/*
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
* have your name added to the list):
*
* - Philipp Tölke
- * - Christian Grothoff
*/
#include "platform.h"
#include <linux/if_tun.h>
*/
#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)
*/
};
#endif
+
/**
* Creates a tun-interface called dev;
+ *
* @param dev is asumed to point to a char[IFNAMSIZ]
- * if *dev == '\\0', uses the name supplied by the kernel
+ * if *dev == '\\0', uses the name supplied by the kernel;
* @return the fd to the tun or -1 on error
*/
static int
int fd;
if (NULL == dev)
- {
- errno = EINVAL;
- return -1;
- }
+ {
+ errno = EINVAL;
+ return -1;
+ }
if (-1 == (fd = open ("/dev/net/tun", O_RDWR)))
- {
- fprintf (stderr,
- "Error opening `%s': %s\n", "/dev/net/tun", strerror (errno));
- return -1;
- }
+ {
+ fprintf (stderr, "Error opening `%s': %s\n", "/dev/net/tun",
+ strerror (errno));
+ return -1;
+ }
if (fd >= FD_SETSIZE)
- {
- fprintf (stderr, "File descriptor to large: %d", fd);
- return -1;
- }
+ {
+ fprintf (stderr, "File descriptor to large: %d", fd);
+ (void) close (fd);
+ return -1;
+ }
memset (&ifr, 0, sizeof (ifr));
ifr.ifr_flags = IFF_TUN;
- if ('\0' == *dev)
+ if ('\0' != *dev)
strncpy (ifr.ifr_name, dev, IFNAMSIZ);
if (-1 == ioctl (fd, TUNSETIFF, (void *) &ifr))
- {
- fprintf (stderr,
- "Error with ioctl on `%s': %s\n",
- "/dev/net/tun", strerror (errno));
- close (fd);
- return -1;
- }
+ {
+ fprintf (stderr, "Error with ioctl on `%s': %s\n", "/dev/net/tun",
+ strerror (errno));
+ (void) close (fd);
+ return -1;
+ }
strcpy (dev, ifr.ifr_name);
return fd;
}
* @param prefix_len the length of the network-prefix
*/
static void
-set_address6 (const char *dev,
- const char *address,
- unsigned long prefix_len)
+set_address6 (const char *dev, const char *address, unsigned long prefix_len)
{
struct ifreq ifr;
struct in6_ifreq ifr6;
* parse the new address
*/
memset (&sa6, 0, sizeof (struct sockaddr_in6));
+ sa6.sin6_family = AF_INET6;
if (1 != inet_pton (AF_INET6, address, sa6.sin6_addr.s6_addr))
- {
- fprintf (stderr,
- "Failed to parse address `%s': %s\n",
- address, strerror (errno));
- exit (1);
- }
+ {
+ fprintf (stderr, "Failed to parse address `%s': %s\n", address,
+ strerror (errno));
+ exit (1);
+ }
if (-1 == (fd = socket (PF_INET6, SOCK_DGRAM, 0)))
- {
- fprintf (stderr,
- "Error creating socket: %s\n",
- strerror (errno));
- exit (1);
- }
-
- sa6.sin6_family = AF_INET6;
- memcpy (&ifr6.ifr6_addr,
- &sa6.sin6_addr,
- sizeof (struct in6_addr));
-
+ {
+ fprintf (stderr, "Error creating socket: %s\n", strerror (errno));
+ exit (1);
+ }
+ memset (&ifr, 0, sizeof (struct ifreq));
/*
* Get the index of the if
*/
strncpy (ifr.ifr_name, dev, IFNAMSIZ);
if (-1 == ioctl (fd, SIOGIFINDEX, &ifr))
- {
- fprintf (stderr,
- "ioctl failed at %d: %s\n",
- __LINE__,
- strerror (errno));
- exit (1);
- }
- ifr6.ifr6_ifindex = ifr.ifr_ifindex;
+ {
+ fprintf (stderr, "ioctl failed at %d: %s\n", __LINE__, strerror (errno));
+ (void) close (fd);
+ exit (1);
+ }
+ memset (&ifr6, 0, sizeof (struct in6_ifreq));
+ ifr6.ifr6_addr = sa6.sin6_addr;
+ ifr6.ifr6_ifindex = ifr.ifr_ifindex;
ifr6.ifr6_prefixlen = prefix_len;
/*
* Set the address
*/
if (-1 == ioctl (fd, SIOCSIFADDR, &ifr6))
- {
- fprintf (stderr,
- "ioctl failed at line %d: %s\n", __LINE__, strerror (errno));
- exit (1);
- }
+ {
+ fprintf (stderr, "ioctl failed at line %d: %s\n", __LINE__,
+ strerror (errno));
+ (void) close (fd);
+ exit (1);
+ }
/*
* Get the flags
*/
if (-1 == ioctl (fd, SIOCGIFFLAGS, &ifr))
- {
- fprintf (stderr,
- "ioctl failed at line %d: %s\n", __LINE__, strerror (errno));
- exit (1);
- }
+ {
+ fprintf (stderr, "ioctl failed at line %d: %s\n", __LINE__,
+ strerror (errno));
+ (void) close (fd);
+ exit (1);
+ }
/*
* Add the UP and RUNNING flags
*/
ifr.ifr_flags |= IFF_UP | IFF_RUNNING;
if (-1 == ioctl (fd, SIOCSIFFLAGS, &ifr))
- {
- fprintf (stderr,
- "ioctl failed at line %d: %s\n", __LINE__, strerror (errno));
- exit (1);
- }
+ {
+ fprintf (stderr, "ioctl failed at line %d: %s\n", __LINE__,
+ strerror (errno));
+ (void) close (fd);
+ exit (1);
+ }
if (0 != close (fd))
- {
- fprintf (stderr, "close failed: %s\n", strerror (errno));
- exit (1);
- }
+ {
+ fprintf (stderr, "close failed: %s\n", strerror (errno));
+ exit (1);
+ }
}
* @param mask the netmask
*/
static void
-set_address4 (const char *dev,
- const char *address,
- const char *mask)
+set_address4 (const char *dev, const char *address, const char *mask)
{
int fd;
struct sockaddr_in *addr;
memset (&ifr, 0, sizeof (struct ifreq));
addr = (struct sockaddr_in *) &(ifr.ifr_addr);
- memset (addr, 0, sizeof (struct sockaddr_in));
addr->sin_family = AF_INET;
- addr->sin_addr.s_addr = inet_addr (address);
/*
* Parse the address
*/
if (1 != inet_pton (AF_INET, address, &addr->sin_addr.s_addr))
- {
- fprintf (stderr,
- "Failed to parse address `%s': %s\n",
- address, strerror (errno));
- exit (1);
- }
+ {
+ fprintf (stderr, "Failed to parse address `%s': %s\n", address,
+ strerror (errno));
+ exit (1);
+ }
-
if (-1 == (fd = socket (PF_INET, SOCK_DGRAM, 0)))
- {
- fprintf (stderr,
- "Error creating socket: %s\n",
- strerror (errno));
- exit (1);
- }
+ {
+ fprintf (stderr, "Error creating socket: %s\n", strerror (errno));
+ exit (1);
+ }
strncpy (ifr.ifr_name, dev, IFNAMSIZ);
* Set the address
*/
if (-1 == ioctl (fd, SIOCSIFADDR, &ifr))
- {
- fprintf (stderr,
- "ioctl failed at %d: %s\n",
- __LINE__,
- strerror (errno));
- exit (1);
- }
+ {
+ fprintf (stderr, "ioctl failed at %d: %s\n", __LINE__, strerror (errno));
+ (void) close (fd);
+ exit (1);
+ }
/*
* Parse the netmask
*/
addr = (struct sockaddr_in *) &(ifr.ifr_netmask);
if (1 != inet_pton (AF_INET, mask, &addr->sin_addr.s_addr))
- {
- fprintf (stderr,
- "Failed to parse address `%s': %s\n",
- mask,
- strerror (errno));
- exit (1);
- }
+ {
+ fprintf (stderr, "Failed to parse address `%s': %s\n", mask,
+ strerror (errno));
+ (void) close (fd);
+ exit (1);
+ }
/*
* Set the netmask
*/
if (-1 == ioctl (fd, SIOCSIFNETMASK, &ifr))
- {
- fprintf (stderr,
- "ioctl failed at line %d: %s\n", __LINE__, strerror (errno));
- exit (1);
- }
+ {
+ fprintf (stderr, "ioctl failed at line %d: %s\n", __LINE__,
+ strerror (errno));
+ (void) close (fd);
+ exit (1);
+ }
/*
* Get the flags
*/
if (-1 == ioctl (fd, SIOCGIFFLAGS, &ifr))
- {
- fprintf (stderr,
- "ioctl failed at line %d: %s\n", __LINE__, strerror (errno));
- exit (1);
- }
+ {
+ fprintf (stderr, "ioctl failed at line %d: %s\n", __LINE__,
+ strerror (errno));
+ (void) close (fd);
+ exit (1);
+ }
/*
* Add the UP and RUNNING flags
*/
ifr.ifr_flags |= IFF_UP | IFF_RUNNING;
if (-1 == ioctl (fd, SIOCSIFFLAGS, &ifr))
- {
- fprintf (stderr,
- "ioctl failed at line %d: %s\n", __LINE__, strerror (errno));
- exit (1);
- }
+ {
+ fprintf (stderr, "ioctl failed at line %d: %s\n", __LINE__,
+ strerror (errno));
+ (void) close (fd);
+ exit (1);
+ }
if (0 != close (fd))
- {
- fprintf (stderr, "close failed: %s\n", strerror (errno));
- exit (1);
- }
+ {
+ fprintf (stderr, "close failed: %s\n", strerror (errno));
+ (void) close (fd);
+ exit (1);
+ }
}
+/**
+ * Start forwarding to and from the tunnel.
+ *
+ * @param fd_tun tunnel FD
+ */
static void
run (int fd_tun)
{
*/
unsigned char buftun[MAX_SIZE];
ssize_t buftun_size = 0;
- unsigned char *buftun_read;
+ unsigned char *buftun_read = NULL;
/*
* The buffer filled by reading from stdin
/* read refers to reading from fd_tun, writing to stdout */
int read_open = 1;
+
/* write refers to reading from stdin, writing to fd_tun */
int write_open = 1;
while ((1 == read_open) || (1 == write_open))
+ {
+ FD_ZERO (&fds_w);
+ FD_ZERO (&fds_r);
+
+ /*
+ * We are supposed to read and the buffer is empty
+ * -> select on read from tun
+ */
+ if (read_open && (0 == buftun_size))
+ FD_SET (fd_tun, &fds_r);
+
+ /*
+ * We are supposed to read and the buffer is not empty
+ * -> select on write to stdout
+ */
+ if (read_open && (0 != buftun_size))
+ FD_SET (1, &fds_w);
+
+ /*
+ * We are supposed to write and the buffer is empty
+ * -> select on read from stdin
+ */
+ if (write_open && (NULL == bufin_read))
+ FD_SET (0, &fds_r);
+
+ /*
+ * We are supposed to write and the buffer is not empty
+ * -> select on write to tun
+ */
+ if (write_open && (NULL != bufin_read))
+ FD_SET (fd_tun, &fds_w);
+
+ int r = select (fd_tun + 1, &fds_r, &fds_w, NULL, NULL);
+
+ if (-1 == r)
{
- FD_ZERO (&fds_w);
- FD_ZERO (&fds_r);
-
- /*
- * We are supposed to read and the buffer is empty
- * -> select on read from tun
- */
- if (read_open && (0 == buftun_size))
- FD_SET (fd_tun, &fds_r);
-
- /*
- * We are supposed to read and the buffer is not empty
- * -> select on write to stdout
- */
- if (read_open && (0 != buftun_size))
- FD_SET (1, &fds_w);
-
- /*
- * We are supposed to write and the buffer is empty
- * -> select on read from stdin
- */
- if (write_open && (NULL == bufin_read))
- FD_SET (0, &fds_r);
-
- /*
- * We are supposed to write and the buffer is not empty
- * -> select on write to tun
- */
- if (write_open && (NULL != bufin_read))
- FD_SET (fd_tun, &fds_w);
-
- int r = select (fd_tun + 1, &fds_r, &fds_w, NULL, NULL);
- if (-1 == r)
- {
- if (EINTR == errno)
- continue;
- fprintf (stderr, "select failed: %s\n", strerror (errno));
- exit (1);
- }
-
- if (r > 0)
- {
- if (FD_ISSET (fd_tun, &fds_r))
- {
- buftun_size =
- read (fd_tun, buftun + sizeof (struct GNUNET_MessageHeader),
- MAX_SIZE - sizeof (struct GNUNET_MessageHeader));
- if (-1 == buftun_size)
- {
- fprintf (stderr, "read-error: %s\n", strerror (errno));
- shutdown (fd_tun, SHUT_RD);
- shutdown (1, SHUT_WR);
- read_open = 0;
- buftun_size = 0;
- }
- else if (0 == buftun_size)
- {
- fprintf (stderr, "EOF on tun\n");
- shutdown (fd_tun, SHUT_RD);
- shutdown (1, SHUT_WR);
- read_open = 0;
- buftun_size = 0;
- }
- else
- {
- buftun_read = buftun;
- struct GNUNET_MessageHeader *hdr =
- (struct GNUNET_MessageHeader *) buftun;
- buftun_size += sizeof (struct GNUNET_MessageHeader);
- hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_HELPER);
- hdr->size = htons (buftun_size);
- }
- }
- else if (FD_ISSET (1, &fds_w))
- {
- ssize_t written = write (1, buftun_read, buftun_size);
- if (-1 == written)
- {
- fprintf (stderr,
- "write-error to stdout: %s\n",
- strerror (errno));
- shutdown (fd_tun, SHUT_RD);
- shutdown (1, SHUT_WR);
- read_open = 0;
- buftun_size = 0;
- }
- else if (0 == written)
- {
- fprintf (stderr,
- "write returned 0!?\n");
- exit (1);
- }
- else
- {
- buftun_size -= written;
- buftun_read += written;
- }
- }
-
- if (FD_ISSET (0, &fds_r))
- {
- bufin_size = read (0, bufin + bufin_rpos, MAX_SIZE - bufin_rpos);
- if (-1 == bufin_size)
- {
- fprintf (stderr,
- "read-error: %s\n",
- strerror (errno));
- shutdown (0, SHUT_RD);
- shutdown (fd_tun, SHUT_WR);
- write_open = 0;
- bufin_size = 0;
- }
- else if (0 == bufin_size)
- {
- fprintf (stderr,
- "EOF on stdin\n");
- shutdown (0, SHUT_RD);
- shutdown (fd_tun, SHUT_WR);
- write_open = 0;
- bufin_size = 0;
- }
- else
- {
- struct GNUNET_MessageHeader *hdr;
-
- PROCESS_BUFFER:
- bufin_rpos += bufin_size;
- if (bufin_rpos < sizeof (struct GNUNET_MessageHeader))
- continue;
- hdr = (struct GNUNET_MessageHeader *) bufin;
- if (ntohs (hdr->type) != GNUNET_MESSAGE_TYPE_VPN_HELPER)
- {
- fprintf (stderr, "protocol violation!\n");
- exit (1);
- }
- if (ntohs (hdr->size) > bufin_rpos)
- continue;
- bufin_read = bufin + sizeof (struct GNUNET_MessageHeader);
- bufin_size = ntohs (hdr->size) - sizeof (struct GNUNET_MessageHeader);
- bufin_rpos -= bufin_size + sizeof (struct GNUNET_MessageHeader);
- }
- }
- else if (FD_ISSET (fd_tun, &fds_w))
- {
- ssize_t written = write (fd_tun, bufin_read, bufin_size);
- if (-1 == written)
- {
- fprintf (stderr, "write-error to tun: %s\n",
- strerror (errno));
- shutdown (0, SHUT_RD);
- shutdown (fd_tun, SHUT_WR);
- write_open = 0;
- bufin_size = 0;
- }
- else if (0 == written)
- {
- fprintf (stderr,
- "write returned 0!?\n");
- exit (1);
- }
- else
- {
- bufin_size -= written;
- bufin_read += written;
- if (0 == bufin_size)
- {
- memmove (bufin,
- bufin_read,
- bufin_rpos);
- bufin_read = NULL; /* start reading again */
- bufin_size = 0;
- goto PROCESS_BUFFER;
- }
- }
- }
- }
+ if (EINTR == errno)
+ continue;
+ fprintf (stderr, "select failed: %s\n", strerror (errno));
+ exit (1);
+ }
+
+ if (r > 0)
+ {
+ if (FD_ISSET (fd_tun, &fds_r))
+ {
+ buftun_size =
+ read (fd_tun, buftun + sizeof (struct GNUNET_MessageHeader),
+ MAX_SIZE - sizeof (struct GNUNET_MessageHeader));
+ if (-1 == buftun_size)
+ {
+ fprintf (stderr, "read-error: %s\n", strerror (errno));
+ shutdown (fd_tun, SHUT_RD);
+ shutdown (1, SHUT_WR);
+ read_open = 0;
+ buftun_size = 0;
+ }
+ else if (0 == buftun_size)
+ {
+ fprintf (stderr, "EOF on tun\n");
+ shutdown (fd_tun, SHUT_RD);
+ shutdown (1, SHUT_WR);
+ read_open = 0;
+ buftun_size = 0;
+ }
+ else
+ {
+ buftun_read = buftun;
+ struct GNUNET_MessageHeader *hdr =
+ (struct GNUNET_MessageHeader *) buftun;
+ buftun_size += sizeof (struct GNUNET_MessageHeader);
+ hdr->type = htons (GNUNET_MESSAGE_TYPE_VPN_HELPER);
+ hdr->size = htons (buftun_size);
+ }
+ }
+ else if (FD_ISSET (1, &fds_w))
+ {
+ ssize_t written = write (1, buftun_read, buftun_size);
+
+ if (-1 == written)
+ {
+#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;
+ buftun_size = 0;
+ }
+ else if (0 == written)
+ {
+ fprintf (stderr, "write returned 0!?\n");
+ exit (1);
+ }
+ else
+ {
+ buftun_size -= written;
+ buftun_read += written;
+ }
+ }
+
+ if (FD_ISSET (0, &fds_r))
+ {
+ bufin_size = read (0, bufin + bufin_rpos, MAX_SIZE - bufin_rpos);
+ if (-1 == bufin_size)
+ {
+ fprintf (stderr, "read-error: %s\n", strerror (errno));
+ shutdown (0, SHUT_RD);
+ shutdown (fd_tun, SHUT_WR);
+ write_open = 0;
+ bufin_size = 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;
+ bufin_size = 0;
+ }
+ else
+ {
+ struct GNUNET_MessageHeader *hdr;
+
+PROCESS_BUFFER:
+ bufin_rpos += bufin_size;
+ if (bufin_rpos < sizeof (struct GNUNET_MessageHeader))
+ continue;
+ hdr = (struct GNUNET_MessageHeader *) bufin;
+ if (ntohs (hdr->type) != GNUNET_MESSAGE_TYPE_VPN_HELPER)
+ {
+ fprintf (stderr, "protocol violation!\n");
+ exit (1);
+ }
+ if (ntohs (hdr->size) > bufin_rpos)
+ continue;
+ bufin_read = bufin + sizeof (struct GNUNET_MessageHeader);
+ bufin_size = ntohs (hdr->size) - sizeof (struct GNUNET_MessageHeader);
+ bufin_rpos -= bufin_size + sizeof (struct GNUNET_MessageHeader);
+ }
+ }
+ else if (FD_ISSET (fd_tun, &fds_w))
+ {
+ ssize_t written = write (fd_tun, bufin_read, bufin_size);
+
+ if (-1 == written)
+ {
+ fprintf (stderr, "write-error to tun: %s\n", strerror (errno));
+ shutdown (0, SHUT_RD);
+ shutdown (fd_tun, SHUT_WR);
+ write_open = 0;
+ bufin_size = 0;
+ }
+ else if (0 == written)
+ {
+ fprintf (stderr, "write returned 0!?\n");
+ exit (1);
+ }
+ else
+ {
+ bufin_size -= written;
+ bufin_read += written;
+ if (0 == bufin_size)
+ {
+ memmove (bufin, bufin_read, bufin_rpos);
+ bufin_read = NULL; /* start reading again */
+ bufin_size = 0;
+ goto PROCESS_BUFFER;
+ }
+ }
+ }
}
+ }
}
+/**
+ * Open VPN tunnel interface.
+ *
+ * @param argc must be 6
+ * @param argv 0: binary name (gnunet-helper-vpn)
+ * 1: tunnel interface name (gnunet-vpn)
+ * 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)
{
char dev[IFNAMSIZ];
int fd_tun;
+ int global_ret;
+
+ if (6 != argc)
+ {
+ fprintf (stderr, "Fatal: must supply 5 arguments!\n");
+ return 1;
+ }
+
+ strncpy (dev, argv[1], IFNAMSIZ);
+ dev[IFNAMSIZ - 1] = '\0';
- memset (dev, 0, IFNAMSIZ);
if (-1 == (fd_tun = init_tun (dev)))
- {
- fprintf (stderr,
- "Fatal: could not initialize tun-interface\n");
- return 1;
- }
+ {
+ 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 (5 != argc)
+ if (0 != strcmp (argv[2], "-"))
+ {
+ const char *address = argv[2];
+ long prefix_len = atol (argv[3]);
+
+ if ((prefix_len < 1) || (prefix_len > 127))
{
- fprintf (stderr,
- "Fatal: must supply 4 arguments!\n");
+ fprintf (stderr, "Fatal: prefix_len out of range\n");
return 1;
}
- {
- const char *address = argv[1];
- long prefix_len = atol(argv[2]);
-
- if ( (prefix_len < 1) || (prefix_len > 127) )
- {
- fprintf(stderr, "Fatal: prefix_len out of range\n");
- return 1;
- }
-
set_address6 (dev, address, prefix_len);
}
-
+
+ if (0 != strcmp (argv[4], "-"))
{
- const char *address = argv[3];
- const char *mask = argv[4];
+ const char *address = argv[4];
+ const char *mask = argv[5];
set_address4 (dev, address, mask);
}
-
+
uid_t uid = getuid ();
+#ifdef HAVE_SETRESUID
if (0 != setresuid (uid, uid, uid))
- fprintf (stderr,
- "Failed to setresuid: %s\n",
- strerror (errno));
+ {
+ fprintf (stderr, "Failed to setresuid: %s\n", strerror (errno));
+ global_ret = 2;
+ goto cleanup;
+ }
+#else
+ if (0 != (setuid (uid) | seteuid (uid)))
+ {
+ fprintf (stderr, "Failed to setuid: %s\n", strerror (errno));
+ global_ret = 2;
+ goto cleanup;
+ }
+#endif
+
if (SIG_ERR == signal (SIGPIPE, SIG_IGN))
- fprintf (stderr,
- "Failed to protect against SIGPIPE: %s\n",
- strerror (errno));
+ {
+ fprintf (stderr, "Failed to protect against SIGPIPE: %s\n",
+ strerror (errno));
+ /* no exit, we might as well die with SIGPIPE should it ever happen */
+ }
run (fd_tun);
+ global_ret = 0;
+ cleanup:
close (fd_tun);
- return 0;
+ return global_ret;
}
projects / oweals / gnunet.git / blobdiff