X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=net%2Fsctp%2Fchunk.c;h=4d3128f5ccc3f304676c8022410c40b32c3cf6d9;hb=83db33a3e5c4200eaf5dec5b4883c0e73f468a3b;hp=83ef411772f46f1494175d0320a0f4d43d134b46;hpb=dd0fc66fb33cd610bc1a5db8a5e232d34879b4d7;p=safe%2Fjmp%2Flinux-2.6

diff --git a/net/sctp/chunk.c b/net/sctp/chunk.c
index 83ef411..4d3128f 100644
--- a/net/sctp/chunk.c
+++ b/net/sctp/chunk.c
@@ -1,17 +1,17 @@
-/* SCTP kernel reference Implementation
+/* SCTP kernel implementation
  * (C) Copyright IBM Corp. 2003, 2004
  *
- * This file is part of the SCTP kernel reference Implementation
+ * This file is part of the SCTP kernel implementation
  *
- * This file contains the code relating the the chunk abstraction.
+ * This file contains the code relating the chunk abstraction.
  *
- * The SCTP reference implementation is free software;
+ * This SCTP implementation is free software;
  * you can redistribute it and/or modify it under the terms of
  * the GNU General Public License as published by
  * the Free Software Foundation; either version 2, or (at your option)
  * any later version.
  *
- * The SCTP reference implementation is distributed in the hope that it
+ * This SCTP implementation is distributed in the hope that it
  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  *                 ************************
  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
@@ -194,6 +194,18 @@ struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *asoc,
 
 	max = asoc->frag_point;
 
+	/* If the the peer requested that we authenticate DATA chunks
+	 * we need to accound for bundling of the AUTH chunks along with
+	 * DATA.
+	 */
+	if (sctp_auth_send_cid(SCTP_CID_DATA, asoc)) {
+		struct sctp_hmac *hmac_desc = sctp_auth_asoc_get_hmac(asoc);
+
+		if (hmac_desc)
+			max -= WORD_ROUND(sizeof(sctp_auth_chunk_t) +
+					    hmac_desc->hmac_len);
+	}
+
 	whole = 0;
 	first_len = max;