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/*
* Copyright (C) Yichun Zhang (agentzh)
*/
#ifndef DDEBUG
#define DDEBUG 0
#endif
#include "ddebug.h"
#include "ngx_http_lua_util.h"
#include "ngx_http_lua_ssl.h"
#include "ngx_http_lua_ctx.h"
typedef struct {
int ref;
lua_State *vm;
} ngx_http_lua_ngx_ctx_cleanup_data_t;
static ngx_int_t ngx_http_lua_ngx_ctx_add_cleanup(ngx_http_request_t *r,
ngx_pool_t *pool, int ref);
static void ngx_http_lua_ngx_ctx_cleanup(void *data);
int
ngx_http_lua_ngx_set_ctx_helper(lua_State *L, ngx_http_request_t *r,
ngx_http_lua_ctx_t *ctx, int index)
{
ngx_pool_t *pool;
if (index < 0) {
index = lua_gettop(L) + index + 1;
}
if (ctx->ctx_ref == LUA_NOREF) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"lua create ngx.ctx table for the current request");
lua_pushliteral(L, ngx_http_lua_ctx_tables_key);
lua_rawget(L, LUA_REGISTRYINDEX);
lua_pushvalue(L, index);
ctx->ctx_ref = luaL_ref(L, -2);
lua_pop(L, 1);
pool = r->pool;
if (ngx_http_lua_ngx_ctx_add_cleanup(r, pool, ctx->ctx_ref) != NGX_OK) {
return luaL_error(L, "no memory");
}
return 0;
}
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"lua fetching existing ngx.ctx table for the current "
"request");
lua_pushliteral(L, ngx_http_lua_ctx_tables_key);
lua_rawget(L, LUA_REGISTRYINDEX);
luaL_unref(L, -1, ctx->ctx_ref);
lua_pushvalue(L, index);
ctx->ctx_ref = luaL_ref(L, -2);
lua_pop(L, 1);
return 0;
}
int
ngx_http_lua_ffi_get_ctx_ref(ngx_http_request_t *r, int *in_ssl_phase,
int *ssl_ctx_ref)
{
ngx_http_lua_ctx_t *ctx;
#if (NGX_HTTP_SSL)
ngx_http_lua_ssl_ctx_t *ssl_ctx;
#endif
ctx = ngx_http_get_module_ctx(r, ngx_http_lua_module);
if (ctx == NULL) {
return NGX_HTTP_LUA_FFI_NO_REQ_CTX;
}
if (ctx->ctx_ref >= 0 || in_ssl_phase == NULL) {
return ctx->ctx_ref;
}
*in_ssl_phase = ctx->context & (NGX_HTTP_LUA_CONTEXT_SSL_CERT
| NGX_HTTP_LUA_CONTEXT_SSL_CLIENT_HELLO
| NGX_HTTP_LUA_CONTEXT_SSL_SESS_FETCH
| NGX_HTTP_LUA_CONTEXT_SSL_SESS_STORE);
*ssl_ctx_ref = LUA_NOREF;
#if (NGX_HTTP_SSL)
if (r->connection->ssl != NULL) {
ssl_ctx = ngx_http_lua_ssl_get_ctx(r->connection->ssl->connection);
if (ssl_ctx != NULL) {
*ssl_ctx_ref = ssl_ctx->ctx_ref;
}
}
#endif
return LUA_NOREF;
}
int
ngx_http_lua_ffi_set_ctx_ref(ngx_http_request_t *r, int ref)
{
ngx_pool_t *pool;
ngx_http_lua_ctx_t *ctx;
#if (NGX_HTTP_SSL)
ngx_connection_t *c;
ngx_http_lua_ssl_ctx_t *ssl_ctx;
#endif
ctx = ngx_http_get_module_ctx(r, ngx_http_lua_module);
if (ctx == NULL) {
return NGX_HTTP_LUA_FFI_NO_REQ_CTX;
}
#if (NGX_HTTP_SSL)
if (ctx->context & (NGX_HTTP_LUA_CONTEXT_SSL_CERT
| NGX_HTTP_LUA_CONTEXT_SSL_CLIENT_HELLO
| NGX_HTTP_LUA_CONTEXT_SSL_SESS_FETCH
| NGX_HTTP_LUA_CONTEXT_SSL_SESS_STORE))
{
ssl_ctx = ngx_http_lua_ssl_get_ctx(r->connection->ssl->connection);
if (ssl_ctx == NULL) {
return NGX_ERROR;
}
ssl_ctx->ctx_ref = ref;
c = ngx_ssl_get_connection(r->connection->ssl->connection);
pool = c->pool;
} else {
pool = r->pool;
}
#else
pool = r->pool;
#endif
ctx->ctx_ref = ref;
if (ngx_http_lua_ngx_ctx_add_cleanup(r, pool, ref) != NGX_OK) {
return NGX_ERROR;
}
return NGX_OK;
}
static ngx_int_t
ngx_http_lua_ngx_ctx_add_cleanup(ngx_http_request_t *r, ngx_pool_t *pool,
int ref)
{
lua_State *L;
ngx_pool_cleanup_t *cln;
ngx_http_lua_ctx_t *ctx;
ngx_http_lua_ngx_ctx_cleanup_data_t *data;
ctx = ngx_http_get_module_ctx(r, ngx_http_lua_module);
L = ngx_http_lua_get_lua_vm(r, ctx);
cln = ngx_pool_cleanup_add(pool,
sizeof(ngx_http_lua_ngx_ctx_cleanup_data_t));
if (cln == NULL) {
return NGX_ERROR;
}
cln->handler = ngx_http_lua_ngx_ctx_cleanup;
data = cln->data;
data->vm = L;
data->ref = ref;
return NGX_OK;
}
static void
ngx_http_lua_ngx_ctx_cleanup(void *data)
{
lua_State *L;
ngx_http_lua_ngx_ctx_cleanup_data_t *clndata = data;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
"lua release ngx.ctx at ref %d", clndata->ref);
L = clndata->vm;
lua_pushliteral(L, ngx_http_lua_ctx_tables_key);
lua_rawget(L, LUA_REGISTRYINDEX);
luaL_unref(L, -1, clndata->ref);
lua_pop(L, 1);
}
/* vi:set ft=c ts=4 sw=4 et fdm=marker: */
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