1 files changed, 296 insertions, 0 deletions

diff --git a/src/libfreeswan/ttosubnet.c b/src/libfreeswan/ttosubnet.c
new file mode 100644
index 000000000..7f5cddb82
--- /dev/null
+++ b/src/libfreeswan/ttosubnet.c
@@ -0,0 +1,296 @@
+/*
+ * convert from text form of subnet specification to binary
+ * Copyright (C) 2000  Henry Spencer.
+ * 
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Library General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/lgpl.txt>.
+ * 
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
+ * License for more details.
+ *
+ * RCSID $Id: ttosubnet.c,v 1.1 2004/03/15 20:35:26 as Exp $
+ */
+#include "internal.h"
+#include "freeswan.h"
+
+#ifndef DEFAULTSUBNET
+#define	DEFAULTSUBNET	"%default"
+#endif
+
+/*
+ - ttosubnet - convert text "addr/mask" to address and mask
+ * Mask can be integer bit count.
+ */
+err_t
+ttosubnet(src, srclen, af, dst)
+const char *src;
+size_t srclen;			/* 0 means "apply strlen" */
+int af;				/* AF_INET or AF_INET6 */
+ip_subnet *dst;
+{
+	const char *slash;
+	const char *colon;
+	const char *mask;
+	size_t mlen;
+	const char *oops;
+	unsigned long bc;
+	static char def[] = DEFAULTSUBNET;
+#	define	DEFLEN	(sizeof(def) - 1)	/* -1 for NUL */
+	static char defis4[] = "0/0";
+#	define	DEFIS4LEN	(sizeof(defis4) - 1)
+	static char defis6[] = "::/0";
+#	define	DEFIS6LEN	(sizeof(defis6) - 1)
+	ip_address addrtmp;
+	ip_address masktmp;
+	int nbits;
+	int i;
+
+	if (srclen == 0)
+		srclen = strlen(src);
+	if (srclen == 0)
+		return "empty string";
+
+	switch (af) {
+	case AF_INET:
+		nbits = 32;
+		break;
+	case AF_INET6:
+		nbits = 128;
+		break;
+	default:
+		return "unknown address family in ttosubnet";
+		break;
+	}
+
+	if (srclen == DEFLEN && strncmp(src, def, srclen) == 0) {
+		src = (af == AF_INET) ? defis4 : defis6;
+		srclen = (af == AF_INET) ? DEFIS4LEN : DEFIS6LEN;
+	}
+
+	slash = memchr(src, '/', srclen);
+	if (slash == NULL)
+		return "no / in subnet specification";
+	mask = slash + 1;
+	mlen = srclen - (mask - src);
+
+	oops = ttoaddr(src, slash-src, af, &addrtmp);
+	if (oops != NULL)
+		return oops;
+
+	/* extract port */
+	colon = memchr(mask, ':', mlen);
+	if (colon == 0)
+	{
+		setportof(0, &addrtmp);
+	}
+	else
+	{
+		long port;
+
+		oops =  ttoul(colon+1, mlen-(colon-mask+1), 10, &port);
+		if (oops != NULL)
+			return oops;
+		setportof(htons(port), &addrtmp);
+		mlen = colon - mask;
+	}
+
+	/*extract mask */
+	oops = ttoul(mask, mlen, 10, &bc);
+	if (oops == NULL) {
+		/* ttoul succeeded, it's a bit-count mask */
+		if (bc > nbits)
+			return "subnet mask bit count too large";
+		i = bc;
+	} else {
+		oops = ttoaddr(mask, mlen, af, &masktmp);
+		if (oops != NULL)
+			return oops;
+		i = masktocount(&masktmp);
+		if (i < 0)
+			return "non-contiguous or otherwise erroneous mask";
+	}
+
+	return initsubnet(&addrtmp, i, '0', dst);
+}
+
+
+
+#ifdef TTOSUBNET_MAIN
+
+#include <stdio.h>
+
+void regress(void);
+
+int main(int argc, char *argv[])
+{
+	ip_subnet s;
+	char buf[100];
+	char buf2[100];
+	const char *oops;
+	size_t n;
+	int af;
+	char *p;
+
+	if (argc < 2) {
+		fprintf(stderr, "Usage: %s [-6] addr/mask\n", argv[0]);
+		fprintf(stderr, "   or: %s -r\n", argv[0]);
+		exit(2);
+	}
+
+	if (strcmp(argv[1], "-r") == 0) {
+		regress();
+		fprintf(stderr, "regress() returned?!?\n");
+		exit(1);
+	}
+
+	af = AF_INET;
+	p = argv[1];
+	if (strcmp(argv[1], "-6") == 0) {
+		af = AF_INET6;
+		p = argv[2];
+	} else if (strchr(argv[1], ':') != NULL)
+		af = AF_INET6;
+
+	oops = ttosubnet(p, 0, af, &s);
+	if (oops != NULL) {
+		fprintf(stderr, "%s: conversion failed: %s\n", argv[0], oops);
+		exit(1);
+	}
+	n = subnettot(&s, 0, buf, sizeof(buf));
+	if (n > sizeof(buf)) {
+		fprintf(stderr, "%s: reverse conversion of ", argv[0]);
+		(void) addrtot(&s.addr, 0, buf2, sizeof(buf2));
+		fprintf(stderr, "%s/", buf2);
+		fprintf(stderr, "%d", s.maskbits);
+		fprintf(stderr, " failed: need %ld bytes, have only %ld\n",
+						(long)n, (long)sizeof(buf));
+		exit(1);
+	}
+	printf("%s\n", buf);
+
+	exit(0);
+}
+
+struct rtab {
+	int family;
+	char *input;
+	char *output;			/* NULL means error expected */
+} rtab[] = {
+	{4, "1.2.3.0/255.255.255.0",	"1.2.3.0/24"},
+	{4, "1.2.3.0/24",		"1.2.3.0/24"},
+	{4, "1.2.3.0/24:10",		"1.2.3.0/24:10"},
+	{4, "1.2.3.0/24:-1",		NULL},
+	{4, "1.2.3.0/24:none",		NULL},
+	{4, "1.2.3.0/24:",		NULL},
+	{4, "1.2.3.0/24:0x10",		"1.2.3.0/24:16"},
+	{4, "1.2.3.0/24:0X10",		"1.2.3.0/24:16"},
+	{4, "1.2.3.0/24:010",		"1.2.3.0/24:8"},
+	{4, "1.2.3.1/255.255.255.240",	"1.2.3.0/28"},
+	{4, "1.2.3.1/32",		"1.2.3.1/32"},
+	{4, "1.2.3.1/0",			"0.0.0.0/0"},
+/*	{4, "1.2.3.1/255.255.127.0",	"1.2.3.0/255.255.127.0"},	*/
+	{4, "1.2.3.1/255.255.127.0",	NULL},
+	{4, "128.009.000.032/32",	"128.9.0.32/32"},
+	{4, "128.0x9.0.32/32",		NULL},
+	{4, "0x80090020/32",		"128.9.0.32/32"},
+	{4, "0x800x0020/32",		NULL},
+	{4, "128.9.0.32/0xffFF0000",	"128.9.0.0/16"},
+	{4, "128.9.0.32/0xff0000FF",	NULL},
+	{4, "128.9.0.32/0x0000ffFF",	NULL},
+	{4, "128.9.0.32/0x00ffFF0000",	NULL},
+	{4, "128.9.0.32/0xffFF",	NULL},
+	{4, "128.9.0.32.27/32",		NULL},
+	{4, "128.9.0k32/32",		NULL},
+	{4, "328.9.0.32/32",		NULL},
+	{4, "128.9..32/32",		NULL},
+	{4, "10/8",			"10.0.0.0/8"},
+	{4, "10.0/8",			"10.0.0.0/8"},
+	{4, "10.0.0/8",			"10.0.0.0/8"},
+	{4, "10.0.1/24",			"10.0.1.0/24"},
+	{4, "_",				NULL},
+	{4, "_/_",			NULL},
+	{4, "1.2.3.1",			NULL},
+	{4, "1.2.3.1/_",			NULL},
+	{4, "1.2.3.1/24._",		NULL},
+	{4, "1.2.3.1/99",		NULL},
+	{4, "localhost/32", 		"127.0.0.1/32"},
+	{4, "%default",			"0.0.0.0/0"},
+	{6, "3049:1::8007:2040/0",	"::/0"},
+	{6, "3049:1::8007:2040/128",	"3049:1::8007:2040/128"},
+	{6, "3049:1::192.168.0.1/128", NULL},	/*"3049:1::c0a8:1/128",*/
+	{6, "3049:1::8007::2040/128",	NULL},
+	{6, "3049:1::8007:2040/ffff::0",	"3049::/16"},
+	{6, "3049:1::8007:2040/64",	"3049:1::/64"},
+	{6, "3049:1::8007:2040/ffff::",	"3049::/16"},
+	{6, "3049:1::8007:2040/0000:ffff::0",	NULL},
+	{6, "3049:1::8007:2040/ff1f::0",	NULL},
+	{6, "3049:1::8007:x:2040/128",	NULL},
+	{6, "3049:1t::8007:2040/128",	NULL},
+	{6, "3049:1::80071:2040/128",	NULL},
+	{6, "::/21",			"::/21"},
+	{6, "::1/128",			"::1/128"},
+	{6, "1::/21",			"1::/21"},
+	{6, "1::2/128",			"1::2/128"},
+	{6, "1:0:0:0:0:0:0:2/128",	"1::2/128"},
+	{6, "1:0:0:0:3:0:0:2/128",	"1::3:0:0:2/128"},
+	{6, "1:0:0:3:0:0:0:2/128",	"1::3:0:0:0:2/128"},
+	{6, "1:0:3:0:0:0:0:2/128",	"1:0:3::2/128"},
+	{6, "abcd:ef01:2345:6789:0:00a:000:20/128",	"abcd:ef01:2345:6789:0:a:0:20/128"},
+	{6, "3049:1::8007:2040/ffff:ffff:",	NULL},
+	{6, "3049:1::8007:2040/ffff:88::",	NULL},
+	{6, "3049:12::9000:3200/ffff:fff0::",	"3049:10::/28"},
+	{6, "3049:12::9000:3200/28",	"3049:10::/28"},
+	{6, "3049:12::9000:3200/ff00:::",	NULL},
+	{6, "3049:12::9000:3200/ffff:::",	NULL},
+	{6, "3049:12::9000:3200/128_",	NULL},
+	{6, "3049:12::9000:3200/",	NULL},
+	{6, "%default",			"::/0"},
+        {4, NULL,			NULL}
+};
+
+void
+regress(void)
+{
+	struct rtab *r;
+	int status = 0;
+	ip_subnet s;
+	char in[100];
+	char buf[100];
+	const char *oops;
+	size_t n;
+	int af;
+
+	for (r = rtab; r->input != NULL; r++) {
+		af = (r->family == 4) ? AF_INET : AF_INET6;
+		strcpy(in, r->input);
+		oops = ttosubnet(in, 0, af, &s);
+		if (oops != NULL && r->output == NULL)
+			{}		/* okay, error expected */
+		else if (oops != NULL) {
+			printf("`%s' ttosubnet failed: %s\n", r->input, oops);
+			status = 1;
+		} else if (r->output == NULL) {
+			printf("`%s' ttosubnet succeeded unexpectedly\n",
+								r->input);
+			status = 1;
+		} else {
+			n = subnettot(&s, 0, buf, sizeof(buf));
+			if (n > sizeof(buf)) {
+				printf("`%s' subnettot failed:  need %ld\n",
+							r->input, (long)n);
+				status = 1;
+			} else if (strcmp(r->output, buf) != 0) {
+				printf("`%s' gave `%s', expected `%s'\n",
+						r->input, buf, r->output);
+				status = 1;
+			}
+		}
+	}
+	exit(status);
+}
+
+#endif /* TTOSUBNET_MAIN */