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, 248 insertions, 0 deletions

diff --git a/src/tools/operf/operf_client.c b/src/tools/operf/operf_client.c
new file mode 100644
index 00000000..1f6226d4
--- /dev/null
+++ b/src/tools/operf/operf_client.c
@@ -0,0 +1,248 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Ouroboros ping 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.
+ */
+
+#include <ouroboros/dev.h>
+#include <ouroboros/time_utils.h>
+
+#ifdef __FreeBSD__
+#define __XSI_VISIBLE 500
+#endif
+
+#include <signal.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <arpa/inet.h>
+#include <math.h>
+#include <errno.h>
+#include <float.h>
+
+void shutdown_client(int signo, siginfo_t * info, void * c)
+{
+        (void) info;
+        (void) c;
+
+        switch(signo) {
+        case SIGINT:
+        case SIGTERM:
+        case SIGHUP:
+                pthread_cancel(client.reader_pt);
+                pthread_cancel(client.writer_pt);
+        default:
+                return;
+        }
+}
+
+void * reader(void * o)
+{
+        struct timespec timeout = {2, 0};
+
+        char buf[OPERF_BUF_SIZE];
+        int fd = 0;
+        int msg_len = 0;
+
+        (void) o;
+
+        /* FIXME: use flow timeout option once we have it */
+        while (flow_event_wait(client.flows, client.fq, &timeout) != -ETIMEDOUT)
+                while ((fd = fqueue_next(client.fq)) >= 0) {
+                        msg_len = flow_read(fd, buf, OPERF_BUF_SIZE);
+                        if (msg_len != client.size) {
+                                printf("Invalid message on fd %d.\n", fd);
+                                continue;
+                        }
+
+                        ++client.rcvd;
+                }
+
+        return (void *) 0;
+}
+
+void * writer(void * o)
+{
+        int * fdp = (int *) o;
+        long gap = client.size * 8.0 * (BILLION / (double) client.rate);
+
+        struct timespec now;
+        struct timespec start;
+        struct timespec intv = {(gap / BILLION), gap % BILLION};
+
+        char * buf = malloc(client.size);
+        if (buf == NULL)
+                return (void *) -ENOMEM;
+
+        if (fdp == NULL)
+                return (void *) -EINVAL;
+
+        memset(buf, 0, client.size);
+
+        if (client.flood)
+                printf("Flooding %s with %d byte SDUs for %d seconds.\n\n",
+                       client.s_apn, client.size, client.duration / 1000);
+        else
+                printf("Sending %d byte SDUs for %d s to %s at %.3lf Mb/s.\n\n",
+                       client.size, client.duration / 1000, client.s_apn,
+                       client.rate / (double) MILLION);
+
+        clock_gettime(CLOCK_REALTIME, &start);
+        clock_gettime(CLOCK_REALTIME, &now);
+
+        pthread_cleanup_push((void (*) (void *)) free, buf);
+
+        if (client.flood) {
+                while (ts_diff_ms(&start, &now) < client.duration) {
+                        if (flow_write(*fdp, buf, client.size) == -1) {
+                                printf("Failed to send SDU.\n");
+                                flow_dealloc(*fdp);
+                                free(buf);
+                                return (void *) -1;
+                        }
+
+                        ++client.sent;
+
+                        clock_gettime(CLOCK_REALTIME, &now);
+                }
+        } else {
+                while (ts_diff_ms(&start, &now) < client.duration) {
+                        if (flow_write(*fdp, buf, client.size) == -1) {
+                                printf("Failed to send SDU.\n");
+                                flow_dealloc(*fdp);
+                                free(buf);
+                                return (void *) -1;
+                        }
+
+                        ++client.sent;
+
+                        nanosleep(&intv, NULL);
+
+                        clock_gettime(CLOCK_REALTIME, &now);
+                }
+        }
+
+        pthread_cleanup_pop(true);
+
+        printf("Test finished.\n");
+
+        return (void *) 0;
+}
+
+static int client_init(void)
+{
+        client.flows = flow_set_create();
+        if (client.flows == NULL)
+                return -ENOMEM;
+
+        client.fq = fqueue_create();
+        if (client.fq == NULL) {
+                flow_set_destroy(client.flows);
+                return -ENOMEM;
+        }
+
+        client.sent = 0;
+        client.rcvd = 0;
+
+        return 0;
+}
+
+void client_fini(void)
+{
+        if (client.flows != NULL)
+                flow_set_destroy(client.flows);
+
+        if (client.fq != NULL)
+                fqueue_destroy(client.fq);
+}
+
+int client_main(void)
+{
+        struct sigaction sig_act;
+
+        struct timespec tic;
+        struct timespec toc;
+
+        int fd;
+
+        memset(&sig_act, 0, sizeof sig_act);
+        sig_act.sa_sigaction = &shutdown_client;
+        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;
+        }
+
+        if (client_init()) {
+                printf("Failed to initialize client.\n");
+                return -1;
+        }
+
+        fd = flow_alloc(client.s_apn, NULL, NULL);
+        if (fd < 0) {
+                flow_set_destroy(client.flows);
+                fqueue_destroy(client.fq);
+                printf("Failed to allocate flow.\n");
+                return -1;
+        }
+
+        flow_set_add(client.flows, fd);
+
+        if (flow_alloc_res(fd)) {
+                printf("Flow allocation refused.\n");
+                flow_set_del(client.flows, fd);
+                flow_dealloc(fd);
+                client_fini();
+                return -1;
+        }
+
+        clock_gettime(CLOCK_REALTIME, &tic);
+
+        pthread_create(&client.reader_pt, NULL, reader, NULL);
+        pthread_create(&client.writer_pt, NULL, writer, &fd);
+
+        pthread_join(client.writer_pt, NULL);
+
+        clock_gettime(CLOCK_REALTIME, &toc);
+
+        pthread_join(client.reader_pt, NULL);
+
+        printf("\n");
+        printf("--- %s perf statistics ---\n", client.s_apn);
+        printf("%ld SDUs transmitted, ", client.sent);
+        printf("%ld received, ", client.rcvd);
+        printf("%ld%% packet loss, ", client.sent == 0 ? 0 :
+               100 - ((100 * client.rcvd) / client.sent));
+        printf("time: %.3f ms, ", ts_diff_us(&tic, &toc) / 1000.0);
+        printf("bandwidth: %.3lf Mb/s.\n",
+               (client.rcvd * client.size * 8)
+               / (double) ts_diff_us(&tic, &toc));
+
+        flow_set_del(client.flows, fd);
+
+        flow_dealloc(fd);
+
+        client_fini();
+
+        return 0;
+}