클라이언트로 부터 char 300정도 받으면 세크먼트 에러가......

Segmentation fault (core dumped) 가 생기네요....

#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <signal.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <netinet/in.h>
#include <string.h>
#include <signal.h>
#define MAXLINE 1024
#define MAX_SOCK 64

char rline[MAXLINE];
char *escapechar="exit";
int getmax(int);
void removeClient(int);
int maxfdp1;
int num_com=0;
int client_s[MAX_SOCK];
int command_nflag,command_nsize,option_nflag,option_nsize;
char command[256],option[256];
int main(int argc,char *argv[])
{
        int i,j,n;
        int s,client_fd,clilen;
        fd_set read_fds;
        struct sockaddr_in client_addr,server_addr;

        signal(SIGHUP, SIG_IGN);
        signal(SIGTERM, SIG_IGN);

        if(argc !=2)
        {
                printf("%s port\n",argv[0]);
                exit(0);
        }

        if((s=socket(PF_INET,SOCK_STREAM,0)) <0)
        {
                printf("Server: Can't open stream socket.");
                exit(0);
        }

        //setting server_addr
        bzero((char *)&server_addr,sizeof(server_addr));
        server_addr.sin_family=AF_INET;
        server_addr.sin_addr.s_addr=htonl(INADDR_ANY);
        server_addr.sin_port=htons(atoi(argv[1]));

        if(bind(s,(struct sockaddr *)&server_addr,sizeof(server_addr))<0)
        {
                printf("Server:Can't bind local address.\n");
                exit(0);
        }

        listen(s,5);
        maxfdp1=s+1;

        while(1)
        {
                FD_ZERO(&read_fds);
                FD_SET(s,&read_fds);
                for(i=0; i<num_com;i++)
                        FD_SET(client_s[i],&read_fds);
                maxfdp1=getmax(s)+1;
                if(select(maxfdp1,&read_fds,(fd_set *)0,(fd_set *)0,(struct timeval *)0) <0)
                {
                        printf("select error <= 0 \n");
                        exit(0);
                }

                if(FD_ISSET(s,&read_fds))
                {
                        clilen=sizeof(client_addr);
                        client_fd=accept(s,(struct sockaddr *)&client_addr,&clilen);
                        if(client_fd == -1)
                        {
                                printf("accept error\n");
                                exit(0);
                        }

                        client_s[num_com]=client_fd;
                        num_com++;
                        printf("%d client_commputer\n",num_com);
                }

                for(i=0;i<num_com;i++)
                {
                        if(FD_ISSET(client_s[i],&read_fds))
                        {
                                if((n=recv(client_s[i],rline,MAXLINE,0)) <= 0)
                                {
                                        removeClient(i);
                                        continue;
                                }

                                if(strstr(rline,escapechar)!=NULL)
                                {
                                        removeClient(i);
                                        continue;
                                }

                                rline[n]='\0';

                                for(j=0;j<num_com;j++)
                                send(client_s[j],rline,n,0);

                                memcpy(&command_nflag,rline,4);
                                memcpy(&command_nsize,rline+4,4);
                                command[command_nsize]='\0';
                                memcpy(command,rline+8,command_nsize);
                                memcpy(&option_nflag,rline+sizeof(int)*2 + command_nsize,4);
                                memcpy(&option_nsize,rline+sizeof(int)*3 + command_nsize,4);
                }

                for(i=0;i<num_com;i++)
                {
                        if(FD_ISSET(client_s[i],&read_fds))
                        {
                                if((n=recv(client_s[i],rline,MAXLINE,0)) <= 0)
                                {
                                        removeClient(i);
                                        continue;
                                }

                                if(strstr(rline,escapechar)!=NULL)
                                {
                                        removeClient(i);
                                        continue;
                                }

                                rline[n]='\0';

                                for(j=0;j<num_com;j++)
                                send(client_s[j],rline,n,0);

                                
                        }
                }      
        }
}



void removeClient(int i)
{
        close(client_s[i]);
        if( i !=(num_com -1))
        {
                client_s[i]=client_s[num_com -1];
        }
        num_com--;
        printf("total computer : %d\n",num_com);
}

int getmax(int k)
{
        int max=k;
        int r;
        for(r=0;r<num_com;r++)
        {
                if(client_s[r] >max)
                        max=client_s[r];
        }
        return max;
}