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/*
* Copyright (C) 2008 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#include <sys/types.h>
#include <endian.h>
#include <netdb.h>
#include "servent.h"
#include "services.h"
void
setservent(int f)
{
res_static rs = __res_get_static();
if (rs) {
rs->servent_ptr = NULL;
}
}
void
endservent(void)
{
/* nothing to do */
}
struct servent *
getservent_r( res_static rs )
{
const char* p;
const char* q;
int namelen;
int nn,count;
int total = 0;
int port;
char* p2;
p = rs->servent_ptr;
if (p == NULL)
p = _services;
else if (p[0] == 0)
return NULL;
/* first compute the total size */
namelen = p[0];
total += namelen + 1;
q = p + 1 + namelen + 3; /* skip name + port + proto */
count = q[0]; /* get aliascount */
q += 1;
total += (count+1)*sizeof(char*);
for (nn = 0; nn < count; nn++) {
int len2 = q[0];
total += 1 + len2;
q += 1 + len2;
}
/* reallocate the thread-specific servent struct */
p2 = realloc( (char*)rs->servent.s_aliases, total );
if (p2 == NULL)
return NULL;
/* now write to it */
rs->servent.s_aliases = (char**) p2;
p2 += (count+1)*sizeof(char*);
rs->servent.s_name = p2;
p2 += namelen + 1;
rs->servent.s_proto = p2;
/* copy name + port + setup protocol */
memcpy( rs->servent.s_name, p+1, namelen );
rs->servent.s_name[namelen] = 0;
p += 1 + namelen;
/* s_port must be in network byte order */
port = ((((unsigned char*)p)[0] << 8) |
((unsigned char*)p)[1]);
rs->servent.s_port = htons(port);
rs->servent.s_proto = p[2] == 't' ? "tcp" : "udp";
p += 4; /* skip port(2) + proto(1) + aliascount(1) */
for (nn = 0; nn < count; nn++) {
int len2 = p[0];
rs->servent.s_aliases[nn] = p2;
memcpy( p2, p+1, len2 );
p2[len2] = 0;
p2 += len2 + 1;
p += len2 + 1;
}
rs->servent.s_aliases[nn] = NULL;
rs->servent_ptr = p;
return &rs->servent;
}
struct servent *
getservent(void)
{
res_static rs = __res_get_static();
if (rs == NULL) return NULL;
return getservent_r(rs);
}
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