struct sd_radv_opt_dns *dnssl;
};
+#define radv_prefix_opt__contents { \
+ uint8_t type; \
+ uint8_t length; \
+ uint8_t prefixlen; \
+ uint8_t flags; \
+ be32_t valid_lifetime; \
+ be32_t preferred_lifetime; \
+ uint32_t reserved; \
+ struct in6_addr in6_addr; \
+}
+
+struct radv_prefix_opt radv_prefix_opt__contents;
+
+/* We need the opt substructure to be packed, because we use it in send(). But
+ * if we use _packed_, this means that the structure cannot be used directly in
+ * normal code in general, because the fields might not be properly aligned.
+ * But in this particular case, the structure is defined in a way that gives
+ * proper alignment, even without the explicit _packed_ attribute. To appease
+ * the compiler we use the "unpacked" structure, but we also verify that
+ * structure contains no holes, so offsets are the same when _packed_ is used.
+ */
+struct radv_prefix_opt__packed radv_prefix_opt__contents _packed_;
+assert_cc(sizeof(struct radv_prefix_opt) == sizeof(struct radv_prefix_opt__packed));
+
struct sd_radv_prefix {
unsigned n_ref;
- struct {
- uint8_t type;
- uint8_t length;
- uint8_t prefixlen;
- uint8_t flags;
- be32_t valid_lifetime;
- be32_t preferred_lifetime;
- uint32_t reserved;
- struct in6_addr in6_addr;
- } _packed_ opt;
+ struct radv_prefix_opt opt;
LIST_FIELDS(struct sd_radv_prefix, prefix);