hnbgw: Bring all parts together
We now have the RUA and SUA parts interconnected by the
context ID mapper, and should be able to pass messages back and forward
between both sides.
Unfortunately this touches a bit of everything, but the structures are
all still very much in flux. Hopefully they will start to stabilize at
some point soon...
diff --git a/src/sccp_helpers.c b/src/sccp_helpers.c
new file mode 100644
index 0000000..ca580ea
--- /dev/null
+++ b/src/sccp_helpers.c
@@ -0,0 +1,137 @@
+/* SCCP User SAP helper functions (move to libosmo-sigtran?) */
+
+/* (C) 2015 by Harald Welte <laforge@gnumonks.org>
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <string.h>
+
+#include <osmocom/sigtran/sccp_sap.h>
+#include <osmocom/sigtran/sua.h>
+
+#include "sccp_helpers.h"
+
+int sccp_tx_unitdata(struct osmo_sua_link *link,
+ const struct osmo_sccp_addr *calling_addr,
+ const struct osmo_sccp_addr *called_addr,
+ uint8_t *data, unsigned int len)
+{
+ struct msgb *msg = msgb_alloc(1024, "sccp_tx_unitdata");
+ struct osmo_scu_prim *prim;
+ struct osmo_scu_unitdata_param *param;
+
+ prim = (struct osmo_scu_prim *) msgb_put(msg, sizeof(*prim));
+ param = &prim->u.unitdata;
+ param->calling_addr.presence = OSMO_SCCP_ADDR_T_SSN;
+ param->called_addr.presence = OSMO_SCCP_ADDR_T_SSN;
+ osmo_prim_init(&prim->oph, SCCP_SAP_USER, OSMO_SCU_PRIM_N_UNITDATA, PRIM_OP_REQUEST, msg);
+
+ msg->l2h = msgb_put(msg, len);
+ memcpy(msg->l2h, data, len);
+
+ return osmo_sua_user_link_down(link, &prim->oph);
+}
+
+int sccp_tx_unitdata_msg(struct osmo_sua_link *link,
+ const struct osmo_sccp_addr *calling_addr,
+ const struct osmo_sccp_addr *called_addr,
+ struct msgb *msg)
+{
+ int rc;
+
+ rc = sccp_tx_unitdata(link, calling_addr, called_addr,
+ msg->data, msgb_length(msg));
+ msgb_free(msg);
+
+ return rc;
+}
+
+
+#define SSN_RANAP 142
+void sccp_make_addr_pc_ssn(struct osmo_sccp_addr *addr, uint32_t pc, uint32_t ssn)
+{
+ addr->presence = OSMO_SCCP_ADDR_T_SSN | OSMO_SCCP_ADDR_T_PC;
+ addr->ssn = ssn;
+ addr->pc = pc;
+}
+
+int sccp_tx_conn_req(struct osmo_sua_link *link, uint32_t conn_id,
+ const struct osmo_sccp_addr *calling_addr,
+ const struct osmo_sccp_addr *called_addr,
+ uint8_t *data, unsigned int len)
+{
+ struct msgb *msg = msgb_alloc(1024, "sccp_tx_conn_req");
+ struct osmo_scu_prim *prim;
+
+ prim = (struct osmo_scu_prim *) msgb_put(msg, sizeof(*prim));
+ osmo_prim_init(&prim->oph, SCCP_SAP_USER,
+ OSMO_SCU_PRIM_N_CONNECT,
+ PRIM_OP_REQUEST, msg);
+ sccp_make_addr_pc_ssn(&prim->u.connect.calling_addr, 1, SSN_RANAP);
+ prim->u.connect.sccp_class = 2;
+ prim->u.connect.conn_id = conn_id;
+
+ if (data && len) {
+ msg->l2h = msgb_put(msg, len);
+ memcpy(msg->l2h, data, len);
+ }
+
+ return osmo_sua_user_link_down(link, &prim->oph);
+}
+
+int sccp_tx_conn_req_msg(struct osmo_sua_link *link, uint32_t conn_id,
+ const struct osmo_sccp_addr *calling_addr,
+ const struct osmo_sccp_addr *called_addr,
+ struct msgb *msg)
+{
+ int rc;
+
+ rc = sccp_tx_conn_req(link, conn_id, calling_addr, called_addr,
+ msg->data, msgb_length(msg));
+ msgb_free(msg);
+
+ return rc;
+}
+
+int sccp_tx_data(struct osmo_sua_link *link, uint32_t conn_id,
+ uint8_t *data, unsigned int len)
+{
+ struct msgb *msg = msgb_alloc(1024, "sccp_tx_data");
+ struct osmo_scu_prim *prim;
+
+ prim = (struct osmo_scu_prim *) msgb_put(msg, sizeof(*prim));
+ osmo_prim_init(&prim->oph, SCCP_SAP_USER,
+ OSMO_SCU_PRIM_N_DATA,
+ PRIM_OP_REQUEST, msg);
+ prim->u.data.conn_id = conn_id;
+
+ msg->l2h = msgb_put(msg, len);
+ memcpy(msg->l2h, data, len);
+
+ return osmo_sua_user_link_down(link, &prim->oph);
+}
+
+int sccp_tx_data_msg(struct osmo_sua_link *link, uint32_t conn_id,
+ struct msgb *msg)
+{
+ int rc;
+
+ rc = sccp_tx_data(link, conn_id, msg->data, msgb_length(msg));
+ msgb_free(msg);
+
+ return rc;
+}