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readwrite.c
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/*
* Part of Very Secure FTPd
* Licence: GPL v2
* Author: Chris Evans
* readwrite.c
*
* Routines to encapsulate the underlying read / write mechanism (OpenSSL vs.
* plain read()/write()).
*/
#include "readwrite.h"
#include "session.h"
#include "netstr.h"
#include "ssl.h"
#include "privsock.h"
#include "defs.h"
#include "sysutil.h"
static int plain_peek_adapter(_Ptr<struct vsf_session> p_sess,
_Array_ptr<char> p_buf : count(len),
unsigned int len);
static int plain_read_adapter(_Ptr<struct vsf_session> p_sess,
_Array_ptr<char> p_buf : count(len),
unsigned int len);
static int ssl_peek_adapter(_Ptr<struct vsf_session> p_sess,
_Array_ptr<char> p_buf : count(len),
unsigned int len);
static int ssl_read_adapter(_Ptr<struct vsf_session> p_sess,
_Array_ptr<char> p_buf : count(len),
unsigned int len);
int
ftp_write_str(_Ptr<const struct vsf_session> p_sess, _Ptr<const struct mystr> p_str,
enum EVSFRWTarget target)
{
if (target == kVSFRWData)
{
if (p_sess->data_use_ssl && p_sess->ssl_slave_active)
{
int ret = -1;
int written;
priv_sock_send_cmd(p_sess->ssl_consumer_fd, PRIV_SOCK_DO_SSL_WRITE);
priv_sock_send_str(p_sess->ssl_consumer_fd, p_str);
written = priv_sock_get_int(p_sess->ssl_consumer_fd);
if (written > 0 && written == (int) str_getlen(p_str))
{
ret = 0;
}
return ret;
}
else if (p_sess->data_use_ssl)
{
return ssl_write_str(p_sess->p_data_ssl, p_str);
}
else
{
return str_netfd_write(p_str, p_sess->data_fd);
}
}
else
{
if (p_sess->control_use_ssl && p_sess->ssl_slave_active)
{
priv_sock_send_cmd(p_sess->ssl_consumer_fd, PRIV_SOCK_WRITE_USER_RESP);
priv_sock_send_str(p_sess->ssl_consumer_fd, p_str);
return priv_sock_get_int(p_sess->ssl_consumer_fd);
}
else if (p_sess->control_use_ssl)
{
return ssl_write_str(p_sess->p_control_ssl, p_str);
}
else
{
return str_netfd_write(p_str, VSFTP_COMMAND_FD);
}
}
}
int
ftp_read_data(_Ptr<struct vsf_session> p_sess,
_Array_ptr<char> p_buf : count(len), unsigned int len)
{
if (p_sess->data_use_ssl && p_sess->ssl_slave_active)
{
int ret;
priv_sock_send_cmd(p_sess->ssl_consumer_fd, PRIV_SOCK_DO_SSL_READ);
priv_sock_send_int(p_sess->ssl_consumer_fd, len);
ret = priv_sock_get_int(p_sess->ssl_consumer_fd);
priv_sock_recv_buf(p_sess->ssl_consumer_fd, p_buf, len);
/* Need to do this here too because it is useless in the slave process. */
vsf_sysutil_check_pending_actions(kVSFSysUtilIO, ret, p_sess->data_fd);
return ret;
}
else if (p_sess->data_use_ssl)
{
return ssl_read(p_sess, p_sess->p_data_ssl, p_buf, len);
}
else
{
return vsf_sysutil_read(p_sess->data_fd, p_buf, len);
}
}
int
ftp_write_data(_Ptr<const struct vsf_session> p_sess,
_Array_ptr<const char> p_buf : count(len), unsigned int len)
{
if (p_sess->data_use_ssl && p_sess->ssl_slave_active)
{
int ret;
priv_sock_send_cmd(p_sess->ssl_consumer_fd, PRIV_SOCK_DO_SSL_WRITE);
priv_sock_send_buf(p_sess->ssl_consumer_fd, p_buf, len);
ret = priv_sock_get_int(p_sess->ssl_consumer_fd);
/* Need to do this here too because it is useless in the slave process. */
vsf_sysutil_check_pending_actions(kVSFSysUtilIO, ret, p_sess->data_fd);
return ret;
}
else if (p_sess->data_use_ssl)
{
return ssl_write(p_sess->p_data_ssl, p_buf, len);
}
else
{
return vsf_sysutil_write_loop(p_sess->data_fd, p_buf, len);
}
}
int
ftp_getline(_Ptr<struct vsf_session> p_sess, _Ptr<struct mystr> p_str, _Array_ptr<char> p_buf : count(VSFTP_MAX_COMMAND_LINE))
{
if (p_sess->control_use_ssl && p_sess->ssl_slave_active)
{
int ret;
priv_sock_send_cmd(p_sess->ssl_consumer_fd, PRIV_SOCK_GET_USER_CMD);
ret = priv_sock_get_int(p_sess->ssl_consumer_fd);
if (ret >= 0)
{
priv_sock_get_str(p_sess->ssl_consumer_fd, p_str);
}
return ret;
}
else
{
str_netfd_read_t p_peek = plain_peek_adapter;
str_netfd_read_t p_read = plain_read_adapter;
if (p_sess->control_use_ssl)
{
p_peek = ssl_peek_adapter;
p_read = ssl_read_adapter;
}
return str_netfd_alloc(p_sess,
p_str,
'\n',
p_buf,
VSFTP_MAX_COMMAND_LINE,
p_peek,
p_read);
}
}
static int
plain_peek_adapter(_Ptr<struct vsf_session> p_sess,
_Array_ptr<char> p_buf : count(len), unsigned int len)
{
(void) p_sess;
return vsf_sysutil_recv_peek(VSFTP_COMMAND_FD, p_buf, len);
}
static int
plain_read_adapter(_Ptr<struct vsf_session> p_sess,
_Array_ptr<char> p_buf : count(len), unsigned int len)
{
(void) p_sess;
return vsf_sysutil_read_loop(VSFTP_COMMAND_FD, p_buf, len);
}
static int
ssl_peek_adapter(_Ptr<struct vsf_session> p_sess,
_Array_ptr<char> p_buf : count(len), unsigned int len)
{
return ssl_peek(p_sess, p_sess->p_control_ssl, p_buf, len);
}
static int
ssl_read_adapter(_Ptr<struct vsf_session> p_sess,
_Array_ptr<char> p_buf : count(len), unsigned int len)
{
return ssl_read(p_sess, p_sess->p_control_ssl, p_buf, len);
}