*/
#include "includes.h"
-
-/**
- * Fetch an error out of a NBT packet
- * @param[in] buf The SMB packet
- * @retval The error, converted to NTSTATUS
- */
-
-NTSTATUS cli_pull_error(char *buf)
+#include "libsmb/libsmb.h"
+#include "../lib/async_req/async_sock.h"
+#include "../lib/util/tevent_ntstatus.h"
+#include "../lib/util/tevent_unix.h"
+#include "async_smb.h"
+#include "smb_crypt.h"
+#include "libsmb/nmblib.h"
+#include "read_smb.h"
+
+static NTSTATUS cli_pull_raw_error(const uint8_t *buf)
{
uint32_t flags2 = SVAL(buf, smb_flg2);
return NT_STATUS(IVAL(buf, smb_rcls));
}
- /* if the client uses dos errors, but there is no error,
- we should return no error here, otherwise it looks
- like an unknown bad NT_STATUS. jmcd */
- if (CVAL(buf, smb_rcls) == 0)
- return NT_STATUS_OK;
-
return NT_STATUS_DOS(CVAL(buf, smb_rcls), SVAL(buf,smb_err));
}
-/**
- * Compatibility helper for the sync APIs: Fake NTSTATUS in cli->inbuf
- * @param[in] cli The client connection that just received an error
- * @param[in] status The error to set on "cli"
- */
-
-void cli_set_error(struct cli_state *cli, NTSTATUS status)
-{
- uint32_t flags2 = SVAL(cli->inbuf, smb_flg2);
-
- if (NT_STATUS_IS_DOS(status)) {
- SSVAL(cli->inbuf, smb_flg2,
- flags2 & ~FLAGS2_32_BIT_ERROR_CODES);
- SCVAL(cli->inbuf, smb_rcls, NT_STATUS_DOS_CLASS(status));
- SSVAL(cli->inbuf, smb_err, NT_STATUS_DOS_CODE(status));
- return;
- }
-
- SSVAL(cli->inbuf, smb_flg2, flags2 | FLAGS2_32_BIT_ERROR_CODES);
- SIVAL(cli->inbuf, smb_rcls, NT_STATUS_V(status));
- return;
-}
-
-/**
- * @brief Find the smb_cmd offset of the last command pushed
- * @param[in] buf The buffer we're building up
- * @retval Where can we put our next andx cmd?
- *
- * While chaining requests, the "next" request we're looking at needs to put
- * its SMB_Command before the data the previous request already built up added
- * to the chain. Find the offset to the place where we have to put our cmd.
- */
-
-static bool find_andx_cmd_ofs(uint8_t *buf, size_t *pofs)
-{
- uint8_t cmd;
- size_t ofs;
-
- cmd = CVAL(buf, smb_com);
-
- SMB_ASSERT(is_andx_req(cmd));
-
- ofs = smb_vwv0;
-
- while (CVAL(buf, ofs) != 0xff) {
-
- if (!is_andx_req(CVAL(buf, ofs))) {
- return false;
- }
-
- /*
- * ofs is from start of smb header, so add the 4 length
- * bytes. The next cmd is right after the wct field.
- */
- ofs = SVAL(buf, ofs+2) + 4 + 1;
-
- SMB_ASSERT(ofs+4 < talloc_get_size(buf));
- }
-
- *pofs = ofs;
- return true;
-}
-
-/**
- * @brief Do the smb chaining at a buffer level
- * @param[in] poutbuf Pointer to the talloc'ed buffer to be modified
- * @param[in] smb_command The command that we want to issue
- * @param[in] wct How many words?
- * @param[in] vwv The words, already in network order
- * @param[in] bytes_alignment How shall we align "bytes"?
- * @param[in] num_bytes How many bytes?
- * @param[in] bytes The data the request ships
- *
- * smb_splice_chain() adds the vwv and bytes to the request already present in
- * *poutbuf.
- */
-
-bool smb_splice_chain(uint8_t **poutbuf, uint8_t smb_command,
- uint8_t wct, const uint16_t *vwv,
- size_t bytes_alignment,
- uint32_t num_bytes, const uint8_t *bytes)
-{
- uint8_t *outbuf;
- size_t old_size, new_size;
- size_t ofs;
- size_t chain_padding = 0;
- size_t bytes_padding = 0;
- bool first_request;
-
- old_size = talloc_get_size(*poutbuf);
-
- /*
- * old_size == smb_wct means we're pushing the first request in for
- * libsmb/
- */
-
- first_request = (old_size == smb_wct);
-
- if (!first_request && ((old_size % 4) != 0)) {
- /*
- * Align the wct field of subsequent requests to a 4-byte
- * boundary
- */
- chain_padding = 4 - (old_size % 4);
- }
-
- /*
- * After the old request comes the new wct field (1 byte), the vwv's
- * and the num_bytes field. After at we might need to align the bytes
- * given to us to "bytes_alignment", increasing the num_bytes value.
- */
-
- new_size = old_size + chain_padding + 1 + wct * sizeof(uint16_t) + 2;
-
- if ((bytes_alignment != 0) && ((new_size % bytes_alignment) != 0)) {
- bytes_padding = bytes_alignment - (new_size % bytes_alignment);
- }
-
- new_size += bytes_padding + num_bytes;
-
- if ((smb_command != SMBwriteX) && (new_size > 0xffff)) {
- DEBUG(1, ("splice_chain: %u bytes won't fit\n",
- (unsigned)new_size));
- return false;
- }
-
- outbuf = TALLOC_REALLOC_ARRAY(NULL, *poutbuf, uint8_t, new_size);
- if (outbuf == NULL) {
- DEBUG(0, ("talloc failed\n"));
- return false;
- }
- *poutbuf = outbuf;
-
- if (first_request) {
- SCVAL(outbuf, smb_com, smb_command);
- } else {
- size_t andx_cmd_ofs;
-
- if (!find_andx_cmd_ofs(outbuf, &andx_cmd_ofs)) {
- DEBUG(1, ("invalid command chain\n"));
- *poutbuf = TALLOC_REALLOC_ARRAY(
- NULL, *poutbuf, uint8_t, old_size);
- return false;
- }
-
- if (chain_padding != 0) {
- memset(outbuf + old_size, 0, chain_padding);
- old_size += chain_padding;
- }
-
- SCVAL(outbuf, andx_cmd_ofs, smb_command);
- SSVAL(outbuf, andx_cmd_ofs + 2, old_size - 4);
- }
-
- ofs = old_size;
-
- /*
- * Push the chained request:
- *
- * wct field
- */
-
- SCVAL(outbuf, ofs, wct);
- ofs += 1;
-
- /*
- * vwv array
- */
-
- memcpy(outbuf + ofs, vwv, sizeof(uint16_t) * wct);
- ofs += sizeof(uint16_t) * wct;
-
- /*
- * bcc (byte count)
- */
-
- SSVAL(outbuf, ofs, num_bytes + bytes_padding);
- ofs += sizeof(uint16_t);
-
- /*
- * padding
- */
-
- if (bytes_padding != 0) {
- memset(outbuf + ofs, 0, bytes_padding);
- ofs += bytes_padding;
- }
-
- /*
- * The bytes field
- */
-
- memcpy(outbuf + ofs, bytes, num_bytes);
-
- return true;
-}
-
/**
* Figure out if there is an andx command behind the current one
* @param[in] buf The smb buffer to look at
uint8_t *inbuf;
uint32_t seqnum;
int chain_num;
+ int chain_length;
struct tevent_req **chained_requests;
+
+ bool one_way;
};
static uint16_t cli_alloc_mid(struct cli_state *cli)
{
- int num_pending = talloc_array_length(cli->pending);
+ int num_pending = talloc_array_length(cli->conn.pending);
uint16_t result;
while (true) {
int i;
- result = cli->mid++;
- if (result == 0) {
+ result = cli->smb1.mid++;
+ if ((result == 0) || (result == 0xffff)) {
continue;
}
for (i=0; i<num_pending; i++) {
- if (result == cli_smb_req_mid(cli->pending[i])) {
+ if (result == cli_smb_req_mid(cli->conn.pending[i])) {
break;
}
}
struct cli_smb_state *state = tevent_req_data(
req, struct cli_smb_state);
struct cli_state *cli = state->cli;
- int num_pending = talloc_array_length(cli->pending);
+ int num_pending = talloc_array_length(cli->conn.pending);
int i;
+ if (state->mid != 0) {
+ /*
+ * This is a [nt]trans[2] request which waits
+ * for more than one reply.
+ */
+ return;
+ }
+
+ talloc_set_destructor(req, NULL);
+
if (num_pending == 1) {
/*
* The pending read_smb tevent_req is a child of
* cli->pending. So if nothing is pending anymore, we need to
* delete the socket read fde.
*/
- TALLOC_FREE(cli->pending);
+ TALLOC_FREE(cli->conn.pending);
+ cli->conn.read_smb_req = NULL;
return;
}
for (i=0; i<num_pending; i++) {
- if (req == cli->pending[i]) {
+ if (req == cli->conn.pending[i]) {
break;
}
}
/*
* Something's seriously broken. Just returning here is the
* right thing nevertheless, the point of this routine is to
- * remove ourselves from cli->pending.
+ * remove ourselves from cli->conn.pending.
*/
return;
}
/*
- * Remove ourselves from the cli->pending array
+ * Remove ourselves from the cli->conn.pending array
*/
- if (num_pending > 1) {
- cli->pending[i] = cli->pending[num_pending-1];
+ for (; i < (num_pending - 1); i++) {
+ cli->conn.pending[i] = cli->conn.pending[i+1];
}
/*
* No NULL check here, we're shrinking by sizeof(void *), and
* talloc_realloc just adjusts the size for this.
*/
- cli->pending = talloc_realloc(NULL, cli->pending, struct tevent_req *,
- num_pending - 1);
+ cli->conn.pending = talloc_realloc(NULL, cli->conn.pending,
+ struct tevent_req *,
+ num_pending - 1);
return;
}
static int cli_smb_req_destructor(struct tevent_req *req)
{
+ struct cli_smb_state *state = tevent_req_data(
+ req, struct cli_smb_state);
+ /*
+ * Make sure we really remove it from
+ * the pending array on destruction.
+ */
+ state->mid = 0;
cli_smb_req_unset_pending(req);
return 0;
}
-static void cli_smb_received(struct tevent_req *subreq);
+static bool cli_state_receive_next(struct cli_state *cli);
+static void cli_state_notify_pending(struct cli_state *cli, NTSTATUS status);
bool cli_smb_req_set_pending(struct tevent_req *req)
{
struct cli_state *cli;
struct tevent_req **pending;
int num_pending;
- struct tevent_req *subreq;
cli = state->cli;
- num_pending = talloc_array_length(cli->pending);
+ num_pending = talloc_array_length(cli->conn.pending);
- pending = talloc_realloc(cli, cli->pending, struct tevent_req *,
+ pending = talloc_realloc(cli, cli->conn.pending, struct tevent_req *,
num_pending+1);
if (pending == NULL) {
return false;
}
pending[num_pending] = req;
- cli->pending = pending;
+ cli->conn.pending = pending;
talloc_set_destructor(req, cli_smb_req_destructor);
- if (num_pending > 0) {
+ if (!cli_state_receive_next(cli)) {
+ /*
+ * the caller should notify the current request
+ *
+ * And all other pending requests get notified
+ * by cli_state_notify_pending().
+ */
+ cli_smb_req_unset_pending(req);
+ cli_state_notify_pending(cli, NT_STATUS_NO_MEMORY);
+ return false;
+ }
+
+ return true;
+}
+
+static void cli_smb_received(struct tevent_req *subreq);
+static NTSTATUS cli_state_dispatch_smb1(struct cli_state *cli,
+ TALLOC_CTX *frame,
+ uint8_t *inbuf);
+
+static bool cli_state_receive_next(struct cli_state *cli)
+{
+ size_t num_pending = talloc_array_length(cli->conn.pending);
+ struct tevent_req *req;
+ struct cli_smb_state *state;
+
+ if (cli->conn.read_smb_req != NULL) {
+ return true;
+ }
+
+ if (num_pending == 0) {
return true;
}
+ req = cli->conn.pending[0];
+ state = tevent_req_data(req, struct cli_smb_state);
+
+ cli->conn.dispatch_incoming = cli_state_dispatch_smb1;
+
/*
* We're the first ones, add the read_smb request that waits for the
* answer from the server
*/
- subreq = read_smb_send(cli->pending, state->ev, cli->fd);
- if (subreq == NULL) {
- cli_smb_req_unset_pending(req);
+ cli->conn.read_smb_req = read_smb_send(cli->conn.pending, state->ev,
+ cli->conn.fd);
+ if (cli->conn.read_smb_req == NULL) {
return false;
}
- tevent_req_set_callback(subreq, cli_smb_received, cli);
+ tevent_req_set_callback(cli->conn.read_smb_req, cli_smb_received, cli);
return true;
}
+static void cli_state_notify_pending(struct cli_state *cli, NTSTATUS status)
+{
+ cli_state_disconnect(cli);
+
+ /*
+ * Cancel all pending requests. We do not do a for-loop walking
+ * cli->conn.pending because that array changes in
+ * cli_smb_req_destructor().
+ */
+ while (talloc_array_length(cli->conn.pending) > 0) {
+ struct tevent_req *req;
+ struct cli_smb_state *state;
+
+ req = cli->conn.pending[0];
+ state = tevent_req_data(req, struct cli_smb_state);
+
+ cli_smb_req_unset_pending(req);
+
+ /*
+ * we need to defer the callback, because we may notify more
+ * then one caller.
+ */
+ tevent_req_defer_callback(req, state->ev);
+ tevent_req_nterror(req, status);
+ }
+}
+
/*
* Fetch a smb request's mid. Only valid after the request has been sent by
* cli_smb_req_send().
state->mid = mid;
}
+uint32_t cli_smb_req_seqnum(struct tevent_req *req)
+{
+ struct cli_smb_state *state = tevent_req_data(
+ req, struct cli_smb_state);
+ return state->seqnum;
+}
+
+void cli_smb_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
+{
+ struct cli_smb_state *state = tevent_req_data(
+ req, struct cli_smb_state);
+ state->seqnum = seqnum;
+}
+
static size_t iov_len(const struct iovec *iov, int count)
{
size_t result = 0;
{
struct tevent_req *result;
struct cli_smb_state *state;
+ struct timeval endtime;
if (iov_count > MAX_SMB_IOV) {
/*
cli_setup_packet_buf(cli, (char *)state->header);
SCVAL(state->header, smb_com, smb_command);
- SSVAL(state->header, smb_tid, cli->cnum);
+ SSVAL(state->header, smb_tid, cli->smb1.tid);
SCVAL(state->header, smb_wct, wct);
state->vwv = vwv;
SSVAL(state->bytecount_buf, 0, iov_len(bytes_iov, iov_count));
- state->iov[0].iov_base = state->header;
+ state->iov[0].iov_base = (void *)state->header;
state->iov[0].iov_len = sizeof(state->header);
- state->iov[1].iov_base = state->vwv;
+ state->iov[1].iov_base = (void *)state->vwv;
state->iov[1].iov_len = wct * sizeof(uint16_t);
- state->iov[2].iov_base = state->bytecount_buf;
+ state->iov[2].iov_base = (void *)state->bytecount_buf;
state->iov[2].iov_len = sizeof(uint16_t);
if (iov_count != 0) {
}
state->iov_count = iov_count + 3;
+ if (cli->timeout) {
+ endtime = timeval_current_ofs_msec(cli->timeout);
+ if (!tevent_req_set_endtime(result, ev, endtime)) {
+ tevent_req_oom(result);
+ }
+ }
+
+ switch (smb_command) {
+ case SMBtranss:
+ case SMBtranss2:
+ case SMBnttranss:
+ case SMBntcancel:
+ state->one_way = true;
+ break;
+ case SMBlockingX:
+ if ((wct == 8) &&
+ (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
+ state->one_way = true;
+ }
+ break;
+ }
+
return result;
}
-static bool cli_signv(struct cli_state *cli, struct iovec *iov, int count,
- uint32_t *seqnum)
+static NTSTATUS cli_signv(struct cli_state *cli, struct iovec *iov, int count,
+ uint32_t *seqnum)
{
uint8_t *buf;
*/
if ((count <= 0) || (iov[0].iov_len < smb_wct)) {
- return false;
+ return NT_STATUS_INVALID_PARAMETER;
}
buf = iov_concat(talloc_tos(), iov, count);
if (buf == NULL) {
- return false;
+ return NT_STATUS_NO_MEMORY;
}
cli_calculate_sign_mac(cli, (char *)buf, seqnum);
memcpy(iov[0].iov_base, buf, iov[0].iov_len);
TALLOC_FREE(buf);
- return true;
+ return NT_STATUS_OK;
}
static void cli_smb_sent(struct tevent_req *subreq);
-static bool cli_smb_req_iov_send(struct tevent_req *req,
- struct cli_smb_state *state,
- struct iovec *iov, int iov_count)
+static NTSTATUS cli_smb_req_iov_send(struct tevent_req *req,
+ struct cli_smb_state *state,
+ struct iovec *iov, int iov_count)
{
struct tevent_req *subreq;
+ NTSTATUS status;
+
+ if (!cli_state_is_connected(state->cli)) {
+ return NT_STATUS_CONNECTION_INVALID;
+ }
if (iov[0].iov_len < smb_wct) {
- return false;
+ return NT_STATUS_INVALID_PARAMETER;
}
if (state->mid != 0) {
SSVAL(iov[0].iov_base, smb_mid, state->mid);
} else {
- SSVAL(iov[0].iov_base, smb_mid, cli_alloc_mid(state->cli));
+ uint16_t mid = cli_alloc_mid(state->cli);
+ SSVAL(iov[0].iov_base, smb_mid, mid);
}
smb_setlen((char *)iov[0].iov_base, iov_len(iov, iov_count) - 4);
- if (!cli_signv(state->cli, iov, iov_count, &state->seqnum)) {
- return false;
+ status = cli_signv(state->cli, iov, iov_count, &state->seqnum);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
}
if (cli_encryption_on(state->cli)) {
- NTSTATUS status;
char *buf, *enc_buf;
buf = (char *)iov_concat(talloc_tos(), iov, iov_count);
if (buf == NULL) {
- return false;
+ return NT_STATUS_NO_MEMORY;
}
- status = cli_encrypt_message(state->cli, (char *)buf,
- &enc_buf);
+ status = common_encrypt_buffer(state->cli->trans_enc_state,
+ (char *)buf, &enc_buf);
TALLOC_FREE(buf);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Error in encrypting client message: %s\n",
nt_errstr(status)));
- return false;
+ return status;
}
buf = (char *)talloc_memdup(state, enc_buf,
smb_len(enc_buf)+4);
SAFE_FREE(enc_buf);
if (buf == NULL) {
- return false;
+ return NT_STATUS_NO_MEMORY;
}
- iov[0].iov_base = buf;
+ iov[0].iov_base = (void *)buf;
iov[0].iov_len = talloc_get_size(buf);
- subreq = writev_send(state, state->ev, state->cli->outgoing,
- state->cli->fd, iov, 1);
- } else {
- subreq = writev_send(state, state->ev, state->cli->outgoing,
- state->cli->fd, iov, iov_count);
+ iov_count = 1;
}
+ subreq = writev_send(state, state->ev, state->cli->conn.outgoing,
+ state->cli->conn.fd, false, iov, iov_count);
if (subreq == NULL) {
- return false;
+ return NT_STATUS_NO_MEMORY;
}
tevent_req_set_callback(subreq, cli_smb_sent, req);
- return true;
+ return NT_STATUS_OK;
}
-bool cli_smb_req_send(struct tevent_req *req)
+NTSTATUS cli_smb_req_send(struct tevent_req *req)
{
struct cli_smb_state *state = tevent_req_data(
req, struct cli_smb_state);
{
struct tevent_req *req;
struct iovec iov;
+ NTSTATUS status;
- iov.iov_base = CONST_DISCARD(char *, bytes);
+ iov.iov_base = discard_const_p(void, bytes);
iov.iov_len = num_bytes;
req = cli_smb_req_create(mem_ctx, ev, cli, smb_command,
if (req == NULL) {
return NULL;
}
- if (!cli_smb_req_send(req)) {
- TALLOC_FREE(req);
+
+ status = cli_smb_req_send(req);
+ if (!NT_STATUS_IS_OK(status)) {
+ tevent_req_nterror(req, status);
+ return tevent_req_post(req, ev);
}
return req;
}
nwritten = writev_recv(subreq, &err);
TALLOC_FREE(subreq);
if (nwritten == -1) {
- tevent_req_nterror(req, map_nt_error_from_unix(err));
+ NTSTATUS status = map_nt_error_from_unix(err);
+ cli_state_notify_pending(state->cli, status);
return;
}
- switch (CVAL(state->header, smb_com)) {
- case SMBtranss:
- case SMBtranss2:
- case SMBnttranss:
- case SMBntcancel:
+ if (state->one_way) {
state->inbuf = NULL;
tevent_req_done(req);
return;
- case SMBlockingX:
- if ((CVAL(state->header, smb_wct) == 8) &&
- (CVAL(state->vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
- state->inbuf = NULL;
- tevent_req_done(req);
- return;
- }
}
if (!cli_smb_req_set_pending(req)) {
{
struct cli_state *cli = tevent_req_callback_data(
subreq, struct cli_state);
- struct tevent_req *req;
- struct cli_smb_state *state;
- struct tevent_context *ev;
+ TALLOC_CTX *frame = talloc_stackframe();
NTSTATUS status;
uint8_t *inbuf;
ssize_t received;
- int num_pending;
- int i, err;
- uint16_t mid;
+ int err;
- received = read_smb_recv(subreq, talloc_tos(), &inbuf, &err);
+ if (subreq != cli->conn.read_smb_req) {
+ DEBUG(1, ("Internal error: cli_smb_received called with "
+ "unexpected subreq\n"));
+ status = NT_STATUS_INTERNAL_ERROR;
+ cli_state_notify_pending(cli, status);
+ TALLOC_FREE(frame);
+ return;
+ }
+
+ received = read_smb_recv(subreq, frame, &inbuf, &err);
TALLOC_FREE(subreq);
+ cli->conn.read_smb_req = NULL;
if (received == -1) {
status = map_nt_error_from_unix(err);
- goto fail;
+ cli_state_notify_pending(cli, status);
+ TALLOC_FREE(frame);
+ return;
}
+ status = cli->conn.dispatch_incoming(cli, frame, inbuf);
+ TALLOC_FREE(frame);
+ if (NT_STATUS_IS_OK(status)) {
+ /*
+ * We should not do any more processing
+ * as the dispatch function called
+ * tevent_req_done().
+ */
+ return;
+ } else if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
+ /*
+ * We got an error, so notify all pending requests
+ */
+ cli_state_notify_pending(cli, status);
+ return;
+ }
+
+ /*
+ * We got NT_STATUS_RETRY, so we may ask for a
+ * next incoming pdu.
+ */
+ if (!cli_state_receive_next(cli)) {
+ cli_state_notify_pending(cli, NT_STATUS_NO_MEMORY);
+ }
+}
+
+static NTSTATUS cli_state_dispatch_smb1(struct cli_state *cli,
+ TALLOC_CTX *frame,
+ uint8_t *inbuf)
+{
+ struct tevent_req *req;
+ struct cli_smb_state *state;
+ NTSTATUS status;
+ int num_pending;
+ int i;
+ uint16_t mid;
+ bool oplock_break;
+
if ((IVAL(inbuf, 4) != 0x424d53ff) /* 0xFF"SMB" */
&& (SVAL(inbuf, 4) != 0x45ff)) /* 0xFF"E" */ {
DEBUG(10, ("Got non-SMB PDU\n"));
- status = NT_STATUS_INVALID_NETWORK_RESPONSE;
- goto fail;
+ return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
if (cli_encryption_on(cli) && (CVAL(inbuf, 0) == 0)) {
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("get_enc_ctx_num returned %s\n",
nt_errstr(status)));
- goto fail;
+ return status;
}
if (enc_ctx_num != cli->trans_enc_state->enc_ctx_num) {
DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
enc_ctx_num,
cli->trans_enc_state->enc_ctx_num));
- status = NT_STATUS_INVALID_HANDLE;
- goto fail;
+ return NT_STATUS_INVALID_HANDLE;
}
status = common_decrypt_buffer(cli->trans_enc_state,
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("common_decrypt_buffer returned %s\n",
nt_errstr(status)));
- goto fail;
+ return status;
}
}
mid = SVAL(inbuf, smb_mid);
- num_pending = talloc_array_length(cli->pending);
+ num_pending = talloc_array_length(cli->conn.pending);
for (i=0; i<num_pending; i++) {
- if (mid == cli_smb_req_mid(cli->pending[i])) {
+ if (mid == cli_smb_req_mid(cli->conn.pending[i])) {
break;
}
}
if (i == num_pending) {
/* Dump unexpected reply */
- TALLOC_FREE(inbuf);
- goto done;
+ return NT_STATUS_RETRY;
}
- req = cli->pending[i];
+ oplock_break = false;
+
+ if (mid == 0xffff) {
+ /*
+ * Paranoia checks that this is really an oplock break request.
+ */
+ oplock_break = (smb_len(inbuf) == 51); /* hdr + 8 words */
+ oplock_break &= ((CVAL(inbuf, smb_flg) & FLAG_REPLY) == 0);
+ oplock_break &= (CVAL(inbuf, smb_com) == SMBlockingX);
+ oplock_break &= (SVAL(inbuf, smb_vwv6) == 0);
+ oplock_break &= (SVAL(inbuf, smb_vwv7) == 0);
+
+ if (!oplock_break) {
+ /* Dump unexpected reply */
+ return NT_STATUS_RETRY;
+ }
+ }
+
+ req = cli->conn.pending[i];
state = tevent_req_data(req, struct cli_smb_state);
- ev = state->ev;
- if (!cli_check_sign_mac(cli, (char *)inbuf, state->seqnum+1)) {
+ if (!oplock_break /* oplock breaks are not signed */
+ && !cli_check_sign_mac(cli, (char *)inbuf, state->seqnum+1)) {
DEBUG(10, ("cli_check_sign_mac failed\n"));
- TALLOC_FREE(inbuf);
- status = NT_STATUS_ACCESS_DENIED;
- goto fail;
+ return NT_STATUS_ACCESS_DENIED;
}
- if (state->chained_requests == NULL) {
- state->inbuf = talloc_move(state, &inbuf);
- talloc_set_destructor(req, NULL);
- cli_smb_req_destructor(req);
- tevent_req_done(req);
- } else {
- struct tevent_req **chain = talloc_move(
- talloc_tos(), &state->chained_requests);
+ if (state->chained_requests != NULL) {
+ struct tevent_req **chain = talloc_move(frame,
+ &state->chained_requests);
int num_chained = talloc_array_length(chain);
+ /*
+ * We steal the inbuf to the chain,
+ * so that it will stay until all
+ * requests of the chain are finished.
+ *
+ * Each requests in the chain will
+ * hold a talloc reference to the chain.
+ * This way we do not expose the talloc_reference()
+ * behavior to the callers.
+ */
+ talloc_steal(chain, inbuf);
+
for (i=0; i<num_chained; i++) {
- state = tevent_req_data(chain[i], struct
- cli_smb_state);
+ struct tevent_req **ref;
+
+ req = chain[i];
+ state = tevent_req_data(req, struct cli_smb_state);
+
+ cli_smb_req_unset_pending(req);
+
+ /*
+ * as we finish multiple requests here
+ * we need to defer the callbacks as
+ * they could destroy our current stack state.
+ */
+ tevent_req_defer_callback(req, state->ev);
+
+ ref = talloc_reference(state, chain);
+ if (tevent_req_nomem(ref, req)) {
+ continue;
+ }
+
state->inbuf = inbuf;
state->chain_num = i;
- tevent_req_done(chain[i]);
- }
- TALLOC_FREE(inbuf);
- TALLOC_FREE(chain);
- }
- done:
- if (talloc_array_length(cli->pending) > 0) {
- /*
- * Set up another read request for the other pending cli_smb
- * requests
- */
- state = tevent_req_data(cli->pending[0], struct cli_smb_state);
- subreq = read_smb_send(cli->pending, state->ev, cli->fd);
- if (subreq == NULL) {
- status = NT_STATUS_NO_MEMORY;
- goto fail;
+ state->chain_length = num_chained;
+
+ tevent_req_done(req);
}
- tevent_req_set_callback(subreq, cli_smb_received, cli);
+
+ return NT_STATUS_RETRY;
}
- return;
- fail:
- /*
- * Cancel all pending requests. We don't do a for-loop walking
- * cli->pending because that array changes in
- * cli_smb_req_destructor().
- */
- while (talloc_array_length(cli->pending) > 0) {
- req = cli->pending[0];
- talloc_set_destructor(req, NULL);
- cli_smb_req_destructor(req);
- tevent_req_nterror(req, status);
+
+ cli_smb_req_unset_pending(req);
+
+ state->inbuf = talloc_move(state, &inbuf);
+ state->chain_num = 0;
+ state->chain_length = 1;
+
+ if (talloc_array_length(cli->conn.pending) == 0) {
+ tevent_req_done(req);
+ return NT_STATUS_OK;
}
+
+ tevent_req_defer_callback(req, state->ev);
+ tevent_req_done(req);
+ return NT_STATUS_RETRY;
}
-NTSTATUS cli_smb_recv(struct tevent_req *req, uint8_t min_wct,
- uint8_t *pwct, uint16_t **pvwv,
+NTSTATUS cli_smb_recv(struct tevent_req *req,
+ TALLOC_CTX *mem_ctx, uint8_t **pinbuf,
+ uint8_t min_wct, uint8_t *pwct, uint16_t **pvwv,
uint32_t *pnum_bytes, uint8_t **pbytes)
{
struct cli_smb_state *state = tevent_req_data(
}
if (state->inbuf == NULL) {
+ if (min_wct != 0) {
+ return NT_STATUS_INVALID_NETWORK_RESPONSE;
+ }
+ if (pinbuf) {
+ *pinbuf = NULL;
+ }
+ if (pwct) {
+ *pwct = 0;
+ }
+ if (pvwv) {
+ *pvwv = NULL;
+ }
+ if (pnum_bytes) {
+ *pnum_bytes = 0;
+ }
+ if (pbytes) {
+ *pbytes = NULL;
+ }
/* This was a request without a reply */
return NT_STATUS_OK;
}
cmd = CVAL(state->inbuf, wct_ofs + 1);
}
- status = cli_pull_error((char *)state->inbuf);
-
- if (!have_andx_command((char *)state->inbuf, wct_ofs)
- && NT_STATUS_IS_ERR(status)) {
+ state->cli->raw_status = cli_pull_raw_error(state->inbuf);
+ if (NT_STATUS_IS_DOS(state->cli->raw_status)) {
+ uint8_t eclass = NT_STATUS_DOS_CLASS(state->cli->raw_status);
+ uint16_t ecode = NT_STATUS_DOS_CODE(state->cli->raw_status);
/*
- * The last command takes the error code. All further commands
- * down the requested chain will get a
- * NT_STATUS_REQUEST_ABORTED.
+ * TODO: is it really a good idea to do a mapping here?
+ *
+ * The old cli_pull_error() also does it, so I do not change
+ * the behavior yet.
*/
- return status;
+ status = dos_to_ntstatus(eclass, ecode);
+ } else {
+ status = state->cli->raw_status;
+ }
+
+ if (!have_andx_command((char *)state->inbuf, wct_ofs)) {
+
+ if ((cmd == SMBsesssetupX)
+ && NT_STATUS_EQUAL(
+ status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ /*
+ * NT_STATUS_MORE_PROCESSING_REQUIRED is a
+ * valid return code for session setup
+ */
+ goto no_err;
+ }
+
+ if (NT_STATUS_IS_ERR(status)) {
+ /*
+ * The last command takes the error code. All
+ * further commands down the requested chain
+ * will get a NT_STATUS_REQUEST_ABORTED.
+ */
+ return status;
+ }
}
+no_err:
+
wct = CVAL(state->inbuf, wct_ofs);
bytes_offset = wct_ofs + 1 + wct * sizeof(uint16_t);
num_bytes = SVAL(state->inbuf, bytes_offset);
if (pbytes != NULL) {
*pbytes = (uint8_t *)state->inbuf + bytes_offset + 2;
}
+ if ((mem_ctx != NULL) && (pinbuf != NULL)) {
+ if (state->chain_num == state->chain_length-1) {
+ *pinbuf = talloc_move(mem_ctx, &state->inbuf);
+ } else {
+ *pinbuf = state->inbuf;
+ }
+ }
- return NT_STATUS_OK;
+ return status;
}
size_t cli_smb_wct_ofs(struct tevent_req **reqs, int num_reqs)
return wct_ofs;
}
-bool cli_smb_chain_send(struct tevent_req **reqs, int num_reqs)
+NTSTATUS cli_smb_chain_send(struct tevent_req **reqs, int num_reqs)
{
struct cli_smb_state *first_state = tevent_req_data(
reqs[0], struct cli_smb_state);
int i, iovlen;
struct iovec *iov = NULL;
struct iovec *this_iov;
+ NTSTATUS status;
iovlen = 0;
for (i=0; i<num_reqs; i++) {
iov = talloc_array(last_state, struct iovec, iovlen);
if (iov == NULL) {
- goto fail;
+ return NT_STATUS_NO_MEMORY;
}
first_state->chained_requests = (struct tevent_req **)talloc_memdup(
last_state, reqs, sizeof(*reqs) * num_reqs);
if (first_state->chained_requests == NULL) {
- goto fail;
+ TALLOC_FREE(iov);
+ return NT_STATUS_NO_MEMORY;
}
wct_offset = smb_wct - 4;
if (i < num_reqs-1) {
if (!is_andx_req(CVAL(state->header, smb_com))
|| CVAL(state->header, smb_wct) < 2) {
- goto fail;
+ TALLOC_FREE(iov);
+ TALLOC_FREE(first_state->chained_requests);
+ return NT_STATUS_INVALID_PARAMETER;
}
}
* last byte.
*/
this_iov[0].iov_len = chain_padding+1;
- this_iov[0].iov_base = &state->header[
+ this_iov[0].iov_base = (void *)&state->header[
sizeof(state->header) - this_iov[0].iov_len];
memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
}
chain_padding = next_padding;
}
- if (!cli_smb_req_iov_send(reqs[0], last_state, iov, iovlen)) {
- goto fail;
+ status = cli_smb_req_iov_send(reqs[0], last_state, iov, iovlen);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(iov);
+ TALLOC_FREE(first_state->chained_requests);
+ return status;
}
- return true;
- fail:
- TALLOC_FREE(iov);
- return false;
+
+ return NT_STATUS_OK;
}
-uint8_t *cli_smb_inbuf(struct tevent_req *req)
+bool cli_has_async_calls(struct cli_state *cli)
{
- struct cli_smb_state *state = tevent_req_data(
- req, struct cli_smb_state);
- return state->inbuf;
+ return ((tevent_queue_length(cli->conn.outgoing) != 0)
+ || (talloc_array_length(cli->conn.pending) != 0));
}
-bool cli_has_async_calls(struct cli_state *cli)
+struct cli_smb_oplock_break_waiter_state {
+ uint16_t fnum;
+ uint8_t level;
+};
+
+static void cli_smb_oplock_break_waiter_done(struct tevent_req *subreq);
+
+struct tevent_req *cli_smb_oplock_break_waiter_send(TALLOC_CTX *mem_ctx,
+ struct event_context *ev,
+ struct cli_state *cli)
+{
+ struct tevent_req *req, *subreq;
+ struct cli_smb_oplock_break_waiter_state *state;
+ struct cli_smb_state *smb_state;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct cli_smb_oplock_break_waiter_state);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ /*
+ * Create a fake SMB request that we will never send out. This is only
+ * used to be set into the pending queue with the right mid.
+ */
+ subreq = cli_smb_req_create(mem_ctx, ev, cli, 0, 0, 0, NULL, 0, NULL);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
+ smb_state = tevent_req_data(subreq, struct cli_smb_state);
+ SSVAL(smb_state->header, smb_mid, 0xffff);
+
+ if (!cli_smb_req_set_pending(subreq)) {
+ tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
+ return tevent_req_post(req, ev);
+ }
+ tevent_req_set_callback(subreq, cli_smb_oplock_break_waiter_done, req);
+ return req;
+}
+
+static void cli_smb_oplock_break_waiter_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct cli_smb_oplock_break_waiter_state *state = tevent_req_data(
+ req, struct cli_smb_oplock_break_waiter_state);
+ uint8_t wct;
+ uint16_t *vwv;
+ uint32_t num_bytes;
+ uint8_t *bytes;
+ uint8_t *inbuf;
+ NTSTATUS status;
+
+ status = cli_smb_recv(subreq, state, &inbuf, 8, &wct, &vwv,
+ &num_bytes, &bytes);
+ TALLOC_FREE(subreq);
+ if (!NT_STATUS_IS_OK(status)) {
+ tevent_req_nterror(req, status);
+ return;
+ }
+ state->fnum = SVAL(vwv+2, 0);
+ state->level = CVAL(vwv+3, 1);
+ tevent_req_done(req);
+}
+
+NTSTATUS cli_smb_oplock_break_waiter_recv(struct tevent_req *req,
+ uint16_t *pfnum,
+ uint8_t *plevel)
+{
+ struct cli_smb_oplock_break_waiter_state *state = tevent_req_data(
+ req, struct cli_smb_oplock_break_waiter_state);
+ NTSTATUS status;
+
+ if (tevent_req_is_nterror(req, &status)) {
+ return status;
+ }
+ *pfnum = state->fnum;
+ *plevel = state->level;
+ return NT_STATUS_OK;
+}
+
+
+struct cli_session_request_state {
+ struct tevent_context *ev;
+ int sock;
+ uint32 len_hdr;
+ struct iovec iov[3];
+ uint8_t nb_session_response;
+};
+
+static void cli_session_request_sent(struct tevent_req *subreq);
+static void cli_session_request_recvd(struct tevent_req *subreq);
+
+struct tevent_req *cli_session_request_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ int sock,
+ const struct nmb_name *called,
+ const struct nmb_name *calling)
{
- return ((tevent_queue_length(cli->outgoing) != 0)
- || (talloc_array_length(cli->pending) != 0));
+ struct tevent_req *req, *subreq;
+ struct cli_session_request_state *state;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct cli_session_request_state);
+ if (req == NULL) {
+ return NULL;
+ }
+ state->ev = ev;
+ state->sock = sock;
+
+ state->iov[1].iov_base = name_mangle(
+ state, called->name, called->name_type);
+ if (tevent_req_nomem(state->iov[1].iov_base, req)) {
+ return tevent_req_post(req, ev);
+ }
+ state->iov[1].iov_len = name_len(
+ (unsigned char *)state->iov[1].iov_base,
+ talloc_get_size(state->iov[1].iov_base));
+
+ state->iov[2].iov_base = name_mangle(
+ state, calling->name, calling->name_type);
+ if (tevent_req_nomem(state->iov[2].iov_base, req)) {
+ return tevent_req_post(req, ev);
+ }
+ state->iov[2].iov_len = name_len(
+ (unsigned char *)state->iov[2].iov_base,
+ talloc_get_size(state->iov[2].iov_base));
+
+ _smb_setlen(((char *)&state->len_hdr),
+ state->iov[1].iov_len + state->iov[2].iov_len);
+ SCVAL((char *)&state->len_hdr, 0, 0x81);
+
+ state->iov[0].iov_base = &state->len_hdr;
+ state->iov[0].iov_len = sizeof(state->len_hdr);
+
+ subreq = writev_send(state, ev, NULL, sock, true, state->iov, 3);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
+ tevent_req_set_callback(subreq, cli_session_request_sent, req);
+ return req;
+}
+
+static void cli_session_request_sent(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct cli_session_request_state *state = tevent_req_data(
+ req, struct cli_session_request_state);
+ ssize_t ret;
+ int err;
+
+ ret = writev_recv(subreq, &err);
+ TALLOC_FREE(subreq);
+ if (ret == -1) {
+ tevent_req_error(req, err);
+ return;
+ }
+ subreq = read_smb_send(state, state->ev, state->sock);
+ if (tevent_req_nomem(subreq, req)) {
+ return;
+ }
+ tevent_req_set_callback(subreq, cli_session_request_recvd, req);
+}
+
+static void cli_session_request_recvd(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct cli_session_request_state *state = tevent_req_data(
+ req, struct cli_session_request_state);
+ uint8_t *buf;
+ ssize_t ret;
+ int err;
+
+ ret = read_smb_recv(subreq, talloc_tos(), &buf, &err);
+ TALLOC_FREE(subreq);
+
+ if (ret < 4) {
+ ret = -1;
+ err = EIO;
+ }
+ if (ret == -1) {
+ tevent_req_error(req, err);
+ return;
+ }
+ /*
+ * In case of an error there is more information in the data
+ * portion according to RFC1002. We're not subtle enough to
+ * respond to the different error conditions, so drop the
+ * error info here.
+ */
+ state->nb_session_response = CVAL(buf, 0);
+ tevent_req_done(req);
+}
+
+bool cli_session_request_recv(struct tevent_req *req, int *err, uint8_t *resp)
+{
+ struct cli_session_request_state *state = tevent_req_data(
+ req, struct cli_session_request_state);
+
+ if (tevent_req_is_unix_error(req, err)) {
+ return false;
+ }
+ *resp = state->nb_session_response;
+ return true;
}
git.samba.org / idra / samba.git / blobdiff