static PyObject *
channel_shell(SSH2_ChannelObj *self)
{
int ret;
Py_BEGIN_ALLOW_THREADS
ret = libssh2_channel_process_startup(self->channel, "shell", 5, NULL, 0);
Py_END_ALLOW_THREADS
CHECK_RETURN_CODE(ret, self->session)
Py_RETURN_NONE;
}
static PyObject *
channel_subsystem(SSH2_ChannelObj *self, PyObject *args)
{
char *subsys;
Py_ssize_t subsys_len;
int ret;
if (!PyArg_ParseTuple(args, "s#:subsystem", &subsys, &subsys_len))
return NULL;
Py_BEGIN_ALLOW_THREADS
ret = libssh2_channel_process_startup(self->channel, "subsystem", 9, subsys, subsys_len);
Py_END_ALLOW_THREADS
CHECK_RETURN_CODE(ret, self->session)
Py_RETURN_NONE;
}
/* Can not be called just 'Channel.exec' like in the C API,
* because of 'exec' is a reserved keyword in Python 2. */
static PyObject *
channel_execute(SSH2_ChannelObj *self, PyObject *args)
{
char *cmd;
Py_ssize_t cmd_len;
int ret;
if (!PyArg_ParseTuple(args, "s#:execute", &cmd, &cmd_len))
return NULL;
Py_BEGIN_ALLOW_THREADS
ret = libssh2_channel_process_startup(self->channel, "exec", 4, cmd, cmd_len);
Py_END_ALLOW_THREADS
CHECK_RETURN_CODE(ret, self->session)
Py_RETURN_NONE;
}
/* {{{ libssh2_scp_send_ex
* Send a file using SCP
*
* NOTE: Will block in a busy loop on error. This has to be done,
* otherwise the blocking error code would erase the true
* cause of the error.
*/
LIBSSH2_API LIBSSH2_CHANNEL *
libssh2_scp_send_ex(LIBSSH2_SESSION * session, const char *path, int mode,
size_t size, long mtime, long atime)
{
int path_len = strlen(path);
unsigned const char *base;
int rc;
if (session->scpSend_state == libssh2_NB_state_idle) {
session->scpSend_command_len = path_len + sizeof("scp -t ");
if (mtime || atime) {
session->scpSend_command_len++;
}
session->scpSend_command =
LIBSSH2_ALLOC(session, session->scpSend_command_len);
if (!session->scpSend_command) {
libssh2_error(session, LIBSSH2_ERROR_ALLOC,
"Unable to allocate a command buffer for scp session",
0);
return NULL;
}
if (mtime || atime) {
memcpy(session->scpSend_command, "scp -pt ",
sizeof("scp -pt ") - 1);
memcpy(session->scpSend_command + sizeof("scp -pt ") - 1, path,
path_len);
} else {
memcpy(session->scpSend_command, "scp -t ", sizeof("scp -t ") - 1);
memcpy(session->scpSend_command + sizeof("scp -t ") - 1, path,
path_len);
}
session->scpSend_command[session->scpSend_command_len - 1] = '\0';
_libssh2_debug(session, LIBSSH2_DBG_SCP,
"Opening channel for SCP send");
/* Allocate a channel */
session->scpSend_state = libssh2_NB_state_created;
}
if (session->scpSend_state == libssh2_NB_state_created) {
session->scpSend_channel =
libssh2_channel_open_ex(session, "session", sizeof("session") - 1,
LIBSSH2_CHANNEL_WINDOW_DEFAULT,
LIBSSH2_CHANNEL_PACKET_DEFAULT, NULL, 0);
if (!session->scpSend_channel) {
if (libssh2_session_last_errno(session) != LIBSSH2_ERROR_EAGAIN) {
/* previous call set libssh2_session_last_error(), pass it through */
LIBSSH2_FREE(session, session->scpSend_command);
session->scpSend_command = NULL;
session->scpSend_state = libssh2_NB_state_idle;
return NULL;
} else if (libssh2_session_last_errno(session) ==
LIBSSH2_ERROR_EAGAIN) {
libssh2_error(session, LIBSSH2_ERROR_EAGAIN,
"Would block starting up channel", 0);
return NULL;
}
}
session->scpSend_state = libssh2_NB_state_sent;
}
if (session->scpSend_state == libssh2_NB_state_sent) {
/* Request SCP for the desired file */
rc = libssh2_channel_process_startup(session->scpSend_channel, "exec",
sizeof("exec") - 1,
(char *) session->scpSend_command,
session->scpSend_command_len);
if (rc == PACKET_EAGAIN) {
libssh2_error(session, LIBSSH2_ERROR_EAGAIN,
"Would block requesting SCP startup", 0);
return NULL;
} else if (rc) {
/* previous call set libssh2_session_last_error(), pass it through */
LIBSSH2_FREE(session, session->scpSend_command);
session->scpSend_command = NULL;
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Unknown error while getting error string", 0);
goto scp_send_error;
}
LIBSSH2_FREE(session, session->scpSend_command);
session->scpSend_command = NULL;
session->scpSend_state = libssh2_NB_state_sent1;
}
if (session->scpSend_state == libssh2_NB_state_sent1) {
/* Wait for ACK */
rc = libssh2_channel_read_ex(session->scpSend_channel, 0,
(char *) session->scpSend_response, 1);
if (rc == PACKET_EAGAIN) {
libssh2_error(session, LIBSSH2_ERROR_EAGAIN,
"Would block waiting for response from remote", 0);
return NULL;
} else if ((rc <= 0) || (session->scpSend_response[0] != 0)) {
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid ACK response from remote", 0);
goto scp_send_error;
}
if (mtime || atime) {
/* Send mtime and atime to be used for file */
session->scpSend_response_len =
snprintf((char *) session->scpSend_response,
LIBSSH2_SCP_RESPONSE_BUFLEN, "T%ld 0 %ld 0\n", mtime,
atime);
_libssh2_debug(session, LIBSSH2_DBG_SCP, "Sent %s",
session->scpSend_response);
}
session->scpSend_state = libssh2_NB_state_sent2;
}
/* Send mtime and atime to be used for file */
if (mtime || atime) {
if (session->scpSend_state == libssh2_NB_state_sent2) {
rc = libssh2_channel_write_ex(session->scpSend_channel, 0,
(char *) session->scpSend_response,
session->scpSend_response_len);
if (rc == PACKET_EAGAIN) {
libssh2_error(session, LIBSSH2_ERROR_EAGAIN,
"Would block sending time data for SCP file", 0);
return NULL;
} else if (rc != session->scpSend_response_len) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_SEND,
"Unable to send time data for SCP file", 0);
goto scp_send_error;
}
session->scpSend_state = libssh2_NB_state_sent3;
}
if (session->scpSend_state == libssh2_NB_state_sent3) {
/* Wait for ACK */
rc = libssh2_channel_read_ex(session->scpSend_channel, 0,
(char *) session->scpSend_response,
1);
if (rc == PACKET_EAGAIN) {
libssh2_error(session, LIBSSH2_ERROR_EAGAIN,
"Would block waiting for response", 0);
return NULL;
} else if ((rc <= 0) || (session->scpSend_response[0] != 0)) {
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid ACK response from remote", 0);
goto scp_send_error;
}
session->scpSend_state = libssh2_NB_state_sent4;
}
} else {
if (session->scpSend_state == libssh2_NB_state_sent2) {
session->scpSend_state = libssh2_NB_state_sent4;
}
}
if (session->scpSend_state == libssh2_NB_state_sent4) {
/* Send mode, size, and basename */
base = (unsigned char *) strrchr(path, '/');
if (base) {
base++;
} else {
base = (unsigned char *) path;
}
session->scpSend_response_len =
snprintf((char *) session->scpSend_response,
LIBSSH2_SCP_RESPONSE_BUFLEN, "C0%o %lu %s\n", mode,
(unsigned long) size, base);
_libssh2_debug(session, LIBSSH2_DBG_SCP, "Sent %s",
session->scpSend_response);
session->scpSend_state = libssh2_NB_state_sent5;
}
if (session->scpSend_state == libssh2_NB_state_sent5) {
rc = libssh2_channel_write_ex(session->scpSend_channel, 0,
(char *) session->scpSend_response,
session->scpSend_response_len);
if (rc == PACKET_EAGAIN) {
libssh2_error(session, LIBSSH2_ERROR_EAGAIN,
"Would block send core file data for SCP file", 0);
return NULL;
} else if (rc != session->scpSend_response_len) {
libssh2_error(session, LIBSSH2_ERROR_SOCKET_SEND,
"Unable to send core file data for SCP file", 0);
goto scp_send_error;
}
session->scpSend_state = libssh2_NB_state_sent6;
}
if (session->scpSend_state == libssh2_NB_state_sent6) {
/* Wait for ACK */
rc = libssh2_channel_read_ex(session->scpSend_channel, 0,
(char *) session->scpSend_response, 1);
if (rc == PACKET_EAGAIN) {
libssh2_error(session, LIBSSH2_ERROR_EAGAIN,
"Would block waiting for response", 0);
return NULL;
} else if (rc <= 0) {
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid ACK response from remote", 0);
goto scp_send_error;
} else if (session->scpSend_response[0] != 0) {
/*
* Set this as the default error for here, if
* we are successful it will be replaced
*/
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid ACK response from remote", 0);
session->scpSend_err_len =
libssh2_channel_packet_data_len(session->scpSend_channel, 0);
session->scpSend_err_msg =
LIBSSH2_ALLOC(session, session->scpSend_err_len + 1);
if (!session->scpSend_err_msg) {
goto scp_send_error;
}
memset(session->scpSend_err_msg, 0, session->scpSend_err_len + 1);
/* Read the remote error message */
rc = libssh2_channel_read_ex(session->scpSend_channel, 0,
session->scpSend_err_msg,
session->scpSend_err_len);
if (rc <= 0) {
/*
* Since we have alread started reading this packet, it is
* already in the systems so it can't return PACKET_EAGAIN
*/
LIBSSH2_FREE(session, session->scpSend_err_msg);
session->scpSend_err_msg = NULL;
goto scp_send_error;
}
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
session->scpSend_err_msg, 1);
session->scpSend_err_msg = NULL;
goto scp_send_error;
}
}
session->scpSend_state = libssh2_NB_state_idle;
return session->scpSend_channel;
scp_send_error:
while (libssh2_channel_free(session->scpSend_channel) == PACKET_EAGAIN);
session->scpSend_channel = NULL;
session->scpSend_state = libssh2_NB_state_idle;
return NULL;
}
/* {{{ libssh2_scp_recv
* Open a channel and request a remote file via SCP
*
* NOTE: Will block in a busy loop on error. This has to be done,
* otherwise the blocking error code would erase the true
* cause of the error.
*/
LIBSSH2_API LIBSSH2_CHANNEL *
libssh2_scp_recv(LIBSSH2_SESSION * session, const char *path, struct stat * sb)
{
int path_len = strlen(path);
int rc;
if (session->scpRecv_state == libssh2_NB_state_idle) {
session->scpRecv_mode = 0;
session->scpRecv_size = 0;
session->scpRecv_mtime = 0;
session->scpRecv_atime = 0;
session->scpRecv_command_len = path_len + sizeof("scp -f ");
if (sb) {
session->scpRecv_command_len++;
}
session->scpRecv_command =
LIBSSH2_ALLOC(session, session->scpRecv_command_len);
if (!session->scpRecv_command) {
libssh2_error(session, LIBSSH2_ERROR_ALLOC,
"Unable to allocate a command buffer for SCP session",
0);
return NULL;
}
if (sb) {
memcpy(session->scpRecv_command, "scp -pf ",
sizeof("scp -pf ") - 1);
memcpy(session->scpRecv_command + sizeof("scp -pf ") - 1, path,
path_len);
} else {
memcpy(session->scpRecv_command, "scp -f ", sizeof("scp -f ") - 1);
memcpy(session->scpRecv_command + sizeof("scp -f ") - 1, path,
path_len);
}
session->scpRecv_command[session->scpRecv_command_len - 1] = '\0';
_libssh2_debug(session, LIBSSH2_DBG_SCP,
"Opening channel for SCP receive");
session->scpRecv_state = libssh2_NB_state_created;
}
if (session->scpRecv_state == libssh2_NB_state_created) {
/* Allocate a channel */
do {
session->scpRecv_channel =
libssh2_channel_open_ex(session, "session",
sizeof("session") - 1,
LIBSSH2_CHANNEL_WINDOW_DEFAULT,
LIBSSH2_CHANNEL_PACKET_DEFAULT, NULL,
0);
if (!session->scpRecv_channel) {
if (libssh2_session_last_errno(session) !=
LIBSSH2_ERROR_EAGAIN) {
LIBSSH2_FREE(session, session->scpRecv_command);
session->scpRecv_command = NULL;
session->scpRecv_state = libssh2_NB_state_idle;
return NULL;
} else if (libssh2_session_last_errno(session) ==
LIBSSH2_ERROR_EAGAIN) {
libssh2_error(session, LIBSSH2_ERROR_EAGAIN,
"Would block starting up channel", 0);
return NULL;
}
}
} while (!session->scpRecv_channel);
session->scpRecv_state = libssh2_NB_state_sent;
}
if (session->scpRecv_state == libssh2_NB_state_sent) {
/* Request SCP for the desired file */
rc = libssh2_channel_process_startup(session->scpRecv_channel, "exec",
sizeof("exec") - 1,
(char *) session->scpRecv_command,
session->scpRecv_command_len);
if (rc == PACKET_EAGAIN) {
libssh2_error(session, LIBSSH2_ERROR_EAGAIN,
"Would block requesting SCP startup", 0);
return NULL;
} else if (rc) {
LIBSSH2_FREE(session, session->scpRecv_command);
session->scpRecv_command = NULL;
goto scp_recv_error;
}
LIBSSH2_FREE(session, session->scpRecv_command);
session->scpRecv_command = NULL;
_libssh2_debug(session, LIBSSH2_DBG_SCP, "Sending initial wakeup");
/* SCP ACK */
session->scpRecv_response[0] = '\0';
session->scpRecv_state = libssh2_NB_state_sent1;
}
if (session->scpRecv_state == libssh2_NB_state_sent1) {
rc = libssh2_channel_write_ex(session->scpRecv_channel, 0,
(char *) session->scpRecv_response, 1);
if (rc == PACKET_EAGAIN) {
libssh2_error(session, LIBSSH2_ERROR_EAGAIN,
"Would block sending initial wakeup", 0);
return NULL;
} else if (rc != 1) {
goto scp_recv_error;
}
/* Parse SCP response */
session->scpRecv_response_len = 0;
session->scpRecv_state = libssh2_NB_state_sent2;
}
if ((session->scpRecv_state == libssh2_NB_state_sent2)
|| (session->scpRecv_state == libssh2_NB_state_sent3)) {
while (sb
&& (session->scpRecv_response_len <
LIBSSH2_SCP_RESPONSE_BUFLEN)) {
unsigned char *s, *p;
if (session->scpRecv_state == libssh2_NB_state_sent2) {
rc = libssh2_channel_read_ex(session->scpRecv_channel, 0,
(char *) session->
scpRecv_response +
session->scpRecv_response_len, 1);
if (rc == PACKET_EAGAIN) {
libssh2_error(session, LIBSSH2_ERROR_EAGAIN,
"Would block waiting for SCP response", 0);
return NULL;
} else if (rc <= 0) {
/* Timeout, give up */
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Timed out waiting for SCP response", 0);
goto scp_recv_error;
}
session->scpRecv_response_len++;
if (session->scpRecv_response[0] != 'T') {
/*
* Set this as the default error for here, if
* we are successful it will be replaced
*/
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid data in SCP response, missing Time data",
0);
session->scpRecv_err_len =
libssh2_channel_packet_data_len(session->
scpRecv_channel, 0);
session->scpRecv_err_msg =
LIBSSH2_ALLOC(session, session->scpRecv_err_len + 1);
if (!session->scpRecv_err_msg) {
goto scp_recv_error;
}
memset(session->scpRecv_err_msg, 0,
session->scpRecv_err_len + 1);
/* Read the remote error message */
rc = libssh2_channel_read_ex(session->scpRecv_channel, 0,
session->scpRecv_err_msg,
session->scpRecv_err_len);
if (rc <= 0) {
/*
* Since we have alread started reading this packet, it is
* already in the systems so it can't return PACKET_EAGAIN
*/
LIBSSH2_FREE(session, session->scpRecv_err_msg);
session->scpRecv_err_msg = NULL;
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Unknown error while getting error string",
0);
goto scp_recv_error;
}
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
session->scpRecv_err_msg, 1);
session->scpRecv_err_msg = NULL;
goto scp_recv_error;
}
if ((session->scpRecv_response_len > 1) &&
((session->
scpRecv_response[session->scpRecv_response_len - 1] <
'0')
|| (session->
scpRecv_response[session->scpRecv_response_len - 1] >
'9'))
&& (session->
scpRecv_response[session->scpRecv_response_len - 1] !=
' ')
&& (session->
scpRecv_response[session->scpRecv_response_len - 1] !=
'\r')
&& (session->
scpRecv_response[session->scpRecv_response_len - 1] !=
'\n')) {
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid data in SCP response", 0);
goto scp_recv_error;
}
if ((session->scpRecv_response_len < 9)
|| (session->
scpRecv_response[session->scpRecv_response_len - 1] !=
'\n')) {
if (session->scpRecv_response_len ==
LIBSSH2_SCP_RESPONSE_BUFLEN) {
/* You had your chance */
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Unterminated response from SCP server",
0);
goto scp_recv_error;
}
/* Way too short to be an SCP response, or not done yet, short circuit */
continue;
}
/* We're guaranteed not to go under response_len == 0 by the logic above */
while ((session->
scpRecv_response[session->scpRecv_response_len - 1] ==
'\r')
|| (session->
scpRecv_response[session->scpRecv_response_len -
1] == '\n'))
session->scpRecv_response_len--;
session->scpRecv_response[session->scpRecv_response_len] =
'\0';
if (session->scpRecv_response_len < 8) {
/* EOL came too soon */
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid response from SCP server, too short",
0);
goto scp_recv_error;
}
s = session->scpRecv_response + 1;
p = (unsigned char *) strchr((char *) s, ' ');
if (!p || ((p - s) <= 0)) {
/* No spaces or space in the wrong spot */
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid response from SCP server, malformed mtime",
0);
goto scp_recv_error;
}
*(p++) = '\0';
/* Make sure we don't get fooled by leftover values */
errno = 0;
session->scpRecv_mtime = strtol((char *) s, NULL, 10);
if (errno) {
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid response from SCP server, invalid mtime",
0);
goto scp_recv_error;
}
s = (unsigned char *) strchr((char *) p, ' ');
if (!s || ((s - p) <= 0)) {
/* No spaces or space in the wrong spot */
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid response from SCP server, malformed mtime.usec",
0);
goto scp_recv_error;
}
/* Ignore mtime.usec */
s++;
p = (unsigned char *) strchr((char *) s, ' ');
if (!p || ((p - s) <= 0)) {
/* No spaces or space in the wrong spot */
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid response from SCP server, too short or malformed",
0);
goto scp_recv_error;
}
*(p++) = '\0';
/* Make sure we don't get fooled by leftover values */
errno = 0;
session->scpRecv_atime = strtol((char *) s, NULL, 10);
if (errno) {
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid response from SCP server, invalid atime",
0);
goto scp_recv_error;
}
/* SCP ACK */
session->scpRecv_response[0] = '\0';
session->scpRecv_state = libssh2_NB_state_sent3;
}
if (session->scpRecv_state == libssh2_NB_state_sent3) {
rc = libssh2_channel_write_ex(session->scpRecv_channel, 0,
(char *) session->
scpRecv_response, 1);
if (rc == PACKET_EAGAIN) {
libssh2_error(session, LIBSSH2_ERROR_EAGAIN,
"Would block waiting to send SCP ACK", 0);
return NULL;
} else if (rc != 1) {
goto scp_recv_error;
}
_libssh2_debug(session, LIBSSH2_DBG_SCP,
"mtime = %ld, atime = %ld",
session->scpRecv_mtime, session->scpRecv_atime);
/* We *should* check that atime.usec is valid, but why let that stop use? */
break;
}
}
session->scpRecv_state = libssh2_NB_state_sent4;
}
if (session->scpRecv_state == libssh2_NB_state_sent4) {
session->scpRecv_response_len = 0;
session->scpRecv_state = libssh2_NB_state_sent5;
}
if ((session->scpRecv_state == libssh2_NB_state_sent5)
|| (session->scpRecv_state == libssh2_NB_state_sent6)) {
while (session->scpRecv_response_len < LIBSSH2_SCP_RESPONSE_BUFLEN) {
char *s, *p, *e = NULL;
if (session->scpRecv_state == libssh2_NB_state_sent5) {
rc = libssh2_channel_read_ex(session->scpRecv_channel, 0,
(char *) session->
scpRecv_response +
session->scpRecv_response_len, 1);
if (rc == PACKET_EAGAIN) {
libssh2_error(session, LIBSSH2_ERROR_EAGAIN,
"Would block waiting for SCP response", 0);
return NULL;
} else if (rc <= 0) {
/* Timeout, give up */
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Timed out waiting for SCP response", 0);
goto scp_recv_error;
}
session->scpRecv_response_len++;
if (session->scpRecv_response[0] != 'C') {
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid response from SCP server", 0);
goto scp_recv_error;
}
if ((session->scpRecv_response_len > 1) &&
(session->
scpRecv_response[session->scpRecv_response_len - 1] !=
'\r')
&& (session->
scpRecv_response[session->scpRecv_response_len - 1] !=
'\n')
&&
((session->
scpRecv_response[session->scpRecv_response_len - 1] < 32)
|| (session->
scpRecv_response[session->scpRecv_response_len - 1] >
126))) {
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid data in SCP response", 0);
goto scp_recv_error;
}
if ((session->scpRecv_response_len < 7)
|| (session->
scpRecv_response[session->scpRecv_response_len - 1] !=
'\n')) {
if (session->scpRecv_response_len ==
LIBSSH2_SCP_RESPONSE_BUFLEN) {
/* You had your chance */
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Unterminated response from SCP server",
0);
goto scp_recv_error;
}
/* Way too short to be an SCP response, or not done yet, short circuit */
continue;
}
/* We're guaranteed not to go under response_len == 0 by the logic above */
while ((session->
scpRecv_response[session->scpRecv_response_len - 1] ==
'\r')
|| (session->
scpRecv_response[session->scpRecv_response_len -
1] == '\n')) {
session->scpRecv_response_len--;
}
session->scpRecv_response[session->scpRecv_response_len] =
'\0';
if (session->scpRecv_response_len < 6) {
/* EOL came too soon */
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid response from SCP server, too short",
0);
goto scp_recv_error;
}
s = (char *) session->scpRecv_response + 1;
p = strchr(s, ' ');
if (!p || ((p - s) <= 0)) {
/* No spaces or space in the wrong spot */
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid response from SCP server, malformed mode",
0);
goto scp_recv_error;
}
*(p++) = '\0';
/* Make sure we don't get fooled by leftover values */
errno = 0;
session->scpRecv_mode = strtol(s, &e, 8);
if ((e && *e) || errno) {
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid response from SCP server, invalid mode",
0);
goto scp_recv_error;
}
s = strchr(p, ' ');
if (!s || ((s - p) <= 0)) {
/* No spaces or space in the wrong spot */
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid response from SCP server, too short or malformed",
0);
goto scp_recv_error;
}
*(s++) = '\0';
/* Make sure we don't get fooled by leftover values */
errno = 0;
session->scpRecv_size = scpsize_strtol(p, &e, 10);
if ((e && *e) || errno) {
libssh2_error(session, LIBSSH2_ERROR_SCP_PROTOCOL,
"Invalid response from SCP server, invalid size",
0);
goto scp_recv_error;
}
/* SCP ACK */
session->scpRecv_response[0] = '\0';
session->scpRecv_state = libssh2_NB_state_sent6;
}
if (session->scpRecv_state == libssh2_NB_state_sent6) {
rc = libssh2_channel_write_ex(session->scpRecv_channel, 0,
(char *) session->
scpRecv_response, 1);
if (rc == PACKET_EAGAIN) {
libssh2_error(session, LIBSSH2_ERROR_EAGAIN,
"Would block sending SCP ACK", 0);
return NULL;
} else if (rc != 1) {
goto scp_recv_error;
}
_libssh2_debug(session, LIBSSH2_DBG_SCP,
"mode = 0%lo size = %ld", session->scpRecv_mode,
session->scpRecv_size);
/* We *should* check that basename is valid, but why let that stop us? */
break;
}
}
session->scpRecv_state = libssh2_NB_state_sent7;
}
if (sb) {
memset(sb, 0, sizeof(struct stat));
sb->st_mtime = session->scpRecv_mtime;
sb->st_atime = session->scpRecv_atime;
sb->st_size = session->scpRecv_size;
sb->st_mode = session->scpRecv_mode;
}
session->scpRecv_state = libssh2_NB_state_idle;
return session->scpRecv_channel;
scp_recv_error:
while (libssh2_channel_free(session->scpRecv_channel) == PACKET_EAGAIN);
session->scpRecv_channel = NULL;
session->scpRecv_state = libssh2_NB_state_idle;
return NULL;
}
mx_channel_t *
mx_channel_netconf (mx_sock_session_t *mssp, mx_sock_t *client, int xml_mode)
{
LIBSSH2_CHANNEL *channel;
mx_channel_t *mcp;
mcp = TAILQ_FIRST(&mssp->mss_released);
if (mcp) {
mx_log("S%u reusing channel C%u for client S%u",
mssp->mss_base.ms_id, mcp->mc_id, client->ms_id);
TAILQ_REMOVE(&mssp->mss_released, mcp, mc_link);
TAILQ_INSERT_HEAD(&mssp->mss_channels, mcp, mc_link);
mcp->mc_state = MSS_RPC_INITIAL;
mcp->mc_client = client;
if (mx_mti(client)->mti_set_channel)
mx_mti(client)->mti_set_channel(client, mcp->mc_session, mcp);
return mcp;
}
/* Must use blocking IO for channel creation */
libssh2_session_set_blocking(mssp->mss_session, 1);
channel = libssh2_channel_open_session(mssp->mss_session);
if (channel == NULL) {
mx_log("S%u could not open netconf channel", mssp->mss_base.ms_id);
return NULL;
}
if (!xml_mode) {
if (libssh2_channel_subsystem(channel, "netconf") != 0) {
mx_log("S%u could not open netconf subsystem",
mssp->mss_base.ms_id);
goto try_xml_mode;
}
mx_log("S%u opened netconf subsystem channel to %s",
mssp->mss_base.ms_id, mssp->mss_target);
} else {
static const char command[] = "xml-mode netconf need-trailer";
try_xml_mode:
if (libssh2_channel_process_startup(channel,
"exec", sizeof("exec") - 1,
command, strlen(command)) != 0) {
mx_log("S%u could not open netconf xml-mode",
mssp->mss_base.ms_id);
libssh2_channel_free(channel);
channel = NULL;
} else {
mx_log("S%u opened netconf xml-mode channel to %s",
mssp->mss_base.ms_id, mssp->mss_target);
}
}
libssh2_session_set_blocking(mssp->mss_session, 0);
if (channel == NULL) {
mx_log("S%u could not open netconf channel", mssp->mss_base.ms_id);
return NULL;
}
mcp = mx_channel_create(mssp, client, channel);
if (mcp == NULL) {
/* XXX fail */
return NULL;
}
mx_channel_netconf_send_hello(mcp);
mx_channel_netconf_read_hello(mcp);
return mcp;
}
