/*
This file is part of GNUnet.
- Copyright (C) 2009-2013 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2009-2013 GNUnet e.V.
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
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.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
*/
/**
#include "gnunet_util_lib.h"
#include "disk.h"
-#define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
-#define LOG_STRERROR_FILE(kind,syscall,filename) GNUNET_log_from_strerror_file (kind, "util", syscall, filename)
-#define LOG_STRERROR(kind,syscall) GNUNET_log_from_strerror (kind, "util", syscall)
+#define LOG(kind,...) GNUNET_log_from (kind, "util-network", __VA_ARGS__)
+#define LOG_STRERROR_FILE(kind,syscall,filename) GNUNET_log_from_strerror_file (kind, "util-network", syscall, filename)
+#define LOG_STRERROR(kind,syscall) GNUNET_log_from_strerror (kind, "util-network", syscall)
#define DEBUG_NETWORK GNUNET_EXTRA_LOGGING
}
+#ifndef WINDOWS
+/**
+ * If services crash, they can leave a unix domain socket file on the
+ * disk. This needs to be manually removed, because otherwise both
+ * bind() and connect() for the respective address will fail. In this
+ * function, we test if such a left-over file exists, and if so,
+ * remove it (unless there is a listening service at the address).
+ *
+ * @param un unix domain socket address to check
+ */
+void
+GNUNET_NETWORK_unix_precheck (const struct sockaddr_un *un)
+{
+ int s;
+ int eno;
+ struct stat sbuf;
+ int ret;
+
+ s = socket (AF_UNIX, SOCK_STREAM, 0);
+ if (-1 == s)
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
+ "Failed to open AF_UNIX socket");
+ return;
+ }
+ ret = connect (s,
+ (struct sockaddr *) un,
+ sizeof (struct sockaddr_un));
+ eno = errno;
+ GNUNET_break (0 == close (s));
+ if (0 == ret)
+ return; /* another process is listening, do not remove! */
+ if (ECONNREFUSED != eno)
+ return; /* some other error, likely "no such file or directory" -- all well */
+ /* should unlink, but sanity checks first */
+ if (0 != stat (un->sun_path,
+ &sbuf))
+ return; /* failed to 'stat', likely does not exist after all */
+ if (S_IFSOCK != (S_IFMT & sbuf.st_mode))
+ return; /* refuse to unlink anything except sockets */
+ /* finally, really unlink */
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "Removing left-over `%s' from previous exeuction\n",
+ un->sun_path);
+ if (0 != unlink (un->sun_path))
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
+ "unlink",
+ un->sun_path);
+}
+#endif
+
+
+
#ifndef FD_COPY
-#define FD_COPY(s, d) (memcpy ((d), (s), sizeof (fd_set)))
+#define FD_COPY(s, d) do { GNUNET_memcpy ((d), (s), sizeof (fd_set)); } while (0)
#endif
#endif
#endif
#ifndef WINDOWS
+ if (AF_UNIX == address->sa_family)
+ GNUNET_NETWORK_unix_precheck ((const struct sockaddr_un *) address);
{
const int on = 1;
LOG_STRERROR (GNUNET_ERROR_TYPE_DEBUG,
"setsockopt");
}
-#endif
-#ifndef WINDOWS
{
/* set permissions of newly created non-abstract UNIX domain socket to
"user-only"; applications can choose to relax this later */
mode_t old_mask = 0; /* assigned to make compiler happy */
- const struct sockaddr_un *un;
+ const struct sockaddr_un *un = (const struct sockaddr_un *) address;
int not_abstract = 0;
if ((AF_UNIX == address->sa_family)
- && (NULL != (un = (const struct sockaddr_un *) address)->sun_path)
&& ('\0' != un->sun_path[0]) ) /* Not an abstract socket */
not_abstract = 1;
if (not_abstract)
old_mask = umask (S_IWGRP | S_IRGRP | S_IXGRP | S_IWOTH | S_IROTH | S_IXOTH);
#endif
- ret = bind (desc->fd, address, address_len);
+ ret = bind (desc->fd,
+ address,
+ address_len);
+
#ifndef WINDOWS
if (not_abstract)
(void) umask (old_mask);
if (SOCKET_ERROR == ret)
SetErrnoFromWinsockError (WSAGetLastError ());
#endif
- if (ret != 0)
+ if (0 != ret)
return GNUNET_SYSERR;
#ifndef MINGW
desc->addr = GNUNET_malloc (address_len);
- memcpy (desc->addr, address, address_len);
+ GNUNET_memcpy (desc->addr, address, address_len);
desc->addrlen = address_len;
#endif
return GNUNET_OK;
ret = close (desc->fd);
#endif
#ifndef WINDOWS
- const struct sockaddr_un *un;
+ const struct sockaddr_un *un = (const struct sockaddr_un *) desc->addr;
/* Cleanup the UNIX domain socket and its parent directories in case of non
abstract sockets */
if ( (AF_UNIX == desc->af) &&
(NULL != desc->addr) &&
- (NULL != (un = (const struct sockaddr_un *) desc->addr)->sun_path) &&
('\0' != un->sun_path[0]) )
{
char *dirname = GNUNET_strndup (un->sun_path,
* How much data is available to be read on this descriptor?
*
* @param desc socket
- * @returns #GNUNET_NO if no data is available, or on error!
+ * @returns #GNUNET_SYSERR if no data is available, or on error!
*/
ssize_t
GNUNET_NETWORK_socket_recvfrom_amount (const struct GNUNET_NETWORK_Handle *desc)
error = ioctl (desc->fd,
FIONREAD,
&pending);
- if (error == 0)
+ if (0 == error)
return (ssize_t) pending;
- return GNUNET_NO;
+ return GNUNET_SYSERR;
#else
u_long pending;
&pending);
if (error != SOCKET_ERROR)
return (ssize_t) pending;
- return GNUNET_NO;
+ return GNUNET_SYSERR;
#endif
}
GNUNET_array_grow (to->handles,
to->handles_size,
from->handles_pos * 2);
- memcpy (to->handles,
+ GNUNET_memcpy (to->handles,
from->handles,
from->handles_pos * sizeof (struct GNUNET_NETWORK_Handle *));
to->handles_pos = from->handles_pos;
#endif
+/**
+ * Test if the given @a port is available.
+ *
+ * @param ipproto transport protocol to test (i.e. IPPROTO_TCP)
+ * @param port port number to test
+ * @return #GNUNET_OK if the port is available, #GNUNET_NO if not
+ */
+int
+GNUNET_NETWORK_test_port_free (int ipproto,
+ uint16_t port)
+{
+ struct GNUNET_NETWORK_Handle *socket;
+ int bind_status;
+ int socktype;
+ char open_port_str[6];
+ struct addrinfo hint;
+ struct addrinfo *ret;
+ struct addrinfo *ai;
+
+ GNUNET_snprintf (open_port_str,
+ sizeof (open_port_str),
+ "%u",
+ (unsigned int) port);
+ socktype = (IPPROTO_TCP == ipproto)
+ ? SOCK_STREAM
+ : SOCK_DGRAM;
+ ret = NULL;
+ memset (&hint, 0, sizeof (hint));
+ hint.ai_family = AF_UNSPEC; /* IPv4 and IPv6 */
+ hint.ai_socktype = socktype;
+ hint.ai_protocol = ipproto;
+ hint.ai_addrlen = 0;
+ hint.ai_addr = NULL;
+ hint.ai_canonname = NULL;
+ hint.ai_next = NULL;
+ hint.ai_flags = AI_PASSIVE | AI_NUMERICSERV; /* Wild card address */
+ GNUNET_assert (0 == getaddrinfo (NULL,
+ open_port_str,
+ &hint,
+ &ret));
+ for (ai = ret; NULL != ai; ai = ai->ai_next)
+ {
+ socket = GNUNET_NETWORK_socket_create (ai->ai_family,
+ ai->ai_socktype,
+ ai->ai_protocol);
+ if (NULL == socket)
+ continue;
+ bind_status = GNUNET_NETWORK_socket_bind (socket,
+ ai->ai_addr,
+ ai->ai_addrlen);
+ GNUNET_NETWORK_socket_close (socket);
+ if (GNUNET_OK != bind_status)
+ break;
+ }
+ freeaddrinfo (ret);
+ return bind_status;
+}
+
#ifndef MINGW
/**
projects / oweals / gnunet.git / blobdiff