--- /dev/null
+/* 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:
+ */
Code Review / vpp.git / commitdiff