summaryrefslogtreecommitdiff
path: root/nslookup.c
diff options
context:
space:
mode:
Diffstat (limited to 'nslookup.c')
-rw-r--r--nslookup.c183
1 files changed, 0 insertions, 183 deletions
diff --git a/nslookup.c b/nslookup.c
deleted file mode 100644
index 3e32ca9..0000000
--- a/nslookup.c
+++ /dev/null
@@ -1,183 +0,0 @@
-/* vi: set sw=4 ts=4: */
-/*
- * Mini nslookup implementation for busybox
- *
- * Copyright (C) 1999,2000,2001 by Lineo, inc.
- * Written by John Beppu <beppu@lineo.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-
-#include <ctype.h>
-#include <errno.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-
-#include <netdb.h>
-#include <sys/socket.h>
-#include <sys/types.h>
-#include <netinet/in.h>
-#include <resolv.h>
-#include <arpa/inet.h>
-#include "busybox.h"
-
-/*
- | I'm only implementing non-interactive mode;
- | I totally forgot nslookup even had an interactive mode.
- |
- | [ TODO ]
- | + find out how to use non-default name servers
- */
-
-/* only works for IPv4 */
-static int addr_fprint(char *addr)
-{
- u_int8_t split[4];
- u_int32_t ip;
- u_int32_t *x = (u_int32_t *) addr;
-
- ip = ntohl(*x);
- split[0] = (ip & 0xff000000) >> 24;
- split[1] = (ip & 0x00ff0000) >> 16;
- split[2] = (ip & 0x0000ff00) >> 8;
- split[3] = (ip & 0x000000ff);
- printf("%d.%d.%d.%d", split[0], split[1], split[2], split[3]);
- return 0;
-}
-
-/* takes the NULL-terminated array h_addr_list, and
- * prints its contents appropriately
- */
-static int addr_list_fprint(char **h_addr_list)
-{
- int i, j;
- char *addr_string = (h_addr_list[1])
- ? "Addresses: " : "Address: ";
-
- printf("%s ", addr_string);
- for (i = 0, j = 0; h_addr_list[i]; i++, j++) {
- addr_fprint(h_addr_list[i]);
-
- /* real nslookup does this */
- if (j == 4) {
- if (h_addr_list[i + 1]) {
- printf("\n ");
- }
- j = 0;
- } else {
- if (h_addr_list[i + 1]) {
- printf(", ");
- }
- }
-
- }
- printf("\n");
- return 0;
-}
-
-/* print the results as nslookup would */
-static struct hostent *hostent_fprint(struct hostent *host)
-{
- if (host) {
- printf("Name: %s\n", host->h_name);
- addr_list_fprint(host->h_addr_list);
- } else {
- printf("*** Unknown host\n");
- }
- return host;
-}
-
-/* changes a c-string matching the perl regex \d+\.\d+\.\d+\.\d+
- * into a u_int32_t
- */
-static u_int32_t str_to_addr(const char *addr)
-{
- u_int32_t split[4];
- u_int32_t ip;
-
- sscanf(addr, "%d.%d.%d.%d",
- &split[0], &split[1], &split[2], &split[3]);
-
- /* assuming sscanf worked */
- ip = (split[0] << 24) |
- (split[1] << 16) | (split[2] << 8) | (split[3]);
-
- return htonl(ip);
-}
-
-/* gethostbyaddr wrapper */
-static struct hostent *gethostbyaddr_wrapper(const char *address)
-{
- struct in_addr addr;
-
- addr.s_addr = str_to_addr(address);
- return gethostbyaddr((char *) &addr, 4, AF_INET); /* IPv4 only for now */
-}
-
-#ifdef __UCLIBC__
-#warning FIXME after fixing uClibc to define struct _res
-static inline void server_print(void)
-{
- printf("Server: %s\n", "default");
- printf("Address: %s\n\n", "default");
-}
-#else
-/* lookup the default nameserver and display it */
-static inline void server_print(void)
-{
- struct sockaddr_in def = _res.nsaddr_list[0];
- char *ip = inet_ntoa(def.sin_addr);
-
- hostent_fprint(gethostbyaddr_wrapper(ip));
- printf("\n");
-}
-#endif
-
-/* naive function to check whether char *s is an ip address */
-static int is_ip_address(const char *s)
-{
- while (*s) {
- if ((isdigit(*s)) || (*s == '.')) {
- s++;
- continue;
- }
- return 0;
- }
- return 1;
-}
-
-/* ________________________________________________________________________ */
-int nslookup_main(int argc, char **argv)
-{
- struct hostent *host;
-
- if (argc < 2 || *argv[1]=='-') {
- show_usage();
- }
-
- res_init();
- server_print();
- if (is_ip_address(argv[1])) {
- host = gethostbyaddr_wrapper(argv[1]);
- } else {
- host = xgethostbyname(argv[1]);
- }
- hostent_fprint(host);
- return EXIT_SUCCESS;
-}
-
-/* $Id: nslookup.c,v 1.25 2001/10/01 17:50:25 kraai Exp $ */