#include "includes.h"
/*
+ * Read an smb packet asynchronously, discard keepalives
+ */
+
+struct read_smb_state {
+ struct tevent_context *ev;
+ int fd;
+ uint8_t *buf;
+};
+
+static ssize_t read_smb_more(uint8_t *buf, size_t buflen, void *private_data);
+static void read_smb_done(struct tevent_req *subreq);
+
+static struct tevent_req *read_smb_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ int fd)
+{
+ struct tevent_req *result, *subreq;
+ struct read_smb_state *state;
+
+ result = tevent_req_create(mem_ctx, &state, struct read_smb_state);
+ if (result == NULL) {
+ return NULL;
+ }
+ state->ev = ev;
+ state->fd = fd;
+
+ subreq = read_packet_send(state, ev, fd, 4, read_smb_more, NULL);
+ if (subreq == NULL) {
+ goto fail;
+ }
+ tevent_req_set_callback(subreq, read_smb_done, result);
+ return result;
+ fail:
+ TALLOC_FREE(result);
+ return NULL;
+}
+
+static ssize_t read_smb_more(uint8_t *buf, size_t buflen, void *private_data)
+{
+ if (buflen > 4) {
+ return 0; /* We've been here, we're done */
+ }
+ return smb_len_large(buf);
+}
+
+static void read_smb_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct read_smb_state *state = tevent_req_data(
+ req, struct read_smb_state);
+ ssize_t len;
+ int err;
+
+ len = read_packet_recv(subreq, state, &state->buf, &err);
+ TALLOC_FREE(subreq);
+ if (len == -1) {
+ tevent_req_error(req, err);
+ return;
+ }
+
+ if (CVAL(state->buf, 0) == SMBkeepalive) {
+ subreq = read_packet_send(state, state->ev, state->fd, 4,
+ read_smb_more, NULL);
+ if (tevent_req_nomem(subreq, req)) {
+ return;
+ }
+ tevent_req_set_callback(subreq, read_smb_done, req);
+ return;
+ }
+ tevent_req_done(req);
+}
+
+static ssize_t read_smb_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+ uint8_t **pbuf, int *perrno)
+{
+ struct read_smb_state *state = tevent_req_data(
+ req, struct read_smb_state);
+
+ if (tevent_req_is_unix_error(req, perrno)) {
+ return -1;
+ }
+ *pbuf = talloc_move(mem_ctx, &state->buf);
+ return talloc_get_size(*pbuf);
+}
+
+/**
* 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)
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)
return;
}
-/*
- * Allocate a new mid
+/**
+ * Figure out if there is an andx command behind the current one
+ * @param[in] buf The smb buffer to look at
+ * @param[in] ofs The offset to the wct field that is followed by the cmd
+ * @retval Is there a command following?
*/
-static uint16_t cli_new_mid(struct cli_state *cli)
+static bool have_andx_command(const char *buf, uint16_t ofs)
+{
+ uint8_t wct;
+ size_t buflen = talloc_get_size(buf);
+
+ if ((ofs == buflen-1) || (ofs == buflen)) {
+ return false;
+ }
+
+ wct = CVAL(buf, ofs);
+ if (wct < 2) {
+ /*
+ * Not enough space for the command and a following pointer
+ */
+ return false;
+ }
+ return (CVAL(buf, ofs+1) != 0xff);
+}
+
+#define MAX_SMB_IOV 5
+
+struct cli_smb_state {
+ struct tevent_context *ev;
+ struct cli_state *cli;
+ uint8_t header[smb_wct+1]; /* Space for the header including the wct */
+
+ /*
+ * For normal requests, cli_smb_req_send chooses a mid. Secondary
+ * trans requests need to use the mid of the primary request, so we
+ * need a place to store it. Assume it's set if != 0.
+ */
+ uint16_t mid;
+
+ uint16_t *vwv;
+ uint8_t bytecount_buf[2];
+
+ struct iovec iov[MAX_SMB_IOV+3];
+ int iov_count;
+
+ uint8_t *inbuf;
+ uint32_t seqnum;
+ int chain_num;
+ struct tevent_req **chained_requests;
+};
+
+static uint16_t cli_alloc_mid(struct cli_state *cli)
{
+ int num_pending = talloc_array_length(cli->pending);
uint16_t result;
- struct cli_request *req;
while (true) {
+ int i;
+
result = cli->mid++;
- if (result == 0) {
+ if ((result == 0) || (result == 0xffff)) {
continue;
}
- for (req = cli->outstanding_requests; req; req = req->next) {
- if (result == req->mid) {
+ for (i=0; i<num_pending; i++) {
+ if (result == cli_smb_req_mid(cli->pending[i])) {
break;
}
}
- if (req == NULL) {
+ if (i == num_pending) {
return result;
}
}
}
-static char *cli_request_print(TALLOC_CTX *mem_ctx, struct async_req *req)
+void cli_smb_req_unset_pending(struct tevent_req *req)
{
- char *result = async_req_print(mem_ctx, req);
- struct cli_request *cli_req = cli_request_get(req);
+ 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 i;
- if (result == NULL) {
- return 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);
+ return;
}
- return talloc_asprintf_append_buffer(
- result, "mid=%d\n", cli_req->mid);
+ for (i=0; i<num_pending; i++) {
+ if (req == cli->pending[i]) {
+ break;
+ }
+ }
+ if (i == num_pending) {
+ /*
+ * Something's seriously broken. Just returning here is the
+ * right thing nevertheless, the point of this routine is to
+ * remove ourselves from cli->pending.
+ */
+ return;
+ }
+
+ /*
+ * Remove ourselves from the cli->pending array
+ */
+ if (num_pending > 1) {
+ cli->pending[i] = cli->pending[num_pending-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);
+ return;
}
-static int cli_request_destructor(struct cli_request *req)
+static int cli_smb_req_destructor(struct tevent_req *req)
{
- if (req->enc_state != NULL) {
- common_free_enc_buffer(req->enc_state, req->outbuf);
- }
- DLIST_REMOVE(req->cli->outstanding_requests, req);
+ cli_smb_req_unset_pending(req);
return 0;
}
+static void cli_smb_received(struct tevent_req *subreq);
+
+bool cli_smb_req_set_pending(struct tevent_req *req)
+{
+ struct cli_smb_state *state = tevent_req_data(
+ req, struct cli_smb_state);
+ 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);
+
+ pending = talloc_realloc(cli, cli->pending, struct tevent_req *,
+ num_pending+1);
+ if (pending == NULL) {
+ return false;
+ }
+ pending[num_pending] = req;
+ cli->pending = pending;
+ talloc_set_destructor(req, cli_smb_req_destructor);
+
+ if (num_pending > 0) {
+ return true;
+ }
+
+ /*
+ * 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);
+ return false;
+ }
+ tevent_req_set_callback(subreq, cli_smb_received, cli);
+ return true;
+}
+
/*
- * Create a fresh async smb request
+ * Fetch a smb request's mid. Only valid after the request has been sent by
+ * cli_smb_req_send().
*/
+uint16_t cli_smb_req_mid(struct tevent_req *req)
+{
+ struct cli_smb_state *state = tevent_req_data(
+ req, struct cli_smb_state);
+ return SVAL(state->header, smb_mid);
+}
-struct async_req *cli_request_new(TALLOC_CTX *mem_ctx,
- struct event_context *ev,
- struct cli_state *cli,
- uint8_t num_words, size_t num_bytes,
- struct cli_request **preq)
+void cli_smb_req_set_mid(struct tevent_req *req, uint16_t mid)
{
- struct async_req *result;
- struct cli_request *cli_req;
- size_t bufsize = smb_size + num_words * 2 + num_bytes;
+ struct cli_smb_state *state = tevent_req_data(
+ req, struct cli_smb_state);
+ state->mid = mid;
+}
- result = async_req_new(mem_ctx, ev);
- if (result == NULL) {
+static size_t iov_len(const struct iovec *iov, int count)
+{
+ size_t result = 0;
+ int i;
+ for (i=0; i<count; i++) {
+ result += iov[i].iov_len;
+ }
+ return result;
+}
+
+static uint8_t *iov_concat(TALLOC_CTX *mem_ctx, const struct iovec *iov,
+ int count)
+{
+ size_t len = iov_len(iov, count);
+ size_t copied;
+ uint8_t *buf;
+ int i;
+
+ buf = talloc_array(mem_ctx, uint8_t, len);
+ if (buf == NULL) {
return NULL;
}
+ copied = 0;
+ for (i=0; i<count; i++) {
+ memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
+ copied += iov[i].iov_len;
+ }
+ return buf;
+}
+
+struct tevent_req *cli_smb_req_create(TALLOC_CTX *mem_ctx,
+ struct event_context *ev,
+ struct cli_state *cli,
+ uint8_t smb_command,
+ uint8_t additional_flags,
+ uint8_t wct, uint16_t *vwv,
+ int iov_count,
+ struct iovec *bytes_iov)
+{
+ struct tevent_req *result;
+ struct cli_smb_state *state;
+ struct timeval endtime;
- cli_req = (struct cli_request *)talloc_size(
- result, sizeof(*cli_req) + bufsize);
- if (cli_req == NULL) {
- TALLOC_FREE(result);
+ if (iov_count > MAX_SMB_IOV) {
+ /*
+ * Should not happen :-)
+ */
return NULL;
}
- talloc_set_name_const(cli_req, "struct cli_request");
- result->private_data = cli_req;
- result->print = cli_request_print;
- cli_req->async = result;
- cli_req->cli = cli;
- cli_req->outbuf = ((char *)cli_req + sizeof(*cli_req));
- cli_req->sent = 0;
- cli_req->mid = cli_new_mid(cli);
- cli_req->inbuf = NULL;
- cli_req->enc_state = NULL;
+ result = tevent_req_create(mem_ctx, &state, struct cli_smb_state);
+ if (result == NULL) {
+ return NULL;
+ }
+ state->ev = ev;
+ state->cli = cli;
+ state->mid = 0; /* Set to auto-choose in cli_smb_req_send */
+ state->chain_num = 0;
+ state->chained_requests = NULL;
+
+ cli_setup_packet_buf(cli, (char *)state->header);
+ SCVAL(state->header, smb_com, smb_command);
+ SSVAL(state->header, smb_tid, cli->cnum);
+ SCVAL(state->header, smb_wct, wct);
- SCVAL(cli_req->outbuf, smb_wct, num_words);
- SSVAL(cli_req->outbuf, smb_vwv + num_words * 2, num_bytes);
+ state->vwv = vwv;
- DLIST_ADD_END(cli->outstanding_requests, cli_req,
- struct cli_request *);
- talloc_set_destructor(cli_req, cli_request_destructor);
+ SSVAL(state->bytecount_buf, 0, iov_len(bytes_iov, iov_count));
- DEBUG(10, ("cli_request_new: mid=%d\n", cli_req->mid));
+ state->iov[0].iov_base = (void *)state->header;
+ state->iov[0].iov_len = sizeof(state->header);
+ state->iov[1].iov_base = (void *)state->vwv;
+ state->iov[1].iov_len = wct * sizeof(uint16_t);
+ state->iov[2].iov_base = (void *)state->bytecount_buf;
+ state->iov[2].iov_len = sizeof(uint16_t);
+
+ if (iov_count != 0) {
+ memcpy(&state->iov[3], bytes_iov,
+ iov_count * sizeof(*bytes_iov));
+ }
+ state->iov_count = iov_count + 3;
- *preq = cli_req;
+ endtime = timeval_current_ofs(0, cli->timeout * 1000);
+ if (!tevent_req_set_endtime(result, ev, endtime)) {
+ tevent_req_nomem(NULL, result);
+ }
return result;
}
-/*
- * Convenience function to get the SMB part out of an async_req
- */
-
-struct cli_request *cli_request_get(struct async_req *req)
+static NTSTATUS cli_signv(struct cli_state *cli, struct iovec *iov, int count,
+ uint32_t *seqnum)
{
- if (req == NULL) {
- return NULL;
+ uint8_t *buf;
+
+ /*
+ * Obvious optimization: Make cli_calculate_sign_mac work with struct
+ * iovec directly. MD5Update would do that just fine.
+ */
+
+ if ((count <= 0) || (iov[0].iov_len < smb_wct)) {
+ return NT_STATUS_INVALID_PARAMETER;
}
- return talloc_get_type_abort(req->private_data, struct cli_request);
+
+ buf = iov_concat(talloc_tos(), iov, count);
+ if (buf == NULL) {
+ 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 NT_STATUS_OK;
}
-/*
- * A PDU has arrived on cli->evt_inbuf
- */
+static void cli_smb_sent(struct tevent_req *subreq);
-static void handle_incoming_pdu(struct cli_state *cli)
+static NTSTATUS cli_smb_req_iov_send(struct tevent_req *req,
+ struct cli_smb_state *state,
+ struct iovec *iov, int iov_count)
{
- struct cli_request *req;
- uint16_t mid;
- size_t raw_pdu_len, buf_len, pdu_len, rest_len;
- char *pdu;
+ struct tevent_req *subreq;
NTSTATUS status;
- /*
- * The encrypted PDU len might differ from the unencrypted one
- */
- raw_pdu_len = smb_len(cli->evt_inbuf) + 4;
- buf_len = talloc_get_size(cli->evt_inbuf);
- rest_len = buf_len - raw_pdu_len;
+ if (state->cli->fd == -1) {
+ return NT_STATUS_CONNECTION_INVALID;
+ }
- if (buf_len == raw_pdu_len) {
- /*
- * Optimal case: Exactly one PDU was in the socket buffer
- */
- pdu = cli->evt_inbuf;
- cli->evt_inbuf = NULL;
+ if (iov[0].iov_len < smb_wct) {
+ return NT_STATUS_INVALID_PARAMETER;
}
- else {
- DEBUG(11, ("buf_len = %d, raw_pdu_len = %d, splitting "
- "buffer\n", (int)buf_len, (int)raw_pdu_len));
- if (raw_pdu_len < rest_len) {
- /*
- * The PDU is shorter, talloc_memdup that one.
- */
- pdu = (char *)talloc_memdup(
- cli, cli->evt_inbuf, raw_pdu_len);
+ 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));
+ }
- memmove(cli->evt_inbuf, cli->evt_inbuf + raw_pdu_len,
- buf_len - raw_pdu_len);
+ smb_setlen((char *)iov[0].iov_base, iov_len(iov, iov_count) - 4);
- cli->evt_inbuf = TALLOC_REALLOC_ARRAY(
- NULL, cli->evt_inbuf, char, rest_len);
+ status = cli_signv(state->cli, iov, iov_count, &state->seqnum);
- if (pdu == NULL) {
- status = NT_STATUS_NO_MEMORY;
- goto invalidate_requests;
- }
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ if (cli_encryption_on(state->cli)) {
+ char *buf, *enc_buf;
+
+ buf = (char *)iov_concat(talloc_tos(), iov, iov_count);
+ if (buf == NULL) {
+ return NT_STATUS_NO_MEMORY;
}
- else {
- /*
- * The PDU is larger than the rest, talloc_memdup the
- * rest
- */
- pdu = cli->evt_inbuf;
+ status = cli_encrypt_message(state->cli, (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 status;
+ }
+ buf = (char *)talloc_memdup(state, enc_buf,
+ smb_len(enc_buf)+4);
+ SAFE_FREE(enc_buf);
+ if (buf == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ iov[0].iov_base = (void *)buf;
+ iov[0].iov_len = talloc_get_size(buf);
+ iov_count = 1;
+ }
+ subreq = writev_send(state, state->ev, state->cli->outgoing,
+ state->cli->fd, false, iov, iov_count);
+ if (subreq == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ tevent_req_set_callback(subreq, cli_smb_sent, req);
+ return NT_STATUS_OK;
+}
- cli->evt_inbuf = (char *)talloc_memdup(
- cli, pdu + raw_pdu_len, rest_len);
+NTSTATUS cli_smb_req_send(struct tevent_req *req)
+{
+ struct cli_smb_state *state = tevent_req_data(
+ req, struct cli_smb_state);
- if (cli->evt_inbuf == NULL) {
- status = NT_STATUS_NO_MEMORY;
- goto invalidate_requests;
- }
+ return cli_smb_req_iov_send(req, state, state->iov, state->iov_count);
+}
+
+struct tevent_req *cli_smb_send(TALLOC_CTX *mem_ctx,
+ struct event_context *ev,
+ struct cli_state *cli,
+ uint8_t smb_command,
+ uint8_t additional_flags,
+ uint8_t wct, uint16_t *vwv,
+ uint32_t num_bytes,
+ const uint8_t *bytes)
+{
+ struct tevent_req *req;
+ struct iovec iov;
+ NTSTATUS status;
+
+ iov.iov_base = CONST_DISCARD(void *, bytes);
+ iov.iov_len = num_bytes;
+
+ req = cli_smb_req_create(mem_ctx, ev, cli, smb_command,
+ additional_flags, wct, vwv, 1, &iov);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ 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;
+}
+
+static void cli_smb_sent(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct cli_smb_state *state = tevent_req_data(
+ req, struct cli_smb_state);
+ ssize_t nwritten;
+ int err;
+
+ nwritten = writev_recv(subreq, &err);
+ TALLOC_FREE(subreq);
+ if (nwritten == -1) {
+ if (state->cli->fd != -1) {
+ close(state->cli->fd);
+ state->cli->fd = -1;
}
+ tevent_req_nterror(req, map_nt_error_from_unix(err));
+ return;
+ }
+ switch (CVAL(state->header, smb_com)) {
+ case SMBtranss:
+ case SMBtranss2:
+ case SMBnttranss:
+ case SMBntcancel:
+ 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;
+ }
}
- /*
- * TODO: Handle oplock break requests
- */
+ if (!cli_smb_req_set_pending(req)) {
+ tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
+ return;
+ }
+}
- if (cli_encryption_on(cli) && CVAL(pdu, 0) == 0) {
+static void cli_smb_received(struct tevent_req *subreq)
+{
+ struct cli_state *cli = tevent_req_callback_data(
+ subreq, struct cli_state);
+ struct tevent_req *req;
+ struct cli_smb_state *state;
+ NTSTATUS status;
+ uint8_t *inbuf;
+ ssize_t received;
+ int num_pending;
+ int i, err;
+ uint16_t mid;
+ bool oplock_break;
+
+ received = read_smb_recv(subreq, talloc_tos(), &inbuf, &err);
+ TALLOC_FREE(subreq);
+ if (received == -1) {
+ if (cli->fd != -1) {
+ close(cli->fd);
+ cli->fd = -1;
+ }
+ status = map_nt_error_from_unix(err);
+ goto fail;
+ }
+
+ 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;
+ }
+
+ if (cli_encryption_on(cli) && (CVAL(inbuf, 0) == 0)) {
uint16_t enc_ctx_num;
- status = get_enc_ctx_num((uint8_t *)pdu, &enc_ctx_num);
+ status = get_enc_ctx_num(inbuf, &enc_ctx_num);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("get_enc_ctx_num returned %s\n",
nt_errstr(status)));
- goto invalidate_requests;
+ goto fail;
}
if (enc_ctx_num != cli->trans_enc_state->enc_ctx_num) {
enc_ctx_num,
cli->trans_enc_state->enc_ctx_num));
status = NT_STATUS_INVALID_HANDLE;
- goto invalidate_requests;
+ goto fail;
}
status = common_decrypt_buffer(cli->trans_enc_state,
- pdu);
+ (char *)inbuf);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("common_decrypt_buffer returned %s\n",
nt_errstr(status)));
- goto invalidate_requests;
+ goto fail;
}
}
- if (!cli_check_sign_mac(cli, pdu)) {
- DEBUG(10, ("cli_check_sign_mac failed\n"));
- status = NT_STATUS_ACCESS_DENIED;
- goto invalidate_requests;
- }
-
- mid = SVAL(pdu, smb_mid);
-
- DEBUG(10, ("handle_incoming_pdu: got mid %d\n", mid));
+ mid = SVAL(inbuf, smb_mid);
+ num_pending = talloc_array_length(cli->pending);
- for (req = cli->outstanding_requests; req; req = req->next) {
- if (req->mid == mid) {
+ for (i=0; i<num_pending; i++) {
+ if (mid == cli_smb_req_mid(cli->pending[i])) {
break;
}
}
-
- pdu_len = smb_len(pdu) + 4;
-
- if (req == NULL) {
- DEBUG(3, ("Request for mid %d not found, dumping PDU\n", mid));
-
- TALLOC_FREE(pdu);
- return;
+ if (i == num_pending) {
+ /* Dump unexpected reply */
+ TALLOC_FREE(inbuf);
+ goto done;
}
- req->inbuf = talloc_move(req, &pdu);
+ oplock_break = false;
- async_req_done(req->async);
- return;
+ 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 */
+ TALLOC_FREE(inbuf);
+ goto done;
+ }
+ }
- invalidate_requests:
+ req = cli->pending[i];
+ state = tevent_req_data(req, struct cli_smb_state);
- DEBUG(10, ("handle_incoming_pdu: Aborting with %s\n",
- nt_errstr(status)));
+ 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;
+ }
- for (req = cli->outstanding_requests; req; req = req->next) {
- async_req_error(req->async, status);
+ 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);
+ int num_chained = talloc_array_length(chain);
+
+ for (i=0; i<num_chained; i++) {
+ state = tevent_req_data(chain[i], struct
+ cli_smb_state);
+ 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;
+ }
+ tevent_req_set_callback(subreq, cli_smb_received, cli);
}
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);
+ }
}
-/*
- * fd event callback. This is the basic connection to the socket
- */
-
-static void cli_state_handler(struct event_context *event_ctx,
- struct fd_event *event, uint16 flags, void *p)
+NTSTATUS cli_smb_recv(struct tevent_req *req, uint8_t min_wct,
+ uint8_t *pwct, uint16_t **pvwv,
+ uint32_t *pnum_bytes, uint8_t **pbytes)
{
- struct cli_state *cli = (struct cli_state *)p;
- struct cli_request *req;
+ struct cli_smb_state *state = tevent_req_data(
+ req, struct cli_smb_state);
+ NTSTATUS status = NT_STATUS_OK;
+ uint8_t cmd, wct;
+ uint16_t num_bytes;
+ size_t wct_ofs, bytes_offset;
+ int i;
+
+ if (tevent_req_is_nterror(req, &status)) {
+ return status;
+ }
- DEBUG(11, ("cli_state_handler called with flags %d\n", flags));
+ if (state->inbuf == NULL) {
+ /* This was a request without a reply */
+ return NT_STATUS_OK;
+ }
- if (flags & EVENT_FD_READ) {
- int res, available;
- size_t old_size, new_size;
- char *tmp;
+ wct_ofs = smb_wct;
+ cmd = CVAL(state->inbuf, smb_com);
- res = ioctl(cli->fd, FIONREAD, &available);
- if (res == -1) {
- DEBUG(10, ("ioctl(FIONREAD) failed: %s\n",
- strerror(errno)));
- goto sock_error;
+ for (i=0; i<state->chain_num; i++) {
+ if (i < state->chain_num-1) {
+ if (cmd == 0xff) {
+ return NT_STATUS_REQUEST_ABORTED;
+ }
+ if (!is_andx_req(cmd)) {
+ return NT_STATUS_INVALID_NETWORK_RESPONSE;
+ }
}
- if (available == 0) {
- /* EOF */
- goto sock_error;
+ if (!have_andx_command((char *)state->inbuf, wct_ofs)) {
+ /*
+ * This request was not completed because a previous
+ * request in the chain had received an error.
+ */
+ return NT_STATUS_REQUEST_ABORTED;
}
- old_size = talloc_get_size(cli->evt_inbuf);
- new_size = old_size + available;
+ wct_ofs = SVAL(state->inbuf, wct_ofs + 3);
- if (new_size < old_size) {
- /* wrap */
- goto sock_error;
- }
+ /*
+ * Skip the all-present length field. No overflow, we've just
+ * put a 16-bit value into a size_t.
+ */
+ wct_ofs += 4;
- tmp = TALLOC_REALLOC_ARRAY(cli, cli->evt_inbuf, char,
- new_size);
- if (tmp == NULL) {
- /* nomem */
- goto sock_error;
+ if (wct_ofs+2 > talloc_get_size(state->inbuf)) {
+ return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
- cli->evt_inbuf = tmp;
- res = recv(cli->fd, cli->evt_inbuf + old_size, available, 0);
- if (res == -1) {
- DEBUG(10, ("recv failed: %s\n", strerror(errno)));
- goto sock_error;
- }
+ cmd = CVAL(state->inbuf, wct_ofs + 1);
+ }
- DEBUG(11, ("cli_state_handler: received %d bytes, "
- "smb_len(evt_inbuf) = %d\n", (int)res,
- smb_len(cli->evt_inbuf)));
+ status = cli_pull_error((char *)state->inbuf);
- /* recv *might* have returned less than announced */
- new_size = old_size + res;
+ if (!have_andx_command((char *)state->inbuf, wct_ofs)) {
- /* shrink, so I don't expect errors here */
- cli->evt_inbuf = TALLOC_REALLOC_ARRAY(cli, cli->evt_inbuf,
- char, new_size);
+ 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;
+ }
- while ((cli->evt_inbuf != NULL)
- && ((smb_len(cli->evt_inbuf) + 4) <= new_size)) {
+ if (NT_STATUS_IS_ERR(status)) {
/*
- * we've got a complete NBT level PDU in evt_inbuf
+ * The last command takes the error code. All
+ * further commands down the requested chain
+ * will get a NT_STATUS_REQUEST_ABORTED.
*/
- handle_incoming_pdu(cli);
- new_size = talloc_get_size(cli->evt_inbuf);
+ return status;
}
}
- if (flags & EVENT_FD_WRITE) {
- size_t to_send;
- ssize_t sent;
+no_err:
- for (req = cli->outstanding_requests; req; req = req->next) {
- to_send = smb_len(req->outbuf)+4;
- if (to_send > req->sent) {
- break;
- }
- }
+ wct = CVAL(state->inbuf, wct_ofs);
+ bytes_offset = wct_ofs + 1 + wct * sizeof(uint16_t);
+ num_bytes = SVAL(state->inbuf, bytes_offset);
- if (req == NULL) {
- event_fd_set_not_writeable(event);
- return;
- }
+ if (wct < min_wct) {
+ return NT_STATUS_INVALID_NETWORK_RESPONSE;
+ }
+
+ /*
+ * wct_ofs is a 16-bit value plus 4, wct is a 8-bit value, num_bytes
+ * is a 16-bit value. So bytes_offset being size_t should be far from
+ * wrapping.
+ */
+ if ((bytes_offset + 2 > talloc_get_size(state->inbuf))
+ || (bytes_offset > 0xffff)) {
+ return NT_STATUS_INVALID_NETWORK_RESPONSE;
+ }
+
+ if (pwct != NULL) {
+ *pwct = wct;
+ }
+ if (pvwv != NULL) {
+ *pvwv = (uint16_t *)(state->inbuf + wct_ofs + 1);
+ }
+ if (pnum_bytes != NULL) {
+ *pnum_bytes = num_bytes;
+ }
+ if (pbytes != NULL) {
+ *pbytes = (uint8_t *)state->inbuf + bytes_offset + 2;
+ }
+
+ return status;
+}
+
+size_t cli_smb_wct_ofs(struct tevent_req **reqs, int num_reqs)
+{
+ size_t wct_ofs;
+ int i;
+
+ wct_ofs = smb_wct - 4;
+
+ for (i=0; i<num_reqs; i++) {
+ struct cli_smb_state *state;
+ state = tevent_req_data(reqs[i], struct cli_smb_state);
+ wct_ofs += iov_len(state->iov+1, state->iov_count-1);
+ wct_ofs = (wct_ofs + 3) & ~3;
+ }
+ return wct_ofs;
+}
+
+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);
+ struct cli_smb_state *last_state = tevent_req_data(
+ reqs[num_reqs-1], struct cli_smb_state);
+ struct cli_smb_state *state;
+ size_t wct_offset;
+ size_t chain_padding = 0;
+ int i, iovlen;
+ struct iovec *iov = NULL;
+ struct iovec *this_iov;
+ NTSTATUS status;
+
+ iovlen = 0;
+ for (i=0; i<num_reqs; i++) {
+ state = tevent_req_data(reqs[i], struct cli_smb_state);
+ iovlen += state->iov_count;
+ }
+
+ iov = talloc_array(last_state, struct iovec, iovlen);
+ if (iov == NULL) {
+ 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) {
+ TALLOC_FREE(iov);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ wct_offset = smb_wct - 4;
+ this_iov = iov;
+
+ for (i=0; i<num_reqs; i++) {
+ size_t next_padding = 0;
+ uint16_t *vwv;
- sent = send(cli->fd, req->outbuf + req->sent,
- to_send - req->sent, 0);
+ state = tevent_req_data(reqs[i], struct cli_smb_state);
- if (sent < 0) {
- goto sock_error;
+ if (i < num_reqs-1) {
+ if (!is_andx_req(CVAL(state->header, smb_com))
+ || CVAL(state->header, smb_wct) < 2) {
+ TALLOC_FREE(iov);
+ TALLOC_FREE(first_state->chained_requests);
+ return NT_STATUS_INVALID_PARAMETER;
+ }
}
- req->sent += sent;
+ wct_offset += iov_len(state->iov+1, state->iov_count-1) + 1;
+ if ((wct_offset % 4) != 0) {
+ next_padding = 4 - (wct_offset % 4);
+ }
+ wct_offset += next_padding;
+ vwv = state->vwv;
+
+ if (i < num_reqs-1) {
+ struct cli_smb_state *next_state = tevent_req_data(
+ reqs[i+1], struct cli_smb_state);
+ SCVAL(vwv+0, 0, CVAL(next_state->header, smb_com));
+ SCVAL(vwv+0, 1, 0);
+ SSVAL(vwv+1, 0, wct_offset);
+ } else if (is_andx_req(CVAL(state->header, smb_com))) {
+ /* properly end the chain */
+ SCVAL(vwv+0, 0, 0xff);
+ SCVAL(vwv+0, 1, 0xff);
+ SSVAL(vwv+1, 0, 0);
+ }
- if (req->sent == to_send) {
- return;
+ if (i == 0) {
+ this_iov[0] = state->iov[0];
+ } else {
+ /*
+ * This one is a bit subtle. We have to add
+ * chain_padding bytes between the requests, and we
+ * have to also include the wct field of the
+ * subsequent requests. We use the subsequent header
+ * for the padding, it contains the wct field in its
+ * last byte.
+ */
+ this_iov[0].iov_len = chain_padding+1;
+ 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);
}
+ memcpy(this_iov+1, state->iov+1,
+ sizeof(struct iovec) * (state->iov_count-1));
+ this_iov += state->iov_count;
+ chain_padding = next_padding;
}
- return;
- sock_error:
- for (req = cli->outstanding_requests; req; req = req->next) {
- req->async->state = ASYNC_REQ_ERROR;
- req->async->status = map_nt_error_from_unix(errno);
+ 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;
}
- TALLOC_FREE(cli->fd_event);
- close(cli->fd);
- cli->fd = -1;
+
+ return NT_STATUS_OK;
}
-/*
- * Holder for a talloc_destructor, we need to zero out the pointers in cli
- * when deleting
- */
-struct cli_tmp_event {
- struct cli_state *cli;
-};
+uint8_t *cli_smb_inbuf(struct tevent_req *req)
+{
+ struct cli_smb_state *state = tevent_req_data(
+ req, struct cli_smb_state);
+ return state->inbuf;
+}
-static int cli_tmp_event_destructor(struct cli_tmp_event *e)
+bool cli_has_async_calls(struct cli_state *cli)
{
- TALLOC_FREE(e->cli->fd_event);
- TALLOC_FREE(e->cli->event_ctx);
- return 0;
+ return ((tevent_queue_length(cli->outgoing) != 0)
+ || (talloc_array_length(cli->pending) != 0));
}
-/*
- * Create a temporary event context for use in the sync helper functions
- */
+struct cli_smb_oplock_break_waiter_state {
+ uint16_t fnum;
+ uint8_t level;
+};
-struct cli_tmp_event *cli_tmp_event_ctx(TALLOC_CTX *mem_ctx,
- struct cli_state *cli)
+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 cli_tmp_event *state;
+ struct tevent_req *req, *subreq;
+ struct cli_smb_oplock_break_waiter_state *state;
+ struct cli_smb_state *smb_state;
- if (cli->event_ctx != NULL) {
+ req = tevent_req_create(mem_ctx, &state,
+ struct cli_smb_oplock_break_waiter_state);
+ if (req == NULL) {
return NULL;
}
- state = talloc(mem_ctx, struct cli_tmp_event);
- if (state == 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);
}
- state->cli = cli;
- talloc_set_destructor(state, cli_tmp_event_destructor);
+ smb_state = tevent_req_data(subreq, struct cli_smb_state);
+ SSVAL(smb_state->header, smb_mid, 0xffff);
- cli->event_ctx = event_context_init(state);
- if (cli->event_ctx == NULL) {
- TALLOC_FREE(state);
- return NULL;
+ 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;
+}
- cli->fd_event = event_add_fd(cli->event_ctx, state, cli->fd,
- EVENT_FD_READ, cli_state_handler, cli);
- if (cli->fd_event == NULL) {
- TALLOC_FREE(state);
- return NULL;
+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;
+ NTSTATUS status;
+
+ status = cli_smb_recv(subreq, 8, &wct, &vwv, &num_bytes, &bytes);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(subreq);
+ tevent_req_nterror(req, status);
+ return;
}
- return state;
+ state->fnum = SVAL(vwv+2, 0);
+ state->level = CVAL(vwv+3, 1);
+ tevent_req_done(req);
}
-/*
- * Attach an event context permanently to a cli_struct
- */
-
-NTSTATUS cli_add_event_ctx(struct cli_state *cli,
- struct event_context *event_ctx)
+NTSTATUS cli_smb_oplock_break_waiter_recv(struct tevent_req *req,
+ uint16_t *pfnum,
+ uint8_t *plevel)
{
- cli->event_ctx = event_ctx;
- cli->fd_event = event_add_fd(event_ctx, cli, cli->fd, EVENT_FD_READ,
- cli_state_handler, cli);
- if (cli->fd_event == NULL) {
- return NT_STATUS_NO_MEMORY;
+ 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;
}
git.samba.org / ira / wip.git / blobdiff