GPRS: Introduce a GPRS Gb Proxy
The ida of the Gb proxy is to aggregate Gb links with a number of BSS
and then present all the BSSGP-VC's together inside one NS-VC to the
actual SGSN.
The code is not yet expected to be complete.
diff --git a/openbsc/src/gprs_ns.c b/openbsc/src/gprs_ns.c
index 6c495b0..3bb0bf9 100644
--- a/openbsc/src/gprs_ns.c
+++ b/openbsc/src/gprs_ns.c
@@ -72,30 +72,6 @@
},
};
-#define NSE_S_BLOCKED 0x0001
-#define NSE_S_ALIVE 0x0002
-
-struct gprs_nsvc {
- struct llist_head list;
- struct gprs_ns_inst *nsi;
-
- u_int16_t nsei; /* end-to-end significance */
- u_int16_t nsvci; /* uniquely identifies NS-VC at SGSN */
-
- u_int32_t state;
- u_int32_t remote_state;
-
- struct timer_list alive_timer;
- int timer_is_tns_alive;
- int alive_retries;
-
- union {
- struct {
- struct sockaddr_in bts_addr;
- } ip;
- };
-};
-
enum gprs_ns_ll {
GPRS_NS_LL_UDP,
GPRS_NS_LL_E1,
@@ -474,7 +450,7 @@
nsi->cb = cb;
INIT_LLIST_HEAD(&nsi->gprs_nsvcs);
- return NULL;
+ return nsi;
}
void gprs_ns_destroy(struct gprs_ns_inst *nsi)
@@ -586,3 +562,24 @@
return ret;
}
+
+/* Establish a connection (from the BSS) to the SGSN */
+struct gprs_nsvc *nsip_connect(struct gprs_ns_inst *nsi,
+ struct sockaddr_in *dest, uint16_t nsvci)
+{
+ struct gprs_nsvc *nsvc;
+
+ nsvc = nsvc_by_rem_addr(nsi, dest);
+ if (!nsvc) {
+ nsvc = nsvc_create(nsi, nsvci);
+ nsvc->ip.bts_addr = *dest;
+ }
+ nsvc->remote_end_is_sgsn = 1;
+
+ /* Initiate a RESET procedure */
+ if (gprs_ns_tx_simple(nsvc, NS_PDUT_RESET) < 0)
+ return NULL;
+ /* FIXME: should we run a timer and re-transmit the reset request? */
+
+ return nsvc;
+}