summaryrefslogtreecommitdiff
path: root/src/tools/cbr/cbr_client.c
diff options
context:
space:
mode:
authordimitri staessens <dimitri.staessens@intec.ugent.be>2016-05-24 20:38:01 +0200
committerdimitri staessens <dimitri.staessens@intec.ugent.be>2016-05-24 20:45:30 +0200
commitd74d67a0e2d3de0ec208ed9b839815a70d84f727 (patch)
tree4abe39734cd5eda97ef3453ed234133c7f16d2ae /src/tools/cbr/cbr_client.c
parent82622409f7b32b697581837a9392a83342a45ad6 (diff)
downloadouroboros-d74d67a0e2d3de0ec208ed9b839815a70d84f727.tar.gz
ouroboros-d74d67a0e2d3de0ec208ed9b839815a70d84f727.zip
tools, lib: cbr tool for bandwidth testing
The tool sends constant bandwidth traffic between a client and a server. cbr --help for more info. Adds time_utils.h to the library containing useful functions for arithmetic with timespec and timeval structures.
Diffstat (limited to 'src/tools/cbr/cbr_client.c')
-rw-r--r--src/tools/cbr/cbr_client.c97
1 files changed, 97 insertions, 0 deletions
diff --git a/src/tools/cbr/cbr_client.c b/src/tools/cbr/cbr_client.c
new file mode 100644
index 00000000..7b8e8b3f
--- /dev/null
+++ b/src/tools/cbr/cbr_client.c
@@ -0,0 +1,97 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * A simple CBR generator
+ *
+ * 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>
+
+int client_main(int duration, int size, long rate)
+{
+ int fd = 0;
+ int result = 0;
+ bool stop = false;
+ char buf[size];
+ long seqnr = 0;
+ long long gap = size * 8 * (BILLION / rate); /* ns */
+
+ struct timespec start;
+ struct timespec end;
+ struct timespec interval = {(gap / BILLION), gap % BILLION};
+ int ms;
+
+ if (ap_init(CLIENT_AP_NAME)) {
+ printf("Failed to init AP.\n");
+ return -1;
+ }
+
+ printf("Client started, duration %d, rate %lu b/s, size %d B.\n",
+ duration, rate, size);
+
+ fd = flow_alloc(SERVER_AP_NAME, NULL, NULL);
+ if (fd < 0) {
+ printf("Failed to allocate flow.\n");
+ ap_fini();
+ return -1;
+ }
+
+ result = flow_alloc_res(fd);
+ if (result < 0) {
+ printf("Flow allocation refused.\n");
+ flow_dealloc(fd);
+ ap_fini();
+ return -1;
+ }
+
+ clock_gettime(CLOCK_REALTIME, &start);
+ while (!stop) {
+ memcpy(buf, &seqnr, sizeof(seqnr));
+
+ if (flow_write(fd, buf, size) == -1) {
+ printf("Failed to write SDU.\n");
+ stop = true;
+ }
+
+ nanosleep(&interval, NULL);
+
+ seqnr++;
+
+ clock_gettime(CLOCK_REALTIME, &end);
+
+ if (duration != 0
+ && ts_diff_us(&start, &end) / MILLION >= (long) duration)
+ stop = 1;
+ }
+
+ clock_gettime(CLOCK_REALTIME, &end);
+
+ ms = ts_diff_ms(&start, &end);
+
+ printf("sent statistics: "
+ "%9ld SDUs, %12ld bytes in %9d ms, %4.4f Mb/s\n",
+ seqnr, seqnr * size, ms, (seqnr * size * 8.0)/(ms * 1000));
+
+ flow_dealloc(fd);
+
+ ap_fini();
+
+ return 0;
+}