305 lines
7.4 KiB
C++
305 lines
7.4 KiB
C++
/* Copyright (C) 2003, 2006 Free Software Foundation
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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#include <config.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <string.h>
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#include <errno.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#include <gcj/cni.h>
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#include <jvm.h>
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#include <java/net/VMInetAddress.h>
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#include <java/net/UnknownHostException.h>
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#if defined(HAVE_UNAME) && ! defined(HAVE_GETHOSTNAME)
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#include <sys/utsname.h>
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#endif
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#ifndef HAVE_GETHOSTNAME_DECL
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extern "C" int gethostname (char *name, int namelen);
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#endif
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jstring
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java::net::VMInetAddress::getLocalHostname ()
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{
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char *chars;
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#ifdef HAVE_GETHOSTNAME
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#ifdef MAXHOSTNAMELEN
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char buffer[MAXHOSTNAMELEN];
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if (gethostname (buffer, MAXHOSTNAMELEN))
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return NULL;
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chars = buffer;
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#else
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size_t size = 256;
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while (1) {
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char buffer[size];
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if (!gethostname (buffer, size-1))
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{
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buffer[size-1] = 0;
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return JvNewStringUTF (buffer);
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}
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else if (errno != ENAMETOOLONG)
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return NULL;
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size *= 2;
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}
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#endif
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#elif HAVE_UNAME
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struct utsname stuff;
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if (uname (&stuff) != 0)
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return NULL;
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chars = stuff.nodename;
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#else
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return NULL;
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#endif
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// It is admittedly non-optimal to convert the hostname to Unicode
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// only to convert it back in getByName, but simplicity wins.
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return JvNewStringUTF (chars);
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}
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jbyteArray
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java::net::VMInetAddress::lookupInaddrAny ()
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{
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#if ! HAVE_IN_ADDR_T
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typedef jint in_addr_t;
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#endif
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in_addr_t laddr = INADDR_ANY;
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char *bytes = (char *) &laddr;
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int blen = sizeof (laddr);
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jbyteArray result = JvNewByteArray (blen);
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memcpy (elements (result), bytes, blen);
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return result;
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}
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jstring
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java::net::VMInetAddress::getHostByAddr (jbyteArray addr)
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{
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struct hostent *hptr = NULL;
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#ifdef HAVE_GETHOSTBYADDR_R
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struct hostent hent_r;
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#if HAVE_STRUCT_HOSTENT_DATA
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struct hostent_data fixed_buffer, *buffer_r = &fixed_buffer;
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#else
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#ifdef __GLIBC__
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// FIXME: in glibc, gethostbyname_r returns NETDB_INTERNAL to herr and
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// ERANGE to errno if the buffer size is too small, rather than what is
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// expected here. We work around this by setting a bigger buffer size and
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// hoping that it is big enough.
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char fixed_buffer[1024];
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#else
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char fixed_buffer[200];
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#endif /* __GLIBC__ */
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char *buffer_r = fixed_buffer;
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int size_r = sizeof (fixed_buffer);
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#endif /* HAVE_STRUCT_HOSTENT_DATA */
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#endif /* HAVE_GETHOSTBYADDR_R */
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char *bytes = (char*) elements (addr);
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int len = addr->length;
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int type;
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char *val;
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if (len == 4)
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{
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val = bytes;
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type = AF_INET;
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}
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#ifdef HAVE_INET6
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else if (len == 16)
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{
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val = (char *) &bytes;
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type = AF_INET6;
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}
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#endif /* HAVE_INET6 */
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else
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JvFail ("unrecognized size");
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#ifdef HAVE_GETHOSTBYADDR_R
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while (true)
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{
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int ok;
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#if HAVE_STRUCT_HOSTENT_DATA
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ok = ! gethostbyaddr_r (val, len, type, &hent_r, buffer_r);
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#else
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int herr = 0;
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#ifdef GETHOSTBYADDR_R_RETURNS_INT
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ok = ! gethostbyaddr_r (val, len, type, &hent_r,
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buffer_r, size_r, &hptr, &herr);
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#else
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hptr = gethostbyaddr_r (val, len, type, &hent_r,
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buffer_r, size_r, &herr);
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ok = hptr != NULL;
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#endif /* GETHOSTBYADDR_R_RETURNS_INT */
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if (! ok && herr == ERANGE)
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{
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size_r *= 2;
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buffer_r = (char *) _Jv_AllocBytes (size_r);
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}
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else
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#endif /* HAVE_STRUCT_HOSTENT_DATA */
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break;
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}
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#else /* HAVE_GETHOSTBYADDR_R */
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// FIXME: this is insufficient if some other piece of code calls
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// this gethostbyaddr.
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JvSynchronize sync (&java::net::VMInetAddress::class$);
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hptr = gethostbyaddr (val, len, type);
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#endif /* HAVE_GETHOSTBYADDR_R */
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if (hptr == NULL)
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throw new java::net::UnknownHostException ();
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return JvNewStringUTF (hptr->h_name);
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}
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JArray<jbyteArray> *
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java::net::VMInetAddress::getHostByName (jstring host)
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{
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struct hostent *hptr = NULL;
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#ifdef HAVE_GETHOSTBYNAME_R
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struct hostent hent_r;
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#if HAVE_STRUCT_HOSTENT_DATA
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struct hostent_data fixed_buffer, *buffer_r = &fixed_buffer;
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#else
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#ifdef __GLIBC__
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// FIXME: in glibc, gethostbyname_r returns NETDB_INTERNAL to herr and
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// ERANGE to errno if the buffer size is too small, rather than what is
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// expected here. We work around this by setting a bigger buffer size and
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// hoping that it is big enough.
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char fixed_buffer[1024];
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#else
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char fixed_buffer[200];
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#endif /* __GLIBC__ */
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char *buffer_r = fixed_buffer;
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int size_r = sizeof (fixed_buffer);
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#endif /* HAVE_STRUCT_HOSTENT_DATA */
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#endif /* HAVE_GETHOSTBYNAME_R */
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char *hostname;
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char buf[100];
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int len = JvGetStringUTFLength(host);
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if (len < 100)
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hostname = buf;
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else
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hostname = (char *) _Jv_AllocBytes (len + 1);
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JvGetStringUTFRegion (host, 0, host->length(), hostname);
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buf[len] = '\0';
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#ifdef HAVE_GETHOSTBYNAME_R
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while (true)
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{
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int ok;
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#if HAVE_STRUCT_HOSTENT_DATA
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ok = ! gethostbyname_r (hostname, &hent_r, buffer_r);
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#else
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int herr = 0;
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#ifdef GETHOSTBYNAME_R_RETURNS_INT
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ok = ! gethostbyname_r (hostname, &hent_r, buffer_r, size_r,
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&hptr, &herr);
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#else
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hptr = gethostbyname_r (hostname, &hent_r, buffer_r, size_r, &herr);
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ok = hptr != NULL;
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#endif /* GETHOSTNAME_R_RETURNS_INT */
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if (! ok && herr == ERANGE)
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{
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size_r *= 2;
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buffer_r = (char *) _Jv_AllocBytes (size_r);
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}
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else
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#endif /* HAVE_STRUCT_HOSTENT_DATA */
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break;
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}
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#else /* HAVE_GETHOSTBYNAME_R */
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// FIXME: this is insufficient if some other piece of code calls
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// this gethostbyname.
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JvSynchronize sync (&java::net::VMInetAddress::class$);
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hptr = gethostbyname (hostname);
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#endif /* HAVE_GETHOSTBYNAME_R */
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if (hptr == NULL)
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throw new java::net::UnknownHostException (host);
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int count = 0;
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char ** ptr = hptr->h_addr_list;
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while (*ptr++) count++;
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JArray<jbyteArray> *result =
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(JArray<jbyteArray> *) _Jv_NewObjectArray (
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count, _Jv_GetArrayClass(JvPrimClass(byte), NULL), NULL);
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jbyteArray* addrs = elements (result);
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for (int i = 0; i < count; i++)
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{
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addrs[i] = JvNewByteArray (hptr->h_length);
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memcpy (elements (addrs[i]), hptr->h_addr_list[i], hptr->h_length);
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}
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return result;
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}
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jbyteArray
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java::net::VMInetAddress::aton (jstring host)
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{
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char *hostname;
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char buf[100];
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int len = JvGetStringUTFLength(host);
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if (len < 100)
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hostname = buf;
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else
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hostname = (char *) _Jv_AllocBytes (len+1);
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JvGetStringUTFRegion (host, 0, host->length(), hostname);
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buf[len] = '\0';
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char *bytes = NULL;
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int blen = 0;
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#ifdef HAVE_INET_ATON
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struct in_addr laddr;
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if (inet_aton (hostname, &laddr))
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{
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bytes = (char *) &laddr;
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blen = 4;
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}
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#elif defined(HAVE_INET_ADDR)
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#if ! HAVE_IN_ADDR_T
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typedef jint in_addr_t;
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#endif
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in_addr_t laddr = inet_addr (hostname);
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if (laddr != (in_addr_t)(-1))
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{
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bytes = (char *) &laddr;
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blen = 4;
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}
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#endif
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#if defined (HAVE_INET_PTON) && defined (HAVE_INET6)
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char inet6_addr[16];
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if (len != 0 && inet_pton (AF_INET6, hostname, inet6_addr) > 0)
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{
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bytes = inet6_addr;
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blen = 16;
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}
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#endif
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if (blen == 0)
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return NULL;
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jbyteArray result = JvNewByteArray (blen);
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memcpy (elements (result), bytes, blen);
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return result;
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}
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