From f47bf214e59b78771f707a59e1a7cbecb70a9baa Mon Sep 17 00:00:00 2001
From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
Date: Fri, 5 Apr 2013 23:24:28 +0900
Subject: [PATCH] Allow server initiated stream ID in associated-stream-id

---
 lib/spdylay_session.c        | 4 +---
 lib/spdylay_submit.c         | 8 ++------
 tests/spdylay_session_test.c | 5 -----
 3 files changed, 3 insertions(+), 14 deletions(-)

diff --git a/lib/spdylay_session.c b/lib/spdylay_session.c
index e9d96fb..f4d6961 100644
--- a/lib/spdylay_session.c
+++ b/lib/spdylay_session.c
@@ -586,8 +586,7 @@ static int spdylay_session_predicate_syn_stream_send
   if(frame->assoc_stream_id != 0) {
     /* Check associated stream is active. */
     /* We assume here that if frame->assoc_stream_id != 0,
-       session->server is always 1 and frame->assoc_stream_id is
-       odd. */
+       session->server is always 1. */
     if(spdylay_session_get_stream(session, frame->assoc_stream_id) ==
        NULL) {
       return SPDYLAY_ERR_STREAM_CLOSED;
@@ -1642,7 +1641,6 @@ static int spdylay_session_validate_syn_stream(spdylay_session *session,
       return SPDYLAY_INVALID_STREAM;
     }
     if((frame->hd.flags & SPDYLAY_CTRL_FLAG_UNIDIRECTIONAL) == 0 ||
-       frame->assoc_stream_id % 2 == 0 ||
        spdylay_session_get_stream(session, frame->assoc_stream_id) == NULL) {
       /* It seems spdy/2 spec does not say which status code should be
          returned in these cases. */
diff --git a/lib/spdylay_submit.c b/lib/spdylay_submit.c
index 5cfcf75..3ac1bf6 100644
--- a/lib/spdylay_submit.c
+++ b/lib/spdylay_submit.c
@@ -48,12 +48,8 @@ static int spdylay_submit_syn_stream_shared
   if(pri > spdylay_session_get_pri_lowest(session)) {
     return SPDYLAY_ERR_INVALID_ARGUMENT;
   }
-  if(assoc_stream_id != 0) {
-    if(session->server == 0) {
-      assoc_stream_id = 0;
-    } else if(spdylay_session_is_my_stream_id(session, assoc_stream_id)) {
-      return SPDYLAY_ERR_INVALID_ARGUMENT;
-    }
+  if(assoc_stream_id != 0 && session->server == 0) {
+    assoc_stream_id = 0;
   }
   if(!spdylay_frame_nv_check_null(nv)) {
     return SPDYLAY_ERR_INVALID_ARGUMENT;
diff --git a/tests/spdylay_session_test.c b/tests/spdylay_session_test.c
index 880c80e..1c081b9 100644
--- a/tests/spdylay_session_test.c
+++ b/tests/spdylay_session_test.c
@@ -977,11 +977,6 @@ void test_spdylay_submit_syn_stream(void)
   CU_ASSERT(1 == OB_CTRL(item)->syn_stream.assoc_stream_id);
   CU_ASSERT(3 == OB_CTRL(item)->syn_stream.pri);
 
-  /* Invalid assoc-stream-ID */
-  CU_ASSERT(SPDYLAY_ERR_INVALID_ARGUMENT ==
-            spdylay_submit_syn_stream(session, SPDYLAY_CTRL_FLAG_FIN, 2, 3,
-                                      nv, NULL));
-
   spdylay_session_del(session);
 }