diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/configure.ac | 1 | ||||
| -rw-r--r-- | src/plugins/Makefile.am | 4 | ||||
| -rw-r--r-- | src/plugins/srv6-ad/ad.c | 358 | ||||
| -rw-r--r-- | src/plugins/srv6-ad/ad.h | 77 | ||||
| -rw-r--r-- | src/plugins/srv6-ad/ad_plugin_doc.md | 23 | ||||
| -rw-r--r-- | src/plugins/srv6-ad/node.c | 521 | ||||
| -rw-r--r-- | src/plugins/srv6_ad.am | 22 |
7 files changed, 1006 insertions, 0 deletions
diff --git a/src/configure.ac b/src/configure.ac index 80a0fb0ad59..2b0d22607ce 100644 --- a/src/configure.ac +++ b/src/configure.ac @@ -221,6 +221,7 @@ PLUGIN_ENABLED(marvell) PLUGIN_ENABLED(memif) PLUGIN_ENABLED(pppoe) PLUGIN_ENABLED(sixrd) +PLUGIN_ENABLED(srv6ad) PLUGIN_ENABLED(srv6am) PLUGIN_ENABLED(srv6as) PLUGIN_ENABLED(nat) diff --git a/src/plugins/Makefile.am b/src/plugins/Makefile.am index 589262e23df..c2621e4aa78 100644 --- a/src/plugins/Makefile.am +++ b/src/plugins/Makefile.am @@ -83,6 +83,10 @@ if ENABLE_SIXRD_PLUGIN include sixrd.am endif +if ENABLE_SRV6AD_PLUGIN +include srv6_ad.am +endif + if ENABLE_SRV6AM_PLUGIN include srv6_am.am endif diff --git a/src/plugins/srv6-ad/ad.c b/src/plugins/srv6-ad/ad.c new file mode 100644 index 00000000000..b6f872d4d25 --- /dev/null +++ b/src/plugins/srv6-ad/ad.c @@ -0,0 +1,358 @@ +/* + * 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. + */ +/* + *------------------------------------------------------------------ + * ad.c - SRv6 Dynamic Proxy (AD) function + *------------------------------------------------------------------ + */ + +#include <vnet/vnet.h> +#include <vnet/adj/adj.h> +#include <vnet/plugin/plugin.h> +#include <vpp/app/version.h> +#include <srv6-ad/ad.h> + +unsigned char function_name[] = "SRv6-AD-plugin"; +unsigned char keyword_str[] = "End.AD"; +unsigned char def_str[] = + "Endpoint with dynamic proxy to SR-unaware appliance"; +unsigned char params_str[] = "nh <next-hop> oif <iface-out> iif <iface-in>"; + + +/*****************************************/ +/* SRv6 LocalSID instantiation and removal functions */ +static int +srv6_ad_localsid_creation_fn (ip6_sr_localsid_t * localsid) +{ + ip6_sr_main_t *srm = &sr_main; + srv6_ad_main_t *sm = &srv6_ad_main; + srv6_ad_localsid_t *ls_mem = localsid->plugin_mem; + u32 localsid_index = localsid - srm->localsids; + + /* Step 1: Prepare xconnect adjacency for sending packets to the VNF */ + + /* Retrieve the adjacency corresponding to the (OIF, next_hop) */ + adj_index_t nh_adj_index = ADJ_INDEX_INVALID; + if (ls_mem->ip_version == DA_IP4) + nh_adj_index = adj_nbr_add_or_lock (FIB_PROTOCOL_IP4, + VNET_LINK_IP4, &ls_mem->nh_addr, + ls_mem->sw_if_index_out); + else if (ls_mem->ip_version == DA_IP6) + nh_adj_index = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6, + VNET_LINK_IP6, &ls_mem->nh_addr, + ls_mem->sw_if_index_out); + if (nh_adj_index == ADJ_INDEX_INVALID) + return -5; + + ls_mem->nh_adj = nh_adj_index; + + + /* Step 2: Prepare inbound policy for packets returning from the VNF */ + + /* Sanitise the SW_IF_INDEX */ + if (pool_is_free_index (sm->vnet_main->interface_main.sw_interfaces, + ls_mem->sw_if_index_in)) + return -3; + + vnet_sw_interface_t *sw = vnet_get_sw_interface (sm->vnet_main, + ls_mem->sw_if_index_in); + if (sw->type != VNET_SW_INTERFACE_TYPE_HARDWARE) + return -3; + + int ret = -1; + if (ls_mem->ip_version == DA_IP4) + { + ret = vnet_feature_enable_disable ("ip4-unicast", "srv6-ad4-rewrite", + ls_mem->sw_if_index_in, 1, 0, 0); + if (ret != 0) + return -1; + + /* FIB API calls - Recursive route through the BindingSID */ + if (ls_mem->sw_if_index_in < vec_len (sm->sw_iface_localsid4)) + { + sm->sw_iface_localsid4[ls_mem->sw_if_index_in] = localsid_index; + } + else + { + vec_resize (sm->sw_iface_localsid4, + (pool_len (sm->vnet_main->interface_main.sw_interfaces) + - vec_len (sm->sw_iface_localsid4))); + sm->sw_iface_localsid4[ls_mem->sw_if_index_in] = localsid_index; + } + } + else if (ls_mem->ip_version == DA_IP6) + { + ret = vnet_feature_enable_disable ("ip6-unicast", "srv6-ad6-rewrite", + ls_mem->sw_if_index_in, 1, 0, 0); + if (ret != 0) + return -1; + + if (ls_mem->sw_if_index_in < vec_len (sm->sw_iface_localsid6)) + { + sm->sw_iface_localsid6[ls_mem->sw_if_index_in] = localsid_index; + } + else + { + vec_resize (sm->sw_iface_localsid6, + (pool_len (sm->vnet_main->interface_main.sw_interfaces) + - vec_len (sm->sw_iface_localsid6))); + sm->sw_iface_localsid6[ls_mem->sw_if_index_in] = localsid_index; + } + } + + return 0; +} + +static int +srv6_ad_localsid_removal_fn (ip6_sr_localsid_t * localsid) +{ + srv6_ad_main_t *sm = &srv6_ad_main; + srv6_ad_localsid_t *ls_mem = localsid->plugin_mem; + + int ret = -1; + if (ls_mem->ip_version == DA_IP4) + { + /* Remove hardware indirection (from sr_steering.c:137) */ + ret = vnet_feature_enable_disable ("ip4-unicast", "srv6-ad4-rewrite", + ls_mem->sw_if_index_in, 0, 0, 0); + if (ret != 0) + return -1; + + /* Remove local SID pointer from interface table (from sr_steering.c:139) */ + sm->sw_iface_localsid4[ls_mem->sw_if_index_in] = ~(u32) 0; + } + else if (ls_mem->ip_version == DA_IP6) + { + /* Remove hardware indirection (from sr_steering.c:137) */ + ret = vnet_feature_enable_disable ("ip6-unicast", "srv6-ad6-rewrite", + ls_mem->sw_if_index_in, 0, 0, 0); + if (ret != 0) + return -1; + + /* Remove local SID pointer from interface table (from sr_steering.c:139) */ + sm->sw_iface_localsid6[ls_mem->sw_if_index_in] = ~(u32) 0; + } + + + /* Unlock (OIF, NHOP) adjacency (from sr_localsid.c:103) */ + adj_unlock (ls_mem->nh_adj); + + /* Clean up local SID memory */ + clib_mem_free (localsid->plugin_mem); + + return 0; +} + +/**********************************/ +/* SRv6 LocalSID format functions */ +/* + * Prints nicely the parameters of a localsid + * Example: print "Table 5" + */ +u8 * +format_srv6_ad_localsid (u8 * s, va_list * args) +{ + srv6_ad_localsid_t *ls_mem = va_arg (*args, void *); + + vnet_main_t *vnm = vnet_get_main (); + + if (ls_mem->ip_version == DA_IP4) + { + return (format (s, + "Next-hop:\t%U\n" + "\tOutgoing iface: %U\n" + "\tIncoming iface: %U", + format_ip4_address, &ls_mem->nh_addr.ip4, + format_vnet_sw_if_index_name, vnm, + ls_mem->sw_if_index_out, format_vnet_sw_if_index_name, + vnm, ls_mem->sw_if_index_in)); + } + else + { + return (format (s, + "Next-hop:\t%U\n" + "\tOutgoing iface: %U\n" + "\tIncoming iface: %U", + format_ip6_address, &ls_mem->nh_addr.ip6, + format_vnet_sw_if_index_name, vnm, + ls_mem->sw_if_index_out, format_vnet_sw_if_index_name, + vnm, ls_mem->sw_if_index_in)); + } +} + +/* + * Process the parameters of a localsid + * Example: process from: + * sr localsid address cafe::1 behavior new_srv6_localsid 5 + * everything from behavior on... so in this case 'new_srv6_localsid 5' + * Notice that it MUST match the keyword_str and params_str defined above. + */ +uword +unformat_srv6_ad_localsid (unformat_input_t * input, va_list * args) +{ + void **plugin_mem_p = va_arg (*args, void **); + srv6_ad_localsid_t *ls_mem; + + vnet_main_t *vnm = vnet_get_main (); + + ip46_address_t nh_addr; + u32 sw_if_index_out; + u32 sw_if_index_in; + + if (unformat (input, "end.ad nh %U oif %U iif %U", + unformat_ip4_address, &nh_addr.ip4, + unformat_vnet_sw_interface, vnm, &sw_if_index_out, + unformat_vnet_sw_interface, vnm, &sw_if_index_in)) + { + /* Allocate a portion of memory */ + ls_mem = clib_mem_alloc_aligned_at_offset (sizeof *ls_mem, 0, 0, 1); + + /* Set to zero the memory */ + memset (ls_mem, 0, sizeof *ls_mem); + + /* Our brand-new car is ready */ + ls_mem->ip_version = DA_IP4; + clib_memcpy (&ls_mem->nh_addr.ip4, &nh_addr.ip4, + sizeof (ip4_address_t)); + ls_mem->sw_if_index_out = sw_if_index_out; + ls_mem->sw_if_index_in = sw_if_index_in; + + /* Dont forget to add it to the localsid */ + *plugin_mem_p = ls_mem; + return 1; + } + else if (unformat (input, "end.ad nh %U oif %U iif %U", + unformat_ip6_address, &nh_addr.ip6, + unformat_vnet_sw_interface, vnm, &sw_if_index_out, + unformat_vnet_sw_interface, vnm, &sw_if_index_in)) + { + /* Allocate a portion of memory */ + ls_mem = clib_mem_alloc_aligned_at_offset (sizeof *ls_mem, 0, 0, 1); + + /* Set to zero the memory */ + memset (ls_mem, 0, sizeof *ls_mem); + + /* Our brand-new car is ready */ + ls_mem->ip_version = DA_IP6; + clib_memcpy (&ls_mem->nh_addr.ip6, &nh_addr.ip6, + sizeof (ip6_address_t)); + ls_mem->sw_if_index_out = sw_if_index_out; + ls_mem->sw_if_index_in = sw_if_index_in; + + /* Dont forget to add it to the localsid */ + *plugin_mem_p = ls_mem; + return 1; + } + return 0; +} + +/*************************/ +/* SRv6 LocalSID FIB DPO */ +static u8 * +format_srv6_ad_dpo (u8 * s, va_list * args) +{ + index_t index = va_arg (*args, index_t); + CLIB_UNUSED (u32 indent) = va_arg (*args, u32); + + return (format (s, "SR: dynamic_proxy_index:[%u]", index)); +} + +void +srv6_ad_dpo_lock (dpo_id_t * dpo) +{ +} + +void +srv6_ad_dpo_unlock (dpo_id_t * dpo) +{ +} + +const static dpo_vft_t srv6_ad_vft = { + .dv_lock = srv6_ad_dpo_lock, + .dv_unlock = srv6_ad_dpo_unlock, + .dv_format = format_srv6_ad_dpo, +}; + +const static char *const srv6_ad_ip6_nodes[] = { + "srv6-ad-localsid", + NULL, +}; + +const static char *const *const srv6_ad_nodes[DPO_PROTO_NUM] = { + [DPO_PROTO_IP6] = srv6_ad_ip6_nodes, +}; + +/**********************/ +static clib_error_t * +srv6_ad_init (vlib_main_t * vm) +{ + srv6_ad_main_t *sm = &srv6_ad_main; + int rv = 0; + + sm->vlib_main = vm; + sm->vnet_main = vnet_get_main (); + + /* Create DPO */ + sm->srv6_ad_dpo_type = dpo_register_new_type (&srv6_ad_vft, srv6_ad_nodes); + + /* Register SRv6 LocalSID */ + rv = sr_localsid_register_function (vm, + function_name, + keyword_str, + def_str, + params_str, + &sm->srv6_ad_dpo_type, + format_srv6_ad_localsid, + unformat_srv6_ad_localsid, + srv6_ad_localsid_creation_fn, + srv6_ad_localsid_removal_fn); + if (rv < 0) + clib_error_return (0, "SRv6 LocalSID function could not be registered."); + else + sm->srv6_localsid_behavior_id = rv; + + return 0; +} + +/* *INDENT-OFF* */ +VNET_FEATURE_INIT (srv6_ad4_rewrite, static) = +{ + .arc_name = "ip4-unicast", + .node_name = "srv6-ad4-rewrite", + .runs_before = 0, +}; + +VNET_FEATURE_INIT (srv6_ad6_rewrite, static) = +{ + .arc_name = "ip6-unicast", + .node_name = "srv6-ad6-rewrite", + .runs_before = 0, +}; + +VLIB_INIT_FUNCTION (srv6_ad_init); + +VLIB_PLUGIN_REGISTER () = { + .version = VPP_BUILD_VER, + .description = "Dynamic SRv6 proxy", +}; +/* *INDENT-ON* */ + +/* +* fd.io coding-style-patch-verification: ON +* +* Local Variables: +* eval: (c-set-style "gnu") +* End: +*/ diff --git a/src/plugins/srv6-ad/ad.h b/src/plugins/srv6-ad/ad.h new file mode 100644 index 00000000000..851d3ed398f --- /dev/null +++ b/src/plugins/srv6-ad/ad.h @@ -0,0 +1,77 @@ +/* + * 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. + */ +#ifndef __included_srv6_ad_h__ +#define __included_srv6_ad_h__ + +#include <vnet/vnet.h> +#include <vnet/ip/ip.h> +#include <vnet/srv6/sr.h> +#include <vnet/srv6/sr_packet.h> + +#include <vppinfra/error.h> +#include <vppinfra/elog.h> + +#define DA_IP4 4 +#define DA_IP6 6 + +typedef struct +{ + u16 msg_id_base; /**< API message ID base */ + + vlib_main_t *vlib_main; /**< [convenience] vlib main */ + vnet_main_t *vnet_main; /**< [convenience] vnet main */ + + dpo_type_t srv6_ad_dpo_type; /**< DPO type */ + + u32 srv6_localsid_behavior_id; /**< SRv6 LocalSID behavior number */ + + u32 *sw_iface_localsid4; /**< Retrieve local SID from iface */ + u32 *sw_iface_localsid6; /**< Retrieve local SID from iface */ +} srv6_ad_main_t; + +/* + * This is the memory that will be stored per each localsid + * the user instantiates + */ +typedef struct +{ + ip46_address_t nh_addr; /**< Proxied device address */ + u32 sw_if_index_out; /**< Outgoing iface to proxied dev. */ + u32 nh_adj; /**< Adjacency index for out. iface */ + u8 ip_version; + + u32 sw_if_index_in; /**< Incoming iface from proxied dev. */ + u8 *rewrite; /**< Headers to be rewritten */ +} srv6_ad_localsid_t; + +srv6_ad_main_t srv6_ad_main; + +format_function_t format_srv6_ad_localsid; +unformat_function_t unformat_srv6_ad_localsid; + +void srv6_ad_dpo_lock (dpo_id_t * dpo); +void srv6_ad_dpo_unlock (dpo_id_t * dpo); + +extern vlib_node_registration_t srv6_ad_localsid_node; + +#endif /* __included_srv6_ad_h__ */ + +/* +* fd.io coding-style-patch-verification: ON +* +* Local Variables: +* eval: (c-set-style "gnu") +* End: +*/ diff --git a/src/plugins/srv6-ad/ad_plugin_doc.md b/src/plugins/srv6-ad/ad_plugin_doc.md new file mode 100644 index 00000000000..fc8ebfe352f --- /dev/null +++ b/src/plugins/srv6-ad/ad_plugin_doc.md @@ -0,0 +1,23 @@ +# SRv6 endpoint to SR-unaware appliance via dynamic proxy (End.AD) {#srv6_ad_plugin_doc} + +## Overview + +The "Endpoint to SR-unaware appliance via dynamic proxy" (End.AD) is a two-parts +proxy function for processing SRv6 encapsulated traffic on behalf of an +SR-unaware appliance. The first part decapsulates the incoming traffic and sends +it towards an appliance on a specific interface, while the second +re-encapsulates the traffic coming back from the appliance. + +In this scenario, there are no restrictions on the operations that can be +performed by the appliance on the stream of packets. It may operate at all +protocol layers, terminate transport layer connections, generate new packets and +initiate transport layer connections. This function may also be used to +integrate an IPv4-only appliance into an SRv6 policy. + +The End.AD function relies on a local caching mechanism to learn and +re-encapsulate the traffic with the same headers that were removed. +This cache is used to store the IPv6 header and its +extension headers while the appliance processes the inner packet. In the +following, we refer to an entry in this cache as C(type,iface), where type is +either IPv4 or IPv6 and iface is the receiving interface on the SRv6 proxy +(IFACE-IN). diff --git a/src/plugins/srv6-ad/node.c b/src/plugins/srv6-ad/node.c new file mode 100644 index 00000000000..73957f55ab6 --- /dev/null +++ b/src/plugins/srv6-ad/node.c @@ -0,0 +1,521 @@ +/* + * 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 <vlib/vlib.h> +#include <vnet/vnet.h> +#include <vppinfra/error.h> +#include <srv6-ad/ad.h> + + +/******************************* Packet tracing *******************************/ + +typedef struct +{ + u32 localsid_index; +} srv6_ad_localsid_trace_t; + +typedef struct +{ + ip6_address_t src, dst; +} srv6_ad_rewrite_trace_t; + +static u8 * +format_srv6_ad_localsid_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 *); + srv6_ad_localsid_trace_t *t = va_arg (*args, srv6_ad_localsid_trace_t *); + + return format (s, "SRv6-AD-localsid: localsid_index %d", t->localsid_index); +} + +static u8 * +format_srv6_ad_rewrite_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 *); + srv6_ad_rewrite_trace_t *t = va_arg (*args, srv6_ad_rewrite_trace_t *); + + return format (s, "SRv6-AD-rewrite: src %U dst %U", + format_ip6_address, &t->src, format_ip6_address, &t->dst); +} + + +/***************************** Nodes registration *****************************/ + +vlib_node_registration_t srv6_ad4_rewrite_node; +vlib_node_registration_t srv6_ad6_rewrite_node; + + +/****************************** Packet counters *******************************/ + +#define foreach_srv6_ad_rewrite_counter \ +_(PROCESSED, "srv6-ad rewritten packets") \ +_(NO_RW, "(Error) No header for rewriting.") + +typedef enum +{ +#define _(sym,str) SRV6_AD_REWRITE_COUNTER_##sym, + foreach_srv6_ad_rewrite_counter +#undef _ + SRV6_AD_REWRITE_N_COUNTERS, +} srv6_ad_rewrite_counters; + +static char *srv6_ad_rewrite_counter_strings[] = { +#define _(sym,string) string, + foreach_srv6_ad_rewrite_counter +#undef _ +}; + + +/********************************* Next nodes *********************************/ + +typedef enum +{ + SRV6_AD_LOCALSID_NEXT_ERROR, + SRV6_AD_LOCALSID_NEXT_REWRITE4, + SRV6_AD_LOCALSID_NEXT_REWRITE6, + SRV6_AD_LOCALSID_N_NEXT, +} srv6_ad_localsid_next_t; + +typedef enum +{ + SRV6_AD_REWRITE_NEXT_ERROR, + SRV6_AD_REWRITE_NEXT_LOOKUP, + SRV6_AD_REWRITE_N_NEXT, +} srv6_ad_rewrite_next_t; + + +/******************************* Local SID node *******************************/ + +/** + * @brief Function doing SRH processing for AD behavior + */ +static_always_inline void +end_ad_processing (vlib_buffer_t * b0, + ip6_header_t * ip0, + ip6_sr_header_t * sr0, + ip6_sr_localsid_t * ls0, u32 * next0) +{ + ip6_address_t *new_dst0; + u16 total_size; + ip6_ext_header_t *next_ext_header; + u8 next_hdr; + srv6_ad_localsid_t *ls0_mem; + + if (PREDICT_FALSE (ip0->protocol != IP_PROTOCOL_IPV6_ROUTE || + sr0->type != ROUTING_HEADER_TYPE_SR)) + { + return; + } + + if (PREDICT_FALSE (sr0->segments_left == 0)) + { + return; + } + + /* Decrement Segments Left and update Destination Address */ + sr0->segments_left -= 1; + new_dst0 = (ip6_address_t *) (sr0->segments) + sr0->segments_left; + ip0->dst_address.as_u64[0] = new_dst0->as_u64[0]; + ip0->dst_address.as_u64[1] = new_dst0->as_u64[1]; + + /* Compute the total size of the IPv6 header and extensions */ + total_size = sizeof (ip6_header_t); + next_ext_header = (ip6_ext_header_t *) (ip0 + 1); + next_hdr = ip0->protocol; + + while (ip6_ext_hdr (next_hdr)) + { + total_size += ip6_ext_header_len (next_ext_header); + next_hdr = next_ext_header->next_hdr; + next_ext_header = ip6_ext_next_header (next_ext_header); + } + + /* Make sure next header is IP */ + if (PREDICT_FALSE + (next_hdr != IP_PROTOCOL_IPV6 && next_hdr != IP_PROTOCOL_IP_IN_IP)) + { + return; + } + + /* Retrieve SID memory */ + ls0_mem = ls0->plugin_mem; + + /* Cache IP header and extensions */ + vec_validate (ls0_mem->rewrite, total_size - 1); + clib_memcpy (ls0_mem->rewrite, ip0, total_size); + + /* Remove IP header and extensions */ + vlib_buffer_advance (b0, total_size); + + /* Set Xconnect adjacency to VNF */ + vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0_mem->nh_adj; + + if (ls0_mem->ip_version == DA_IP4) + *next0 = SRV6_AD_LOCALSID_NEXT_REWRITE4; + else if (ls0_mem->ip_version == DA_IP6) + *next0 = SRV6_AD_LOCALSID_NEXT_REWRITE6; +} + +/** + * @brief SRv6 AD Localsid graph node + */ +static uword +srv6_ad_localsid_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + ip6_sr_main_t *sm = &sr_main; + u32 n_left_from, next_index, *from, *to_next; + u32 cnt_packets = 0; + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + next_index = node->cached_next_index; + + u32 thread_index = vlib_get_thread_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); + + /* TODO: Dual/quad loop */ + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t *b0; + ip6_header_t *ip0 = 0; + ip6_sr_header_t *sr0; + ip6_sr_localsid_t *ls0; + u32 next0 = SRV6_AD_LOCALSID_NEXT_ERROR; + + 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); + ip0 = vlib_buffer_get_current (b0); + sr0 = (ip6_sr_header_t *) (ip0 + 1); + + /* Lookup the SR End behavior based on IP DA (adj) */ + ls0 = pool_elt_at_index (sm->localsids, + vnet_buffer (b0)->ip.adj_index[VLIB_TX]); + + /* SRH processing */ + end_ad_processing (b0, ip0, sr0, ls0, &next0); + + if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) + { + srv6_ad_localsid_trace_t *tr = + vlib_add_trace (vm, node, b0, sizeof *tr); + tr->localsid_index = ls0 - sm->localsids; + } + + /* This increments the SRv6 per LocalSID counters. */ + vlib_increment_combined_counter (((next0 == + SRV6_AD_LOCALSID_NEXT_ERROR) ? + &(sm->sr_ls_invalid_counters) : + &(sm->sr_ls_valid_counters)), + thread_index, ls0 - sm->localsids, + 1, vlib_buffer_length_in_chain (vm, + b0)); + + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, + n_left_to_next, bi0, next0); + + cnt_packets++; + } + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + + return frame->n_vectors; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (srv6_ad_localsid_node) = { + .function = srv6_ad_localsid_fn, + .name = "srv6-ad-localsid", + .vector_size = sizeof (u32), + .format_trace = format_srv6_ad_localsid_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .n_next_nodes = SRV6_AD_LOCALSID_N_NEXT, + .next_nodes = { + [SRV6_AD_LOCALSID_NEXT_REWRITE4] = "ip4-rewrite", + [SRV6_AD_LOCALSID_NEXT_REWRITE6] = "ip6-rewrite", + [SRV6_AD_LOCALSID_NEXT_ERROR] = "error-drop", + }, +}; +/* *INDENT-ON* */ + + +/******************************* Rewriting node *******************************/ + +/** + * @brief Graph node for applying a SR policy into an IPv6 packet. Encapsulation + */ +static uword +srv6_ad4_rewrite_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + ip6_sr_main_t *srm = &sr_main; + srv6_ad_main_t *sm = &srv6_ad_main; + u32 n_left_from, next_index, *from, *to_next; + u32 cnt_packets = 0; + + 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); + + /* TODO: Dual/quad loop */ + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t *b0; + ip4_header_t *ip0_encap = 0; + ip6_header_t *ip0 = 0; + ip6_sr_localsid_t *ls0; + srv6_ad_localsid_t *ls0_mem; + u32 next0 = SRV6_AD_REWRITE_NEXT_LOOKUP; + u16 new_l0 = 0; + + 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); + ip0_encap = vlib_buffer_get_current (b0); + ls0 = pool_elt_at_index (srm->localsids, + sm->sw_iface_localsid4[vnet_buffer + (b0)->sw_if_index + [VLIB_RX]]); + ls0_mem = ls0->plugin_mem; + + if (PREDICT_FALSE (ls0_mem == NULL || ls0_mem->rewrite == NULL)) + { + next0 = SRV6_AD_REWRITE_NEXT_ERROR; + b0->error = node->errors[SRV6_AD_REWRITE_COUNTER_NO_RW]; + } + else + { + ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >= + (vec_len (ls0_mem->rewrite) + b0->current_data)); + + clib_memcpy (((u8 *) ip0_encap) - vec_len (ls0_mem->rewrite), + ls0_mem->rewrite, vec_len (ls0_mem->rewrite)); + vlib_buffer_advance (b0, -(word) vec_len (ls0_mem->rewrite)); + + ip0 = vlib_buffer_get_current (b0); + + /* Update inner IPv4 TTL and checksum */ + u32 checksum0; + ip0_encap->ttl -= 1; + checksum0 = ip0_encap->checksum + clib_host_to_net_u16 (0x0100); + checksum0 += checksum0 >= 0xffff; + ip0_encap->checksum = checksum0; + + /* Update outer IPv6 length (in case it has changed) */ + new_l0 = vec_len (ls0_mem->rewrite) - sizeof (ip6_header_t) + + clib_net_to_host_u16 (ip0_encap->length); + ip0->payload_length = clib_host_to_net_u16 (new_l0); + } + + if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) && + PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) + { + srv6_ad_rewrite_trace_t *tr = + vlib_add_trace (vm, node, b0, sizeof *tr); + clib_memcpy (tr->src.as_u8, ip0->src_address.as_u8, + sizeof tr->src.as_u8); + clib_memcpy (tr->dst.as_u8, ip0->dst_address.as_u8, + sizeof tr->dst.as_u8); + } + + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, + n_left_to_next, bi0, next0); + + cnt_packets++; + } + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + + /* Update counters */ + vlib_node_increment_counter (vm, srv6_ad4_rewrite_node.index, + SRV6_AD_REWRITE_COUNTER_PROCESSED, + cnt_packets); + + return frame->n_vectors; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (srv6_ad4_rewrite_node) = { + .function = srv6_ad4_rewrite_fn, + .name = "srv6-ad4-rewrite", + .vector_size = sizeof (u32), + .format_trace = format_srv6_ad_rewrite_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = SRV6_AD_REWRITE_N_COUNTERS, + .error_strings = srv6_ad_rewrite_counter_strings, + .n_next_nodes = SRV6_AD_REWRITE_N_NEXT, + .next_nodes = { + [SRV6_AD_REWRITE_NEXT_LOOKUP] = "ip6-lookup", + [SRV6_AD_REWRITE_NEXT_ERROR] = "error-drop", + }, +}; +/* *INDENT-ON* */ + + +/** + * @brief Graph node for applying a SR policy into an IPv6 packet. Encapsulation + */ +static uword +srv6_ad6_rewrite_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + ip6_sr_main_t *srm = &sr_main; + srv6_ad_main_t *sm = &srv6_ad_main; + u32 n_left_from, next_index, *from, *to_next; + u32 cnt_packets = 0; + + 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); + + /* TODO: Dual/quad loop */ + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t *b0; + ip6_header_t *ip0 = 0, *ip0_encap = 0; + ip6_sr_localsid_t *ls0; + srv6_ad_localsid_t *ls0_mem; + u32 next0 = SRV6_AD_REWRITE_NEXT_LOOKUP; + u16 new_l0 = 0; + + 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); + ip0_encap = vlib_buffer_get_current (b0); + ls0 = pool_elt_at_index (srm->localsids, + sm->sw_iface_localsid6[vnet_buffer + (b0)->sw_if_index + [VLIB_RX]]); + ls0_mem = ls0->plugin_mem; + + if (PREDICT_FALSE (ls0_mem == NULL || ls0_mem->rewrite == NULL)) + { + next0 = SRV6_AD_REWRITE_NEXT_ERROR; + b0->error = node->errors[SRV6_AD_REWRITE_COUNTER_NO_RW]; + } + else + { + ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >= + (vec_len (ls0_mem->rewrite) + b0->current_data)); + + clib_memcpy (((u8 *) ip0_encap) - vec_len (ls0_mem->rewrite), + ls0_mem->rewrite, vec_len (ls0_mem->rewrite)); + vlib_buffer_advance (b0, -(word) vec_len (ls0_mem->rewrite)); + + ip0 = vlib_buffer_get_current (b0); + + /* Update inner IPv6 hop limit */ + ip0_encap->hop_limit -= 1; + + /* Update outer IPv6 length (in case it has changed) */ + new_l0 = vec_len (ls0_mem->rewrite) + + clib_net_to_host_u16 (ip0_encap->payload_length); + ip0->payload_length = clib_host_to_net_u16 (new_l0); + } + + if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) && + PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) + { + srv6_ad_rewrite_trace_t *tr = + vlib_add_trace (vm, node, b0, sizeof *tr); + clib_memcpy (tr->src.as_u8, ip0->src_address.as_u8, + sizeof tr->src.as_u8); + clib_memcpy (tr->dst.as_u8, ip0->dst_address.as_u8, + sizeof tr->dst.as_u8); + } + + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, + n_left_to_next, bi0, next0); + + cnt_packets++; + } + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + + /* Update counters */ + vlib_node_increment_counter (vm, srv6_ad6_rewrite_node.index, + SRV6_AD_REWRITE_COUNTER_PROCESSED, + cnt_packets); + + return frame->n_vectors; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (srv6_ad6_rewrite_node) = { + .function = srv6_ad6_rewrite_fn, + .name = "srv6-ad6-rewrite", + .vector_size = sizeof (u32), + .format_trace = format_srv6_ad_rewrite_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = SRV6_AD_REWRITE_N_COUNTERS, + .error_strings = srv6_ad_rewrite_counter_strings, + .n_next_nodes = SRV6_AD_REWRITE_N_NEXT, + .next_nodes = { + [SRV6_AD_REWRITE_NEXT_LOOKUP] = "ip6-lookup", + [SRV6_AD_REWRITE_NEXT_ERROR] = "error-drop", + }, +}; +/* *INDENT-ON* */ + +/* +* fd.io coding-style-patch-verification: ON +* +* Local Variables: +* eval: (c-set-style "gnu") +* End: +*/ diff --git a/src/plugins/srv6_ad.am b/src/plugins/srv6_ad.am new file mode 100644 index 00000000000..ea1297b7aaa --- /dev/null +++ b/src/plugins/srv6_ad.am @@ -0,0 +1,22 @@ +# Copyright (c) 2016 Cisco Systems, Inc. +# 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. + +vppplugins_LTLIBRARIES += srv6ad_plugin.la + +srv6ad_plugin_la_SOURCES = \ + srv6-ad/ad.c \ + srv6-ad/node.c + +noinst_HEADERS += srv6-ad/ad.h + +# vi:syntax=automake |