listenfd：\u4e13\u95e8\u8d1f\u8d23\u63a5\u6536\u65b0\u8fde\u63a5<\/p>\n<\/li>\n
sockfd：\u4e13\u95e8\u8d1f\u8d23\u548c\u5ba2\u6237\u7aef\u901a\u4fe1<\/p>\n<\/li>\n<\/ul>\n
\u5355\u8fdb\u7a0b\u7248\u672c<\/h2>\nTCP\u670d\u52a1\u7aef<\/h3>\n
class Server
\n{
\npublic:
\n Server(uint16_t server_port, std::string server_ip)
\n : server_port_(server_port), server_ip_(server_ip)
\n {
\n }<\/p>\n
void init()
\n {
\n listenfd_ = socket(AF_INET, SOCK_STREAM, 0);
\n if (listenfd_ < 0)
\n {
\n printf("listenfd_ create error!!!\\\\n");
\n exit(1);
\n }
\n printf("listenfd_ create successful!!!, listenfd_:%d\\\\n", listenfd_);<\/p>\n
struct sockaddr_in server;
\n memset(&server, 0, sizeof server);
\n server.sin_family = AF_INET;
\n server.sin_port = htons(server_port_);
\n inet_pton(AF_INET, server_ip_.c_str(), &(server.sin_addr));<\/p>\n
if (bind(listenfd_, (struct sockaddr *)&server, sizeof(server)) < 0)
\n {
\n printf("bind fail !!!\\\\n");
\n exit(2);
\n }
\n printf("bind successful!!!\\\\n");<\/p>\n
if (listen(listenfd_, 10) < 0)
\n {
\n printf("listen fail!!!\\\\n");
\n exit(3);
\n }
\n printf("listen successful!!!\\\\n");
\n }<\/p>\n
void service(int sockfd, std::string client_ip, uint16_t client_port)
\n {
\n while (1)
\n {
\n char buffer[1024];
\n ssize_t s = read(sockfd, buffer, sizeof(buffer) – 1);
\n if (s > 0)
\n {
\n buffer[s] = 0;
\n printf("client say:%s\\\\n", buffer);
\n std::string info = "server say:";
\n info += buffer;
\n write(sockfd, info.c_str(), info.size());
\n }
\n else if (s == 0)
\n {
\n printf("client quit !!!\\\\n");
\n break;
\n }
\n else
\n {
\n printf("read error !!!\\\\n");
\n break;
\n }
\n }
\n }<\/p>\n
void start()
\n {
\n while (1)
\n {
\n struct sockaddr_in client;
\n socklen_t len = sizeof(client);
\n int sockfd = accept(listenfd_, (struct sockaddr *)&client, &len);
\n if (sockfd < 0)
\n {
\n printf("accept fail!!!\\\\n");
\n }
\n printf("get a new link !!!, sockfd : %d\\\\n", sockfd);<\/p>\n
uint16_t client_port = ntohs(client.sin_port);
\n char client_ip[16];
\n inet_ntop(AF_INET, &(client.sin_addr), client_ip, sizeof client_ip);<\/p>\n
service(sockfd, client_ip, client_port);
\n close(sockfd);
\n }
\n }<\/p>\n
~Server()
\n {
\n close(listenfd_);
\n }<\/p>\n
private:
\n int listenfd_;
\n uint16_t server_port_;
\n std::string server_ip_;
\n};<\/p>\n
int main()
\n{
\n Server srv = Server(8080, "0.0.0.0");
\n srv.init();
\n srv.start();
\n return 0;
\n}<\/p>\n
TCP\u5ba2\u6237\u7aef<\/h3>\n
int main(int argc, char *argv[])
\n{
\n if (argc != 3)
\n {
\n printf("\\\\n\\\\t Usage: %s serverip serverport!\\\\n");
\n exit(1);
\n }<\/p>\n
uint16_t server_port = atoi(argv[2]);
\n std::string server_ip = argv[1];
\n int sockfd = socket(AF_INET, SOCK_STREAM, 0);
\n if (sockfd < 0)
\n {
\n printf("sockfd fail !!!\\\\n");
\n exit(2);
\n }
\n printf("sock successful !!!, sockfd : %d\\\\n", sockfd);<\/p>\n
struct sockaddr_in server;
\n memset(&server, 0, sizeof server);
\n server.sin_family = AF_INET;
\n server.sin_port = htons(server_port);
\n inet_pton(AF_INET, server_ip.c_str(), &server.sin_addr);
\n if (connect(sockfd, (struct sockaddr *)&server, sizeof server) < 0)
\n {
\n printf("connect fail!!!\\\\n");
\n }
\n while (1)
\n {
\n std::string message;
\n std::getline(std::cin, message);
\n write(sockfd, message.c_str(), message.size());<\/p>\n
char buffer[1024];
\n ssize_t s = read(sockfd, buffer, sizeof(buffer) – 1);
\n if (s > 0)
\n {
\n buffer[s] = 0;
\n printf("%s\\\\n", buffer);
\n }
\n else if (s == 0)
\n {
\n printf("server close\\\\n");
\n break;
\n }
\n }
\n close(sockfd);
\n return 0;
\n}<\/p>\n
\u8fd9\u6837\u4e00\u4e2a\u7b80\u5355\u7684\u5355\u8fdb\u7a0b\u7248\u672c\u7684\u57fa\u4e8eTCP\u7684socket\u7f51\u7edc\u7f16\u7a0b\u5c31\u6210\u529f\u5b9e\u73b0\u4e86\u3002\u4f46\u662f\u73b0\u5728\u6709\u5982\u4e0b\u7684\u95ee\u9898：<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260212234322-698e659acf789.png\")
<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260212234323-698e659b65058.png\")
<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260212234323-698e659bda57f.png\")
<\/p>\n
\u7531\u4e8e\u6211\u4eec\u7684\u670d\u52a1\u5668\u73b0\u5728\u662f\u5355\u8fdb\u7a0b\u7684，\u6240\u4ee5\u5f53\u4e00\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u5230\u670d\u52a1\u5668\u4e4b\u540e，\u4f1a\u8c03\u7528service\u8fdb\u884c\u670d\u52a1，\u800c\u6211\u4eec\u7684service\u662f\u5faa\u73af\u6267\u884c，\u53ea\u6709\u5f53\u5ba2\u6237\u7aef\u9000\u51fa\u7684\u65f6\u5019，service\u624d\u80fd\u9000\u51fa，\u8fd9\u5c31\u5bfc\u81f4\u6211\u4eec\u65e0\u6cd5\u7ee7\u7eed\u76d1\u542c，\u6240\u4ee5\u4ece\u4e0a\u56fe\u6765\u770b\u5230，\u4e00\u4e2a\u5ba2\u6237\u7aef\u8bbf\u95ee\u7684\u65f6\u5019，\u53e6\u4e00\u4e2a\u5ba2\u6237\u7aef\u8bbf\u95ee\u7684\u65f6\u5019\u662f\u6ca1\u6709\u53cd\u5e94\u7684，\u53ea\u6709\u5f53\u4e00\u4e2a\u5ba2\u6237\u7aef\u9000\u51fa\u4e4b\u540e，\u8fd9\u4e2a\u5ba2\u6237\u7aef\u624d\u5f97\u4ee5\u8bbf\u95ee，\u4f5c\u4e3a\u4e00\u4e2a\u670d\u52a1\u5668，\u8fd9\u6837\u7684\u95ee\u9898\u662f\u4e0d\u53ef\u4ee5\u5b58\u5728\u7684，\u6240\u4ee5\u73b0\u5728\u6211\u4eec\u6539\u4e3a\u5bf9\u8fdb\u7a0b\u7248\u672c\u7684TCP\u670d\u52a1\u7aef，\u5fc5\u987b\u4fdd\u8bc1\u4e00\u4e2a\u5ba2\u6237\u7aef\u8bbf\u95ee\u7684\u540c\u65f6，\u53e6\u4e00\u4e2a\u5ba2\u6237\u7aef\u4e5f\u53ef\u4ee5\u8fdb\u884c\u8bbf\u95ee\u3002<\/p>\n
\u591a\u8fdb\u7a0b\u7248\u672c TCP \u670d\u52a1\u5668<\/h2>\n\u53cc fork<\/h3>\n
class Server
\n{
\npublic:
\n Server(uint16_t server_port, std::string server_ip)
\n : server_port_(server_port), server_ip_(server_ip)
\n {
\n }<\/p>\n
void init()
\n {<\/p>\n
listenfd_ = socket(AF_INET, SOCK_STREAM, 0);
\n if (listenfd_ < 0)
\n {
\n printf("listenfd_ create error!!!\\\\n");
\n exit(1);
\n }
\n printf("listenfd_ create successful!!!, listenfd_:%d\\\\n", listenfd_);
\n struct sockaddr_in server;
\n memset(&server, 0, sizeof server);
\n server.sin_family = AF_INET;
\n server.sin_port = htons(server_port_);
\n inet_pton(AF_INET, server_ip_.c_str(), &(server.sin_addr));<\/p>\n
if (bind(listenfd_, (struct sockaddr *)&server, sizeof(server)) < 0)
\n {
\n printf("bind fail !!!\\\\n");
\n exit(2);
\n }
\n printf("bind successful!!!\\\\n");<\/p>\n
if (listen(listenfd_, 10) < 0)
\n {
\n printf("listen fail!!!\\\\n");
\n exit(3);
\n }
\n printf("listen successful!!!\\\\n");
\n }<\/p>\n
void service(int sockfd, std::string client_ip, uint16_t client_port)
\n {
\n while (1)
\n {
\n char buffer[1024];
\n ssize_t s = read(sockfd, buffer, sizeof(buffer) – 1);
\n if (s > 0)
\n {
\n buffer[s] = 0;
\n printf("client say:%s\\\\n", buffer);
\n std::string info = "server say:";
\n info += buffer;
\n write(sockfd, info.c_str(), info.size());
\n }
\n else if (s == 0)
\n {
\n printf("client quit !!!\\\\n");
\n break;
\n }
\n else
\n {
\n printf("read error !!!\\\\n");
\n break;
\n }
\n }
\n }<\/p>\n
void start()
\n {
\n while (1)
\n {
\n struct sockaddr_in client;
\n socklen_t len = sizeof(client);
\n int sockfd = accept(listenfd_, (struct sockaddr *)&client, &len);
\n if (sockfd < 0)
\n {
\n printf("accept fail!!!\\\\n");
\n }
\n printf("get a new link !!!, sockfd : %d\\\\n", sockfd);<\/p>\n
uint16_t client_port = ntohs(client.sin_port);
\n char client_ip[16];
\n inet_ntop(AF_INET, &(client.sin_addr), client_ip, sizeof client_ip);<\/p>\n
\/\/\u5355\u8fdb\u7a0b\u7248\u672c
\n \/\/ service(sockfd, client_ip, client_port);
\n \/\/ close(sockfd);<\/p>\n
\/\/\u591a\u8fdb\u7a0b\u7248\u672c
\n pid_t id = fork();
\n if (id == 0)
\n {
\n close(listenfd_);
\n if (fork() > 0)
\n {
\n exit(0);
\n }
\n service(sockfd, client_ip, client_port);
\n close(sockfd);
\n exit(0);
\n }
\n close(sockfd);
\n pid_t ret = waitpid(id, nullptr, 0);
\n }
\n }<\/p>\n
~Server()
\n {
\n close(listenfd_);
\n }<\/p>\n
private:
\n int listenfd_;
\n uint16_t server_port_;
\n std::string server_ip_;
\n};<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260212234324-698e659c0f4ee.png\")
<\/p>\n
\u901a\u8fc7\u8fd9\u6837\u7684\u65b9\u5f0f\u5c31\u53ef\u4ee5\u5f88\u597d\u7684\u4fdd\u8bc1\u591a\u4e2a\u5ba2\u6237\u7aef\u90fd\u53ef\u4ee5\u4eab\u53d7\u5230\u670d\u52a1\u5668\u7684\u670d\u52a1<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260212234324-698e659c76998.png\")
<\/p>\n
\u6709\u5f88\u591a\u4eba\u53ef\u80fd\u770b\u4e0d\u61c2\u8fd9\u6bb5\u4ee3\u7801，\u73b0\u5728\u6211\u6765\u8fdb\u884c\u89e3\u91ca\u4ee5\u4e0b，\u9996\u5148\u6211\u4eec\u521b\u5efa\u5b50\u8fdb\u7a0b\u4e4b\u540e，\u7236\u8fdb\u7a0b\u5fc5\u987b\u5173\u6389sockfd(\u4e5f\u5c31\u662f\u674e\u56db\u5bf9\u5e94\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26)，\u8fd9\u662f\u56e0\u4e3a\u968f\u7740\u5ba2\u6237\u7aef\u7684\u8bbf\u95ee\u4eba\u6570\u589e\u591a，\u5982\u679c\u6211\u4eec\u4e0d\u5173\u95ed，\u5c31\u4f1a\u5bfc\u81f4\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e00\u76f4\u589e\u591a，\u5e76\u4e14\u6211\u4eec\u5c06\u6211\u4eec\u7684\u4efb\u52a1\u4ea4\u7ed9\u5b50\u8fdb\u7a0b\u5904\u7406\u4e4b\u540e，\u7236\u8fdb\u7a0b\u5c31\u4e0d\u9700\u8981\u518d\u7ee7\u7eed\u5360\u7528\u8fd9\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e86，\u5168\u6743\u4ea4\u7ed9\u5b50\u8fdb\u7a0b\u5c31\u53ef\u4ee5\u4e86，\u8fd9\u6837\u5c31\u53ef\u4ee5\u7f13\u89e3\u7236\u8fdb\u7a0b\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e00\u76f4\u589e\u591a\u7684\u95ee\u9898\u3002<\/p>\n
\u800c\u5728\u6211\u4eec\u7684\u5b50\u8fdb\u7a0b\u4e2d，\u6211\u4e3a\u4ec0\u4e48\u8981\u7ee7\u7eed\u521b\u5efa\u5b50\u8fdb\u7a0b\u5462？\u8fd9\u662f\u56e0\u4e3a\u6211\u4eec\u521b\u5efa\u5b8c\u5b50\u8fdb\u7a0b\u4e4b\u540e，\u7236\u8fdb\u7a0b\u9700\u8981\u5bf9\u5b50\u8fdb\u7a0b\u7684\u9000\u51fa\u72b6\u6001\u8fdb\u884c\u7b49\u5f85\u56de\u6536，\u8fd9\u5c31\u4f1a\u5bfc\u81f4\u6211\u4eec\u7684\u7236\u8fdb\u7a0b\u88ab\u963b\u585e，\u5f71\u54cd\u6211\u4eec\u4e0e\u4e0b\u4e00\u4e2a\u5ba2\u6237\u7aef\u7684\u8fde\u63a5，\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u5728\u5b50\u8fdb\u7a0b\u4e2d\u518d\u521b\u5efa\u5b50\u8fdb\u7a0b(\u5b59\u5b50\u8fdb\u7a0b)，\u7136\u540e\u8ba9\u5b50\u8fdb\u7a0b\u76f4\u63a5\u9000\u51fa，\u8fd9\u6837\u7236\u8fdb\u7a0b\u5c31\u53ef\u4ee5\u76f4\u63a5\u83b7\u53d6\u5230\u9000\u51fa\u7ed3\u679c，\u4e5f\u5c31\u4e0d\u9700\u8981\u7ee7\u7eed\u7b49\u5f85，\u800c\u5bf9\u4e8e\u5b59\u5b50\u8fdb\u7a0b，\u5f53\u5b83\u7684\u7236\u8fdb\u7a0b(\u4e5f\u5c31\u662f\u5b50\u8fdb\u7a0b)\u9000\u51fa\u4e4b\u540e，\u5b59\u5b50\u8fdb\u7a0b\u5c31\u4f1a\u88ab\u6258\u5b64，\u4ea4\u7ed9\u6211\u4eec\u7684\u64cd\u4f5c\u7cfb\u7edf\u8fdb\u884c\u56de\u6536，\u6240\u4ee5\u6211\u4eec\u4e0d\u5fc5\u62c5\u5fc3\u5b59\u5b50\u8fdb\u7a0b\u4f1a\u6210\u4e3a\u50f5\u5c38\u8fdb\u7a0b\u3002\u8fd9\u6837\u5c31\u5b9e\u73b0\u4e86\u4e00\u4e2a\u591a\u8fdb\u7a0b\u7248\u672c\u7684TCP\u670d\u52a1\u7aef\u3002<\/p>\n
\u7b80\u800c\u8a00\u4e4b\u5c31\u662f\u5982\u4e0b：<\/p>\n
1\ufe0f\u20e3 \u7236\u8fdb\u7a0b\u5fc5\u987b\u5173\u95ed sockfd<\/h4>\n
\u5426\u5219：<\/p>\n
- \n
- \n
\u6587\u4ef6\u63cf\u8ff0\u7b26\u4f1a\u4e0d\u65ad\u589e\u52a0<\/p>\n<\/li>\n
- \n
\u9020\u6210\u8d44\u6e90\u6cc4\u6f0f<\/p>\n<\/li>\n<\/ul>\n
\u56e0\u4e3a\u4efb\u52a1\u5df2\u7ecf\u4ea4\u7ed9\u5b50\u8fdb\u7a0b，\u7236\u8fdb\u7a0b\u6ca1\u5fc5\u8981\u518d\u6301\u6709\u3002<\/p>\n
\n2\ufe0f\u20e3 \u53cc fork \u9632\u6b62\u50f5\u5c38\u8fdb\u7a0b<\/h4>\n
\u7236\u8fdb\u7a0b \u2514\u2500\u2500 \u5b50\u8fdb\u7a0b \u2514\u2500\u2500 \u5b59\u5b50\u8fdb\u7a0b <\/p>\n
\u5f53\u5b50\u8fdb\u7a0b\u9000\u51fa：<\/p>\n
- \n
- \n
\u5b59\u5b50\u8fdb\u7a0b\u53d8\u6210\u5b64\u513f\u8fdb\u7a0b<\/p>\n<\/li>\n
- \n
\u7531 init \u63a5\u7ba1<\/p>\n<\/li>\n
- \n
\u81ea\u52a8\u56de\u6536<\/p>\n<\/li>\n<\/ul>\n
\u5ffd\u7565 SIGCHLD\u4fe1\u53f7<\/h3>\n
\u6211\u4eec\u8fd8\u53ef\u4ee5\u4e0d\u7528\u7236\u8fdb\u7a0b\u8fdb\u884c\u7b49\u5f85，\u5229\u7528\u6211\u4eec\u5728\u4fe1\u53f7\u90a3\u91cc\u5b66\u5230\u7684\u4e1c\u897f，\u901a\u8fc7\u5bf9SIGCHLD\u4fe1\u53f7\u8fdb\u884c\u5ffd\u7565，\u8fd9\u6837\u5b50\u8fdb\u7a0b\u5728\u9000\u51fa\u4e4b\u540e，\u4e5f\u4e0d\u4f1a\u51fa\u73b0\u50f5\u5c38\u8fdb\u7a0b，\u540c\u65f6\u7236\u8fdb\u7a0b\u8fd8\u53ef\u4ee5\u7ee7\u7eed\u76d1\u542c\u3002<\/p>\n
class Server
\n{
\npublic:
\n Server(uint16_t server_port, std::string server_ip)
\n : server_port_(server_port), server_ip_(server_ip)
\n {
\n }<\/p>\nvoid init()
\n {<\/p>\nlistenfd_ = socket(AF_INET, SOCK_STREAM, 0);
\n if (listenfd_ < 0)
\n {
\n printf("listenfd_ create error!!!\\\\n");
\n exit(1);
\n }
\n printf("listenfd_ create successful!!!, listenfd_:%d\\\\n", listenfd_);<\/p>\nstruct sockaddr_in server;
\n memset(&server, 0, sizeof server);
\n server.sin_family = AF_INET;
\n server.sin_port = htons(server_port_);
\n inet_pton(AF_INET, server_ip_.c_str(), &(server.sin_addr));<\/p>\nif (bind(listenfd_, (struct sockaddr *)&server, sizeof(server)) < 0)
\n {
\n printf("bind fail !!!\\\\n");
\n exit(2);
\n }
\n printf("bind successful!!!\\\\n");<\/p>\nif (listen(listenfd_, 10) < 0)
\n {
\n printf("listen fail!!!\\\\n");
\n exit(3);
\n }
\n printf("listen successful!!!\\\\n");
\n }<\/p>\nvoid service(int sockfd, std::string client_ip, uint16_t client_port)
\n {
\n while (1)
\n {
\n char buffer[1024];
\n ssize_t s = read(sockfd, buffer, sizeof(buffer) – 1);
\n if (s > 0)
\n {
\n buffer[s] = 0;
\n printf("client say:%s\\\\n", buffer);
\n std::string info = "server say:";
\n info += buffer;
\n write(sockfd, info.c_str(), info.size());
\n }
\n else if (s == 0)
\n {
\n printf("client quit !!!\\\\n");
\n break;
\n }
\n else
\n {
\n printf("read error !!!\\\\n");
\n break;
\n }
\n }
\n }<\/p>\nvoid start()
\n {
\n while (1)
\n {
\n signal(SIGCHLD, SIG_IGN);
\n struct sockaddr_in client;
\n socklen_t len = sizeof(client);
\n int sockfd = accept(listenfd_, (struct sockaddr *)&client, &len);
\n if (sockfd < 0)
\n {
\n printf("accept fail!!!\\\\n");
\n }
\n printf("get a new link !!!, sockfd : %d\\\\n", sockfd);<\/p>\nuint16_t client_port = ntohs(client.sin_port);
\n char client_ip[16];
\n inet_ntop(AF_INET, &(client.sin_addr), client_ip, sizeof client_ip);<\/p>\n\/\/ \u5355\u8fdb\u7a0b\u7248\u672c
\n \/\/ service(sockfd, client_ip, client_port);
\n \/\/ close(sockfd);<\/p>\n\/\/ \u591a\u8fdb\u7a0b\u7248\u672c
\n \/\/ pid_t id = fork();
\n \/\/ if (id == 0)
\n \/\/ {
\n \/\/ close(listenfd_);
\n \/\/ if (fork() > 0)
\n \/\/ {
\n \/\/ exit(0);
\n \/\/ }
\n \/\/ service(sockfd, client_ip, client_port);
\n \/\/ close(sockfd);
\n \/\/ exit(0);
\n \/\/ }
\n \/\/ close(sockfd);
\n \/\/ pid_t ret = waitpid(id, nullptr, 0);<\/p>\n\/\/ \u4fe1\u53f7
\n pid_t id = fork();
\n if (id == 0)
\n {
\n close(listenfd_);
\n service(sockfd, client_ip, client_port);
\n close(sockfd);
\n exit(0);
\n }
\n close(sockfd);
\n }
\n }<\/p>\n~Server()
\n {
\n close(listenfd_);
\n }<\/p>\nprivate:
\n int listenfd_;
\n uint16_t server_port_;
\n std::string server_ip_;
\n};<\/p>\nsignal(SIGCHLD, SIG_IGN); <\/p>\n
\u8ba9\u5185\u6838\u81ea\u52a8\u56de\u6536\u5b50\u8fdb\u7a0b\u3002<\/p>\n
\u591a\u7ebf\u7a0b\u7248\u672c TCP \u670d\u52a1\u5668<\/h2>\n
\u4f46\u662f\u5f53\u5ba2\u6237\u8d8a\u6765\u8d8a\u591a\u65f6，\u6211\u4eec\u901a\u8fc7\u521b\u5efa\u591a\u7ebf\u7a0b\u7684\u65b9\u5f0f\u5b9e\u5728\u5f88\u6d88\u8017\u8d44\u6e90，\u6240\u4ee5\u6211\u4eec\u8fd8\u53ef\u4ee5\u901a\u8fc7\u591a\u7ebf\u7a0b\u7684\u65b9\u5f0f\u3002<\/p>\n
class Server;<\/p>\n
struct ThreadData
\n{
\n ThreadData(int sockfd, int16_t client_port, std::string client_ip, Server *srv)
\n : sockfd_(sockfd), client_port_(client_port), client_ip_(client_ip), srv_(srv)
\n {
\n }
\n int sockfd_;
\n int16_t client_port_;
\n std::string client_ip_;
\n Server *srv_;
\n};<\/p>\nclass Server
\n{
\npublic:
\n Server(uint16_t server_port, std::string server_ip)
\n : server_port_(server_port), server_ip_(server_ip)
\n {
\n }<\/p>\nvoid init()
\n {<\/p>\nlistenfd_ = socket(AF_INET, SOCK_STREAM, 0);
\n if (listenfd_ < 0)
\n {
\n printf("listenfd_ create error!!!\\\\n");
\n exit(1);
\n }
\n printf("listenfd_ create successful!!!, listenfd_:%d\\\\n", listenfd_);<\/p>\nstruct sockaddr_in server;
\n memset(&server, 0, sizeof server);
\n server.sin_family = AF_INET;
\n server.sin_port = htons(server_port_);
\n inet_pton(AF_INET, server_ip_.c_str(), &(server.sin_addr));<\/p>\nif (bind(listenfd_, (struct sockaddr *)&server, sizeof(server)) < 0)
\n {
\n printf("bind fail !!!\\\\n");
\n exit(2);
\n }
\n printf("bind successful!!!\\\\n");<\/p>\nif (listen(listenfd_, 10) < 0)
\n {
\n printf("listen fail!!!\\\\n");
\n exit(3);
\n }
\n printf("listen successful!!!\\\\n");
\n }<\/p>\nvoid service(int sockfd, std::string client_ip, uint16_t client_port)
\n {
\n while (1)
\n {
\n char buffer[1024];
\n ssize_t s = read(sockfd, buffer, sizeof(buffer) – 1);
\n if (s > 0)
\n {
\n buffer[s] = 0;
\n printf("client say:%s\\\\n", buffer);
\n std::string info = "server say:";
\n info += buffer;
\n write(sockfd, info.c_str(), info.size());
\n }
\n else if (s == 0)
\n {
\n printf("client quit !!!\\\\n");
\n break;
\n }
\n else
\n {
\n printf("read error !!!\\\\n");
\n break;
\n }
\n }
\n }<\/p>\nstatic void *routine(void *arg)
\n {
\n pthread_detach(pthread_self());
\n ThreadData *td = (ThreadData *)arg;
\n td->srv_->service(td->sockfd_, td->client_ip_, td->client_port_);
\n close(td->sockfd_);
\n delete td;
\n return nullptr;
\n }<\/p>\nvoid start()
\n {
\n while (1)
\n {
\n signal(SIGCHLD, SIG_IGN);
\n struct sockaddr_in client;
\n socklen_t len = sizeof(client);
\n int sockfd = accept(listenfd_, (struct sockaddr *)&client, &len);
\n if (sockfd < 0)
\n {
\n printf("accept fail!!!\\\\n");
\n }
\n printf("get a new link !!!, sockfd : %d\\\\n", sockfd);<\/p>\nuint16_t client_port = ntohs(client.sin_port);
\n char client_ip[16];
\n inet_ntop(AF_INET, &(client.sin_addr), client_ip, sizeof client_ip);<\/p>\n\/\/ \u5355\u8fdb\u7a0b\u7248\u672c
\n \/\/ service(sockfd, client_ip, client_port);
\n \/\/ close(sockfd);<\/p>\n\/\/ \u591a\u8fdb\u7a0b\u7248\u672c
\n \/\/ pid_t id = fork();
\n \/\/ if (id == 0)
\n \/\/ {
\n \/\/ close(listenfd_);
\n \/\/ if (fork() > 0)
\n \/\/ {
\n \/\/ exit(0);
\n \/\/ }
\n \/\/ service(sockfd, client_ip, client_port);
\n \/\/ close(sockfd);
\n \/\/ exit(0);
\n \/\/ }
\n \/\/ close(sockfd);
\n \/\/ pid_t ret = waitpid(id, nullptr, 0);<\/p>\n\/\/ \u4fe1\u53f7
\n \/\/ pid_t id = fork();
\n \/\/ if (id == 0)
\n \/\/ {
\n \/\/ close(listenfd_);
\n \/\/ service(sockfd, client_ip, client_port);
\n \/\/ close(sockfd);
\n \/\/ exit(0);
\n \/\/ }
\n \/\/ close(sockfd);<\/p>\n\/\/ \u591a\u7ebf\u7a0b\u7248\u672c
\n pthread_t tid;
\n ThreadData *td = new ThreadData(sockfd, client_port, client_ip, this);
\n pthread_create(&tid, nullptr, routine, td);
\n }
\n }<\/p>\n~Server()
\n {
\n close(listenfd_);
\n }<\/p>\nprivate:
\n int listenfd_;
\n uint16_t server_port_;
\n std::string server_ip_;
\n};<\/p>\n\u5bf9\u4e8e\u591a\u7ebf\u7a0b\u7248\u672c\u7684TCP\u670d\u52a1\u5668，\u6211\u4eec\u8981\u6ce8\u610f\u7c7b\u6210\u5458\u51fd\u6570\u9ed8\u8ba4\u9690\u85cf\u4e00\u4e2a this \u6307\u9488：<\/p>\n
void routine(Server* this, void*)<\/p>\n
\u800c\u6211\u4eec\u7684\u591a\u7ebf\u7a0b\u7684\u5904\u7406\u51fd\u6570\u4e2d\u8981\u6c42\u51fd\u6570\u7b7e\u540d\u4e3a：<\/p>\n
void* (*)(void*)<\/p>\n
\u56e0\u6b64\u5c31\u4f1a\u9020\u6210\u7c7b\u578b\u4e0d\u5339\u914d\u7684\u95ee\u9898，\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u6211\u4eec\u8981\u8ba9\u5b83\u6210\u4e3a\u4e00\u4e2a\u5168\u5c40\u7684\u51fd\u6570，\u6240\u4ee5\u8981\u589e\u52a0static：<\/p>\n
static void* routine(void*)<\/p>\n
\u800c\u4e14\u5168\u5c40\u51fd\u6570\u60f3\u8981\u8c03\u7528\u7c7b\u5185\u65b9\u6cd5\u662f\u4e0d\u53ef\u4ee5\u7684，\u6240\u4ee5\u6211\u4eec\u589e\u52a0\u4e86\u4e00\u4e2athis\u6307\u9488，\u8fd9\u6837\u5c31\u53ef\u4ee5\u8c03\u7528\u7c7b\u5185\u7684\u65b9\u6cd5\u4e86：<\/p>\n
struct ThreadData
\n{
\n ThreadData(int sockfd, int16_t client_port, std::string client_ip, Server *srv)
\n : sockfd_(sockfd), client_port_(client_port), client_ip_(client_ip), srv_(srv)
\n {
\n }
\n int sockfd_;
\n int16_t client_port_;
\n std::string client_ip_;
\n Server *srv_;
\n};<\/p>\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 pthread_t tid;<\/p>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 ThreadData *td = new ThreadData(sockfd, client_port, client_ip, this);<\/p>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 pthread_create(&tid, nullptr, routine, td);<\/p>\n
\u4e09\u79cd\u6a21\u578b\u5bf9\u6bd4\u603b\u7ed3<\/h2>\n
\n
\u6a21\u578b\u5e76\u53d1\u80fd\u529b\u8d44\u6e90\u6d88\u8017\u9002\u7528\u573a\u666f<\/tr>\n \n\n \u5355\u8fdb\u7a0b<\/td>\n \u274c<\/td>\n \u4f4e<\/td>\n \u7406\u89e3<\/td>\n<\/tr>\n \n \u591a\u8fdb\u7a0b<\/td>\n \u2705<\/td>\n \u9ad8<\/td>\n \u4e2d\u5c0f\u5e76\u53d1<\/td>\n<\/tr>\n \n \u591a\u7ebf\u7a0b<\/td>\n \u2705<\/td>\n \u4e2d<\/td>\n \u5e38\u89c1\u670d\u52a1\u5668<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u5230\u8fd9\u91cc，\u6211\u4eec\u4ece\u6700\u7b80\u5355\u7684\u5355\u8fdb\u7a0b\u7248\u672c，\u4e00\u6b65\u4e00\u6b65\u6539\u9020\u6210\u591a\u8fdb\u7a0b\u3001\u591a\u7ebf\u7a0b\u7248\u672c\u3002<\/p>\n
\u4ee3\u7801\u53d8\u591a\u4e86，\u7ed3\u6784\u4e5f\u590d\u6742\u4e86，\u4f46\u6838\u5fc3\u5176\u5b9e\u5f88\u7b80\u5355：<\/p>\n
\u8ba9\u670d\u52a1\u5668\u540c\u65f6\u670d\u52a1\u591a\u4e2a\u5ba2\u6237\u7aef\u3002<\/p>\n
\u5355\u8fdb\u7a0b\u80fd\u8dd1\u8d77\u6765，\u591a\u8fdb\u7a0b\u80fd\u5e76\u53d1，\u591a\u7ebf\u7a0b\u66f4\u9ad8\u6548\u3002<\/p>\n
\u73b0\u5728\u76f8\u4fe1\u6211\u4eec\u5bf9 TCP \u670d\u52a1\u5668\u7684\u6574\u4f53\u6846\u67b6\u5c31\u6709\u4e86\u4e00\u5b9a\u6e05\u6670\u7684\u8ba4\u8bc6\u4e86\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5728\u4e0a\u4e00\u7bc7\u535a\u5ba2\u4e2d，\u6211\u4eec\u57fa\u4e8e UDP \u5b9e\u73b0\u4e86\u4e00\u4e2a\u7b80\u5355\u7684\u7fa4\u804a\u6a21\u578b\u3002\u4eca\u5929，\u6211\u4eec\u6b63\u5f0f\u8fdb\u5165 TCP \u7f51\u7edc\u7f16\u7a0b，\u5b9e\u73b0\u4e00\u4e2a\u6700\u7ecf\u5178\u7684\u529f\u80fd \u2014\u2014🧾 \u670d\u52a1\u5668\u56de\u663e（Echo Server）\u5c31\u662f\u6211\u4eec\u53d1\u9001\u7684\u6d88\u606f，\u670d\u52a1\u5668\u4e0d\u505a\u5904\u7406，\u76f4\u63a5\u7ed9\u6211\u4eec\u8fd4\u56de\u5373\u53ef\u3002\u4e00\u3001TCP \u670d\u52a1\u5668\u6574\u4f53\u6d41\u7a0b\u4e00\u4e2a\u6700\u57fa\u7840\u7684 TCP \u670d\u52a1\u5668，\u9700\u8981\u7ecf\u5386\u4ee5\u4e0b\u6b65\u9aa4：socket() bind() listen<\/p>\n","protected":false},"author":2,"featured_media":75783,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[58,1170,970,396,3433],"topic":[],"class_list":["post-75788","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-linux","tag-socket","tag-tcp","tag-396","tag-3433"],"yoast_head":"\n
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