SNDCP: add RFC1144 header compression functionality

- Add module to handle compression entities
- Add module to control header compression
- Introduce VTY commands for heade compression configuration
- Add changes in sndcp and llc to integrate header compression

Change-Id: Ia00260dc09978844c2865957b4d43000b78b5e43

1 files changed, 9 insertions, 0 deletions

diff --git a/openbsc/include/openbsc/gprs_llc.h b/openbsc/include/openbsc/gprs_llc.h
index c3b82b146..8b014670d 100644
--- a/openbsc/include/openbsc/gprs_llc.h
+++ b/openbsc/include/openbsc/gprs_llc.h
@@ -174,6 +174,15 @@ struct gprs_llc_llme {
 	 * able to create the compression entity. */
 	struct llist_head *xid;
 
+	/* Compression entities */
+	struct {
+		/* In these two list_heads we will store the
+		 * data and protocol compression entities,
+		 * together with their compression states */
+		struct llist_head *proto;
+		struct llist_head *data;
+	} comp;
+
 	/* Internal management */
 	uint32_t age_timestamp;
 };