![\"menu-r.4af5f7ec.gif\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250428233044-68100fa42714d.gif\")
<\/p>\n \u672c\u6587\u8fd8\u6709\u914d\u5957\u7684\u7cbe\u54c1\u8d44\u6e90，\u70b9\u51fb\u83b7\u53d6 <\/p>\n
\u7b80\u4ecb：UDP\u662f\u4e00\u79cd\u65e0\u8fde\u63a5\u4e14\u4e0d\u53ef\u9760\u7684\u4f20\u8f93\u534f\u8bae，\u9002\u5408\u5b9e\u65f6\u6027\u8981\u6c42\u9ad8\u7684\u5e94\u7528\u3002\u672c\u6b21\u5b9e\u9a8c\u6d89\u53caUDP\u534f\u8bae\u7684\u901a\u4fe1，\u5305\u62ec\u5ba2\u6237\u7aef\u53d1\u9001\u6570\u636e\u548c\u670d\u52a1\u5668\u63a5\u6536\u6570\u636e\u7684\u8fc7\u7a0b\u3002\u6d4b\u8bd5\u4e2d，\u5ba2\u6237\u7aef\u8fde\u7eed\u53d1\u900110\u4e2a\u6570\u5b57\u7ed9\u670d\u52a1\u5668，\u4ee5\u68c0\u9a8cUDP\u7684\u4f20\u8f93\u6548\u7387\u548c\u51c6\u786e\u6027\u3002\u5b9e\u9a8c\u5c06\u5c55\u793aUDP\u5957\u63a5\u5b57\u7f16\u7a0b\u7684\u5b9e\u9645\u5e94\u7528，\u6db5\u76d6\u521b\u5efa\u5957\u63a5\u5b57\u3001\u6570\u636e\u53d1\u9001\u3001\u63a5\u6536\u4ee5\u53ca\u5982\u4f55\u5904\u7406UDP\u7684\u4e0d\u53ef\u9760\u6027\u7b49\u95ee\u9898\u3002 ![\"UDP\u5b9a\u65f6\u4f20\u8f93\u6570\u5b57\u6d4b\u8bd5--\u5ba2\u6237\u7aef\u53ca\u670d\u52a1\u5668\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250428233044-68100fa447d73.png\")
<\/p>\n
\u7528\u6237\u6570\u636e\u62a5\u534f\u8bae（UDP, User Datagram Protocol）\u662f\u4e92\u8054\u7f51\u534f\u8bae\u5957\u4ef6\u4e2d\u4e00\u79cd\u65e0\u8fde\u63a5\u7684\u4f20\u8f93\u5c42\u534f\u8bae\u3002UDP\u63d0\u4f9b\u4e86\u4e00\u79cd\u5feb\u901f\u3001\u65e0\u5e8f\u548c\u4e0d\u53ef\u9760\u7684\u6d88\u606f\u4f20\u8f93\u670d\u52a1，\u4e3b\u8981\u7528\u4e8e\u9700\u8981\u901f\u5ea6\u4f46\u53ef\u4ee5\u5bb9\u5fcd\u4e22\u5305\u548c\u987a\u5e8f\u9519\u8bef\u7684\u5e94\u7528\u573a\u666f\u3002 <\/p>\n
UDP\u7684\u7a81\u51fa\u7279\u70b9\u5305\u62ec： – \u65e0\u8fde\u63a5 ：\u53d1\u9001\u6570\u636e\u524d\u4e0d\u9700\u8981\u5efa\u7acb\u8fde\u63a5，\u51cf\u5c11\u4e86\u5ef6\u8fdf\u3002 – \u6700\u5c0f\u5f00\u9500 ：\u4e0d\u9700\u8981\u7ef4\u6301\u72b6\u6001\u4fe1\u606f，\u5934\u90e8\u5f00\u9500\u5c0f，\u53ea\u67098\u5b57\u8282\u3002 – \u4f20\u8f93\u901f\u5ea6\u5feb ：\u7531\u4e8e\u51cf\u5c11\u4e86\u5f00\u9500\u548c\u8fde\u63a5\u5efa\u7acb\u7684\u5ef6\u8fdf，\u9002\u5408\u5bf9\u5b9e\u65f6\u6027\u8981\u6c42\u9ad8\u7684\u5e94\u7528\u3002 – \u4e0d\u53ef\u9760\u4f20\u8f93 ：\u4e0d\u4fdd\u8bc1\u6570\u636e\u5305\u7684\u5230\u8fbe\u3001\u987a\u5e8f\u548c\u5b8c\u6574\u6027\u3002 <\/p>\n
UDP\u901a\u5e38\u7528\u4e8e\u4ee5\u4e0b\u573a\u666f： – \u5b9e\u65f6\u89c6\u9891\u548c\u97f3\u9891\u6d41 ：\u5982\u89c6\u9891\u4f1a\u8bae\u548c\u5728\u7ebf\u6e38\u620f，\u5bf9\u5b9e\u65f6\u6027\u7684\u9700\u6c42\u9ad8\u4e8e\u6570\u636e\u5b8c\u6574\u6027\u3002 – \u5e7f\u64ad\u534f\u8bae ：\u5982DHCP\u548cDNS，\u8fd9\u4e9b\u534f\u8bae\u9700\u8981\u5411\u5927\u91cf\u5ba2\u6237\u7aef\u5e7f\u64ad\u4fe1\u606f\u3002 – \u8def\u7531\u534f\u8bae ：\u4f8b\u5982RIP，\u5bf9\u901a\u4fe1\u7684\u5b9e\u65f6\u6027\u548c\u9ad8\u6548\u6027\u6709\u8f83\u9ad8\u8981\u6c42\u3002 <\/p>\n
UDP\u7684\u4f7f\u7528\u573a\u666f\u9700\u8981\u6839\u636e\u5176\u7279\u70b9\u8fdb\u884c\u9009\u62e9\u6027\u5e94\u7528，\u4ee5\u5145\u5206\u53d1\u6325\u5176\u4f18\u52bf\u3002\u5728\u63a5\u4e0b\u6765\u7684\u7ae0\u8282\u4e2d，\u6211\u4eec\u5c06\u6df1\u5165\u63a2\u8ba8UDP\u7684\u7f16\u7a0b\u5b9e\u8df5\u548c\u5e94\u7528，\u4e86\u89e3\u5982\u4f55\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u6709\u6548\u5229\u7528UDP\u534f\u8bae\u3002 <\/p>\n
UDP\u5957\u63a5\u5b57\u7684\u521b\u5efa\u662f\u7f51\u7edc\u7f16\u7a0b\u7684\u57fa\u77f3，\u5b83\u6d89\u53ca\u5230\u7f51\u7edc\u5730\u5740\u7684\u521d\u59cb\u5316\u548c\u7aef\u53e3\u7684\u5206\u914d\u3002\u4ee5\u4e0b\u662f\u521b\u5efaUDP\u5957\u63a5\u5b57\u7684\u4ee3\u7801\u793a\u4f8b： <\/p>\n
#include <sys\/types.h>
\n#include <sys\/socket.h>
\n#include <netinet\/in.h>
\n#include <arpa\/inet.h>
\n#include <unistd.h><\/p>\n
int sockfd;
\nsockfd = socket(AF_INET, SOCK_DGRAM, 0);<\/p>\n
\u5728\u8fd9\u6bb5\u4ee3\u7801\u4e2d， socket() \u51fd\u6570\u7528\u4e8e\u521b\u5efa\u5957\u63a5\u5b57\u3002\u53c2\u6570 AF_INET \u6307\u5b9a\u4f7f\u7528IPv4\u5730\u5740\u3002 SOCK_DGRAM \u8868\u660e\u521b\u5efa\u7684\u662fUDP\u5957\u63a5\u5b57\u3002\u8fd9\u4e2a\u8c03\u7528\u8fd4\u56de\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26，\u7528\u4e8e\u540e\u7eed\u64cd\u4f5c\u3002\u6587\u4ef6\u63cf\u8ff0\u7b26\u662f\u4e00\u4e2a\u975e\u8d1f\u6574\u6570，\u7528\u4e8e\u4ee3\u8868\u548c\u7f51\u7edc\u901a\u8baf\u76f8\u5173\u7684\u8d44\u6e90\u3002 <\/p>\n
\u521b\u5efa\u5957\u63a5\u5b57\u4e4b\u540e，\u901a\u5e38\u9700\u8981\u5c06\u5176\u7ed1\u5b9a\u5230\u4e00\u4e2a\u7279\u5b9a\u7684\u5730\u5740\u548c\u7aef\u53e3\u4e0a\u3002\u8fd9\u4f7f\u5f97\u5176\u4ed6\u5957\u63a5\u5b57\u80fd\u591f\u901a\u8fc7\u8fd9\u4e2a\u5730\u5740\u548c\u7aef\u53e3\u6765\u4e0e\u4e4b\u901a\u4fe1\u3002\u4e0b\u9762\u5c55\u793a\u4e86\u5982\u4f55\u7ed1\u5b9a\u5957\u63a5\u5b57： <\/p>\n
struct sockaddr_in server_addr;
\nmemset(&server_addr, 0, sizeof(server_addr));
\nserver_addr.sin_family = AF_INET;
\nserver_addr.sin_addr.s_addr = htonl(INADDR_ANY);
\nserver_addr.sin_port = htons(12345);<\/p>\n
bind(sockfd, (const struct sockaddr *)&server_addr, sizeof(server_addr));<\/p>\n
\u5728\u8fd9\u6bb5\u4ee3\u7801\u4e2d， sockaddr_in \u7ed3\u6784\u4f53\u5b9a\u4e49\u4e86\u7f51\u7edc\u5730\u5740\u3002 sin_family \u8bbe\u7f6e\u4e3a AF_INET ，\u8868\u793a\u4f7f\u7528IPv4\u3002 sin_addr.s_addr \u8bbe\u7f6e\u4e3a htonl(INADDR_ANY) ，\u8868\u793a\u76d1\u542c\u6240\u6709\u7f51\u7edc\u63a5\u53e3\u3002 sin_port \u8bbe\u7f6e\u4e3a\u8981\u76d1\u542c\u7684\u7aef\u53e3\u53f7，\u8fd9\u91cc\u5047\u8bbe\u4e3a 12345 \u3002\u6700\u540e， bind() \u51fd\u6570\u5c06\u5957\u63a5\u5b57\u7ed1\u5b9a\u5230\u6307\u5b9a\u5730\u5740\u3002 <\/p>\n
\u6570\u636e\u53d1\u9001\u662f\u7f51\u7edc\u901a\u8baf\u4e2d\u7684\u4e00\u9879\u6838\u5fc3\u529f\u80fd\u3002UDP\u901a\u8fc7 sendto() \u51fd\u6570\u53d1\u9001\u6570\u636e\u3002\u4e0b\u9762\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528 sendto() \u51fd\u6570： <\/p>\n
const char* message = "Hello UDP";
\nstruct sockaddr_in dest_addr;
\nmemset(&dest_addr, 0, sizeof(dest_addr));
\ninet_pton(AF_INET, "127.0.0.1", &dest_addr.sin_addr);
\ndest_addr.sin_family = AF_INET;
\ndest_addr.sin_port = htons(54321);<\/p>\n
sendto(sockfd, message, strlen(message), 0, (const struct sockaddr*)&dest_addr, sizeof(dest_addr));<\/p>\n
\u5728\u8fd9\u6bb5\u4ee3\u7801\u4e2d， sendto() \u51fd\u6570\u5c06\u6d88\u606f\u53d1\u9001\u5230\u76ee\u6807\u5730\u5740\u3002\u53c2\u6570\u5305\u62ec\u5957\u63a5\u5b57\u63cf\u8ff0\u7b26\u3001\u8981\u53d1\u9001\u7684\u6570\u636e\u3001\u6570\u636e\u957f\u5ea6\u3001\u6807\u5fd7\u4f4d\u3001\u76ee\u6807\u5730\u5740\u7ed3\u6784\u4f53\u6307\u9488\u53ca\u5176\u5927\u5c0f\u3002\u76ee\u6807\u5730\u5740\u5305\u542b\u76ee\u6807IP\u548c\u7aef\u53e3\u4fe1\u606f\u3002 <\/p>\n
\u63a5\u6536\u6570\u636e\u5bf9\u4e8e\u670d\u52a1\u5668\u6765\u8bf4\u540c\u6837\u91cd\u8981\u3002UDP\u4f7f\u7528 recvfrom() \u51fd\u6570\u6765\u63a5\u6536\u6570\u636e\u3002\u4e0b\u9762\u5c55\u793a\u5982\u4f55\u63a5\u6536\u6570\u636e： <\/p>\n
#define BUFFER_SIZE 1024
\nchar buffer[BUFFER_SIZE];
\nstruct sockaddr_in sender_addr;
\nsocklen_t sender_addr_len = sizeof(sender_addr);<\/p>\n
int n = recvfrom(sockfd, buffer, BUFFER_SIZE, 0, (struct sockaddr*)&sender_addr, &sender_addr_len);
\nif (n > 0) {
\n buffer[n] = '\\\\0'; \/\/ Null-terminate the buffer
\n printf("Received message: %s", buffer);
\n}<\/p>\n
\u5728\u8fd9\u6bb5\u4ee3\u7801\u4e2d， recvfrom() \u51fd\u6570\u7b49\u5f85\u5e76\u63a5\u6536UDP\u6570\u636e\u5305\u3002\u5b83\u5c06\u63a5\u6536\u5230\u7684\u6570\u636e\u5b58\u50a8\u5728\u7f13\u51b2\u533a buffer \u4e2d，\u5e76\u5c06\u53d1\u9001\u8005\u5730\u5740\u586b\u5145\u5230 sender_addr \u4e2d\u3002\u8fd9\u4e2a\u51fd\u6570\u8fd4\u56de\u63a5\u6536\u5230\u7684\u5b57\u8282\u6570，\u53ef\u4ee5\u7528\u6765\u66f4\u65b0\u7f13\u51b2\u533a\u5185\u5bb9\u3002 <\/p>\n
\u7ed3\u675f\u7f51\u7edc\u901a\u8baf\u65f6，\u5e94\u5173\u95ed\u4e0d\u518d\u4f7f\u7528\u7684\u5957\u63a5\u5b57\u4ee5\u91ca\u653e\u7cfb\u7edf\u8d44\u6e90\u3002\u5173\u95ed\u5957\u63a5\u5b57\u4f7f\u7528 close() \u51fd\u6570： <\/p>\n
close(sockfd);<\/p>\n
\u7f51\u7edc\u7f16\u7a0b\u4e2d，\u5f02\u5e38\u5904\u7406\u662f\u975e\u5e38\u5173\u952e\u7684\u90e8\u5206，\u56e0\u4e3a\u7f51\u7edc\u8fde\u63a5\u53ef\u80fd\u56e0\u4e3a\u5404\u79cd\u539f\u56e0\u65ad\u5f00\u6216\u5931\u8d25\u3002\u5728\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u65f6，\u5e94\u5f53\u5bf9\u53ef\u80fd\u51fa\u73b0\u7684\u9519\u8bef\u8fdb\u884c\u5904\u7406，\u4f8b\u5982： <\/p>\n
int result;
\nresult = sendto(sockfd, message, strlen(message), 0, (const struct sockaddr*)&dest_addr, sizeof(dest_addr));
\nif (result < 0) {
\n perror("Send failed");
\n \/\/ Handle error
\n}<\/p>\n
result = recvfrom(sockfd, buffer, BUFFER_SIZE, 0, (struct sockaddr*)&sender_addr, &sender_addr_len);
\nif (result < 0) {
\n perror("Receive failed");
\n \/\/ Handle error
\n}<\/p>\n
\u5728\u4e0a\u8ff0\u4ee3\u7801\u6bb5\u4e2d，\u901a\u8fc7\u68c0\u67e5 sendto() \u548c recvfrom() \u51fd\u6570\u7684\u8fd4\u56de\u503c\u6765\u5224\u65ad\u64cd\u4f5c\u662f\u5426\u6210\u529f\u3002\u5982\u679c\u8fd4\u56de\u503c\u5c0f\u4e8e0，\u5219\u8868\u793a\u6709\u9519\u8bef\u53d1\u751f，\u901a\u8fc7 perror() \u51fd\u6570\u53ef\u4ee5\u6253\u5370\u9519\u8bef\u4fe1\u606f，\u8fdb\u4e00\u6b65\u5730，\u7a0b\u5e8f\u53ef\u4ee5\u5904\u7406\u8fd9\u4e9b\u5f02\u5e38\u60c5\u51b5，\u5982\u91cd\u8bd5\u6216\u8bb0\u5f55\u65e5\u5fd7\u3002 <\/p>\n
\u901a\u8fc7\u672c\u7ae0\u8282\u7684\u4ecb\u7ecd，\u6211\u4eec\u5b66\u4e60\u4e86UDP\u5957\u63a5\u5b57\u7f16\u7a0b\u7684\u57fa\u672c\u6b65\u9aa4，\u5305\u62ec\u5957\u63a5\u5b57\u7684\u521b\u5efa\u548c\u7ed1\u5b9a\u3001\u6570\u636e\u7684\u53d1\u9001\u548c\u63a5\u6536\u4ee5\u53ca\u5957\u63a5\u5b57\u7684\u5173\u95ed\u548c\u5f02\u5e38\u5904\u7406\u3002\u8fd9\u4e9b\u6b65\u9aa4\u662f\u5b9e\u73b0\u7f51\u7edc\u901a\u8baf\u7684\u57fa\u7840，\u4e0b\u4e00\u7ae0\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u901a\u4fe1\u6d41\u7a0b\u3002 <\/p>\n
\u5ba2\u6237\u7aef\u9996\u5148\u9700\u8981\u521b\u5efa\u4e00\u4e2aUDP\u5957\u63a5\u5b57，\u8fd9\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528 socket() \u51fd\u6570\u6765\u5b8c\u6210\u3002\u521b\u5efa\u5957\u63a5\u5b57\u662f\u901a\u4fe1\u7684\u7b2c\u4e00\u6b65，\u4e3a\u540e\u7eed\u7684\u6570\u636e\u53d1\u9001\u548c\u63a5\u6536\u5960\u5b9a\u4e86\u57fa\u7840\u3002 <\/p>\n
#include <sys\/types.h>
\n#include <sys\/socket.h>
\n#include <netinet\/in.h>
\n#include <arpa\/inet.h>
\n#include <unistd.h>
\n#include <string.h>
\n#include <stdio.h><\/p>\n
int sockfd;
\nsockfd = socket(AF_INET, SOCK_DGRAM, 0);
\nif (sockfd < 0) {
\n perror("ERROR opening socket");
\n exit(1);
\n}<\/p>\n
\u5728\u8fd9\u6bb5\u4ee3\u7801\u4e2d， AF_INET \u6307\u5b9a\u4e86\u5730\u5740\u65cf\u4e3aIPv4， SOCK_DGRAM \u8868\u793a\u521b\u5efa\u7684\u662f\u4e00\u4e2aUDP\u7c7b\u578b\u7684\u5957\u63a5\u5b57\u3002\u5982\u679c\u521b\u5efa\u6210\u529f，\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u6574\u6570\u578b\u7684\u5957\u63a5\u5b57\u63cf\u8ff0\u7b26，\u5426\u5219\u8fd4\u56de-1，\u5e76\u901a\u8fc7 perror() \u51fd\u6570\u6253\u5370\u51fa\u9519\u8bef\u4fe1\u606f\u3002 <\/p>\n
\u7ed1\u5b9a\u5957\u63a5\u5b57\u4e0d\u662fUDP\u901a\u4fe1\u7684\u5fc5\u9700\u6b65\u9aa4，\u56e0\u4e3aUDP\u662f\u4e00\u79cd\u65e0\u8fde\u63a5\u7684\u534f\u8bae，\u4e0d\u8fc7\u7ed1\u5b9a\u53ef\u4ee5\u6307\u5b9a\u4e00\u4e2a\u7aef\u53e3，\u4f7f\u5f97\u8be5\u5957\u63a5\u5b57\u53ea\u63a5\u53d7\u6765\u81ea\u7279\u5b9a\u7aef\u53e3\u7684\u6570\u636e\u3002\u5728\u5ba2\u6237\u7aef\u901a\u5e38\u4e0d\u8fdb\u884c\u7ed1\u5b9a，\u9664\u975e\u6709\u7279\u6b8a\u9700\u6c42\u3002 <\/p>\n
struct sockaddr_in servaddr;
\nmemset(&servaddr, 0, sizeof(servaddr));
\nservaddr.sin_family = AF_INET;
\nservaddr.sin_addr.s_addr = inet_addr("127.0.0.1");
\nservaddr.sin_port = htons(12345);<\/p>\n
if (bind(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0) {
\n perror("ERROR on binding");
\n close(sockfd);
\n exit(1);
\n}<\/p>\n
\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d，\u6211\u4eec\u6784\u5efa\u4e86\u4e00\u4e2a sockaddr_in \u7ed3\u6784\u4f53 servaddr ，\u8bbe\u7f6e\u4e86\u5730\u5740\u65cf\u3001IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\u3002 inet_addr() \u7528\u4e8e\u5c06\u70b9\u5206\u5341\u8fdb\u5236\u7684IP\u5730\u5740\u8f6c\u6362\u4e3a\u7f51\u7edc\u5b57\u8282\u5e8f\u7684\u5730\u5740， htons() \u7528\u4e8e\u5c06\u4e3b\u673a\u5b57\u8282\u5e8f\u7684\u7aef\u53e3\u53f7\u8f6c\u6362\u4e3a\u7f51\u7edc\u5b57\u8282\u5e8f\u3002 <\/p>\n
\u5ba2\u6237\u7aef\u4f7f\u7528 sendto() \u51fd\u6570\u53d1\u9001\u6570\u636e\u5230\u670d\u52a1\u5668\u3002\u8fd9\u4e2a\u51fd\u6570\u9664\u4e86\u9700\u8981\u5305\u542b\u6570\u636e\u5185\u5bb9\u5916，\u8fd8\u9700\u8981\u6307\u5b9a\u76ee\u6807\u670d\u52a1\u5668\u7684\u5730\u5740\u548c\u7aef\u53e3\u3002 <\/p>\n
const char *message = "Hello, UDP Server!";
\nstruct sockaddr_in destAddr;
\nmemset(&destAddr, 0, sizeof(destAddr));
\ndestAddr.sin_family = AF_INET;
\ndestAddr.sin_port = htons(12345);
\ninet_pton(AF_INET, "127.0.0.1", &destAddr.sin_addr);<\/p>\n
if (sendto(sockfd, message, strlen(message), 0,
\n (struct sockaddr *)&destAddr, sizeof(destAddr)) < 0) {
\n perror("ERROR on sendto");
\n close(sockfd);
\n exit(1);
\n}<\/p>\n
\u5728\u8fd9\u6bb5\u4ee3\u7801\u4e2d，\u6211\u4eec\u9996\u5148\u5b9a\u4e49\u4e86\u8981\u53d1\u9001\u7684\u6d88\u606f，\u7136\u540e\u6784\u5efa\u4e86\u76ee\u6807\u5730\u5740\u7ed3\u6784\u4f53 destAddr \u3002\u4f7f\u7528 sendto() \u53d1\u9001\u6570\u636e\u65f6，\u9664\u4e86\u6570\u636e\u672c\u8eab\u5916，\u8fd8\u9700\u8981\u6307\u5b9a\u76ee\u6807\u5730\u5740\u4fe1\u606f\u3002\u5982\u679c\u53d1\u9001\u6210\u529f，\u8fd4\u56de\u53d1\u9001\u7684\u5b57\u8282\u6570，\u5426\u5219\u8fd4\u56de-1\u5e76\u4ea7\u751f\u9519\u8bef\u3002 <\/p>\n
\u5ba2\u6237\u7aef\u4f7f\u7528 recvfrom() \u51fd\u6570\u63a5\u6536\u6765\u81ea\u670d\u52a1\u5668\u7684\u6570\u636e\u3002\u8fd9\u4e2a\u51fd\u6570\u662f\u4e00\u4e2a\u963b\u585e\u8c03\u7528，\u76f4\u5230\u6536\u5230\u6570\u636e\u624d\u4f1a\u8fd4\u56de\u3002 <\/p>\n
struct sockaddr_in srcAddr;
\nsocklen_t srcAddr_len = sizeof(srcAddr);
\nchar buffer[1024];
\nint n;<\/p>\n
n = recvfrom(sockfd, buffer, sizeof(buffer), 0,
\n (struct sockaddr *) &srcAddr, &srcAddr_len);<\/p>\n
if (n < 0) {
\n perror("ERROR on recvfrom");
\n close(sockfd);
\n exit(1);
\n}<\/p>\n
buffer[n] = '\\\\0';
\nprintf("Received message: %s\\\\n", buffer);<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d，\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u8db3\u591f\u5927\u7684\u7f13\u51b2\u533a\u6765\u5b58\u50a8\u53ef\u80fd\u63a5\u6536\u5230\u7684\u6570\u636e\u3002 recvfrom() \u51fd\u6570\u7684\u8fd4\u56de\u503c\u662f\u5b9e\u9645\u63a5\u6536\u5230\u7684\u5b57\u8282\u6570，\u800c\u63a5\u6536\u5230\u7684\u6570\u636e\u5b58\u653e\u5728 buffer \u4e2d\u3002\u5982\u679c\u8c03\u7528\u6210\u529f，\u6211\u4eec\u53ef\u4ee5\u6253\u5370\u51fa\u6536\u5230\u7684\u6d88\u606f\u3002 <\/p>\n
\u6570\u636e\u901a\u4fe1\u5b8c\u6210\u540e，\u5ba2\u6237\u7aef\u9700\u8981\u5173\u95ed\u5957\u63a5\u5b57\u6765\u91ca\u653e\u8d44\u6e90\u3002 <\/p>\n
close(sockfd);<\/p>\n
\u8fd9\u884c\u4ee3\u7801\u975e\u5e38\u7b80\u5355，\u53ea\u9700\u8981\u8c03\u7528 close() \u51fd\u6570\u5e76\u4f20\u5165\u4e4b\u524d\u521b\u5efa\u7684\u5957\u63a5\u5b57\u63cf\u8ff0\u7b26\u5373\u53ef\u3002\u5173\u95ed\u5957\u63a5\u5b57\u540e，\u7cfb\u7edf\u4f1a\u91ca\u653e\u4e0e\u8be5\u5957\u63a5\u5b57\u76f8\u5173\u7684\u6240\u6709\u8d44\u6e90\u3002 <\/p>\n
\u670d\u52a1\u5668\u5de5\u4f5c\u6d41\u7a0b\u7684\u5f00\u59cb\u4e0e\u5ba2\u6237\u7aef\u7c7b\u4f3c，\u4e5f\u9700\u8981\u521b\u5efa\u4e00\u4e2aUDP\u5957\u63a5\u5b57\u3002 <\/p>\n
int sockfd;
\nsockfd = socket(AF_INET, SOCK_DGRAM, 0);
\nif (sockfd < 0) {
\n perror("ERROR opening socket");
\n exit(1);
\n}<\/p>\n
\u670d\u52a1\u5668\u5fc5\u987b\u7ed1\u5b9a\u5957\u63a5\u5b57\u5230\u4e00\u4e2a\u7279\u5b9a\u7684\u7aef\u53e3\u4e0a，\u8fd9\u6837\u5b83\u624d\u80fd\u63a5\u6536\u5ba2\u6237\u7aef\u53d1\u9001\u5230\u8fd9\u4e2a\u7aef\u53e3\u7684\u6570\u636e\u3002 <\/p>\n
struct sockaddr_in servaddr;
\nmemset(&servaddr, 0, sizeof(servaddr));
\nservaddr.sin_family = AF_INET;
\nservaddr.sin_addr.s_addr = htonl(INADDR_ANY);
\nservaddr.sin_port = htons(12345);<\/p>\n
if (bind(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0) {
\n perror("ERROR on binding");
\n close(sockfd);
\n exit(1);
\n}<\/p>\n
\u5728\u8fd9\u6bb5\u4ee3\u7801\u4e2d，\u6211\u4eec\u4f7f\u7528\u4e86 htonl(INADDR_ANY) \u6765\u544a\u8bc9\u7cfb\u7edf\u63a5\u6536\u4efb\u4f55\u53d1\u9001\u5230\u8be5\u7aef\u53e3\u7684\u6570\u636e，\u65e0\u8bba\u6570\u636e\u6765\u81ea\u54ea\u4e2aIP\u5730\u5740\u3002 INADDR_ANY \u4ee3\u8868\u4e00\u4e2aIP\u5730\u5740，\u8868\u793a\u670d\u52a1\u5668\u5c06\u4f1a\u76d1\u542c\u6240\u6709\u7f51\u7edc\u63a5\u53e3\u4e0a\u7684\u6307\u5b9a\u7aef\u53e3\u3002 <\/p>\n
\u867d\u7136UDP\u534f\u8bae\u662f\u65e0\u8fde\u63a5\u7684，\u4f46\u670d\u52a1\u5668\u9700\u8981"\u76d1\u542c"\u7aef\u53e3\u4ee5\u63a5\u6536\u6570\u636e\u5305\u3002\u5728UDP\u4e2d，\u8fd9\u4e2a\u8fc7\u7a0b\u5b9e\u8d28\u4e0a\u662f\u901a\u8fc7\u7b49\u5f85 recvfrom() \u51fd\u6570\u7684\u8c03\u7528\u6765\u5b8c\u6210\u7684\u3002 <\/p>\n
\u670d\u52a1\u5668\u4f7f\u7528 recvfrom() \u51fd\u6570\u6765\u76d1\u542c\u5e76\u63a5\u6536\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\u3002 <\/p>\n
struct sockaddr_in cliAddr;
\nsocklen_t cliAddr_len = sizeof(cliAddr);
\nchar buffer[1024];
\nint n;<\/p>\n
n = recvfrom(sockfd, buffer, sizeof(buffer), 0,
\n (struct sockaddr *) &cliAddr, &cliAddr_len);<\/p>\n
if (n < 0) {
\n perror("ERROR on recvfrom");
\n close(sockfd);
\n exit(1);
\n}<\/p>\n
buffer[n] = '\\\\0';
\nprintf("Received message: %s from IP address: %s, Port: %d\\\\n",
\n buffer, inet_ntoa(cliAddr.sin_addr), ntohs(cliAddr.sin_port));<\/p>\n
\u5f53\u670d\u52a1\u5668\u4f7f\u7528 recvfrom() \u51fd\u6570\u63a5\u6536\u5230\u6570\u636e\u540e，\u5b83\u4f1a\u5c06\u6570\u636e\u5b58\u50a8\u5728 buffer \u4e2d，\u5e76\u6253\u5370\u51fa\u63a5\u6536\u5230\u7684\u6d88\u606f\u53ca\u5176\u6765\u6e90\u7684IP\u5730\u5740\u548c\u7aef\u53e3\u3002 <\/p>\n
\u670d\u52a1\u5668\u5904\u7406\u63a5\u6536\u5230\u7684\u6570\u636e\u540e，\u53ef\u4ee5\u901a\u8fc7\u4e4b\u524d\u4fdd\u5b58\u7684\u5ba2\u6237\u7aef\u5730\u5740\u4fe1\u606f\u4f7f\u7528 sendto() \u51fd\u6570\u6765\u56de\u590d\u5ba2\u6237\u7aef\u3002 <\/p>\n
const char *response = "UDP Server: Message received!";
\nsendto(sockfd, response, strlen(response), 0,
\n (struct sockaddr *)&cliAddr, sizeof(cliAddr));<\/p>\n
\u5728\u5b8c\u6210\u6570\u636e\u7684\u53d1\u9001\u548c\u63a5\u6536\u540e，\u670d\u52a1\u5668\u4e5f\u9700\u8981\u5173\u95ed\u5957\u63a5\u5b57，\u91ca\u653e\u76f8\u5173\u8d44\u6e90\u3002 <\/p>\n
close(sockfd);<\/p>\n
\u672c\u7ae0\u8282\u8be6\u7ec6\u4ecb\u7ecd\u4e86\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7aef\u4e4b\u95f4\u7684UDP\u901a\u4fe1\u6d41\u7a0b，\u89e3\u91ca\u4e86\u5728\u4ee3\u7801\u5c42\u9762\u5982\u4f55\u5b9e\u73b0\u8fd9\u4e00\u8fc7\u7a0b，\u5e76\u5bf9\u4e3b\u8981\u7684\u4ee3\u7801\u6bb5\u8fdb\u884c\u4e86\u9010\u4e00\u89e3\u8bfb\u3002\u8fd9\u6837\u7684\u5b9e\u8df5\u80fd\u591f\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u8fd0\u7528UDP\u901a\u4fe1\u673a\u5236\u3002 <\/p>\n
\u6570\u636e\u5c01\u88c5\u662f\u7f51\u7edc\u901a\u4fe1\u4e2d\u7684\u6838\u5fc3\u6982\u5ff5，\u5b83\u6d89\u53ca\u5230\u5c06\u5e94\u7528\u5c42\u7684\u6570\u636e\u7ed3\u6784\u8f6c\u5316\u6210\u53ef\u4ee5\u5728\u7f51\u7edc\u4e0a\u53d1\u9001\u7684\u683c\u5f0f\u3002\u5bf9\u4e8eUDP\u534f\u8bae\u800c\u8a00，\u6570\u636e\u5c01\u88c5\u5305\u62ec\u5c06\u5e94\u7528\u5c42\u7684\u6d88\u606f\u6216\u6570\u636e\u5305\u88c5\u5728UDP\u6570\u636e\u62a5\u4e2d，\u968f\u540e\u518d\u5c06UDP\u6570\u636e\u62a5\u5305\u88c5\u5728IP\u6570\u636e\u62a5\u4e2d，\u6700\u540e\u901a\u8fc7\u7f51\u7edc\u786c\u4ef6\u53d1\u9001\u51fa\u53bb\u3002 <\/p>\n
import socket<\/p>\n
# \u521b\u5efaUDP\u5957\u63a5\u5b57
\nsock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)<\/p>\n
# \u6307\u5b9a\u670d\u52a1\u5668\u5730\u5740\u4fe1\u606f
\nserver_address = ('localhost', 10000)<\/p>\n
# \u5b9a\u4e49\u6570\u636e\u62a5\u5185\u5bb9
\nmessage = 'Hello, UDP server'<\/p>\n
try:
\n # \u53d1\u9001\u6570\u636e
\n sock.sendto(message.encode(), server_address)
\nexcept Exception as e:
\n print(f"\u53d1\u9001\u5931\u8d25: {e}")<\/p>\n
# \u5173\u95ed\u5957\u63a5\u5b57
\nsock.close()<\/p>\n
\u5728\u4e0a\u8ff0Python\u4ee3\u7801\u4e2d，\u6211\u4eec\u4f7f\u7528\u4e86UDP\u5957\u63a5\u5b57 socket \u6765\u53d1\u9001\u6570\u636e\u3002\u9996\u5148，\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2aUDP\u5957\u63a5\u5b57\u3002\u7136\u540e，\u6211\u4eec\u6307\u5b9a\u4e86\u670d\u52a1\u5668\u7684\u5730\u5740\u548c\u7aef\u53e3，\u5e76\u51c6\u5907\u4e86\u8981\u53d1\u9001\u7684\u6570\u636e\u3002\u8c03\u7528 sendto \u65b9\u6cd5\u540e，\u6570\u636e\u88ab\u5c01\u88c5\u6210UDP\u6570\u636e\u62a5，\u5e76\u901a\u8fc7\u7f51\u7edc\u53d1\u9001\u3002 <\/p>\n
\u5c01\u88c5\u8fc7\u7a0b\u5305\u62ec\u6dfb\u52a0UDP\u5934\u90e8\u4fe1\u606f，\u5982\u6e90\u7aef\u53e3\u548c\u76ee\u6807\u7aef\u53e3，\u4ee5\u53ca\u68c0\u9a8c\u548c，\u4ee5\u786e\u4fdd\u6570\u636e\u7684\u5b8c\u6574\u6027\u548c\u6b63\u786e\u6027\u3002UDP\u5934\u90e8\u901a\u5e38\u5305\u542b8\u4e2a\u5b57\u8282，\u5176\u4e2d\u6e90\u7aef\u53e3\u548c\u76ee\u6807\u7aef\u53e3\u5404\u53602\u4e2a\u5b57\u8282，\u957f\u5ea6\u5b57\u6bb5\u548c\u68c0\u9a8c\u548c\u5404\u53602\u4e2a\u5b57\u8282\u3002 <\/p>\n
\u6570\u636e\u5c01\u88c5\u4e0d\u4ec5\u786e\u4fdd\u4e86\u6570\u636e\u683c\u5f0f\u5728\u5404\u5c42\u4e4b\u95f4\u7684\u4e00\u81f4\u6027，\u4e5f\u63d0\u4f9b\u4e86\u5fc5\u8981\u7684\u4fe1\u606f，\u5982\u7aef\u53e3\u4fe1\u606f\u548c\u68c0\u9a8c\u548c，\u4ee5\u4fbf\u5728\u63a5\u6536\u7aef\u80fd\u591f\u6b63\u786e\u89e3\u6790\u6570\u636e\u5e76\u68c0\u67e5\u6570\u636e\u7684\u5b8c\u6574\u6027\u3002\u5c01\u88c5\u8fc7\u7a0b\u5bf9\u4e8e\u4fdd\u969c\u901a\u4fe1\u7684\u987a\u7545\u548c\u6570\u636e\u7684\u51c6\u786e\u6027\u81f3\u5173\u91cd\u8981\u3002 <\/p>\n
\u6570\u636e\u89e3\u6790\u662f\u5c06\u63a5\u6536\u5230\u7684\u7f51\u7edc\u6570\u636e\u62a5\u89e3\u5305\u5e76\u8fd8\u539f\u4e3a\u5e94\u7528\u5c42\u80fd\u591f\u7406\u89e3\u7684\u6570\u636e\u683c\u5f0f\u3002\u5728UDP\u901a\u4fe1\u4e2d，\u63a5\u6536\u7aef\u63a5\u6536\u5230UDP\u6570\u636e\u62a5\u4e4b\u540e，\u9700\u8981\u63d0\u53d6\u51fa\u5b9e\u9645\u4f20\u8f93\u7684\u6570\u636e\u5185\u5bb9，\u8fd9\u4e00\u6b65\u79f0\u4e3a\u6570\u636e\u89e3\u6790\u3002 <\/p>\n
import socket<\/p>\n
# \u521b\u5efaUDP\u5957\u63a5\u5b57
\nsock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)<\/p>\n
# \u7ed1\u5b9a\u672c\u5730\u5730\u5740\u548c\u7aef\u53e3
\nlocal_address = ('localhost', 10001)
\nsock.bind(local_address)<\/p>\n
try:
\n while True:
\n # \u63a5\u6536\u6570\u636e\u53ca\u53d1\u9001\u65b9\u5730\u5740\u4fe1\u606f
\n data, address = sock.recvfrom(4096)
\n print(f"\u4ece{address}\u63a5\u6536\u5230\u6570\u636e: {data.decode()}")<\/p>\n
except KeyboardInterrupt:
\n print("\u7a0b\u5e8f\u7ec8\u6b62")<\/p>\n
# \u5173\u95ed\u5957\u63a5\u5b57
\nsock.close()<\/p>\n
\u5728\u63a5\u6536\u7aef，\u6211\u4eec\u901a\u8fc7\u8c03\u7528 recvfrom \u65b9\u6cd5\u6765\u63a5\u6536\u6570\u636e，\u5e76\u5c06\u5176\u89e3\u5305，\u4ee5\u83b7\u53d6\u5b9e\u9645\u7684\u53d1\u9001\u6570\u636e\u3002\u5728\u89e3\u6790\u8fc7\u7a0b\u4e2d，\u6211\u4eec\u80fd\u591f\u786e\u8ba4\u6570\u636e\u7684\u53d1\u9001\u6765\u6e90，\u5e76\u63d0\u53d6\u6570\u636e\u5185\u5bb9\u4f9b\u540e\u7eed\u5904\u7406\u3002 <\/p>\n
\u6b63\u786e\u5730\u89e3\u6790\u6570\u636e\u662f\u786e\u4fdd\u5e94\u7528\u5c42\u80fd\u591f\u65e0\u8bef\u5730\u83b7\u53d6\u5230\u539f\u59cb\u6d88\u606f\u7684\u5173\u952e\u3002\u6ca1\u6709\u6709\u6548\u7684\u6570\u636e\u89e3\u6790\u673a\u5236，\u63a5\u6536\u7aef\u53ef\u80fd\u65e0\u6cd5\u6b63\u786e\u5904\u7406\u53d1\u9001\u7684\u6570\u636e，\u5bfc\u81f4\u901a\u4fe1\u5931\u8d25\u3002\u89e3\u6790\u5de5\u4f5c\u4e0d\u4ec5\u5305\u62ec\u6570\u636e\u7684\u5206\u79bb，\u8fd8\u5305\u62ec\u5bf9\u6570\u636e\u7684\u5b8c\u6574\u6027\u548c\u6b63\u786e\u6027\u7684\u6821\u9a8c\u3002 <\/p>\n
\u968f\u7740\u7f51\u7edc\u5e94\u7528\u7684\u590d\u6742\u6027\u589e\u52a0，\u6570\u636e\u5c01\u88c5\u4e0e\u89e3\u6790\u6280\u672f\u4e5f\u53d8\u5f97\u65e5\u76ca\u590d\u6742\u3002\u4f8b\u5982，\u4f7f\u7528JSON\u3001XML\u6216\u8005Protocol Buffers\u7b49\u6570\u636e\u683c\u5f0f\u53ef\u4ee5\u5728\u5e94\u7528\u5c42\u4e4b\u95f4\u4ea4\u6362\u7ed3\u6784\u5316\u6570\u636e，\u5b83\u4eec\u9700\u8981\u7279\u5b9a\u7684\u5e93\u8fdb\u884c\u89e3\u6790\u3002 <\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528JSON\u683c\u5f0f\u8fdb\u884c\u6570\u636e\u5c01\u88c5\u4e0e\u89e3\u6790\u7684\u793a\u4f8b： <\/p>\n
import json
\nimport socket<\/p>\n
# \u521b\u5efaUDP\u5957\u63a5\u5b57
\nsock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)<\/p>\n
# \u51c6\u5907\u53d1\u9001\u7684\u7ed3\u6784\u5316\u6570\u636e
\ndata = {
\n 'name': 'Alice',
\n 'age': 25,
\n 'city': 'Wonderland'
\n}<\/p>\n
# \u5c01\u88c5\u6570\u636e
\ndata_json = json.dumps(data).encode()
\nserver_address = ('localhost', 10000)
\nsock.sendto(data_json, server_address)<\/p>\n
# \u5173\u95ed\u5957\u63a5\u5b57
\nsock.close()<\/p>\n
\u5728\u63a5\u6536\u7aef，\u6211\u4eec\u5c06\u6536\u5230\u7684\u6570\u636e\u8fdb\u884c\u89e3\u6790，\u8f6c\u6362\u56de\u539f\u59cb\u7684Python\u5b57\u5178： <\/p>\n
import json
\nimport socket<\/p>\n
# \u521b\u5efaUDP\u5957\u63a5\u5b57
\nsock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)<\/p>\n
# \u7ed1\u5b9a\u672c\u5730\u5730\u5740\u548c\u7aef\u53e3
\nlocal_address = ('localhost', 10001)
\nsock.bind(local_address)<\/p>\n
try:
\n while True:
\n data_json, address = sock.recvfrom(4096)
\n # \u89e3\u6790JSON\u6570\u636e
\n data = json.loads(data_json.decode())
\n print(f"\u63a5\u6536\u5230\u7684\u6570\u636e: {data}")<\/p>\n
except KeyboardInterrupt:
\n print("\u7a0b\u5e8f\u7ec8\u6b62")<\/p>\n
# \u5173\u95ed\u5957\u63a5\u5b57
\nsock.close()<\/p>\n
\u6570\u636e\u5c01\u88c5\u4e0e\u89e3\u6790\u662f\u786e\u4fdd\u6570\u636e\u5728\u7f51\u7edc\u4e2d\u6b63\u786e\u4f20\u9012\u7684\u91cd\u8981\u6b65\u9aa4，\u5b83\u4eec\u4fdd\u969c\u4e86\u6570\u636e\u7684\u5b8c\u6574\u6027\u548c\u53ef\u7406\u89e3\u6027，\u4e3a\u7f51\u7edc\u901a\u4fe1\u6253\u4e0b\u575a\u5b9e\u57fa\u7840\u3002 <\/p>\n
UDP（\u7528\u6237\u6570\u636e\u62a5\u534f\u8bae）\u662f\u4e00\u4e2a\u65e0\u8fde\u63a5\u7684\u534f\u8bae，\u8fd9\u4e0eTCP\u534f\u8bae\u7684\u9762\u5411\u8fde\u63a5\u7279\u6027\u5f62\u6210\u9c9c\u660e\u5bf9\u6bd4\u3002\u65e0\u8fde\u63a5\u7684\u7279\u70b9\u610f\u5473\u7740\u5728\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u4e4b\u524d，\u4e0d\u9700\u8981\u5efa\u7acb\u4e00\u4e2a\u7a33\u5b9a\u7684\u8fde\u63a5\u901a\u9053\u3002\u6bcf\u4e00\u6761\u6d88\u606f\u90fd\u662f\u72ec\u7acb\u53d1\u9001\u7684，\u63a5\u6536\u7aef\u4e5f\u4e0d\u4f1a\u4e3a\u6bcf\u4e00\u6761\u6d88\u606f\u7ef4\u6301\u72b6\u6001\u6216\u786e\u8ba4\u63a5\u6536\u3002 <\/p>\n
\u7531\u4e8eUDP\u7684\u65e0\u8fde\u63a5\u7279\u6027，\u5e94\u7528\u5c42\u9700\u8981\u5904\u7406\u4e0e\u8fde\u63a5\u65e0\u5173\u7684\u591a\u79cd\u60c5\u51b5\u3002\u4f8b\u5982，\u5728\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u65f6，\u9700\u8981\u81ea\u884c\u5b9e\u73b0\u5206\u5305\u548c\u91cd\u7ec4\u673a\u5236，\u56e0\u4e3aUDP\u4e0d\u4fdd\u8bc1\u6d88\u606f\u7684\u5b8c\u6574\u6027\u548c\u987a\u5e8f\u3002\u6b64\u5916，\u4e3a\u4e86\u907f\u514d\u6570\u636e\u5305\u4e22\u5931\u6216\u9519\u5e8f，\u53d1\u9001\u7aef\u53ef\u4ee5\u5b9e\u73b0\u4e00\u4e2a\u786e\u8ba4\u673a\u5236，\u4ee5\u786e\u4fdd\u6570\u636e\u6210\u529f\u5230\u8fbe\u63a5\u6536\u7aef\u3002 <\/p>\n
\u4e0eTCP\u4e0d\u540c，UDP\u4e0d\u4fdd\u8bc1\u6570\u636e\u5305\u7684\u6210\u529f\u4f20\u9012，\u4e5f\u4e0d\u4f1a\u81ea\u52a8\u91cd\u65b0\u53d1\u9001\u4e22\u5931\u7684\u6570\u636e\u5305\u3002\u6570\u636e\u5305\u53ef\u80fd\u4f1a\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u4e22\u5931，\u6216\u8005\u56e0\u4e3a\u7f51\u7edc\u62e5\u585e\u800c\u88ab\u4e22\u5f03\u3002\u6b64\u5916，\u6570\u636e\u5305\u53ef\u80fd\u4f1a\u9519\u5e8f\u5230\u8fbe，\u6216\u8005\u91cd\u590d\u63a5\u6536\u3002 <\/p>\n
\u4e3a\u4e86\u5904\u7406UDP\u7684\u4e0d\u53ef\u9760\u6027，\u5f00\u53d1\u8005\u901a\u5e38\u4f1a\u91c7\u7528\u4ee5\u4e0b\u51e0\u79cd\u65b9\u6cd5： <\/p>\n
graph TD
\n A[\u5f00\u59cb] –> B[\u53d1\u9001UDP\u6570\u636e\u5305]
\n B –> C{\u786e\u8ba4\u6536\u5230?}
\n C –> |\u662f| D[\u5904\u7406\u4e0b\u4e00\u4e2a\u5305]
\n C –> |\u5426| E[\u542f\u52a8\u91cd\u8bd5\u5b9a\u65f6\u5668]
\n E –> |\u8d85\u65f6| B
\n E –> |\u6536\u5230\u786e\u8ba4| D<\/p>\n
\u4e00\u4e2a\u5e38\u89c1\u7684\u5e94\u7528\u5c42\u534f\u8bae\u8bbe\u8ba1\u5b9e\u4f8b\u662fTFTP（\u7b80\u5355\u6587\u4ef6\u4f20\u8f93\u534f\u8bae）\u3002TFTP\u534f\u8bae\u901a\u8fc7\u5b9a\u4e49\u4e00\u7cfb\u5217\u7684\u8bf7\u6c42\u548c\u5e94\u7b54\u64cd\u4f5c\u6765\u4fdd\u8bc1\u6570\u636e\u4f20\u8f93\u7684\u53ef\u9760\u6027\u3002\u4f8b\u5982，\u5b83\u4f7f\u7528\u4e86\u786e\u8ba4（ACK）\u5305\u6765\u544a\u77e5\u53d1\u9001\u7aef\u6570\u636e\u5df2\u7ecf\u88ab\u63a5\u6536，\u5982\u679c\u53d1\u9001\u7aef\u5728\u89c4\u5b9a\u65f6\u95f4\u5185\u6ca1\u6709\u6536\u5230\u786e\u8ba4，\u5219\u4f1a\u91cd\u65b0\u53d1\u9001\u6570\u636e\u5305\u3002 <\/p>\n
UDP\u65e0\u8fde\u63a5\u548c\u4e0d\u53ef\u9760\u6027\u7684\u5904\u7406\u7b56\u7565\u662f\u7f51\u7edc\u7f16\u7a0b\u4e2d\u7684\u5173\u952e\u90e8\u5206，\u5c24\u5176\u662f\u5728\u8bbe\u8ba1\u9ad8\u6548\u7387\u3001\u4f4e\u5ef6\u8fdf\u7684\u7f51\u7edc\u5e94\u7528\u65f6\u3002\u901a\u8fc7\u5728\u5e94\u7528\u5c42\u5b9e\u73b0\u9002\u5f53\u7684\u673a\u5236，\u53ef\u4ee5\u786e\u4fdd\u5373\u4f7f\u5728\u4e0d\u53ef\u9760\u7684\u7f51\u7edc\u73af\u5883\u4e0b，\u5e94\u7528\u4ecd\u7136\u80fd\u591f\u53ef\u9760\u5730\u901a\u4fe1\u3002 <\/p>\n
\u672c\u6587\u8fd8\u6709\u914d\u5957\u7684\u7cbe\u54c1\u8d44\u6e90，\u70b9\u51fb\u83b7\u53d6 <\/p>\n
\u7b80\u4ecb：UDP\u662f\u4e00\u79cd\u65e0\u8fde\u63a5\u4e14\u4e0d\u53ef\u9760\u7684\u4f20\u8f93\u534f\u8bae，\u9002\u5408\u5b9e\u65f6\u6027\u8981\u6c42\u9ad8\u7684\u5e94\u7528\u3002\u672c\u6b21\u5b9e\u9a8c\u6d89\u53caUDP\u534f\u8bae\u7684\u901a\u4fe1，\u5305\u62ec\u5ba2\u6237\u7aef\u53d1\u9001\u6570\u636e\u548c\u670d\u52a1\u5668\u63a5\u6536\u6570\u636e\u7684\u8fc7\u7a0b\u3002\u6d4b\u8bd5\u4e2d，\u5ba2\u6237\u7aef\u8fde\u7eed\u53d1\u900110\u4e2a\u6570\u5b57\u7ed9\u670d\u52a1\u5668，\u4ee5\u68c0\u9a8cUDP\u7684\u4f20\u8f93\u6548\u7387\u548c\u51c6\u786e\u6027\u3002\u5b9e\u9a8c\u5c06\u5c55\u793aUDP\u5957\u63a5\u5b57\u7f16\u7a0b\u7684\u5b9e\u9645\u5e94\u7528，\u6db5\u76d6\u521b\u5efa\u5957\u63a5\u5b57\u3001\u6570\u636e\u53d1\u9001\u3001\u63a5\u6536\u4ee5\u53ca\u5982\u4f55\u5904\u7406UDP\u7684\u4e0d\u53ef\u9760\u6027\u7b49\u95ee\u9898\u3002 <\/p>\n
\u672c\u6587\u8fd8\u6709\u914d\u5957\u7684\u7cbe\u54c1\u8d44\u6e90，\u70b9\u51fb\u83b7\u53d6 <\/p><\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb870\u6b21\uff0c\u70b9\u8d5e25\u6b21\uff0c\u6536\u85cf8\u6b21\u3002\u7528\u6237\u6570\u636e\u62a5\u534f\u8bae\uff08UDP, User Datagram Protocol\uff09\u662f\u4e92\u8054\u7f51\u534f\u8bae\u5957\u4ef6\u4e2d\u4e00\u79cd\u65e0\u8fde\u63a5\u7684\u4f20\u8f93\u5c42\u534f\u8bae\u3002UDP\u63d0\u4f9b\u4e86\u4e00\u79cd\u5feb\u901f\u3001\u65e0\u5e8f\u548c\u4e0d\u53ef\u9760\u7684\u6d88\u606f\u4f20\u8f93\u670d\u52a1\uff0c\u4e3b\u8981\u7528\u4e8e\u9700\u8981\u901f\u5ea6\u4f46\u53ef\u4ee5\u5bb9\u5fcd\u4e22\u5305\u548c\u987a\u5e8f\u9519\u8bef\u7684\u5e94\u7528\u573a\u666f\u3002<\/p>\n","protected":false},"author":2,"featured_media":34141,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"topic":[],"class_list":["post-34143","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server"],"yoast_head":"\n