157 lines
5.0 KiB
C
157 lines
5.0 KiB
C
/* Copyright 2019 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
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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 General Public License as published by
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* the Free Software Foundation; either version 2 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <osmocom/hlr/logging.h>
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#include <osmocom/mslookup/mslookup_client.h>
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#include <osmocom/mslookup/mslookup_client_fake.h>
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#include <string.h>
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/* Fake mslookup method */
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struct fake_lookup_state {
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struct osmo_mslookup_client *client;
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struct llist_head requests;
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struct osmo_timer_list async_response_timer;
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struct osmo_mslookup_fake_response *responses;
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size_t responses_len;
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};
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struct fake_lookup_request {
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struct llist_head entry;
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uint32_t request_handle;
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struct osmo_mslookup_query query;
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struct timeval received_at;
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};
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/*! Args for osmo_timer_schedule: seconds and microseconds. */
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#define ASYNC_RESPONSE_PERIOD 0, (1e6 / 10)
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static void fake_lookup_async_response(void *state);
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static void fake_lookup_request(struct osmo_mslookup_client_method *method,
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const struct osmo_mslookup_query *query,
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uint32_t request_handle)
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{
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struct fake_lookup_state *state = method->priv;
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char buf[256];
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LOGP(DMSLOOKUP, LOGL_DEBUG, "%s(%s)\n", __func__, osmo_mslookup_result_name_b(buf, sizeof(buf), query, NULL));
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/* A real implementation would send packets to some remote server.
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* Here this is simulated: add to the list of requests, which fake_lookup_async_response() will reply upon
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* according to the test data listing the replies that the test wants to generate. */
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struct fake_lookup_request *r = talloc_zero(method->client, struct fake_lookup_request);
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*r = (struct fake_lookup_request){
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.request_handle = request_handle,
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.query = *query,
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};
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osmo_gettimeofday(&r->received_at, NULL);
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llist_add_tail(&r->entry, &state->requests);
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}
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static void fake_lookup_request_cleanup(struct osmo_mslookup_client_method *method,
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uint32_t request_handle)
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{
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struct fake_lookup_state *state = method->priv;
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/* Tear down any state associated with this handle. */
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struct fake_lookup_request *r;
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llist_for_each_entry(r, &state->requests, entry) {
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if (r->request_handle != request_handle)
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continue;
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llist_del(&r->entry);
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talloc_free(r);
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LOGP(DMSLOOKUP, LOGL_DEBUG, "%s() ok\n", __func__);
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return;
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}
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LOGP(DMSLOOKUP, LOGL_DEBUG, "%s() FAILED\n", __func__);
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}
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static void fake_lookup_async_response(void *data)
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{
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struct fake_lookup_state *state = data;
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struct fake_lookup_request *req, *n;
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struct timeval now;
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char str[256];
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osmo_gettimeofday(&now, NULL);
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llist_for_each_entry_safe(req, n, &state->requests, entry) {
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struct osmo_mslookup_fake_response *resp;
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for (resp = state->responses;
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(resp - state->responses) < state->responses_len;
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resp++) {
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struct timeval diff;
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if (resp->sent)
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continue;
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if (osmo_mslookup_id_cmp(&req->query.id, &resp->for_id) != 0)
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continue;
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if (strcmp(req->query.service, resp->for_service) != 0)
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continue;
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timersub(&now, &req->received_at, &diff);
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if (timercmp(&diff, &resp->time_to_reply, <))
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continue;
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/* It's time to reply to this request. */
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LOGP(DMSLOOKUP, LOGL_DEBUG, "osmo_mslookup_client_rx_result(): %s\n",
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osmo_mslookup_result_name_b(str, sizeof(str), &req->query, &resp->result));
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osmo_mslookup_client_rx_result(state->client, req->request_handle, &resp->result);
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resp->sent = true;
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/* The req will have been cleaned up now, so we must not iterate over state->responses anymore
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* with this req. */
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break;
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}
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}
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osmo_timer_schedule(&state->async_response_timer, ASYNC_RESPONSE_PERIOD);
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}
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struct osmo_mslookup_client_method *osmo_mslookup_client_add_fake(struct osmo_mslookup_client *client,
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struct osmo_mslookup_fake_response *responses,
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size_t responses_len)
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{
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struct osmo_mslookup_client_method *method = talloc_zero(client, struct osmo_mslookup_client_method);
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OSMO_ASSERT(method);
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struct fake_lookup_state *state = talloc_zero(method, struct fake_lookup_state);
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OSMO_ASSERT(state);
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*state = (struct fake_lookup_state){
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.client = client,
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.responses = responses,
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.responses_len = responses_len,
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};
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INIT_LLIST_HEAD(&state->requests);
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*method = (struct osmo_mslookup_client_method){
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.name = "fake",
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.priv = state,
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.request = fake_lookup_request,
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.request_cleanup = fake_lookup_request_cleanup,
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};
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osmo_timer_setup(&state->async_response_timer, fake_lookup_async_response, state);
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osmo_mslookup_client_method_add(client, method);
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osmo_timer_schedule(&state->async_response_timer, ASYNC_RESPONSE_PERIOD);
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return method;
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}
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