#include "includes.h"
#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 "../libcli/smb/smb_seal.h"
-#include "libsmb/nmblib.h"
-#include "../libcli/smb/read_smb.h"
+#include "../libcli/smb/smbXcli_base.h"
-static NTSTATUS cli_pull_raw_error(const uint8_t *buf)
-{
- const uint8_t *hdr = buf + NBT_HDR_SIZE;
- uint32_t flags2 = SVAL(hdr, HDR_FLG2);
- NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
-
- if (NT_STATUS_IS_OK(status)) {
- return NT_STATUS_OK;
- }
-
- if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
- return status;
- }
-
- return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
-}
-
-/**
- * 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 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_smb_req_state {
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;
- int chain_length;
- struct tevent_req **chained_requests;
-
- bool one_way;
+ uint8_t smb_command;
+ struct tevent_req *req;
+ struct cli_smb_req_state **ptr;
};
-static uint16_t cli_alloc_mid(struct cli_state *cli)
-{
- int num_pending = talloc_array_length(cli->conn.pending);
- uint16_t result;
-
- while (true) {
- int i;
-
- result = cli->conn.smb1.mid++;
- if ((result == 0) || (result == 0xffff)) {
- continue;
- }
-
- for (i=0; i<num_pending; i++) {
- if (result == cli_smb_req_mid(cli->conn.pending[i])) {
- break;
- }
- }
-
- if (i == num_pending) {
- return result;
- }
- }
-}
-
-void cli_smb_req_unset_pending(struct tevent_req *req)
+static int cli_smb_req_state_destructor(struct cli_smb_req_state *state)
{
- 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->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->conn.pending);
- cli->conn.read_smb_req = NULL;
- return;
- }
-
- for (i=0; i<num_pending; i++) {
- if (req == cli->conn.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->conn.pending.
- */
- return;
- }
-
- /*
- * Remove ourselves from the cli->conn.pending array
- */
- 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->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);
+ talloc_set_destructor(state->ptr, NULL);
+ talloc_free(state->ptr);
return 0;
}
-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_smb_state *state = tevent_req_data(
- req, struct cli_smb_state);
- struct cli_state *cli;
- struct tevent_req **pending;
- int num_pending;
-
- cli = state->cli;
- num_pending = talloc_array_length(cli->conn.pending);
-
- pending = talloc_realloc(cli, cli->conn.pending, struct tevent_req *,
- num_pending+1);
- if (pending == NULL) {
- return false;
- }
- pending[num_pending] = req;
- cli->conn.pending = pending;
- talloc_set_destructor(req, cli_smb_req_destructor);
-
- 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
- */
- 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(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);
-
- /*
- * We're dead. No point waiting for trans2
- * replies.
- */
- state->mid = 0;
-
- 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().
- */
-uint16_t cli_smb_req_mid(struct tevent_req *req)
-{
- struct cli_smb_state *state = tevent_req_data(
- req, struct cli_smb_state);
-
- if (state->mid != 0) {
- return state->mid;
- }
-
- return SVAL(state->header, smb_mid);
-}
-
-void cli_smb_req_set_mid(struct tevent_req *req, uint16_t mid)
-{
- struct cli_smb_state *state = tevent_req_data(
- req, struct cli_smb_state);
- state->mid = mid;
-}
-
-uint32_t cli_smb_req_seqnum(struct tevent_req *req)
+static int cli_smb_req_state_ptr_destructor(struct cli_smb_req_state **ptr)
{
- struct cli_smb_state *state = tevent_req_data(
- req, struct cli_smb_state);
- return state->seqnum;
-}
+ struct cli_smb_req_state *state = *ptr;
+ void *parent = talloc_parent(state);
-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;
-}
+ talloc_set_destructor(state, 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;
+ talloc_reparent(state, parent, state->req);
+ talloc_free(state);
+ return 0;
}
struct tevent_req *cli_smb_req_create(TALLOC_CTX *mem_ctx,
struct cli_state *cli,
uint8_t smb_command,
uint8_t additional_flags,
+ uint16_t additional_flags2,
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;
+ struct cli_smb_req_state *state;
+ uint8_t clear_flags = 0;
+ uint16_t clear_flags2 = 0;
- if (iov_count > MAX_SMB_IOV) {
- /*
- * Should not happen :-)
- */
+ state = talloc_zero(mem_ctx, struct cli_smb_req_state);
+ if (state == NULL) {
return 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->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 = (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;
-
- if (cli->timeout) {
- endtime = timeval_current_ofs_msec(cli->timeout);
- if (!tevent_req_set_endtime(result, ev, endtime)) {
- return 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 NTSTATUS cli_signv(struct cli_state *cli, struct iovec *iov, int count,
- uint32_t *seqnum)
-{
- 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;
- }
-
- 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;
-}
-
-static void cli_smb_sent(struct tevent_req *subreq);
-
-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_DISCONNECTED;
- }
-
- if (iov[0].iov_len < smb_wct) {
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- if (state->mid != 0) {
- SSVAL(iov[0].iov_base, smb_mid, state->mid);
- } else {
- uint16_t mid = cli_alloc_mid(state->cli);
- SSVAL(iov[0].iov_base, smb_mid, mid);
- }
-
- smb_setlen_nbt((char *)iov[0].iov_base, iov_len(iov, iov_count) - 4);
-
- status = cli_signv(state->cli, iov, iov_count, &state->seqnum);
-
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- if (cli_state_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;
- }
- 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 status;
- }
- buf = (char *)talloc_memdup(state, enc_buf,
- smb_len_nbt(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;
+ state->smb_command = smb_command;
+ state->ptr = talloc(state, struct cli_smb_req_state *);
+ if (state->ptr == NULL) {
+ talloc_free(state);
+ return NULL;
}
- subreq = writev_send(state, state->ev, state->cli->conn.outgoing,
- state->cli->conn.fd, false, iov, iov_count);
- if (subreq == NULL) {
- return NT_STATUS_NO_MEMORY;
+ *state->ptr = state;
+
+ state->req = smb1cli_req_create(state, ev, cli->conn, smb_command,
+ additional_flags, clear_flags,
+ additional_flags2, clear_flags2,
+ cli->timeout,
+ cli->smb1.pid,
+ cli->smb1.tcon,
+ cli->smb1.session,
+ wct, vwv, iov_count, bytes_iov);
+ if (state->req == NULL) {
+ talloc_free(state);
+ return NULL;
}
- tevent_req_set_callback(subreq, cli_smb_sent, req);
- return NT_STATUS_OK;
-}
-NTSTATUS cli_smb_req_send(struct tevent_req *req)
-{
- struct cli_smb_state *state = tevent_req_data(
- req, struct cli_smb_state);
-
- if (!tevent_req_is_in_progress(req)) {
- return NT_STATUS_INTERNAL_ERROR;
- }
+ talloc_reparent(state, state->req, state->ptr);
+ talloc_set_destructor(state, cli_smb_req_state_destructor);
+ talloc_set_destructor(state->ptr, cli_smb_req_state_ptr_destructor);
- return cli_smb_req_iov_send(req, state, state->iov, state->iov_count);
+ return state->req;
}
struct tevent_req *cli_smb_send(TALLOC_CTX *mem_ctx,
struct cli_state *cli,
uint8_t smb_command,
uint8_t additional_flags,
+ uint16_t additional_flags2,
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 = discard_const_p(void, bytes);
- iov.iov_len = num_bytes;
+ struct cli_smb_req_state *state;
+ uint8_t clear_flags = 0;
+ uint16_t clear_flags2 = 0;
- req = cli_smb_req_create(mem_ctx, ev, cli, smb_command,
- additional_flags, wct, vwv, 1, &iov);
- if (req == NULL) {
+ state = talloc_zero(mem_ctx, struct cli_smb_req_state);
+ if (state == NULL) {
return NULL;
}
- if (!tevent_req_is_in_progress(req)) {
- return tevent_req_post(req, ev);
- }
- 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) {
- NTSTATUS status = map_nt_error_from_unix_common(err);
- cli_state_notify_pending(state->cli, status);
- return;
- }
-
- if (state->one_way) {
- state->inbuf = NULL;
- tevent_req_done(req);
- return;
- }
-
- if (!cli_smb_req_set_pending(req)) {
- tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
- return;
- }
-}
-
-static void cli_smb_received(struct tevent_req *subreq)
-{
- struct cli_state *cli = tevent_req_callback_data(
- subreq, struct cli_state);
- TALLOC_CTX *frame = talloc_stackframe();
- NTSTATUS status;
- uint8_t *inbuf;
- ssize_t received;
- int 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_common(err);
- 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;
- const uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
-
- if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
- && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
- DEBUG(10, ("Got non-SMB PDU\n"));
- return NT_STATUS_INVALID_NETWORK_RESPONSE;
- }
-
- if (cli_state_encryption_on(cli) && (CVAL(inbuf, 0) == 0)) {
- uint16_t 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)));
- 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));
- return NT_STATUS_INVALID_HANDLE;
- }
-
- status = common_decrypt_buffer(cli->trans_enc_state,
- (char *)inbuf);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(10, ("common_decrypt_buffer returned %s\n",
- nt_errstr(status)));
- return status;
- }
- }
-
- mid = SVAL(inhdr, HDR_MID);
- num_pending = talloc_array_length(cli->conn.pending);
-
- for (i=0; i<num_pending; i++) {
- if (mid == cli_smb_req_mid(cli->conn.pending[i])) {
- break;
- }
- }
- if (i == num_pending) {
- /* Dump unexpected reply */
- return NT_STATUS_RETRY;
- }
-
- oplock_break = false;
-
- if (mid == 0xffff) {
- /*
- * Paranoia checks that this is really an oplock break request.
- */
- oplock_break = (smb_len_nbt(inbuf) == 51); /* hdr + 8 words */
- oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
- oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
- oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
- oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 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);
-
- 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"));
- return NT_STATUS_ACCESS_DENIED;
+ state->cli = cli;
+ state->smb_command = smb_command;
+ state->ptr = talloc(state, struct cli_smb_req_state *);
+ if (state->ptr == NULL) {
+ talloc_free(state);
+ return NULL;
}
-
- 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++) {
- 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;
- state->chain_length = num_chained;
-
- tevent_req_done(req);
- }
-
- return NT_STATUS_RETRY;
+ *state->ptr = state;
+
+ state->req = smb1cli_req_send(state, ev, cli->conn, smb_command,
+ additional_flags, clear_flags,
+ additional_flags2, clear_flags2,
+ cli->timeout,
+ cli->smb1.pid,
+ cli->smb1.tcon,
+ cli->smb1.session,
+ wct, vwv, num_bytes, bytes);
+ if (state->req == NULL) {
+ talloc_free(state);
+ return NULL;
}
- cli_smb_req_unset_pending(req);
-
- state->inbuf = talloc_move(state, &inbuf);
- state->chain_num = 0;
- state->chain_length = 1;
+ talloc_reparent(state, state->req, state->ptr);
+ talloc_set_destructor(state, cli_smb_req_state_destructor);
+ talloc_set_destructor(state->ptr, cli_smb_req_state_ptr_destructor);
- 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;
+ return state->req;
}
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_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;
+ NTSTATUS status;
+ void *parent = talloc_parent(req);
+ struct cli_smb_req_state *state =
+ talloc_get_type(parent,
+ struct cli_smb_req_state);
+ struct iovec *recv_iov = NULL;
+ uint8_t wct = 0;
+ uint16_t *vwv = NULL;
+ uint32_t num_bytes;
+ uint8_t *bytes = NULL;
+ uint8_t *inbuf;
+ bool is_expected = false;
+ bool map_dos_errors = true;
- if (tevent_req_is_nterror(req, &status)) {
- return status;
+ if (pinbuf != NULL) {
+ *pinbuf = NULL;
}
-
- 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;
+ if (pwct != NULL) {
+ *pwct = 0;
}
-
- wct_ofs = smb_wct;
- cmd = CVAL(state->inbuf, smb_com);
-
- 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 (!have_andx_command((char *)state->inbuf, wct_ofs)) {
+ if (pvwv != NULL) {
+ *pvwv = NULL;
+ }
+ if (pnum_bytes != NULL) {
+ *pnum_bytes = 0;
+ }
+ if (pbytes != NULL) {
+ *pbytes = NULL;
+ }
+
+ status = smb1cli_req_recv(req, req,
+ &recv_iov,
+ NULL, /* phdr */
+ &wct,
+ &vwv,
+ NULL, /* pvwv_offset */
+ &num_bytes,
+ &bytes,
+ NULL, /* pbytes_offset */
+ &inbuf,
+ NULL, 0); /* expected */
+
+ if (state) {
+ if ((state->smb_command == SMBsesssetupX) &&
+ NT_STATUS_EQUAL(status,
+ NT_STATUS_MORE_PROCESSING_REQUIRED)) {
/*
- * This request was not completed because a previous
- * request in the chain had received an error.
+ * NT_STATUS_MORE_PROCESSING_REQUIRED is a
+ * valid return code for session setup
*/
- return NT_STATUS_REQUEST_ABORTED;
+ is_expected = true;
}
- cmd = CVAL(state->inbuf, wct_ofs + 1);
- wct_ofs = SVAL(state->inbuf, wct_ofs + 3);
-
- /*
- * Skip the all-present length field. No overflow, we've just
- * put a 16-bit value into a size_t.
- */
- wct_ofs += 4;
-
- if (wct_ofs+2 > talloc_get_size(state->inbuf)) {
- return NT_STATUS_INVALID_NETWORK_RESPONSE;
- }
+ map_dos_errors = state->cli->map_dos_errors;
+ state->cli->raw_status = status;
+ talloc_free(state->ptr);
+ state = NULL;
}
- 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);
+ if (NT_STATUS_IS_DOS(status) && map_dos_errors) {
+ uint8_t eclass = NT_STATUS_DOS_CLASS(status);
+ uint16_t ecode = NT_STATUS_DOS_CODE(status);
/*
* TODO: is it really a good idea to do a mapping here?
*
* the behavior yet.
*/
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;
- }
+ if (!NT_STATUS_IS_ERR(status)) {
+ is_expected = true;
}
-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 (wct < min_wct) {
- return NT_STATUS_INVALID_NETWORK_RESPONSE;
+ if (!is_expected) {
+ TALLOC_FREE(recv_iov);
+ return status;
}
- /*
- * 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)) {
+ if (wct < min_wct) {
+ TALLOC_FREE(recv_iov);
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
*pwct = wct;
}
if (pvwv != NULL) {
- *pvwv = (uint16_t *)(state->inbuf + wct_ofs + 1);
+ *pvwv = vwv;
}
if (pnum_bytes != NULL) {
*pnum_bytes = num_bytes;
}
if (pbytes != NULL) {
- *pbytes = (uint8_t *)state->inbuf + bytes_offset + 2;
+ *pbytes = bytes;
}
- 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 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++) {
- if (!tevent_req_is_in_progress(reqs[i])) {
- return NT_STATUS_INTERNAL_ERROR;
- }
-
- 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;
-
- state = tevent_req_data(reqs[i], struct cli_smb_state);
-
- 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;
- }
- }
-
- 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 (i == 0) {
- this_iov[0] = state->iov[0];
+ if (pinbuf != NULL && mem_ctx != NULL) {
+ if (talloc_reference_count(inbuf) == 0) {
+ *pinbuf = talloc_move(mem_ctx, &inbuf);
+ TALLOC_FREE(recv_iov);
} 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);
+ *pinbuf = inbuf;
+ }
+ } else if (mem_ctx != NULL) {
+ if (talloc_reference_count(inbuf) == 0) {
+ (void)talloc_move(mem_ctx, &inbuf);
+ TALLOC_FREE(recv_iov);
}
- memcpy(this_iov+1, state->iov+1,
- sizeof(struct iovec) * (state->iov_count-1));
- this_iov += state->iov_count;
- chain_padding = next_padding;
- }
-
- 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;
- }
-
- for (i=0; i < (num_reqs - 1); i++) {
- state = tevent_req_data(reqs[i], struct cli_smb_state);
-
- state->seqnum = last_state->seqnum;
}
- return NT_STATUS_OK;
-}
-
-bool cli_has_async_calls(struct cli_state *cli)
-{
- return ((tevent_queue_length(cli->conn.outgoing) != 0)
- || (talloc_array_length(cli->conn.pending) != 0));
+ return status;
}
git.samba.org / metze / samba / wip.git / blobdiff