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ngx_stream_geo_module.c
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/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_stream.h>
typedef struct {
ngx_stream_variable_value_t *value;
u_short start;
u_short end;
} ngx_stream_geo_range_t;
typedef struct {
ngx_radix_tree_t *tree;
#if (NGX_HAVE_INET6)
ngx_radix_tree_t *tree6;
#endif
} ngx_stream_geo_trees_t;
typedef struct {
ngx_stream_geo_range_t **low;
ngx_stream_variable_value_t *default_value;
} ngx_stream_geo_high_ranges_t;
typedef struct {
ngx_str_node_t sn;
ngx_stream_variable_value_t *value;
size_t offset;
} ngx_stream_geo_variable_value_node_t;
typedef struct {
ngx_stream_variable_value_t *value;
ngx_str_t *net;
ngx_stream_geo_high_ranges_t high;
ngx_radix_tree_t *tree;
#if (NGX_HAVE_INET6)
ngx_radix_tree_t *tree6;
#endif
ngx_rbtree_t rbtree;
ngx_rbtree_node_t sentinel;
ngx_pool_t *pool;
ngx_pool_t *temp_pool;
size_t data_size;
ngx_str_t include_name;
ngx_uint_t includes;
ngx_uint_t entries;
unsigned ranges:1;
unsigned outside_entries:1;
unsigned allow_binary_include:1;
unsigned binary_include:1;
} ngx_stream_geo_conf_ctx_t;
typedef struct {
union {
ngx_stream_geo_trees_t trees;
ngx_stream_geo_high_ranges_t high;
} u;
ngx_int_t index;
} ngx_stream_geo_ctx_t;
static ngx_int_t ngx_stream_geo_addr(ngx_stream_session_t *s,
ngx_stream_geo_ctx_t *ctx, ngx_addr_t *addr);
static char *ngx_stream_geo_block(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_stream_geo(ngx_conf_t *cf, ngx_command_t *dummy, void *conf);
static char *ngx_stream_geo_range(ngx_conf_t *cf,
ngx_stream_geo_conf_ctx_t *ctx, ngx_str_t *value);
static char *ngx_stream_geo_add_range(ngx_conf_t *cf,
ngx_stream_geo_conf_ctx_t *ctx, in_addr_t start, in_addr_t end);
static ngx_uint_t ngx_stream_geo_delete_range(ngx_conf_t *cf,
ngx_stream_geo_conf_ctx_t *ctx, in_addr_t start, in_addr_t end);
static char *ngx_stream_geo_cidr(ngx_conf_t *cf,
ngx_stream_geo_conf_ctx_t *ctx, ngx_str_t *value);
static char *ngx_stream_geo_cidr_add(ngx_conf_t *cf,
ngx_stream_geo_conf_ctx_t *ctx, ngx_cidr_t *cidr, ngx_str_t *value,
ngx_str_t *net);
static ngx_stream_variable_value_t *ngx_stream_geo_value(ngx_conf_t *cf,
ngx_stream_geo_conf_ctx_t *ctx, ngx_str_t *value);
static ngx_int_t ngx_stream_geo_cidr_value(ngx_conf_t *cf, ngx_str_t *net,
ngx_cidr_t *cidr);
static char *ngx_stream_geo_include(ngx_conf_t *cf,
ngx_stream_geo_conf_ctx_t *ctx, ngx_str_t *name);
static ngx_int_t ngx_stream_geo_include_binary_base(ngx_conf_t *cf,
ngx_stream_geo_conf_ctx_t *ctx, ngx_str_t *name);
static void ngx_stream_geo_create_binary_base(ngx_stream_geo_conf_ctx_t *ctx);
static u_char *ngx_stream_geo_copy_values(u_char *base, u_char *p,
ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel);
static ngx_command_t ngx_stream_geo_commands[] = {
{ ngx_string("geo"),
NGX_STREAM_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE12,
ngx_stream_geo_block,
0,
0,
NULL },
ngx_null_command
};
static ngx_stream_module_t ngx_stream_geo_module_ctx = {
NULL, /* preconfiguration */
NULL, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL /* merge server configuration */
};
ngx_module_t ngx_stream_geo_module = {
NGX_MODULE_V1,
&ngx_stream_geo_module_ctx, /* module context */
ngx_stream_geo_commands, /* module directives */
NGX_STREAM_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
};
typedef struct {
u_char GEORNG[6];
u_char version;
u_char ptr_size;
uint32_t endianness;
uint32_t crc32;
} ngx_stream_geo_header_t;
static ngx_stream_geo_header_t ngx_stream_geo_header = {
{ 'G', 'E', 'O', 'R', 'N', 'G' }, 0, sizeof(void *), 0x12345678, 0
};
/* geo range is AF_INET only */
static ngx_int_t
ngx_stream_geo_cidr_variable(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
ngx_stream_geo_ctx_t *ctx = (ngx_stream_geo_ctx_t *) data;
in_addr_t inaddr;
ngx_addr_t addr;
struct sockaddr_in *sin;
ngx_stream_variable_value_t *vv;
#if (NGX_HAVE_INET6)
u_char *p;
struct in6_addr *inaddr6;
#endif
if (ngx_stream_geo_addr(s, ctx, &addr) != NGX_OK) {
vv = (ngx_stream_variable_value_t *)
ngx_radix32tree_find(ctx->u.trees.tree, INADDR_NONE);
goto done;
}
switch (addr.sockaddr->sa_family) {
#if (NGX_HAVE_INET6)
case AF_INET6:
inaddr6 = &((struct sockaddr_in6 *) addr.sockaddr)->sin6_addr;
p = inaddr6->s6_addr;
if (IN6_IS_ADDR_V4MAPPED(inaddr6)) {
inaddr = (in_addr_t) p[12] << 24;
inaddr += p[13] << 16;
inaddr += p[14] << 8;
inaddr += p[15];
vv = (ngx_stream_variable_value_t *)
ngx_radix32tree_find(ctx->u.trees.tree, inaddr);
} else {
vv = (ngx_stream_variable_value_t *)
ngx_radix128tree_find(ctx->u.trees.tree6, p);
}
break;
#endif
#if (NGX_HAVE_UNIX_DOMAIN)
case AF_UNIX:
vv = (ngx_stream_variable_value_t *)
ngx_radix32tree_find(ctx->u.trees.tree, INADDR_NONE);
break;
#endif
default: /* AF_INET */
sin = (struct sockaddr_in *) addr.sockaddr;
inaddr = ntohl(sin->sin_addr.s_addr);
vv = (ngx_stream_variable_value_t *)
ngx_radix32tree_find(ctx->u.trees.tree, inaddr);
break;
}
done:
*v = *vv;
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream geo: %v", v);
return NGX_OK;
}
static ngx_int_t
ngx_stream_geo_range_variable(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
ngx_stream_geo_ctx_t *ctx = (ngx_stream_geo_ctx_t *) data;
in_addr_t inaddr;
ngx_addr_t addr;
ngx_uint_t n;
struct sockaddr_in *sin;
ngx_stream_geo_range_t *range;
#if (NGX_HAVE_INET6)
u_char *p;
struct in6_addr *inaddr6;
#endif
*v = *ctx->u.high.default_value;
if (ngx_stream_geo_addr(s, ctx, &addr) == NGX_OK) {
switch (addr.sockaddr->sa_family) {
#if (NGX_HAVE_INET6)
case AF_INET6:
inaddr6 = &((struct sockaddr_in6 *) addr.sockaddr)->sin6_addr;
if (IN6_IS_ADDR_V4MAPPED(inaddr6)) {
p = inaddr6->s6_addr;
inaddr = (in_addr_t) p[12] << 24;
inaddr += p[13] << 16;
inaddr += p[14] << 8;
inaddr += p[15];
} else {
inaddr = INADDR_NONE;
}
break;
#endif
#if (NGX_HAVE_UNIX_DOMAIN)
case AF_UNIX:
inaddr = INADDR_NONE;
break;
#endif
default: /* AF_INET */
sin = (struct sockaddr_in *) addr.sockaddr;
inaddr = ntohl(sin->sin_addr.s_addr);
break;
}
} else {
inaddr = INADDR_NONE;
}
if (ctx->u.high.low) {
range = ctx->u.high.low[inaddr >> 16];
if (range) {
n = inaddr & 0xffff;
do {
if (n >= (ngx_uint_t) range->start
&& n <= (ngx_uint_t) range->end)
{
*v = *range->value;
break;
}
} while ((++range)->value);
}
}
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream geo: %v", v);
return NGX_OK;
}
static ngx_int_t
ngx_stream_geo_addr(ngx_stream_session_t *s, ngx_stream_geo_ctx_t *ctx,
ngx_addr_t *addr)
{
ngx_stream_variable_value_t *v;
if (ctx->index == -1) {
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream geo started: %V", &s->connection->addr_text);
addr->sockaddr = s->connection->sockaddr;
addr->socklen = s->connection->socklen;
/* addr->name = s->connection->addr_text; */
return NGX_OK;
}
v = ngx_stream_get_flushed_variable(s, ctx->index);
if (v == NULL || v->not_found) {
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream geo not found");
return NGX_ERROR;
}
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream geo started: %v", v);
if (ngx_parse_addr(s->connection->pool, addr, v->data, v->len) == NGX_OK) {
return NGX_OK;
}
return NGX_ERROR;
}
static char *
ngx_stream_geo_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
char *rv;
size_t len;
ngx_str_t *value, name;
ngx_uint_t i;
ngx_conf_t save;
ngx_pool_t *pool;
ngx_array_t *a;
ngx_stream_variable_t *var;
ngx_stream_geo_ctx_t *geo;
ngx_stream_geo_conf_ctx_t ctx;
#if (NGX_HAVE_INET6)
static struct in6_addr zero;
#endif
value = cf->args->elts;
geo = ngx_palloc(cf->pool, sizeof(ngx_stream_geo_ctx_t));
if (geo == NULL) {
return NGX_CONF_ERROR;
}
name = value[1];
if (name.data[0] != '$') {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid variable name \"%V\"", &name);
return NGX_CONF_ERROR;
}
name.len--;
name.data++;
if (cf->args->nelts == 3) {
geo->index = ngx_stream_get_variable_index(cf, &name);
if (geo->index == NGX_ERROR) {
return NGX_CONF_ERROR;
}
name = value[2];
if (name.data[0] != '$') {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid variable name \"%V\"", &name);
return NGX_CONF_ERROR;
}
name.len--;
name.data++;
} else {
geo->index = -1;
}
var = ngx_stream_add_variable(cf, &name, NGX_STREAM_VAR_CHANGEABLE);
if (var == NULL) {
return NGX_CONF_ERROR;
}
pool = ngx_create_pool(NGX_DEFAULT_POOL_SIZE, cf->log);
if (pool == NULL) {
return NGX_CONF_ERROR;
}
ngx_memzero(&ctx, sizeof(ngx_stream_geo_conf_ctx_t));
ctx.temp_pool = ngx_create_pool(NGX_DEFAULT_POOL_SIZE, cf->log);
if (ctx.temp_pool == NULL) {
ngx_destroy_pool(pool);
return NGX_CONF_ERROR;
}
ngx_rbtree_init(&ctx.rbtree, &ctx.sentinel, ngx_str_rbtree_insert_value);
ctx.pool = cf->pool;
ctx.data_size = sizeof(ngx_stream_geo_header_t)
+ sizeof(ngx_stream_variable_value_t)
+ 0x10000 * sizeof(ngx_stream_geo_range_t *);
ctx.allow_binary_include = 1;
save = *cf;
cf->pool = pool;
cf->ctx = &ctx;
cf->handler = ngx_stream_geo;
cf->handler_conf = conf;
rv = ngx_conf_parse(cf, NULL);
*cf = save;
if (rv != NGX_CONF_OK) {
goto failed;
}
if (ctx.ranges) {
if (ctx.high.low && !ctx.binary_include) {
for (i = 0; i < 0x10000; i++) {
a = (ngx_array_t *) ctx.high.low[i];
if (a == NULL) {
continue;
}
if (a->nelts == 0) {
ctx.high.low[i] = NULL;
continue;
}
len = a->nelts * sizeof(ngx_stream_geo_range_t);
ctx.high.low[i] = ngx_palloc(cf->pool, len + sizeof(void *));
if (ctx.high.low[i] == NULL) {
goto failed;
}
ngx_memcpy(ctx.high.low[i], a->elts, len);
ctx.high.low[i][a->nelts].value = NULL;
ctx.data_size += len + sizeof(void *);
}
if (ctx.allow_binary_include
&& !ctx.outside_entries
&& ctx.entries > 100000
&& ctx.includes == 1)
{
ngx_stream_geo_create_binary_base(&ctx);
}
}
if (ctx.high.default_value == NULL) {
ctx.high.default_value = &ngx_stream_variable_null_value;
}
geo->u.high = ctx.high;
var->get_handler = ngx_stream_geo_range_variable;
var->data = (uintptr_t) geo;
} else {
if (ctx.tree == NULL) {
ctx.tree = ngx_radix_tree_create(cf->pool, -1);
if (ctx.tree == NULL) {
goto failed;
}
}
geo->u.trees.tree = ctx.tree;
#if (NGX_HAVE_INET6)
if (ctx.tree6 == NULL) {
ctx.tree6 = ngx_radix_tree_create(cf->pool, -1);
if (ctx.tree6 == NULL) {
goto failed;
}
}
geo->u.trees.tree6 = ctx.tree6;
#endif
var->get_handler = ngx_stream_geo_cidr_variable;
var->data = (uintptr_t) geo;
if (ngx_radix32tree_insert(ctx.tree, 0, 0,
(uintptr_t) &ngx_stream_variable_null_value)
== NGX_ERROR)
{
goto failed;
}
/* NGX_BUSY is okay (default was set explicitly) */
#if (NGX_HAVE_INET6)
if (ngx_radix128tree_insert(ctx.tree6, zero.s6_addr, zero.s6_addr,
(uintptr_t) &ngx_stream_variable_null_value)
== NGX_ERROR)
{
goto failed;
}
#endif
}
ngx_destroy_pool(ctx.temp_pool);
ngx_destroy_pool(pool);
return NGX_CONF_OK;
failed:
ngx_destroy_pool(ctx.temp_pool);
ngx_destroy_pool(pool);
return NGX_CONF_ERROR;
}
static char *
ngx_stream_geo(ngx_conf_t *cf, ngx_command_t *dummy, void *conf)
{
char *rv;
ngx_str_t *value;
ngx_stream_geo_conf_ctx_t *ctx;
ctx = cf->ctx;
value = cf->args->elts;
if (cf->args->nelts == 1) {
if (ngx_strcmp(value[0].data, "ranges") == 0) {
if (ctx->tree
#if (NGX_HAVE_INET6)
|| ctx->tree6
#endif
)
{
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"the \"ranges\" directive must be "
"the first directive inside \"geo\" block");
goto failed;
}
ctx->ranges = 1;
rv = NGX_CONF_OK;
goto done;
}
}
if (cf->args->nelts != 2) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid number of the geo parameters");
goto failed;
}
if (ngx_strcmp(value[0].data, "include") == 0) {
rv = ngx_stream_geo_include(cf, ctx, &value[1]);
goto done;
}
if (ctx->ranges) {
rv = ngx_stream_geo_range(cf, ctx, value);
} else {
rv = ngx_stream_geo_cidr(cf, ctx, value);
}
done:
ngx_reset_pool(cf->pool);
return rv;
failed:
ngx_reset_pool(cf->pool);
return NGX_CONF_ERROR;
}
static char *
ngx_stream_geo_range(ngx_conf_t *cf, ngx_stream_geo_conf_ctx_t *ctx,
ngx_str_t *value)
{
u_char *p, *last;
in_addr_t start, end;
ngx_str_t *net;
ngx_uint_t del;
if (ngx_strcmp(value[0].data, "default") == 0) {
if (ctx->high.default_value) {
ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
"duplicate default geo range value: \"%V\", old value: \"%v\"",
&value[1], ctx->high.default_value);
}
ctx->high.default_value = ngx_stream_geo_value(cf, ctx, &value[1]);
if (ctx->high.default_value == NULL) {
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
if (ctx->binary_include) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"binary geo range base \"%s\" cannot be mixed with usual entries",
ctx->include_name.data);
return NGX_CONF_ERROR;
}
if (ctx->high.low == NULL) {
ctx->high.low = ngx_pcalloc(ctx->pool,
0x10000 * sizeof(ngx_stream_geo_range_t *));
if (ctx->high.low == NULL) {
return NGX_CONF_ERROR;
}
}
ctx->entries++;
ctx->outside_entries = 1;
if (ngx_strcmp(value[0].data, "delete") == 0) {
net = &value[1];
del = 1;
} else {
net = &value[0];
del = 0;
}
last = net->data + net->len;
p = ngx_strlchr(net->data, last, '-');
if (p == NULL) {
goto invalid;
}
start = ngx_inet_addr(net->data, p - net->data);
if (start == INADDR_NONE) {
goto invalid;
}
start = ntohl(start);
p++;
end = ngx_inet_addr(p, last - p);
if (end == INADDR_NONE) {
goto invalid;
}
end = ntohl(end);
if (start > end) {
goto invalid;
}
if (del) {
if (ngx_stream_geo_delete_range(cf, ctx, start, end)) {
ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
"no address range \"%V\" to delete", net);
}
return NGX_CONF_OK;
}
ctx->value = ngx_stream_geo_value(cf, ctx, &value[1]);
if (ctx->value == NULL) {
return NGX_CONF_ERROR;
}
ctx->net = net;
return ngx_stream_geo_add_range(cf, ctx, start, end);
invalid:
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid range \"%V\"", net);
return NGX_CONF_ERROR;
}
/* the add procedure is optimized to add a growing up sequence */
static char *
ngx_stream_geo_add_range(ngx_conf_t *cf, ngx_stream_geo_conf_ctx_t *ctx,
in_addr_t start, in_addr_t end)
{
in_addr_t n;
ngx_uint_t h, i, s, e;
ngx_array_t *a;
ngx_stream_geo_range_t *range;
for (n = start; n <= end; n = (n + 0x10000) & 0xffff0000) {
h = n >> 16;
if (n == start) {
s = n & 0xffff;
} else {
s = 0;
}
if ((n | 0xffff) > end) {
e = end & 0xffff;
} else {
e = 0xffff;
}
a = (ngx_array_t *) ctx->high.low[h];
if (a == NULL) {
a = ngx_array_create(ctx->temp_pool, 64,
sizeof(ngx_stream_geo_range_t));
if (a == NULL) {
return NGX_CONF_ERROR;
}
ctx->high.low[h] = (ngx_stream_geo_range_t *) a;
}
i = a->nelts;
range = a->elts;
while (i) {
i--;
if (e < (ngx_uint_t) range[i].start) {
continue;
}
if (s > (ngx_uint_t) range[i].end) {
/* add after the range */
range = ngx_array_push(a);
if (range == NULL) {
return NGX_CONF_ERROR;
}
range = a->elts;
ngx_memmove(&range[i + 2], &range[i + 1],
(a->nelts - 2 - i) * sizeof(ngx_stream_geo_range_t));
range[i + 1].start = (u_short) s;
range[i + 1].end = (u_short) e;
range[i + 1].value = ctx->value;
goto next;
}
if (s == (ngx_uint_t) range[i].start
&& e == (ngx_uint_t) range[i].end)
{
ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
"duplicate range \"%V\", value: \"%v\", old value: \"%v\"",
ctx->net, ctx->value, range[i].value);
range[i].value = ctx->value;
goto next;
}
if (s > (ngx_uint_t) range[i].start
&& e < (ngx_uint_t) range[i].end)
{
/* split the range and insert the new one */
range = ngx_array_push(a);
if (range == NULL) {
return NGX_CONF_ERROR;
}
range = ngx_array_push(a);
if (range == NULL) {
return NGX_CONF_ERROR;
}
range = a->elts;
ngx_memmove(&range[i + 3], &range[i + 1],
(a->nelts - 3 - i) * sizeof(ngx_stream_geo_range_t));
range[i + 2].start = (u_short) (e + 1);
range[i + 2].end = range[i].end;
range[i + 2].value = range[i].value;
range[i + 1].start = (u_short) s;
range[i + 1].end = (u_short) e;
range[i + 1].value = ctx->value;
range[i].end = (u_short) (s - 1);
goto next;
}
if (s == (ngx_uint_t) range[i].start
&& e < (ngx_uint_t) range[i].end)
{
/* shift the range start and insert the new range */
range = ngx_array_push(a);
if (range == NULL) {
return NGX_CONF_ERROR;
}
range = a->elts;
ngx_memmove(&range[i + 1], &range[i],
(a->nelts - 1 - i) * sizeof(ngx_stream_geo_range_t));
range[i + 1].start = (u_short) (e + 1);
range[i].start = (u_short) s;
range[i].end = (u_short) e;
range[i].value = ctx->value;
goto next;
}
if (s > (ngx_uint_t) range[i].start
&& e == (ngx_uint_t) range[i].end)
{
/* shift the range end and insert the new range */
range = ngx_array_push(a);
if (range == NULL) {
return NGX_CONF_ERROR;
}
range = a->elts;
ngx_memmove(&range[i + 2], &range[i + 1],
(a->nelts - 2 - i) * sizeof(ngx_stream_geo_range_t));
range[i + 1].start = (u_short) s;
range[i + 1].end = (u_short) e;
range[i + 1].value = ctx->value;
range[i].end = (u_short) (s - 1);
goto next;
}
s = (ngx_uint_t) range[i].start;
e = (ngx_uint_t) range[i].end;
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"range \"%V\" overlaps \"%d.%d.%d.%d-%d.%d.%d.%d\"",
ctx->net,
h >> 8, h & 0xff, s >> 8, s & 0xff,
h >> 8, h & 0xff, e >> 8, e & 0xff);
return NGX_CONF_ERROR;
}
/* add the first range */
range = ngx_array_push(a);
if (range == NULL) {
return NGX_CONF_ERROR;
}
range = a->elts;
ngx_memmove(&range[1], &range[0],
(a->nelts - 1) * sizeof(ngx_stream_geo_range_t));
range[0].start = (u_short) s;
range[0].end = (u_short) e;
range[0].value = ctx->value;
next:
if (h == 0xffff) {
break;
}
}
return NGX_CONF_OK;
}
static ngx_uint_t
ngx_stream_geo_delete_range(ngx_conf_t *cf, ngx_stream_geo_conf_ctx_t *ctx,
in_addr_t start, in_addr_t end)
{
in_addr_t n;
ngx_uint_t h, i, s, e, warn;
ngx_array_t *a;
ngx_stream_geo_range_t *range;
warn = 0;
for (n = start; n <= end; n = (n + 0x10000) & 0xffff0000) {
h = n >> 16;
if (n == start) {
s = n & 0xffff;
} else {
s = 0;
}
if ((n | 0xffff) > end) {
e = end & 0xffff;
} else {
e = 0xffff;
}
a = (ngx_array_t *) ctx->high.low[h];
if (a == NULL || a->nelts == 0) {
warn = 1;
goto next;
}
range = a->elts;
for (i = 0; i < a->nelts; i++) {
if (s == (ngx_uint_t) range[i].start
&& e == (ngx_uint_t) range[i].end)
{
ngx_memmove(&range[i], &range[i + 1],
(a->nelts - 1 - i) * sizeof(ngx_stream_geo_range_t));
a->nelts--;
break;
}
if (i == a->nelts - 1) {
warn = 1;
}
}
next:
if (h == 0xffff) {
break;
}
}
return warn;
}
static char *