TCP 基礎代碼

//tcp_server.c #include<stdio.h> #include<error.h> #include<sys/types.h> #include<string.h> #include<unistd.h> #include<sys/socket.h> #include<netinet/in.h> #include <arpa/inet.h> #include<stdlib.h> #include<error.h>int Startup(char* ip, int port) {printf("port: %d\n", port);struct sockaddr_in local;local.sin_family = AF_INET;local.sin_port = htons(port);local.sin_addr.s_addr = inet_addr(ip);//設置套接字int sock = socket(AF_INET, SOCK_STREAM, 0);if(sock == -1){perror("socket\n");exit(2);}//綁定if(bind(sock, (struct sockaddr*)&local, sizeof(local)) < 0){perror("bind\n");exit(3);}//監聽int ret = listen(sock, 5);if(ret == -1){perror("listen_sock\n");exit(3);}return sock; }void Server(int new_sock, char* ip, int port) {char buf[1024];while(1){buf[0] = 0;int s = read(new_sock, buf, sizeof(buf));if(s > 0){buf[s] = 0;printf("[%s, %d] say# %s\n", ip, port, buf);write(new_sock, buf, strlen(buf));}else if(s == 0){printf("[%s, %d] quit\n", ip, port);exit(4);}else{perror("read\n");exit(5);}} }int main(int argc, char* argv[]) {if(argc != 3){printf("Usage: %s [ip] [port]\n", argv[0]);exit(1);}//此時的套接字已經是監聽套接字int listen_sock = Startup(argv[1], atoi(argv[2]));printf("listen and bind is sucessful!\n");//建立連接struct sockaddr_in peer;while(1){socklen_t len = sizeof(peer);//此時的套接字已經是監聽套接字int new_sock = accept(listen_sock, (struct sockaddr*)&peer, &len);//此時返回的這個套接字就是負責服務的套接字if(new_sock == -1){printf("accept is error!\n");continue;}char* ip = inet_ntoa(peer.sin_addr);int port = ntohs(peer.sin_port);printf("get a new connet ip is %s, port is %d...\n", ip, port);//服務Server(new_sock, ip, port);//關閉文件描述符}return 0; } //tcp_client.c #include<stdio.h> #include<error.h> #include<sys/types.h> #include<string.h> #include<unistd.h> #include<sys/socket.h> #include<netinet/in.h> #include <arpa/inet.h> #include<stdlib.h> #include<error.h>int main(int argc, char* argv[]) {if(argc != 3){printf("Usage %s [ip], [port]\n", argv[0]);exit(1);}//建立套接字int sock = socket(AF_INET, SOCK_STREAM, 0);if(sock == -1){perror("socket\n");exit(2);}struct sockaddr_in server;server.sin_family = AF_INET;server.sin_addr.s_addr = inet_addr(argv[1]);server.sin_port = htons(atoi(argv[2]));//發起連接if(connect(sock, (struct sockaddr*)&server, sizeof(server)) == -1){perror("connect\n");exit(3);}while(1){printf("Please enter#");fflush(stdout);char buf[1024];buf[0] = 0;int s = read(0, buf, sizeof(buf));if(s > 0){buf[s - 1] = 0;if(strcmp(buf, "quit") == 0){printf("client quit!\n");}write(sock, buf, strlen(buf));s = read(sock, buf, sizeof(buf) - 1);buf[s] = 0;printf("Server Echo#%s\n", buf);}}close(sock);return 0; }

TCP 多進程多線程版本

//server.c #include<stdio.h> #include<error.h> #include<sys/types.h> #include<string.h> #include<unistd.h> #include<sys/socket.h> #include<netinet/in.h> #include <arpa/inet.h> #include<stdlib.h> #include<error.h>int main(int argc, char* argv[]) {if(argc != 3){printf("Usage %s [ip], [port]\n", argv[0]);exit(1);}//建立套接字int sock = socket(AF_INET, SOCK_STREAM, 0);if(sock == -1){perror("socket\n");exit(2);}struct sockaddr_in server;server.sin_family = AF_INET;server.sin_addr.s_addr = inet_addr(argv[1]);server.sin_port = htons(atoi(argv[2]));//發起連接if(connect(sock, (struct sockaddr*)&server, sizeof(server)) == -1){perror("connect\n");exit(3);}while(1){printf("Please enter#");fflush(stdout);char buf[1024];buf[0] = 0;int s = read(0, buf, sizeof(buf));if(s > 0){buf[s - 1] = 0;if(strcmp(buf, "quit") == 0){printf("client quit!\n");}write(sock, buf, strlen(buf));s = read(sock, buf, sizeof(buf) - 1);buf[s] = 0;printf("Server Echo#%s\n", buf);}}close(sock);return 0; } //client.c #include<stdio.h> #include<error.h> #include<sys/types.h> #include<string.h> #include<unistd.h> #include<sys/socket.h> #include<netinet/in.h> #include <arpa/inet.h> #include<stdlib.h> #include<error.h>int main(int argc, char* argv[]) {if(argc != 3){printf("Usage %s [ip], [port]\n", argv[0]);exit(1);}//建立套接字int sock = socket(AF_INET, SOCK_STREAM, 0);if(sock == -1){perror("socket\n");exit(2);}struct sockaddr_in server;server.sin_family = AF_INET;server.sin_addr.s_addr = inet_addr(argv[1]);server.sin_port = htons(atoi(argv[2]));//發起連接if(connect(sock, (struct sockaddr*)&server, sizeof(server)) == -1){perror("connect\n");exit(3);}while(1){printf("Please enter#");fflush(stdout);char buf[1024];buf[0] = 0;int s = read(0, buf, sizeof(buf));if(s > 0){buf[s - 1] = 0;if(strcmp(buf, "quit") == 0){printf("client quit!\n");}write(sock, buf, strlen(buf));s = read(sock, buf, sizeof(buf) - 1);buf[s] = 0;printf("Server Echo#%s\n", buf);}}close(sock);return 0; }

總結

以上是生活随笔為你收集整理的TCP相关代码的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。