04.08: apply new bitmask functions, fix bitmask use
Replace hardcoded protocol discriminator and message type bitmasks with
function calls recently introduced in libosmocore.
Note that the release 98 bitmasks slightly differ from the release 99 bitmasks.
This patch uses the "default" gsm48_hdr_msg_type invocation, thus it depends on
libosmocore whether 98 or 99 bitmasks are used.
In some places, use of the bitmask was erratic. Fix these implicitly by
employing the bitmask functions:
* silent_call.c: silent_call_reroute(): add missing bitmask for MM.
* bsc_msg_filter.c: bsc_msg_filter_initial(): RR vs. MM messages.
* osmo_bsc_filter.c: bsc_find_msc() and bsc_scan_bts_msg(): RR vs. MM
messages.
* bsc_nat_rewrite.c: bsc_nat_rewrite_msg(): SMS vs. CC messages.
* bsc_ussd.c: no bitmask is applicable for the message types used here.
* gb_proxy.c: gbproxy_imsi_acquisition(): missing bit mask for pdisc.
In gprs_gb_parse.c: gprs_gb_parse_dtap(), add a log notice for unexpected
message types.
diff --git a/openbsc/src/libmsc/gsm_04_08.c b/openbsc/src/libmsc/gsm_04_08.c
index d9d7390..9e70ba9 100644
--- a/openbsc/src/libmsc/gsm_04_08.c
+++ b/openbsc/src/libmsc/gsm_04_08.c
@@ -124,13 +124,12 @@
msg->lchan = trans->conn->lchan;
}
-
if (msg->lchan) {
struct e1inp_sign_link *sign_link =
msg->lchan->ts->trx->rsl_link;
msg->dst = sign_link;
- if ((gh->proto_discr & GSM48_PDISC_MASK) == GSM48_PDISC_CC)
+ if (gsm48_hdr_pdisc(gh) == GSM48_PDISC_CC)
DEBUGP(DCC, "(bts %d trx %d ts %d ti %02x) "
"Sending '%s' to MS.\n",
sign_link->trx->bts->nr,
@@ -1131,7 +1130,7 @@
struct gsm48_hdr *gh = msgb_l3(msg);
int rc = 0;
- switch (gh->msg_type & 0xbf) {
+ switch (gsm48_hdr_msg_type(gh)) {
case GSM48_MT_MM_LOC_UPD_REQUEST:
DEBUGP(DMM, "LOCATION UPDATING REQUEST: ");
rc = mm_rx_loc_upd_req(conn, msg);
@@ -1860,7 +1859,7 @@
static int gsm48_cc_rx_setup(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
- uint8_t msg_type = gh->msg_type & 0xbf;
+ uint8_t msg_type = gsm48_hdr_msg_type(gh);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct tlv_parsed tp;
struct gsm_mncc setup;
@@ -3487,7 +3486,7 @@
static int gsm0408_rcv_cc(struct gsm_subscriber_connection *conn, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
- uint8_t msg_type = gh->msg_type & 0xbf;
+ uint8_t msg_type = gsm48_hdr_msg_type(gh);
uint8_t transaction_id = ((gh->proto_discr & 0xf0) ^ 0x80) >> 4; /* flip */
struct gsm_trans *trans = NULL;
int i, rc = 0;
@@ -3578,7 +3577,7 @@
int gsm0408_dispatch(struct gsm_subscriber_connection *conn, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
- uint8_t pdisc = gh->proto_discr & 0x0f;
+ uint8_t pdisc = gsm48_hdr_pdisc(gh);
int rc = 0;
LOGP(DRLL, LOGL_DEBUG, "Dispatching 04.08 message, pdisc=%d\n", pdisc);