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authorStefan Sørensen <stefan.sorensen@spectralink.com>2014-06-27 11:59:10 +0200
committerDavid S. Miller <davem@davemloft.net>2014-07-07 16:57:18 -0700
commitae5c6c6d7bcadfbedefb5fc8ff0ebe2bfa83a0a1 (patch)
treed1071ae8d47415a2575f689e54e35119f541befd /net/core/ptp_classifier.c
parentnet: Simplify ptp class checks (diff)
downloadlinux-dev-ae5c6c6d7bcadfbedefb5fc8ff0ebe2bfa83a0a1.tar.xz
linux-dev-ae5c6c6d7bcadfbedefb5fc8ff0ebe2bfa83a0a1.zip
ptp: Classify ptp over ip over vlan packets
This extends the ptp bpf to also match ptp over ip over vlan packets. The ptp classes are changed to orthogonal bitfields representing version, transport and vlan values to simplify matching. Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/ptp_classifier.c')
-rw-r--r--net/core/ptp_classifier.c64
1 files changed, 58 insertions, 6 deletions
diff --git a/net/core/ptp_classifier.c b/net/core/ptp_classifier.c
index d3027a73fd4b..12ab7b4be609 100644
--- a/net/core/ptp_classifier.c
+++ b/net/core/ptp_classifier.c
@@ -52,14 +52,43 @@
* test_8021q:
* jneq #0x8100, test_ieee1588 ; ETH_P_8021Q ?
* ldh [16] ; load inner type
- * jneq #0x88f7, drop_ieee1588 ; ETH_P_1588 ?
+ * jneq #0x88f7, test_8021q_ipv4 ; ETH_P_1588 ?
* ldb [18] ; load payload
* and #0x8 ; as we don't have ports here, test
* jneq #0x0, drop_ieee1588 ; for PTP_GEN_BIT and drop these
* ldh [18] ; reload payload
* and #0xf ; mask PTP_CLASS_VMASK
- * or #0x40 ; PTP_CLASS_V2_VLAN
+ * or #0x70 ; PTP_CLASS_VLAN|PTP_CLASS_L2
+ * ret a ; return PTP class
+ *
+ * ; PTP over UDP over IPv4 over 802.1Q over Ethernet
+ * test_8021q_ipv4:
+ * jneq #0x800, test_8021q_ipv6 ; ETH_P_IP ?
+ * ldb [27] ; load proto
+ * jneq #17, drop_8021q_ipv4 ; IPPROTO_UDP ?
+ * ldh [24] ; load frag offset field
+ * jset #0x1fff, drop_8021q_ipv4; don't allow fragments
+ * ldxb 4*([18]&0xf) ; load IP header len
+ * ldh [x + 20] ; load UDP dst port
+ * jneq #319, drop_8021q_ipv4 ; is port PTP_EV_PORT ?
+ * ldh [x + 26] ; load payload
+ * and #0xf ; mask PTP_CLASS_VMASK
+ * or #0x50 ; PTP_CLASS_VLAN|PTP_CLASS_IPV4
+ * ret a ; return PTP class
+ * drop_8021q_ipv4: ret #0x0 ; PTP_CLASS_NONE
+ *
+ * ; PTP over UDP over IPv6 over 802.1Q over Ethernet
+ * test_8021q_ipv6:
+ * jneq #0x86dd, drop_8021q_ipv6 ; ETH_P_IPV6 ?
+ * ldb [24] ; load proto
+ * jneq #17, drop_8021q_ipv6 ; IPPROTO_UDP ?
+ * ldh [60] ; load UDP dst port
+ * jneq #319, drop_8021q_ipv6 ; is port PTP_EV_PORT ?
+ * ldh [66] ; load payload
+ * and #0xf ; mask PTP_CLASS_VMASK
+ * or #0x60 ; PTP_CLASS_VLAN|PTP_CLASS_IPV6
* ret a ; return PTP class
+ * drop_8021q_ipv6: ret #0x0 ; PTP_CLASS_NONE
*
* ; PTP over Ethernet
* test_ieee1588:
@@ -113,16 +142,39 @@ void __init ptp_classifier_init(void)
{ 0x44, 0, 0, 0x00000020 },
{ 0x16, 0, 0, 0x00000000 },
{ 0x06, 0, 0, 0x00000000 },
- { 0x15, 0, 9, 0x00008100 },
+ { 0x15, 0, 32, 0x00008100 },
{ 0x28, 0, 0, 0x00000010 },
- { 0x15, 0, 15, 0x000088f7 },
+ { 0x15, 0, 7, 0x000088f7 },
{ 0x30, 0, 0, 0x00000012 },
{ 0x54, 0, 0, 0x00000008 },
- { 0x15, 0, 12, 0x00000000 },
+ { 0x15, 0, 35, 0x00000000 },
{ 0x28, 0, 0, 0x00000012 },
{ 0x54, 0, 0, 0x0000000f },
- { 0x44, 0, 0, 0x00000040 },
+ { 0x44, 0, 0, 0x00000070 },
+ { 0x16, 0, 0, 0x00000000 },
+ { 0x15, 0, 12, 0x00000800 },
+ { 0x30, 0, 0, 0x0000001b },
+ { 0x15, 0, 9, 0x00000011 },
+ { 0x28, 0, 0, 0x00000018 },
+ { 0x45, 7, 0, 0x00001fff },
+ { 0xb1, 0, 0, 0x00000012 },
+ { 0x48, 0, 0, 0x00000014 },
+ { 0x15, 0, 4, 0x0000013f },
+ { 0x48, 0, 0, 0x0000001a },
+ { 0x54, 0, 0, 0x0000000f },
+ { 0x44, 0, 0, 0x00000050 },
+ { 0x16, 0, 0, 0x00000000 },
+ { 0x06, 0, 0, 0x00000000 },
+ { 0x15, 0, 8, 0x000086dd },
+ { 0x30, 0, 0, 0x00000018 },
+ { 0x15, 0, 6, 0x00000011 },
+ { 0x28, 0, 0, 0x0000003c },
+ { 0x15, 0, 4, 0x0000013f },
+ { 0x28, 0, 0, 0x00000042 },
+ { 0x54, 0, 0, 0x0000000f },
+ { 0x44, 0, 0, 0x00000060 },
{ 0x16, 0, 0, 0x00000000 },
+ { 0x06, 0, 0, 0x00000000 },
{ 0x15, 0, 7, 0x000088f7 },
{ 0x30, 0, 0, 0x0000000e },
{ 0x54, 0, 0, 0x00000008 },