size_t clistr_push_fn(struct cli_state *cli,
void *dest,
const char *src,
int dest_len,
int flags)
{
size_t buf_used = PTR_DIFF(dest, cli->outbuf);
if (dest_len == -1) {
if (((ptrdiff_t)dest < (ptrdiff_t)cli->outbuf) || (buf_used > cli->bufsize)) {
DEBUG(0, ("Pushing string of 'unlimited' length into non-SMB buffer!\n"));
return push_string_base(cli->outbuf,
(uint16_t)(cli_ucs2(cli) ? FLAGS2_UNICODE_STRINGS : 0),
dest, src, -1, flags);
}
return push_string_base(cli->outbuf,
(uint16_t)(cli_ucs2(cli) ? FLAGS2_UNICODE_STRINGS : 0),
dest, src, cli->bufsize - buf_used,
flags);
}
/* 'normal' push into size-specified buffer */
return push_string_base(cli->outbuf,
(uint16_t)(cli_ucs2(cli) ? FLAGS2_UNICODE_STRINGS : 0),
dest, src, dest_len, flags);
}
NTSTATUS cli_dfs_get_referral(TALLOC_CTX *ctx,
struct cli_state *cli,
const char *path,
struct client_dfs_referral **refs,
size_t *num_refs,
size_t *consumed)
{
unsigned int data_len = 0;
unsigned int param_len = 0;
uint16_t setup[1];
uint16_t recv_flags2;
uint8_t *param = NULL;
uint8_t *rdata = NULL;
char *p;
char *endp;
smb_ucs2_t *path_ucs;
char *consumed_path = NULL;
uint16_t consumed_ucs;
uint16 num_referrals;
struct client_dfs_referral *referrals = NULL;
NTSTATUS status;
TALLOC_CTX *frame = talloc_stackframe();
*num_refs = 0;
*refs = NULL;
SSVAL(setup, 0, TRANSACT2_GET_DFS_REFERRAL);
param = talloc_array(talloc_tos(), uint8_t, 2);
if (!param) {
status = NT_STATUS_NO_MEMORY;
goto out;
}
SSVAL(param, 0, 0x03); /* max referral level */
param = trans2_bytes_push_str(param, cli_ucs2(cli),
path, strlen(path)+1,
NULL);
if (!param) {
status = NT_STATUS_NO_MEMORY;
goto out;
}
param_len = talloc_get_size(param);
path_ucs = (smb_ucs2_t *)¶m[2];
status = cli_trans(talloc_tos(), cli, SMBtrans2,
NULL, 0xffff, 0, 0,
setup, 1, 0,
param, param_len, 2,
NULL, 0, CLI_BUFFER_SIZE,
&recv_flags2,
NULL, 0, NULL, /* rsetup */
NULL, 0, NULL,
&rdata, 4, &data_len);
if (!NT_STATUS_IS_OK(status)) {
goto out;
}
endp = (char *)rdata + data_len;
consumed_ucs = SVAL(rdata, 0);
num_referrals = SVAL(rdata, 2);
/* consumed_ucs is the number of bytes
* of the UCS2 path consumed not counting any
* terminating null. We need to convert
* back to unix charset and count again
* to get the number of bytes consumed from
* the incoming path. */
errno = 0;
if (pull_string_talloc(talloc_tos(),
NULL,
0,
&consumed_path,
path_ucs,
consumed_ucs,
STR_UNICODE) == 0) {
if (errno != 0) {
status = map_nt_error_from_unix(errno);
} else {
status = NT_STATUS_INVALID_NETWORK_RESPONSE;
}
goto out;
}
if (consumed_path == NULL) {
status = map_nt_error_from_unix(errno);
goto out;
}
*consumed = strlen(consumed_path);
if (num_referrals != 0) {
uint16 ref_version;
uint16 ref_size;
int i;
uint16 node_offset;
referrals = talloc_array(ctx, struct client_dfs_referral,
num_referrals);
if (!referrals) {
status = NT_STATUS_NO_MEMORY;
goto out;
}
/* start at the referrals array */
p = (char *)rdata+8;
for (i=0; i<num_referrals && p < endp; i++) {
if (p + 18 > endp) {
goto out;
}
ref_version = SVAL(p, 0);
ref_size = SVAL(p, 2);
node_offset = SVAL(p, 16);
if (ref_version != 3) {
p += ref_size;
continue;
}
referrals[i].proximity = SVAL(p, 8);
referrals[i].ttl = SVAL(p, 10);
if (p + node_offset > endp) {
status = NT_STATUS_INVALID_NETWORK_RESPONSE;
goto out;
}
clistr_pull_talloc(referrals,
(const char *)rdata,
recv_flags2,
&referrals[i].dfspath,
p+node_offset,
PTR_DIFF(endp, p+node_offset),
STR_TERMINATE|STR_UNICODE);
if (!referrals[i].dfspath) {
status = map_nt_error_from_unix(errno);
goto out;
}
p += ref_size;
}
if (i < num_referrals) {
status = NT_STATUS_INVALID_NETWORK_RESPONSE;
goto out;
}
}
struct tevent_req *cli_trans_send(
TALLOC_CTX *mem_ctx, struct event_context *ev,
struct cli_state *cli, uint8_t cmd,
const char *pipe_name, uint16_t fid, uint16_t function, int flags,
uint16_t *setup, uint8_t num_setup, uint8_t max_setup,
uint8_t *param, uint32_t num_param, uint32_t max_param,
uint8_t *data, uint32_t num_data, uint32_t max_data)
{
struct tevent_req *req, *subreq;
struct cli_trans_state *state;
int iov_count;
uint8_t wct;
req = tevent_req_create(mem_ctx, &state, struct cli_trans_state);
if (req == NULL) {
return NULL;
}
if ((cmd == SMBtrans) || (cmd == SMBtrans2)) {
if ((num_param > 0xffff) || (max_param > 0xffff)
|| (num_data > 0xffff) || (max_data > 0xffff)) {
DEBUG(3, ("Attempt to send invalid trans2 request "
"(setup %u, params %u/%u, data %u/%u)\n",
(unsigned)num_setup,
(unsigned)num_param, (unsigned)max_param,
(unsigned)num_data, (unsigned)max_data));
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
}
/*
* The largest wct will be for nttrans (19+num_setup). Make sure we
* don't overflow state->vwv in cli_trans_format.
*/
if ((num_setup + 19) > ARRAY_SIZE(state->vwv)) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
state->cli = cli;
state->ev = ev;
state->cmd = cmd;
state->flags = flags;
state->num_rsetup = 0;
state->rsetup = NULL;
ZERO_STRUCT(state->rparam);
ZERO_STRUCT(state->rdata);
if ((pipe_name != NULL)
&& (!convert_string_talloc(state, CH_UNIX,
cli_ucs2(cli) ? CH_UTF16LE : CH_DOS,
pipe_name, strlen(pipe_name) + 1,
&state->pipe_name_conv,
&state->pipe_name_conv_len, true))) {
tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
return tevent_req_post(req, ev);
}
state->fid = fid; /* trans2 */
state->function = function; /* nttrans */
state->setup = setup;
state->num_setup = num_setup;
state->max_setup = max_setup;
state->param = param;
state->num_param = num_param;
state->param_sent = 0;
state->rparam.max = max_param;
state->data = data;
state->num_data = num_data;
state->data_sent = 0;
state->rdata.max = max_data;
cli_trans_format(state, &wct, &iov_count);
subreq = cli_smb_req_create(state, ev, cli, cmd, 0, wct, state->vwv,
iov_count, state->iov);
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
state->mid = cli_smb_req_mid(subreq);
if (!cli_smb_req_send(subreq)) {
tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
return tevent_req_post(req, state->ev);
}
cli_state_seqnum_persistent(cli, state->mid);
tevent_req_set_callback(subreq, cli_trans_done, req);
return req;
}
/****************************************************************************
check for existance of a nttrans call
****************************************************************************/
static bool scan_nttrans(struct cli_state *cli, int op, int level,
int fnum, int dnum, const char *fname)
{
uint32_t data_len = 0;
uint32_t param_len = 0;
uint32_t rparam_len, rdata_len;
uint8_t *param = NULL;
uint8_t data[DATA_SIZE];
NTSTATUS status;
const char *newfname;
const char *dname;
memset(data, 0, sizeof(data));
data_len = 4;
/* try with a info level only */
TALLOC_FREE(param);
param = talloc_array(talloc_tos(), uint8_t, 2);
if (param == NULL) return True;
SSVAL(param, 0, level);
param_len = talloc_get_size(param);
status = try_nttrans_len(cli, "void", op, level, param, data, param_len, &data_len,
&rparam_len, &rdata_len);
if (NT_STATUS_IS_OK(status)) return True;
/* try with a file descriptor */
TALLOC_FREE(param);
param = talloc_array(talloc_tos(), uint8_t, 6);
if (param == NULL) return True;
SSVAL(param, 0, fnum);
SSVAL(param, 2, level);
SSVAL(param, 4, 0);
param_len = talloc_get_size(param);
status = try_nttrans_len(cli, "fnum", op, level, param, data, param_len, &data_len,
&rparam_len, &rdata_len);
if (NT_STATUS_IS_OK(status)) return True;
/* try with a notify style */
TALLOC_FREE(param);
param = talloc_array(talloc_tos(), uint8_t, 6);
if (param == NULL) return True;
SSVAL(param, 0, dnum);
SSVAL(param, 2, dnum);
SSVAL(param, 4, level);
param_len = talloc_get_size(param);
status = try_nttrans_len(cli, "notify", op, level, param, data, param_len, &data_len,
&rparam_len, &rdata_len);
if (NT_STATUS_IS_OK(status)) return True;
/* try with a file name */
TALLOC_FREE(param);
param = talloc_array(talloc_tos(), uint8_t, 6);
if (param == NULL) return True;
SSVAL(param, 0, level);
SSVAL(param, 2, 0);
SSVAL(param, 4, 0);
param = trans2_bytes_push_str(param, cli_ucs2(cli),
fname, strlen(fname)+1, NULL);
if (param == NULL) return True;
param_len = talloc_get_size(param);
status = try_nttrans_len(cli, "fname", op, level, param, data, param_len, &data_len,
&rparam_len, &rdata_len);
if (NT_STATUS_IS_OK(status)) return True;
/* try with a new file name */
newfname = "\\newfile.dat";
TALLOC_FREE(param);
param = talloc_array(talloc_tos(), uint8_t, 6);
if (param == NULL) return True;
SSVAL(param, 0, level);
SSVAL(param, 2, 0);
SSVAL(param, 4, 0);
param = trans2_bytes_push_str(param, cli_ucs2(cli),
newfname, strlen(newfname)+1, NULL);
if (param == NULL) return True;
param_len = talloc_get_size(param);
status = try_nttrans_len(cli, "newfile", op, level, param, data, param_len, &data_len,
&rparam_len, &rdata_len);
cli_unlink(cli, newfname, FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_HIDDEN);
cli_rmdir(cli, newfname);
if (NT_STATUS_IS_OK(status)) return True;
/* try dfs style */
dname = "\\testdir";
cli_mkdir(cli, dname);
TALLOC_FREE(param);
param = talloc_array(talloc_tos(), uint8_t, 2);
if (param == NULL) return True;
SSVAL(param, 0, level);
param = trans2_bytes_push_str(param, cli_ucs2(cli),
dname, strlen(dname)+1, NULL);
if (param == NULL) return True;
param_len = talloc_get_size(param);
status = try_nttrans_len(cli, "dfs", op, level, param, data, param_len, &data_len,
&rparam_len, &rdata_len);
cli_rmdir(cli, dname);
if (NT_STATUS_IS_OK(status)) return True;
return False;
}
