Linux UDP服务端和客户端 Linux UDP服务端和客户端程序的实现
Mculover666 人气:01. 源码
UDP服务端:
/** * @brief UDP服务端 * @author Mculover666 * @date 2020/04/15 */ #include <stdio.h> #include <unistd.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <stdlib.h> #include <string.h> int main(int argc, char* argv[]) { int server_sock_fd; struct sockaddr_in server_addr, client_addr; char recv_buf[100]; int nbytes = 0; socklen_t len = 0; /* 创建Server Socket */ server_sock_fd = socket(AF_INET, SOCK_DGRAM, 0); if (server_sock_fd < 0) { printf("服务端Socket创建失败"); return -1; } printf("服务端Socket创建成功\n"); /* 绑定ip和端口 */ bzero(&server_addr, sizeof(server_addr)); server_addr.sin_family = AF_INET; server_addr.sin_addr.s_addr = htonl(INADDR_ANY); server_addr.sin_port = htons(atoi(argv[1]));//指定端口号 bind(server_sock_fd, (struct sockaddr *) &server_addr, sizeof(server_addr)); printf("服务端Socket绑定成功\n"); while(1) { /* 接收UDP客户端的数据 */ printf("等待接收客户端数据:\n"); len = sizeof(client_addr); nbytes = recvfrom(server_sock_fd, recv_buf, 100, 0, (struct sockaddr *)&client_addr, &len); printf("ok\n"); recv_buf[nbytes] = '\0'; printf("recv %d bytes:%s.\n", nbytes, recv_buf); //接收用户输入,发送给客户端 printf("请输入要发送给客户端的数据:"); fgets(recv_buf, 100, stdin); sendto(server_sock_fd,recv_buf,strlen(recv_buf),0,(struct sockaddr *)&client_addr,len); } return 0; }
UDP客户端:
/** * @brief UDP客户端程序 * @author Mculover666 * @date 2020/04/15 */ #include <stdio.h> #include <unistd.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <stdlib.h> #include <string.h> int main(int argc, char* argv[]) { int sock_fd; struct sockaddr_in server_addr; char recv_buf[100]; int nbytes = 0; socklen_t len = 0; /* 创建Socket */ sock_fd = socket(AF_INET, SOCK_DGRAM, 0); if (sock_fd < 0) { printf("客户端Socket创建失败"); return -1; } /* 绑定ip和端口 */ bzero(&server_addr, sizeof(server_addr)); server_addr.sin_family = AF_INET; server_addr.sin_addr.s_addr = inet_addr(argv[1]); server_addr.sin_port = htons(atoi(argv[2]));//指定端口号 while(1) { len = sizeof(server_addr); //接收用户输入,发送给服务端 printf("请输入要发送给服务端的数据:"); fgets(recv_buf, 100, stdin); sendto(sock_fd,recv_buf,100,0,(struct sockaddr *)(&server_addr),len); /* 接收UDP客户端的数据 */ len = sizeof(server_addr); nbytes = recvfrom(sock_fd, recv_buf, 100, 0, (struct sockaddr *)&server_addr, &len); recv_buf[nbytes] = '\0'; printf("recv %d bytes:%s.\n", nbytes, recv_buf); } return 0; }
2. 在本机运行结果
编译:
gcc server.c -o srever_wangshiwei.o gcc client.c -o client_wangshiwei.o
运行:
3. 在开发板与PC之间运行结果
编译:
gcc server.c -o srever_wangshiwei.o arm-linux-gnueabi-gcc client.c -o clientARM_wangshiwei.o
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