Revert r288682

I meant to do this on ^/user/ngie/more-tests

Pointyhat to: ngie (use svn info next time...)

1 files changed, 1374 insertions, 0 deletions

diff --git a/contrib/ipfilter/tools/ipfcomp.c b/contrib/ipfilter/tools/ipfcomp.c
new file mode 100644
index 0000000..eba28ce
--- /dev/null
+++ b/contrib/ipfilter/tools/ipfcomp.c
@@ -0,0 +1,1374 @@
+/*	$FreeBSD$	*/
+
+/*
+ * Copyright (C) 2012 by Darren Reed.
+ *
+ * See the IPFILTER.LICENCE file for details on licencing.
+ */
+#if !defined(lint)
+static const char sccsid[] = "@(#)ip_fil.c	2.41 6/5/96 (C) 1993-2000 Darren Reed";
+static const char rcsid[] = "@(#)$Id$";
+#endif
+
+#include "ipf.h"
+
+
+typedef struct {
+	int c;
+	int e;
+	int n;
+	int p;
+	int s;
+} mc_t;
+
+
+static char *portcmp[] = { "*", "==", "!=", "<", ">", "<=", ">=", "**", "***" };
+static int count = 0;
+
+int intcmp __P((const void *, const void *));
+static void indent __P((FILE *, int));
+static void printeq __P((FILE *, char *, int, int, int));
+static void printipeq __P((FILE *, char *, int, int, int));
+static void addrule __P((FILE *, frentry_t *));
+static void printhooks __P((FILE *, int, int, frgroup_t *));
+static void emitheader __P((frgroup_t *, u_int, u_int));
+static void emitGroup __P((int, int, void *, frentry_t *, char *,
+			   u_int, u_int));
+static void emittail __P((void));
+static void printCgroup __P((int, frentry_t *, mc_t *, char *));
+
+#define	FRC_IFN	0
+#define	FRC_V	1
+#define	FRC_P	2
+#define	FRC_FL	3
+#define	FRC_TOS	4
+#define	FRC_TTL	5
+#define	FRC_SRC	6
+#define	FRC_DST	7
+#define	FRC_TCP	8
+#define	FRC_SP	9
+#define	FRC_DP	10
+#define	FRC_OPT	11
+#define	FRC_SEC	12
+#define	FRC_ATH	13
+#define	FRC_ICT	14
+#define	FRC_ICC	15
+#define	FRC_MAX	16
+
+
+static	FILE	*cfile = NULL;
+
+/*
+ * This is called once per filter rule being loaded to emit data structures
+ * required.
+ */
+void printc(fr)
+	frentry_t *fr;
+{
+	fripf_t *ipf;
+	u_long *ulp;
+	char *and;
+	FILE *fp;
+	int i;
+
+	if (fr->fr_family == 6)
+		return;
+	if ((fr->fr_type != FR_T_IPF) && (fr->fr_type != FR_T_NONE))
+		return;
+	if ((fr->fr_type == FR_T_IPF) &&
+	    ((fr->fr_datype != FRI_NORMAL) || (fr->fr_satype != FRI_NORMAL)))
+		return;
+	ipf = fr->fr_ipf;
+
+	if (cfile == NULL)
+		cfile = fopen("ip_rules.c", "w");
+	if (cfile == NULL)
+		return;
+	fp = cfile;
+	if (count == 0) {
+		fprintf(fp, "/*\n");
+ 		fprintf(fp, "* Copyright (C) 2012 by Darren Reed.\n");
+ 		fprintf(fp, "*\n");
+ 		fprintf(fp, "* Redistribution and use in source and binary forms are permitted\n");
+ 		fprintf(fp, "* provided that this notice is preserved and due credit is given\n");
+ 		fprintf(fp, "* to the original author and the contributors.\n");
+ 		fprintf(fp, "*/\n\n");
+
+		fprintf(fp, "#include <sys/param.h>\n");
+		fprintf(fp, "#include <sys/types.h>\n");
+		fprintf(fp, "#include <sys/time.h>\n");
+		fprintf(fp, "#include <sys/socket.h>\n");
+		fprintf(fp, "#if (__FreeBSD_version >= 40000)\n");
+		fprintf(fp, "# if defined(_KERNEL)\n");
+		fprintf(fp, "#  include <sys/libkern.h>\n");
+		fprintf(fp, "# else\n");
+		fprintf(fp, "#  include <sys/unistd.h>\n");
+		fprintf(fp, "# endif\n");
+		fprintf(fp, "#endif\n");
+		fprintf(fp, "#if (__NetBSD_Version__ >= 399000000)\n");
+		fprintf(fp, "#else\n");
+		fprintf(fp, "# if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__sgi)\n");
+		fprintf(fp, "#  include <sys/systm.h>\n");
+		fprintf(fp, "# endif\n");
+		fprintf(fp, "#endif\n");
+		fprintf(fp, "#include <sys/errno.h>\n");
+		fprintf(fp, "#include <sys/param.h>\n");
+		fprintf(fp,
+"#if !defined(__SVR4) && !defined(__svr4__) && !defined(__hpux)\n");
+		fprintf(fp, "# include <sys/mbuf.h>\n");
+		fprintf(fp, "#endif\n");
+		fprintf(fp,
+"#if defined(__FreeBSD__) && (__FreeBSD_version > 220000)\n");
+		fprintf(fp, "# include <sys/sockio.h>\n");
+		fprintf(fp, "#else\n");
+		fprintf(fp, "# include <sys/ioctl.h>\n");
+		fprintf(fp, "#endif /* FreeBSD */\n");
+		fprintf(fp, "#include <net/if.h>\n");
+		fprintf(fp, "#include <netinet/in.h>\n");
+		fprintf(fp, "#include <netinet/in_systm.h>\n");
+		fprintf(fp, "#include <netinet/ip.h>\n");
+		fprintf(fp, "#include <netinet/tcp.h>\n");
+		fprintf(fp, "#include \"netinet/ip_compat.h\"\n");
+		fprintf(fp, "#include \"netinet/ip_fil.h\"\n\n");
+		fprintf(fp, "#include \"netinet/ip_rules.h\"\n\n");
+		fprintf(fp, "#ifndef _KERNEL\n");
+		fprintf(fp, "# include <string.h>\n");
+		fprintf(fp, "#endif /* _KERNEL */\n");
+		fprintf(fp, "\n");
+		fprintf(fp, "#ifdef IPFILTER_COMPILED\n");
+		fprintf(fp, "\n");
+		fprintf(fp, "extern ipf_main_softc_t ipfmain;\n");
+		fprintf(fp, "\n");
+	}
+
+	addrule(fp, fr);
+	fr->fr_type |= FR_T_BUILTIN;
+	and = "";
+	fr->fr_ref = 1;
+	i = sizeof(*fr);
+	if (i & -(1 - sizeof(*ulp)))
+		i += sizeof(u_long);
+	for (i /= sizeof(u_long), ulp = (u_long *)fr; i > 0; i--) {
+		fprintf(fp, "%s%#lx", and, *ulp++);
+		and = ", ";
+	}
+	fprintf(fp, "\n};\n");
+	fr->fr_type &= ~FR_T_BUILTIN;
+
+	count++;
+
+	fflush(fp);
+}
+
+
+static frgroup_t *groups = NULL;
+
+
+static void addrule(fp, fr)
+	FILE *fp;
+	frentry_t *fr;
+{
+	frentry_t *f, **fpp;
+	frgroup_t *g;
+	u_long *ulp;
+	char *ghead;
+	char *gname;
+	char *and;
+	int i;
+
+	f = (frentry_t *)malloc(sizeof(*f));
+	bcopy((char *)fr, (char *)f, sizeof(*fr));
+	if (fr->fr_ipf) {
+		f->fr_ipf = (fripf_t *)malloc(sizeof(*f->fr_ipf));
+		bcopy((char *)fr->fr_ipf, (char *)f->fr_ipf,
+		      sizeof(*fr->fr_ipf));
+	}
+
+	f->fr_next = NULL;
+	gname = FR_NAME(fr, fr_group);
+
+	for (g = groups; g != NULL; g = g->fg_next)
+		if ((strncmp(g->fg_name, gname, FR_GROUPLEN) == 0) &&
+		    (g->fg_flags == (f->fr_flags & FR_INOUT)))
+			break;
+
+	if (g == NULL) {
+		g = (frgroup_t *)calloc(1, sizeof(*g));
+		g->fg_next = groups;
+		groups = g;
+		g->fg_head = f;
+		strncpy(g->fg_name, gname, FR_GROUPLEN);
+		g->fg_ref = 0;
+		g->fg_flags = f->fr_flags & FR_INOUT;
+	}
+
+	for (fpp = &g->fg_start; *fpp != NULL; )
+		fpp = &((*fpp)->fr_next);
+	*fpp = f;
+
+	if (fr->fr_dsize > 0) {
+		fprintf(fp, "\
+static u_long ipf%s_rule_data_%s_%u[] = {\n",
+			f->fr_flags & FR_INQUE ? "in" : "out",
+			g->fg_name, g->fg_ref);
+		and = "";
+		i = fr->fr_dsize;
+		ulp = fr->fr_data;
+		for (i /= sizeof(u_long); i > 0; i--) {
+			fprintf(fp, "%s%#lx", and, *ulp++);
+			and = ", ";
+		}
+		fprintf(fp, "\n};\n");
+	}
+
+	fprintf(fp, "\nstatic u_long %s_rule_%s_%d[] = {\n",
+		f->fr_flags & FR_INQUE ? "in" : "out", g->fg_name, g->fg_ref);
+
+	g->fg_ref++;
+
+	if (f->fr_grhead != -1) {
+		ghead = FR_NAME(f, fr_grhead);
+		for (g = groups; g != NULL; g = g->fg_next)
+			if ((strncmp(g->fg_name, ghead, FR_GROUPLEN) == 0) &&
+			    g->fg_flags == (f->fr_flags & FR_INOUT))
+				break;
+		if (g == NULL) {
+			g = (frgroup_t *)calloc(1, sizeof(*g));
+			g->fg_next = groups;
+			groups = g;
+			g->fg_head = f;
+			strncpy(g->fg_name, ghead, FR_GROUPLEN);
+			g->fg_ref = 0;
+			g->fg_flags = f->fr_flags & FR_INOUT;
+		}
+	}
+}
+
+
+int intcmp(c1, c2)
+	const void *c1, *c2;
+{
+	const mc_t *i1 = (const mc_t *)c1, *i2 = (const mc_t *)c2;
+
+	if (i1->n == i2->n) {
+		return i1->c - i2->c;
+	}
+	return i2->n - i1->n;
+}
+
+
+static void indent(fp, in)
+	FILE *fp;
+	int in;
+{
+	for (; in; in--)
+		fputc('\t', fp);
+}
+
+static void printeq(fp, var, m, max, v)
+	FILE *fp;
+	char *var;
+	int m, max, v;
+{
+	if (m == max)
+		fprintf(fp, "%s == %#x) {\n", var, v);
+	else
+		fprintf(fp, "(%s & %#x) == %#x) {\n", var, m, v);
+}
+
+/*
+ * Parameters: var - IP# being compared
+ *             fl - 0 for positive match, 1 for negative match
+ *             m - netmask
+ *             v - required address
+ */
+static void printipeq(fp, var, fl, m, v)
+	FILE *fp;
+	char *var;
+	int fl, m, v;
+{
+	if (m == 0xffffffff)
+		fprintf(fp, "%s ", var);
+	else
+		fprintf(fp, "(%s & %#x) ", var, m);
+	fprintf(fp, "%c", fl ? '!' : '=');
+	fprintf(fp, "= %#x) {\n", v);
+}
+
+
+void emit(num, dir, v, fr)
+	int num, dir;
+	void *v;
+	frentry_t *fr;
+{
+	u_int incnt, outcnt;
+	frgroup_t *g;
+	frentry_t *f;
+
+	for (g = groups; g != NULL; g = g->fg_next) {
+		if (dir == 0 || dir == -1) {
+			if ((g->fg_flags & FR_INQUE) == 0)
+				continue;
+			for (incnt = 0, f = g->fg_start; f != NULL;
+			     f = f->fr_next)
+				incnt++;
+			emitGroup(num, dir, v, fr, g->fg_name, incnt, 0);
+		}
+		if (dir == 1 || dir == -1) {
+			if ((g->fg_flags & FR_OUTQUE) == 0)
+				continue;
+			for (outcnt = 0, f = g->fg_start; f != NULL;
+			     f = f->fr_next)
+				outcnt++;
+			emitGroup(num, dir, v, fr, g->fg_name, 0, outcnt);
+		}
+	}
+
+	if (num == -1 && dir == -1) {
+		for (g = groups; g != NULL; g = g->fg_next) {
+			if ((g->fg_flags & FR_INQUE) != 0) {
+				for (incnt = 0, f = g->fg_start; f != NULL;
+				     f = f->fr_next)
+					incnt++;
+				if (incnt > 0)
+					emitheader(g, incnt, 0);
+			}
+			if ((g->fg_flags & FR_OUTQUE) != 0) {
+				for (outcnt = 0, f = g->fg_start; f != NULL;
+				     f = f->fr_next)
+					outcnt++;
+				if (outcnt > 0)
+					emitheader(g, 0, outcnt);
+			}
+		}
+		emittail();
+		fprintf(cfile, "#endif /* IPFILTER_COMPILED */\n");
+	}
+
+}
+
+
+static void emitheader(grp, incount, outcount)
+	frgroup_t *grp;
+	u_int incount, outcount;
+{
+	static FILE *fph = NULL;
+	frgroup_t *g;
+
+	if (fph == NULL) {
+		fph = fopen("ip_rules.h", "w");
+		if (fph == NULL)
+			return;
+
+		fprintf(fph, "extern int ipfrule_add __P((void));\n");
+		fprintf(fph, "extern int ipfrule_remove __P((void));\n");
+	}
+
+	printhooks(cfile, incount, outcount, grp);
+
+	if (incount) {
+		fprintf(fph, "\n\
+extern frentry_t *ipfrule_match_in_%s __P((fr_info_t *, u_32_t *));\n\
+extern frentry_t *ipf_rules_in_%s[%d];\n",
+			grp->fg_name, grp->fg_name, incount);
+
+		for (g = groups; g != grp; g = g->fg_next)
+			if ((strncmp(g->fg_name, grp->fg_name,
+				     FR_GROUPLEN) == 0) &&
+			    g->fg_flags == grp->fg_flags)
+				break;
+		if (g == grp) {
+			fprintf(fph, "\n\
+extern int ipfrule_add_in_%s __P((void));\n\
+extern int ipfrule_remove_in_%s __P((void));\n", grp->fg_name, grp->fg_name);
+		}
+	}
+	if (outcount) {
+		fprintf(fph, "\n\
+extern frentry_t *ipfrule_match_out_%s __P((fr_info_t *, u_32_t *));\n\
+extern frentry_t *ipf_rules_out_%s[%d];\n",
+			grp->fg_name, grp->fg_name, outcount);
+
+		for (g = groups; g != grp; g = g->fg_next)
+			if ((strncmp(g->fg_name, grp->fg_name,
+				     FR_GROUPLEN) == 0) &&
+			    g->fg_flags == grp->fg_flags)
+				break;
+		if (g == grp) {
+			fprintf(fph, "\n\
+extern int ipfrule_add_out_%s __P((void));\n\
+extern int ipfrule_remove_out_%s __P((void));\n",
+				grp->fg_name, grp->fg_name);
+		}
+	}
+}
+
+static void emittail()
+{
+	frgroup_t *g;
+
+	fprintf(cfile, "\n\
+int ipfrule_add()\n\
+{\n\
+	int err;\n\
+\n");
+	for (g = groups; g != NULL; g = g->fg_next)
+		fprintf(cfile, "\
+	err = ipfrule_add_%s_%s();\n\
+	if (err != 0)\n\
+		return err;\n",
+			(g->fg_flags & FR_INQUE) ? "in" : "out", g->fg_name);
+	fprintf(cfile, "\
+	return 0;\n");
+	fprintf(cfile, "}\n\
+\n");
+
+	fprintf(cfile, "\n\
+int ipfrule_remove()\n\
+{\n\
+	int err;\n\
+\n");
+	for (g = groups; g != NULL; g = g->fg_next)
+		fprintf(cfile, "\
+	err = ipfrule_remove_%s_%s();\n\
+	if (err != 0)\n\
+		return err;\n",
+			(g->fg_flags & FR_INQUE) ? "in" : "out", g->fg_name);
+	fprintf(cfile, "\
+	return 0;\n");
+	fprintf(cfile, "}\n");
+}
+
+
+static void emitGroup(num, dir, v, fr, group, incount, outcount)
+	int num, dir;
+	void *v;
+	frentry_t *fr;
+	char *group;
+	u_int incount, outcount;
+{
+	static FILE *fp = NULL;
+	static int header[2] = { 0, 0 };
+	static char egroup[FR_GROUPLEN] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
+	static int openfunc = 0;
+	static mc_t *n = NULL;
+	static int sin = 0;
+	frentry_t *f;
+	frgroup_t *g;
+	fripf_t *ipf;
+	int i, in, j;
+	mc_t *m = v;
+
+	if (fp == NULL)
+		fp = cfile;
+	if (fp == NULL)
+		return;
+	if (strncmp(egroup, group, FR_GROUPLEN)) {
+		for (sin--; sin > 0; sin--) {
+			indent(fp, sin);
+			fprintf(fp, "}\n");
+		}
+		if (openfunc == 1) {
+			fprintf(fp, "\treturn fr;\n}\n");
+			openfunc = 0;
+			if (n != NULL) {
+				free(n);
+				n = NULL;
+			}
+		}
+		sin = 0;
+		header[0] = 0;
+		header[1] = 0;
+		strncpy(egroup, group, FR_GROUPLEN);
+	} else if (openfunc == 1 && num < 0) {
+		if (n != NULL) {
+			free(n);
+			n = NULL;
+		}
+		for (sin--; sin > 0; sin--) {
+			indent(fp, sin);
+			fprintf(fp, "}\n");
+		}
+		if (openfunc == 1) {
+			fprintf(fp, "\treturn fr;\n}\n");
+			openfunc = 0;
+		}
+	}
+
+	if (dir == -1)
+		return;
+
+	for (g = groups; g != NULL; g = g->fg_next) {
+		if (dir == 0 && (g->fg_flags & FR_INQUE) == 0)
+			continue;
+		else if (dir == 1 && (g->fg_flags & FR_OUTQUE) == 0)
+			continue;
+		if (strncmp(g->fg_name, group, FR_GROUPLEN) != 0)
+			continue;
+		break;
+	}
+
+	/*
+	 * Output the array of pointers to rules for this group.
+	 */
+	if (g != NULL && num == -2 && dir == 0 && header[0] == 0 &&
+	    incount != 0) {
+		fprintf(fp, "\nfrentry_t *ipf_rules_in_%s[%d] = {",
+			group, incount);
+		for (f = g->fg_start, i = 0; f != NULL; f = f->fr_next) {
+			if ((f->fr_flags & FR_INQUE) == 0)
+				continue;
+			if ((i & 1) == 0) {
+				fprintf(fp, "\n\t");
+			}
+			fprintf(fp, "(frentry_t *)&in_rule_%s_%d",
+				FR_NAME(f, fr_group), i);
+			if (i + 1 < incount)
+				fprintf(fp, ", ");
+			i++;
+		}
+		fprintf(fp, "\n};\n");
+	}
+
+	if (g != NULL && num == -2 && dir == 1 && header[0] == 0 &&
+	    outcount != 0) {
+		fprintf(fp, "\nfrentry_t *ipf_rules_out_%s[%d] = {",
+			group, outcount);
+		for (f = g->fg_start, i = 0; f != NULL; f = f->fr_next) {
+			if ((f->fr_flags & FR_OUTQUE) == 0)
+				continue;
+			if ((i & 1) == 0) {
+				fprintf(fp, "\n\t");
+			}
+			fprintf(fp, "(frentry_t *)&out_rule_%s_%d",
+				FR_NAME(f, fr_group), i);
+			if (i + 1 < outcount)
+				fprintf(fp, ", ");
+			i++;
+		}
+		fprintf(fp, "\n};\n");
+		fp = NULL;
+	}
+
+	if (num < 0)
+		return;
+
+	in = 0;
+	ipf = fr->fr_ipf;
+
+	/*
+	 * If the function header has not been printed then print it now.
+	 */
+	if (g != NULL && header[dir] == 0) {
+		int pdst = 0, psrc = 0;
+
+		openfunc = 1;
+		fprintf(fp, "\nfrentry_t *ipfrule_match_%s_%s(fin, passp)\n",
+			(dir == 0) ? "in" : "out", group);
+		fprintf(fp, "fr_info_t *fin;\n");
+		fprintf(fp, "u_32_t *passp;\n");
+		fprintf(fp, "{\n");
+		fprintf(fp, "\tfrentry_t *fr = NULL;\n");
+
+		/*
+		 * Print out any variables that need to be declared.
+		 */
+		for (f = g->fg_start, i = 0; f != NULL; f = f->fr_next) {
+			if (incount + outcount > m[FRC_SRC].e + 1)
+				psrc = 1;
+			if (incount + outcount > m[FRC_DST].e + 1)
+				pdst = 1;
+		}
+		if (psrc == 1)
+			fprintf(fp, "\tu_32_t src = ntohl(%s);\n",
+				"fin->fin_fi.fi_saddr");
+		if (pdst == 1)
+			fprintf(fp, "\tu_32_t dst = ntohl(%s);\n",
+				"fin->fin_fi.fi_daddr");
+	}
+
+	for (i = 0; i < FRC_MAX; i++) {
+		switch(m[i].c)
+		{
+		case FRC_IFN :
+			if (fr->fr_ifnames[0] != -1)
+				m[i].s = 1;
+			break;
+		case FRC_V :
+			if (ipf != NULL && ipf->fri_mip.fi_v != 0)
+				m[i].s = 1;
+			break;
+		case FRC_FL :
+			if (ipf != NULL && ipf->fri_mip.fi_flx != 0)
+				m[i].s = 1;
+			break;
+		case FRC_P :
+			if (ipf != NULL && ipf->fri_mip.fi_p != 0)
+				m[i].s = 1;
+			break;
+		case FRC_TTL :
+			if (ipf != NULL && ipf->fri_mip.fi_ttl != 0)
+				m[i].s = 1;
+			break;
+		case FRC_TOS :
+			if (ipf != NULL && ipf->fri_mip.fi_tos != 0)
+				m[i].s = 1;
+			break;
+		case FRC_TCP :
+			if (ipf == NULL)
+				break;
+			if ((ipf->fri_ip.fi_p == IPPROTO_TCP) &&
+			    fr->fr_tcpfm != 0)
+				m[i].s = 1;
+			break;
+		case FRC_SP :
+			if (ipf == NULL)
+				break;
+			if (fr->fr_scmp == FR_INRANGE)
+				m[i].s = 1;
+			else if (fr->fr_scmp == FR_OUTRANGE)
+				m[i].s = 1;
+			else if (fr->fr_scmp != 0)
+				m[i].s = 1;
+			break;
+		case FRC_DP :
+			if (ipf == NULL)
+				break;
+			if (fr->fr_dcmp == FR_INRANGE)
+				m[i].s = 1;
+			else if (fr->fr_dcmp == FR_OUTRANGE)
+				m[i].s = 1;
+			else if (fr->fr_dcmp != 0)
+				m[i].s = 1;
+			break;
+		case FRC_SRC :
+			if (ipf == NULL)
+				break;
+			if (fr->fr_satype == FRI_LOOKUP) {
+				;
+			} else if ((fr->fr_smask != 0) ||
+				   (fr->fr_flags & FR_NOTSRCIP) != 0)
+				m[i].s = 1;
+			break;
+		case FRC_DST :
+			if (ipf == NULL)
+				break;
+			if (fr->fr_datype == FRI_LOOKUP) {
+				;
+			} else if ((fr->fr_dmask != 0) ||
+				   (fr->fr_flags & FR_NOTDSTIP) != 0)
+				m[i].s = 1;
+			break;
+		case FRC_OPT :
+			if (ipf == NULL)
+				break;
+			if (fr->fr_optmask != 0)
+				m[i].s = 1;
+			break;
+		case FRC_SEC :
+			if (ipf == NULL)
+				break;
+			if (fr->fr_secmask != 0)
+				m[i].s = 1;
+			break;
+		case FRC_ATH :
+			if (ipf == NULL)
+				break;
+			if (fr->fr_authmask != 0)
+				m[i].s = 1;
+			break;
+		case FRC_ICT :
+			if (ipf == NULL)
+				break;
+			if ((fr->fr_icmpm & 0xff00) != 0)
+				m[i].s = 1;
+			break;
+		case FRC_ICC :
+			if (ipf == NULL)
+				break;
+			if ((fr->fr_icmpm & 0xff) != 0)
+				m[i].s = 1;
+			break;
+		}
+	}
+
+	if (!header[dir]) {
+		fprintf(fp, "\n");
+		header[dir] = 1;
+		sin = 0;
+	}
+
+	qsort(m, FRC_MAX, sizeof(mc_t), intcmp);
+
+	if (n) {
+		/*
+		 * Calculate the indentation interval upto the last common
+		 * common comparison being made.
+		 */
+		for (i = 0, in = 1; i < FRC_MAX; i++) {
+			if (n[i].c != m[i].c)
+				break;
+			if (n[i].s != m[i].s)
+				break;
+			if (n[i].s) {
+				if (n[i].n && (n[i].n > n[i].e)) {
+					m[i].p++;
+					in += m[i].p;
+					break;
+				}
+				if (n[i].e > 0) {
+					in++;
+				} else
+					break;
+			}
+		}
+		if (sin != in) {
+			for (j = sin - 1; j >= in; j--) {
+				indent(fp, j);
+				fprintf(fp, "}\n");
+			}
+		}
+	} else {
+		in = 1;
+		i = 0;
+	}
+
+	/*
+	 * print out C code that implements a filter rule.
+	 */
+	for (; i < FRC_MAX; i++) {
+		switch(m[i].c)
+		{
+		case FRC_IFN :
+			if (m[i].s) {
+				indent(fp, in);
+				fprintf(fp, "if (fin->fin_ifp == ");
+				fprintf(fp, "ipf_rules_%s_%s[%d]->fr_ifa) {\n",
+					dir ? "out" : "in", group, num);
+				in++;
+			}
+			break;
+		case FRC_V :
+			if (m[i].s) {
+				indent(fp, in);
+				fprintf(fp, "if (fin->fin_v == %d) {\n",
+					ipf->fri_ip.fi_v);
+				in++;
+			}
+			break;
+		case FRC_FL :
+			if (m[i].s) {
+				indent(fp, in);
+				fprintf(fp, "if (");
+				printeq(fp, "fin->fin_flx",
+				        ipf->fri_mip.fi_flx, 0xf,
+					ipf->fri_ip.fi_flx);
+				in++;
+			}
+			break;
+		case FRC_P :
+			if (m[i].s) {
+				indent(fp, in);
+				fprintf(fp, "if (fin->fin_p == %d) {\n",
+					ipf->fri_ip.fi_p);
+				in++;
+			}
+			break;
+		case FRC_TTL :
+			if (m[i].s) {
+				indent(fp, in);
+				fprintf(fp, "if (");
+				printeq(fp, "fin->fin_ttl",
+					ipf->fri_mip.fi_ttl, 0xff,
+					ipf->fri_ip.fi_ttl);
+				in++;
+			}
+			break;
+		case FRC_TOS :
+			if (m[i].s) {
+				indent(fp, in);
+				fprintf(fp, "if (fin->fin_tos");
+				printeq(fp, "fin->fin_tos",
+					ipf->fri_mip.fi_tos, 0xff,
+					ipf->fri_ip.fi_tos);
+				in++;
+			}
+			break;
+		case FRC_TCP :
+			if (m[i].s) {
+				indent(fp, in);
+				fprintf(fp, "if (");
+				printeq(fp, "fin->fin_tcpf", fr->fr_tcpfm,
+					0xff, fr->fr_tcpf);
+				in++;
+			}
+			break;
+		case FRC_SP :
+			if (!m[i].s)
+				break;
+			if (fr->fr_scmp == FR_INRANGE) {
+				indent(fp, in);
+				fprintf(fp, "if ((fin->fin_data[0] > %d) && ",
+					fr->fr_sport);
+				fprintf(fp, "(fin->fin_data[0] < %d)",
+					fr->fr_stop);
+				fprintf(fp, ") {\n");
+				in++;
+			} else if (fr->fr_scmp == FR_OUTRANGE) {
+				indent(fp, in);
+				fprintf(fp, "if ((fin->fin_data[0] < %d) || ",
+					fr->fr_sport);
+				fprintf(fp, "(fin->fin_data[0] > %d)",
+					fr->fr_stop);
+				fprintf(fp, ") {\n");
+				in++;
+			} else if (fr->fr_scmp) {
+				indent(fp, in);
+				fprintf(fp, "if (fin->fin_data[0] %s %d)",
+					portcmp[fr->fr_scmp], fr->fr_sport);
+				fprintf(fp, " {\n");
+				in++;
+			}
+			break;
+		case FRC_DP :
+			if (!m[i].s)
+				break;
+			if (fr->fr_dcmp == FR_INRANGE) {
+				indent(fp, in);
+				fprintf(fp, "if ((fin->fin_data[1] > %d) && ",
+					fr->fr_dport);
+				fprintf(fp, "(fin->fin_data[1] < %d)",
+					fr->fr_dtop);
+				fprintf(fp, ") {\n");
+				in++;
+			} else if (fr->fr_dcmp == FR_OUTRANGE) {
+				indent(fp, in);
+				fprintf(fp, "if ((fin->fin_data[1] < %d) || ",
+					fr->fr_dport);
+				fprintf(fp, "(fin->fin_data[1] > %d)",
+					fr->fr_dtop);
+				fprintf(fp, ") {\n");
+				in++;
+			} else if (fr->fr_dcmp) {
+				indent(fp, in);
+				fprintf(fp, "if (fin->fin_data[1] %s %d)",
+					portcmp[fr->fr_dcmp], fr->fr_dport);
+				fprintf(fp, " {\n");
+				in++;
+			}
+			break;
+		case FRC_SRC :
+			if (!m[i].s)
+				break;
+			if (fr->fr_satype == FRI_LOOKUP) {
+				;
+			} else if ((fr->fr_smask != 0) ||
+				   (fr->fr_flags & FR_NOTSRCIP) != 0) {
+				indent(fp, in);
+				fprintf(fp, "if (");
+				printipeq(fp, "src",
+					  fr->fr_flags & FR_NOTSRCIP,
+					  fr->fr_smask, fr->fr_saddr);
+				in++;
+			}
+			break;
+		case FRC_DST :
+			if (!m[i].s)
+				break;
+			if (fr->fr_datype == FRI_LOOKUP) {
+				;
+			} else if ((fr->fr_dmask != 0) ||
+				   (fr->fr_flags & FR_NOTDSTIP) != 0) {
+				indent(fp, in);
+				fprintf(fp, "if (");
+				printipeq(fp, "dst",
+					  fr->fr_flags & FR_NOTDSTIP,
+					  fr->fr_dmask, fr->fr_daddr);
+				in++;
+			}
+			break;
+		case FRC_OPT :
+			if (m[i].s) {
+				indent(fp, in);
+				fprintf(fp, "if (");
+				printeq(fp, "fin->fin_fi.fi_optmsk",
+					fr->fr_optmask, 0xffffffff,
+				        fr->fr_optbits);
+				in++;
+			}
+			break;
+		case FRC_SEC :
+			if (m[i].s) {
+				indent(fp, in);
+				fprintf(fp, "if (");
+				printeq(fp, "fin->fin_fi.fi_secmsk",
+					fr->fr_secmask, 0xffff,
+					fr->fr_secbits);
+				in++;
+			}
+			break;
+		case FRC_ATH :
+			if (m[i].s) {
+				indent(fp, in);
+				fprintf(fp, "if (");
+				printeq(fp, "fin->fin_fi.fi_authmsk",
+					fr->fr_authmask, 0xffff,
+					fr->fr_authbits);
+				in++;
+			}
+			break;
+		case FRC_ICT :
+			if (m[i].s) {
+				indent(fp, in);
+				fprintf(fp, "if (");
+				printeq(fp, "fin->fin_data[0]",
+					fr->fr_icmpm & 0xff00, 0xffff,
+					fr->fr_icmp & 0xff00);
+				in++;
+			}
+			break;
+		case FRC_ICC :
+			if (m[i].s) {
+				indent(fp, in);
+				fprintf(fp, "if (");
+				printeq(fp, "fin->fin_data[0]",
+					fr->fr_icmpm & 0xff, 0xffff,
+					fr->fr_icmp & 0xff);
+				in++;
+			}
+			break;
+		}
+
+	}
+
+	indent(fp, in);
+	if (fr->fr_flags & FR_QUICK) {
+		fprintf(fp, "return (frentry_t *)&%s_rule_%s_%d;\n",
+			fr->fr_flags & FR_INQUE ? "in" : "out",
+			FR_NAME(fr, fr_group), num);
+	} else {
+		fprintf(fp, "fr = (frentry_t *)&%s_rule_%s_%d;\n",
+			fr->fr_flags & FR_INQUE ? "in" : "out",
+			FR_NAME(fr, fr_group), num);
+	}
+	if (n == NULL)
+		n = (mc_t *)malloc(sizeof(*n) * FRC_MAX);
+	bcopy((char *)m, (char *)n, sizeof(*n) * FRC_MAX);
+	sin = in;
+}
+
+
+void printC(dir)
+	int dir;
+{
+	static mc_t *m = NULL;
+	frgroup_t *g;
+
+	if (m == NULL)
+		m = (mc_t *)calloc(1, sizeof(*m) * FRC_MAX);
+
+	for (g = groups; g != NULL; g = g->fg_next) {
+		if ((dir == 0) && ((g->fg_flags & FR_INQUE) != 0))
+			printCgroup(dir, g->fg_start, m, g->fg_name);
+		if ((dir == 1) && ((g->fg_flags & FR_OUTQUE) != 0))
+			printCgroup(dir, g->fg_start, m, g->fg_name);
+	}
+
+	emit(-1, dir, m, NULL);
+}
+
+
+/*
+ * Now print out code to implement all of the rules.
+ */
+static void printCgroup(dir, top, m, group)
+	int dir;
+	frentry_t *top;
+	mc_t *m;
+	char *group;
+{
+	frentry_t *fr, *fr1;
+	int i, n, rn;
+	u_int count;
+
+	for (count = 0, fr1 = top; fr1 != NULL; fr1 = fr1->fr_next) {
+		if ((dir == 0) && ((fr1->fr_flags & FR_INQUE) != 0))
+			count++;
+		else if ((dir == 1) && ((fr1->fr_flags & FR_OUTQUE) != 0))
+			count++;
+	}
+
+	if (dir == 0)
+		emitGroup(-2, dir, m, fr1, group, count, 0);
+	else if (dir == 1)
+		emitGroup(-2, dir, m, fr1, group, 0, count);
+
+	/*
+	 * Before printing each rule, check to see how many of its fields are
+	 * matched by subsequent rules.
+	 */
+	for (fr1 = top, rn = 0; fr1 != NULL; fr1 = fr1->fr_next, rn++) {
+		if (!dir && !(fr1->fr_flags & FR_INQUE))
+			continue;
+		if (dir && !(fr1->fr_flags & FR_OUTQUE))
+			continue;
+		n = 0xfffffff;
+
+		for (i = 0; i < FRC_MAX; i++)
+			m[i].e = 0;
+		qsort(m, FRC_MAX, sizeof(mc_t), intcmp);
+
+		for (i = 0; i < FRC_MAX; i++) {
+			m[i].c = i;
+			m[i].e = 0;
+			m[i].n = 0;
+			m[i].s = 0;
+		}
+
+		for (fr = fr1->fr_next; fr; fr = fr->fr_next) {
+			if (!dir && !(fr->fr_flags & FR_INQUE))
+				continue;
+			if (dir && !(fr->fr_flags & FR_OUTQUE))
+				continue;
+
+			if ((n & 0x0001) &&
+			    !strcmp(fr1->fr_names + fr1->fr_ifnames[0],
+				    fr->fr_names + fr->fr_ifnames[0])) {
+				m[FRC_IFN].e++;
+				m[FRC_IFN].n++;
+			} else
+				n &= ~0x0001;
+
+			if ((n & 0x0002) && (fr1->fr_family == fr->fr_family)) {
+				m[FRC_V].e++;
+				m[FRC_V].n++;
+			} else
+				n &= ~0x0002;
+
+			if ((n & 0x0004) &&
+			    (fr->fr_type == fr1->fr_type) &&
+			    (fr->fr_type == FR_T_IPF) &&
+			    (fr1->fr_mip.fi_flx == fr->fr_mip.fi_flx) &&
+			    (fr1->fr_ip.fi_flx == fr->fr_ip.fi_flx)) {
+				m[FRC_FL].e++;
+				m[FRC_FL].n++;
+			} else
+				n &= ~0x0004;
+
+			if ((n & 0x0008) &&
+			    (fr->fr_type == fr1->fr_type) &&
+			    (fr->fr_type == FR_T_IPF) &&
+			    (fr1->fr_proto == fr->fr_proto)) {
+				m[FRC_P].e++;
+				m[FRC_P].n++;
+			} else
+				n &= ~0x0008;
+
+			if ((n & 0x0010) &&
+			    (fr->fr_type == fr1->fr_type) &&
+			    (fr->fr_type == FR_T_IPF) &&
+			    (fr1->fr_ttl == fr->fr_ttl)) {
+				m[FRC_TTL].e++;
+				m[FRC_TTL].n++;
+			} else
+				n &= ~0x0010;
+
+			if ((n & 0x0020) &&
+			    (fr->fr_type == fr1->fr_type) &&
+			    (fr->fr_type == FR_T_IPF) &&
+			    (fr1->fr_tos == fr->fr_tos)) {
+				m[FRC_TOS].e++;
+				m[FRC_TOS].n++;
+			} else
+				n &= ~0x0020;
+
+			if ((n & 0x0040) &&
+			    (fr->fr_type == fr1->fr_type) &&
+			    (fr->fr_type == FR_T_IPF) &&
+			    ((fr1->fr_tcpfm == fr->fr_tcpfm) &&
+			    (fr1->fr_tcpf == fr->fr_tcpf))) {
+				m[FRC_TCP].e++;
+				m[FRC_TCP].n++;
+			} else
+				n &= ~0x0040;
+
+			if ((n & 0x0080) &&
+			    (fr->fr_type == fr1->fr_type) &&
+			    (fr->fr_type == FR_T_IPF) &&
+			    ((fr1->fr_scmp == fr->fr_scmp) &&
+			     (fr1->fr_stop == fr->fr_stop) &&
+			     (fr1->fr_sport == fr->fr_sport))) {
+				m[FRC_SP].e++;
+				m[FRC_SP].n++;
+			} else
+				n &= ~0x0080;
+
+			if ((n & 0x0100) &&
+			    (fr->fr_type == fr1->fr_type) &&
+			    (fr->fr_type == FR_T_IPF) &&
+			    ((fr1->fr_dcmp == fr->fr_dcmp) &&
+			     (fr1->fr_dtop == fr->fr_dtop) &&
+			     (fr1->fr_dport == fr->fr_dport))) {
+				m[FRC_DP].e++;
+				m[FRC_DP].n++;
+			} else
+				n &= ~0x0100;
+
+			if ((n & 0x0200) &&
+			    (fr->fr_type == fr1->fr_type) &&
+			    (fr->fr_type == FR_T_IPF) &&
+			    ((fr1->fr_satype == FRI_LOOKUP) &&
+			    (fr->fr_satype == FRI_LOOKUP) &&
+			    (fr1->fr_srcnum == fr->fr_srcnum))) {
+				m[FRC_SRC].e++;
+				m[FRC_SRC].n++;
+			} else if ((n & 0x0200) &&
+				   (fr->fr_type == fr1->fr_type) &&
+				   (fr->fr_type == FR_T_IPF) &&
+				   (((fr1->fr_flags & FR_NOTSRCIP) ==
+				    (fr->fr_flags & FR_NOTSRCIP)))) {
+					if ((fr1->fr_smask == fr->fr_smask) &&
+					    (fr1->fr_saddr == fr->fr_saddr))
+						m[FRC_SRC].e++;
+					else
+						n &= ~0x0200;
+					if (fr1->fr_smask &&
+					    (fr1->fr_saddr & fr1->fr_smask) ==
+					    (fr->fr_saddr & fr1->fr_smask)) {
+						m[FRC_SRC].n++;
+						n |= 0x0200;
+					}
+			} else {
+				n &= ~0x0200;
+			}
+
+			if ((n & 0x0400) &&
+			    (fr->fr_type == fr1->fr_type) &&
+			    (fr->fr_type == FR_T_IPF) &&
+			    ((fr1->fr_datype == FRI_LOOKUP) &&
+			    (fr->fr_datype == FRI_LOOKUP) &&
+			    (fr1->fr_dstnum == fr->fr_dstnum))) {
+				m[FRC_DST].e++;
+				m[FRC_DST].n++;
+			} else if ((n & 0x0400) &&
+				   (fr->fr_type == fr1->fr_type) &&
+				   (fr->fr_type == FR_T_IPF) &&
+				   (((fr1->fr_flags & FR_NOTDSTIP) ==
+				    (fr->fr_flags & FR_NOTDSTIP)))) {
+					if ((fr1->fr_dmask == fr->fr_dmask) &&
+					    (fr1->fr_daddr == fr->fr_daddr))
+						m[FRC_DST].e++;
+					else
+						n &= ~0x0400;
+					if (fr1->fr_dmask &&
+					    (fr1->fr_daddr & fr1->fr_dmask) ==
+					    (fr->fr_daddr & fr1->fr_dmask)) {
+						m[FRC_DST].n++;
+						n |= 0x0400;
+					}
+			} else {
+				n &= ~0x0400;
+			}
+
+			if ((n & 0x0800) &&
+			    (fr->fr_type == fr1->fr_type) &&
+			    (fr->fr_type == FR_T_IPF) &&
+			    (fr1->fr_optmask == fr->fr_optmask) &&
+			    (fr1->fr_optbits == fr->fr_optbits)) {
+				m[FRC_OPT].e++;
+				m[FRC_OPT].n++;
+			} else
+				n &= ~0x0800;
+
+			if ((n & 0x1000) &&
+			    (fr->fr_type == fr1->fr_type) &&
+			    (fr->fr_type == FR_T_IPF) &&
+			    (fr1->fr_secmask == fr->fr_secmask) &&
+			    (fr1->fr_secbits == fr->fr_secbits)) {
+				m[FRC_SEC].e++;
+				m[FRC_SEC].n++;
+			} else
+				n &= ~0x1000;
+
+			if ((n & 0x10000) &&
+			    (fr->fr_type == fr1->fr_type) &&
+			    (fr->fr_type == FR_T_IPF) &&
+			    (fr1->fr_authmask == fr->fr_authmask) &&
+			    (fr1->fr_authbits == fr->fr_authbits)) {
+				m[FRC_ATH].e++;
+				m[FRC_ATH].n++;
+			} else
+				n &= ~0x10000;
+
+			if ((n & 0x20000) &&
+			    (fr->fr_type == fr1->fr_type) &&
+			    (fr->fr_type == FR_T_IPF) &&
+			    ((fr1->fr_icmpm & 0xff00) ==
+			     (fr->fr_icmpm & 0xff00)) &&
+			    ((fr1->fr_icmp & 0xff00) ==
+			     (fr->fr_icmp & 0xff00))) {
+				m[FRC_ICT].e++;
+				m[FRC_ICT].n++;
+			} else
+				n &= ~0x20000;
+
+			if ((n & 0x40000) &&
+			    (fr->fr_type == fr1->fr_type) &&
+			    (fr->fr_type == FR_T_IPF) &&
+			    ((fr1->fr_icmpm & 0xff) == (fr->fr_icmpm & 0xff)) &&
+			    ((fr1->fr_icmp & 0xff) == (fr->fr_icmp & 0xff))) {
+				m[FRC_ICC].e++;
+				m[FRC_ICC].n++;
+			} else
+				n &= ~0x40000;
+		}
+		/*msort(m);*/
+
+		if (dir == 0)
+			emitGroup(rn, dir, m, fr1, group, count, 0);
+		else if (dir == 1)
+			emitGroup(rn, dir, m, fr1, group, 0, count);
+	}
+}
+
+static void printhooks(fp, in, out, grp)
+	FILE *fp;
+	int in;
+	int out;
+	frgroup_t *grp;
+{
+	frentry_t *fr;
+	char *group;
+	int dogrp, i;
+	char *instr;
+
+	group = grp->fg_name;
+	dogrp = 0;
+
+	if (in && out) {
+		fprintf(stderr,
+			"printhooks called with both in and out set\n");
+		exit(1);
+	}
+
+	if (in) {
+		instr = "in";
+	} else if (out) {
+		instr = "out";
+	} else {
+		instr = "???";
+	}
+	fprintf(fp, "static frentry_t ipfrule_%s_%s;\n", instr, group);
+
+	fprintf(fp, "\
+\n\
+int ipfrule_add_%s_%s()\n", instr, group);
+	fprintf(fp, "\
+{\n\
+	int i, j, err = 0, max;\n\
+	frentry_t *fp;\n");
+
+	if (dogrp)
+		fprintf(fp, "\
+	frgroup_t *fg;\n");
+
+	fprintf(fp, "\n");
+
+	for (i = 0, fr = grp->fg_start; fr != NULL; i++, fr = fr->fr_next)
+		if (fr->fr_dsize > 0) {
+			fprintf(fp, "\
+	ipf_rules_%s_%s[%d]->fr_data = &ipf%s_rule_data_%s_%u;\n",
+				instr, grp->fg_name, i,
+				instr, grp->fg_name, i);
+		}
+	fprintf(fp, "\
+	max = sizeof(ipf_rules_%s_%s)/sizeof(frentry_t *);\n\
+	for (i = 0; i < max; i++) {\n\
+		fp = ipf_rules_%s_%s[i];\n\
+		fp->fr_next = NULL;\n", instr, group, instr, group);
+
+	fprintf(fp, "\
+		for (j = i + 1; j < max; j++)\n\
+			if (strncmp(fp->fr_names + fp->fr_group,\n\
+				    ipf_rules_%s_%s[j]->fr_names +\n\
+				    ipf_rules_%s_%s[j]->fr_group,\n\
+				    FR_GROUPLEN) == 0) {\n\
+				if (ipf_rules_%s_%s[j] != NULL)\n\
+					ipf_rules_%s_%s[j]->fr_pnext =\n\
+					    &fp->fr_next;\n\
+				fp->fr_pnext = &ipf_rules_%s_%s[j];\n\
+				fp->fr_next = ipf_rules_%s_%s[j];\n\
+				break;\n\
+			}\n", instr, group, instr, group, instr, group,
+			      instr, group, instr, group, instr, group);
+	if (dogrp)
+		fprintf(fp, "\
+\n\
+		if (fp->fr_grhead != -1) {\n\
+			fg = fr_addgroup(fp->fr_names + fp->fr_grhead,\n\
+					 fp, FR_INQUE, IPL_LOGIPF, 0);\n\
+			if (fg != NULL)\n\
+				fp->fr_grp = &fg->fg_start;\n\
+		}\n");
+	fprintf(fp, "\
+	}\n\
+\n\
+	fp = &ipfrule_%s_%s;\n", instr, group);
+		fprintf(fp, "\
+	bzero((char *)fp, sizeof(*fp));\n\
+	fp->fr_type = FR_T_CALLFUNC_BUILTIN;\n\
+	fp->fr_flags = FR_%sQUE|FR_NOMATCH;\n\
+	fp->fr_data = (void *)ipf_rules_%s_%s[0];\n",
+		(in != 0) ? "IN" : "OUT", instr, group);
+	fprintf(fp, "\
+	fp->fr_dsize = sizeof(ipf_rules_%s_%s[0]);\n",
+		instr, group);
+
+	fprintf(fp, "\
+	fp->fr_family = AF_INET;\n\
+	fp->fr_func = (ipfunc_t)ipfrule_match_%s_%s;\n\
+	err = frrequest(&ipfmain, IPL_LOGIPF, SIOCADDFR, (caddr_t)fp,\n\
+			ipfmain.ipf_active, 0);\n",
+			instr, group);
+	fprintf(fp, "\treturn err;\n}\n");
+
+	fprintf(fp, "\n\n\
+int ipfrule_remove_%s_%s()\n", instr, group);
+	fprintf(fp, "\
+{\n\
+	int err = 0, i;\n\
+	frentry_t *fp;\n\
+\n\
+	/*\n\
+	 * Try to remove the %sbound rule.\n", instr);
+
+	fprintf(fp, "\
+	 */\n\
+	if (ipfrule_%s_%s.fr_ref > 0) {\n", instr, group);
+
+	fprintf(fp, "\
+		err = EBUSY;\n\
+	} else {\n");
+
+	fprintf(fp, "\
+		i = sizeof(ipf_rules_%s_%s)/sizeof(frentry_t *) - 1;\n\
+		for (; i >= 0; i--) {\n\
+			fp = ipf_rules_%s_%s[i];\n\
+			if (fp->fr_ref > 1) {\n\
+				err = EBUSY;\n\
+				break;\n\
+			}\n\
+		}\n\
+	}\n\
+	if (err == 0)\n\
+		err = frrequest(&ipfmain, IPL_LOGIPF, SIOCDELFR,\n\
+				(caddr_t)&ipfrule_%s_%s,\n\
+				ipfmain.ipf_active, 0);\n",
+		instr, group, instr, group, instr, group);
+	fprintf(fp, "\
+	if (err)\n\
+		return err;\n\
+\n\n");
+
+	fprintf(fp, "\treturn err;\n}\n");
+}