Add IN6_IS_ADDR_* macros and other IPv6 stuff.

1 files changed, 80 insertions, 1 deletions

diff --git a/system/include/net/netinet/in.h b/system/include/net/netinet/in.h
index 569a56b0..394df678 100644
--- a/system/include/net/netinet/in.h
+++ b/system/include/net/netinet/in.h
@@ -7,6 +7,7 @@ extern "C" {
 #endif
 
 #include <arpa/inet.h>
+#include <stdint.h>
 
 enum {
     IPPROTO_IP = 0,
@@ -19,6 +20,7 @@ enum {
 };
 
 #define INET_ADDRSTRLEN 16
+#define INET6_ADDRSTRLEN 46
 
 #define INADDR_ANY 0
 
@@ -34,7 +36,14 @@ struct sockaddr_in {
 };
 
 struct in6_addr {
-  unsigned char s6_addr[16];
+  union {
+    uint8_t _s6_addr8[16];
+    uint16_t _s6_addr16[8];
+    uint32_t _s6_addr32[4];
+  } _u;
+#define s6_addr _u._s6_addr8
+#define s6_addr16 _u._s6_addr16
+#define s6_addr32 _u._s6_addr32
 };
 
 struct sockaddr_in6 {
@@ -70,6 +79,76 @@ struct ip_mreq {
 #define IP_MULTICAST_ALL 49
 #define IP_UNICAST_IF 50
 
+/*
+ * Tests for IPv6 address types
+ */
+
+#define	IN6_IS_ADDR_LINKLOCAL(addr) \
+       	(((addr)->s6_addr32[0] & htonl(0xffc00000)) == htonl(0xfe800000))
+
+#define	IN6_IS_ADDR_LOOPBACK(addr) \
+       	(((addr)->s6_addr32[0] == 0) && ((addr)->s6_addr32[1] == 0) && \
+	 ((addr)->s6_addr32[2] == 0) && ((addr)->s6_addr32[3] == htonl(1)))
+
+#define	IN6_IS_ADDR_MULTICAST(addr) \
+       	((addr)->s6_addr8[0] == 0xff)
+	
+#define	IN6_IS_ADDR_SITELOCAL(addr) \
+       	(((addr)->s6_addr32[0] & htonl(0xffc00000)) == htonl(0xfec00000))
+
+#define	IN6_IS_ADDR_UNSPECIFIED(addr) \
+       	(((addr)->s6_addr32[0] == 0) && ((addr)->s6_addr32[1] == 0) && \
+	 ((addr)->s6_addr32[2] == 0) && ((addr)->s6_addr32[3] == 0))
+
+#define	IN6_IS_ADDR_V4COMPAT(addr) \
+       	(((addr)->s6_addr32[0] == 0) && ((addr)->s6_addr32[1] == 0) && \
+	 ((addr)->s6_addr32[2] == 0) && ((addr)->s6_addr32[3] & ~htonl(1)))
+
+#define	IN6_IS_ADDR_V4MAPPED(addr) \
+       	(((addr)->s6_addr32[0] == 0) && ((addr)->s6_addr32[1] == 0) && \
+	 ((addr)->s6_addr32[2] == htonl(0xffff)))
+
+#define	IN6_ARE_ADDR_EQUAL(addr1, addr2) \
+       	(((addr1)->s6_addr32[0] == (addr2)->s6_addr32[0]) && \
+	 ((addr1)->s6_addr32[1] == (addr2)->s6_addr32[1]) && \
+	 ((addr1)->s6_addr32[2] == (addr2)->s6_addr32[2]) && \
+	 ((addr1)->s6_addr32[3] == (addr2)->s6_addr32[3]))
+
+/*
+ * IPv6 Multicast scoping.  The scope is stored
+ * in the bottom 4 bits of the second byte of the
+ * multicast address.
+ */
+		     /* 0x0 */	/* reserved */
+#define	IN6_NODE_LOCAL	0x1	/* node-local scope */
+#define	IN6_LINK_LOCAL	0x2	/* link-local scope */
+		     /* 0x3 */	/* (unassigned) */
+		     /* 0x4 */	/* (unassigned) */
+#define	IN6_SITE_LOCAL	0x5	/* site-local scope */
+		     /* 0x6 */	/* (unassigned) */
+		     /* 0x7 */	/* (unassigned) */
+#define	IN6_ORG_LOCAL	0x8	/* organization-local scope */
+		     /* 0x9 */	/* (unassigned) */
+		     /* 0xA */	/* (unassigned) */
+		     /* 0xB */	/* (unassigned) */
+		     /* 0xC */	/* (unassigned) */
+		     /* 0xD */	/* (unassigned) */
+#define	IN6_GLOBAL	0xE	/* global scope */
+		     /* 0xF */	/* reserved */
+
+#define	IN6_MSCOPE(addr)	((addr)->s6_addr8[1] & 0x0f)
+
+#define	IN6_IS_ADDR_MC_NODELOCAL(addr) \
+       	(IN6_IS_ADDR_MULTICAST(addr) && (IN6_MSCOPE(addr) == IN6_NODE_LOCAL))
+#define	IN6_IS_ADDR_MC_LINKLOCAL(addr) \
+       	(IN6_IS_ADDR_MULTICAST(addr) && (IN6_MSCOPE(addr) == IN6_LINK_LOCAL))
+#define	IN6_IS_ADDR_MC_SITELOCAL(addr) \
+       	(IN6_IS_ADDR_MULTICAST(addr) && (IN6_MSCOPE(addr) == IN6_SITE_LOCAL))
+#define	IN6_IS_ADDR_MC_ORGLOCAL(addr) \
+       	(IN6_IS_ADDR_MULTICAST(addr) && (IN6_MSCOPE(addr) == IN6_ORG_LOCAL))
+#define	IN6_IS_ADDR_MC_GLOBAL(addr) \
+       	(IN6_IS_ADDR_MULTICAST(addr) && (IN6_MSCOPE(addr) == IN6_GLOBAL))
+
 #ifdef __cplusplus
 }
 #endif