1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
/*
* Unix SMB/CIFS implementation.
*
* Copyright (C) Stefan Metzmacher 2009
*
* 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 <tevent.h>
#include "system/filesys.h"
#include "system/network.h"
#include "../lib/tsocket/tsocket.h"
#include "../libcli/util/tstream.h"
#include "../lib/util/tevent_ntstatus.h"
struct tstream_read_pdu_blob_state {
/* this structs are owned by the caller */
struct {
struct tevent_context *ev;
struct tstream_context *stream;
tstream_read_pdu_blob_full_fn_t *full_fn;
void *full_private;
} caller;
DATA_BLOB pdu_blob;
struct iovec tmp_vector;
};
static void tstream_read_pdu_blob_done(struct tevent_req *subreq);
struct tevent_req *tstream_read_pdu_blob_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct tstream_context *stream,
size_t initial_read_size,
tstream_read_pdu_blob_full_fn_t *full_fn,
void *full_private)
{
struct tevent_req *req;
struct tstream_read_pdu_blob_state *state;
struct tevent_req *subreq;
uint8_t *buf;
req = tevent_req_create(mem_ctx, &state,
struct tstream_read_pdu_blob_state);
if (!req) {
return NULL;
}
state->caller.ev = ev;
state->caller.stream = stream;
state->caller.full_fn = full_fn;
state->caller.full_private = full_private;
if (initial_read_size == 0) {
tevent_req_error(req, EINVAL);
return tevent_req_post(req, ev);
}
buf = talloc_array(state, uint8_t, initial_read_size);
if (tevent_req_nomem(buf, req)) {
return tevent_req_post(req, ev);
}
state->pdu_blob.data = buf;
state->pdu_blob.length = initial_read_size;
state->tmp_vector.iov_base = (char *) buf;
state->tmp_vector.iov_len = initial_read_size;
subreq = tstream_readv_send(state, ev, stream, &state->tmp_vector, 1);
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, tstream_read_pdu_blob_done, req);
return req;
}
static void tstream_read_pdu_blob_done(struct tevent_req *subreq)
{
struct tevent_req *req =
tevent_req_callback_data(subreq,
struct tevent_req);
struct tstream_read_pdu_blob_state *state =
tevent_req_data(req,
struct tstream_read_pdu_blob_state);
ssize_t ret;
int sys_errno;
size_t old_buf_size = state->pdu_blob.length;
size_t new_buf_size = 0;
size_t pdu_size = 0;
NTSTATUS status;
uint8_t *buf;
ret = tstream_readv_recv(subreq, &sys_errno);
TALLOC_FREE(subreq);
if (ret == -1) {
status = map_nt_error_from_unix_common(sys_errno);
tevent_req_nterror(req, status);
return;
}
status = state->caller.full_fn(state->caller.full_private,
state->pdu_blob, &pdu_size);
if (NT_STATUS_IS_OK(status)) {
tevent_req_done(req);
return;
} else if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
/* more to get */
if (pdu_size > 0) {
new_buf_size = pdu_size;
} else {
/* we don't know the size yet, so get one more byte */
new_buf_size = old_buf_size + 1;
}
} else if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return;
}
buf = talloc_realloc(state, state->pdu_blob.data, uint8_t, new_buf_size);
if (tevent_req_nomem(buf, req)) {
return;
}
state->pdu_blob.data = buf;
state->pdu_blob.length = new_buf_size;
state->tmp_vector.iov_base = (char *) (buf + old_buf_size);
state->tmp_vector.iov_len = new_buf_size - old_buf_size;
subreq = tstream_readv_send(state,
state->caller.ev,
state->caller.stream,
&state->tmp_vector,
1);
if (tevent_req_nomem(subreq, req)) {
return;
}
tevent_req_set_callback(subreq, tstream_read_pdu_blob_done, req);
}
NTSTATUS tstream_read_pdu_blob_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
DATA_BLOB *pdu_blob)
{
struct tstream_read_pdu_blob_state *state = tevent_req_data(req,
struct tstream_read_pdu_blob_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
tevent_req_received(req);
return status;
}
*pdu_blob = state->pdu_blob;
talloc_steal(mem_ctx, pdu_blob->data);
tevent_req_received(req);
return NT_STATUS_OK;
}
|
