diff options
Diffstat (limited to 'source3/libsmb/climessage.c')
| -rw-r--r-- | source3/libsmb/climessage.c | 411 |
1 files changed, 411 insertions, 0 deletions
diff --git a/source3/libsmb/climessage.c b/source3/libsmb/climessage.c new file mode 100644 index 0000000..8563615 --- /dev/null +++ b/source3/libsmb/climessage.c @@ -0,0 +1,411 @@ +/* + Unix SMB/CIFS implementation. + client message handling 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" +#include "../lib/util/tevent_ntstatus.h" +#include "async_smb.h" +#include "libsmb/libsmb.h" +#include "../libcli/smb/smbXcli_base.h" + +struct cli_message_start_state { + uint16_t grp; +}; + +static void cli_message_start_done(struct tevent_req *subreq); + +static struct tevent_req *cli_message_start_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct cli_state *cli, + const char *host, + const char *username) +{ + struct tevent_req *req, *subreq; + struct cli_message_start_state *state; + char *htmp = NULL; + char *utmp = NULL; + size_t hlen, ulen; + uint8_t *bytes, *p; + + req = tevent_req_create(mem_ctx, &state, + struct cli_message_start_state); + if (req == NULL) { + return NULL; + } + + if (!convert_string_talloc(talloc_tos(), CH_UNIX, CH_DOS, + username, strlen(username)+1, + &utmp, &ulen)) { + goto fail; + } + if (!convert_string_talloc(talloc_tos(), CH_UNIX, CH_DOS, + host, strlen(host)+1, + &htmp, &hlen)) { + goto fail; + } + + bytes = talloc_array(state, uint8_t, ulen+hlen+2); + if (bytes == NULL) { + goto fail; + } + p = bytes; + + *p++ = 4; + memcpy(p, utmp, ulen); + p += ulen; + *p++ = 4; + memcpy(p, htmp, hlen); + TALLOC_FREE(htmp); + TALLOC_FREE(utmp); + + subreq = cli_smb_send(state, ev, cli, SMBsendstrt, 0, 0, 0, NULL, + talloc_get_size(bytes), bytes); + if (tevent_req_nomem(subreq, req)) { + return tevent_req_post(req, ev); + } + tevent_req_set_callback(subreq, cli_message_start_done, req); + return req; +fail: + TALLOC_FREE(htmp); + TALLOC_FREE(utmp); + tevent_req_nterror(req, NT_STATUS_NO_MEMORY); + return tevent_req_post(req, ev); +} + +static void cli_message_start_done(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data( + subreq, struct tevent_req); + struct cli_message_start_state *state = tevent_req_data( + req, struct cli_message_start_state); + NTSTATUS status; + uint8_t wct; + uint16_t *vwv; + + status = cli_smb_recv(subreq, state, NULL, 0, &wct, &vwv, + NULL, NULL); + TALLOC_FREE(subreq); + if (tevent_req_nterror(req, status)) { + return; + } + if (wct >= 1) { + state->grp = SVAL(vwv+0, 0); + } else { + state->grp = 0; + } + tevent_req_done(req); +} + +static NTSTATUS cli_message_start_recv(struct tevent_req *req, + uint16_t *pgrp) +{ + struct cli_message_start_state *state = tevent_req_data( + req, struct cli_message_start_state); + NTSTATUS status; + + if (tevent_req_is_nterror(req, &status)) { + return status; + } + *pgrp = state->grp; + return NT_STATUS_OK; +} + +struct cli_message_text_state { + uint16_t vwv; +}; + +static void cli_message_text_done(struct tevent_req *subreq); + +static struct tevent_req *cli_message_text_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct cli_state *cli, + uint16_t grp, + const char *msg, + int msglen) +{ + struct tevent_req *req, *subreq; + struct cli_message_text_state *state; + char *tmp; + size_t tmplen; + uint8_t *bytes; + + req = tevent_req_create(mem_ctx, &state, + struct cli_message_text_state); + if (req == NULL) { + return NULL; + } + + SSVAL(&state->vwv, 0, grp); + + if (convert_string_talloc(talloc_tos(), CH_UNIX, CH_DOS, msg, msglen, + &tmp, &tmplen)) { + msg = tmp; + msglen = tmplen; + } else { + DEBUG(3, ("Conversion failed, sending message in UNIX " + "charset\n")); + tmp = NULL; + } + + bytes = talloc_array(state, uint8_t, msglen+3); + if (tevent_req_nomem(bytes, req)) { + TALLOC_FREE(tmp); + return tevent_req_post(req, ev); + } + SCVAL(bytes, 0, 1); /* pad */ + SSVAL(bytes+1, 0, msglen); + memcpy(bytes+3, msg, msglen); + TALLOC_FREE(tmp); + + subreq = cli_smb_send(state, ev, cli, SMBsendtxt, 0, 0, 1, &state->vwv, + talloc_get_size(bytes), bytes); + if (tevent_req_nomem(subreq, req)) { + return tevent_req_post(req, ev); + } + tevent_req_set_callback(subreq, cli_message_text_done, req); + return req; +} + +static void cli_message_text_done(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data( + subreq, struct tevent_req); + NTSTATUS status; + + status = cli_smb_recv(subreq, NULL, NULL, 0, NULL, NULL, NULL, NULL); + TALLOC_FREE(subreq); + if (tevent_req_nterror(req, status)) { + return; + } + tevent_req_done(req); +} + +static NTSTATUS cli_message_text_recv(struct tevent_req *req) +{ + return tevent_req_simple_recv_ntstatus(req); +} + +struct cli_message_end_state { + uint16_t vwv; +}; + +static void cli_message_end_done(struct tevent_req *subreq); + +static struct tevent_req *cli_message_end_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct cli_state *cli, + uint16_t grp) +{ + struct tevent_req *req, *subreq; + struct cli_message_end_state *state; + + req = tevent_req_create(mem_ctx, &state, + struct cli_message_end_state); + if (req == NULL) { + return NULL; + } + + SSVAL(&state->vwv, 0, grp); + + subreq = cli_smb_send(state, ev, cli, SMBsendend, 0, 0, 1, &state->vwv, + 0, NULL); + if (tevent_req_nomem(subreq, req)) { + return tevent_req_post(req, ev); + } + tevent_req_set_callback(subreq, cli_message_end_done, req); + return req; +} + +static void cli_message_end_done(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data( + subreq, struct tevent_req); + NTSTATUS status; + + status = cli_smb_recv(subreq, NULL, NULL, 0, NULL, NULL, NULL, NULL); + TALLOC_FREE(subreq); + if (tevent_req_nterror(req, status)) { + return; + } + tevent_req_done(req); +} + +static NTSTATUS cli_message_end_recv(struct tevent_req *req) +{ + return tevent_req_simple_recv_ntstatus(req); +} + +struct cli_message_state { + struct tevent_context *ev; + struct cli_state *cli; + size_t sent; + const char *message; + uint16_t grp; +}; + +static void cli_message_started(struct tevent_req *subreq); +static void cli_message_sent(struct tevent_req *subreq); +static void cli_message_done(struct tevent_req *subreq); + +struct tevent_req *cli_message_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct cli_state *cli, + const char *host, const char *username, + const char *message) +{ + struct tevent_req *req, *subreq; + struct cli_message_state *state; + + req = tevent_req_create(mem_ctx, &state, struct cli_message_state); + if (req == NULL) { + return NULL; + } + state->ev = ev; + state->cli = cli; + state->sent = 0; + state->message = message; + + subreq = cli_message_start_send(state, ev, cli, host, username); + if (tevent_req_nomem(subreq, req)) { + return tevent_req_post(req, ev); + } + tevent_req_set_callback(subreq, cli_message_started, req); + return req; +} + +static void cli_message_started(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data( + subreq, struct tevent_req); + struct cli_message_state *state = tevent_req_data( + req, struct cli_message_state); + NTSTATUS status; + size_t thistime; + + status = cli_message_start_recv(subreq, &state->grp); + TALLOC_FREE(subreq); + if (tevent_req_nterror(req, status)) { + return; + } + + thistime = MIN(127, strlen(state->message)); + + subreq = cli_message_text_send(state, state->ev, state->cli, + state->grp, state->message, thistime); + if (tevent_req_nomem(subreq, req)) { + return; + } + state->sent += thistime; + tevent_req_set_callback(subreq, cli_message_sent, req); +} + +static void cli_message_sent(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data( + subreq, struct tevent_req); + struct cli_message_state *state = tevent_req_data( + req, struct cli_message_state); + NTSTATUS status; + size_t left, thistime; + + status = cli_message_text_recv(subreq); + TALLOC_FREE(subreq); + if (tevent_req_nterror(req, status)) { + return; + } + + if (state->sent >= strlen(state->message)) { + subreq = cli_message_end_send(state, state->ev, state->cli, + state->grp); + if (tevent_req_nomem(subreq, req)) { + return; + } + tevent_req_set_callback(subreq, cli_message_done, req); + return; + } + + left = strlen(state->message) - state->sent; + thistime = MIN(127, left); + + subreq = cli_message_text_send(state, state->ev, state->cli, + state->grp, + state->message + state->sent, + thistime); + if (tevent_req_nomem(subreq, req)) { + return; + } + state->sent += thistime; + tevent_req_set_callback(subreq, cli_message_sent, req); +} + +static void cli_message_done(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data( + subreq, struct tevent_req); + NTSTATUS status; + + status = cli_message_end_recv(subreq); + TALLOC_FREE(subreq); + if (tevent_req_nterror(req, status)) { + return; + } + tevent_req_done(req); +} + +NTSTATUS cli_message_recv(struct tevent_req *req) +{ + return tevent_req_simple_recv_ntstatus(req); +} + +NTSTATUS cli_message(struct cli_state *cli, const char *host, + const char *username, const char *message) +{ + TALLOC_CTX *frame = talloc_stackframe(); + struct tevent_context *ev; + struct tevent_req *req; + NTSTATUS status = NT_STATUS_OK; + + if (smbXcli_conn_has_async_calls(cli->conn)) { + /* + * Can't use sync call while an async call is in flight + */ + status = NT_STATUS_INVALID_PARAMETER; + goto fail; + } + + ev = samba_tevent_context_init(frame); + if (ev == NULL) { + status = NT_STATUS_NO_MEMORY; + goto fail; + } + + req = cli_message_send(frame, ev, cli, host, username, message); + if (req == NULL) { + status = NT_STATUS_NO_MEMORY; + goto fail; + } + + if (!tevent_req_poll_ntstatus(req, ev, &status)) { + goto fail; + } + + status = cli_message_recv(req); + fail: + TALLOC_FREE(frame); + return status; +} |