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vpp/extras/wireshark/packet-vpp.c
Dave Barach c2b4dc5981 Use a dissector table instead of strcmp 
... to map vpp node names to dissector handles.

Wireshark has an easy-to-use string to dissector function handle
hashing scheme, so use it. Thanks to Guy Harris for writing up the
incantation.

Change-Id: I6c1eb609332b0afe87154ba447a98f783e13ca68
Signed-off-by: Dave Barach <dave@barachs.net>
2018-11-25 16:47:45 +00:00

1008 lines
33 KiB
C
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/* 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:
*/
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