168 lines
4.5 KiB
C
168 lines
4.5 KiB
C
/***********************************************************************/
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/* */
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/* Objective Caml */
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/* */
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/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
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/* */
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/* Copyright 1996 Institut National de Recherche en Informatique et */
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/* en Automatique. All rights reserved. This file is distributed */
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/* under the terms of the GNU Library General Public License, with */
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/* the special exception on linking described in file ../../LICENSE. */
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/* */
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/***********************************************************************/
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/* $Id$ */
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#include <string.h>
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#include <mlvalues.h>
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#include <alloc.h>
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#include <memory.h>
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#include <fail.h>
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#include <signals.h>
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#include "unixsupport.h"
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#ifdef HAS_SOCKETS
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#include "socketaddr.h"
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#ifndef _WIN32
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#include <sys/types.h>
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#include <netdb.h>
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#endif
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#define NETDB_BUFFER_SIZE 10000
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#ifdef _WIN32
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#define GETHOSTBYADDR_IS_REENTRANT 1
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#define GETHOSTBYNAME_IS_REENTRANT 1
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#endif
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static int entry_h_length;
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extern int socket_domain_table[];
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static value alloc_one_addr(char const *a)
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{
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struct in_addr addr;
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memmove (&addr, a, entry_h_length);
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return alloc_inet_addr(addr.s_addr);
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}
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static value alloc_host_entry(struct hostent *entry)
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{
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value res;
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value name = Val_unit, aliases = Val_unit;
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value addr_list = Val_unit, adr = Val_unit;
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Begin_roots4 (name, aliases, addr_list, adr);
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name = copy_string((char *)(entry->h_name));
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aliases = copy_string_array((const char**)entry->h_aliases);
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entry_h_length = entry->h_length;
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#ifdef h_addr
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addr_list = alloc_array(alloc_one_addr, (const char**)entry->h_addr_list);
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#else
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adr = alloc_one_addr(entry->h_addr);
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addr_list = alloc_small(1, 0);
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Field(addr_list, 0) = adr;
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#endif
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res = alloc_small(4, 0);
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Field(res, 0) = name;
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Field(res, 1) = aliases;
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Field(res, 2) = entry->h_addrtype == PF_UNIX ? Val_int(0) : Val_int(1);
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Field(res, 3) = addr_list;
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End_roots();
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return res;
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}
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CAMLprim value unix_gethostbyaddr(value a)
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{
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uint32 adr = GET_INET_ADDR(a);
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struct hostent * hp;
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#if HAS_GETHOSTBYADDR_R == 7
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struct hostent h;
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char buffer[NETDB_BUFFER_SIZE];
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int h_errnop;
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enter_blocking_section();
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hp = gethostbyaddr_r((char *) &adr, 4, AF_INET,
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&h, buffer, sizeof(buffer), &h_errnop);
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leave_blocking_section();
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#elif HAS_GETHOSTBYADDR_R == 8
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struct hostent h;
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char buffer[NETDB_BUFFER_SIZE];
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int h_errnop, rc;
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enter_blocking_section();
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rc = gethostbyaddr_r((char *) &adr, 4, AF_INET,
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&h, buffer, sizeof(buffer), &hp, &h_errnop);
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leave_blocking_section();
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if (rc != 0) hp = NULL;
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#else
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#ifdef GETHOSTBYADDR_IS_REENTRANT
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enter_blocking_section();
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#endif
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hp = gethostbyaddr((char *) &adr, 4, AF_INET);
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#ifdef GETHOSTBYADDR_IS_REENTRANT
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leave_blocking_section();
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#endif
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#endif
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if (hp == (struct hostent *) NULL) raise_not_found();
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return alloc_host_entry(hp);
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}
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CAMLprim value unix_gethostbyname(value name)
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{
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struct hostent * hp;
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char * hostname;
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#if HAS_GETHOSTBYNAME_R || GETHOSTBYNAME_IS_REENTRANT
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hostname = stat_alloc(string_length(name) + 1);
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strcpy(hostname, String_val(name));
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#else
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hostname = String_val(name);
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#endif
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#if HAS_GETHOSTBYNAME_R == 5
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{
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struct hostent h;
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char buffer[NETDB_BUFFER_SIZE];
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int h_errno;
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enter_blocking_section();
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hp = gethostbyname_r(hostname, &h, buffer, sizeof(buffer), &h_errno);
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leave_blocking_section();
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}
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#elif HAS_GETHOSTBYNAME_R == 6
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{
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struct hostent h;
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char buffer[NETDB_BUFFER_SIZE];
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int h_errno, rc;
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enter_blocking_section();
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rc = gethostbyname_r(hostname, &h, buffer, sizeof(buffer), &hp, &h_errno);
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leave_blocking_section();
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if (rc != 0) hp = NULL;
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}
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#else
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#ifdef GETHOSTBYNAME_IS_REENTRANT
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enter_blocking_section();
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#endif
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hp = gethostbyname(hostname);
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#ifdef GETHOSTBYNAME_IS_REENTRANT
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leave_blocking_section();
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#endif
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#endif
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#if HAS_GETHOSTBYNAME_R || GETHOSTBYNAME_IS_REENTRANT
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stat_free(hostname);
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#endif
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if (hp == (struct hostent *) NULL) raise_not_found();
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return alloc_host_entry(hp);
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}
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#else
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CAMLprim value unix_gethostbyaddr(value name)
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{ invalid_argument("gethostbyaddr not implemented"); }
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CAMLprim value unix_gethostbyname(value name)
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{ invalid_argument("gethostbyname not implemented"); }
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#endif
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