mirror of
https://github.com/sheumann/hush.git
synced 2024-11-10 09:05:29 +00:00
7207b88d06
This patch fixes endian problems with get_netmask(). I don't know if
this is the cleanest solution, but it makes 'ipcalc -n' work on both
an i386 system and a ppc system.
151 lines
3.3 KiB
C
151 lines
3.3 KiB
C
/* vi: set sw=4 ts=4 ai: */
|
|
/*
|
|
* Mini ipcalc implementation for busybox
|
|
*
|
|
* By Jordan Crouse <jordan@cosmicpenguin.net>
|
|
* Stephan Linz <linz@li-pro.net>
|
|
*
|
|
* This is a complete reimplentation of the ipcalc program
|
|
* from Redhat. I didn't look at their source code, but there
|
|
* is no denying that this is a loving reimplementation
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <ctype.h>
|
|
#include <getopt.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
|
|
#include "busybox.h"
|
|
|
|
#define IPCALC_MSG(CMD,ALTCMD) if (mode & SILENT) {ALTCMD;} else {CMD;}
|
|
|
|
#define CLASS_A_NETMASK ntohl(0xFF000000)
|
|
#define CLASS_B_NETMASK ntohl(0xFFFF0000)
|
|
#define CLASS_C_NETMASK ntohl(0xFFFFFF00)
|
|
|
|
static unsigned long get_netmask(unsigned long ipaddr)
|
|
{
|
|
ipaddr = htonl(ipaddr);
|
|
|
|
if ((ipaddr & 0xC0000000) == 0xC0000000)
|
|
return CLASS_C_NETMASK;
|
|
else if ((ipaddr & 0x80000000) == 0x80000000)
|
|
return CLASS_B_NETMASK;
|
|
else if ((ipaddr & 0x80000000) == 0)
|
|
return CLASS_A_NETMASK;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
#define NETMASK 0x01
|
|
#define BROADCAST 0x02
|
|
#define NETWORK 0x04
|
|
#define HOSTNAME 0x08
|
|
#define SILENT 0x10
|
|
|
|
int ipcalc_main(int argc, char **argv)
|
|
{
|
|
unsigned long mode;
|
|
|
|
unsigned long netmask = 0;
|
|
unsigned long broadcast;
|
|
unsigned long network;
|
|
unsigned long ipaddr;
|
|
|
|
static const struct option long_options[] = {
|
|
{"netmask", no_argument, NULL, 'n'},
|
|
{"broadcast", no_argument, NULL, 'b'},
|
|
{"network", no_argument, NULL, 'w'},
|
|
#ifdef CONFIG_FEATURE_IPCALC_FANCY
|
|
{"hostname", no_argument, NULL, 'h'},
|
|
{"silent", no_argument, NULL, 's'},
|
|
#endif
|
|
{NULL, 0, NULL, 0}
|
|
};
|
|
|
|
bb_applet_long_options = long_options;
|
|
mode = bb_getopt_ulflags(argc, argv,
|
|
#ifdef CONFIG_FEATURE_IPCALC_FANCY
|
|
"nbwhs");
|
|
#else
|
|
"nbw");
|
|
#endif
|
|
if (mode & (BROADCAST | NETWORK)) {
|
|
if (argc - optind > 2) {
|
|
bb_show_usage();
|
|
}
|
|
} else {
|
|
if (argc - optind != 1) {
|
|
bb_show_usage();
|
|
}
|
|
}
|
|
|
|
ipaddr = inet_addr(argv[optind]);
|
|
|
|
if (ipaddr == INADDR_NONE) {
|
|
IPCALC_MSG(bb_error_msg_and_die("bad IP address: %s", argv[optind]),
|
|
exit(EXIT_FAILURE));
|
|
}
|
|
|
|
|
|
if (argc - optind == 2) {
|
|
netmask = inet_addr(argv[optind + 1]);
|
|
}
|
|
|
|
if (ipaddr == INADDR_NONE) {
|
|
IPCALC_MSG(bb_error_msg_and_die("bad netmask: %s", argv[optind + 1]),
|
|
exit(EXIT_FAILURE));
|
|
}
|
|
|
|
/* JHC - If the netmask wasn't provided then calculate it */
|
|
if (!netmask) {
|
|
netmask = get_netmask(ipaddr);
|
|
}
|
|
|
|
if (mode & NETMASK) {
|
|
printf("NETMASK=%s\n", inet_ntoa((*(struct in_addr *) &netmask)));
|
|
}
|
|
|
|
if (mode & BROADCAST) {
|
|
broadcast = (ipaddr & netmask) | ~netmask;
|
|
printf("BROADCAST=%s\n", inet_ntoa((*(struct in_addr *) &broadcast)));
|
|
}
|
|
|
|
if (mode & NETWORK) {
|
|
network = ipaddr & netmask;
|
|
printf("NETWORK=%s\n", inet_ntoa((*(struct in_addr *) &network)));
|
|
}
|
|
#ifdef CONFIG_FEATURE_IPCALC_FANCY
|
|
if (mode & HOSTNAME) {
|
|
struct hostent *hostinfo;
|
|
int x;
|
|
|
|
hostinfo = gethostbyaddr((char *) &ipaddr, sizeof(ipaddr), AF_INET);
|
|
if (!hostinfo) {
|
|
IPCALC_MSG(bb_herror_msg_and_die(
|
|
"cannot find hostname for %s", argv[optind]),);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
for (x = 0; hostinfo->h_name[x]; x++) {
|
|
hostinfo->h_name[x] = tolower(hostinfo->h_name[x]);
|
|
}
|
|
|
|
printf("HOSTNAME=%s\n", hostinfo->h_name);
|
|
}
|
|
#endif
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
/* END CODE */
|
|
/*
|
|
Local Variables:
|
|
c-file-style: "linux"
|
|
c-basic-offset: 4
|
|
tab-width: 4
|
|
End:
|
|
*/
|