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nslookup -- a work in progress...
This commit is contained in:
John Beppu
parent
04e97024e7
commit
b332e779e6
@ -173,6 +173,9 @@ static const struct Applet applets[] = {
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#ifdef BB_MV //bin
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{"mv", mv_main},
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#endif
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#ifdef BB_NSLOOKUP //bin
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{"nslookup", nslookup_main},
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#endif
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#ifdef BB_PING //bin
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{"ping", ping_main},
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#endif
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@ -173,6 +173,9 @@ static const struct Applet applets[] = {
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#ifdef BB_MV //bin
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{"mv", mv_main},
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#endif
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#ifdef BB_NSLOOKUP //bin
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{"nslookup", nslookup_main},
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#endif
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#ifdef BB_PING //bin
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{"ping", ping_main},
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#endif
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@ -60,6 +60,7 @@
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//#define BB_MT
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//#define BB_MTAB
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#define BB_MV
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#define BB_NSLOOKUP
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#define BB_PING
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#define BB_POWEROFF
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//#define BB_PRINTF
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@ -106,6 +106,7 @@ extern int more_main(int argc, char** argv);
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extern int mount_main(int argc, char** argv);
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extern int mt_main(int argc, char** argv);
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extern int mv_main(int argc, char** argv);
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extern int nslookup_main(int argc, char** argv);
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extern int ping_main(int argc, char **argv);
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extern int poweroff_main(int argc, char **argv);
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extern int printf_main(int argc, char** argv);
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168
networking/nslookup.c
Normal file
168
networking/nslookup.c
Normal file
@ -0,0 +1,168 @@
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/*
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* Mini nslookup implementation for busybox
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*
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*
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* Copyright (C) 2000 by Lineo, inc.
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* Written by John Beppu <beppu@lineo.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "internal.h"
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#include <ctype.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <netdb.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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static const char nslookup_usage[] =
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"only implementing non-interactive mode\n"
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"I totally forgot nslookup even had an interactive mode\n"
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;
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/* */
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static void
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server_fprint(FILE *dst)
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{
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fprintf(dst, "Server: %s\n", "something");
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fprintf(dst, "Address: %s\n\n", "something");
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}
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/* only works for IPv4 */
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static int
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addr_fprint(char *addr, FILE *dst)
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{
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uint8_t split[4];
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uint32_t ip;
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uint32_t *x = (uint32_t *) addr;
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ip = ntohl(*x);
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split[0] = (ip & 0xff000000) >> 24;
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split[1] = (ip & 0x00ff0000) >> 16;
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split[2] = (ip & 0x0000ff00) >> 8;
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split[3] = (ip & 0x000000ff);
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fprintf (
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dst, "%d.%d.%d.%d",
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split[0], split[1], split[2], split[3]
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);
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return 0;
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}
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/* */
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static uint32_t
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str_to_addr(const char *addr)
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{
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uint32_t split[4];
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uint32_t ip;
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sscanf(addr, "%d.%d.%d.%d",
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&split[0], &split[1], &split[2], &split[3]);
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/* assuming sscanf worked */
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ip = (split[0] << 24) |
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(split[1] << 16) |
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(split[2] << 8) |
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(split[3]);
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return htonl(ip);
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}
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/* */
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static int
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addr_list_fprint(char **h_addr_list, FILE *dst)
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{
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int i;
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char *addr_string = (h_addr_list[1])
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? "Addresses"
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: "Address";
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fprintf(dst, "%s: ", addr_string);
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for (i = 0; h_addr_list[i]; i++) {
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addr_fprint(h_addr_list[i], dst);
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if (h_addr_list[i+1]) {
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fprintf(dst, ", ");
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}
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}
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fprintf(dst,"\n");
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return 0;
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}
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/* */
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static struct hostent *
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lookup_by_name(const char *hostname)
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{
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struct hostent *host;
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host = gethostbyname(hostname);
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if (host) {
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fprintf(stdout, "Name: %s\n", host->h_name);
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addr_list_fprint(host->h_addr_list, stdout);
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} else {
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herror("crap");
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}
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return host;
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}
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/* */
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static struct hostent *
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lookup_by_addr(const char *addr)
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{
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struct hostent *host;
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host = gethostbyaddr(addr, 4, AF_INET); /* IPv4 only for now */
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if (host) {
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fprintf(stdout, "Name: %s\n", host->h_name);
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addr_list_fprint(host->h_addr_list, stdout);
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} else {
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herror("crap");
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}
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return host;
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}
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/* */
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static int
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is_ip_address(const char *s)
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{
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while (*s) {
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if ((isdigit(*s)) || (*s == '.')) { s++; continue; }
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return 0;
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}
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return 1;
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}
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/* ________________________________________________________________________ */
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int
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nslookup_main(int argc, char **argv)
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{
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struct in_addr addr;
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server_fprint(stdout);
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if (is_ip_address(argv[1])) {
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addr.s_addr = str_to_addr(argv[1]);
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lookup_by_addr((char *) &addr);
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} else {
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lookup_by_name(argv[1]);
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}
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return 0;
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}
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/* $Id: nslookup.c,v 1.1 2000/01/29 12:59:01 beppu Exp $ */
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168
nslookup.c
Normal file
168
nslookup.c
Normal file
@ -0,0 +1,168 @@
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/*
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* Mini nslookup implementation for busybox
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*
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*
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* Copyright (C) 2000 by Lineo, inc.
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* Written by John Beppu <beppu@lineo.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "internal.h"
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#include <ctype.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <netdb.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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static const char nslookup_usage[] =
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"only implementing non-interactive mode\n"
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"I totally forgot nslookup even had an interactive mode\n"
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;
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/* */
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static void
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server_fprint(FILE *dst)
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{
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fprintf(dst, "Server: %s\n", "something");
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fprintf(dst, "Address: %s\n\n", "something");
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}
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/* only works for IPv4 */
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static int
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addr_fprint(char *addr, FILE *dst)
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{
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uint8_t split[4];
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uint32_t ip;
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uint32_t *x = (uint32_t *) addr;
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ip = ntohl(*x);
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split[0] = (ip & 0xff000000) >> 24;
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split[1] = (ip & 0x00ff0000) >> 16;
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split[2] = (ip & 0x0000ff00) >> 8;
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split[3] = (ip & 0x000000ff);
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fprintf (
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dst, "%d.%d.%d.%d",
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split[0], split[1], split[2], split[3]
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);
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return 0;
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}
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/* */
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static uint32_t
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str_to_addr(const char *addr)
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{
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uint32_t split[4];
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uint32_t ip;
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sscanf(addr, "%d.%d.%d.%d",
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&split[0], &split[1], &split[2], &split[3]);
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/* assuming sscanf worked */
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ip = (split[0] << 24) |
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(split[1] << 16) |
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(split[2] << 8) |
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(split[3]);
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return htonl(ip);
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}
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/* */
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static int
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addr_list_fprint(char **h_addr_list, FILE *dst)
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{
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int i;
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char *addr_string = (h_addr_list[1])
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? "Addresses"
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: "Address";
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fprintf(dst, "%s: ", addr_string);
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for (i = 0; h_addr_list[i]; i++) {
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addr_fprint(h_addr_list[i], dst);
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if (h_addr_list[i+1]) {
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fprintf(dst, ", ");
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}
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}
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fprintf(dst,"\n");
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return 0;
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}
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/* */
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static struct hostent *
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lookup_by_name(const char *hostname)
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{
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struct hostent *host;
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host = gethostbyname(hostname);
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if (host) {
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fprintf(stdout, "Name: %s\n", host->h_name);
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addr_list_fprint(host->h_addr_list, stdout);
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} else {
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herror("crap");
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}
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return host;
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}
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/* */
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static struct hostent *
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lookup_by_addr(const char *addr)
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{
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struct hostent *host;
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host = gethostbyaddr(addr, 4, AF_INET); /* IPv4 only for now */
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if (host) {
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fprintf(stdout, "Name: %s\n", host->h_name);
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addr_list_fprint(host->h_addr_list, stdout);
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} else {
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herror("crap");
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}
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return host;
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}
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/* */
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static int
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is_ip_address(const char *s)
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{
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while (*s) {
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if ((isdigit(*s)) || (*s == '.')) { s++; continue; }
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return 0;
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}
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return 1;
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}
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/* ________________________________________________________________________ */
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int
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nslookup_main(int argc, char **argv)
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{
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struct in_addr addr;
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server_fprint(stdout);
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if (is_ip_address(argv[1])) {
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addr.s_addr = str_to_addr(argv[1]);
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lookup_by_addr((char *) &addr);
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} else {
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lookup_by_name(argv[1]);
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}
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return 0;
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}
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/* $Id: nslookup.c,v 1.1 2000/01/29 12:59:01 beppu Exp $ */
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