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
|
/*
Unix SMB/CIFS implementation.
broadcast name resolution module
Copyright (C) Andrew Tridgell 2005
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "system/network.h"
#include "libcli/raw/libcliraw.h"
#include "libcli/nbt/libnbt.h"
#include "libcli/composite/composite.h"
struct bcast_state {
struct nbt_name name;
struct nbt_name_socket *nbtsock;
int num_queries;
struct nbt_name_request **queries;
struct nbt_name_query *io_queries;
const char *reply_addr;
};
/*
handle events during broadcast name resolution
*/
static void bcast_handler(struct nbt_name_request *req)
{
struct smbcli_composite *c = talloc_get_type(req->async.private,
struct smbcli_composite);
struct bcast_state *state = talloc_get_type(c->private, struct bcast_state);
int i;
for (i=0;i<state->num_queries;i++) {
if (req == state->queries[i]) break;
}
if (i == state->num_queries) {
/* not for us?! */
c->status = NT_STATUS_INTERNAL_ERROR;
c->state = SMBCLI_REQUEST_ERROR;
goto done;
}
c->status = nbt_name_query_recv(req, state, &state->io_queries[i]);
if (!NT_STATUS_IS_OK(c->status)) {
c->state = SMBCLI_REQUEST_ERROR;
} else {
c->state = SMBCLI_REQUEST_DONE;
state->reply_addr = talloc_steal(state, state->io_queries[i].out.reply_addr);
}
done:
talloc_free(state->nbtsock);
if (c->async.fn) {
c->async.fn(c);
}
}
/*
broadcast name resolution method - async send
*/
struct smbcli_composite *resolve_name_bcast_send(struct nbt_name *name,
struct event_context *event_ctx)
{
struct smbcli_composite *c;
struct bcast_state *state;
int i;
NTSTATUS status;
c = talloc_zero(NULL, struct smbcli_composite);
if (c == NULL) goto failed;
state = talloc(c, struct bcast_state);
if (state == NULL) goto failed;
status = nbt_name_dup(state, name, &state->name);
if (!NT_STATUS_IS_OK(status)) goto failed;
state->nbtsock = nbt_name_socket_init(state, event_ctx);
if (state->nbtsock == NULL) goto failed;
state->num_queries = iface_count();
state->io_queries = talloc_array(state, struct nbt_name_query, state->num_queries);
if (!state->io_queries) goto failed;
state->queries = talloc_array(state, struct nbt_name_request *, state->num_queries);
if (!state->queries) goto failed;
for (i=0;i<state->num_queries;i++) {
struct ipv4_addr *ip = iface_n_bcast(i);
const char *addr = sys_inet_ntoa(*ip);
if (!addr) goto failed;
state->io_queries[i].in.name = state->name;
state->io_queries[i].in.dest_addr = talloc_strdup(state->io_queries, addr);
if (!state->io_queries[i].in.dest_addr) goto failed;
state->io_queries[i].in.broadcast = True;
state->io_queries[i].in.wins_lookup = False;
state->io_queries[i].in.timeout = lp_parm_int(-1, "nbt", "bcastTimeout", 5);
state->queries[i] = nbt_name_query_send(state->nbtsock, &state->io_queries[i]);
if (!state->queries[i]) goto failed;
state->queries[i]->async.fn = bcast_handler;
state->queries[i]->async.private = c;
}
c->state = SMBCLI_REQUEST_SEND;
c->private = state;
c->event_ctx = state->nbtsock->event_ctx;
return c;
failed:
talloc_free(c);
return NULL;
}
/*
broadcast name resolution method - recv side
*/
NTSTATUS resolve_name_bcast_recv(struct smbcli_composite *c,
TALLOC_CTX *mem_ctx, const char **reply_addr)
{
NTSTATUS status;
status = smb_composite_wait(c);
if (NT_STATUS_IS_OK(status)) {
struct bcast_state *state = talloc_get_type(c->private, struct bcast_state);
*reply_addr = talloc_steal(mem_ctx, state->reply_addr);
}
talloc_free(c);
return status;
}
/*
broadcast name resolution method - sync call
*/
NTSTATUS resolve_name_bcast(struct nbt_name *name,
TALLOC_CTX *mem_ctx,
const char **reply_addr)
{
struct smbcli_composite *c = resolve_name_bcast_send(name, NULL);
return resolve_name_bcast_recv(c, mem_ctx, reply_addr);
}
|
