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Diffstat (limited to 'dev-util/guile/files/net_db.c')
| -rw-r--r-- | dev-util/guile/files/net_db.c | 580 |
1 files changed, 580 insertions, 0 deletions
diff --git a/dev-util/guile/files/net_db.c b/dev-util/guile/files/net_db.c new file mode 100644 index 000000000000..58e8dd5aeb8f --- /dev/null +++ b/dev-util/guile/files/net_db.c @@ -0,0 +1,580 @@ +/* "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. + */ + + +#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 + + + +#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: +*/ |