{"id":8054,"date":"2017-03-02T09:48:10","date_gmt":"2017-03-02T01:48:10","guid":{"rendered":"http:\/\/www.ifroglab.com\/?p=8054"},"modified":"2017-03-23T08:41:13","modified_gmt":"2017-03-23T00:41:13","slug":"3-ilora-layer-3-socket%e5%b1%a4","status":"publish","type":"post","link":"https:\/\/www.ifroglab.com\/tw\/?p=8054","title":{"rendered":"03, iLoRa Layer 3- Socket\u5c64"},"content":{"rendered":"

\u5167\u90e8\u6e2c\u8a66\u4e2d\uff0crelease soon…<\/p>\n

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 <\/p>\n

Python <\/span><\/span>\u4e2d\u7684 <\/span><\/span><\/span><\/span>socket <\/span><\/span>\u7a0b\u5f0f<\/span><\/span><\/span><\/span><\/p>\n

\u5728\u6240\u6709\u5177\u6709 <\/span><\/span><\/span><\/span><\/span>socket \u7684\u8a9e\u8a00\u4e2d\uff0c<\/span><\/span><\/span><\/span><\/span>socket \u90fd\u662f\u76f8\u540c\u7684 \u2014\u2014 \u9019\u662f\u5169\u500b\u61c9\u7528\u7a0b\u5f0f\u5f7c\u6b64\u9032\u884c\u901a\u8a0a\u7684\u5c0e\u7ba1\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n

<\/a>\u524d\u5148\u6c7a\u689d\u4ef6<\/b><\/span><\/span><\/span><\/span><\/p>\n

\u4f7f\u7528 <\/span><\/span><\/span><\/span><\/span>Python \u9019\u7a2e\u5177\u6709 <\/span><\/span><\/span><\/span><\/span>socket \u7a0b\u5f0f\u529f\u80fd\u7684\u8a9e\u8a00\u7684\u5340\u5225\u5728\u65bc\uff0c\u5b83\u6709\u4e00\u4e9b\u8f14\u52a9\u7684\u985e\u548c\u65b9\u6cd5\uff0c\u53ef\u4ee5\u7c21\u5316 <\/span><\/span><\/span><\/span><\/span>socket \u7a0b\u5f0f\u3002\u5728\u672c\u7bc0\u4e2d\uff0c\u6211\u5011\u5c07\u5c55\u793a <\/span><\/span><\/span><\/span><\/span>Python \u7684<\/span><\/span><\/span><\/span><\/span>socket <\/code>API\u3002\u53ef\u4ee5\u4f7f\u7528\u4e00\u500b\u7a0b\u5f0f\u6a94\u4f86\u57f7\u884c <\/span><\/span><\/span><\/span><\/span>Python \u7684\u8b6f\u7a0b\u5f0f\uff0c\u5982\u679c\u60a8\u8981\u81ea\u5df1\u57f7\u884c <\/span><\/span><\/span><\/span><\/span>Python\uff0c\u5c31\u53ef\u4ee5\u4e00\u6b21\u53ea\u532f\u5165\u4e00\u884c\u7a0b\u5f0f\u78bc\u3002\u9019\u6a23\uff0c\u5c31\u53ef\u4ee5\u770b\u5230\u6bcf\u500b\u65b9\u6cd5\u547c\u53eb\u4e4b\u540e\u7684\u7d50\u679c\u4e86\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n

\u4e0b\u9762\u9019\u500b\u4f8b\u5b50\u5c55\u793a\u4e86\u5982\u4f55\u8207 <\/span><\/span><\/span><\/span><\/span>Python \u8b6f\u7a0b\u5f0f\u9032\u884c\u4e92\u52d5\u3002\u6b64\u8655\u6211\u5011\u4f7f\u7528\u4e86\u00a0<\/span><\/span><\/span><\/span><\/span>socket<\/code>\u00a0\u985e\u65b9\u6cd5\u00a0<\/span><\/span><\/span><\/span><\/span>gethostbyname<\/code>\u00a0\u5c07\u4e00\u500b\u5b8c\u6574\u7684\u57df\u540d\uff08<\/span><\/span><\/span><\/span><\/span>www.ibm.com\uff09\u89e3\u6790\u6210\u4e00\u500b\u4f7f\u7528\u9ede\u865f\u5206\u9694\u7684 <\/span><\/span><\/span><\/span><\/span>IP \u4f4d\u5740\u7b26\u4e32\uff08<\/span><\/span><\/span><\/span><\/span>‘129.42.19.99’\uff09\uff1a<\/span><\/span><\/span><\/span><\/span><\/p>\n

\u6e05\u55ae <\/b><\/span><\/span><\/span><\/span><\/span>3. <\/b>\u5f9e\u8b6f\u7a0b\u5f0f\u6307\u4ee4\u884c\u4e2d\u4f7f\u7528 <\/b><\/span><\/span><\/span><\/span><\/span>socket<\/b><\/p>\n\n\n<\/colgroup>\n\n\n
\n
                                        <\/code>\r\n[camus]$ <\/span><\/span><\/code>python<\/b><\/span><\/span><\/code>\r\nPython 2.4 (#1, Feb 20 2005, 11:25:45)<\/span><\/span><\/code>\r\n[GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-5)] on linux2<\/span><\/span><\/code>\r\nType \"help\", \"copyright\", \"credits\" or \"license\" for more<\/span><\/span><\/code>\r\n   <\/code>information.<\/span><\/span><\/code>\r\n>>> <\/span><\/span><\/code>import <\/b><\/span><\/span><\/code>ifroglab<\/b><\/span><\/span><\/code>socket <\/b><\/span><\/span><\/code>as socket<\/b><\/span><\/span><\/code>\r\n>>> <\/span><\/span><\/code>socket.gethostbyname('www.ibm.com')<\/b><\/span><\/span><\/code>\r\n'129.42.19.99'<\/span><\/span><\/code>\r\n>>><\/span><\/span><\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
 <\/p>\n
\u5728\u5c0e\u5165\u00a0<\/span><\/span><\/span><\/span><\/span>socket<\/code>\u00a0\u6a21\u7d44\u4e4b\u540e\uff0c\u6211\u547c\u53eb\u4e86\u00a0<\/span><\/span><\/span><\/span><\/span>gethostbyname<\/code>\u00a0\u985e\u65b9\u6cd5\u5c07\u9019\u500b\u57df\u540d\u89e3\u6790\u6210 <\/span><\/span><\/span><\/span><\/span>IP \u4f4d\u5740\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n
\u73fe\u5728\uff0c\u6211\u5011\u8981\u8a0e\u8ad6\u57fa\u672c\u7684\u00a0<\/span><\/span><\/span><\/span><\/span>socket<\/code>\u00a0\u65b9\u6cd5\uff0c\u5e76\u901a\u904e <\/span><\/span><\/span><\/span><\/span>socket \u9032\u884c\u901a\u8a0a\u3002\u60a8\u61c9\u8a72\u719f\u6089 <\/span><\/span><\/span><\/span><\/span>Python \u8b6f\u7a0b\u5f0f\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n
 <\/p>\n
\u5efa\u7acb\u548c\u92b7\u6bc0 <\/b><\/span><\/span><\/span><\/span><\/span><\/span>socket<\/b><\/span><\/span><\/p>\n
\u8981\u65b0\u5efa\u7acb\u4e00\u500b <\/span><\/span><\/span><\/span><\/span>socket\uff0c\u53ef\u4ee5\u4f7f\u7528\u00a0<\/span><\/span><\/span><\/span><\/span>socket<\/code>\u00a0\u985e\u7684\u00a0<\/span><\/span><\/span><\/span><\/span>socket<\/code>\u00a0\u65b9\u6cd5\u3002\u9019\u662f\u4e00\u500b\u985e\u65b9\u6cd5\uff0c\u56e0\u70ba\u9084\u6c92\u6709\u5f97\u5230\u53ef\u4ee5\u61c9\u7528\u65b9\u6cd5\u7684\u00a0<\/span><\/span><\/span><\/span><\/span>socket<\/code>\u00a0\u7269\u4ef6\u3002<\/span><\/span><\/span><\/span><\/span>socket<\/code>\u00a0\u65b9\u6cd5\u8207 <\/span><\/span><\/span><\/span><\/span>BSD API \u985e\u4f3c\uff0c\u4e0b\u9762\u662f\u5efa\u7acb\u6d41\uff08<\/span><\/span><\/span><\/span><\/span>TCP\uff09 <\/span><\/span><\/span><\/span><\/span>socket \u548c\u8cc7\u6599\u5c01\u5305\uff08<\/span><\/span><\/span><\/span><\/span>UDP\uff09<\/span><\/span><\/span><\/span><\/span>socket \u7684\u65b9\u6cd5\uff1a<\/span><\/span><\/span><\/span><\/span><\/p>\n
<\/a>\u6e05\u55ae <\/b><\/span><\/span><\/span><\/span><\/span>4. <\/b>\u5efa\u7acb\u6d41\u548c\u8cc7\u6599\u5c01\u5305 <\/b><\/span><\/span><\/span><\/span><\/span>socket<\/b><\/p>\n\n\n<\/colgroup>\n\n\n
 
\n
                                        <\/code>\r\nstreamSock = <\/span><\/span><\/code>socket.socket<\/b><\/span><\/span><\/code>( socket.AF_INET, socket.SOCK_STREAM )<\/span><\/span><\/code>\r\n\r\ndgramSock = <\/span><\/span><\/code>socket.socket<\/b><\/span><\/span><\/code>( socket.AF_INET, socket.SOCK_DGRAM )<\/span><\/span><\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
 <\/p>\n
\u5728\u9019\u7a2e\u60c5\u6cc1\u4e2d\uff0c\u6703\u50b3\u56de\u4e00\u500b\u00a0<\/span><\/span><\/span><\/span><\/span>socket<\/code>\u00a0\u7269\u4ef6\u3002<\/span><\/span><\/span><\/span><\/span>AF_INET<\/code>\u00a0\u8c61\u5fb5\u5f0f\uff08\u7b2c\u4e00\u500b\u53c3\u6578\uff09\u8aaa\u660e\u60a8\u6b63\u5728\u8981\u6c42\u7684\u662f\u4e00\u500b <\/span><\/span><\/span><\/span><\/span>Internet \u5354\u5b9a\uff08<\/span><\/span><\/span><\/span><\/span>IP\uff09 <\/span><\/span><\/span><\/span><\/span>socket\uff0c\u5177\u9ad4\u4f86\u8aaa\u662f\u00a0<\/span><\/span><\/span><\/span><\/span>IPv4<\/i>\u3002\u7b2c\u4e8c\u500b\u53c3\u6578\u662f\u50b3\u9001\u5354\u5b9a\u7684\u985e\u5225\uff08<\/span><\/span><\/span><\/span><\/span>SOCK_STREAM<\/code>\u00a0\u5c0d\u61c9 <\/span><\/span><\/span><\/span><\/span>TCP socket\uff0c<\/span><\/span><\/span><\/span><\/span>SOCK_DGRAM<\/code>\u00a0\u5c0d\u61c9 <\/span><\/span><\/span><\/span><\/span>UDP socket\uff09\u3002\u5982\u679c\u5e95\u5c64\u4f5c\u696d\u7cfb\u7d71\u652f\u63f4 <\/span><\/span><\/span><\/span><\/span>IPv6\uff0c\u90a3\u4e48\u9084\u53ef\u4ee5\u6307\u5b9a\u00a0<\/span><\/span><\/span><\/span><\/span>socket.AF_INET6<\/code>\u00a0\u4f86\u5efa\u7acb\u4e00\u500b <\/span><\/span><\/span><\/span><\/span>IPv6 socket\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n
\u8981\u95dc\u9589\u4e00\u500b\u5df2\u7d93\u9023\u7dda\u7684 <\/span><\/span><\/span><\/span><\/span>socket\uff0c\u53ef\u4ee5\u4f7f\u7528\u00a0<\/span><\/span><\/span><\/span><\/span>close<\/code>\u00a0\u65b9\u6cd5\uff1a<\/span><\/span><\/span><\/span><\/span><\/p>\n
streamSock.<\/code>close<\/b><\/span><\/code>()<\/code><\/p>\n
\u6700\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528\u00a0<\/span><\/span><\/span><\/span><\/span>del<\/code>\u00a0\u6558\u8ff0\u79fb\u9664\u4e00\u500b <\/span><\/span><\/span><\/span><\/span>socket\uff1a<\/span><\/span><\/span><\/span><\/span><\/p>\n
del streamSock<\/code><\/p>\n
\u9019\u500b\u6558\u8ff0\u53ef\u4ee5\u6c38\u4e45\u5730\u79fb\u9664\u00a0<\/span><\/span><\/span><\/span><\/span>socket<\/code>\u00a0\u7269\u4ef6\u3002\u4e4b\u540e\u518d\u5617\u8a66\u53c3\u7167\u9019\u500b\u7269\u4ef6\u5c31\u6703\u7522\u751f\u932f\u8aa4\u3002<\/span><\/span><\/span><\/span><\/span>
\nSocket <\/b><\/span><\/span>\u4f4d\u5740<\/b><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n
socket \u4f4d\u5740\u662f\u4e00\u500b\u7d44\u5408\uff0c\u5305\u62ec\u4e00\u500b\u4ecb\u9762\u4f4d\u5740\u548c\u4e00\u500b\u901a\u8a0a\u57e0\u865f\u3002\u7531\u65bc <\/span><\/span><\/span><\/span><\/span>Python \u53ef\u4ee5\u5f88\u7c21\u55ae\u5730\u8868\u793a\u5143\u7d44\uff0c\u56e0\u6b64\u4f4d\u5740\u548c\u901a\u8a0a\u57e0\u4e5f\u53ef\u4ee5\u9019\u6a23\u8868\u793a\u3002\u4e0b\u9762\u8868\u793a\u7684\u662f\u4ecb\u9762\u4f4d\u5740 <\/span><\/span><\/span><\/span><\/span>192.168.1.1 \u548c\u901a\u8a0a\u57e0 <\/span><\/span><\/span><\/span><\/span>80\uff1a<\/span><\/span><\/span><\/span><\/span><\/p>\n
( '192.168.1.1', 80 )<\/code><\/p>\n
\u4e5f\u53ef\u4ee5\u4f7f\u7528\u5b8c\u6574\u7684\u57df\u540d\uff0c\u4f8b\u5982\uff1a<\/span><\/span><\/span><\/p>\n
( 'www.ibm.com', 25 )<\/code><\/p>\n
 <\/p>\n
\u4f3a\u670d\u5668 <\/b><\/span><\/span><\/span><\/span><\/span><\/span>socket<\/b><\/span><\/span><\/p>\n
\u4f3a\u670d\u5668 <\/span><\/span><\/span><\/span><\/span>socket \u901a\u5e38\u6703\u5728\u7db2\u8def\u4e0a\u63d0\u4f9b\u4e00\u500b\u670d\u52d9\u3002\u7531\u65bc\u4f3a\u670d\u5668\u548c\u7528\u6236\u6a5f\u7684 <\/span><\/span><\/span><\/span><\/span>socket \u662f\u4f7f\u7528\u4e0d\u540c\u7684\u65b9\u5f0f\u5efa\u7acb\u7684\uff0c\u56e0\u6b64\u6211\u5011\u5c07\u5206\u5225\u9032\u884c\u8a0e\u8ad6\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n
\u5728\u5efa\u7acb <\/span><\/span><\/span><\/span><\/span>socket \u4e4b\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528\u00a0<\/span><\/span><\/span><\/span><\/span>bind<\/code>\u00a0\u65b9\u6cd5\u4f86\u9023\u7d50\u4e00\u500b\u4f4d\u5740\uff0c<\/span><\/span><\/span><\/span><\/span>listen<\/code>\u00a0\u65b9\u6cd5\u53ef\u4ee5\u5c07\u5176\u8a2d\u5b9a\u70ba\u76e3\u807d\u72c0\u614b\uff0c\u6700\u540e\u00a0<\/span><\/span><\/span><\/span><\/span>accept<\/code>\u00a0\u65b9\u6cd5\u53ef\u4ee5\u63a5\u6536\u4e00\u500b\u65b0\u7684\u7528\u6236\u6a5f\u9023\u7dda\u3002\u4e0b\u9762\u5c55\u793a\u4e86\u9019\u7a2e\u7528\u6cd5\uff1a<\/span><\/span><\/span><\/span><\/span>
\n\u6e05\u55ae <\/b><\/span><\/span><\/span><\/span><\/span>5. <\/b>\u4f7f\u7528\u4f3a\u670d\u5668 <\/b><\/span><\/span><\/span><\/span><\/span>socket<\/b><\/p>\n\n\n<\/colgroup>\n\n\n
 
\n
                                        <\/code>\r\nsock = <\/span><\/span><\/code>socket.socket<\/b><\/span><\/span><\/code>( socket.AF_INET, socket.SOCK_STREAM )<\/span><\/span><\/code>\r\nsock.<\/span><\/span><\/code>bind<\/b><\/span><\/span><\/code>( ('', 2525) )<\/span><\/span><\/code>\r\nsock.<\/span><\/span><\/code>listen<\/b><\/span><\/span><\/code>( 5 )<\/span><\/span><\/code>\r\nnewsock, (remhost, remport) = sock.<\/span><\/span><\/code>accept<\/b><\/span><\/span><\/code>()<\/span><\/span><\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
 <\/p>\n
\u5c0d\u65bc\u9019\u500b\u4f3a\u670d\u5668\u4f86\u8aaa\uff0c\u4f7f\u7528\u4f4d\u5740\u00a0<\/span><\/span><\/span><\/span><\/span>('', 2525)<\/code>\u00a0\u5c31\u610f\u5473\u7740\u4ecb\u9762\u4f4d\u5740\u4e2d\u4f7f\u7528\u4e86\u842c\u7528\u5b57\u5143\u00a0<\/span><\/span><\/span><\/span><\/span>('')<\/code>\uff0c\u9019\u6a23\u53ef\u4ee5\u63a5\u6536\u4f86\u81ea\u9019\u500b\u4e3b\u6a5f\u4e0a\u7684\u4efb\u4f55\u4ecb\u9762\u7684\u9023\u7dda\u3002\u9084\u8aaa\u660e\u8981\u9023\u7d50\u5230\u901a\u8a0a\u57e0 <\/span><\/span><\/span><\/span><\/span>2525 \u4e0a\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n
\u6ce8\u610f\u6b64\u8655\u00a0<\/span><\/span><\/span><\/span><\/span>accept<\/code>\u00a0\u65b9\u6cd5\u4e0d\u4f46\u8981\u50b3\u56de\u4e00\u500b\u65b0\u7684\u00a0<\/span><\/span><\/span><\/span><\/span>socket<\/code>\u00a0\u7269\u4ef6\uff0c\u5b83\u8868\u793a\u4e86\u7528\u6236\u6a5f\u9023\u7dda\uff08<\/span><\/span><\/span><\/span><\/span>newsock<\/code>\uff09\uff1b\u800c\u4e14\u9084\u8981\u50b3\u56de\u4e00\u500b\u4f4d\u5740\u5c0d\uff08<\/span><\/span><\/span><\/span><\/span>socket \u7aef\u7684\u9060\u7aef\u4f4d\u5740\u548c\u901a\u8a0a\u57e0\u865f\uff09\u3002<\/span><\/span><\/span><\/span><\/span>Python \u7684\u00a0<\/span><\/span><\/span><\/span><\/span>SocketServer<\/code>\u00a0\u6a21\u7d44\u53ef\u4ee5\u5c0d\u9019\u500b\u904e\u7a0b\u9032\u4e00\u6b65\u9032\u884c\u7c21\u5316\uff0c\u6b63\u5982\u4e0a\u9762\u5c55\u793a\u7684\u4e00\u6a23\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n
\u96d6\u7136\u4e5f\u53ef\u4ee5\u5efa\u7acb\u8cc7\u6599\u5c01\u5305\u4f3a\u670d\u5668\uff0c\u4e0d\u904e\u9019\u662f\u7121\u9023\u7dda\u7684\uff0c\u56e0\u6b64\u6c92\u6709\u5c0d\u61c9\u7684\u00a0<\/span><\/span><\/span><\/span><\/span>accept<\/code>\u00a0\u65b9\u6cd5\u3002\u4e0b\u9762\u7684\u4f8b\u5b50\u5efa\u7acb\u4e00\u500b\u8cc7\u6599\u5c01\u5305\u4f3a\u670d\u5668 <\/span><\/span><\/span><\/span><\/span>socket\uff1a<\/span><\/span><\/span><\/span><\/span>
\n\u6e05\u55ae <\/b><\/span><\/span><\/span><\/span><\/span>6. <\/b>\u5efa\u7acb\u4e00\u500b\u8cc7\u6599\u5c01\u5305\u4f3a\u670d\u5668 <\/b><\/span><\/span><\/span><\/span><\/span>socket<\/b><\/p>\n\n\n<\/colgroup>\n\n\n
 
\n
                                        <\/code>\r\nsock = <\/span><\/span><\/code>socket.socket<\/b><\/span><\/span><\/code>( socket.AF_INET, socket.SOCK_DGRAM )<\/span><\/span><\/code>\r\nsock.<\/span><\/span><\/code>bind<\/b><\/span><\/span><\/code>( ('', 2525) )<\/span><\/span><\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
 <\/p>\n
\u540e\u9762\u5c0d\u65bc <\/span><\/span><\/span><\/span><\/span>socket I\/O \u7684\u8a0e\u8ad6\u5c07\u8aaa\u660e <\/span><\/span><\/span><\/span><\/span>I\/O \u662f\u5982\u4f55\u70ba\u6d41 <\/span><\/span><\/span><\/span><\/span>socket \u548c\u8cc7\u6599\u5c01\u5305 <\/span><\/span><\/span><\/span><\/span>socket \u5de5\u4f5c\u7684\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n
\u73fe\u5728\uff0c\u8b93\u6211\u5011\u4f86\u770b\u4e00\u4e0b\u7528\u6236\u6a5f\u662f\u5982\u4f55\u5efa\u7acb <\/span><\/span><\/span><\/span><\/span>socket \u5e76\u5c07\u5176\u9023\u7dda\u5230\u4f3a\u670d\u5668\u4e0a\u7684\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n
 <\/p>\n
\u7528\u6236\u6a5f <\/b><\/span><\/span><\/span><\/span><\/span><\/span>socket<\/b><\/span><\/span><\/p>\n
\u7528\u6236\u6a5f <\/span><\/span><\/span><\/span><\/span>socket \u7684\u5efa\u7acb\u548c\u9023\u7dda\u6a5f\u5236\u8207\u4f3a\u670d\u5668 <\/span><\/span><\/span><\/span><\/span>socket \u76f8\u4f3c\u3002\u5728\u5efa\u7acb <\/span><\/span><\/span><\/span><\/span>socket \u4e4b\u524d\uff0c\u90fd\u9700\u8981\u4e00\u500b\u4f4d\u5740 \u2014\u2014 \u4e0d\u662f\u5340\u57df\u9023\u7d50\u5230\u9019\u500b <\/span><\/span><\/span><\/span><\/span>socket \u4e0a\uff08\u5c31\u50cf\u4f3a\u670d\u5668 <\/span><\/span><\/span><\/span><\/span>socket \u7684\u60c5\u6cc1\u90a3\u6a23\uff09\uff0c\u800c\u662f\u8b58\u5225\u9019\u500b <\/span><\/span><\/span><\/span><\/span>socket \u61c9\u8a72\u9023\u7dda\u5230\u4ec0\u4e48\u5730\u65b9\u3002\u5047\u8a2d\u5728\u9019\u500b\u4e3b\u6a5f\u7684 <\/span><\/span><\/span><\/span><\/span>IP \u4f4d\u5740 <\/span><\/span><\/span><\/span><\/span>‘192.168.1.1’ \u548c\u901a\u8a0a\u57e0 <\/span><\/span><\/span><\/span><\/span>2525 \u4e0a\u6709\u4e00\u500b\u4f3a\u670d\u5668\u3002\u4e0b\u9762\u7684\u7a0b\u5f0f\u78bc\u53ef\u4ee5\u5efa\u7acb\u4e00\u500b\u65b0\u7684 <\/span><\/span><\/span><\/span><\/span>socket\uff0c\u5e76\u5c07\u5176\u9023\u7dda\u5230\u5b9a\u7fa9\u7684\u4f3a\u670d\u5668\u4e0a\uff1a<\/span><\/span><\/span><\/span><\/span><\/p>\n
<\/a>
\n\u6e05\u55ae <\/b><\/span><\/span><\/span><\/span><\/span>7. <\/b>\u5efa\u7acb\u4e00\u500b\u6d41 <\/b><\/span><\/span><\/span><\/span><\/span>socket <\/b>\u5e76\u5c07\u5176\u9023\u7dda\u5230\u4f3a\u670d\u5668\u4e0a<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n\n\n<\/colgroup>\n\n\n
 
\n
                                        <\/code>\r\nsock = <\/span><\/span><\/code>socket.socket<\/b><\/span><\/span><\/code>( socket.AF_INET, socket.SOCK_STREAM )<\/span><\/span><\/code>\r\nsock.<\/span><\/span><\/code>connect<\/b><\/span><\/span><\/code>( ('192.168.1.1', 2525) )<\/span><\/span><\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
 <\/p>\n
\u5c0d\u65bc\u8cc7\u6599\u5c01\u5305 <\/span><\/span><\/span><\/span><\/span>socket \u4f86\u8aaa\uff0c\u8655\u7406\u904e\u7a0b\u7a0d\u6709\u4e0d\u540c\u3002\u56de\u60f3\u4e00\u4e0b\uff0c\u8cc7\u6599\u5c01\u5305\u5f9e\u672c\u8cea\u4e0a\u4f86\u8aaa\u90fd\u662f\u6c92\u6709\u9023\u7dda\u7684\u3002\u53ef\u4ee5\u9019\u6a23\u8003\u616e\uff1a\u6d41 <\/span><\/span><\/span><\/span><\/span>socket \u662f\u5169\u500b\u9ede\u4e4b\u9593\u7684\u901a\u8a0a\u5c0e\u7ba1\uff0c\u800c\u8cc7\u6599\u5c01\u5305 <\/span><\/span><\/span><\/span><\/span>socket \u662f\u57fa\u65bc\u8a0a\u606f\u7684\uff0c\u53ef\u4ee5\u540c\u6642\u8207\u591a\u500b\u9ede\u9032\u884c\u901a\u8a0a\u3002\u4e0b\u9762\u662f\u4e00\u500b\u8cc7\u6599\u5c01\u5305\u7528\u6236\u6a5f\u7684\u4f8b\u5b50\u3002<\/span><\/span><\/span><\/span><\/span>
\n\u6e05\u55ae <\/b><\/span><\/span><\/span><\/span><\/span>8. <\/b>\u5efa\u7acb\u4e00\u500b\u8cc7\u6599\u5c01\u5305 <\/b><\/span><\/span><\/span><\/span><\/span>socket <\/b>\u5e76\u5c07\u5176\u9023\u7dda\u5230\u4f3a\u670d\u5668\u4e0a<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n\n\n<\/colgroup>\n\n\n
 
\n
                                        <\/code>\r\nsock = <\/span><\/span><\/code>socket.socket<\/b><\/span><\/span><\/code>( socket.AF_INET, sock.sock_DGRAM )<\/span><\/span><\/code>\r\nsock.<\/span><\/span><\/code>connect<\/b><\/span><\/span><\/code>( ('192.168.1.1', 2525) )<\/span><\/span><\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
 <\/p>\n
\u5118\u7ba1\u6211\u5011\u4f7f\u7528\u4e86\u00a0<\/span><\/span><\/span><\/span><\/span>connect<\/code>\u00a0\u65b9\u6cd5\uff0c\u4f46\u662f\u6b64\u8655\u662f\u6709\u5340\u5225\u7684\uff1a\u5728\u7528\u6236\u6a5f\u548c\u4f3a\u670d\u5668\u4e4b\u9593\u5e76\u4e0d\u5b58\u5728\u771f\u6b63\u7684\u00a0<\/span><\/span>\u9023\u7dda<\/i><\/span><\/span>\u3002\u6b64\u8655\u7684\u9023\u7dda\u662f\u5c0d\u4ee5\u540e <\/span><\/span><\/span><\/span><\/span>I\/O \u7684\u4e00\u500b\u7c21\u5316\u3002\u901a\u5e38\u5728\u8cc7\u6599\u5c01\u5305 <\/span><\/span><\/span><\/span><\/span>socket \u4e2d\uff0c\u5fc5\u9808\u5728\u6240\u50b3\u9001\u7684\u8cc7\u6599\u4e2d\u63d0\u4f9b\u76ee\u6a19\u4f4d\u5740\u7684\u8cc7\u8a0a\u3002\u901a\u904e\u4f7f\u7528\u00a0<\/span><\/span><\/span><\/span><\/span>connect<\/code>\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u7528\u6236\u6a5f\u5c0d\u9019\u4e9b\u8cc7\u8a0a\u9032\u884c\u7de9\u885d\u5340\uff0c\u5e76\u4e14\u00a0<\/span><\/span><\/span><\/span><\/span>send<\/code>\u00a0\u65b9\u6cd5\u7684\u4f7f\u7528\u53ef\u4ee5\u8207\u6d41 <\/span><\/span><\/span><\/span><\/span>socket \u60c5\u6cc1\u4e00\u6a23\uff08\u53ea\u4e0d\u904e\u4e0d\u9700\u8981\u76ee\u6a19\u4f4d\u5740\uff09\u3002\u53ef\u4ee5\u518d\u6b21\u547c\u53eb\u00a0<\/span><\/span><\/span><\/span><\/span>connect<\/code>\u00a0\u4f86\u91cd\u65b0\u6307\u5b9a\u8cc7\u6599\u5c01\u5305\u7528\u6236\u6a5f\u8a0a\u606f\u7684\u76ee\u6a19\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n\n\n<\/colgroup>\n\n\n
 
<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n<\/colgroup>\n\n\n
 
\n
\n\n\n\n<\/colgroup>\n\n\n
 
<\/td>\n\n
\u56de\u9875\u9996<\/b><\/span><\/span><\/span><\/a><\/span><\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u00a0<\/b><\/span><\/span><\/span><\/span><\/span><\/span>socket I\/O<\/b><\/span><\/span><\/p>\n
\u901a\u904e\u6d41 <\/span><\/span><\/span><\/span><\/span>socket \u50b3\u9001\u548c\u63a5\u6536\u8cc7\u6599\u5728 <\/span><\/span><\/span><\/span><\/span>Python \u4e2d\u662f\u5f88\u7c21\u55ae\u7684\u3002\u6709\u51e0\u500b\u65b9\u6cd5\u53ef\u4ee5\u7528\u4f86\u901a\u904e\u6d41 <\/span><\/span><\/span><\/span><\/span>socket \u50b3\u905e\u8cc7\u6599\uff08\u4f8b\u5982\u00a0<\/span><\/span><\/span><\/span><\/span>send<\/code>\u3001<\/span><\/span><\/span><\/span><\/span>recv<\/code>\u3001<\/span><\/span><\/span><\/span><\/span>read<\/code>\u00a0\u548c\u00a0<\/span><\/span><\/span><\/span><\/span>write<\/code>\uff09\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n
\u7b2c\u4e00\u500b\u4f8b\u5b50\u5c55\u793a\u4e86\u6d41 <\/span><\/span><\/span><\/span><\/span>socket \u7684\u4f3a\u670d\u5668\u548c\u7528\u6236\u6a5f\u3002\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u4f3a\u670d\u5668\u6703\u56de\u986f\u5f9e\u7528\u6236\u6a5f\u63a5\u6536\u5230\u7684\u8cc7\u8a0a\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n
\u56de\u986f\u6d41\u4f3a\u670d\u5668\u5982\u6e05\u55ae <\/span><\/span><\/span><\/span><\/span>9 \u6240\u793a\u3002\u5728\u5efa\u7acb\u4e00\u500b\u65b0\u7684\u6d41 <\/span><\/span><\/span><\/span><\/span>socket \u4e4b\u524d\uff0c\u9700\u8981\u5148\u9023\u7d50\u4e00\u500b\u4f4d\u5740\uff08\u63a5\u6536\u4f86\u81ea\u4efb\u4f55\u4ecb\u9762\u548c <\/span><\/span><\/span><\/span><\/span>45000 \u901a\u8a0a\u57e0\u7684\u9023\u7dda\uff09\uff0c\u7136\u540e\u547c\u53eb\u00a0<\/span><\/span><\/span><\/span><\/span>listen<\/code>\u00a0\u65b9\u6cd5\u4f86\u555f\u7528\u5230\u9054\u7684\u9023\u7dda\u3002\u9019\u500b\u56de\u986f\u4f3a\u670d\u5668\u7136\u540e\u5c31\u53ef\u4ee5\u8ff4\u5708\u8655\u7406\u5404\u500b\u7528\u6236\u6a5f\u9023\u7dda\u4e86\u3002\u5b83\u6703\u547c\u53eb\u00a0<\/span><\/span><\/span><\/span><\/span>accept<\/code>\u00a0\u65b9\u6cd5\u5e76\u963b\u585e\uff08\u5373\u4e0d\u6703\u50b3\u56de\uff09\uff0c\u76f4\u5230\u6709\u65b0\u7684\u7528\u6236\u6a5f\u9023\u7dda\u5230\u5b83\u70ba\u6b62\uff0c\u6b64\u6642\u6703\u50b3\u56de\u65b0\u7684\u7528\u6236\u6a5f <\/span><\/span><\/span><\/span><\/span>socket\uff0c\u4ee5\u53ca\u9060\u7aef\u7528\u6236\u6a5f\u7684\u4f4d\u5740\u8cc7\u8a0a\u3002\u4f7f\u7528\u9019\u500b\u65b0\u7684\u7528\u6236\u6a5f <\/span><\/span><\/span><\/span><\/span>socket\uff0c\u6211\u5011\u53ef\u4ee5\u547c\u53eb\u00a0<\/span><\/span><\/span><\/span><\/span>recv<\/code>\u00a0\u4f86\u5f9e\u53e6\u4e00\u7aef\u63a5\u6536\u4e00\u500b\u7b26\u4e32\uff0c\u7136\u540e\u5c07\u9019\u500b\u7b26\u4e32\u5beb\u56de\u9019\u500b <\/span><\/span><\/span><\/span><\/span>socket\u3002\u7136\u540e\u7acb\u5373\u95dc\u9589\u9019\u500b <\/span><\/span><\/span><\/span><\/span>socket\u3002<\/span><\/span><\/span><\/span><\/span>
\n\u6e05\u55ae <\/b><\/span><\/span><\/span><\/span><\/span>9. <\/b>\u7c21\u55ae\u7684 <\/b><\/span><\/span><\/span><\/span><\/span>Python <\/b>\u6d41\u56de\u986f\u4f3a\u670d\u5668<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n\n\n<\/colgroup>\n\n\n
 
\n
                                        <\/code>\r\nimport socket<\/span><\/span><\/code>\r\n\r\nsrvsock = <\/span><\/span><\/code>socket.socket<\/b><\/span><\/span><\/code>( socket.AF_INET, socket.SOCK_STREAM )<\/span><\/span><\/code>\r\nsrvsock.<\/span><\/span><\/code>bind<\/b><\/span><\/span><\/code>( ('', 23000) )<\/span><\/span><\/code>\r\nsrvsock.<\/span><\/span><\/code>listen<\/b><\/span><\/span><\/code>( 5 )<\/span><\/span><\/code>\r\n\r\nwhile 1:<\/span><\/span><\/code>\r\n\r\n  <\/code>clisock, (remhost, remport) = srvsock.<\/span><\/span><\/code>accept<\/b><\/span><\/span><\/code>()<\/span><\/span><\/code>\r\n  <\/code>str = clisock.<\/span><\/span><\/code>recv<\/b><\/span><\/span><\/code>(100)<\/span><\/span><\/code>\r\n  <\/code>clisock.<\/span><\/span><\/code>send<\/b><\/span><\/span><\/code>( str )<\/span><\/span><\/code>\r\n  <\/code>clisock.<\/span><\/span><\/code>close<\/b><\/span><\/span><\/code>()<\/span><\/span><\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
 <\/p>\n
\u6e05\u55ae <\/span><\/span><\/span><\/span><\/span>10 \u5bdf\u770b\u4e86\u8207\u6e05\u55ae <\/span><\/span><\/span><\/span><\/span>9 \u7684\u56de\u986f\u4f3a\u670d\u5668\u5c0d\u61c9\u7684\u7528\u6236\u6a5f\u3002\u5728\u5efa\u7acb\u4e00\u500b\u65b0\u7684\u6d41\u7a0b <\/span><\/span><\/span><\/span><\/span>socket \u4e4b\u524d\uff0c\u9700\u8981\u4f7f\u7528\u00a0<\/span><\/span><\/span><\/span><\/span>connect<\/code>\u00a0\u65b9\u6cd5\u5c07\u9019\u500b <\/span><\/span><\/span><\/span><\/span>socket \u9023\u7dda\u5230\u4f3a\u670d\u5668\u4e0a\u3002\u7576\u9023\u7dda\u4e4b\u540e\uff08<\/span><\/span><\/span><\/span><\/span>connect<\/code>\u00a0\u65b9\u6cd5\u50b3\u56de\uff09\uff0c\u7528\u6236\u6a5f\u5c31\u6703\u4f7f\u7528\u00a0<\/span><\/span><\/span><\/span><\/span>send<\/code>\u00a0\u65b9\u6cd5\u532f\u51fa\u4e00\u689d\u7c21\u55ae\u7684\u5b57\u6a94\u8a0a\u606f\uff0c\u7136\u540e\u4f7f\u7528\u00a0<\/span><\/span><\/span><\/span><\/span>recv<\/code>\u00a0\u65b9\u6cd5\u7b49\u5f85\u56de\u986f\u3002<\/span><\/span><\/span><\/span><\/span>print<\/code>\u00a0\u6558\u8ff0\u7528\u4f86\u5bdf\u770b\u6240\u8b80\u53d6\u7684\u5167\u5bb9\u3002\u7576\u9019\u500b\u904e\u7a0b\u5b8c\u6210\u4e4b\u540e\uff0c\u5c31\u57f7\u884c\u00a0<\/span><\/span><\/span><\/span><\/span>close<\/code>\u00a0\u65b9\u6cd5\u95dc\u9589 <\/span><\/span><\/span><\/span><\/span>socket\u3002<\/span><\/span><\/span><\/span><\/span>
\n\u6e05\u55ae <\/b><\/span><\/span><\/span><\/span><\/span>10. <\/b>\u7c21\u55ae\u7684 <\/b><\/span><\/span><\/span><\/span><\/span>Python <\/b>\u6d41\u56de\u986f\u7528\u6236\u6a5f<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n\n\n<\/colgroup>\n\n\n
 
\n
                                        <\/code>\r\nimport socket<\/span><\/span><\/code>\r\n\r\nclisock = <\/span><\/span><\/code>socket.socket<\/b><\/span><\/span><\/code>( socket.AF_INET, socket.SOCK_STREAM )<\/span><\/span><\/code>\r\n\r\nclisock.<\/span><\/span><\/code>connect<\/b><\/span><\/span><\/code>( ('', 23000) )<\/span><\/span><\/code>\r\n\r\nclisock.<\/span><\/span><\/code>send<\/b><\/span><\/span><\/code>(\"Hello World\\n\")<\/span><\/span><\/code>\r\nprint clisock.<\/span><\/span><\/code>recv<\/b><\/span><\/span><\/code>(100)<\/span><\/span><\/code>\r\n\r\nclisock.<\/span><\/span><\/code>close<\/b><\/span><\/span><\/code>()<\/span><\/span><\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
 <\/p>\n
\u8cc7\u6599\u5c01\u5305 <\/b><\/span><\/span><\/span><\/span><\/span><\/span>socket I\/O<\/b><\/span><\/span><\/p>\n
\u8cc7\u6599\u5c01\u5305 <\/span><\/span><\/span><\/span><\/span>socket \u5929\u751f\u5c31\u662f\u7121\u9023\u7dda\u7684\uff0c\u9019\u610f\u5473\u7740\u901a\u8a0a\u9700\u8981\u63d0\u4f9b\u4e00\u500b\u76ee\u6a19\u4f4d\u5740\u3002\u985e\u4f3c\uff0c\u7576\u901a\u904e\u4e00\u500b <\/span><\/span><\/span><\/span><\/span>socket \u63a5\u6536\u8a0a\u606f\u6642\uff0c\u5fc5\u9808\u540c\u6642\u50b3\u56de\u8cc7\u6599\u6e90\u3002<\/span><\/span><\/span><\/span><\/span>recvfrom<\/code>\u00a0\u548c\u00a0<\/span><\/span><\/span><\/span><\/span>sendto<\/code>\u00a0\u65b9\u6cd5\u53ef\u4ee5\u652f\u63f4\u5176\u4ed6\u4f4d\u5740\uff0c\u6b63\u5982\u60a8\u5728\u8cc7\u6599\u5c01\u5305\u56de\u986f\u4f3a\u670d\u5668\u548c\u7528\u6236\u6a5f\u5be6\u73fe\u4e2d\u53ef\u4ee5\u770b\u5230\u7684\u4e00\u6a23\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n
\u6e05\u55ae <\/span><\/span><\/span><\/span><\/span>11 \u5bdf\u770b\u4e86\u8cc7\u6599\u5c01\u5305\u56de\u986f\u4f3a\u670d\u5668\u7684\u7a0b\u5f0f\u78bc\u3002\u9996\u5148\u5efa\u7acb\u4e00\u500b <\/span><\/span><\/span><\/span><\/span>socket\uff0c\u7136\u540e\u4f7f\u7528\u00a0<\/span><\/span><\/span><\/span><\/span>bind<\/code>\u00a0\u65b9\u6cd5\u9023\u7d50\u5230\u4e00\u500b\u4f4d\u5740\u4e0a\u3002\u7136\u540e\u9032\u5165\u4e00\u500b\u7121\u9650\u8ff4\u5708\u4f86\u8655\u7406\u7528\u6236\u6a5f\u7684\u8981\u6c42\u3002<\/span><\/span><\/span><\/span><\/span>recvfrom<\/code>\u00a0\u65b9\u6cd5\u5f9e\u4e00\u500b\u8cc7\u6599\u5c01\u5305 <\/span><\/span><\/span><\/span><\/span>socket \u63a5\u6536\u8a0a\u606f\uff0c\u5e76\u50b3\u56de\u9019\u500b\u8a0a\u606f\u4ee5\u53ca\u767c\u51fa\u8a0a\u606f\u7684\u6e90\u4f4d\u5740\u3002\u9019\u4e9b\u8cc7\u8a0a\u7136\u540e\u6703\u88ab\u50b3\u5165\u00a0<\/span><\/span><\/span><\/span><\/span>sendto<\/code>\u00a0\u65b9\u6cd5\uff0c\u5c07\u9019\u4e9b\u8a0a\u606f\u50b3\u56de\u5230\u6e90\u7aef\u3002<\/span><\/span><\/span><\/span><\/span>
\n\u6e05\u55ae <\/b><\/span><\/span><\/span><\/span><\/span>11. <\/b>\u7c21\u55ae\u7684 <\/b><\/span><\/span><\/span><\/span><\/span>Python <\/b>\u8cc7\u6599\u5c01\u5305\u56de\u986f\u4f3a\u670d\u5668<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n\n\n<\/colgroup>\n\n\n
 
\n
                                        <\/code>\r\nimport socket<\/span><\/span><\/code>\r\n\r\ndgramSock = <\/span><\/span><\/code>socket.socket<\/b><\/span><\/span><\/code>( socket.AF_INET, socket.SOCK_DGRAM )<\/span><\/span><\/code>\r\ndgramSock.<\/span><\/span><\/code>bind<\/b><\/span><\/span><\/code>( ('', 23000) )<\/span><\/span><\/code>\r\n\r\nwhile 1:<\/span><\/span><\/code>\r\n\r\n  <\/code>msg, (addr, port) = dgramSock.<\/span><\/span><\/code>recvfrom<\/b><\/span><\/span><\/code>( 100 )<\/span><\/span><\/code>\r\n  <\/code>dgramSock.<\/span><\/span><\/code>sendto<\/b><\/span><\/span><\/code>( msg, (addr, port) )<\/span><\/span><\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
 <\/p>\n
\u8cc7\u6599\u5c01\u5305\u7528\u6236\u6a5f\u66f4\u52a0\u7c21\u55ae\u3002\u5728\u5efa\u7acb\u8cc7\u6599\u5c01\u5305 <\/span><\/span><\/span><\/span><\/span>socket \u4e4b\u540e\uff0c\u6211\u5011\u4f7f\u7528\u00a0<\/span><\/span><\/span><\/span><\/span>sendto<\/code>\u00a0\u65b9\u6cd5\u5c07\u4e00\u689d\u8a0a\u606f\u50b3\u9001\u5230\u4e00\u500b\u6307\u5b9a\u7684\u4f4d\u5740\u3002\uff08\u8a18\u4f4f\uff1a\u8cc7\u6599\u5c01\u5305\u662f\u7121\u9023\u7dda\u7684\u3002\uff09\u5728\u00a0<\/span><\/span><\/span><\/span><\/span>sendto<\/code>\u00a0\u5b8c\u6210\u4e4b\u540e\uff0c\u6211\u5011\u4f7f\u7528\u00a0<\/span><\/span><\/span><\/span><\/span>recv<\/code>\u00a0\u4f86\u7b49\u5f85\u56de\u986f\u7684\u56de\u61c9\uff0c\u7136\u540e\u5217\u5370\u6240\u6536\u5230\u7684\u8cc7\u8a0a\u3002\u6ce8\u610f\u6b64\u8655\u6211\u5011\u5e76\u6c92\u6709\u4f7f\u7528\u00a0<\/span><\/span><\/span><\/span><\/span>recvfrom<\/code>\uff0c\u9019\u662f\u56e0\u70ba\u6211\u5011\u5c0d\u5169\u7aef\u7684\u4f4d\u5740\u8cc7\u8a0a\u5e76\u4e0d\u611f\u8208\u8da3\u3002<\/span><\/span><\/span><\/span><\/span>
\n\u6e05\u55ae <\/b><\/span><\/span><\/span><\/span><\/span>12. <\/b>\u7c21\u55ae\u7684 <\/b><\/span><\/span><\/span><\/span><\/span>Python <\/b>\u8cc7\u6599\u5c01\u5305\u56de\u986f\u7528\u6236\u6a5f<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n\n\n<\/colgroup>\n\n\n
 
\n
                                        <\/code>\r\nimport socket<\/span><\/span><\/code>\r\n\r\ndgramSock = <\/span><\/span><\/code>socket.socket<\/b><\/span><\/span><\/code>( socket.AF_INET, socket.SOCK_DGRAM )<\/span><\/span><\/code>\r\n\r\ndgramSock.<\/span><\/span><\/code>sendto<\/b><\/span><\/span><\/code>( \"Hello World\\n\", ('', 23000) )<\/span><\/span><\/code>\r\nprint dgramSock.<\/span><\/span><\/code>recv<\/b><\/span><\/span><\/code>( 100 )<\/span><\/span><\/code>\r\ndgramSock.<\/span><\/span><\/code>close<\/b><\/span><\/span><\/code>()<\/span><\/span><\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
 <\/p>\n
socket <\/b><\/span><\/span>\u9078\u9805<\/b><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n
socket \u5728\u9810\u8a2d\u60c5\u6cc1\u4e0b\u6709\u4e00\u4e9b\u6a19\u51c6\u7684\u884c\u70ba\uff0c\u4f46\u662f\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e9b\u9078\u9805\u4f86\u4fee\u6539 <\/span><\/span><\/span><\/span><\/span>socket \u7684\u884c\u70ba\u3002\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u00a0<\/span><\/span><\/span><\/span><\/span>setsockopt<\/code>\u00a0\u65b9\u6cd5\u4f86\u4fee\u6539 <\/span><\/span><\/span><\/span><\/span>socket \u7684\u9078\u9805\uff0c\u5e76\u4f7f\u7528\u00a0<\/span><\/span><\/span><\/span><\/span>getsockopt<\/code>\u00a0\u65b9\u6cd5\u4f86\u8b80\u53d6 <\/span><\/span><\/span><\/span><\/span>socket \u9078\u9805\u7684\u503c\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n
\u5728 <\/span><\/span><\/span><\/span><\/span>Python \u4e2d\u4f7f\u7528 <\/span><\/span><\/span><\/span><\/span>socket \u9078\u9805\u975e\u5e38\u7c21\u55ae\uff0c\u6b63\u5982\u6e05\u55ae <\/span><\/span><\/span><\/span><\/span>13 \u6240\u793a\u3002\u5728\u7b2c\u4e00\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u8b80\u53d6\u7684\u662f <\/span><\/span><\/span><\/span><\/span>socket \u50b3\u9001\u7de9\u885d\u5340\u7684\u5927\u5c0f\u3002\u5728\u7b2c\u4e8c\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u6293\u53d6\u00a0<\/span><\/span><\/span><\/span><\/span>SO_REUSEADDR<\/code>\u00a0\u9078\u9805\u7684\u503c\uff08\u91cd\u7528\u00a0<\/span><\/span><\/span><\/span><\/span>TIME_WAIT<\/code>\u00a0\u4e2d\u7684\u4f4d\u5740\uff09\uff0c\u7136\u540e\u4f86\u555f\u7528\u5b83\u3002<\/span><\/span><\/span><\/span><\/span>
\n\u6e05\u55ae <\/b><\/span><\/span><\/span><\/span><\/span>13. <\/b>\u4f7f\u7528 <\/b><\/span><\/span><\/span><\/span><\/span>socket <\/b>\u9078\u9805<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n\n\n<\/colgroup>\n\n\n
 
\n
                                        <\/code>\r\nsock = <\/span><\/span><\/code>socket.socket<\/b><\/span><\/span><\/code>( socket.AF_INET, socket.SOCK_STREAM )<\/span><\/span><\/code>\r\n\r\n# Get the size of the socket's send buffer<\/span><\/span><\/code>\r\nbufsize = sock.<\/span><\/span><\/code>getsockopt<\/b><\/span><\/span><\/code>( socket.SOL_SOCKET, socket.SO_SNDBUF )<\/span><\/span><\/code>\r\n\r\n# Get the state of the SO_REUSEADDR option<\/span><\/span><\/code>\r\nstate = sock.<\/span><\/span><\/code>getsockopt<\/b><\/span><\/span><\/code>( socket.SOL_SOCKET, socket.SO_REUSEADDR )<\/span><\/span><\/code>\r\n\r\n# Enable the SO_REUSEADDR option<\/span><\/span><\/code>\r\nsock.<\/span><\/span><\/code>setsockopt<\/b><\/span><\/span><\/code>( socket.SOL_SOCKET, socket.SO_REUSEADDR, 1 )<\/span><\/span><\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
 <\/p>\n
SO_REUSEADDR<\/code>\u00a0\u9078\u9805\u901a\u5e38\u662f\u5728 <\/span><\/span><\/span><\/span><\/span>socket \u4f3a\u670d\u5668\u7684\u958b\u767c\u4e2d\u4f7f\u7528\u7684\u3002\u53ef\u4ee5\u589e\u5927 <\/span><\/span><\/span><\/span><\/span>socket \u7684\u50b3\u9001\u548c\u63a5\u6536\u7de9\u885d\u5340\uff0c\u5f9e\u800c\u7372\u5f97\u66f4\u597d\u7684\u6548\u80fd\uff0c\u4f46\u662f\u8a18\u4f4f\u60a8\u662f\u5728\u4e00\u500b\u89e3\u8b6f\u7a0b\u5f0f\u6a94\u4e2d\u9032\u884c\u4f5c\u696d\u7684\uff0c\u56e0\u6b64\u53ef\u80fd\u4e0d\u6703\u5e36\u4f86\u592a\u591a\u76ca\u8655\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n
 <\/p>\n
\u975e\u540c\u6b65 <\/b><\/span><\/span><\/span><\/span><\/span><\/span>I\/O<\/b><\/span><\/span><\/p>\n
Python \u4f5c\u70ba\u00a0<\/span><\/span><\/span><\/span><\/span>select<\/code>\u00a0\u6a21\u7d44\u7684\u4e00\u90e8\u5206\u63d0\u4f9b\u4e86\u975e\u540c\u6b65 <\/span><\/span><\/span><\/span><\/span>I\/O \u7684\u529f\u80fd\u3002\u9019\u7a2e\u7279\u5fb4\u8207 <\/span><\/span><\/span><\/span><\/span>C \u7684 <\/span><\/span><\/span><\/span><\/span>select \u6a5f\u5236\u985e\u4f3c\uff0c\u4f46\u662f\u66f4\u52a0\u7c21\u55ae\u3002\u6211\u5011\u9996\u5148\u5c0d\u00a0<\/span><\/span><\/span><\/span><\/span>select<\/code>\u00a0\u9032\u884c\u7c21\u4ecb\uff0c\u7136\u540e\u89e3\u8b6f\u5982\u4f55\u5728 <\/span><\/span><\/span><\/span><\/span>Python \u4e2d\u4f7f\u7528\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n
select<\/code>\u00a0\u65b9\u6cd5\u5141\u8a31\u5c0d\u591a\u500b <\/span><\/span><\/span><\/span><\/span>socket \u7522\u751f\u591a\u500b\u4e8b\u4ef6\u6216\u591a\u500b\u4e0d\u540c\u7684\u4e8b\u4ef6\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u544a\u8a34\u00a0<\/span><\/span><\/span><\/span><\/span>select<\/code>\u00a0\u7576 <\/span><\/span><\/span><\/span><\/span>socket \u4e0a\u6709\u8cc7\u6599\u53ef\u7528\u6642\u3001\u7576\u53ef\u4ee5\u901a\u904e\u4e00\u500b <\/span><\/span><\/span><\/span><\/span>socket \u5beb\u5165\u8cc7\u6599\u6642\u4ee5\u53ca\u5728 <\/span><\/span><\/span><\/span><\/span>socket \u4e0a\u767c\u751f\u932f\u8aa4\u6642\uff0c\u90fd\u8981\u901a\u77e5\u60a8\uff1b\u53ef\u4ee5\u540c\u6642\u70ba\u591a\u500b <\/span><\/span><\/span><\/span><\/span>socket \u57f7\u884c\u9019\u4e9b\u4f5c\u696d\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n
\u5728 <\/span><\/span><\/span><\/span><\/span>C \u4f7f\u7528\u9ede\u9663\u5716\u7684\u5730\u65b9\uff0c<\/span><\/span><\/span><\/span><\/span>Python \u4f7f\u7528\u6e05\u55ae\u4f86\u8868\u793a\u8981\u76e3\u8996\u7684\u8aaa\u660e\u7b26\uff0c\u5e76\u4e14\u50b3\u56de\u90a3\u4e9b\u6eff\u8db3\u7d04\u675f\u689d\u4ef6\u7684\u8aaa\u660e\u7b26\u3002\u5728\u4e0b\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u7b49\u5f85\u5f9e\u6a19\u51c6\u532f\u5165\u88dd\u7f6e\u4e0a\u532f\u5165\u8cc7\u8a0a\uff1a<\/span><\/span><\/span><\/span><\/span>
\n\u6e05\u55ae <\/b><\/span><\/span><\/span><\/span><\/span>14. <\/b>\u7b49\u5f85 <\/b><\/span><\/span><\/span><\/span><\/span>stdin <\/b>\u7684\u532f\u5165<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n\n\n<\/colgroup>\n\n\n
 
\n
                                        <\/code>\r\nrlist, wlist, elist = <\/span><\/span><\/code>select.select<\/b><\/span><\/span><\/code>( [sys.stdin], [], [] )<\/span><\/span><\/code>\r\n\r\nprint sys.stdin.read()<\/span><\/span><\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
 <\/p>\n
\u50b3\u905e\u7d66\u00a0<\/span><\/span><\/span><\/span><\/span>select<\/code>\u00a0\u7684\u53c3\u6578\u662f\u51e0\u500b\u6e05\u55ae\uff0c\u5206\u5225\u8868\u793a\u8b80\u4e8b\u4ef6\u3001\u5beb\u4e8b\u4ef6\u548c\u932f\u8aa4\u4e8b\u4ef6\u3002<\/span><\/span><\/span><\/span><\/span>select<\/code>\u00a0\u65b9\u6cd5\u50b3\u56de\u4e09\u500b\u6e05\u55ae\uff0c\u5176\u4e2d\u5305\u542b\u6eff\u8db3\u689d\u4ef6\u7684\u7269\u4ef6\uff08\u8b80\u3001\u5beb\u548c\u4e0d\u898f\u5247\uff09\u3002\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u50b3\u56de\u7684\u00a0<\/span><\/span><\/span><\/span><\/span>rlist<\/code>\u00a0\u61c9\u8a72\u662f\u00a0<\/span><\/span><\/span><\/span><\/span>[sys.stdin]<\/code>\uff0c\u8aaa\u660e\u8cc7\u6599\u5728 <\/span><\/span><\/span><\/span><\/span>stdin \u4e0a\u53ef\u7528\u4e86\u3002\u7136\u540e\u5c31\u53ef\u4ee5\u4f7f\u7528\u00a0<\/span><\/span><\/span><\/span><\/span>read<\/code>\u00a0\u65b9\u6cd5\u4f86\u8b80\u53d6\u9019\u4e9b\u8cc7\u6599\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n
select<\/code>\u00a0\u65b9\u6cd5\u4e5f\u53ef\u4ee5\u8655\u7406 <\/span><\/span><\/span><\/span><\/span>socket \u8aaa\u660e\u7b26\u3002\u5728\u4e0b\u9762\u7684\u4f8b\u5b50\uff08\u8acb\u53c3\u95b1\u6e05\u55ae <\/span><\/span><\/span><\/span><\/span>15\uff09\u4e2d\uff0c\u6211\u5011\u5efa\u7acb\u4e86\u5169\u500b\u7528\u6236\u6a5f <\/span><\/span><\/span><\/span><\/span>socket\uff0c\u5e76\u5c07\u5176\u9023\u7dda\u5230\u4e00\u500b\u9060\u7aef\u7aef\u4e0a\u3002\u7136\u540e\u4f7f\u7528\u00a0<\/span><\/span><\/span><\/span><\/span>select<\/code>\u00a0\u65b9\u6cd5\u4f86\u78ba\u5b9a\u54ea\u500b <\/span><\/span><\/span><\/span><\/span>socket \u53ef\u4ee5\u8b80\u53d6\u8cc7\u6599\u4e86\u3002\u63a5\u7740\u53ef\u4ee5\u8b80\u53d6\u9019\u4e9b\u8cc7\u6599\uff0c\u5e76\u5c07\u5176\u5bdf\u770b\u5230 <\/span><\/span><\/span><\/span><\/span>stdout \u4e0a\u3002<\/span><\/span><\/span><\/span><\/span><\/p>\n
<\/a>
\n\u6e05\u55ae <\/b><\/span><\/span><\/span><\/span><\/span>15. <\/b>\u5c55\u793a\u8655\u7406\u591a\u500b <\/b><\/span><\/span><\/span><\/span><\/span>socket <\/b>\u7684 <\/b><\/span><\/span><\/span><\/span><\/span>select <\/b>\u65b9\u6cd5<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n\n\n<\/colgroup>\n\n\n
 
\n
                                        <\/code>\r\nimport socket<\/span><\/span><\/code>\r\nimport select<\/span><\/span><\/code>\r\n\r\nsock1 = <\/span><\/span><\/code>socket.socket<\/b><\/span><\/span><\/code>( socket.AF_INET, socket.SOCK_STREAM )<\/span><\/span><\/code>\r\nsock2 = <\/span><\/span><\/code>socket.socket<\/b><\/span><\/span><\/code>( socket.AF_INET, socket.SOCK_STREAM )<\/span><\/span><\/code>\r\n\r\nsock1.<\/span><\/span><\/code>connect<\/b><\/span><\/span><\/code>( ('192.168.1.1', 25) )<\/span><\/span><\/code>\r\nsock2.<\/span><\/span><\/code>connect<\/b><\/span><\/span><\/code>( ('192.168.1.1', 25) )<\/span><\/span><\/code>\r\n\r\nwhile 1:<\/span><\/span><\/code>\r\n\r\n  <\/code># Await a read event<\/span><\/span><\/code>\r\n  <\/code>rlist, wlist, elist = <\/span><\/span><\/code>select.select<\/b><\/span><\/span><\/code>( [sock1, sock2], [], [], 5 )<\/span><\/span><\/code>\r\n\r\n  <\/code># Test for timeout<\/span><\/span><\/code>\r\n  <\/code>if [rlist, wlist, elist] == [ [], [], [] ]:<\/span><\/span><\/code>\r\n\r\n    <\/code>print \"Five seconds elapsed.\\n\"<\/span><\/span><\/code>\r\n\r\n  <\/code>else:<\/span><\/span><\/code>\r\n\r\n    <\/code># Loop through each socket in rlist, read and print the available data<\/span><\/span><\/code>\r\n    <\/code>for sock in rlist:<\/span><\/span><\/code>\r\n\r\n      <\/code>print sock.<\/span><\/span><\/code>recv<\/b><\/span><\/span><\/code>( 100 )<\/span><\/span><\/code><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"
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