projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 44ea5b98 WJ |
1 | /* @(#)get_myaddress.c 2.1 88/07/29 4.0 RPCSRC */ |
| 2 | /* | |
| 3 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for | |
| 4 | * unrestricted use provided that this legend is included on all tape | |
| 5 | * media and as a part of the software program in whole or part. Users | |
| 6 | * may copy or modify Sun RPC without charge, but are not authorized | |
| 7 | * to license or distribute it to anyone else except as part of a product or | |
| 8 | * program developed by the user. | |
| 9 | * | |
| 10 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE | |
| 11 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR | |
| 12 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. | |
| 13 | * | |
| 14 | * Sun RPC is provided with no support and without any obligation on the | |
| 15 | * part of Sun Microsystems, Inc. to assist in its use, correction, | |
| 16 | * modification or enhancement. | |
| 17 | * | |
| 18 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE | |
| 19 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC | |
| 20 | * OR ANY PART THEREOF. | |
| 21 | * | |
| 22 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue | |
| 23 | * or profits or other special, indirect and consequential damages, even if | |
| 24 | * Sun has been advised of the possibility of such damages. | |
| 25 | * | |
| 26 | * Sun Microsystems, Inc. | |
| 27 | * 2550 Garcia Avenue | |
| 28 | * Mountain View, California 94043 | |
| 29 | */ | |
| 30 | #if !defined(lint) && defined(SCCSIDS) | |
| 31 | static char sccsid[] = "@(#)get_myaddress.c 1.4 87/08/11 Copyr 1984 Sun Micro"; | |
| 32 | #endif | |
| 33 | ||
| 34 | /* | |
| 35 | * get_myaddress.c | |
| 36 | * | |
| 37 | * Get client's IP address via ioctl. This avoids using the yellowpages. | |
| 38 | * Copyright (C) 1984, Sun Microsystems, Inc. | |
| 39 | */ | |
| 40 | ||
| 41 | #include <rpc/types.h> | |
| 42 | #include <rpc/pmap_prot.h> | |
| 43 | #include <sys/socket.h> | |
| 44 | #include <stdio.h> | |
| 45 | #include <net/if.h> | |
| 46 | #include <sys/ioctl.h> | |
| 47 | #include <netinet/in.h> | |
| 48 | #include <arpa/inet.h> | |
| 49 | ||
| 50 | /* | |
| 51 | * don't use gethostbyname, which would invoke yellow pages | |
| 52 | */ | |
| 53 | get_myaddress(addr) | |
| 54 | struct sockaddr_in *addr; | |
| 55 | { | |
| 56 | int s; | |
| 57 | char buf[BUFSIZ]; | |
| 58 | struct ifconf ifc; | |
| 59 | struct ifreq ifreq, *ifr; | |
| 60 | int len, slop; | |
| 61 | ||
| 62 | if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { | |
| 63 | perror("get_myaddress: socket"); | |
| 64 | exit(1); | |
| 65 | } | |
| 66 | ifc.ifc_len = sizeof (buf); | |
| 67 | ifc.ifc_buf = buf; | |
| 68 | if (ioctl(s, SIOCGIFCONF, (char *)&ifc) < 0) { | |
| 69 | perror("get_myaddress: ioctl (get interface configuration)"); | |
| 70 | exit(1); | |
| 71 | } | |
| 72 | ifr = ifc.ifc_req; | |
| 73 | for (len = ifc.ifc_len; len; len -= sizeof ifreq) { | |
| 74 | ifreq = *ifr; | |
| 75 | if (ioctl(s, SIOCGIFFLAGS, (char *)&ifreq) < 0) { | |
| 76 | perror("get_myaddress: ioctl"); | |
| 77 | exit(1); | |
| 78 | } | |
| 79 | if ((ifreq.ifr_flags & IFF_UP) && | |
| 80 | ifr->ifr_addr.sa_family == AF_INET) { | |
| 81 | *addr = *((struct sockaddr_in *)&ifr->ifr_addr); | |
| 82 | addr->sin_port = htons(PMAPPORT); | |
| 83 | break; | |
| 84 | } | |
| 85 | /* | |
| 86 | * Deal with variable length addresses | |
| 87 | */ | |
| 88 | slop = ifr->ifr_addr.sa_len - sizeof (struct sockaddr); | |
| 89 | if (slop) { | |
| 90 | ifr = (struct ifreq *) ((caddr_t)ifr + slop); | |
| 91 | len -= slop; | |
| 92 | } | |
| 93 | ifr++; | |
| 94 | } | |
| 95 | (void) close(s); | |
| 96 | } |