rsl: define RSL_IE_OSMO_RTP_EXTENSIONS

This addition to Abis RSL is an Osmocom-specific IE, intended for
Osmocom flavor of Abis over IP.  It requests the use of non-standard
enhanced RTP transport formats.  Complete description of this new IE
is contained in this Technical Memorandum:

https://www.freecalypso.org/specs/tw-tm-004-v010001.txt

Related: OS#6448
Change-Id: I9ac692062e05f859ba56235375bdc10f212cb2c0
---
M include/osmocom/gsm/protocol/gsm_08_58.h
M src/gsm/rsl.c
2 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/include/osmocom/gsm/protocol/gsm_08_58.h b/include/osmocom/gsm/protocol/gsm_08_58.h
index e8758df..13e84ba 100644
--- a/include/osmocom/gsm/protocol/gsm_08_58.h
+++ b/include/osmocom/gsm/protocol/gsm_08_58.h
@@ -373,6 +373,7 @@
 	RSL_IE_OSMO_TRAINING_SEQUENCE	= 0x61,
 	RSL_IE_OSMO_TEMP_OVP_ACCH_CAP	= 0x62,
 	RSL_IE_OSMO_OSMUX_CID		= 0x63,
+	RSL_IE_OSMO_RTP_EXTENSIONS	= 0x64,
 
 	/* ip.access */
 	RSL_IE_IPAC_SRTP_CONFIG	= 0xe0,
diff --git a/src/gsm/rsl.c b/src/gsm/rsl.c
index fbba982..c7d69a1 100644
--- a/src/gsm/rsl.c
+++ b/src/gsm/rsl.c
@@ -126,6 +126,7 @@
 		[RSL_IE_OSMO_TRAINING_SEQUENCE]	= { TLV_TYPE_TLV },
 		[RSL_IE_OSMO_TEMP_OVP_ACCH_CAP]	= { TLV_TYPE_TLV },
 		[RSL_IE_OSMO_OSMUX_CID]		= { TLV_TYPE_TLV },
+		[RSL_IE_OSMO_RTP_EXTENSIONS]	= { TLV_TYPE_TLV },
 		[RSL_IE_IPAC_SRTP_CONFIG]	= { TLV_TYPE_TLV },
 		[RSL_IE_IPAC_PROXY_UDP]		= { TLV_TYPE_FIXED, 2 },
 		[RSL_IE_IPAC_BSCMPL_TOUT]	= { TLV_TYPE_TV },

