25 15:09:10 +00:00

1094 lines
28 KiB
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/*
* 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 <ila/ila.h>
#include <vnet/plugin/plugin.h>
#include <vnet/ip/lookup.h>
#include <vnet/dpo/dpo.h>
#include <vnet/fib/fib_table.h>
static ila_main_t ila_main;
#define ILA_TABLE_DEFAULT_HASH_NUM_BUCKETS (64 * 1024)
#define ILA_TABLE_DEFAULT_HASH_MEMORY_SIZE (32<<20)
#define foreach_ila_error \
_(NONE, "valid ILA packets")
typedef enum {
#define _(sym,str) ILA_ERROR_##sym,
foreach_ila_error
#undef _
ILA_N_ERROR,
} ila_error_t;
static char *ila_error_strings[] = {
#define _(sym,string) string,
foreach_ila_error
#undef _
};
typedef enum {
ILA_ILA2SIR_NEXT_DROP,
ILA_ILA2SIR_N_NEXT,
} ila_ila2sir_next_t;
typedef struct {
u32 ila_index;
ip6_address_t initial_dst;
u32 adj_index;
} ila_ila2sir_trace_t;
static ila_entry_t ila_sir2ila_default_entry = {
.csum_mode = ILA_CSUM_MODE_NO_ACTION,
.type = ILA_TYPE_IID,
.dir = ILA_DIR_ILA2SIR, //Will pass the packet with no
};
/**
* @brief Dynamically registered DPO Type for ILA
*/
static dpo_type_t ila_dpo_type;
/**
* @brief Dynamically registered FIB node type for ILA
*/
static fib_node_type_t ila_fib_node_type;
u8 *
format_half_ip6_address (u8 * s, va_list * va)
{
u64 v = clib_net_to_host_u64 (va_arg (*va, u64));
return format (s, "%04x:%04x:%04x:%04x",
v >> 48, (v >> 32) & 0xffff, (v >> 16) & 0xffff, v & 0xffff);
}
u8 *
format_ila_direction (u8 * s, va_list * args)
{
ila_direction_t t = va_arg (*args, ila_direction_t);
#define _(i,n,st) \
if (t == ILA_DIR_##i) \
return format(s, st);
ila_foreach_direction
#undef _
return format (s, "invalid_ila_direction");
}
static u8 *
format_csum_mode (u8 * s, va_list * va)
{
ila_csum_mode_t csum_mode = va_arg (*va, ila_csum_mode_t);
char *txt;
switch (csum_mode)
{
#define _(i,n,st) \
case ILA_CSUM_MODE_##i: \
txt = st; \
break;
ila_csum_foreach_type
#undef _
default:
txt = "invalid_ila_csum_mode";
break;
}
return format (s, txt);
}
u8 *
format_ila_type (u8 * s, va_list * args)
{
ila_type_t t = va_arg (*args, ila_type_t);
#define _(i,n,st) \
if (t == ILA_TYPE_##i) \
return format(s, st);
ila_foreach_type
#undef _
return format (s, "invalid_ila_type");
}
static u8 *
format_ila_entry (u8 * s, va_list * va)
{
vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
ila_entry_t *e = va_arg (*va, ila_entry_t *);
if (!e)
{
return format (s, "%-15s%=40s%=40s%+16s%+18s%+11s", "Type", "SIR Address",
"ILA Address", "Checksum Mode", "Direction", "Next DPO");
}
else if (vnm)
{
if (ip6_address_is_zero(&e->next_hop))
{
return format (s, "%-15U%=40U%=40U%18U%11U%s",
format_ila_type, e->type,
format_ip6_address, &e->sir_address,
format_ip6_address, &e->ila_address,
format_csum_mode, e->csum_mode,
format_ila_direction, e->dir,
"n/a");
}
else
{
return format (s, "%-15U%=40U%=40U%18U%11U%U",
format_ila_type, e->type,
format_ip6_address, &e->sir_address,
format_ip6_address, &e->ila_address,
format_csum_mode, e->csum_mode,
format_ila_direction, e->dir,
format_dpo_id, &e->ila_dpo, 0);
}
}
return NULL;
}
u8 *
format_ila_ila2sir_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 *);
ila_ila2sir_trace_t *t = va_arg (*args, ila_ila2sir_trace_t *);
return format (s,
"ILA -> SIR adj index: %d entry index: %d initial_dst: %U",
t->adj_index, t->ila_index, format_ip6_address,
&t->initial_dst);
}
static uword
unformat_ila_direction (unformat_input_t * input, va_list * args)
{
ila_direction_t *result = va_arg (*args, ila_direction_t *);
#define _(i,n,s) \
if (unformat(input, s)) \
{ \
*result = ILA_DIR_##i; \
return 1;\
}
ila_foreach_direction
#undef _
return 0;
}
static uword
unformat_ila_type (unformat_input_t * input, va_list * args)
{
ila_type_t *result = va_arg (*args, ila_type_t *);
#define _(i,n,s) \
if (unformat(input, s)) \
{ \
*result = ILA_TYPE_##i; \
return 1;\
}
ila_foreach_type
#undef _
return 0;
}
static uword
unformat_ila_csum_mode (unformat_input_t * input, va_list * args)
{
ila_csum_mode_t *result = va_arg (*args, ila_csum_mode_t *);
if (unformat (input, "none") || unformat (input, "no-action"))
{
*result = ILA_CSUM_MODE_NO_ACTION;
return 1;
}
if (unformat (input, "neutral-map"))
{
*result = ILA_CSUM_MODE_NEUTRAL_MAP;
return 1;
}
if (unformat (input, "adjust-transport"))
{
*result = ILA_CSUM_MODE_ADJUST_TRANSPORT;
return 1;
}
return 0;
}
static uword
unformat_half_ip6_address (unformat_input_t * input, va_list * args)
{
u64 *result = va_arg (*args, u64 *);
u32 a[4];
if (!unformat (input, "%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3]))
return 0;
if (a[0] > 0xFFFF || a[1] > 0xFFFF || a[2] > 0xFFFF || a[3] > 0xFFFF)
return 0;
*result = clib_host_to_net_u64 ((((u64) a[0]) << 48) |
(((u64) a[1]) << 32) |
(((u64) a[2]) << 16) | (((u64) a[3])));
return 1;
}
static vlib_node_registration_t ila_ila2sir_node;
static uword
ila_ila2sir (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
ila_main_t *ilm = &ila_main;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
while (n_left_from > 0)
{
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from >= 4 && n_left_to_next >= 2)
{
u32 pi0, pi1;
vlib_buffer_t *p0, *p1;
ila_entry_t *ie0, *ie1;
ip6_header_t *ip60, *ip61;
ip6_address_t *sir_address0, *sir_address1;
{
vlib_buffer_t *p2, *p3;
p2 = vlib_get_buffer (vm, from[2]);
p3 = vlib_get_buffer (vm, from[3]);
vlib_prefetch_buffer_header (p2, LOAD);
vlib_prefetch_buffer_header (p3, LOAD);
CLIB_PREFETCH (p2->data, sizeof (ip6_header_t), LOAD);
CLIB_PREFETCH (p3->data, sizeof (ip6_header_t), LOAD);
}
pi0 = to_next[0] = from[0];
pi1 = to_next[1] = from[1];
from += 2;
n_left_from -= 2;
to_next += 2;
n_left_to_next -= 2;
p0 = vlib_get_buffer (vm, pi0);
p1 = vlib_get_buffer (vm, pi1);
ip60 = vlib_buffer_get_current (p0);
ip61 = vlib_buffer_get_current (p1);
sir_address0 = &ip60->dst_address;
sir_address1 = &ip61->dst_address;
ie0 = pool_elt_at_index (ilm->entries,
vnet_buffer (p0)->ip.adj_index[VLIB_TX]);
ie1 = pool_elt_at_index (ilm->entries,
vnet_buffer (p1)->ip.adj_index[VLIB_TX]);
if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
{
ila_ila2sir_trace_t *tr =
vlib_add_trace (vm, node, p0, sizeof (*tr));
tr->ila_index = ie0 - ilm->entries;
tr->initial_dst = ip60->dst_address;
tr->adj_index = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
}
if (PREDICT_FALSE (p1->flags & VLIB_BUFFER_IS_TRACED))
{
ila_ila2sir_trace_t *tr =
vlib_add_trace (vm, node, p1, sizeof (*tr));
tr->ila_index = ie1 - ilm->entries;
tr->initial_dst = ip61->dst_address;
tr->adj_index = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
}
sir_address0 = (ie0->dir != ILA_DIR_SIR2ILA) ? &ie0->sir_address : sir_address0;
sir_address1 = (ie1->dir != ILA_DIR_SIR2ILA) ? &ie1->sir_address : sir_address1;
ip60->dst_address.as_u64[0] = sir_address0->as_u64[0];
ip60->dst_address.as_u64[1] = sir_address0->as_u64[1];
ip61->dst_address.as_u64[0] = sir_address1->as_u64[0];
ip61->dst_address.as_u64[1] = sir_address1->as_u64[1];
vnet_buffer (p0)->ip.adj_index[VLIB_TX] = ie0->ila_dpo.dpoi_index;
vnet_buffer (p1)->ip.adj_index[VLIB_TX] = ie1->ila_dpo.dpoi_index;
vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
n_left_to_next, pi0, pi1,
ie0->ila_dpo.dpoi_next_node,
ie1->ila_dpo.dpoi_next_node);
}
/* Single loop */
while (n_left_from > 0 && n_left_to_next > 0)
{
u32 pi0;
vlib_buffer_t *p0;
ila_entry_t *ie0;
ip6_header_t *ip60;
ip6_address_t *sir_address0;
pi0 = to_next[0] = from[0];
from += 1;
n_left_from -= 1;
to_next += 1;
n_left_to_next -= 1;
p0 = vlib_get_buffer (vm, pi0);
ip60 = vlib_buffer_get_current (p0);
sir_address0 = &ip60->dst_address;
ie0 = pool_elt_at_index (ilm->entries,
vnet_buffer (p0)->ip.adj_index[VLIB_TX]);
if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
{
ila_ila2sir_trace_t *tr =
vlib_add_trace (vm, node, p0, sizeof (*tr));
tr->ila_index = ie0 ? (ie0 - ilm->entries) : ~0;
tr->initial_dst = ip60->dst_address;
tr->adj_index = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
}
sir_address0 = (ie0->dir != ILA_DIR_SIR2ILA) ? &ie0->sir_address : sir_address0;
ip60->dst_address.as_u64[0] = sir_address0->as_u64[0];
ip60->dst_address.as_u64[1] = sir_address0->as_u64[1];
vnet_buffer (p0)->ip.adj_index[VLIB_TX] = ie0->ila_dpo.dpoi_index;
vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
n_left_to_next, pi0,
ie0->ila_dpo.dpoi_next_node);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
return frame->n_vectors;
}
/** *INDENT-OFF* */
VLIB_REGISTER_NODE (ila_ila2sir_node, static) =
{
.function = ila_ila2sir,
.name = "ila-to-sir",
.vector_size = sizeof (u32),
.format_trace = format_ila_ila2sir_trace,
.n_errors = ILA_N_ERROR,
.error_strings = ila_error_strings,
.n_next_nodes = ILA_ILA2SIR_N_NEXT,
.next_nodes =
{
[ILA_ILA2SIR_NEXT_DROP] = "error-drop"
},
};
/** *INDENT-ON* */
typedef enum
{
ILA_SIR2ILA_NEXT_DROP,
ILA_SIR2ILA_N_NEXT,
} ila_sir2ila_next_t;
typedef struct
{
u32 ila_index;
ip6_address_t initial_dst;
} ila_sir2ila_trace_t;
u8 *
format_ila_sir2ila_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 *);
ila_sir2ila_trace_t *t = va_arg (*args, ila_sir2ila_trace_t *);
return format (s, "SIR -> ILA entry index: %d initial_dst: %U",
t->ila_index, format_ip6_address, &t->initial_dst);
}
static vlib_node_registration_t ila_sir2ila_node;
static uword
ila_sir2ila (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
ip6_main_t *im = &ip6_main;
ip_lookup_main_t *lm = &im->lookup_main;
ip_config_main_t *cm = &lm->feature_config_mains[VNET_IP_RX_UNICAST_FEAT];
u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
ila_main_t *ilm = &ila_main;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
while (n_left_from > 0)
{
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from >= 4 && n_left_to_next >= 2)
{
u32 pi0, pi1;
vlib_buffer_t *p0, *p1;
ip6_header_t *ip60, *ip61;
u32 next0 = ILA_SIR2ILA_NEXT_DROP;
u32 next1 = ILA_SIR2ILA_NEXT_DROP;
BVT (clib_bihash_kv) kv0, value0;
BVT (clib_bihash_kv) kv1, value1;
ila_entry_t *ie0 = &ila_sir2ila_default_entry;
ila_entry_t *ie1 = &ila_sir2ila_default_entry;
ip6_address_t *ila_address0, *ila_address1;
{
vlib_buffer_t *p2, *p3;
p2 = vlib_get_buffer (vm, from[2]);
p3 = vlib_get_buffer (vm, from[3]);
vlib_prefetch_buffer_header (p2, LOAD);
vlib_prefetch_buffer_header (p3, LOAD);
CLIB_PREFETCH (p2->data, sizeof (ip6_header_t), LOAD);
CLIB_PREFETCH (p3->data, sizeof (ip6_header_t), LOAD);
}
pi0 = to_next[0] = from[0];
pi1 = to_next[1] = from[1];
from += 2;
n_left_from -= 2;
to_next += 2;
n_left_to_next -= 2;
p0 = vlib_get_buffer (vm, pi0);
p1 = vlib_get_buffer (vm, pi1);
ip60 = vlib_buffer_get_current (p0);
ip61 = vlib_buffer_get_current (p1);
ila_address0 = &ip60->dst_address;
ila_address1 = &ip61->dst_address;
kv0.key[0] = ip60->dst_address.as_u64[0];
kv0.key[1] = ip60->dst_address.as_u64[1];
kv0.key[2] = 0;
kv1.key[0] = ip61->dst_address.as_u64[0];
kv1.key[1] = ip61->dst_address.as_u64[1];
kv1.key[2] = 0;
if (PREDICT_TRUE((BV (clib_bihash_search)
(&ilm->id_to_entry_table, &kv0, &value0)) == 0)) {
ie0 = &ilm->entries[value0.value];
ila_address0 = (ie0->dir != ILA_DIR_ILA2SIR) ? &ie0->ila_address : ila_address0;
}
if ((BV (clib_bihash_search)
(&ilm->id_to_entry_table, &kv1, &value1)) == 0) {
ie1 = &ilm->entries[value1.value];
ila_address1 = (ie1->dir != ILA_DIR_ILA2SIR) ? &ie1->ila_address : ila_address1;
}
if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
{
ila_sir2ila_trace_t *tr =
vlib_add_trace (vm, node, p0, sizeof (*tr));
tr->ila_index =
(ie0 != &ila_sir2ila_default_entry) ? (ie0 - ilm->entries) : ~0;
tr->initial_dst = ip60->dst_address;
}
if (PREDICT_FALSE (p1->flags & VLIB_BUFFER_IS_TRACED))
{
ila_sir2ila_trace_t *tr =
vlib_add_trace (vm, node, p1, sizeof (*tr));
tr->ila_index =
(ie1 != &ila_sir2ila_default_entry) ? (ie1 - ilm->entries) : ~0;
tr->initial_dst = ip61->dst_address;
}
ip60->dst_address.as_u64[0] = ila_address0->as_u64[0];
ip60->dst_address.as_u64[1] = ila_address0->as_u64[1];
ip61->dst_address.as_u64[0] = ila_address1->as_u64[0];
ip61->dst_address.as_u64[1] = ila_address1->as_u64[1];
vnet_get_config_data (&cm->config_main,
&p0->current_config_index, &next0, 0);
vnet_get_config_data (&cm->config_main,
&p1->current_config_index, &next1, 0);
vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
n_left_to_next, pi0, pi1, next0,
next1);
}
/* Single loop */
while (n_left_from > 0 && n_left_to_next > 0)
{
u32 pi0;
vlib_buffer_t *p0;
ip6_header_t *ip60;
u32 next0 = ILA_SIR2ILA_NEXT_DROP;
BVT (clib_bihash_kv) kv0, value0;
ila_entry_t *ie0 = &ila_sir2ila_default_entry;
ip6_address_t *ila_address0;
pi0 = to_next[0] = from[0];
from += 1;
n_left_from -= 1;
to_next += 1;
n_left_to_next -= 1;
p0 = vlib_get_buffer (vm, pi0);
ip60 = vlib_buffer_get_current (p0);
ila_address0 = &ip60->dst_address;
kv0.key[0] = ip60->dst_address.as_u64[0];
kv0.key[1] = ip60->dst_address.as_u64[1];
kv0.key[2] = 0;
if (PREDICT_TRUE((BV (clib_bihash_search)
(&ilm->id_to_entry_table, &kv0, &value0)) == 0)) {
ie0 = &ilm->entries[value0.value];
ila_address0 = (ie0->dir != ILA_DIR_ILA2SIR) ? &ie0->ila_address : ila_address0;
}
if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
{
ila_sir2ila_trace_t *tr =
vlib_add_trace (vm, node, p0, sizeof (*tr));
tr->ila_index =
(ie0 != &ila_sir2ila_default_entry) ? (ie0 - ilm->entries) : ~0;
tr->initial_dst = ip60->dst_address;
}
//This operation should do everything for any type (except vnid4 obviously)
ip60->dst_address.as_u64[0] = ila_address0->as_u64[0];
ip60->dst_address.as_u64[1] = ila_address0->as_u64[1];
vnet_get_config_data (&cm->config_main,
&p0->current_config_index, &next0, 0);
vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
n_left_to_next, pi0, next0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
return frame->n_vectors;
}
/** *INDENT-OFF* */
VLIB_REGISTER_NODE (ila_sir2ila_node, static) =
{
.function = ila_sir2ila,.name = "sir-to-ila",
.vector_size = sizeof (u32),
.format_trace = format_ila_sir2ila_trace,
.n_errors = ILA_N_ERROR,
.error_strings = ila_error_strings,
.n_next_nodes = ILA_SIR2ILA_N_NEXT,
.next_nodes =
{
[ILA_SIR2ILA_NEXT_DROP] = "error-drop"
},
};
/** *INDENT-ON* */
/** *INDENT-OFF* */
VNET_IP6_UNICAST_FEATURE_INIT (ila_sir2ila, static) =
{
.node_name = "sir-to-ila",
.runs_before = ORDER_CONSTRAINTS{"ip6-lookup", 0},
.feature_index = &ila_main.ila_sir2ila_feature_index,
};
/** *INDENT-ON* */
static void
ila_entry_stack (ila_entry_t *ie)
{
/*
* restack on the next-hop's FIB entry
*/
dpo_stack(ila_dpo_type,
DPO_PROTO_IP6,
&ie->ila_dpo,
fib_entry_contribute_ip_forwarding(
ie->next_hop_fib_entry_index));
}
int
ila_add_del_entry (ila_add_del_entry_args_t * args)
{
ila_main_t *ilm = &ila_main;
BVT (clib_bihash_kv) kv, value;
//Sanity check
if (args->type == ILA_TYPE_IID || args->type == ILA_TYPE_LUID)
{
if ((args->sir_address.as_u8[8] >> 5) != args->type)
{
clib_warning ("Incorrect SIR address (ILA type mismatch %d %d)",
args->sir_address.as_u8[8] >> 1, args->type);
return -1;
}
if (args->sir_address.as_u8[8] & 0x10)
{
clib_warning ("Checksum bit should not be set in SIR address");
return -1;
}
}
else if (args->type == ILA_TYPE_VNIDM)
{
if (args->sir_address.as_u8[0] != 0xff ||
(args->sir_address.as_u8[1] & 0xf0) != 0xf0)
{
clib_warning ("SIR multicast address must start with fff");
return -1;
}
if (args->sir_address.as_u16[1] || args->sir_address.as_u16[2] ||
args->sir_address.as_u16[3] || args->sir_address.as_u16[4] ||
args->sir_address.as_u16[5] || (args->sir_address.as_u8[12] & 0xf0))
{
clib_warning ("SIR multicast address must start with fff");
return -1;
}
}
if (!args->is_del)
{
ila_entry_t *e;
pool_get (ilm->entries, e);
e->type = args->type;
e->sir_address = args->sir_address;
e->next_hop = args->next_hop_address;
e->csum_mode = args->csum_mode;
e->dir = args->dir;
//Construct ILA address
switch (e->type)
{
case ILA_TYPE_IID:
e->ila_address = e->sir_address;
break;
case ILA_TYPE_LUID:
e->ila_address.as_u64[0] = args->locator;
e->ila_address.as_u64[1] = args->sir_address.as_u64[1];
break;
case ILA_TYPE_VNID6:
e->ila_address.as_u64[0] = args->locator;
e->ila_address.as_u8[8] = (ILA_TYPE_VNID6 << 1);
e->ila_address.as_u32[2] |= args->vnid;
e->ila_address.as_u32[3] = args->sir_address.as_u32[3];
break;
case ILA_TYPE_VNIDM:
e->ila_address.as_u64[0] = args->locator;
e->ila_address.as_u8[8] = (ILA_TYPE_VNIDM << 1);
e->ila_address.as_u32[2] |= args->vnid;
e->ila_address.as_u32[3] = args->sir_address.as_u32[3];
e->ila_address.as_u8[12] |= args->sir_address.as_u8[2] << 4;
break;
case ILA_TYPE_VNID4:
clib_warning ("ILA type '%U' is not supported", format_ila_type,
e->type);
return -1;
}
//Modify ILA checksum if necessary
if (e->csum_mode == ILA_CSUM_MODE_NEUTRAL_MAP)
{
ip_csum_t csum = e->ila_address.as_u16[7];
int i;
for (i = 0; i < 4; i++)
{
csum = ip_csum_sub_even (csum, e->sir_address.as_u32[i]);
csum = ip_csum_add_even (csum, e->ila_address.as_u32[i]);
}
csum = ip_csum_add_even (csum, clib_host_to_net_u16 (0x1000));
e->ila_address.as_u16[7] = ip_csum_fold (csum);
e->ila_address.as_u8[8] |= 0x10;
}
//Create entry with the sir address
kv.key[0] = e->sir_address.as_u64[0];
kv.key[1] = e->sir_address.as_u64[1];
kv.key[2] = 0;
kv.value = e - ilm->entries;
BV (clib_bihash_add_del) (&ilm->id_to_entry_table, &kv,
1 /* is_add */ );
if (!ip6_address_is_zero(&e->next_hop))
{
/*
* become a child of the FIB netry for the next-hop
* so we are informed when its forwarding changes
*/
fib_prefix_t next_hop = {
.fp_addr = {
.ip6 = e->next_hop,
},
.fp_len = 128,
.fp_proto = FIB_PROTOCOL_IP6,
};
e->next_hop_fib_entry_index =
fib_table_entry_special_add(0,
&next_hop,
FIB_SOURCE_RR,
FIB_ENTRY_FLAG_NONE,
ADJ_INDEX_INVALID);
e->next_hop_child_index =
fib_entry_child_add(e->next_hop_fib_entry_index,
ila_fib_node_type,
e - ilm->entries);
/*
* Create a route that results in the ILA entry
*/
dpo_id_t dpo = DPO_INVALID;
fib_prefix_t pfx = {
.fp_addr = {
.ip6 = e->ila_address,
},
.fp_len = 128,
.fp_proto = FIB_PROTOCOL_IP6,
};
dpo_set(&dpo, ila_dpo_type, DPO_PROTO_IP6, e - ilm->entries);
fib_table_entry_special_dpo_add(0,
&pfx,
FIB_SOURCE_PLUGIN_HI,
FIB_ENTRY_FLAG_EXCLUSIVE,
&dpo);
dpo_reset(&dpo);
/*
* finally stack the ILA entry so it will forward to the next-hop
*/
ila_entry_stack (e);
}
}
else
{
ila_entry_t *e;
kv.key[0] = args->sir_address.as_u64[0];
kv.key[1] = args->sir_address.as_u64[1];
kv.key[2] = 0;
if ((BV (clib_bihash_search) (&ilm->id_to_entry_table, &kv, &value) <
0))
{
return -1;
}
e = &ilm->entries[value.value];
if (!ip6_address_is_zero(&e->next_hop))
{
fib_prefix_t pfx = {
.fp_addr = {
.ip6 = e->ila_address,
},
.fp_len = 128,
.fp_proto = FIB_PROTOCOL_IP6,
};
fib_table_entry_special_remove(0, &pfx, FIB_SOURCE_PLUGIN_HI);
/*
* remove this ILA entry as child of the FIB netry for the next-hop
*/
fib_entry_child_remove(e->next_hop_fib_entry_index,
e->next_hop_child_index);
fib_table_entry_delete_index(e->next_hop_fib_entry_index,
FIB_SOURCE_RR);
e->next_hop_fib_entry_index = FIB_NODE_INDEX_INVALID;
}
dpo_reset (&e->ila_dpo);
BV (clib_bihash_add_del) (&ilm->id_to_entry_table, &kv,
0 /* is_add */ );
pool_put (ilm->entries, e);
}
return 0;
}
int
ila_interface (u32 sw_if_index, u8 disable)
{
vlib_main_t *vm = vlib_get_main ();
ila_main_t *ilm = &ila_main;
ip6_main_t *im = &ip6_main;
ip_lookup_main_t *lm = &im->lookup_main;
ip_config_main_t *cm = &lm->feature_config_mains[VNET_IP_RX_UNICAST_FEAT];
vnet_config_main_t *vcm = &cm->config_main;
u32 ci, feature_index;
vec_validate_init_empty (cm->config_index_by_sw_if_index, sw_if_index, ~0);
ci = cm->config_index_by_sw_if_index[sw_if_index];
feature_index = ilm->ila_sir2ila_feature_index;
ci = ((disable) ? vnet_config_del_feature : vnet_config_add_feature)
(vm, vcm, ci, feature_index,
/* config data */ 0,
/* # bytes of config data */ 0);
cm->config_index_by_sw_if_index[sw_if_index] = ci;
return 0;
}
clib_error_t *
vlib_plugin_register (vlib_main_t * vm, vnet_plugin_handoff_t * h,
int from_early_init)
{
clib_error_t *error = 0;
return error;
}
u8 *format_ila_dpo (u8 * s, va_list * va)
{
index_t index = va_arg (*va, index_t);
CLIB_UNUSED(u32 indent) = va_arg (*va, u32);
ila_main_t *ilm = &ila_main;
ila_entry_t *ie = pool_elt_at_index (ilm->entries, index);
return format(s, "ILA: idx:%d sir:%U",
index,
format_ip6_address, &ie->sir_address);
}
/**
* @brief no-op lock function.
* The lifetime of the ILA entry is managed by the control plane
*/
static void
ila_dpo_lock (dpo_id_t *dpo)
{
}
/**
* @brief no-op unlock function.
* The lifetime of the ILA entry is managed by the control plane
*/
static void
ila_dpo_unlock (dpo_id_t *dpo)
{
}
const static dpo_vft_t ila_vft = {
.dv_lock = ila_dpo_lock,
.dv_unlock = ila_dpo_unlock,
.dv_format = format_ila_dpo,
};
const static char* const ila_ip6_nodes[] =
{
"ila-to-sir",
NULL,
};
const static char* const * const ila_nodes[DPO_PROTO_NUM] =
{
[DPO_PROTO_IP6] = ila_ip6_nodes,
};
static fib_node_t *
ila_fib_node_get_node (fib_node_index_t index)
{
ila_main_t *ilm = &ila_main;
ila_entry_t *ie = pool_elt_at_index (ilm->entries, index);
return (&ie->ila_fib_node);
}
/**
* @brief no-op unlock function.
* The lifetime of the ILA entry is managed by the control plane
*/
static void
ila_fib_node_last_lock_gone (fib_node_t *node)
{
}
static ila_entry_t *
ila_entry_from_fib_node (fib_node_t *node)
{
return ((ila_entry_t*)(((char*)node) -
STRUCT_OFFSET_OF(ila_entry_t, ila_fib_node)));
}
/**
* @brief
* Callback function invoked when the forwarding changes for the ILA next-hop
*/
static fib_node_back_walk_rc_t
ila_fib_node_back_walk_notify (fib_node_t *node,
fib_node_back_walk_ctx_t *ctx)
{
ila_entry_stack(ila_entry_from_fib_node(node));
return (FIB_NODE_BACK_WALK_CONTINUE);
}
/*
* ILA's FIB graph node virtual function table
*/
static const fib_node_vft_t ila_fib_node_vft = {
.fnv_get = ila_fib_node_get_node,
.fnv_last_lock = ila_fib_node_last_lock_gone,
.fnv_back_walk = ila_fib_node_back_walk_notify,
};
clib_error_t *
ila_init (vlib_main_t * vm)
{
ila_main_t *ilm = &ila_main;
ilm->entries = NULL;
ilm->lookup_table_nbuckets = ILA_TABLE_DEFAULT_HASH_NUM_BUCKETS;
ilm->lookup_table_nbuckets = 1 << max_log2 (ilm->lookup_table_nbuckets);
ilm->lookup_table_size = ILA_TABLE_DEFAULT_HASH_MEMORY_SIZE;
BV (clib_bihash_init) (&ilm->id_to_entry_table,
"ila id to entry index table",
ilm->lookup_table_nbuckets, ilm->lookup_table_size);
ila_dpo_type = dpo_register_new_type(&ila_vft, ila_nodes);
ila_fib_node_type = fib_node_register_new_type(&ila_fib_node_vft);
return NULL;
}
VLIB_INIT_FUNCTION (ila_init);
static clib_error_t *
ila_entry_command_fn (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
unformat_input_t _line_input, *line_input = &_line_input;
ila_add_del_entry_args_t args = { 0 };
u8 next_hop_set = 0;
int ret;
args.type = ILA_TYPE_IID;
args.csum_mode = ILA_CSUM_MODE_NO_ACTION;
args.local_adj_index = ~0;
args.dir = ILA_DIR_BIDIR;
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, "type %U", unformat_ila_type, &args.type))
;
else if (unformat
(line_input, "sir-address %U", unformat_ip6_address,
&args.sir_address))
;
else if (unformat
(line_input, "locator %U", unformat_half_ip6_address,
&args.locator))
;
else if (unformat
(line_input, "csum-mode %U", unformat_ila_csum_mode,
&args.csum_mode))
;
else if (unformat (line_input, "vnid %x", &args.vnid))
;
else if (unformat
(line_input, "next-hop %U", unformat_ip6_address,
&args.next_hop_address))
;
else if (unformat
(line_input, "direction %U", unformat_ila_direction, &args.dir))
next_hop_set = 1;
else if (unformat (line_input, "del"))
args.is_del = 1;
else
return clib_error_return (0, "parse error: '%U'",
format_unformat_error, line_input);
}
unformat_free (line_input);
if (!next_hop_set)
return clib_error_return (0, "Specified a next hop");
if ((ret = ila_add_del_entry (&args)))
return clib_error_return (0, "ila_add_del_entry returned error %d", ret);
return NULL;
}
VLIB_CLI_COMMAND (ila_entry_command, static) =
{
.path = "ila entry",
.short_help = "ila entry [type <type>] [sir-address <address>] [locator <locator>] [vnid <hex-vnid>]"
" [adj-index <adj-index>] [next-hop <next-hop>] [direction (bidir|sir2ila|ila2sir)]"
" [csum-mode (no-action|neutral-map|transport-adjust)] [del]",
.function = ila_entry_command_fn,
};
static clib_error_t *
ila_interface_command_fn (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
vnet_main_t *vnm = vnet_get_main ();
u32 sw_if_index = ~0;
u8 disable = 0;
if (!unformat (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index))
{
return clib_error_return (0, "Invalid interface name");
}
if (unformat (input, "disable"))
{
disable = 1;
}
int ret;
if ((ret = ila_interface (sw_if_index, disable)))
return clib_error_return (0, "ila_interface returned error %d", ret);
return NULL;
}
VLIB_CLI_COMMAND (ila_interface_command, static) =
{
.path = "ila interface",
.short_help = "ila interface <interface-name> [disable]",
.function = ila_interface_command_fn,
};
static clib_error_t *
ila_show_entries_command_fn (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
vnet_main_t *vnm = vnet_get_main ();
ila_main_t *ilm = &ila_main;
ila_entry_t *e;
vlib_cli_output (vm, " %U\n", format_ila_entry, vnm, NULL);
pool_foreach (e, ilm->entries,
({
vlib_cli_output (vm, " %U\n", format_ila_entry, vnm, e);
}));
return NULL;
}
VLIB_CLI_COMMAND (ila_show_entries_command, static) =
{
.path = "show ila entries",
.short_help = "show ila entries",
.function = ila_show_entries_command_fn,
};
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