diff options
Diffstat (limited to 'vpp/app/l2t_ip6.c')
| -rw-r--r-- | vpp/app/l2t_ip6.c | 343 |
1 files changed, 0 insertions, 343 deletions
diff --git a/vpp/app/l2t_ip6.c b/vpp/app/l2t_ip6.c deleted file mode 100644 index ff680734..00000000 --- a/vpp/app/l2t_ip6.c +++ /dev/null @@ -1,343 +0,0 @@ -/* - * 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 <vnet/vnet.h> -#include <vnet/ip/ip.h> -#include <vnet/ethernet/ethernet.h> - -#if DPDK == 0 -#include <vnet/devices/pci/ixgev.h> -#include <vnet/devices/pci/ixge.h> -#include <vnet/devices/pci/ige.h> -#include <vnet/devices/pci/vice.h> -#else -#include <vnet/devices/dpdk/dpdk.h> -#endif - -#include <vppinfra/error.h> -#include <vppinfra/hash.h> -#include <app/l2t.h> - -l2t_main_t l2t_main; - -/* Statistics (not really errors) */ -#define foreach_l2t_ip6_error \ -_(USER_TO_NETWORK, "User (v6) to L2 network pkts") \ -_(SESSION_ID_MISMATCH, "l2tpv3 local session id mismatches") \ -_(COOKIE_MISMATCH, "l2tpv3 local cookie mismatches") - -static char *l2t_ip6_error_strings[] = { -#define _(sym,string) string, - foreach_l2t_ip6_error -#undef _ -}; - -typedef enum -{ -#define _(sym,str) L2T_IP6_ERROR_##sym, - foreach_l2t_ip6_error -#undef _ - L2T_IP6_N_ERROR, -} l2t_ip6_error_t; - -/* - * Packets go to ip6-input when they don't match a mapping, - * example: v6 neighbor discovery. They go to ip4-input - * when they do match, and are decapsulated. - */ -typedef enum -{ - L2T_IP6_NEXT_DROP, - L2T_IP6_NEXT_IP6_INPUT, - L2T_IP6_N_NEXT, - /* Pseudo next, fixed in last_stage */ - L2T_IP6_NEXT_OUTPUT = L2T_IP6_N_NEXT, -} l2t_ip6_next_t; - -vlib_node_registration_t l2t_ip6_node; - -#define NSTAGES 3 - -static inline void -stage0 (vlib_main_t * vm, vlib_node_runtime_t * node, u32 buffer_index) -{ - vlib_buffer_t *b = vlib_get_buffer (vm, buffer_index); - vlib_prefetch_buffer_header (b, STORE); - /* l2tpv3 header is a long way away, need 2 cache lines */ - CLIB_PREFETCH (b->data, 2 * CLIB_CACHE_LINE_BYTES, STORE); -} - -static inline void -stage1 (vlib_main_t * vm, vlib_node_runtime_t * node, u32 bi) -{ - vlib_buffer_t *b = vlib_get_buffer (vm, bi); - l2t_main_t *lm = &l2t_main; - ip6_header_t *ip6 = vlib_buffer_get_current (b); - u32 session_index; - uword *p; - l2tpv3_header_t *l2t; - - /* Not L2tpv3 (0x73, 0t115)? Use the normal path. */ - if (PREDICT_FALSE (ip6->protocol != 0x73)) - { - vnet_buffer (b)->l2t.next_index = L2T_IP6_NEXT_IP6_INPUT; - return; - } - - /* Make up your minds, people... */ - switch (lm->lookup_type) - { - case L2T_LOOKUP_SRC_ADDRESS: - p = hash_get_mem (lm->session_by_src_address, &ip6->src_address); - break; - case L2T_LOOKUP_DST_ADDRESS: - p = hash_get_mem (lm->session_by_dst_address, &ip6->dst_address); - break; - case L2T_LOOKUP_SESSION_ID: - l2t = (l2tpv3_header_t *) (ip6 + 1); - p = hash_get (lm->session_by_session_id, l2t->session_id); - break; - default: - ASSERT (0); - } - - if (PREDICT_FALSE (p == 0)) - { - vnet_buffer (b)->l2t.next_index = L2T_IP6_NEXT_IP6_INPUT; - return; - } - else - { - session_index = p[0]; - } - - /* Remember mapping index, prefetch the mini counter */ - vnet_buffer (b)->l2t.next_index = L2T_IP6_NEXT_OUTPUT; - vnet_buffer (b)->l2t.session_index = session_index; - - /* Each mapping has 2 x (pkt, byte) counters, hence the shift */ - CLIB_PREFETCH (lm->counter_main.mini + (p[0] << 1), CLIB_CACHE_LINE_BYTES, - STORE); -} - -static inline u32 -last_stage (vlib_main_t * vm, vlib_node_runtime_t * node, u32 bi) -{ - vlib_buffer_t *b = vlib_get_buffer (vm, bi); - l2t_main_t *lm = &l2t_main; - ip6_header_t *ip6 = vlib_buffer_get_current (b); - vlib_node_t *n = vlib_get_node (vm, l2t_ip6_node.index); - u32 node_counter_base_index = n->error_heap_index; - vlib_error_main_t *em = &vm->error_main; - ethernet_header_t *l2_payload; - l2tpv3_header_t *l2t; /* original l2 header */ - ethernet_vlan_header_t *vh; /* synthesized 802.1q vlan header */ - u32 counter_index; - l2t_session_t *session; - u16 payload_ethertype; - u8 dst_mac_address[6]; - u8 src_mac_address[6]; - u8 *vlan_header_pos; - - /* Other-than-output pkt? We're done... */ - if (vnet_buffer (b)->l2t.next_index != L2T_IP6_NEXT_OUTPUT) - return vnet_buffer (b)->l2t.next_index; - - em->counters[node_counter_base_index + L2T_IP6_ERROR_USER_TO_NETWORK] += 1; - - counter_index = - session_index_to_counter_index (vnet_buffer (b)->l2t.session_index, - SESSION_COUNTER_USER_TO_NETWORK); - - /* per-mapping byte stats include the ethernet header */ - vlib_increment_combined_counter (&lm->counter_main, counter_index, - 1 /* packet_increment */ , - vlib_buffer_length_in_chain (vm, b) + - sizeof (ethernet_header_t)); - - session = pool_elt_at_index (lm->sessions, - vnet_buffer (b)->l2t.session_index); - - /* build the 802.1q encaps. Advance past ip6 and l2tpv3 hds */ - vlib_buffer_advance (b, sizeof (*ip6)); - l2t = vlib_buffer_get_current (b); - - /* $$$ wonder if we really need these checks... */ - if (PREDICT_FALSE (l2t->session_id != session->local_session_id)) - { - b->error = - lm->ip6_error_node->errors[L2T_IP6_ERROR_SESSION_ID_MISMATCH]; - return L2T_IP6_NEXT_DROP; - } - - if (PREDICT_FALSE (!((l2t->cookie == session->local_cookie) || - ((session->cookie_flags & L2TP_COOKIE_ROLLOVER_LOCAL) - && (l2t->cookie == session->lcl_ro_cookie))))) - { - b->error = lm->ip6_error_node->errors[L2T_IP6_ERROR_COOKIE_MISMATCH]; - return L2T_IP6_NEXT_DROP; - } - - vnet_buffer (b)->sw_if_index[VLIB_TX] = session->l2_output_sw_if_index; - - vlib_buffer_advance (b, sizeof (*l2t)); - - /* point at currrent l2 hdr */ - l2_payload = vlib_buffer_get_current (b); - - /* $$$$ rework for speed */ - - /* Save type */ - payload_ethertype = l2_payload->type; - - /* Save src/dst MAC addresses */ -#define _(i) dst_mac_address[i] = l2_payload->dst_address[i]; - _(0) _(1) _(2) _(3) _(4) _(5); -#undef _ -#define _(i) src_mac_address[i] = l2_payload->src_address[i]; - _(0) _(1) _(2) _(3) _(4) _(5); -#undef _ - - /* Punch in space for 802.1q tag */ - vlib_buffer_advance (b, -4); - l2_payload = vlib_buffer_get_current (b); - - /* Restore MAC addresses */ -#define _(i) l2_payload->dst_address[i] = dst_mac_address[i]; - _(0) _(1) _(2) _(3) _(4) _(5); -#undef _ -#define _(i) l2_payload->src_address[i] = src_mac_address[i]; - _(0) _(1) _(2) _(3) _(4) _(5); -#undef _ - /* Set (outer) ethertype to 802.1q vlan */ - l2_payload->type = clib_host_to_net_u16 (0x8100); - vlan_header_pos = (u8 *) (l2_payload + 1); -#if 0 - vlan_header_pos = session->l2_sublayer_present ? - vlan_header_pos : vlan_header_pos - 4; -#endif - vh = (ethernet_vlan_header_t *) vlan_header_pos; - vh->priority_cfi_and_id = session->vlan_id; - vh->type = payload_ethertype; - - if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED)) - { - l2t_trace_t *t = vlib_add_trace (vm, node, b, sizeof (*t)); - t->is_user_to_network = 1; - t->our_address.as_u64[0] = ip6->dst_address.as_u64[0]; - t->our_address.as_u64[1] = ip6->dst_address.as_u64[1]; - t->client_address.as_u64[0] = ip6->src_address.as_u64[0]; - t->client_address.as_u64[1] = ip6->src_address.as_u64[1]; - t->session_index = vnet_buffer (b)->l2t.session_index; - t->vlan_id_host_byte_order = clib_net_to_host_u16 (session->vlan_id); - } - - return session->l2_output_next_index; -} - -#include <vnet/pipeline.h> - -static uword -ip6_l2t_node_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - l2t_main_t *lm = &l2t_main; - lm->ip6_error_node = vlib_node_get_runtime (vm, l2t_ip6_node.index); - - return dispatch_pipeline (vm, node, frame); -} - -/* *INDENT-OFF* */ -static VLIB_REGISTER_NODE (sw6_ip6_node) = { - .function = ip6_l2t_node_fn, - .name = "ip6-l2t-input", - .vector_size = sizeof (u32), - .format_trace = format_l2t_trace, - .type = VLIB_NODE_TYPE_INTERNAL, - - .n_errors = ARRAY_LEN(l2t_ip6_error_strings), - .error_strings = l2t_ip6_error_strings, - - .n_next_nodes = L2T_IP6_N_NEXT, - - /* edit / add dispositions here */ - .next_nodes = { - [L2T_IP6_NEXT_IP6_INPUT] = "ip6-input", - [L2T_IP6_NEXT_DROP] = "error-drop", - }, -}; -/* *INDENT-ON* */ - -VLIB_NODE_FUNCTION_MULTIARCH (sw6_ip6_node, ip6_l2t_node_fn); -static clib_error_t * -l2tp_config (vlib_main_t * vm, unformat_input_t * input) -{ - l2t_main_t *lm = &l2t_main; - - while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) - { - if (unformat (input, "lookup-v6-src")) - lm->lookup_type = L2T_LOOKUP_SRC_ADDRESS; - else if (unformat (input, "lookup-v6-dst")) - lm->lookup_type = L2T_LOOKUP_DST_ADDRESS; - else if (unformat (input, "lookup-session-id")) - lm->lookup_type = L2T_LOOKUP_SESSION_ID; - else - return clib_error_return (0, "unknown input `%U'", - format_unformat_error, input); - } - return 0; -} - -VLIB_CONFIG_FUNCTION (l2tp_config, "l2tp"); - -clib_error_t * -l2t_ip6_init (vlib_main_t * vm) -{ - l2t_main_t *lm = &l2t_main; - - lm->vnet_main = vnet_get_main (); - lm->vlib_main = vm; - lm->lookup_type = L2T_LOOKUP_DST_ADDRESS; - - lm->session_by_src_address = hash_create_mem - (0, sizeof (ip6_address_t) /* key bytes */ , - sizeof (u32) /* value bytes */ ); - lm->session_by_dst_address = hash_create_mem - (0, sizeof (ip6_address_t) /* key bytes */ , - sizeof (u32) /* value bytes */ ); - lm->session_by_session_id = hash_create (0, sizeof (uword)); - - lm->session_by_vlan_and_rx_sw_if_index = hash_create (0, sizeof (uword)); - -#if DPDK == 0 - vice_set_next_node (VICE_RX_NEXT_IP6_INPUT, "ip6-l2t-input"); - ixgev_set_next_node (IXGEV_RX_NEXT_IP6_INPUT, "ip6-l2t-input"); - ixge_set_next_node (IXGE_RX_NEXT_IP6_INPUT, "ip6-l2t-input"); - ige_set_next_node (IGE_RX_NEXT_IP6_INPUT, "ip6-l2t-input"); -#else - dpdk_set_next_node (DPDK_RX_NEXT_IP6_INPUT, "ip6-l2t-input"); -#endif - return 0; -} - -VLIB_INIT_FUNCTION (l2t_ip6_init); - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |