From 744d5c815bd4fb0386bb945b77589f0b89167045 Mon Sep 17 00:00:00 2001
From: Nikos Mavrogiannopoulos <nmav@gnutls.org>
Date: Fri, 29 Jun 2012 16:40:30 +0200
Subject: [PATCH] cleaned up errno handling.

---
 lib/gnutls_buffers.c | 55 +++++++++++++++++++++++++++-------------------------
 1 file changed, 29 insertions(+), 26 deletions(-)

diff --git a/lib/gnutls_buffers.c b/lib/gnutls_buffers.c
index afa5d306f..74e2d92da 100644
--- a/lib/gnutls_buffers.c
+++ b/lib/gnutls_buffers.c
@@ -155,6 +155,23 @@ int ret;
   return ret;
 }
 
+inline static 
+int errno_to_gerr(int err)
+{
+  switch(err)
+    {
+      case EAGAIN:
+        return GNUTLS_E_AGAIN;
+      case EINTR:
+        return GNUTLS_E_INTERRUPTED;
+      case EMSGSIZE:
+        return GNUTLS_E_LARGE_PACKET;
+      default:
+        gnutls_assert ();
+        return GNUTLS_E_PUSH_ERROR;
+    }
+}
+
 static ssize_t
 _gnutls_dgram_read (gnutls_session_t session, mbuffer_st **bufel,
 		    gnutls_pull_func pull_func)
@@ -186,20 +203,7 @@ _gnutls_dgram_read (gnutls_session_t session, mbuffer_st **bufel,
       _gnutls_read_log ("READ: %d returned from %p, errno=%d gerrno=%d\n",
 			(int) i, fd, errno, session->internals.errnum);
 
-      switch(err)
-        {
-          case EAGAIN:
-            ret = GNUTLS_E_AGAIN;
-            goto cleanup;
-          case EINTR:
-            ret = GNUTLS_E_INTERRUPTED;
-            goto cleanup;
-          case EMSGSIZE:
-            ret = GNUTLS_E_LARGE_PACKET;
-          default:
-            gnutls_assert ();
-            ret = GNUTLS_E_PULL_ERROR;
-        }
+      ret = errno_to_gerr(err);
       goto cleanup;
     }
   else
@@ -271,9 +275,7 @@ _gnutls_stream_read (gnutls_session_t session, mbuffer_st **bufel,
                   goto finish;
                 }
 
-              if (err == EAGAIN)
-                return GNUTLS_E_AGAIN;
-              return GNUTLS_E_INTERRUPTED;
+              return errno_to_gerr(err);
             }
           else
             {
@@ -346,6 +348,7 @@ _gnutls_writev_emu (gnutls_session_t session, gnutls_transport_ptr_t fd, const g
   return ret;
 }
 
+
 static ssize_t
 _gnutls_writev (gnutls_session_t session, const giovec_t * giovec,
                 int giovec_cnt)
@@ -364,15 +367,8 @@ _gnutls_writev (gnutls_session_t session, const giovec_t * giovec,
     {
       int err = get_errno (session);
       _gnutls_debug_log ("errno: %d\n", err);
-      if (err == EAGAIN)
-        return GNUTLS_E_AGAIN;
-      else if (err == EINTR)
-        return GNUTLS_E_INTERRUPTED;
-      else
-        {
-          gnutls_assert ();
-          return GNUTLS_E_PUSH_ERROR;
-        }
+
+      return errno_to_gerr(err);
     }
   return i;
 }
@@ -590,6 +586,13 @@ _gnutls_io_write_flush (gnutls_session_t session)
                          (int) send_buffer->byte_length);
       return ret;
     }
+  else if (ret == GNUTLS_E_LARGE_PACKET)
+    {
+      _mbuffer_head_remove_bytes (send_buffer, tosend);
+      _gnutls_write_log ("WRITE cannot send large packet (%u bytes).\n",
+                         (unsigned int) tosend);
+      return ret;
+    }
   else
     {
       _gnutls_write_log ("WRITE error: code %d, %d bytes left.\n",
-- 
2.11.4.GIT