ftmod_misdn: Reserve some space for the mISDN message header in misdn_write().

Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

diff --git a/libs/freetdm/src/ftmod/ftmod_misdn/ftmod_misdn.c b/libs/freetdm/src/ftmod/ftmod_misdn/ftmod_misdn.c
index 410722fd532d4b8e118416733a6a0a8bb2984dc1..947333a14ac9788faa8f8e40bd424a63971c59d0 100644 (file)
--- a/libs/freetdm/src/ftmod/ftmod_misdn/ftmod_misdn.c
+++ b/libs/freetdm/src/ftmod/ftmod_misdn/ftmod_misdn.c
@@ -1280,7 +1280,7 @@ static FIO_WRITE_FUNCTION(misdn_write)
        hh->id   = MISDN_ID_ANY;
 
        /* avoid buffer overflow */
-       size = MIN(size, MAX_DATA_MEM);
+       size = MIN(size, MAX_DATA_MEM - MISDN_HEADER_LEN);
 
        memcpy(wbuf + MISDN_HEADER_LEN, data, size);
        size += MISDN_HEADER_LEN;