X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?a=blobdiff_plain;f=src%2Frmr%2Fcommon%2Fsrc%2Fmbuf_api.c;h=84996ee7b6be6a5f869129510d97e8e95f91ffc4;hb=refs%2Fchanges%2F77%2F1977%2F1;hp=e88ab233436c13ea550a9b240078eb44a464a956;hpb=4ac73e3b9c0ff7aef80ad45f1bfead52bb2ffc99;p=ric-plt%2Flib%2Frmr.git

diff --git a/src/rmr/common/src/mbuf_api.c b/src/rmr/common/src/mbuf_api.c
index e88ab23..84996ee 100644
--- a/src/rmr/common/src/mbuf_api.c
+++ b/src/rmr/common/src/mbuf_api.c
@@ -22,7 +22,9 @@
 	Mnemonic:	mbuf_api.c
 	Abstract:	These are common functions which work only on the mbuf and
 				thus (because they do not touch an endpoint or context)
-				can be agnostic to the underlying transport.
+				can be agnostic to the underlying transport, or the transport
+				layer provides a transport specific function (e.g. payload 
+				reallocation).
 
 	Author:		E. Scott Daniels
 	Date:		8 February 2019
@@ -51,6 +53,12 @@
 		EINVAL id poitner, buf or buf header are bad.
 		EOVERFLOW if the bytes given would have overrun
 
+	We have been told that the meid will be a string, so we enforce that even if
+	the user is copying in bytes.  We will add a 0 byte at len+1 when len is less
+	than the field size, or as the last byte (doing damage to their string) if
+	the caller didn't play by the rules. If they pass a non-nil terminated set
+	of bytes which are the field length, we'll indicate truncation.
+
 */
 extern int rmr_bytes2meid( rmr_mbuf_t* mbuf, unsigned char const* src, int len ) {
 	uta_mhdr_t* hdr;
@@ -64,11 +72,20 @@ extern int rmr_bytes2meid( rmr_mbuf_t* mbuf, unsigned char const* src, int len )
 	if( len > RMR_MAX_MEID ) {
 		len = RMR_MAX_MEID;
 		errno = EOVERFLOW;
-	}
+	} 
 
 	hdr = (uta_mhdr_t *) mbuf->header;
 	memcpy( hdr->meid, src, len );
 
+	if( len == RMR_MAX_MEID ) {
+		if( *(hdr->meid+len-1) != 0 ) {
+			*(hdr->meid+len-1) = 0;
+			errno = EOVERFLOW;
+		}
+	} else {
+		*(hdr->meid+len) = 0;
+	}
+
 	return len;
 }
 
@@ -222,7 +239,7 @@ extern unsigned char*  rmr_get_xact( rmr_mbuf_t* mbuf, unsigned char* dest ) {
 }
 
 /*
-	Extracts the meid (managed equipment) from the header and copies the bytes
+	Extracts the meid (managed entity) from the header and copies the bytes
 	to the user supplied area. If the user supplied pointer is nil, then
 	a buffer will be allocated and it is the user's responsibilty to free.
 	A pointer is returned to the destination memory (allocated or not)
@@ -447,3 +464,4 @@ extern unsigned char* rmr_get_srcip( rmr_mbuf_t* msg, unsigned char* dest ) {
 
 	return rstr;
 }
+