| /* 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_table_t vpp_subdissector_table; |
| |
| /* List of next dissector names that we know about */ |
| #define foreach_next_dissector \ |
| _(eth_maybefcs) \ |
| _(ip) \ |
| _(ipv6) \ |
| _(udp) |
| |
| #define _(a) static dissector_handle_t a##_dissector_handle; |
| foreach_next_dissector; |
| #undef _ |
| |
| /* |
| * node-name, next dissector name pairs |
| * |
| * Unfortunately, -Werror=c++-compat causes |
| * the node names "ipX-not-enabled" to throw a shoe if |
| * not explicitly quoted. Never mind that the first macro |
| * arg is [only] used as a string (#xxx). |
| */ |
| |
| #define foreach_node_to_dissector_pair \ |
| _("ip6-lookup", ipv6) \ |
| _("ip4-input", ip) \ |
| _("ip4-not-enabled", ip) \ |
| _("ip4-input-no-checksum", ip) \ |
| _("ip4-lookup", ip) \ |
| _("ip4-local", ip) \ |
| _("ip4-udp-lookup", udp) \ |
| _("ip4-icmp-error", ip) \ |
| _("ip4-glean", ip) \ |
| _("ethernet-input", eth_maybefcs) |
| |
| 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; |
| 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); |
| |
| /* |
| * Delegate the rest of the packet dissection to the per-node |
| * next dissector in the foreach_node_to_dissector_pair list |
| * |
| * Failing that, pretend its an ethernet packet |
| */ |
| if (!dissector_try_string (vpp_subdissector_table, name, eth_tvb, |
| pinfo, tree, NULL)) |
| call_dissector (eth_maybefcs_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); |
| |
| vpp_subdissector_table = register_dissector_table |
| ("vpp", "VPP per-node next dissector table", proto_vpp, |
| FT_STRING, BASE_NONE); |
| |
| #define _(n,d) \ |
| d##_dissector_handle = find_dissector(#d); \ |
| dissector_add_string ("vpp", n, d##_dissector_handle); |
| foreach_node_to_dissector_pair; |
| #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: |
| */ |