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/* 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;
}
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