Mercurial > hg > nginx-quic
view src/http/modules/ngx_http_access_module.c @ 4360:7447784028a7 stable-1.0
Merge of r4284:
Introduction of simple ngx_write_stderr() instead of ngx_log_stderr()
for output of ./configure options, etc., since ngx_log_stderr() output
length is limited by 2048 characters defined as NGX_MAX_ERROR_STR.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Wed, 14 Dec 2011 15:23:23 +0000 |
parents | bab3488bd113 |
children | d620f497c50f |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> typedef struct { in_addr_t mask; in_addr_t addr; ngx_uint_t deny; /* unsigned deny:1; */ } ngx_http_access_rule_t; #if (NGX_HAVE_INET6) typedef struct { struct in6_addr addr; struct in6_addr mask; ngx_uint_t deny; /* unsigned deny:1; */ } ngx_http_access_rule6_t; #endif typedef struct { ngx_array_t *rules; /* array of ngx_http_access_rule_t */ #if (NGX_HAVE_INET6) ngx_array_t *rules6; /* array of ngx_http_access_rule6_t */ #endif } ngx_http_access_loc_conf_t; static ngx_int_t ngx_http_access_handler(ngx_http_request_t *r); static ngx_int_t ngx_http_access_inet(ngx_http_request_t *r, ngx_http_access_loc_conf_t *alcf, in_addr_t addr); #if (NGX_HAVE_INET6) static ngx_int_t ngx_http_access_inet6(ngx_http_request_t *r, ngx_http_access_loc_conf_t *alcf, u_char *p); #endif static ngx_int_t ngx_http_access_found(ngx_http_request_t *r, ngx_uint_t deny); 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) { struct sockaddr_in *sin; ngx_http_access_loc_conf_t *alcf; #if (NGX_HAVE_INET6) u_char *p; in_addr_t addr; struct sockaddr_in6 *sin6; #endif alcf = ngx_http_get_module_loc_conf(r, ngx_http_access_module); switch (r->connection->sockaddr->sa_family) { case AF_INET: if (alcf->rules) { sin = (struct sockaddr_in *) r->connection->sockaddr; return ngx_http_access_inet(r, alcf, sin->sin_addr.s_addr); } break; #if (NGX_HAVE_INET6) case AF_INET6: sin6 = (struct sockaddr_in6 *) r->connection->sockaddr; p = sin6->sin6_addr.s6_addr; if (alcf->rules && IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { addr = p[12] << 24; addr += p[13] << 16; addr += p[14] << 8; addr += p[15]; return ngx_http_access_inet(r, alcf, htonl(addr)); } if (alcf->rules6) { return ngx_http_access_inet6(r, alcf, p); } #endif } return NGX_DECLINED; } static ngx_int_t ngx_http_access_inet(ngx_http_request_t *r, ngx_http_access_loc_conf_t *alcf, in_addr_t addr) { ngx_uint_t i; ngx_http_access_rule_t *rule; 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", addr, rule[i].mask, rule[i].addr); if ((addr & rule[i].mask) == rule[i].addr) { return ngx_http_access_found(r, rule[i].deny); } } return NGX_DECLINED; } #if (NGX_HAVE_INET6) static ngx_int_t ngx_http_access_inet6(ngx_http_request_t *r, ngx_http_access_loc_conf_t *alcf, u_char *p) { ngx_uint_t n; ngx_uint_t i; ngx_http_access_rule6_t *rule6; rule6 = alcf->rules6->elts; for (i = 0; i < alcf->rules6->nelts; i++) { #if (NGX_DEBUG) { size_t cl, ml, al; u_char ct[NGX_INET6_ADDRSTRLEN]; u_char mt[NGX_INET6_ADDRSTRLEN]; u_char at[NGX_INET6_ADDRSTRLEN]; cl = ngx_inet6_ntop(p, ct, NGX_INET6_ADDRSTRLEN); ml = ngx_inet6_ntop(rule6[i].mask.s6_addr, mt, NGX_INET6_ADDRSTRLEN); al = ngx_inet6_ntop(rule6[i].addr.s6_addr, at, NGX_INET6_ADDRSTRLEN); ngx_log_debug6(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "access: %*s %*s %*s", cl, ct, ml, mt, al, at); } #endif for (n = 0; n < 16; n++) { if ((p[n] & rule6[i].mask.s6_addr[n]) != rule6[i].addr.s6_addr[n]) { goto next; } } return ngx_http_access_found(r, rule6[i].deny); next: continue; } return NGX_DECLINED; } #endif static ngx_int_t ngx_http_access_found(ngx_http_request_t *r, ngx_uint_t deny) { ngx_http_core_loc_conf_t *clcf; if (deny) { clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); if (clcf->satisfy == NGX_HTTP_SATISFY_ALL) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "access forbidden by rule"); } return NGX_HTTP_FORBIDDEN; } 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_uint_t all; ngx_str_t *value; ngx_cidr_t cidr; ngx_http_access_rule_t *rule; #if (NGX_HAVE_INET6) ngx_http_access_rule6_t *rule6; #endif ngx_memzero(&cidr, sizeof(ngx_cidr_t)); value = cf->args->elts; all = (value[1].len == 3 && ngx_strcmp(value[1].data, "all") == 0); if (!all) { rc = ngx_ptocidr(&value[1], &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]); } } switch (cidr.family) { #if (NGX_HAVE_INET6) case AF_INET6: case 0: /* all */ if (alcf->rules6 == NULL) { alcf->rules6 = ngx_array_create(cf->pool, 4, sizeof(ngx_http_access_rule6_t)); if (alcf->rules6 == NULL) { return NGX_CONF_ERROR; } } rule6 = ngx_array_push(alcf->rules6); if (rule6 == NULL) { return NGX_CONF_ERROR; } rule6->mask = cidr.u.in6.mask; rule6->addr = cidr.u.in6.addr; rule6->deny = (value[0].data[0] == 'd') ? 1 : 0; if (!all) { break; } /* "all" passes through */ #endif default: /* AF_INET */ 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; } rule->mask = cidr.u.in.mask; rule->addr = cidr.u.in.addr; rule->deny = (value[0].data[0] == 'd') ? 1 : 0; } 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 NULL; } 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; } #if (NGX_HAVE_INET6) if (conf->rules6 == NULL) { conf->rules6 = prev->rules6; } #endif 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; }