{"id":13977,"date":"2015-06-09T13:39:38","date_gmt":"2015-06-09T04:39:38","guid":{"rendered":"http:\/\/labs.gree.jp\/blog\/?p=13977"},"modified":"2015-06-09T13:51:57","modified_gmt":"2015-06-09T04:51:57","slug":"%e5%ae%9f%e3%82%b5%e3%83%bc%e3%83%93%e3%82%b9%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bhttp2%e3%83%8d%e3%82%b4%e3%82%b7%e3%82%a8%e3%83%bc%e3%82%b7%e3%83%a7%e3%83%b3%e6%95%b0%e3%82%92%e8%aa%bf%e3%81%b9","status":"publish","type":"post","link":"https:\/\/labs.gree.jp\/blog\/2015\/06\/13977\/","title":{"rendered":"\u5b9f\u30b5\u30fc\u30d3\u30b9\u306b\u304a\u3051\u308bHTTP\/2\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u6570\u3092\u8abf\u3079\u308b"},"content":{"rendered":"

\u3053\u3093\u306b\u3061\u306f\u3001\u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u672c\u90e8\u306e\u5f8c\u85e4\u3067\u3059\u3002<\/p>\n

\u5148\u65e5\u3001HTTP\/2\u304cRFC7540<\/a>\u3068\u3057\u3066RFC\u5316\u3055\u308c\u307e\u3057\u305f\u3002RFC\u306e\u4e2d\u3067\u3082\u89e6\u308c\u3089\u308c\u3066\u3044\u308b\u901a\u308a\u3001\u65e5\u672c\u306e\u65b9\u3082\u6ca2\u5c71\u95a2\u4e0e\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u672c\u5f53\u306b\u7686\u69d8\u304a\u75b2\u308c\u69d8\u3067\u3057\u305f\u3002<\/p>\n

\u4ed5\u69d8\u3068\u3057\u3066\u306f\u4e00\u6bb5\u843d\u3057\u305fHTTP\/2\u3067\u3059\u304c\u3001\u5b9f\u969b\u306b\u4f7f\u3063\u3066\u3044\u304f\u6bb5\u968e\u3078\u3068\u79fb\u3063\u3066\u304f\u4e0a\u3067\u6c17\u306b\u306a\u308b\u306e\u304c\u3069\u308c\u4f4d\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304cHTTP\/2\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u304b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002Google Chrome\u3084Firefox\u306e\u6700\u65b0\u7248\u3067\u306f\u65e2\u306bHTTP\/2\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u5168\u3066\u306e\u30e6\u30fc\u30b6\u304c\u305d\u308c\u3092\u4f7f\u3063\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n

\u305d\u3053\u3067\u3001\u4eca\u56de\u306f\u5b9f\u969b\u306b\u5f0a\u793e\u306e\u30b5\u30fc\u30d3\u30b9\u3067HTTP\/2\u5bfe\u5fdc\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u63a5\u7d9a\u304c\u3069\u308c\u7a0b\u3042\u308b\u306e\u304b\u8abf\u3079\u3066\u307f\u307e\u3057\u305f\u3002(HTTP\/2\u3092\u30b5\u30fc\u30d3\u30b9\u3068\u3057\u3066\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002)<\/p>\n

\u30e6\u30fc\u30b6\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u304b\u3089\u8abf\u3079\u308b\u65b9\u6cd5\u3082\u3042\u308b\u306e\u3067\u3059\u304c\u3001\u4eca\u56de\u306fALPN\u3092\u5143\u306b\u8abf\u3079\u307e\u3057\u305f\u3002<\/p>\n

 <\/p>\n

ALPN\u306b\u3064\u3044\u3066<\/h2>\n

HTTP\/2\u3067\u901a\u4fe1\u3059\u308b\u969b\u306e\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u65b9\u6cd5\u306b\u306f\u5e7e\u3064\u304b\u3042\u308a\u3001ALPN<\/em>(Application Layer Protocol Negotiation)<\/a>\u3092\u4f7f\u3046\u65b9\u6cd5\u3084\u3001HTTP\/1.1\u304b\u3089\u306e\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

ALPN\u306fTLS\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u4e2d\u306b\u4f7f\u7528\u3059\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3042\u308a\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u5074\u304b\u3089ClientHello\u3092\u9001\u4fe1\u3059\u308b\u969b\u306b\u4f7f\u7528\u3059\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u30ea\u30b9\u30c8\u3092\u63d0\u793a\u3057\u307e\u3059\u3002<\/p>\n

\u4f8b\u3048\u3070Google Chrome\u306a\u3069\u3067\u306f\u4ee5\u4e0b\u306e\u69d8\u306a\u30ea\u30b9\u30c8\u3092ClientHello\u3092\u9001\u4fe1\u3059\u308b\u969b\u306b\u9001\u4fe1\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

http\/1.1,spdy\/3.1,h2-14,h2\n<\/pre>\n
h2\u3068\u3044\u3046\u8b58\u5225\u5b50\u304cHTTP\/2\u3092\u793a\u3059\u8b58\u5225\u5b50\u306b\u306a\u308a\u307e\u3059\u3002h2-14\u3068\u8a00\u3063\u305f\u30cf\u30a4\u30d5\u30f3\u4ed8\u304d\u306e\u8b58\u5225\u5b50\u306f\u3001\u30c9\u30e9\u30d5\u30c8\u5b9f\u88c5\u3092\u793a\u3059\u3082\u306e\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u30b5\u30fc\u30d0\u306fALPN\u3067\u30ea\u30b9\u30c8\u3092\u53d7\u3051\u53d6\u3063\u305f\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u4e2d\u304b\u3089\u4e00\u3064\u3092\u9078\u629e\u3057\u3001SeverHello\u3092\u9001\u4fe1\u3059\u308b\u969b\u306b\u9078\u629e\u3057\u305f\u30d7\u30ed\u30c8\u30b3\u30eb\u3092ALPN\u3067\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u63d0\u793a\u3057\u307e\u3059\u3002<\/p>\n
\u3053\u306e\u4e00\u9023\u306e\u6d41\u308c\u3092\u901a\u3057\u3066HTTP\/2\u3067\u901a\u4fe1\u3059\u308b\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u304c\u5b8c\u4e86\u3057\u307e\u3059\u3002<\/p>\n
 <\/p>\n
SPDY\u3067\u306f\u3001\u4f3c\u305f\u3088\u3046\u306a\u4ed5\u7d44\u307f\u3067\u3042\u308bNPN(Next Protocol Negotiation)\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3057\u305f\u3002ALPN\u3068\u306f\u9055\u3044\u30b5\u30fc\u30d0\u304b\u3089\u30d7\u30ed\u30c8\u30b3\u30eb\u30ea\u30b9\u30c8\u3092\u63d0\u793a\u3057\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u9078\u629e\u3059\u308b\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u3002\u3053\u306eNPN\u3067HTTP\/2\u3092\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u53ef\u80fd\u306a\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3082\u307e\u3060\u307e\u3060\u5b58\u5728\u306f\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
 <\/p>\n
\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3\u30fb\u30d1\u30fc\u30b9\u3059\u308b<\/h2>\n
tcpdump\u7b49\u3067TLS\u901a\u4fe1\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3057pcap\u30d5\u30a1\u30a4\u30eb\u3068\u3057\u3066\u4fdd\u5b58\u3057\u307e\u3059\u3001\u4fdd\u5b58\u3057\u305f\u30d1\u30b1\u30c3\u30c8\u3092tshark\u3067\u8a73\u7d30\u306b\u8868\u793a\u3057\u307e\u3059\u3002(\u4eca\u56de\u3001\u5b9f\u969b\u306b\u306fClientHello\u306e\u307f\u3092\u4fdd\u5b58\u3057\u3066\u5229\u7528\u3057\u307e\u3057\u305f\u3002)<\/p>\n
$ tcpdump -i eth1 port 443 -w out.pcap<\/pre>\n
$ tshark -r .\/out.pcap -V\n...(\u4e2d\u7565\nExtension: next_protocol_negotiation\n  Type: next_protocol_negotiation (0x3374)\n  Length: 0\nExtension: Application Layer Protocol Negotiation\n  Type: Application Layer Protocol Negotiation (0x0010)\n  Length: 26\n    ALPN Extension Length: 24\n    ALPN Protocol\n    ALPN string length: 8\n    ALPN Next Protocol: http\/1.1\n    ALPN string length: 8\n    ALPN Next Protocol: spdy\/3.1\n    ALPN string length: 5\n    ALPN Next Protocol: h2-14\n    ALPN string length: 2\n    ALPN Next Protocol: h2\n<\/pre>\n
\u6700\u65b0\u7248\u306etshark\u3067\u3042\u308c\u3070\u3001\u3053\u306e\u3088\u3046\u306bClietnHello\u306eALPN\u3092\u30d1\u30fc\u30b9\u3057\u3001\u8868\u793a\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002\u3042\u3068\u306f\u3001\u30b3\u30ec\u3092\u5143\u306b\u30ab\u30a6\u30f3\u30c8\u3059\u308b\u3060\u3051\u3067\u3069\u306e\u7a0b\u5ea6\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304cHTTP\/2\u3067\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u3057\u3066\u304d\u3066\u308b\u304b\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n
NPN\u306b\u3064\u3044\u3066\u306f\u3001ClientHello\u3067\u306fNPN\u306b\u5bfe\u5fdc\u3057\u3044\u308b\u4e8b\u3092\u793a\u3059\u306e\u307f\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u7d50\u679c<\/h2>\n
\u5f0a\u793e\u30b5\u30fc\u30d3\u30b9\u3067PC\u5411\u3051\u30b5\u30a4\u30c8\u306e\u30b5\u30fc\u30d0\u3092\u5bfe\u8c61\u306bClientHello\u30d1\u30b1\u30c3\u30c8\u306e\u4e00\u90e8\u3092\u53ce\u96c6\u3057\u6e2c\u5b9a\u3057\u307e\u3057\u305f\u3002\u540c\u4e00IP\u304b\u3089\u306eClientHello\u304c\u8907\u6570\u3042\u3063\u305f\u5834\u5408\u3067\u3082\u5225\u3005\u306b\u30ab\u30a6\u30f3\u30c8\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u7a2e\u5225<\/strong><\/td>\n\u30d1\u30b1\u30c3\u30c8\u6570<\/strong><\/td>\n\u5272\u5408<\/strong><\/td>\n<\/tr>\n
\u7dcf\u30d1\u30b1\u30c3\u30c8\u6570<\/td>\n5567<\/td>\n100<\/td>\n<\/tr>\n
ALPN\u4ed8\u304d<\/td>\n2952<\/td>\n53<\/td>\n<\/tr>\n
<\/td>\nh2<\/td>\n1092<\/td>\n19.6<\/td>\n<\/tr>\n
<\/td>\nh2-16<\/td>\n486<\/td>\n8.7<\/td>\n<\/tr>\n
<\/td>\nh2-15<\/td>\n486<\/td>\n8.7<\/td>\n<\/tr>\n
<\/td>\nh2-14<\/td>\n1180<\/td>\n21.2<\/td>\n<\/tr>\n
<\/td>\nspdy\/3.1<\/td>\n1450<\/td>\n26<\/td>\n<\/tr>\n
<\/td>\nspdy\/3<\/td>\n1762<\/td>\n31.7<\/td>\n<\/tr>\n
<\/td>\nspdy\/2<\/td>\n25<\/td>\n0.4<\/td>\n<\/tr>\n
<\/td>\nhttp\/1.1<\/td>\n2952<\/td>\n53<\/td>\n<\/tr>\n
NPN\u4ed8\u304d<\/td>\n3388<\/td>\n60.9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u5168\u4f53\u306e\u7d04\u534a\u6570\u3067ALPN\u304c\u4f7f\u308f\u308c\u3066\u304a\u308a\u3001h2\u304c\u4ed8\u3044\u3066\u3044\u308b\u3082\u306e\u306f\u305d\u306e\u4e2d\u3067\u308220%\u307b\u3069\u3068\u3044\u3046\u7d50\u679c\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n
 <\/p>\n
\u307e\u305fALPN\u3067\u63d0\u793a\u3055\u308c\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u30ea\u30b9\u30c8\u5225\u306e\u6570\u3067\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n
\u63d0\u793a\u30ea\u30b9\u30c8<\/strong><\/td>\n\u30d1\u30b1\u30c3\u30c8\u6570<\/strong><\/td>\n<\/tr>\n
spdy\/3, http\/1.1<\/td>\n1502<\/td>\n<\/tr>\n
h2-16, h2-15, h2-14, h2, spdy\/3.1, http\/1.1<\/td>\n486<\/td>\n<\/tr>\n
http\/1.1, spdy\/3.1, h2-14, h2<\/td>\n600<\/td>\n<\/tr>\n
spdy\/3, spdy\/3.1, http\/1.1<\/td>\n235<\/td>\n<\/tr>\n
http\/1.1, spdy\/3.1, h2-14<\/td>\n94<\/td>\n<\/tr>\n
spdy\/2, spdy\/3, spdy\/3.1, http\/1.1<\/td>\n25<\/td>\n<\/tr>\n
h2, spdy\/3.1, http\/1.1<\/td>\n6<\/td>\n<\/tr>\n
spdy\/3.1, http\/1.1<\/td>\n4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
<\/div>\n
\u3053\u308c\u3089\u306e\u7d50\u679c\u3088\u308a<\/div>\n
    \n
  • \u5168\u30d1\u30b1\u30c3\u30c8\u306e\u5185\n
      \n
    • 53%\u304cSPDY\/3\u7cfb(3 or 3.1)\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b(NPN\u306e\u307f\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3082\u3044\u308b\u306e\u3067\u5b9f\u969b\u306f\u3082\u3046\u5c11\u3057\u591a\u3044\u306f\u305a)<\/li>\n
    • 21%\u304c\u5b9f\u88c5\u30c9\u30e9\u30d5\u30c8\u3092\u542b\u3080HTTP\/2\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b<\/li>\n<\/ul>\n<\/li>\n
    • \u00a0ALPN\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u30d1\u30b1\u30c3\u30c8\u306e\u5185\n
        \n
      • 100%\u304cSPDY\/3\u7cfb(3 or 3.1)\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b<\/li>\n
      • 40%\u304c\u5b9f\u88c5\u30c9\u30e9\u30d5\u30c8\u3092\u542b\u3080HTTP\/2\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b<\/li>\n<\/ul>\n<\/li>\n
      • ALPN\u3088\u308aNPN\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u65b9\u304c\u591a\u3044<\/li>\n<\/ul>\n
        \u3068\u3044\u3046\u4e8b\u304c\u5206\u304b\u308a\u307e\u3057\u305f\u3002<\/p>\n
        \u307e\u3068\u3081<\/h2>\n
        \u4eca\u56de\u306fPC\u5411\u3051\u30b5\u30a4\u30c8\u306e\u30b5\u30fc\u30d0\u3067HTTP\/2\u5bfe\u5fdc\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u6e2c\u5b9a\u3092\u884c\u3044\u307e\u3057\u305f\u3002<\/p>\n
        HTTP\/2\u5bfe\u5fdc\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u5168\u4f53\u306e\u7d0420%\u3001SPDY\u5bfe\u5fdc\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u7d0450%\u4ee5\u4e0a\u3068\u3044\u3046\u7d50\u679c\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u591a\u304f\u306e\u30e6\u30fc\u30b6\u304cHTTP\/2\u306e\u6069\u6075\u3092\u53d7\u3051\u3089\u308c\u308b\u3068\u3044\u3046\u6bb5\u968e\u3067\u306f\u7121\u3044\u3082\u306e\u306e\u3001\u500b\u4eba\u7684\u306b\u306f\u601d\u3063\u3066\u305f\u3088\u308a\u591a\u3044\u306a\u3068\u3044\u3046\u5370\u8c61\u3067\u3059\u3002<\/p>\n
        \u6700\u65b0\u3067\u306f\u306a\u3044\u30d6\u30e9\u30a6\u30b6\u306e\u30a2\u30af\u30bb\u30b9\u306f\u4eca\u5f8c\u3082\u306a\u304f\u306a\u3089\u306a\u3044\u304b\u3068\u601d\u3044\u307e\u3059\u304c\u3001SPDY\u5bfe\u5fdc\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u5272\u5408\u3092\u898b\u308b\u306bHTTP\/2\u5bfe\u5fdc\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u3088\u308b\u30a2\u30af\u30bb\u30b9\u306f\u4eca\u5f8c\u5897\u3048\u3066\u3044\u304f\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n
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        \u6ce8\u610f<\/h3>\n
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