sys: add basic llc packet descriptions

4 files changed, 104 insertions, 0 deletions

diff --git a/sys/vnet.txt b/sys/vnet.txt
index 216a635ce..56c9b88fd 100644
--- a/sys/vnet.txt
+++ b/sys/vnet.txt
@@ -80,6 +80,7 @@ eth2_packet {
 
 eth2_payload [
 	arp		arp_packet
+	llc		llc_packet
 	ipx		ipx_packet
 	x25		x25_packet
 	ipv4		ipv4_packet
@@ -141,6 +142,46 @@ arp_packet [
 ] [varlen]
 
 ################################################################################
+################################## 802.2 (LLC) #################################
+################################################################################
+
+# https://en.wikipedia.org/wiki/IEEE_802.2
+# https://en.wikipedia.org/wiki/Subnetwork_Access_Protocol
+
+include <uapi/linux/llc.h>
+
+# Adding '1' as a SAP value since the lower bit in SAP has a special meaning.
+sap_values = 1, LLC_SAP_NULL, LLC_SAP_LLC, LLC_SAP_SNA, LLC_SAP_PNM, LLC_SAP_IP, LLC_SAP_BSPAN, LLC_SAP_MMS, LLC_SAP_8208, LLC_SAP_3COM, LLC_SAP_PRO, LLC_SAP_SNAP, LLC_SAP_BANYAN, LLC_SAP_IPX, LLC_SAP_NETBEUI, LLC_SAP_LANMGR, LLC_SAP_IMPL, LLC_SAP_DISC, LLC_SAP_OSI, LLC_SAP_LAR, LLC_SAP_RM, LLC_SAP_GLOBAL
+
+llc_generic_packet {
+	dsap		flags[sap_values, int8]
+	ssap		flags[sap_values, int8]
+	ctrl		array[int8, 1:2]
+	payload		array[int8]
+} [packed]
+
+sap_snap_values = 1, LLC_SAP_SNAP
+
+llc_snap_packet {
+	dsap		flags[sap_snap_values, int8]
+	ssap		flags[sap_snap_values, int8]
+	control		array[int8, 1:2]
+	oui		array[int8, 3]
+	protocol_id	flags[ether_types, int16be]
+	payload		array[int8]
+} [packed]
+
+llc_payload [
+	llc		llc_generic_packet
+	snap		llc_snap_packet
+] [varlen]
+
+llc_packet {
+	length		len[payload, int16be]
+	payload		llc_payload
+} [packed]
+
+################################################################################
 ###################################### IPX #####################################
 ################################################################################
 
diff --git a/sys/vnet_amd64.const b/sys/vnet_amd64.const
index cf9ff9faf..43e8d186c 100644
--- a/sys/vnet_amd64.const
+++ b/sys/vnet_amd64.const
@@ -274,6 +274,27 @@ IPX_TYPE_RIP = 1
 IPX_TYPE_SAP = 4
 IPX_TYPE_SPX = 5
 IPX_TYPE_UNKNOWN = 0
+LLC_SAP_3COM = 128
+LLC_SAP_8208 = 126
+LLC_SAP_BANYAN = 188
+LLC_SAP_BSPAN = 66
+LLC_SAP_DISC = 252
+LLC_SAP_GLOBAL = 255
+LLC_SAP_IMPL = 248
+LLC_SAP_IP = 6
+LLC_SAP_IPX = 224
+LLC_SAP_LANMGR = 244
+LLC_SAP_LAR = 220
+LLC_SAP_LLC = 2
+LLC_SAP_MMS = 78
+LLC_SAP_NETBEUI = 240
+LLC_SAP_NULL = 0
+LLC_SAP_OSI = 254
+LLC_SAP_PNM = 14
+LLC_SAP_PRO = 142
+LLC_SAP_RM = 212
+LLC_SAP_SNA = 4
+LLC_SAP_SNAP = 170
 NEXTHDR_AUTH = 51
 NEXTHDR_DEST = 60
 NEXTHDR_ESP = 50
diff --git a/sys/vnet_arm64.const b/sys/vnet_arm64.const
index cf9ff9faf..43e8d186c 100644
--- a/sys/vnet_arm64.const
+++ b/sys/vnet_arm64.const
@@ -274,6 +274,27 @@ IPX_TYPE_RIP = 1
 IPX_TYPE_SAP = 4
 IPX_TYPE_SPX = 5
 IPX_TYPE_UNKNOWN = 0
+LLC_SAP_3COM = 128
+LLC_SAP_8208 = 126
+LLC_SAP_BANYAN = 188
+LLC_SAP_BSPAN = 66
+LLC_SAP_DISC = 252
+LLC_SAP_GLOBAL = 255
+LLC_SAP_IMPL = 248
+LLC_SAP_IP = 6
+LLC_SAP_IPX = 224
+LLC_SAP_LANMGR = 244
+LLC_SAP_LAR = 220
+LLC_SAP_LLC = 2
+LLC_SAP_MMS = 78
+LLC_SAP_NETBEUI = 240
+LLC_SAP_NULL = 0
+LLC_SAP_OSI = 254
+LLC_SAP_PNM = 14
+LLC_SAP_PRO = 142
+LLC_SAP_RM = 212
+LLC_SAP_SNA = 4
+LLC_SAP_SNAP = 170
 NEXTHDR_AUTH = 51
 NEXTHDR_DEST = 60
 NEXTHDR_ESP = 50
diff --git a/sys/vnet_ppc64le.const b/sys/vnet_ppc64le.const
index cf9ff9faf..43e8d186c 100644
--- a/sys/vnet_ppc64le.const
+++ b/sys/vnet_ppc64le.const
@@ -274,6 +274,27 @@ IPX_TYPE_RIP = 1
 IPX_TYPE_SAP = 4
 IPX_TYPE_SPX = 5
 IPX_TYPE_UNKNOWN = 0
+LLC_SAP_3COM = 128
+LLC_SAP_8208 = 126
+LLC_SAP_BANYAN = 188
+LLC_SAP_BSPAN = 66
+LLC_SAP_DISC = 252
+LLC_SAP_GLOBAL = 255
+LLC_SAP_IMPL = 248
+LLC_SAP_IP = 6
+LLC_SAP_IPX = 224
+LLC_SAP_LANMGR = 244
+LLC_SAP_LAR = 220
+LLC_SAP_LLC = 2
+LLC_SAP_MMS = 78
+LLC_SAP_NETBEUI = 240
+LLC_SAP_NULL = 0
+LLC_SAP_OSI = 254
+LLC_SAP_PNM = 14
+LLC_SAP_PRO = 142
+LLC_SAP_RM = 212
+LLC_SAP_SNA = 4
+LLC_SAP_SNAP = 170
 NEXTHDR_AUTH = 51
 NEXTHDR_DEST = 60
 NEXTHDR_ESP = 50