+++ /dev/null
-/* "net_db.c" network database support
- * Copyright (C) 1995, 96, 97, 98, 99, 2000 Free Software Foundation, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; see the file COPYING. If not, write to
- * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
- * Boston, MA 02111-1307 USA
- *
- * As a special exception, the Free Software Foundation gives permission
- * for additional uses of the text contained in its release of GUILE.
- *
- * The exception is that, if you link the GUILE library with other files
- * to produce an executable, this does not by itself cause the
- * resulting executable to be covered by the GNU General Public License.
- * Your use of that executable is in no way restricted on account of
- * linking the GUILE library code into it.
- *
- * This exception does not however invalidate any other reasons why
- * the executable file might be covered by the GNU General Public License.
- *
- * This exception applies only to the code released by the
- * Free Software Foundation under the name GUILE. If you copy
- * code from other Free Software Foundation releases into a copy of
- * GUILE, as the General Public License permits, the exception does
- * not apply to the code that you add in this way. To avoid misleading
- * anyone as to the status of such modified files, you must delete
- * this exception notice from them.
- *
- * If you write modifications of your own for GUILE, it is your choice
- * whether to permit this exception to apply to your modifications.
- * If you do not wish that, delete this exception notice. */
-
-/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
- gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
-
-
-/* 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
-
-#include <stdio.h>
-#include "libguile/_scm.h"
-#include "libguile/feature.h"
-#include "libguile/strings.h"
-#include "libguile/vectors.h"
-
-#include "libguile/validate.h"
-#include "libguile/net_db.h"
-
-#ifdef HAVE_STRING_H
-#include <string.h>
-#endif
-
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-
-/* Some systems do not declare this. Some systems do declare it, as a
- macro. */
-#ifndef h_errno
-extern int h_errno;
-#endif
-
-\f
-
-#ifndef STDC_HEADERS
-int close ();
-#endif /* STDC_HEADERS */
-
-extern in_addr_t inet_aton ();
-
-SCM_DEFINE (scm_inet_aton, "inet-aton", 1, 0, 0,
- (SCM address),
- "Converts a string containing an Internet host address in the traditional\n"
- "dotted decimal notation into an integer.\n\n"
- "@smalllisp\n"
- "(inet-aton \"127.0.0.1\") @result{} 2130706433\n\n"
- "@end smalllisp")
-#define FUNC_NAME s_scm_inet_aton
-{
- struct in_addr soka;
-
- SCM_VALIDATE_ROSTRING (1,address);
- if (SCM_SUBSTRP (address))
- address = scm_makfromstr (SCM_ROCHARS (address), SCM_ROLENGTH (address), 0);
- if (inet_aton (SCM_ROCHARS (address), &soka) == 0)
- SCM_MISC_ERROR ("bad address", SCM_EOL);
- return scm_ulong2num (ntohl (soka.s_addr));
-}
-#undef FUNC_NAME
-
-
-SCM_DEFINE (scm_inet_ntoa, "inet-ntoa", 1, 0, 0,
- (SCM inetid),
- "Converts an integer Internet host address into a string with the\n"
- "traditional dotted decimal representation.\n\n"
- "@smalllisp\n"
- "(inet-ntoa 2130706433) @result{} \"127.0.0.1\""
- "@end smalllisp")
-#define FUNC_NAME s_scm_inet_ntoa
-{
- struct in_addr addr;
- char *s;
- SCM answer;
- addr.s_addr = htonl (SCM_NUM2ULONG (1,inetid));
- s = inet_ntoa (addr);
- answer = scm_makfromstr (s, strlen (s), 0);
- return answer;
-}
-#undef FUNC_NAME
-
-#ifdef HAVE_INET_NETOF
-SCM_DEFINE (scm_inet_netof, "inet-netof", 1, 0, 0,
- (SCM address),
- "Returns the network number part of the given integer Internet address.\n\n"
- "@smalllisp\n"
- "(inet-netof 2130706433) @result{} 127\n"
- "@end smalllisp")
-#define FUNC_NAME s_scm_inet_netof
-{
- struct in_addr addr;
- addr.s_addr = htonl (SCM_NUM2ULONG (1,address));
- return scm_ulong2num ((unsigned long) inet_netof (addr));
-}
-#undef FUNC_NAME
-#endif
-
-#ifdef HAVE_INET_LNAOF
-SCM_DEFINE (scm_lnaof, "inet-lnaof", 1, 0, 0,
- (SCM address),
- "Returns the local-address-with-network part of the given Internet\n"
- "address.\n\n"
- "@smalllisp\n"
- "(inet-lnaof 2130706433) @result{} 1\n"
- "@end smalllisp")
-#define FUNC_NAME s_scm_lnaof
-{
- struct in_addr addr;
- addr.s_addr = htonl (SCM_NUM2ULONG (1,address));
- return scm_ulong2num ((unsigned long) inet_lnaof (addr));
-}
-#undef FUNC_NAME
-#endif
-
-#ifdef HAVE_INET_MAKEADDR
-SCM_DEFINE (scm_inet_makeaddr, "inet-makeaddr", 2, 0, 0,
- (SCM net, SCM lna),
- "Makes an Internet host address by combining the network number @var{net}\n"
- "with the local-address-within-network number @var{lna}.\n\n"
- "@smalllisp\n"
- "(inet-makeaddr 127 1) @result{} 2130706433\n"
- "@end smalllisp")
-#define FUNC_NAME s_scm_inet_makeaddr
-{
- struct in_addr addr;
- unsigned long netnum;
- unsigned long lnanum;
-
-#if 0 /* GJB:FIXME:: */
- SCM_VALIDATE_INUM_COPY (1,net,netnum);
- SCM_VALIDATE_INUM_COPY (2,lna,lnanum);
-#else
- netnum = SCM_NUM2ULONG (1, net);
- lnanum = SCM_NUM2ULONG (2, lna);
-#endif
- addr = inet_makeaddr (netnum, lnanum);
- return scm_ulong2num (ntohl (addr.s_addr));
-}
-#undef FUNC_NAME
-#endif
-
-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_cons (bad_value, SCM_EOL), 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 name),
- "@deffnx procedure gethostbyname hostname\n"
- "@deffnx 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 ans = scm_make_vector (SCM_MAKINUM (5), SCM_UNSPECIFIED);
- SCM *ve = SCM_VELTS (ans);
- SCM lst = SCM_EOL;
- struct hostent *entry;
- struct in_addr inad;
- char **argv;
- int i = 0;
- if (SCM_UNBNDP (name))
- {
-#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_ROSTRINGP (name))
- {
- SCM_COERCE_SUBSTR (name);
- entry = gethostbyname (SCM_ROCHARS (name));
- }
- else
- {
- inad.s_addr = htonl (SCM_NUM2ULONG (1,name));
- entry = gethostbyaddr ((char *) &inad, sizeof (inad), AF_INET);
- }
- if (!entry)
- scm_resolv_error (FUNC_NAME, name);
-
- ve[0] = scm_makfromstr (entry->h_name,
- (scm_sizet) strlen (entry->h_name), 0);
- ve[1] = scm_makfromstrs (-1, entry->h_aliases);
- ve[2] = SCM_MAKINUM (entry->h_addrtype + 0L);
- ve[3] = SCM_MAKINUM (entry->h_length + 0L);
- if (sizeof (struct in_addr) != entry->h_length)
- {
- ve[4] = SCM_BOOL_F;
- return ans;
- }
- for (argv = entry->h_addr_list; argv[i]; i++);
- while (i--)
- {
- inad = *(struct in_addr *) argv[i];
- lst = scm_cons (scm_ulong2num (ntohl (inad.s_addr)), lst);
- }
- ve[4] = lst;
- return ans;
-}
-#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 name),
- "@deffnx procedure getnetbyname net-name\n"
- "@deffnx 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 ans;
- SCM *ve;
- struct netent *entry;
-
- ans = scm_make_vector (SCM_MAKINUM (4), SCM_UNSPECIFIED);
- ve = SCM_VELTS (ans);
- if (SCM_UNBNDP (name))
- {
- errno = 0;
- entry = getnetent ();
- if (! entry)
- {
- if (errno)
- SCM_SYSERROR;
- else
- return SCM_BOOL_F;
- }
- }
- else if (SCM_ROSTRINGP (name))
- {
- SCM_COERCE_SUBSTR (name);
- entry = getnetbyname (SCM_ROCHARS (name));
- }
- else
- {
- unsigned long netnum;
- netnum = SCM_NUM2ULONG (1, name);
- entry = getnetbyaddr (netnum, AF_INET);
- }
- if (!entry)
- SCM_SYSERROR_MSG ("no such network ~A",
- scm_listify (name, SCM_UNDEFINED), errno);
- ve[0] = scm_makfromstr (entry->n_name, (scm_sizet) strlen (entry->n_name), 0);
- ve[1] = scm_makfromstrs (-1, entry->n_aliases);
- ve[2] = SCM_MAKINUM (entry->n_addrtype + 0L);
- ve[3] = scm_ulong2num (entry->n_net + 0L);
- return ans;
-}
-#undef FUNC_NAME
-#endif
-
-#ifdef HAVE_GETPROTOENT
-SCM_DEFINE (scm_getproto, "getproto", 0, 1, 0,
- (SCM name),
- "@deffnx procedure getprotobyname name\n"
- "@deffnx 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 ans;
- SCM *ve;
- struct protoent *entry;
-
- ans = scm_make_vector (SCM_MAKINUM (3), SCM_UNSPECIFIED);
- ve = SCM_VELTS (ans);
- if (SCM_UNBNDP (name))
- {
- errno = 0;
- entry = getprotoent ();
- if (! entry)
- {
- if (errno)
- SCM_SYSERROR;
- else
- return SCM_BOOL_F;
- }
- }
- else if (SCM_ROSTRINGP (name))
- {
- SCM_COERCE_SUBSTR (name);
- entry = getprotobyname (SCM_ROCHARS (name));
- }
- else
- {
- unsigned long protonum;
- protonum = SCM_NUM2ULONG (1,name);
- entry = getprotobynumber (protonum);
- }
- if (!entry)
- SCM_SYSERROR_MSG ("no such protocol ~A",
- scm_listify (name, SCM_UNDEFINED), errno);
- ve[0] = scm_makfromstr (entry->p_name, (scm_sizet) strlen (entry->p_name), 0);
- ve[1] = scm_makfromstrs (-1, entry->p_aliases);
- ve[2] = SCM_MAKINUM (entry->p_proto + 0L);
- return ans;
-}
-#undef FUNC_NAME
-#endif
-
-static SCM
-scm_return_entry (struct servent *entry)
-{
- SCM ans;
- SCM *ve;
-
- ans = scm_make_vector (SCM_MAKINUM (4), SCM_UNSPECIFIED);
- ve = SCM_VELTS (ans);
- ve[0] = scm_makfromstr (entry->s_name, (scm_sizet) strlen (entry->s_name), 0);
- ve[1] = scm_makfromstrs (-1, entry->s_aliases);
- ve[2] = SCM_MAKINUM (ntohs (entry->s_port) + 0L);
- ve[3] = scm_makfromstr (entry->s_proto, (scm_sizet) strlen (entry->s_proto), 0);
- return ans;
-}
-
-#ifdef HAVE_GETSERVENT
-SCM_DEFINE (scm_getserv, "getserv", 0, 2, 0,
- (SCM name, SCM proto),
- "@deffnx procedure getservbyname name protocol\n"
- "@deffnx 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;
- if (SCM_UNBNDP (name))
- {
- errno = 0;
- entry = getservent ();
- if (!entry)
- {
- if (errno)
- SCM_SYSERROR;
- else
- return SCM_BOOL_F;
- }
- return scm_return_entry (entry);
- }
- SCM_VALIDATE_ROSTRING (2,proto);
- SCM_COERCE_SUBSTR (proto);
- if (SCM_ROSTRINGP (name))
- {
- SCM_COERCE_SUBSTR (name);
- entry = getservbyname (SCM_ROCHARS (name), SCM_ROCHARS (proto));
- }
- else
- {
- SCM_VALIDATE_INUM (1,name);
- entry = getservbyport (htons (SCM_INUM (name)), SCM_ROCHARS (proto));
- }
- if (!entry)
- SCM_SYSERROR_MSG("no such service ~A",
- scm_listify (name, SCM_UNDEFINED), errno);
- 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 arg),
- "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 (arg))
- endhostent ();
- else
- sethostent (SCM_NFALSEP (arg));
- return SCM_UNSPECIFIED;
-}
-#undef FUNC_NAME
-#endif
-
-#if defined(HAVE_SETNETENT) && defined(HAVE_ENDNETENT)
-SCM_DEFINE (scm_setnet, "setnet", 0, 1, 0,
- (SCM arg),
- "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 (arg))
- endnetent ();
- else
- setnetent (SCM_NFALSEP (arg));
- return SCM_UNSPECIFIED;
-}
-#undef FUNC_NAME
-#endif
-
-#if defined(HAVE_SETPROTOENT) && defined(HAVE_ENDPROTOENT)
-SCM_DEFINE (scm_setproto, "setproto", 0, 1, 0,
- (SCM arg),
- "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 (arg))
- endprotoent ();
- else
- setprotoent (SCM_NFALSEP (arg));
- return SCM_UNSPECIFIED;
-}
-#undef FUNC_NAME
-#endif
-
-#if defined(HAVE_SETSERVENT) && defined(HAVE_ENDSERVENT)
-SCM_DEFINE (scm_setserv, "setserv", 0, 1, 0,
- (SCM arg),
- "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 (arg))
- endservent ();
- else
- setservent (SCM_NFALSEP (arg));
- return SCM_UNSPECIFIED;
-}
-#undef FUNC_NAME
-#endif
-
-
-void
-scm_init_net_db ()
-{
-#ifdef INADDR_ANY
- scm_sysintern ("INADDR_ANY", scm_ulong2num (INADDR_ANY));
-#endif
-#ifdef INADDR_BROADCAST
- scm_sysintern ("INADDR_BROADCAST", scm_ulong2num (INADDR_BROADCAST));
-#endif
-#ifdef INADDR_NONE
- scm_sysintern ("INADDR_NONE", scm_ulong2num (INADDR_NONE));
-#endif
-#ifdef INADDR_LOOPBACK
- scm_sysintern ("INADDR_LOOPBACK", scm_ulong2num (INADDR_LOOPBACK));
-#endif
-
- scm_add_feature ("net-db");
-#include "libguile/net_db.x"
-}
-
-/*
- Local Variables:
- c-file-style: "gnu"
- End:
-*/
projects / gentoo.git / commitdiff