summaryrefslogtreecommitdiff
path: root/libc/inet/rpc/get_myaddress.c
diff options
context:
space:
mode:
authorEric Andersen <andersen@codepoet.org>2002-06-17 21:12:16 +0000
committerEric Andersen <andersen@codepoet.org>2002-06-17 21:12:16 +0000
commitcdb3c81f36283df4b53f24a374d78c695e9d8b06 (patch)
tree9494bff7c98929e44c41dcdde32dc3fc6faf4330 /libc/inet/rpc/get_myaddress.c
parent6ba832b158c91c6b35e1832220b3fc5ebf76333f (diff)
Re-backport all the rpc stuff from glibc 2.2.5. This allows us to make this
junk (and I do mean that ;-) thread safe without undue pain. Adds 12k worth to the code size I'm afraid, but since I never use NFS and therefore never include this stuff, I guess thats acceptable. I still need to enable the multi-threaded bits... -Erik
Diffstat (limited to 'libc/inet/rpc/get_myaddress.c')
-rw-r--r--libc/inet/rpc/get_myaddress.c127
1 files changed, 63 insertions, 64 deletions
diff --git a/libc/inet/rpc/get_myaddress.c b/libc/inet/rpc/get_myaddress.c
index 1b80207f5..86277d239 100644
--- a/libc/inet/rpc/get_myaddress.c
+++ b/libc/inet/rpc/get_myaddress.c
@@ -1,4 +1,4 @@
-/* @(#)get_myaddress.c 2.1 88/07/29 4.0 RPCSRC */
+/* @(#)get_myaddress.c 2.1 88/07/29 4.0 RPCSRC */
/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
@@ -6,29 +6,30 @@
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user.
- *
+ *
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
- *
+ *
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
- *
+ *
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
- *
+ *
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
- *
+ *
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
-#define __FORCE_GLIBC
-#include <features.h>
+#if !defined(lint) && defined(SCCSIDS)
+static char sccsid[] = "@(#)get_myaddress.c 1.4 87/08/11 Copyr 1984 Sun Micro";
+#endif
/*
* get_myaddress.c
@@ -38,72 +39,70 @@
*/
#include <rpc/types.h>
+#include <rpc/clnt.h>
#include <rpc/pmap_prot.h>
#include <sys/socket.h>
#include <stdio.h>
-//#include <net/if.h>
+#include <unistd.h>
+#include <net/if.h>
#include <sys/ioctl.h>
-#include <arpa/inet.h>
+/* Order of following two #includes reversed by roland@gnu */
#include <netinet/in.h>
-#include <rpc/clnt.h>
-#include <unistd.h>
-
-#ifdef __linux__
-/* DO use gethostbyname because it's portable */
-#include <netdb.h>
-void get_myaddress(addr)
-struct sockaddr_in *addr;
-{
- char localhost[256 + 1];
- struct hostent *hp;
+#include <arpa/inet.h>
- gethostname(localhost, 256);
- if ((hp = gethostbyname(localhost)) == NULL) {
- perror("get_myaddress: gethostbyname");
- exit(1);
- }
- addr->sin_family = AF_INET;
- bcopy((char *) hp->h_addr, (char *) &addr->sin_addr, hp->h_length);
- addr->sin_port = htons(PMAPPORT);
-}
-#else
-/*
+/*
* 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(addr)
-struct sockaddr_in *addr;
+void
+get_myaddress (struct sockaddr_in *addr)
{
- int s;
- char buf[BUFSIZ];
- struct ifconf ifc;
- struct ifreq ifreq, *ifr;
- int len;
+ int s;
+ char buf[BUFSIZ];
+ struct ifconf ifc;
+ struct ifreq ifreq, *ifr;
+ int len, loopback = 0;
- if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
- perror("get_myaddress: socket");
- exit(1);
- }
- ifc.ifc_len = sizeof(buf);
- ifc.ifc_buf = buf;
- if (ioctl(s, SIOCGIFCONF, (char *) &ifc) < 0) {
- perror("get_myaddress: ioctl (get interface configuration)");
- exit(1);
+ if ((s = socket (AF_INET, SOCK_DGRAM, 0)) < 0)
+ {
+ perror ("get_myaddress: socket");
+ exit (1);
+ }
+ ifc.ifc_len = sizeof (buf);
+ ifc.ifc_buf = buf;
+ if (ioctl (s, SIOCGIFCONF, (char *) &ifc) < 0)
+ {
+ perror (_("get_myaddress: ioctl (get interface configuration)"));
+ exit (1);
+ }
+
+ again:
+ ifr = ifc.ifc_req;
+ for (len = ifc.ifc_len; len; len -= sizeof ifreq)
+ {
+ ifreq = *ifr;
+ if (ioctl (s, SIOCGIFFLAGS, (char *) &ifreq) < 0)
+ {
+ perror ("get_myaddress: ioctl");
+ exit (1);
}
- ifr = ifc.ifc_req;
- for (len = ifc.ifc_len; len; len -= sizeof ifreq) {
- ifreq = *ifr;
- if (ioctl(s, SIOCGIFFLAGS, (char *) &ifreq) < 0) {
- perror("get_myaddress: ioctl");
- exit(1);
- }
- if ((ifreq.ifr_flags & IFF_UP) &&
- ifr->ifr_addr.sa_family == AF_INET) {
- *addr = *((struct sockaddr_in *) &ifr->ifr_addr);
- addr->sin_port = htons(PMAPPORT);
- break;
- }
- ifr++;
+ if ((ifreq.ifr_flags & IFF_UP) && (ifr->ifr_addr.sa_family == AF_INET)
+ && (!(ifreq.ifr_flags & IFF_LOOPBACK) ||
+ (loopback == 1 && (ifreq.ifr_flags & IFF_LOOPBACK))))
+ {
+ *addr = *((struct sockaddr_in *) &ifr->ifr_addr);
+ addr->sin_port = htons (PMAPPORT);
+ close (s);
+ return;
}
- (void) close(s);
+ ifr++;
+ }
+ if (loopback == 0)
+ {
+ loopback = 1;
+ goto again;
+ }
+ close (s);
}
-#endif