-/* vi: set sw=4 ts=4 ai: */
+/* vi: set sw=4 ts=4: */
/*
* Mini ipcalc implementation for busybox
*
* This is a complete reimplementation of the ipcalc program
* from Red Hat. I didn't look at their source code, but there
* is no denying that this is a loving reimplementation
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-#include <stdio.h>
-#include <stdlib.h>
+#include "busybox.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)
}
return ret;
}
+#else
+int get_prefix(unsigned long netmask);
#endif
#define NETMASK 0x01
#define HOSTNAME 0x10
#define SILENT 0x20
-
-int ipcalc_main(int argc, char **argv)
-{
- unsigned long mode;
-
- unsigned long netmask;
- unsigned long broadcast;
- unsigned long network;
- unsigned long ipaddr;
- struct in_addr a;
-
-#ifdef CONFIG_FEATURE_IPCALC_FANCY
- unsigned long netprefix = 0;
- int have_netmask = 0;
- char *ipstr, *prefixstr;
-#endif
-
+#if ENABLE_FEATURE_IPCALC_LONG_OPTIONS
static const struct option long_options[] = {
{"netmask", no_argument, NULL, 'm'},
{"broadcast", no_argument, NULL, 'b'},
#endif
{NULL, 0, NULL, 0}
};
-
- bb_applet_long_options = long_options;
- mode = bb_getopt_ulflags(argc, argv,
-#ifdef CONFIG_FEATURE_IPCALC_FANCY
- "mbnphs"
#else
- "mbn"
+#define long_options 0
#endif
- );
+
+
+
+int ipcalc_main(int argc, char **argv)
+{
+ unsigned long mode;
+ int have_netmask = 0;
+ in_addr_t netmask, broadcast, network, ipaddr;
+ struct in_addr a;
+ char *ipstr;
+
+ if (ENABLE_FEATURE_IPCALC_LONG_OPTIONS)
+ bb_applet_long_options = long_options;
+
+ mode = bb_getopt_ulflags(argc, argv, "mbn" USE_FEATURE_IPCALC_FANCY("phs"));
+
+ argc -= optind;
+ argv += optind;
if (mode & (BROADCAST | NETWORK | NETPREFIX)) {
- if (argc - optind > 2) {
+ if (argc > 2 || argc <= 0)
bb_show_usage();
- }
} else {
- if (argc - optind != 1) {
+ if (argc != 1)
bb_show_usage();
- }
}
-#ifdef CONFIG_FEATURE_IPCALC_FANCY
- prefixstr = ipstr = argv[optind];
-
- while(*prefixstr) {
- if (*prefixstr == '/') {
- *prefixstr = (char)0;
- prefixstr++;
- if (*prefixstr) {
- unsigned int msk;
-
- if (safe_strtoul(prefixstr, &netprefix) || netprefix > 32) {
- IPCALC_MSG(bb_error_msg_and_die("bad IP prefix: %s\n", prefixstr),
- exit(EXIT_FAILURE));
- }
- netmask = 0;
- msk = 0x80000000;
- while (netprefix > 0) {
- netmask |= msk;
- msk >>= 1;
- netprefix--;
+ ipstr = argv[0];
+ if (ENABLE_FEATURE_IPCALC_FANCY) {
+ unsigned long netprefix = 0;
+ char *prefixstr;
+
+ prefixstr = ipstr;
+
+ while(*prefixstr) {
+ if (*prefixstr == '/') {
+ *prefixstr = (char)0;
+ prefixstr++;
+ if (*prefixstr) {
+ unsigned int msk;
+
+ if (safe_strtoul(prefixstr, &netprefix) || netprefix > 32) {
+ IPCALC_MSG(bb_error_msg_and_die("bad IP prefix: %s", prefixstr),
+ exit(EXIT_FAILURE));
+ }
+ netmask = 0;
+ msk = 0x80000000;
+ while (netprefix > 0) {
+ netmask |= msk;
+ msk >>= 1;
+ netprefix--;
+ }
+ netmask = htonl(netmask);
+ /* Even if it was 0, we will signify that we have a netmask. This allows */
+ /* for specification of default routes, etc which have a 0 netmask/prefix */
+ have_netmask = 1;
}
- netmask = htonl(netmask);
- /* Even if it was 0, we will signify that we have a netmask. This allows */
- /* for specification of default routes, etc which have a 0 netmask/prefix */
- have_netmask = 1;
+ break;
}
- break;
+ prefixstr++;
}
- prefixstr++;
}
ipaddr = inet_aton(ipstr, &a);
-#else
- ipaddr = inet_aton(argv[optind], &a);
-#endif
if (ipaddr == 0) {
- IPCALC_MSG(bb_error_msg_and_die("bad IP address: %s", argv[optind]),
+ IPCALC_MSG(bb_error_msg_and_die("bad IP address: %s", argv[0]),
exit(EXIT_FAILURE));
}
ipaddr = a.s_addr;
- if (argc - optind == 2) {
-#ifdef CONFIG_FEATURE_IPCALC_FANCY
- if (have_netmask) {
- IPCALC_MSG(bb_error_msg_and_die("Both prefix and netmask were specified, use one or the other.\n"),
+ if (argc == 2) {
+ if (ENABLE_FEATURE_IPCALC_FANCY && have_netmask) {
+ IPCALC_MSG(bb_error_msg_and_die("Use prefix or netmask, not both"),
exit(EXIT_FAILURE));
}
-#endif
- netmask = inet_aton(argv[optind + 1], &a);
+ netmask = inet_aton(argv[1], &a);
if (netmask == 0) {
- IPCALC_MSG(bb_error_msg_and_die("bad netmask: %s", argv[optind + 1]),
+ IPCALC_MSG(bb_error_msg_and_die("bad netmask: %s", argv[1]),
exit(EXIT_FAILURE));
}
netmask = a.s_addr;
} else {
-#ifdef CONFIG_FEATURE_IPCALC_FANCY
- if (!have_netmask)
-#endif
- /* JHC - If the netmask wasn't provided then calculate it */
+ /* JHC - If the netmask wasn't provided then calculate it */
+ if (!ENABLE_FEATURE_IPCALC_FANCY || !have_netmask)
netmask = get_netmask(ipaddr);
}
printf("NETWORK=%s\n", inet_ntoa((*(struct in_addr *) &network)));
}
-#ifdef CONFIG_FEATURE_IPCALC_FANCY
- if (mode & NETPREFIX) {
- printf("PREFIX=%i\n", get_prefix(netmask));
- }
+ if (ENABLE_FEATURE_IPCALC_FANCY) {
+ if (mode & NETPREFIX) {
+ printf("PREFIX=%i\n", get_prefix(netmask));
+ }
- if (mode & HOSTNAME) {
- struct hostent *hostinfo;
- int x;
+ 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]);
- }
+ hostinfo = gethostbyaddr((char *) &ipaddr, sizeof(ipaddr), AF_INET);
+ if (!hostinfo) {
+ IPCALC_MSG(bb_herror_msg_and_die(
+ "cannot find hostname for %s", argv[0]),);
+ 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);
+ 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:
-*/
projects / oweals / busybox.git / blobdiff