/* Establishing and handling network connections.
- Copyright (C) 1995, 1996, 1997, 2001, 2002 Free Software Foundation, Inc.
+ Copyright (C) 1996-2005 Free Software Foundation, Inc.
This file is part of GNU Wget.
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with Wget; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+along with Wget; if not, write to the Free Software Foundation, Inc.,
+51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
In addition, as a special exception, the Free Software Foundation
gives permission to link the code of its release of Wget with the
#include <stdio.h>
#include <stdlib.h>
-#include <sys/types.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#endif /* not WINDOWS */
#include <errno.h>
-#ifdef HAVE_STRING_H
-# include <string.h>
-#else
-# include <strings.h>
-#endif /* HAVE_STRING_H */
+#include <string.h>
#ifdef HAVE_SYS_SELECT_H
# include <sys/select.h>
#endif /* HAVE_SYS_SELECT_H */
#include "connect.h"
#include "hash.h"
-#ifndef errno
-extern int errno;
-#endif
-
/* Define sockaddr_storage where unavailable (presumably on IPv4-only
hosts). */
case IPV4_ADDRESS:
{
struct sockaddr_in *sin = (struct sockaddr_in *)sa;
+ xzero (*sin);
sin->sin_family = AF_INET;
sin->sin_port = htons (port);
sin->sin_addr = ADDRESS_IPV4_IN_ADDR (ip);
case IPV6_ADDRESS:
{
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
+ xzero (*sin6);
sin6->sin6_family = AF_INET6;
sin6->sin6_port = htons (port);
sin6->sin6_addr = ADDRESS_IPV6_IN6_ADDR (ip);
#endif
default:
abort ();
- return 0; /* so the compiler shuts up. */
}
}
\f
-static int
+/* Resolve the bind address specified via --bind-address and store it
+ to SA. The resolved value is stored in a static variable and
+ reused after the first invocation of this function.
+
+ Returns true on success, false on failure. */
+
+static bool
resolve_bind_address (struct sockaddr *sa)
{
struct address_list *al;
/* Make sure this is called only once. opt.bind_address doesn't
change during a Wget run. */
- static int called, should_bind;
+ static bool called, should_bind;
static ip_address ip;
if (called)
{
sockaddr_set_data (sa, &ip, 0);
return should_bind;
}
- called = 1;
+ called = true;
al = lookup_host (opt.bind_address, LH_BIND | LH_SILENT);
if (!al)
logprintf (LOG_NOTQUIET,
_("%s: unable to resolve bind address `%s'; disabling bind.\n"),
exec_name, opt.bind_address);
- should_bind = 0;
- return 0;
+ should_bind = false;
+ return false;
}
/* Pick the first address in the list and use it as bind address.
address_list_release (al);
sockaddr_set_data (sa, &ip, 0);
- should_bind = 1;
- return 1;
+ should_bind = true;
+ return true;
}
\f
struct cwt_context {
{
struct sockaddr_storage ss;
struct sockaddr *sa = (struct sockaddr *)&ss;
- int sock = -1;
+ int sock;
/* If PRINT is non-NULL, print the "Connecting to..." line, with
PRINT being the host name we're connecting to. */
if (print)
{
- const char *txt_addr = pretty_print_address (ip);
+ const char *txt_addr = print_address (ip);
if (print && 0 != strcmp (print, txt_addr))
- logprintf (LOG_VERBOSE,
- _("Connecting to %s|%s|:%d... "), print, txt_addr, port);
+ logprintf (LOG_VERBOSE, _("Connecting to %s|%s|:%d... "),
+ escnonprint (print), txt_addr, port);
else
logprintf (LOG_VERBOSE, _("Connecting to %s:%d... "), txt_addr, port);
}
if (sock < 0)
goto err;
+#if defined(ENABLE_IPV6) && defined(IPV6_V6ONLY)
+ if (opt.ipv6_only) {
+ int on = 1;
+ /* In case of error, we will go on anyway... */
+ int err = setsockopt (sock, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof (on));
+ IF_DEBUG
+ if (err < 0)
+ DEBUGP (("Failed setting IPV6_V6ONLY: %s", strerror (errno)));
+ }
+#endif
+
/* For very small rate limits, set the buffer size (and hence,
hopefully, the kernel's TCP window size) to the per-second limit.
That way we should never have to sleep for more than 1s between
if (sock >= 0)
fd_close (sock);
if (print)
- logprintf (LOG_VERBOSE, "failed: %s.\n", strerror (errno));
+ logprintf (LOG_VERBOSE, _("failed: %s.\n"), strerror (errno));
errno = save_errno;
return -1;
}
return -1;
}
sockaddr_get_data (sa, NULL, port);
- DEBUGP (("binding to address %s using port %i.\n",
- pretty_print_address (bind_address), *port));
+ DEBUGP (("binding to address %s using port %i.\n",
+ print_address (bind_address), *port));
}
if (listen (sock, 1) < 0)
{
}
/* Get the IP address associated with the connection on FD and store
- it to IP. Return 1 on success, 0 otherwise.
+ it to IP. Return true on success, false otherwise.
If ENDPOINT is ENDPOINT_LOCAL, it returns the address of the local
(client) side of the socket. Else if ENDPOINT is ENDPOINT_PEER, it
returns the address of the remote (peer's) side of the socket. */
-int
+bool
socket_ip_address (int sock, ip_address *ip, int endpoint)
{
struct sockaddr_storage storage;
else
abort ();
if (ret < 0)
- return 0;
+ return false;
switch (sockaddr->sa_family)
{
#ifdef HAVE_SOCKADDR_IN6_SCOPE_ID
ADDRESS_IPV6_SCOPE (ip) = sa6->sin6_scope_id;
#endif
- DEBUGP (("conaddr is: %s\n", pretty_print_address (ip)));
- return 1;
+ DEBUGP (("conaddr is: %s\n", print_address (ip)));
+ return true;
}
#endif
case AF_INET:
struct sockaddr_in *sa = (struct sockaddr_in *)&storage;
ip->type = IPV4_ADDRESS;
ADDRESS_IPV4_IN_ADDR (ip) = sa->sin_addr;
- DEBUGP (("conaddr is: %s\n", pretty_print_address (ip)));
- return 1;
+ DEBUGP (("conaddr is: %s\n", print_address (ip)));
+ return true;
}
default:
abort ();
}
-
- return 0;
}
-/* Return non-zero if the error from the connect code can be
- considered retryable. Wget normally retries after errors, but the
- exception are the "unsupported protocol" type errors (possible on
- IPv4/IPv6 dual family systems) and "connection refused". */
+/* Return true if the error from the connect code can be considered
+ retryable. Wget normally retries after errors, but the exception
+ are the "unsupported protocol" type errors (possible on IPv4/IPv6
+ dual family systems) and "connection refused". */
-int
+bool
retryable_socket_connect_error (int err)
{
/* Have to guard against some of these values not being defined.
Cannot use a switch statement because some of the values might be
equal. */
- if (0
+ if (false
#ifdef EAFNOSUPPORT
|| err == EAFNOSUPPORT
#endif
instead of EAFNOSUPPORT and such. */
|| err == EINVAL
)
- return 0;
-
- if (err == ECONNREFUSED && !opt.retry_connrefused)
- return 0;
-
- return 1;
-}
+ return false;
-#ifdef ENABLE_IPV6
-# ifndef HAVE_GETADDRINFO_AI_ADDRCONFIG
-
-/* Return non-zero if the INET6 socket family is supported on the
- system.
-
- This doesn't guarantee that we're able to connect to IPv6 hosts,
- but it's better than nothing. It is only used on systems where
- getaddrinfo doesn't support AI_ADDRCONFIG. (See lookup_host.) */
+ if (!opt.retry_connrefused)
+ if (err == ECONNREFUSED
+#ifdef ENETUNREACH
+ || err == ENETUNREACH /* network is unreachable */
+#endif
+#ifdef EHOSTUNREACH
+ || err == EHOSTUNREACH /* host is unreachable */
+#endif
+ )
+ return false;
-int
-socket_has_inet6 (void)
-{
- static int supported = -1;
- if (supported == -1)
- {
- int sock = socket (AF_INET6, SOCK_STREAM, 0);
- if (sock < 0)
- supported = 0;
- else
- {
- fd_close (sock);
- supported = 1;
- }
- }
- return supported;
+ return true;
}
-# endif/* not HAVE_GETADDRINFO_AI_ADDRCONFIG */
-#endif /* ENABLE_IPV6 */
-
/* Wait for a single descriptor to become available, timing out after
MAXTIME seconds. Returns 1 if FD is available, 0 for timeout and
-1 for error. The argument WAIT_FOR can be a combination of
int
select_fd (int fd, double maxtime, int wait_for)
{
-#ifdef HAVE_SELECT
fd_set fdset;
fd_set *rd = NULL, *wr = NULL;
struct timeval tmout;
wr = &fdset;
tmout.tv_sec = (long) maxtime;
- tmout.tv_usec = 1000000L * (maxtime - (long) maxtime);
+ tmout.tv_usec = 1000000 * (maxtime - (long) maxtime);
do
result = select (fd + 1, rd, wr, NULL, &tmout);
while (result < 0 && errno == EINTR);
return result;
-
-#else /* not HAVE_SELECT */
-
- /* If select() unavailable, just return 1. In most usages in Wget,
- this is the appropriate response -- "if we can't poll, go ahead
- with the blocking operation". If a specific part of code needs
- different behavior, it can use #ifdef HAVE_SELECT to test whether
- polling really occurs. */
- return 1;
-
-#endif /* not HAVE_SELECT */
}
-int
+bool
test_socket_open (int sock)
{
-#ifdef HAVE_SELECT
fd_set check_set;
struct timeval to;
if (select (sock + 1, &check_set, NULL, NULL, &to) == 0)
{
/* Connection is valid (not EOF), so continue */
- return 1;
+ return true;
}
else
- return 0;
-#else
- /* Without select, it's hard to know for sure. */
- return 1;
-#endif
+ return false;
}
\f
/* Basic socket operations, mostly EINTR wrappers. */
++transport_map_modified_tick;
}
+/* Return context of the transport registered with
+ fd_register_transport. This assumes fd_register_transport was
+ previously called on FD. */
+
+void *
+fd_transport_context (int fd)
+{
+ struct transport_info *info = hash_table_get (transport_map, (void *) fd);
+ return info->ctx;
+}
+
/* When fd_read/fd_write are called multiple times in a loop, they should
remember the INFO pointer instead of fetching it every time. It is
not enough to compare FD to LAST_FD because FD might have been
} \
} while (0)
-static int
+static bool
poll_internal (int fd, struct transport_info *info, int wf, double timeout)
{
if (timeout == -1)
if (test == 0)
errno = ETIMEDOUT;
if (test <= 0)
- return 0;
+ return false;
}
- return 1;
+ return true;
}
/* Read no more than BUFSIZE bytes of data from FD, storing them to
return sock_read (fd, buf, bufsize);
}
-/* The same as xread, but don't actually read the data, just copy it
- instead. */
+/* Like fd_read, except it provides a "preview" of the data that will
+ be read by subsequent calls to fd_read. Specifically, it copies no
+ more than BUFSIZE bytes of the currently available data to BUF and
+ returns the number of bytes copied. Return values and timeout
+ semantics are the same as those of fd_read.
+
+ CAVEAT: Do not assume that the first subsequent call to fd_read
+ will retrieve the same amount of data. Reading can return more or
+ less data, depending on the TCP implementation and other
+ circumstances. However, barring an error, it can be expected that
+ all the peeked data will eventually be read by fd_read. */
int
fd_peek (int fd, char *buf, int bufsize, double timeout)
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