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Diffstat (limited to 'libc/inet/rpc/get_myaddress.c')
-rw-r--r--libc/inet/rpc/get_myaddress.c108
1 files changed, 108 insertions, 0 deletions
diff --git a/libc/inet/rpc/get_myaddress.c b/libc/inet/rpc/get_myaddress.c
new file mode 100644
index 000000000..44a6eb38c
--- /dev/null
+++ b/libc/inet/rpc/get_myaddress.c
@@ -0,0 +1,108 @@
+/* @(#)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
+ * media and as a part of the software program in whole or part. Users
+ * 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
+ */
+#if !defined(lint) && defined(SCCSIDS)
+static char sccsid[] = "@(#)get_myaddress.c 1.4 87/08/11 Copyr 1984 Sun Micro";
+#endif
+
+/*
+ * get_myaddress.c
+ *
+ * Get client's IP address via ioctl. This avoids using the yellowpages.
+ * Copyright (C) 1984, Sun Microsystems, Inc.
+ */
+
+#include <rpc/types.h>
+#include <rpc/pmap_prot.h>
+#include <sys/socket.h>
+#include <stdio.h>
+#include <net/if.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+
+#ifdef linux
+/* DO use gethostbyname because it's portable */
+#include <netdb.h>
+get_myaddress(addr)
+ struct sockaddr_in *addr;
+{
+ char localhost[256 + 1];
+ struct hostent *hp;
+
+ 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
+ */
+get_myaddress(addr)
+ struct sockaddr_in *addr;
+{
+ int s;
+ char buf[BUFSIZ];
+ struct ifconf ifc;
+ struct ifreq ifreq, *ifr;
+ int len;
+
+ 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);
+ }
+ 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++;
+ }
+ (void) close(s);
+}
+#endif