ipcalc applet by Stephan Linz and Jordan Crouse

author: Glenn L McGrath <bug1@ihug.co.nz> 2002-11-10 23:42:27 +0000
committer: Glenn L McGrath <bug1@ihug.co.nz> 2002-11-10 23:42:27 +0000
commit: c11986d89eba564945b226660031e624bf897561 (patch)
tree: 916cab407d266dbbf8f0069e65ab0434583b336c /networking/ipcalc.c
parent: 912d8f4cbc724ce6ef9d8bd3f73d16d7ef4cf069 (diff)
download: busybox-w32-c11986d89eba564945b226660031e624bf897561.tar.gz
busybox-w32-c11986d89eba564945b226660031e624bf897561.tar.bz2
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1 files changed, 164 insertions, 0 deletions
diff --git a/networking/ipcalc.c b/networking/ipcalc.c
new file mode 100644
index 000000000..f130f3b7c
--- /dev/null
+++ b/networking/ipcalc.c
@@ -0,0 +1,164 @@
+/* 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;}
+static unsigned long get_netmask(unsigned long ipaddr)
+{
+        if (ipaddr & 0xC0) {
+                return 0x00FFFFFF;      /* Class C */
+        }
+        if (ipaddr & 0x10) {
+                return 0x0000FFFF;      /* Class B */
+        }
+        return 0x000000FF;      /* Class A */
+}
+#define NETMASK   0x01
+#define BROADCAST 0x02
+#define NETWORK   0x04
+#define HOSTNAME  0x08
+#define SILENT    0x80
+int ipcalc_main(int argc, char **argv)
+{
+        unsigned char mode = 0;
+        unsigned long netmask = 0;
+        unsigned long broadcast = 0;
+        unsigned long network = 0;
+        unsigned long ipaddr = 0;
+        int opt = 0;
+        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}
+        };
+        while ((opt = getopt_long(argc, argv,
+#ifdef CONFIG_FEATURE_IPCALC_FANCY
+                                                          "nbwhs",
+#else
+                                                          "nbw",
+#endif
+                                                          long_options, NULL)) != EOF) {
+                if (opt == 'n')
+                        mode |= NETMASK;
+                else if (opt == 'b')
+                        mode |= BROADCAST;
+                else if (opt == 'w')
+                        mode |= NETWORK;
+#ifdef CONFIG_FEATURE_IPCALC_FANCY
+                else if (opt == 'h')
+                        mode |= HOSTNAME;
+                else if (opt == 's')
+                        mode |= SILENT;
+#endif
+                else {
+                        show_usage();
+                }
+        }
+        if (mode & (BROADCAST | NETWORK)) {
+                if (argc - optind > 2) {
+                        show_usage();
+                }
+        } else {
+                if (argc - optind != 1) {
+                        show_usage();
+                }
+        }
+        ipaddr = inet_addr(argv[optind]);
+        if (ipaddr == INADDR_NONE) {
+                IPCALC_MSG(error_msg_and_die("bad IP address: %s\n", argv[optind]),
+                                   exit(EXIT_FAILURE));
+        }
+        if (argc - optind == 2) {
+                netmask = inet_addr(argv[optind + 1]);
+        }
+        if (ipaddr == INADDR_NONE) {
+                IPCALC_MSG(error_msg_and_die("bad netmask: %s\n", 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(error_msg("cannot find hostname for %s", argv[optind]);
+                                           herror(NULL);
+                                           putc('\n', stderr);,);
+                        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:
+*/
author	Glenn L McGrath <bug1@ihug.co.nz>	2002-11-10 23:42:27 +0000
committer	Glenn L McGrath <bug1@ihug.co.nz>	2002-11-10 23:42:27 +0000
commit	c11986d89eba564945b226660031e624bf897561 (patch)
tree	916cab407d266dbbf8f0069e65ab0434583b336c /networking/ipcalc.c
parent	912d8f4cbc724ce6ef9d8bd3f73d16d7ef4cf069 (diff)
download	busybox-w32-c11986d89eba564945b226660031e624bf897561.tar.gz busybox-w32-c11986d89eba564945b226660031e624bf897561.tar.bz2 busybox-w32-c11986d89eba564945b226660031e624bf897561.zip

diff --git a/networking/ipcalc.c b/networking/ipcalc.c new file mode 100644 index 000000000..f130f3b7c --- /dev/null +++ b/networking/ipcalc.c
@@ -0,0 +1,164 @@
	1	/* vi: set sw=4 ts=4 ai: */
	2	/*
	3	* Mini ipcalc implementation for busybox
	4	*
	5	* By Jordan Crouse <jordan@cosmicpenguin.net>
	6	* Stephan Linz <linz@li-pro.net>
	7	*
	8	* This is a complete reimplentation of the ipcalc program
	9	* from Redhat. I didn't look at their source code, but there
	10	* is no denying that this is a loving reimplementation
	11	*/
	12
	13	#include <stdio.h>
	14	#include <stdlib.h>
	15	#include <ctype.h>
	16	#include <getopt.h>
	17	#include <sys/socket.h>
	18	#include <netinet/in.h>
	19	#include <arpa/inet.h>
	20
	21	#include "busybox.h"
	22
	23	#define IPCALC_MSG(CMD,ALTCMD) if (mode & SILENT) {ALTCMD;} else {CMD;}
	24
	25	static unsigned long get_netmask(unsigned long ipaddr)
	26	{
	27	if (ipaddr & 0xC0) {
	28	return 0x00FFFFFF; /* Class C */
	29	}
	30	if (ipaddr & 0x10) {
	31	return 0x0000FFFF; /* Class B */
	32	}
	33	return 0x000000FF; /* Class A */
	34	}
	35
	36	#define NETMASK 0x01
	37	#define BROADCAST 0x02
	38	#define NETWORK 0x04
	39	#define HOSTNAME 0x08
	40	#define SILENT 0x80
	41
	42	int ipcalc_main(int argc, char **argv)
	43	{
	44	unsigned char mode = 0;
	45
	46	unsigned long netmask = 0;
	47	unsigned long broadcast = 0;
	48	unsigned long network = 0;
	49	unsigned long ipaddr = 0;
	50
	51	int opt = 0;
	52
	53	struct option long_options[] = {
	54	{"netmask", no_argument, NULL, 'n'},
	55	{"broadcast", no_argument, NULL, 'b'},
	56	{"network", no_argument, NULL, 'w'},
	57	#ifdef CONFIG_FEATURE_IPCALC_FANCY
	58	{"hostname", no_argument, NULL, 'h'},
	59	{"silent", no_argument, NULL, 's'},
	60	#endif
	61	{NULL, 0, NULL, 0}
	62	};
	63
	64
	65	while ((opt = getopt_long(argc, argv,
	66	#ifdef CONFIG_FEATURE_IPCALC_FANCY
	67	"nbwhs",
	68	#else
	69	"nbw",
	70	#endif
	71	long_options, NULL)) != EOF) {
	72	if (opt == 'n')
	73	mode \|= NETMASK;
	74	else if (opt == 'b')
	75	mode \|= BROADCAST;
	76	else if (opt == 'w')
	77	mode \|= NETWORK;
	78	#ifdef CONFIG_FEATURE_IPCALC_FANCY
	79	else if (opt == 'h')
	80	mode \|= HOSTNAME;
	81	else if (opt == 's')
	82	mode \|= SILENT;
	83	#endif
	84	else {
	85	show_usage();
	86	}
	87	}
	88
	89	if (mode & (BROADCAST \| NETWORK)) {
	90	if (argc - optind > 2) {
	91	show_usage();
	92	}
	93	} else {
	94	if (argc - optind != 1) {
	95	show_usage();
	96	}
	97	}
	98
	99	ipaddr = inet_addr(argv[optind]);
	100
	101	if (ipaddr == INADDR_NONE) {
	102	IPCALC_MSG(error_msg_and_die("bad IP address: %s\n", argv[optind]),
	103	exit(EXIT_FAILURE));
	104	}
	105
	106
	107	if (argc - optind == 2) {
	108	netmask = inet_addr(argv[optind + 1]);
	109	}
	110
	111	if (ipaddr == INADDR_NONE) {
	112	IPCALC_MSG(error_msg_and_die("bad netmask: %s\n", argv[optind + 1]),
	113	exit(EXIT_FAILURE));
	114	}
	115
	116	/* JHC - If the netmask wasn't provided then calculate it */
	117	if (!netmask) {
	118	netmask = get_netmask(ipaddr);
	119	}
	120
	121	if (mode & NETMASK) {
	122	printf("NETMASK=%s\n", inet_ntoa(((struct in_addr ) &netmask)));
	123	}
	124
	125	if (mode & BROADCAST) {
	126	broadcast = (ipaddr & netmask) \| ~netmask;
	127	printf("BROADCAST=%s\n", inet_ntoa(((struct in_addr ) &broadcast)));
	128	}
	129
	130	if (mode & NETWORK) {
	131	network = ipaddr & netmask;
	132	printf("NETWORK=%s\n", inet_ntoa(((struct in_addr ) &network)));
	133	}
	134	#ifdef CONFIG_FEATURE_IPCALC_FANCY
	135	if (mode & HOSTNAME) {
	136	struct hostent *hostinfo;
	137	int x;
	138
	139	hostinfo = gethostbyaddr((char *) &ipaddr, sizeof(ipaddr), AF_INET);
	140	if (!hostinfo) {
	141	IPCALC_MSG(error_msg("cannot find hostname for %s", argv[optind]);
	142	herror(NULL);
	143	putc('\n', stderr);,);
	144	exit(EXIT_FAILURE);
	145	}
	146	for (x = 0; hostinfo->h_name[x]; x++) {
	147	hostinfo->h_name[x] = tolower(hostinfo->h_name[x]);
	148	}
	149
	150	printf("HOSTNAME=%s\n", hostinfo->h_name);
	151	}
	152	#endif
	153
	154	return EXIT_SUCCESS;
	155	}
	156
	157	/* END CODE */
	158	/*
	159	Local Variables:
	160	c-file-style: "linux"
	161	c-basic-offset: 4
	162	tab-width: 4
	163	End:
	164	*/