[BZ #2693]

	* inet/Makefile (routines): Add inet6_opt and inet6_rth.
	* inet/Versions (libc, GLIBC_2.5): Add inet6_opt_init,
	inet6_opt_append, inet6_opt_finish, inet6_opt_set_val, inet6_opt_next,
	inet6_opt_find, inet6_opt_get_val, inet6_rth_space, inet6_rth_init,
	inet6_rth_add, inet6_rth_reverse, inet6_rth_segments,
	and inet6_rth_getaddr.
	* inet/netinet/ip6.h (struct ip6_rthdr0): Make ip6r0_addr a flexible
	array.
	* inet/netinet/in.h (struct ip6_mtuinfo): Define.
	Mark inet6_option_* interfaces as deprecated.
	Declare inet6_opt_init, inet6_opt_append, inet6_opt_finish,
	inet6_opt_set_val, inet6_opt_next, inet6_opt_find, inet6_opt_get_val,
	inet6_rth_space, inet6_rth_init, inet6_rth_add, inet6_rth_reverse,
	inet6_rth_segments, and inet6_rth_getaddr.
	* inet/inet6_opt.c: New file.
	* inet/inet6_rth.c: New file.

	* inet/netinet/icmp6.h: Pretty printing.

3 files changed, 77 insertions, 35 deletions

diff --git a/inet/netinet/icmp6.h b/inet/netinet/icmp6.h
index c5138a39c9..0cb1aa6a6c 100644
--- a/inet/netinet/icmp6.h
+++ b/inet/netinet/icmp6.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991,92,93,94,95,96,97,2000 Free Software Foundation, Inc.
+/* Copyright (C) 1991-1997,2000,2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -191,13 +191,13 @@ struct nd_opt_hdr             /* Neighbor discovery option header */
     /* followed by option specific data */
   };
 
-#define  ND_OPT_SOURCE_LINKADDR       1
-#define  ND_OPT_TARGET_LINKADDR       2
-#define  ND_OPT_PREFIX_INFORMATION    3
-#define  ND_OPT_REDIRECTED_HEADER     4
-#define  ND_OPT_MTU                   5
-#define  ND_OPT_RTR_ADV_INTERVAL      7
-#define  ND_OPT_HOME_AGENT_INFO       8
+#define ND_OPT_SOURCE_LINKADDR		1
+#define ND_OPT_TARGET_LINKADDR		2
+#define ND_OPT_PREFIX_INFORMATION	3
+#define ND_OPT_REDIRECTED_HEADER	4
+#define ND_OPT_MTU			5
+#define ND_OPT_RTR_ADV_INTERVAL		7
+#define ND_OPT_HOME_AGENT_INFO		8
 
 struct nd_opt_prefix_info     /* prefix information */
   {
@@ -211,9 +211,9 @@ struct nd_opt_prefix_info     /* prefix information */
     struct in6_addr  nd_opt_pi_prefix;
   };
 
-#define ND_OPT_PI_FLAG_ONLINK        0x80
-#define ND_OPT_PI_FLAG_AUTO          0x40
-#define ND_OPT_PI_FLAG_RADDR         0x20
+#define ND_OPT_PI_FLAG_ONLINK	0x80
+#define ND_OPT_PI_FLAG_AUTO	0x40
+#define ND_OPT_PI_FLAG_RADDR	0x20
 
 struct nd_opt_rd_hdr          /* redirected header */
   {
@@ -300,11 +300,11 @@ struct rr_pco_use      /* use prefix part */
 #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO    0x10
 
 #if BYTE_ORDER == BIG_ENDIAN
-# define ICMP6_RR_PCOUSE_DECRVLTIME      0x80000000
-# define ICMP6_RR_PCOUSE_DECRPLTIME      0x40000000
+# define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80000000
+# define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40000000
 #elif BYTE_ORDER == LITTLE_ENDIAN
-# define ICMP6_RR_PCOUSE_DECRVLTIME      0x80
-# define ICMP6_RR_PCOUSE_DECRPLTIME      0x40
+# define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80
+# define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40
 #endif
 
 struct rr_result       /* router renumbering result message */
diff --git a/inet/netinet/in.h b/inet/netinet/in.h
index 8898be3664..4fdc0fadf1 100644
--- a/inet/netinet/in.h
+++ b/inet/netinet/in.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991-2001, 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2001, 2003, 2004, 2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -455,25 +455,66 @@ extern int bindresvport6 (int __sockfd, struct sockaddr_in6 *__sock_in)
 /* IPv6 packet information.  */
 struct in6_pktinfo
   {
-    struct in6_addr	ipi6_addr;    /* src/dst IPv6 address */
-    unsigned int	ipi6_ifindex; /* send/recv interface index */
+    struct in6_addr ipi6_addr;	/* src/dst IPv6 address */
+    unsigned int ipi6_ifindex;	/* send/recv interface index */
+  };
+
+/* IPv6 MTU information.  */
+struct ip6_mtuinfo
+  {
+    struct sockaddr_in6 ip6m_addr; /* dst address including zone ID */
+    uint32_t ip6m_mtu;		   /* path MTU in host byte order */
   };
 
 
 #ifdef __USE_GNU
-/* Hop-by-Hop and Destination Options Processing.  */
-extern int inet6_option_space (int __nbytes) __THROW;
+/* Obsolete hop-by-hop and Destination Options Processing (RFC 2292).  */
+extern int inet6_option_space (int __nbytes)
+     __THROW __attribute_deprecated__;
 extern int inet6_option_init (void *__bp, struct cmsghdr **__cmsgp,
-			      int __type) __THROW;
+			      int __type) __THROW __attribute_deprecated__;
 extern int inet6_option_append (struct cmsghdr *__cmsg,
 				__const uint8_t *__typep, int __multx,
-				int __plusy) __THROW;
+				int __plusy) __THROW __attribute_deprecated__;
 extern uint8_t *inet6_option_alloc (struct cmsghdr *__cmsg, int __datalen,
-				    int __multx, int __plusy) __THROW;
+				    int __multx, int __plusy)
+     __THROW __attribute_deprecated__;
 extern int inet6_option_next (__const struct cmsghdr *__cmsg,
-			      uint8_t **__tptrp) __THROW;
+			      uint8_t **__tptrp)
+     __THROW __attribute_deprecated__;
 extern int inet6_option_find (__const struct cmsghdr *__cmsg,
-			      uint8_t **__tptrp, int __type) __THROW;
+			      uint8_t **__tptrp, int __type)
+     __THROW __attribute_deprecated__;
+
+
+/* Hop-by-Hop and Destination Options Processing (RFC 3542).  */
+extern int inet6_opt_init (void *__extbuf, socklen_t __extlen) __THROW;
+extern int inet6_opt_append (void *__extbuf, socklen_t __extlen, int __offset,
+			     uint8_t __type, socklen_t __len, uint8_t __align,
+			     void **__databufp) __THROW;
+extern int inet6_opt_finish (void *__extbuf, socklen_t __extlen, int __offset)
+     __THROW;
+extern int inet6_opt_set_val (void *__databuf, int __offset, void *__val,
+			      socklen_t __vallen) __THROW;
+extern int inet6_opt_next (void *__extbuf, socklen_t __extlen, int __offset,
+			   uint8_t *__typep, socklen_t *__lenp,
+			   void **__databufp) __THROW;
+extern int inet6_opt_find (void *__extbuf, socklen_t __extlen, int __offset,
+			   uint8_t __type, socklen_t *__lenp,
+			   void **__databufp) __THROW;
+extern int inet6_opt_get_val (void *__databuf, int __offset, void *__val,
+			      socklen_t __vallen) __THROW;
+
+
+/* Routing Header Option (RFC 3542).  */
+extern socklen_t inet6_rth_space (int __type, int __segments) __THROW;
+extern void *inet6_rth_init (void *__bp, socklen_t __bp_len, int __type,
+			     int __segments) __THROW;
+extern int inet6_rth_add (void *__bp, __const struct in6_addr *__addr) __THROW;
+extern int inet6_rth_reverse (__const void *__in, void *__out) __THROW;
+extern int inet6_rth_segments (__const void *__bp) __THROW;
+extern struct in6_addr *inet6_rth_getaddr (__const void *__bp, int __index)
+     __THROW;
 
 
 /* Multicast source filter support.  */
diff --git a/inet/netinet/ip6.h b/inet/netinet/ip6.h
index 0ad62f8980..bef2af2f5a 100644
--- a/inet/netinet/ip6.h
+++ b/inet/netinet/ip6.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991-1997, 2001, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 1991-1997, 2001, 2003, 2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -89,7 +89,8 @@ struct ip6_rthdr0
     uint8_t  ip6r0_segleft;	/* segments left */
     uint8_t  ip6r0_reserved;	/* reserved field */
     uint8_t  ip6r0_slmap[3];	/* strict/loose bit map */
-    struct in6_addr  ip6r0_addr[1];  /* up to 23 addresses */
+    /* followed by up to 127 struct in6_addr */
+    struct in6_addr ip6r0_addr[0];
   };
 
 /* Fragment header */
@@ -101,14 +102,14 @@ struct ip6_frag
     uint32_t  ip6f_ident;	/* identification */
   };
 
-#if     BYTE_ORDER == BIG_ENDIAN
-#define IP6F_OFF_MASK       0xfff8  /* mask out offset from _offlg */
-#define IP6F_RESERVED_MASK  0x0006  /* reserved bits in ip6f_offlg */
-#define IP6F_MORE_FRAG      0x0001  /* more-fragments flag */
+#if BYTE_ORDER == BIG_ENDIAN
+# define IP6F_OFF_MASK       0xfff8  /* mask out offset from _offlg */
+# define IP6F_RESERVED_MASK  0x0006  /* reserved bits in ip6f_offlg */
+# define IP6F_MORE_FRAG      0x0001  /* more-fragments flag */
 #else   /* BYTE_ORDER == LITTLE_ENDIAN */
-#define IP6F_OFF_MASK       0xf8ff  /* mask out offset from _offlg */
-#define IP6F_RESERVED_MASK  0x0600  /* reserved bits in ip6f_offlg */
-#define IP6F_MORE_FRAG      0x0100  /* more-fragments flag */
+# define IP6F_OFF_MASK       0xf8ff  /* mask out offset from _offlg */
+# define IP6F_RESERVED_MASK  0x0600  /* reserved bits in ip6f_offlg */
+# define IP6F_MORE_FRAG      0x0100  /* more-fragments flag */
 #endif
 
 /* IPv6 options */
@@ -175,7 +176,7 @@ struct ip6_opt_router
   };
 
 /* Router alert values (in network byte order) */
-#if     BYTE_ORDER == BIG_ENDIAN
+#if BYTE_ORDER == BIG_ENDIAN
 # define IP6_ALERT_MLD	0x0000
 # define IP6_ALERT_RSVP	0x0001
 # define IP6_ALERT_AN	0x0002