diff --git a/lib/Makefile.am b/lib/Makefile.am
index 24ea437..3a22be2 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -33,12 +33,14 @@ lib_LTLIBRARIES = libspdylay.la
 
 OBJECTS = spdylay_pq.c spdylay_map.c spdylay_queue.c \
 	spdylay_buffer.c spdylay_frame.c spdylay_zlib.c \
-	spdylay_session.c spdylay_helper.c spdylay_stream.c spdylay_npn.c
+	spdylay_session.c spdylay_helper.c spdylay_stream.c spdylay_npn.c \
+	spdylay_submit.c
 
 HFILES = spdylay_pq.h spdylay_int.h spdylay_map.h spdylay_queue.h \
 	spdylay_buffer.h spdylay_frame.h spdylay_zlib.h \
 	spdylay_session.h spdylay_helper.h spdylay_stream.h spdylay_int.h \
-	spdylay_npn.h
+	spdylay_npn.h \
+	spdylay_submit.h
 
 libspdylay_la_SOURCES = $(HFILES) $(OBJECTS)
 libspdylay_la_LDFLAGS = -no-undefined \
diff --git a/lib/spdylay_session.c b/lib/spdylay_session.c
index b5ce4b7..5c0f877 100644
--- a/lib/spdylay_session.c
+++ b/lib/spdylay_session.c
@@ -1533,141 +1533,6 @@ int spdylay_session_add_goaway(spdylay_session *session,
   return r;
 }
 
-int spdylay_submit_ping(spdylay_session *session)
-{
-  return spdylay_session_add_ping(session,
-                                  spdylay_session_get_next_unique_id(session));
-}
-
-int spdylay_submit_cancel(spdylay_session *session, int32_t stream_id,
-                          uint32_t status_code)
-{
-  return spdylay_session_add_rst_stream(session, stream_id, status_code);
-}
-
-int spdylay_submit_goaway(spdylay_session *session)
-{
-  return spdylay_session_add_goaway(session, session->last_recv_stream_id);
-}
-
-int spdylay_submit_response(spdylay_session *session,
-                            int32_t stream_id, const char **nv,
-                            spdylay_data_provider *data_prd)
-{
-  int r;
-  spdylay_frame *frame;
-  char **nv_copy;
-  uint8_t flags = 0;
-  spdylay_data_provider *data_prd_copy = NULL;
-  if(data_prd) {
-    data_prd_copy = malloc(sizeof(spdylay_data_provider));
-    if(data_prd_copy == NULL) {
-      return SPDYLAY_ERR_NOMEM;
-    }
-    *data_prd_copy = *data_prd;
-  }
-  frame = malloc(sizeof(spdylay_frame));
-  if(frame == NULL) {
-    free(data_prd_copy);
-    return SPDYLAY_ERR_NOMEM;
-  }
-  nv_copy = spdylay_frame_nv_copy(nv);
-  if(nv_copy == NULL) {
-    free(frame);
-    free(data_prd_copy);
-    return SPDYLAY_ERR_NOMEM;
-  }
-  spdylay_frame_nv_sort(nv_copy);
-  if(data_prd == NULL) {
-    flags |= SPDYLAY_FLAG_FIN;
-  }
-  spdylay_frame_syn_reply_init(&frame->syn_reply, flags, stream_id,
-                               nv_copy);
-  r = spdylay_session_add_frame(session, SPDYLAY_SYN_REPLY, frame,
-                                data_prd_copy);
-  if(r != 0) {
-    spdylay_frame_syn_reply_free(&frame->syn_reply);
-    free(frame);
-    free(data_prd_copy);
-  }
-  return r;
-}
-
-int spdylay_submit_data(spdylay_session *session, int32_t stream_id,
-                        spdylay_data_provider *data_prd)
-{
-  int r;
-  spdylay_frame *frame;
-  frame = malloc(sizeof(spdylay_frame));
-  if(frame == NULL) {
-    return SPDYLAY_ERR_NOMEM;
-  }
-  spdylay_frame_data_init(&frame->data, stream_id, data_prd);
-  r = spdylay_session_add_frame(session, SPDYLAY_DATA, frame, NULL);
-  if(r != 0) {
-    spdylay_frame_data_free(&frame->data);
-    free(frame);
-  }
-  return r;
-}
-
-int spdylay_submit_request(spdylay_session *session, uint8_t pri,
-                           const char **nv, spdylay_data_provider *data_prd,
-                           void *stream_user_data)
-{
-  int r;
-  spdylay_frame *frame;
-  char **nv_copy;
-  uint8_t flags = 0;
-  spdylay_data_provider *data_prd_copy = NULL;
-  spdylay_syn_stream_aux_data *aux_data;
-  if(pri > 3) {
-    return SPDYLAY_ERR_INVALID_ARGUMENT;
-  }
-  if(data_prd) {
-    data_prd_copy = malloc(sizeof(spdylay_data_provider));
-    if(data_prd_copy == NULL) {
-      return SPDYLAY_ERR_NOMEM;
-    }
-    *data_prd_copy = *data_prd;
-  }
-  aux_data = malloc(sizeof(spdylay_syn_stream_aux_data));
-  if(aux_data == NULL) {
-    free(data_prd_copy);
-    return SPDYLAY_ERR_NOMEM;
-  }
-  aux_data->data_prd = data_prd_copy;
-  aux_data->stream_user_data = stream_user_data;
-
-  frame = malloc(sizeof(spdylay_frame));
-  if(frame == NULL) {
-    free(aux_data);
-    free(data_prd_copy);
-    return SPDYLAY_ERR_NOMEM;
-  }
-  nv_copy = spdylay_frame_nv_copy(nv);
-  if(nv_copy == NULL) {
-    free(frame);
-    free(aux_data);
-    free(data_prd_copy);
-    return SPDYLAY_ERR_NOMEM;
-  }
-  spdylay_frame_nv_sort(nv_copy);
-  if(data_prd == NULL) {
-    flags |= SPDYLAY_FLAG_FIN;
-  }
-  spdylay_frame_syn_stream_init(&frame->syn_stream, flags, 0, 0, pri, nv_copy);
-  r = spdylay_session_add_frame(session, SPDYLAY_SYN_STREAM, frame,
-                                aux_data);
-  if(r != 0) {
-    spdylay_frame_syn_stream_free(&frame->syn_stream);
-    free(frame);
-    free(aux_data);
-    free(data_prd_copy);
-  }
-  return r;
-}
-
 ssize_t spdylay_session_pack_data(spdylay_session *session,
                                   uint8_t **buf_ptr, spdylay_data *frame)
 {
diff --git a/lib/spdylay_submit.c b/lib/spdylay_submit.c
new file mode 100644
index 0000000..1daaba2
--- /dev/null
+++ b/lib/spdylay_submit.c
@@ -0,0 +1,163 @@
+/*
+ * Spdylay - SPDY Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "spdylay_submit.h"
+
+#include "spdylay_session.h"
+#include "spdylay_frame.h"
+
+int spdylay_submit_ping(spdylay_session *session)
+{
+  return spdylay_session_add_ping(session,
+                                  spdylay_session_get_next_unique_id(session));
+}
+
+int spdylay_submit_cancel(spdylay_session *session, int32_t stream_id,
+                          uint32_t status_code)
+{
+  return spdylay_session_add_rst_stream(session, stream_id, status_code);
+}
+
+int spdylay_submit_goaway(spdylay_session *session)
+{
+  return spdylay_session_add_goaway(session, session->last_recv_stream_id);
+}
+
+int spdylay_submit_response(spdylay_session *session,
+                            int32_t stream_id, const char **nv,
+                            spdylay_data_provider *data_prd)
+{
+  int r;
+  spdylay_frame *frame;
+  char **nv_copy;
+  uint8_t flags = 0;
+  spdylay_data_provider *data_prd_copy = NULL;
+  if(data_prd) {
+    data_prd_copy = malloc(sizeof(spdylay_data_provider));
+    if(data_prd_copy == NULL) {
+      return SPDYLAY_ERR_NOMEM;
+    }
+    *data_prd_copy = *data_prd;
+  }
+  frame = malloc(sizeof(spdylay_frame));
+  if(frame == NULL) {
+    free(data_prd_copy);
+    return SPDYLAY_ERR_NOMEM;
+  }
+  nv_copy = spdylay_frame_nv_copy(nv);
+  if(nv_copy == NULL) {
+    free(frame);
+    free(data_prd_copy);
+    return SPDYLAY_ERR_NOMEM;
+  }
+  spdylay_frame_nv_sort(nv_copy);
+  if(data_prd == NULL) {
+    flags |= SPDYLAY_FLAG_FIN;
+  }
+  spdylay_frame_syn_reply_init(&frame->syn_reply, flags, stream_id,
+                               nv_copy);
+  r = spdylay_session_add_frame(session, SPDYLAY_SYN_REPLY, frame,
+                                data_prd_copy);
+  if(r != 0) {
+    spdylay_frame_syn_reply_free(&frame->syn_reply);
+    free(frame);
+    free(data_prd_copy);
+  }
+  return r;
+}
+
+int spdylay_submit_data(spdylay_session *session, int32_t stream_id,
+                        spdylay_data_provider *data_prd)
+{
+  int r;
+  spdylay_frame *frame;
+  frame = malloc(sizeof(spdylay_frame));
+  if(frame == NULL) {
+    return SPDYLAY_ERR_NOMEM;
+  }
+  spdylay_frame_data_init(&frame->data, stream_id, data_prd);
+  r = spdylay_session_add_frame(session, SPDYLAY_DATA, frame, NULL);
+  if(r != 0) {
+    spdylay_frame_data_free(&frame->data);
+    free(frame);
+  }
+  return r;
+}
+
+int spdylay_submit_request(spdylay_session *session, uint8_t pri,
+                           const char **nv, spdylay_data_provider *data_prd,
+                           void *stream_user_data)
+{
+  int r;
+  spdylay_frame *frame;
+  char **nv_copy;
+  uint8_t flags = 0;
+  spdylay_data_provider *data_prd_copy = NULL;
+  spdylay_syn_stream_aux_data *aux_data;
+  if(pri > 3) {
+    return SPDYLAY_ERR_INVALID_ARGUMENT;
+  }
+  if(data_prd) {
+    data_prd_copy = malloc(sizeof(spdylay_data_provider));
+    if(data_prd_copy == NULL) {
+      return SPDYLAY_ERR_NOMEM;
+    }
+    *data_prd_copy = *data_prd;
+  }
+  aux_data = malloc(sizeof(spdylay_syn_stream_aux_data));
+  if(aux_data == NULL) {
+    free(data_prd_copy);
+    return SPDYLAY_ERR_NOMEM;
+  }
+  aux_data->data_prd = data_prd_copy;
+  aux_data->stream_user_data = stream_user_data;
+
+  frame = malloc(sizeof(spdylay_frame));
+  if(frame == NULL) {
+    free(aux_data);
+    free(data_prd_copy);
+    return SPDYLAY_ERR_NOMEM;
+  }
+  nv_copy = spdylay_frame_nv_copy(nv);
+  if(nv_copy == NULL) {
+    free(frame);
+    free(aux_data);
+    free(data_prd_copy);
+    return SPDYLAY_ERR_NOMEM;
+  }
+  spdylay_frame_nv_sort(nv_copy);
+  if(data_prd == NULL) {
+    flags |= SPDYLAY_FLAG_FIN;
+  }
+  spdylay_frame_syn_stream_init(&frame->syn_stream, flags, 0, 0, pri, nv_copy);
+  r = spdylay_session_add_frame(session, SPDYLAY_SYN_STREAM, frame,
+                                aux_data);
+  if(r != 0) {
+    spdylay_frame_syn_stream_free(&frame->syn_stream);
+    free(frame);
+    free(aux_data);
+    free(data_prd_copy);
+  }
+  return r;
+}
diff --git a/lib/spdylay_submit.h b/lib/spdylay_submit.h
new file mode 100644
index 0000000..b7bad41
--- /dev/null
+++ b/lib/spdylay_submit.h
@@ -0,0 +1,34 @@
+/*
+ * Spdylay - SPDY Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef SPDYLAY_SUBMIT_H
+#define SPDYLAY_SUBMIT_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <spdylay/spdylay.h>
+
+#endif /* SPDYLAY_SUBMIT_H */