#include <vnet/ip/ip_frag.h>
#include <vnet/ip/ip4_to_ip6.h>
-#define IP4_MAP_T_DUAL_LOOP 1
-
typedef enum
{
IP4_MAPT_NEXT_MAPT_TCP_UDP,
IP4_MAPT_NEXT_MAPT_ICMP,
IP4_MAPT_NEXT_MAPT_FRAGMENTED,
+ IP4_MAPT_NEXT_ICMP_ERROR,
IP4_MAPT_NEXT_DROP,
IP4_MAPT_N_NEXT
} ip4_mapt_next_t;
typedef enum
{
IP4_MAPT_ICMP_NEXT_IP6_LOOKUP,
+ IP4_MAPT_ICMP_NEXT_IP6_REWRITE,
IP4_MAPT_ICMP_NEXT_IP6_FRAG,
IP4_MAPT_ICMP_NEXT_DROP,
IP4_MAPT_ICMP_N_NEXT
typedef enum
{
IP4_MAPT_TCP_UDP_NEXT_IP6_LOOKUP,
+ IP4_MAPT_TCP_UDP_NEXT_IP6_REWRITE,
IP4_MAPT_TCP_UDP_NEXT_IP6_FRAG,
IP4_MAPT_TCP_UDP_NEXT_DROP,
IP4_MAPT_TCP_UDP_N_NEXT
typedef enum
{
IP4_MAPT_FRAGMENTED_NEXT_IP6_LOOKUP,
+ IP4_MAPT_FRAGMENTED_NEXT_IP6_REWRITE,
IP4_MAPT_FRAGMENTED_NEXT_IP6_FRAG,
IP4_MAPT_FRAGMENTED_NEXT_DROP,
IP4_MAPT_FRAGMENTED_N_NEXT
}) ip4_mapt_pseudo_header_t;
/* *INDENT-ON* */
-
-static_always_inline int
-ip4_map_fragment_cache (ip4_header_t * ip4, u16 port)
-{
- u32 *ignore = NULL;
- map_ip4_reass_lock ();
- map_ip4_reass_t *r =
- map_ip4_reass_get (ip4->src_address.as_u32, ip4->dst_address.as_u32,
- ip4->fragment_id,
- (ip4->protocol ==
- IP_PROTOCOL_ICMP) ? IP_PROTOCOL_ICMP6 : ip4->protocol,
- &ignore);
- if (r)
- r->port = port;
-
- map_ip4_reass_unlock ();
- return !r;
-}
-
-static_always_inline i32
-ip4_map_fragment_get_port (ip4_header_t * ip4)
-{
- u32 *ignore = NULL;
- map_ip4_reass_lock ();
- map_ip4_reass_t *r =
- map_ip4_reass_get (ip4->src_address.as_u32, ip4->dst_address.as_u32,
- ip4->fragment_id,
- (ip4->protocol ==
- IP_PROTOCOL_ICMP) ? IP_PROTOCOL_ICMP6 : ip4->protocol,
- &ignore);
- i32 ret = r ? r->port : -1;
- map_ip4_reass_unlock ();
- return ret;
-}
-
typedef struct
{
map_domain_t *d;
- u16 id;
+ u16 recv_port;
} icmp_to_icmp6_ctx_t;
static int
-ip4_to_ip6_set_icmp_cb (ip4_header_t * ip4, ip6_header_t * ip6, void *arg)
+ip4_to_ip6_set_icmp_cb (vlib_buffer_t * b, ip4_header_t * ip4,
+ ip6_header_t * ip6, void *arg)
{
icmp_to_icmp6_ctx_t *ctx = arg;
- map_main_t *mm = &map_main;
- if (mm->is_ce)
- {
- ip6->src_address.as_u64[0] =
- map_get_pfx_net (ctx->d, ip4->src_address.as_u32, ctx->id);
- ip6->src_address.as_u64[1] =
- map_get_sfx_net (ctx->d, ip4->src_address.as_u32, ctx->id);
- ip4_map_t_embedded_address (ctx->d, &ip6->dst_address,
- &ip4->dst_address);
- }
- else
- {
- ip4_map_t_embedded_address (ctx->d, &ip6->src_address,
- &ip4->src_address);
- ip6->dst_address.as_u64[0] =
- map_get_pfx_net (ctx->d, ip4->dst_address.as_u32, ctx->id);
- ip6->dst_address.as_u64[1] =
- map_get_sfx_net (ctx->d, ip4->dst_address.as_u32, ctx->id);
- }
+ ip4_map_t_embedded_address (ctx->d, &ip6->src_address, &ip4->src_address);
+ ip6->dst_address.as_u64[0] =
+ map_get_pfx_net (ctx->d, ip4->dst_address.as_u32, ctx->recv_port);
+ ip6->dst_address.as_u64[1] =
+ map_get_sfx_net (ctx->d, ip4->dst_address.as_u32, ctx->recv_port);
return 0;
}
static int
-ip4_to_ip6_set_inner_icmp_cb (ip4_header_t * ip4, ip6_header_t * ip6,
- void *arg)
+ip4_to_ip6_set_inner_icmp_cb (vlib_buffer_t * b, ip4_header_t * ip4,
+ ip6_header_t * ip6, void *arg)
{
icmp_to_icmp6_ctx_t *ctx = arg;
- map_main_t *mm = &map_main;
+ ip4_address_t old_src, old_dst;
- if (mm->is_ce)
- {
- //Note that the destination address is within the domain
- //while the source address is the one outside the domain
- ip4_map_t_embedded_address (ctx->d, &ip6->src_address,
- &ip4->src_address);
- ip6->dst_address.as_u64[0] =
- map_get_pfx_net (ctx->d, ip4->dst_address.as_u32, ctx->id);
- ip6->dst_address.as_u64[1] =
- map_get_sfx_net (ctx->d, ip4->dst_address.as_u32, ctx->id);
- }
- else
- {
- //Note that the source address is within the domain
- //while the destination address is the one outside the domain
- ip4_map_t_embedded_address (ctx->d, &ip6->dst_address,
- &ip4->dst_address);
- ip6->src_address.as_u64[0] =
- map_get_pfx_net (ctx->d, ip4->src_address.as_u32, ctx->id);
- ip6->src_address.as_u64[1] =
- map_get_sfx_net (ctx->d, ip4->src_address.as_u32, ctx->id);
- }
+ old_src.as_u32 = ip4->src_address.as_u32;
+ old_dst.as_u32 = ip4->dst_address.as_u32;
+
+ //Note that the source address is within the domain
+ //while the destination address is the one outside the domain
+ ip4_map_t_embedded_address (ctx->d, &ip6->dst_address, &old_dst);
+ ip6->src_address.as_u64[0] =
+ map_get_pfx_net (ctx->d, old_src.as_u32, ctx->recv_port);
+ ip6->src_address.as_u64[1] =
+ map_get_sfx_net (ctx->d, old_src.as_u32, ctx->recv_port);
return 0;
}
u16 len0;
icmp_to_icmp6_ctx_t ctx0;
ip4_header_t *ip40;
- icmp46_header_t *icmp0;
next0 = IP4_MAPT_ICMP_NEXT_IP6_LOOKUP;
pi0 = to_next[0] = from[0];
vnet_buffer (p0)->map_t.map_domain_index);
ip40 = vlib_buffer_get_current (p0);
- icmp0 = (icmp46_header_t *) (ip40 + 1);
-
- ctx0.id = ip4_get_port (ip40, icmp0->type == ICMP6_echo_request);
+ ctx0.recv_port = ip4_get_port (ip40, 0);
ctx0.d = d0;
- if (ctx0.id == 0)
+ if (ctx0.recv_port == 0)
{
// In case of 1:1 mapping, we don't care about the port
if (!(d0->ea_bits_len == 0 && d0->rules))
if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
{
vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
- vnet_buffer (p0)->ip_frag.next_index = IP6_FRAG_NEXT_IP6_LOOKUP;
+ vnet_buffer (p0)->ip_frag.next_index = IP_FRAG_NEXT_IP6_LOOKUP;
next0 = IP4_MAPT_ICMP_NEXT_IP6_FRAG;
}
+ else
+ {
+ next0 = ip4_map_ip6_lookup_bypass (p0, NULL) ?
+ IP4_MAPT_ICMP_NEXT_IP6_REWRITE : next0;
+ }
err0:
if (PREDICT_TRUE (error0 == MAP_ERROR_NONE))
{
return frame->n_vectors;
}
-static int
-ip4_to_ip6_set_cb (ip4_header_t * ip4, ip6_header_t * ip6, void *ctx)
+/*
+ * Translate fragmented IPv4 UDP/TCP packet to IPv6.
+ */
+always_inline int
+map_ip4_to_ip6_fragmented (vlib_buffer_t * p,
+ ip4_mapt_pseudo_header_t * pheader)
{
- ip4_mapt_pseudo_header_t *pheader = ctx;
+ ip4_header_t *ip4;
+ ip6_header_t *ip6;
+ ip6_frag_hdr_t *frag;
+
+ ip4 = vlib_buffer_get_current (p);
+ frag = (ip6_frag_hdr_t *) u8_ptr_add (ip4, sizeof (*ip4) - sizeof (*frag));
+ ip6 =
+ (ip6_header_t *) u8_ptr_add (ip4,
+ sizeof (*ip4) - sizeof (*frag) -
+ sizeof (*ip6));
+ vlib_buffer_advance (p, sizeof (*ip4) - sizeof (*ip6) - sizeof (*frag));
+
+ //We know that the protocol was one of ICMP, TCP or UDP
+ //because the first fragment was found and cached
+ frag->next_hdr =
+ (ip4->protocol == IP_PROTOCOL_ICMP) ? IP_PROTOCOL_ICMP6 : ip4->protocol;
+ frag->identification = frag_id_4to6 (ip4->fragment_id);
+ frag->rsv = 0;
+ frag->fragment_offset_and_more =
+ ip6_frag_hdr_offset_and_more (ip4_get_fragment_offset (ip4),
+ clib_net_to_host_u16
+ (ip4->flags_and_fragment_offset) &
+ IP4_HEADER_FLAG_MORE_FRAGMENTS);
+
+ ip6->ip_version_traffic_class_and_flow_label =
+ clib_host_to_net_u32 ((6 << 28) + (ip4->tos << 20));
+ ip6->payload_length =
+ clib_host_to_net_u16 (clib_net_to_host_u16 (ip4->length) -
+ sizeof (*ip4) + sizeof (*frag));
+ ip6->hop_limit = ip4->ttl;
+ ip6->protocol = IP_PROTOCOL_IPV6_FRAGMENTATION;
ip6->dst_address.as_u64[0] = pheader->daddr.as_u64[0];
ip6->dst_address.as_u64[1] = pheader->daddr.as_u64[1];
pheader0 = vlib_buffer_get_current (p0);
vlib_buffer_advance (p0, sizeof (*pheader0));
- if (ip4_to_ip6_fragmented (p0, ip4_to_ip6_set_cb, pheader0))
+ if (map_ip4_to_ip6_fragmented (p0, pheader0))
{
p0->error = error_node->errors[MAP_ERROR_FRAGMENT_DROPPED];
next0 = IP4_MAPT_FRAGMENTED_NEXT_DROP;
{
vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
vnet_buffer (p0)->ip_frag.next_index =
- IP6_FRAG_NEXT_IP6_LOOKUP;
+ IP_FRAG_NEXT_IP6_LOOKUP;
next0 = IP4_MAPT_FRAGMENTED_NEXT_IP6_FRAG;
}
+ else
+ {
+ next0 = ip4_map_ip6_lookup_bypass (p0, NULL) ?
+ IP4_MAPT_FRAGMENTED_NEXT_IP6_REWRITE : next0;
+ }
}
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
return frame->n_vectors;
}
+/*
+ * Translate IPv4 UDP/TCP packet to IPv6.
+ */
+always_inline int
+map_ip4_to_ip6_tcp_udp (vlib_buffer_t * p, ip4_mapt_pseudo_header_t * pheader)
+{
+ map_main_t *mm = &map_main;
+ ip4_header_t *ip4;
+ ip6_header_t *ip6;
+ ip_csum_t csum;
+ u16 *checksum;
+ ip6_frag_hdr_t *frag;
+ u32 frag_id;
+ ip4_address_t old_src, old_dst;
+
+ ip4 = vlib_buffer_get_current (p);
+
+ if (ip4->protocol == IP_PROTOCOL_UDP)
+ {
+ udp_header_t *udp = ip4_next_header (ip4);
+ checksum = &udp->checksum;
+
+ /*
+ * UDP checksum is optional over IPv4 but mandatory for IPv6 We
+ * do not check udp->length sanity but use our safe computed
+ * value instead
+ */
+ if (PREDICT_FALSE (!*checksum))
+ {
+ u16 udp_len = clib_host_to_net_u16 (ip4->length) - sizeof (*ip4);
+ csum = ip_incremental_checksum (0, udp, udp_len);
+ csum = ip_csum_with_carry (csum, clib_host_to_net_u16 (udp_len));
+ csum =
+ ip_csum_with_carry (csum, clib_host_to_net_u16 (IP_PROTOCOL_UDP));
+ csum = ip_csum_with_carry (csum, *((u64 *) (&ip4->src_address)));
+ *checksum = ~ip_csum_fold (csum);
+ }
+ }
+ else
+ {
+ tcp_header_t *tcp = ip4_next_header (ip4);
+ if (mm->tcp_mss > 0)
+ {
+ csum = tcp->checksum;
+ map_mss_clamping (tcp, &csum, mm->tcp_mss);
+ tcp->checksum = ip_csum_fold (csum);
+ }
+ checksum = &tcp->checksum;
+ }
+
+ old_src.as_u32 = ip4->src_address.as_u32;
+ old_dst.as_u32 = ip4->dst_address.as_u32;
+
+ /* Deal with fragmented packets */
+ if (PREDICT_FALSE (ip4->flags_and_fragment_offset &
+ clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS)))
+ {
+ ip6 =
+ (ip6_header_t *) u8_ptr_add (ip4,
+ sizeof (*ip4) - sizeof (*ip6) -
+ sizeof (*frag));
+ frag =
+ (ip6_frag_hdr_t *) u8_ptr_add (ip4, sizeof (*ip4) - sizeof (*frag));
+ frag_id = frag_id_4to6 (ip4->fragment_id);
+ vlib_buffer_advance (p, sizeof (*ip4) - sizeof (*ip6) - sizeof (*frag));
+ }
+ else
+ {
+ ip6 = (ip6_header_t *) (((u8 *) ip4) + sizeof (*ip4) - sizeof (*ip6));
+ vlib_buffer_advance (p, sizeof (*ip4) - sizeof (*ip6));
+ frag = NULL;
+ }
+
+ ip6->ip_version_traffic_class_and_flow_label =
+ clib_host_to_net_u32 ((6 << 28) + (ip4->tos << 20));
+ ip6->payload_length = u16_net_add (ip4->length, -sizeof (*ip4));
+ ip6->hop_limit = ip4->ttl;
+ ip6->protocol = ip4->protocol;
+ if (PREDICT_FALSE (frag != NULL))
+ {
+ frag->next_hdr = ip6->protocol;
+ frag->identification = frag_id;
+ frag->rsv = 0;
+ frag->fragment_offset_and_more = ip6_frag_hdr_offset_and_more (0, 1);
+ ip6->protocol = IP_PROTOCOL_IPV6_FRAGMENTATION;
+ ip6->payload_length = u16_net_add (ip6->payload_length, sizeof (*frag));
+ }
+
+ ip6->dst_address.as_u64[0] = pheader->daddr.as_u64[0];
+ ip6->dst_address.as_u64[1] = pheader->daddr.as_u64[1];
+ ip6->src_address.as_u64[0] = pheader->saddr.as_u64[0];
+ ip6->src_address.as_u64[1] = pheader->saddr.as_u64[1];
+
+ csum = ip_csum_sub_even (*checksum, old_src.as_u32);
+ csum = ip_csum_sub_even (csum, old_dst.as_u32);
+ csum = ip_csum_add_even (csum, ip6->src_address.as_u64[0]);
+ csum = ip_csum_add_even (csum, ip6->src_address.as_u64[1]);
+ csum = ip_csum_add_even (csum, ip6->dst_address.as_u64[0]);
+ csum = ip_csum_add_even (csum, ip6->dst_address.as_u64[1]);
+ *checksum = ip_csum_fold (csum);
+
+ return 0;
+}
+
static uword
ip4_map_t_tcp_udp (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-#ifdef IP4_MAP_T_DUAL_LOOP
- while (n_left_from >= 4 && n_left_to_next >= 2)
- {
- u32 pi0, pi1;
- vlib_buffer_t *p0, *p1;
- ip4_mapt_pseudo_header_t *pheader0, *pheader1;
- ip4_mapt_tcp_udp_next_t next0, next1;
-
- 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;
-
- next0 = IP4_MAPT_TCP_UDP_NEXT_IP6_LOOKUP;
- next1 = IP4_MAPT_TCP_UDP_NEXT_IP6_LOOKUP;
- p0 = vlib_get_buffer (vm, pi0);
- p1 = vlib_get_buffer (vm, pi1);
-
- //Accessing pseudo header
- pheader0 = vlib_buffer_get_current (p0);
- pheader1 = vlib_buffer_get_current (p1);
- vlib_buffer_advance (p0, sizeof (*pheader0));
- vlib_buffer_advance (p1, sizeof (*pheader1));
-
- if (ip4_to_ip6_tcp_udp (p0, ip4_to_ip6_set_cb, pheader0))
- {
- p0->error = error_node->errors[MAP_ERROR_UNKNOWN];
- next0 = IP4_MAPT_TCP_UDP_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.next_index =
- IP6_FRAG_NEXT_IP6_LOOKUP;
- next0 = IP4_MAPT_TCP_UDP_NEXT_IP6_FRAG;
- }
- }
-
- if (ip4_to_ip6_tcp_udp (p1, ip4_to_ip6_set_cb, pheader1))
- {
- p1->error = error_node->errors[MAP_ERROR_UNKNOWN];
- next1 = IP4_MAPT_TCP_UDP_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.next_index =
- IP6_FRAG_NEXT_IP6_LOOKUP;
- next1 = IP4_MAPT_TCP_UDP_NEXT_IP6_FRAG;
- }
- }
-
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next, pi0, pi1,
- next0, next1);
- }
-#endif
-
while (n_left_from > 0 && n_left_to_next > 0)
{
u32 pi0;
pheader0 = vlib_buffer_get_current (p0);
vlib_buffer_advance (p0, sizeof (*pheader0));
- if (ip4_to_ip6_tcp_udp (p0, ip4_to_ip6_set_cb, pheader0))
+ if (map_ip4_to_ip6_tcp_udp (p0, pheader0))
{
p0->error = error_node->errors[MAP_ERROR_UNKNOWN];
next0 = IP4_MAPT_TCP_UDP_NEXT_DROP;
//Send to fragmentation node if necessary
vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
vnet_buffer (p0)->ip_frag.next_index =
- IP6_FRAG_NEXT_IP6_LOOKUP;
+ IP_FRAG_NEXT_IP6_LOOKUP;
next0 = IP4_MAPT_TCP_UDP_NEXT_IP6_FRAG;
}
+ else
+ {
+ next0 = ip4_map_ip6_lookup_bypass (p0, NULL) ?
+ IP4_MAPT_TCP_UDP_NEXT_IP6_REWRITE : next0;
+ }
}
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next, pi0,
static_always_inline void
ip4_map_t_classify (vlib_buffer_t * p0, map_domain_t * d0,
ip4_header_t * ip40, u16 ip4_len0, i32 * dst_port0,
- u8 * error0, ip4_mapt_next_t * next0)
+ u8 * error0, ip4_mapt_next_t * next0, u16 l4_dst_port)
{
- map_main_t *mm = &map_main;
- u32 port_offset;
-
- if (mm->is_ce)
- port_offset = 0;
- else
- port_offset = 2;
-
if (PREDICT_FALSE (ip4_get_fragment_offset (ip40)))
{
*next0 = IP4_MAPT_NEXT_MAPT_FRAGMENTED;
}
else
{
- *dst_port0 = ip4_map_fragment_get_port (ip40);
+ *dst_port0 = l4_dst_port;
*error0 = (*dst_port0 == -1) ? MAP_ERROR_FRAGMENT_MEMORY : *error0;
}
}
vnet_buffer (p0)->map_t.checksum_offset = 36;
*next0 = IP4_MAPT_NEXT_MAPT_TCP_UDP;
*error0 = ip4_len0 < 40 ? MAP_ERROR_MALFORMED : *error0;
- *dst_port0 =
- (i32) * ((u16 *) u8_ptr_add (ip40, sizeof (*ip40) + port_offset));
+ *dst_port0 = l4_dst_port;
}
else if (PREDICT_TRUE (ip40->protocol == IP_PROTOCOL_UDP))
{
vnet_buffer (p0)->map_t.checksum_offset = 26;
*next0 = IP4_MAPT_NEXT_MAPT_TCP_UDP;
*error0 = ip4_len0 < 28 ? MAP_ERROR_MALFORMED : *error0;
- *dst_port0 =
- (i32) * ((u16 *) u8_ptr_add (ip40, sizeof (*ip40) + port_offset));
+ *dst_port0 = l4_dst_port;
}
else if (ip40->protocol == IP_PROTOCOL_ICMP)
{
*next0 = IP4_MAPT_NEXT_MAPT_ICMP;
if (d0->ea_bits_len == 0 && d0->rules)
*dst_port0 = 0;
- else if (((icmp46_header_t *) u8_ptr_add (ip40, sizeof (*ip40)))->code
+ else if (((icmp46_header_t *) u8_ptr_add (ip40, sizeof (*ip40)))->type
== ICMP4_echo_reply
|| ((icmp46_header_t *)
u8_ptr_add (ip40,
- sizeof (*ip40)))->code == ICMP4_echo_request)
- *dst_port0 = (i32) * ((u16 *) u8_ptr_add (ip40, sizeof (*ip40) + 6));
+ sizeof (*ip40)))->type == ICMP4_echo_request)
+ *dst_port0 = l4_dst_port;
}
else
{
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 = map_main.domain_counters;
u32 thread_index = vm->thread_index;
{
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-#ifdef IP4_MAP_T_DUAL_LOOP
- while (n_left_from >= 4 && n_left_to_next >= 2)
- {
- u32 pi0, pi1;
- vlib_buffer_t *p0, *p1;
- ip4_header_t *ip40, *ip41;
- map_domain_t *d0, *d1;
- ip4_mapt_next_t next0 = 0, next1 = 0;
- u16 ip4_len0, ip4_len1;
- u8 error0, error1;
- i32 map_port0, map_port1;
- ip4_mapt_pseudo_header_t *pheader0, *pheader1;
-
- 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;
- error0 = MAP_ERROR_NONE;
- error1 = MAP_ERROR_NONE;
-
- p0 = vlib_get_buffer (vm, pi0);
- p1 = vlib_get_buffer (vm, pi1);
- ip40 = vlib_buffer_get_current (p0);
- ip41 = vlib_buffer_get_current (p1);
- ip4_len0 = clib_host_to_net_u16 (ip40->length);
- ip4_len1 = clib_host_to_net_u16 (ip41->length);
-
- if (PREDICT_FALSE (p0->current_length < ip4_len0 ||
- ip40->ip_version_and_header_length != 0x45))
- {
- error0 = MAP_ERROR_UNKNOWN;
- next0 = IP4_MAPT_NEXT_DROP;
- }
-
- if (PREDICT_FALSE (p1->current_length < ip4_len1 ||
- ip41->ip_version_and_header_length != 0x45))
- {
- error1 = MAP_ERROR_UNKNOWN;
- next1 = IP4_MAPT_NEXT_DROP;
- }
-
- vnet_buffer (p0)->map_t.map_domain_index =
- vnet_buffer (p0)->ip.adj_index[VLIB_TX];
- d0 = ip4_map_get_domain (vnet_buffer (p0)->map_t.map_domain_index);
- vnet_buffer (p1)->map_t.map_domain_index =
- vnet_buffer (p1)->ip.adj_index[VLIB_TX];
- d1 = ip4_map_get_domain (vnet_buffer (p1)->map_t.map_domain_index);
-
- vnet_buffer (p0)->map_t.mtu = d0->mtu ? d0->mtu : ~0;
- vnet_buffer (p1)->map_t.mtu = d1->mtu ? d1->mtu : ~0;
-
- map_port0 = -1;
- map_port1 = -1;
-
- ip4_map_t_classify (p0, d0, ip40, ip4_len0, &map_port0, &error0,
- &next0);
- ip4_map_t_classify (p1, d1, ip41, ip4_len1, &map_port1, &error1,
- &next1);
-
- //Add MAP-T pseudo header in front of the packet
- vlib_buffer_advance (p0, -sizeof (*pheader0));
- vlib_buffer_advance (p1, -sizeof (*pheader1));
- pheader0 = vlib_buffer_get_current (p0);
- pheader1 = vlib_buffer_get_current (p1);
-
- //Save addresses within the packet
- if (mm->is_ce)
- {
- ip4_map_t_embedded_address (d0, &pheader0->daddr,
- &ip40->dst_address);
- ip4_map_t_embedded_address (d1, &pheader1->daddr,
- &ip41->dst_address);
- pheader0->saddr.as_u64[0] =
- map_get_pfx_net (d0, ip40->src_address.as_u32,
- (u16) map_port0);
- pheader0->saddr.as_u64[1] =
- map_get_sfx_net (d0, ip40->src_address.as_u32,
- (u16) map_port0);
- pheader1->saddr.as_u64[0] =
- map_get_pfx_net (d1, ip41->src_address.as_u32,
- (u16) map_port1);
- pheader1->saddr.as_u64[1] =
- map_get_sfx_net (d1, ip41->src_address.as_u32,
- (u16) map_port1);
- }
- else
- {
- ip4_map_t_embedded_address (d0, &pheader0->saddr,
- &ip40->src_address);
- ip4_map_t_embedded_address (d1, &pheader1->saddr,
- &ip41->src_address);
- pheader0->daddr.as_u64[0] =
- map_get_pfx_net (d0, ip40->dst_address.as_u32,
- (u16) map_port0);
- pheader0->daddr.as_u64[1] =
- map_get_sfx_net (d0, ip40->dst_address.as_u32,
- (u16) map_port0);
- pheader1->daddr.as_u64[0] =
- map_get_pfx_net (d1, ip41->dst_address.as_u32,
- (u16) map_port1);
- pheader1->daddr.as_u64[1] =
- map_get_sfx_net (d1, ip41->dst_address.as_u32,
- (u16) map_port1);
- }
-
- if (PREDICT_FALSE
- (ip4_is_first_fragment (ip40) && (map_port0 != -1)
- && (d0->ea_bits_len != 0 || !d0->rules)
- && ip4_map_fragment_cache (ip40, map_port0)))
- {
- error0 = MAP_ERROR_FRAGMENT_MEMORY;
- }
-
- if (PREDICT_FALSE
- (ip4_is_first_fragment (ip41) && (map_port1 != -1)
- && (d1->ea_bits_len != 0 || !d1->rules)
- && ip4_map_fragment_cache (ip41, map_port1)))
- {
- error1 = MAP_ERROR_FRAGMENT_MEMORY;
- }
-
- if (PREDICT_TRUE
- (error0 == MAP_ERROR_NONE && next0 != IP4_MAPT_NEXT_MAPT_ICMP))
- {
- vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_TX,
- thread_index,
- vnet_buffer (p0)->
- map_t.map_domain_index, 1,
- clib_net_to_host_u16
- (ip40->length));
- }
-
- if (PREDICT_TRUE
- (error1 == MAP_ERROR_NONE && next1 != IP4_MAPT_NEXT_MAPT_ICMP))
- {
- vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_TX,
- thread_index,
- vnet_buffer (p1)->
- map_t.map_domain_index, 1,
- clib_net_to_host_u16
- (ip41->length));
- }
-
- next0 = (error0 != MAP_ERROR_NONE) ? IP4_MAPT_NEXT_DROP : next0;
- next1 = (error1 != MAP_ERROR_NONE) ? IP4_MAPT_NEXT_DROP : next1;
- 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);
- }
-#endif
-
while (n_left_from > 0 && n_left_to_next > 0)
{
u32 pi0;
vlib_buffer_t *p0;
ip4_header_t *ip40;
map_domain_t *d0;
- ip4_mapt_next_t next0;
+ ip4_mapt_next_t next0 = 0;
u16 ip4_len0;
u8 error0;
- i32 map_port0;
+ i32 dst_port0;
ip4_mapt_pseudo_header_t *pheader0;
pi0 = to_next[0] = from[0];
error0 = MAP_ERROR_NONE;
p0 = vlib_get_buffer (vm, pi0);
+
+ u16 l4_dst_port = vnet_buffer (p0)->ip.reass.l4_dst_port;
+
ip40 = vlib_buffer_get_current (p0);
ip4_len0 = clib_host_to_net_u16 (ip40->length);
if (PREDICT_FALSE (p0->current_length < ip4_len0 ||
ip40->ip_version_and_header_length != 0x45))
{
error0 = MAP_ERROR_UNKNOWN;
- next0 = IP4_MAPT_NEXT_DROP;
}
- vnet_buffer (p0)->map_t.map_domain_index =
- vnet_buffer (p0)->ip.adj_index[VLIB_TX];
- d0 = ip4_map_get_domain (vnet_buffer (p0)->map_t.map_domain_index);
-
- vnet_buffer (p0)->map_t.mtu = d0->mtu ? d0->mtu : ~0;
+ d0 = ip4_map_get_domain (&ip40->dst_address,
+ &vnet_buffer (p0)->map_t.map_domain_index,
+ &error0);
- map_port0 = -1;
- ip4_map_t_classify (p0, d0, ip40, ip4_len0, &map_port0, &error0,
- &next0);
+ if (!d0)
+ { /* Guess it wasn't for us */
+ vnet_feature_next (&next0, p0);
+ goto exit;
+ }
- //Add MAP-T pseudo header in front of the packet
- vlib_buffer_advance (p0, -sizeof (*pheader0));
- pheader0 = vlib_buffer_get_current (p0);
+ dst_port0 = -1;
- //Save addresses within the packet
- if (mm->is_ce)
+ if (PREDICT_FALSE (ip40->ttl == 1))
{
- ip4_map_t_embedded_address (d0, &pheader0->daddr,
- &ip40->dst_address);
- pheader0->saddr.as_u64[0] =
- map_get_pfx_net (d0, ip40->src_address.as_u32,
- (u16) map_port0);
- pheader0->saddr.as_u64[1] =
- map_get_sfx_net (d0, ip40->src_address.as_u32,
- (u16) map_port0);
+ icmp4_error_set_vnet_buffer (p0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ p0->error = error_node->errors[MAP_ERROR_TIME_EXCEEDED];
+ next0 = IP4_MAPT_NEXT_ICMP_ERROR;
+ goto trace;
}
- else
+
+ bool df0 =
+ ip40->flags_and_fragment_offset &
+ clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT);
+
+ vnet_buffer (p0)->map_t.mtu = d0->mtu ? d0->mtu : ~0;
+
+ if (PREDICT_FALSE
+ (df0 && !map_main.frag_ignore_df
+ &&
+ ((ip4_len0 +
+ (sizeof (ip6_header_t) - sizeof (ip4_header_t))) >
+ vnet_buffer (p0)->map_t.mtu)))
{
- ip4_map_t_embedded_address (d0, &pheader0->saddr,
- &ip40->src_address);
- pheader0->daddr.as_u64[0] =
- map_get_pfx_net (d0, ip40->dst_address.as_u32,
- (u16) map_port0);
- pheader0->daddr.as_u64[1] =
- map_get_sfx_net (d0, ip40->dst_address.as_u32,
- (u16) map_port0);
+ icmp4_error_set_vnet_buffer (p0, ICMP4_destination_unreachable,
+ ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set,
+ vnet_buffer (p0)->map_t.mtu -
+ (sizeof (ip6_header_t) -
+ sizeof (ip4_header_t)));
+ p0->error = error_node->errors[MAP_ERROR_DF_SET];
+ next0 = IP4_MAPT_NEXT_ICMP_ERROR;
+ goto trace;
}
- //It is important to cache at this stage because the result might be necessary
- //for packets within the same vector.
- //Actually, this approach even provides some limited out-of-order fragments support
- if (PREDICT_FALSE
- (ip4_is_first_fragment (ip40) && (map_port0 != -1)
- && (d0->ea_bits_len != 0 || !d0->rules)
- && ip4_map_fragment_cache (ip40, map_port0)))
+ ip4_map_t_classify (p0, d0, ip40, ip4_len0, &dst_port0, &error0,
+ &next0, l4_dst_port);
+
+ /* Verify that port is not among the well-known ports */
+ if ((d0->psid_length > 0 && d0->psid_offset > 0)
+ && (clib_net_to_host_u16 (dst_port0) <
+ (0x1 << (16 - d0->psid_offset))))
{
- error0 = MAP_ERROR_UNKNOWN;
+ error0 = MAP_ERROR_SEC_CHECK;
}
+ //Add MAP-T pseudo header in front of the packet
+ vlib_buffer_advance (p0, -sizeof (*pheader0));
+ pheader0 = vlib_buffer_get_current (p0);
+
+ //Save addresses within the packet
+ ip4_map_t_embedded_address (d0, &pheader0->saddr,
+ &ip40->src_address);
+ pheader0->daddr.as_u64[0] =
+ map_get_pfx_net (d0, ip40->dst_address.as_u32, (u16) dst_port0);
+ pheader0->daddr.as_u64[1] =
+ map_get_sfx_net (d0, ip40->dst_address.as_u32, (u16) dst_port0);
+
if (PREDICT_TRUE
(error0 == MAP_ERROR_NONE && next0 != IP4_MAPT_NEXT_MAPT_ICMP))
{
next0 = (error0 != MAP_ERROR_NONE) ? IP4_MAPT_NEXT_DROP : next0;
p0->error = error_node->errors[error0];
+ trace:
+ if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ map_add_trace (vm, node, p0, d0 - map_main.domains, dst_port0);
+ }
+ exit:
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next, pi0,
next0);
};
/* *INDENT-OFF* */
+VNET_FEATURE_INIT (ip4_map_t_feature, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "ip4-map-t",
+ .runs_before = VNET_FEATURES ("ip4-flow-classify"),
+ .runs_after = VNET_FEATURES ("ip4-sv-reassembly-feature"),
+};
+
VLIB_REGISTER_NODE(ip4_map_t_fragmented_node) = {
.function = ip4_map_t_fragmented,
.name = "ip4-map-t-fragmented",
.n_next_nodes = IP4_MAPT_FRAGMENTED_N_NEXT,
.next_nodes = {
[IP4_MAPT_FRAGMENTED_NEXT_IP6_LOOKUP] = "ip6-lookup",
+ [IP4_MAPT_FRAGMENTED_NEXT_IP6_REWRITE] = "ip6-load-balance",
[IP4_MAPT_FRAGMENTED_NEXT_IP6_FRAG] = IP6_FRAG_NODE_NAME,
[IP4_MAPT_FRAGMENTED_NEXT_DROP] = "error-drop",
},
.n_next_nodes = IP4_MAPT_ICMP_N_NEXT,
.next_nodes = {
[IP4_MAPT_ICMP_NEXT_IP6_LOOKUP] = "ip6-lookup",
+ [IP4_MAPT_ICMP_NEXT_IP6_REWRITE] = "ip6-load-balance",
[IP4_MAPT_ICMP_NEXT_IP6_FRAG] = IP6_FRAG_NODE_NAME,
[IP4_MAPT_ICMP_NEXT_DROP] = "error-drop",
},
.n_next_nodes = IP4_MAPT_TCP_UDP_N_NEXT,
.next_nodes = {
[IP4_MAPT_TCP_UDP_NEXT_IP6_LOOKUP] = "ip6-lookup",
+ [IP4_MAPT_TCP_UDP_NEXT_IP6_REWRITE] = "ip6-load-balance",
[IP4_MAPT_TCP_UDP_NEXT_IP6_FRAG] = IP6_FRAG_NODE_NAME,
[IP4_MAPT_TCP_UDP_NEXT_DROP] = "error-drop",
},
[IP4_MAPT_NEXT_MAPT_TCP_UDP] = "ip4-map-t-tcp-udp",
[IP4_MAPT_NEXT_MAPT_ICMP] = "ip4-map-t-icmp",
[IP4_MAPT_NEXT_MAPT_FRAGMENTED] = "ip4-map-t-fragmented",
+ [IP4_MAPT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
[IP4_MAPT_NEXT_DROP] = "error-drop",
},
};
Code Review / vpp.git / blobdiff