138 lines
3.9 KiB
C
138 lines
3.9 KiB
C
/* SCCP User SAP helper functions (move to libosmo-sigtran?) */
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/* (C) 2015 by Harald Welte <laforge@gnumonks.org>
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <string.h>
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#include <osmocom/sigtran/sccp_sap.h>
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#include <osmocom/sigtran/sua.h>
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#include "sccp_helpers.h"
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int sccp_tx_unitdata(struct osmo_sua_link *link,
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const struct osmo_sccp_addr *calling_addr,
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const struct osmo_sccp_addr *called_addr,
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uint8_t *data, unsigned int len)
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{
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struct msgb *msg = msgb_alloc(1024, "sccp_tx_unitdata");
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struct osmo_scu_prim *prim;
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struct osmo_scu_unitdata_param *param;
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prim = (struct osmo_scu_prim *) msgb_put(msg, sizeof(*prim));
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param = &prim->u.unitdata;
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param->calling_addr.presence = OSMO_SCCP_ADDR_T_SSN;
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param->called_addr.presence = OSMO_SCCP_ADDR_T_SSN;
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osmo_prim_init(&prim->oph, SCCP_SAP_USER, OSMO_SCU_PRIM_N_UNITDATA, PRIM_OP_REQUEST, msg);
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msg->l2h = msgb_put(msg, len);
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memcpy(msg->l2h, data, len);
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return osmo_sua_user_link_down(link, &prim->oph);
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}
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int sccp_tx_unitdata_msg(struct osmo_sua_link *link,
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const struct osmo_sccp_addr *calling_addr,
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const struct osmo_sccp_addr *called_addr,
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struct msgb *msg)
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{
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int rc;
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rc = sccp_tx_unitdata(link, calling_addr, called_addr,
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msg->data, msgb_length(msg));
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msgb_free(msg);
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return rc;
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}
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#define SSN_RANAP 142
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void sccp_make_addr_pc_ssn(struct osmo_sccp_addr *addr, uint32_t pc, uint32_t ssn)
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{
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addr->presence = OSMO_SCCP_ADDR_T_SSN | OSMO_SCCP_ADDR_T_PC;
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addr->ssn = ssn;
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addr->pc = pc;
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}
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int sccp_tx_conn_req(struct osmo_sua_link *link, uint32_t conn_id,
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const struct osmo_sccp_addr *calling_addr,
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const struct osmo_sccp_addr *called_addr,
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uint8_t *data, unsigned int len)
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{
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struct msgb *msg = msgb_alloc(1024, "sccp_tx_conn_req");
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struct osmo_scu_prim *prim;
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prim = (struct osmo_scu_prim *) msgb_put(msg, sizeof(*prim));
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osmo_prim_init(&prim->oph, SCCP_SAP_USER,
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OSMO_SCU_PRIM_N_CONNECT,
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PRIM_OP_REQUEST, msg);
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sccp_make_addr_pc_ssn(&prim->u.connect.calling_addr, 1, SSN_RANAP);
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prim->u.connect.sccp_class = 2;
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prim->u.connect.conn_id = conn_id;
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if (data && len) {
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msg->l2h = msgb_put(msg, len);
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memcpy(msg->l2h, data, len);
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}
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return osmo_sua_user_link_down(link, &prim->oph);
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}
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int sccp_tx_conn_req_msg(struct osmo_sua_link *link, uint32_t conn_id,
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const struct osmo_sccp_addr *calling_addr,
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const struct osmo_sccp_addr *called_addr,
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struct msgb *msg)
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{
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int rc;
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rc = sccp_tx_conn_req(link, conn_id, calling_addr, called_addr,
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msg->data, msgb_length(msg));
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msgb_free(msg);
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return rc;
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}
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int sccp_tx_data(struct osmo_sua_link *link, uint32_t conn_id,
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uint8_t *data, unsigned int len)
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{
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struct msgb *msg = msgb_alloc(1024, "sccp_tx_data");
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struct osmo_scu_prim *prim;
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prim = (struct osmo_scu_prim *) msgb_put(msg, sizeof(*prim));
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osmo_prim_init(&prim->oph, SCCP_SAP_USER,
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OSMO_SCU_PRIM_N_DATA,
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PRIM_OP_REQUEST, msg);
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prim->u.data.conn_id = conn_id;
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msg->l2h = msgb_put(msg, len);
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memcpy(msg->l2h, data, len);
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return osmo_sua_user_link_down(link, &prim->oph);
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}
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int sccp_tx_data_msg(struct osmo_sua_link *link, uint32_t conn_id,
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struct msgb *msg)
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{
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int rc;
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rc = sccp_tx_data(link, conn_id, msg->data, msgb_length(msg));
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msgb_free(msg);
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return rc;
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}
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