{"id":28370,"date":"2025-04-20T00:06:18","date_gmt":"2025-04-19T16:06:18","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/28370.html"},"modified":"2025-04-20T00:06:18","modified_gmt":"2025-04-19T16:06:18","slug":"tcp%e5%b9%b6%e5%8f%91%e6%9c%8d%e5%8a%a1%e5%99%a8%ef%bc%8c%e5%a4%9a%e8%bf%9b%e7%a8%8b%e3%80%81%e5%a4%9a%e7%ba%bf%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/28370.html","title":{"rendered":"tcp\u5e76\u53d1\u670d\u52a1\u5668\uff0c\u591a\u8fdb\u7a0b\u3001\u591a\u7ebf\u7a0b"},"content":{"rendered":"

1.\u8fdb\u7a0b<\/p>\n

#include <stdio.h> #include <sys\/types.h> #include <sys\/socket.h> #include <arpa\/inet.h> #include <netinet\/in.h> #include <string.h> #include <unistd.h> #include <stdlib.h> #include <signal.h><\/p>\n

#define SER_PORT 6666 #define SER_IP \u00a0"192.168.124.33" \u00a0 \/\/"0.0.0.0"<\/p>\n

int deal_cli_msg(int newfd,struct sockaddr_in cin); void signal_handle(int signum);<\/p>\n

int main(int argc, const char *argv[]) { \u00a0 \u00a0 \/\/\u521b\u5efa\u6d41\u5f0f\u5957\u63a5\u5b57 \u00a0 \u00a0 int sfd = socket(AF_INET, SOCK_STREAM, 0); \u00a0 \u00a0 if(sfd < 0) \u00a0 \u00a0 { \u00a0 \u00a0 \u00a0 \u00a0 fprintf(stderr, "__%d__ ", __LINE__); \u00a0 \u00a0 \u00a0 \u00a0 perror("socket"); \u00a0 \u00a0 \u00a0 \u00a0 return -1; \u00a0 \u00a0 } \u00a0 \u00a0 printf("socket success __%d__\\\\n", __LINE__);<\/p>\n

\u00a0 \u00a0 \/\/\u5141\u8bb8\u7aef\u53e3\u5feb\u901f\u91cd\u7528 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 int reuse = 1; \u00a0 \u00a0 if(setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) < 0) \u00a0 \u00a0 { \u00a0 \u00a0 \u00a0 \u00a0 fprintf(stderr, "__%d__ ", __LINE__); \u00a0 \u00a0 \u00a0 \u00a0 perror("setsockopt"); \u00a0 \u00a0 \u00a0 \u00a0 return -1; \u00a0 \u00a0 } \u00a0 \u00a0 printf("reuseaddr success __%d__\\\\n", __LINE__);<\/p>\n

\u00a0 \u00a0 \/\/\u82e5\u4ece\u547d\u4ee4\u884c\u4f20\u5165\u7aef\u53e3\u53f7，\u5219\u4f7f\u7528\u4f20\u5165\u7684\u7aef\u53e3\u53f7，\u6ca1\u6709\u4f20\u5165\u5219\u4f7f\u7528\u5b8f\u5b9a\u4e49\u7684\u7aef\u53e3\u53f7 \u00a0 \u00a0 int port = \u00a0argc>=2?atoi(argv[1]):SER_PORT;<\/p>\n

\u00a0 \u00a0 \/\/\u586b\u5145\u670d\u52a1\u5668\u7684\u5730\u5740\u4fe1\u606f\u7ed3\u6784\u4f53，\u7ed9bind\u51fd\u6570\u4f7f\u7528 \u00a0 \u00a0 \/\/\u771f\u5b9e\u7684\u5730\u5740\u4fe1\u606f\u7ed3\u6784\u4f53\u6839\u636e\u5730\u5740\u65cf\u6307\u5b9a AF_INET: man 7 ip \u00a0 \u00a0 struct sockaddr_in sin; \u00a0 \u00a0 sin.sin_family \u00a0 \u00a0 \u00a0= AF_INET; \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/\u5fc5\u987b\u586bAF_INET \u00a0 \u00a0 sin.sin_port \u00a0 \u00a0 \u00a0 \u00a0= htons(port); \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/\u7aef\u53e3\u53f7\u7684\u7f51\u7edc\u5b57\u8282\u5e8f，1024～49151 \u00a0 \u00a0 sin.sin_addr.s_addr = inet_addr(SER_IP); \u00a0 \u00a0\/\/\u672c\u673aIP\u7684\u7f51\u7edc\u5b57\u8282\u5e8f，ifconfig\u67e5\u770b\u672c\u673aIP \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/127.0.0.1：\u672c\u5730\u6362\u56deIP，\u53ea\u80fd\u505a\u672c\u673a\u901a\u4fe1\u7684IP \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/0.0.0.0 : \u4ee3\u8868\u8fd0\u884c\u73af\u5883\u4e2d\u6240\u6709\u53ef\u7528IP<\/p>\n

\u00a0 \u00a0 \/\/\u7ed1\u5b9a\u670d\u52a1\u5668\u81ea\u8eab\u7684\u5730\u5740\u4fe1\u606f \u00a0 \u00a0 if(bind(sfd, (struct sockaddr*)&sin, sizeof(sin)) < 0) \u00a0 \u00a0 { \u00a0 \u00a0 \u00a0 \u00a0 fprintf(stderr, "__%d__ ", __LINE__); \u00a0 \u00a0 \u00a0 \u00a0 perror("bind"); \u00a0 \u00a0 \u00a0 \u00a0 return -1; \u00a0 \u00a0 } \u00a0 \u00a0 printf("bind success __%d__\\\\n", __LINE__);<\/p>\n

\u00a0 \u00a0 \/\/\u5c06\u5957\u63a5\u5b57\u8bbe\u7f6e\u4e3a\u88ab\u52a8\u76d1\u542c\u72b6\u6001 \u00a0 \u00a0 if(listen(sfd, 128) < 0) \u00a0 \u00a0 { \u00a0 \u00a0 \u00a0 \u00a0 fprintf(stderr, "__%d__ ", __LINE__); \u00a0 \u00a0 \u00a0 \u00a0 perror("listen"); \u00a0 \u00a0 \u00a0 \u00a0 return -1; \u00a0 \u00a0 } \u00a0 \u00a0 printf("listen success __%d__\\\\n", __LINE__);<\/p>\n

\u00a0 \u00a0 \/\/\u963b\u585e\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5\u6210\u529f，\u4ece\u5df2\u5b8c\u6210\u8fde\u63a5\u7684\u961f\u5217\u5934\u4e2d\u83b7\u53d6\u4e00\u4e2a\u5ba2\u6237\u7aef\u4fe1\u606f， \u00a0 \u00a0 \/\/\u751f\u6210\u4e00\u4e2a\u65b0\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26，\u8fd9\u4e2a\u65b0\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u624d\u662f\u4e0e\u5ba2\u6237\u7aef\u901a\u4fe1\u7528\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26 \u00a0 \u00a0 struct sockaddr_in cin; \u00a0 \u00a0 \/\/\u5b58\u50a8\u83b7\u53d6\u5230\u7684\u5ba2\u6237\u7aef\u7684\u5730\u5740\u4fe1\u606f \u00a0 \u00a0 socklen_t addrlen = sizeof(cin);<\/p>\n

\u00a0\u00a0 \u00a0int newfd=-1; \u00a0\u00a0 \u00a0pid_t pid=0; \u00a0\u00a0 \u00a0signal(SIGCHLD, signal_handle); \u00a0\u00a0 \u00a0while(1) \u00a0\u00a0 \u00a0{ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0newfd = accept(sfd, (struct sockaddr*)&cin, &addrlen); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if(newfd < 0) \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0fprintf(stderr, "__%d__ ", __LINE__); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0perror("accpet"); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return -1; \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0} \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("client connect success, [%s:%d] newfd = %d __%d__\\\\n", \\\\ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0inet_ntoa(cin.sin_addr), ntohs(cin.sin_port), newfd, __LINE__);<\/p>\n

\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0pid=fork(); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if(pid==0) \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0close(sfd); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0deal_cli_msg(newfd,cin); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0close(newfd); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0exit(0); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0} \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0close(newfd); \u00a0\u00a0 \u00a0} \u00a0 \u00a0 \/\/\u5173\u95ed \u00a0 \u00a0 close(sfd);<\/p>\n

\u00a0 \u00a0 return 0; }<\/p>\n

int deal_cli_msg(int newfd,struct sockaddr_in cin) { \u00a0\u00a0 \u00a0char buf[128] = ""; \u00a0\u00a0 \u00a0ssize_t res = 0; \u00a0\u00a0 \u00a0while(1) \u00a0\u00a0 \u00a0{ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0bzero(buf, sizeof(buf)); \u00a0 \u00a0\/\/memset(buf, 0, sizeof(buf)); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u6536 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0res = recv(newfd, buf, sizeof(buf), 0); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if(res < 0) \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0fprintf(stderr, "__%d__ ", __LINE__); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0perror("recv"); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return -1; \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0} \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0else if(0 == res) \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("client [%s:%d] offline \u00a0__%d__\\\\n",\\\\ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0inet_ntoa(cin.sin_addr), ntohs(cin.sin_port), __LINE__); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break; \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("[%s:%d] newfd=%d : %s\\\\n", inet_ntoa(cin.sin_addr), ntohs(cin.sin_port), newfd, buf);<\/p>\n

\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u53d1 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0strcat(buf, ">_<"); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if(send(newfd, buf, sizeof(buf), 0) < 0) \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0fprintf(stderr, "__%d__ ", __LINE__); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0perror("send"); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return -1; \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0} \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("send success __%d__\\\\n", __LINE__); \u00a0\u00a0 \u00a0} }<\/p>\n

void signal_handle(int signum) { \u00a0\u00a0 \u00a0int status; \u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0if(signum == SIGCHLD){ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int ret = wait( &status); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if(ret < 0 ){ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0perror("wait error"); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return ; \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0} \u00a0\u00a0 \u00a0} \u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0printf("fataher found subprocess exit %d\\\\n", \u00a0(signed char) ((status >>8)&0xFF ) \u00a0); }<\/p>\n

1.\u7ebf\u7a0b<\/p>\n

#include <stdio.h> #include <sys\/types.h> #include <sys\/socket.h> #include <arpa\/inet.h> #include <netinet\/in.h> #include <string.h> #include <unistd.h> #include <stdlib.h> #include <pthread.h><\/p>\n

#define SER_PORT 6666 #define SER_IP \u00a0"192.168.124.33" \u00a0 \/\/"0.0.0.0"<\/p>\n

struct thread_data { \u00a0\u00a0 \u00a0pthread_t tid; \u00a0\u00a0 \u00a0int newfd; \u00a0\u00a0 \u00a0struct sockaddr_in cin; }; void* thead_handle_fun(void* arg);<\/p>\n

int main(int argc, const char *argv[]) { \u00a0 \u00a0 \/\/\u521b\u5efa\u6d41\u5f0f\u5957\u63a5\u5b57 \u00a0 \u00a0 int sfd = socket(AF_INET, SOCK_STREAM, 0); \u00a0 \u00a0 if(sfd < 0) \u00a0 \u00a0 { \u00a0 \u00a0 \u00a0 \u00a0 fprintf(stderr, "__%d__ ", __LINE__); \u00a0 \u00a0 \u00a0 \u00a0 perror("socket"); \u00a0 \u00a0 \u00a0 \u00a0 return -1; \u00a0 \u00a0 } \u00a0 \u00a0 printf("socket success __%d__\\\\n", __LINE__);<\/p>\n

\u00a0 \u00a0 \/\/\u5141\u8bb8\u7aef\u53e3\u5feb\u901f\u91cd\u7528 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 int reuse = 1; \u00a0 \u00a0 if(setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) < 0) \u00a0 \u00a0 { \u00a0 \u00a0 \u00a0 \u00a0 fprintf(stderr, "__%d__ ", __LINE__); \u00a0 \u00a0 \u00a0 \u00a0 perror("setsockopt"); \u00a0 \u00a0 \u00a0 \u00a0 return -1; \u00a0 \u00a0 } \u00a0 \u00a0 printf("reuseaddr success __%d__\\\\n", __LINE__);<\/p>\n

\u00a0 \u00a0 \/\/\u82e5\u4ece\u547d\u4ee4\u884c\u4f20\u5165\u7aef\u53e3\u53f7，\u5219\u4f7f\u7528\u4f20\u5165\u7684\u7aef\u53e3\u53f7，\u6ca1\u6709\u4f20\u5165\u5219\u4f7f\u7528\u5b8f\u5b9a\u4e49\u7684\u7aef\u53e3\u53f7 \u00a0 \u00a0 int port = \u00a0argc>=2?atoi(argv[1]):SER_PORT;<\/p>\n

\u00a0 \u00a0 \/\/\u586b\u5145\u670d\u52a1\u5668\u7684\u5730\u5740\u4fe1\u606f\u7ed3\u6784\u4f53，\u7ed9bind\u51fd\u6570\u4f7f\u7528 \u00a0 \u00a0 \/\/\u771f\u5b9e\u7684\u5730\u5740\u4fe1\u606f\u7ed3\u6784\u4f53\u6839\u636e\u5730\u5740\u65cf\u6307\u5b9a AF_INET: man 7 ip \u00a0 \u00a0 struct sockaddr_in sin; \u00a0 \u00a0 sin.sin_family \u00a0 \u00a0 \u00a0= AF_INET; \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/\u5fc5\u987b\u586bAF_INET \u00a0 \u00a0 sin.sin_port \u00a0 \u00a0 \u00a0 \u00a0= htons(port); \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/\u7aef\u53e3\u53f7\u7684\u7f51\u7edc\u5b57\u8282\u5e8f，1024～49151 \u00a0 \u00a0 sin.sin_addr.s_addr = inet_addr(SER_IP); \u00a0 \u00a0\/\/\u672c\u673aIP\u7684\u7f51\u7edc\u5b57\u8282\u5e8f，ifconfig\u67e5\u770b\u672c\u673aIP \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/127.0.0.1：\u672c\u5730\u6362\u56deIP，\u53ea\u80fd\u505a\u672c\u673a\u901a\u4fe1\u7684IP \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/0.0.0.0 : \u4ee3\u8868\u8fd0\u884c\u73af\u5883\u4e2d\u6240\u6709\u53ef\u7528IP<\/p>\n

\u00a0 \u00a0 \/\/\u7ed1\u5b9a\u670d\u52a1\u5668\u81ea\u8eab\u7684\u5730\u5740\u4fe1\u606f \u00a0 \u00a0 if(bind(sfd, (struct sockaddr*)&sin, sizeof(sin)) < 0) \u00a0 \u00a0 { \u00a0 \u00a0 \u00a0 \u00a0 fprintf(stderr, "__%d__ ", __LINE__); \u00a0 \u00a0 \u00a0 \u00a0 perror("bind"); \u00a0 \u00a0 \u00a0 \u00a0 return -1; \u00a0 \u00a0 } \u00a0 \u00a0 printf("bind success __%d__\\\\n", __LINE__);<\/p>\n

\u00a0 \u00a0 \/\/\u5c06\u5957\u63a5\u5b57\u8bbe\u7f6e\u4e3a\u88ab\u52a8\u76d1\u542c\u72b6\u6001 \u00a0 \u00a0 if(listen(sfd, 128) < 0) \u00a0 \u00a0 { \u00a0 \u00a0 \u00a0 \u00a0 fprintf(stderr, "__%d__ ", __LINE__); \u00a0 \u00a0 \u00a0 \u00a0 perror("listen"); \u00a0 \u00a0 \u00a0 \u00a0 return -1; \u00a0 \u00a0 } \u00a0 \u00a0 printf("listen success __%d__\\\\n", __LINE__);<\/p>\n

\u00a0 \u00a0 \/\/\u963b\u585e\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5\u6210\u529f，\u4ece\u5df2\u5b8c\u6210\u8fde\u63a5\u7684\u961f\u5217\u5934\u4e2d\u83b7\u53d6\u4e00\u4e2a\u5ba2\u6237\u7aef\u4fe1\u606f， \u00a0 \u00a0 \/\/\u751f\u6210\u4e00\u4e2a\u65b0\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26，\u8fd9\u4e2a\u65b0\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u624d\u662f\u4e0e\u5ba2\u6237\u7aef\u901a\u4fe1\u7528\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26 \u00a0 \u00a0 struct sockaddr_in cin; \u00a0 \u00a0 \/\/\u5b58\u50a8\u83b7\u53d6\u5230\u7684\u5ba2\u6237\u7aef\u7684\u5730\u5740\u4fe1\u606f \u00a0 \u00a0 socklen_t addrlen = sizeof(cin);<\/p>\n

\u00a0 \u00a0 struct thread_data* pdata=malloc(sizeof(*pdata)); \u00a0\u00a0 \u00a0memset(pdata,0,sizeof(*pdata)); \u00a0\u00a0 \u00a0while(1) \u00a0\u00a0 \u00a0{ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int newfd = accept(sfd, (struct sockaddr*)&cin, &addrlen); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if(newfd < 0) \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0fprintf(stderr, "__%d__ ", __LINE__); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0perror("accpet"); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return -1; \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0} \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("client connect success, [%s:%d] newfd = %d __%d__\\\\n", \\\\ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0inet_ntoa(cin.sin_addr), ntohs(cin.sin_port), newfd, __LINE__); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0pdata->newfd=newfd; \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0pdata->cin=cin; \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int ret = pthread_create(&pdata->tid, NULL, thead_handle_fun \u00a0,pdata ); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if(ret <0){ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0perror("create thread err"); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return -34; \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0} \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0pthread_detach( pdata->tid);<\/p>\n

\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0} \u00a0 \u00a0 close(sfd);<\/p>\n

\u00a0 \u00a0 return 0; }<\/p>\n

void* thead_handle_fun(void* arg) { \u00a0\u00a0 \u00a0struct thread_data *p = arg; \u00a0\u00a0 \u00a0int newfd=p->newfd; \u00a0\u00a0 \u00a0struct sockaddr_in cin=p->cin; \u00a0\u00a0 \u00a0char buf[128] = ""; \u00a0\u00a0 \u00a0ssize_t res = 0; \u00a0\u00a0 \u00a0while(1) \u00a0\u00a0 \u00a0{ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0bzero(buf, sizeof(buf)); \u00a0 \u00a0\/\/memset(buf, 0, sizeof(buf)); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u6536 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0res = recv(newfd, buf, sizeof(buf), 0); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if(res < 0) \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0fprintf(stderr, "__%d__ ", __LINE__); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0perror("recv"); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return -1; \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0} \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0else if(0 == res) \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("client [%s:%d] offline \u00a0__%d__\\\\n",\\\\ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0inet_ntoa(cin.sin_addr), ntohs(cin.sin_port), __LINE__); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0break; \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}<\/p>\n

\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("[%s:%d] newfd=%d : %s\\\\n", inet_ntoa(cin.sin_addr), ntohs(cin.sin_port), newfd, buf);<\/p>\n

\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/\/\u53d1 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0strcat(buf, ">_<"); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if(send(newfd, buf, sizeof(buf), 0) < 0) \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{ \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0fprintf(stderr, "__%d__ ", __LINE__); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0perror("send"); \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return -1; \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0} \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0printf("send success __%d__\\\\n", __LINE__); \u00a0\u00a0 \u00a0} \u00a0\u00a0 \u00a0close(newfd); }<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb937\u6b21\uff0c\u70b9\u8d5e20\u6b21\uff0c\u6536\u85cf24\u6b21\u3002\/\u5b58\u50a8\u83b7\u53d6\u5230\u7684\u5ba2\u6237\u7aef\u7684\u5730\u5740\u4fe1\u606f\u3002\/\/\u751f\u6210\u4e00\u4e2a\u65b0\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0c\u8fd9\u4e2a\u65b0\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u624d\u662f\u4e0e\u5ba2\u6237\u7aef\u901a\u4fe1\u7528\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002\/\/\u751f\u6210\u4e00\u4e2a\u65b0\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0c\u8fd9\u4e2a\u65b0\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u624d\u662f\u4e0e\u5ba2\u6237\u7aef\u901a\u4fe1\u7528\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002\/\/\u82e5\u4ece\u547d\u4ee4\u884c\u4f20\u5165\u7aef\u53e3\u53f7\uff0c\u5219\u4f7f\u7528\u4f20\u5165\u7684\u7aef\u53e3\u53f7\uff0c\u6ca1\u6709\u4f20\u5165\u5219\u4f7f\u7528\u5b8f\u5b9a\u4e49\u7684\u7aef\u53e3\u53f7\u3002\/\/\u82e5\u4ece\u547d\u4ee4\u884c\u4f20\u5165\u7aef\u53e3\u53f7\uff0c\u5219\u4f7f\u7528\u4f20\u5165\u7684\u7aef\u53e3\u53f7\uff0c\u6ca1\u6709\u4f20\u5165\u5219\u4f7f\u7528\u5b8f\u5b9a\u4e49\u7684\u7aef\u53e3\u53f7\u3002<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[230,205,43],"topic":[],"class_list":["post-28370","post","type-post","status-publish","format-standard","hentry","category-server","tag-php","tag-tcp-ip","tag-43"],"yoast_head":"\ntcp\u5e76\u53d1\u670d\u52a1\u5668\uff0c\u591a\u8fdb\u7a0b\u3001\u591a\u7ebf\u7a0b - 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