ms: Add support for maximum CS values

Currently the CS values can be increased to CS4 even when the "cs"
configuration command has been used with a lower value. The "cs"
command just sets the initial coding scheme, so other means are
needed to limit the selection. One approach is to use the CS flags
passed in SI, but these are currently ignored.

To make it possible to limit the CS selection by configuring the PCU,
this commit adds the following VTY commands to config-pcu:

- cs max <1-4>             Limit DL and UL CS to the given value
- cs max <1-4> <1-4>       Limit DL and UL CS separately (DL first)
- no cs max                Don't limit

Ticket: #1674
Sponsored-by: On-Waves ehf

1 files changed, 1 insertions, 0 deletions

diff --git a/src/bts.h b/src/bts.h
index b31db5fc..e52875eb 100644
--- a/src/bts.h
+++ b/src/bts.h
@@ -121,6 +121,7 @@ struct gprs_rlcmac_bts {
 	uint8_t cs3;
 	uint8_t cs4;
 	uint8_t initial_cs_dl, initial_cs_ul;
+	uint8_t max_cs_dl, max_cs_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;