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| author |   Dave Barach <dave@barachs.net> | 2018-11-27 16:52:59 -0500 |
|---|---|---|
| committer |   Florin Coras <florin.coras@gmail.com> | 2018-11-30 20:18:54 +0000 |
| commit | 7fff3d205463d5e0a95d6bdd337100988ef323a3 (patch) | |
| tree | 7743d004b00a2e674e95c4d1593ae94c09b8a8b5 /src/vnet/buffer.c | |
| parent | 8861c1a1f229b4727fea48bfe5990808bb30f871 (diff) | |
Metadata / opaque formatting belongs in vpp
VPP graph dispatch trace record description:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Major Version | Minor Version | NStrings | ProtoHint |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Buffer index (big endian) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ VPP graph node name ... ... | NULL octet |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Buffer Metadata ... ... | NULL octet |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Buffer Opaque ... ... | NULL octet |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Buffer Opaque 2 ... ... | NULL octet |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| VPP ASCII packet trace (if NStrings > 4) | NULL octet |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Packet data (up to 16K) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Graph dispatch records comprise a version stamp, an indication of how
many NULL-terminated strings will follow the record header, and a
protocol hint.
The buffer index allows downstream consumers of these data to easily
filter/track single packets as they traverse the forwarding
graph. FWIW, the 32-bit buffer index is stored in big endian format.
As of this writing, major version = 1, minor version = 0. Nstrings
will be either 4 or 5.
Here is the current set of protocol hints:
typedef enum
{
VLIB_NODE_PROTO_HINT_NONE = 0,
VLIB_NODE_PROTO_HINT_ETHERNET,
VLIB_NODE_PROTO_HINT_IP4,
VLIB_NODE_PROTO_HINT_IP6,
VLIB_NODE_PROTO_HINT_TCP,
VLIB_NODE_PROTO_HINT_UDP,
VLIB_NODE_N_PROTO_HINTS,
} vlib_node_proto_hint_t;
Example: VLIB_NODE_PROTO_HINT_IP6 means that the first octet of packet
data SHOULD be 0x60, and should begin an ipv6 packet header.
Change-Id: Idf310bad80cc0e4207394c80f18db5f77c378741
Signed-off-by: Dave Barach <dave@barachs.net>
Diffstat (limited to 'src/vnet/buffer.c')
| -rw-r--r-- | src/vnet/buffer.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/vnet/buffer.c b/src/vnet/buffer.c index de1c73597e3..cf61780cb74 100644 --- a/src/vnet/buffer.c +++ b/src/vnet/buffer.c @@ -24,9 +24,9 @@ format_vnet_buffer (u8 * s, va_list * args) u32 indent = format_get_indent (s); u8 *a = 0; -#define _(bit, name, v) \ +#define _(bit,name,ss,v) \ if (v && (b->flags & VNET_BUFFER_F_##name)) \ - a = format (a, "%s ", v); + a = format (a, "%s ", ss); foreach_vnet_buffer_flag #undef _ if (b->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID) |