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/* (C) 2018 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
*
* 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/>.
*
*/
/* This is kept separate to be able to override the actual sending functions from unit tests. */
#include <errno.h>
#include <osmocom/hlr/gsup_server.h>
#include <osmocom/hlr/gsup_router.h>
#include <osmocom/core/logging.h>
/*! Send a msgb to a given address using routing.
* \param[in] gs gsup server
* \param[in] addr IPA name of the client (SGSN, MSC/VLR). Although this is passed like a blob, together with the
* length, it must be nul-terminated! This is for legacy reasons, see the discussion here:
* https://gerrit.osmocom.org/#/c/osmo-hlr/+/13048/
* \param[in] addrlen length of addr, *including the nul-byte* (strlen(addr) + 1).
* \param[in] msg message buffer
*/
int osmo_gsup_addr_send(struct osmo_gsup_server *gs,
const uint8_t *addr, size_t addrlen,
struct msgb *msg)
{
struct osmo_gsup_conn *conn;
conn = gsup_route_find(gs, addr, addrlen);
if (!conn) {
LOGP(DLGSUP, LOGL_ERROR,
"Cannot find route for addr %s\n", osmo_quote_str((const char*)addr, addrlen));
msgb_free(msg);
return -ENODEV;
}
return osmo_gsup_conn_send(conn, msg);
}
/*! Send a msgb to a given address using routing.
* \param[in] gs gsup server
* \param[in] ipa_name IPA unit name of the client (SGSN, MSC/VLR, proxy).
* \param[in] msg message buffer
*/
int osmo_gsup_send_to_ipa_name(struct osmo_gsup_server *gs, const struct osmo_ipa_name *ipa_name, struct msgb *msg)
{
if (ipa_name->val[ipa_name->len - 1]) {
/* Is not nul terminated. But for legacy reasons we (still) require that. */
if (ipa_name->len >= sizeof(ipa_name->val)) {
LOGP(DLGSUP, LOGL_ERROR, "IPA unit name is too long: %s\n",
osmo_ipa_name_to_str(ipa_name));
return -EINVAL;
}
struct osmo_ipa_name ipa_name2 = *ipa_name;
ipa_name2.val[ipa_name->len] = '\0';
ipa_name2.len++;
return osmo_gsup_addr_send(gs, ipa_name2.val, ipa_name2.len, msg);
}
return osmo_gsup_addr_send(gs, ipa_name->val, ipa_name->len, msg);
}
int osmo_gsup_enc_send_to_ipa_name(struct osmo_gsup_server *gs, const struct osmo_ipa_name *ipa_name,
const struct osmo_gsup_message *gsup)
{
struct msgb *msg = osmo_gsup_msgb_alloc("GSUP Tx");
int rc;
rc = osmo_gsup_encode(msg, gsup);
if (rc) {
LOGP(DLGSUP, LOGL_ERROR, "IMSI-%s: Cannot encode GSUP: %s\n",
gsup->imsi, osmo_gsup_message_type_name(gsup->message_type));
msgb_free(msg);
return -EINVAL;
}
LOGP(DLGSUP, LOGL_DEBUG, "IMSI-%s: Tx: %s\n", gsup->imsi, osmo_gsup_message_type_name(gsup->message_type));
return osmo_gsup_send_to_ipa_name(gs, ipa_name, msg);
}
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