Something is wrong in 'userp' for the HTTP2 recv_callback().
The session is created using bogus user-data; '&conn' and not
'conn'.

I noticed this since the socket-value in Curl_read_plain() was set to a
impossible high value. A patch:

--- orig/http2.c" 2014-01-29 15:19:25 +0000
+++ http2.c 2014-01-29 16:38:07 +0000
@@ -111,12 +111,12 @@
 {
   struct connectdata *conn = (struct connectdata *)userp;
   ssize_t nread;
- CURLcode rc = Curl_read_plain(conn->sock[0], (char *)buf, length, &nread);
+ CURLcode rc = Curl_read_plain(conn->sock[FIRSTSOCKET], (char *)buf, length, &nread);
   (void)h2;
   (void)flags;

   if(rc) {
- failf(conn->data, "Failed recving HTTP2 data");
+ failf(conn->data, "Failed receiving HTTP2 data");
     return NGHTTP2_ERR_CALLBACK_FAILURE;
   }
   if(!nread)
@@ -169,7 +171,7 @@
   if(!conn->proto.httpc.h2) {
     /* The nghttp2 session is not yet setup, do it */
     int rc = nghttp2_session_client_new(&conn->proto.httpc.h2,
- &callbacks, &conn);
+ &callbacks, conn);
     if(rc) {
       failf(conn->data, "Couldn't initialize nghttp2!");
       return CURLE_OUT_OF_MEMORY; /* most likely at least */

---------------

Things work bettter now:
  < Upgrade: HTTP-draft-09/2.0
  * Received 101
  * We have switched to HTTP2
  * Failed receiving HTTP2 data

The last error seems to be due to a EWOULDBLOCK in the callback.
Should we maybe return NGHTTP2_ERR_WOULDBLOCK in this case?

--gv
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Received on 2014-01-29