ligang/vpp
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
20e555155d9a707be05f7b4e3ee78f3f14820fc8
vpp/vnet/vnet/map/ip4_map.c
Damjan Marion 607de1a063 Coding standards cleanup - remove trailing whitespace, fixes VPP-332 
Change-Id: I649a17f8fa47599faf438b2e596f53761790d10c
Signed-off-by: Damjan Marion <damarion@cisco.com>
2016-08-17 00:52:57 +00:00

814 lines
22 KiB
C
Raw Blame History

/*
* 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.
*/
/*
* Defines used for testing various optimisation schemes
*/
#define MAP_ENCAP_DUAL 0
#include "map.h"
#include "../ip/ip_frag.h"
vlib_node_registration_t ip4_map_reass_node;
enum ip4_map_next_e
{
IP4_MAP_NEXT_IP6_LOOKUP,
#ifdef MAP_SKIP_IP6_LOOKUP
IP4_MAP_NEXT_IP6_REWRITE,
#endif
IP4_MAP_NEXT_IP4_FRAGMENT,
IP4_MAP_NEXT_IP6_FRAGMENT,
IP4_MAP_NEXT_REASS,
IP4_MAP_NEXT_ICMP_ERROR,
IP4_MAP_NEXT_DROP,
IP4_MAP_N_NEXT,
};
enum ip4_map_reass_next_t
{
IP4_MAP_REASS_NEXT_IP6_LOOKUP,
IP4_MAP_REASS_NEXT_IP4_FRAGMENT,
IP4_MAP_REASS_NEXT_DROP,
IP4_MAP_REASS_N_NEXT,
};
typedef struct
{
u32 map_domain_index;
u16 port;
u8 cached;
} map_ip4_map_reass_trace_t;
u8 *
format_ip4_map_reass_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 *);
map_ip4_map_reass_trace_t *t = va_arg (*args, map_ip4_map_reass_trace_t *);
return format (s, "MAP domain index: %d L4 port: %u Status: %s",
t->map_domain_index, t->port,
t->cached ? "cached" : "forwarded");
}
/*
* ip4_map_get_port
*/
u16
ip4_map_get_port (ip4_header_t * ip, map_dir_e dir)
{
/* Find port information */
if (PREDICT_TRUE ((ip->protocol == IP_PROTOCOL_TCP) ||
(ip->protocol == IP_PROTOCOL_UDP)))
{
udp_header_t *udp = (void *) (ip + 1);
return (dir == MAP_SENDER ? udp->src_port : udp->dst_port);
}
else if (ip->protocol == IP_PROTOCOL_ICMP)
{
/*
* 1) ICMP Echo request or Echo reply
* 2) ICMP Error with inner packet being UDP or TCP
* 3) ICMP Error with inner packet being ICMP Echo request or Echo reply
*/
icmp46_header_t *icmp = (void *) (ip + 1);
if (icmp->type == ICMP4_echo_request || icmp->type == ICMP4_echo_reply)
{
return *((u16 *) (icmp + 1));
}
else if (clib_net_to_host_u16 (ip->length) >= 56)
{ // IP + ICMP + IP + L4 header
ip4_header_t *icmp_ip = (ip4_header_t *) (icmp + 2);
if (PREDICT_TRUE ((icmp_ip->protocol == IP_PROTOCOL_TCP) ||
(icmp_ip->protocol == IP_PROTOCOL_UDP)))
{
udp_header_t *udp = (void *) (icmp_ip + 1);
return (dir == MAP_SENDER ? udp->dst_port : udp->src_port);
}
else if (icmp_ip->protocol == IP_PROTOCOL_ICMP)
{
icmp46_header_t *inner_icmp = (void *) (icmp_ip + 1);
if (inner_icmp->type == ICMP4_echo_request
|| inner_icmp->type == ICMP4_echo_reply)
return (*((u16 *) (inner_icmp + 1)));
}
}
}
return (0);
}
static_always_inline u16
ip4_map_port_and_security_check (map_domain_t * d, ip4_header_t * ip,
u32 * next, u8 * error)
{
u16 port = 0;
if (d->psid_length > 0)
{
if (ip4_get_fragment_offset (ip) == 0)
{
if (PREDICT_FALSE
((ip->ip_version_and_header_length != 0x45)
|| clib_host_to_net_u16 (ip->length) < 28))
{
return 0;
}
port = ip4_map_get_port (ip, MAP_RECEIVER);
if (port)
{
/* Verify that port is not among the well-known ports */
if ((d->psid_offset > 0)
&& (clib_net_to_host_u16 (port) <
(0x1 << (16 - d->psid_offset))))
{
*error = MAP_ERROR_ENCAP_SEC_CHECK;
}
else
{
if (ip4_get_fragment_more (ip))
*next = IP4_MAP_NEXT_REASS;
return (port);
}
}
else
{
*error = MAP_ERROR_BAD_PROTOCOL;
}
}
else
{
*next = IP4_MAP_NEXT_REASS;
}
}
return (0);
}
/*
* ip4_map_vtcfl
*/
static_always_inline u32
ip4_map_vtcfl (ip4_header_t * ip4, vlib_buffer_t * p)
{
map_main_t *mm = &map_main;
u8 tc = mm->tc_copy ? ip4->tos : mm->tc;
u32 vtcfl = 0x6 << 28;
vtcfl |= tc << 20;
vtcfl |= vnet_buffer (p)->ip.flow_hash & 0x000fffff;
return (clib_host_to_net_u32 (vtcfl));
}
static_always_inline bool
ip4_map_ip6_lookup_bypass (vlib_buffer_t * p0, ip4_header_t * ip)
{
#ifdef MAP_SKIP_IP6_LOOKUP
map_main_t *mm = &map_main;
u32 adj_index0 = mm->adj6_index;
if (adj_index0 > 0)
{
ip_lookup_main_t *lm6 = &ip6_main.lookup_main;
ip_adjacency_t *adj = ip_get_adjacency (lm6, mm->adj6_index);
if (adj->n_adj > 1)
{
u32 hash_c0 = ip4_compute_flow_hash (ip, IP_FLOW_HASH_DEFAULT);
adj_index0 += (hash_c0 & (adj->n_adj - 1));
}
vnet_buffer (p0)->ip.adj_index[VLIB_TX] = adj_index0;
return (true);
}
#endif
return (false);
}
/*
* ip4_map_ttl
*/
static inline void
ip4_map_decrement_ttl (ip4_header_t * ip, u8 * error)
{
i32 ttl = ip->ttl;
/* Input node should have reject packets with ttl 0. */
ASSERT (ip->ttl > 0);
u32 checksum = ip->checksum + clib_host_to_net_u16 (0x0100);
checksum += checksum >= 0xffff;
ip->checksum = checksum;
ttl -= 1;
ip->ttl = ttl;
*error = ttl <= 0 ? IP4_ERROR_TIME_EXPIRED : *error;
/* Verify checksum. */
ASSERT (ip->checksum == ip4_header_checksum (ip));
}
static u32
ip4_map_fragment (vlib_buffer_t * b, u16 mtu, bool df, u8 * error)
{
map_main_t *mm = &map_main;
if (mm->frag_inner)
{
ip_frag_set_vnet_buffer (b, sizeof (ip6_header_t), mtu,
IP4_FRAG_NEXT_IP6_LOOKUP,
IP_FRAG_FLAG_IP6_HEADER);
return (IP4_MAP_NEXT_IP4_FRAGMENT);
}
else
{
if (df && !mm->frag_ignore_df)
{
icmp4_error_set_vnet_buffer (b, ICMP4_destination_unreachable,
ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set,
mtu);
vlib_buffer_advance (b, sizeof (ip6_header_t));
*error = MAP_ERROR_DF_SET;
return (IP4_MAP_NEXT_ICMP_ERROR);
}
ip_frag_set_vnet_buffer (b, 0, mtu, IP6_FRAG_NEXT_IP6_LOOKUP,
IP_FRAG_FLAG_IP6_HEADER);
return (IP4_MAP_NEXT_IP6_FRAGMENT);
}
}
/*
* ip4_map
*/
static uword
ip4_map (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;
vlib_node_runtime_t *error_node =
vlib_node_get_runtime (vm, ip4_map_node.index);
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
map_main_t *mm = &map_main;
vlib_combined_counter_main_t *cm = mm->domain_counters;
u32 cpu_index = os_get_cpu_number ();
while (n_left_from > 0)
{
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
/* Dual loop */
while (n_left_from >= 4 && n_left_to_next >= 2)
{
u32 pi0, pi1;
vlib_buffer_t *p0, *p1;
map_domain_t *d0, *d1;
u8 error0 = MAP_ERROR_NONE, error1 = MAP_ERROR_NONE;
ip4_header_t *ip40, *ip41;
u16 port0 = 0, port1 = 0;
ip6_header_t *ip6h0, *ip6h1;
u32 map_domain_index0 = ~0, map_domain_index1 = ~0;
u32 next0 = IP4_MAP_NEXT_IP6_LOOKUP, next1 =
IP4_MAP_NEXT_IP6_LOOKUP;
/* Prefetch next iteration. */
{
vlib_buffer_t *p2, *p3;
p2 = vlib_get_buffer (vm, from[2]);
p3 = vlib_get_buffer (vm, from[3]);
vlib_prefetch_buffer_header (p2, STORE);
vlib_prefetch_buffer_header (p3, STORE);
/* IPv4 + 8 = 28. possibly plus -40 */
CLIB_PREFETCH (p2->data - 40, 68, STORE);
CLIB_PREFETCH (p3->data - 40, 68, STORE);
}
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);
ip40 = vlib_buffer_get_current (p0);
ip41 = vlib_buffer_get_current (p1);
d0 =
ip4_map_get_domain (vnet_buffer (p0)->ip.adj_index[VLIB_TX],
&map_domain_index0);
d1 =
ip4_map_get_domain (vnet_buffer (p1)->ip.adj_index[VLIB_TX],
&map_domain_index1);
ASSERT (d0);
ASSERT (d1);
/*
* Shared IPv4 address
*/
port0 = ip4_map_port_and_security_check (d0, ip40, &next0, &error0);
port1 = ip4_map_port_and_security_check (d1, ip41, &next1, &error1);
/* Decrement IPv4 TTL */
ip4_map_decrement_ttl (ip40, &error0);
ip4_map_decrement_ttl (ip41, &error1);
bool df0 =
ip40->flags_and_fragment_offset &
clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT);
bool df1 =
ip41->flags_and_fragment_offset &
clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT);
/* MAP calc */
u32 da40 = clib_net_to_host_u32 (ip40->dst_address.as_u32);
u32 da41 = clib_net_to_host_u32 (ip41->dst_address.as_u32);
u16 dp40 = clib_net_to_host_u16 (port0);
u16 dp41 = clib_net_to_host_u16 (port1);
u64 dal60 = map_get_pfx (d0, da40, dp40);
u64 dal61 = map_get_pfx (d1, da41, dp41);
u64 dar60 = map_get_sfx (d0, da40, dp40);
u64 dar61 = map_get_sfx (d1, da41, dp41);
if (dal60 == 0 && dar60 == 0 && error0 == MAP_ERROR_NONE
&& next0 != IP4_MAP_NEXT_REASS)
error0 = MAP_ERROR_NO_BINDING;
if (dal61 == 0 && dar61 == 0 && error1 == MAP_ERROR_NONE
&& next1 != IP4_MAP_NEXT_REASS)
error1 = MAP_ERROR_NO_BINDING;
/* construct ipv6 header */
vlib_buffer_advance (p0, -sizeof (ip6_header_t));
vlib_buffer_advance (p1, -sizeof (ip6_header_t));
ip6h0 = vlib_buffer_get_current (p0);
ip6h1 = vlib_buffer_get_current (p1);
vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
ip6h0->ip_version_traffic_class_and_flow_label =
ip4_map_vtcfl (ip40, p0);
ip6h1->ip_version_traffic_class_and_flow_label =
ip4_map_vtcfl (ip41, p1);
ip6h0->payload_length = ip40->length;
ip6h1->payload_length = ip41->length;
ip6h0->protocol = IP_PROTOCOL_IP_IN_IP;
ip6h1->protocol = IP_PROTOCOL_IP_IN_IP;
ip6h0->hop_limit = 0x40;
ip6h1->hop_limit = 0x40;
ip6h0->src_address = d0->ip6_src;
ip6h1->src_address = d1->ip6_src;
ip6h0->dst_address.as_u64[0] = clib_host_to_net_u64 (dal60);
ip6h0->dst_address.as_u64[1] = clib_host_to_net_u64 (dar60);
ip6h1->dst_address.as_u64[0] = clib_host_to_net_u64 (dal61);
ip6h1->dst_address.as_u64[1] = clib_host_to_net_u64 (dar61);
/*
* Determine next node. Can be one of:
* ip6-lookup, ip6-rewrite, ip4-fragment, ip4-virtreass, error-drop
*/
if (PREDICT_TRUE (error0 == MAP_ERROR_NONE))
{
if (PREDICT_FALSE
(d0->mtu
&& (clib_net_to_host_u16 (ip6h0->payload_length) +
sizeof (*ip6h0) > d0->mtu)))
{
next0 = ip4_map_fragment (p0, d0->mtu, df0, &error0);
}
else
{
next0 =
ip4_map_ip6_lookup_bypass (p0,
ip40) ?
IP4_MAP_NEXT_IP6_REWRITE : next0;
vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_TX,
cpu_index,
map_domain_index0, 1,
clib_net_to_host_u16
(ip6h0->payload_length) +
40);
}
}
else
{
next0 = IP4_MAP_NEXT_DROP;
}
/*
* Determine next node. Can be one of:
* ip6-lookup, ip6-rewrite, ip4-fragment, ip4-virtreass, error-drop
*/
if (PREDICT_TRUE (error1 == MAP_ERROR_NONE))
{
if (PREDICT_FALSE
(d1->mtu
&& (clib_net_to_host_u16 (ip6h1->payload_length) +
sizeof (*ip6h1) > d1->mtu)))
{
next1 = ip4_map_fragment (p1, d1->mtu, df1, &error1);
}
else
{
next1 =
ip4_map_ip6_lookup_bypass (p1,
ip41) ?
IP4_MAP_NEXT_IP6_REWRITE : next1;
vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_TX,
cpu_index,
map_domain_index1, 1,
clib_net_to_host_u16
(ip6h1->payload_length) +
40);
}
}
else
{
next1 = IP4_MAP_NEXT_DROP;
}
if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
{
map_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof (*tr));
tr->map_domain_index = map_domain_index0;
tr->port = port0;
}
if (PREDICT_FALSE (p1->flags & VLIB_BUFFER_IS_TRACED))
{
map_trace_t *tr = vlib_add_trace (vm, node, p1, sizeof (*tr));
tr->map_domain_index = map_domain_index1;
tr->port = port1;
}
p0->error = error_node->errors[error0];
p1->error = error_node->errors[error1];
vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
n_left_to_next, pi0, pi1, next0,
next1);
}
while (n_left_from > 0 && n_left_to_next > 0)
{
u32 pi0;
vlib_buffer_t *p0;
map_domain_t *d0;
u8 error0 = MAP_ERROR_NONE;
ip4_header_t *ip40;
u16 port0 = 0;
ip6_header_t *ip6h0;
u32 next0 = IP4_MAP_NEXT_IP6_LOOKUP;
u32 map_domain_index0 = ~0;
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);
ip40 = vlib_buffer_get_current (p0);
d0 =
ip4_map_get_domain (vnet_buffer (p0)->ip.adj_index[VLIB_TX],
&map_domain_index0);
ASSERT (d0);
/*
* Shared IPv4 address
*/
port0 = ip4_map_port_and_security_check (d0, ip40, &next0, &error0);
/* Decrement IPv4 TTL */
ip4_map_decrement_ttl (ip40, &error0);
bool df0 =
ip40->flags_and_fragment_offset &
clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT);
/* MAP calc */
u32 da40 = clib_net_to_host_u32 (ip40->dst_address.as_u32);
u16 dp40 = clib_net_to_host_u16 (port0);
u64 dal60 = map_get_pfx (d0, da40, dp40);
u64 dar60 = map_get_sfx (d0, da40, dp40);
if (dal60 == 0 && dar60 == 0 && error0 == MAP_ERROR_NONE
&& next0 != IP4_MAP_NEXT_REASS)
error0 = MAP_ERROR_NO_BINDING;
/* construct ipv6 header */
vlib_buffer_advance (p0, -(sizeof (ip6_header_t)));
ip6h0 = vlib_buffer_get_current (p0);
vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
ip6h0->ip_version_traffic_class_and_flow_label =
ip4_map_vtcfl (ip40, p0);
ip6h0->payload_length = ip40->length;
ip6h0->protocol = IP_PROTOCOL_IP_IN_IP;
ip6h0->hop_limit = 0x40;
ip6h0->src_address = d0->ip6_src;
ip6h0->dst_address.as_u64[0] = clib_host_to_net_u64 (dal60);
ip6h0->dst_address.as_u64[1] = clib_host_to_net_u64 (dar60);
/*
* Determine next node. Can be one of:
* ip6-lookup, ip6-rewrite, ip4-fragment, ip4-virtreass, error-drop
*/
if (PREDICT_TRUE (error0 == MAP_ERROR_NONE))
{
if (PREDICT_FALSE
(d0->mtu
&& (clib_net_to_host_u16 (ip6h0->payload_length) +
sizeof (*ip6h0) > d0->mtu)))
{
next0 = ip4_map_fragment (p0, d0->mtu, df0, &error0);
}
else
{
next0 =
ip4_map_ip6_lookup_bypass (p0,
ip40) ?
IP4_MAP_NEXT_IP6_REWRITE : next0;
vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_TX,
cpu_index,
map_domain_index0, 1,
clib_net_to_host_u16
(ip6h0->payload_length) +
40);
}
}
else
{
next0 = IP4_MAP_NEXT_DROP;
}
if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
{
map_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof (*tr));
tr->map_domain_index = map_domain_index0;
tr->port = port0;
}
p0->error = error_node->errors[error0];
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;
}
/*
* ip4_map_reass
*/
static uword
ip4_map_reass (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;
vlib_node_runtime_t *error_node =
vlib_node_get_runtime (vm, ip4_map_reass_node.index);
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
map_main_t *mm = &map_main;
vlib_combined_counter_main_t *cm = mm->domain_counters;
u32 cpu_index = os_get_cpu_number ();
u32 *fragments_to_drop = NULL;
u32 *fragments_to_loopback = NULL;
while (n_left_from > 0)
{
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
u32 pi0;
vlib_buffer_t *p0;
map_domain_t *d0;
u8 error0 = MAP_ERROR_NONE;
ip4_header_t *ip40;
i32 port0 = 0;
ip6_header_t *ip60;
u32 next0 = IP4_MAP_REASS_NEXT_IP6_LOOKUP;
u32 map_domain_index0;
u8 cached = 0;
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);
ip40 = (ip4_header_t *) (ip60 + 1);
d0 =
ip4_map_get_domain (vnet_buffer (p0)->ip.adj_index[VLIB_TX],
&map_domain_index0);
map_ip4_reass_lock ();
map_ip4_reass_t *r = map_ip4_reass_get (ip40->src_address.as_u32,
ip40->dst_address.as_u32,
ip40->fragment_id,
ip40->protocol,
&fragments_to_drop);
if (PREDICT_FALSE (!r))
{
// Could not create a caching entry
error0 = MAP_ERROR_FRAGMENT_MEMORY;
}
else if (PREDICT_TRUE (ip4_get_fragment_offset (ip40)))
{
if (r->port >= 0)
{
// We know the port already
port0 = r->port;
}
else if (map_ip4_reass_add_fragment (r, pi0))
{
// Not enough space for caching
error0 = MAP_ERROR_FRAGMENT_MEMORY;
map_ip4_reass_free (r, &fragments_to_drop);
}
else
{
cached = 1;
}
}
else
if ((port0 =
ip4_get_port (ip40, MAP_RECEIVER, p0->current_length)) < 0)
{
// Could not find port. We'll free the reassembly.
error0 = MAP_ERROR_BAD_PROTOCOL;
port0 = 0;
map_ip4_reass_free (r, &fragments_to_drop);
}
else
{
r->port = port0;
map_ip4_reass_get_fragments (r, &fragments_to_loopback);
}
#ifdef MAP_IP4_REASS_COUNT_BYTES
if (!cached && r)
{
r->forwarded += clib_host_to_net_u16 (ip40->length) - 20;
if (!ip4_get_fragment_more (ip40))
r->expected_total =
ip4_get_fragment_offset (ip40) * 8 +
clib_host_to_net_u16 (ip40->length) - 20;
if (r->forwarded >= r->expected_total)
map_ip4_reass_free (r, &fragments_to_drop);
}
#endif
map_ip4_reass_unlock ();
// NOTE: Most operations have already been performed by ip4_map
// All we need is the right destination address
ip60->dst_address.as_u64[0] =
map_get_pfx_net (d0, ip40->dst_address.as_u32, port0);
ip60->dst_address.as_u64[1] =
map_get_sfx_net (d0, ip40->dst_address.as_u32, port0);
if (PREDICT_FALSE
(d0->mtu
&& (clib_net_to_host_u16 (ip60->payload_length) +
sizeof (*ip60) > d0->mtu)))
{
vnet_buffer (p0)->ip_frag.header_offset = sizeof (*ip60);
vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP6_LOOKUP;
vnet_buffer (p0)->ip_frag.mtu = d0->mtu;
vnet_buffer (p0)->ip_frag.flags = IP_FRAG_FLAG_IP6_HEADER;
next0 = IP4_MAP_REASS_NEXT_IP4_FRAGMENT;
}
if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
{
map_ip4_map_reass_trace_t *tr =
vlib_add_trace (vm, node, p0, sizeof (*tr));
tr->map_domain_index = map_domain_index0;
tr->port = port0;
tr->cached = cached;
}
if (cached)
{
//Dequeue the packet
n_left_to_next++;
to_next--;
}
else
{
if (error0 == MAP_ERROR_NONE)
vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_TX,
cpu_index, map_domain_index0,
1,
clib_net_to_host_u16
(ip60->payload_length) + 40);
next0 =
(error0 == MAP_ERROR_NONE) ? next0 : IP4_MAP_REASS_NEXT_DROP;
p0->error = error_node->errors[error0];
vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
n_left_to_next, pi0, next0);
}
//Loopback when we reach the end of the inpu vector
if (n_left_from == 0 && vec_len (fragments_to_loopback))
{
from = vlib_frame_vector_args (frame);
u32 len = vec_len (fragments_to_loopback);
if (len <= VLIB_FRAME_SIZE)
{
clib_memcpy (from, fragments_to_loopback,
sizeof (u32) * len);
n_left_from = len;
vec_reset_length (fragments_to_loopback);
}
else
{
clib_memcpy (from,
fragments_to_loopback + (len -
VLIB_FRAME_SIZE),
sizeof (u32) * VLIB_FRAME_SIZE);
n_left_from = VLIB_FRAME_SIZE;
_vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
}
}
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
map_send_all_to_node (vm, fragments_to_drop, node,
&error_node->errors[MAP_ERROR_FRAGMENT_DROPPED],
IP4_MAP_REASS_NEXT_DROP);
vec_free (fragments_to_drop);
vec_free (fragments_to_loopback);
return frame->n_vectors;
}
static char *map_error_strings[] = {
#define _(sym,string) string,
foreach_map_error
#undef _
};
/* *INDENT-OFF* */
VLIB_REGISTER_NODE(ip4_map_node) = {
.function = ip4_map,
.name = "ip4-map",
.vector_size = sizeof(u32),
.format_trace = format_map_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = MAP_N_ERROR,
.error_strings = map_error_strings,
.n_next_nodes = IP4_MAP_N_NEXT,
.next_nodes = {
[IP4_MAP_NEXT_IP6_LOOKUP] = "ip6-lookup",
#ifdef MAP_SKIP_IP6_LOOKUP
[IP4_MAP_NEXT_IP6_REWRITE] = "ip6-rewrite",
#endif
[IP4_MAP_NEXT_IP4_FRAGMENT] = "ip4-frag",
[IP4_MAP_NEXT_IP6_FRAGMENT] = "ip6-frag",
[IP4_MAP_NEXT_REASS] = "ip4-map-reass",
[IP4_MAP_NEXT_ICMP_ERROR] = "ip4-icmp-error",
[IP4_MAP_NEXT_DROP] = "error-drop",
},
};
/* *INDENT-ON* */
/* *INDENT-OFF* */
VLIB_REGISTER_NODE(ip4_map_reass_node) = {
.function = ip4_map_reass,
.name = "ip4-map-reass",
.vector_size = sizeof(u32),
.format_trace = format_ip4_map_reass_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = MAP_N_ERROR,
.error_strings = map_error_strings,
.n_next_nodes = IP4_MAP_REASS_N_NEXT,
.next_nodes = {
[IP4_MAP_REASS_NEXT_IP6_LOOKUP] = "ip6-lookup",
[IP4_MAP_REASS_NEXT_IP4_FRAGMENT] = "ip4-frag",
[IP4_MAP_REASS_NEXT_DROP] = "error-drop",
},
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
Reference in New Issue View Git Blame Copy Permalink