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authorChristian Grothoff <christian@grothoff.org>2012-11-16 15:37:03 +0000
committerChristian Grothoff <christian@grothoff.org>2012-11-16 15:37:03 +0000
commitbfa39dc4777fef5d3c0ebf9fe54472daf4b8fd5a (patch)
treeafd19e9a99c1f7dfa258ac2e917956d5f4608edb /src/transport/gnunet-transport-wlan-receiver.c
parent5f5b69feb3ca531788f2c3b102fbe17a02d5be38 (diff)
-receiver hack
Diffstat (limited to 'src/transport/gnunet-transport-wlan-receiver.c')
-rw-r--r--src/transport/gnunet-transport-wlan-receiver.c113
1 files changed, 113 insertions, 0 deletions
diff --git a/src/transport/gnunet-transport-wlan-receiver.c b/src/transport/gnunet-transport-wlan-receiver.c
new file mode 100644
index 000000000..22ad2e20d
--- /dev/null
+++ b/src/transport/gnunet-transport-wlan-receiver.c
@@ -0,0 +1,113 @@
+/*
+ This file is part of GNUnet
+ (C) 2012 Christian Grothoff (and other contributing authors)
+
+ GNUnet 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 3, or (at your
+ option) any later version.
+
+ GNUnet 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 GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * @file transport/gnunet-transport-wlan-receiver.c
+ * @brief program to send via WLAN as much as possible (to test physical/theoretical throughput)
+ * @author David Brodski
+ */
+#include "platform.h"
+#include "gnunet_protocols.h"
+#include "plugin_transport_wlan.h"
+
+int
+main (int argc, char *argv[])
+{
+ char msg_buf[65536];
+ unsigned long long count;
+ double bytes_per_s;
+ time_t start;
+ time_t akt;
+ ssize_t ret;
+ pid_t pid;
+ int commpipe[2]; /* This holds the fd for the input & output of the pipe */
+
+ if (2 != argc)
+ {
+ fprintf (stderr,
+ "This program must be started with the interface name as argument.\n");
+ fprintf (stderr,
+ "Usage: %s interface-name\n"
+ "e.g. %s mon0\n",
+ argv[0], argv[0]);
+ return 1;
+ }
+
+ /* Setup communication pipeline first */
+ if (pipe (commpipe))
+ {
+ fprintf (stderr,
+ "Failed to create pipe: %s\n",
+ STRERROR (errno));
+ exit (1);
+ }
+
+ /* Attempt to fork and check for errors */
+ if ((pid = fork ()) == -1)
+ {
+ fprintf (stderr, "Failed to fork: %s\n",
+ STRERROR (errno));
+ exit (1);
+ }
+
+ if (pid)
+ {
+ /* A positive (non-negative) PID indicates the parent process */
+ if (0 != close (commpipe[1])) /* Close unused side of pipe (in side) */
+ fprintf (stderr,
+ "Failed to close fd: %s\n",
+ strerror (errno));
+ start = time (NULL);
+ count = 0;
+ while (1)
+ {
+ ret = read (commpipe[1], msg_buf, sizeof (msg_buf));
+ if (0 > ret)
+ break;
+ count += ret;
+ akt = time (NULL);
+ if (akt - start > 30)
+ {
+ bytes_per_s = count / (akt - start);
+ bytes_per_s /= 1024;
+ printf ("recv %f kb/s\n", bytes_per_s);
+ start = akt;
+ count = 0;
+ }
+ }
+ }
+ else
+ {
+ /* A zero PID indicates that this is the child process */
+ (void) close (1);
+ if (-1 == dup2 (commpipe[1], 1)) /* Replace stdin with the in side of the pipe */
+ fprintf (stderr, "dup2 failed: %s\n", strerror (errno));
+ (void) close (commpipe[0]); /* Close unused side of pipe (in side) */
+ /* Replace the child fork with a new process */
+ if (execl
+ ("gnunet-helper-transport-wlan", "gnunet-helper-transport-wlan",
+ argv[1], NULL) == -1)
+ {
+ fprintf (stderr, "Could not start gnunet-helper-transport-wlan!");
+ _exit (1);
+ }
+ }
+ return 0;
+}