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ngx_white_black_list.c
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ngx_white_black_list.c
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/*
* Copyright (C)
* Copyright (C)
* author: wu yangping
* create time: 20120600
* update time: 20120727
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#include <ngx_white_black_list.h>
ngx_array_t *array_white_black_list;
static char *ngx_white_black_list_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static ngx_int_t ngx_white_black_list_handler(ngx_http_request_t *r);
static ngx_int_t ngx_white_only_list_handler(ngx_http_request_t *r);
static ngx_int_t ngx_dyn_black_delete_handler(ngx_http_request_t *r);
static ngx_int_t ngx_white_black_list_init(ngx_conf_t *cf);
static void * ngx_white_black_list_create_conf(ngx_conf_t *cf);
static char * ngx_white_black_list_merge_conf(ngx_conf_t *cf, void *parent, void *child);
static ngx_int_t ngx_white_black_list_conf_parse (ngx_shm_zone_t *shm_zone);
static char *ngx_http_dyn_black_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
ngx_shm_zone_t *ngx_whte_black_get_shmzone_by_name(ngx_str_t *zone_name);
static ngx_command_t ngx_white_black_list_commands[] = {
{ ngx_string("white_black_list_conf"),
NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE2,
ngx_white_black_list_set,
0,
0,
NULL },
{ ngx_string("white_list"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
ngx_http_white_black_list_set,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL },
{ ngx_string("black_list"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
ngx_http_white_black_list_set,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL },
{ ngx_string("dyn_black"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
ngx_http_dyn_black_set,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL },
ngx_null_command
};
static ngx_http_module_t ngx_white_black_list_commands_ctx = {
NULL, /* preconfiguration */
ngx_white_black_list_init, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
ngx_white_black_list_create_conf, /* create location configuration */
ngx_white_black_list_merge_conf /* merge location configuration */
};
ngx_module_t ngx_white_black_list_module = {
NGX_MODULE_V1,
&ngx_white_black_list_commands_ctx, /* module context */
ngx_white_black_list_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_rbtree_node_t *
ngx_white_black_list_lookup(ngx_rbtree_t *rbtree, ngx_str_t *vv,
uint32_t hash)
{
ngx_int_t rc;
ngx_rbtree_node_t *node, *sentinel;
ngx_white_black_list_node_t *lcn;
ngx_cidr_t *cdir;
node = rbtree->root;
sentinel = rbtree->sentinel;
while (node != sentinel) {
if (hash < node->key) {
node = node->left;
continue;
}
if (hash > node->key) {
node = node->right;
continue;
}
/* hash == node->key */
lcn = (ngx_white_black_list_node_t *) &node->color;
cdir = (ngx_cidr_t *)&lcn->data;
rc=cdir->u.in.addr-ngx_inet_addr(vv->data,vv->len);
if (rc == 0) {
return node;
}
node = (rc < 0) ? node->left : node->right;
}
return NULL;
}
static void
ngx_white_black_list_rbtree_insert_value(ngx_rbtree_node_t *temp,
ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel)
{
ngx_rbtree_node_t **p;
ngx_white_black_list_node_t *lcn, *lcnt;
for ( ;; ) {
if (node->key < temp->key) {
p = &temp->left;
} else if (node->key > temp->key) {
p = &temp->right;
} else { /* node->key == temp->key */
lcn = (ngx_white_black_list_node_t *) &node->color;
lcnt = (ngx_white_black_list_node_t *) &temp->color;
p = (ngx_memn2cmp(lcn->data, lcnt->data, lcn->len, lcnt->len) < 0)
? &temp->left : &temp->right;
}
if (*p == sentinel) {
break;
}
temp = *p;
}
node->parent = temp;
node->left = sentinel;
node->right = sentinel;
*p = node;
ngx_rbt_red(node);
}
static ngx_int_t
ngx_white_list_init_zone(ngx_shm_zone_t *shm_zone, void *data)
{
ngx_white_black_list_ctx_t *octx = data;
size_t len;
ngx_slab_pool_t *shpool;
ngx_rbtree_node_t *sentinel;
ngx_white_black_list_ctx_t *ctx;
ctx = shm_zone->data;
if (octx) {
if (ngx_strcmp(ctx->var.data, octx->var.data) != 0) {
ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0,
"whilte_black_list zone \"%V\" uses the \"%V\" variable "
"while previously it used the \"%V\" variable",
&shm_zone->shm.name, &ctx->var, &octx->var);
return NGX_ERROR;
}
ctx->rbtree = octx->rbtree;
return NGX_OK;
}
shpool = (ngx_slab_pool_t *) shm_zone->shm.addr;
if (shm_zone->shm.exists) {
ctx->rbtree = shpool->data;
return NGX_OK;
}
ctx->rbtree = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_t));
if (ctx->rbtree == NULL) {
return NGX_ERROR;
}
ctx->network_list = ngx_slab_alloc(shpool, sizeof(ngx_network_addr_list_t));
if (ctx->network_list == NULL)
return NGX_ERROR;
ctx->network_list->data = NULL;
ctx->network_list->delete= 0;
ctx->network_list->next = NULL;
shpool->data = ctx->rbtree;
sentinel = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_node_t));
if (sentinel == NULL) {
return NGX_ERROR;
}
ngx_rbtree_init(ctx->rbtree, sentinel,
ngx_white_black_list_rbtree_insert_value);
len = sizeof(" in whilte_black_list zone \"\"") + shm_zone->shm.name.len;
shpool->log_ctx = ngx_slab_alloc(shpool, len);
if (shpool->log_ctx == NULL) {
return NGX_ERROR;
}
ngx_sprintf(shpool->log_ctx, " in whilte_black_list zone \"%V\"%Z",
&shm_zone->shm.name);
return ngx_white_black_list_conf_parse(shm_zone);
return NGX_OK;
}
static char *
ngx_white_black_list_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
u_char *p;
ssize_t size;
ngx_str_t *value, name, s;
ngx_uint_t i;
ngx_shm_zone_t *shm_zone;
ngx_white_black_list_ctx_t *ctx;
ngx_white_black_array_node_t *ngx_wb_array_node;
value = cf->args->elts;
ctx = NULL;
size = 0;
name.len = 0;
if (array_white_black_list == NULL){
array_white_black_list = ngx_array_create(cf->pool, 8, sizeof(ngx_white_black_array_node_t));
if (array_white_black_list == NULL){
return NGX_CONF_ERROR;
}
}
for (i = 2; i < cf->args->nelts; i++) {
if (ngx_strncmp(value[i].data, "zone=", 5) == 0) {
name.data = value[i].data + 5;
p = (u_char *) ngx_strchr(name.data, ':');
if (p == NULL) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid zone size \"%V\"", &value[i]);
return NGX_CONF_ERROR;
}
name.len = p - name.data;
s.data = p + 1;
s.len = value[i].data + value[i].len - s.data;
size = ngx_parse_size(&s);
if (size == NGX_ERROR) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid zone size \"%V\"", &value[i]);
return NGX_CONF_ERROR;
}
if (size < (ssize_t) (8 * ngx_pagesize)) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"zone \"%V\" is too small", &value[i]);
return NGX_CONF_ERROR;
}
continue;
}
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid parameter \"%V\"", &value[i]);
return NGX_CONF_ERROR;
}
ctx = ngx_pcalloc(cf->pool, sizeof(ngx_white_black_list_ctx_t));
if (ctx == NULL) {
return NGX_CONF_ERROR;
}
if (name.len == 0) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"\"%V\" must have \"zone\" parameter",
&cmd->name);
return NGX_CONF_ERROR;
}
ctx->var.data = value[1].data;
ctx->var.len = value[1].len;
if (ngx_conf_full_name(cf->cycle, &ctx->var, 0) != NGX_OK) {
return NGX_CONF_ERROR;
}
shm_zone = ngx_shared_memory_add(cf, &name, size,
&ngx_white_black_list_module);
if (shm_zone == NULL) {
return NGX_CONF_ERROR;
}
if (shm_zone->data) {
ctx = shm_zone->data;
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"%V \"%V\" is already bound to variable \"%V\"",
&cmd->name, &name, &ctx->var);
return NGX_CONF_ERROR;
}
shm_zone->init = ngx_white_list_init_zone;
shm_zone->data = ctx;
ngx_wb_array_node = ngx_array_push(array_white_black_list);
if(ngx_wb_array_node == NULL){
return NGX_CONF_ERROR;
}
ngx_wb_array_node->zone_name = ngx_pcalloc(cf->pool, sizeof(ngx_str_t));
if (ngx_wb_array_node->zone_name == NULL){
return NGX_CONF_ERROR;
}
ngx_wb_array_node->conf_path= ngx_pcalloc(cf->pool, sizeof(ngx_str_t));
if (ngx_wb_array_node->conf_path== NULL){
return NGX_CONF_ERROR;
}
ngx_wb_array_node->conf_type= ngx_pcalloc(cf->pool, sizeof(ngx_str_t));
if (ngx_wb_array_node->conf_type== NULL){
return NGX_CONF_ERROR;
}
ngx_wb_array_node->shm_zone = shm_zone;
ngx_wb_array_node->zone_name->data = name.data;
ngx_wb_array_node->zone_name->len = name.len;
ngx_wb_array_node->conf_path->data = value[1].data;
ngx_wb_array_node->conf_path->len = value[1].len;
ngx_wb_array_node->conf_type->data = value[0].data;
ngx_wb_array_node->conf_type->len = value[0].len;
if (ngx_conf_full_name(cf->cycle, ngx_wb_array_node->conf_path, 0) != NGX_OK) {
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
static
ngx_int_t ngx_white_black_list_conf_parse (ngx_shm_zone_t *shm_zone)
{
off_t file_size;
ssize_t n,len;
uint32_t hash;
ngx_fd_t fd;
ngx_str_t *value, ip_value;
ngx_buf_t buf;
ngx_conf_file_t file;
ngx_slab_pool_t *shpool;
ngx_rbtree_node_t *node;
ngx_white_black_list_ctx_t *ctx;
ngx_white_black_list_node_t *lc;
ngx_network_addr_list_t *pos_net_addr, *new_node;
ngx_network_addr_node_t *pos_net_data;
ngx_cidr_t cdir;
if (shm_zone == NULL)
return NGX_ERROR;
ctx = shm_zone->data;
value = &ctx->var;
shpool = (ngx_slab_pool_t *)shm_zone->shm.addr;
fd = ngx_open_file(value->data, NGX_FILE_RDONLY, NGX_FILE_CREATE_OR_OPEN, 0);
if (fd == NGX_INVALID_FILE) {
ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, ngx_errno,
ngx_open_file_n " \"%s\" failed",
value->data);
return NGX_ERROR;
}
if (ngx_fd_info(fd, &file.file.info) == -1) {
ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, ngx_errno,
ngx_fd_info_n " \"%s\" failed", value->data);
}
file.buffer = &buf;
file.file.fd = fd;
file.file.name.data = value->data;
file.file.name.len = value->len;
file.file.log = shm_zone->shm.log;
file.file.offset = 0;
file.line = 1;
file_size = ngx_file_size(&file.file.info);
buf.start = ngx_alloc(file_size, shm_zone->shm.log);
if (buf.start == NULL) {
goto failed;
}
buf.pos = buf.start;
buf.last = buf.start;
buf.end = buf.last + file_size;
buf.temporary = 1;
n = ngx_read_file(&file.file, buf.start, file_size,
file.file.offset);
if (n == NGX_ERROR)
{
ngx_free(buf.start);
goto failed;
}
/*you can parse file now!*/
ngx_shmtx_lock(&shpool->mutex);
for (buf.pos = buf.start ;buf.pos < buf.end; buf.pos++)
{
/*skip the line that start with '#'!*/
if (*buf.pos == '#')
{
for (;buf.pos < buf.end; buf.pos++)
{
if (*buf.pos == '\n' || (*buf.pos == CR && *(buf.pos+1)==LF))
break;
}
}
/*skip*/
if (*buf.pos == '\n' || *buf.pos == ' '
|| *buf.pos == '\t' || *buf.pos == CR || *buf.pos == LF)
{
continue;
}
buf.last = buf.pos;
ip_value.data = buf.pos;
for (;buf.pos < buf.end; buf.pos++)
{
if (*buf.pos == '\n' || (*buf.pos == CR && *(buf.pos+1)==LF))
{
buf.last = buf.pos;
break;
}
}
if (buf.last == ip_value.data)
{
/*last line?*/
if (buf.end - buf.pos < 19 /*sizeof("255.255.255.255/32")+1*/)
{
buf.last = buf.end;
}
else
{
continue;
}
}
ip_value.len = buf.last - ip_value.data;
if (ip_value.len > 18)
{
ngx_log_error(NGX_LOG_ALERT, shm_zone->shm.log, 0,
"zone name %s, the value of the %s, "
"is more than 18 bytes! ABORT!!!"
, shm_zone->shm.name.data, ip_value.data);
continue;
}
len = sizeof(ngx_cidr_t);
if (ngx_ptocidr(&ip_value, &cdir) == NGX_ERROR)
{
ngx_shmtx_unlock(&shpool->mutex);
ngx_log_error(NGX_LOG_ERR, shm_zone->shm.log, 0,
"ngx_ptocidr error in ngx_white_black_list_conf_parse, zone_name:%s, ipvalue:%s, start failed!"
, shm_zone->shm.name.data, ip_value.data);
ngx_free(buf.start);
goto failed;
}
shpool = (ngx_slab_pool_t *)shm_zone->shm.addr;
/*is network addr*/
if (cdir.u.in.mask != 0xffffffff)
{
pos_net_addr = ctx->network_list;
if (pos_net_addr->data == NULL)
{
pos_net_data = ngx_slab_alloc(shpool, sizeof(ngx_network_addr_node_t));
if (pos_net_data == NULL)
return NGX_ERROR;
pos_net_data->addr = cdir.u.in.addr;
pos_net_data->mask = cdir.u.in.mask;
pos_net_addr->data = pos_net_data;
continue;
}
for (;pos_net_addr->next!=NULL; pos_net_addr = pos_net_addr->next){
}
new_node = ngx_slab_alloc(shpool, sizeof(ngx_network_addr_list_t));
if (new_node == NULL)
return NGX_ERROR;
pos_net_data = ngx_slab_alloc(shpool, sizeof(ngx_network_addr_node_t));
if (pos_net_data == NULL)
return NGX_ERROR;
pos_net_data->addr = cdir.u.in.addr;
pos_net_data->mask = cdir.u.in.mask;
new_node->data = pos_net_data;
new_node->delete = 0;
new_node->next = NULL;
pos_net_addr->next = new_node;
continue;
}
hash = (uint32_t)cdir.u.in.addr;
n = offsetof(ngx_rbtree_node_t, color)
+ offsetof(ngx_white_black_list_node_t, data)
+ len;
node = ngx_slab_alloc(shpool, n);
if (node == NULL) {
ngx_shmtx_unlock(&shpool->mutex);
ngx_free(buf.start);
goto failed;
}
lc = (ngx_white_black_list_node_t *) &node->color;
node->key = hash;
lc->len = (u_char) len;
ngx_memcpy(lc->data, &cdir, len);
ngx_rbtree_insert(ctx->rbtree, node);
}
ngx_shmtx_unlock(&shpool->mutex);
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, shm_zone->shm.log, ngx_errno,
ngx_close_file_n " %s failed",
value->data);
return NGX_ERROR;
}
return NGX_OK;
failed:
if (ngx_close_file(fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, shm_zone->shm.log, ngx_errno,
ngx_close_file_n " %s failed",
value->data);
return NGX_ERROR;
}
return NGX_ERROR;
}
static
char * ngx_white_black_list_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
/*init shm*/
if (ngx_white_black_list_zone(cf, cmd, conf) == NGX_CONF_ERROR)
return NGX_CONF_ERROR;
return NGX_CONF_OK;
}
ngx_int_t ngx_white_list_is_in_list(ngx_http_request_t *r)
{
/*if return NGX_OK then the remote_ip in white_list!*/
if (ngx_white_only_list_handler(r) == NGX_OK)
return NGX_OK;
return NGX_ERROR;
}
static ngx_int_t
ngx_ip_in_black_list(ngx_http_request_t *r)
{
uint32_t hash;
ngx_str_t *ip_str;
ngx_uint_t i;
ngx_slab_pool_t *shpool;
ngx_rbtree_node_t *node;
ngx_network_addr_list_t *pos_net_addr;
ngx_network_addr_node_t *pos_data;
ngx_white_black_list_ctx_t *ctx;
ngx_white_black_list_node_t *bln;
ngx_white_black_list_conf_t *lccf;
ngx_white_black_list_isvalid_t *valids;
ip_str = &r->connection->addr_text;
hash = (uint32_t)ngx_inet_addr(ip_str->data, ip_str->len);
lccf = ngx_http_get_module_loc_conf(r, ngx_white_black_list_module);
valids = lccf->valids.elts;
/*black list*/
for (i = 0; i < lccf->valids.nelts; i++) {
if (valids[i].shm_zone == NULL)
continue;
if (valids[i].isvalid == 0)
continue;
if (valids[i].iswhite)
continue;
if (valids[i].delete == 1)
continue;
shpool = (ngx_slab_pool_t *)valids[i].shm_zone->shm.addr;
ctx = (ngx_white_black_list_ctx_t *)valids[i].shm_zone->data;
if (shpool == NULL || ctx == NULL)
continue;
ngx_shmtx_lock(&shpool->mutex);
node = ngx_white_black_list_lookup(ctx->rbtree, ip_str, hash);
ngx_shmtx_unlock(&shpool->mutex);
if (node)
{
return NGX_OK;
}
}
return NGX_ERROR;
}
static ngx_int_t
ngx_dyn_black_delete_handler(ngx_http_request_t *r)
{
uint32_t hash;
ngx_str_t *ip_str;
ngx_uint_t i;
ngx_slab_pool_t *shpool;
ngx_rbtree_node_t *node;
ngx_network_addr_list_t *pos_net_addr;
ngx_network_addr_node_t *pos_data;
ngx_white_black_list_ctx_t *ctx;
ngx_white_black_list_node_t *bln;
ngx_white_black_list_conf_t *lccf;
ngx_white_black_list_isvalid_t *valids;
if (r==NULL || r->connection==NULL)
return NGX_DECLINED;
ip_str = &r->connection->addr_text;
hash = (uint32_t)ngx_inet_addr(ip_str->data, ip_str->len);
lccf = ngx_http_get_module_loc_conf(r, ngx_white_black_list_module);
valids = lccf->valids.elts;
/*black list*/
for (i = 0; i < lccf->valids.nelts; i++) {
/*
* dyn_black enable?
* */
if (!valids[i].is_dyn_black)
continue;
if (valids[i].shm_zone == NULL)
continue;
if (valids[i].isvalid == 0)
continue;
if (valids[i].iswhite)
continue;
if (valids[i].delete == 1)
continue;
/*==0 ˵Ã÷ΪÓÀ¾Ã*/
if (valids[i].forbidden_time == 0)
continue;
shpool = (ngx_slab_pool_t *)valids[i].shm_zone->shm.addr;
ctx = (ngx_white_black_list_ctx_t *)valids[i].shm_zone->data;
if (shpool == NULL || ctx == NULL)
continue;
ngx_shmtx_lock(&shpool->mutex);
node = ngx_white_black_list_lookup(ctx->rbtree, ip_str, hash);
ngx_shmtx_unlock(&shpool->mutex);
if (node)
{
bln = (ngx_white_black_list_node_t *) &node->color;
if (bln->is_dyn_black)
{
/*delete*/
if (bln->add_time + valids[i].forbidden_time < ngx_cached_time->sec)
{
ngx_shmtx_lock(&shpool->mutex);
ngx_rbtree_delete(ctx->rbtree, node);
ngx_slab_free_locked(shpool, node);
ngx_shmtx_unlock(&shpool->mutex);
return NGX_DECLINED;;
}
}
}
}
return NGX_DECLINED;
}
static ngx_int_t
ngx_white_black_list_handler(ngx_http_request_t *r)
{
uint32_t hash;
ngx_str_t *ip_str;
ngx_uint_t i;
ngx_slab_pool_t *shpool;
ngx_rbtree_node_t *node;
ngx_network_addr_list_t *pos_net_addr;
ngx_network_addr_node_t *pos_data;
ngx_white_black_list_ctx_t *ctx;
ngx_white_black_list_conf_t *lccf;
ngx_white_black_list_isvalid_t *valids;
if (r==NULL || r->connection==NULL)
return NGX_DECLINED;
ip_str = &r->connection->addr_text;
hash = (uint32_t)ngx_inet_addr(ip_str->data, ip_str->len);
lccf = ngx_http_get_module_loc_conf(r, ngx_white_black_list_module);
valids = lccf->valids.elts;
/*black list*/
for (i = 0; i < lccf->valids.nelts; i++) {
if (valids[i].shm_zone == NULL)
continue;
if (valids[i].isvalid == 0)
continue;
if (valids[i].iswhite)
continue;
if (valids[i].delete == 1)
continue;
shpool = (ngx_slab_pool_t *)valids[i].shm_zone->shm.addr;
ctx = (ngx_white_black_list_ctx_t *)valids[i].shm_zone->data;
ngx_shmtx_lock(&shpool->mutex);
node = ngx_white_black_list_lookup(ctx->rbtree, ip_str, hash);
ngx_shmtx_unlock(&shpool->mutex);
if (node)
return NGX_HTTP_FORBIDDEN;
/*in network list?*/
pos_net_addr = ctx->network_list;
for (;pos_net_addr!=NULL;
pos_net_addr = pos_net_addr->next)
{
if (pos_net_addr->data!=NULL
&& pos_net_addr->delete != 1)
{
pos_data = pos_net_addr->data;
if ((pos_data->mask & hash)
== pos_data->addr)
return NGX_HTTP_FORBIDDEN;
}
}
}
/*white list*/
for (i = 0; i < lccf->valids.nelts; i++) {
if (valids[i].shm_zone == NULL)
continue;
if (valids[i].isvalid == 0)
continue;
if (!valids[i].iswhite)
continue;
if (valids[i].delete == 1)
continue;
ctx = (ngx_white_black_list_ctx_t *)valids[i].shm_zone->data;
shpool = (ngx_slab_pool_t *)valids[i].shm_zone->shm.addr;
ngx_shmtx_lock(&shpool->mutex);
node = ngx_white_black_list_lookup(ctx->rbtree, ip_str, hash);
ngx_shmtx_unlock(&shpool->mutex);
if (node)
return NGX_OK;
/*in network list?*/
pos_net_addr = ctx->network_list;
for (;pos_net_addr!=NULL;
pos_net_addr = pos_net_addr->next)
{
if (pos_net_addr->data!=NULL
&& pos_net_addr->delete != 1)
{
pos_data = pos_net_addr->data;
if ((pos_data->mask & hash)
== pos_data->addr)
return NGX_OK;
}
}
}
return NGX_DECLINED;
}
static ngx_int_t
ngx_white_only_list_handler(ngx_http_request_t *r)
{
uint32_t hash;
ngx_str_t *ip_str;
ngx_uint_t i;
ngx_slab_pool_t *shpool;
ngx_rbtree_node_t *node;
ngx_network_addr_node_t *pos_data;
ngx_network_addr_list_t *pos_net_addr;
ngx_white_black_list_ctx_t *ctx;
ngx_white_black_list_conf_t *lccf;
ngx_white_black_list_isvalid_t *valids;
if (r==NULL || r->connection==NULL)
return NGX_DECLINED;
ip_str = &r->connection->addr_text;
hash = (uint32_t)ngx_inet_addr(ip_str->data, ip_str->len);
lccf = ngx_http_get_module_loc_conf(r, ngx_white_black_list_module);
valids = lccf->valids.elts;
/*white list*/
for (i = 0; i < lccf->valids.nelts; i++) {
if (valids[i].shm_zone == NULL)
continue;
if (valids[i].isvalid == 0)
continue;
if (!valids[i].iswhite)
continue;
if (valids[i].delete ==1 )
continue;
ctx = (ngx_white_black_list_ctx_t *)valids[i].shm_zone->data;
shpool = (ngx_slab_pool_t *)valids[i].shm_zone->shm.addr;
ngx_shmtx_lock(&shpool->mutex);
node = ngx_white_black_list_lookup(ctx->rbtree, ip_str, hash);
ngx_shmtx_unlock(&shpool->mutex);
if (node)
return NGX_OK;
/*in network list?*/
pos_net_addr = ctx->network_list;
for (;pos_net_addr!=NULL;
pos_net_addr = pos_net_addr->next)
{
if (pos_net_addr->data!=NULL
&& pos_net_addr->delete != 1)
{
pos_data = pos_net_addr->data;
if ((pos_data->mask & hash)
== pos_data->addr)
return NGX_OK;
}
}
}
return NGX_DECLINED;
}
static ngx_int_t
ngx_white_black_list_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_PREACCESS_PHASE].handlers);
if (h == NULL) {
return NGX_ERROR;
}
*h = ngx_white_black_list_handler;
h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers);
if (h == NULL) {
return NGX_ERROR;
}
*h = ngx_dyn_black_delete_handler;
return NGX_OK;
}
static void *
ngx_white_black_list_create_conf(ngx_conf_t *cf)
{
ngx_white_black_list_conf_t *conf;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_white_black_list_conf_t));
if (conf == NULL) {
return NULL;
}
/*
* set by ngx_pcalloc():
*
* conf->isvalid.elts = NULL;
*/
conf->log_level = NGX_CONF_UNSET_UINT;
return conf;
}
static char *
ngx_white_black_list_merge_conf(ngx_conf_t *cf, void *parent, void *child)
{
ngx_white_black_list_conf_t *prev = parent;
ngx_white_black_list_conf_t *conf = child;
if (conf->valids.elts == NULL) {
conf->valids= prev->valids;
}
ngx_conf_merge_uint_value(conf->log_level, prev->log_level, NGX_LOG_ERR);
return NGX_CONF_OK;
}
static char *ngx_http_dyn_black_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_str_t *value;
ngx_uint_t i;
ngx_shm_zone_t *shm_zone;
ngx_white_black_list_conf_t *lccf = conf;
ngx_white_black_list_isvalid_t *valid, *valids;
value = cf->args->elts;
if (cf->args->nelts < 3)
return NGX_CONF_ERROR;
shm_zone = ngx_whte_black_get_shmzone_by_name(&value[1]);
//shm_zone = ngx_shared_memory_add(cf, &value[1], 0,
// &ngx_white_black_list_module);
if (shm_zone == NULL) {
return NGX_CONF_ERROR;