{"id":85913,"date":"2026-07-28T00:08:31","date_gmt":"2026-07-27T16:08:31","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/85913.html"},"modified":"2026-07-28T00:08:31","modified_gmt":"2026-07-27T16:08:31","slug":"linux-tcp%e5%a4%9a%e8%bf%9b%e7%a8%8b%e5%b9%b6%e5%8f%91%e6%9c%8d%e5%8a%a1%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/85913.html","title":{"rendered":"linux\u2014\u2014TCP\u591a\u8fdb\u7a0b\u5e76\u53d1\u670d\u52a1\u5668"},"content":{"rendered":"

\u591a\u7ebf\u7a0b：\u6765\u4e00\u4e2a\u5ba2\u6237，\u5f00\u4e00\u4e2a\u7ebf\u7a0b<\/p>\n

\u591a\u8fdb\u7a0b：\u6765\u4e00\u4e2a\u5ba2\u6237，\u5f00\u4e00\u4e2a\u5b50\u8fdb\u7a0b<\/p>\n

\u670d\u52a1\u5668\u7aef<\/p>\n

#include<stdio.h>
\n#include <sys\/types.h> \/* See NOTES *\/
\n#include <sys\/socket.h>
\n#include <unistd.h>
\n#include<stdlib.h>
\n#include <strings.h>
\n#include <arpa\/inet.h>
\n#include<string.h>
\n#include <pthread.h>
\n#include<signal.h>
\n#include <sys\/wait.h><\/p>\n

#define QUIT_STR "QUIT"
\n#define BUFSIZE 1024
\n#define BACKLOG 5
\n#define SERV_IP 5001
\n#define SERV_IP_ADDR "192.168.88.129"<\/p>\n

void child_data_handle(int signum)
\n{
\nif(SIGCHLD == signum)
\n{
\nwaitpid(-1,NULL,WNOHANG);
\n}
\n}
\nvoid* client_data_handle(void* arg);
\nint main()
\n{
\nint fd = -1;
\nsignal(SIGCHLD,child_data_handle);
\nstruct sockaddr_in sin;
\n\/\/1.socket
\nfd = socket(AF_INET,SOCK_STREAM,0);
\nif(fd<0)
\n{
\nperror("socket");
\nexit(1);
\n}<\/p>\n

bzero(&sin,sizeof(sin));<\/p>\n

sin.sin_family = AF_INET;
\nsin.sin_port = htons(SERV_IP);
\n\/\/sin.sin_addr.s_addr = inet_addr(SERV_IP_ADDR);
\nsin.sin_addr.s_addr = INADDR_ANY;
\n\/*if(inet_pion(AF_INET,SERV_IP_ADDR,(void *)sin.sin_addr.s_addr) != 1)
\n {
\n perror("inet_pton");
\n exit(1);
\n }
\n *\/
\n\/\/2.bind
\nif(bind(fd,(struct sockaddr *)&sin,sizeof(sin)) <0)
\n{
\nperror("bind");
\nexit(0);
\n}
\n\/\/3.listen
\nif(listen(fd,BACKLOG) < 0)
\n{
\nperror("listen");
\nexit(1);
\n}<\/p>\n

\/\/4.accept
\npid_t pid;
\nint newfd = -1;
\nstruct sockaddr_in cin;
\nsocklen_t addrlen = sizeof(cin);
\nwhile(1)
\n{
\nnewfd = accept(fd,(struct sockaddr *)&cin,&addrlen);
\nif(newfd < 0)
\n{
\nperror("accept");
\nbreak;
\n}
\npid = fork();
\nif(pid < 0)
\n{
\nperror("fork");
\nbreak;
\n}
\nif(pid == 0)
\n{
\nchar ipv4_addr[16];
\nif(!inet_ntop(AF_INET,(void *)&cin.sin_addr,ipv4_addr,sizeof(cin)))
\n{
\nperror("inet_ntop");
\nexit(1);
\n}
\nprintf("Client:(%s,%d) is connect\\\\n",ipv4_addr,ntohs(cin.sin_port));<\/p>\n

client_data_handle(&newfd);
\nclose(fd);
\n}
\nif(pid > 0)
\n{
\nclose(newfd);
\n}<\/p>\n

}
\nclose(fd);<\/p>\n

return 0;
\n}<\/p>\n

void* client_data_handle(void* arg)
\n{
\nint newfd = *(int *)arg;<\/p>\n

char buf[BUFSIZE];
\nint ret = -1;
\nprintf("client handle process:newfd = %d\\\\n",newfd);<\/p>\n

while(1)
\n{
\ndo
\n{
\nbzero(buf,BUFSIZE);
\nret = read(newfd,buf,BUFSIZE-1);
\n}while(ret < 1);
\nif(ret < 0)
\n{
\nexit(1);
\n}
\nif(!ret)
\n{
\nbreak;
\n}
\nprintf("receive data:%s\\\\n",buf);<\/p>\n

if(!strncasecmp(buf,QUIT_STR,strlen(QUIT_STR)))
\n{
\nprintf("Client is exiting!\\\\n");
\nbreak;
\n}
\n}<\/p>\n

close(newfd);
\nreturn NULL;
\n}<\/p>\n

\u5176\u5b9e\u4e0e\u591a\u7ebf\u7a0b\u7684\u53d8\u5316\u5c31\u5728\u6700\u540eaccept\u90a3\u90e8\u5206\u7684\u5185\u5bb9\u91cc<\/p>\n

\u7236\u8fdb\u7a0b = \u53ea\u8d1f\u8d23\u7b49\u5ba2\u6237\u7aef（accept）<\/p>\n

\u5b50\u8fdb\u7a0b = \u53ea\u8d1f\u8d23\u670d\u52a1\u5ba2\u6237\u7aef（read\/write）<\/p>\n

fork () \u4e00\u5288\u4e3a\u4e8c，\u7236\u5b50\u5404\u5e72\u5404\u7684！<\/p>\n

\u2460\u53d8\u91cf\u5b9a\u4e49<\/p>\n

pid_t pid; \/\/ \u8fdb\u7a0b\u53f7，\u7528\u6765\u5224\u65ad\u7236\u5b50
\nint newfd = -1; \/\/ \u5ba2\u6237\u7aef\u8fde\u63a5\u7684\u5957\u63a5\u5b57
\nstruct sockaddr_in cin;\/\/ \u7528\u6765\u5b58\u5ba2\u6237\u7aefIP\u3001\u7aef\u53e3
\nsocklen_t addrlen = sizeof(cin);<\/p>\n

\u2461\u6b7b\u5faa\u73af：\u7236\u8fdb\u7a0b\u6c38\u8fdc\u7b49\u5ba2\u6237\u7aef<\/p>\n

while(1) {
\n \/\/ \u7236\u8fdb\u7a0b\u963b\u585e\u5728\u8fd9\u91cc，\u76f4\u5230\u5ba2\u6237\u7aef\u6765\u8fde\u63a5
\n newfd = accept(fd, (struct sockaddr *)&cin, &addrlen);<\/p>\n

\u2462\u5ba2\u6237\u7aef\u6765\u4e86 \u2192 \u521b\u5efa\u5b50\u8fdb\u7a0b<\/p>\n

pid = fork(); \/\/ 🔥 \u8fdb\u7a0b\u5206\u88c2：\u4e00\u7236\u4e00\u5b50<\/p>\n

fork () \u4f5c\u7528：<\/p>\n

\u628a\u5f53\u524d\u8fdb\u7a0b\u590d\u5236\u4e00\u4efd，\u4e00\u6a21\u4e00\u6837\u3002\u8c03\u7528\u4e00\u6b21，\u8fd4\u56de\u4e24\u4e2a\u503c：<\/p>\n