#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <errno.h>

#include <cstdio>

#include <cstdlib>

#include <cstring>

#include <netdb.h>

#include <iostream>

using namespace std;

int const MAXLINE = 500;

char const* ip = "192.168.10.111";

int const SERV_PORT = 3434;

void dg_cli(int sockfd, char* sendline, sockaddr const* pservaddr, socklen_t servlen)

{

char recvline[MAXLINE + 1];

socklen_t en;

auto preply_addr = (sockaddr*)malloc(servlen);

sendto(sockfd, sendline, strlen(sendline), 0, pservaddr, servlen);

socklen_t len = servlen;

int n = recvfrom(sockfd, recvline, MAXLINE, 0, preply_addr, &len);

cout << "\n" << len << ":" << servlen << "\n";

if (len != servlen || memcmp(pservaddr, preply_addr, len) != 0)

printf("error");

recvline[n] = 0; //

printf (recvline);

}

int main(int argc, char **argv)

{

if (argc <2)

{

cout << "too few arg";

return 1;

}

int sockfd;

sockaddr_in servaddr;

bzero(&servaddr, sizeof(servaddr));

servaddr.sin_family = AF_INET;

servaddr.sin_port = htons(SERV_PORT);

inet_pton(AF_INET, "192.168.10.108", &servaddr.sin_addr);

sockfd = socket(AF_INET, SOCK_DGRAM, 0);

string msg(argv[1]);

dg_cli(sockfd, argv[1], (sockaddr *) &servaddr, sizeof(servaddr));

exit(0);

}