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//
// Created by jxq on 19-8-8.
//
// socket编程 13
#include <iostream>
#include <unistd.h>
#include <stdlib.h>
#include <error.h>
#include <sys/types.h> /* See NOTES */
#include <sys/socket.h>
#include <cstring>
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
using namespace std;
#define ERR_EXIT(m) \
do \
{ \
perror(m); \
exit(EXIT_FAILURE); \
} while (0);
int main(void)
{
int sock;
if ((sock = socket(PF_INET, SOCK_DGRAM, 0)) < 0)
{
ERR_EXIT("socket");
}
struct sockaddr_in server_addr;
int srvlen;
memset(&server_addr, 0, sizeof server_addr);
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(6666);
server_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
struct sockaddr_in localaddr;
socklen_t addrlen = sizeof localaddr;
if (getsockname(sock, (struct sockaddr*)&localaddr, &addrlen) < 0)
{
ERR_EXIT("getsockname");
}
printf("id = %s, ", inet_ntoa(localaddr.sin_addr));
printf("port = %d\n", ntohs(localaddr.sin_port));
char sendbuf[1024];
int ret;
char recvbuf[1024];
while (fgets(sendbuf, sizeof sendbuf, stdin) != NULL)
{
srvlen = sizeof server_addr;
sendto(sock, sendbuf, sizeof(sendbuf), 0, (struct sockaddr *)&server_addr, srvlen);
// cout << sendbuf << endl;
ret = recvfrom(sock, recvbuf, sizeof(recvbuf), 0, NULL, NULL);
if (ret == -1)
{
if (errno == EINTR)
{
continue;
}
ERR_EXIT("recvfrom")
}
else if (ret > 0)
{
fputs(recvbuf, stdout);
// sendto(sock, recvbuf, n, 0, (struct sockaddr *)&peeraddr, peerlen);
}
memset(sendbuf, 0, sizeof sendbuf);
memset(recvbuf, 0, sizeof recvbuf);
}
return 0;
}
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