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-rw-r--r--include/osmo-bts/msg_utils.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/osmo-bts/msg_utils.h b/include/osmo-bts/msg_utils.h
index 7ddbe88f..fb8e11a5 100644
--- a/include/osmo-bts/msg_utils.h
+++ b/include/osmo-bts/msg_utils.h
@@ -22,6 +22,9 @@ struct msgb;
/* Access 3rd part of msgb control buffer */
#define rtpmsg_ts(x) ((x)->cb[2])
+/* Access 4th part of msgb control buffer */
+#define rtpmsg_is_rfc5993_sid(x) ((x)->cb[3])
+
/**
* Classification of OML message. ETSI for plain GSM 12.21
* messages and IPA/Osmo for manufacturer messages.