From e687be5f2db2302c82ee2b0bffa1c6f69b5fe278 Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Tue, 3 May 2016 18:49:27 +0200 Subject: Major update; Code now supports SAI, LU and ISD transactions We also introduce a 'gsup_router' which enables us to route a transaction to a given VLR. It works based on the SERIAL attribute communicated at time of the IPA multiplex setup as part of the CCM sub-protocol. --- src/gsup_router.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 src/gsup_router.c (limited to 'src/gsup_router.c') diff --git a/src/gsup_router.c b/src/gsup_router.c new file mode 100644 index 0000000..e9aed78 --- /dev/null +++ b/src/gsup_router.c @@ -0,0 +1,85 @@ +/* (C) 2016 by Harald Welte + * + * 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 . + * + */ + + +#include + +#include +#include + +#include "gsup_server.h" + +struct gsup_route { + struct llist_head list; + + uint8_t *addr; + struct osmo_gsup_conn *conn; +}; + +/* find a route for the given address */ +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; +} + +/* 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; + + /* Check if we already have a route for this address */ + if (gsup_route_find(conn->server, addr, addrlen)) + return -EEXIST; + + /* allocate new route and populate it */ + gr = talloc_zero(conn->server, struct gsup_route); + if (!gr) + return -ENOMEM; + + gr->addr = talloc_memdup(gr, addr, addrlen); + gr->conn = conn; + llist_add_tail(&gr->list, &conn->server->routes); + + return 0; +} + +/* 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) { + llist_del(&gr->list); + talloc_free(gr); + num_deleted++; + } + } + + return num_deleted; +} -- cgit v1.2.3