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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <osmocom/core/utils.h>
#include <osmocom/core/logging.h>
#include <osmocom/sigtran/sccp_sap.h>
#include <osmocom/sigtran/sccp_helpers.h>
#include "internal.h"
unsigned int conn_id =1;
/* a simple SCCP User which refuses all connections and discards all
* unitdata */
static int refuser_prim_cb(struct osmo_prim_hdr *oph, void *_scu)
{
struct osmo_sccp_user *scu = _scu;
struct osmo_scu_prim *scu_prim = (struct osmo_scu_prim *) oph;
switch (OSMO_PRIM_HDR(&scu_prim->oph)) {
case OSMO_PRIM(OSMO_SCU_PRIM_N_CONNECT, PRIM_OP_INDICATION):
LOGP(DMAIN, LOGL_INFO, "refusing N-CONNECT.ind (local_ref=%u)\n",
scu_prim->u.connect.conn_id);
osmo_sccp_tx_disconn(scu, scu_prim->u.connect.conn_id,
&scu_prim->u.connect.called_addr,
23);
break;
default:
LOGP(DMAIN, LOGL_NOTICE, "Unknown primitive %s\n",
osmo_scu_prim_name(oph));
break;
}
msgb_free(oph->msg);
return 0;
}
/* a simple SCCP User which accepts all connections and echos back all
* DATA + UNITDATA */
static int echo_prim_cb(struct osmo_prim_hdr *oph, void *_scu)
{
struct osmo_sccp_user *scu = _scu;
struct osmo_scu_prim *scu_prim = (struct osmo_scu_prim *) oph;
const uint8_t *data = msgb_l2(oph->msg);
unsigned int data_len = msgb_l2len(oph->msg);
switch (OSMO_PRIM_HDR(&scu_prim->oph)) {
case OSMO_PRIM(OSMO_SCU_PRIM_N_CONNECT, PRIM_OP_INDICATION):
LOGP(DMAIN, LOGL_INFO, "Accepting N-CONNECT.ind (local_ref=%u)\n",
scu_prim->u.connect.conn_id);
osmo_sccp_tx_conn_resp(scu, scu_prim->u.connect.conn_id,
&scu_prim->u.connect.called_addr,
data, data_len);
break;
case OSMO_PRIM(OSMO_SCU_PRIM_N_DATA, PRIM_OP_INDICATION):
LOGP(DMAIN, LOGL_INFO, "Echoing N-DATA.ind (local_ref=%u)\n",
scu_prim->u.data.conn_id);
osmo_sccp_tx_data(scu, scu_prim->u.data.conn_id,
data, data_len);
break;
case OSMO_PRIM(OSMO_SCU_PRIM_N_UNITDATA, PRIM_OP_INDICATION):
LOGP(DMAIN, LOGL_INFO, "Echoing N-UNITDATA.ind\n");
osmo_sccp_tx_unitdata(scu, &scu_prim->u.unitdata.called_addr,
&scu_prim->u.unitdata.calling_addr,
data, data_len);
break;
case OSMO_PRIM(OSMO_SCU_PRIM_N_DISCONNECT, PRIM_OP_INDICATION):
LOGP(DMAIN, LOGL_INFO, "Got N-DISCONNECT.ind (local_ref=%u, cause=%u, importance=%u)\n",
scu_prim->u.disconnect.conn_id, scu_prim->u.disconnect.cause,
scu_prim->u.disconnect.importance);
break;
default:
LOGP(DMAIN, LOGL_NOTICE, "Unknown primitive %s\n",
osmo_scu_prim_name(oph));
break;
}
msgb_free(oph->msg);
return 0;
}
/* a simple SCCP User which receives UNITDATA messages and connects back
* to whoever sents UNITDATA and then echo's back all DATA */
static int callback_prim_cb(struct osmo_prim_hdr *oph, void *_scu)
{
struct osmo_sccp_user *scu = _scu;
struct osmo_scu_prim *scu_prim = (struct osmo_scu_prim *) oph;
const uint8_t *data = msgb_l2(oph->msg);
unsigned int data_len = msgb_l2len(oph->msg);
switch (OSMO_PRIM_HDR(&scu_prim->oph)) {
case OSMO_PRIM(OSMO_SCU_PRIM_N_UNITDATA, PRIM_OP_INDICATION):
LOGP(DMAIN, LOGL_INFO, "N-UNITDATA.ind: Connecting back to sender\n");
osmo_sccp_tx_conn_req(scu, conn_id++,
&scu_prim->u.unitdata.called_addr,
&scu_prim->u.unitdata.calling_addr,
data, data_len);
break;
case OSMO_PRIM(OSMO_SCU_PRIM_N_DATA, PRIM_OP_INDICATION):
LOGP(DMAIN, LOGL_INFO, "Echoing N-DATA.ind (local_ref=%u)\n",
scu_prim->u.data.conn_id);
osmo_sccp_tx_data(scu, scu_prim->u.data.conn_id,
data, data_len);
break;
default:
LOGP(DMAIN, LOGL_NOTICE, "Unknown primitive %s\n",
osmo_scu_prim_name(oph));
break;
}
msgb_free(oph->msg);
return 0;
}
int sccp_test_server_init(struct osmo_sccp_instance *sccp)
{
osmo_sccp_user_bind(sccp, "refuser", &refuser_prim_cb, SSN_TEST_REFUSE);
osmo_sccp_user_bind(sccp, "echo", &echo_prim_cb, SSN_TEST_ECHO);
osmo_sccp_user_bind(sccp, "callback", &callback_prim_cb, SSN_TEST_CALLBACK);
return 0;
}
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