#include <zebra.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
+
/*
* Generic IP address - union of IPv4 and IPv6 address.
*/
-enum ipaddr_type_t
-{
- IPADDR_NONE = 0,
- IPADDR_V4 = 1, /* IPv4 */
- IPADDR_V6 = 2, /* IPv6 */
+enum ipaddr_type_t {
+ IPADDR_NONE = 0,
+ IPADDR_V4 = 1, /* IPv4 */
+ IPADDR_V6 = 2, /* IPv6 */
};
-struct ipaddr
-{
- enum ipaddr_type_t ipa_type;
- union
- {
- u_char addr;
- struct in_addr _v4_addr;
- struct in6_addr _v6_addr;
- } ip;
+struct ipaddr {
+ enum ipaddr_type_t ipa_type;
+ union {
+ uint8_t addr;
+ struct in_addr _v4_addr;
+ struct in6_addr _v6_addr;
+ } ip;
#define ipaddr_v4 ip._v4_addr
#define ipaddr_v6 ip._v6_addr
};
#define SET_IPADDR_V4(p) (p)->ipa_type = IPADDR_V4
#define SET_IPADDR_V6(p) (p)->ipa_type = IPADDR_V6
-static inline int
-str2ipaddr (const char *str, struct ipaddr *ip)
+#define IPADDRSZ(p) \
+ (IS_IPADDR_V4((p)) ? sizeof(struct in_addr) : sizeof(struct in6_addr))
+
+static inline int str2ipaddr(const char *str, struct ipaddr *ip)
+{
+ int ret;
+
+ memset(ip, 0, sizeof(struct ipaddr));
+
+ ret = inet_pton(AF_INET, str, &ip->ipaddr_v4);
+ if (ret > 0) /* Valid IPv4 address. */
+ {
+ ip->ipa_type = IPADDR_V4;
+ return 0;
+ }
+ ret = inet_pton(AF_INET6, str, &ip->ipaddr_v6);
+ if (ret > 0) /* Valid IPv6 address. */
+ {
+ ip->ipa_type = IPADDR_V6;
+ return 0;
+ }
+
+ return -1;
+}
+
+static inline char *ipaddr2str(const struct ipaddr *ip, char *buf, int size)
+{
+ buf[0] = '\0';
+ if (ip) {
+ if (IS_IPADDR_V4(ip))
+ inet_ntop(AF_INET, &ip->ip.addr, buf, size);
+ else if (IS_IPADDR_V6(ip))
+ inet_ntop(AF_INET6, &ip->ip.addr, buf, size);
+ }
+ return buf;
+}
+
+/*
+ * Convert IPv4 address to IPv4-mapped IPv6 address which is of the
+ * form ::FFFF:<IPv4 address> (RFC 4291). This IPv6 address can then
+ * be used to represent the IPv4 address, wherever only an IPv6 address
+ * is required.
+ */
+static inline void ipv4_to_ipv4_mapped_ipv6(struct in6_addr *in6,
+ struct in_addr in)
+{
+ uint32_t addr_type = htonl(0xFFFF);
+
+ memset(in6, 0, sizeof(struct in6_addr));
+ memcpy((char *)in6 + 8, &addr_type, sizeof(addr_type));
+ memcpy((char *)in6 + 12, &in, sizeof(struct in_addr));
+}
+
+/*
+ * convert an ipv4 mapped ipv6 address back to ipv4 address
+ */
+static inline void ipv4_mapped_ipv6_to_ipv4(struct in6_addr *in6,
+ struct in_addr *in)
{
- int ret;
-
- memset (ip, 0, sizeof (struct ipaddr));
-
- ret = inet_pton (AF_INET, str, &ip->ipaddr_v4);
- if (ret > 0) /* Valid IPv4 address. */
- {
- ip->ipa_type = IPADDR_V4;
- return 0;
- }
- ret = inet_pton (AF_INET6, str, &ip->ipaddr_v6);
- if (ret > 0) /* Valid IPv6 address. */
- {
- ip->ipa_type = IPADDR_V6;
- return 0;
- }
-
- return -1;
+ memset(in, 0, sizeof(struct in_addr));
+ memcpy(in, (char *)in6 + 12, sizeof(struct in_addr));
}
-static inline char *
-ipaddr2str (struct ipaddr *ip, char *buf, int size)
+static inline bool ipaddr_isset(struct ipaddr *ip)
{
- buf[0] = '\0';
- if (ip)
- {
- if (IS_IPADDR_V4(ip))
- inet_ntop (AF_INET, &ip->ip.addr, buf, size);
- else if (IS_IPADDR_V6(ip))
- inet_ntop (AF_INET6, &ip->ip.addr, buf, size);
- }
- return buf;
+ static struct ipaddr a = {};
+ return (0 == memcmp(&a, ip, sizeof(struct ipaddr)));
}
+
+#ifdef __cplusplus
+}
+#endif
+
#endif /* __IPADDR_H__ */