/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_stream.h>
#include <nginx.h>
static ngx_stream_variable_t *ngx_stream_add_prefix_variable(ngx_conf_t *cf,
ngx_str_t *name, ngx_uint_t flags);
static ngx_int_t ngx_stream_variable_binary_remote_addr(
ngx_stream_session_t *s, ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_remote_addr(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_remote_port(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_proxy_protocol_addr(
ngx_stream_session_t *s, ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_proxy_protocol_port(
ngx_stream_session_t *s, ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_proxy_protocol_tlv(
ngx_stream_session_t *s, ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_server_addr(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_server_port(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_server_name(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_bytes(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_session_time(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_status(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_connection(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_nginx_version(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_hostname(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_pid(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_msec(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_time_iso8601(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_time_local(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_variable_protocol(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_stream_variable_t ngx_stream_core_variables[] = {
{ ngx_string("binary_remote_addr"), NULL,
ngx_stream_variable_binary_remote_addr, 0, 0, 0 },
{ ngx_string("remote_addr"), NULL,
ngx_stream_variable_remote_addr, 0, 0, 0 },
{ ngx_string("remote_port"), NULL,
ngx_stream_variable_remote_port, 0, 0, 0 },
{ ngx_string("proxy_protocol_addr"), NULL,
ngx_stream_variable_proxy_protocol_addr,
offsetof(ngx_proxy_protocol_t, src_addr), 0, 0 },
{ ngx_string("proxy_protocol_port"), NULL,
ngx_stream_variable_proxy_protocol_port,
offsetof(ngx_proxy_protocol_t, src_port), 0, 0 },
{ ngx_string("proxy_protocol_server_addr"), NULL,
ngx_stream_variable_proxy_protocol_addr,
offsetof(ngx_proxy_protocol_t, dst_addr), 0, 0 },
{ ngx_string("proxy_protocol_server_port"), NULL,
ngx_stream_variable_proxy_protocol_port,
offsetof(ngx_proxy_protocol_t, dst_port), 0, 0 },
{ ngx_string("proxy_protocol_tlv_"), NULL,
ngx_stream_variable_proxy_protocol_tlv,
0, NGX_STREAM_VAR_PREFIX, 0 },
{ ngx_string("server_addr"), NULL,
ngx_stream_variable_server_addr, 0, 0, 0 },
{ ngx_string("server_port"), NULL,
ngx_stream_variable_server_port, 0, 0, 0 },
{ ngx_string("server_name"), NULL, ngx_stream_variable_server_name,
0, 0, 0 },
{ ngx_string("bytes_sent"), NULL, ngx_stream_variable_bytes,
0, 0, 0 },
{ ngx_string("bytes_received"), NULL, ngx_stream_variable_bytes,
1, 0, 0 },
{ ngx_string("session_time"), NULL, ngx_stream_variable_session_time,
0, NGX_STREAM_VAR_NOCACHEABLE, 0 },
{ ngx_string("status"), NULL, ngx_stream_variable_status,
0, NGX_STREAM_VAR_NOCACHEABLE, 0 },
{ ngx_string("connection"), NULL,
ngx_stream_variable_connection, 0, 0, 0 },
{ ngx_string("nginx_version"), NULL, ngx_stream_variable_nginx_version,
0, 0, 0 },
{ ngx_string("hostname"), NULL, ngx_stream_variable_hostname,
0, 0, 0 },
{ ngx_string("pid"), NULL, ngx_stream_variable_pid,
0, 0, 0 },
{ ngx_string("msec"), NULL, ngx_stream_variable_msec,
0, NGX_STREAM_VAR_NOCACHEABLE, 0 },
{ ngx_string("time_iso8601"), NULL, ngx_stream_variable_time_iso8601,
0, NGX_STREAM_VAR_NOCACHEABLE, 0 },
{ ngx_string("time_local"), NULL, ngx_stream_variable_time_local,
0, NGX_STREAM_VAR_NOCACHEABLE, 0 },
{ ngx_string("protocol"), NULL,
ngx_stream_variable_protocol, 0, 0, 0 },
ngx_stream_null_variable
};
ngx_stream_variable_value_t ngx_stream_variable_null_value =
ngx_stream_variable("");
ngx_stream_variable_value_t ngx_stream_variable_true_value =
ngx_stream_variable("1");
static ngx_uint_t ngx_stream_variable_depth = 100;
ngx_stream_variable_t *
ngx_stream_add_variable(ngx_conf_t *cf, ngx_str_t *name, ngx_uint_t flags)
{
ngx_int_t rc;
ngx_uint_t i;
ngx_hash_key_t *key;
ngx_stream_variable_t *v;
ngx_stream_core_main_conf_t *cmcf;
if (name->len == 0) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid variable name \"$\"");
return NULL;
}
if (flags & NGX_STREAM_VAR_PREFIX) {
return ngx_stream_add_prefix_variable(cf, name, flags);
}
cmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_core_module);
key = cmcf->variables_keys->keys.elts;
for (i = 0; i < cmcf->variables_keys->keys.nelts; i++) {
if (name->len != key[i].key.len
|| ngx_strncasecmp(name->data, key[i].key.data, name->len) != 0)
{
continue;
}
v = key[i].value;
if (!(v->flags & NGX_STREAM_VAR_CHANGEABLE)) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"the duplicate \"%V\" variable", name);
return NULL;
}
if (!(flags & NGX_STREAM_VAR_WEAK)) {
v->flags &= ~NGX_STREAM_VAR_WEAK;
}
return v;
}
v = ngx_palloc(cf->pool, sizeof(ngx_stream_variable_t));
if (v == NULL) {
return NULL;
}
v->name.len = name->len;
v->name.data = ngx_pnalloc(cf->pool, name->len);
if (v->name.data == NULL) {
return NULL;
}
ngx_strlow(v->name.data, name->data, name->len);
v->set_handler = NULL;
v->get_handler = NULL;
v->data = 0;
v->flags = flags;
v->index = 0;
rc = ngx_hash_add_key(cmcf->variables_keys, &v->name, v, 0);
if (rc == NGX_ERROR) {
return NULL;
}
if (rc == NGX_BUSY) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"conflicting variable name \"%V\"", name);
return NULL;
}
return v;
}
static ngx_stream_variable_t *
ngx_stream_add_prefix_variable(ngx_conf_t *cf, ngx_str_t *name,
ngx_uint_t flags)
{
ngx_uint_t i;
ngx_stream_variable_t *v;
ngx_stream_core_main_conf_t *cmcf;
cmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_core_module);
v = cmcf->prefix_variables.elts;
for (i = 0; i < cmcf->prefix_variables.nelts; i++) {
if (name->len != v[i].name.len
|| ngx_strncasecmp(name->data, v[i].name.data, name->len) != 0)
{
continue;
}
v = &v[i];
if (!(v->flags & NGX_STREAM_VAR_CHANGEABLE)) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"the duplicate \"%V\" variable", name);
return NULL;
}
if (!(flags & NGX_STREAM_VAR_WEAK)) {
v->flags &= ~NGX_STREAM_VAR_WEAK;
}
return v;
}
v = ngx_array_push(&cmcf->prefix_variables);
if (v == NULL) {
return NULL;
}
v->name.len = name->len;
v->name.data = ngx_pnalloc(cf->pool, name->len);
if (v->name.data == NULL) {
return NULL;
}
ngx_strlow(v->name.data, name->data, name->len);
v->set_handler = NULL;
v->get_handler = NULL;
v->data = 0;
v->flags = flags;
v->index = 0;
return v;
}
ngx_int_t
ngx_stream_get_variable_index(ngx_conf_t *cf, ngx_str_t *name)
{
ngx_uint_t i;
ngx_stream_variable_t *v;
ngx_stream_core_main_conf_t *cmcf;
if (name->len == 0) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid variable name \"$\"");
return NGX_ERROR;
}
cmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_core_module);
v = cmcf->variables.elts;
if (v == NULL) {
if (ngx_array_init(&cmcf->variables, cf->pool, 4,
sizeof(ngx_stream_variable_t))
!= NGX_OK)
{
return NGX_ERROR;
}
} else {
for (i = 0; i < cmcf->variables.nelts; i++) {
if (name->len != v[i].name.len
|| ngx_strncasecmp(name->data, v[i].name.data, name->len) != 0)
{
continue;
}
return i;
}
}
v = ngx_array_push(&cmcf->variables);
if (v == NULL) {
return NGX_ERROR;
}
v->name.len = name->len;
v->name.data = ngx_pnalloc(cf->pool, name->len);
if (v->name.data == NULL) {
return NGX_ERROR;
}
ngx_strlow(v->name.data, name->data, name->len);
v->set_handler = NULL;
v->get_handler = NULL;
v->data = 0;
v->flags = 0;
v->index = cmcf->variables.nelts - 1;
return v->index;
}
ngx_stream_variable_value_t *
ngx_stream_get_indexed_variable(ngx_stream_session_t *s, ngx_uint_t index)
{
ngx_stream_variable_t *v;
ngx_stream_core_main_conf_t *cmcf;
cmcf = ngx_stream_get_module_main_conf(s, ngx_stream_core_module);
if (cmcf->variables.nelts <= index) {
ngx_log_error(NGX_LOG_ALERT, s->connection->log, 0,
"unknown variable index: %ui", index);
return NULL;
}
if (s->variables[index].not_found || s->variables[index].valid) {
return &s->variables[index];
}
v = cmcf->variables.elts;
if (ngx_stream_variable_depth == 0) {
ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
"cycle while evaluating variable \"%V\"",
&v[index].name);
return NULL;
}
ngx_stream_variable_depth--;
if (v[index].get_handler(s, &s->variables[index], v[index].data)
== NGX_OK)
{
ngx_stream_variable_depth++;
if (v[index].flags & NGX_STREAM_VAR_NOCACHEABLE) {
s->variables[index].no_cacheable = 1;
}
return &s->variables[index];
}
ngx_stream_variable_depth++;
s->variables[index].valid = 0;
s->variables[index].not_found = 1;
return NULL;
}
ngx_stream_variable_value_t *
ngx_stream_get_flushed_variable(ngx_stream_session_t *s, ngx_uint_t index)
{
ngx_stream_variable_value_t *v;
v = &s->variables[index];
if (v->valid || v->not_found) {
if (!v->no_cacheable) {
return v;
}
v->valid = 0;
v->not_found = 0;
}
return ngx_stream_get_indexed_variable(s, index);
}
ngx_stream_variable_value_t *
ngx_stream_get_variable(ngx_stream_session_t *s, ngx_str_t *name,
ngx_uint_t key)
{
size_t len;
ngx_uint_t i, n;
ngx_stream_variable_t *v;
ngx_stream_variable_value_t *vv;
ngx_stream_core_main_conf_t *cmcf;
cmcf = ngx_stream_get_module_main_conf(s, ngx_stream_core_module);
v = ngx_hash_find(&cmcf->variables_hash, key, name->data, name->len);
if (v) {
if (v->flags & NGX_STREAM_VAR_INDEXED) {
return ngx_stream_get_flushed_variable(s, v->index);
}
if (ngx_stream_variable_depth == 0) {
ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
"cycle while evaluating variable \"%V\"", name);
return NULL;
}
ngx_stream_variable_depth--;
vv = ngx_palloc(s->connection->pool,
sizeof(ngx_stream_variable_value_t));
if (vv && v->get_handler(s, vv, v->data) == NGX_OK) {
ngx_stream_variable_depth++;
return vv;
}
ngx_stream_variable_depth++;
return NULL;
}
vv = ngx_palloc(s->connection->pool, sizeof(ngx_stream_variable_value_t));
if (vv == NULL) {
return NULL;
}
len = 0;
v = cmcf->prefix_variables.elts;
n = cmcf->prefix_variables.nelts;
for (i = 0; i < cmcf->prefix_variables.nelts; i++) {
if (name->len >= v[i].name.len && name->len > len
&& ngx_strncmp(name->data, v[i].name.data, v[i].name.len) == 0)
{
len = v[i].name.len;
n = i;
}
}
if (n != cmcf->prefix_variables.nelts) {
if (v[n].get_handler(s, vv, (uintptr_t) name) == NGX_OK) {
return vv;
}
return NULL;
}
vv->not_found = 1;
return vv;
}
static ngx_int_t
ngx_stream_variable_binary_remote_addr(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
struct sockaddr_in *sin;
#if (NGX_HAVE_INET6)
struct sockaddr_in6 *sin6;
#endif
switch (s->connection->sockaddr->sa_family) {
#if (NGX_HAVE_INET6)
case AF_INET6:
sin6 = (struct sockaddr_in6 *) s->connection->sockaddr;
v->len = sizeof(struct in6_addr);
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = sin6->sin6_addr.s6_addr;
break;
#endif
#if (NGX_HAVE_UNIX_DOMAIN)
case AF_UNIX:
v->len = s->connection->addr_text.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = s->connection->addr_text.data;
break;
#endif
default: /* AF_INET */
sin = (struct sockaddr_in *) s->connection->sockaddr;
v->len = sizeof(in_addr_t);
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = (u_char *) &sin->sin_addr;
break;
}
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_remote_addr(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
v->len = s->connection->addr_text.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = s->connection->addr_text.data;
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_remote_port(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
ngx_uint_t port;
v->len = 0;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = ngx_pnalloc(s->connection->pool, sizeof("65535") - 1);
if (v->data == NULL) {
return NGX_ERROR;
}
port = ngx_inet_get_port(s->connection->sockaddr);
if (port > 0 && port < 65536) {
v->len = ngx_sprintf(v->data, "%ui", port) - v->data;
}
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_proxy_protocol_addr(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
ngx_str_t *addr;
ngx_proxy_protocol_t *pp;
pp = s->connection->proxy_protocol;
if (pp == NULL) {
v->not_found = 1;
return NGX_OK;
}
addr = (ngx_str_t *) ((char *) pp + data);
v->len = addr->len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = addr->data;
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_proxy_protocol_port(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
ngx_uint_t port;
ngx_proxy_protocol_t *pp;
pp = s->connection->proxy_protocol;
if (pp == NULL) {
v->not_found = 1;
return NGX_OK;
}
v->len = 0;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = ngx_pnalloc(s->connection->pool, sizeof("65535") - 1);
if (v->data == NULL) {
return NGX_ERROR;
}
port = *(in_port_t *) ((char *) pp + data);
if (port > 0 && port < 65536) {
v->len = ngx_sprintf(v->data, "%ui", port) - v->data;
}
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_proxy_protocol_tlv(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
ngx_str_t *name = (ngx_str_t *) data;
ngx_int_t rc;
ngx_str_t tlv, value;
tlv.len = name->len - (sizeof("proxy_protocol_tlv_") - 1);
tlv.data = name->data + sizeof("proxy_protocol_tlv_") - 1;
rc = ngx_proxy_protocol_get_tlv(s->connection, &tlv, &value);
if (rc == NGX_ERROR) {
return NGX_ERROR;
}
if (rc == NGX_DECLINED) {
v->not_found = 1;
return NGX_OK;
}
v->len = value.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = value.data;
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_server_addr(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
ngx_str_t str;
u_char addr[NGX_SOCKADDR_STRLEN];
str.len = NGX_SOCKADDR_STRLEN;
str.data = addr;
if (ngx_connection_local_sockaddr(s->connection, &str, 0) != NGX_OK) {
return NGX_ERROR;
}
str.data = ngx_pnalloc(s->connection->pool, str.len);
if (str.data == NULL) {
return NGX_ERROR;
}
ngx_memcpy(str.data, addr, str.len);
v->len = str.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = str.data;
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_server_port(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
ngx_uint_t port;
v->len = 0;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
if (ngx_connection_local_sockaddr(s->connection, NULL, 0) != NGX_OK) {
return NGX_ERROR;
}
v->data = ngx_pnalloc(s->connection->pool, sizeof("65535") - 1);
if (v->data == NULL) {
return NGX_ERROR;
}
port = ngx_inet_get_port(s->connection->local_sockaddr);
if (port > 0 && port < 65536) {
v->len = ngx_sprintf(v->data, "%ui", port) - v->data;
}
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_server_name(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
ngx_stream_core_srv_conf_t *cscf;
cscf = ngx_stream_get_module_srv_conf(s, ngx_stream_core_module);
v->len = cscf->server_name.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = cscf->server_name.data;
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_bytes(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
u_char *p;
p = ngx_pnalloc(s->connection->pool, NGX_OFF_T_LEN);
if (p == NULL) {
return NGX_ERROR;
}
if (data == 1) {
v->len = ngx_sprintf(p, "%O", s->received) - p;
} else {
v->len = ngx_sprintf(p, "%O", s->connection->sent) - p;
}
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_session_time(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
u_char *p;
ngx_time_t *tp;
ngx_msec_int_t ms;
p = ngx_pnalloc(s->connection->pool, NGX_TIME_T_LEN + 4);
if (p == NULL) {
return NGX_ERROR;
}
tp = ngx_timeofday();
ms = (ngx_msec_int_t)
((tp->sec - s->start_sec) * 1000 + (tp->msec - s->start_msec));
ms = ngx_max(ms, 0);
v->len = ngx_sprintf(p, "%T.%03M", (time_t) ms / 1000, ms % 1000) - p;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_status(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
v->data = ngx_pnalloc(s->connection->pool, NGX_INT_T_LEN);
if (v->data == NULL) {
return NGX_ERROR;
}
v->len = ngx_sprintf(v->data, "%03ui", s->status) - v->data;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_connection(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
u_char *p;
p = ngx_pnalloc(s->connection->pool, NGX_ATOMIC_T_LEN);
if (p == NULL) {
return NGX_ERROR;
}
v->len = ngx_sprintf(p, "%uA", s->connection->number) - p;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_nginx_version(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
v->len = sizeof(NGINX_VERSION) - 1;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = (u_char *) NGINX_VERSION;
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_hostname(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
v->len = ngx_cycle->hostname.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = ngx_cycle->hostname.data;
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_pid(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
u_char *p;
p = ngx_pnalloc(s->connection->pool, NGX_INT64_LEN);
if (p == NULL) {
return NGX_ERROR;
}
v->len = ngx_sprintf(p, "%P", ngx_pid) - p;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_msec(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
u_char *p;
ngx_time_t *tp;
p = ngx_pnalloc(s->connection->pool, NGX_TIME_T_LEN + 4);
if (p == NULL) {
return NGX_ERROR;
}
tp = ngx_timeofday();
v->len = ngx_sprintf(p, "%T.%03M", tp->sec, tp->msec) - p;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_time_iso8601(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
u_char *p;
p = ngx_pnalloc(s->connection->pool, ngx_cached_http_log_iso8601.len);
if (p == NULL) {
return NGX_ERROR;
}
ngx_memcpy(p, ngx_cached_http_log_iso8601.data,
ngx_cached_http_log_iso8601.len);
v->len = ngx_cached_http_log_iso8601.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_time_local(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
u_char *p;
p = ngx_pnalloc(s->connection->pool, ngx_cached_http_log_time.len);
if (p == NULL) {
return NGX_ERROR;
}
ngx_memcpy(p, ngx_cached_http_log_time.data, ngx_cached_http_log_time.len);
v->len = ngx_cached_http_log_time.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
static ngx_int_t
ngx_stream_variable_protocol(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
v->len = 3;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = (u_char *) (s->connection->type == SOCK_DGRAM ? "UDP" : "TCP");
return NGX_OK;
}
void *
ngx_stream_map_find(ngx_stream_session_t *s, ngx_stream_map_t *map,
ngx_str_t *match)
{
void *value;
u_char *low;
size_t len;
ngx_uint_t key;
len = match->len;
if (len) {
low = ngx_pnalloc(s->connection->pool, len);
if (low == NULL) {
return NULL;
}
} else {
low = NULL;
}
key = ngx_hash_strlow(low, match->data, len);
value = ngx_hash_find_combined(&map->hash, key, low, len);
if (value) {
return value;
}
#if (NGX_PCRE)
if (len && map->nregex) {
ngx_int_t n;
ngx_uint_t i;
ngx_stream_map_regex_t *reg;
reg = map->regex;
for (i = 0; i < map->nregex; i++) {
n = ngx_stream_regex_exec(s, reg[i].regex, match);
if (n == NGX_OK) {
return reg[i].value;
}
if (n == NGX_DECLINED) {
continue;
}
/* NGX_ERROR */
return NULL;
}
}
#endif
return NULL;
}
#if (NGX_PCRE)
static ngx_int_t
ngx_stream_variable_not_found(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
v->not_found = 1;
return NGX_OK;
}
ngx_stream_regex_t *
ngx_stream_regex_compile(ngx_conf_t *cf, ngx_regex_compile_t *rc)
{
u_char *p;
size_t size;
ngx_str_t name;
ngx_uint_t i, n;
ngx_stream_variable_t *v;
ngx_stream_regex_t *re;
ngx_stream_regex_variable_t *rv;
ngx_stream_core_main_conf_t *cmcf;
rc->pool = cf->pool;
if (ngx_regex_compile(rc) != NGX_OK) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%V", &rc->err);
return NULL;
}
re = ngx_pcalloc(cf->pool, sizeof(ngx_stream_regex_t));
if (re == NULL) {
return NULL;
}
re->regex = rc->regex;
re->ncaptures = rc->captures;
re->name = rc->pattern;
cmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_core_module);
cmcf->ncaptures = ngx_max(cmcf->ncaptures, re->ncaptures);
n = (ngx_uint_t) rc->named_captures;
if (n == 0) {
return re;
}
rv = ngx_palloc(rc->pool, n * sizeof(ngx_stream_regex_variable_t));
if (rv == NULL) {
return NULL;
}
re->variables = rv;
re->nvariables = n;
size = rc->name_size;
p = rc->names;
for (i = 0; i < n; i++) {
rv[i].capture = 2 * ((p[0] << 8) + p[1]);
name.data = &p[2];
name.len = ngx_strlen(name.data);
v = ngx_stream_add_variable(cf, &name, NGX_STREAM_VAR_CHANGEABLE);
if (v == NULL) {
return NULL;
}
rv[i].index = ngx_stream_get_variable_index(cf, &name);
if (rv[i].index == NGX_ERROR) {
return NULL;
}
v->get_handler = ngx_stream_variable_not_found;
p += size;
}
return re;
}
ngx_int_t
ngx_stream_regex_exec(ngx_stream_session_t *s, ngx_stream_regex_t *re,
ngx_str_t *str)
{
ngx_int_t rc, index;
ngx_uint_t i, n, len;
ngx_stream_variable_value_t *vv;
ngx_stream_core_main_conf_t *cmcf;
cmcf = ngx_stream_get_module_main_conf(s, ngx_stream_core_module);
if (re->ncaptures) {
len = cmcf->ncaptures;
if (s->captures == NULL) {
s->captures = ngx_palloc(s->connection->pool, len * sizeof(int));
if (s->captures == NULL) {
return NGX_ERROR;
}
}
} else {
len = 0;
}
rc = ngx_regex_exec(re->regex, str, s->captures, len);
if (rc == NGX_REGEX_NO_MATCHED) {
return NGX_DECLINED;
}
if (rc < 0) {
ngx_log_error(NGX_LOG_ALERT, s->connection->log, 0,
ngx_regex_exec_n " failed: %i on \"%V\" using \"%V\"",
rc, str, &re->name);
return NGX_ERROR;
}
for (i = 0; i < re->nvariables; i++) {
n = re->variables[i].capture;
index = re->variables[i].index;
vv = &s->variables[index];
vv->len = s->captures[n + 1] - s->captures[n];
vv->valid = 1;
vv->no_cacheable = 0;
vv->not_found = 0;
vv->data = &str->data[s->captures[n]];
#if (NGX_DEBUG)
{
ngx_stream_variable_t *v;
v = cmcf->variables.elts;
ngx_log_debug2(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream regex set $%V to \"%v\"", &v[index].name, vv);
}
#endif
}
s->ncaptures = rc * 2;
s->captures_data = str->data;
return NGX_OK;
}
#endif
ngx_int_t
ngx_stream_variables_add_core_vars(ngx_conf_t *cf)
{
ngx_stream_variable_t *cv, *v;
ngx_stream_core_main_conf_t *cmcf;
cmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_core_module);
cmcf->variables_keys = ngx_pcalloc(cf->temp_pool,
sizeof(ngx_hash_keys_arrays_t));
if (cmcf->variables_keys == NULL) {
return NGX_ERROR;
}
cmcf->variables_keys->pool = cf->pool;
cmcf->variables_keys->temp_pool = cf->pool;
if (ngx_hash_keys_array_init(cmcf->variables_keys, NGX_HASH_SMALL)
!= NGX_OK)
{
return NGX_ERROR;
}
if (ngx_array_init(&cmcf->prefix_variables, cf->pool, 8,
sizeof(ngx_stream_variable_t))
!= NGX_OK)
{
return NGX_ERROR;
}
for (cv = ngx_stream_core_variables; cv->name.len; cv++) {
v = ngx_stream_add_variable(cf, &cv->name, cv->flags);
if (v == NULL) {
return NGX_ERROR;
}
*v = *cv;
}
return NGX_OK;
}
ngx_int_t
ngx_stream_variables_init_vars(ngx_conf_t *cf)
{
size_t len;
ngx_uint_t i, n;
ngx_hash_key_t *key;
ngx_hash_init_t hash;
ngx_stream_variable_t *v, *av, *pv;
ngx_stream_core_main_conf_t *cmcf;
/* set the handlers for the indexed stream variables */
cmcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_core_module);
v = cmcf->variables.elts;
pv = cmcf->prefix_variables.elts;
key = cmcf->variables_keys->keys.elts;
for (i = 0; i < cmcf->variables.nelts; i++) {
for (n = 0; n < cmcf->variables_keys->keys.nelts; n++) {
av = key[n].value;
if (v[i].name.len == key[n].key.len
&& ngx_strncmp(v[i].name.data, key[n].key.data, v[i].name.len)
== 0)
{
v[i].get_handler = av->get_handler;
v[i].data = av->data;
av->flags |= NGX_STREAM_VAR_INDEXED;
v[i].flags = av->flags;
av->index = i;
if (av->get_handler == NULL
|| (av->flags & NGX_STREAM_VAR_WEAK))
{
break;
}
goto next;
}
}
len = 0;
av = NULL;
for (n = 0; n < cmcf->prefix_variables.nelts; n++) {
if (v[i].name.len >= pv[n].name.len && v[i].name.len > len
&& ngx_strncmp(v[i].name.data, pv[n].name.data, pv[n].name.len)
== 0)
{
av = &pv[n];
len = pv[n].name.len;
}
}
if (av) {
v[i].get_handler = av->get_handler;
v[i].data = (uintptr_t) &v[i].name;
v[i].flags = av->flags;
goto next;
}
if (v[i].get_handler == NULL) {
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"unknown \"%V\" variable", &v[i].name);
return NGX_ERROR;
}
next:
continue;
}
for (n = 0; n < cmcf->variables_keys->keys.nelts; n++) {
av = key[n].value;
if (av->flags & NGX_STREAM_VAR_NOHASH) {
key[n].key.data = NULL;
}
}
hash.hash = &cmcf->variables_hash;
hash.key = ngx_hash_key;
hash.max_size = cmcf->variables_hash_max_size;
hash.bucket_size = cmcf->variables_hash_bucket_size;
hash.name = "variables_hash";
hash.pool = cf->pool;
hash.temp_pool = NULL;
if (ngx_hash_init(&hash, cmcf->variables_keys->keys.elts,
cmcf->variables_keys->keys.nelts)
!= NGX_OK)
{
return NGX_ERROR;
}
cmcf->variables_keys = NULL;
return NGX_OK;
}
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