Implemented unix version of libnet_get_ipaddr6()

2 files changed, 53 insertions, 1 deletions

diff --git a/libnet/include/libnet/libnet-functions.h b/libnet/include/libnet/libnet-functions.h
index eccc35d..6f98ab0 100644
--- a/libnet/include/libnet/libnet-functions.h
+++ b/libnet/include/libnet/libnet-functions.h
@@ -1869,7 +1869,11 @@ uint32_t
 libnet_get_ipaddr4(libnet_t *l);
 
 /**
- * This function is not yet implemented under IPv6.
+ * Returns the IPv6 address for the device libnet was initialized with. If
+ * libnet was initialized without a device (in raw socket mode) the function
+ * will attempt to find one. If the function fails and returns in6addr_error, a
+ * call to libnet_geterrror() will tell you why.
+ * This function is not yet implemented for Win32 platforms.
  * @param l pointer to a libnet context
  * @return well, nothing yet
  */
diff --git a/libnet/src/libnet_resolve.c b/libnet/src/libnet_resolve.c
index 642fcd5..961d710 100644
--- a/libnet/src/libnet_resolve.c
+++ b/libnet/src/libnet_resolve.c
@@ -294,6 +294,53 @@ libnet_name2addr6(libnet_t *l, char *host_name, uint8_t use_name)
     }
 }
 
+#if !defined(__WIN32__)
+
+#include <ifaddrs.h>
+
+struct libnet_in6_addr
+libnet_get_ipaddr6(libnet_t *l)
+{
+    struct ifaddrs *ifaddr, *p;
+    struct libnet_in6_addr addr;
+
+    if (l == NULL)
+    {
+        return (in6addr_error);
+    }
+
+    if (getifaddrs(&ifaddr) != 0)
+    {
+        snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
+                "%s(): getifaddrs(): %s\n", __func__, strerror(errno));
+        return (in6addr_error);
+    }
+
+    if (l->device == NULL)
+    {
+        if (libnet_select_device(l) == -1)
+        {
+            /* error msg set in libnet_select_device() */
+            return (in6addr_error);
+        }
+    }
+
+    for (p = ifaddr; p != NULL; p = p->ifa_next)
+    {
+        if ((strcmp(p->ifa_name, l->device) == 0) && (p->ifa_addr != NULL) &&
+                (p->ifa_addr->sa_family == AF_INET6))
+        {
+            memcpy(&addr.__u6_addr,
+                    ((struct sockaddr_in6*)p->ifa_addr)->sin6_addr.s6_addr, 16);
+            freeifaddrs(ifaddr);
+            return (addr);
+        }
+    }
+
+    freeifaddrs(ifaddr);
+    return (in6addr_error);
+}
+#else
 struct libnet_in6_addr
 libnet_get_ipaddr6(libnet_t *l)
 {
@@ -301,6 +348,7 @@ libnet_get_ipaddr6(libnet_t *l)
            "%s(): not yet Implemented\n", __func__);
     return (in6addr_error);
 }
+#endif /* WIN32 */
 
 #if !defined(__WIN32__)
 uint32_t