122 lines
3.6 KiB
C
122 lines
3.6 KiB
C
/* (C) 2016 by Harald Welte <laforge@gnumonks.org>
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*
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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 <errno.h>
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/hlr/logging.h>
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#include <osmocom/hlr/gsup_server.h>
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#include <osmocom/hlr/gsup_router.h>
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/*! Find a route for the given address.
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* \param[in] gs gsup server
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* \param[in] addr IPA name of the client (SGSN, MSC/VLR). Although this is passed like a blob, together with the
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* length, it must be nul-terminated! This is for legacy reasons, see the discussion here:
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* https://gerrit.osmocom.org/#/c/osmo-hlr/+/13048/
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* \param[in] addrlen length of addr, *including the nul-byte* (strlen(addr) + 1).
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*/
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struct osmo_gsup_conn *gsup_route_find(struct osmo_gsup_server *gs,
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const uint8_t *addr, size_t addrlen)
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{
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struct gsup_route *gr;
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llist_for_each_entry(gr, &gs->routes, list) {
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if (talloc_total_size(gr->addr) == addrlen &&
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!memcmp(gr->addr, addr, addrlen))
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return gr->conn;
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}
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return NULL;
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}
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struct osmo_gsup_conn *gsup_route_find_by_ipa_name(struct osmo_gsup_server *gs, const struct osmo_ipa_name *ipa_name)
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{
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return gsup_route_find(gs, ipa_name->val, ipa_name->len);
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}
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/*! Find a GSUP connection's route (to read the IPA address from the route).
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* \param[in] conn GSUP connection
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* \return GSUP route
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*/
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struct gsup_route *gsup_route_find_by_conn(const struct osmo_gsup_conn *conn)
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{
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struct gsup_route *gr;
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llist_for_each_entry(gr, &conn->server->routes, list) {
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if (gr->conn == conn)
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return gr;
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}
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return NULL;
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}
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/* add a new route for the given address to the given conn */
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int gsup_route_add(struct osmo_gsup_conn *conn, const uint8_t *addr, size_t addrlen)
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{
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struct gsup_route *gr;
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struct osmo_gsup_conn *exists_on_conn;
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/* Check if we already have a route for this address */
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exists_on_conn = gsup_route_find(conn->server, addr, addrlen);
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if (exists_on_conn) {
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if (exists_on_conn != conn)
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return -EEXIST;
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return 0;
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}
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/* allocate new route and populate it */
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gr = talloc_zero(conn->server, struct gsup_route);
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if (!gr)
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return -ENOMEM;
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LOGP(DMAIN, LOGL_INFO, "Adding GSUP route for %s via %s:%u\n", addr, conn->conn->addr, conn->conn->port);
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gr->addr = talloc_memdup(gr, addr, addrlen);
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gr->conn = conn;
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llist_add_tail(&gr->list, &conn->server->routes);
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return 0;
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}
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int gsup_route_add_ipa_name(struct osmo_gsup_conn *conn, const struct osmo_ipa_name *ipa_name)
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{
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return gsup_route_add(conn, ipa_name->val, ipa_name->len);
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}
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/* delete all routes for the given connection */
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int gsup_route_del_conn(struct osmo_gsup_conn *conn)
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{
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struct gsup_route *gr, *gr2;
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unsigned int num_deleted = 0;
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llist_for_each_entry_safe(gr, gr2, &conn->server->routes, list) {
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if (gr->conn == conn) {
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LOGP(DMAIN, LOGL_INFO, "Removing GSUP route for %s (GSUP disconnect)\n",
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osmo_quote_str_c(OTC_SELECT, (char*)gr->addr, talloc_total_size(gr->addr)));
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llist_del(&gr->list);
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talloc_free(gr);
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num_deleted++;
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}
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}
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return num_deleted;
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}
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