Basic support for IPv6. The system-dependent part doesn't work yet,

but the core routines are there and seem to be working.

   o  lib/ipv6.[ch] written
   o  Lexical analyser recognizes IPv6 addresses and when in IPv6
      mode, treats pure IPv4 addresses as router IDs.
   o  Router ID must be configured manually on IPv6 systems.
   o  Added SCOPE_ORGANIZATION for org-scoped IPv6 multicasts.
   o  Fixed few places where ipa_(hton|ntoh) was called as a function
      returning converted address.

3 files changed, 17 insertions, 9 deletions

diff --git a/sysdep/cf/linux-v6.h b/sysdep/cf/linux-v6.h
index 69ab0f8..ef52ee4 100644
--- a/sysdep/cf/linux-v6.h
+++ b/sysdep/cf/linux-v6.h
@@ -8,9 +8,16 @@
 
 #define IPV6
 
-#define CONFIG_TOS
 #define CONFIG_AUTO_ROUTES
 #define CONFIG_ALL_MULTICAST
+#define CONFIG_SELF_CONSCIOUS
+
+/*
+ *  Netlink supports multiple tables, but kernel IPv6 code doesn't, so we
+ *  treat it as a multiple table system with number of tables set to 1.
+ */
+#define CONFIG_MULTIPLE_TABLES
+#define CONFIG_ALL_TABLES_AT_ONCE
 
 /*
 Link: sysdep/linux/netlink
diff --git a/sysdep/linux/netlink/netlink.c b/sysdep/linux/netlink/netlink.c
index 6682dbc..f71f1f5 100644
--- a/sysdep/linux/netlink/netlink.c
+++ b/sysdep/linux/netlink/netlink.c
@@ -242,7 +242,7 @@ nl_add_attr_ipa(struct nlmsghdr *h, unsigned maxsize, int code, ip_addr ipa)
   a = (struct rtattr *)((char *)h + NLMSG_ALIGN(h->nlmsg_len));
   a->rta_type = code;
   a->rta_len = len;
-  ipa = ipa_hton(ipa);
+  ipa_hton(ipa);
   memcpy(RTA_DATA(a), &ipa, sizeof(ipa));
   h->nlmsg_len = NLMSG_ALIGN(h->nlmsg_len) + len;
 }
@@ -351,17 +351,18 @@ nl_parse_addr(struct nlmsghdr *h)
   if (i->ifa_flags & IFA_F_SECONDARY)
     ifa.flags |= IA_SECONDARY;
   memcpy(&ifa.ip, RTA_DATA(a[IFA_LOCAL]), sizeof(ifa.ip));
-  ifa.ip = ipa_ntoh(ifa.ip);
+  ipa_ntoh(ifa.ip);
   ifa.pxlen = i->ifa_prefixlen;
   if (ifi->flags & IF_UNNUMBERED)
     {
       memcpy(&ifa.opposite, RTA_DATA(a[IFA_ADDRESS]), sizeof(ifa.opposite));
-      ifa.opposite = ifa.brd = ipa_ntoh(ifa.opposite);
+      ipa_ntoh(ifa.opposite);
+      ifa.brd = ifa.opposite;
     }
   else if ((ifi->flags & IF_BROADCAST) && a[IFA_BROADCAST])
     {
       memcpy(&ifa.brd, RTA_DATA(a[IFA_BROADCAST]), sizeof(ifa.brd));
-      ifa.brd = ipa_ntoh(ifa.brd);
+      ipa_ntoh(ifa.brd);
     }
   /* else a NBMA link */
   ifa.prefix = ipa_and(ifa.ip, ipa_mkmask(ifa.pxlen));
@@ -575,7 +576,7 @@ nl_parse_route(struct nlmsghdr *h, int scan)
   if (a[RTA_DST])
     {
       memcpy(&dst, RTA_DATA(a[RTA_DST]), sizeof(dst));
-      dst = ipa_ntoh(dst);
+      ipa_ntoh(dst);
     }
   else
     dst = IPA_NONE;
@@ -630,7 +631,7 @@ nl_parse_route(struct nlmsghdr *h, int scan)
 	  neighbor *ng;
 	  ra.dest = RTD_ROUTER;
 	  memcpy(&ra.gw, RTA_DATA(a[RTA_GATEWAY]), sizeof(ra.gw));
-	  ra.gw = ipa_ntoh(ra.gw);
+	  ipa_ntoh(ra.gw);
 	  ng = neigh_find(&p->p, &ra.gw, 0);
 	  if (ng)
 	    ra.iface = ng->iface;
diff --git a/sysdep/unix/io.c b/sysdep/unix/io.c
index 39cf200..3e070fa 100644
--- a/sysdep/unix/io.c
+++ b/sysdep/unix/io.c
@@ -314,7 +314,7 @@ sk_new(pool *p)
 static inline void
 set_inaddr(struct in_addr *ia, ip_addr a)
 {
-  a = ipa_hton(a);
+  ipa_hton(a);
   memcpy(&ia->s_addr, &a, sizeof(a));
 }
 
@@ -334,7 +334,7 @@ get_sockaddr(struct sockaddr_in *sa, ip_addr *a, unsigned *port)
   if (port)
     *port = ntohs(sa->sin_port);
   memcpy(a, &sa->sin_addr.s_addr, sizeof(*a));
-  *a = ipa_ntoh(*a);
+  ipa_ntoh(*a);
 }
 
 static char *