#include "map.h"
#include "../ip/ip_frag.h"
+#include <vnet/ip/ip6_to_ip4.h>
+#include <vnet/ip/ip4_to_ip6.h>
#define IP6_MAP_T_DUAL_LOOP
return ret;
}
-static_always_inline u8
-ip6_translate_tos (const ip6_header_t * ip6)
+typedef struct
{
-#ifdef IP6_MAP_T_OVERRIDE_TOS
- return IP6_MAP_T_OVERRIDE_TOS;
-#else
- return (clib_net_to_host_u32 (ip6->ip_version_traffic_class_and_flow_label)
- & 0x0ff00000) >> 20;
-#endif
-}
-
-//TODO: Find right place in memory for that
-/* *INDENT-OFF* */
-static u8 icmp6_to_icmp_updater_pointer_table[] =
- { 0, 1, ~0, ~0,
- 2, 2, 9, 8,
- 12, 12, 12, 12,
- 12, 12, 12, 12,
- 12, 12, 12, 12,
- 12, 12, 12, 12,
- 24, 24, 24, 24,
- 24, 24, 24, 24,
- 24, 24, 24, 24,
- 24, 24, 24, 24
- };
-/* *INDENT-ON* */
-
-static_always_inline int
-ip6_icmp_to_icmp6_in_place (icmp46_header_t * icmp, u32 icmp_len,
- i32 * sender_port, ip6_header_t ** inner_ip6)
-{
- *inner_ip6 = NULL;
- switch (icmp->type)
- {
- case ICMP6_echo_request:
- *sender_port = ((u16 *) icmp)[2];
- icmp->type = ICMP4_echo_request;
- break;
- case ICMP6_echo_reply:
- *sender_port = ((u16 *) icmp)[2];
- icmp->type = ICMP4_echo_reply;
- break;
- case ICMP6_destination_unreachable:
- *inner_ip6 = (ip6_header_t *) u8_ptr_add (icmp, 8);
- *sender_port = ip6_get_port (*inner_ip6, MAP_RECEIVER, icmp_len);
-
- switch (icmp->code)
- {
- case ICMP6_destination_unreachable_no_route_to_destination: //0
- case ICMP6_destination_unreachable_beyond_scope_of_source_address: //2
- case ICMP6_destination_unreachable_address_unreachable: //3
- icmp->type = ICMP4_destination_unreachable;
- icmp->code =
- ICMP4_destination_unreachable_destination_unreachable_host;
- break;
- case ICMP6_destination_unreachable_destination_administratively_prohibited: //1
- icmp->type =
- ICMP4_destination_unreachable;
- icmp->code =
- ICMP4_destination_unreachable_communication_administratively_prohibited;
- break;
- case ICMP6_destination_unreachable_port_unreachable:
- icmp->type = ICMP4_destination_unreachable;
- icmp->code = ICMP4_destination_unreachable_port_unreachable;
- break;
- default:
- return -1;
- }
- break;
- case ICMP6_packet_too_big:
- *inner_ip6 = (ip6_header_t *) u8_ptr_add (icmp, 8);
- *sender_port = ip6_get_port (*inner_ip6, MAP_RECEIVER, icmp_len);
-
- icmp->type = ICMP4_destination_unreachable;
- icmp->code = 4;
- {
- u32 advertised_mtu = clib_net_to_host_u32 (*((u32 *) (icmp + 1)));
- advertised_mtu -= 20;
- //FIXME: = minimum(advertised MTU-20, MTU_of_IPv4_nexthop, (MTU_of_IPv6_nexthop)-20)
- ((u16 *) (icmp))[3] = clib_host_to_net_u16 (advertised_mtu);
- }
- break;
-
- case ICMP6_time_exceeded:
- *inner_ip6 = (ip6_header_t *) u8_ptr_add (icmp, 8);
- *sender_port = ip6_get_port (*inner_ip6, MAP_RECEIVER, icmp_len);
-
- icmp->type = ICMP4_time_exceeded;
- break;
-
- case ICMP6_parameter_problem:
- *inner_ip6 = (ip6_header_t *) u8_ptr_add (icmp, 8);
- *sender_port = ip6_get_port (*inner_ip6, MAP_RECEIVER, icmp_len);
-
- switch (icmp->code)
- {
- case ICMP6_parameter_problem_erroneous_header_field:
- icmp->type = ICMP4_parameter_problem;
- icmp->code = ICMP4_parameter_problem_pointer_indicates_error;
- u32 pointer = clib_net_to_host_u32 (*((u32 *) (icmp + 1)));
- if (pointer >= 40)
- return -1;
-
- ((u8 *) (icmp + 1))[0] =
- icmp6_to_icmp_updater_pointer_table[pointer];
- break;
- case ICMP6_parameter_problem_unrecognized_next_header:
- icmp->type = ICMP4_destination_unreachable;
- icmp->code = ICMP4_destination_unreachable_port_unreachable;
- break;
- case ICMP6_parameter_problem_unrecognized_option:
- default:
- return -1;
- }
- break;
- default:
- return -1;
- break;
- }
- return 0;
-}
+ map_domain_t *d;
+ u16 sender_port;
+} icmp6_to_icmp_ctx_t;
-static_always_inline void
-_ip6_map_t_icmp (map_domain_t * d, vlib_buffer_t * p, u8 * error)
+static int
+ip6_to_ip4_set_icmp_cb (ip6_header_t * ip6, ip4_header_t * ip4, void *arg)
{
- ip6_header_t *ip6, *inner_ip6;
- ip4_header_t *ip4, *inner_ip4;
- u32 ip6_pay_len;
- icmp46_header_t *icmp;
- i32 sender_port;
- ip_csum_t csum;
- u32 ip4_sadr, inner_ip4_dadr;
-
- ip6 = vlib_buffer_get_current (p);
- ip6_pay_len = clib_net_to_host_u16 (ip6->payload_length);
- icmp = (icmp46_header_t *) (ip6 + 1);
- ASSERT (ip6_pay_len + sizeof (*ip6) <= p->current_length);
-
- if (ip6->protocol != IP_PROTOCOL_ICMP6)
- {
- //No extensions headers allowed here
- //TODO: SR header
- *error = MAP_ERROR_MALFORMED;
- return;
- }
-
- //There are no fragmented ICMP messages, so no extension header for now
-
- if (ip6_icmp_to_icmp6_in_place
- (icmp, ip6_pay_len, &sender_port, &inner_ip6))
- {
- //TODO: In case of 1:1 mapping it is not necessary to have the sender port
- *error = MAP_ERROR_ICMP;
- return;
- }
-
- if (sender_port < 0)
- {
- // In case of 1:1 mapping, we don't care about the port
- if (d->ea_bits_len == 0 && d->rules)
- {
- sender_port = 0;
- }
- else
- {
- *error = MAP_ERROR_ICMP;
- return;
- }
- }
+ icmp6_to_icmp_ctx_t *ctx = arg;
+ u32 ip4_sadr;
//Security check
//Note that this prevents an intermediate IPv6 router from answering the request
ip4_sadr = map_get_ip4 (&ip6->src_address);
- if (ip6->src_address.as_u64[0] != map_get_pfx_net (d, ip4_sadr, sender_port)
- || ip6->src_address.as_u64[1] != map_get_sfx_net (d, ip4_sadr,
- sender_port))
- {
- *error = MAP_ERROR_SEC_CHECK;
- return;
- }
-
- if (inner_ip6)
- {
- u16 *inner_L4_checksum, inner_l4_offset, inner_frag_offset,
- inner_frag_id;
- u8 *inner_l4, inner_protocol;
-
- //We have two headers to translate
- // FROM
- // [ IPv6 ]<- ext ->[IC][ IPv6 ]<- ext ->[L4 header ...
- // Handled cases:
- // [ IPv6 ][IC][ IPv6 ][L4 header ...
- // [ IPv6 ][IC][ IPv6 ][Fr][L4 header ...
- // TO
- // [ IPv4][IC][ IPv4][L4 header ...
-
- //TODO: This was already done deep in ip6_icmp_to_icmp6_in_place
- //We shouldn't have to do it again
- if (ip6_parse (inner_ip6, ip6_pay_len - 8,
- &inner_protocol, &inner_l4_offset, &inner_frag_offset))
- {
- *error = MAP_ERROR_MALFORMED;
- return;
- }
-
- inner_l4 = u8_ptr_add (inner_ip6, inner_l4_offset);
- inner_ip4 =
- (ip4_header_t *) u8_ptr_add (inner_l4, -sizeof (*inner_ip4));
- if (inner_frag_offset)
- {
- ip6_frag_hdr_t *inner_frag =
- (ip6_frag_hdr_t *) u8_ptr_add (inner_ip6, inner_frag_offset);
- inner_frag_id = frag_id_6to4 (inner_frag->identification);
- }
- else
- {
- inner_frag_id = 0;
- }
-
- //Do the translation of the inner packet
- if (inner_protocol == IP_PROTOCOL_TCP)
- {
- inner_L4_checksum = (u16 *) u8_ptr_add (inner_l4, 16);
- }
- else if (inner_protocol == IP_PROTOCOL_UDP)
- {
- inner_L4_checksum = (u16 *) u8_ptr_add (inner_l4, 6);
- }
- else if (inner_protocol == IP_PROTOCOL_ICMP6)
- {
- icmp46_header_t *inner_icmp = (icmp46_header_t *) inner_l4;
- csum = inner_icmp->checksum;
- csum = ip_csum_sub_even (csum, *((u16 *) inner_icmp));
- //It cannot be of a different type as ip6_icmp_to_icmp6_in_place succeeded
- inner_icmp->type = (inner_icmp->type == ICMP6_echo_request) ?
- ICMP4_echo_request : ICMP4_echo_reply;
- csum = ip_csum_add_even (csum, *((u16 *) inner_icmp));
- inner_icmp->checksum = ip_csum_fold (csum);
- inner_protocol = IP_PROTOCOL_ICMP; //Will be copied to ip6 later
- inner_L4_checksum = &inner_icmp->checksum;
- }
- else
- {
- *error = MAP_ERROR_BAD_PROTOCOL;
- return;
- }
-
- csum = *inner_L4_checksum;
- csum = ip_csum_sub_even (csum, inner_ip6->src_address.as_u64[0]);
- csum = ip_csum_sub_even (csum, inner_ip6->src_address.as_u64[1]);
- csum = ip_csum_sub_even (csum, inner_ip6->dst_address.as_u64[0]);
- csum = ip_csum_sub_even (csum, inner_ip6->dst_address.as_u64[1]);
-
- //Sanity check of the outer destination address
- if (ip6->dst_address.as_u64[0] != inner_ip6->src_address.as_u64[0] &&
- ip6->dst_address.as_u64[1] != inner_ip6->src_address.as_u64[1])
- {
- *error = MAP_ERROR_SEC_CHECK;
- return;
- }
-
- //Security check of inner packet
- inner_ip4_dadr = map_get_ip4 (&inner_ip6->dst_address);
- if (inner_ip6->dst_address.as_u64[0] !=
- map_get_pfx_net (d, inner_ip4_dadr, sender_port)
- || inner_ip6->dst_address.as_u64[1] != map_get_sfx_net (d,
- inner_ip4_dadr,
- sender_port))
- {
- *error = MAP_ERROR_SEC_CHECK;
- return;
- }
+ if (ip6->src_address.as_u64[0] !=
+ map_get_pfx_net (ctx->d, ip4_sadr, ctx->sender_port)
+ || ip6->src_address.as_u64[1] != map_get_sfx_net (ctx->d, ip4_sadr,
+ ctx->sender_port))
+ return -1;
+
+ ip4->dst_address.as_u32 =
+ ip6_map_t_embedded_address (ctx->d, &ip6->dst_address);
+ ip4->src_address.as_u32 = ip4_sadr;
- inner_ip4->dst_address.as_u32 = inner_ip4_dadr;
- inner_ip4->src_address.as_u32 =
- ip6_map_t_embedded_address (d, &inner_ip6->src_address);
- inner_ip4->ip_version_and_header_length =
- IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
- inner_ip4->tos = ip6_translate_tos (inner_ip6);
- inner_ip4->length =
- u16_net_add (inner_ip6->payload_length,
- sizeof (*ip4) + sizeof (*ip6) - inner_l4_offset);
- inner_ip4->fragment_id = inner_frag_id;
- inner_ip4->flags_and_fragment_offset =
- clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS);
- inner_ip4->ttl = inner_ip6->hop_limit;
- inner_ip4->protocol = inner_protocol;
- inner_ip4->checksum = ip4_header_checksum (inner_ip4);
-
- if (inner_ip4->protocol == IP_PROTOCOL_ICMP)
- {
- //Remove remainings of the pseudo-header in the csum
- csum =
- ip_csum_sub_even (csum, clib_host_to_net_u16 (IP_PROTOCOL_ICMP6));
- csum =
- ip_csum_sub_even (csum, inner_ip4->length - sizeof (*inner_ip4));
- }
- else
- {
- //Update to new pseudo-header
- csum = ip_csum_add_even (csum, inner_ip4->src_address.as_u32);
- csum = ip_csum_add_even (csum, inner_ip4->dst_address.as_u32);
- }
- *inner_L4_checksum = ip_csum_fold (csum);
+ return 0;
+}
- //Move up icmp header
- ip4 = (ip4_header_t *) u8_ptr_add (inner_l4, -2 * sizeof (*ip4) - 8);
- clib_memcpy (u8_ptr_add (inner_l4, -sizeof (*ip4) - 8), icmp, 8);
- icmp = (icmp46_header_t *) u8_ptr_add (inner_l4, -sizeof (*ip4) - 8);
- }
- else
- {
- //Only one header to translate
- ip4 = (ip4_header_t *) u8_ptr_add (ip6, sizeof (*ip6) - sizeof (*ip4));
- }
- vlib_buffer_advance (p, (u32) (((u8 *) ip4) - ((u8 *) ip6)));
+static int
+ip6_to_ip4_set_inner_icmp_cb (ip6_header_t * ip6, ip4_header_t * ip4,
+ void *arg)
+{
+ icmp6_to_icmp_ctx_t *ctx = arg;
+ u32 inner_ip4_dadr;
+
+ //Security check of inner packet
+ inner_ip4_dadr = map_get_ip4 (&ip6->dst_address);
+ if (ip6->dst_address.as_u64[0] !=
+ map_get_pfx_net (ctx->d, inner_ip4_dadr, ctx->sender_port)
+ || ip6->dst_address.as_u64[1] != map_get_sfx_net (ctx->d,
+ inner_ip4_dadr,
+ ctx->sender_port))
+ return -1;
+
+ ip4->dst_address.as_u32 = inner_ip4_dadr;
+ ip4->src_address.as_u32 =
+ ip6_map_t_embedded_address (ctx->d, &ip6->src_address);
- ip4->dst_address.as_u32 = ip6_map_t_embedded_address (d, &ip6->dst_address);
- ip4->src_address.as_u32 = ip4_sadr;
- ip4->ip_version_and_header_length =
- IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
- ip4->tos = ip6_translate_tos (ip6);
- ip4->fragment_id = 0;
- ip4->flags_and_fragment_offset = 0;
- ip4->ttl = ip6->hop_limit;
- ip4->protocol = IP_PROTOCOL_ICMP;
- //TODO fix the length depending on offset length
- ip4->length = u16_net_add (ip6->payload_length,
- (inner_ip6 ==
- NULL) ? sizeof (*ip4) : (2 * sizeof (*ip4) -
- sizeof (*ip6)));
- ip4->checksum = ip4_header_checksum (ip4);
-
- //TODO: We could do an easy diff-checksum for echo requests/replies
- //Recompute ICMP checksum
- icmp->checksum = 0;
- csum =
- ip_incremental_checksum (0, icmp,
- clib_net_to_host_u16 (ip4->length) -
- sizeof (*ip4));
- icmp->checksum = ~ip_csum_fold (csum);
+ return 0;
}
static uword
ip6_mapt_icmp_next_t next0;
map_domain_t *d0;
u16 len0;
+ icmp6_to_icmp_ctx_t ctx0;
+ ip6_header_t *ip60;
pi0 = to_next[0] = from[0];
from += 1;
next0 = IP6_MAPT_ICMP_NEXT_IP4_LOOKUP;
p0 = vlib_get_buffer (vm, pi0);
- len0 =
- clib_net_to_host_u16 (((ip6_header_t *)
- vlib_buffer_get_current
- (p0))->payload_length);
+ ip60 = vlib_buffer_get_current (p0);
+ len0 = clib_net_to_host_u16 (ip60->payload_length);
d0 =
pool_elt_at_index (map_main.domains,
vnet_buffer (p0)->map_t.map_domain_index);
- _ip6_map_t_icmp (d0, p0, &error0);
+ ctx0.sender_port = ip6_get_port (ip60, 0, len0);
+ ctx0.d = d0;
+ if (ctx0.sender_port == 0)
+ {
+ // In case of 1:1 mapping, we don't care about the port
+ if (!(d0->ea_bits_len == 0 && d0->rules))
+ {
+ error0 = MAP_ERROR_ICMP;
+ goto err0;
+ }
+ }
+
+ if (icmp6_to_icmp
+ (p0, ip6_to_ip4_set_icmp_cb, d0, ip6_to_ip4_set_inner_icmp_cb,
+ d0))
+ {
+ error0 = MAP_ERROR_ICMP;
+ goto err0;
+ }
if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
{
vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP;
next0 = IP6_MAPT_ICMP_NEXT_IP4_FRAG;
}
-
+ err0:
if (PREDICT_TRUE (error0 == MAP_ERROR_NONE))
{
vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX,
return frame->n_vectors;
}
+static int
+ip6_to_ip4_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, void *ctx)
+{
+ vlib_buffer_t *p = ctx;
+
+ ip4->dst_address.as_u32 = vnet_buffer (p)->map_t.v6.daddr;
+ ip4->src_address.as_u32 = vnet_buffer (p)->map_t.v6.saddr;
+
+ return 0;
+}
+
static uword
ip6_map_t_fragmented (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
+ vlib_node_runtime_t *error_node =
+ vlib_node_get_runtime (vm, ip6_map_t_fragmented_node.index);
while (n_left_from > 0)
{
{
u32 pi0, pi1;
vlib_buffer_t *p0, *p1;
- ip6_header_t *ip60, *ip61;
- ip6_frag_hdr_t *frag0, *frag1;
- ip4_header_t *ip40, *ip41;
- u16 frag_id0, frag_offset0, frag_id1, frag_offset1;
- u8 frag_more0, frag_more1;
u32 next0, next1;
pi0 = to_next[0] = from[0];
next1 = IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP;
p0 = vlib_get_buffer (vm, pi0);
p1 = vlib_get_buffer (vm, pi1);
- ip60 = vlib_buffer_get_current (p0);
- ip61 = vlib_buffer_get_current (p1);
- frag0 =
- (ip6_frag_hdr_t *) u8_ptr_add (ip60,
- vnet_buffer (p0)->map_t.
- v6.frag_offset);
- frag1 =
- (ip6_frag_hdr_t *) u8_ptr_add (ip61,
- vnet_buffer (p1)->map_t.
- v6.frag_offset);
- ip40 =
- (ip4_header_t *) u8_ptr_add (ip60,
- vnet_buffer (p0)->map_t.
- v6.l4_offset - sizeof (*ip40));
- ip41 =
- (ip4_header_t *) u8_ptr_add (ip61,
- vnet_buffer (p1)->map_t.
- v6.l4_offset - sizeof (*ip40));
- vlib_buffer_advance (p0,
- vnet_buffer (p0)->map_t.v6.l4_offset -
- sizeof (*ip40));
- vlib_buffer_advance (p1,
- vnet_buffer (p1)->map_t.v6.l4_offset -
- sizeof (*ip40));
-
- frag_id0 = frag_id_6to4 (frag0->identification);
- frag_id1 = frag_id_6to4 (frag1->identification);
- frag_more0 = ip6_frag_hdr_more (frag0);
- frag_more1 = ip6_frag_hdr_more (frag1);
- frag_offset0 = ip6_frag_hdr_offset (frag0);
- frag_offset1 = ip6_frag_hdr_offset (frag1);
-
- ip40->dst_address.as_u32 = vnet_buffer (p0)->map_t.v6.daddr;
- ip41->dst_address.as_u32 = vnet_buffer (p1)->map_t.v6.daddr;
- ip40->src_address.as_u32 = vnet_buffer (p0)->map_t.v6.saddr;
- ip41->src_address.as_u32 = vnet_buffer (p1)->map_t.v6.saddr;
- ip40->ip_version_and_header_length =
- IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
- ip41->ip_version_and_header_length =
- IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
- ip40->tos = ip6_translate_tos (ip60);
- ip41->tos = ip6_translate_tos (ip61);
- ip40->length = u16_net_add (ip60->payload_length,
- sizeof (*ip40) -
- vnet_buffer (p0)->map_t.v6.l4_offset +
- sizeof (*ip60));
- ip41->length =
- u16_net_add (ip61->payload_length,
- sizeof (*ip40) -
- vnet_buffer (p1)->map_t.v6.l4_offset +
- sizeof (*ip60));
- ip40->fragment_id = frag_id0;
- ip41->fragment_id = frag_id1;
- ip40->flags_and_fragment_offset =
- clib_host_to_net_u16 (frag_offset0 |
- (frag_more0 ? IP4_HEADER_FLAG_MORE_FRAGMENTS
- : 0));
- ip41->flags_and_fragment_offset =
- clib_host_to_net_u16 (frag_offset1 |
- (frag_more1 ? IP4_HEADER_FLAG_MORE_FRAGMENTS
- : 0));
- ip40->ttl = ip60->hop_limit;
- ip41->ttl = ip61->hop_limit;
- ip40->protocol =
- (vnet_buffer (p0)->map_t.v6.l4_protocol ==
- IP_PROTOCOL_ICMP6) ? IP_PROTOCOL_ICMP : vnet_buffer (p0)->
- map_t.v6.l4_protocol;
- ip41->protocol =
- (vnet_buffer (p1)->map_t.v6.l4_protocol ==
- IP_PROTOCOL_ICMP6) ? IP_PROTOCOL_ICMP : vnet_buffer (p1)->
- map_t.v6.l4_protocol;
- ip40->checksum = ip4_header_checksum (ip40);
- ip41->checksum = ip4_header_checksum (ip41);
- if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
+ if (ip6_to_ip4_fragmented (p0, ip6_to_ip4_set_cb, p0))
{
- vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
- vnet_buffer (p0)->ip_frag.header_offset = 0;
- vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP;
- next0 = IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG;
+ p0->error = error_node->errors[MAP_ERROR_FRAGMENT_DROPPED];
+ next0 = IP6_MAPT_FRAGMENTED_NEXT_DROP;
+ }
+ else
+ {
+ if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
+ {
+ //Send to fragmentation node if necessary
+ vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
+ vnet_buffer (p0)->ip_frag.header_offset = 0;
+ vnet_buffer (p0)->ip_frag.next_index =
+ IP4_FRAG_NEXT_IP4_LOOKUP;
+ next0 = IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG;
+ }
}
- if (vnet_buffer (p1)->map_t.mtu < p1->current_length)
+ if (ip6_to_ip4_fragmented (p1, ip6_to_ip4_set_cb, p1))
{
- vnet_buffer (p1)->ip_frag.mtu = vnet_buffer (p1)->map_t.mtu;
- vnet_buffer (p1)->ip_frag.header_offset = 0;
- vnet_buffer (p1)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP;
- next1 = IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG;
+ p1->error = error_node->errors[MAP_ERROR_FRAGMENT_DROPPED];
+ next1 = IP6_MAPT_FRAGMENTED_NEXT_DROP;
+ }
+ else
+ {
+ if (vnet_buffer (p1)->map_t.mtu < p1->current_length)
+ {
+ //Send to fragmentation node if necessary
+ vnet_buffer (p1)->ip_frag.mtu = vnet_buffer (p1)->map_t.mtu;
+ vnet_buffer (p1)->ip_frag.header_offset = 0;
+ vnet_buffer (p1)->ip_frag.next_index =
+ IP4_FRAG_NEXT_IP4_LOOKUP;
+ next1 = IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG;
+ }
}
vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
{
u32 pi0;
vlib_buffer_t *p0;
- ip6_header_t *ip60;
- ip6_frag_hdr_t *frag0;
- ip4_header_t *ip40;
- u16 frag_id0;
- u8 frag_more0;
- u16 frag_offset0;
u32 next0;
pi0 = to_next[0] = from[0];
next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP;
p0 = vlib_get_buffer (vm, pi0);
- ip60 = vlib_buffer_get_current (p0);
- frag0 =
- (ip6_frag_hdr_t *) u8_ptr_add (ip60,
- vnet_buffer (p0)->map_t.
- v6.frag_offset);
- ip40 =
- (ip4_header_t *) u8_ptr_add (ip60,
- vnet_buffer (p0)->map_t.
- v6.l4_offset - sizeof (*ip40));
- vlib_buffer_advance (p0,
- vnet_buffer (p0)->map_t.v6.l4_offset -
- sizeof (*ip40));
-
- frag_id0 = frag_id_6to4 (frag0->identification);
- frag_more0 = ip6_frag_hdr_more (frag0);
- frag_offset0 = ip6_frag_hdr_offset (frag0);
-
- ip40->dst_address.as_u32 = vnet_buffer (p0)->map_t.v6.daddr;
- ip40->src_address.as_u32 = vnet_buffer (p0)->map_t.v6.saddr;
- ip40->ip_version_and_header_length =
- IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
- ip40->tos = ip6_translate_tos (ip60);
- ip40->length = u16_net_add (ip60->payload_length,
- sizeof (*ip40) -
- vnet_buffer (p0)->map_t.v6.l4_offset +
- sizeof (*ip60));
- ip40->fragment_id = frag_id0;
- ip40->flags_and_fragment_offset =
- clib_host_to_net_u16 (frag_offset0 |
- (frag_more0 ? IP4_HEADER_FLAG_MORE_FRAGMENTS
- : 0));
- ip40->ttl = ip60->hop_limit;
- ip40->protocol =
- (vnet_buffer (p0)->map_t.v6.l4_protocol ==
- IP_PROTOCOL_ICMP6) ? IP_PROTOCOL_ICMP : vnet_buffer (p0)->
- map_t.v6.l4_protocol;
- ip40->checksum = ip4_header_checksum (ip40);
- if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
+ if (ip6_to_ip4_fragmented (p0, ip6_to_ip4_set_cb, p0))
{
- //Send to fragmentation node if necessary
- vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
- vnet_buffer (p0)->ip_frag.header_offset = 0;
- vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP;
- next0 = IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG;
+ p0->error = error_node->errors[MAP_ERROR_FRAGMENT_DROPPED];
+ next0 = IP6_MAPT_FRAGMENTED_NEXT_DROP;
+ }
+ else
+ {
+ if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
+ {
+ //Send to fragmentation node if necessary
+ vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
+ vnet_buffer (p0)->ip_frag.header_offset = 0;
+ vnet_buffer (p0)->ip_frag.next_index =
+ IP4_FRAG_NEXT_IP4_LOOKUP;
+ next0 = IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG;
+ }
}
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
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, ip6_map_t_tcp_udp_node.index);
+
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
{
u32 pi0, pi1;
vlib_buffer_t *p0, *p1;
- ip6_header_t *ip60, *ip61;
- ip_csum_t csum0, csum1;
- ip4_header_t *ip40, *ip41;
- u16 fragment_id0, flags0, *checksum0,
- fragment_id1, flags1, *checksum1;
ip6_mapt_tcp_udp_next_t next0, next1;
pi0 = to_next[0] = from[0];
p0 = vlib_get_buffer (vm, pi0);
p1 = vlib_get_buffer (vm, pi1);
- ip60 = vlib_buffer_get_current (p0);
- ip61 = vlib_buffer_get_current (p1);
- ip40 =
- (ip4_header_t *) u8_ptr_add (ip60,
- vnet_buffer (p0)->map_t.
- v6.l4_offset - sizeof (*ip40));
- ip41 =
- (ip4_header_t *) u8_ptr_add (ip61,
- vnet_buffer (p1)->map_t.
- v6.l4_offset - sizeof (*ip40));
- vlib_buffer_advance (p0,
- vnet_buffer (p0)->map_t.v6.l4_offset -
- sizeof (*ip40));
- vlib_buffer_advance (p1,
- vnet_buffer (p1)->map_t.v6.l4_offset -
- sizeof (*ip40));
- checksum0 =
- (u16 *) u8_ptr_add (ip60,
- vnet_buffer (p0)->map_t.checksum_offset);
- checksum1 =
- (u16 *) u8_ptr_add (ip61,
- vnet_buffer (p1)->map_t.checksum_offset);
-
- csum0 = ip_csum_sub_even (*checksum0, ip60->src_address.as_u64[0]);
- csum1 = ip_csum_sub_even (*checksum1, ip61->src_address.as_u64[0]);
- csum0 = ip_csum_sub_even (csum0, ip60->src_address.as_u64[1]);
- csum1 = ip_csum_sub_even (csum1, ip61->src_address.as_u64[1]);
- csum0 = ip_csum_sub_even (csum0, ip60->dst_address.as_u64[0]);
- csum1 = ip_csum_sub_even (csum0, ip61->dst_address.as_u64[0]);
- csum0 = ip_csum_sub_even (csum0, ip60->dst_address.as_u64[1]);
- csum1 = ip_csum_sub_even (csum1, ip61->dst_address.as_u64[1]);
- csum0 = ip_csum_add_even (csum0, vnet_buffer (p0)->map_t.v6.daddr);
- csum1 = ip_csum_add_even (csum1, vnet_buffer (p1)->map_t.v6.daddr);
- csum0 = ip_csum_add_even (csum0, vnet_buffer (p0)->map_t.v6.saddr);
- csum1 = ip_csum_add_even (csum1, vnet_buffer (p1)->map_t.v6.saddr);
- *checksum0 = ip_csum_fold (csum0);
- *checksum1 = ip_csum_fold (csum1);
-
- if (PREDICT_FALSE (vnet_buffer (p0)->map_t.v6.frag_offset))
- {
- ip6_frag_hdr_t *hdr = (ip6_frag_hdr_t *) u8_ptr_add (ip60,
- vnet_buffer
- (p0)->
- map_t.
- v6.frag_offset);
- fragment_id0 = frag_id_6to4 (hdr->identification);
- flags0 = clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS);
- }
- else
- {
- fragment_id0 = 0;
- flags0 = 0;
- }
- if (PREDICT_FALSE (vnet_buffer (p1)->map_t.v6.frag_offset))
+ if (ip6_to_ip4_tcp_udp (p0, ip6_to_ip4_set_cb, p0, 1))
{
- ip6_frag_hdr_t *hdr = (ip6_frag_hdr_t *) u8_ptr_add (ip61,
- vnet_buffer
- (p1)->
- map_t.
- v6.frag_offset);
- fragment_id1 = frag_id_6to4 (hdr->identification);
- flags1 = clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS);
+ p0->error = error_node->errors[MAP_ERROR_UNKNOWN];
+ next0 = IP6_MAPT_TCP_UDP_NEXT_DROP;
}
else
{
- fragment_id1 = 0;
- flags1 = 0;
+ if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
+ {
+ //Send to fragmentation node if necessary
+ vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
+ vnet_buffer (p0)->ip_frag.header_offset = 0;
+ vnet_buffer (p0)->ip_frag.next_index =
+ IP4_FRAG_NEXT_IP4_LOOKUP;
+ next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG;
+ }
}
- ip40->dst_address.as_u32 = vnet_buffer (p0)->map_t.v6.daddr;
- ip41->dst_address.as_u32 = vnet_buffer (p1)->map_t.v6.daddr;
- ip40->src_address.as_u32 = vnet_buffer (p0)->map_t.v6.saddr;
- ip41->src_address.as_u32 = vnet_buffer (p1)->map_t.v6.saddr;
- ip40->ip_version_and_header_length =
- IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
- ip41->ip_version_and_header_length =
- IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
- ip40->tos = ip6_translate_tos (ip60);
- ip41->tos = ip6_translate_tos (ip61);
- ip40->length = u16_net_add (ip60->payload_length,
- sizeof (*ip40) + sizeof (*ip60) -
- vnet_buffer (p0)->map_t.v6.l4_offset);
- ip41->length =
- u16_net_add (ip61->payload_length,
- sizeof (*ip40) + sizeof (*ip60) -
- vnet_buffer (p1)->map_t.v6.l4_offset);
- ip40->fragment_id = fragment_id0;
- ip41->fragment_id = fragment_id1;
- ip40->flags_and_fragment_offset = flags0;
- ip41->flags_and_fragment_offset = flags1;
- ip40->ttl = ip60->hop_limit;
- ip41->ttl = ip61->hop_limit;
- ip40->protocol = vnet_buffer (p0)->map_t.v6.l4_protocol;
- ip41->protocol = vnet_buffer (p1)->map_t.v6.l4_protocol;
- ip40->checksum = ip4_header_checksum (ip40);
- ip41->checksum = ip4_header_checksum (ip41);
-
- if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
+ if (ip6_to_ip4_tcp_udp (p1, ip6_to_ip4_set_cb, p1, 1))
{
- vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
- vnet_buffer (p0)->ip_frag.header_offset = 0;
- vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP;
- next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG;
+ p1->error = error_node->errors[MAP_ERROR_UNKNOWN];
+ next1 = IP6_MAPT_TCP_UDP_NEXT_DROP;
}
-
- if (vnet_buffer (p1)->map_t.mtu < p1->current_length)
+ else
{
- vnet_buffer (p1)->ip_frag.mtu = vnet_buffer (p1)->map_t.mtu;
- vnet_buffer (p1)->ip_frag.header_offset = 0;
- vnet_buffer (p1)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP;
- next1 = IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG;
+ if (vnet_buffer (p1)->map_t.mtu < p1->current_length)
+ {
+ //Send to fragmentation node if necessary
+ vnet_buffer (p1)->ip_frag.mtu = vnet_buffer (p1)->map_t.mtu;
+ vnet_buffer (p1)->ip_frag.header_offset = 0;
+ vnet_buffer (p1)->ip_frag.next_index =
+ IP4_FRAG_NEXT_IP4_LOOKUP;
+ next1 = IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG;
+ }
}
vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
{
u32 pi0;
vlib_buffer_t *p0;
- ip6_header_t *ip60;
- u16 *checksum0;
- ip_csum_t csum0;
- ip4_header_t *ip40;
- u16 fragment_id0;
- u16 flags0;
ip6_mapt_tcp_udp_next_t next0;
pi0 = to_next[0] = from[0];
next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP;
p0 = vlib_get_buffer (vm, pi0);
- ip60 = vlib_buffer_get_current (p0);
- ip40 =
- (ip4_header_t *) u8_ptr_add (ip60,
- vnet_buffer (p0)->map_t.
- v6.l4_offset - sizeof (*ip40));
- vlib_buffer_advance (p0,
- vnet_buffer (p0)->map_t.v6.l4_offset -
- sizeof (*ip40));
- checksum0 =
- (u16 *) u8_ptr_add (ip60,
- vnet_buffer (p0)->map_t.checksum_offset);
-
- //TODO: This can probably be optimized
- csum0 = ip_csum_sub_even (*checksum0, ip60->src_address.as_u64[0]);
- csum0 = ip_csum_sub_even (csum0, ip60->src_address.as_u64[1]);
- csum0 = ip_csum_sub_even (csum0, ip60->dst_address.as_u64[0]);
- csum0 = ip_csum_sub_even (csum0, ip60->dst_address.as_u64[1]);
- csum0 = ip_csum_add_even (csum0, vnet_buffer (p0)->map_t.v6.daddr);
- csum0 = ip_csum_add_even (csum0, vnet_buffer (p0)->map_t.v6.saddr);
- *checksum0 = ip_csum_fold (csum0);
-
- if (PREDICT_FALSE (vnet_buffer (p0)->map_t.v6.frag_offset))
+
+ if (ip6_to_ip4_tcp_udp (p0, ip6_to_ip4_set_cb, p0, 1))
{
- //Only the first fragment
- ip6_frag_hdr_t *hdr = (ip6_frag_hdr_t *) u8_ptr_add (ip60,
- vnet_buffer
- (p0)->
- map_t.
- v6.frag_offset);
- fragment_id0 = frag_id_6to4 (hdr->identification);
- flags0 = clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS);
+ p0->error = error_node->errors[MAP_ERROR_UNKNOWN];
+ next0 = IP6_MAPT_TCP_UDP_NEXT_DROP;
}
else
{
- fragment_id0 = 0;
- flags0 = 0;
- }
-
- ip40->dst_address.as_u32 = vnet_buffer (p0)->map_t.v6.daddr;
- ip40->src_address.as_u32 = vnet_buffer (p0)->map_t.v6.saddr;
- ip40->ip_version_and_header_length =
- IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
- ip40->tos = ip6_translate_tos (ip60);
- ip40->length = u16_net_add (ip60->payload_length,
- sizeof (*ip40) + sizeof (*ip60) -
- vnet_buffer (p0)->map_t.v6.l4_offset);
- ip40->fragment_id = fragment_id0;
- ip40->flags_and_fragment_offset = flags0;
- ip40->ttl = ip60->hop_limit;
- ip40->protocol = vnet_buffer (p0)->map_t.v6.l4_protocol;
- ip40->checksum = ip4_header_checksum (ip40);
-
- if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
- {
- //Send to fragmentation node if necessary
- vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
- vnet_buffer (p0)->ip_frag.header_offset = 0;
- vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP;
- next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG;
+ if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
+ {
+ //Send to fragmentation node if necessary
+ vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
+ vnet_buffer (p0)->ip_frag.header_offset = 0;
+ vnet_buffer (p0)->ip_frag.next_index =
+ IP4_FRAG_NEXT_IP4_LOOKUP;
+ next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG;
+ }
}
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
Code Review / vpp.git / blobdiff