130 lines
3.6 KiB
C
130 lines
3.6 KiB
C
/*
|
|
* 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);
|
|
}
|