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SubjectRe: [PATCH] IPv6: Privacy Extensions for Stateless Address Autoconfiguration in IPv6
From
Hi,

In article <20030223.225251.119557134.davem@redhat.com> (at Sun, 23 Feb 2003 22:52:51 -0800 (PST)), "David S. Miller" <davem@redhat.com> says:

> MD5 code in linux-2.4.x patch what I sent you was taken from
> Colin Plumb's public domain implementation.
> (USAGI itself uses KAME implementation.)
>
> Please send me the 2.4.x version of the privacy
> extension patch so that I may have a look.

Here's the patch for linux-2.4.21-pre4.
Thanks.

Index: Documentation/Configure.help
===================================================================
RCS file: /cvsroot/usagi/usagi-backport/linux24/Documentation/Configure.help,v
retrieving revision 1.1.1.4
retrieving revision 1.1.1.4.2.1
diff -u -r1.1.1.4 -r1.1.1.4.2.1
--- Documentation/Configure.help 24 Feb 2003 09:48:53 -0000 1.1.1.4
+++ Documentation/Configure.help 24 Feb 2003 10:40:59 -0000 1.1.1.4.2.1
@@ -5627,6 +5627,19 @@

It is safe to say N here for now.

+IPv6: Privacy Extensions (RFC 3041) support
+CONFIG_IPV6_PRIVACY
+ Privacy Extensions for Stateless Address Autoconfiguration in IPv6
+ support. With this option, additional periodically-alter
+ pseudo-random global-scope unicast address(es) will assigned to
+ your interface(s).
+
+ By default, kernel generates temporary addresses but it won't use
+ them unless application explicitly bind them. To prefer temporary
+ address, do
+
+ echo 2 >/proc/sys/net/ipv6/conf/all/use_tempaddr
+
Kernel httpd acceleration
CONFIG_KHTTPD
The kernel httpd acceleration daemon (kHTTPd) is a (limited) web
Index: Documentation/networking/ip-sysctl.txt
===================================================================
RCS file: /cvsroot/usagi/usagi-backport/linux24/Documentation/networking/ip-sysctl.txt,v
retrieving revision 1.1.1.2
retrieving revision 1.1.1.2.2.1
diff -u -r1.1.1.2 -r1.1.1.2.2.1
--- Documentation/networking/ip-sysctl.txt 24 Feb 2003 09:48:56 -0000 1.1.1.2
+++ Documentation/networking/ip-sysctl.txt 24 Feb 2003 10:40:59 -0000 1.1.1.2.2.1
@@ -613,6 +613,36 @@
routers are present.
Default: 3

+use_tempaddr - INTEGER
+ Preference for Privacy Extensions (RFC3041).
+ <= 0 : disable Privacy Extensions
+ == 1 : enable Privacy Extensions, but prefer public
+ addresses over temporary addresses.
+ > 1 : enable Privacy Extensions and prefer temporary
+ addresses over public addresses.
+ Default: 1 (for most devices)
+ 0 (for point-to-point devices and loopback devices)
+
+temp_valid_lft - INTEGER
+ valid lifetime (in seconds) for temporary addresses.
+ Default: 604800 (7 days)
+
+temp_prefered_lft - INTEGER
+ Preferred lifetime (in seconds) for temorary addresses.
+ Default: 86400 (1 day)
+
+max_desync_factor - INTEGER
+ Maximum value for DESYNC_FACTOR, which is a random value
+ that ensures that clients don't synchronize with each
+ other and generage new addresses at exactly the same time.
+ value is in seconds.
+ Default: 600
+
+regen_max_retry - INTEGER
+ Number of attempts before give up attempting to generate
+ valid temporary addresses.
+ Default: 5
+
icmp/*:
ratelimit - INTEGER
Limit the maximal rates for sending ICMPv6 packets.
Index: include/linux/md5.h
===================================================================
RCS file: include/linux/md5.h
diff -N include/linux/md5.h
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ include/linux/md5.h 24 Feb 2003 10:40:59 -0000 1.1.6.1
@@ -0,0 +1,23 @@
+/*
+ * md5.h - for lib/md5.c
+ *
+ * $USAGI: md5.h,v 1.1.6.1 2003/02/24 10:40:59 yoshfuji Exp $
+ */
+
+#ifndef _LINUX_MD5_H
+#define _LINUX_MD5_H
+
+typedef struct MD5Context {
+ __u32 buf[4];
+ __u32 bits[2];
+ __u8 in[64];
+} MD5_CTX;
+
+void MD5Init(struct MD5Context *context);
+void MD5Update(struct MD5Context *context,
+ __u8 const *buf, unsigned int len);
+void MD5Final(__u8 digest[16],
+ struct MD5Context *context);
+void MD5Transform(__u32 buf[4], __u32 const in[16]);
+
+#endif /* !_LINUX_MD5_H */
Index: include/linux/rtnetlink.h
===================================================================
RCS file: /cvsroot/usagi/usagi-backport/linux24/include/linux/rtnetlink.h,v
retrieving revision 1.1.1.2
retrieving revision 1.1.1.2.30.1
diff -u -r1.1.1.2 -r1.1.1.2.30.1
--- include/linux/rtnetlink.h 9 Oct 2002 01:35:37 -0000 1.1.1.2
+++ include/linux/rtnetlink.h 24 Feb 2003 10:40:59 -0000 1.1.1.2.30.1
@@ -315,6 +315,7 @@
/* ifa_flags */

#define IFA_F_SECONDARY 0x01
+#define IFA_F_TEMPORARY IFA_F_SECONDARY

#define IFA_F_DEPRECATED 0x20
#define IFA_F_TENTATIVE 0x40
Index: include/linux/sysctl.h
===================================================================
RCS file: /cvsroot/usagi/usagi-backport/linux24/include/linux/sysctl.h,v
retrieving revision 1.1.1.3
retrieving revision 1.1.1.3.2.1
diff -u -r1.1.1.3 -r1.1.1.3.2.1
--- include/linux/sysctl.h 24 Feb 2003 09:47:45 -0000 1.1.1.3
+++ include/linux/sysctl.h 24 Feb 2003 10:40:59 -0000 1.1.1.3.2.1
@@ -375,7 +375,12 @@
NET_IPV6_DAD_TRANSMITS=7,
NET_IPV6_RTR_SOLICITS=8,
NET_IPV6_RTR_SOLICIT_INTERVAL=9,
- NET_IPV6_RTR_SOLICIT_DELAY=10
+ NET_IPV6_RTR_SOLICIT_DELAY=10,
+ NET_IPV6_USE_TEMPADDR=11,
+ NET_IPV6_TEMP_VALID_LFT=12,
+ NET_IPV6_TEMP_PREFERED_LFT=13,
+ NET_IPV6_REGEN_MAX_RETRY=14,
+ NET_IPV6_MAX_DESYNC_FACTOR=15
};

/* /proc/sys/net/ipv6/icmp */
Index: include/net/addrconf.h
===================================================================
RCS file: /cvsroot/usagi/usagi-backport/linux24/include/net/addrconf.h,v
retrieving revision 1.1.1.2
retrieving revision 1.1.1.2.2.1
diff -u -r1.1.1.2 -r1.1.1.2.2.1
--- include/net/addrconf.h 24 Feb 2003 09:47:49 -0000 1.1.1.2
+++ include/net/addrconf.h 24 Feb 2003 10:40:59 -0000 1.1.1.2.2.1
@@ -6,6 +6,11 @@
#define MAX_RTR_SOLICITATIONS 3
#define RTR_SOLICITATION_INTERVAL (4*HZ)

+#define TEMP_VALID_LIFETIME (7*86400)
+#define TEMP_PREFERRED_LIFETIME (86400)
+#define REGEN_MAX_RETRY (5)
+#define MAX_DESYNC_FACTOR (600)
+
#define ADDR_CHECK_FREQUENCY (120*HZ)

struct prefix_info {
Index: include/net/if_inet6.h
===================================================================
RCS file: /cvsroot/usagi/usagi-backport/linux24/include/net/if_inet6.h,v
retrieving revision 1.1.1.1
retrieving revision 1.1.1.1.54.1
diff -u -r1.1.1.1 -r1.1.1.1.54.1
--- include/net/if_inet6.h 20 Aug 2002 09:46:45 -0000 1.1.1.1
+++ include/net/if_inet6.h 24 Feb 2003 10:40:59 -0000 1.1.1.1.54.1
@@ -43,6 +43,12 @@
struct inet6_ifaddr *lst_next; /* next addr in addr_lst */
struct inet6_ifaddr *if_next; /* next addr in inet6_dev */

+#ifdef CONFIG_IPV6_PRIVACY
+ struct inet6_ifaddr *tmp_next; /* next addr in tempaddr_lst */
+ struct inet6_ifaddr *ifpub;
+ int regen_count;
+#endif
+
int dead;
};

@@ -86,7 +92,13 @@
int rtr_solicits;
int rtr_solicit_interval;
int rtr_solicit_delay;
-
+#ifdef CONFIG_IPV6_PRIVACY
+ int use_tempaddr;
+ int temp_valid_lft;
+ int temp_prefered_lft;
+ int regen_max_retry;
+ int max_desync_factor;
+#endif
void *sysctl;
};

@@ -100,6 +112,13 @@
atomic_t refcnt;
__u32 if_flags;
int dead;
+
+#ifdef CONFIG_IPV6_PRIVACY
+ u8 rndid[8];
+ u8 entropy[8];
+ struct timer_list regen_timer;
+ struct inet6_ifaddr *tempaddr_list;
+#endif

struct neigh_parms *nd_parms;
struct inet6_dev *next;
Index: lib/Config.in
===================================================================
RCS file: /cvsroot/usagi/usagi-backport/linux24/lib/Config.in,v
retrieving revision 1.1.1.1
retrieving revision 1.1.1.1.26.1
diff -u -r1.1.1.1 -r1.1.1.1.26.1
--- lib/Config.in 9 Oct 2002 01:35:37 -0000 1.1.1.1
+++ lib/Config.in 24 Feb 2003 10:40:59 -0000 1.1.1.1.26.1
@@ -5,6 +5,19 @@
comment 'Library routines'

#
+# MD5 digest
+#
+if [ "$CONFIG_IPV6_PRIVACY" = "y" ]; then
+ if [ "$CONFIG_IPV6" = "y" ]; then
+ define_tristate CONFIG_MD5 y
+ else
+ define_tristate CONFIG_MD5 m
+ fi
+else
+ tristate 'MD5 digest support' CONFIG_MD5
+fi
+
+#
# Do we need the compression support?
#
if [ "$CONFIG_CRAMFS" = "y" -o \
Index: lib/Makefile
===================================================================
RCS file: /cvsroot/usagi/usagi-backport/linux24/lib/Makefile,v
retrieving revision 1.1.1.2
retrieving revision 1.1.1.2.30.1
diff -u -r1.1.1.2 -r1.1.1.2.30.1
--- lib/Makefile 9 Oct 2002 01:35:37 -0000 1.1.1.2
+++ lib/Makefile 24 Feb 2003 10:40:59 -0000 1.1.1.2.30.1
@@ -20,6 +20,11 @@
obj-y += dec_and_lock.o
endif

+obj-$(CONFIG_MD5) += md5.o
+ifeq ($(CONFIG_MD5),y)
+ export-objs += md5.o
+endif
+
subdir-$(CONFIG_ZLIB_INFLATE) += zlib_inflate
subdir-$(CONFIG_ZLIB_DEFLATE) += zlib_deflate

Index: lib/md5.c
===================================================================
RCS file: lib/md5.c
diff -N lib/md5.c
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ lib/md5.c 24 Feb 2003 10:40:59 -0000 1.1.6.1
@@ -0,0 +1,252 @@
+/*
+ * This code implements the MD5 message-digest algorithm.
+ * The algorithm is due to Ron Rivest. This code was
+ * written by Colin Plumb in 1993, no copyright is claimed.
+ * This code is in the public domain; do with it what you wish.
+ *
+ * Equivalent code is available from RSA Data Security, Inc.
+ * This code has been tested against that, and is equivalent,
+ * except that you don't need to include two pages of legalese
+ * with every copy.
+ *
+ * To compute the message digest of a chunk of bytes, declare an
+ * MD5Context structure, pass it to MD5Init, call MD5Update as
+ * needed on buffers full of bytes, and then call MD5Final, which
+ * will fill a supplied 16-byte array with the digest.
+ *
+ * Modified for Linux kernel by YOSHIFUJI Hideaki / USAGI Project.
+ * $USAGI: md5.c,v 1.1.6.1 2003/02/24 10:40:59 yoshfuji Exp $
+ */
+#include <asm/byteorder.h>
+#include <linux/module.h>
+#include <linux/string.h> /* for memcpy() */
+#include <linux/md5.h>
+
+#ifndef __LITTLE_ENDIAN
+#define byteReverse(buf, len) do { } while(0)
+#else
+static inline void byteReverse(u32 *p, int longs)
+{
+ do {
+ *p = cpu_to_le32p(p);
+ p++;
+ } while (--longs);
+}
+#endif
+
+/*
+ * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
+ * initialization constants.
+ */
+void MD5Init(struct MD5Context *ctx)
+{
+ ctx->buf[0] = 0x67452301;
+ ctx->buf[1] = 0xefcdab89;
+ ctx->buf[2] = 0x98badcfe;
+ ctx->buf[3] = 0x10325476;
+
+ ctx->bits[0] = 0;
+ ctx->bits[1] = 0;
+}
+
+/*
+ * Update context to reflect the concatenation of another buffer full
+ * of bytes.
+ */
+void
+MD5Update(struct MD5Context *ctx, u8 const *buf, unsigned int len)
+{
+ unsigned int t;
+
+ /* Update bitcount */
+
+ t = ctx->bits[0];
+ if ((ctx->bits[0] = t + ((u32) len << 3)) < t)
+ ctx->bits[1]++; /* Carry from low to high */
+ ctx->bits[1] += len >> 29;
+
+ t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */
+
+ /* Handle any leading odd-sized chunks */
+
+ if (t) {
+ u8 *p = (u8 *) ctx->in + t;
+
+ t = 64 - t;
+ if (len < t) {
+ memcpy(p, buf, len);
+ return;
+ }
+ memcpy(p, buf, t);
+ byteReverse((u32*)ctx->in, 16);
+ MD5Transform(ctx->buf, (u32 *) ctx->in);
+ buf += t;
+ len -= t;
+ }
+ /* Process data in 64-byte chunks */
+
+ while (len >= 64) {
+ memcpy(ctx->in, buf, 64);
+ byteReverse((u32*)ctx->in, 16);
+ MD5Transform(ctx->buf, (u32 *) ctx->in);
+ buf += 64;
+ len -= 64;
+ }
+
+ /* Handle any remaining bytes of data. */
+
+ memcpy(ctx->in, buf, len);
+}
+
+/*
+ * Final wrapup - pad to 64-byte boundary with the bit pattern
+ * 1 0* (64-bit count of bits processed, MSB-first)
+ */
+void MD5Final(u8 digest[16], struct MD5Context *ctx)
+{
+ u32 count;
+ u8 *p;
+
+ /* Compute number of bytes mod 64 */
+ count = (ctx->bits[0] >> 3) & 0x3F;
+
+ /* Set the first char of padding to 0x80. This is safe since there is
+ * always at least one byte free */
+ p = ctx->in + count;
+ *p++ = 0x80;
+
+ /* Bytes of padding needed to make 64 bytes */
+ count = 64 - 1 - count;
+
+ /* Pad out to 56 mod 64 */
+ if (count < 8) {
+ /* Two lots of padding: Pad the first block to 64 bytes */
+ memset(p, 0, count);
+ byteReverse((u32*)ctx->in, 16);
+ MD5Transform(ctx->buf, (u32 *) ctx->in);
+
+ /* Now fill the next block with 56 bytes */
+ memset(ctx->in, 0, 56);
+ } else {
+ /* Pad block to 56 bytes */
+ memset(p, 0, count - 8);
+ }
+ byteReverse((u32*)ctx->in, 14);
+
+ /* Append length in bits and transform */
+ ((u32 *) ctx->in)[14] = ctx->bits[0];
+ ((u32 *) ctx->in)[15] = ctx->bits[1];
+
+ MD5Transform(ctx->buf, (u32 *) ctx->in);
+ byteReverse(ctx->buf, 4);
+ memcpy(digest, ctx->buf, 16);
+ memset((char *) ctx, 0, sizeof(ctx)); /* In case it's sensitive */
+}
+
+/* The four core functions - F1 is optimized somewhat */
+
+/* #define F1(x, y, z) (x & y | ~x & z) */
+#define F1(x, y, z) (z ^ (x & (y ^ z)))
+#define F2(x, y, z) F1(z, x, y)
+#define F3(x, y, z) (x ^ y ^ z)
+#define F4(x, y, z) (y ^ (x | ~z))
+
+/* This is the central step in the MD5 algorithm. */
+#define MD5STEP(f, w, x, y, z, data, s) \
+ ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
+
+/*
+ * The core of the MD5 algorithm, this alters an existing MD5 hash to
+ * reflect the addition of 16 longwords of new data. MD5Update blocks
+ * the data and converts bytes into longwords for this routine.
+ */
+void MD5Transform(__u32 buf[4], __u32 const in[16])
+{
+ register u32 a, b, c, d;
+
+ a = buf[0];
+ b = buf[1];
+ c = buf[2];
+ d = buf[3];
+
+ MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
+ MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
+ MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
+ MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
+ MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
+ MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
+ MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
+ MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
+ MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
+ MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
+ MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
+ MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
+ MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
+ MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
+ MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
+ MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
+
+ MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
+ MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
+ MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
+ MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
+ MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
+ MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
+ MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
+ MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
+ MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
+ MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
+ MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
+ MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
+ MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
+ MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
+ MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
+ MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
+
+ MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
+ MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
+ MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
+ MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
+ MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
+ MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
+ MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
+ MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
+ MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
+ MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
+ MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
+ MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
+ MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
+ MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
+ MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
+ MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
+
+ MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
+ MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
+ MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
+ MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
+ MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
+ MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
+ MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
+ MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
+ MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
+ MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
+ MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
+ MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
+ MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
+ MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
+ MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
+ MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
+
+ buf[0] += a;
+ buf[1] += b;
+ buf[2] += c;
+ buf[3] += d;
+}
+
+#ifdef CONFIG_MD5
+EXPORT_SYMBOL(MD5Init);
+EXPORT_SYMBOL(MD5Update);
+EXPORT_SYMBOL(MD5Final);
+EXPORT_SYMBOL(MD5Transform);
+#endif
+
Index: net/ipv6/Config.in
===================================================================
RCS file: /cvsroot/usagi/usagi-backport/linux24/net/ipv6/Config.in,v
retrieving revision 1.1.1.1
retrieving revision 1.1.1.1.50.1
diff -u -r1.1.1.1 -r1.1.1.1.50.1
--- net/ipv6/Config.in 20 Aug 2002 09:47:02 -0000 1.1.1.1
+++ net/ipv6/Config.in 24 Feb 2003 10:40:59 -0000 1.1.1.1.50.1
@@ -5,6 +5,8 @@
#bool ' IPv6: flow policy support' CONFIG_RT6_POLICY
#bool ' IPv6: firewall support' CONFIG_IPV6_FIREWALL

+bool ' IPv6: Privacy Extentions (RFC 3041) support' CONFIG_IPV6_PRIVACY
+
if [ "$CONFIG_NETFILTER" != "n" ]; then
source net/ipv6/netfilter/Config.in
fi
Index: net/ipv6/addrconf.c
===================================================================
RCS file: /cvsroot/usagi/usagi-backport/linux24/net/ipv6/addrconf.c,v
retrieving revision 1.1.1.4
retrieving revision 1.1.1.4.2.3
diff -u -r1.1.1.4 -r1.1.1.4.2.3
--- net/ipv6/addrconf.c 24 Feb 2003 09:47:55 -0000 1.1.1.4
+++ net/ipv6/addrconf.c 25 Feb 2003 07:45:16 -0000 1.1.1.4.2.3
@@ -28,6 +28,8 @@
* packets.
* YOSHIFUJI Hideaki @USAGI : improved accuracy of
* address validation timer.
+ * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
+ * support.
*/

#include <linux/config.h>
@@ -62,6 +64,11 @@
#include <linux/if_tunnel.h>
#include <linux/rtnetlink.h>

+#ifdef CONFIG_IPV6_PRIVACY
+#include <linux/random.h>
+#include <linux/md5.h>
+#endif
+
#include <asm/uaccess.h>

#define IPV6_MAX_ADDRESSES 16
@@ -83,6 +90,16 @@
int inet6_dev_count;
int inet6_ifa_count;

+#ifdef CONFIG_IPV6_PRIVACY
+static int __ipv6_regen_rndid(struct inet6_dev *idev);
+static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
+static void ipv6_regen_rndid(unsigned long data);
+
+static int desync_factor = MAX_DESYNC_FACTOR * HZ;
+#endif
+
+int ipv6_count_addresses(struct inet6_dev *idev);
+
/*
* Configured unicast address hash table
*/
@@ -119,6 +136,13 @@
MAX_RTR_SOLICITATIONS, /* router solicits */
RTR_SOLICITATION_INTERVAL, /* rtr solicit interval */
MAX_RTR_SOLICITATION_DELAY, /* rtr solicit delay */
+#ifdef CONFIG_IPV6_PRIVACY
+ .use_tempaddr = 1,
+ .temp_valid_lft = TEMP_VALID_LIFETIME,
+ .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
+ .regen_max_retry = REGEN_MAX_RETRY,
+ .max_desync_factor = MAX_DESYNC_FACTOR,
+#endif
};

static struct ipv6_devconf ipv6_devconf_dflt =
@@ -133,6 +157,13 @@
MAX_RTR_SOLICITATIONS, /* router solicits */
RTR_SOLICITATION_INTERVAL, /* rtr solicit interval */
MAX_RTR_SOLICITATION_DELAY, /* rtr solicit delay */
+#ifdef CONFIG_IPV6_PRIVACY
+ .use_tempaddr = 1,
+ .temp_valid_lft = TEMP_VALID_LIFETIME,
+ .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
+ .regen_max_retry = REGEN_MAX_RETRY,
+ .max_desync_factor = MAX_DESYNC_FACTOR,
+#endif
};

int ipv6_addr_type(struct in6_addr *addr)
@@ -272,6 +303,24 @@
/* We refer to the device */
dev_hold(dev);

+#ifdef CONFIG_IPV6_PRIVACY
+ get_random_bytes(ndev->rndid, sizeof(ndev->rndid));
+ get_random_bytes(ndev->entropy, sizeof(ndev->entropy));
+ init_timer(&ndev->regen_timer);
+ ndev->regen_timer.function = ipv6_regen_rndid;
+ ndev->regen_timer.data = (unsigned long) ndev;
+ if ((dev->flags&IFF_LOOPBACK) ||
+ dev->type == ARPHRD_TUNNEL ||
+ dev->type == ARPHRD_SIT) {
+ printk(KERN_INFO
+ "Disabled Privacy Extensions on device %p(%s)\n",
+ dev, dev->name);
+ ndev->cnf.use_tempaddr = -1;
+ } else {
+ __ipv6_regen_rndid(ndev);
+ }
+#endif
+
write_lock_bh(&addrconf_lock);
dev->ip6_ptr = ndev;
/* One reference from device */
@@ -396,6 +445,18 @@
/* Add to inet6_dev unicast addr list. */
ifa->if_next = idev->addr_list;
idev->addr_list = ifa;
+
+#ifdef CONFIG_IPV6_PRIVACY
+ ifa->regen_count = 0;
+ if (ifa->flags&IFA_F_TEMPORARY) {
+ ifa->tmp_next = idev->tempaddr_list;
+ idev->tempaddr_list = ifa;
+ in6_ifa_hold(ifa);
+ } else {
+ ifa->tmp_next = NULL;
+ }
+#endif
+
in6_ifa_hold(ifa);
write_unlock_bh(&idev->lock);
read_unlock(&addrconf_lock);
@@ -417,6 +478,15 @@

ifp->dead = 1;

+#ifdef CONFIG_IPV6_PRIVACY
+ spin_lock_bh(&ifp->lock);
+ if (ifp->ifpub) {
+ __in6_ifa_put(ifp->ifpub);
+ ifp->ifpub = NULL;
+ }
+ spin_unlock_bh(&ifp->lock);
+#endif
+
write_lock_bh(&addrconf_hash_lock);
for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
ifap = &ifa->lst_next) {
@@ -430,6 +500,24 @@
write_unlock_bh(&addrconf_hash_lock);

write_lock_bh(&idev->lock);
+#ifdef CONFIG_IPV6_PRIVACY
+ if (ifp->flags&IFA_F_TEMPORARY) {
+ for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
+ ifap = &ifa->tmp_next) {
+ if (ifa == ifp) {
+ *ifap = ifa->tmp_next;
+ if (ifp->ifpub) {
+ __in6_ifa_put(ifp->ifpub);
+ ifp->ifpub = NULL;
+ }
+ __in6_ifa_put(ifp);
+ ifa->tmp_next = NULL;
+ break;
+ }
+ }
+ }
+#endif
+
for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;
ifap = &ifa->if_next) {
if (ifa == ifp) {
@@ -450,6 +538,96 @@
in6_ifa_put(ifp);
}

+#ifdef CONFIG_IPV6_PRIVACY
+static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
+{
+ struct inet6_dev *idev;
+ struct in6_addr addr, *tmpaddr;
+ unsigned long tmp_prefered_lft, tmp_valid_lft;
+ int tmp_plen;
+ int ret = 0;
+
+ if (ift) {
+ spin_lock_bh(&ift->lock);
+ memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
+ spin_unlock_bh(&ift->lock);
+ tmpaddr = &addr;
+ } else {
+ tmpaddr = NULL;
+ }
+retry:
+ spin_lock_bh(&ifp->lock);
+ in6_ifa_hold(ifp);
+ idev = ifp->idev;
+ in6_dev_hold(idev);
+ memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
+ write_lock(&idev->lock);
+ if (idev->cnf.use_tempaddr <= 0) {
+ write_unlock(&idev->lock);
+ spin_unlock_bh(&ifp->lock);
+ printk(KERN_INFO
+ "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
+ in6_dev_put(idev);
+ in6_ifa_put(ifp);
+ ret = -1;
+ goto out;
+ }
+ if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
+ idev->cnf.use_tempaddr = -1; /*XXX*/
+ write_unlock(&idev->lock);
+ spin_unlock_bh(&ifp->lock);
+ printk(KERN_WARNING
+ "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
+ in6_dev_put(idev);
+ in6_ifa_put(ifp);
+ ret = -1;
+ goto out;
+ }
+ if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
+ write_unlock(&idev->lock);
+ spin_unlock_bh(&ifp->lock);
+ printk(KERN_WARNING
+ "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
+ in6_dev_put(idev);
+ in6_ifa_put(ifp);
+ ret = -1;
+ goto out;
+ }
+ memcpy(&addr.s6_addr[8], idev->rndid, 8);
+ tmp_valid_lft = min_t(__u32,
+ ifp->valid_lft,
+ idev->cnf.temp_valid_lft);
+ tmp_prefered_lft = min_t(__u32,
+ ifp->prefered_lft,
+ idev->cnf.temp_prefered_lft - desync_factor / HZ);
+ tmp_plen = ifp->prefix_len;
+ write_unlock(&idev->lock);
+ spin_unlock_bh(&ifp->lock);
+ ift = ipv6_count_addresses(idev) < IPV6_MAX_ADDRESSES ?
+ ipv6_add_addr(idev, &addr, tmp_plen,
+ ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : 0;
+ if (!ift) {
+ in6_dev_put(idev);
+ in6_ifa_put(ifp);
+ printk(KERN_INFO
+ "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
+ tmpaddr = &addr;
+ goto retry;
+ }
+ spin_lock_bh(&ift->lock);
+ ift->ifpub = ifp;
+ ift->valid_lft = tmp_valid_lft;
+ ift->prefered_lft = tmp_prefered_lft;
+ ift->tstamp = ifp->tstamp;
+ spin_unlock_bh(&ift->lock);
+ addrconf_dad_start(ift);
+ in6_ifa_put(ift);
+ in6_dev_put(idev);
+out:
+ return ret;
+}
+#endif
+
/*
* Choose an apropriate source address
* should do:
@@ -458,6 +636,22 @@
* an address of the attached interface
* iii) don't use deprecated addresses
*/
+static int inline ipv6_saddr_pref(const struct inet6_ifaddr *ifp, u8 invpref)
+{
+ int pref;
+ pref = ifp->flags&IFA_F_DEPRECATED ? 0 : 2;
+#ifdef CONFIG_IPV6_PRIVACY
+ pref |= (ifp->flags^invpref)&IFA_F_TEMPORARY ? 0 : 1;
+#endif
+ return pref;
+}
+
+#ifdef CONFIG_IPV6_PRIVACY
+#define IPV6_GET_SADDR_MAXSCORE(score) ((score) == 3)
+#else
+#define IPV6_GET_SADDR_MAXSCORE(score) (score)
+#endif
+
int ipv6_get_saddr(struct dst_entry *dst,
struct in6_addr *daddr, struct in6_addr *saddr)
{
@@ -468,6 +662,7 @@
struct inet6_dev *idev;
struct rt6_info *rt;
int err;
+ int hiscore = -1, score;

rt = (struct rt6_info *) dst;
if (rt)
@@ -497,17 +692,27 @@
read_lock_bh(&idev->lock);
for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
if (ifp->scope == scope) {
- if (!(ifp->flags & (IFA_F_DEPRECATED|IFA_F_TENTATIVE))) {
- in6_ifa_hold(ifp);
+ if (ifp->flags&IFA_F_TENTATIVE)
+ continue;
+#ifdef CONFIG_IPV6_PRIVACY
+ score = ipv6_saddr_pref(ifp, idev->cnf.use_tempaddr > 1 ? IFA_F_TEMPORARY : 0);
+#else
+ score = ipv6_saddr_pref(ifp, 0);
+#endif
+ if (score <= hiscore)
+ continue;
+
+ if (match)
+ in6_ifa_put(match);
+ match = ifp;
+ hiscore = score;
+ in6_ifa_hold(ifp);
+
+ if (IPV6_GET_SADDR_MAXSCORE(score)) {
read_unlock_bh(&idev->lock);
read_unlock(&addrconf_lock);
goto out;
}
-
- if (!match && !(ifp->flags & IFA_F_TENTATIVE)) {
- match = ifp;
- in6_ifa_hold(ifp);
- }
}
}
read_unlock_bh(&idev->lock);
@@ -530,16 +735,26 @@
read_lock_bh(&idev->lock);
for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
if (ifp->scope == scope) {
- if (!(ifp->flags&(IFA_F_DEPRECATED|IFA_F_TENTATIVE))) {
- in6_ifa_hold(ifp);
+ if (ifp->flags&IFA_F_TENTATIVE)
+ continue;
+#ifdef CONFIG_IPV6_PRIVACY
+ score = ipv6_saddr_pref(ifp, idev->cnf.use_tempaddr > 1 ? IFA_F_TEMPORARY : 0);
+#else
+ score = ipv6_saddr_pref(ifp, 0);
+#endif
+ if (score <= hiscore)
+ continue;
+
+ if (match)
+ in6_ifa_put(match);
+ match = ifp;
+ hiscore = score;
+ in6_ifa_hold(ifp);
+
+ if (IPV6_GET_SADDR_MAXSCORE(score)) {
read_unlock_bh(&idev->lock);
goto out_unlock_base;
}
-
- if (!match && !(ifp->flags&IFA_F_TENTATIVE)) {
- match = ifp;
- in6_ifa_hold(ifp);
- }
}
}
read_unlock_bh(&idev->lock);
@@ -551,19 +766,12 @@
read_unlock(&dev_base_lock);

out:
- if (ifp == NULL) {
- ifp = match;
- match = NULL;
- }
-
err = -EADDRNOTAVAIL;
- if (ifp) {
- ipv6_addr_copy(saddr, &ifp->addr);
+ if (match) {
+ ipv6_addr_copy(saddr, &match->addr);
err = 0;
- in6_ifa_put(ifp);
- }
- if (match)
in6_ifa_put(match);
+ }

return err;
}
@@ -653,6 +861,21 @@
ifp->flags |= IFA_F_TENTATIVE;
spin_unlock_bh(&ifp->lock);
in6_ifa_put(ifp);
+#ifdef CONFIG_IPV6_PRIVACY
+ } else if (ifp->flags&IFA_F_TEMPORARY) {
+ struct inet6_ifaddr *ifpub;
+ spin_lock_bh(&ifp->lock);
+ ifpub = ifp->ifpub;
+ if (ifpub) {
+ in6_ifa_hold(ifpub);
+ spin_unlock_bh(&ifp->lock);
+ ipv6_create_tempaddr(ifpub, ifp);
+ in6_ifa_put(ifpub);
+ } else {
+ spin_unlock_bh(&ifp->lock);
+ }
+ ipv6_del_addr(ifp);
+#endif
} else
ipv6_del_addr(ifp);
}
@@ -718,6 +941,91 @@
return err;
}

+#ifdef CONFIG_IPV6_PRIVACY
+/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
+static int __ipv6_regen_rndid(struct inet6_dev *idev)
+{
+ struct net_device *dev;
+ u8 eui64[8];
+ u8 digest[16];
+ MD5_CTX ctx;
+
+ if (!del_timer(&idev->regen_timer))
+ in6_dev_hold(idev);
+
+ dev = idev->dev;
+
+ if (ipv6_generate_eui64(eui64, dev)) {
+ printk(KERN_INFO
+ "__ipv6_regen_rndid(idev=%p): cannot get EUI64 identifier; use random bytes.\n",
+ idev);
+ get_random_bytes(eui64, sizeof(eui64));
+ }
+regen:
+ MD5Init(&ctx);
+ MD5Update(&ctx, idev->entropy, 8);
+ MD5Update(&ctx, eui64, 8);
+ MD5Final(digest, &ctx);
+ memcpy(idev->rndid, &digest[0], 8);
+ idev->rndid[0] &= ~0x02;
+ memcpy(idev->entropy, &digest[8], 8);
+
+ /*
+ * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
+ * check if generated address is not inappropriate
+ *
+ * - Reserved subnet anycast (RFC 2526)
+ * 11111101 11....11 1xxxxxxx
+ * - ISATAP (draft-ietf-ngtrans-isatap-01.txt) 4.3
+ * 00-00-5E-FE-xx-xx-xx-xx
+ * - value 0
+ * - XXX: already assigned to an address on the device
+ */
+ if (idev->rndid[0] == 0xfd &&
+ (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) &&
+ (idev->rndid[7]&0x80))
+ goto regen;
+ if ((idev->rndid[0]|idev->rndid[1]) == 0) {
+ if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
+ goto regen;
+ if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
+ goto regen;
+ }
+
+ if (time_before(idev->regen_timer.expires, jiffies)) {
+ idev->regen_timer.expires = 0;
+ printk(KERN_WARNING
+ "__ipv6_regen_rndid(): too short regeneration interval; timer diabled for %s.\n",
+ idev->dev->name);
+ in6_dev_put(idev);
+ return -1;
+ }
+
+ add_timer(&idev->regen_timer);
+ return 0;
+}
+
+static void ipv6_regen_rndid(unsigned long data)
+{
+ struct inet6_dev *idev = (struct inet6_dev *) data;
+
+ read_lock_bh(&addrconf_lock);
+ write_lock_bh(&idev->lock);
+ if (!idev->dead)
+ __ipv6_regen_rndid(idev);
+ write_unlock_bh(&idev->lock);
+ read_unlock_bh(&addrconf_lock);
+}
+
+static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
+ int ret = 0;
+
+ if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
+ ret = __ipv6_regen_rndid(idev);
+ return ret;
+}
+#endif
+
/*
* Add prefix route.
*/
@@ -889,6 +1197,7 @@
struct inet6_ifaddr * ifp;
struct in6_addr addr;
int plen;
+ int create = 0;

plen = pinfo->prefix_len >> 3;

@@ -924,6 +1233,7 @@
return;
}

+ create = 1;
addrconf_dad_start(ifp);
}

@@ -934,6 +1244,9 @@

if (ifp) {
int flags;
+#ifdef CONFIG_IPV6_PRIVACY
+ struct inet6_ifaddr *ift;
+#endif

spin_lock(&ifp->lock);
ifp->valid_lft = valid_lft;
@@ -946,6 +1259,42 @@
if (!(flags&IFA_F_TENTATIVE))
ipv6_ifa_notify((flags&IFA_F_DEPRECATED) ?
0 : RTM_NEWADDR, ifp);
+
+#ifdef CONFIG_IPV6_PRIVACY
+ read_lock_bh(&in6_dev->lock);
+ /* update all temporary addresses in the list */
+ for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
+ /*
+ * When adjusting the lifetimes of an existing
+ * temporary address, only lower the lifetimes.
+ * Implementations must not increase the
+ * lifetimes of an existing temporary address
+ * when processing a Prefix Information Option.
+ */
+ spin_lock(&ift->lock);
+ flags = ift->flags;
+ if (ift->valid_lft > valid_lft &&
+ ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
+ ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
+ if (ift->prefered_lft > prefered_lft &&
+ ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
+ ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
+ spin_unlock(&ift->lock);
+ if (!(flags&IFA_F_TENTATIVE))
+ ipv6_ifa_notify(0, ift);
+ }
+
+ if (create && in6_dev->cnf.use_tempaddr > 0) {
+ /*
+ * When a new public address is created as described in [ADDRCONF],
+ * also create a new temporary address.
+ */
+ read_unlock_bh(&in6_dev->lock);
+ ipv6_create_tempaddr(ifp, NULL);
+ } else {
+ read_unlock_bh(&in6_dev->lock);
+ }
+#endif
in6_ifa_put(ifp);
addrconf_verify(0);
}
@@ -1643,6 +1992,9 @@
write_lock(&addrconf_hash_lock);
for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
unsigned long age;
+#ifdef CONFIG_IPV6_PRIVACY
+ unsigned long regen_advance;
+#endif

if (ifp->flags & IFA_F_PERMANENT)
continue;
@@ -1650,6 +2002,12 @@
spin_lock(&ifp->lock);
age = (now - ifp->tstamp) / HZ;

+#ifdef CONFIG_IPV6_PRIVACY
+ regen_advance = ifp->idev->cnf.regen_max_retry *
+ ifp->idev->cnf.dad_transmits *
+ ifp->idev->nd_parms->retrans_time / HZ;
+#endif
+
if (age >= ifp->valid_lft) {
spin_unlock(&ifp->lock);
in6_ifa_hold(ifp);
@@ -1678,6 +2036,28 @@
in6_ifa_put(ifp);
goto restart;
}
+#ifdef CONFIG_IPV6_PRIVACY
+ } else if ((ifp->flags&IFA_F_TEMPORARY) &&
+ !(ifp->flags&IFA_F_TENTATIVE)) {
+ if (age >= ifp->prefered_lft - regen_advance) {
+ struct inet6_ifaddr *ifpub = ifp->ifpub;
+ if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
+ next = ifp->tstamp + ifp->prefered_lft * HZ;
+ if (!ifp->regen_count && ifpub) {
+ ifp->regen_count++;
+ in6_ifa_hold(ifp);
+ in6_ifa_hold(ifpub);
+ spin_unlock(&ifp->lock);
+ write_unlock(&addrconf_hash_lock);
+ ipv6_create_tempaddr(ifpub, ifp);
+ in6_ifa_put(ifpub);
+ in6_ifa_put(ifp);
+ goto restart;
+ }
+ } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
+ next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
+ spin_unlock(&ifp->lock);
+#endif
} else {
/* ifp->prefered_lft <= ifp->valid_lft */
if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
@@ -1910,7 +2290,7 @@
static struct addrconf_sysctl_table
{
struct ctl_table_header *sysctl_header;
- ctl_table addrconf_vars[11];
+ ctl_table addrconf_vars[16];
ctl_table addrconf_dev[2];
ctl_table addrconf_conf_dir[2];
ctl_table addrconf_proto_dir[2];
@@ -1957,6 +2337,28 @@
&ipv6_devconf.rtr_solicit_delay, sizeof(int), 0644, NULL,
&proc_dointvec_jiffies},

+#ifdef CONFIG_IPV6_PRIVACY
+ {NET_IPV6_USE_TEMPADDR, "use_tempaddr",
+ &ipv6_devconf.use_tempaddr, sizeof(int), 0644, NULL,
+ &proc_dointvec},
+
+ {NET_IPV6_TEMP_VALID_LFT, "temp_valid_lft",
+ &ipv6_devconf.temp_valid_lft, sizeof(int), 0644, NULL,
+ &proc_dointvec},
+
+ {NET_IPV6_TEMP_PREFERED_LFT, "temp_prefered_lft",
+ &ipv6_devconf.temp_prefered_lft, sizeof(int), 0644, NULL,
+ &proc_dointvec},
+
+ {NET_IPV6_REGEN_MAX_RETRY, "regen_max_retry",
+ &ipv6_devconf.regen_max_retry, sizeof(int), 0644, NULL,
+ &proc_dointvec},
+
+ {NET_IPV6_MAX_DESYNC_FACTOR, "max_desync_factor",
+ &ipv6_devconf.max_desync_factor, sizeof(int), 0644, NULL,
+ &proc_dointvec},
+#endif
+
{0}},

{{NET_PROTO_CONF_ALL, "all", NULL, 0, 0555, addrconf_sysctl.addrconf_vars},{0}},
@@ -1975,7 +2377,7 @@
if (t == NULL)
return;
memcpy(t, &addrconf_sysctl, sizeof(*t));
- for (i=0; i<sizeof(t->addrconf_vars)/sizeof(t->addrconf_vars[0])-1; i++) {
+ for (i=0; t->addrconf_vars[i].data; i++) {
t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
t->addrconf_vars[i].de = NULL;
}
--
Hideaki YOSHIFUJI @ USAGI Project <yoshfuji@linux-ipv6.org>
GPG FP: 9022 65EB 1ECF 3AD1 0BDF 80D8 4807 F894 E062 0EEA
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