mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
/*
|
|
* get_myaddress.c
|
|
*
|
|
* Get client's IP address via ioctl. This avoids using the yellowpages.
|
|
* Copyright (c) 2010, Oracle America, Inc.
|
|
*
|
|
* 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.
|
|
* * Neither the name of the "Oracle America, Inc." nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* 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 HOLDER 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 <rpc/types.h>
|
|
#include <rpc/clnt.h>
|
|
#include <rpc/pmap_prot.h>
|
|
#include <sys/socket.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <libintl.h>
|
|
#include <net/if.h>
|
|
#include <ifaddrs.h>
|
|
#include <sys/ioctl.h>
|
|
/* Order of following two #includes reversed by roland@gnu */
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
|
|
/*
|
|
* don't use gethostbyname, which would invoke yellow pages
|
|
*
|
|
* Avoid loopback interfaces. We return information from a loopback
|
|
* interface only if there are no other possible interfaces.
|
|
*/
|
|
void
|
|
get_myaddress (struct sockaddr_in *addr)
|
|
{
|
|
struct ifaddrs *ifa;
|
|
|
|
if (getifaddrs (&ifa) != 0)
|
|
{
|
|
perror ("get_myaddress: getifaddrs");
|
|
exit (1);
|
|
}
|
|
|
|
int loopback = 0;
|
|
struct ifaddrs *run;
|
|
|
|
again:
|
|
run = ifa;
|
|
while (run != NULL)
|
|
{
|
|
if ((run->ifa_flags & IFF_UP)
|
|
&& run->ifa_addr != NULL
|
|
&& run->ifa_addr->sa_family == AF_INET
|
|
&& (!(run->ifa_flags & IFF_LOOPBACK)
|
|
|| (loopback == 1 && (run->ifa_flags & IFF_LOOPBACK))))
|
|
{
|
|
*addr = *((struct sockaddr_in *) run->ifa_addr);
|
|
addr->sin_port = htons (PMAPPORT);
|
|
goto out;
|
|
}
|
|
|
|
run = run->ifa_next;
|
|
}
|
|
|
|
if (loopback == 0)
|
|
{
|
|
loopback = 1;
|
|
goto again;
|
|
}
|
|
out:
|
|
freeifaddrs (ifa);
|
|
|
|
/* The function is horribly specified. It does not return any error
|
|
if no interface is up. Probably this won't happen (at least
|
|
loopback is there) but still... */
|
|
}
|
|
#ifdef EXPORT_RPC_SYMBOLS
|
|
libc_hidden_def (get_myaddress)
|
|
#else
|
|
libc_hidden_nolink (get_myaddress, GLIBC_2_0)
|
|
#endif
|