diff options
Diffstat (limited to 'libc/inet/rpc/get_myaddress.c')
| -rw-r--r-- | libc/inet/rpc/get_myaddress.c | 108 |
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 |