2 * Unix SMB/CIFS implementation.
4 * Copyright (C) Stefan Metzmacher 2009
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
22 #include "system/filesys.h"
23 #include "system/network.h"
24 #include "../lib/tsocket/tsocket.h"
25 #include "../libcli/util/tstream.h"
26 #include "../lib/util/tevent_ntstatus.h"
28 struct tstream_read_pdu_blob_state {
29 /* this structs are owned by the caller */
31 struct tevent_context *ev;
32 struct tstream_context *stream;
33 tstream_read_pdu_blob_full_fn_t *full_fn;
38 struct iovec tmp_vector;
41 static void tstream_read_pdu_blob_done(struct tevent_req *subreq);
43 struct tevent_req *tstream_read_pdu_blob_send(TALLOC_CTX *mem_ctx,
44 struct tevent_context *ev,
45 struct tstream_context *stream,
46 size_t initial_read_size,
47 tstream_read_pdu_blob_full_fn_t *full_fn,
50 struct tevent_req *req;
51 struct tstream_read_pdu_blob_state *state;
52 struct tevent_req *subreq;
55 req = tevent_req_create(mem_ctx, &state,
56 struct tstream_read_pdu_blob_state);
61 state->caller.ev = ev;
62 state->caller.stream = stream;
63 state->caller.full_fn = full_fn;
64 state->caller.full_private = full_private;
66 if (initial_read_size == 0) {
67 tevent_req_error(req, EINVAL);
68 return tevent_req_post(req, ev);
71 buf = talloc_array(state, uint8_t, initial_read_size);
72 if (tevent_req_nomem(buf, req)) {
73 return tevent_req_post(req, ev);
75 state->pdu_blob.data = buf;
76 state->pdu_blob.length = initial_read_size;
78 state->tmp_vector.iov_base = (char *) buf;
79 state->tmp_vector.iov_len = initial_read_size;
81 subreq = tstream_readv_send(state, ev, stream, &state->tmp_vector, 1);
82 if (tevent_req_nomem(subreq, req)) {
83 return tevent_req_post(req, ev);
85 tevent_req_set_callback(subreq, tstream_read_pdu_blob_done, req);
90 static void tstream_read_pdu_blob_done(struct tevent_req *subreq)
92 struct tevent_req *req =
93 tevent_req_callback_data(subreq,
95 struct tstream_read_pdu_blob_state *state =
97 struct tstream_read_pdu_blob_state);
100 size_t old_buf_size = state->pdu_blob.length;
101 size_t new_buf_size = 0;
106 ret = tstream_readv_recv(subreq, &sys_errno);
109 status = map_nt_error_from_unix(sys_errno);
110 tevent_req_nterror(req, status);
114 status = state->caller.full_fn(state->caller.full_private,
115 state->pdu_blob, &pdu_size);
116 if (NT_STATUS_IS_OK(status)) {
117 tevent_req_done(req);
119 } else if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
122 new_buf_size = pdu_size;
124 /* we don't know the size yet, so get one more byte */
125 new_buf_size = old_buf_size + 1;
127 } else if (!NT_STATUS_IS_OK(status)) {
128 tevent_req_nterror(req, status);
132 buf = talloc_realloc(state, state->pdu_blob.data, uint8_t, new_buf_size);
133 if (tevent_req_nomem(buf, req)) {
136 state->pdu_blob.data = buf;
137 state->pdu_blob.length = new_buf_size;
139 state->tmp_vector.iov_base = (char *) (buf + old_buf_size);
140 state->tmp_vector.iov_len = new_buf_size - old_buf_size;
142 subreq = tstream_readv_send(state,
144 state->caller.stream,
147 if (tevent_req_nomem(subreq, req)) {
150 tevent_req_set_callback(subreq, tstream_read_pdu_blob_done, req);
153 NTSTATUS tstream_read_pdu_blob_recv(struct tevent_req *req,
157 struct tstream_read_pdu_blob_state *state = tevent_req_data(req,
158 struct tstream_read_pdu_blob_state);
161 if (tevent_req_is_nterror(req, &status)) {
162 tevent_req_received(req);
166 *pdu_blob = state->pdu_blob;
167 talloc_steal(mem_ctx, pdu_blob->data);
169 tevent_req_received(req);