mirror of
https://git.savannah.gnu.org/git/guile.git
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1e598865e9
gdb_interface.h, gdbint.c, gdbint.h, gh_data.c, gh_init.c, gh_io.c, gh_list.c, gh_predicates.c, gh_test_c.c, gh_test_repl.c, init.c, net_db.c, options.c, options.h, ports.c, print.c, read.c, script.h, snarf.h, srcprop.c, srcprop.h, stacks.c, stacks.h, throw.c: Update copyright years; these files have been worked on significantly in 1997, but only had copyright years for 1996. Also, change name of copyright holder on some from Mikael Djurfeldt to Free Software Foundation; he has signed papers assigning the changes to the FSF.
481 lines
12 KiB
C
481 lines
12 KiB
C
/* "net_db.c" network database support
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* Copyright (C) 1995,1996,1997 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice.
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*/
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/* Written in 1994 by Aubrey Jaffer.
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* Thanks to Hallvard.Tretteberg@si.sintef.no for inspiration and discussion.
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* Rewritten by Gary Houston to be a closer interface to the C socket library.
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* Split into net_db.c and socket.c.
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*/
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#include <stdio.h>
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#include "_scm.h"
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#include "feature.h"
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#include "net_db.h"
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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/* Some systems do not declare this. It seems unlikely to produce a
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conflict. */
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extern int h_errno;
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#ifndef STDC_HEADERS
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int close ();
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#endif /* STDC_HEADERS */
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extern int inet_aton ();
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SCM_PROC (s_inet_aton, "inet-aton", 1, 0, 0, scm_inet_aton);
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SCM
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scm_inet_aton (address)
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SCM address;
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{
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struct in_addr soka;
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SCM_ASSERT (SCM_NIMP (address) && SCM_ROSTRINGP (address), address, SCM_ARG1, s_inet_aton);
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if (SCM_SUBSTRP (address))
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address = scm_makfromstr (SCM_ROCHARS (address), SCM_ROLENGTH (address), 0);
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if (inet_aton (SCM_ROCHARS (address), &soka) == 0)
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scm_syserror (s_inet_aton);
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return scm_ulong2num (ntohl (soka.s_addr));
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}
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SCM_PROC (s_inet_ntoa, "inet-ntoa", 1, 0, 0, scm_inet_ntoa);
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SCM
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scm_inet_ntoa (inetid)
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SCM inetid;
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{
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struct in_addr addr;
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char *s;
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SCM answer;
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addr.s_addr = htonl (scm_num2ulong (inetid, (char *) SCM_ARG1, s_inet_ntoa));
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SCM_DEFER_INTS;
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s = inet_ntoa (addr);
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answer = scm_makfromstr (s, strlen (s), 0);
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SCM_ALLOW_INTS;
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return answer;
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}
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SCM_PROC (s_inet_netof, "inet-netof", 1, 0, 0, scm_inet_netof);
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SCM
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scm_inet_netof (address)
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SCM address;
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{
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struct in_addr addr;
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addr.s_addr = htonl (scm_num2ulong (address, (char *) SCM_ARG1, s_inet_netof));
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return scm_ulong2num ((unsigned long) inet_netof (addr));
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}
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SCM_PROC (s_lnaof, "inet-lnaof", 1, 0, 0, scm_lnaof);
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SCM
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scm_lnaof (address)
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SCM address;
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{
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struct in_addr addr;
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addr.s_addr = htonl (scm_num2ulong (address, (char *) SCM_ARG1, s_lnaof));
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return scm_ulong2num ((unsigned long) inet_lnaof (addr));
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}
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SCM_PROC (s_inet_makeaddr, "inet-makeaddr", 2, 0, 0, scm_inet_makeaddr);
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SCM
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scm_inet_makeaddr (net, lna)
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SCM net;
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SCM lna;
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{
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struct in_addr addr;
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unsigned long netnum;
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unsigned long lnanum;
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netnum = scm_num2ulong (net, (char *) SCM_ARG1, s_inet_makeaddr);
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lnanum = scm_num2ulong (lna, (char *) SCM_ARG2, s_inet_makeaddr);
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addr = inet_makeaddr (netnum, lnanum);
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return scm_ulong2num (ntohl (addr.s_addr));
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}
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/* !!! Doesn't take address format.
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* Assumes hostent stream isn't reused.
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*/
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SCM_PROC (s_gethost, "gethost", 0, 1, 0, scm_gethost);
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SCM
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scm_gethost (name)
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SCM name;
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{
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SCM ans = scm_make_vector (SCM_MAKINUM (5), SCM_UNSPECIFIED, SCM_BOOL_F);
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SCM *ve = SCM_VELTS (ans);
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SCM lst = SCM_EOL;
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struct hostent *entry;
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struct in_addr inad;
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char **argv;
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int i = 0;
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if (SCM_UNBNDP (name))
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{
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SCM_DEFER_INTS;
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#ifdef HAVE_GETHOSTENT
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entry = gethostent ();
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#else
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entry = NULL;
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#endif
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if (! entry)
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{
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/* As far as I can tell, there's no good way to tell whether
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zero means an error or end-of-file. The trick of
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clearing errno before calling gethostent and checking it
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afterwards doesn't cut it, because, on Linux, it seems to
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try to contact some other server (YP?) and fails, which
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is a benign failure. */
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SCM_ALLOW_INTS;
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return SCM_BOOL_F;
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}
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}
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else if (SCM_NIMP (name) && SCM_ROSTRINGP (name))
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{
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SCM_COERCE_SUBSTR (name);
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SCM_DEFER_INTS;
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entry = gethostbyname (SCM_ROCHARS (name));
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}
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else
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{
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inad.s_addr = htonl (scm_num2ulong (name, (char *) SCM_ARG1, s_gethost));
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SCM_DEFER_INTS;
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entry = gethostbyaddr ((char *) &inad, sizeof (inad), AF_INET);
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}
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SCM_ALLOW_INTS;
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if (!entry)
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{
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char *errmsg;
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SCM args;
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args = scm_listify (name, SCM_UNDEFINED);
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switch (h_errno)
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{
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case HOST_NOT_FOUND: errmsg = "host %s not found"; break;
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case TRY_AGAIN: errmsg = "nameserver failure (try later)"; break;
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case NO_RECOVERY: errmsg = "non-recoverable error"; break;
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case NO_DATA: errmsg = "no address associated with %s"; break;
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default: errmsg = "undefined error"; break;
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}
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scm_syserror_msg (s_gethost, errmsg, args, h_errno);
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}
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ve[0] = scm_makfromstr (entry->h_name, (scm_sizet) strlen (entry->h_name), 0);
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ve[1] = scm_makfromstrs (-1, entry->h_aliases);
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ve[2] = SCM_MAKINUM (entry->h_addrtype + 0L);
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ve[3] = SCM_MAKINUM (entry->h_length + 0L);
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if (sizeof (struct in_addr) != entry->h_length)
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{
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ve[4] = SCM_BOOL_F;
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return ans;
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}
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for (argv = entry->h_addr_list; argv[i]; i++);
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while (i--)
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{
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inad = *(struct in_addr *) argv[i];
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lst = scm_cons (scm_ulong2num (ntohl (inad.s_addr)), lst);
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}
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ve[4] = lst;
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return ans;
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}
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/* In all subsequent getMUMBLE functions, when we're called with no
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arguments, we're supposed to traverse the tables entry by entry.
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However, there doesn't seem to be any documented way to distinguish
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between end-of-table and an error; in both cases the functions
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return zero. Gotta love Unix. For the time being, we clear errno,
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and if we get a zero and errno is set, we signal an error. This
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doesn't seem quite right (what if errno gets set as part of healthy
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operation?), but it seems to work okay. We'll see. */
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SCM_PROC (s_getnet, "getnet", 0, 1, 0, scm_getnet);
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SCM
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scm_getnet (name)
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SCM name;
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{
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SCM ans;
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SCM *ve;
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struct netent *entry;
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ans = scm_make_vector (SCM_MAKINUM (4), SCM_UNSPECIFIED, SCM_BOOL_F);
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ve = SCM_VELTS (ans);
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if (SCM_UNBNDP (name))
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{
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SCM_DEFER_INTS;
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errno = 0;
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entry = getnetent ();
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if (! entry)
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{
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SCM_ALLOW_INTS;
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if (errno)
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scm_syserror (s_getnet);
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else
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return SCM_BOOL_F;
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}
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}
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else if (SCM_NIMP (name) && SCM_ROSTRINGP (name))
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{
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SCM_COERCE_SUBSTR (name);
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SCM_DEFER_INTS;
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entry = getnetbyname (SCM_ROCHARS (name));
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}
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else
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{
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unsigned long netnum;
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netnum = scm_num2ulong (name, (char *) SCM_ARG1, s_getnet);
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SCM_DEFER_INTS;
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entry = getnetbyaddr (netnum, AF_INET);
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}
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SCM_ALLOW_INTS;
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if (!entry)
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scm_syserror_msg (s_getnet, "no such network %s",
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scm_listify (name, SCM_UNDEFINED), errno);
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ve[0] = scm_makfromstr (entry->n_name, (scm_sizet) strlen (entry->n_name), 0);
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ve[1] = scm_makfromstrs (-1, entry->n_aliases);
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ve[2] = SCM_MAKINUM (entry->n_addrtype + 0L);
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ve[3] = scm_ulong2num (entry->n_net + 0L);
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return ans;
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}
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SCM_PROC (s_getproto, "getproto", 0, 1, 0, scm_getproto);
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SCM
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scm_getproto (name)
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SCM name;
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{
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SCM ans;
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SCM *ve;
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struct protoent *entry;
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ans = scm_make_vector (SCM_MAKINUM (3), SCM_UNSPECIFIED, SCM_BOOL_F);
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ve = SCM_VELTS (ans);
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if (SCM_UNBNDP (name))
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{
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SCM_DEFER_INTS;
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errno = 0;
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entry = getprotoent ();
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if (! entry)
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{
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SCM_ALLOW_INTS;
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if (errno)
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scm_syserror (s_getproto);
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else
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return SCM_BOOL_F;
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}
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}
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else if (SCM_NIMP (name) && SCM_ROSTRINGP (name))
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{
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SCM_COERCE_SUBSTR (name);
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SCM_DEFER_INTS;
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entry = getprotobyname (SCM_ROCHARS (name));
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}
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else
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{
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unsigned long protonum;
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protonum = scm_num2ulong (name, (char *) SCM_ARG1, s_getproto);
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SCM_DEFER_INTS;
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entry = getprotobynumber (protonum);
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}
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SCM_ALLOW_INTS;
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if (!entry)
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scm_syserror_msg (s_getproto, "no such protocol %s",
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scm_listify (name, SCM_UNDEFINED), errno);
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ve[0] = scm_makfromstr (entry->p_name, (scm_sizet) strlen (entry->p_name), 0);
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ve[1] = scm_makfromstrs (-1, entry->p_aliases);
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ve[2] = SCM_MAKINUM (entry->p_proto + 0L);
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return ans;
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}
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static SCM scm_return_entry SCM_P ((struct servent *entry));
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static SCM
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scm_return_entry (entry)
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struct servent *entry;
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{
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SCM ans;
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SCM *ve;
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ans = scm_make_vector (SCM_MAKINUM (4), SCM_UNSPECIFIED, SCM_BOOL_F);
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ve = SCM_VELTS (ans);
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ve[0] = scm_makfromstr (entry->s_name, (scm_sizet) strlen (entry->s_name), 0);
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ve[1] = scm_makfromstrs (-1, entry->s_aliases);
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ve[2] = SCM_MAKINUM (ntohs (entry->s_port) + 0L);
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ve[3] = scm_makfromstr (entry->s_proto, (scm_sizet) strlen (entry->s_proto), 0);
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SCM_ALLOW_INTS;
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return ans;
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}
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SCM_PROC (s_getserv, "getserv", 0, 2, 0, scm_getserv);
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SCM
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scm_getserv (name, proto)
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SCM name;
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SCM proto;
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{
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struct servent *entry;
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if (SCM_UNBNDP (name))
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{
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SCM_DEFER_INTS;
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errno = 0;
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entry = getservent ();
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SCM_ALLOW_INTS;
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if (!entry)
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{
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if (errno)
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scm_syserror (s_getserv);
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else
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return SCM_BOOL_F;
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}
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return scm_return_entry (entry);
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}
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SCM_ASSERT (SCM_NIMP (proto) && SCM_ROSTRINGP (proto), proto, SCM_ARG2, s_getserv);
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SCM_COERCE_SUBSTR (proto);
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if (SCM_NIMP (name) && SCM_ROSTRINGP (name))
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{
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SCM_COERCE_SUBSTR (name);
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SCM_DEFER_INTS;
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entry = getservbyname (SCM_ROCHARS (name), SCM_ROCHARS (proto));
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}
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else
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{
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SCM_ASSERT (SCM_INUMP (name), name, SCM_ARG1, s_getserv);
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SCM_DEFER_INTS;
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entry = getservbyport (htons (SCM_INUM (name)), SCM_ROCHARS (proto));
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}
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if (!entry)
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scm_syserror_msg (s_getserv, "no such service %s",
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scm_listify (name, SCM_UNDEFINED), errno);
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SCM_ALLOW_INTS;
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return scm_return_entry (entry);
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}
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SCM_PROC (s_sethost, "sethost", 0, 1, 0, scm_sethost);
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SCM
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scm_sethost (arg)
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SCM arg;
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{
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if (SCM_UNBNDP (arg))
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endhostent ();
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else
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sethostent (SCM_NFALSEP (arg));
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return SCM_UNSPECIFIED;
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}
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SCM_PROC (s_setnet, "setnet", 0, 1, 0, scm_setnet);
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SCM
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scm_setnet (arg)
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SCM arg;
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{
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if (SCM_UNBNDP (arg))
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endnetent ();
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else
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setnetent (SCM_NFALSEP (arg));
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return SCM_UNSPECIFIED;
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}
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SCM_PROC (s_setproto, "setproto", 0, 1, 0, scm_setproto);
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SCM
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scm_setproto (arg)
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SCM arg;
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{
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if (SCM_UNBNDP (arg))
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endprotoent ();
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else
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setprotoent (SCM_NFALSEP (arg));
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return SCM_UNSPECIFIED;
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}
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SCM_PROC (s_setserv, "setserv", 0, 1, 0, scm_setserv);
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SCM
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scm_setserv (arg)
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SCM arg;
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{
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if (SCM_UNBNDP (arg))
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endservent ();
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else
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setservent (SCM_NFALSEP (arg));
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return SCM_UNSPECIFIED;
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}
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void
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scm_init_net_db ()
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{
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#ifdef INADDR_ANY
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scm_sysintern ("INADDR_ANY", scm_ulong2num (INADDR_ANY));
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#endif
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#ifdef INADDR_BROADCAST
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scm_sysintern ("INADDR_BROADCAST", scm_ulong2num (INADDR_BROADCAST));
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#endif
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#ifdef INADDR_NONE
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scm_sysintern ("INADDR_NONE", scm_ulong2num (INADDR_NONE));
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#endif
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#ifdef INADDR_LOOPBACK
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scm_sysintern ("INADDR_LOOPBACK", scm_ulong2num (INADDR_LOOPBACK));
|
||
#endif
|
||
|
||
scm_add_feature ("net-db");
|
||
#include "net_db.x"
|
||
}
|