diff options
Diffstat (limited to 'source3/libsmb')
| -rw-r--r-- | source3/libsmb/async_smb.c | 483 |
1 files changed, 0 insertions, 483 deletions
diff --git a/source3/libsmb/async_smb.c b/source3/libsmb/async_smb.c deleted file mode 100644 index 21bcd5b9b1..0000000000 --- a/source3/libsmb/async_smb.c +++ /dev/null @@ -1,483 +0,0 @@ -/* - Unix SMB/CIFS implementation. - Infrastructure for async SMB client requests - Copyright (C) Volker Lendecke 2008 - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. -*/ - -#include "includes.h" - -/* - * Fetch an error out of a NBT packet - */ - -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 NT_STATUS_DOS(CVAL(buf, smb_rcls), SVAL(buf,smb_err)); -} - -/* - * Compatibility helper for the sync APIs: Fake NTSTATUS in cli->inbuf - */ - -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; -} - -/* - * Allocate a new mid - */ - -static uint16_t cli_new_mid(struct cli_state *cli) -{ - uint16_t result; - struct cli_request *req; - - while (true) { - result = cli->mid++; - if (result == 0) { - continue; - } - - for (req = cli->outstanding_requests; req; req = req->next) { - if (result == req->mid) { - break; - } - } - - if (req == NULL) { - return result; - } - } -} - -static char *cli_request_print(TALLOC_CTX *mem_ctx, struct async_req *req) -{ - char *result = async_req_print(mem_ctx, req); - struct cli_request *cli_req = cli_request_get(req); - - if (result == NULL) { - return NULL; - } - - return talloc_asprintf_append_buffer( - result, "mid=%d\n", cli_req->mid); -} - -static int cli_request_destructor(struct cli_request *req) -{ - if (req->enc_state != NULL) { - common_free_enc_buffer(req->enc_state, req->outbuf); - } - DLIST_REMOVE(req->cli->outstanding_requests, req); - return 0; -} - -/* - * Create a fresh async smb request - */ - -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) -{ - struct async_req *result; - struct cli_request *cli_req; - size_t bufsize = smb_size + num_words * 2 + num_bytes; - - result = async_req_new(mem_ctx, ev); - if (result == NULL) { - return NULL; - } - - cli_req = (struct cli_request *)talloc_size( - result, sizeof(*cli_req) + bufsize); - if (cli_req == NULL) { - TALLOC_FREE(result); - 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; - - SCVAL(cli_req->outbuf, smb_wct, num_words); - SSVAL(cli_req->outbuf, smb_vwv + num_words * 2, num_bytes); - - DLIST_ADD_END(cli->outstanding_requests, cli_req, - struct cli_request *); - talloc_set_destructor(cli_req, cli_request_destructor); - - DEBUG(10, ("cli_request_new: mid=%d\n", cli_req->mid)); - - *preq = cli_req; - return result; -} - -/* - * Convenience function to get the SMB part out of an async_req - */ - -struct cli_request *cli_request_get(struct async_req *req) -{ - if (req == NULL) { - return NULL; - } - return talloc_get_type_abort(req->private_data, struct cli_request); -} - -/* - * A PDU has arrived on cli->evt_inbuf - */ - -static void handle_incoming_pdu(struct cli_state *cli) -{ - struct cli_request *req; - uint16_t mid; - size_t raw_pdu_len, buf_len, pdu_len; - size_t rest_len; - NTSTATUS status; - - /* - * The encrypted PDU len might differ from the unencrypted one - */ - raw_pdu_len = smb_len(cli->evt_inbuf) + 4; - - /* - * TODO: Handle oplock break requests - */ - - if (cli_encryption_on(cli) && CVAL(cli->evt_inbuf, 0) == 0) { - uint16_t enc_ctx_num; - - status = get_enc_ctx_num((uint8_t *)cli->evt_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; - } - - 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 invalidate_requests; - } - - status = common_decrypt_buffer(cli->trans_enc_state, - cli->evt_inbuf); - if (!NT_STATUS_IS_OK(status)) { - DEBUG(10, ("common_decrypt_buffer returned %s\n", - nt_errstr(status))); - goto invalidate_requests; - } - } - - if (!cli_check_sign_mac(cli, cli->evt_inbuf)) { - DEBUG(10, ("cli_check_sign_mac failed\n")); - status = NT_STATUS_ACCESS_DENIED; - goto invalidate_requests; - } - - mid = SVAL(cli->evt_inbuf, smb_mid); - - DEBUG(10, ("handle_incoming_pdu: got mid %d\n", mid)); - - for (req = cli->outstanding_requests; req; req = req->next) { - if (req->mid == mid) { - break; - } - } - - buf_len = talloc_get_size(cli->evt_inbuf); - pdu_len = smb_len(cli->evt_inbuf) + 4; - rest_len = buf_len - raw_pdu_len; - - if (req == NULL) { - DEBUG(3, ("Request for mid %d not found, dumping PDU\n", mid)); - - memmove(cli->evt_inbuf, cli->evt_inbuf + raw_pdu_len, - buf_len - raw_pdu_len); - - cli->evt_inbuf = TALLOC_REALLOC_ARRAY(NULL, cli->evt_inbuf, - char, rest_len); - return; - } - - if (buf_len == pdu_len) { - /* - * Optimal case: Exactly one PDU was in the socket buffer - */ - req->inbuf = talloc_move(req, &cli->evt_inbuf); - goto done; - } - - DEBUG(11, ("buf_len = %d, pdu_len = %d, splitting buffer\n", - (int)buf_len, (int)pdu_len)); - - if (pdu_len < rest_len) { - /* - * The PDU is shorter, talloc_memdup that one. - */ - req->inbuf = (char *)talloc_memdup( - req, cli->evt_inbuf, pdu_len); - - memmove(cli->evt_inbuf, - cli->evt_inbuf + raw_pdu_len, - buf_len - raw_pdu_len); - - cli->evt_inbuf = TALLOC_REALLOC_ARRAY( - NULL, cli->evt_inbuf, char, rest_len); - } - else { - /* - * The PDU is larger than the rest, - * talloc_memdup the rest - */ - req->inbuf = talloc_move(req, &cli->evt_inbuf); - - cli->evt_inbuf = (char *)talloc_memdup( - cli, req->inbuf + raw_pdu_len, - rest_len); - } - - if ((req->inbuf == NULL) || (cli->evt_inbuf == NULL)) { - status = NT_STATUS_NO_MEMORY; - goto invalidate_requests; - } - - done: - async_req_done(req->async); - return; - - invalidate_requests: - - DEBUG(10, ("handle_incoming_pdu: Aborting with %s\n", - nt_errstr(status))); - - for (req = cli->outstanding_requests; req; req = req->next) { - async_req_error(req->async, status); - } - return; -} - -/* - * 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) -{ - struct cli_state *cli = (struct cli_state *)p; - struct cli_request *req; - - DEBUG(11, ("cli_state_handler called with flags %d\n", flags)); - - if (flags & EVENT_FD_READ) { - int res, available; - size_t old_size, new_size; - char *tmp; - - res = ioctl(cli->fd, FIONREAD, &available); - if (res == -1) { - DEBUG(10, ("ioctl(FIONREAD) failed: %s\n", - strerror(errno))); - goto sock_error; - } - - if (available == 0) { - /* EOF */ - goto sock_error; - } - - old_size = talloc_get_size(cli->evt_inbuf); - new_size = old_size + available; - - if (new_size < old_size) { - /* wrap */ - goto sock_error; - } - - tmp = TALLOC_REALLOC_ARRAY(cli, cli->evt_inbuf, char, - new_size); - if (tmp == NULL) { - /* nomem */ - goto sock_error; - } - 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; - } - - DEBUG(11, ("cli_state_handler: received %d bytes, " - "smb_len(evt_inbuf) = %d\n", (int)res, - smb_len(cli->evt_inbuf))); - - /* recv *might* have returned less than announced */ - new_size = old_size + res; - - /* shrink, so I don't expect errors here */ - cli->evt_inbuf = TALLOC_REALLOC_ARRAY(cli, cli->evt_inbuf, - char, new_size); - - while ((cli->evt_inbuf != NULL) - && ((smb_len(cli->evt_inbuf) + 4) <= new_size)) { - /* - * we've got a complete NBT level PDU in evt_inbuf - */ - handle_incoming_pdu(cli); - new_size = talloc_get_size(cli->evt_inbuf); - } - } - - if (flags & EVENT_FD_WRITE) { - size_t to_send; - ssize_t sent; - - for (req = cli->outstanding_requests; req; req = req->next) { - to_send = smb_len(req->outbuf)+4; - if (to_send > req->sent) { - break; - } - } - - if (req == NULL) { - event_fd_set_not_writeable(event); - return; - } - - sent = send(cli->fd, req->outbuf + req->sent, - to_send - req->sent, 0); - - if (sent < 0) { - goto sock_error; - } - - req->sent += sent; - - if (req->sent == to_send) { - return; - } - } - 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); - } - TALLOC_FREE(cli->fd_event); - close(cli->fd); - cli->fd = -1; -} - -/* - * Holder for a talloc_destructor, we need to zero out the pointers in cli - * when deleting - */ -struct cli_tmp_event { - struct cli_state *cli; -}; - -static int cli_tmp_event_destructor(struct cli_tmp_event *e) -{ - TALLOC_FREE(e->cli->fd_event); - TALLOC_FREE(e->cli->event_ctx); - return 0; -} - -/* - * Create a temporary event context for use in the sync helper functions - */ - -struct cli_tmp_event *cli_tmp_event_ctx(TALLOC_CTX *mem_ctx, - struct cli_state *cli) -{ - struct cli_tmp_event *state; - - if (cli->event_ctx != NULL) { - return NULL; - } - - state = talloc(mem_ctx, struct cli_tmp_event); - if (state == NULL) { - return NULL; - } - state->cli = cli; - talloc_set_destructor(state, cli_tmp_event_destructor); - - cli->event_ctx = event_context_init(state); - if (cli->event_ctx == NULL) { - TALLOC_FREE(state); - return NULL; - } - - 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; - } - return state; -} - -/* - * Attach an event context permanently to a cli_struct - */ - -NTSTATUS cli_add_event_ctx(struct cli_state *cli, - struct event_context *event_ctx) -{ - 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; - } - return NT_STATUS_OK; -} |