Mercurial > hg > nginx
view src/http/modules/ngx_http_access_module.c @ 1417:b23a80f9a7b8
set current peer to use it in ngx_http_upstream_free_round_robin_peer()
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 24 Aug 2007 15:29:50 +0000 |
parents | b590a528fd41 |
children | adca43955f79 |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> /* AF_INET only */ typedef struct { in_addr_t mask; in_addr_t addr; ngx_uint_t deny; /* unsigned deny:1; */ } ngx_http_access_rule_t; typedef struct { ngx_array_t *rules; /* array of ngx_http_access_rule_t */ } ngx_http_access_loc_conf_t; static ngx_int_t ngx_http_access_handler(ngx_http_request_t *r); static char *ngx_http_access_rule(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static void *ngx_http_access_create_loc_conf(ngx_conf_t *cf); static char *ngx_http_access_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child); static ngx_int_t ngx_http_access_init(ngx_conf_t *cf); static ngx_command_t ngx_http_access_commands[] = { { ngx_string("allow"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF |NGX_CONF_TAKE1, ngx_http_access_rule, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, { ngx_string("deny"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF |NGX_CONF_TAKE1, ngx_http_access_rule, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, ngx_null_command }; static ngx_http_module_t ngx_http_access_module_ctx = { NULL, /* preconfiguration */ ngx_http_access_init, /* postconfiguration */ NULL, /* create main configuration */ NULL, /* init main configuration */ NULL, /* create server configuration */ NULL, /* merge server configuration */ ngx_http_access_create_loc_conf, /* create location configuration */ ngx_http_access_merge_loc_conf /* merge location configuration */ }; ngx_module_t ngx_http_access_module = { NGX_MODULE_V1, &ngx_http_access_module_ctx, /* module context */ ngx_http_access_commands, /* module directives */ NGX_HTTP_MODULE, /* module type */ NULL, /* init master */ NULL, /* init module */ NULL, /* init process */ NULL, /* init thread */ NULL, /* exit thread */ NULL, /* exit process */ NULL, /* exit master */ NGX_MODULE_V1_PADDING }; static ngx_int_t ngx_http_access_handler(ngx_http_request_t *r) { ngx_uint_t i; struct sockaddr_in *sin; ngx_http_access_rule_t *rule; ngx_http_core_loc_conf_t *clcf; ngx_http_access_loc_conf_t *alcf; alcf = ngx_http_get_module_loc_conf(r, ngx_http_access_module); if (alcf->rules == NULL) { return NGX_OK; } /* AF_INET only */ sin = (struct sockaddr_in *) r->connection->sockaddr; rule = alcf->rules->elts; for (i = 0; i < alcf->rules->nelts; i++) { ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "access: %08XD %08XD %08XD", sin->sin_addr.s_addr, rule[i].mask, rule[i].addr); if ((sin->sin_addr.s_addr & rule[i].mask) == rule[i].addr) { if (rule[i].deny) { clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); if (!clcf->satisfy_any) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "access forbidden by rule"); } return NGX_HTTP_FORBIDDEN; } return NGX_OK; } } return NGX_OK; } static char * ngx_http_access_rule(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_access_loc_conf_t *alcf = conf; ngx_int_t rc; ngx_str_t *value; ngx_inet_cidr_t in_cidr; ngx_http_access_rule_t *rule; if (alcf->rules == NULL) { alcf->rules = ngx_array_create(cf->pool, 4, sizeof(ngx_http_access_rule_t)); if (alcf->rules == NULL) { return NGX_CONF_ERROR; } } rule = ngx_array_push(alcf->rules); if (rule == NULL) { return NGX_CONF_ERROR; } value = cf->args->elts; rule->deny = (value[0].data[0] == 'd') ? 1 : 0; if (value[1].len == 3 && ngx_strcmp(value[1].data, "all") == 0) { rule->mask = 0; rule->addr = 0; return NGX_CONF_OK; } rule->addr = inet_addr((char *) value[1].data); if (rule->addr != INADDR_NONE) { rule->mask = 0xffffffff; return NGX_CONF_OK; } rc = ngx_ptocidr(&value[1], &in_cidr); if (rc == NGX_ERROR) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"", &value[1]); return NGX_CONF_ERROR; } if (rc == NGX_DONE) { ngx_conf_log_error(NGX_LOG_WARN, cf, 0, "low address bits of %V are meaningless", &value[1]); } rule->mask = in_cidr.mask; rule->addr = in_cidr.addr; return NGX_CONF_OK; } static void * ngx_http_access_create_loc_conf(ngx_conf_t *cf) { ngx_http_access_loc_conf_t *conf; conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_access_loc_conf_t)); if (conf == NULL) { return NGX_CONF_ERROR; } return conf; } static char * ngx_http_access_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_http_access_loc_conf_t *prev = parent; ngx_http_access_loc_conf_t *conf = child; if (conf->rules == NULL) { conf->rules = prev->rules; } return NGX_CONF_OK; } static ngx_int_t ngx_http_access_init(ngx_conf_t *cf) { ngx_http_handler_pt *h; ngx_http_core_main_conf_t *cmcf; cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); h = ngx_array_push(&cmcf->phases[NGX_HTTP_ACCESS_PHASE].handlers); if (h == NULL) { return NGX_ERROR; } *h = ngx_http_access_handler; return NGX_OK; }