X-Git-Url: https://git.decadent.org.uk/gitweb/?p=odhcp6c.git;a=blobdiff_plain;f=src%2Fodhcp6c.h;h=08a816f4446dd893d89db315bf6f8932200ab2b8;hp=d202790a1115e96efb5c1c142e64157d8b28a8b4;hb=687b3c65c0460dd8c4ba7e63e3ae0ab20836e6e8;hpb=dc186d6d2b0dd4ad23ca5fc69c00e81f796ff6d9

diff --git a/src/odhcp6c.h b/src/odhcp6c.h
index d202790..08a816f 100644
--- a/src/odhcp6c.h
+++ b/src/odhcp6c.h
@@ -18,6 +18,7 @@
 
 #define _unused __attribute__((unused))
 #define _packed __attribute__((packed))
+#define __aligned(n) __attribute__((aligned(n)))
 
 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
 
@@ -302,6 +303,14 @@ struct odhcp6c_entry {
 	uint8_t auxtarget[];
 };
 
+// Include padding after auxtarget to align the next entry
+#define odhcp6c_entry_size(entry) \
+	(sizeof(struct odhcp6c_entry) +	(((entry)->auxlen + 3) & ~3))
+
+#define odhcp6c_next_entry(entry) \
+	((struct odhcp6c_entry *)((uint8_t *)(entry) + odhcp6c_entry_size(entry)))
+
+
 struct odhcp6c_request_prefix {
 	uint32_t iaid;
 	uint16_t length;
@@ -335,7 +344,7 @@ bool odhcp6c_is_bound(void);
 void odhcp6c_clear_state(enum odhcp6c_state state);
 void odhcp6c_add_state(enum odhcp6c_state state, const void *data, size_t len);
 void odhcp6c_append_state(enum odhcp6c_state state, const void *data, size_t len);
-void odhcp6c_insert_state(enum odhcp6c_state state, size_t offset, const void *data, size_t len);
+int odhcp6c_insert_state(enum odhcp6c_state state, size_t offset, const void *data, size_t len);
 size_t odhcp6c_remove_state(enum odhcp6c_state state, size_t offset, size_t len);
 void* odhcp6c_move_state(enum odhcp6c_state state, size_t *len);
 void* odhcp6c_get_state(enum odhcp6c_state state, size_t *len);