/*
This file is part of GNUnet.
- (C) 2010 Christian Grothoff
+ (C) 2010, 2012 Christian Grothoff
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
*/
/**
- * @file vpn/gnunet-daemon-vpn.c
- * @brief the helper for various vpn-daemons. Opens a virtual network-interface,
+ * @file vpn/gnunet-helper-vpn.c
+ * @brief the helper for the VPN service. Opens a virtual network-interface,
* sends data received on the if to stdout, sends data received on stdin to the
* interface
* @author Philipp Tölke
+ * @author Christian Grothoff
*
* The following list of people have reviewed this code and considered
* it safe since the last modification (if you reviewed it, please
*/
#include "gnunet_protocols.h"
+/**
+ * Should we print (interesting|debug) messages that can happen during
+ * normal operation?
+ */
+#define DEBUG GNUNET_NO
+
/**
* Maximum size of a GNUnet message (GNUNET_SERVER_MAX_MESSAGE_SIZE)
*/
if (fd >= FD_SETSIZE)
{
fprintf (stderr, "File descriptor to large: %d", fd);
+ (void) close (fd);
return -1;
}
if (-1 == written)
{
- fprintf (stderr, "write-error to stdout: %s\n", strerror (errno));
+#if !DEBUG
+ if (errno != EPIPE)
+#endif
+ fprintf (stderr, "write-error to stdout: %s\n", strerror (errno));
shutdown (fd_tun, SHUT_RD);
shutdown (1, SHUT_WR);
read_open = 0;
}
else if (0 == bufin_size)
{
+#if DEBUG
fprintf (stderr, "EOF on stdin\n");
+#endif
shutdown (0, SHUT_RD);
shutdown (fd_tun, SHUT_WR);
write_open = 0;
* @param argc must be 6
* @param argv 0: binary name (gnunet-helper-vpn)
* 1: tunnel interface name (gnunet-vpn)
- * 2: IPv6 address (::1)
- * 3: IPv6 netmask length in bits (64)
- * 4: IPv4 address (1.2.3.4)
- * 5: IPv4 netmask (255.255.0.0)
+ * 2: IPv6 address (::1), "-" to disable
+ * 3: IPv6 netmask length in bits (64), ignored if #2 is "-"
+ * 4: IPv4 address (1.2.3.4), "-" to disable
+ * 5: IPv4 netmask (255.255.0.0), ignored if #4 is "-"
*/
int
main (int argc, char **argv)
if (-1 == (fd_tun = init_tun (dev)))
{
- fprintf (stderr, "Fatal: could not initialize tun-interface\n");
+ fprintf (stderr, "Fatal: could not initialize tun-interface `%s' with IPv6 %s/%s and IPv4 %s/%s\n",
+ dev,
+ argv[2],
+ argv[3],
+ argv[4],
+ argv[5]);
return 1;
}
+ if (0 != strcmp (argv[2], "-"))
{
const char *address = argv[2];
long prefix_len = atol (argv[3]);
set_address6 (dev, address, prefix_len);
}
+ if (0 != strcmp (argv[4], "-"))
{
const char *address = argv[4];
const char *mask = argv[5];