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authorSachin Saxena <sachin.saxena@freescale.com>2018-02-28 20:28:52 +0530
committerSachin Saxena <sachin.saxena@nxp.com>2018-02-28 20:34:56 +0530
commit0689fce93ba269c48f83a2f70f971b3976d04c90 (patch)
tree4cc2908df3598507cc1828ac19d8c43b22450ffa /src/plugins/sixrd
parent746b57564deede624261ab8a96c94f562f24d22c (diff)
parentd594711a5d79859a7d0bde83a516f7ab52051d9b (diff)
Merge branch 'stable/1710' of https://gerrit.fd.io/r/vpp into 17101710
Diffstat (limited to 'src/plugins/sixrd')
-rw-r--r--src/plugins/sixrd/ip4_sixrd.c127
-rw-r--r--src/plugins/sixrd/ip6_sixrd.c129
-rw-r--r--src/plugins/sixrd/sixrd.c377
-rw-r--r--src/plugins/sixrd/sixrd.h141
-rw-r--r--src/plugins/sixrd/sixrd_dpo.c132
-rw-r--r--src/plugins/sixrd/sixrd_dpo.h61
6 files changed, 967 insertions, 0 deletions
diff --git a/src/plugins/sixrd/ip4_sixrd.c b/src/plugins/sixrd/ip4_sixrd.c
new file mode 100644
index 00000000..2fb8015d
--- /dev/null
+++ b/src/plugins/sixrd/ip4_sixrd.c
@@ -0,0 +1,127 @@
+/*---------------------------------------------------------------------------
+ * Copyright (c) 2009-2014 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 "sixrd.h"
+
+static vlib_node_registration_t ip4_sixrd_node;
+
+typedef enum {
+ IP4_SIXRD_NEXT_IP6_LOOKUP,
+ IP4_SIXRD_NEXT_DROP,
+ IP4_SIXRD_N_NEXT,
+} ip4_sixrd_next_t;
+
+/*
+ * ip4_sixrd_sec_check
+ */
+static_always_inline void
+ip4_sixrd_sec_check (sixrd_domain_t *d, ip4_address_t sa4, ip6_address_t sa6, u8 *error)
+{
+ u32 a = sixrd_get_addr(d, sa6.as_u64[0]);
+ clib_warning("Security check: %U %U", format_ip4_address, &a, format_ip4_address, &sa4);
+ if (PREDICT_FALSE(sixrd_get_addr(d, sa6.as_u64[0]) != sa4.as_u32))
+ *error = SIXRD_ERROR_SEC_CHECK;
+}
+
+/*
+ * ip4_sixrd
+ */
+static uword
+ip4_sixrd (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_sixrd_node.index);
+ u32 decap = 0;
+
+ 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);
+
+ /* Single loop */
+ while (n_left_from > 0 && n_left_to_next > 0) {
+ u32 pi0;
+ vlib_buffer_t *p0;
+ u8 error0 = SIXRD_ERROR_NONE;
+ sixrd_domain_t *d0 = 0;
+ ip4_header_t *ip40;
+ ip6_header_t *ip60;
+ u32 sixrd_domain_index0 = ~0;
+ u32 next0;
+
+ 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);
+
+ /* Throw away anything that isn't IP in IP. */
+ if (PREDICT_TRUE(ip40->protocol == IP_PROTOCOL_IPV6 && clib_net_to_host_u16(ip40->length) >= 60)) {
+ vlib_buffer_advance(p0, sizeof(ip4_header_t));
+ ip60 = vlib_buffer_get_current(p0);
+ d0 = ip4_sixrd_get_domain(vnet_buffer(p0)->ip.adj_index[VLIB_TX], (ip6_address_t *)&ip60->src_address,
+ &sixrd_domain_index0, &error0);
+ } else {
+ error0 = SIXRD_ERROR_BAD_PROTOCOL;
+ }
+ if (d0) {
+ /* SIXRD inbound security check */
+ ip4_sixrd_sec_check(d0, ip40->src_address, ip60->src_address, &error0);
+ }
+
+ next0 = error0 == SIXRD_ERROR_NONE ? IP4_SIXRD_NEXT_IP6_LOOKUP : IP4_SIXRD_NEXT_DROP;
+
+ if (PREDICT_FALSE(p0->flags & VLIB_BUFFER_IS_TRACED)) {
+ sixrd_trace_t *tr = vlib_add_trace(vm, node, p0, sizeof(*tr));
+ tr->sixrd_domain_index = sixrd_domain_index0;
+ }
+
+ p0->error = error_node->errors[error0];
+ if (PREDICT_TRUE(error0 == SIXRD_ERROR_NONE)) decap++;
+ 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);
+ }
+ vlib_node_increment_counter(vm, ip4_sixrd_node.index, SIXRD_ERROR_DECAPSULATED, decap);
+
+ return frame->n_vectors;
+}
+
+static char *sixrd_error_strings[] = {
+#define _(sym,string) string,
+ foreach_sixrd_error
+#undef _
+};
+
+VLIB_REGISTER_NODE(ip4_sixrd_node,static) = {
+ .function = ip4_sixrd,
+ .name = "ip4-sixrd",
+ .vector_size = sizeof(u32),
+ .format_trace = format_sixrd_trace,
+ .n_errors = SIXRD_N_ERROR,
+ .error_strings = sixrd_error_strings,
+ .n_next_nodes = IP4_SIXRD_N_NEXT,
+ .next_nodes = {
+ [IP4_SIXRD_NEXT_IP6_LOOKUP] = "ip6-lookup",
+ [IP4_SIXRD_NEXT_DROP] = "error-drop",
+ },
+};
diff --git a/src/plugins/sixrd/ip6_sixrd.c b/src/plugins/sixrd/ip6_sixrd.c
new file mode 100644
index 00000000..36f3fab3
--- /dev/null
+++ b/src/plugins/sixrd/ip6_sixrd.c
@@ -0,0 +1,129 @@
+/*---------------------------------------------------------------------------
+ * Copyright (c) 2009-2014 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 SIXRD_ENCAP_DUAL 0
+
+#include "sixrd.h"
+
+static vlib_node_registration_t ip6_sixrd_node;
+
+typedef enum {
+ IP6_SIXRD_NEXT_IP4_LOOKUP,
+ IP6_SIXRD_NEXT_DROP,
+ IP6_SIXRD_N_NEXT,
+} ip6_sixrd_next_t;
+
+/*
+ * ip6_sixrd
+ */
+static uword
+ip6_sixrd (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, ip6_sixrd_node.index);
+ u32 encap = 0;
+ 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 > 0 && n_left_to_next > 0) {
+ u32 pi0;
+ vlib_buffer_t *p0;
+ sixrd_domain_t *d0;
+ u8 error0 = SIXRD_ERROR_NONE;
+ ip6_header_t *ip60;
+ ip4_header_t *ip4h0;
+ u32 next0 = IP6_SIXRD_NEXT_IP4_LOOKUP;
+ u32 sixrd_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);
+ ip60 = vlib_buffer_get_current(p0);
+ // p0->current_length = clib_net_to_host_u16(ip40->length);
+ d0 = ip6_sixrd_get_domain(vnet_buffer(p0)->ip.adj_index[VLIB_TX], &sixrd_domain_index0);
+ ASSERT(d0);
+
+ /* SIXRD calc */
+ u64 dal60 = clib_net_to_host_u64(ip60->dst_address.as_u64[0]);
+ u32 da40 = sixrd_get_addr(d0, dal60);
+ u16 len = clib_net_to_host_u16(ip60->payload_length) + 60;
+ if (da40 == 0) error0 = SIXRD_ERROR_UNKNOWN;
+
+ /* construct ipv4 header */
+ vlib_buffer_advance(p0, - (sizeof(ip4_header_t)));
+ ip4h0 = vlib_buffer_get_current(p0);
+ vnet_buffer(p0)->sw_if_index[VLIB_TX] = (u32)~0;
+ ip4h0->ip_version_and_header_length = 0x45;
+ ip4h0->tos = 0;
+ ip4h0->length = clib_host_to_net_u16(len);
+ ip4h0->fragment_id = 0;
+ ip4h0->flags_and_fragment_offset = 0;
+ ip4h0->ttl = 0x40;
+ ip4h0->protocol = IP_PROTOCOL_IPV6;
+ ip4h0->src_address = d0->ip4_src;
+ ip4h0->dst_address.as_u32 = clib_host_to_net_u32(da40);
+ ip4h0->checksum = ip4_header_checksum(ip4h0);
+
+ next0 = error0 == SIXRD_ERROR_NONE ? IP6_SIXRD_NEXT_IP4_LOOKUP : IP6_SIXRD_NEXT_DROP;
+
+ if (PREDICT_FALSE(p0->flags & VLIB_BUFFER_IS_TRACED)) {
+ sixrd_trace_t *tr = vlib_add_trace(vm, node, p0, sizeof(*tr));
+ tr->sixrd_domain_index = sixrd_domain_index0;
+ }
+
+ p0->error = error_node->errors[error0];
+ if (PREDICT_TRUE(error0 == SIXRD_ERROR_NONE)) encap++;
+
+ 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);
+ }
+ vlib_node_increment_counter(vm, ip6_sixrd_node.index, SIXRD_ERROR_ENCAPSULATED, encap);
+
+ return frame->n_vectors;
+}
+
+static char *sixrd_error_strings[] = {
+#define _(sym,string) string,
+ foreach_sixrd_error
+#undef _
+};
+
+VLIB_REGISTER_NODE(ip6_sixrd_node,static) = {
+ .function = ip6_sixrd,
+ .name = "ip6-sixrd",
+ .vector_size = sizeof(u32),
+ .format_trace = format_sixrd_trace,
+ .n_errors = SIXRD_N_ERROR,
+ .error_strings = sixrd_error_strings,
+ .n_next_nodes = IP6_SIXRD_N_NEXT,
+ .next_nodes = {
+ [IP6_SIXRD_NEXT_IP4_LOOKUP] = "ip4-lookup",
+ [IP6_SIXRD_NEXT_DROP] = "error-drop",
+ },
+};
diff --git a/src/plugins/sixrd/sixrd.c b/src/plugins/sixrd/sixrd.c
new file mode 100644
index 00000000..98387525
--- /dev/null
+++ b/src/plugins/sixrd/sixrd.c
@@ -0,0 +1,377 @@
+/*
+ * 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.
+ */
+
+#include "sixrd.h"
+#include <vnet/plugin/plugin.h>
+
+#include <vnet/fib/fib_table.h>
+#include <vnet/fib/ip6_fib.h>
+#include <vnet/adj/adj.h>
+#include <vpp/app/version.h>
+
+/*
+ * This code supports the following sixrd modes:
+ *
+ * 32 EA bits (Complete IPv4 address is embedded):
+ * ea_bits_len = 32
+ * IPv4 suffix is embedded:
+ * ea_bits_len = < 32
+ * No embedded address bits (1:1 mode):
+ * ea_bits_len = 0
+ */
+
+int
+sixrd_create_domain (ip6_address_t *ip6_prefix,
+ u8 ip6_prefix_len,
+ ip4_address_t *ip4_prefix,
+ u8 ip4_prefix_len,
+ ip4_address_t *ip4_src,
+ u32 *sixrd_domain_index,
+ u16 mtu)
+{
+ dpo_id_t dpo_v6 = DPO_INVALID, dpo_v4 = DPO_INVALID;
+ sixrd_main_t *mm = &sixrd_main;
+ fib_node_index_t fei;
+ sixrd_domain_t *d;
+
+ /* Get domain index */
+ pool_get_aligned(mm->domains, d, CLIB_CACHE_LINE_BYTES);
+ memset(d, 0, sizeof (*d));
+ *sixrd_domain_index = d - mm->domains;
+
+ /* Init domain struct */
+ d->ip4_prefix.as_u32 = ip4_prefix->as_u32;
+ d->ip4_prefix_len = ip4_prefix_len;
+ d->ip6_prefix = *ip6_prefix;
+ d->ip6_prefix_len = ip6_prefix_len;
+ d->ip4_src = *ip4_src;
+ d->mtu = mtu;
+
+ if (ip4_prefix_len < 32)
+ d->shift = 64 - ip6_prefix_len + (32 - ip4_prefix_len);
+
+ /* Create IPv6 route/adjacency */
+ fib_prefix_t pfx6 = {
+ .fp_proto = FIB_PROTOCOL_IP6,
+ .fp_len = d->ip6_prefix_len,
+ .fp_addr = {
+ .ip6 = d->ip6_prefix,
+ },
+ };
+ sixrd_dpo_create(DPO_PROTO_IP6,
+ *sixrd_domain_index,
+ &dpo_v6);
+ fib_table_entry_special_dpo_add(0, &pfx6,
+ FIB_SOURCE_SIXRD,
+ FIB_ENTRY_FLAG_EXCLUSIVE,
+ &dpo_v6);
+ dpo_reset (&dpo_v6);
+
+ /*
+ * Multiple SIXRD domains may share same source IPv4 TEP
+ * In this case the route will exist and be SixRD sourced.
+ * Find the adj (if any) already contributed and modify it
+ */
+ fib_prefix_t pfx4 = {
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_len = 32,
+ .fp_addr = {
+ .ip4 = d->ip4_src,
+ },
+ };
+ fei = fib_table_lookup_exact_match(0, &pfx4);
+
+ if (FIB_NODE_INDEX_INVALID != fei)
+ {
+ dpo_id_t dpo = DPO_INVALID;
+
+ if (fib_entry_get_dpo_for_source (fei, FIB_SOURCE_SIXRD, &dpo))
+ {
+ /*
+ * modify the existing adj to indicate it's shared
+ * skip to route add.
+ * It is locked to pair with the unlock below.
+ */
+ const dpo_id_t *sd_dpo;
+ sixrd_dpo_t *sd;
+
+ ASSERT(DPO_LOAD_BALANCE == dpo.dpoi_type);
+
+ sd_dpo = load_balance_get_bucket(dpo.dpoi_index, 0);
+ sd = sixrd_dpo_get (sd_dpo->dpoi_index);
+
+ sd->sd_domain = ~0;
+ dpo_copy (&dpo_v4, sd_dpo);
+ dpo_reset (&dpo);
+
+ goto route_add;
+ }
+ }
+ /* first time addition of the route */
+ sixrd_dpo_create(DPO_PROTO_IP4,
+ *sixrd_domain_index,
+ &dpo_v4);
+
+route_add:
+ /*
+ * Create ip4 route. This is a reference counted add. If the prefix
+ * already exists and is SixRD sourced, it is now SixRD source n+1 times
+ * and will need to be removed n+1 times.
+ */
+ fib_table_entry_special_dpo_add(0, &pfx4,
+ FIB_SOURCE_SIXRD,
+ FIB_ENTRY_FLAG_EXCLUSIVE,
+ &dpo_v4);
+ dpo_reset (&dpo_v4);
+
+ return 0;
+}
+
+/*
+ * sixrd_delete_domain
+ */
+int
+sixrd_delete_domain (u32 sixrd_domain_index)
+{
+ sixrd_main_t *mm = &sixrd_main;
+ sixrd_domain_t *d;
+
+ if (pool_is_free_index(mm->domains, sixrd_domain_index)) {
+ clib_warning("SIXRD domain delete: domain does not exist: %d",
+ sixrd_domain_index);
+ return -1;
+ }
+
+ d = pool_elt_at_index(mm->domains, sixrd_domain_index);
+
+ fib_prefix_t pfx = {
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_len = 32,
+ .fp_addr = {
+ .ip4 = d->ip4_src,
+ },
+ };
+ fib_table_entry_special_remove(0, &pfx, FIB_SOURCE_SIXRD);
+
+ fib_prefix_t pfx6 = {
+ .fp_proto = FIB_PROTOCOL_IP6,
+ .fp_len = d->ip6_prefix_len,
+ .fp_addr = {
+ .ip6 = d->ip6_prefix,
+ },
+ };
+ fib_table_entry_special_remove(0, &pfx6, FIB_SOURCE_SIXRD);
+
+ pool_put(mm->domains, d);
+
+ return 0;
+}
+
+static clib_error_t *
+sixrd_add_domain_command_fn (vlib_main_t *vm,
+ unformat_input_t *input,
+ vlib_cli_command_t *cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ ip4_address_t ip4_prefix;
+ ip6_address_t ip6_prefix;
+ ip4_address_t ip4_src;
+ u32 ip6_prefix_len=0, ip4_prefix_len=0, sixrd_domain_index;
+ u32 num_m_args = 0;
+ /* Optional arguments */
+ u32 mtu = 0;
+ clib_error_t *error = 0;
+
+ /* Get a line of input. */
+ 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, "ip6-pfx %U/%d", unformat_ip6_address, &ip6_prefix, &ip6_prefix_len))
+ num_m_args++;
+ else if (unformat(line_input, "ip4-pfx %U/%d", unformat_ip4_address, &ip4_prefix, &ip4_prefix_len))
+ num_m_args++;
+ else if (unformat(line_input, "ip4-src %U", unformat_ip4_address, &ip4_src))
+ num_m_args++;
+ else if (unformat(line_input, "mtu %d", &mtu))
+ num_m_args++;
+ else {
+ error = clib_error_return(0, "unknown input `%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ if (num_m_args < 3) {
+ error = clib_error_return(0, "mandatory argument(s) missing");
+ goto done;
+ }
+
+ sixrd_create_domain(&ip6_prefix, ip6_prefix_len, &ip4_prefix, ip4_prefix_len,
+ &ip4_src, &sixrd_domain_index, mtu);
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+static clib_error_t *
+sixrd_del_domain_command_fn (vlib_main_t *vm,
+ unformat_input_t *input,
+ vlib_cli_command_t *cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ u32 num_m_args = 0;
+ u32 sixrd_domain_index;
+ clib_error_t *error = 0;
+
+ /* Get a line of input. */
+ 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, "index %d", &sixrd_domain_index))
+ num_m_args++;
+ else {
+ error = clib_error_return(0, "unknown input `%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ if (num_m_args != 1) {
+ error = clib_error_return(0, "mandatory argument(s) missing");
+ goto done;
+ }
+
+ sixrd_delete_domain(sixrd_domain_index);
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+static u8 *
+format_sixrd_domain (u8 *s, va_list *args)
+{
+ sixrd_domain_t *d = va_arg(*args, sixrd_domain_t *);
+ sixrd_main_t *mm = &sixrd_main;
+
+ s = format(s,
+ "[%d] ip6-pfx %U/%d ip4-pfx %U/%d ip4-src %U mtu %d",
+ d - mm->domains,
+ format_ip6_address, &d->ip6_prefix, d->ip6_prefix_len,
+ format_ip4_address, &d->ip4_prefix, d->ip4_prefix_len,
+ format_ip4_address, &d->ip4_src, d->mtu);
+
+ return s;
+}
+
+static clib_error_t *
+show_sixrd_domain_command_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
+{
+ sixrd_main_t *mm = &sixrd_main;
+ sixrd_domain_t *d;
+
+ if (pool_elts(mm->domains) == 0)
+ vlib_cli_output(vm, "No SIXRD domains are configured...");
+
+ pool_foreach(d, mm->domains, ({vlib_cli_output(vm, "%U", format_sixrd_domain, d);}));
+
+ return 0;
+
+}
+
+static clib_error_t *
+show_sixrd_stats_command_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
+{
+ sixrd_main_t *mm = &sixrd_main;
+ sixrd_domain_t *d;
+ int domains = 0, domaincount = 0;
+ if (pool_elts (mm->domains) == 0)
+ vlib_cli_output (vm, "No SIXRD domains are configured...");
+
+ pool_foreach(d, mm->domains, ({
+ domains += sizeof(*d);
+ domaincount++;
+ }));
+
+ vlib_cli_output(vm, "SIXRD domains structure: %d\n", sizeof (sixrd_domain_t));
+ vlib_cli_output(vm, "SIXRD domains: %d (%d bytes)\n", domaincount, domains);
+
+ return 0;
+}
+
+/*
+ * packet trace format function
+ */
+u8 *
+format_sixrd_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 *);
+ sixrd_trace_t *t = va_arg (*args, sixrd_trace_t *);
+ u32 sixrd_domain_index = t->sixrd_domain_index;
+
+ s = format(s, "SIXRD domain index: %d", sixrd_domain_index);
+
+ return s;
+}
+
+VLIB_CLI_COMMAND(sixrd_add_domain_command, static) = {
+ .path = "sixrd add domain",
+ .short_help =
+ "sixrd add domain ip6-pfx <ip6-pfx> ip4-pfx <ip4-pfx> ip4-src <ip4-addr>",
+ .function = sixrd_add_domain_command_fn,
+};
+
+VLIB_CLI_COMMAND(sixrd_del_command, static) = {
+ .path = "sixrd del domain",
+ .short_help =
+ "sixrd del domain index <domain>",
+ .function = sixrd_del_domain_command_fn,
+};
+
+VLIB_CLI_COMMAND(show_sixrd_domain_command, static) = {
+ .path = "show sixrd domain",
+ .function = show_sixrd_domain_command_fn,
+};
+
+VLIB_CLI_COMMAND(show_sixrd_stats_command, static) = {
+ .path = "show sixrd stats",
+ .function = show_sixrd_stats_command_fn,
+};
+
+/* *INDENT-OFF* */
+VLIB_PLUGIN_REGISTER () ={
+ .version = VPP_BUILD_VER,
+ .description = "IPv6 Rapid Deployment on IPv4 Infrastructure (RFC5969)",
+};
+/* *INDENT-ON* */
+
+static clib_error_t * sixrd_init (vlib_main_t * vm)
+{
+ sixrd_main_t *mm = &sixrd_main;
+
+ mm->vnet_main = vnet_get_main();
+ mm->vlib_main = vm;
+
+ sixrd_dpo_module_init ();
+
+ return (NULL);
+}
+
+VLIB_INIT_FUNCTION (sixrd_init);
diff --git a/src/plugins/sixrd/sixrd.h b/src/plugins/sixrd/sixrd.h
new file mode 100644
index 00000000..56714c9e
--- /dev/null
+++ b/src/plugins/sixrd/sixrd.h
@@ -0,0 +1,141 @@
+/*---------------------------------------------------------------------------
+ * Copyright (c) 2009-2014 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 <stdbool.h>
+#include <vppinfra/error.h>
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/fib/ip6_fib.h>
+
+#include "sixrd_dpo.h"
+
+int sixrd_create_domain(ip6_address_t *ip6_prefix, u8 ip6_prefix_len,
+ ip4_address_t *ip4_prefix, u8 ip4_prefix_len,
+ ip4_address_t *ip4_src, u32 *sixrd_domain_index, u16 mtu);
+int sixrd_delete_domain(u32 sixrd_domain_index);
+u8 *format_sixrd_trace(u8 *s, va_list *args);
+
+typedef struct {
+ ip6_address_t ip6_prefix;
+ ip4_address_t ip4_prefix;
+ ip4_address_t ip4_src;
+ u8 ip6_prefix_len;
+ u8 ip4_prefix_len;
+
+ /* helpers */
+ u8 shift;
+
+ u16 mtu;
+} sixrd_domain_t;
+
+typedef struct {
+ /* pool of SIXRD domains */
+ sixrd_domain_t *domains;
+
+ /* convenience */
+ vlib_main_t *vlib_main;
+ vnet_main_t *vnet_main;
+} sixrd_main_t;
+
+#define foreach_sixrd_error \
+ /* Must be first. */ \
+ _(NONE, "valid SIXRD packets") \
+ _(BAD_PROTOCOL, "bad protocol") \
+ _(WRONG_ICMP_TYPE, "wrong icmp type") \
+ _(SEC_CHECK, "security check failed") \
+ _(ICMP, "unable to translate ICMP") \
+ _(UNKNOWN, "unknown") \
+ _(NO_DOMAIN, "no domain") \
+ _(ENCAPSULATED, "encapsulated") \
+ _(DECAPSULATED, "decapsulated") \
+ _(TRANSLATED_4TO6, "translated 4 to 6") \
+ _(TRANSLATED_6TO4, "translated 6 to 4") \
+ _(FRAGMENT, "fragment handling error") \
+ _(FRAGMENT_QUEUED, "dropped, missing first fragment") \
+ _(FRAGMENTED, "packets requiring fragmentation") \
+ _(FRAGMENT_PARTS, "fragment parts") \
+ _(MALFORMED, "malformed packet")
+
+typedef enum {
+#define _(sym,str) SIXRD_ERROR_##sym,
+ foreach_sixrd_error
+#undef _
+ SIXRD_N_ERROR,
+ } sixrd_error_t;
+
+typedef struct {
+ u32 sixrd_domain_index;
+} sixrd_trace_t;
+
+sixrd_main_t sixrd_main;
+
+/*
+ * sixrd_get_addr
+ */
+static_always_inline u32
+sixrd_get_addr (sixrd_domain_t *d, u64 dal)
+{
+
+ /* 1:1 mode */
+ if (d->ip4_prefix_len == 32) return (d->ip4_prefix.as_u32);
+
+ /* Grab 32 - ip4_prefix_len bits out of IPv6 address from offset ip6_prefix_len */
+ return (d->ip4_prefix.as_u32 | (u32)(dal >> d->shift));
+}
+
+/*
+ * Get the SIXRD domain from an IPv6 lookup adjacency.
+ */
+static_always_inline sixrd_domain_t *
+ip6_sixrd_get_domain (u32 sdi, u32 *sixrd_domain_index)
+{
+ sixrd_main_t *mm = &sixrd_main;
+ sixrd_dpo_t *sd;
+
+ sd = sixrd_dpo_get(sdi);
+
+ ASSERT(sd);
+ *sixrd_domain_index = sd->sd_domain;
+ return pool_elt_at_index(mm->domains, *sixrd_domain_index);
+}
+
+/*
+ * Get the SIXRD domain from an IPv4 lookup adjacency.
+ * If the IPv4 address is not shared, no lookup is required.
+ * The IPv6 address is used otherwise.
+ */
+static_always_inline sixrd_domain_t *
+ip4_sixrd_get_domain (u32 sdi, ip6_address_t *addr,
+ u32 *sixrd_domain_index, u8 *error)
+{
+ sixrd_main_t *mm = &sixrd_main;
+ sixrd_dpo_t *sd;
+
+ sd = sixrd_dpo_get(sdi);
+ *sixrd_domain_index = sd->sd_domain;
+ if (*sixrd_domain_index != ~0)
+ return pool_elt_at_index(mm->domains, *sixrd_domain_index);
+
+ u32 lbi = ip6_fib_table_fwding_lookup(&ip6_main, 0, addr);
+ const dpo_id_t *dpo = load_balance_get_bucket(lbi, 0);
+ if (PREDICT_TRUE(dpo->dpoi_type == sixrd_dpo_type))
+ {
+ sd = sixrd_dpo_get(dpo->dpoi_index);
+ *sixrd_domain_index = sd->sd_domain;
+ return pool_elt_at_index(mm->domains, *sixrd_domain_index);
+ }
+ *error = SIXRD_ERROR_NO_DOMAIN;
+ return NULL;
+}
diff --git a/src/plugins/sixrd/sixrd_dpo.c b/src/plugins/sixrd/sixrd_dpo.c
new file mode 100644
index 00000000..88a07935
--- /dev/null
+++ b/src/plugins/sixrd/sixrd_dpo.c
@@ -0,0 +1,132 @@
+/*
+ * 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 "sixrd_dpo.h"
+#include <vnet/ip/ip.h>
+
+/**
+ * pool of all MPLS Label DPOs
+ */
+sixrd_dpo_t *sixrd_dpo_pool;
+
+/**
+ * The register SIXRD DPO type
+ */
+dpo_type_t sixrd_dpo_type;
+
+static sixrd_dpo_t *
+sixrd_dpo_alloc (void)
+{
+ sixrd_dpo_t *sd;
+
+ pool_get_aligned(sixrd_dpo_pool, sd, CLIB_CACHE_LINE_BYTES);
+ memset(sd, 0, sizeof(*sd));
+
+ return (sd);
+}
+
+static index_t
+sixrd_dpo_get_index (sixrd_dpo_t *sd)
+{
+ return (sd - sixrd_dpo_pool);
+}
+
+void
+sixrd_dpo_create (dpo_proto_t dproto,
+ u32 domain_index,
+ dpo_id_t *dpo)
+{
+ sixrd_dpo_t *sd;
+
+ sd = sixrd_dpo_alloc();
+ sd->sd_domain = domain_index;
+ sd->sd_proto = dproto;
+
+ dpo_set(dpo,
+ sixrd_dpo_type,
+ dproto,
+ sixrd_dpo_get_index(sd));
+}
+
+u8*
+format_sixrd_dpo (u8 *s, va_list *args)
+{
+ index_t index = va_arg (*args, index_t);
+ CLIB_UNUSED(u32 indent) = va_arg (*args, u32);
+ sixrd_dpo_t *sd;
+
+ sd = sixrd_dpo_get(index);
+
+ return (format(s, "sixrd:[%d]:%U domain:%d",
+ index,
+ format_dpo_proto, sd->sd_proto,
+ sd->sd_domain));
+}
+
+
+static void
+sixrd_dpo_lock (dpo_id_t *dpo)
+{
+ sixrd_dpo_t *sd;
+
+ sd = sixrd_dpo_get(dpo->dpoi_index);
+
+ sd->sd_locks++;
+}
+
+static void
+sixrd_dpo_unlock (dpo_id_t *dpo)
+{
+ sixrd_dpo_t *sd;
+
+ sd = sixrd_dpo_get(dpo->dpoi_index);
+
+ sd->sd_locks--;
+
+ if (0 == sd->sd_locks)
+ {
+ pool_put(sixrd_dpo_pool, sd);
+ }
+}
+
+const static dpo_vft_t sd_vft = {
+ .dv_lock = sixrd_dpo_lock,
+ .dv_unlock = sixrd_dpo_unlock,
+ .dv_format = format_sixrd_dpo,
+};
+
+const static char* const sixrd_ip4_nodes[] =
+{
+ "ip4-sixrd",
+ NULL,
+};
+const static char* const sixrd_ip6_nodes[] =
+{
+ "ip6-sixrd",
+ NULL,
+};
+
+const static char* const * const sixrd_nodes[DPO_PROTO_NUM] =
+{
+ [DPO_PROTO_IP4] = sixrd_ip4_nodes,
+ [DPO_PROTO_IP6] = sixrd_ip6_nodes,
+ [DPO_PROTO_MPLS] = NULL,
+};
+
+void
+sixrd_dpo_module_init (void)
+{
+ sixrd_dpo_type = dpo_register_new_type(&sd_vft, sixrd_nodes);
+}
diff --git a/src/plugins/sixrd/sixrd_dpo.h b/src/plugins/sixrd/sixrd_dpo.h
new file mode 100644
index 00000000..17142288
--- /dev/null
+++ b/src/plugins/sixrd/sixrd_dpo.h
@@ -0,0 +1,61 @@
+/*
+ * 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.
+ */
+
+#ifndef __SIXRD_DPO_H__
+#define __SIXRD_DPO_H__
+
+#include <vnet/vnet.h>
+#include <vnet/dpo/dpo.h>
+
+/**
+ * A representation of a 6RD DPO
+ */
+typedef struct sixrd_dpo_t
+{
+ /**
+ * The dat-plane protocol
+ */
+ dpo_proto_t sd_proto;
+
+ /**
+ * the SIXRD domain index
+ */
+ u32 sd_domain;
+
+ /**
+ * Number of locks/users of the label
+ */
+ u16 sd_locks;
+} sixrd_dpo_t;
+
+extern void sixrd_dpo_create (dpo_proto_t dproto,
+ u32 domain_index,
+ dpo_id_t *dpo);
+
+/*
+ * Encapsulation violation for fast data-path access
+ */
+extern sixrd_dpo_t *sixrd_dpo_pool;
+extern dpo_type_t sixrd_dpo_type;
+
+static inline sixrd_dpo_t *
+sixrd_dpo_get (index_t index)
+{
+ return (pool_elt_at_index(sixrd_dpo_pool, index));
+}
+
+extern void sixrd_dpo_module_init(void);
+
+#endif