|
50
|
1
|
|
|
2 /*
|
|
|
3 * Copyright (C) Igor Sysoev
|
|
|
4 */
|
|
|
5
|
|
|
6
|
|
|
7 #include <ngx_config.h>
|
|
|
8 #include <ngx_core.h>
|
|
|
9 #include <ngx_http.h>
|
|
|
10
|
|
|
11
|
|
|
12 typedef struct {
|
|
552
|
13 in_addr_t mask;
|
|
|
14 in_addr_t addr;
|
|
|
15 ngx_uint_t deny; /* unsigned deny:1; */
|
|
50
|
16 } ngx_http_access_rule_t;
|
|
|
17
|
|
552
|
18 #if (NGX_HAVE_INET6)
|
|
50
|
19
|
|
|
20 typedef struct {
|
|
552
|
21 struct in6_addr addr;
|
|
|
22 struct in6_addr mask;
|
|
|
23 ngx_uint_t deny; /* unsigned deny:1; */
|
|
|
24 } ngx_http_access_rule6_t;
|
|
|
25
|
|
|
26 #endif
|
|
|
27
|
|
|
28 typedef struct {
|
|
|
29 ngx_array_t *rules; /* array of ngx_http_access_rule_t */
|
|
|
30 #if (NGX_HAVE_INET6)
|
|
|
31 ngx_array_t *rules6; /* array of ngx_http_access_rule6_t */
|
|
|
32 #endif
|
|
50
|
33 } ngx_http_access_loc_conf_t;
|
|
|
34
|
|
|
35
|
|
|
36 static ngx_int_t ngx_http_access_handler(ngx_http_request_t *r);
|
|
552
|
37 static ngx_int_t ngx_http_access_inet(ngx_http_request_t *r,
|
|
|
38 ngx_http_access_loc_conf_t *alcf, in_addr_t addr);
|
|
|
39 #if (NGX_HAVE_INET6)
|
|
|
40 static ngx_int_t ngx_http_access_inet6(ngx_http_request_t *r,
|
|
|
41 ngx_http_access_loc_conf_t *alcf, u_char *p);
|
|
|
42 #endif
|
|
|
43 static ngx_int_t ngx_http_access_found(ngx_http_request_t *r, ngx_uint_t deny);
|
|
50
|
44 static char *ngx_http_access_rule(ngx_conf_t *cf, ngx_command_t *cmd,
|
|
|
45 void *conf);
|
|
|
46 static void *ngx_http_access_create_loc_conf(ngx_conf_t *cf);
|
|
|
47 static char *ngx_http_access_merge_loc_conf(ngx_conf_t *cf,
|
|
|
48 void *parent, void *child);
|
|
230
|
49 static ngx_int_t ngx_http_access_init(ngx_conf_t *cf);
|
|
50
|
50
|
|
|
51
|
|
|
52 static ngx_command_t ngx_http_access_commands[] = {
|
|
|
53
|
|
|
54 { ngx_string("allow"),
|
|
180
|
55 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF
|
|
|
56 |NGX_CONF_TAKE1,
|
|
50
|
57 ngx_http_access_rule,
|
|
|
58 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
59 0,
|
|
|
60 NULL },
|
|
|
61
|
|
|
62 { ngx_string("deny"),
|
|
180
|
63 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF
|
|
|
64 |NGX_CONF_TAKE1,
|
|
50
|
65 ngx_http_access_rule,
|
|
|
66 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
67 0,
|
|
|
68 NULL },
|
|
|
69
|
|
|
70 ngx_null_command
|
|
|
71 };
|
|
|
72
|
|
|
73
|
|
|
74
|
|
216
|
75 static ngx_http_module_t ngx_http_access_module_ctx = {
|
|
58
|
76 NULL, /* preconfiguration */
|
|
230
|
77 ngx_http_access_init, /* postconfiguration */
|
|
50
|
78
|
|
|
79 NULL, /* create main configuration */
|
|
|
80 NULL, /* init main configuration */
|
|
|
81
|
|
|
82 NULL, /* create server configuration */
|
|
|
83 NULL, /* merge server configuration */
|
|
|
84
|
|
|
85 ngx_http_access_create_loc_conf, /* create location configuration */
|
|
|
86 ngx_http_access_merge_loc_conf /* merge location configuration */
|
|
|
87 };
|
|
|
88
|
|
|
89
|
|
|
90 ngx_module_t ngx_http_access_module = {
|
|
58
|
91 NGX_MODULE_V1,
|
|
50
|
92 &ngx_http_access_module_ctx, /* module context */
|
|
|
93 ngx_http_access_commands, /* module directives */
|
|
|
94 NGX_HTTP_MODULE, /* module type */
|
|
90
|
95 NULL, /* init master */
|
|
230
|
96 NULL, /* init module */
|
|
90
|
97 NULL, /* init process */
|
|
|
98 NULL, /* init thread */
|
|
|
99 NULL, /* exit thread */
|
|
|
100 NULL, /* exit process */
|
|
|
101 NULL, /* exit master */
|
|
|
102 NGX_MODULE_V1_PADDING
|
|
50
|
103 };
|
|
|
104
|
|
|
105
|
|
|
106 static ngx_int_t
|
|
|
107 ngx_http_access_handler(ngx_http_request_t *r)
|
|
|
108 {
|
|
|
109 struct sockaddr_in *sin;
|
|
|
110 ngx_http_access_loc_conf_t *alcf;
|
|
|
111
|
|
|
112 alcf = ngx_http_get_module_loc_conf(r, ngx_http_access_module);
|
|
|
113
|
|
552
|
114 #if (NGX_HAVE_INET6)
|
|
|
115
|
|
|
116 if (alcf->rules6 && r->connection->sockaddr->sa_family == AF_INET6) {
|
|
|
117 u_char *p;
|
|
|
118 in_addr_t addr;
|
|
|
119 struct sockaddr_in6 *sin6;
|
|
|
120
|
|
|
121 sin6 = (struct sockaddr_in6 *) r->connection->sockaddr;
|
|
|
122 p = sin6->sin6_addr.s6_addr;
|
|
|
123
|
|
|
124 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
|
|
|
125 addr = p[12] << 24;
|
|
|
126 addr += p[13] << 16;
|
|
|
127 addr += p[14] << 8;
|
|
|
128 addr += p[15];
|
|
|
129 return ngx_http_access_inet(r, alcf, htonl(addr));
|
|
|
130 }
|
|
|
131
|
|
|
132 return ngx_http_access_inet6(r, alcf, p);
|
|
50
|
133 }
|
|
|
134
|
|
552
|
135 #endif
|
|
50
|
136
|
|
552
|
137 if (alcf->rules && r->connection->sockaddr->sa_family == AF_INET) {
|
|
|
138 sin = (struct sockaddr_in *) r->connection->sockaddr;
|
|
|
139 return ngx_http_access_inet(r, alcf, sin->sin_addr.s_addr);
|
|
457
|
140 }
|
|
|
141
|
|
552
|
142 return NGX_DECLINED;
|
|
|
143 }
|
|
|
144
|
|
|
145
|
|
|
146 static ngx_int_t
|
|
|
147 ngx_http_access_inet(ngx_http_request_t *r, ngx_http_access_loc_conf_t *alcf,
|
|
|
148 in_addr_t addr)
|
|
|
149 {
|
|
|
150 ngx_uint_t i;
|
|
|
151 ngx_http_access_rule_t *rule;
|
|
50
|
152
|
|
|
153 rule = alcf->rules->elts;
|
|
|
154 for (i = 0; i < alcf->rules->nelts; i++) {
|
|
|
155
|
|
|
156 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
122
|
157 "access: %08XD %08XD %08XD",
|
|
552
|
158 addr, rule[i].mask, rule[i].addr);
|
|
212
|
159
|
|
552
|
160 if ((addr & rule[i].mask) == rule[i].addr) {
|
|
|
161 return ngx_http_access_found(r, rule[i].deny);
|
|
50
|
162 }
|
|
|
163 }
|
|
|
164
|
|
358
|
165 return NGX_DECLINED;
|
|
50
|
166 }
|
|
|
167
|
|
|
168
|
|
552
|
169 #if (NGX_HAVE_INET6)
|
|
|
170
|
|
|
171 static ngx_int_t
|
|
|
172 ngx_http_access_inet6(ngx_http_request_t *r, ngx_http_access_loc_conf_t *alcf,
|
|
|
173 u_char *p)
|
|
|
174 {
|
|
|
175 ngx_uint_t n;
|
|
|
176 ngx_uint_t i;
|
|
|
177 ngx_http_access_rule6_t *rule6;
|
|
|
178
|
|
|
179 rule6 = alcf->rules6->elts;
|
|
|
180 for (i = 0; i < alcf->rules6->nelts; i++) {
|
|
|
181
|
|
|
182 #if (NGX_DEBUG)
|
|
|
183 {
|
|
|
184 size_t cl, ml, al;
|
|
|
185 u_char ct[NGX_INET6_ADDRSTRLEN];
|
|
|
186 u_char mt[NGX_INET6_ADDRSTRLEN];
|
|
|
187 u_char at[NGX_INET6_ADDRSTRLEN];
|
|
|
188
|
|
|
189 cl = ngx_inet6_ntop(p, ct, NGX_INET6_ADDRSTRLEN);
|
|
|
190 ml = ngx_inet6_ntop(rule6[i].mask.s6_addr, mt, NGX_INET6_ADDRSTRLEN);
|
|
|
191 al = ngx_inet6_ntop(rule6[i].addr.s6_addr, at, NGX_INET6_ADDRSTRLEN);
|
|
|
192
|
|
|
193 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
194 "access: %*s %*s %*s", cl, ct, ml, mt, al, at);
|
|
|
195 }
|
|
|
196 #endif
|
|
|
197
|
|
|
198 for (n = 0; n < 16; n++) {
|
|
|
199 if ((p[n] & rule6[i].mask.s6_addr[n]) != rule6[i].addr.s6_addr[n]) {
|
|
|
200 goto next;
|
|
|
201 }
|
|
|
202 }
|
|
|
203
|
|
|
204 return ngx_http_access_found(r, rule6[i].deny);
|
|
|
205
|
|
|
206 next:
|
|
|
207 continue;
|
|
|
208 }
|
|
|
209
|
|
|
210 return NGX_DECLINED;
|
|
|
211 }
|
|
|
212
|
|
|
213 #endif
|
|
|
214
|
|
|
215
|
|
|
216 static ngx_int_t
|
|
|
217 ngx_http_access_found(ngx_http_request_t *r, ngx_uint_t deny)
|
|
|
218 {
|
|
|
219 ngx_http_core_loc_conf_t *clcf;
|
|
|
220
|
|
|
221 if (deny) {
|
|
|
222 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
|
223
|
|
|
224 if (clcf->satisfy == NGX_HTTP_SATISFY_ALL) {
|
|
|
225 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
226 "access forbidden by rule");
|
|
|
227 }
|
|
|
228
|
|
|
229 return NGX_HTTP_FORBIDDEN;
|
|
|
230 }
|
|
|
231
|
|
|
232 return NGX_OK;
|
|
|
233 }
|
|
|
234
|
|
|
235
|
|
50
|
236 static char *
|
|
|
237 ngx_http_access_rule(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
238 {
|
|
|
239 ngx_http_access_loc_conf_t *alcf = conf;
|
|
|
240
|
|
552
|
241 ngx_int_t rc;
|
|
|
242 ngx_uint_t all;
|
|
|
243 ngx_str_t *value;
|
|
|
244 ngx_cidr_t cidr;
|
|
|
245 ngx_http_access_rule_t *rule;
|
|
|
246 #if (NGX_HAVE_INET6)
|
|
|
247 ngx_http_access_rule6_t *rule6;
|
|
|
248 #endif
|
|
50
|
249
|
|
552
|
250 ngx_memzero(&cidr, sizeof(ngx_cidr_t));
|
|
50
|
251
|
|
|
252 value = cf->args->elts;
|
|
|
253
|
|
552
|
254 all = (value[1].len == 3 && ngx_strcmp(value[1].data, "all") == 0);
|
|
|
255
|
|
|
256 if (!all) {
|
|
|
257
|
|
|
258 rc = ngx_ptocidr(&value[1], &cidr);
|
|
50
|
259
|
|
552
|
260 if (rc == NGX_ERROR) {
|
|
|
261 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
262 "invalid parameter \"%V\"", &value[1]);
|
|
|
263 return NGX_CONF_ERROR;
|
|
|
264 }
|
|
50
|
265
|
|
552
|
266 if (rc == NGX_DONE) {
|
|
|
267 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
|
|
|
268 "low address bits of %V are meaningless", &value[1]);
|
|
|
269 }
|
|
50
|
270 }
|
|
|
271
|
|
552
|
272 switch (cidr.family) {
|
|
|
273
|
|
|
274 #if (NGX_HAVE_INET6)
|
|
|
275 case AF_INET6:
|
|
|
276 case 0: /* all */
|
|
326
|
277
|
|
552
|
278 if (alcf->rules6 == NULL) {
|
|
|
279 alcf->rules6 = ngx_array_create(cf->pool, 4,
|
|
|
280 sizeof(ngx_http_access_rule6_t));
|
|
|
281 if (alcf->rules6 == NULL) {
|
|
|
282 return NGX_CONF_ERROR;
|
|
|
283 }
|
|
|
284 }
|
|
|
285
|
|
|
286 rule6 = ngx_array_push(alcf->rules6);
|
|
|
287 if (rule6 == NULL) {
|
|
|
288 return NGX_CONF_ERROR;
|
|
|
289 }
|
|
|
290
|
|
|
291 rule6->mask = cidr.u.in6.mask;
|
|
|
292 rule6->addr = cidr.u.in6.addr;
|
|
|
293 rule6->deny = (value[0].data[0] == 'd') ? 1 : 0;
|
|
50
|
294
|
|
552
|
295 if (!all) {
|
|
|
296 break;
|
|
|
297 }
|
|
|
298
|
|
|
299 /* "all" passes through */
|
|
|
300 #endif
|
|
|
301
|
|
|
302 default: /* AF_INET */
|
|
463
|
303
|
|
552
|
304 if (alcf->rules == NULL) {
|
|
|
305 alcf->rules = ngx_array_create(cf->pool, 4,
|
|
|
306 sizeof(ngx_http_access_rule_t));
|
|
|
307 if (alcf->rules == NULL) {
|
|
|
308 return NGX_CONF_ERROR;
|
|
|
309 }
|
|
|
310 }
|
|
|
311
|
|
|
312 rule = ngx_array_push(alcf->rules);
|
|
|
313 if (rule == NULL) {
|
|
|
314 return NGX_CONF_ERROR;
|
|
|
315 }
|
|
|
316
|
|
|
317 rule->mask = cidr.u.in.mask;
|
|
|
318 rule->addr = cidr.u.in.addr;
|
|
|
319 rule->deny = (value[0].data[0] == 'd') ? 1 : 0;
|
|
326
|
320 }
|
|
|
321
|
|
50
|
322 return NGX_CONF_OK;
|
|
|
323 }
|
|
|
324
|
|
|
325
|
|
|
326 static void *
|
|
|
327 ngx_http_access_create_loc_conf(ngx_conf_t *cf)
|
|
|
328 {
|
|
|
329 ngx_http_access_loc_conf_t *conf;
|
|
|
330
|
|
|
331 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_access_loc_conf_t));
|
|
|
332 if (conf == NULL) {
|
|
505
|
333 return NULL;
|
|
50
|
334 }
|
|
|
335
|
|
|
336 return conf;
|
|
|
337 }
|
|
|
338
|
|
|
339
|
|
|
340 static char *
|
|
|
341 ngx_http_access_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
342 {
|
|
|
343 ngx_http_access_loc_conf_t *prev = parent;
|
|
|
344 ngx_http_access_loc_conf_t *conf = child;
|
|
|
345
|
|
|
346 if (conf->rules == NULL) {
|
|
|
347 conf->rules = prev->rules;
|
|
|
348 }
|
|
|
349
|
|
552
|
350 #if (NGX_HAVE_INET6)
|
|
|
351 if (conf->rules6 == NULL) {
|
|
|
352 conf->rules6 = prev->rules6;
|
|
|
353 }
|
|
|
354 #endif
|
|
|
355
|
|
50
|
356 return NGX_CONF_OK;
|
|
|
357 }
|
|
|
358
|
|
|
359
|
|
|
360 static ngx_int_t
|
|
230
|
361 ngx_http_access_init(ngx_conf_t *cf)
|
|
50
|
362 {
|
|
|
363 ngx_http_handler_pt *h;
|
|
|
364 ngx_http_core_main_conf_t *cmcf;
|
|
|
365
|
|
230
|
366 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
|
|
50
|
367
|
|
|
368 h = ngx_array_push(&cmcf->phases[NGX_HTTP_ACCESS_PHASE].handlers);
|
|
|
369 if (h == NULL) {
|
|
|
370 return NGX_ERROR;
|
|
|
371 }
|
|
|
372
|
|
|
373 *h = ngx_http_access_handler;
|
|
|
374
|
|
|
375 return NGX_OK;
|
|
|
376 }
|
