136 lines
3.8 KiB
C
136 lines
3.8 KiB
C
/* Osmocom CBC (Cell Broacast Centre) */
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/* (C) 2019 by Harald Welte <laforge@gnumonks.org>
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* All Rights Reserved
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*
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* SPDX-License-Identifier: AGPL-3.0+
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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 <pthread.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/core/it_q.h>
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#include <osmocom/cbc/cbc_data.h>
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#include <osmocom/cbc/rest_it_op.h>
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#include <osmocom/cbc/debug.h>
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/***********************************************************************
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* HTTP THREAD
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***********************************************************************/
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/* allocate an inter-thread operation */
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struct rest_it_op *rest_it_op_alloc(void *ctx)
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{
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struct rest_it_op *op = talloc_zero(ctx, struct rest_it_op);
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if (!op)
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return NULL;
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pthread_mutex_init(&op->mutex, NULL);
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pthread_cond_init(&op->cond, NULL);
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/* set a 'safe' default for all kinds of error situations */
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rest_it_op_set_http_result(op, 500, "Internal Server Error");
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return op;
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}
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/* enqueue an inter-thread operation in REST->main direction and wait for its completion */
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int rest_it_op_send_and_wait(struct rest_it_op *op)
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{
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int rc = 0;
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LOGP(DREST, LOGL_DEBUG, "rest_it_op enqueue from %lu\n", pthread_self());
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rc = osmo_it_q_enqueue(g_cbc->it_q.rest2main, op, list);
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if (rc < 0)
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return rc;
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/* grab mutex before pthread_cond_wait() */
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pthread_mutex_lock(&op->mutex);
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LOGP(DREST, LOGL_DEBUG, "rest_it_op wait....\n");
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rc = pthread_cond_wait(&op->cond, &op->mutex);
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LOGP(DREST, LOGL_DEBUG, "rest_it_op completed with %d (HTTP %u)\n",
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rc, op->http_result.response_code);
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pthread_mutex_unlock(&op->mutex);
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/* 'op' is implicitly owned by the caller again now, who needs to take care
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* of releasing its memory */
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return rc;
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}
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/***********************************************************************
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* MAIN THREAD
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***********************************************************************/
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void rest2main_read_cb(struct osmo_it_q *q, struct llist_head *item)
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{
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struct rest_it_op *op = container_of(item, struct rest_it_op, list);
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struct cbc_message *cbc_msg;
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LOGP(DREST, LOGL_DEBUG, "%s(op=%p) from %lu\n", __func__, op, pthread_self());
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/* FIXME: look up related message and dispatch to message FSM,
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* which will eventually call pthread_cond_signal(&op->cond) */
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switch (op->operation) {
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case REST_IT_OP_MSG_CREATE:
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cbc_message_new(&op->u.create.cbc_msg, op);
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break;
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case REST_IT_OP_MSG_DELETE:
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cbc_msg = cbc_message_by_id(op->u.del.msg_id);
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if (cbc_msg) {
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cbc_message_delete(cbc_msg, op);
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} else {
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rest_it_op_set_http_result(op, 404, "Unknown message ID");
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rest_it_op_complete(op);
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}
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break;
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/* TODO: REPLACE */
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/* TODO: STATUS */
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default:
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rest_it_op_set_http_result(op, 501, "Not Implemented");
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rest_it_op_complete(op);
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break;
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}
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}
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void rest_it_op_set_http_result(struct rest_it_op *op, uint32_t code, const char *body)
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{
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if (!op)
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return;
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op->http_result.response_code = code;
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op->http_result.message = body;
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}
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/* signal completion of rest_it_op to whoever is waiting for it */
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void rest_it_op_complete(struct rest_it_op *op)
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{
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LOGP(DREST, LOGL_DEBUG, "%s(op=%p) complete\n", __func__, op);
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if (!op)
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return;
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pthread_cond_signal(&op->cond);
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}
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