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authorSander Vrijders <sander.vrijders@intec.ugent.be>2016-08-25 16:23:03 +0200
committerSander Vrijders <sander.vrijders@intec.ugent.be>2016-08-25 16:23:03 +0200
commit84f0f1a64fa2beb00abf30d00072d4f818cf9bd4 (patch)
tree32443ecbb20927b33a6becd50dc6720e4be5b722 /src/ipcpd/normal/cdap_request.c
parent830f60599a7912c89b4754e7c757f2ef9e6c00f0 (diff)
parentf7777922edd673e43fd670d3d28f052fde2ecc0a (diff)
downloadouroboros-84f0f1a64fa2beb00abf30d00072d4f818cf9bd4.tar.gz
ouroboros-84f0f1a64fa2beb00abf30d00072d4f818cf9bd4.zip
Merged in dstaesse/ouroboros/be-bugfixing (pull request #226)
ipcpd, normal: Safe handling of CDAP requests
Diffstat (limited to 'src/ipcpd/normal/cdap_request.c')
-rw-r--r--src/ipcpd/normal/cdap_request.c156
1 files changed, 156 insertions, 0 deletions
diff --git a/src/ipcpd/normal/cdap_request.c b/src/ipcpd/normal/cdap_request.c
new file mode 100644
index 00000000..cdbbb833
--- /dev/null
+++ b/src/ipcpd/normal/cdap_request.c
@@ -0,0 +1,156 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Normal IPCP - RIB Manager - CDAP request
+ *
+ * Sander Vrijders <sander.vrijders@intec.ugent.be>
+ * Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <ouroboros/config.h>
+#include <ouroboros/time_utils.h>
+#include <ouroboros/errno.h>
+
+#include "cdap_request.h"
+
+#include <stdlib.h>
+
+struct cdap_request * cdap_request_create(enum cdap_opcode code,
+ char * name,
+ int invoke_id,
+ struct cdap * instance)
+{
+ struct cdap_request * creq = malloc(sizeof(*creq));
+ pthread_condattr_t cattr;
+
+ if (creq == NULL)
+ return NULL;
+
+ creq->code = code;
+ creq->name = name;
+ creq->invoke_id = invoke_id;
+ creq->instance = instance;
+ creq->state = REQ_INIT;
+ creq->result = -1;
+
+ pthread_condattr_init(&cattr);
+ pthread_condattr_setclock(&cattr, PTHREAD_COND_CLOCK);
+ pthread_cond_init(&creq->cond, &cattr);
+ pthread_mutex_init(&creq->lock, NULL);
+
+ INIT_LIST_HEAD(&creq->next);
+
+ return creq;
+}
+
+void cdap_request_destroy(struct cdap_request * creq)
+{
+ if (creq == NULL)
+ return;
+
+ pthread_mutex_lock(&creq->lock);
+
+ if (creq->state == REQ_DESTROY) {
+ pthread_mutex_unlock(&creq->lock);
+ return;
+ }
+
+ if (creq->state == REQ_INIT)
+ creq->state = REQ_DONE;
+
+ if (creq->state == REQ_PENDING) {
+ creq->state = REQ_DESTROY;
+ pthread_cond_broadcast(&creq->cond);
+ }
+
+ while (creq->state != REQ_DONE)
+ pthread_cond_wait(&creq->cond, &creq->lock);
+
+ pthread_mutex_unlock(&creq->lock);
+
+ pthread_cond_destroy(&creq->cond);
+ pthread_mutex_destroy(&creq->lock);
+
+ if (creq->name != NULL)
+ free(creq->name);
+
+ free(creq);
+}
+
+int cdap_request_wait(struct cdap_request * creq)
+{
+ struct timespec timeout = {(CDAP_REPLY_TIMEOUT / 1000),
+ (CDAP_REPLY_TIMEOUT % 1000) * MILLION};
+ struct timespec abstime;
+ int ret = -1;
+
+ if (creq == NULL)
+ return -EINVAL;
+
+ clock_gettime(CLOCK_REALTIME, &abstime);
+ ts_add(&abstime, &timeout, &abstime);
+
+ pthread_mutex_lock(&creq->lock);
+
+ if (creq->state != REQ_INIT) {
+ pthread_mutex_unlock(&creq->lock);
+ return -EINVAL;
+ }
+
+ creq->state = REQ_PENDING;
+
+ while (creq->state == REQ_PENDING) {
+ if ((ret = -pthread_cond_timedwait(&creq->cond,
+ &creq->lock,
+ &abstime)) == -ETIMEDOUT) {
+ break;
+ }
+ }
+
+ if (creq->state == REQ_DESTROY)
+ ret = -1;
+
+ creq->state = REQ_DONE;
+ pthread_cond_broadcast(&creq->cond);
+
+ pthread_mutex_unlock(&creq->lock);
+
+ return ret;
+}
+
+void cdap_request_respond(struct cdap_request * creq,
+ int response)
+{
+ if (creq == NULL)
+ return;
+
+ pthread_mutex_lock(&creq->lock);
+
+ if (creq->state != REQ_PENDING) {
+ pthread_mutex_unlock(&creq->lock);
+ return;
+ }
+
+ creq->state = REQ_RESPONSE;
+ creq->result = response;
+ pthread_cond_broadcast(&creq->cond);
+
+ while (creq->state == REQ_RESPONSE)
+ pthread_cond_wait(&creq->cond, &creq->lock);
+
+ pthread_mutex_unlock(&creq->lock);
+}