66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
#include <iostream>
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#include <cstring>
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//#include <cstdlib>
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#include <unistd.h>
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#include <netdb.h>
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//#include <sys/types.h>
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//#include <sys/socket.h>
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//#include <arpa/inet.h>
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using namespace std;
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int net_send(char *argv[], char *buffer) {
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if(strlen(buffer) > 1024) {
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cout << "字符串长度超出限制" << endl; return -1;
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}
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// 创建客户端socket
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int sockfd = socket(AF_INET, SOCK_STREAM, 0);
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if(sockfd == -1) {
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cout << "socket创建失败" << endl; return -1;
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}
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// 向服务端请求连接
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struct hostent* h;
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if( (h = gethostbyname(argv[1])) == 0) {
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cout << "地址不正确" << endl; close(sockfd); return -1;
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}
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struct sockaddr_in servaddr;
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memset(&servaddr, 0, sizeof(servaddr));
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servaddr.sin_family = AF_INET;
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servaddr.sin_port = htons(atoi(argv[2])); //指定连接端口
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memcpy(&servaddr.sin_addr, h->h_addr, h->h_length);
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if(connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) != 0) { //发起连接请求
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cout << "连接失败" << endl; close(sockfd); return -1;
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}
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// 客户端通信
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if(send(sockfd, buffer, strlen(buffer), 0) <= 0) { //发送请求报文
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cout << "请求报文发送不成功" << endl; return -1;
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}
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//接收服务端回应报文， recv()将阻塞等待
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memset(buffer, 0, sizeof(buffer));
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if(recv(sockfd, buffer, sizeof(buffer), 0) <= 0) {
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cout << "服务器断开--未成功接收回应报文" << endl; return -1;
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}
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// 回应报文
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cout << buffer << endl;
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//关闭连接
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close(sockfd);
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return 0;
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}
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int main(int argc, char *argv[]) {
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if(argc != 3) {
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cout << "参数不正确" << endl; return -1;
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}
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char buffer[1024];
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memset(buffer, 0, sizeof(buffer));
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cout << "input data : ";
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fgets(buffer, sizeof(buffer), stdin);
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net_send(argv, buffer);
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return 0;
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}
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