에코 서버, 에코 클라이언트 소스 입니다

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2010년 10월 29일 4:38 오후 #13131

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@ssamgu1

<에코 서버>

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

#define BUF_SIZE 1024
void error_handling(char *message);

int main(int argc, char *argv[])
{
   int serv_sock, clnt_sock;
   char message[BUF_SIZE];
   int str_len, i;

   struct sockaddr_in serv_adr;
   struct sockaddr_in clnt_adr;
   socklen_t clnt_adr_sz;

   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");

   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");

   clnt_adr_sz=sizeof(clnt_adr);

   for(i=0; i<5; i++)
   {
       clnt_sock=accept(serv_sock, (struct sockaddr*)&clnt_adr, &clnt_adr_sz);
       if(clnt_sock==-1)
           error_handling("accept() error");
       else
           printf("Connected client %d \n", i+1);

       while((str_len=read(clnt_sock, message, BUF_SIZE))!=0)
           write(clnt_sock, message, str_len);

       close(clnt_sock);
   }

   close(serv_sock);
   return 0;
}

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

--------------------------------------------------------------------------------------------------------------------------------
<에코 클라이언트>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include <arpa/inet.h>

#include <sys/socket.h>

#define BUF_SIZE 1024

void error_handling(char *message);

int main(int argc, char *argv[])

{

    int sock;

    char message[BUF_SIZE];

    int str_len;

    struct sockaddr_in serv_adr;

    if(argc!=3) {

        printf("Usage : %s <IP> <port>\n", argv[0]);

        exit(1);

    }


    sock=socket(PF_INET, SOCK_STREAM, 0);

    if(sock==-1)

        error_handling("socket() error");


    memset(&serv_adr, 0, sizeof(serv_adr));

    serv_adr.sin_family=AF_INET;

    serv_adr.sin_addr.s_addr=inet_addr(argv[1]);

    serv_adr.sin_port=htons(atoi(argv[2]));


    if(connect(sock, (struct sockaddr*)&serv_adr, sizeof(serv_adr))==-1)

        error_handling("connect() error!");

    else

        puts("Connected...........");


    while(1)

    {

        fputs("Input message(Q to quit): ", stdout);

        fgets(message, BUF_SIZE, stdin);


        if(!strcmp(message,"q\n") || !strcmp(message,"Q\n"))

            break;

        write(sock, message, strlen(message));

        str_len=read(sock, message, BUF_SIZE-1);

        message[str_len]=0;

        printf("Message from server: %s", message);

    }


    close(sock);

    return 0;

}

void error_handling(char *message)

{

    fputs(message, stderr);

    fputc('\n', stderr);

    exit(1);

}

소스가 문젠인거가요??ㅠ.ㅠ

안뇽하세요~잘부탁드립니다.

대학생 입니다.ㅋㅋㅋ

답변은 로그인 후 가능합니다.

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