added generalized sockaddr structure and ip6 sockaddr

src/include/gpxe/in.h

@@ -3,31 +3,91 @@
 
 #include <stdint.h>
 
+/* Protocol numbers */
+
 #define IP_ICMP		1
 #define IP_IGMP		2
 #define IP_TCP		6
 #define IP_UDP		17
 
+/* Network address family numbers */
+
+#define AF_INET		1
+#define AF_INET6	2
+#define AF_802          6
+#define AF_IPX          11
+
+typedef uint16_t sa_family_t;
+
+/* IP address constants */
+
 #define INADDR_NONE 0xffffffff
 
 #define INADDR_BROADCAST 0xffffffff
 
 #define IN_MULTICAST(addr) ( ( (addr) & 0xf0000000 ) == 0xe0000000 )
 
+/**
+ * IP address structure
+ */
 struct in_addr {
 	uint32_t	s_addr;
 };
 
 typedef struct in_addr in_addr;
 
+/**
+ * IP6 address structure
+ */
+struct in6_addr {
+        union {
+                uint8_t u6_addr8[16];
+                uint16_t u6_addr16[8];
+                uint32_t u6_addr32[4];
+        } in16_u;
+#define s6_addr         in6_u.u6_addr8
+#define s6_addr16       in6_u.u6_addr16
+#define s6_addr32       in6_u.u6_addr32
+};
+
 typedef uint16_t in_port_t;
 
+/**
+ * IP socket address
+ */
 struct sockaddr_in {
 	struct in_addr	sin_addr;
 	in_port_t	sin_port;
 };
 
+/**
+ * IPv6 socket address
+ */
+struct sockaddr_in6 {
+        in_port_t       sin6_port;      /* Destination port */
+        uint32_t        sin6_flowinfo;  /* Flow number */
+        struct in6_addr sin6_addr;      /* 128-bit destination address */
+        uint32_t        sin6_scope_id;  /* Scope ID */
+};
+
+/**
+ * Generalized socket address structure
+ */
+struct sockaddr {
+        sa_family_t             sa_family;      /* Socket address family */
+        struct sockaddr_in      sin;            /* IP4 socket address */
+        struct sockaddr_in6     sin6;           /* IP6 socket address */
+};
+
 extern int inet_aton ( const char *cp, struct in_addr *inp );
 extern char * inet_ntoa ( struct in_addr in );
 
+/* Adding the following for IP6 support
+ *
+
+extern int inet6_aton ( const char *cp, struct in6_addr *inp );
+extern char * inet6_ntoa ( struct in_addr in );
+
+ */
+
 #endif	/* _GPXE_IN_H */