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comparison src/http/modules/ngx_http_access_handler.c @ 0:f0b350454894 NGINX_0_1_0
nginx 0.1.0
*) The first public version.
author | Igor Sysoev <http://sysoev.ru> |
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date | Mon, 04 Oct 2004 00:00:00 +0400 |
parents | |
children | 46833bd150cb |
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-1:000000000000 | 0:f0b350454894 |
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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 /* AF_INET only */ | |
13 | |
14 typedef struct { | |
15 in_addr_t mask; | |
16 in_addr_t addr; | |
17 unsigned deny; | |
18 } ngx_http_access_rule_t; | |
19 | |
20 | |
21 typedef struct { | |
22 ngx_array_t *rules; /* array of ngx_http_access_rule_t */ | |
23 } ngx_http_access_loc_conf_t; | |
24 | |
25 | |
26 static ngx_int_t ngx_http_access_handler(ngx_http_request_t *r); | |
27 static char *ngx_http_access_rule(ngx_conf_t *cf, ngx_command_t *cmd, | |
28 void *conf); | |
29 static void *ngx_http_access_create_loc_conf(ngx_conf_t *cf); | |
30 static char *ngx_http_access_merge_loc_conf(ngx_conf_t *cf, | |
31 void *parent, void *child); | |
32 static ngx_int_t ngx_http_access_init(ngx_cycle_t *cycle); | |
33 | |
34 | |
35 static ngx_command_t ngx_http_access_commands[] = { | |
36 | |
37 { ngx_string("allow"), | |
38 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
39 ngx_http_access_rule, | |
40 NGX_HTTP_LOC_CONF_OFFSET, | |
41 0, | |
42 NULL }, | |
43 | |
44 { ngx_string("deny"), | |
45 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
46 ngx_http_access_rule, | |
47 NGX_HTTP_LOC_CONF_OFFSET, | |
48 0, | |
49 NULL }, | |
50 | |
51 ngx_null_command | |
52 }; | |
53 | |
54 | |
55 | |
56 ngx_http_module_t ngx_http_access_module_ctx = { | |
57 NULL, /* pre conf */ | |
58 | |
59 NULL, /* create main configuration */ | |
60 NULL, /* init main configuration */ | |
61 | |
62 NULL, /* create server configuration */ | |
63 NULL, /* merge server configuration */ | |
64 | |
65 ngx_http_access_create_loc_conf, /* create location configuration */ | |
66 ngx_http_access_merge_loc_conf /* merge location configuration */ | |
67 }; | |
68 | |
69 | |
70 ngx_module_t ngx_http_access_module = { | |
71 NGX_MODULE, | |
72 &ngx_http_access_module_ctx, /* module context */ | |
73 ngx_http_access_commands, /* module directives */ | |
74 NGX_HTTP_MODULE, /* module type */ | |
75 ngx_http_access_init, /* init module */ | |
76 NULL /* init process */ | |
77 }; | |
78 | |
79 | |
80 static ngx_int_t ngx_http_access_handler(ngx_http_request_t *r) | |
81 { | |
82 ngx_uint_t i; | |
83 struct sockaddr_in *addr_in; | |
84 ngx_http_access_rule_t *rule; | |
85 ngx_http_access_loc_conf_t *alcf; | |
86 | |
87 alcf = ngx_http_get_module_loc_conf(r, ngx_http_access_module); | |
88 | |
89 if (alcf->rules == NULL) { | |
90 return NGX_OK; | |
91 } | |
92 | |
93 /* AF_INET only */ | |
94 | |
95 addr_in = (struct sockaddr_in *) r->connection->sockaddr; | |
96 | |
97 rule = alcf->rules->elts; | |
98 for (i = 0; i < alcf->rules->nelts; i++) { | |
99 | |
100 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "%08X %08X %08X", | |
101 addr_in->sin_addr.s_addr, rule[i].mask, rule[i].addr); | |
102 | |
103 if ((addr_in->sin_addr.s_addr & rule[i].mask) == rule[i].addr) { | |
104 if (rule[i].deny) { | |
105 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, | |
106 "access forbidden by rule"); | |
107 | |
108 return NGX_HTTP_FORBIDDEN; | |
109 } | |
110 | |
111 return NGX_OK; | |
112 } | |
113 } | |
114 | |
115 return NGX_OK; | |
116 } | |
117 | |
118 | |
119 static char *ngx_http_access_rule(ngx_conf_t *cf, ngx_command_t *cmd, | |
120 void *conf) | |
121 { | |
122 ngx_http_access_loc_conf_t *alcf = conf; | |
123 | |
124 ngx_str_t *value; | |
125 ngx_inet_cidr_t in_cidr; | |
126 ngx_http_access_rule_t *rule; | |
127 | |
128 if (alcf->rules == NULL) { | |
129 alcf->rules = ngx_create_array(cf->pool, 5, | |
130 sizeof(ngx_http_access_rule_t)); | |
131 if (alcf->rules == NULL) { | |
132 return NGX_CONF_ERROR; | |
133 } | |
134 } | |
135 | |
136 if (!(rule = ngx_push_array(alcf->rules))) { | |
137 return NGX_CONF_ERROR; | |
138 } | |
139 | |
140 value = cf->args->elts; | |
141 | |
142 rule->deny = (value[0].data[0] == 'd') ? 1 : 0; | |
143 | |
144 if (value[1].len == 3 && ngx_strcmp(value[1].data, "all") == 0) { | |
145 rule->mask = 0; | |
146 rule->addr = 0; | |
147 | |
148 return NGX_CONF_OK; | |
149 } | |
150 | |
151 rule->addr = inet_addr((char *) value[1].data); | |
152 | |
153 if (rule->addr != INADDR_NONE) { | |
154 rule->mask = 0xffffffff; | |
155 | |
156 return NGX_CONF_OK; | |
157 } | |
158 | |
159 if (ngx_ptocidr(&value[1], &in_cidr) == NGX_ERROR) { | |
160 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid paramter \"%s\"", | |
161 value[1].data); | |
162 return NGX_CONF_ERROR; | |
163 } | |
164 | |
165 rule->mask = in_cidr.mask; | |
166 rule->addr = in_cidr.addr; | |
167 | |
168 return NGX_CONF_OK; | |
169 } | |
170 | |
171 | |
172 static void *ngx_http_access_create_loc_conf(ngx_conf_t *cf) | |
173 { | |
174 ngx_http_access_loc_conf_t *conf; | |
175 | |
176 if (!(conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_access_loc_conf_t)))) { | |
177 return NGX_CONF_ERROR; | |
178 } | |
179 | |
180 return conf; | |
181 } | |
182 | |
183 | |
184 static char *ngx_http_access_merge_loc_conf(ngx_conf_t *cf, | |
185 void *parent, void *child) | |
186 { | |
187 ngx_http_access_loc_conf_t *prev = parent; | |
188 ngx_http_access_loc_conf_t *conf = child; | |
189 | |
190 if (conf->rules == NULL) { | |
191 conf->rules = prev->rules; | |
192 } | |
193 | |
194 return NGX_CONF_OK; | |
195 } | |
196 | |
197 | |
198 static ngx_int_t ngx_http_access_init(ngx_cycle_t *cycle) | |
199 { | |
200 ngx_http_handler_pt *h; | |
201 ngx_http_core_main_conf_t *cmcf; | |
202 | |
203 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module); | |
204 | |
205 h = ngx_push_array(&cmcf->phases[NGX_HTTP_ACCESS_PHASE].handlers); | |
206 if (h == NULL) { | |
207 return NGX_ERROR; | |
208 } | |
209 | |
210 *h = ngx_http_access_handler; | |
211 | |
212 return NGX_OK; | |
213 } |