Cleanup: Remove unused "ipv6_local_address".

This was originally used on the "clat" interface. That interface is not created
anymore (since the switch to using a raw socket). Note that the v6 address used
on the raw socket is a combination of the plat subnet plus a host ID, and not
this link-local address.

Also fixup default values to match clatd.conf values.

Change-Id: I3470a02e6798b65cae0f8d7f074ce51fb0647e6a

3 files changed, 3 insertions, 12 deletions

diff --git a/clatd.conf b/clatd.conf
index 0d4b79e..b17b862 100644
--- a/clatd.conf
+++ b/clatd.conf
@@ -5,9 +5,6 @@ ipv6_host_id ::464
 # ipv4 subnet for the local traffic to use.  This is a /32 host address
 ipv4_local_subnet 192.0.0.4
 
-# ipv6 extra link local address for the ip6 iface.
-ipv6_local_address fe80::c000:0004
-
 # get the plat_subnet from dns lookups (requires DNS64)
 plat_from_dns64 yes
 # hostname to use to lookup plat subnet. must contain only A records
diff --git a/config.c b/config.c
index 13889a0..623a1b0 100644
--- a/config.c
+++ b/config.c
@@ -196,7 +196,7 @@ void config_generate_local_ipv6_subnet(struct in6_addr *interface_ip) {
 int subnet_from_interface(cnode *root, const char *interface) {
   union anyip *interface_ip;
 
-  if(!config_item_ip6(root, "ipv6_host_id", "::200:5E10:0:0", &Global_Clatd_Config.ipv6_host_id))
+  if(!config_item_ip6(root, "ipv6_host_id", "::464", &Global_Clatd_Config.ipv6_host_id))
     return 0;
 
   interface_ip = getinterface_ip(interface, AF_INET6);
@@ -252,9 +252,6 @@ int read_config(const char *file, const char *uplink_interface, const char *plat
   if(!config_item_ip(root, "ipv4_local_subnet", DEFAULT_IPV4_LOCAL_SUBNET, &Global_Clatd_Config.ipv4_local_subnet))
     goto failed;
 
-  if(!config_item_ip6(root, "ipv6_local_address", DEFAULT_IPV6_LOCAL_ADDRESS, &Global_Clatd_Config.ipv6_local_address))
-    goto failed;
-
   if(plat_prefix) { // plat subnet is coming from the command line
     if(inet_pton(AF_INET6, plat_prefix, &Global_Clatd_Config.plat_subnet) <= 0) {
       logmsg(ANDROID_LOG_FATAL,"invalid IPv6 address specified for plat prefix: %s", plat_prefix);
@@ -295,7 +292,6 @@ void dump_config() {
 
   logmsg(ANDROID_LOG_DEBUG,"mtu = %d",Global_Clatd_Config.mtu);
   logmsg(ANDROID_LOG_DEBUG,"ipv4mtu = %d",Global_Clatd_Config.ipv4mtu);
-  logmsg(ANDROID_LOG_DEBUG,"ipv6_local_address = %s",inet_ntop(AF_INET6, &Global_Clatd_Config.ipv6_local_address, charbuffer, sizeof(charbuffer)));
   logmsg(ANDROID_LOG_DEBUG,"ipv6_local_subnet = %s",inet_ntop(AF_INET6, &Global_Clatd_Config.ipv6_local_subnet, charbuffer, sizeof(charbuffer)));
   logmsg(ANDROID_LOG_DEBUG,"ipv4_local_subnet = %s",inet_ntop(AF_INET, &Global_Clatd_Config.ipv4_local_subnet, charbuffer, sizeof(charbuffer)));
   logmsg(ANDROID_LOG_DEBUG,"plat_subnet = %s",inet_ntop(AF_INET6, &Global_Clatd_Config.plat_subnet, charbuffer, sizeof(charbuffer)));
diff --git a/config.h b/config.h
index fa47152..da7446e 100644
--- a/config.h
+++ b/config.h
@@ -21,14 +21,12 @@
 #include <netinet/in.h>
 #include <sys/system_properties.h>
 
-#define DEFAULT_IPV4_LOCAL_SUBNET "192.168.255.1"
-#define DEFAULT_IPV6_LOCAL_ADDRESS "fe80::c000:0004"
+#define DEFAULT_IPV4_LOCAL_SUBNET "192.0.0.4"
 
-#define DEFAULT_DNS64_DETECTION_HOSTNAME "ipv4.google.com"
+#define DEFAULT_DNS64_DETECTION_HOSTNAME "ipv4only.arpa"
 
 struct clat_config {
   int16_t mtu, ipv4mtu;
-  struct in6_addr ipv6_local_address;
   struct in6_addr ipv6_local_subnet;
   struct in6_addr ipv6_host_id;
   struct in_addr ipv4_local_subnet;