*/
#include <nat/nat64.h>
+#include <nat/nat_reass.h>
#include <vnet/ip/ip4_to_ip6.h>
#include <vnet/fib/ip4_fib.h>
return s;
}
+typedef struct
+{
+ u32 sw_if_index;
+ u32 next_index;
+ u8 cached;
+} nat64_out2in_reass_trace_t;
+
+static u8 *
+format_nat64_out2in_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 *);
+ nat64_out2in_reass_trace_t *t =
+ va_arg (*args, nat64_out2in_reass_trace_t *);
+
+ s =
+ format (s, "NAT64-out2in-reass: sw_if_index %d, next index %d, status %s",
+ t->sw_if_index, t->next_index,
+ t->cached ? "cached" : "translated");
+
+ return s;
+}
+
vlib_node_registration_t nat64_out2in_node;
+vlib_node_registration_t nat64_out2in_reass_node;
+
+#define foreach_nat64_out2in_error \
+_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \
+_(OUT2IN_PACKETS, "Good out2in packets processed") \
+_(NO_TRANSLATION, "No translation") \
+_(UNKNOWN, "unknown") \
+_(DROP_FRAGMENT, "Drop fragment") \
+_(MAX_REASS, "Maximum reassemblies exceeded") \
+_(MAX_FRAG, "Maximum fragments per reassembly exceeded")
-#define foreach_nat64_out2in_error \
-_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \
-_(OUT2IN_PACKETS, "Good out2in packets processed") \
-_(NO_TRANSLATION, "No translation") \
-_(UNKNOWN, "unknown")
typedef enum
{
{
NAT64_OUT2IN_NEXT_LOOKUP,
NAT64_OUT2IN_NEXT_DROP,
+ NAT64_OUT2IN_NEXT_REASS,
NAT64_OUT2IN_N_NEXT,
} nat64_out2in_next_t;
proto0 = ip_proto_to_snat_proto (ip40->protocol);
- if (proto0 == SNAT_PROTOCOL_ICMP)
+ if (PREDICT_FALSE (proto0 == ~0))
{
- if (icmp_to_icmp6
- (b0, nat64_out2in_icmp_set_cb, &ctx0,
- nat64_out2in_inner_icmp_set_cb, &ctx0))
+ if (ip4_to_ip6 (b0, nat64_out2in_unk_proto_set_cb, &ctx0))
{
next0 = NAT64_OUT2IN_NEXT_DROP;
b0->error = node->errors[NAT64_OUT2IN_ERROR_NO_TRANSLATION];
- goto trace0;
}
+ goto trace0;
}
- else if (proto0 == SNAT_PROTOCOL_TCP || proto0 == SNAT_PROTOCOL_UDP)
+
+ if (PREDICT_FALSE (ip4_is_fragment (ip40)))
{
- if (ip4_to_ip6_tcp_udp (b0, nat64_out2in_tcp_udp_set_cb, &ctx0))
+ next0 = NAT64_OUT2IN_NEXT_REASS;
+ goto trace0;
+ }
+
+ if (proto0 == SNAT_PROTOCOL_ICMP)
+ {
+ if (icmp_to_icmp6
+ (b0, nat64_out2in_icmp_set_cb, &ctx0,
+ nat64_out2in_inner_icmp_set_cb, &ctx0))
{
next0 = NAT64_OUT2IN_NEXT_DROP;
b0->error = node->errors[NAT64_OUT2IN_ERROR_NO_TRANSLATION];
}
else
{
- if (ip4_to_ip6 (b0, nat64_out2in_unk_proto_set_cb, &ctx0))
+ if (ip4_to_ip6_tcp_udp (b0, nat64_out2in_tcp_udp_set_cb, &ctx0))
{
next0 = NAT64_OUT2IN_NEXT_DROP;
b0->error = node->errors[NAT64_OUT2IN_ERROR_NO_TRANSLATION];
.format_trace = format_nat64_out2in_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN (nat64_out2in_error_strings),
- .error_strings = nat64_out2in_error_strings,.n_next_nodes = 2,
+ .error_strings = nat64_out2in_error_strings,
+ .n_next_nodes = NAT64_OUT2IN_N_NEXT,
/* edit / add dispositions here */
.next_nodes = {
[NAT64_OUT2IN_NEXT_DROP] = "error-drop",
[NAT64_OUT2IN_NEXT_LOOKUP] = "ip6-lookup",
+ [NAT64_OUT2IN_NEXT_REASS] = "nat64-out2in-reass",
},
};
/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (nat64_out2in_node, nat64_out2in_node_fn);
+typedef struct nat64_out2in_frag_set_ctx_t_
+{
+ vlib_main_t *vm;
+ vlib_buffer_t *b;
+ u32 sess_index;
+ u8 proto;
+ u8 first_frag;
+} nat64_out2in_frag_set_ctx_t;
+
+static int
+nat64_out2in_frag_set_cb (ip4_header_t * ip4, ip6_header_t * ip6, void *arg)
+{
+ nat64_main_t *nm = &nat64_main;
+ nat64_out2in_frag_set_ctx_t *ctx = arg;
+ nat64_db_st_entry_t *ste;
+ nat64_db_bib_entry_t *bibe;
+ udp_header_t *udp = ip4_next_header (ip4);
+ ip_csum_t csum;
+ u16 *checksum;
+
+ ste = nat64_db_st_entry_by_index (&nm->db, ctx->proto, ctx->sess_index);
+ if (!ste)
+ return -1;
+
+ bibe = nat64_db_bib_entry_by_index (&nm->db, ctx->proto, ste->bibe_index);
+ if (!bibe)
+ return -1;
+
+ nat64_session_reset_timeout (ste, ctx->vm);
+
+ if (ctx->first_frag)
+ {
+ udp->dst_port = bibe->in_port;
+
+ if (ip4->protocol == IP_PROTOCOL_UDP)
+ {
+ checksum = &udp->checksum;
+
+ if (!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, ste->in_r_addr.as_u64[0]);
+ csum = ip_csum_with_carry (csum, ste->in_r_addr.as_u64[1]);
+ csum = ip_csum_with_carry (csum, bibe->in_addr.as_u64[0]);
+ csum = ip_csum_with_carry (csum, bibe->in_addr.as_u64[1]);
+ *checksum = ~ip_csum_fold (csum);
+ }
+ else
+ {
+ csum = ip_csum_sub_even (*checksum, bibe->out_addr.as_u32);
+ csum = ip_csum_sub_even (csum, ste->out_r_addr.as_u32);
+ csum = ip_csum_sub_even (csum, bibe->out_port);
+ csum = ip_csum_add_even (csum, ste->in_r_addr.as_u64[0]);
+ csum = ip_csum_add_even (csum, ste->in_r_addr.as_u64[1]);
+ csum = ip_csum_add_even (csum, bibe->in_addr.as_u64[0]);
+ csum = ip_csum_add_even (csum, bibe->in_addr.as_u64[1]);
+ csum = ip_csum_add_even (csum, bibe->in_port);
+ *checksum = ip_csum_fold (csum);
+ }
+ }
+ else
+ {
+ tcp_header_t *tcp = ip4_next_header (ip4);
+ checksum = &tcp->checksum;
+ csum = ip_csum_sub_even (*checksum, bibe->out_addr.as_u32);
+ csum = ip_csum_sub_even (csum, ste->out_r_addr.as_u32);
+ csum = ip_csum_sub_even (csum, bibe->out_port);
+ csum = ip_csum_add_even (csum, ste->in_r_addr.as_u64[0]);
+ csum = ip_csum_add_even (csum, ste->in_r_addr.as_u64[1]);
+ csum = ip_csum_add_even (csum, bibe->in_addr.as_u64[0]);
+ csum = ip_csum_add_even (csum, bibe->in_addr.as_u64[1]);
+ csum = ip_csum_add_even (csum, bibe->in_port);
+ *checksum = ip_csum_fold (csum);
+ }
+
+ }
+
+ ip6->src_address.as_u64[0] = ste->in_r_addr.as_u64[0];
+ ip6->src_address.as_u64[1] = ste->in_r_addr.as_u64[1];
+
+ ip6->dst_address.as_u64[0] = bibe->in_addr.as_u64[0];
+ ip6->dst_address.as_u64[1] = bibe->in_addr.as_u64[1];
+
+ vnet_buffer (ctx->b)->sw_if_index[VLIB_TX] = bibe->fib_index;
+
+ return 0;
+}
+
+static uword
+nat64_out2in_reass_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ u32 n_left_from, *from, *to_next;
+ nat64_out2in_next_t next_index;
+ u32 pkts_processed = 0;
+ u32 *fragments_to_drop = 0;
+ u32 *fragments_to_loopback = 0;
+ nat64_main_t *nm = &nat64_main;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ 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 bi0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ ip4_header_t *ip40;
+ u8 cached0 = 0;
+ u32 sw_if_index0, fib_index0;
+ udp_header_t *udp0;
+ nat_reass_ip4_t *reass0;
+ ip46_address_t saddr0, daddr0;
+ nat64_db_st_entry_t *ste0;
+ nat64_db_bib_entry_t *bibe0;
+ ip6_address_t ip6_saddr0;
+ nat64_out2in_frag_set_ctx_t ctx0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ next0 = NAT64_OUT2IN_NEXT_LOOKUP;
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ fib_index0 =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
+ sw_if_index0);
+
+ if (PREDICT_FALSE (nat_reass_is_drop_frag (1)))
+ {
+ next0 = NAT64_OUT2IN_NEXT_DROP;
+ b0->error = node->errors[NAT64_OUT2IN_ERROR_DROP_FRAGMENT];
+ goto trace0;
+ }
+
+ ip40 = vlib_buffer_get_current (b0);
+
+ if (PREDICT_FALSE (!(ip40->protocol == IP_PROTOCOL_TCP
+ || ip40->protocol == IP_PROTOCOL_UDP)))
+ {
+ next0 = NAT64_OUT2IN_NEXT_DROP;
+ b0->error = node->errors[NAT64_OUT2IN_ERROR_DROP_FRAGMENT];
+ goto trace0;
+ }
+
+ udp0 = ip4_next_header (ip40);
+
+ reass0 = nat_ip4_reass_find_or_create (ip40->src_address,
+ ip40->dst_address,
+ ip40->fragment_id,
+ ip40->protocol,
+ 1, &fragments_to_drop);
+
+ if (PREDICT_FALSE (!reass0))
+ {
+ next0 = NAT64_OUT2IN_NEXT_DROP;
+ b0->error = node->errors[NAT64_OUT2IN_ERROR_MAX_REASS];
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (ip4_is_first_fragment (ip40)))
+ {
+ ctx0.first_frag = 1;
+
+ memset (&saddr0, 0, sizeof (saddr0));
+ saddr0.ip4.as_u32 = ip40->src_address.as_u32;
+ memset (&daddr0, 0, sizeof (daddr0));
+ daddr0.ip4.as_u32 = ip40->dst_address.as_u32;
+
+ ste0 =
+ nat64_db_st_entry_find (&nm->db, &daddr0, &saddr0,
+ udp0->dst_port, udp0->src_port,
+ ip40->protocol, fib_index0, 0);
+ if (!ste0)
+ {
+ bibe0 =
+ nat64_db_bib_entry_find (&nm->db, &daddr0, udp0->dst_port,
+ ip40->protocol, fib_index0, 0);
+ if (!bibe0)
+ {
+ next0 = NAT64_OUT2IN_NEXT_DROP;
+ b0->error =
+ node->errors[NAT64_OUT2IN_ERROR_NO_TRANSLATION];
+ goto trace0;
+ }
+
+ nat64_compose_ip6 (&ip6_saddr0, &ip40->src_address,
+ bibe0->fib_index);
+ ste0 =
+ nat64_db_st_entry_create (&nm->db, bibe0, &ip6_saddr0,
+ &saddr0.ip4, udp0->src_port);
+
+ if (!ste0)
+ {
+ next0 = NAT64_OUT2IN_NEXT_DROP;
+ b0->error =
+ node->errors[NAT64_OUT2IN_ERROR_NO_TRANSLATION];
+ goto trace0;
+ }
+ }
+ reass0->sess_index =
+ nat64_db_st_entry_get_index (&nm->db, ste0);
+
+ nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
+ }
+ else
+ {
+ ctx0.first_frag = 0;
+
+ if (PREDICT_FALSE (reass0->sess_index == (u32) ~ 0))
+ {
+ if (nat_ip4_reass_add_fragment (reass0, bi0))
+ {
+ b0->error = node->errors[NAT64_OUT2IN_ERROR_MAX_FRAG];
+ next0 = NAT64_OUT2IN_NEXT_DROP;
+ goto trace0;
+ }
+ cached0 = 1;
+ goto trace0;
+ }
+ }
+
+ ctx0.sess_index = reass0->sess_index;
+ ctx0.proto = ip40->protocol;
+ ctx0.vm = vm;
+ ctx0.b = b0;
+
+ if (ip4_to_ip6_fragmented (b0, nat64_out2in_frag_set_cb, &ctx0))
+ {
+ next0 = NAT64_OUT2IN_NEXT_DROP;
+ b0->error = node->errors[NAT64_OUT2IN_ERROR_UNKNOWN];
+ goto trace0;
+ }
+
+ trace0:
+ if (PREDICT_FALSE
+ ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat64_out2in_reass_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->cached = cached0;
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ }
+
+ if (cached0)
+ {
+ n_left_to_next++;
+ to_next--;
+ }
+ else
+ {
+ pkts_processed += next0 != NAT64_OUT2IN_NEXT_DROP;
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ 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);
+ }
+
+ vlib_node_increment_counter (vm, nat64_out2in_reass_node.index,
+ NAT64_OUT2IN_ERROR_OUT2IN_PACKETS,
+ pkts_processed);
+
+ nat_send_all_to_node (vm, fragments_to_drop, node,
+ &node->errors[NAT64_OUT2IN_ERROR_DROP_FRAGMENT],
+ NAT64_OUT2IN_NEXT_DROP);
+
+ vec_free (fragments_to_drop);
+ vec_free (fragments_to_loopback);
+ return frame->n_vectors;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat64_out2in_reass_node) = {
+ .function = nat64_out2in_reass_node_fn,
+ .name = "nat64-out2in-reass",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat64_out2in_reass_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN (nat64_out2in_error_strings),
+ .error_strings = nat64_out2in_error_strings,
+ .n_next_nodes = NAT64_OUT2IN_N_NEXT,
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [NAT64_OUT2IN_NEXT_DROP] = "error-drop",
+ [NAT64_OUT2IN_NEXT_LOOKUP] = "ip6-lookup",
+ [NAT64_OUT2IN_NEXT_REASS] = "nat64-out2in-reass",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat64_out2in_reass_node,
+ nat64_out2in_reass_node_fn);
+
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff