#ifndef _PTP_CLASSIFY_H_
#define _PTP_CLASSIFY_H_
-#include <linux/if_ether.h>
-#include <linux/if_vlan.h>
#include <linux/ip.h>
-#include <linux/filter.h>
-#ifdef __KERNEL__
-#include <linux/in.h>
-#else
-#include <netinet/in.h>
-#endif
+#include <linux/skbuff.h>
#define PTP_CLASS_NONE 0x00 /* not a PTP event message */
#define PTP_CLASS_V1 0x01 /* protocol version 1 */
#define PTP_CLASS_PMASK 0xf0 /* mask for the packet type field */
#define PTP_CLASS_V1_IPV4 (PTP_CLASS_V1 | PTP_CLASS_IPV4)
-#define PTP_CLASS_V1_IPV6 (PTP_CLASS_V1 | PTP_CLASS_IPV6) /*probably DNE*/
+#define PTP_CLASS_V1_IPV6 (PTP_CLASS_V1 | PTP_CLASS_IPV6) /* probably DNE */
#define PTP_CLASS_V2_IPV4 (PTP_CLASS_V2 | PTP_CLASS_IPV4)
#define PTP_CLASS_V2_IPV6 (PTP_CLASS_V2 | PTP_CLASS_IPV6)
#define PTP_CLASS_V2_L2 (PTP_CLASS_V2 | PTP_CLASS_L2)
#define PTP_EV_PORT 319
#define PTP_GEN_BIT 0x08 /* indicates general message, if set in message type */
-#define OFF_ETYPE 12
-#define OFF_IHL 14
-#define OFF_FRAG 20
-#define OFF_PROTO4 23
-#define OFF_NEXT 6
-#define OFF_UDP_DST 2
-
#define OFF_PTP_SOURCE_UUID 22 /* PTPv1 only */
#define OFF_PTP_SEQUENCE_ID 30
#define OFF_PTP_CONTROL 32 /* PTPv1 only */
-#define IPV4_HLEN(data) (((struct iphdr *)(data + OFF_IHL))->ihl << 2)
-
+/* Below defines should actually be removed at some point in time. */
#define IP6_HLEN 40
#define UDP_HLEN 8
-
-#define RELOFF_DST4 (ETH_HLEN + OFF_UDP_DST)
-#define OFF_DST6 (ETH_HLEN + IP6_HLEN + OFF_UDP_DST)
+#define OFF_IHL 14
#define OFF_PTP6 (ETH_HLEN + IP6_HLEN + UDP_HLEN)
+#define IPV4_HLEN(data) (((struct iphdr *)(data + OFF_IHL))->ihl << 2)
-#define OP_AND (BPF_ALU | BPF_AND | BPF_K)
-#define OP_JEQ (BPF_JMP | BPF_JEQ | BPF_K)
-#define OP_JSET (BPF_JMP | BPF_JSET | BPF_K)
-#define OP_LDB (BPF_LD | BPF_B | BPF_ABS)
-#define OP_LDH (BPF_LD | BPF_H | BPF_ABS)
-#define OP_LDHI (BPF_LD | BPF_H | BPF_IND)
-#define OP_LDX (BPF_LDX | BPF_B | BPF_MSH)
-#define OP_OR (BPF_ALU | BPF_OR | BPF_K)
-#define OP_RETA (BPF_RET | BPF_A)
-#define OP_RETK (BPF_RET | BPF_K)
+#if defined(CONFIG_NET_PTP_CLASSIFY)
+/**
+ * ptp_classify_raw - classify a PTP packet
+ * @skb: buffer
+ *
+ * Runs a minimal BPF dissector to classify a network packet to
+ * determine the PTP class. In case the skb does not contain any
+ * PTP protocol data, PTP_CLASS_NONE will be returned, otherwise
+ * PTP_CLASS_V1_IPV{4,6}, PTP_CLASS_V2_IPV{4,6} or
+ * PTP_CLASS_V2_{L2,VLAN}, depending on the packet content.
+ */
+unsigned int ptp_classify_raw(const struct sk_buff *skb);
-static inline int ptp_filter_init(struct sock_filter *f, int len)
+void __init ptp_classifier_init(void);
+#else
+static inline void ptp_classifier_init(void)
{
- if (OP_LDH == f[0].code)
- return sk_chk_filter(f, len);
- else
- return 0;
}
-
-#define PTP_FILTER \
- {OP_LDH, 0, 0, OFF_ETYPE }, /* */ \
- {OP_JEQ, 0, 12, ETH_P_IP }, /* f goto L20 */ \
- {OP_LDB, 0, 0, OFF_PROTO4 }, /* */ \
- {OP_JEQ, 0, 9, IPPROTO_UDP }, /* f goto L10 */ \
- {OP_LDH, 0, 0, OFF_FRAG }, /* */ \
- {OP_JSET, 7, 0, 0x1fff }, /* t goto L11 */ \
- {OP_LDX, 0, 0, OFF_IHL }, /* */ \
- {OP_LDHI, 0, 0, RELOFF_DST4 }, /* */ \
- {OP_JEQ, 0, 4, PTP_EV_PORT }, /* f goto L12 */ \
- {OP_LDHI, 0, 0, ETH_HLEN + UDP_HLEN }, /* */ \
- {OP_AND, 0, 0, PTP_CLASS_VMASK }, /* */ \
- {OP_OR, 0, 0, PTP_CLASS_IPV4 }, /* */ \
- {OP_RETA, 0, 0, 0 }, /* */ \
-/*L1x*/ {OP_RETK, 0, 0, PTP_CLASS_NONE }, /* */ \
-/*L20*/ {OP_JEQ, 0, 9, ETH_P_IPV6 }, /* f goto L40 */ \
- {OP_LDB, 0, 0, ETH_HLEN + OFF_NEXT }, /* */ \
- {OP_JEQ, 0, 6, IPPROTO_UDP }, /* f goto L30 */ \
- {OP_LDH, 0, 0, OFF_DST6 }, /* */ \
- {OP_JEQ, 0, 4, PTP_EV_PORT }, /* f goto L31 */ \
- {OP_LDH, 0, 0, OFF_PTP6 }, /* */ \
- {OP_AND, 0, 0, PTP_CLASS_VMASK }, /* */ \
- {OP_OR, 0, 0, PTP_CLASS_IPV6 }, /* */ \
- {OP_RETA, 0, 0, 0 }, /* */ \
-/*L3x*/ {OP_RETK, 0, 0, PTP_CLASS_NONE }, /* */ \
-/*L40*/ {OP_JEQ, 0, 9, ETH_P_8021Q }, /* f goto L50 */ \
- {OP_LDH, 0, 0, OFF_ETYPE + 4 }, /* */ \
- {OP_JEQ, 0, 15, ETH_P_1588 }, /* f goto L60 */ \
- {OP_LDB, 0, 0, ETH_HLEN + VLAN_HLEN }, /* */ \
- {OP_AND, 0, 0, PTP_GEN_BIT }, /* */ \
- {OP_JEQ, 0, 12, 0 }, /* f goto L6x */ \
- {OP_LDH, 0, 0, ETH_HLEN + VLAN_HLEN }, /* */ \
- {OP_AND, 0, 0, PTP_CLASS_VMASK }, /* */ \
- {OP_OR, 0, 0, PTP_CLASS_VLAN }, /* */ \
- {OP_RETA, 0, 0, 0 }, /* */ \
-/*L50*/ {OP_JEQ, 0, 7, ETH_P_1588 }, /* f goto L61 */ \
- {OP_LDB, 0, 0, ETH_HLEN }, /* */ \
- {OP_AND, 0, 0, PTP_GEN_BIT }, /* */ \
- {OP_JEQ, 0, 4, 0 }, /* f goto L6x */ \
- {OP_LDH, 0, 0, ETH_HLEN }, /* */ \
- {OP_AND, 0, 0, PTP_CLASS_VMASK }, /* */ \
- {OP_OR, 0, 0, PTP_CLASS_L2 }, /* */ \
- {OP_RETA, 0, 0, 0 }, /* */ \
-/*L6x*/ {OP_RETK, 0, 0, PTP_CLASS_NONE },
-
#endif
+#endif /* _PTP_CLASSIFY_H_ */
projects / karo-tx-linux.git / blobdiff