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);
}'[ 충남인력개발원 ] (2019) > ┗TCP&IP' 카테고리의 다른 글
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