edge: Add max_mcs_ul and max_mcs_dl config

This sets the maximum MCS encoding used for EGPRS RLC data blocks
in either direction.

The following VTY command are added to node config-pcu:

 - mcs max <1-9>         set maximum for both, uplink and downlink
 - mcs max <1-9> <1-9>   set maximum for downlink and uplink (in that
                         order)
 - no mcs max            do not limit

Note that using a value of 4 or below for each direction implies
that a GMSK-only TBF may be assumed, which for instance would allow
the use of the GPRS MS class instead of the possibly more restrictive
EGPRS MS class.

Sponsored-by: On-Waves ehf

1 files changed, 1 insertions, 0 deletions

diff --git a/src/bts.h b/src/bts.h
index 704a5bec..1498ced3 100644
--- a/src/bts.h
+++ b/src/bts.h
@@ -156,6 +156,7 @@ struct gprs_rlcmac_bts {
 	uint8_t cs4;
 	uint8_t initial_cs_dl, initial_cs_ul;
 	uint8_t max_cs_dl, max_cs_ul;
+	uint8_t max_mcs_dl, max_mcs_ul;
 	uint8_t force_cs;	/* 0=use from BTS 1=use from VTY */
 	uint16_t force_llc_lifetime; /* overrides lifetime from SGSN */
 	uint32_t llc_discard_csec;