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getpeername.c
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getpeername.c
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/*
* Copyright (C) 2013 - David Goulet <dgoulet@ev0ke.net>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License, version 2 only, as
* published by the Free Software Foundation.
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <arpa/inet.h>
#include <assert.h>
#include <common/log.h>
#include "torsocks.h"
/* getpeername(2) */
TSOCKS_LIBC_DECL(getpeername, LIBC_GETPEERNAME_RET_TYPE,
LIBC_GETPEERNAME_SIG)
/*
* Torsocks call for getpeername(2).
*/
LIBC_GETPEERNAME_RET_TYPE tsocks_getpeername(LIBC_GETPEERNAME_SIG)
{
int ret = 0;
struct connection *conn;
DBG("[getpeername] Requesting address on socket %d", __sockfd);
connection_registry_lock();
conn = connection_find(__sockfd);
if (!conn) {
errno = ENOTCONN;
ret = -1;
goto end;
}
errno = 0;
end:
connection_registry_unlock();
return ret;
}
/*
* Libc hijacked symbol getpeername(2).
*/
LIBC_GETPEERNAME_DECL
{
int ret;
tsocks_libc_getpeername = tsocks_find_libc_symbol(LIBC_GETPEERNAME_NAME_STR,
TSOCKS_SYM_EXIT_NOT_FOUND);
ret = tsocks_libc_getpeername(LIBC_GETPEERNAME_ARGS);
if (ret < 0) {
/* errno is populated by the previous call at this point. */
return ret;
}
return tsocks_getpeername(LIBC_GETPEERNAME_ARGS);
}