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ngx_http_limit_access_interface.c
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ngx_http_limit_access_interface.c
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#include "ngx_http_limit_access_module.h"
static ngx_http_limit_access_bucket_t *ngx_alloc_limit_access_bucket(
ngx_http_limit_access_ctx_t *ctx, size_t len);
static void ngx_free_limit_access_bucket(ngx_http_limit_access_ctx_t *ctx,
ngx_http_limit_access_bucket_t *bucket);
static ngx_int_t ngx_http_limit_access_process_post(ngx_http_request_t *r,
u_char *data, size_t len, ngx_flag_t flag);
static ngx_int_t ngx_http_limit_access_process_param(ngx_http_request_t *r,
ngx_str_t *param, ngx_flag_t flag);
static ngx_int_t limit_access_type(ngx_http_request_t *r,
ngx_str_t *value, ngx_flag_t flag);
static ngx_int_t limit_access_ban_expire(ngx_http_request_t *r,
ngx_str_t *value, ngx_flag_t flag);
static ngx_int_t limit_access_ban_list(ngx_http_request_t *r,
ngx_str_t *value, ngx_flag_t flag);
static ngx_int_t limit_access_free_list(ngx_http_request_t *r,
ngx_str_t *value, ngx_flag_t flag);
static ngx_int_t limit_access_show_list(ngx_http_request_t *r,
ngx_str_t *value, ngx_flag_t flag);
static ngx_int_t limit_access_destroy_list(ngx_http_request_t *r,
ngx_str_t *value, ngx_flag_t flag);
static ngx_int_t limit_access_expire_list(ngx_http_request_t *r,
ngx_str_t *value, ngx_flag_t flag);
static ngx_int_t ngx_http_limit_access_ban_ip(ngx_http_request_t *r,
ngx_http_limit_access_ctx_t *ctx, in_addr_t ip);
static ngx_int_t ngx_http_limit_access_free_ip(ngx_http_request_t *r,
ngx_http_limit_access_ctx_t *ctx, in_addr_t ip);
static ngx_int_t ngx_http_limit_access_show_ip(ngx_http_request_t *r,
ngx_http_limit_access_ctx_t *ctx, ngx_buf_t *b, in_addr_t ip);
static void ngx_http_limit_access_unescape_value(ngx_str_t *value);
static ngx_int_t ngx_http_limit_access_ban_variable(ngx_http_request_t *r,
ngx_http_limit_access_ctx_t *ctx, ngx_str_t *variable);
static ngx_int_t ngx_http_limit_access_free_variable(ngx_http_request_t *r,
ngx_http_limit_access_ctx_t *ctx, ngx_str_t *variable);
static ngx_int_t ngx_http_limit_access_show_variable(ngx_http_request_t *r,
ngx_http_limit_access_ctx_t *ctx, ngx_buf_t *b, ngx_str_t *variable);
static ngx_int_t ngx_http_limit_access_destroy_list(ngx_http_request_t *r,
ngx_http_limit_access_ctx_t *ctx);
static ngx_int_t ngx_http_limit_access_expire_list(ngx_http_request_t *r,
ngx_http_limit_access_ctx_t *ctx);
static ngx_http_limit_access_directive_t directives[] = {
{ ngx_string("ban_type"), limit_access_type },
{ ngx_string("ban_expire"), limit_access_ban_expire },
{ ngx_string("ban_list"), limit_access_ban_list },
{ ngx_string("free_type"), limit_access_type },
{ ngx_string("free_list"), limit_access_free_list },
{ ngx_string("show_type"), limit_access_type },
{ ngx_string("show_list"), limit_access_show_list },
{ ngx_string("destroy_list"), limit_access_destroy_list },
{ ngx_string("expire_list"), limit_access_expire_list },
{ ngx_null_string, NULL }
};
static ngx_http_limit_access_type_name_t limit_types[] = {
{ ngx_string("ip"), HASH_IP },
{ ngx_string("variable"), HASH_VARIABLE },
{ ngx_null_string, 0 }
};
void
ngx_http_limit_access_process_handler(ngx_http_request_t *r)
{
u_char *p, *data;
ssize_t size;
size_t len;
ngx_buf_t *buf, *next;
ngx_int_t rc;
ngx_chain_t *cl;
ngx_chain_t out;
ngx_http_limit_access_conf_t *lacf;
ngx_http_limit_access_request_ctx_t *request_ctx;
request_ctx = ngx_http_get_module_ctx(r, ngx_http_limit_access_module);
lacf = ngx_http_get_module_loc_conf(r, ngx_http_limit_access_module);
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"limit_access_process_handler");
if (r->request_body == NULL || r->request_body->bufs == NULL) {
request_ctx->status = NGX_HTTP_NO_CONTENT;
goto finish;
}
data = NULL;
len = 0;
if(r->request_body->temp_file) {
cl = r->request_body->bufs;
while (cl) {
buf = cl->buf;
if (buf->in_file) {
len += buf->file_last - buf->file_pos;
} else {
len += buf->last - buf->pos;
}
cl = cl->next;
}
data = p = ngx_pnalloc(r->pool, len);
if (p == NULL) {
request_ctx->status = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto finish;
}
cl = r->request_body->bufs;
while (cl) {
buf = cl->buf;
if (buf->in_file) {
size = ngx_read_file(buf->file, p,
buf->file_last - buf->file_pos, buf->file_pos);
if (size == NGX_ERROR) {
request_ctx->status = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto finish;
}
p += size;
} else {
p = ngx_cpymem(p, buf->pos, buf->last - buf->pos);
}
cl = cl->next;
}
} else {
cl = r->request_body->bufs;
buf = cl->buf;
if (cl->next == NULL) {
len = buf->last - buf->pos;
data = p = buf->pos;
} else {
next = cl->next->buf;
len = (buf->last - buf->pos) + (next->last - next->pos);
data = p = ngx_pnalloc(r->pool, len);
if (p == NULL) {
request_ctx->status = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto finish;
}
p = ngx_cpymem(p, buf->pos, buf->last - buf->pos);
ngx_memcpy(p, next->pos, next->last - next->pos);
}
}
rc = ngx_http_limit_access_process_post(r, data, len,
PROCESS_COMMAND_ATTRIBUTE);
if (rc != NGX_OK) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"limit_access: invalid post body: \"%*s\"",
len, data);
request_ctx->status = NGX_HTTP_BAD_REQUEST;
goto finish;
}
size = 8 * ngx_pagesize;
if (request_ctx->show_all_list) {
size = lacf->output_buffer_size;
}
request_ctx->buf = ngx_create_temp_buf(r->pool, size);
if (request_ctx->buf == NULL) {
request_ctx->status = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto finish;
}
rc = ngx_http_limit_access_process_post(r, data, len,
PROCESS_COMMAND_CONTENT);
if (rc != NGX_OK) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"limit_access: invalid post body: \"%*s\"",
len, data);
request_ctx->status = NGX_HTTP_BAD_REQUEST;
}
finish:
r->headers_out.status = request_ctx->status;
if (r->headers_out.status == NGX_HTTP_OK) {
buf = request_ctx->buf;
if (buf->last != buf->pos) {
r->headers_out.content_length_n = buf->last - buf->pos;
out.buf = buf;
out.next = NULL;
buf->last_buf = 1;
rc = ngx_http_send_header(r);
if (rc == NGX_OK) {
rc = ngx_http_output_filter(r, &out);
}
} else {
r->header_only = 1;
rc = ngx_http_send_header(r);
}
} else {
r->header_only = 1;
rc = ngx_http_send_header(r);
}
ngx_http_finalize_request(r, rc);
}
static ngx_int_t
ngx_http_limit_access_process_post(ngx_http_request_t *r,
u_char *data, size_t len, ngx_flag_t flag)
{
u_char *p, *last;
ngx_int_t rc;
ngx_str_t param;
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"limit_access_post body:\"%*s\"", len, data);
p = data;
last = data + len;
do {
param.data = p;
param.len = 0;
while (p < last) {
if (*p == '&') {
p++;
break;
}
if (*p == CR || *p == LF) {
p = last;
break;
}
param.len++;
p++;
}
if (param.len != 0) {
rc = ngx_http_limit_access_process_param(r, ¶m, flag);
if(rc != NGX_OK) {
return rc;
}
}
} while (p < last);
return NGX_OK;
}
static ngx_int_t
ngx_http_limit_access_process_param(ngx_http_request_t *r, ngx_str_t *param,
ngx_flag_t flag)
{
u_char *p;
ngx_str_t name;
ngx_str_t value;
ngx_uint_t i;
ngx_http_limit_access_directive_t *cmd;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"limit_access: preparam=\"%V\"", param);
p = (u_char *) ngx_strlchr(param->data, param->data + param->len, '=');
if (p) {
name.data = param->data;
name.len = p - param->data;
value.data = p + 1;
value.len = param->len - name.len - 1;
} else {
name.data = param->data;
name.len = param->len;
value.data = NULL;
value.len = 0;
}
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"limit_access: param: \"%V\"=\"%V\"", &name, &value);
cmd = directives;
for(i = 0; ;i++) {
if ((cmd[i].name.len == name.len)
&& (ngx_strncasecmp(cmd[i].name.data, name.data, name.len) == 0)) {
if (cmd[i].handler) {
return cmd[i].handler(r, &value, flag);
} else {
return NGX_OK;
}
}
if (cmd[i].name.len == 0) {
break;
}
}
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"limit_access: invalid param: \"%V\"=\"%V\"",
&name, &value);
return NGX_ERROR;
}
static ngx_int_t
limit_access_type(ngx_http_request_t *r, ngx_str_t *value, ngx_flag_t flag)
{
ngx_uint_t i;
ngx_http_limit_access_ctx_t *ctx;
ngx_http_limit_access_conf_t *lacf;
ngx_http_limit_access_type_name_t *type;
if (flag != PROCESS_COMMAND_ATTRIBUTE) {
return NGX_OK;
}
lacf = ngx_http_get_module_loc_conf(r, ngx_http_limit_access_module);
if (lacf->shm_zone == NULL) {
return NGX_ERROR;
}
ctx = lacf->shm_zone->data;
type = limit_types;
for(i = 0; ;i++) {
if ((type[i].name.len == value->len)
&& (ngx_strncmp(type[i].name.data, value->data, value->len) == 0)) {
if (type[i].flag != ctx->type) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"limit_access: type not match: %ui != %ui",
type[i].flag, ctx->type);
return NGX_ERROR;
}
return NGX_OK;
}
if (type[i].name.len == 0) {
break;
}
}
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"limit_access: invalid type \"%V\"", value);
return NGX_ERROR;
}
static ngx_uint_t
ngx_atoui(u_char *line, size_t n)
{
ngx_uint_t value;
if (n == 0) {
return NGX_ERROR;
}
for (value = 0; n--; line++) {
if (*line < '0' || *line > '9') {
return NGX_ERROR;
}
value = value * 10 + (*line - '0');
}
return value;
}
static ngx_int_t
limit_access_ban_expire(ngx_http_request_t *r, ngx_str_t *value,
ngx_flag_t flag)
{
time_t expire;
ngx_http_limit_access_request_ctx_t *request_ctx;
if (flag != PROCESS_COMMAND_ATTRIBUTE) {
return NGX_OK;
}
request_ctx = ngx_http_get_module_ctx(r, ngx_http_limit_access_module);
expire = ngx_parse_time(value, 1);
if (expire == (time_t) NGX_ERROR) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"limit_access: invalid ban expire: \"%V\"", value);
return NGX_ERROR;
}
request_ctx->expire = expire;
return NGX_OK;
}
static ngx_int_t
limit_access_ban_list(ngx_http_request_t *r, ngx_str_t *value, ngx_flag_t flag)
{
u_char *start, *pos, *last;
ngx_str_t variable;
ngx_int_t rc, is_binary;
in_addr_t ip;
ngx_buf_t *b;
ngx_http_limit_access_ctx_t *ctx;
ngx_http_limit_access_hash_t *hash;
ngx_http_limit_access_conf_t *lacf;
ngx_http_limit_access_request_ctx_t *request_ctx;
if (flag != PROCESS_COMMAND_CONTENT) {
return NGX_OK;
}
request_ctx = ngx_http_get_module_ctx(r, ngx_http_limit_access_module);
lacf = ngx_http_get_module_loc_conf(r, ngx_http_limit_access_module);
if (lacf->shm_zone == NULL) {
return NGX_ERROR;
}
ctx = lacf->shm_zone->data;
ngx_shmtx_lock(&ctx->shpool->mutex);
hash = ctx->sh;
if (!hash->valid) {
goto fail;
}
is_binary = 0;
last = value->data + value->len;
for (start = pos = value->data; pos < last; pos++) {
if (*pos == ',' || pos == last - 1) {
if (pos == last - 1) {
pos = last;
}
if (ctx->type == HASH_IP) {
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"limit_access: string_ban_ip=\"%*s\"",
pos - start, start);
if (!is_binary) {
ip = ngx_inet_addr(start, pos - start);
if (ip == INADDR_NONE) {
is_binary = 1;
}
}
if (is_binary) {
ip = (in_addr_t) ngx_atoui(start, pos - start);
if (ip == (in_addr_t) NGX_ERROR) {
goto fail;
}
ip = (in_addr_t) htonl(ip);
}
rc = ngx_http_limit_access_ban_ip(r, ctx, ip);
if (rc == NGX_ERROR) {
goto fail;
}
} else if (ctx->type == HASH_VARIABLE) {
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"limit_access: string_ban_variable=\"%*s\"",
pos - start, start);
variable.len = pos - start;
variable.data = start;
rc = ngx_http_limit_access_ban_variable(r, ctx, &variable);
if (rc == NGX_ERROR) {
goto fail;
}
}
pos++;
start = pos;
}
}
ngx_shmtx_unlock(&ctx->shpool->mutex);
b = request_ctx->buf;
b->last = ngx_snprintf(b->last, b->end - b->last, "ban list succeed\n");
return NGX_OK;
fail:
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"limit_access: invalid ban list: \"%V\"", value);
ngx_shmtx_unlock(&ctx->shpool->mutex);
return NGX_ERROR;
}
static ngx_http_limit_access_bucket_t *
ngx_alloc_limit_access_bucket(ngx_http_limit_access_ctx_t *ctx, size_t len)
{
ngx_http_limit_access_hash_t *hash;
ngx_http_limit_access_bucket_t *bucket;
if (ctx->type == HASH_IP) {
hash = ctx->sh;
bucket = hash->free;
if (bucket) {
hash->free = bucket->next;
bucket->next = NULL;
return bucket;
}
}
bucket = ngx_slab_alloc_locked(ctx->shpool, len);
return bucket;
}
static void
ngx_free_limit_access_bucket(ngx_http_limit_access_ctx_t *ctx,
ngx_http_limit_access_bucket_t *bucket)
{
ngx_http_limit_access_hash_t *hash;
if (ctx->type == HASH_IP) {
hash = ctx->sh;
bucket->next = hash->free;
hash->free = bucket;
} else {
ngx_slab_free_locked(ctx->shpool, bucket);
}
}
static ngx_int_t
ngx_http_limit_access_ban_ip(ngx_http_request_t *r,
ngx_http_limit_access_ctx_t *ctx, in_addr_t ip)
{
time_t expire;
ngx_uint_t key;
ngx_http_limit_access_hash_t *hash;
ngx_http_limit_access_bucket_t *bucket, **p, *new, *head;
ngx_http_limit_access_request_ctx_t *request_ctx;
request_ctx = ngx_http_get_module_ctx(r, ngx_http_limit_access_module);
hash = ctx->sh;
key = (ngx_uint_t) ip;
p = &hash->buckets[key % ctx->bucket_number];
head = bucket = *p;
expire = ngx_time() + request_ctx->expire;
ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"limit_access: add ban_ip=%ud, expire=%T, key=%ui",
ntohl(ip), expire, key);
while (bucket) {
if (bucket->key == key) {
bucket->expire = expire;
return NGX_OK;
}
bucket = bucket->next;
}
bucket = head;
while (bucket) {
if (bucket->key == 0) {
bucket->key = key;
bucket->expire = expire;
return NGX_OK;
}
p = &bucket->next;
bucket = bucket->next;
}
new = ngx_alloc_limit_access_bucket(ctx,
sizeof(ngx_http_limit_access_bucket_t));
if (new == NULL) {
ngx_http_limit_access_expire_list(r, ctx);
new = ngx_alloc_limit_access_bucket(ctx,
sizeof(ngx_http_limit_access_bucket_t));
if (new == NULL) {
ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0,
"limit_access: not enough shared memory");
return NGX_ERROR;
}
}
*p = new;
new->key = key;
new->expire = expire;
new->len = 0;
new->next = NULL;
return NGX_OK;
}
static ngx_int_t
limit_access_free_list(ngx_http_request_t *r, ngx_str_t *value, ngx_flag_t flag)
{
u_char *start, *pos, *last;
ngx_buf_t *b;
ngx_str_t variable;
ngx_int_t rc, is_binary;
in_addr_t ip;
ngx_uint_t count;
ngx_http_limit_access_ctx_t *ctx;
ngx_http_limit_access_hash_t *hash;
ngx_http_limit_access_conf_t *lacf;
ngx_http_limit_access_request_ctx_t *request_ctx;
if (flag != PROCESS_COMMAND_CONTENT) {
return NGX_OK;
}
request_ctx = ngx_http_get_module_ctx(r, ngx_http_limit_access_module);
lacf = ngx_http_get_module_loc_conf(r, ngx_http_limit_access_module);
if (lacf->shm_zone == NULL) {
return NGX_ERROR;
}
ctx = lacf->shm_zone->data;
ngx_shmtx_lock(&ctx->shpool->mutex);
hash = ctx->sh;
if (!hash->valid) {
goto fail;
}
is_binary = 0;
count = 0;
last = value->data + value->len;
for (start = pos = value->data; pos < last; pos++) {
if (*pos == ',' || pos == last - 1) {
if (pos == last - 1) {
pos = last;
}
if (ctx->type == HASH_IP) {
if (!is_binary) {
ip = ngx_inet_addr(start, pos - start);
if (ip == INADDR_NONE) {
is_binary = 1;
}
}
if (is_binary) {
ip = (in_addr_t) ngx_atoui(start, pos - start);
if (ip == (in_addr_t) NGX_ERROR) {
goto fail;
}
ip = (in_addr_t) htonl(ip);
}
rc = ngx_http_limit_access_free_ip(r, ctx, ip);
if (rc == NGX_ERROR) {
goto fail;
} else if (rc == NGX_OK) {
count++;
}
} else if (ctx->type == HASH_VARIABLE) {
variable.len = pos - start;
variable.data = start;
rc = ngx_http_limit_access_free_variable(r, ctx, &variable);
if (rc == NGX_ERROR) {
goto fail;
} else if (rc == NGX_OK) {
count++;
}
}
pos++;
start = pos;
}
}
ngx_shmtx_unlock(&ctx->shpool->mutex);
b = request_ctx->buf;
b->last = ngx_snprintf(b->last, b->end - b->last,
"free list succeed with %ui records\n",
count);
return NGX_OK;
fail:
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"limit_access: invalid free list: \"%V\"", value);
ngx_shmtx_unlock(&ctx->shpool->mutex);
return NGX_ERROR;
}
static ngx_int_t
ngx_http_limit_access_free_ip(ngx_http_request_t *r,
ngx_http_limit_access_ctx_t *ctx, in_addr_t ip)
{
ngx_uint_t key;
ngx_http_limit_access_hash_t *hash;
ngx_http_limit_access_bucket_t *bucket, **h, *pre;
hash = ctx->sh;
key = (ngx_uint_t) ip;
h = &hash->buckets[key % ctx->bucket_number];
bucket = *h;
pre = NULL;
while (bucket) {
if (bucket->key == key) {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"limit_access: free, ip=%ud", ntohl(key));
bucket->key = 0;
bucket->expire = 0;
if (*h == bucket) {
*h = bucket->next;
} else if (pre) {
pre->next = bucket->next;
}
ngx_free_limit_access_bucket(ctx, bucket);
return NGX_OK;
}
pre = bucket;
bucket = bucket->next;
}
return NGX_DECLINED;
}
static ngx_int_t
limit_access_show_list(ngx_http_request_t *r, ngx_str_t *value, ngx_flag_t flag)
{
u_char *start, *pos, *last;
ngx_str_t variable;
ngx_buf_t *b;
ngx_int_t rc, is_binary;
in_addr_t ip;
ngx_http_limit_access_ctx_t *ctx;
ngx_http_limit_access_hash_t *hash;
ngx_http_limit_access_conf_t *lacf;
ngx_http_limit_access_request_ctx_t *request_ctx;
request_ctx = ngx_http_get_module_ctx(r, ngx_http_limit_access_module);
if (flag == PROCESS_COMMAND_ATTRIBUTE) {
if ((value->len == 0) ||
((value->len == sizeof("all") - 1) &&
ngx_strncmp(value->data, "all", value->len) == 0)) {
request_ctx->show_all_list = 1;
}
return NGX_OK;
}
lacf = ngx_http_get_module_loc_conf(r, ngx_http_limit_access_module);
if (lacf->shm_zone == NULL) {
return NGX_ERROR;
}
ctx = lacf->shm_zone->data;
hash = ctx->sh;
b = request_ctx->buf;
ngx_shmtx_lock(&ctx->shpool->mutex);
if (!hash->valid) {
b->last = ngx_snprintf(b->last, b->end - b->last,
"Invalid ban hash table!");
ngx_shmtx_unlock(&ctx->shpool->mutex);
return NGX_OK;
}
b->last = ngx_snprintf(b->last, b->end - b->last, "Ban hash table:\n");
is_binary = 0;
rc = NGX_OK;
if ((value->len == 0) ||
((value->len == sizeof("all") - 1) &&
ngx_strncmp(value->data, "all", value->len) == 0)) {
if (ctx->type == HASH_IP) {
rc = ngx_http_limit_access_show_ip(r, ctx, b, INADDR_NONE);
} else if (ctx->type == HASH_VARIABLE) {
rc = ngx_http_limit_access_show_variable(r, ctx, b, NULL);
}
if (rc == NGX_ERROR) {
goto fail;
}
ngx_shmtx_unlock(&ctx->shpool->mutex);
return NGX_OK;
}
last = value->data + value->len;
for (start = pos = value->data; pos < last; pos++) {
if (*pos == ',' || pos == last - 1) {
if (pos == last - 1) {
pos = last;
}
if (ctx->type == HASH_IP) {
if (!is_binary) {
ip = ngx_inet_addr(start, pos - start);
if (ip == INADDR_NONE) {
is_binary = 1;
}
}
if (is_binary) {
ip = (in_addr_t) ngx_atoui(start, pos - start);
if (ip == (in_addr_t) NGX_ERROR) {
goto fail;
}
ip = (in_addr_t) htonl(ip);
}
rc = ngx_http_limit_access_show_ip(r, ctx, b, ip);
} else if (ctx->type == HASH_VARIABLE) {
variable.len = pos - start;
variable.data = start;
rc = ngx_http_limit_access_show_variable(r, ctx, b, &variable);
}
if (rc == NGX_ERROR) {
goto fail;
}
pos++;
start = pos;
}
}
ngx_shmtx_unlock(&ctx->shpool->mutex);
return NGX_OK;
fail:
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"limit_access: invalid show list: \"%V\"", value);
ngx_shmtx_unlock(&ctx->shpool->mutex);
return NGX_ERROR;
}
static ngx_int_t
ngx_http_limit_access_show_ip(ngx_http_request_t *r,
ngx_http_limit_access_ctx_t *ctx, ngx_buf_t *b, in_addr_t ip)
{
u_char addr_buffer[16];
u_char time_buffer[64];
time_t now;
ngx_uint_t i, total;
ngx_http_limit_access_hash_t *hash;
ngx_http_limit_access_bucket_t *bucket;
now = ngx_time();
hash = ctx->sh;
/* show the sepcific ip */
if (ip != INADDR_NONE) {
bucket = hash->buckets[ip % ctx->bucket_number];
ngx_inet_ntop(AF_INET, (void *) &ip, addr_buffer, sizeof(addr_buffer));
while (bucket) {
if (bucket->key == ip) {
if (bucket->expire > now) {
ngx_http_time(time_buffer, bucket->expire);
b->last = ngx_snprintf(b->last, b->end - b->last,
"ip=%s(%ud), expire=%s\n",
addr_buffer, ntohl(bucket->key),
time_buffer);
} else {
b->last = ngx_snprintf(b->last, b->end - b->last,
"ip=%s(%ud), expire=expired\n",
addr_buffer, ntohl(bucket->key));
}
ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"limit_access: show_ip: ip=%s(%ud), expire=%s",
addr_buffer, ntohl(bucket->key), time_buffer);
return NGX_OK;
}
bucket = bucket->next;
}
b->last = ngx_snprintf(b->last, b->end - b->last,
"ip=%s(%ud), there is no this record.\n",
addr_buffer, ntohl(ip));