DOC ONLY: describe dispatch pcap tracing - vpp

diff options

author	Dave Barach <dave@barachs.net>	2018-12-04 10:29:18 -0500
committer	Dave Barach <openvpp@barachs.net>	2018-12-05 15:26:45 +0000
commit	01fdbcca130a6575712de99e26f46e21da432d40 (patch)
tree	0accf9a63f71752f345efb32728bb83d09280835 /docs/gettingstarted/developers/gdb_examples.rst
parent	318d7940433cf2c864820ce73932be5fbce4c749 (diff)

DOC ONLY: describe dispatch pcap tracing

and wireshark dissection of these traces. Change-Id: I61029fd20d6d5f6c40638e3ea9223f2354abedba Signed-off-by: Dave Barach <dave@barachs.net>

Diffstat (limited to 'docs/gettingstarted/developers/gdb_examples.rst')

0 files changed, 0 insertions, 0 deletions

/* *------------------------------------------------------------------ * Copyright (c) 2017 Intel 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 _PPPOE_H #define _PPPOE_H #include <vnet/plugin/plugin.h> #include <vppinfra/lock.h> #include <vppinfra/error.h> #include <vppinfra/hash.h> #include <vnet/vnet.h> #include <vnet/ip/ip.h> #include <vnet/ethernet/ethernet.h> #include <vnet/ip/ip4_packet.h> #include <vnet/ip/ip6_packet.h> #include <vnet/dpo/dpo.h> #include <vnet/adj/adj_types.h> #include <vnet/fib/fib_table.h> #include <vlib/vlib.h> #include <vppinfra/bihash_8_8.h> typedef struct { u8 ver_type; u8 code; u16 session_id; u16 length; u16 ppp_proto; } pppoe_header_t; #define PPPOE_VER_TYPE 0x11 #define PPPOE_PADS 0x65 typedef struct { /* Required for pool_get_aligned */ CLIB_CACHE_LINE_ALIGN_MARK (cacheline0); /* pppoe session_id in HOST byte order */ u16 session_id; /* session client addresses */ ip46_address_t client_ip; /* the index of tx interface for pppoe encaped packet */ u32 encap_if_index; /** FIB indices - inner IP packet lookup here */ u32 decap_fib_index; u8 local_mac[6]; u8 client_mac[6]; /* vnet intfc index */ u32 sw_if_index; u32 hw_if_index; } pppoe_session_t; #define foreach_pppoe_input_next \ _(DROP, "error-drop") \ _(IP4_INPUT, "ip4-input") \ _(IP6_INPUT, "ip6-input" ) \ _(CP_INPUT, "pppoe-cp-dispatch" ) \ typedef enum { #define _(s,n) PPPOE_INPUT_NEXT_##s, foreach_pppoe_input_next #undef _ PPPOE_INPUT_N_NEXT, } pppoe_input_next_t; typedef enum { #define pppoe_error(n,s) PPPOE_ERROR_##n, #include <pppoe/pppoe_error.def> #undef pppoe_error PPPOE_N_ERROR, } pppoe_input_error_t; #define MTU 1500 #define MTU_BUFFERS ((MTU + vlib_buffer_get_default_data_size(vm) - 1) / vlib_buffer_get_default_data_size(vm)) #define NUM_BUFFERS_TO_ALLOC 32 /* * The size of pppoe session table */ #define PPPOE_NUM_BUCKETS (64 * 1024) #define PPPOE_MEMORY_SIZE (8<<20) /* *INDENT-OFF* */ /* * The PPPoE key is the mac address and session ID */ typedef struct { union { struct { u16 session_id; u8 mac[6]; } fields; struct { u32 w0; u32 w1; } words; u64 raw; }; } pppoe_entry_key_t; /* *INDENT-ON* */ /* *INDENT-OFF* */ /* * The PPPoE entry results */ typedef struct { union { struct { u32 sw_if_index; u32 session_index; } fields; u64 raw; }; } pppoe_entry_result_t; /* *INDENT-ON* */ typedef struct { /* Vector of encap session instances, */ pppoe_session_t *sessions; /* For CP: vector of CP path */ BVT (clib_bihash) link_table; /* For DP: vector of DP path */ BVT (clib_bihash) session_table; /* Free vlib hw_if_indices */ u32 *free_pppoe_session_hw_if_indices; /* Mapping from sw_if_index to session index */ u32 *session_index_by_sw_if_index; /* used for pppoe cp path */ u32 cp_if_index; /* API message ID base */ u16 msg_id_base; /* convenience */ vlib_main_t *vlib_main; vnet_main_t *vnet_main; } pppoe_main_t; extern pppoe_main_t pppoe_main; extern vlib_node_registration_t pppoe_input_node; extern vlib_node_registration_t pppoe_cp_dispatch_node; typedef struct { u8 is_add; u8 is_ip6; u16 session_id; ip46_address_t client_ip; u32 encap_if_index; u32 decap_fib_index; u8 local_mac[6]; u8 client_mac[6]; } vnet_pppoe_add_del_session_args_t; int vnet_pppoe_add_del_session (vnet_pppoe_add_del_session_args_t * a, u32 * sw_if_indexp); typedef struct { u8 is_add; u32 client_if_index; u32 cp_if_index; } vnet_pppoe_add_del_tap_args_t; always_inline u64 pppoe_make_key (u8 * mac_address, u16 session_id) { u64 temp; /* * The mac address in memory is A:B:C:D:E:F * The session_id in register is H:L */ #if CLIB_ARCH_IS_LITTLE_ENDIAN /* * Create the in-register key as F:E:D:C:B:A:H:L * In memory the key is L:H:A:B:C:D:E:F */ temp = *((u64 *) (mac_address)) << 16; temp = (temp & ~0xffff) | (u64) (session_id); #else /* * Create the in-register key as H:L:A:B:C:D:E:F * In memory the key is H:L:A:B:C:D:E:F */ temp = *((u64 *) (mac_address)) >> 16; temp = temp | (((u64) session_id) << 48); #endif return temp; } /** * Perform learning on one packet based on the mac table lookup result. * */ static_always_inline void pppoe_learn_process (BVT (clib_bihash) * table, u32 sw_if_index0, pppoe_entry_key_t * key0, pppoe_entry_key_t * cached_key, u32 * bucket0, pppoe_entry_result_t * result0) { /* Check mac table lookup result */ if (PREDICT_TRUE (result0->fields.sw_if_index == sw_if_index0)) { /* * The entry was in the table, and the sw_if_index matched, the normal case */ return; } else if (result0->fields.sw_if_index == ~0) { /* The entry was not in table, so add it */ result0->fields.sw_if_index = sw_if_index0; result0->fields.session_index = ~0; cached_key->raw = ~0; /* invalidate the cache */ } else { /* The entry was in the table, but with the wrong sw_if_index mapping (mac move) */ result0->fields.sw_if_index = sw_if_index0; } /* Update the entry */ BVT (clib_bihash_kv) kv; kv.key = key0->raw; kv.value = result0->raw; BV (clib_bihash_add_del) (table, &kv, 1 /* is_add */ ); } static_always_inline void pppoe_lookup_1 (BVT (clib_bihash) * table, pppoe_entry_key_t * cached_key, pppoe_entry_result_t * cached_result, u8 * mac0, u16 session_id0, pppoe_entry_key_t * key0, u32 * bucket0, pppoe_entry_result_t * result0) { /* set up key */ key0->raw = pppoe_make_key (mac0, session_id0); *bucket0 = ~0; if (key0->raw == cached_key->raw) { /* Hit in the one-entry cache */ result0->raw = cached_result->raw; } else { /* Do a regular session table lookup */ BVT (clib_bihash_kv) kv; kv.key = key0->raw; kv.value = ~0ULL; BV (clib_bihash_search_inline) (table, &kv); result0->raw = kv.value; /* Update one-entry cache */ cached_key->raw = key0->raw; cached_result->raw = result0->raw; } } static_always_inline void pppoe_update_1 (BVT (clib_bihash) * table, u8 * mac0, u16 session_id0, pppoe_entry_key_t * key0, u32 * bucket0, pppoe_entry_result_t * result0) { /* set up key */ key0->raw = pppoe_make_key (mac0, session_id0); *bucket0 = ~0; /* Update the entry */ BVT (clib_bihash_kv) kv; kv.key = key0->raw; kv.value = result0->raw; BV (clib_bihash_add_del) (table, &kv, 1 /* is_add */ ); } #endif /* _PPPOE_H */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


context:
space:
mode: