mirror of
https://github.com/nginx/nginx.git
synced 2024-12-17 23:27:49 +08:00
377 lines
9.6 KiB
C
377 lines
9.6 KiB
C
|
|
/*
|
|
* 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;
|
|
|
|
alcf = ngx_http_get_module_loc_conf(r, ngx_http_access_module);
|
|
|
|
#if (NGX_HAVE_INET6)
|
|
|
|
if (alcf->rules6 && r->connection->sockaddr->sa_family == AF_INET6) {
|
|
u_char *p;
|
|
in_addr_t addr;
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
sin6 = (struct sockaddr_in6 *) r->connection->sockaddr;
|
|
p = sin6->sin6_addr.s6_addr;
|
|
|
|
if (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));
|
|
}
|
|
|
|
return ngx_http_access_inet6(r, alcf, p);
|
|
}
|
|
|
|
#endif
|
|
|
|
if (alcf->rules && r->connection->sockaddr->sa_family == AF_INET) {
|
|
sin = (struct sockaddr_in *) r->connection->sockaddr;
|
|
return ngx_http_access_inet(r, alcf, sin->sin_addr.s_addr);
|
|
}
|
|
|
|
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_debug3(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;
|
|
}
|