[SCTP/IPV6]: Move sockaddr storage and in6addr_{any,loopback} to generic places.

include/linux/in6.h

@@ -40,6 +40,15 @@ struct in6_addr
 #define s6_addr32		in6_u.u6_addr32
 };
 
+/* IPv6 Wildcard Address (::) and Loopback Address (::1) defined in RFC2553
+ * NOTE: Be aware the IN6ADDR_* constants and in6addr_* externals are defined
+ * in network byte order, not in host byte order as are the IPv4 equivalents
+ */
+extern const struct in6_addr in6addr_any;
+#define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }
+extern const struct in6_addr in6addr_loopback;
+#define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
+
 struct sockaddr_in6 {
 	unsigned short int	sin6_family;    /* AF_INET6 */
 	__u16			sin6_port;      /* Transport layer port # */

include/linux/socket.h

@@ -24,6 +24,21 @@ struct linger {
 	int		l_linger;	/* How long to linger for	*/
 };
 
+/*
+ * Desired design of maximum size and alignment (see RFC2553)
+ */
+#define _SS_MAXSIZE	128	/* Implementation specific max size */
+#define _SS_ALIGNSIZE	(__alignof__ (struct sockaddr *))
+				/* Implementation specific desired alignment */
+
+struct sockaddr_storage {
+	sa_family_t	ss_family;		/* address family */
+	/* Following field(s) are implementation specific */
+	char		__data[_SS_MAXSIZE - sizeof(sa_family_t)];
+				/* space to achieve desired size, */
+				/* _SS_MAXSIZE value minus size of ss_family */
+} __attribute__ ((aligned(_SS_ALIGNSIZE)));	/* force desired alignment */
+
 /*
  *	As we do 4.4BSD message passing we use a 4.4BSD message passing
  *	system, not 4.3. Thus msg_accrights(len) are now missing. They

include/net/sctp/structs.h

@@ -61,38 +61,6 @@
 #include <linux/workqueue.h>	/* We need tq_struct.    */
 #include <linux/sctp.h>         /* We need sctp* header structs.  */
 
-/*
- * This is (almost) a direct quote from RFC 2553.
- */
-
-/*
- * Desired design of maximum size and alignment
- */
-#define _SS_MAXSIZE    128		/* Implementation specific max size */
-#define _SS_ALIGNSIZE  (sizeof (__s64))
-				/* Implementation specific desired alignment */
-/*
- * Definitions used for sockaddr_storage structure paddings design.
- */
-#define _SS_PAD1SIZE   (_SS_ALIGNSIZE - sizeof (sa_family_t))
-#define _SS_PAD2SIZE   (_SS_MAXSIZE - (sizeof (sa_family_t)+ \
-                              _SS_PAD1SIZE + _SS_ALIGNSIZE))
-
-struct sockaddr_storage {
-	sa_family_t  __ss_family;		/* address family */
-	/* Following fields are implementation specific */
-	char      __ss_pad1[_SS_PAD1SIZE];
-				/* 6 byte pad, to make implementation */
-				/* specific pad up to alignment field that */
-				/* follows explicit in the data structure */
-	__s64   __ss_align;	/* field to force desired structure */
-				/* storage alignment */
-	char      __ss_pad2[_SS_PAD2SIZE];
-				/* 112 byte pad to achieve desired size, */
-				/* _SS_MAXSIZE value minus size of ss_family */
-				/* __ss_pad1, __ss_align fields is 112 */
-};
-
 /* A convenience structure for handling sockaddr structures.
  * We should wean ourselves off this.
  */

net/ipv6/addrconf.c

@@ -136,6 +136,10 @@ static struct ipv6_devconf ipv6_devconf_dflt =
 	MAX_RTR_SOLICITATION_DELAY,	/* rtr solicit delay	*/
 };
 
+/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
+const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
+const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
+
 int ipv6_addr_type(struct in6_addr *addr)
 {
 	u32 st;