diff options
Diffstat (limited to 'libc/inet/rpc/get_myaddress.c')
| -rw-r--r-- | libc/inet/rpc/get_myaddress.c | 127 |
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 |