This should enable basic retransmission handling.

@@ -0,0 +51,4 @@
+
+	uint16_t *tmp = ham64->addr;
+
+	memset(ham64->addr, 0, 4*sizeof(uint16_t));

@@ -0,0 +137,4 @@
+		"BROADCAST",
+		"IPV6_MULTICAST",
+		"IPV4_MULTICAST",
+		"RESERVED"};

@@ -0,0 +173,4 @@
+void ham64_format(const ham64_t *ham64, char *out)
+{
+	for(uint8_t i = 0; i < ham64->length; i++) {
+		sprintf(out + 5 * i, "%04X-", ham64->addr[i]);

@@ -0,0 +45,4 @@
+
+	memcpy(header->src_addr.addr, encoded + 2, 2 * header->src_addr.length);
+	memcpy(header->dst_addr.addr, encoded + 2 + 2 * header->src_addr.length, 2 * header->dst_addr.length);
+

@@ -0,0 +21,4 @@
+
+	uint8_t tx_seq_nr;              //!< sequence number of this packet
+	uint8_t rx_seq_nr;              //!< sequence number expected next from he other side
+

@@ -0,0 +1,50 @@
+#include <stdio.h>

@@ -0,0 +7,4 @@
+bool test_decode(const char *ref, const ham64_t *ham64)
+{
+	char decoded[13];
+	decoded[12] = 0;

@@ -0,0 +15,4 @@
+
+	ham64_format(ham64, ham64_format_buf);
+	const char *typestr = ham64_addr_type_to_string(ham64_get_addr_type(ham64));
+	printf("»%s« → [%u] %s (%s) → [%zd] »%s«\n", ref, ham64->length, ham64_format_buf, typestr, decoded_len, decoded);

@@ -0,0 +47,4 @@
+	test_decode("", &short_1);
+	test_decode("", &short_last);
+	test_decode("", &broadcast);
+}