diff options
Diffstat (limited to 'source3/libsmb/async_smb.c')
| -rw-r--r-- | source3/libsmb/async_smb.c | 1321 |
1 files changed, 164 insertions, 1157 deletions
diff --git a/source3/libsmb/async_smb.c b/source3/libsmb/async_smb.c index 7e8adda5d4..ed68a5d927 100644 --- a/source3/libsmb/async_smb.c +++ b/source3/libsmb/async_smb.c @@ -19,391 +19,38 @@ #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 "smb_crypt.h" -#include "libsmb/nmblib.h" +#include "../libcli/smb/smbXcli_base.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) -{ - uint32_t flags2 = SVAL(buf, smb_flg2); - - if (flags2 & FLAGS2_32_BIT_ERROR_CODES) { - return NT_STATUS(IVAL(buf, smb_rcls)); - } - - return dos_to_ntstatus(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; -} - -/** - * 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; + uint8_t smb_command; + struct tevent_req *req; + struct cli_smb_req_state **ptr; }; -static uint16_t cli_alloc_mid(struct cli_state *cli) +static int cli_smb_req_state_destructor(struct cli_smb_req_state *state) { - int num_pending = talloc_array_length(cli->pending); - uint16_t result; - - while (true) { - int i; - - result = cli->mid++; - if ((result == 0) || (result == 0xffff)) { - continue; - } - - for (i=0; i<num_pending; i++) { - if (result == cli_smb_req_mid(cli->pending[i])) { - break; - } - } - - if (i == num_pending) { - return result; - } - } -} - -void cli_smb_req_unset_pending(struct tevent_req *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 (state->mid != 0) { - /* - * This is a [nt]trans[2] request which waits - * for more than one reply. - */ - return; - } - - 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; - } - - 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_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 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; -} - -/* - * 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); -} - -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) -{ - 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) +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); - state->seqnum = seqnum; -} + struct cli_smb_req_state *state = *ptr; + void *parent = talloc_parent(state); -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; -} + talloc_set_destructor(state, NULL); -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 event_context *ev, + struct tevent_context *ev, struct cli_state *cli, uint8_t smb_command, uint8_t additional_flags, @@ -411,161 +58,57 @@ struct tevent_req *cli_smb_req_create(TALLOC_CTX *mem_ctx, 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 additional_flags2 = 0; + uint16_t clear_flags2 = 0; - if (iov_count > MAX_SMB_IOV) { - /* - * Should not happen :-) - */ - return NULL; - } - - result = tevent_req_create(mem_ctx, &state, struct cli_smb_state); - if (result == NULL) { + state = talloc_zero(mem_ctx, struct cli_smb_req_state); + if (state == 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); - - 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(cli->timeout / 1000, - (cli->timeout % 1000) * 1000); - if (!tevent_req_set_endtime(result, ev, endtime)) { - tevent_req_nomem(NULL, result); - } - } - 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 (state->cli->fd == -1) { - return NT_STATUS_CONNECTION_INVALID; - } - - if (iov[0].iov_len < smb_wct) { - return NT_STATUS_INVALID_PARAMETER; + state->smb_command = smb_command; + state->ptr = talloc(state, struct cli_smb_req_state *); + if (state->ptr == NULL) { + talloc_free(state); + return NULL; } + *state->ptr = state; - if (state->mid != 0) { - SSVAL(iov[0].iov_base, smb_mid, state->mid); + if (cli->case_sensitive) { + clear_flags |= FLAG_CASELESS_PATHNAMES; } else { - uint16_t mid = cli_alloc_mid(state->cli); - SSVAL(iov[0].iov_base, smb_mid, mid); + /* Default setting, case insensitive. */ + additional_flags |= FLAG_CASELESS_PATHNAMES; } - smb_setlen((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 ((smb1cli_conn_capabilities(cli->conn) & CAP_DFS) && cli->dfsroot) { + additional_flags2 |= FLAGS2_DFS_PATHNAMES; } - 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; - } - 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; + 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); + 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 event_context *ev, + struct tevent_context *ev, struct cli_state *cli, uint8_t smb_command, uint8_t additional_flags, @@ -573,225 +116,53 @@ struct tevent_req *cli_smb_send(TALLOC_CTX *mem_ctx, 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; + struct cli_smb_req_state *state; + uint8_t clear_flags = 0; + uint16_t additional_flags2 = 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; } - - 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; - } - } - - 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); - 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; + 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; } + *state->ptr = state; - if (cli_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))); - goto fail; - } - - 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; - } - - 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))); - goto fail; - } + if (cli->case_sensitive) { + clear_flags |= FLAG_CASELESS_PATHNAMES; + } else { + /* Default setting, case insensitive. */ + additional_flags |= FLAG_CASELESS_PATHNAMES; } - mid = SVAL(inbuf, smb_mid); - num_pending = talloc_array_length(cli->pending); - - for (i=0; i<num_pending; i++) { - if (mid == cli_smb_req_mid(cli->pending[i])) { - break; - } - } - if (i == num_pending) { - /* Dump unexpected reply */ - TALLOC_FREE(inbuf); - goto done; + if ((smb1cli_conn_capabilities(cli->conn) & CAP_DFS) && cli->dfsroot) { + additional_flags2 |= FLAGS2_DFS_PATHNAMES; } - 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 */ - TALLOC_FREE(inbuf); - goto done; - } - } - - req = cli->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")); - TALLOC_FREE(inbuf); - status = NT_STATUS_ACCESS_DENIED; - close(cli->fd); - cli->fd = -1; - goto fail; + 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; } - if (state->chained_requests == NULL) { - state->inbuf = talloc_move(state, &inbuf); - talloc_set_destructor(req, NULL); - cli_smb_req_unset_pending(req); - state->chain_num = 0; - state->chain_length = 1; - tevent_req_done(req); - } else { - struct tevent_req **chain = talloc_move( - talloc_tos(), &state->chained_requests); - int num_chained = talloc_array_length(chain); + 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); - for (i=0; i<num_chained; i++) { - state = tevent_req_data(chain[i], struct - cli_smb_state); - state->inbuf = inbuf; - state->chain_num = i; - state->chain_length = num_chained; - 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_unset_pending(req); - tevent_req_nterror(req, status); - } + return state->req; } NTSTATUS cli_smb_recv(struct tevent_req *req, @@ -799,120 +170,88 @@ 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)) { - /* - * This request was not completed because a previous - * request in the chain had received an error. - */ - return NT_STATUS_REQUEST_ABORTED; - } - - 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; - } - - cmd = CVAL(state->inbuf, wct_ofs + 1); + if (pvwv != NULL) { + *pvwv = NULL; } - - status = cli_pull_error((char *)state->inbuf); - - cli_set_error(state->cli, status); - - if (!have_andx_command((char *)state->inbuf, wct_ofs)) { - - if ((cmd == SMBsesssetupX) - && NT_STATUS_EQUAL( - status, NT_STATUS_MORE_PROCESSING_REQUIRED)) { + 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)) { /* * NT_STATUS_MORE_PROCESSING_REQUIRED is a * valid return code for session setup */ - goto no_err; + is_expected = true; } - 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; - } + map_dos_errors = state->cli->map_dos_errors; + state->cli->raw_status = status; + talloc_free(state->ptr); + state = NULL; } -no_err: + 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 old cli_pull_error() also does it, so I do not change + * the behavior yet. + */ + status = dos_to_ntstatus(eclass, ecode); + } - wct = CVAL(state->inbuf, wct_ofs); - bytes_offset = wct_ofs + 1 + wct * sizeof(uint16_t); - num_bytes = SVAL(state->inbuf, bytes_offset); + if (!NT_STATUS_IS_ERR(status)) { + is_expected = true; + } - 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; } @@ -920,360 +259,28 @@ no_err: *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; - } - 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; - } + *pbytes = bytes; } - 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; - - 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; - } - - return NT_STATUS_OK; -} - -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; -} - -bool cli_has_async_calls(struct cli_state *cli) -{ - return ((tevent_queue_length(cli->outgoing) != 0) - || (talloc_array_length(cli->pending) != 0)); -} - -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) -{ - 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; + return status; } |