센서
0~1023 |
server --------------- client
| 1 0....* |
| |
| stdoot
DB
양방향 서버
클라이언트 소켓을
하프 클로우스 로 상대방이 끊었을떄 나옴
fgets() 엔터키ㄹ떄까지 기다림
이제 서버를 만들고 받을 준비를 해보자
#include <stdio.h>
#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <string.h>
#define BUF_SIZE 100
#define MAX_CLNT 256
void * handle_clnt(void * arg);
void send_msg(char * msg, int len);
void error_handling(char * msg);
int clnt_cnt=0;
int clnt_socks[MAX_CLNT];
pthread_mutex_t mutx;
int main(int argc, char *argv[])
{
int serv_sock, clnt_sock;
struct sockaddr_in serv_adr, clnt_adr;
int clnt_adr_sz;
pthread_t t_id;
if(argc!=2) {
printf("Usage : %s <port>\n", argv[0]);
exit(1);
}
pthread_mutex_init(&mutx, NULL);
serv_sock=socket(PF_INET, SOCK_STREAM, 0);
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*) &serv_adr, sizeof(serv_adr))==-1)
error_handling("bind() error");
if(listen(serv_sock, 5)==-1)
error_handling("listen() error");
while(1)
{
clnt_adr_sz=sizeof(clnt_adr);
clnt_sock=accept(serv_sock, (struct sockaddr*)&clnt_adr,&clnt_adr_sz);
pthread_mutex_lock(&mutx);
clnt_socks[clnt_cnt++]=clnt_sock;
pthread_mutex_unlock(&mutx);
pthread_create(&t_id, NULL, handle_clnt, (void*)&clnt_sock);
pthread_detach(t_id);
printf("Connected client IP: %s \n", inet_ntoa(clnt_adr.sin_addr));
}
close(serv_sock);
return 0;
}
void * handle_clnt(void * arg)
{
int clnt_sock=*((int*)arg);
int str_len=0, i;
char msg[BUF_SIZE];
while((str_len=read(clnt_sock, msg, sizeof(msg)))!=0)
send_msg(msg, str_len);
pthread_mutex_lock(&mutx);
for(i=0;i<clnt_cnt; i++)
{
if(clnt_sock==clnt_socks[i])
{
while(i++<clnt_cnt-1)
clnt_socks[i]=clnt_socks[i+1];
break;
}
}
clnt_cnt--;
pthread_mutex_unlock(&mutx);
close(clnt_sock);
return NULL;
}
void send_msg(char * msg, int len)
{
int i;
pthread_mutex_lock(&mutx);
for (i=0; i<clnt_cnt; i++)
write(clnt_socks[i], msg, len);
pthread_mutex_unlock(&mutx);
}
void error_handling(char * message)
{
fputs(message, stderr);
fputc('\n', stderr);
exit(1);
}그리고
접속할 유저들을 모집해보자
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <pthread.h>
#define BUF_SIZE 100
#define NAME_SIZE 20
void * send_msg(void * arg);
void * recv_msg(void * arg);
void error_handling(char * msg);
char name[NAME_SIZE]="[DEFAULT]";
char msg[BUF_SIZE];
int main(int argc, char *argv[])
{
int sock;
struct sockaddr_in serv_addr;
pthread_t snd_thread, rcv_thread;
void * thread_return;
if(argc!=4) {
printf("Usage : %s <IP> <port> <name>\n", argv[0]);
exit(1);
}
sprintf(name, "[%s]",argv[3]);
sock=socket(PF_INET, SOCK_STREAM, 0);
memset(&serv_addr, 0, sizeof(serv_addr));
serv_addr.sin_family=AF_INET;
serv_addr.sin_addr.s_addr=inet_addr(argv[1]);
serv_addr.sin_port=htons(atoi(argv[2]));
if(connect(sock, (struct sockaddr*)&serv_addr, sizeof(serv_addr))==-1)
error_handling("connect() error");
pthread_create(&snd_thread, NULL, send_msg, (void*)&sock);
pthread_create(&rcv_thread, NULL, recv_msg, (void*)&sock);
pthread_join(snd_thread, &thread_return);
pthread_join(rcv_thread, &thread_return);
close(sock);
return 0;
}
void * send_msg(void * arg)
{
int sock=*((int*)arg);
char name_msg[NAME_SIZE+BUF_SIZE];
while(1)
{
fgets(msg, BUF_SIZE, stdin);
if(!strcmp(msg,"q\n")||!strcmp(msg,"Q\n"))
{
close(sock);
exit(0);
}
sprintf(name_msg,"%s %s", name, msg);
write(sock, name_msg, strlen(name_msg));
}
return NULL;
}
void * recv_msg(void * arg)
{
int sock= *((int*)arg);
char name_msg[NAME_SIZE+BUF_SIZE];
int str_len;
while(1)
{
str_len=read(sock, name_msg, NAME_SIZE+BUF_SIZE-1);
if(str_len==-1)
return (void*)-1;
name_msg[str_len]=0;
fputs(name_msg, stdout);
}
return NULL;
}
void error_handling(char * message)
{
fputs("message", stderr);
fputc('\n', stderr);
exit(1);
}
되긴 됫는데 복잡하게 체팅이 보여 내가보낸것도 나한테오고 ,,
수정좀 해야겟움
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Or71nH
