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
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*-
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "lua_common.h"
#include "lua_dns_resolver.h"
#include "lua_thread_pool.h"
LUA_FUNCTION_DEF(dns, request);
static const struct luaL_reg dns_f[] = {
LUA_INTERFACE_DEF(dns, request),
{"__tostring", rspamd_lua_class_tostring},
{NULL, NULL}};
static const gchar *M = "rspamd lua dns";
void lua_dns_callback(struct rdns_reply *reply, void *arg);
struct lua_rspamd_dns_cbdata {
struct thread_entry *thread;
struct rspamd_task *task;
struct rspamd_dns_resolver *resolver;
struct rspamd_symcache_dynamic_item *item;
struct rspamd_async_session *s;
};
static gint
lua_dns_request(lua_State *L)
{
GError *err = NULL;
struct rspamd_async_session *session = NULL;
struct rspamd_config *cfg = NULL;
struct lua_rspamd_dns_cbdata *cbdata = NULL;
const gchar *to_resolve = NULL;
const gchar *type_str = NULL;
struct rspamd_task *task = NULL;
rspamd_mempool_t *pool = NULL;
gint ret = 0;
gboolean forced = FALSE;
/* Check arguments */
if (!rspamd_lua_parse_table_arguments(L, 1, &err,
RSPAMD_LUA_PARSE_ARGUMENTS_DEFAULT,
"*name=S;task=U{task};*type=S;forced=B;session=U{session};config=U{config}",
&to_resolve,
&task,
&type_str,
&forced,
&session,
&cfg)) {
if (err) {
ret = luaL_error(L, "invalid arguments: %s", err->message);
g_error_free(err);
return ret;
}
return luaL_error(L, "invalid arguments");
}
if (task) {
session = task->s;
pool = task->task_pool;
cfg = task->cfg;
}
else if (session && cfg) {
pool = cfg->cfg_pool;
}
else {
return luaL_error(L, "invalid arguments: either task or session/config should be set");
}
enum rdns_request_type type = rdns_type_fromstr(type_str);
if (type == RDNS_REQUEST_INVALID) {
return luaL_error(L, "invalid arguments: this record type is not supported");
}
cbdata = rspamd_mempool_alloc0(pool, sizeof(*cbdata));
cbdata->task = task;
if (type == RDNS_REQUEST_PTR) {
char *ptr_str;
ptr_str = rdns_generate_ptr_from_str(to_resolve);
if (ptr_str == NULL) {
msg_err_task_check("wrong resolve string to PTR request: %s",
to_resolve);
lua_pushnil(L);
return 1;
}
to_resolve = rspamd_mempool_strdup(pool, ptr_str);
free(ptr_str);
}
if (task == NULL) {
ret = (rspamd_dns_resolver_request(cfg->dns_resolver,
session,
pool,
lua_dns_callback,
cbdata,
type,
to_resolve) != NULL);
}
else {
if (forced) {
ret = rspamd_dns_resolver_request_task_forced(task,
lua_dns_callback,
cbdata,
type,
to_resolve);
}
else {
ret = rspamd_dns_resolver_request_task(task,
lua_dns_callback,
cbdata,
type,
to_resolve);
}
}
if (ret) {
cbdata->thread = lua_thread_pool_get_running_entry(cfg->lua_thread_pool);
cbdata->s = session;
if (task) {
cbdata->item = rspamd_symcache_get_cur_item(task);
rspamd_symcache_item_async_inc(task, cbdata->item, M);
}
return lua_thread_yield(cbdata->thread, 0);
}
else {
lua_pushnil(L);
return 1;
}
}
void lua_dns_callback(struct rdns_reply *reply, void *arg)
{
struct lua_rspamd_dns_cbdata *cbdata = arg;
lua_State *L = cbdata->thread->lua_state;
if (reply->code != RDNS_RC_NOERROR) {
lua_pushboolean(L, false);
lua_pushstring(L, rdns_strerror(reply->code));
}
else {
lua_push_dns_reply(L, reply);
lua_pushboolean(L, reply->flags & RDNS_AUTH);
lua_setfield(L, -3, "authenticated");
lua_pushboolean(L, reply->flags & RDNS_TRUNCATED);
lua_setfield(L, -3, "truncated");
/* result 1 - not and error */
lua_pushboolean(L, true);
/* push table into stack, result 2 - results itself */
lua_pushvalue(L, -3);
}
lua_thread_resume(cbdata->thread, 2);
if (cbdata->item) {
rspamd_symcache_item_async_dec_check(cbdata->task, cbdata->item, M);
}
}
static gint
lua_load_dns(lua_State *L)
{
lua_newtable(L);
luaL_register(L, NULL, dns_f);
return 1;
}
void luaopen_dns(lua_State *L)
{
rspamd_lua_add_preload(L, "rspamd_dns", lua_load_dns);
}
|
