diff options
Diffstat (limited to 'extras')
| -rw-r--r-- | extras/wireshark/diffs.txt | 12 | ||||
| -rw-r--r-- | extras/wireshark/packet-vpp.c | 986 | ||||
| -rw-r--r-- | extras/wireshark/readme.md | 81 |
3 files changed, 1079 insertions, 0 deletions
diff --git a/extras/wireshark/diffs.txt b/extras/wireshark/diffs.txt new file mode 100644 index 00000000000..66688d3311e --- /dev/null +++ b/extras/wireshark/diffs.txt @@ -0,0 +1,12 @@ +diff --git a/epan/dissectors/CMakeLists.txt b/epan/dissectors/CMakeLists.txt +index 6fe8356f4e..6294ab5504 100644 +--- a/epan/dissectors/CMakeLists.txt ++++ b/epan/dissectors/CMakeLists.txt +@@ -1812,6 +1812,7 @@ set(DISSECTOR_SRC + ${CMAKE_CURRENT_SOURCE_DIR}/packet-vnc.c + ${CMAKE_CURRENT_SOURCE_DIR}/packet-vntag.c + ${CMAKE_CURRENT_SOURCE_DIR}/packet-vp8.c ++ ${CMAKE_CURRENT_SOURCE_DIR}/packet-vpp.c + ${CMAKE_CURRENT_SOURCE_DIR}/packet-vrrp.c + ${CMAKE_CURRENT_SOURCE_DIR}/packet-vrt.c + ${CMAKE_CURRENT_SOURCE_DIR}/packet-vsip.c diff --git a/extras/wireshark/packet-vpp.c b/extras/wireshark/packet-vpp.c new file mode 100644 index 00000000000..fbc815432eb --- /dev/null +++ b/extras/wireshark/packet-vpp.c @@ -0,0 +1,986 @@ +/* packet-vpp.c + * + * Routines for the disassembly of fd.io vpp project + * dispatch captures + * + * Copyright (c) 2018 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. + * + * This version is not to be upstreamed as-is, since it hooks up the + * vpp dissector to WTAP_ENCAP_USER13, a test encap type. + */ + +#include "config.h" + +#include <epan/packet.h> +#include <epan/expert.h> +#include <epan/to_str.h> +#include <epan/in_cksum.h> +#include <epan/nlpid.h> +#include <epan/etypes.h> +#include <stdio.h> +#include <wsutil/ws_printf.h> + +void proto_register_vpp(void); +void proto_reg_handoff_vpp(void); + +static int proto_vpp = -1; +static int proto_vpp_opaque = -1; +static int proto_vpp_trace = -1; +static int hf_vpp_nodename = -1; +static int hf_vpp_buffer_index = -1; + +static int hf_vpp_buffer_current_data = -1; +static int hf_vpp_buffer_current_length = -1; + +static int hf_vpp_buffer_flags = -1; +static int hf_vpp_buffer_flag_non_default_freelist = -1; +static int hf_vpp_buffer_flag_traced = -1; +static int hf_vpp_buffer_flag_next_present = -1; +static int hf_vpp_buffer_flag_total_length_valid = -1; +static int hf_vpp_buffer_flag_ext_hdr_valid = -1; +static int hf_vpp_buffer_flag_l4_checksum_computed = -1; +static int hf_vpp_buffer_flag_l4_checksum_correct = -1; +static int hf_vpp_buffer_flag_vlan_2_deep = -1; +static int hf_vpp_buffer_flag_vlan_1_deep = -1; +static int hf_vpp_buffer_flag_span_clone = -1; +static int hf_vpp_buffer_flag_loop_counter_valid = -1; +static int hf_vpp_buffer_flag_locally_originated = -1; +static int hf_vpp_buffer_flag_is_ip4 = -1; +static int hf_vpp_buffer_flag_is_ip6 = -1; +static int hf_vpp_buffer_flag_offload_ip_checksum = -1; +static int hf_vpp_buffer_flag_offload_tcp_checksum = -1; +static int hf_vpp_buffer_flag_offload_udp_checksum = -1; +static int hf_vpp_buffer_flag_is_natted = -1; +static int hf_vpp_buffer_flag_l2_hdr_offset_valid = -1; +static int hf_vpp_buffer_flag_l3_hdr_offset_valid = -1; +static int hf_vpp_buffer_flag_l4_hdr_offset_valid = -1; +static int hf_vpp_buffer_flag_flow_report = -1; +static int hf_vpp_buffer_flag_is_dvr = -1; +static int hf_vpp_buffer_flag_qos_data_valid = -1; +static int hf_vpp_buffer_flow_id = -1; +static int hf_vpp_buffer_next_buffer = -1; +static int hf_vpp_buffer_current_config_index = -1; +static int hf_vpp_buffer_error_index = -1; +static int hf_vpp_buffer_n_add_refs = -1; +static int hf_vpp_buffer_buffer_pool_index = -1; + +static int hf_vpp_buffer_opaque_raw = -1; +static int hf_vpp_buffer_opaque_opaque = -1; + +static int hf_vpp_buffer_trace = -1; + +static gint ett_vpp = -1; +static gint ett_vpp_opaque = -1; +static gint ett_vpp_trace = -1; + +static dissector_handle_t vpp_dissector_handle; +static dissector_handle_t vpp_opaque_dissector_handle; +static dissector_handle_t vpp_trace_dissector_handle; + +static dissector_handle_t eth_dissector_handle; +static dissector_handle_t ip4_dissector_handle; +static dissector_handle_t ip6_dissector_handle; +static dissector_handle_t udp_dissector_handle; + +#define foreach_node_to_dissector_handle \ +_("ip6-lookup", "ipv6", ip6_dissector_handle) \ +_("ip4-input-no-checksum", "ip", ip4_dissector_handle) \ +_("ip4-lookup", "ip", ip4_dissector_handle) \ +_("ip4-local", "ip", ip4_dissector_handle) \ +_("ip4-udp-lookup", "ip", udp_dissector_handle) \ +_("ip4-icmp-error", "ip", ip4_dissector_handle) \ +_("ip4-glean", "ip", ip4_dissector_handle) \ +_("ethernet-input", "eth_maybefcs", eth_dissector_handle) + +static void +add_multi_line_string_to_tree(proto_tree *tree, tvbuff_t *tvb, gint start, + gint len, int hf) +{ + gint next; + int line_len; + int data_len; + + while (len > 0) { + line_len = tvb_find_line_end(tvb, start, len, &next, FALSE); + data_len = next - start; + proto_tree_add_string(tree, hf, tvb, start, data_len, + tvb_format_stringzpad(tvb, start, line_len)); + start += data_len; + len -= data_len; + } +} + +static int +dissect_vpp_trace (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, + void* data _U_) +{ + int offset = 0; + proto_item *ti; + proto_tree *trace_tree; + gint trace_string_length; + + col_set_str(pinfo->cinfo, COL_PROTOCOL, "VPP-Trace"); + col_clear(pinfo->cinfo, COL_INFO); + + ti = proto_tree_add_item(tree, proto_vpp_trace, tvb, offset, -1, ENC_NA); + trace_tree = proto_item_add_subtree(ti, ett_vpp_trace); + + /* How long is the trace string? */ + (void ) tvb_get_stringz_enc (wmem_packet_scope(), tvb, 0, + &trace_string_length, ENC_ASCII); + + add_multi_line_string_to_tree (trace_tree, tvb, 0, + trace_string_length, + hf_vpp_buffer_trace); + return tvb_captured_length(tvb); +} + +/* + * BIG FAT WARNING: it's impossible to #include the vpp header files, + * so this is a private copy of .../src/vnet/buffer.h, with + * some vpp typedefs thrown in for good measure. + */ + +typedef unsigned int u32; +typedef unsigned short int u16; +typedef short int i16; +typedef unsigned char u8; +typedef unsigned long long u64; + +typedef struct +{ + u32 sw_if_index[2]; + i16 l2_hdr_offset; + i16 l3_hdr_offset; + i16 l4_hdr_offset; + u8 feature_arc_index; + u8 dont_waste_me; + + union + { + /* IP4/6 buffer opaque. */ + struct + { + /* Adjacency from destination IP address lookup [VLIB_TX]. + Adjacency from source IP address lookup [VLIB_RX]. + This gets set to ~0 until source lookup is performed. */ + u32 adj_index[2]; + + union + { + struct + { + /* Flow hash value for this packet computed from IP src/dst address + protocol and ports. */ + u32 flow_hash; + + union + { + /* next protocol */ + u32 save_protocol; + + /* Hint for transport protocols */ + u32 fib_index; + }; + + /* Rewrite length */ + u32 save_rewrite_length; + + /* MFIB RPF ID */ + u32 rpf_id; + }; + + /* ICMP */ + struct + { + u8 type; + u8 code; + u32 data; + } icmp; + + /* reassembly */ + union + { + /* in/out variables */ + struct + { + u32 next_index; /* index of next node - ignored if "feature" node */ + u16 estimated_mtu; /* estimated MTU calculated during reassembly */ + }; + /* internal variables used during reassembly */ + struct + { + u16 fragment_first; + u16 fragment_last; + u16 range_first; + u16 range_last; + u32 next_range_bi; + u16 ip6_frag_hdr_offset; + }; + } reass; + }; + + } ip; + + /* + * MPLS: + * data copied from the MPLS header that was popped from the packet + * during the look-up. + */ + struct + { + /* do not overlay w/ ip.adj_index[0,1] nor flow hash */ + u32 pad[3]; + u8 ttl; + u8 exp; + u8 first; + /* Rewrite length */ + u32 save_rewrite_length; + /* + * BIER - the number of bytes in the header. + * the len field in the header is not authoritative. It's the + * value in the table that counts. + */ + struct + { + u8 n_bytes; + } bier; + } mpls; + + /* l2 bridging path, only valid there */ + struct opaque_l2 + { + u32 feature_bitmap; + u16 bd_index; /* bridge-domain index */ + u8 l2_len; /* ethernet header length */ + u8 shg; /* split-horizon group */ + u16 l2fib_sn; /* l2fib bd/int seq_num */ + u8 bd_age; /* aging enabled */ + } l2; + + /* l2tpv3 softwire encap, only valid there */ + struct + { + u32 pad[4]; /* do not overlay w/ ip.adj_index[0,1] */ + u8 next_index; + u32 session_index; + } l2t; + + /* L2 classify */ + struct + { + struct opaque_l2 pad; + union + { + u32 table_index; + u32 opaque_index; + }; + u64 hash; + } l2_classify; + + /* vnet policer */ + struct + { + u32 pad[8 - 2 - 1]; /* to end of opaque */ + u32 index; + } policer; + + /* interface output features */ + struct + { + u32 flags; + u32 sad_index; + } ipsec; + + /* MAP */ + struct + { + u16 mtu; + } map; + + /* MAP-T */ + struct + { + u32 map_domain_index; + struct + { + u32 saddr, daddr; + u16 frag_offset; //Fragmentation header offset + u16 l4_offset; //L4 header overall offset + u8 l4_protocol; //The final protocol number + } v6; //Used by ip6_map_t only + u16 checksum_offset; //L4 checksum overall offset + u16 mtu; //Exit MTU + } map_t; + + /* IP Fragmentation */ + struct + { + u32 pad[2]; /* do not overlay w/ ip.adj_index[0,1] */ + u16 mtu; + u8 next_index; + u8 flags; //See ip_frag.h + } ip_frag; + + /* COP - configurable junk filter(s) */ + struct + { + /* Current configuration index. */ + u32 current_config_index; + } cop; + + /* LISP */ + struct + { + /* overlay address family */ + u16 overlay_afi; + } lisp; + + /* TCP */ + struct + { + u32 connection_index; + u32 seq_number; + u32 seq_end; + u32 ack_number; + u16 hdr_offset; /**< offset relative to ip hdr */ + u16 data_offset; /**< offset relative to ip hdr */ + u16 data_len; /**< data len */ + u8 flags; + } tcp; + + /* SCTP */ + struct + { + u32 connection_index; + u16 sid; /**< Stream ID */ + u16 ssn; /**< Stream Sequence Number */ + u32 tsn; /**< Transmission Sequence Number */ + u16 hdr_offset; /**< offset relative to ip hdr */ + u16 data_offset; /**< offset relative to ip hdr */ + u16 data_len; /**< data len */ + u8 subconn_idx; /**< index of the sub_connection being used */ + u8 flags; + } sctp; + + /* SNAT */ + struct + { + u32 flags; + } snat; + + u32 unused[6]; + }; +} vnet_buffer_opaque_t; + + +#define PTAS proto_tree_add_string(opaque_tree, \ + hf_vpp_buffer_opaque_opaque, \ + tvb, 0, strlen(tmpbuf), tmpbuf) + +static int +dissect_vpp_opaque (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, + void* data _U_) +{ + int offset = 0; + proto_item *ti; + proto_tree *opaque_tree; + char tmpbuf [512]; + int print_offset; + guint32 opaque[10]; + vnet_buffer_opaque_t _o, *o = &_o; + + int i; + + col_set_str(pinfo->cinfo, COL_PROTOCOL, "VPP-Opaque"); + col_clear(pinfo->cinfo, COL_INFO); + + ti = proto_tree_add_item(tree, proto_vpp_opaque, tvb, offset, -1, ENC_NA); + opaque_tree = proto_item_add_subtree(ti, ett_vpp_opaque); + + print_offset = 0; + for (i = 0; i < 10; i++) { + opaque[i] = tvb_get_guint32 (tvb, offset + 4*i, ENC_LITTLE_ENDIAN); + snprintf (tmpbuf + print_offset, sizeof(tmpbuf) - print_offset, + "%08x ", opaque[i]); + print_offset = strlen (tmpbuf); + } + offset += 40; + + proto_tree_add_string (opaque_tree, hf_vpp_buffer_opaque_raw, tvb, 0, + strlen(tmpbuf), tmpbuf); + + memset (o, 0, sizeof (*o)); + memcpy (o, opaque, sizeof (opaque)); + + snprintf (tmpbuf, sizeof(tmpbuf), + "sw_if_index[VLIB_RX]: %d, sw_if_index[VLIB_TX]: %d", + o->sw_if_index[0], o->sw_if_index[1]); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "L2 offset %d, L3 offset %d, L4 offset %d, feature arc index %d", + (u32)(o->l2_hdr_offset), + (u32)(o->l3_hdr_offset), + (u32)(o->l4_hdr_offset), + (u32)(o->feature_arc_index)); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "ip.adj_index[VLIB_RX]: %d, ip.adj_index[VLIB_TX]: %d", + (u32)(o->ip.adj_index[0]), + (u32)(o->ip.adj_index[1])); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "ip.flow_hash: 0x%x, ip.save_protocol: 0x%x, ip.fib_index: %d", + o->ip.flow_hash, o->ip.save_protocol, o->ip.fib_index); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "ip.save_rewrite_length: %d, ip.rpf_id: %d", + o->ip.save_rewrite_length, o->ip.rpf_id); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "ip.icmp.type: %d ip.icmp.code: %d, ip.icmp.data: 0x%x", + (u32)(o->ip.icmp.type), + (u32)(o->ip.icmp.code), + o->ip.icmp.data); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "ip.reass.next_index: %d, ip.reass.estimated_mtu: %d", + o->ip.reass.next_index, (u32)(o->ip.reass.estimated_mtu)); + PTAS; + snprintf (tmpbuf, sizeof(tmpbuf), + "ip.reass.fragment_first: %d ip.reass.fragment_last: %d", + (u32)(o->ip.reass.fragment_first), + (u32)(o->ip.reass.fragment_last)); + PTAS; + snprintf (tmpbuf, sizeof(tmpbuf), + "ip.reass.range_first: %d ip.reass.range_last: %d", + (u32)(o->ip.reass.range_first), + (u32)(o->ip.reass.range_last)); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "ip.reass.next_range_bi: 0x%x, ip.reass.ip6_frag_hdr_offset: %d", + o->ip.reass.next_range_bi, + (u32)(o->ip.reass.ip6_frag_hdr_offset)); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "mpls.ttl: %d, mpls.exp: %d, mpls.first: %d, " + "mpls.save_rewrite_length: %d, mpls.bier.n_bytes: %d", + (u32)(o->mpls.ttl), (u32)(o->mpls.exp), (u32)(o->mpls.first), + o->mpls.save_rewrite_length, (u32)(o->mpls.bier.n_bytes)); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "l2.feature_bitmap: %08x, l2.bd_index: %d, l2.l2_len: %d, " + "l2.shg: %d, l2.l2fib_sn: %d, l2.bd_age: %d", + o->l2.feature_bitmap, (u32)(o->l2.bd_index), + (u32)(o->l2.l2_len), (u32)(o->l2.shg), (u32)(o->l2.l2fib_sn), + (u32)(o->l2.bd_age)); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "l2t.next_index: %d, l2t.session_index: %d", + (u32)(o->l2t.next_index), o->l2t.session_index); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "l2_classify.table_index: %d, l2_classify.opaque_index: %d, " + "l2_classify.hash: 0x%llx", + o->l2_classify.table_index, + o->l2_classify.opaque_index, + o->l2_classify.hash); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "policer.index: %d", o->policer.index); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "ipsec.flags: 0x%x, ipsec.sad_index: %d", + o->ipsec.flags, o->ipsec.sad_index); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "map.mtu: %d", (u32)(o->map.mtu)); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "map_t.v6.saddr: 0x%x, map_t.v6.daddr: 0x%x, " + "map_t.v6.frag_offset: %d, map_t.v6.l4_offset: %d", + o->map_t.v6.saddr, + o->map_t.v6.daddr, + (u32)(o->map_t.v6.frag_offset), + (u32)(o->map_t.v6.l4_offset)); + PTAS; + snprintf (tmpbuf, sizeof(tmpbuf), + "map_t.v6.l4_protocol: %d, map_t.checksum_offset: %d, " + "map_t.mtu: %d", + (u32)(o->map_t.v6.l4_protocol), + (u32)(o->map_t.checksum_offset), + (u32)(o->map_t.mtu)); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "ip_frag.mtu: %d, ip_frag.next_index: %d, ip_frag.flags: 0x%x", + (u32)(o->ip_frag.mtu), + (u32)(o->ip_frag.next_index), + (u32)(o->ip_frag.flags)); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "cop.current_config_index: %d", + o->cop.current_config_index); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "lisp.overlay_afi: %d", + (u32)(o->lisp.overlay_afi)); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "tcp.connection_index: %d, tcp.seq_number: %d, tcp.seq_end: %d, " + "tcp.ack_number: %d, tcp.hdr_offset: %d, tcp.data_offset: %d", + o->tcp.connection_index, + o->tcp.seq_number, + o->tcp.seq_end, + o->tcp.ack_number, + (u32)(o->tcp.hdr_offset), + (u32)(o->tcp.data_offset)); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "tcp.data_len: %d, tcp.flags: 0x%x", + (u32)(o->tcp.data_len), + (u32)(o->tcp.flags)); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "sctp.connection_index: %d, sctp.sid: %d, sctp.ssn: %d, " + "sctp.tsn: %d, sctp.hdr_offset: %d", + o->sctp.connection_index, + (u32)(o->sctp.sid), + (u32)(o->sctp.ssn), + (u32)(o->sctp.tsn), + (u32)(o->sctp.hdr_offset)); + PTAS; + snprintf (tmpbuf, sizeof(tmpbuf), + "sctp.data_offset: %d, sctp.data_len: %d, sctp.subconn_idx: %d, " + "sctp.flags: 0x%x", + (u32)(o->sctp.data_offset), + (u32)(o->sctp.data_len), + (u32)(o->sctp.subconn_idx), + (u32)(o->sctp.flags)); + PTAS; + + snprintf (tmpbuf, sizeof(tmpbuf), + "snat.flags: 0x%x", + o->snat.flags); + PTAS; + + return tvb_captured_length(tvb); +} + + +static int +dissect_vpp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) +{ + proto_item *ti; + proto_tree *vpp_tree; + tvbuff_t *opaque_tvb, *eth_tvb, *trace_tvb; + int offset = 0; + guint8 major_version, minor_version; + guint8 name_length; + guint8 *name; + guint16 trace_length; + int i, found; + static const int *buffer_flags[] = { + &hf_vpp_buffer_flag_non_default_freelist, + &hf_vpp_buffer_flag_traced, + &hf_vpp_buffer_flag_next_present, + &hf_vpp_buffer_flag_total_length_valid, + &hf_vpp_buffer_flag_ext_hdr_valid, + &hf_vpp_buffer_flag_l4_checksum_computed, + &hf_vpp_buffer_flag_l4_checksum_correct, + &hf_vpp_buffer_flag_vlan_2_deep, + &hf_vpp_buffer_flag_vlan_1_deep, + &hf_vpp_buffer_flag_span_clone, + &hf_vpp_buffer_flag_loop_counter_valid, + &hf_vpp_buffer_flag_locally_originated, + &hf_vpp_buffer_flag_is_ip4, + &hf_vpp_buffer_flag_is_ip6, + &hf_vpp_buffer_flag_offload_ip_checksum, + &hf_vpp_buffer_flag_offload_tcp_checksum, + &hf_vpp_buffer_flag_offload_udp_checksum, + &hf_vpp_buffer_flag_is_natted, + &hf_vpp_buffer_flag_l2_hdr_offset_valid, + &hf_vpp_buffer_flag_l3_hdr_offset_valid, + &hf_vpp_buffer_flag_l4_hdr_offset_valid, + &hf_vpp_buffer_flag_flow_report, + &hf_vpp_buffer_flag_is_dvr, + &hf_vpp_buffer_flag_qos_data_valid, + NULL + }; + + col_set_str(pinfo->cinfo, COL_PROTOCOL, "VPP"); + col_clear(pinfo->cinfo, COL_INFO); + + ti = proto_tree_add_item(tree, proto_vpp, tvb, offset, -1, ENC_NA); + vpp_tree = proto_item_add_subtree(ti, ett_vpp); + + major_version = tvb_get_guint8 (tvb, offset); + offset++; + + minor_version = tvb_get_guint8 (tvb, offset); + offset++; + + if (major_version != 1 || minor_version != 0) + ws_debug_printf ("WARNING: version mismatch (%d, %d)", + major_version, minor_version); + + /* Skip the buffer index */ + offset += 4; + + /* Recover the node name */ + name_length = tvb_get_guint8 (tvb, offset); + offset++; + + name = (guint8 *) g_malloc (name_length + 1); + for (i = 0; i < name_length; i++, offset++) { + name[i] = tvb_get_guint8 (tvb, offset); + } + name[i] = 0; + offset++; + + proto_tree_add_string(vpp_tree, hf_vpp_nodename, tvb, 5, name_length, + name); + proto_tree_add_item(vpp_tree, hf_vpp_buffer_index, tvb, + 0 /* bi at offset 0 */, 4, ENC_LITTLE_ENDIAN); + + proto_tree_add_item(vpp_tree, hf_vpp_buffer_current_data, tvb, + offset, 2, ENC_LITTLE_ENDIAN); + offset += 2; + proto_tree_add_item(vpp_tree, hf_vpp_buffer_current_length, tvb, + offset, 2, ENC_LITTLE_ENDIAN); + offset += 2; + + proto_tree_add_bitmask(vpp_tree, tvb, offset, + hf_vpp_buffer_flags, ett_vpp, + buffer_flags, ENC_LITTLE_ENDIAN); + offset += 4; + + proto_tree_add_item(vpp_tree, hf_vpp_buffer_flow_id, tvb, + offset, 4, ENC_LITTLE_ENDIAN); + offset += 4; + + proto_tree_add_item(vpp_tree, hf_vpp_buffer_next_buffer, tvb, + offset, 4, ENC_LITTLE_ENDIAN); + offset += 4; + + proto_tree_add_item(vpp_tree, hf_vpp_buffer_current_config_index, tvb, + offset, 4, ENC_LITTLE_ENDIAN); + offset += 4; + + proto_tree_add_item(vpp_tree, hf_vpp_buffer_error_index, tvb, + offset, 2, ENC_LITTLE_ENDIAN); + offset += 2; + + proto_tree_add_item(vpp_tree, hf_vpp_buffer_n_add_refs, tvb, + offset, 1, ENC_LITTLE_ENDIAN); + offset += 1; + + proto_tree_add_item(vpp_tree, hf_vpp_buffer_buffer_pool_index, tvb, + offset, 1, ENC_LITTLE_ENDIAN); + offset += 1; + + opaque_tvb = tvb_new_subset_remaining (tvb, offset); + call_dissector (vpp_opaque_dissector_handle, opaque_tvb, pinfo, tree); + + /* Skip opaque */ + offset += 40; + /* skip second opaque line */ + offset += 64; + + trace_length = tvb_get_guint16 (tvb, offset, ENC_LITTLE_ENDIAN); + offset += 2; + + if (trace_length > 0) { + trace_tvb = tvb_new_subset_remaining (tvb, offset); + offset += trace_length; + + call_dissector (vpp_trace_dissector_handle, trace_tvb, pinfo, tree); + } + + eth_tvb = tvb_new_subset_remaining (tvb, offset); + + found = 0; + +#define _(a,b,c) \ + { \ + if (!strcmp (name, a)) { \ + call_dissector (c, eth_tvb, pinfo, tree); \ + found = 1; \ + } \ + } + foreach_node_to_dissector_handle; +#undef _ + if (found == 0) + call_dissector (eth_dissector_handle, eth_tvb, pinfo, tree); + + g_free (name); + return tvb_captured_length(tvb); +} + +void +proto_register_vpp(void) +{ + static hf_register_info hf[] = { + { &hf_vpp_buffer_index, + { "BufferIndex", "vpp.bufferindex", FT_UINT32, BASE_HEX, NULL, 0x0, + NULL, HFILL }, + }, + { &hf_vpp_nodename, + { "NodeName", "vpp.nodename", FT_STRINGZ, BASE_NONE, NULL, 0x0, + NULL, HFILL }, + }, + { &hf_vpp_buffer_current_data, + { "CurrentData", "vpp.current_data", FT_INT16, BASE_DEC, NULL, 0x0, + NULL, HFILL }, + }, + { &hf_vpp_buffer_current_length, + { "CurrentLength", "vpp.current_length", FT_UINT16, BASE_DEC, NULL, 0x0, + NULL, HFILL }, + }, + + /* + * Warning: buffer flag bits are not cast in concrete, and it's + * impossible to imagine trying to compile WS with even a subset + * of the actual header files. + * + * See .../src/vlib/buffer.h, .../src/vnet/buffer.h in + * the fd.io vpp source tree. + */ + + { &hf_vpp_buffer_flags, + { "BufferFlags", "vpp.flags", FT_UINT32, BASE_HEX, NULL, 0x0, + NULL, HFILL }, + }, + + { &hf_vpp_buffer_flag_non_default_freelist, + { "NonDefaultFreelist", "vpp.flags.non_default_freelist", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x1, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_traced, + { "Traced", "vpp.flags.traced", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x2, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_next_present, + { "NextPresent", "vpp.flags.next_present", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x4, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_total_length_valid, + { "TotalLengthValid", "vpp.flags.total_length_valid", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x8, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_ext_hdr_valid, + { "ExtHeaderValid", "vpp.flags.ext_hdr_valid", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x10, NULL, HFILL }, + }, + + { &hf_vpp_buffer_flag_l4_checksum_computed, + { "L4ChecksumComputed", "vpp.flags.l4_checksum_computed", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x80000000, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_l4_checksum_correct, + { "L4ChecksumCorrect", "vpp.flags.l4_checksum_correct", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x40000000, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_vlan_2_deep, + { "Vlan2Deep", "vpp.flags.vlan_2_deep", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x20000000, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_vlan_1_deep, + { "Vlan1Deep", "vpp.flags.vlan_1_deep", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x10000000, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_span_clone, + { "SpanClone", "vpp.flags.span_clone", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x08000000, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_loop_counter_valid, + { "LoopCounterValid", "vpp.flags.loop_counter_valid", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x04000000, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_locally_originated, + { "LocallyOriginated", "vpp.flags.locally_originated", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x02000000, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_is_ip4, + { "IsIP4", "vpp.flags.is_ip4", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x01000000, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_is_ip6, + { "IsIP4", "vpp.flags.is_ip6", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x00800000, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_offload_ip_checksum, + { "OffloadIPChecksum", "vpp.flags.offload_ip_checksum", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x00400000, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_offload_tcp_checksum, + { "OffloadTCPChecksum", "vpp.flags.offload_tcp_checksum", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x00200000, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_offload_udp_checksum, + { "OffloadUDPChecksum", "vpp.flags.offload_udp_checksum", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x00100000, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_is_natted, + { "IsNATted", "vpp.flags.is_natted", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x00080000, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_l2_hdr_offset_valid, + { "L2HdrOffsetValid", "vpp.flags.l2_hdr_offset_valid", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x00040000, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_l3_hdr_offset_valid, + { "L3HdrOffsetValid", "vpp.flags.l3_hdr_offset_valid", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x00020000, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_l4_hdr_offset_valid, + { "L4HdrOffsetValid", "vpp.flags.l4_hdr_offset_valid", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x00010000, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_flow_report, + { "FlowReport", "vpp.flags.flow_report", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x00008000, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_is_dvr, + { "IsDVR", "vpp.flags.is_dvr", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x00004000, NULL, HFILL }, + }, + { &hf_vpp_buffer_flag_qos_data_valid, + { "QOSDataValid", "vpp.flags.qos_data_valid", + FT_BOOLEAN, 32, TFS(&tfs_true_false), 0x00002000, NULL, HFILL }, + }, + + { &hf_vpp_buffer_flow_id, + { "FlowID", "vpp.flow_id", FT_UINT32, BASE_DEC, NULL, 0x0, + NULL, HFILL }, + }, + { &hf_vpp_buffer_next_buffer, + { "NextBuffer", "vpp.next_buffer", FT_UINT32, BASE_DEC, NULL, 0x0, + NULL, HFILL }, + }, + { &hf_vpp_buffer_current_config_index, + { "CurrentConfigIndex", "vpp.current_config_index", + FT_UINT32, BASE_DEC, NULL, 0x0, + NULL, HFILL }, + }, + { &hf_vpp_buffer_error_index, + { "ErrorIndex", "vpp.error_index", + FT_UINT16, BASE_DEC, NULL, 0x0, + NULL, HFILL }, + }, + { &hf_vpp_buffer_n_add_refs, + { "AddRefs", "vpp.n_add_refs_index", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL }, + }, + { &hf_vpp_buffer_buffer_pool_index, + { "BufferPoolIndex", "vpp.buffer_pool_index", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL }, + }, + }; + + static hf_register_info opaque_hf[] = { + { &hf_vpp_buffer_opaque_raw, + { "Raw ", "vppMetadata.opaque_raw", FT_STRINGZ, BASE_NONE, NULL, 0x0, + NULL, HFILL }, + }, + { &hf_vpp_buffer_opaque_opaque, + { "Opaque", "vppMetadata.opaque", + FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL }, + }, + }; + + static hf_register_info trace_hf[] = { + { &hf_vpp_buffer_trace, + { "Trace", "vppTrace.trace", FT_STRINGZ, BASE_NONE, NULL, 0x0, + NULL, HFILL }, + }, + }; + + static gint *ett[] = { + &ett_vpp, + }; + static gint *ett_opaque[] = { + &ett_vpp_opaque, + }; + static gint *ett_trace[] = { + &ett_vpp_trace, + }; + + proto_vpp = proto_register_protocol("VPP Buffer Metadata", "VPP", "vpp"); + proto_register_field_array(proto_vpp, hf, array_length(hf)); + proto_register_subtree_array (ett, array_length(ett)); + register_dissector("vpp", dissect_vpp, proto_vpp); + + proto_vpp_opaque = proto_register_protocol("VPP Buffer Opaque", "VPP-Opaque", + "vpp-opaque"); + proto_register_field_array(proto_vpp_opaque, opaque_hf, + array_length(opaque_hf)); + proto_register_subtree_array (ett_opaque, array_length(ett_opaque)); + register_dissector("vppOpaque", dissect_vpp_opaque, proto_vpp_opaque); + + proto_vpp_trace = proto_register_protocol("VPP Buffer Trace", "VPP-Trace", + "vpp-trace"); + proto_register_field_array(proto_vpp_trace, trace_hf, + array_length(trace_hf)); + proto_register_subtree_array (ett_trace, array_length(ett_trace)); + register_dissector("vppTrace", dissect_vpp_trace, proto_vpp_trace); + +#define _(a,b,c) c = find_dissector(b); + foreach_node_to_dissector_handle; +#undef _ +} + +void +proto_reg_handoff_vpp(void) +{ + vpp_dissector_handle = find_dissector("vpp"); + vpp_opaque_dissector_handle = find_dissector("vppOpaque"); + vpp_trace_dissector_handle = find_dissector("vppTrace"); + dissector_add_uint("wtap_encap", WTAP_ENCAP_USER13, vpp_dissector_handle); +} + +/* + * Editor modelines - http://www.wireshark.org/tools/modelines.html + * + * Local variables: + * c-basic-offset: 4 + * tab-width: 8 + * indent-tabs-mode: nil + * End: + * + * vi: set shiftwidth=4 tabstop=8 expandtab: + * :indentSize=4:tabSize=8:noTabs=true: + */ diff --git a/extras/wireshark/readme.md b/extras/wireshark/readme.md new file mode 100644 index 00000000000..d47806d53f2 --- /dev/null +++ b/extras/wireshark/readme.md @@ -0,0 +1,81 @@ +How to build a vpp dispatch trace aware Wireshark +================================================= + +At some point, we will upstream our vpp pcap dispatch trace dissector. +It's not finished - contributions welcome - and we have to work through +whatever issues will be discovered during the upstreaming process. + +On the other hand, it's ready for some tire-kicking. Here's how to build +wireshark + +Download and patch wireshark source code +----------------------------------------- + +The wireshark git repo is large, so it takes a while to clone. + +``` + git clone https://code.wireshark.org/review/wireshark + cp .../extras/wireshark/packet-vpp.c wireshark/epan/dissectors + patch -p1 < .../extras/wireshark/diffs.txt +``` + +The small patch adds packet-vpp.c to the dissector list. + +Install prerequisite Debian packages +------------------------------------ + +Here is a list of prerequisite packages which must be present in order +to compile wireshark, beyond what's typically installed on an Ubuntu +18.04 system: + +``` + libgcrypt11-dev flex bison qtbase5-dev qttools5-dev-tools qttools5-dev + qtmultimedia5-dev libqt5svg5-dev libpcap-dev qt5-default +``` + +Compile Wireshark +----------------- + +Mercifully, Wireshark uses cmake, so it's relatively easy to build, at +least on Ubuntu 18.04. + + +``` + $ cd wireshark + $ cmake -G Ninja + $ ninja -j 8 + $ sudo ninja install +``` + +Make a pcap dispatch trace +-------------------------- + +Configure vpp to pass traffic in some fashion or other, and then: + +``` + vpp# pcap dispatch trace on max 10000 file vppcapture buffer-trace dpdk-input 1000 + +``` + +or similar. Run traffic for long enough to capture some data. Save the +dispatch trace capture like so: + +``` + vpp# pcap dispatch trace off +``` + +Display in Wireshark +-------------------- + +Display /tmp/vppcapture in the vpp-enabled version of wireshark. With +any luck, normal version of wireshark will refuse to process vpp +dispatch trace pcap files because they won't understand the encap type. + +Set wireshark to filter on vpp.bufferindex to watch a single packet +traverse the forwarding graph. Otherwise, you'll see a vector of packets +in e.g. ip4-lookup, then a vector of packets in ip4-rewrite, etc. + + + + + |