{"id":7423,"date":"2016-07-13T13:26:47","date_gmt":"2016-07-13T04:26:47","guid":{"rendered":"http:\/\/www.skyarch.net\/blog\/?p=7423"},"modified":"2018-02-09T18:30:43","modified_gmt":"2018-02-09T09:30:43","slug":"ping%e3%81%a8ip%e3%82%a2%e3%83%89%e3%83%ac%e3%82%b9%e3%81%ae%e7%a7%98%e5%af%86","status":"publish","type":"post","link":"https:\/\/www.skyarch.net\/blog\/ping%e3%81%a8ip%e3%82%a2%e3%83%89%e3%83%ac%e3%82%b9%e3%81%ae%e7%a7%98%e5%af%86\/","title":{"rendered":"\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u306e\u79d8\u5bc6"},"content":{"rendered":"

\u3053\u3093\u306b\u3061\u306f\u3001\u5e45\u5e83\u3044\u8996\u91ce\u3092\u6301\u3064\u30a8\u30f3\u30b8\u30cb\u30a2\u3092\u76ee\u6307\u3057\u3066\u3044\u307e\u3059\u7530\u4e2d\u3068\u7533\u3057\u307e\u3059\u3002<\/p>\n

\u4eca\u65e5\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u306e\u6271\u3044\u65b9\u3092\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n

\u76ee\u7684<\/h1>\n

\u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u3001\u7279\u5b9a\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u7bc4\u56f2\u5185\u306b\u3042\u308b\u304b\u3069\u3046\u304b\u8abf\u3079\u305f\u3044\u3002\u307e\u305f\u3001\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u3084\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u30a2\u30c9\u30ec\u30b9\u306a\u3069\u306e\u7b97\u51fa\u3084\u691c\u8a3c\u3082\u4f75\u305b\u3066\u884c\u3044\u305f\u3044\u3001\u4f55\u304b\u826f\u3044\u65b9\u6cd5\u306f\u306a\u3044\u304b\u8abf\u3079\u308b<\/p>\n

\u3084\u3063\u3066\u307f\u305f\u4e8b<\/h1>\n

IP\u30a2\u30c9\u30ec\u30b9\u3092\u6574\u6570(32bit unsigned int)0 \uff5e 4,294,967,295)\u306b\u5909\u63db\u3057\u3066\u5024\u306e\u7bc4\u56f2\u3092\u8abf\u3079\u308b<\/span><\/p>\n

\u304d\u3063\u304b\u3051<\/h1>\n

\u758e\u901a\u78ba\u8a8d\u306a\u3069\u3067\u3088\u304f\u4f7f\u3046ping\u30b3\u30de\u30f3\u30c9\u3067\u3059\u304c\u3001<\/p>\n

ping [IP\u30a2\u30c9\u30ec\u30b9]<\/blockquote>\n

\u306e\u3088\u3046\u306b\u4f7f\u3044\u307e\u3059\u304c\u3001\u79c1\u306f\u3042\u308b\u65e5\u8aa4\u3063\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5165\u529b\u3057\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002<\/p>\n

ping [\u6b63\u306e\u6574\u6570]<\/blockquote>\n

\u7d50\u679c\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\n
C:\\Users\\tanaka>ping 8.8.8.8\n\n8.8.8.8 \u306b ping \u3092\u9001\u4fe1\u3057\u3066\u3044\u307e\u3059 32 \u30d0\u30a4\u30c8\u306e\u30c7\u30fc\u30bf:\n8.8.8.8 \u304b\u3089\u306e\u5fdc\u7b54: \u30d0\u30a4\u30c8\u6570 =32 \u6642\u9593 =3ms TTL=59\n8.8.8.8 \u304b\u3089\u306e\u5fdc\u7b54: \u30d0\u30a4\u30c8\u6570 =32 \u6642\u9593 =3ms TTL=59\n8.8.8.8 \u304b\u3089\u306e\u5fdc\u7b54: \u30d0\u30a4\u30c8\u6570 =32 \u6642\u9593 =3ms TTL=59\n8.8.8.8 \u304b\u3089\u306e\u5fdc\u7b54: \u30d0\u30a4\u30c8\u6570 =32 \u6642\u9593 =3ms TTL=59\n\n8.8.8.8 \u306e ping \u7d71\u8a08:\n\u00a0\u00a0\u00a0 \u30d1\u30b1\u30c3\u30c8\u6570: \u9001\u4fe1 = 4\u3001\u53d7\u4fe1 = 4\u3001\u640d\u5931 = 0 (0% \u306e\u640d\u5931)\u3001\n\u30e9\u30a6\u30f3\u30c9 \u30c8\u30ea\u30c3\u30d7\u306e\u6982\u7b97\u6642\u9593 (\u30df\u30ea\u79d2):\n\u00a0\u00a0\u00a0 \u6700\u5c0f = 3ms\u3001\u6700\u5927 = 3ms\u3001\u5e73\u5747 = 3ms\n\nC:\\Users\\tanaka>ping 123456789\n\n7.91.205.21 \u306b ping \u3092\u9001\u4fe1\u3057\u3066\u3044\u307e\u3059 32 \u30d0\u30a4\u30c8\u306e\u30c7\u30fc\u30bf:\nCtrl+C\n^C<\/pre>\n<\/blockquote>\n
10\u9032\u6570\u30c9\u30c3\u30c8\u533a\u5207\u308a\u306eIP\u30a2\u30c9\u30ec\u30b9\u4ee5\u5916\u3092\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u4e0e\u3048\u3066\u3082\u30a8\u30e9\u30fc\u306b\u306f\u306a\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u4e0a\u8a18\u306fWindows\u306eping\u30b3\u30de\u30f3\u30c9\u306e\u7d50\u679c\u3067\u3059\u304c\u3001Linux\u306a\u3069\u306eping\u30b3\u30de\u30f3\u30c9\u3067\u3082\u540c\u69d8\u306e\u7d50\u679c\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u4ee5\u4e0a\u306e\u3053\u3068\u304b\u3089\u3001ping\u30b3\u30de\u30f3\u30c9\u306f32bit\u306eIP\u30a2\u30c9\u30ec\u30b9\u309210\u9032\u6570\u3068\u3057\u3066\u89e3\u91c8\u3057\u3066\u51e6\u7406\u3057\u3066\u3044\u308b\u306e\u3067\u306f\u306a\u3044\u304b\u3068\u8003\u3048\u3001\u81ea\u5206\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3084\u30b9\u30af\u30ea\u30d7\u30c8\u306b\u3082\u5fdc\u7528\u3067\u304d\u308b\u306e\u3067\u306f\u306a\u3044\u304b\u3068\u8003\u3048\u307e\u3057\u305f\u3002<\/p>\n
IP\u30a2\u30c9\u30ec\u30b9\u309210\u9032\u657032bit unsigned int\u306b\u5909\u63db\u3057\u3066ping\u306b\u4e0e\u3048\u3066\u307f\u305f<\/h1>\n
\u305d\u308c\u3067\u306f\u3001Google Public DNS\u306e\"8.8.8.8\"\u309210\u9032\u6570\u306e32\u30d3\u30c3\u30c8\u306e\u7b26\u53f7\u306a\u3057\u6574\u6570\u306b\u5909\u3048\u3066ping\u306b\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u4e0e\u3048\u3066\u307f\u307e\u3059\u3002<\/p>\n
10\u9032\u6570\u306eint\u578b0\u309232bit\u3067\u8868\u3059\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
0000 0000 0000 0000 0000 0000 0000 0000<\/pre>\n
10\u9032\u6570\u306eint\u578b8\u30922\u9032\u6570\u3067\u8868\u3059\u30681000\u306a\u306e\u3067\"8.8.8.8\"\u306f\u4ee5\u4e0b\u3067\u3042\u308b\u3068\u8003\u3048\u307e\u3057\u305f\u3002<\/p>\n
0000 1000 0000 1000 0000 1000 0000 1000<\/pre>\n
\u3053\u308c\u309210\u9032\u6570\u306b\u76f4\u3057\u307e\u3059\u3002<\/p>\n
2^27 + 2^19 + 2^11 + 2^3
\n= 134217728 + 524288 + 2048 + 8
\n= 134744072<\/p>\n
\u3053\u308c\u3092ping\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u4e0e\u3048\u3066\u307f\u307e\u3059\u3002<\/p>\n
\n
C:\\Users\\tanaka>ping 134744072\n\n8.8.8.8 \u306b ping \u3092\u9001\u4fe1\u3057\u3066\u3044\u307e\u3059 32 \u30d0\u30a4\u30c8\u306e\u30c7\u30fc\u30bf:\n8.8.8.8 \u304b\u3089\u306e\u5fdc\u7b54: \u30d0\u30a4\u30c8\u6570 =32 \u6642\u9593 =4ms TTL=59\n8.8.8.8 \u304b\u3089\u306e\u5fdc\u7b54: \u30d0\u30a4\u30c8\u6570 =32 \u6642\u9593 =3ms TTL=59\n8.8.8.8 \u304b\u3089\u306e\u5fdc\u7b54: \u30d0\u30a4\u30c8\u6570 =32 \u6642\u9593 =3ms TTL=59\n8.8.8.8 \u304b\u3089\u306e\u5fdc\u7b54: \u30d0\u30a4\u30c8\u6570 =32 \u6642\u9593 =3ms TTL=59\n\n8.8.8.8 \u306e ping \u7d71\u8a08:\n\u00a0\u00a0\u00a0 \u30d1\u30b1\u30c3\u30c8\u6570: \u9001\u4fe1 = 4\u3001\u53d7\u4fe1 = 4\u3001\u640d\u5931 = 0 (0% \u306e\u640d\u5931)\u3001\n\u30e9\u30a6\u30f3\u30c9 \u30c8\u30ea\u30c3\u30d7\u306e\u6982\u7b97\u6642\u9593 (\u30df\u30ea\u79d2):\n\u00a0\u00a0\u00a0 \u6700\u5c0f = 3ms\u3001\u6700\u5927 = 4ms\u3001\u5e73\u5747 = 3ms<\/pre>\n<\/blockquote>\n
\u4e88\u60f3\u901a\u308a\u306e\u7d50\u679c\u3068\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n
IP\u30a2\u30c9\u30ec\u30b9\u309210\u9032\u657032bit unsigned int\u306b\u5909\u63db\u3057\u3066\u51e6\u7406\u3057\u3066\u307f\u305f<\/h1>\n
ping\u30b3\u30de\u30f3\u30c9\u3092\u771f\u4f3c\u3066IP\u30a2\u30c9\u30ec\u30b9\u309232bit unsigned int\u3068\u3057\u3066\u6271\u3044\u3001TCP\/IP\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u60c5\u5831\u3092\u7b97\u51fa\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n
IP\u30a2\u30c9\u30ec\u30b9\u309232bit\u5024\u306b\u5909\u63db<\/h4>\n
IP\u30a2\u30c9\u30ec\u30b9<\/a>\u306e\u5404\u30aa\u30af\u30c6\u30c3\u30c8(8bit)\u3092int\u578b\u306e\u6570\u5b57\u3068\u898b\u306a\u3057\u30014\u3064\u4e26\u3079\u307e\u3059\u3002<\/p>\n
0000 0000 0000 0000 0000 0000 0000 1000 \/\/ 8\n0000 0000 0000 0000 0000 0000 0000 1000 \/\/ 8\n0000 0000 0000 0000 0000 0000 0000 1000 \/\/ 8\n0000 0000 0000 0000 0000 0000 0000 1000 \/\/ 8<\/pre>\n
\u3053\u308c\u3092\u7b2c\u4e00\u30aa\u30af\u30c6\u30c3\u30c8\u304b\u3089\u9806\u306b\u300124\u30d3\u30c3\u30c8\u5de6\u30b7\u30d5\u30c8\u3001\u7b2c\u4e8c\u30aa\u30af\u30c6\u30c3\u30c8\u309216\u30d3\u30c3\u30c8\u5de6\u30b7\u30d5\u30c8\u3001\u7b2c\u4e09\u30aa\u30af\u30c6\u30c3\u30c8\u30928\u30d3\u30c3\u30c8\u5de6\u30b7\u30d5\u30c8\u3057\u3066OR\u3092\u3068\u308a\u307e\u3059\u3002<\/p>\n
0000 1000 0000 0000 0000 0000 0000 0000\n0000 0000 0000 1000 0000 0000 0000 0000\n0000 0000 0000 0000 0000 1000 0000 0000\n0000 0000 0000 0000 0000 0000 0000 1000\n==================================\u00a0\u00a0\u00a0 [OR]\n0000 1000 0000 1000 0000 1000 0000 1000 => 134744072<\/pre>\n<\/blockquote>\n
IP\u30a2\u30c9\u30ec\u30b9\u304c\u6b63\u3057\u3044\u304b\u3069\u3046\u304b<\/h4>\n
10\u9032\u6570\u306b\u5909\u63db\u3057\u305fIP\u30a2\u30c9\u30ec\u30b9\u306e\u7bc4\u56f2\u304c0\uff5e4294967295\u306e\u7bc4\u56f2\u306b\u542b\u307e\u308c\u308b\u304b\u3069\u3046\u304b<\/span><\/p><\/blockquote>\n
CIDR(\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u9577)\u309232bitIP\u30a2\u30c9\u30ec\u30b9\u306b\u3059\u308b<\/h4>\n
2^((32 - \u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u9577) - 1)\u30922\u9032\u6570\u306b\u3057\u305f\u3082\u306e\u3068\u30010xFFFFFFFF\u3067XOR\u3092\u3068\u308b
\n<\/span><\/p>\n
\u4f8b: 24<\/p>\n
0000 0000  0000 0000  0000 0000  1111 1111\n1111 1111  1111 1111  1111 1111  1111 1111\n=================================== [XOR]\n1111 1111  1111 1111  1111 1111  0000 0000 => 255.255.255.0<\/pre>\n<\/blockquote>\n
\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u3092\u6c42\u3081\u308b<\/h4>\n
2\u9032\u6570\u306b\u5909\u63db\u3057\u305fIP\u30a2\u30c9\u30ec\u30b9\u3068\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u9577\u4ed8\u304d\u30a2\u30c9\u30ec\u30b9(CIDR)\u30922\u9032\u6570\u306b\u3057\u305f\u3082\u306e\u306eAND\u3092\u3068\u308b(\u30db\u30b9\u30c8\u90e8\u306e\u30d3\u30c3\u30c8\u3092\u3059\u3079\u30660\u306b\u3059\u308b)<\/p>\n
\u4f8b: 192.168.0.1 , \u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af255.255.255.0(192.168.0.1\/24)<\/p>\n
1100\u00a00000\u00a0\u00a01010\u00a01000\u00a0\u00a00000\u00a00000\u00a0\u00a00000\u00a00001\n1111 1111\u00a0 1111 1111\u00a0 1111 1111\u00a0 0000 0000\n=================================== [AND]\n1100\u00a00000\u00a0 1010 1000\u00a0\u00a00000\u00a00000\u00a0\u00a00000 0000 => 192.168.0.0<\/pre>\n<\/blockquote>\n
\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u30a2\u30c9\u30ec\u30b9\u3092\u6c42\u3081\u308b<\/h4>\n
\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u9577\u4ed8\u304d\u30a2\u30c9\u30ec\u30b9(CIDR)\u3092\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u3092\u8ad6\u7406\u5426\u5b9a(NOT)\u3057\u305f\u3082\u306e\u3068XOR\u3092\u3068\u308b(\u30db\u30b9\u30c8\u90e8\u306e\u30d3\u30c3\u30c8\u3092\u3059\u3079\u30661\u306b\u3059\u308b)<\/p>\n
\u4f8b: 192.168.0.1, \u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af255.255.255.0(192.168.0.1\/24)<\/p>\n
1100 0000\u00a0 1010 1000\u00a0 0000 0000\u00a0 0000 0000\n=================================== [NOT]\n0011 1111\u00a0 0101 0111\u00a0 1111 1111\u00a0 1111 1111\n1111 1111\u00a0 1111 1111\u00a0 1111 1111\u00a0 0000 0000\n=================================== [XOR]\n1100 0000\u00a0 1010 1000\u00a0 0000 0000\u00a0 1111 1111 => 192.168.0.255\n<\/pre>\n
bash\u306a\u3069NOT\u6f14\u7b97\u304c\u3067\u304d\u306a\u3044\u5834\u5408\u306f\u4ee5\u4e0b\u3067\u4ee3\u7528\u3059\u308b(\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u9577\u4ed8\u304d\u30a2\u30c9\u30ec\u30b9(CIDR)\u30680xFFFFFFFF\u3067XOR\u3092\u3068\u3063\u305f\u3082\u306e\u3068IP\u30a2\u30c9\u30ec\u30b9\u3067OR\u3092\u3068\u308b)<\/p>\n
1111 1111\u00a0 1111 1111\u00a0 1111 1111\u00a0 0000 0000\n1111 1111\u00a0 1111 1111\u00a0 1111 1111\u00a0 1111 1111\n=================================== [XOR]\n0000 0000\u00a0 0000 0000\u00a0 0000 0000\u00a0 1111 1111\n1100 0000\u00a0 1010 1000\u00a0 0000 0000\u00a0 0000 0001\n=================================== [OR]\n1100 0000\u00a0 1010 1000\u00a0 0000 0000\u00a0 1111 1111 => 192.168.0.255<\/span><\/pre>\n<\/blockquote>\n
\u9023\u7d9a\u3057\u305fIP\u30a2\u30c9\u30ec\u30b9\u3092\u6c42\u3081\u308b<\/h4>\n
IP\u30a2\u30c9\u30ec\u30b9\u309232bit unsigned int\u306b\u3057\u3066\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\u3059\u308b\u3060\u3051\u3001\u30aa\u30af\u30c6\u30c3\u30c8\u5883\u754c\u306f\u8003\u3048\u308b\u5fc5\u8981\u306a\u3057<\/p><\/blockquote>\n
\u3042\u308bIP \u30a2\u30c9\u30ec\u30b9\u304c\u7279\u5b9a\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u7bc4\u56f2\u306b\u3042\u308b\u304b\u8abf\u3079\u308b<\/h4>\n
IP\u30a2\u30c9\u30ec\u30b9\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u3068\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u30a2\u30c9\u30ec\u30b9\u306e\u9593\u306b\u3042\u308b\u304b\u8abf\u3079\u308c\u3070\u3088\u3044<\/p>\n
\u4f8b: 192.168.0.200\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af255.255.255.0\u3067192.168.0.1\u306e\u7bc4\u56f2\u306b\u6240\u5c5e\u3059\u308b\u304b<\/p>\n
192.168.0.255 => 3232235775
\n192.168.0.1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 => 3232235521
\n192.168.0.200 => 3232235720<\/p>\n
3232235521 < 3232235720 < 3232235775 \u3088\u3063\u3066\u6240\u5c5e\u3059\u308b<\/p><\/blockquote>\n
\u5b9f\u969b\u306e\u30b3\u30fc\u30c9\u4f8b<\/h1>\n
#!\/bin\/bash\n\n# IP\u30a2\u30c9\u30ec\u30b9\u8868\u8a18 -> 32bit\u5024 \u306b\u5909\u63db\nfunction ip2decimal(){\n    local IFS=.\n    local c=($1)\n    printf \"%s\\n\" $(( (${c[0]} << 24) | (${c[1]} << 16) | (${c[2]} << 8) | ${c[3]} ))\n}\n\n# 32bit\u5024 -> IP\u30a2\u30c9\u30ec\u30b9\u8868\u8a18 \u306b\u5909\u63db\nfunction decimal2ip(){\n    local n=$1\n    printf \"%d.%d.%d.%d\\n\" $(($n >> 24)) $(( ($n >> 16) & 0xFF)) $(( ($n >> 8) & 0xFF)) $(($n & 0xFF))\n}\n\n# CIDR \u8868\u8a18\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u3092 32bit\u5024\u306b\u5909\u63db\nfunction cidr2decimal(){\n    printf \"%s\\n\" $(( 0xFFFFFFFF ^ ((2 ** (32-$1))-1) ))\n}\n\n# \u6307\u5b9a\u3055\u308c\u305f\u500b\u6570\u3060\u3051\u9023\u7d9a\u3057\u305fIP\u30a2\u30c9\u30ec\u30b9\u306e\u4e00\u89a7\u3092\u8868\u793a\nfunction<\/span> iplist(){<\/span>\n    local <\/span>num<\/span>=<\/span>$(<\/span>ip2decimal $1<\/span>)<\/span>\n    local <\/span>max<\/span>=<\/span>$((<\/span>$num<\/span> +<\/span> $2<\/span> -<\/span> 1<\/span>))<\/span>\n\n    while<\/span> :\n    do<\/span>\n        decimal2ip $num<\/span>\n        [[<\/span> $num<\/span> ==<\/span> $max<\/span> ]]<\/span> &&<\/span> break<\/span> ||<\/span> num<\/span>=<\/span>$((<\/span>$num<\/span>+<\/span>1<\/span>))<\/span>\n    done<\/span>\n}\n\n# \u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u7279\u5b9a\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u542b\u307e\u308c\u308b\u304b\u8abf\u3079\u308b\n<\/span>function<\/span> ipwith(){<\/span>\n   local <\/span>addr<\/span>=<\/span>$1<\/span>\n   local <\/span>mask<\/span>=<\/span>$2<\/span>\n\n   local <\/span>num<\/span>=<\/span>$(<\/span>ip2decimal $3<\/span>)<\/span>\n   local <\/span>net<\/span>=<\/span>$((<\/span> $(<\/span>ip2decimal $addr<\/span>)<\/span> &<\/span> $(<\/span>ip2decimal $mask<\/span>)<\/span> ))<\/span>\n   local <\/span>brd<\/span>=<\/span>$((<\/span> $(<\/span>ip2decimal $addr<\/span>)<\/span> |<\/span> (<\/span>0<\/span>xFFFFFFFF ^<\/span> $(<\/span>ip2decimal $mask<\/span>)<\/span>)<\/span> ))<\/span>\n\n   [<\/span> $net<\/span> -le $num<\/span> -a $num<\/span> -le $brd<\/span> ]<\/span> &&<\/span> return<\/span> 0<\/span> ||<\/span> return<\/span> 1\n}<\/span><\/pre>\n
\u5b9f\u884c\u4f8b<\/h1>\n
\n
# IP\u30a2\u30c9\u30ec\u30b9\u309232bit\u5024\u306b\u5909\u63db\n$ ip2decimal 192.168.0.1\n3232235521\n\n# 32bit\u5024\u3092IP\u30a2\u30c9\u30ec\u30b9\u306b\u5909\u63db\n$ decimal2ip 3232235521\n192.168.0.1\n\n# CIDR\u8868\u8a18\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u309232bit\u5024\u306b\u5909\u63db\n$ cidr2decimal 24\n4294967040\n\n# \u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u3092\u6c42\u3081\u308b\n$ IP=192.168.0.1\n$ CIDR=24\n$ decimal2ip $(( $(ip2decimal $IP) & $(cidr2decimal $CIDR) ))\n192.168.0.0\n\n# \u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\u306e\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u30a2\u30c9\u30ec\u30b9\u3092\u6c42\u3081\u308b\n$ MASK=255.255.255.0\n$ decimal2ip $(( $(ip2decimal $IP) | (0xFFFFFFFF ^ $(ip2decimal $MASK)) ))\n192.168.0.255\n\n# \u6307\u5b9a\u3055\u308c\u305f\u6570\u3060\u3051\u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\u3068\u9023\u7d9a\u3057\u305fIP\u30a2\u30c9\u30ec\u30b9\u3092\u6c42\u3081\u308b\n$ iplist 192.168.0.253 5<\/span>\n192.168.0.253<\/span>\n192.168.0.254<\/span>\n192.168.0.255<\/span>\n192.168.1.0<\/span>\n192.168.1.1\n\n# \u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u7279\u5b9a\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u542b\u307e\u308c\u308b\u304b\u8abf\u3079\u308b\n$ ipwith 192.168.0.1 255.255.255.0 192.168.0.200<\/span>\n$ echo $?<\/span>\n0\n\n# \u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u7279\u5b9a\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u542b\u307e\u308c\u308b\u304b\u8abf\u3079\u308b\n$ ipwith 192.168.0.1 $(decimal2ip $(cidr2decimal 24)) 192.168.1.200<\/span>\n$ echo $?<\/span>\n1\n<\/span><\/pre>\n<\/blockquote>\n
<\/h1>\n
IP\u30a2\u30c9\u30ec\u30b9\u309210\u9032\u657032bit unsigned int\u3068\u3057\u3066IP\u30a2\u30c9\u30ec\u30b9\u306e\u7bc4\u56f2\u3092\u8abf\u3079\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\uff01<\/p>\n
ping\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3092\u8aad\u3093\u3067\u307f\u305f<\/h1>\n
Linux\u306eping\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u304c\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u306e\u3067FreeBSD\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3092\u8aad\u3093\u3067\u307f\u307e\u3059\u3002<\/p>\n
https:\/\/svnweb.freebsd.org\/base\/head\/sbin\/ping\/ping.c<\/a><\/p>\n
\n
553 target = argv[optind]; \/\/ \u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u6e21\u3055\u308c\u305f\u5024\u3092\u8aad\u3093\u3067\u3044\u308b\n.\n.\n.\n\/* to->sin_addr\u306btarget\u306e\u5024\u3092network byte order\u5f62\u5f0f\u3067\u5165\u308c\u308b\u3002\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u5024\u304cIP\u30a2\u30c9\u30ec\u30b9\u3068\u3057\u3066\u89e3\u91c8\u3067\u304d\u308b\u304b\u3069\u3046\u304b *\/\n606 if (inet_aton(target, &to->sin_addr) != 0) {\n607         hostname = target; \/\/ \u89e3\u91c8\u3067\u304d\u308b(32bit10\u9032\u6570\u5024\u306e\u5834\u5408\u3082\u3053\u3053\u3092\u901a\u308b)\n608 }\n.\n.\n.\n841 (void)printf(\"PING %s (%s)\", hostname, inet_ntoa(to->sin_addr)); \/\/ PING 134744072 (8.8.8.8)...\u3068\u8868\u793a\u3057\u3066\u3044\u308b<\/pre>\n<\/blockquote>\n
inet_ntoa()\u3068inet_aton()\u304c32bit\u6570\u5024\u3068ASCII\u6587\u5b57\u5217(10\u9032\u6570\u30c9\u30c3\u30c8\u533a\u5207\u308aIP\u30a2\u30c9\u30ec\u30b9)\u306e\u5909\u63db\u3092\u3057\u3066\u3044\u305d\u3046\u3067\u3059\u3002<\/p>\n
\u30aa\u30f3\u30e9\u30a4\u30f3\u30de\u30cb\u30e5\u30a2\u30eb\u306einet(3)\u306b\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n
\n
inet_aton<\/b>() converts the Internet host address cp<\/i> from the IPv4\n       numbers-and-dots notation into binary form (in network byte order)\n       and stores it in the structure that inp<\/i> points to.  inet_aton<\/b>()\n       returns nonzero if the address is valid, zero if not.\n.\n.\n.<\/pre>\n<\/blockquote>\n
\u30de\u30cb\u30e5\u30a2\u30eb\u306b\u3088\u308b\u306816\u9032\u6570\u3067\u3082\u89e3\u91c8\u3067\u304d\u308b\u3068\u306e\u3053\u3068\u306a\u306e\u3067\u3084\u3063\u3066\u307f\u307e\u3059\u3002<\/p>\n
C:\\Users\\tanaka>ping 0x08080808\n\n8.8.8.8 \u306b ping \u3092\u9001\u4fe1\u3057\u3066\u3044\u307e\u3059 32 \u30d0\u30a4\u30c8\u306e\u30c7\u30fc\u30bf:\n8.8.8.8 \u304b\u3089\u306e\u5fdc\u7b54: \u30d0\u30a4\u30c8\u6570 =32 \u6642\u9593 =3ms TTL=59\n8.8.8.8 \u304b\u3089\u306e\u5fdc\u7b54: \u30d0\u30a4\u30c8\u6570 =32 \u6642\u9593 =3ms TTL=59\n8.8.8.8 \u304b\u3089\u306e\u5fdc\u7b54: \u30d0\u30a4\u30c8\u6570 =32 \u6642\u9593 =3ms TTL=59\n8.8.8.8 \u304b\u3089\u306e\u5fdc\u7b54: \u30d0\u30a4\u30c8\u6570 =32 \u6642\u9593 =4ms TTL=59\n\n8.8.8.8 \u306e ping \u7d71\u8a08:\n \u30d1\u30b1\u30c3\u30c8\u6570: \u9001\u4fe1 = 4\u3001\u53d7\u4fe1 = 4\u3001\u640d\u5931 = 0 (0% \u306e\u640d\u5931)\u3001\n\u30e9\u30a6\u30f3\u30c9 \u30c8\u30ea\u30c3\u30d7\u306e\u6982\u7b97\u6642\u9593 (\u30df\u30ea\u79d2):\n \u6700\u5c0f = 3ms\u3001\u6700\u5927 = 4ms\u3001\u5e73\u5747 = 3ms\n\nC:\\Users\\tanaka>ping 0x08.0x08.0x08.0x08\n\n8.8.8.8 \u306b ping \u3092\u9001\u4fe1\u3057\u3066\u3044\u307e\u3059 32 \u30d0\u30a4\u30c8\u306e\u30c7\u30fc\u30bf:\n8.8.8.8 \u304b\u3089\u306e\u5fdc\u7b54: \u30d0\u30a4\u30c8\u6570 =32 \u6642\u9593 =8ms TTL=59\n8.8.8.8 \u304b\u3089\u306e\u5fdc\u7b54: \u30d0\u30a4\u30c8\u6570 =32 \u6642\u9593 =5ms TTL=59\n8.8.8.8 \u304b\u3089\u306e\u5fdc\u7b54: \u30d0\u30a4\u30c8\u6570 =32 \u6642\u9593 =8ms TTL=59\n8.8.8.8 \u304b\u3089\u306e\u5fdc\u7b54: \u30d0\u30a4\u30c8\u6570 =32 \u6642\u9593 =8ms TTL=59\n\n8.8.8.8 \u306e ping \u7d71\u8a08:\n \u30d1\u30b1\u30c3\u30c8\u6570: \u9001\u4fe1 = 4\u3001\u53d7\u4fe1 = 4\u3001\u640d\u5931 = 0 (0% \u306e\u640d\u5931)\u3001\n\u30e9\u30a6\u30f3\u30c9 \u30c8\u30ea\u30c3\u30d7\u306e\u6982\u7b97\u6642\u9593 (\u30df\u30ea\u79d2):\n \u6700\u5c0f = 5ms\u3001\u6700\u5927 = 8ms\u3001\u5e73\u5747 = 7ms<\/pre>\n
<\/h1>\n
16\u9032\u6570\u3067\u3082\u3067\u304d\u307e\u3057\u305f\uff01<\/p>\n
\u53c2\u8003\u306b\u3055\u305b\u3066\u3044\u305f\u3060\u3044\u305f\u30b5\u30a4\u30c8\u69d8(TCP\/IP\u60c5\u5831\u53d6\u5f97\u30b7\u30a7\u30eb\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u305d\u306e\u307e\u307e\u4f7f\u308f\u305b\u3066\u9802\u3044\u3066\u3044\u307e\u3059)<\/h1>\n
http:\/\/qiita.com\/harasou\/items\/5c14c335388f70e178f5<\/a><\/span><\/p>\n
\u8a18\u4e8b\u306f\u4ee5\u4e0a\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u3053\u306e\u305f\u3073\u306f\u3054\u89a7\u6234\u304d\u3001\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3057\u305f\u3002<\/p>\n
 <\/p>\n","protected":false},"excerpt":{"rendered":"
\u3053\u3093\u306b\u3061\u306f\u3001\u5e45\u5e83\u3044\u8996\u91ce\u3092\u6301\u3064\u30a8\u30f3\u30b8\u30cb\u30a2\u3092\u76ee\u6307\u3057\u3066\u3044\u307e\u3059\u7530\u4e2d\u3068\u7533\u3057\u307e\u3059\u3002 \u4eca\u65e5\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u306e\u6271\u3044\u65b9\u3092\u898b\u3066\u3044\u304d\u307e\u3059\u3002 \u76ee\u7684 \u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u3001\u7279\u5b9a\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u7bc4\u56f2\u5185\u306b\u3042\u308b\u304b\u3069\u3046\u304b\u8abf\u3079\u305f\u3044\u3002\u307e\u305f\u3001\u30b5\u30d6\u30cd\u30c3\u30c8\u30de…<\/p>\n","protected":false},"author":1,"featured_media":7476,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_locale":"ja","_original_post":"7423","footnotes":""},"categories":[29,18,30],"tags":[148,147,156,104,146,144,36,151,145,158,157,153,154,152,155,149,150],"class_list":{"0":"post-7423","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-linux","8":"category-os","9":"category-windows","10":"tag-bash","11":"tag-ip","12":"tag-it","13":"tag-linux","14":"tag-ping","15":"tag-tcpip","16":"tag-tips","17":"tag-151","18":"tag-145","19":"tag-158","20":"tag-157","21":"tag-153","22":"tag-154","23":"tag-152","24":"tag-155","25":"tag-149","26":"tag-150","27":"ja"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/posts\/7423","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/comments?post=7423"}],"version-history":[{"count":19,"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/posts\/7423\/revisions"}],"predecessor-version":[{"id":7543,"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/posts\/7423\/revisions\/7543"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/media\/7476"}],"wp:attachment":[{"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/media?parent=7423"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/categories?post=7423"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/tags?post=7423"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}