IKEv1 ConfigMode: Added TRANSACTION exchange type. Added attribute_payload (IKEv2 equiv cp_payload) and data_attribute (IKEv2 equiv configuration_attribute) payload types. Did not combine with IKEv2 because it wasn't trivial to do so. This might be a task worth investigating in the future, because there is a decent amount of shared code here.

src/libcharon/encoding/message.c

@@ -631,6 +631,24 @@ static payload_order_t quick_mode_r_order[] = {
 	{ID_V1,						0},
 };
 
+/**
+ * Message rule for TRANSACTION.
+ */
+static payload_rule_t transaction_payload_rules_v1[] = {
+/*	payload type			min	max	encr	suff */
+	{HASH_V1,			0,	1,	TRUE,	FALSE},
+	{ATTRIBUTE_V1,			1,	1,	FALSE,	FALSE},
+};
+
+/**
+ * Payload order for TRANSACTION.
+ */
+static payload_order_t transaction_payload_order_v1[] = {
+/*	payload type			notify type */
+	{HASH_V1,			0},
+	{ATTRIBUTE_V1,			0},
+};
+
 #endif /* USE_IKEV1 */
 
 /**
@@ -708,6 +726,14 @@ static message_rule_t message_rules[] = {
 		countof(quick_mode_r_rules), quick_mode_r_rules,
 		countof(quick_mode_r_order), quick_mode_r_order,
 	},
+	{TRANSACTION,		TRUE,	TRUE,
+		countof(transaction_payload_rules_v1), transaction_payload_rules_v1,
+		countof(transaction_payload_order_v1), transaction_payload_order_v1,
+	},
+	{TRANSACTION,		FALSE,	TRUE,
+		countof(transaction_payload_rules_v1), transaction_payload_rules_v1,
+		countof(transaction_payload_order_v1), transaction_payload_order_v1,
+	},
 	/* TODO-IKEv1: define rules for other exchanges */
 #endif /* USE_IKEV1 */
 };