source: rtems/cpukit/librpc/src/rpc/get_myaddress.c @ 57cfaad

4.104.114.84.95
Last change on this file since 57cfaad was 57cfaad, checked in by Joel Sherrill <joel.sherrill@…>, on Oct 31, 2000 at 4:39:06 PM

2000-10-30 Joel Sherrill <joel@…>

  • POSIX include files merged into newlib. This resulted in some definitions moving to other files and thus some secondary effects in RTEMS source code.
  • src/rpc/Makefile.am, src/rpc/auth_time.c, src/rpc/clnt_simple.c, src/rpc/clnt_tcp.c, src/rpc/clnt_udp.c, src/rpc/clnt_unix.c, src/rpc/get_myaddress.c, src/rpc/pmap_clnt.c, src/rpc/pmap_getmaps.c, src/rpc/pmap_getport.c, src/rpc/pmap_rmt.c, src/rpc/rtime.c, src/rpc/svc_tcp.c, src/rpc/svc_udp.c, src/rpc/svc_unix.c: Use of _read, _write, and _close as macros conflicted with newlib's use of these as routine names. They were renamed to include "_RPC_" prefix.
  • Property mode set to 100644
File size: 3.3 KB
Line 
1/*
2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part.  Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user.
8 *
9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
12 *
13 * Sun RPC is provided with no support and without any obligation on the
14 * part of Sun Microsystems, Inc. to assist in its use, correction,
15 * modification or enhancement.
16 *
17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19 * OR ANY PART THEREOF.
20 *
21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22 * or profits or other special, indirect and consequential damages, even if
23 * Sun has been advised of the possibility of such damages.
24 *
25 * Sun Microsystems, Inc.
26 * 2550 Garcia Avenue
27 * Mountain View, California  94043
28 */
29
30#if defined(LIBC_SCCS) && !defined(lint)
31/*static char *sccsid = "from: @(#)get_myaddress.c 1.4 87/08/11 Copyr 1984 Sun Micro";*/
32/*static char *sccsid = "from: @(#)get_myaddress.c      2.1 88/07/29 4.0 RPCSRC";*/
33static char *rcsid = "$FreeBSD: src/lib/libc/rpc/get_myaddress.c,v 1.17 2000/01/27 23:06:37 jasone Exp $";
34#endif
35
36/*
37 * get_myaddress.c
38 *
39 * Get client's IP address via ioctl.  This avoids using the yellowpages.
40 * Copyright (C) 1984, Sun Microsystems, Inc.
41 */
42
43#include <rpc/types.h>
44#include <rpc/xdr.h>
45#include <rpc/pmap_prot.h>
46#include <sys/socket.h>
47#include <stdio.h>
48#include <unistd.h>
49#include <net/if.h>
50#include <sys/ioctl.h>
51#include <netinet/in.h>
52#include <arpa/inet.h>
53
54/*
55 * don't use gethostbyname, which would invoke yellow pages
56 *
57 * Avoid loopback interfaces.  We return information from a loopback
58 * interface only if there are no other possible interfaces.
59 */
60int
61get_myaddress(addr)
62        struct sockaddr_in *addr;
63{
64        int s;
65        char buf[BUFSIZ];
66        struct ifconf ifc;
67        struct ifreq ifreq, *ifr, *end;
68        int loopback = 0, gotit = 0;
69
70        if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
71                return(-1);
72        }
73        ifc.ifc_len = sizeof (buf);
74        ifc.ifc_buf = buf;
75        if (ioctl(s, SIOCGIFCONF, (char *)&ifc) < 0) {
76                _RPC_close(s);
77                return(-1);
78        }
79again:
80        ifr = ifc.ifc_req;
81        end = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
82
83        while (ifr < end) {
84                ifreq = *ifr;
85                if (ioctl(s, SIOCGIFFLAGS, (char *)&ifreq) < 0) {
86                        _RPC_close(s);
87                        return(-1);
88                }
89                if (((ifreq.ifr_flags & IFF_UP) &&
90                    ifr->ifr_addr.sa_family == AF_INET &&
91                        !(ifreq.ifr_flags & IFF_LOOPBACK)) ||
92                    (loopback == 1 && (ifreq.ifr_flags & IFF_LOOPBACK)
93                        && (ifr->ifr_addr.sa_family == AF_INET)
94                        && (ifreq.ifr_flags &  IFF_UP))) {
95                        *addr = *((struct sockaddr_in *)&ifr->ifr_addr);
96                        addr->sin_port = htons(PMAPPORT);
97                        gotit = 1;
98                        break;
99                }
100                if (ifr->ifr_addr.sa_len)
101                        ifr = (struct ifreq *) ((caddr_t) ifr +
102                              ifr->ifr_addr.sa_len -
103                              sizeof(struct sockaddr));
104                ifr++;
105        }
106        if (gotit == 0 && loopback == 0) {
107                loopback = 1;
108                goto again;
109        }
110        (void)_RPC_close(s);
111        return (gotit ? 0 : -1);
112}
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