| /* (C) 2016 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 <errno.h> |
| |
| #include <osmocom/core/linuxlist.h> |
| #include <osmocom/core/talloc.h> |
| |
| #include <osmocom/hlr/logging.h> |
| #include <osmocom/hlr/gsup_server.h> |
| #include <osmocom/hlr/gsup_router.h> |
| |
| /*! Find a route for the given address. |
| * \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). |
| */ |
| struct osmo_gsup_conn *gsup_route_find(struct osmo_gsup_server *gs, |
| const uint8_t *addr, size_t addrlen) |
| { |
| struct gsup_route *gr; |
| |
| llist_for_each_entry(gr, &gs->routes, list) { |
| if (talloc_total_size(gr->addr) == addrlen && |
| !memcmp(gr->addr, addr, addrlen)) |
| return gr->conn; |
| } |
| return NULL; |
| } |
| |
| struct osmo_gsup_conn *gsup_route_find_by_ipa_name(struct osmo_gsup_server *gs, const struct osmo_ipa_name *ipa_name) |
| { |
| return gsup_route_find(gs, ipa_name->val, ipa_name->len); |
| } |
| |
| /*! Find a GSUP connection's route (to read the IPA address from the route). |
| * \param[in] conn GSUP connection |
| * \return GSUP route |
| */ |
| struct gsup_route *gsup_route_find_by_conn(const struct osmo_gsup_conn *conn) |
| { |
| struct gsup_route *gr; |
| |
| llist_for_each_entry(gr, &conn->server->routes, list) { |
| if (gr->conn == conn) |
| return gr; |
| } |
| |
| return NULL; |
| } |
| |
| /* add a new route for the given address to the given conn */ |
| int gsup_route_add(struct osmo_gsup_conn *conn, const uint8_t *addr, size_t addrlen) |
| { |
| struct gsup_route *gr; |
| struct osmo_gsup_conn *exists_on_conn; |
| |
| /* Check if we already have a route for this address */ |
| exists_on_conn = gsup_route_find(conn->server, addr, addrlen); |
| if (exists_on_conn) { |
| if (exists_on_conn != conn) |
| return -EEXIST; |
| return 0; |
| } |
| |
| /* allocate new route and populate it */ |
| gr = talloc_zero(conn->server, struct gsup_route); |
| if (!gr) |
| return -ENOMEM; |
| |
| LOGP(DMAIN, LOGL_INFO, "Adding GSUP route for %s via %s:%u\n", addr, conn->conn->addr, conn->conn->port); |
| |
| gr->addr = talloc_memdup(gr, addr, addrlen); |
| gr->conn = conn; |
| llist_add_tail(&gr->list, &conn->server->routes); |
| |
| return 0; |
| } |
| |
| int gsup_route_add_ipa_name(struct osmo_gsup_conn *conn, const struct osmo_ipa_name *ipa_name) |
| { |
| return gsup_route_add(conn, ipa_name->val, ipa_name->len); |
| } |
| |
| /* delete all routes for the given connection */ |
| int gsup_route_del_conn(struct osmo_gsup_conn *conn) |
| { |
| struct gsup_route *gr, *gr2; |
| unsigned int num_deleted = 0; |
| |
| llist_for_each_entry_safe(gr, gr2, &conn->server->routes, list) { |
| if (gr->conn == conn) { |
| LOGP(DMAIN, LOGL_INFO, "Removing GSUP route for %s (GSUP disconnect)\n", |
| osmo_quote_str_c(OTC_SELECT, (char*)gr->addr, talloc_total_size(gr->addr))); |
| llist_del(&gr->list); |
| talloc_free(gr); |
| num_deleted++; |
| } |
| } |
| |
| return num_deleted; |
| } |