diff --git a/src/rtmp/ctrans.c b/src/rtmp/ctrans.c
new file mode 100644
index 0000000..6e56f84
--- /dev/null
+++ b/src/rtmp/ctrans.c
@@ -0,0 +1,138 @@
+/**
+ * @file rtmp/ctrans.c  Real Time Messaging Protocol -- AMF Client Transactions
+ *
+ * Copyright (C) 2010 Creytiv.com
+ */
+#include <string.h>
+#include <re_types.h>
+#include <re_fmt.h>
+#include <re_mem.h>
+#include <re_mbuf.h>
+#include <re_net.h>
+#include <re_sa.h>
+#include <re_list.h>
+#include <re_tcp.h>
+#include <re_sys.h>
+#include <re_odict.h>
+#include <re_rtmp.h>
+#include "rtmp.h"
+
+
+struct rtmp_ctrans {
+	struct le le;
+	uint64_t tid;
+	rtmp_resp_h *resph;
+	void *arg;
+};
+
+
+static void ctrans_destructor(void *data)
+{
+	struct rtmp_ctrans *ct = data;
+
+	list_unlink(&ct->le);
+}
+
+
+static struct rtmp_ctrans *rtmp_ctrans_find(const struct list *ctransl,
+					    uint64_t tid)
+{
+	struct le *le;
+
+	for (le = list_head(ctransl); le; le = le->next) {
+		struct rtmp_ctrans *ct = le->data;
+
+		if (tid == ct->tid)
+			return ct;
+	}
+
+	return NULL;
+}
+
+
+int rtmp_amf_request(struct rtmp_conn *conn, uint32_t stream_id,
+		     const char *command,
+		     rtmp_resp_h *resph, void *arg, unsigned body_propc, ...)
+{
+	struct rtmp_ctrans *ct = NULL;
+	struct mbuf *mb;
+	va_list ap;
+	int err;
+
+	if (!conn || !command || !resph)
+		return EINVAL;
+
+	mb = mbuf_alloc(512);
+	if (!mb)
+		return ENOMEM;
+
+	ct = mem_zalloc(sizeof(*ct), ctrans_destructor);
+	if (!ct) {
+		err = ENOMEM;
+		goto out;
+	}
+
+	ct->tid   = rtmp_conn_assign_tid(conn);
+	ct->resph = resph;
+	ct->arg   = arg;
+
+	err = rtmp_command_header_encode(mb, command, ct->tid);
+	if (err)
+		goto out;
+
+	if (body_propc) {
+		va_start(ap, body_propc);
+		err = rtmp_amf_vencode_object(mb, RTMP_AMF_TYPE_ROOT,
+					      body_propc, &ap);
+		va_end(ap);
+		if (err)
+			goto out;
+	}
+
+	err = rtmp_send_amf_command(conn, 0, RTMP_CHUNK_ID_CONN,
+				    RTMP_TYPE_AMF0,
+				    stream_id, mb->buf, mb->end);
+	if (err)
+		goto out;
+
+	list_append(&conn->ctransl, &ct->le, ct);
+
+ out:
+	mem_deref(mb);
+	if (err)
+		mem_deref(ct);
+
+	return err;
+}
+
+
+int rtmp_ctrans_response(const struct list *ctransl,
+			 const struct odict *msg)
+{
+	struct rtmp_ctrans *ct;
+	uint64_t tid;
+	bool success;
+	rtmp_resp_h *resph;
+	void *arg;
+
+	if (!ctransl || !msg)
+		return EINVAL;
+
+	success = (0 == str_casecmp(odict_string(msg, "0"), "_result"));
+
+	if (!odict_get_number(msg, &tid, "1"))
+		return EPROTO;
+
+	ct = rtmp_ctrans_find(ctransl, tid);
+	if (!ct)
+		return ENOENT;
+
+	resph = ct->resph;
+	arg = ct->arg;
+
+	mem_deref(ct);
+
+	resph(success, msg, arg);
+
+	return 0;
+}