--- /dev/null
+/* "net_db.c" network database support
+ * Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2006, 2009 Free Software Foundation, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+
+/* Written in 1994 by Aubrey Jaffer.
+ * Thanks to Hallvard.Tretteberg@si.sintef.no for inspiration and discussion.
+ * Rewritten by Gary Houston to be a closer interface to the C socket library.
+ * Split into net_db.c and socket.c.
+ */
+\f
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <errno.h>
+
+#include "libguile/_scm.h"
+#include "libguile/feature.h"
+#include "libguile/strings.h"
+#include "libguile/vectors.h"
+#include "libguile/dynwind.h"
+
+#include "libguile/validate.h"
+#include "libguile/net_db.h"
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
+#include <sys/types.h>
+
+#ifdef HAVE_WINSOCK2_H
+#include <winsock2.h>
+#else
+#include <sys/socket.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#endif
+
+#ifdef __MINGW32__
+#include "win32-socket.h"
+#endif
+
+#if !defined (HAVE_H_ERRNO) && !defined (__MINGW32__) && !defined (__CYGWIN__)
+/* h_errno not found in netdb.h, maybe this will help. */
+extern int h_errno;
+#endif
+
+#if defined HAVE_HSTRERROR && !HAVE_DECL_HSTRERROR \
+ && !defined __MINGW32__ && !defined __CYGWIN__
+/* Some OSes, such as Tru64 5.1b, lack a declaration for hstrerror(3). */
+extern const char *hstrerror (int);
+#endif
+
+\f
+
+SCM_SYMBOL (scm_host_not_found_key, "host-not-found");
+SCM_SYMBOL (scm_try_again_key, "try-again");
+SCM_SYMBOL (scm_no_recovery_key, "no-recovery");
+SCM_SYMBOL (scm_no_data_key, "no-data");
+
+static void scm_resolv_error (const char *subr, SCM bad_value)
+{
+#ifdef NETDB_INTERNAL
+ if (h_errno == NETDB_INTERNAL)
+ {
+ /* errno supposedly contains a useful value. */
+ scm_syserror (subr);
+ }
+ else
+#endif
+ {
+ SCM key;
+ const char *errmsg;
+
+ switch (h_errno)
+ {
+ case HOST_NOT_FOUND:
+ key = scm_host_not_found_key;
+ errmsg = "Unknown host";
+ break;
+ case TRY_AGAIN:
+ key = scm_try_again_key;
+ errmsg = "Host name lookup failure";
+ break;
+ case NO_RECOVERY:
+ key = scm_no_recovery_key;
+ errmsg = "Unknown server error";
+ break;
+ case NO_DATA:
+ key = scm_no_data_key;
+ errmsg = "No address associated with name";
+ break;
+ default:
+ scm_misc_error (subr, "Unknown resolver error", SCM_EOL);
+ errmsg = NULL;
+ }
+
+#ifdef HAVE_HSTRERROR
+ errmsg = (const char *) hstrerror (h_errno);
+#endif
+ scm_error (key, subr, errmsg, SCM_BOOL_F, SCM_EOL);
+ }
+}
+
+/* Should take an extra arg for address format (will be needed for IPv6).
+ Should use reentrant facilities if available.
+ */
+
+SCM_DEFINE (scm_gethost, "gethost", 0, 1, 0,
+ (SCM host),
+ "@deffnx {Scheme Procedure} gethostbyname hostname\n"
+ "@deffnx {Scheme Procedure} gethostbyaddr address\n"
+ "Look up a host by name or address, returning a host object. The\n"
+ "@code{gethost} procedure will accept either a string name or an integer\n"
+ "address; if given no arguments, it behaves like @code{gethostent} (see\n"
+ "below). If a name or address is supplied but the address can not be\n"
+ "found, an error will be thrown to one of the keys:\n"
+ "@code{host-not-found}, @code{try-again}, @code{no-recovery} or\n"
+ "@code{no-data}, corresponding to the equivalent @code{h_error} values.\n"
+ "Unusual conditions may result in errors thrown to the\n"
+ "@code{system-error} or @code{misc_error} keys.")
+#define FUNC_NAME s_scm_gethost
+{
+ SCM result = scm_c_make_vector (5, SCM_UNSPECIFIED);
+ SCM lst = SCM_EOL;
+ struct hostent *entry;
+ struct in_addr inad;
+ char **argv;
+ int i = 0;
+
+ if (SCM_UNBNDP (host))
+ {
+#ifdef HAVE_GETHOSTENT
+ entry = gethostent ();
+#else
+ entry = NULL;
+#endif
+ if (! entry)
+ {
+ /* As far as I can tell, there's no good way to tell whether
+ zero means an error or end-of-file. The trick of
+ clearing errno before calling gethostent and checking it
+ afterwards doesn't cut it, because, on Linux, it seems to
+ try to contact some other server (YP?) and fails, which
+ is a benign failure. */
+ return SCM_BOOL_F;
+ }
+ }
+ else if (scm_is_string (host))
+ {
+ char *str = scm_to_locale_string (host);
+ entry = gethostbyname (str);
+ free (str);
+ }
+ else
+ {
+ inad.s_addr = htonl (scm_to_ulong (host));
+ entry = gethostbyaddr ((char *) &inad, sizeof (inad), AF_INET);
+ }
+
+ if (!entry)
+ scm_resolv_error (FUNC_NAME, host);
+
+ SCM_SIMPLE_VECTOR_SET(result, 0, scm_from_locale_string (entry->h_name));
+ SCM_SIMPLE_VECTOR_SET(result, 1, scm_makfromstrs (-1, entry->h_aliases));
+ SCM_SIMPLE_VECTOR_SET(result, 2, scm_from_int (entry->h_addrtype));
+ SCM_SIMPLE_VECTOR_SET(result, 3, scm_from_int (entry->h_length));
+ if (sizeof (struct in_addr) != entry->h_length)
+ {
+ SCM_SIMPLE_VECTOR_SET(result, 4, SCM_BOOL_F);
+ return result;
+ }
+ for (argv = entry->h_addr_list; argv[i]; i++);
+ while (i--)
+ {
+ inad = *(struct in_addr *) argv[i];
+ lst = scm_cons (scm_from_ulong (ntohl (inad.s_addr)), lst);
+ }
+ SCM_SIMPLE_VECTOR_SET(result, 4, lst);
+ return result;
+}
+#undef FUNC_NAME
+
+
+/* In all subsequent getMUMBLE functions, when we're called with no
+ arguments, we're supposed to traverse the tables entry by entry.
+ However, there doesn't seem to be any documented way to distinguish
+ between end-of-table and an error; in both cases the functions
+ return zero. Gotta love Unix. For the time being, we clear errno,
+ and if we get a zero and errno is set, we signal an error. This
+ doesn't seem quite right (what if errno gets set as part of healthy
+ operation?), but it seems to work okay. We'll see. */
+
+#if defined(HAVE_GETNETENT) && defined(HAVE_GETNETBYNAME) && defined(HAVE_GETNETBYADDR)
+SCM_DEFINE (scm_getnet, "getnet", 0, 1, 0,
+ (SCM net),
+ "@deffnx {Scheme Procedure} getnetbyname net-name\n"
+ "@deffnx {Scheme Procedure} getnetbyaddr net-number\n"
+ "Look up a network by name or net number in the network database. The\n"
+ "@var{net-name} argument must be a string, and the @var{net-number}\n"
+ "argument must be an integer. @code{getnet} will accept either type of\n"
+ "argument, behaving like @code{getnetent} (see below) if no arguments are\n"
+ "given.")
+#define FUNC_NAME s_scm_getnet
+{
+ SCM result = scm_c_make_vector (4, SCM_UNSPECIFIED);
+ struct netent *entry;
+ int eno;
+
+ if (SCM_UNBNDP (net))
+ {
+ entry = getnetent ();
+ if (! entry)
+ {
+ /* There's no good way to tell whether zero means an error
+ or end-of-file, so we always return #f. See `gethost'
+ for details. */
+ return SCM_BOOL_F;
+ }
+ }
+ else if (scm_is_string (net))
+ {
+ char *str = scm_to_locale_string (net);
+ entry = getnetbyname (str);
+ eno = errno;
+ free (str);
+ }
+ else
+ {
+ unsigned long netnum = scm_to_ulong (net);
+ entry = getnetbyaddr (netnum, AF_INET);
+ eno = errno;
+ }
+
+ if (!entry)
+ SCM_SYSERROR_MSG ("no such network ~A", scm_list_1 (net), eno);
+
+ SCM_SIMPLE_VECTOR_SET(result, 0, scm_from_locale_string (entry->n_name));
+ SCM_SIMPLE_VECTOR_SET(result, 1, scm_makfromstrs (-1, entry->n_aliases));
+ SCM_SIMPLE_VECTOR_SET(result, 2, scm_from_int (entry->n_addrtype));
+ SCM_SIMPLE_VECTOR_SET(result, 3, scm_from_ulong (entry->n_net));
+ return result;
+}
+#undef FUNC_NAME
+#endif
+
+#if defined (HAVE_GETPROTOENT) || defined (__MINGW32__)
+SCM_DEFINE (scm_getproto, "getproto", 0, 1, 0,
+ (SCM protocol),
+ "@deffnx {Scheme Procedure} getprotobyname name\n"
+ "@deffnx {Scheme Procedure} getprotobynumber number\n"
+ "Look up a network protocol by name or by number. @code{getprotobyname}\n"
+ "takes a string argument, and @code{getprotobynumber} takes an integer\n"
+ "argument. @code{getproto} will accept either type, behaving like\n"
+ "@code{getprotoent} (see below) if no arguments are supplied.")
+#define FUNC_NAME s_scm_getproto
+{
+ SCM result = scm_c_make_vector (3, SCM_UNSPECIFIED);
+ struct protoent *entry;
+ int eno;
+
+ if (SCM_UNBNDP (protocol))
+ {
+ entry = getprotoent ();
+ if (! entry)
+ {
+ /* There's no good way to tell whether zero means an error
+ or end-of-file, so we always return #f. See `gethost'
+ for details. */
+ return SCM_BOOL_F;
+ }
+ }
+ else if (scm_is_string (protocol))
+ {
+ char *str = scm_to_locale_string (protocol);
+ entry = getprotobyname (str);
+ eno = errno;
+ free (str);
+ }
+ else
+ {
+ unsigned long protonum = scm_to_ulong (protocol);
+ entry = getprotobynumber (protonum);
+ eno = errno;
+ }
+
+ if (!entry)
+ SCM_SYSERROR_MSG ("no such protocol ~A", scm_list_1 (protocol), eno);
+
+ SCM_SIMPLE_VECTOR_SET(result, 0, scm_from_locale_string (entry->p_name));
+ SCM_SIMPLE_VECTOR_SET(result, 1, scm_makfromstrs (-1, entry->p_aliases));
+ SCM_SIMPLE_VECTOR_SET(result, 2, scm_from_int (entry->p_proto));
+ return result;
+}
+#undef FUNC_NAME
+#endif
+
+#if defined (HAVE_GETSERVENT) || defined (__MINGW32__)
+static SCM
+scm_return_entry (struct servent *entry)
+{
+ SCM result = scm_c_make_vector (4, SCM_UNSPECIFIED);
+
+ SCM_SIMPLE_VECTOR_SET(result, 0, scm_from_locale_string (entry->s_name));
+ SCM_SIMPLE_VECTOR_SET(result, 1, scm_makfromstrs (-1, entry->s_aliases));
+ SCM_SIMPLE_VECTOR_SET(result, 2, scm_from_uint16 (ntohs (entry->s_port)));
+ SCM_SIMPLE_VECTOR_SET(result, 3, scm_from_locale_string (entry->s_proto));
+ return result;
+}
+
+SCM_DEFINE (scm_getserv, "getserv", 0, 2, 0,
+ (SCM name, SCM protocol),
+ "@deffnx {Scheme Procedure} getservbyname name protocol\n"
+ "@deffnx {Scheme Procedure} getservbyport port protocol\n"
+ "Look up a network service by name or by service number, and return a\n"
+ "network service object. The @var{protocol} argument specifies the name\n"
+ "of the desired protocol; if the protocol found in the network service\n"
+ "database does not match this name, a system error is signalled.\n\n"
+ "The @code{getserv} procedure will take either a service name or number\n"
+ "as its first argument; if given no arguments, it behaves like\n"
+ "@code{getservent} (see below).")
+#define FUNC_NAME s_scm_getserv
+{
+ struct servent *entry;
+ char *protoname;
+ int eno;
+
+ if (SCM_UNBNDP (name))
+ {
+ entry = getservent ();
+ if (!entry)
+ {
+ /* There's no good way to tell whether zero means an error
+ or end-of-file, so we always return #f. See `gethost'
+ for details. */
+ return SCM_BOOL_F;
+ }
+ return scm_return_entry (entry);
+ }
+
+ scm_dynwind_begin (0);
+
+ protoname = scm_to_locale_string (protocol);
+ scm_dynwind_free (protoname);
+
+ if (scm_is_string (name))
+ {
+ char *str = scm_to_locale_string (name);
+ entry = getservbyname (str, protoname);
+ eno = errno;
+ free (str);
+ }
+ else
+ {
+ entry = getservbyport (htons (scm_to_int (name)), protoname);
+ eno = errno;
+ }
+
+ if (!entry)
+ SCM_SYSERROR_MSG("no such service ~A", scm_list_1 (name), eno);
+
+ scm_dynwind_end ();
+ return scm_return_entry (entry);
+}
+#undef FUNC_NAME
+#endif
+
+#if defined(HAVE_SETHOSTENT) && defined(HAVE_ENDHOSTENT)
+SCM_DEFINE (scm_sethost, "sethost", 0, 1, 0,
+ (SCM stayopen),
+ "If @var{stayopen} is omitted, this is equivalent to @code{endhostent}.\n"
+ "Otherwise it is equivalent to @code{sethostent stayopen}.")
+#define FUNC_NAME s_scm_sethost
+{
+ if (SCM_UNBNDP (stayopen))
+ endhostent ();
+ else
+ sethostent (scm_is_true (stayopen));
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+#endif
+
+#if defined(HAVE_SETNETENT) && defined(HAVE_ENDNETENT)
+SCM_DEFINE (scm_setnet, "setnet", 0, 1, 0,
+ (SCM stayopen),
+ "If @var{stayopen} is omitted, this is equivalent to @code{endnetent}.\n"
+ "Otherwise it is equivalent to @code{setnetent stayopen}.")
+#define FUNC_NAME s_scm_setnet
+{
+ if (SCM_UNBNDP (stayopen))
+ endnetent ();
+ else
+ setnetent (scm_is_true (stayopen));
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+#endif
+
+#if defined (HAVE_SETPROTOENT) && defined (HAVE_ENDPROTOENT) || defined (__MINGW32__)
+SCM_DEFINE (scm_setproto, "setproto", 0, 1, 0,
+ (SCM stayopen),
+ "If @var{stayopen} is omitted, this is equivalent to @code{endprotoent}.\n"
+ "Otherwise it is equivalent to @code{setprotoent stayopen}.")
+#define FUNC_NAME s_scm_setproto
+{
+ if (SCM_UNBNDP (stayopen))
+ endprotoent ();
+ else
+ setprotoent (scm_is_true (stayopen));
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+#endif
+
+#if defined (HAVE_SETSERVENT) && defined (HAVE_ENDSERVENT) || defined (__MINGW32__)
+SCM_DEFINE (scm_setserv, "setserv", 0, 1, 0,
+ (SCM stayopen),
+ "If @var{stayopen} is omitted, this is equivalent to @code{endservent}.\n"
+ "Otherwise it is equivalent to @code{setservent stayopen}.")
+#define FUNC_NAME s_scm_setserv
+{
+ if (SCM_UNBNDP (stayopen))
+ endservent ();
+ else
+ setservent (scm_is_true (stayopen));
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+#endif
+
+
+void
+scm_init_net_db ()
+{
+ scm_add_feature ("net-db");
+#include "libguile/net_db.x"
+}
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
projects / lilypond.git / blobdiff