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comparison src/stream/ngx_stream_realip_module.c @ 6684:9cac11efb205

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Stream: realip module.
author Dmitry Volyntsev <xeioex@nginx.com>
date Thu, 01 Sep 2016 14:45:33 +0300
parents src/http/modules/ngx_http_realip_module.c@6b1b8c4b7a95
children 3908156a51fa
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6683:b802b7e1d9bc 6684:9cac11efb205
1
2 /*
3 * Copyright (C) Igor Sysoev
4 * Copyright (C) Nginx, Inc.
5 */
6
7
8 #include <ngx_config.h>
9 #include <ngx_core.h>
10 #include <ngx_stream.h>
11
12
13 typedef struct {
14 ngx_array_t *from; /* array of ngx_cidr_t */
15 } ngx_stream_realip_srv_conf_t;
16
17
18 typedef struct {
19 struct sockaddr *sockaddr;
20 socklen_t socklen;
21 ngx_str_t addr_text;
22 } ngx_stream_realip_ctx_t;
23
24
25 static ngx_int_t ngx_stream_realip_handler(ngx_stream_session_t *s);
26 static ngx_int_t ngx_stream_realip_set_addr(ngx_stream_session_t *s,
27 ngx_addr_t *addr);
28 static char *ngx_stream_realip_from(ngx_conf_t *cf, ngx_command_t *cmd,
29 void *conf);
30 static void *ngx_stream_realip_create_srv_conf(ngx_conf_t *cf);
31 static char *ngx_stream_realip_merge_srv_conf(ngx_conf_t *cf, void *parent,
32 void *child);
33 static ngx_int_t ngx_stream_realip_add_variables(ngx_conf_t *cf);
34 static ngx_int_t ngx_stream_realip_init(ngx_conf_t *cf);
35
36
37 static ngx_int_t ngx_stream_realip_remote_addr_variable(ngx_stream_session_t *s,
38 ngx_stream_variable_value_t *v, uintptr_t data);
39 static ngx_int_t ngx_stream_realip_remote_port_variable(ngx_stream_session_t *s,
40 ngx_stream_variable_value_t *v, uintptr_t data);
41
42
43 static ngx_command_t ngx_stream_realip_commands[] = {
44
45 { ngx_string("set_real_ip_from"),
46 NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
47 ngx_stream_realip_from,
48 NGX_STREAM_SRV_CONF_OFFSET,
49 0,
50 NULL },
51
52 ngx_null_command
53 };
54
55
56 static ngx_stream_module_t ngx_stream_realip_module_ctx = {
57 ngx_stream_realip_add_variables, /* preconfiguration */
58 ngx_stream_realip_init, /* postconfiguration */
59
60 NULL, /* create main configuration */
61 NULL, /* init main configuration */
62
63 ngx_stream_realip_create_srv_conf, /* create server configuration */
64 ngx_stream_realip_merge_srv_conf /* merge server configuration */
65 };
66
67
68 ngx_module_t ngx_stream_realip_module = {
69 NGX_MODULE_V1,
70 &ngx_stream_realip_module_ctx, /* module context */
71 ngx_stream_realip_commands, /* module directives */
72 NGX_STREAM_MODULE, /* module type */
73 NULL, /* init master */
74 NULL, /* init module */
75 NULL, /* init process */
76 NULL, /* init thread */
77 NULL, /* exit thread */
78 NULL, /* exit process */
79 NULL, /* exit master */
80 NGX_MODULE_V1_PADDING
81 };
82
83
84 static ngx_stream_variable_t ngx_stream_realip_vars[] = {
85
86 { ngx_string("realip_remote_addr"), NULL,
87 ngx_stream_realip_remote_addr_variable, 0, 0, 0 },
88
89 { ngx_string("realip_remote_port"), NULL,
90 ngx_stream_realip_remote_port_variable, 0, 0, 0 },
91
92 { ngx_null_string, NULL, NULL, 0, 0, 0 }
93 };
94
95
96 static ngx_int_t
97 ngx_stream_realip_handler(ngx_stream_session_t *s)
98 {
99 ngx_addr_t addr;
100 ngx_connection_t *c;
101 ngx_stream_realip_srv_conf_t *rscf;
102
103 rscf = ngx_stream_get_module_srv_conf(s, ngx_stream_realip_module);
104
105 if (rscf->from == NULL) {
106 return NGX_DECLINED;
107 }
108
109 c = s->connection;
110
111 if (c->proxy_protocol_addr.len == 0) {
112 return NGX_DECLINED;
113 }
114
115 if (ngx_cidr_match(c->sockaddr, rscf->from) != NGX_OK) {
116 return NGX_DECLINED;
117 }
118
119 if (ngx_parse_addr(c->pool, &addr, c->proxy_protocol_addr.data,
120 c->proxy_protocol_addr.len)
121 != NGX_OK)
122 {
123 return NGX_DECLINED;
124 }
125
126 ngx_inet_set_port(addr.sockaddr, c->proxy_protocol_port);
127
128 return ngx_stream_realip_set_addr(s, &addr);
129 }
130
131
132 static ngx_int_t
133 ngx_stream_realip_set_addr(ngx_stream_session_t *s, ngx_addr_t *addr)
134 {
135 size_t len;
136 u_char *p;
137 u_char text[NGX_SOCKADDR_STRLEN];
138 ngx_connection_t *c;
139 ngx_stream_realip_ctx_t *ctx;
140
141 c = s->connection;
142
143 ctx = ngx_palloc(c->pool, sizeof(ngx_stream_realip_ctx_t));
144 if (ctx == NULL) {
145 return NGX_ERROR;
146 }
147
148 len = ngx_sock_ntop(addr->sockaddr, addr->socklen, text,
149 NGX_SOCKADDR_STRLEN, 0);
150 if (len == 0) {
151 return NGX_ERROR;
152 }
153
154 p = ngx_pnalloc(c->pool, len);
155 if (p == NULL) {
156 return NGX_ERROR;
157 }
158
159 ngx_memcpy(p, text, len);
160
161 ngx_stream_set_ctx(s, ctx, ngx_stream_realip_module);
162
163 ctx->sockaddr = c->sockaddr;
164 ctx->socklen = c->socklen;
165 ctx->addr_text = c->addr_text;
166
167 c->sockaddr = addr->sockaddr;
168 c->socklen = addr->socklen;
169 c->addr_text.len = len;
170 c->addr_text.data = p;
171
172 return NGX_DECLINED;
173 }
174
175
176 static char *
177 ngx_stream_realip_from(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
178 {
179 ngx_stream_realip_srv_conf_t *rscf = conf;
180
181 ngx_int_t rc;
182 ngx_str_t *value;
183 ngx_cidr_t *cidr;
184
185 value = cf->args->elts;
186
187 if (rscf->from == NULL) {
188 rscf->from = ngx_array_create(cf->pool, 2,
189 sizeof(ngx_cidr_t));
190 if (rscf->from == NULL) {
191 return NGX_CONF_ERROR;
192 }
193 }
194
195 cidr = ngx_array_push(rscf->from);
196 if (cidr == NULL) {
197 return NGX_CONF_ERROR;
198 }
199
200 #if (NGX_HAVE_UNIX_DOMAIN)
201
202 if (ngx_strcmp(value[1].data, "unix:") == 0) {
203 cidr->family = AF_UNIX;
204 return NGX_CONF_OK;
205 }
206
207 #endif
208
209 rc = ngx_ptocidr(&value[1], cidr);
210
211 if (rc == NGX_ERROR) {
212 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"",
213 &value[1]);
214 return NGX_CONF_ERROR;
215 }
216
217 if (rc == NGX_DONE) {
218 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
219 "low address bits of %V are meaningless", &value[1]);
220 }
221
222 return NGX_CONF_OK;
223 }
224
225
226 static void *
227 ngx_stream_realip_create_srv_conf(ngx_conf_t *cf)
228 {
229 ngx_stream_realip_srv_conf_t *conf;
230
231 conf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_realip_srv_conf_t));
232 if (conf == NULL) {
233 return NULL;
234 }
235
236 /*
237 * set by ngx_pcalloc():
238 *
239 * conf->from = NULL;
240 */
241
242 return conf;
243 }
244
245
246 static char *
247 ngx_stream_realip_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
248 {
249 ngx_stream_realip_srv_conf_t *prev = parent;
250 ngx_stream_realip_srv_conf_t *conf = child;
251
252 if (conf->from == NULL) {
253 conf->from = prev->from;
254 }
255
256 return NGX_CONF_OK;
257 }
258
259
260 static ngx_int_t
261 ngx_stream_realip_add_variables(ngx_conf_t *cf)
262 {
263 ngx_stream_variable_t *var, *v;
264
265 for (v = ngx_stream_realip_vars; v->name.len; v++) {
266 var = ngx_stream_add_variable(cf, &v->name, v->flags);
267 if (var == NULL) {
268 return NGX_ERROR;
269 }
270
271 var->get_handler = v->get_handler;
272 var->data = v->data;
273 }
274
275 return NGX_OK;
276 }
277
278
279 static ngx_int_t
280 ngx_stream_realip_init(ngx_conf_t *cf)
281 {
282 ngx_stream_core_main_conf_t *cmcf;
283
284 cmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_core_module);
285
286 cmcf->realip_handler = ngx_stream_realip_handler;
287
288 return NGX_OK;
289 }
290
291
292 static ngx_int_t
293 ngx_stream_realip_remote_addr_variable(ngx_stream_session_t *s,
294 ngx_stream_variable_value_t *v, uintptr_t data)
295 {
296 ngx_str_t *addr_text;
297 ngx_stream_realip_ctx_t *ctx;
298
299 ctx = ngx_stream_get_module_ctx(s, ngx_stream_realip_module);
300
301 addr_text = ctx ? &ctx->addr_text : &s->connection->addr_text;
302
303 v->len = addr_text->len;
304 v->valid = 1;
305 v->no_cacheable = 0;
306 v->not_found = 0;
307 v->data = addr_text->data;
308
309 return NGX_OK;
310 }
311
312
313 static ngx_int_t
314 ngx_stream_realip_remote_port_variable(ngx_stream_session_t *s,
315 ngx_stream_variable_value_t *v, uintptr_t data)
316 {
317 ngx_uint_t port;
318 struct sockaddr *sa;
319 ngx_stream_realip_ctx_t *ctx;
320
321 ctx = ngx_stream_get_module_ctx(s, ngx_stream_realip_module);
322
323 sa = ctx ? ctx->sockaddr : s->connection->sockaddr;
324
325 v->len = 0;
326 v->valid = 1;
327 v->no_cacheable = 0;
328 v->not_found = 0;
329
330 v->data = ngx_pnalloc(s->connection->pool, sizeof("65535") - 1);
331 if (v->data == NULL) {
332 return NGX_ERROR;
333 }
334
335 port = ngx_inet_get_port(sa);
336
337 if (port > 0 && port < 65536) {
338 v->len = ngx_sprintf(v->data, "%ui", port) - v->data;
339 }
340
341 return NGX_OK;
342 }