[UNIKRAFT PATCH 1/1] Add in6addr_loopback

[Vlad-Andrei Badoiu <vlad_andrei.badoiu@xxxxxx>]

Bind9 uses the in6addr_loopback symbol. We add this
symbol in a separate c file, in6addr_loopback.c.

Signed-off-by: Vlad-Andrei Badoiu <vlad_andrei.badoiu@xxxxxx>
---
 Makefile.uk          | 1 +
 in6addr_loopback.c   | 3 +++
 include/netinet/in.h | 2 ++
 3 files changed, 6 insertions(+)
 create mode 100644 in6addr_loopback.c

diff --git a/Makefile.uk b/Makefile.uk
index d3c6c9c..be05dc5 100644
--- a/Makefile.uk
+++ b/Makefile.uk
@@ -128,6 +128,7 @@ LIBLWIP_SRCS-$(CONFIG_LWIP_SOCKET) += 
$(LIBLWIP_EXTRACTED)/api/sockets.c
 LIBLWIP_SRCS-y += $(LIBLWIP_EXTRACTED)/netif/ethernet.c
 LIBLWIP_SRCS-$(CONFIG_LWIP_UKNETDEV) += $(LIBLWIP_BASE)/netbuf.c|unikraft
 LIBLWIP_SRCS-$(CONFIG_LWIP_UKNETDEV) += $(LIBLWIP_BASE)/uknetdev.c|unikraft
+LIBLWIP_SRCS-$(CONFIG_LWIP_IPV6) += $(LIBLWIP_BASE)/in6addr_loopback.c|unikraft
 
 
################################################################################
 # IPv4
diff --git a/in6addr_loopback.c b/in6addr_loopback.c
new file mode 100644
index 0000000..b96005b
--- /dev/null
+++ b/in6addr_loopback.c
@@ -0,0 +1,3 @@
+#include <netinet/in.h>
+
+const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
diff --git a/include/netinet/in.h b/include/netinet/in.h
index 00d7fd4..aea7490 100644
--- a/include/netinet/in.h
+++ b/include/netinet/in.h
@@ -41,6 +41,8 @@ struct group_source_req {
 
 
 #ifdef CONFIG_LWIP_IPV6
+extern const struct in6_addr in6addr_any, in6addr_loopback;
+
 #define IPV6_ADDRFORM           1
 #define IPV6_2292PKTINFO        2
 #define IPV6_2292HOPOPTS        3
-- 
2.20.1