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Diffstat (limited to 'i/pc104/initrd/conf/busybox/networking/ipcalc.c')
-rw-r--r--i/pc104/initrd/conf/busybox/networking/ipcalc.c195
1 files changed, 195 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/networking/ipcalc.c b/i/pc104/initrd/conf/busybox/networking/ipcalc.c
new file mode 100644
index 0000000..63ce99f
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/networking/ipcalc.c
@@ -0,0 +1,195 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini ipcalc implementation for busybox
+ *
+ * By Jordan Crouse <jordan@cosmicpenguin.net>
+ * Stephan Linz <linz@li-pro.net>
+ *
+ * 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 "busybox.h"
+#include <ctype.h>
+#include <getopt.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+
+#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;
+}
+
+#ifdef CONFIG_FEATURE_IPCALC_FANCY
+static int get_prefix(unsigned long netmask)
+{
+ unsigned long msk = 0x80000000;
+ int ret = 0;
+
+ netmask = htonl(netmask);
+ while (msk) {
+ if (netmask & msk)
+ ret++;
+ msk >>= 1;
+ }
+ return ret;
+}
+#else
+int get_prefix(unsigned long netmask);
+#endif
+
+
+#define NETMASK 0x01
+#define BROADCAST 0x02
+#define NETWORK 0x04
+#define NETPREFIX 0x08
+#define HOSTNAME 0x10
+#define SILENT 0x20
+
+#if ENABLE_FEATURE_IPCALC_LONG_OPTIONS
+ static const struct option long_options[] = {
+ { "netmask", no_argument, NULL, 'm' },
+ { "broadcast", no_argument, NULL, 'b' },
+ { "network", no_argument, NULL, 'n' },
+# if ENABLE_FEATURE_IPCALC_FANCY
+ { "prefix", no_argument, NULL, 'p' },
+ { "hostname", no_argument, NULL, 'h' },
+ { "silent", no_argument, NULL, 's' },
+# endif
+ { NULL, 0, NULL, 0 }
+ };
+#endif
+
+int ipcalc_main(int argc, char **argv);
+int ipcalc_main(int argc, char **argv)
+{
+ unsigned opt;
+ int have_netmask = 0;
+ in_addr_t netmask, broadcast, network, ipaddr;
+ struct in_addr a;
+ char *ipstr;
+
+#if ENABLE_FEATURE_IPCALC_LONG_OPTIONS
+ applet_long_options = long_options;
+#endif
+ opt = getopt32(argc, argv, "mbn" USE_FEATURE_IPCALC_FANCY("phs"));
+ argc -= optind;
+ argv += optind;
+ if (opt & (BROADCAST | NETWORK | NETPREFIX)) {
+ if (argc > 2 || argc <= 0)
+ bb_show_usage();
+ } else {
+ if (argc != 1)
+ bb_show_usage();
+ }
+ if (opt & SILENT)
+ logmode = LOGMODE_NONE; /* Suppress error_msg() output */
+
+ 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 msk;
+ netprefix = xatoul_range(prefixstr, 0, 32);
+ 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;
+ }
+ break;
+ }
+ prefixstr++;
+ }
+ }
+ ipaddr = inet_aton(ipstr, &a);
+
+ if (ipaddr == 0) {
+ bb_error_msg_and_die("bad IP address: %s", argv[0]);
+ }
+ ipaddr = a.s_addr;
+
+ if (argc == 2) {
+ if (ENABLE_FEATURE_IPCALC_FANCY && have_netmask) {
+ bb_error_msg_and_die("use prefix or netmask, not both");
+ }
+
+ netmask = inet_aton(argv[1], &a);
+ if (netmask == 0) {
+ bb_error_msg_and_die("bad netmask: %s", argv[1]);
+ }
+ netmask = a.s_addr;
+ } else {
+
+ /* JHC - If the netmask wasn't provided then calculate it */
+ if (!ENABLE_FEATURE_IPCALC_FANCY || !have_netmask)
+ netmask = get_netmask(ipaddr);
+ }
+
+ if (opt & NETMASK) {
+ printf("NETMASK=%s\n", inet_ntoa((*(struct in_addr *) &netmask)));
+ }
+
+ if (opt & BROADCAST) {
+ broadcast = (ipaddr & netmask) | ~netmask;
+ printf("BROADCAST=%s\n", inet_ntoa((*(struct in_addr *) &broadcast)));
+ }
+
+ if (opt & NETWORK) {
+ network = ipaddr & netmask;
+ printf("NETWORK=%s\n", inet_ntoa((*(struct in_addr *) &network)));
+ }
+
+ if (ENABLE_FEATURE_IPCALC_FANCY) {
+ if (opt & NETPREFIX) {
+ printf("PREFIX=%i\n", get_prefix(netmask));
+ }
+
+ if (opt & HOSTNAME) {
+ struct hostent *hostinfo;
+ int x;
+
+ hostinfo = gethostbyaddr((char *) &ipaddr, sizeof(ipaddr), AF_INET);
+ if (!hostinfo) {
+ bb_herror_msg_and_die("cannot find hostname for %s", argv[0]);
+ }
+ for (x = 0; hostinfo->h_name[x]; x++) {
+ hostinfo->h_name[x] = tolower(hostinfo->h_name[x]);
+ }
+
+ printf("HOSTNAME=%s\n", hostinfo->h_name);
+ }
+ }
+
+ return EXIT_SUCCESS;
+}