Handle DLT_PFLOG on all OSes.

Don't pad the pflog header with BPF_WORDALIGN(); round up to a multiple
of 4, instead, as that's what all but FreeBSD do, and FreeBSD used to do
that and should go back to doing so (kern/261566).

Don't rely on the OS's pflog include files to define direction types,
reason types, action types, or the layout of the header; instead, define
them ourselves in a header of our own, with #ifs to select the ones that
are only on some platforms.  That way, it'll handle some fields and
field values (the ones common to all OSes with pflog) on all OSes, even
ones without pflog.

That also expands the set of direction, reason, and action codes to what
various *BSDs and Darwin support.

Also, handle all the different AF_INET6 values in various *BSDs and
Darwin.

1 files changed, 157 insertions, 0 deletions

diff --git a/pflog.h b/pflog.h
new file mode 100644
index 00000000..0d3f899b
--- /dev/null
+++ b/pflog.h
@@ -0,0 +1,157 @@
+/*
+ * Copyright (c) 1982, 1986, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * pflog headers, at least as they exist now.
+ */
+#define PFLOG_IFNAMSIZ		16
+#define PFLOG_RULESET_NAME_SIZE	16
+
+/*
+ * Direction values.
+ */
+#define PF_INOUT	0
+#define PF_IN		1
+#define PF_OUT		2
+#if defined(__OpenBSD__)
+#define PF_FWD		3
+#endif
+
+/*
+ * Reason values.
+ */
+#define PFRES_MATCH	0
+#define PFRES_BADOFF	1
+#define PFRES_FRAG	2
+#define PFRES_SHORT	3
+#define PFRES_NORM	4
+#define PFRES_MEMORY	5
+#define PFRES_TS	6
+#define PFRES_CONGEST	7
+#define PFRES_IPOPTIONS 8
+#define PFRES_PROTCKSUM 9
+#define PFRES_BADSTATE	10
+#define PFRES_STATEINS	11
+#define PFRES_MAXSTATES	12
+#define PFRES_SRCLIMIT	13
+#define PFRES_SYNPROXY	14
+#if defined(__FreeBSD__)
+#define PFRES_MAPFAILED	15
+#elif defined(__NetBSD__)
+#define PFRES_STATELOCKED 15
+#elif defined(__OpenBSD__)
+#define PFRES_TRANSLATE	15
+#define PFRES_NOROUTE	16
+#elif defined(__APPLE__)
+#define PFRES_DUMMYNET  15
+#endif
+
+/*
+ * Action vaues.
+ */
+#define PF_PASS			0
+#define PF_DROP			1
+#define PF_SCRUB		2
+#define PF_NOSCRUB		3
+#define PF_NAT			4
+#define PF_NONAT		5
+#define PF_BINAT		6
+#define PF_NOBINAT		7
+#define PF_RDR			8
+#define PF_NORDR		9
+#define PF_SYNPROXY_DROP	10
+#if defined(__FreeBSD__)
+#define PF_DEFER		11
+#elif defined(__OpenBSD__)
+#define PF_DEFER		11
+#define PF_MATCH		12
+#define PF_DIVERT		13
+#define PF_RT			14
+#define PF_AFRT			15
+#elif defined(__APPLE__)
+#define PF_DUMMYNET		11
+#define PF_NODUMMYNET		12
+#define PF_NAT64		13
+#define PF_NONAT64		14
+#endif
+
+struct pf_addr {
+	union {
+		struct in_addr		v4;
+		struct in6_addr		v6;
+		uint8_t			addr8[16];
+		uint16_t		addr16[8];
+		uint32_t		addr32[4];
+	} pfa;		    /* 128-bit address */
+#define v4	pfa.v4
+#define v6	pfa.v6
+#define addr8	pfa.addr8
+#define addr16	pfa.addr16
+#define addr32	pfa.addr32
+};
+
+struct pfloghdr {
+	uint8_t		length;
+	uint8_t		af;
+	uint8_t		action;
+	uint8_t		reason;
+	char		ifname[PFLOG_IFNAMSIZ];
+	char		ruleset[PFLOG_RULESET_NAME_SIZE];
+	uint32_t	rulenr;
+	uint32_t	subrulenr;
+	uint32_t	uid;
+	int32_t		pid;
+	uint32_t	rule_uid;
+	int32_t		rule_pid;
+	uint8_t		dir;
+#if defined(__OpenBSD__)
+	uint8_t		rewritten;
+	uint8_t		naf;
+	uint8_t		pad[1];
+#else
+	uint8_t		pad[3];
+#endif
+#if defined(__FreeBSD__)
+	uint32_t	ridentifier;
+	uint8_t		reserve;
+	uint8_t		pad2[3];
+#elif defined(__OpenBSD__)
+	struct pf_addr	saddr;
+	struct pf_addr	daddr;
+	uint16_t	sport;
+	uint16_t	dport;
+#endif
+};
+
+
+