files added for packet filter expression compilation

[ppp.git] / pppd / gencode.h

diff --git a/pppd/gencode.h b/pppd/gencode.h
new file mode 100644 (file)
index 0000000..72d4cc3
--- /dev/null
+++ b/pppd/gencode.h
@@ -0,0 +1,165 @@
+/*     From NetBSD: gencode.h,v 1.2 1995/03/06 11:38:24 mycroft Exp */
+
+/*
+ * Copyright (c) 1990, 1991, 1992, 1993, 1994
+ *     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: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * @(#) Header: gencode.h,v 1.20 94/06/12 14:29:30 leres Exp (LBL)
+ */
+
+/* $Id: gencode.h,v 1.1 1996/04/04 04:22:26 paulus Exp $ */
+
+/* Address qualifers. */
+
+#define Q_HOST         1
+#define Q_NET          2
+#define Q_PORT         3
+#define Q_PROTO                4
+
+/* Protocol qualifiers. */
+
+#define Q_LINK         1
+#define Q_IP           2
+#define Q_TCP          3
+#define Q_UDP          4
+#define Q_ICMP         5
+
+/* Directional qualifers. */
+
+#define Q_SRC          1
+#define Q_DST          2
+#define Q_OR           3
+#define Q_AND          4
+
+#define Q_DEFAULT      0
+#define Q_UNDEF                255
+
+struct stmt {
+       int code;
+       long k;
+};
+
+struct slist {
+       struct stmt s;
+       struct slist *next;
+};
+
+/* 
+ * A bit vector to represent definition sets.  We assume TOT_REGISTERS
+ * is smaller than 8*sizeof(atomset).
+ */
+typedef unsigned long atomset;
+#define ATOMMASK(n) (1 << (n))
+#define ATOMELEM(d, n) (d & ATOMMASK(n))
+
+/*
+ * An unbounded set.
+ */
+typedef unsigned long *uset;
+
+/*
+ * Total number of atomic entities, including accumulator (A) and index (X).
+ * We treat all these guys similarly during flow analysis.
+ */
+#define N_ATOMS (BPF_MEMWORDS+2)
+
+struct edge {
+       int id;
+       int code;
+       uset edom;
+       struct block *succ;
+       struct block *pred;
+       struct edge *next;      /* link list of incoming edges for a node */
+};
+
+struct block {
+       int id;
+       struct slist *stmts;    /* side effect stmts */
+       struct stmt s;          /* branch stmt */
+       int mark;
+       int level;
+       int offset;
+       int sense;
+       struct edge et;
+       struct edge ef;
+       struct block *head;
+       struct block *link;     /* link field used by optimizer */
+       uset dom;
+       uset closure;
+       struct edge *in_edges;
+       atomset def, kill;
+       atomset in_use;
+       atomset out_use;
+       long oval;
+       long val[N_ATOMS];
+};
+
+struct arth {
+       struct block *b;        /* protocol checks */
+       struct slist *s;        /* stmt list */
+       int regno;              /* virtual register number of result */
+};
+
+struct qual {
+       unsigned char addr;
+       unsigned char proto;
+       unsigned char dir;
+       unsigned char pad;
+};
+
+#ifndef __GNUC__
+#define volatile
+#endif
+
+struct arth *gen_loadi __P((int));
+struct arth *gen_load __P((int, struct arth *, int));
+struct arth *gen_loadlen __P((void));
+struct arth *gen_neg __P((struct arth *));
+struct arth *gen_arth __P((int, struct arth *, struct arth *));
+
+void gen_and __P((struct block *, struct block *));
+void gen_or __P((struct block *, struct block *));
+void gen_not __P((struct block *));
+
+struct block *gen_scode __P((char *, struct qual));
+struct block *gen_ecode __P((unsigned char *, struct qual));
+struct block *gen_ncode __P((unsigned long, struct qual));
+struct block *gen_proto_abbrev __P((int));
+struct block *gen_relation __P((int, struct arth *, struct arth *, int));
+struct block *gen_less __P((int));
+struct block *gen_greater __P((int));
+struct block *gen_byteop __P((int, int, int));
+struct block *gen_broadcast __P((int));
+struct block *gen_multicast __P((int));
+struct block *gen_inbound __P((int));
+
+void bpf_optimize __P((struct block **));
+volatile void bpf_error __P((char *, ...));
+
+void finish_parse __P((struct block *));
+char *sdup __P((char *));
+
+struct bpf_insn *icode_to_fcode __P((struct block *, int *));
+int pcap_parse __P((void));
+void lex_init __P((char *));
+void sappend __P((struct slist *, struct slist *));
+
+/* XXX */
+#define JT(b)  ((b)->et.succ)
+#define JF(b)  ((b)->ef.succ)