tcp_client.rar_C# 的TCP/IP助手_TCP串口助手_TCP助手_TCP连接模拟_tcp 助手

#include <stdio.h> #include <errno.h> #include <unistd.h> #include <string.h> #include <strings.h> #include <sys/types.h> #include <sys/socket.h> #include <arpa/inet.h> #define SERV_PORT 10088 //TCP服务器端口号 #define SERV_ADDR "192.168.8.100" //TCP服务器IP地址 int main(int argc, char *argv[]) { int sockfd = socket(AF_INET, SOCK_STREAM, 0); if (sockfd < 0) { printf("create socket error\n"); return -1; } struct sockaddr_in servaddr; bzero(&servaddr, sizeof(servaddr)); servaddr.sin_family = AF_INET; //使用 IPv4 进行通信 //servaddr.sin_addr.s_addr = htonl(SERV_ADDR); inet_pton(AF_INET, SERV_ADDR, &(servaddr.sin_addr)); //servaddr.sin_port = htons(SERV_PORT); servaddr.sin_port = htons(SERV_PORT); if(connect(sockfd, (const struct sockaddr *)&servaddr, sizeof(servaddr)) < 0){ printf("failed to connect to server: %s\n", strerror(errno)); close(sockfd); return -1; } ssize_t n; if((n = write(sockfd, "hello, world", sizeof("hello, world"))) < 0){ printf("send error\n"); } printf("n = %d\n", n); char buf[1024]; if(read(sockfd, buf, sizeof(buf)) > 0){ printf("buf: %s\n", buf); } close(sockfd); return 0; }