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/* HexChat
* Copyright (C) 1998-2010 Peter Zelezny.
* Copyright (C) 2009-2013 Berke Viktor.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
/* simple identd server for HexChat under Win32 */
#include "inet.h"
#include "hexchat.h"
#include "hexchatc.h"
#include "text.h"
static int identd_is_running = FALSE;
#ifdef USE_IPV6
static int identd_ipv6_is_running = FALSE;
#endif
static int
identd (char *username)
{
int sok, read_sok, len;
char *p;
char buf[256];
char outbuf[256];
char ipbuf[INET_ADDRSTRLEN];
struct sockaddr_in addr;
sok = socket (AF_INET, SOCK_STREAM, 0);
if (sok == INVALID_SOCKET)
{
free (username);
return 0;
}
len = 1;
setsockopt (sok, SOL_SOCKET, SO_REUSEADDR, (char *) &len, sizeof (len));
memset (&addr, 0, sizeof (addr));
addr.sin_family = AF_INET;
addr.sin_port = htons (113);
if (bind (sok, (struct sockaddr *) &addr, sizeof (addr)) == SOCKET_ERROR)
{
closesocket (sok);
free (username);
return 0;
}
if (listen (sok, 1) == SOCKET_ERROR)
{
closesocket (sok);
free (username);
return 0;
}
len = sizeof (addr);
read_sok = accept (sok, (struct sockaddr *) &addr, &len);
closesocket (sok);
if (read_sok == INVALID_SOCKET)
{
free (username);
return 0;
}
identd_is_running = FALSE;
#if 0 /* causes random crashes, probably due to CreateThread */
EMIT_SIGNAL (XP_TE_IDENTD, current_sess, inet_ntoa (addr.sin_addr), username, NULL, NULL, 0);
#endif
inet_ntop (AF_INET, &addr.sin_addr, ipbuf, sizeof (ipbuf));
snprintf (outbuf, sizeof (outbuf), "*\tServicing ident request from %s as %s\n", ipbuf, username);
PrintText (current_sess, outbuf);
recv (read_sok, buf, sizeof (buf) - 1, 0);
buf[sizeof (buf) - 1] = 0; /* ensure null termination */
p = strchr (buf, ',');
if (p)
{
snprintf (outbuf, sizeof (outbuf) - 1, "%d, %d : USERID : UNIX : %s\r\n",
atoi (buf), atoi (p + 1), username);
outbuf[sizeof (outbuf) - 1] = 0; /* ensure null termination */
send (read_sok, outbuf, strlen (outbuf), 0);
}
sleep (1);
closesocket (read_sok);
free (username);
return 0;
}
#ifdef USE_IPV6
static int
identd_ipv6 (char *username)
{
int sok, read_sok, len;
char *p;
char buf[256];
char outbuf[256];
char ipbuf[INET6_ADDRSTRLEN];
struct sockaddr_in6 addr;
sok = socket (AF_INET6, SOCK_STREAM, 0);
if (sok == INVALID_SOCKET)
{
free (username);
return 0;
}
len = 1;
setsockopt (sok, SOL_SOCKET, SO_REUSEADDR, (char *) &len, sizeof (len));
memset (&addr, 0, sizeof (addr));
addr.sin6_family = AF_INET6;
addr.sin6_port = htons (113);
if (bind (sok, (struct sockaddr *) &addr, sizeof (addr)) == SOCKET_ERROR)
{
closesocket (sok);
free (username);
return 0;
}
if (listen (sok, 1) == SOCKET_ERROR)
{
closesocket (sok);
free (username);
return 0;
}
len = sizeof (addr);
read_sok = accept (sok, (struct sockaddr *) &addr, &len);
closesocket (sok);
if (read_sok == INVALID_SOCKET)
{
free (username);
return 0;
}
identd_ipv6_is_running = FALSE;
inet_ntop (AF_INET6, &addr.sin6_addr, ipbuf, sizeof (ipbuf));
snprintf (outbuf, sizeof (outbuf), "*\tServicing ident request from %s as %s\n", ipbuf, username);
PrintText (current_sess, outbuf);
recv (read_sok, buf, sizeof (buf) - 1, 0);
buf[sizeof (buf) - 1] = 0; /* ensure null termination */
p = strchr (buf, ',');
if (p)
{
snprintf (outbuf, sizeof (outbuf) - 1, "%d, %d : USERID : UNIX : %s\r\n", atoi (buf), atoi (p + 1), username);
outbuf[sizeof (outbuf) - 1] = 0; /* ensure null termination */
send (read_sok, outbuf, strlen (outbuf), 0);
}
sleep (1);
closesocket (read_sok);
free (username);
return 0;
}
#endif
void
identd_start (char *username)
{
DWORD tid;
#ifdef USE_IPV6
DWORD tidv6;
if (identd_ipv6_is_running == FALSE)
{
identd_ipv6_is_running = TRUE;
CloseHandle (CreateThread (NULL, 0, (LPTHREAD_START_ROUTINE) identd_ipv6,
strdup (username), 0, &tidv6));
}
#endif
if (identd_is_running == FALSE)
{
identd_is_running = TRUE;
CloseHandle (CreateThread (NULL, 0, (LPTHREAD_START_ROUTINE) identd,
strdup (username), 0, &tid));
}
}
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