/* Unix SMB/CIFS implementation. client file read/write routines Copyright (C) Andrew Tridgell 1994-1998 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" /**************************************************************************** Calculate the recommended read buffer size ****************************************************************************/ static size_t cli_read_max_bufsize(struct cli_state *cli) { if (!client_is_signing_on(cli) && !cli_encryption_on(cli) && (cli->posix_capabilities & CIFS_UNIX_LARGE_READ_CAP)) { return CLI_SAMBA_MAX_POSIX_LARGE_READX_SIZE; } if (cli->capabilities & CAP_LARGE_READX) { return cli->is_samba ? CLI_SAMBA_MAX_LARGE_READX_SIZE : CLI_WINDOWS_MAX_LARGE_READX_SIZE; } return (cli->max_xmit - (smb_size+32)) & ~1023; } /**************************************************************************** Calculate the recommended write buffer size ****************************************************************************/ static size_t cli_write_max_bufsize(struct cli_state *cli, uint16_t write_mode) { if (write_mode == 0 && !client_is_signing_on(cli) && !cli_encryption_on(cli) && (cli->posix_capabilities & CIFS_UNIX_LARGE_WRITE_CAP) && (cli->capabilities & CAP_LARGE_FILES)) { /* Only do massive writes if we can do them direct * with no signing or encrypting - not on a pipe. */ return CLI_SAMBA_MAX_POSIX_LARGE_WRITEX_SIZE; } if (cli->is_samba) { return CLI_SAMBA_MAX_LARGE_WRITEX_SIZE; } if (((cli->capabilities & CAP_LARGE_WRITEX) == 0) || client_is_signing_on(cli) || strequal(cli->dev, "LPT1:")) { /* * Printer devices are restricted to max_xmit writesize in * Vista and XPSP3 as are signing connections. */ return (cli->max_xmit - (smb_size+32)) & ~1023; } return CLI_WINDOWS_MAX_LARGE_WRITEX_SIZE; } struct cli_read_andx_state { size_t size; uint16_t vwv[12]; NTSTATUS status; size_t received; uint8_t *buf; }; static void cli_read_andx_done(struct tevent_req *subreq); struct tevent_req *cli_read_andx_create(TALLOC_CTX *mem_ctx, struct event_context *ev, struct cli_state *cli, uint16_t fnum, off_t offset, size_t size, struct tevent_req **psmbreq) { struct tevent_req *req, *subreq; struct cli_read_andx_state *state; uint8_t wct = 10; if (size > cli_read_max_bufsize(cli)) { DEBUG(0, ("cli_read_andx_send got size=%d, can only handle " "size=%d\n", (int)size, (int)cli_read_max_bufsize(cli))); return NULL; } req = tevent_req_create(mem_ctx, &state, struct cli_read_andx_state); if (req == NULL) { return NULL; } state->size = size; SCVAL(state->vwv + 0, 0, 0xFF); SCVAL(state->vwv + 0, 1, 0); SSVAL(state->vwv + 1, 0, 0); SSVAL(state->vwv + 2, 0, fnum); SIVAL(state->vwv + 3, 0, offset); SSVAL(state->vwv + 5, 0, size); SSVAL(state->vwv + 6, 0, size); SSVAL(state->vwv + 7, 0, (size >> 16)); SSVAL(state->vwv + 8, 0, 0); SSVAL(state->vwv + 9, 0, 0); if ((uint64_t)offset >> 32) { SIVAL(state->vwv + 10, 0, (((uint64_t)offset)>>32) & 0xffffffff); wct += 2; } subreq = cli_smb_req_create(state, ev, cli, SMBreadX, 0, wct, state->vwv, 0, NULL); if (subreq == NULL) { TALLOC_FREE(req); return NULL; } tevent_req_set_callback(subreq, cli_read_andx_done, req); *psmbreq = subreq; return req; } struct tevent_req *cli_read_andx_send(TALLOC_CTX *mem_ctx, struct event_context *ev, struct cli_state *cli, uint16_t fnum, off_t offset, size_t size) { struct tevent_req *req, *subreq; NTSTATUS status; req = cli_read_andx_create(mem_ctx, ev, cli, fnum, offset, size, &subreq); if (req == NULL) { return NULL; } status = cli_smb_req_send(subreq); if (!NT_STATUS_IS_OK(status)) { tevent_req_nterror(req, status); return tevent_req_post(req, ev); } return req; } static void cli_read_andx_done(struct tevent_req *subreq) { struct tevent_req *req = tevent_req_callback_data( subreq, struct tevent_req); struct cli_read_andx_state *state = tevent_req_data( req, struct cli_read_andx_state); uint8_t *inbuf; uint8_t wct; uint16_t *vwv; uint32_t num_bytes; uint8_t *bytes; state->status = cli_smb_recv(subreq, state, &inbuf, 12, &wct, &vwv, &num_bytes, &bytes); TALLOC_FREE(subreq); if (NT_STATUS_IS_ERR(state->status)) { tevent_req_nterror(req, state->status); return; } /* size is the number of bytes the server returned. * Might be zero. */ state->received = SVAL(vwv + 5, 0); state->received |= (((unsigned int)SVAL(vwv + 7, 0)) << 16); if (state->received > state->size) { DEBUG(5,("server returned more than we wanted!\n")); tevent_req_nterror(req, NT_STATUS_UNEXPECTED_IO_ERROR); return; } /* * bcc field must be valid for small reads, for large reads the 16-bit * bcc field can't be correct. */ if ((state->received < 0xffff) && (state->received > num_bytes)) { DEBUG(5, ("server announced more bytes than sent\n")); tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE); return; } state->buf = (uint8_t *)smb_base(inbuf) + SVAL(vwv+6, 0); if (trans_oob(smb_len(inbuf), SVAL(vwv+6, 0), state->received) || ((state->received != 0) && (state->buf < bytes))) { DEBUG(5, ("server returned invalid read&x data offset\n")); tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE); return; } tevent_req_done(req); } /* * Pull the data out of a finished async read_and_x request. rcvbuf is * talloced from the request, so better make sure that you copy it away before * you talloc_free(req). "rcvbuf" is NOT a talloc_ctx of its own, so do not * talloc_move it! */ NTSTATUS cli_read_andx_recv(struct tevent_req *req, ssize_t *received, uint8_t **rcvbuf) { struct cli_read_andx_state *state = tevent_req_data( req, struct cli_read_andx_state); NTSTATUS status; if (tevent_req_is_nterror(req, &status)) { return status; } *received = state->received; *rcvbuf = state->buf; return NT_STATUS_OK; } struct cli_readall_state { struct tevent_context *ev; struct cli_state *cli; uint16_t fnum; off_t start_offset; size_t size; size_t received; uint8_t *buf; }; static void cli_readall_done(struct tevent_req *subreq); static struct tevent_req *cli_readall_send(TALLOC_CTX *mem_ctx, struct event_context *ev, struct cli_state *cli, uint16_t fnum, off_t offset, size_t size) { struct tevent_req *req, *subreq; struct cli_readall_state *state; req = tevent_req_create(mem_ctx, &state, struct cli_readall_state); if (req == NULL) { return NULL; } state->ev = ev; state->cli = cli; state->fnum = fnum; state->start_offset = offset; state->size = size; state->received = 0; state->buf = NULL; subreq = cli_read_andx_send(state, ev, cli, fnum, offset, size); if (tevent_req_nomem(subreq, req)) { return tevent_req_post(req, ev); } tevent_req_set_callback(subreq, cli_readall_done, req); return req; } static void cli_readall_done(struct tevent_req *subreq) { struct tevent_req *req = tevent_req_callback_data( subreq, struct tevent_req); struct cli_readall_state *state = tevent_req_data( req, struct cli_readall_state); ssize_t received; uint8_t *buf; NTSTATUS status; status = cli_read_andx_recv(subreq, &received, &buf); if (!NT_STATUS_IS_OK(status)) { tevent_req_nterror(req, status); return; } if (received == 0) { /* EOF */ tevent_req_done(req); return; } if ((state->received == 0) && (received == state->size)) { /* Ideal case: Got it all in one run */ state->buf = buf; state->received += received; tevent_req_done(req); return; } /* * We got a short read, issue a read for the * rest. Unfortunately we have to allocate the buffer * ourselves now, as our caller expects to receive a single * buffer. cli_read_andx does it from the buffer received from * the net, but with a short read we have to put it together * from several reads. */ if (state->buf == NULL) { state->buf = talloc_array(state, uint8_t, state->size); if (tevent_req_nomem(state->buf, req)) { return; } } memcpy(state->buf + state->received, buf, received); state->received += received; TALLOC_FREE(subreq); if (state->received >= state->size) { tevent_req_done(req); return; } subreq = cli_read_andx_send(state, state->ev, state->cli, state->fnum, state->start_offset + state->received, state->size - state->received); if (tevent_req_nomem(subreq, req)) { return; } tevent_req_set_callback(subreq, cli_readall_done, req); } static NTSTATUS cli_readall_recv(struct tevent_req *req, ssize_t *received, uint8_t **rcvbuf) { struct cli_readall_state *state = tevent_req_data( req, struct cli_readall_state); NTSTATUS status; if (tevent_req_is_nterror(req, &status)) { return status; } *received = state->received; *rcvbuf = state->buf; return NT_STATUS_OK; } struct cli_pull_subreq { struct tevent_req *req; ssize_t received; uint8_t *buf; }; /* * Parallel read support. * * cli_pull sends as many read&x requests as the server would allow via * max_mux at a time. When replies flow back in, the data is written into * the callback function "sink" in the right order. */ struct cli_pull_state { struct tevent_req *req; struct event_context *ev; struct cli_state *cli; uint16_t fnum; off_t start_offset; SMB_OFF_T size; NTSTATUS (*sink)(char *buf, size_t n, void *priv); void *priv; size_t chunk_size; /* * Outstanding requests */ int num_reqs; struct cli_pull_subreq *reqs; /* * For how many bytes did we send requests already? */ SMB_OFF_T requested; /* * Next request index to push into "sink". This walks around the "req" * array, taking care that the requests are pushed to "sink" in the * right order. If necessary (i.e. replies don't come in in the right * order), replies are held back in "reqs". */ int top_req; /* * How many bytes did we push into "sink"? */ SMB_OFF_T pushed; }; static char *cli_pull_print(struct tevent_req *req, TALLOC_CTX *mem_ctx) { struct cli_pull_state *state = tevent_req_data( req, struct cli_pull_state); char *result; result = tevent_req_print(mem_ctx, req); if (result == NULL) { return NULL; } return talloc_asprintf_append_buffer( result, "num_reqs=%d, top_req=%d", state->num_reqs, state->top_req); } static void cli_pull_read_done(struct tevent_req *read_req); /* * Prepare an async pull request */ struct tevent_req *cli_pull_send(TALLOC_CTX *mem_ctx, struct event_context *ev, struct cli_state *cli, uint16_t fnum, off_t start_offset, SMB_OFF_T size, size_t window_size, NTSTATUS (*sink)(char *buf, size_t n, void *priv), void *priv) { struct tevent_req *req; struct cli_pull_state *state; int i; req = tevent_req_create(mem_ctx, &state, struct cli_pull_state); if (req == NULL) { return NULL; } tevent_req_set_print_fn(req, cli_pull_print); state->req = req; state->cli = cli; state->ev = ev; state->fnum = fnum; state->start_offset = start_offset; state->size = size; state->sink = sink; state->priv = priv; state->pushed = 0; state->top_req = 0; if (size == 0) { tevent_req_done(req); return tevent_req_post(req, ev); } state->chunk_size = cli_read_max_bufsize(cli); state->num_reqs = MAX(window_size/state->chunk_size, 1); state->num_reqs = MIN(state->num_reqs, cli->max_mux); state->reqs = TALLOC_ZERO_ARRAY(state, struct cli_pull_subreq, state->num_reqs); if (state->reqs == NULL) { goto failed; } state->requested = 0; for (i=0; i<state->num_reqs; i++) { struct cli_pull_subreq *subreq = &state->reqs[i]; SMB_OFF_T size_left; size_t request_thistime; if (state->requested >= size) { state->num_reqs = i; break; } size_left = size - state->requested; request_thistime = MIN(size_left, state->chunk_size); subreq->req = cli_readall_send( state->reqs, ev, cli, fnum, state->start_offset + state->requested, request_thistime); if (subreq->req == NULL) { goto failed; } tevent_req_set_callback(subreq->req, cli_pull_read_done, req); state->requested += request_thistime; } return req; failed: TALLOC_FREE(req); return NULL; } /* * Handle incoming read replies, push the data into sink and send out new * requests if necessary. */ static void cli_pull_read_done(struct tevent_req *subreq) { struct tevent_req *req = tevent_req_callback_data( subreq, struct tevent_req); struct cli_pull_state *state = tevent_req_data( req, struct cli_pull_state); struct cli_pull_subreq *pull_subreq = NULL; NTSTATUS status; int i; for (i = 0; i < state->num_reqs; i++) { pull_subreq = &state->reqs[i]; if (subreq == pull_subreq->req) { break; } } if (i == state->num_reqs) { /* Huh -- received something we did not send?? */ tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR); return; } status = cli_readall_recv(subreq, &pull_subreq->received, &pull_subreq->buf); if (!NT_STATUS_IS_OK(status)) { tevent_req_nterror(state->req, status); return; } /* * This loop is the one to take care of out-of-order replies. All * pending requests are in state->reqs, state->reqs[top_req] is the * one that is to be pushed next. If however a request later than * top_req is replied to, then we can't push yet. If top_req is * replied to at a later point then, we need to push all the finished * requests. */ while (state->reqs[state->top_req].req != NULL) { struct cli_pull_subreq *top_subreq; DEBUG(11, ("cli_pull_read_done: top_req = %d\n", state->top_req)); top_subreq = &state->reqs[state->top_req]; if (tevent_req_is_in_progress(top_subreq->req)) { DEBUG(11, ("cli_pull_read_done: top request not yet " "done\n")); return; } DEBUG(10, ("cli_pull_read_done: Pushing %d bytes, %d already " "pushed\n", (int)top_subreq->received, (int)state->pushed)); status = state->sink((char *)top_subreq->buf, top_subreq->received, state->priv); if (!NT_STATUS_IS_OK(status)) { tevent_req_nterror(state->req, status); return; } state->pushed += top_subreq->received; TALLOC_FREE(state->reqs[state->top_req].req); if (state->requested < state->size) { struct tevent_req *new_req; SMB_OFF_T size_left; size_t request_thistime; size_left = state->size - state->requested; request_thistime = MIN(size_left, state->chunk_size); DEBUG(10, ("cli_pull_read_done: Requesting %d bytes " "at %d, position %d\n", (int)request_thistime, (int)(state->start_offset + state->requested), state->top_req)); new_req = cli_readall_send( state->reqs, state->ev, state->cli, state->fnum, state->start_offset + state->requested, request_thistime); if (tevent_req_nomem(new_req, state->req)) { return; } tevent_req_set_callback(new_req, cli_pull_read_done, req); state->reqs[state->top_req].req = new_req; state->requested += request_thistime; } state->top_req = (state->top_req+1) % state->num_reqs; } tevent_req_done(req); } NTSTATUS cli_pull_recv(struct tevent_req *req, SMB_OFF_T *received) { struct cli_pull_state *state = tevent_req_data( req, struct cli_pull_state); NTSTATUS status; if (tevent_req_is_nterror(req, &status)) { return status; } *received = state->pushed; return NT_STATUS_OK; } NTSTATUS cli_pull(struct cli_state *cli, uint16_t fnum, off_t start_offset, SMB_OFF_T size, size_t window_size, NTSTATUS (*sink)(char *buf, size_t n, void *priv), void *priv, SMB_OFF_T *received) { TALLOC_CTX *frame = talloc_stackframe(); struct event_context *ev; struct tevent_req *req; NTSTATUS status = NT_STATUS_OK; if (cli_has_async_calls(cli)) { /* * Can't use sync call while an async call is in flight */ status = NT_STATUS_INVALID_PARAMETER; goto fail; } ev = event_context_init(frame); if (ev == NULL) { status = NT_STATUS_NO_MEMORY; goto fail; } req = cli_pull_send(frame, ev, cli, fnum, start_offset, size, window_size, sink, priv); if (req == NULL) { status = NT_STATUS_NO_MEMORY; goto fail; } if (!tevent_req_poll(req, ev)) { status = map_nt_error_from_unix(errno); goto fail; } status = cli_pull_recv(req, received); fail: TALLOC_FREE(frame); if (!NT_STATUS_IS_OK(status)) { cli_set_error(cli, status); } return status; } static NTSTATUS cli_read_sink(char *buf, size_t n, void *priv) { char **pbuf = (char **)priv; memcpy(*pbuf, buf, n); *pbuf += n; return NT_STATUS_OK; } ssize_t cli_read(struct cli_state *cli, uint16_t fnum, char *buf, off_t offset, size_t size) { NTSTATUS status; SMB_OFF_T ret; status = cli_pull(cli, fnum, offset, size, size, cli_read_sink, &buf, &ret); if (!NT_STATUS_IS_OK(status)) { cli_set_error(cli, status); return -1; } return ret; } /**************************************************************************** Issue a single SMBwrite and don't wait for a reply. ****************************************************************************/ static bool cli_issue_write(struct cli_state *cli, uint16_t fnum, off_t offset, uint16 mode, const char *buf, size_t size, int i) { char *p; bool large_writex = false; /* We can only do direct writes if not signing and not encrypting. */ bool direct_writes = !client_is_signing_on(cli) && !cli_encryption_on(cli); if (!direct_writes && size + 1 > cli->bufsize) { cli->outbuf = (char *)SMB_REALLOC(cli->outbuf, size + 1024); if (!cli->outbuf) { return False; } cli->inbuf = (char *)SMB_REALLOC(cli->inbuf, size + 1024); if (cli->inbuf == NULL) { SAFE_FREE(cli->outbuf); return False; } cli->bufsize = size + 1024; } memset(cli->outbuf,'\0',smb_size); memset(cli->inbuf,'\0',smb_size); if (cli->capabilities & CAP_LARGE_FILES) { large_writex = True; } if (large_writex) { cli_set_message(cli->outbuf,14,0,True); } else { cli_set_message(cli->outbuf,12,0,True); } SCVAL(cli->outbuf,smb_com,SMBwriteX); SSVAL(cli->outbuf,smb_tid,cli->cnum); cli_setup_packet(cli); SCVAL(cli->outbuf,smb_vwv0,0xFF); SSVAL(cli->outbuf,smb_vwv2,fnum); SIVAL(cli->outbuf,smb_vwv3,offset); SIVAL(cli->outbuf,smb_vwv5,0); SSVAL(cli->outbuf,smb_vwv7,mode); SSVAL(cli->outbuf,smb_vwv8,(mode & 0x0008) ? size : 0); /* * According to CIFS-TR-1p00, this following field should only * be set if CAP_LARGE_WRITEX is set. We should check this * locally. However, this check might already have been * done by our callers. */ SSVAL(cli->outbuf,smb_vwv9,(size>>16)); SSVAL(cli->outbuf,smb_vwv10,size); /* +1 is pad byte. */ SSVAL(cli->outbuf,smb_vwv11, smb_buf(cli->outbuf) - smb_base(cli->outbuf) + 1); if (large_writex) { SIVAL(cli->outbuf,smb_vwv12,(((uint64_t)offset)>>32) & 0xffffffff); } p = smb_base(cli->outbuf) + SVAL(cli->outbuf,smb_vwv11) -1; *p++ = '\0'; /* pad byte. */ if (!direct_writes) { memcpy(p, buf, size); } if (size > 0x1FFFF) { /* This is a POSIX 14 word large write. */ set_message_bcc(cli->outbuf, 0); /* Set bcc to zero. */ _smb_setlen_large(cli->outbuf,smb_size + 28 + 1 /* pad */ + size - 4); } else { cli_setup_bcc(cli, p+size); } SSVAL(cli->outbuf,smb_mid,cli->mid + i); show_msg(cli->outbuf); if (direct_writes) { /* For direct writes we now need to write the data * directly out of buf. */ return cli_send_smb_direct_writeX(cli, buf, size); } else { return cli_send_smb(cli); } } /**************************************************************************** write to a file write_mode: 0x0001 disallow write cacheing 0x0002 return bytes remaining 0x0004 use raw named pipe protocol 0x0008 start of message mode named pipe protocol ****************************************************************************/ ssize_t cli_write(struct cli_state *cli, uint16_t fnum, uint16 write_mode, const char *buf, off_t offset, size_t size) { ssize_t bwritten = 0; unsigned int issued = 0; unsigned int received = 0; int mpx = 1; size_t writesize; int blocks; if(cli->max_mux > 1) { mpx = cli->max_mux-1; } else { mpx = 1; } writesize = cli_write_max_bufsize(cli, write_mode); blocks = (size + (writesize-1)) / writesize; while (received < blocks) { while ((issued - received < mpx) && (issued < blocks)) { ssize_t bsent = issued * writesize; ssize_t size1 = MIN(writesize, size - bsent); if (!cli_issue_write(cli, fnum, offset + bsent, write_mode, buf + bsent, size1, issued)) return -1; issued++; } if (!cli_receive_smb(cli)) { return bwritten; } received++; if (cli_is_error(cli)) break; bwritten += SVAL(cli->inbuf, smb_vwv2); if (writesize > 0xFFFF) { bwritten += (((int)(SVAL(cli->inbuf, smb_vwv4)))<<16); } } while (received < issued && cli_receive_smb(cli)) { received++; } return bwritten; } /**************************************************************************** write to a file using a SMBwrite and not bypassing 0 byte writes ****************************************************************************/ ssize_t cli_smbwrite(struct cli_state *cli, uint16_t fnum, char *buf, off_t offset, size_t size1) { char *p; ssize_t total = 0; do { size_t size = MIN(size1, cli->max_xmit - 48); memset(cli->outbuf,'\0',smb_size); memset(cli->inbuf,'\0',smb_size); cli_set_message(cli->outbuf,5, 0,True); SCVAL(cli->outbuf,smb_com,SMBwrite); SSVAL(cli->outbuf,smb_tid,cli->cnum); cli_setup_packet(cli); SSVAL(cli->outbuf,smb_vwv0,fnum); SSVAL(cli->outbuf,smb_vwv1,size); SIVAL(cli->outbuf,smb_vwv2,offset); SSVAL(cli->outbuf,smb_vwv4,0); p = smb_buf(cli->outbuf); *p++ = 1; SSVAL(p, 0, size); p += 2; memcpy(p, buf + total, size); p += size; cli_setup_bcc(cli, p); if (!cli_send_smb(cli)) return -1; if (!cli_receive_smb(cli)) return -1; if (cli_is_error(cli)) return -1; size = SVAL(cli->inbuf,smb_vwv0); if (size == 0) break; size1 -= size; total += size; offset += size; } while (size1); return total; } /* * Send a write&x request */ struct cli_write_andx_state { size_t size; uint16_t vwv[14]; size_t written; uint8_t pad; struct iovec iov[2]; }; static void cli_write_andx_done(struct tevent_req *subreq); struct tevent_req *cli_write_andx_create(TALLOC_CTX *mem_ctx, struct event_context *ev, struct cli_state *cli, uint16_t fnum, uint16_t mode, const uint8_t *buf, off_t offset, size_t size, struct tevent_req **reqs_before, int num_reqs_before, struct tevent_req **psmbreq) { struct tevent_req *req, *subreq; struct cli_write_andx_state *state; bool bigoffset = ((cli->capabilities & CAP_LARGE_FILES) != 0); uint8_t wct = bigoffset ? 14 : 12; size_t max_write = cli_write_max_bufsize(cli, mode); uint16_t *vwv; req = tevent_req_create(mem_ctx, &state, struct cli_write_andx_state); if (req == NULL) { return NULL; } size = MIN(size, max_write); vwv = state->vwv; SCVAL(vwv+0, 0, 0xFF); SCVAL(vwv+0, 1, 0); SSVAL(vwv+1, 0, 0); SSVAL(vwv+2, 0, fnum); SIVAL(vwv+3, 0, offset); SIVAL(vwv+5, 0, 0); SSVAL(vwv+7, 0, mode); SSVAL(vwv+8, 0, 0); SSVAL(vwv+9, 0, (size>>16)); SSVAL(vwv+10, 0, size); SSVAL(vwv+11, 0, cli_smb_wct_ofs(reqs_before, num_reqs_before) + 1 /* the wct field */ + wct * 2 /* vwv */ + 2 /* num_bytes field */ + 1 /* pad */); if (bigoffset) { SIVAL(vwv+12, 0, (((uint64_t)offset)>>32) & 0xffffffff); } state->pad = 0; state->iov[0].iov_base = (void *)&state->pad; state->iov[0].iov_len = 1; state->iov[1].iov_base = CONST_DISCARD(void *, buf); state->iov[1].iov_len = size; subreq = cli_smb_req_create(state, ev, cli, SMBwriteX, 0, wct, vwv, 2, state->iov); if (tevent_req_nomem(subreq, req)) { return tevent_req_post(req, ev); } tevent_req_set_callback(subreq, cli_write_andx_done, req); *psmbreq = subreq; return req; } struct tevent_req *cli_write_andx_send(TALLOC_CTX *mem_ctx, struct event_context *ev, struct cli_state *cli, uint16_t fnum, uint16_t mode, const uint8_t *buf, off_t offset, size_t size) { struct tevent_req *req, *subreq; NTSTATUS status; req = cli_write_andx_create(mem_ctx, ev, cli, fnum, mode, buf, offset, size, NULL, 0, &subreq); if (req == NULL) { return NULL; } status = cli_smb_req_send(subreq); if (!NT_STATUS_IS_OK(status)) { tevent_req_nterror(req, status); return tevent_req_post(req, ev); } return req; } static void cli_write_andx_done(struct tevent_req *subreq) { struct tevent_req *req = tevent_req_callback_data( subreq, struct tevent_req); struct cli_write_andx_state *state = tevent_req_data( req, struct cli_write_andx_state); uint8_t wct; uint16_t *vwv; uint8_t *inbuf; NTSTATUS status; status = cli_smb_recv(subreq, state, &inbuf, 6, &wct, &vwv, NULL, NULL); TALLOC_FREE(subreq); if (NT_STATUS_IS_ERR(status)) { tevent_req_nterror(req, status); return; } state->written = SVAL(vwv+2, 0); state->written |= SVAL(vwv+4, 0)<<16; tevent_req_done(req); } NTSTATUS cli_write_andx_recv(struct tevent_req *req, size_t *pwritten) { struct cli_write_andx_state *state = tevent_req_data( req, struct cli_write_andx_state); NTSTATUS status; if (tevent_req_is_nterror(req, &status)) { return status; } *pwritten = state->written; return NT_STATUS_OK; } struct cli_writeall_state { struct event_context *ev; struct cli_state *cli; uint16_t fnum; uint16_t mode; const uint8_t *buf; off_t offset; size_t size; size_t written; }; static void cli_writeall_written(struct tevent_req *req); static struct tevent_req *cli_writeall_send(TALLOC_CTX *mem_ctx, struct event_context *ev, struct cli_state *cli, uint16_t fnum, uint16_t mode, const uint8_t *buf, off_t offset, size_t size) { struct tevent_req *req, *subreq; struct cli_writeall_state *state; req = tevent_req_create(mem_ctx, &state, struct cli_writeall_state); if (req == NULL) { return NULL; } state->ev = ev; state->cli = cli; state->fnum = fnum; state->mode = mode; state->buf = buf; state->offset = offset; state->size = size; state->written = 0; subreq = cli_write_andx_send(state, state->ev, state->cli, state->fnum, state->mode, state->buf, state->offset, state->size); if (tevent_req_nomem(subreq, req)) { return tevent_req_post(req, ev); } tevent_req_set_callback(subreq, cli_writeall_written, req); return req; } static void cli_writeall_written(struct tevent_req *subreq) { struct tevent_req *req = tevent_req_callback_data( subreq, struct tevent_req); struct cli_writeall_state *state = tevent_req_data( req, struct cli_writeall_state); NTSTATUS status; size_t written, to_write; status = cli_write_andx_recv(subreq, &written); TALLOC_FREE(subreq); if (!NT_STATUS_IS_OK(status)) { tevent_req_nterror(req, status); return; } state->written += written; if (state->written > state->size) { tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE); return; } to_write = state->size - state->written; if (to_write == 0) { tevent_req_done(req); return; } subreq = cli_write_andx_send(state, state->ev, state->cli, state->fnum, state->mode, state->buf + state->written, state->offset + state->written, to_write); if (tevent_req_nomem(subreq, req)) { return; } tevent_req_set_callback(subreq, cli_writeall_written, req); } static NTSTATUS cli_writeall_recv(struct tevent_req *req) { return tevent_req_simple_recv_ntstatus(req); } struct cli_push_write_state { struct tevent_req *req;/* This is the main request! Not the subreq */ uint32_t idx; off_t ofs; uint8_t *buf; size_t size; }; struct cli_push_state { struct event_context *ev; struct cli_state *cli; uint16_t fnum; uint16_t mode; off_t start_offset; size_t window_size; size_t (*source)(uint8_t *buf, size_t n, void *priv); void *priv; bool eof; size_t chunk_size; off_t next_offset; /* * Outstanding requests */ uint32_t pending; uint32_t num_reqs; struct cli_push_write_state **reqs; }; static void cli_push_written(struct tevent_req *req); static bool cli_push_write_setup(struct tevent_req *req, struct cli_push_state *state, uint32_t idx) { struct cli_push_write_state *substate; struct tevent_req *subreq; substate = talloc(state->reqs, struct cli_push_write_state); if (!substate) { return false; } substate->req = req; substate->idx = idx; substate->ofs = state->next_offset; substate->buf = talloc_array(substate, uint8_t, state->chunk_size); if (!substate->buf) { talloc_free(substate); return false; } substate->size = state->source(substate->buf, state->chunk_size, state->priv); if (substate->size == 0) { state->eof = true; /* nothing to send */ talloc_free(substate); return true; } subreq = cli_writeall_send(substate, state->ev, state->cli, state->fnum, state->mode, substate->buf, substate->ofs, substate->size); if (!subreq) { talloc_free(substate); return false; } tevent_req_set_callback(subreq, cli_push_written, substate); state->reqs[idx] = substate; state->pending += 1; state->next_offset += substate->size; return true; } struct tevent_req *cli_push_send(TALLOC_CTX *mem_ctx, struct event_context *ev, struct cli_state *cli, uint16_t fnum, uint16_t mode, off_t start_offset, size_t window_size, size_t (*source)(uint8_t *buf, size_t n, void *priv), void *priv) { struct tevent_req *req; struct cli_push_state *state; uint32_t i; req = tevent_req_create(mem_ctx, &state, struct cli_push_state); if (req == NULL) { return NULL; } state->cli = cli; state->ev = ev; state->fnum = fnum; state->start_offset = start_offset; state->mode = mode; state->source = source; state->priv = priv; state->eof = false; state->pending = 0; state->next_offset = start_offset; state->chunk_size = cli_write_max_bufsize(cli, mode); if (window_size == 0) { window_size = cli->max_mux * state->chunk_size; } state->num_reqs = window_size/state->chunk_size; if ((window_size % state->chunk_size) > 0) { state->num_reqs += 1; } state->num_reqs = MIN(state->num_reqs, cli->max_mux); state->num_reqs = MAX(state->num_reqs, 1); state->reqs = TALLOC_ZERO_ARRAY(state, struct cli_push_write_state *, state->num_reqs); if (state->reqs == NULL) { goto failed; } for (i=0; i<state->num_reqs; i++) { if (!cli_push_write_setup(req, state, i)) { goto failed; } if (state->eof) { break; } } if (state->pending == 0) { tevent_req_done(req); return tevent_req_post(req, ev); } return req; failed: tevent_req_nterror(req, NT_STATUS_NO_MEMORY); return tevent_req_post(req, ev); } static void cli_push_written(struct tevent_req *subreq) { struct cli_push_write_state *substate = tevent_req_callback_data( subreq, struct cli_push_write_state); struct tevent_req *req = substate->req; struct cli_push_state *state = tevent_req_data( req, struct cli_push_state); NTSTATUS status; uint32_t idx = substate->idx; state->reqs[idx] = NULL; state->pending -= 1; status = cli_writeall_recv(subreq); TALLOC_FREE(subreq); TALLOC_FREE(substate); if (!NT_STATUS_IS_OK(status)) { tevent_req_nterror(req, status); return; } if (!state->eof) { if (!cli_push_write_setup(req, state, idx)) { tevent_req_nterror(req, NT_STATUS_NO_MEMORY); return; } } if (state->pending == 0) { tevent_req_done(req); return; } } NTSTATUS cli_push_recv(struct tevent_req *req) { return tevent_req_simple_recv_ntstatus(req); } NTSTATUS cli_push(struct cli_state *cli, uint16_t fnum, uint16_t mode, off_t start_offset, size_t window_size, size_t (*source)(uint8_t *buf, size_t n, void *priv), void *priv) { TALLOC_CTX *frame = talloc_stackframe(); struct event_context *ev; struct tevent_req *req; NTSTATUS status = NT_STATUS_OK; if (cli_has_async_calls(cli)) { /* * Can't use sync call while an async call is in flight */ status = NT_STATUS_INVALID_PARAMETER; goto fail; } ev = event_context_init(frame); if (ev == NULL) { status = NT_STATUS_NO_MEMORY; goto fail; } req = cli_push_send(frame, ev, cli, fnum, mode, start_offset, window_size, source, priv); if (req == NULL) { status = NT_STATUS_NO_MEMORY; goto fail; } if (!tevent_req_poll(req, ev)) { status = map_nt_error_from_unix(errno); goto fail; } status = cli_push_recv(req); fail: TALLOC_FREE(frame); if (!NT_STATUS_IS_OK(status)) { cli_set_error(cli, status); } return status; }