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diff --git a/src/mt/ss_strm.x b/src/mt/ss_strm.x
new file mode 100755
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+++ b/src/mt/ss_strm.x
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+/*******************************************************************************
+################################################################################
+#   Copyright (c) [2017-2019] [Radisys]                                        #
+#                                                                              #
+#   Licensed under the Apache License, Version 2.0 (the "License");            #
+#   you may not use this file except in compliance with the License.           #
+#   You may obtain a copy of the License at                                    #
+#                                                                              #
+#       http://www.apache.org/licenses/LICENSE-2.0                             #
+#                                                                              #
+#   Unless required by applicable law or agreed to in writing, software        #
+#   distributed under the License is distributed on an "AS IS" BASIS,          #
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   #
+#   See the License for the specific language governing permissions and        #
+#   limitations under the License.                                             #
+################################################################################
+*******************************************************************************/
+
+
+/********************************************************************20**
+ 
+     Name:     System Services -- STREAMS
+ 
+     Type:     C include file
+ 
+     Desc:     Data structure definitions for STREAMS messages.
+ 
+     File:     ss_strm.x
+ 
+*********************************************************************21*/
+
+
+#ifndef __SSSTRMX__
+#define __SSSTRMX__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* message block is defined in ssi.x */
+typedef struct ssmsgb    SsMblk;
+
+
+
+/* data block */
+struct ssdatab
+{
+   U8                   db_ref;                 /* reference count */
+   U8                   db_type;                /* type of data block */
+	/* ss006.301 */
+   Bool                 shared;                 /* is this data block shared ? */
+#ifndef  SS_DBUF_REFLOCK_DISABLE
+   SLockId              dBufLock;              /* Lock per Dbuf */
+#endif
+   U8                   *db_base;               /* base of data buffer */
+   U8                   *db_lim;                /* limit of data buffer */
+	/* ss008.301 - deprecating for normal OS, useful for Cavium/RMI OS*/
+#ifdef SS_DBLK_FREE_RTN
+   struct ssfree_rtn    *db_frtnp;             /* free routine */
+#endif /* SS_DBLK_FREE_RTN */
+};
+
+typedef struct ssdatab   SsDblk;
+
+
+
+/* to free memory used with esballoc() */
+struct ssfree_rtn
+{
+   void                 (*free_func)(char *);   /* free function */
+   char                 *free_arg;              /* argument to function */
+};
+
+typedef struct ssfree_rtn SsFrtn;
+
+
+
+/* STREAMS functions prototypes */
+PUBLIC S16      ssStrmCfg ARGS((Region, Region));
+PUBLIC S32      ssAdjMsg ARGS((SsMblk *, S32));
+PUBLIC SsMblk   *ssAllocB ARGS((S32, U32));
+PUBLIC SsMblk   *ssCopyB ARGS((SsMblk *));
+PUBLIC SsMblk   *ssCopyMsg ARGS((SsMblk *));
+PUBLIC SsMblk   *ssDupB ARGS((SsMblk *));
+PUBLIC SsMblk   *ssDupMsg ARGS((SsMblk *));
+PUBLIC SsMblk   *ssESBAlloc ARGS((U8 *, S32, S32, SsFrtn *));
+PUBLIC void     ssFreeB ARGS((SsMblk *));
+PUBLIC void     ssFreeMsg ARGS((SsMblk *));
+PUBLIC void     ssLinkB ARGS((SsMblk *, SsMblk *));
+PUBLIC S32      ssMsgDSize ARGS((SsMblk *));
+PUBLIC S32      ssPullupMsg ARGS((SsMblk *, S32));
+PUBLIC SsMblk   *ssRmvB ARGS((SsMblk *, SsMblk *));
+PUBLIC S32      ssTestB ARGS((S32, U32));
+PUBLIC SsMblk   *ssUnlinkB ARGS((SsMblk *));
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /*  __SSSTRMX__  */
+
+/**********************************************************************
+         End of file
+**********************************************************************/