SGSN: encrypt/decrypt only necessary frames
According to 3GPP TS 24.008 ยง 4.7.1.2 some GMM frames are not supposed
to be ciphered. Propagate information about the necessity for
encryption between MM <-> LLC to ensure only proper frames are
encrypted/decrypted/dropped.
Change-Id: I0358905e60d1b182f75caec81bfcc72bbbbb2aa1
Related: OS#1582
diff --git a/openbsc/src/gprs/gprs_sndcp.c b/openbsc/src/gprs/gprs_sndcp.c
index 46d779b..75f95c9 100644
--- a/openbsc/src/gprs/gprs_sndcp.c
+++ b/openbsc/src/gprs/gprs_sndcp.c
@@ -22,6 +22,7 @@
#include <errno.h>
#include <stdint.h>
+#include <stdbool.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/linuxlist.h>
@@ -417,7 +418,7 @@
/* set the MORE bit of the SNDCP header accordingly */
sch->more = more;
- rc = gprs_llc_tx_ui(fmsg, lle->sapi, 0, fs->mmcontext);
+ rc = gprs_llc_tx_ui(fmsg, lle->sapi, 0, fs->mmcontext, true);
/* abort in case of error, do not advance frag_nr / next_byte */
if (rc < 0) {
msgb_free(fs->msg);
@@ -498,7 +499,7 @@
sch->type = 1;
sch->nsapi = nsapi;
- return gprs_llc_tx_ui(msg, lle->sapi, 0, mmcontext);
+ return gprs_llc_tx_ui(msg, lle->sapi, 0, mmcontext, true);
}
/* Section 5.1.2.17 LL-UNITDATA.ind */