diff options
Diffstat (limited to 'networking')
| -rw-r--r-- | networking/Makefile.in | 1 | ||||
| -rw-r--r-- | networking/config.in | 4 | ||||
| -rw-r--r-- | networking/ipcalc.c | 164 |
3 files changed, 169 insertions, 0 deletions
diff --git a/networking/Makefile.in b/networking/Makefile.in index d249c0423..7404b041d 100644 --- a/networking/Makefile.in +++ b/networking/Makefile.in @@ -27,6 +27,7 @@ NETWORKING-$(CONFIG_HOSTNAME) += hostname.o NETWORKING-$(CONFIG_IFCONFIG) += ifconfig.o NETWORKING-$(CONFIG_IFUPDOWN) += ifupdown.o NETWORKING-$(CONFIG_IP) += ip.o +NETWORKING-$(CONFIG_IPCALC) += ipcalc.o NETWORKING-$(CONFIG_NC) += nc.o NETWORKING-$(CONFIG_NETSTAT) += netstat.o NETWORKING-$(CONFIG_NSLOOKUP) += nslookup.o diff --git a/networking/config.in b/networking/config.in index 7393febae..27a8ab571 100644 --- a/networking/config.in +++ b/networking/config.in @@ -30,6 +30,10 @@ if [ "$CONFIG_IP" = "y" ]; then bool ' route' CONFIG_FEATURE_IP_ROUTE bool ' tunnel' CONFIG_FEATURE_IP_TUNNEL fi +bool 'ipcalc' CONFIG_IPCALC +if [ "$CONFIG_IPCALC" = "y" ]; then + bool ' Fancy IPCALC, more options, adds 300 bytes' CONFIG_FEATURE_IPCALC_FANCY +fi bool 'nc' CONFIG_NC bool 'netstat' CONFIG_NETSTAT bool 'nslookup' CONFIG_NSLOOKUP 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: +*/ |