github.com 설정하기

 

https://github.com/Or71nH/TcpComm/blob/master/README.md

 

 

# TcpComm
TCP/IP Server and Client Program  on Ubuntu Linux

1. How to compile for server 

    $ gcc -o server server.c
    
2. How to compile for client

    $ gcc -o client client.c
    
3. Run the server 

    ./ server 9190
    
4. Run the client

    ./client 127.0.0. 9190

 

 

 

 

위에 변경되서  업데이트 해와야함 

 

mes@ubuntu:~/TcpComm$ git pull origin master

 

 

 

 

 

 

 

 

 

 

git

 

 

 

get_buf.c 받는넘 

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/socket.h>
void error_handling(char *message);

int main(int argc, char *argv[])
{
	int sock;
	int snd_buf, rcv_buf, state;
	socklen_t len;
	
	sock=socket(PF_INET, SOCK_STREAM, 0);
	len=sizeof(snd_buf);
	state=getsockopt(sock, SOL_SOCKET, SO_SNDBUF, (void*)&snd_buf, &len);
	if(state)
		error_handling("getsockopt() error");

	len=sizeof(rcv_buf);
	state=getsockopt(sock, SOL_SOCKET, SO_RCVBUF, (void*)&rcv_buf, &len);
	if(state)
		error_handling("getsockopt() error");

	printf("Input buffer size: %d \n", rcv_buf);
	printf("Output buffer size: %d \n", snd_buf);
	return 0;
}

void error_handling(char *message)
{
	fputs(message, stderr);
	fputc('\n', stderr);
	exit(1);
}

 

 

 

 

 

 

set_buf.c  보내는넘

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/socket.h>
void error_handling(char *message);

int main(int argc, char *argv[])
{
	int sock;
	int snd_buf=1024*3, rcv_buf=1024%3;
	int state;
	socklen_t len;

	sock=socket(PF_INET, SOCK_STREAM, 0);
	state=setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (void*)&rcv_buf, sizeof(rcv_buf));
	if(state)
		error_handling("setsockopt() error!");

	state=setsockopt(sock, SOL_SOCKET, SO_SNDBUF, (void*)&snd_buf, sizeof(snd_buf));
	if(state)
		error_handling("setsockopt() error!");

	len=sizeof(snd_buf);
	state=getsockopt(sock, SOL_SOCKET, SO_SNDBUF, (void*)&snd_buf, &len);
	if(state)
		error_handling("getsockopt() error!");

	len=sizeof(rcv_buf);
	state=getsockopt(sock, SOL_SOCKET, SO_RCVBUF, (void*)&rcv_buf, &len);
	if(state)
		error_handling("getsockopt() error!");

	printf("Input buffer size: %d \n", rcv_buf);
	printf("Output buffer size: %d \n", snd_buf);
	return 0;
}

void error_handling(char *message)
{
	fputs(message, stderr);
	fputc('\n', stderr);
	exit(1);
}

 

reuseadr_eserver.c 이거  재사용 하는거임 그런거임 ㅇㅇ

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>

#define TRUE 1
#define FALSE 0
void error_handling(char *message);

int main(int argc, char *argv[])
{
	int serv_sock, clnt_sock;
	char message[30];
	int option, str_len;
	socklen_t optlen, clnt_adr_sz;
	struct sockaddr_in serv_adr, clnt_adr;
	if(argc!=2) {
		printf("Usage : %s <port>\n", argv[0]);
		exit(1);
	}
	
	serv_sock= socket(PF_INET, SOCK_STREAM, 0);
	if(serv_sock==-1)
		error_handling("socket() error");
	/*
	optlen=sizeof(option);
	option=TRUE;
	setsockopt(serv_sock, SOL_SOCKET, SO_REUSEADDR, (void*)&option, optlen);
	*/

	memset(&serv_adr, 0, sizeof(serv_adr));
	serv_adr.sin_family=AF_INET;
	serv_adr.sin_addr.s_addr=htonl(INADDR_ANY);
	serv_adr.sin_port=htons(atoi(argv[1]));

	if(bind(serv_sock, (struct sockaddr*)&clnt_adr, sizeof(serv_adr)))
		error_handling("bind() error");

	if(listen(serv_sock, 5)==-1)
		error_handling("listen() error");

	clnt_adr_sz=sizeof(clnt_adr);
	clnt_sock=accept(serv_sock, (struct sockaddr*)&clnt_adr,&clnt_adr_sz);

	while((str_len=read(clnt_sock,message, sizeof(message)))!= 0)
	{
		write(clnt_sock, message, str_len);
		write(1, message, str_len);
	}
	close(clnt_sock);
	close(serv_sock);
	return 0;
}

void error_handling(char *message)
{
	fputs(message, stderr);
	fputc('\n', stderr);
	exit(1);
}