diff options
Diffstat (limited to 'app/nginx/src/http/modules/ngx_http_access_module.c')
| -rw-r--r-- | app/nginx/src/http/modules/ngx_http_access_module.c | 469 |
1 files changed, 469 insertions, 0 deletions
diff --git a/app/nginx/src/http/modules/ngx_http_access_module.c b/app/nginx/src/http/modules/ngx_http_access_module.c new file mode 100644 index 0000000..c553e46 --- /dev/null +++ b/app/nginx/src/http/modules/ngx_http_access_module.c @@ -0,0 +1,469 @@ + +/* + * Copyright (C) Igor Sysoev + * Copyright (C) Nginx, Inc. + */ + + +#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 + +#if (NGX_HAVE_UNIX_DOMAIN) + +typedef struct { + ngx_uint_t deny; /* unsigned deny:1; */ +} ngx_http_access_rule_un_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 +#if (NGX_HAVE_UNIX_DOMAIN) + ngx_array_t *rules_un; /* array of ngx_http_access_rule_un_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 +#if (NGX_HAVE_UNIX_DOMAIN) +static ngx_int_t ngx_http_access_unix(ngx_http_request_t *r, + ngx_http_access_loc_conf_t *alcf); +#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); + } + + break; + +#endif + +#if (NGX_HAVE_UNIX_DOMAIN) + + case AF_UNIX: + if (alcf->rules_un) { + return ngx_http_access_unix(r, alcf); + } + + break; + +#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 + + +#if (NGX_HAVE_UNIX_DOMAIN) + +static ngx_int_t +ngx_http_access_unix(ngx_http_request_t *r, ngx_http_access_loc_conf_t *alcf) +{ + ngx_uint_t i; + ngx_http_access_rule_un_t *rule_un; + + rule_un = alcf->rules_un->elts; + for (i = 0; i < alcf->rules_un->nelts; i++) { + + /* TODO: check path */ + if (1) { + return ngx_http_access_found(r, rule_un[i].deny); + } + } + + 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 +#if (NGX_HAVE_UNIX_DOMAIN) + ngx_http_access_rule_un_t *rule_un; +#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) { + +#if (NGX_HAVE_UNIX_DOMAIN) + + if (value[1].len == 5 && ngx_strcmp(value[1].data, "unix:") == 0) { + cidr.family = AF_UNIX; + rc = NGX_OK; + + } else { + rc = ngx_ptocidr(&value[1], &cidr); + } + +#else + rc = ngx_ptocidr(&value[1], &cidr); +#endif + + 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]); + } + } + + if (cidr.family == AF_INET || all) { + + 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; + } + +#if (NGX_HAVE_INET6) + if (cidr.family == AF_INET6 || 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; + } +#endif + +#if (NGX_HAVE_UNIX_DOMAIN) + if (cidr.family == AF_UNIX || all) { + + if (alcf->rules_un == NULL) { + alcf->rules_un = ngx_array_create(cf->pool, 1, + sizeof(ngx_http_access_rule_un_t)); + if (alcf->rules_un == NULL) { + return NGX_CONF_ERROR; + } + } + + rule_un = ngx_array_push(alcf->rules_un); + if (rule_un == NULL) { + return NGX_CONF_ERROR; + } + + rule_un->deny = (value[0].data[0] == 'd') ? 1 : 0; + } +#endif + + 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 +#if (NGX_HAVE_INET6) + && conf->rules6 == NULL +#endif +#if (NGX_HAVE_UNIX_DOMAIN) + && conf->rules_un == NULL +#endif + ) { + conf->rules = prev->rules; +#if (NGX_HAVE_INET6) + conf->rules6 = prev->rules6; +#endif +#if (NGX_HAVE_UNIX_DOMAIN) + conf->rules_un = prev->rules_un; +#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; +} |