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#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <errno.h>
#include <netdb.h>
#include <strings.h>
#include <stdlib.h>
#include <string.h>
#include <string>
#include <iostream>
using namespace std;
int open_socket(const char* host, size_t new_id)
{
const char* colon = index(host,':');
short unsigned int port = 39524;
hostent* he;
if (colon != NULL)
{
port = atoi(colon+1);
char hostname[colon-host+1];
strncpy(hostname, host, colon-host);
hostname[colon-host]='\0';
he = gethostbyname(hostname);
}
else
he = gethostbyname(host);
if (he == NULL)
{
cerr << "can't resolve hostname: " << host << endl;
exit(1);
}
int sd = socket(PF_INET, SOCK_STREAM, 0);
if (sd == -1)
{
cerr << "can't get socket " << endl;
exit(1);
}
sockaddr_in far_end;
far_end.sin_family = AF_INET;
far_end.sin_port = htons(port);
far_end.sin_addr = *(in_addr*)(he->h_addr);
memset(&far_end.sin_zero, '\0',8);
if (connect(sd,(sockaddr*)&far_end, sizeof(far_end)) == -1)
{
cerr << "can't connect to: " << host << ':' << port << endl;
exit(1);
}
if (write(sd, &new_id, sizeof(new_id)) < (int)sizeof(new_id))
cerr << "write failed!" << endl;
return sd;
}
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