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/libbsc/bsc_api.c b/openbsc/src/libbsc/bsc_api.c
index 504f044..e6d820d 100644
--- a/openbsc/src/libbsc/bsc_api.c
+++ b/openbsc/src/libbsc/bsc_api.c
@@ -563,6 +563,7 @@
struct bsc_api *api = msg->lchan->ts->trx->bts->network->bsc_api;
struct gsm48_hdr *gh;
uint8_t pdisc;
+ uint8_t msg_type;
int rc;
if (msgb_l3len(msg) < sizeof(*gh)) {
@@ -571,7 +572,8 @@
}
gh = msgb_l3(msg);
- pdisc = gh->proto_discr & 0x0f;
+ pdisc = gsm48_hdr_pdisc(gh);
+ msg_type = gsm48_hdr_msg_type(gh);
/* the idea is to handle all RR messages here, and only hand
* MM/CC/SMS-CP/LCS up to the MSC. Some messages like PAGING
@@ -581,7 +583,7 @@
* will call api->compl_l3() for it */
switch (pdisc) {
case GSM48_PDISC_RR:
- switch (gh->msg_type) {
+ switch (msg_type) {
case GSM48_MT_RR_GPRS_SUSP_REQ:
DEBUGP(DRR, "GRPS SUSPEND REQUEST\n");
break;
@@ -640,7 +642,7 @@
* messages, but we'd rather forward what we
* don't know than drop it... */
LOGP(DRR, LOGL_NOTICE, "BSC: Passing unknown 04.08 "
- "RR message type 0x%02x to MSC\n", gh->msg_type);
+ "RR message type 0x%02x to MSC\n", msg_type);
if (api->dtap)
api->dtap(conn, link_id, msg);
}