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#include <stdio.h>
#include <unistd.h>
#include <stdint.h>
#include <errno.h>
#include <string.h>
#include <netinet/in.h>
#include <smpp34.h>
#include <smpp34_structs.h>
#include <smpp34_params.h>
#include <osmocom/core/application.h>
#include <osmocom/core/utils.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/select.h>
#include <osmocom/core/socket.h>
#include <osmocom/core/write_queue.h>
#include <osmocom/msc/debug.h>
#include <osmocom/msc/smpp.h>
/* FIXME: merge with smpp_smsc.c */
static struct tlv_t *find_tlv(struct tlv_t *head, uint16_t tag)
{
struct tlv_t *t;
for (t = head; t != NULL; t = t->next) {
if (t->tag == tag)
return t;
}
return NULL;
}
static int smpp_handle_deliver(struct esme *esme, struct msgb *msg)
{
struct deliver_sm_t deliver;
struct deliver_sm_resp_t deliver_r;
struct submit_sm_t submit;
tlv_t *t;
int rc;
memset(&deliver, 0, sizeof(deliver));
SMPP34_UNPACK(rc, DELIVER_SM, &deliver, msgb_data(msg), msgb_length(msg));
if (rc < 0)
return rc;
INIT_RESP(DELIVER_SM_RESP, &deliver_r, &deliver);
PACK_AND_SEND(esme, &deliver_r);
memset(&submit, 0, sizeof(submit));
submit.command_id = SUBMIT_SM;
submit.command_status = ESME_ROK;
submit.sequence_number = esme_inc_seq_nr(esme);
submit.dest_addr_ton = deliver.source_addr_ton;
submit.dest_addr_npi = deliver.source_addr_npi;
memcpy(submit.destination_addr, deliver.source_addr,
OSMO_MIN(sizeof(submit.destination_addr),
sizeof(deliver.source_addr)));
submit.source_addr_ton = deliver.dest_addr_ton;
submit.source_addr_npi = deliver.dest_addr_npi;
memcpy(submit.source_addr, deliver.destination_addr,
OSMO_MIN(sizeof(submit.source_addr),
sizeof(deliver.destination_addr)));
/* Mirror delivery receipts as a delivery acknowledgements. */
if (deliver.esm_class == 0x04) {
LOGP(DSMPP, LOGL_DEBUG, "%s\n", deliver.short_message);
submit.esm_class = 0x08;
} else {
submit.esm_class = deliver.esm_class;
}
submit.registered_delivery = deliver.registered_delivery;
submit.protocol_id = deliver.protocol_id;
submit.priority_flag = deliver.priority_flag;
memcpy(submit.schedule_delivery_time, deliver.schedule_delivery_time,
OSMO_MIN(sizeof(submit.schedule_delivery_time),
sizeof(deliver.schedule_delivery_time)));
memcpy(submit.validity_period, deliver.validity_period,
OSMO_MIN(sizeof(submit.validity_period),
sizeof(deliver.validity_period)));
submit.registered_delivery = deliver.registered_delivery;
submit.replace_if_present_flag = deliver.replace_if_present_flag;
submit.data_coding = deliver.data_coding;
submit.sm_default_msg_id = deliver.sm_default_msg_id;
submit.sm_length = deliver.sm_length;
memcpy(submit.short_message, deliver.short_message,
OSMO_MIN(sizeof(submit.short_message),
sizeof(deliver.short_message)));
/* FIXME: More TLV? */
t = find_tlv(deliver.tlv, TLVID_user_message_reference);
if (t) {
tlv_t tlv;
memset(&tlv, 0, sizeof(tlv));
tlv.tag = TLVID_user_message_reference;
tlv.length = 2;
tlv.value.val16 = t->value.val16;
build_tlv(&submit.tlv, &tlv);
}
return PACK_AND_SEND(esme, &submit);
}
static int bind_transceiver(struct esme *esme)
{
struct bind_transceiver_t bind;
memset(&bind, 0, sizeof(bind));
bind.command_id = BIND_TRANSCEIVER;
bind.sequence_number = esme_inc_seq_nr(esme);
snprintf((char *)bind.system_id, sizeof(bind.system_id), "%s", esme->system_id);
snprintf((char *)bind.password, sizeof(bind.password), "%s", esme->password);
snprintf((char *)bind.system_type, sizeof(bind.system_type), "mirror");
bind.interface_version = esme->smpp_version;
return PACK_AND_SEND(esme, &bind);
}
static int smpp_pdu_rx(struct esme *esme, struct msgb *msg)
{
uint32_t cmd_id = smpp_msgb_cmdid(msg);
int rc;
switch (cmd_id) {
case DELIVER_SM:
rc = smpp_handle_deliver(esme, msg);
break;
default:
LOGP(DSMPP, LOGL_NOTICE, "unhandled case %d\n", cmd_id);
rc = 0;
break;
}
return rc;
}
static int esme_read_cb(struct osmo_fd *ofd)
{
struct esme *esme = ofd->data;
int rc = esme_read_callback(esme, ofd->fd);
switch (rc) {
case 1:
rc = smpp_pdu_rx(esme, esme->read_msg);
esme_read_state_reset(esme);
break;
case -EBADF:
exit(2342);
break;
default:
return rc;
}
return 0;
}
static int esme_write_cb(struct osmo_fd *ofd, struct msgb *msg)
{
if (esme_write_callback(ofd->data, ofd->fd, msg) == 0)
exit(99);
return 0;
}
static int smpp_esme_init(struct esme *esme, const char *host, uint16_t port)
{
int rc;
if (port == 0)
port = SMPP_DEFAULT_PORT;
esme->own_seq_nr = rand();
esme_inc_seq_nr(esme);
osmo_wqueue_init(&esme->wqueue, 10);
esme->wqueue.bfd.data = esme;
esme->wqueue.read_cb = esme_read_cb;
esme->wqueue.write_cb = esme_write_cb;
rc = osmo_sock_init_ofd(&esme->wqueue.bfd, AF_UNSPEC, SOCK_STREAM,
IPPROTO_TCP, host, port, OSMO_SOCK_F_CONNECT);
if (rc < 0)
return rc;
return bind_transceiver(esme);
}
static const struct log_info_cat smpp_mirror_default_categories[] = {
[DSMPP] = {
.name = "DSMPP",
.description = "SMPP interface for external SMS apps",
.enabled = 1, .loglevel = LOGL_DEBUG,
},
};
const struct log_info log_info = {
.cat = smpp_mirror_default_categories,
.num_cat = ARRAY_SIZE(smpp_mirror_default_categories),
};
int main(int argc, char **argv)
{
struct esme esme;
char *host = "localhost";
int port = 0;
int rc;
void *ctx = talloc_named_const(NULL, 0, "smpp_mirror");
msgb_talloc_ctx_init(ctx, 0);
memset(&esme, 0, sizeof(esme));
osmo_init_logging2(ctx, &log_info);
snprintf((char *) esme.system_id, sizeof(esme.system_id), "mirror");
snprintf((char *) esme.password, sizeof(esme.password), "mirror");
esme.smpp_version = 0x34;
if (argc >= 2)
host = argv[1];
if (argc >= 3)
port = atoi(argv[2]);
rc = smpp_esme_init(&esme, host, port);
if (rc < 0)
exit(1);
while (1) {
osmo_select_main(0);
}
exit(0);
}
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