1. 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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原文链接:https://blog.csdn.net/Mculover666/article/details/105614202