TCP Echo Server Using thread command line not showing - c++

Question

In my project wants when client side write like LIST the server side will directory list documents and after when I write like GET filename.txt but in the server side not shows me any thing ı think is stop how can I solve this problem my project describer in photo enter image description here
enter image description here
source code is
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <resolv.h>
#include <arpa/inet.h>
#include <pthread.h>
#include <stdbool.h>
#include <dirent.h>
/* Definations */
#define DEFAULT_BUFLEN 1024
#define PORT 1888
void PANIC(char* msg);
#define PANIC(msg) { perror(msg); exit(-1); }
bool StartsWith(const char *a, const char *b)
{
if(strncmp(a, b, strlen(b)) == 0) return 1;
return 0;
}
void* Child(void* arg)
{ char line[DEFAULT_BUFLEN];
int bytes_read;
int client = *(int *)arg;
send(client,"Welcome to Vepa Server\n",strlen("Welcome to Vepa Server\n"),0);
do
{
bytes_read = recv(client, line, sizeof(line), 0);
if (bytes_read > 0) {
printf("%s",line);
// list command in here
if (strcmp(line,"LIST\n") ==0)
{
while(1)
{
DIR *d;
struct dirent *dir;
d = opendir(".");
if (d) {
while ((dir = readdir(d)) != NULL) {
send(client,dir->d_name,strlen(dir->d_name),0);
send(client,"\n",strlen("\n"),0);
}
closedir(d);
}
return(0);
}
}
if (StartsWith(line,"GET") == 1)
{
printf(line);
}
if ( (bytes_read=send(client, line, bytes_read, 0)) < 0 ) {
printf("Send failed\n");
break;
}
} else if (bytes_read == 0 ) {
printf("Connection closed by client\n");
break;
} else {
printf("Connection has problem\n");
break;
}
} while (bytes_read > 0);
close(client);
return arg;
}
int main(int argc, char *argv[])
{
int sd,opt,optval;
struct sockaddr_in addr;
unsigned short port=0;
while ((opt = getopt(argc, argv, "p:")) != -1) {
switch (opt) {
case 'p':
port=atoi(optarg);
break;
}
}
if ( (sd = socket(PF_INET, SOCK_STREAM, 0)) < 0 )
PANIC("Socket");
addr.sin_family = AF_INET;
if ( port > 0 )
addr.sin_port = htons(port);
else
addr.sin_port = htons(PORT);
addr.sin_addr.s_addr = INADDR_ANY;
// set SO_REUSEADDR on a socket to true (1):
optval = 1;
setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof optval);
if ( bind(sd, (struct sockaddr*)&addr, sizeof(addr)) != 0 )
PANIC("Bind");
if ( listen(sd, SOMAXCONN) != 0 )
PANIC("Listen");
printf("System ready on port %d\n",ntohs(addr.sin_port));
while (1)
{
int client, addr_size = sizeof(addr);
pthread_t child;
client = accept(sd, (struct sockaddr*)&addr, &addr_size);
printf("Connected: %s:%d\n", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
if ( pthread_create(&child, NULL, Child, &client) != 0 )
perror("Thread creation");
else
pthread_detach(child); /* disassociate from parent */
}
return 0;
}