diff options
Diffstat (limited to 'networking/ipcalc.c')
| -rw-r--r-- | networking/ipcalc.c | 157 |
1 files changed, 72 insertions, 85 deletions
diff --git a/networking/ipcalc.c b/networking/ipcalc.c index ade4ed1..8c61e3a 100644 --- a/networking/ipcalc.c +++ b/networking/ipcalc.c @@ -12,16 +12,12 @@ * 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) @@ -56,6 +52,8 @@ static int get_prefix(unsigned long netmask) } return ret; } +#else +int get_prefix(unsigned long netmask); #endif #define NETMASK 0x01 @@ -65,23 +63,6 @@ static int get_prefix(unsigned long netmask) #define HOSTNAME 0x10 #define SILENT 0x20 - -int ipcalc_main(int argc, char **argv) -{ - unsigned long mode; - - in_addr_t netmask; - in_addr_t broadcast; - in_addr_t network; - in_addr_t 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'}, @@ -94,16 +75,24 @@ int ipcalc_main(int argc, char **argv) #endif {NULL, 0, NULL, 0} }; - - bb_applet_long_options = long_options; -#endif - 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; @@ -115,40 +104,42 @@ int ipcalc_main(int argc, char **argv) bb_show_usage(); } -#ifdef CONFIG_FEATURE_IPCALC_FANCY - prefixstr = ipstr = argv[0]; - - 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\n", 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[0], &a); -#endif if (ipaddr == 0) { IPCALC_MSG(bb_error_msg_and_die("bad IP address: %s", argv[0]), @@ -157,13 +148,11 @@ int ipcalc_main(int argc, char **argv) ipaddr = a.s_addr; if (argc == 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 (ENABLE_FEATURE_IPCALC_FANCY && have_netmask) { + IPCALC_MSG(bb_error_msg_and_die("Use prefix or netmask, not both.\n"), exit(EXIT_FAILURE)); } -#endif netmask = inet_aton(argv[1], &a); if (netmask == 0) { IPCALC_MSG(bb_error_msg_and_die("bad netmask: %s", argv[1]), @@ -171,11 +160,9 @@ int ipcalc_main(int argc, char **argv) } 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); } @@ -193,28 +180,28 @@ int ipcalc_main(int argc, char **argv) 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[0]),); - 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; } |