tools: Add operf tool

This tool allows bidirectional bandwidth measurement between a client
and server application. The server reflects all traffic back to the
client. The traffic can be capped at a certain rate or set to flood.

1 files changed, 179 insertions, 0 deletions

diff --git a/src/tools/operf/operf_server.c b/src/tools/operf/operf_server.c
new file mode 100644
index 00000000..4eb93879
--- /dev/null
+++ b/src/tools/operf/operf_server.c
@@ -0,0 +1,179 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Ouroboros perf application
+ *
+ *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *    Sander Vrijders   <sander.vrijders@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.
+ */
+
+#ifdef __FreeBSD__
+#define __XSI_VISIBLE 500
+#endif
+
+#include <stdlib.h>
+#include <signal.h>
+#include <arpa/inet.h>
+
+void shutdown_server(int signo, siginfo_t * info, void * c)
+{
+        (void) info;
+        (void) c;
+
+        switch(signo) {
+        case SIGINT:
+        case SIGTERM:
+        case SIGHUP:
+                pthread_cancel(server.accept_pt);
+        default:
+                return;
+        }
+}
+
+void * cleaner_thread(void * o)
+{
+        int i = 0;
+        struct timespec now = {0, 0};
+
+        (void) o;
+
+        while (true) {
+                clock_gettime(CLOCK_REALTIME, &now);
+                pthread_mutex_lock(&server.lock);
+                for (i = 0; i < OPERF_MAX_FLOWS; ++i)
+                        if (flow_set_has(server.flows, i) &&
+                            ts_diff_ms(&server.times[i], &now)
+                            > server.timeout) {
+                                printf("Flow %d timed out.\n", i);
+                                flow_set_del(server.flows, i);
+                                flow_dealloc(i);
+                        }
+
+                pthread_mutex_unlock(&server.lock);
+                sleep(1);
+        }
+}
+
+void * server_thread(void *o)
+{
+        int msg_len = 0;
+        struct timespec timeout = {0, 100 * MILLION};
+        struct timespec now = {0, 0};
+        int fd;
+
+        (void) o;
+
+        while (flow_event_wait(server.flows, server.fq, &timeout))
+                while ((fd = fqueue_next(server.fq)) >= 0) {
+                        msg_len = flow_read(fd, server.buffer, OPERF_BUF_SIZE);
+                        if (msg_len < 0)
+                                continue;
+
+                        clock_gettime(CLOCK_REALTIME, &now);
+
+                        pthread_mutex_lock(&server.lock);
+                        server.times[fd] = now;
+                        pthread_mutex_unlock(&server.lock);
+
+                        if (flow_write(fd, server.buffer, msg_len) < 0) {
+                                printf("Error writing to flow (fd %d).\n", fd);
+                                flow_dealloc(fd);
+                        }
+                }
+
+        return (void *) 0;
+}
+
+void * accept_thread(void * o)
+{
+        int fd = 0;
+        struct timespec now = {0, 0};
+        struct qos_spec qs;
+
+        (void) o;
+
+        printf("Ouroboros perf server started.\n");
+
+        while (true) {
+                fd = flow_accept(NULL, &qs);
+                if (fd < 0) {
+                        printf("Failed to accept flow.\n");
+                        break;
+                }
+
+                printf("New flow %d.\n", fd);
+
+                if (flow_alloc_resp(fd, 0)) {
+                        printf("Failed to give an allocate response.\n");
+                        flow_dealloc(fd);
+                        continue;
+                }
+
+                clock_gettime(CLOCK_REALTIME, &now);
+
+                pthread_mutex_lock(&server.lock);
+                flow_set_add(server.flows, fd);
+                server.times[fd] = now;
+                pthread_mutex_unlock(&server.lock);
+        }
+
+        return (void *) 0;
+}
+
+int server_main(void)
+{
+        struct sigaction sig_act;
+
+        memset(&sig_act, 0, sizeof sig_act);
+        sig_act.sa_sigaction = &shutdown_server;
+        sig_act.sa_flags = 0;
+
+        if (sigaction(SIGINT,  &sig_act, NULL) ||
+            sigaction(SIGTERM, &sig_act, NULL) ||
+            sigaction(SIGHUP,  &sig_act, NULL) ||
+            sigaction(SIGPIPE, &sig_act, NULL)) {
+                printf("Failed to install sighandler.\n");
+                return -1;
+        }
+
+        server.flows = flow_set_create();
+        if (server.flows == NULL)
+                return 0;
+
+        server.fq = fqueue_create();
+        if (server.fq == NULL) {
+                flow_set_destroy(server.flows);
+                return -1;
+        }
+
+        pthread_create(&server.cleaner_pt, NULL, cleaner_thread, NULL);
+        pthread_create(&server.accept_pt, NULL, accept_thread, NULL);
+        pthread_create(&server.server_pt, NULL, server_thread, NULL);
+
+        pthread_join(server.accept_pt, NULL);
+
+        pthread_cancel(server.server_pt);
+        pthread_cancel(server.cleaner_pt);
+
+        flow_set_destroy(server.flows);
+        fqueue_destroy(server.fq);
+
+        pthread_join(server.server_pt, NULL);
+        pthread_join(server.cleaner_pt, NULL);
+
+        return 0;
+}