static int
ngx_stream_lua_socket_udp(lua_State *L)
{
ngx_stream_session_t *s;
ngx_stream_lua_ctx_t *ctx;
if (lua_gettop(L) != 0) {
return luaL_error(L, "expecting zero arguments, but got %d",
lua_gettop(L));
}
s = ngx_stream_lua_get_session(L);
if (s == NULL) {
return luaL_error(L, "no session found");
}
ctx = ngx_stream_get_module_ctx(s, ngx_stream_lua_module);
if (ctx == NULL) {
return luaL_error(L, "no ctx found");
}
ngx_stream_lua_check_context(L, ctx, NGX_STREAM_LUA_CONTEXT_CONTENT
| NGX_STREAM_LUA_CONTEXT_TIMER);
lua_createtable(L, 3 /* narr */, 1 /* nrec */);
lua_pushlightuserdata(L, &ngx_stream_lua_socket_udp_metatable_key);
lua_rawget(L, LUA_REGISTRYINDEX);
lua_setmetatable(L, -2);
dd("top: %d", lua_gettop(L));
return 1;
}
/**
* Send last_buf, terminate output stream
* */
static int
ngx_stream_lua_ngx_eof(lua_State *L)
{
#if 0
/* TODO */
ngx_stream_session_t *s;
ngx_stream_lua_ctx_t *ctx;
ngx_int_t rc;
s = ngx_stream_lua_get_session(L);
if (s == NULL) {
return luaL_error(L, "no session object found");
}
if (lua_gettop(L) != 0) {
return luaL_error(L, "no argument is expected");
}
ctx = ngx_stream_get_module_ctx(s, ngx_stream_lua_module);
if (ctx == NULL) {
return luaL_error(L, "no ctx found");
}
if (ctx->acquired_raw_req_socket) {
lua_pushnil(L);
lua_pushliteral(L, "raw session socket acquired");
return 2;
}
if (ctx->eof) {
lua_pushnil(L);
lua_pushliteral(L, "seen eof");
return 2;
}
ngx_stream_lua_check_context(L, ctx, NGX_STREAM_LUA_CONTEXT_CONTENT);
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream lua send eof");
rc = ngx_stream_lua_send_chain_link(s, ctx, NULL /* indicate last_buf */);
dd("send chain: %d", (int) rc);
if (rc == NGX_ERROR || rc >= NGX_STREAM_SPECIAL_RESPONSE) {
lua_pushnil(L);
lua_pushliteral(L, "nginx output filter error");
return 2;
}
#endif
lua_pushinteger(L, 1);
return 1;
}
static int
ngx_stream_lua_coroutine_yield(lua_State *L)
{
ngx_stream_session_t *s;
ngx_stream_lua_ctx_t *ctx;
ngx_stream_lua_co_ctx_t *coctx;
s = ngx_stream_lua_get_session(L);
if (s == NULL) {
return luaL_error(L, "no session found");
}
ctx = ngx_stream_get_module_ctx(s, ngx_stream_lua_module);
if (ctx == NULL) {
return luaL_error(L, "no session ctx found");
}
ngx_stream_lua_check_context(L, ctx, NGX_STREAM_LUA_CONTEXT_CONTENT
| NGX_STREAM_LUA_CONTEXT_TIMER);
coctx = ctx->cur_co_ctx;
coctx->co_status = NGX_STREAM_LUA_CO_SUSPENDED;
ctx->co_op = NGX_STREAM_LUA_USER_CORO_YIELD;
if (!coctx->is_uthread && coctx->parent_co_ctx) {
dd("set coroutine to running");
coctx->parent_co_ctx->co_status = NGX_STREAM_LUA_CO_RUNNING;
#if 0
/* TODO */
ngx_stream_lua_probe_user_coroutine_yield(s,
coctx->parent_co_ctx->co,
L);
#endif
} else {
#if 0
/* TODO */
ngx_stream_lua_probe_user_coroutine_yield(s, NULL, L);
#endif
}
/* yield and pass retvals to main thread,
* and resume parent coroutine there */
return lua_yield(L, lua_gettop(L));
}
/**
* Send last_buf, terminate output stream
* */
static int
ngx_stream_lua_ngx_eof(lua_State *L)
{
ngx_stream_session_t *s;
ngx_stream_lua_ctx_t *ctx;
s = ngx_stream_lua_get_session(L);
if (s == NULL) {
return luaL_error(L, "no session object found");
}
if (lua_gettop(L) != 0) {
return luaL_error(L, "no argument is expected");
}
ctx = ngx_stream_get_module_ctx(s, ngx_stream_lua_module);
if (ctx == NULL) {
return luaL_error(L, "no ctx found");
}
#if 0
if (ctx->acquired_raw_req_socket) {
lua_pushnil(L);
lua_pushliteral(L, "raw session socket acquired");
return 2;
}
#endif
if (ctx->eof) {
lua_pushnil(L);
lua_pushliteral(L, "seen eof");
return 2;
}
ctx->eof = 1;
ngx_stream_lua_check_context(L, ctx, NGX_STREAM_LUA_CONTEXT_CONTENT);
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream lua send eof");
lua_pushinteger(L, 1);
return 1;
}
static int
ngx_stream_lua_coroutine_status(lua_State *L)
{
lua_State *co; /* new coroutine to be created */
const ngx_str_t *names;
ngx_stream_session_t *s;
ngx_stream_lua_ctx_t *ctx;
ngx_stream_lua_co_ctx_t *coctx; /* co ctx for the new coroutine */
co = lua_tothread(L, 1);
luaL_argcheck(L, co, 1, "coroutine expected");
s = ngx_stream_lua_get_session(L);
if (s == NULL) {
return luaL_error(L, "no session found");
}
ctx = ngx_stream_get_module_ctx(s, ngx_stream_lua_module);
if (ctx == NULL) {
return luaL_error(L, "no session ctx found");
}
ngx_stream_lua_check_context(L, ctx, NGX_STREAM_LUA_CONTEXT_CONTENT
| NGX_STREAM_LUA_CONTEXT_TIMER);
names = ngx_stream_lua_co_status_names;
coctx = ngx_stream_lua_get_co_ctx(co, ctx);
if (coctx == NULL) {
lua_pushlstring(L, (const char *) names[NGX_STREAM_LUA_CO_DEAD].data,
names[NGX_STREAM_LUA_CO_DEAD].len);
return 1;
}
dd("co status: %d", coctx->co_status);
lua_pushlstring(L, (const char *) names[coctx->co_status].data,
names[coctx->co_status].len);
return 1;
}
static int
ngx_stream_lua_ngx_exit(lua_State *L)
{
ngx_int_t rc;
ngx_stream_session_t *s;
ngx_stream_lua_ctx_t *ctx;
if (lua_gettop(L) != 1) {
return luaL_error(L, "expecting one argument");
}
s = ngx_stream_lua_get_session(L);
if (s == NULL) {
return luaL_error(L, "no session object found");
}
ctx = ngx_stream_get_module_ctx(s, ngx_stream_lua_module);
if (ctx == NULL) {
return luaL_error(L, "no session ctx found");
}
ngx_stream_lua_check_context(L, ctx, NGX_STREAM_LUA_CONTEXT_CONTENT
| NGX_STREAM_LUA_CONTEXT_TIMER);
rc = (ngx_int_t) luaL_checkinteger(L, 1);
dd("setting exit code: %d", (int) rc);
ctx->exit_code = rc;
ctx->exited = 1;
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream lua exit with code %i", ctx->exit_code);
dd("calling yield");
return lua_yield(L, 0);
}
/**
* Force flush out response content
* */
static int
ngx_stream_lua_ngx_flush(lua_State *L)
{
#if 0
/* TODO */
ngx_stream_session_t *s;
ngx_stream_lua_ctx_t *ctx;
ngx_chain_t *cl;
ngx_int_t rc;
int n;
unsigned wait = 0;
ngx_event_t *wev;
ngx_stream_core_loc_conf_t *clcf;
ngx_stream_lua_co_ctx_t *coctx;
n = lua_gettop(L);
if (n > 1) {
return luaL_error(L, "attempt to pass %d arguments, but accepted 0 "
"or 1", n);
}
s = ngx_stream_lua_get_session(L);
if (n == 1 && s == s->main) {
luaL_checktype(L, 1, LUA_TBOOLEAN);
wait = lua_toboolean(L, 1);
}
ctx = ngx_stream_get_module_ctx(s, ngx_stream_lua_module);
if (ctx == NULL) {
return luaL_error(L, "no session ctx found");
}
ngx_stream_lua_check_context(L, ctx, NGX_STREAM_LUA_CONTEXT_REWRITE
| NGX_STREAM_LUA_CONTEXT_ACCESS
| NGX_STREAM_LUA_CONTEXT_CONTENT);
if (ctx->acquired_raw_req_socket) {
lua_pushnil(L);
lua_pushliteral(L, "raw session socket acquired");
return 2;
}
coctx = ctx->cur_co_ctx;
if (coctx == NULL) {
return luaL_error(L, "no co ctx found");
}
if (ctx->eof) {
lua_pushnil(L);
lua_pushliteral(L, "seen eof");
return 2;
}
#if 1
if (!s->header_sent && !ctx->header_sent) {
lua_pushnil(L);
lua_pushliteral(L, "nothing to flush");
return 2;
}
#endif
cl = ngx_stream_lua_get_flush_chain(s, ctx);
if (cl == NULL) {
return luaL_error(L, "no memory");
}
rc = ngx_stream_lua_send_chain_link(s, ctx, cl);
dd("send chain: %d", (int) rc);
if (rc == NGX_ERROR || rc >= NGX_STREAM_SPECIAL_RESPONSE) {
lua_pushnil(L);
lua_pushliteral(L, "nginx output filter error");
return 2;
}
dd("wait:%d, rc:%d, buffered:0x%x", wait, (int) rc,
s->connection->buffered);
wev = s->connection->write;
if (wait && (s->connection->buffered & NGX_STREAM_LOWLEVEL_BUFFERED
|| wev->delayed))
{
ngx_log_debug2(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream lua flush requires waiting: buffered 0x%uxd, "
"delayed:%d", (unsigned) s->connection->buffered,
wev->delayed);
coctx->flushing = 1;
ctx->flushing_coros++;
if (ctx->entered_content_phase) {
/* mimic ngx_stream_set_write_handler */
s->write_event_handler = ngx_stream_lua_content_wev_handler;
} else {
s->write_event_handler = ngx_stream_core_run_phases;
}
clcf = ngx_stream_get_module_loc_conf(s, ngx_stream_core_module);
if (!wev->delayed) {
ngx_add_timer(wev, clcf->send_timeout);
}
if (ngx_handle_write_event(wev, clcf->send_lowat) != NGX_OK) {
if (wev->timer_set) {
wev->delayed = 0;
ngx_del_timer(wev);
}
lua_pushnil(L);
lua_pushliteral(L, "connection broken");
return 2;
}
ngx_stream_lua_cleanup_pending_operation(ctx->cur_co_ctx);
coctx->cleanup = ngx_stream_lua_flush_cleanup;
coctx->data = s;
return lua_yield(L, 0);
}
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream lua flush asynchronously");
#endif
lua_pushinteger(L, 1);
return 1;
}
static int
ngx_stream_lua_ngx_echo(lua_State *L, unsigned newline)
{
ngx_stream_session_t *s;
ngx_stream_lua_ctx_t *ctx;
const char *p;
size_t len;
size_t size;
ngx_buf_t *b;
ngx_chain_t *cl;
ngx_int_t rc;
int i;
int nargs;
int type;
const char *msg;
s = ngx_stream_lua_get_session(L);
if (s == NULL) {
return luaL_error(L, "no session object found");
}
ctx = ngx_stream_get_module_ctx(s, ngx_stream_lua_module);
if (ctx == NULL) {
return luaL_error(L, "no session ctx found");
}
ngx_stream_lua_check_context(L, ctx, NGX_STREAM_LUA_CONTEXT_CONTENT);
if (ctx->acquired_raw_req_socket) {
lua_pushnil(L);
lua_pushliteral(L, "raw session socket acquired");
return 2;
}
if (ctx->eof) {
lua_pushnil(L);
lua_pushliteral(L, "seen eof");
return 2;
}
nargs = lua_gettop(L);
size = 0;
for (i = 1; i <= nargs; i++) {
type = lua_type(L, i);
switch (type) {
case LUA_TNUMBER:
case LUA_TSTRING:
lua_tolstring(L, i, &len);
size += len;
break;
case LUA_TNIL:
size += sizeof("nil") - 1;
break;
case LUA_TBOOLEAN:
if (lua_toboolean(L, i)) {
size += sizeof("true") - 1;
} else {
size += sizeof("false") - 1;
}
break;
case LUA_TTABLE:
size += ngx_stream_lua_calc_strlen_in_table(L, i, i,
0 /* strict */);
break;
case LUA_TLIGHTUSERDATA:
dd("userdata: %p", lua_touserdata(L, i));
if (lua_touserdata(L, i) == NULL) {
size += sizeof("null") - 1;
break;
}
continue;
default:
msg = lua_pushfstring(L, "string, number, boolean, nil, "
"ngx.null, or array table expected, "
"but got %s", lua_typename(L, type));
return luaL_argerror(L, i, msg);
}
}
if (newline) {
size += sizeof("\n") - 1;
}
if (size == 0) {
/* do nothing for empty strings */
lua_pushinteger(L, 1);
return 1;
}
cl = ngx_stream_lua_chain_get_free_buf(s->connection->log,
s->connection->pool,
&ctx->free_bufs, size);
if (cl == NULL) {
return luaL_error(L, "no memory");
}
b = cl->buf;
for (i = 1; i <= nargs; i++) {
type = lua_type(L, i);
switch (type) {
case LUA_TNUMBER:
case LUA_TSTRING:
p = lua_tolstring(L, i, &len);
b->last = ngx_copy(b->last, (u_char *) p, len);
break;
case LUA_TNIL:
*b->last++ = 'n';
*b->last++ = 'i';
*b->last++ = 'l';
break;
case LUA_TBOOLEAN:
if (lua_toboolean(L, i)) {
*b->last++ = 't';
*b->last++ = 'r';
*b->last++ = 'u';
*b->last++ = 'e';
} else {
*b->last++ = 'f';
*b->last++ = 'a';
*b->last++ = 'l';
*b->last++ = 's';
*b->last++ = 'e';
}
break;
case LUA_TTABLE:
b->last = ngx_stream_lua_copy_str_in_table(L, i, b->last);
break;
case LUA_TLIGHTUSERDATA:
*b->last++ = 'n';
*b->last++ = 'u';
*b->last++ = 'l';
*b->last++ = 'l';
break;
default:
return luaL_error(L, "impossible to reach here");
}
}
if (newline) {
*b->last++ = '\n';
}
#if 0
if (b->last != b->end) {
return luaL_error(L, "buffer error: %p != %p", b->last, b->end);
}
#endif
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
newline ? "stream lua say response"
: "stream lua print response");
rc = ngx_stream_lua_send_chain_link(s, ctx, cl);
if (rc == NGX_ERROR) {
lua_pushnil(L);
lua_pushliteral(L, "nginx output filter error");
return 2;
}
dd("downstream write: %d, buf len: %d", (int) rc,
(int) (b->last - b->pos));
lua_pushinteger(L, 1);
return 1;
}
int
ngx_stream_lua_coroutine_create_helper(lua_State *L, ngx_stream_session_t *s,
ngx_stream_lua_ctx_t *ctx, ngx_stream_lua_co_ctx_t **pcoctx)
{
lua_State *vm; /* the Lua VM */
lua_State *co; /* new coroutine to be created */
ngx_stream_lua_co_ctx_t *coctx; /* co ctx for the new coroutine */
luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), 1,
"Lua function expected");
ngx_stream_lua_check_context(L, ctx, NGX_STREAM_LUA_CONTEXT_CONTENT
| NGX_STREAM_LUA_CONTEXT_TIMER);
vm = ngx_stream_lua_get_lua_vm(s, ctx);
/* create new coroutine on root Lua state, so it always yields
* to main Lua thread
*/
co = lua_newthread(vm);
#if 0
/* TODO */
ngx_stream_lua_probe_user_coroutine_create(s, L, co);
#endif
coctx = ngx_stream_lua_get_co_ctx(co, ctx);
if (coctx == NULL) {
coctx = ngx_stream_lua_create_co_ctx(s, ctx);
if (coctx == NULL) {
return luaL_error(L, "no memory");
}
} else {
ngx_memzero(coctx, sizeof(ngx_stream_lua_co_ctx_t));
coctx->co_ref = LUA_NOREF;
}
coctx->co = co;
coctx->co_status = NGX_STREAM_LUA_CO_SUSPENDED;
/* make new coroutine share globals of the parent coroutine.
* NOTE: globals don't have to be separated! */
ngx_stream_lua_get_globals_table(L);
lua_xmove(L, co, 1);
ngx_stream_lua_set_globals_table(co);
lua_xmove(vm, L, 1); /* move coroutine from main thread to L */
lua_pushvalue(L, 1); /* copy entry function to top of L*/
lua_xmove(L, co, 1); /* move entry function from L to co */
if (pcoctx) {
*pcoctx = coctx;
}
#ifdef NGX_LUA_USE_ASSERT
coctx->co_top = 1;
#endif
return 1; /* return new coroutine to Lua */
}
static int
ngx_stream_lua_coroutine_resume(lua_State *L)
{
lua_State *co;
ngx_stream_session_t *s;
ngx_stream_lua_ctx_t *ctx;
ngx_stream_lua_co_ctx_t *coctx;
ngx_stream_lua_co_ctx_t *p_coctx; /* parent co ctx */
co = lua_tothread(L, 1);
luaL_argcheck(L, co, 1, "coroutine expected");
s = ngx_stream_lua_get_session(L);
if (s == NULL) {
return luaL_error(L, "no session found");
}
ctx = ngx_stream_get_module_ctx(s, ngx_stream_lua_module);
if (ctx == NULL) {
return luaL_error(L, "no session ctx found");
}
ngx_stream_lua_check_context(L, ctx, NGX_STREAM_LUA_CONTEXT_CONTENT
| NGX_STREAM_LUA_CONTEXT_TIMER);
p_coctx = ctx->cur_co_ctx;
if (p_coctx == NULL) {
return luaL_error(L, "no parent co ctx found");
}
coctx = ngx_stream_lua_get_co_ctx(co, ctx);
if (coctx == NULL) {
return luaL_error(L, "no co ctx found");
}
#if 0
/* TODO */
ngx_stream_lua_probe_user_coroutine_resume(s, L, co);
#endif
if (coctx->co_status != NGX_STREAM_LUA_CO_SUSPENDED) {
dd("coroutine resume: %d", coctx->co_status);
lua_pushboolean(L, 0);
lua_pushfstring(L, "cannot resume %s coroutine",
ngx_stream_lua_co_status_names[coctx->co_status].data);
return 2;
}
p_coctx->co_status = NGX_STREAM_LUA_CO_NORMAL;
coctx->parent_co_ctx = p_coctx;
dd("set coroutine to running");
coctx->co_status = NGX_STREAM_LUA_CO_RUNNING;
ctx->co_op = NGX_STREAM_LUA_USER_CORO_RESUME;
ctx->cur_co_ctx = coctx;
/* yield and pass args to main thread, and resume target coroutine from
* there */
return lua_yield(L, lua_gettop(L) - 1);
}
static int
ngx_stream_lua_socket_udp_setpeername(lua_State *L)
{
ngx_stream_session_t *s;
ngx_stream_lua_ctx_t *ctx;
ngx_str_t host;
int port;
ngx_resolver_ctx_t *rctx, temp;
int saved_top;
int n;
u_char *p;
size_t len;
ngx_url_t url;
ngx_int_t rc;
ngx_stream_lua_srv_conf_t *lscf;
ngx_udp_connection_t *uc;
int timeout;
ngx_stream_lua_co_ctx_t *coctx;
ngx_stream_lua_socket_udp_upstream_t *u;
/*
* TODO: we should probably accept an extra argument to setpeername()
* to allow the user bind the datagram unix domain socket himself,
* which is necessary for systems without autobind support.
*/
n = lua_gettop(L);
if (n != 2 && n != 3) {
return luaL_error(L, "ngx.socket.udp setpeername: expecting 2 or 3 "
"arguments (including the object), but seen %d", n);
}
s = ngx_stream_lua_get_session(L);
if (s == NULL) {
return luaL_error(L, "no session found");
}
ctx = ngx_stream_get_module_ctx(s, ngx_stream_lua_module);
if (ctx == NULL) {
return luaL_error(L, "no ctx found");
}
ngx_stream_lua_check_context(L, ctx, NGX_STREAM_LUA_CONTEXT_CONTENT
| NGX_STREAM_LUA_CONTEXT_TIMER);
luaL_checktype(L, 1, LUA_TTABLE);
p = (u_char *) luaL_checklstring(L, 2, &len);
host.data = ngx_palloc(s->connection->pool, len + 1);
if (host.data == NULL) {
return luaL_error(L, "no memory");
}
host.len = len;
ngx_memcpy(host.data, p, len);
host.data[len] = '\0';
if (n == 3) {
port = luaL_checkinteger(L, 3);
if (port < 0 || port > 65536) {
lua_pushnil(L);
lua_pushfstring(L, "bad port number: %d", port);
return 2;
}
} else { /* n == 2 */
port = 0;
}
lua_rawgeti(L, 1, SOCKET_CTX_INDEX);
u = lua_touserdata(L, -1);
lua_pop(L, 1);
if (u) {
if (u->session && u->session != s) {
return luaL_error(L, "bad session");
}
if (u->waiting) {
lua_pushnil(L);
lua_pushliteral(L, "socket busy");
return 2;
}
if (u->udp_connection.connection) {
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream lua udp socket reconnect without "
"shutting down");
ngx_stream_lua_socket_udp_finalize(s, u);
}
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream lua reuse socket upstream ctx");
} else {
u = lua_newuserdata(L, sizeof(ngx_stream_lua_socket_udp_upstream_t));
if (u == NULL) {
return luaL_error(L, "no memory");
}
#if 1
lua_pushlightuserdata(L, &ngx_stream_lua_udp_udata_metatable_key);
lua_rawget(L, LUA_REGISTRYINDEX);
lua_setmetatable(L, -2);
#endif
lua_rawseti(L, 1, SOCKET_CTX_INDEX);
}
ngx_memzero(u, sizeof(ngx_stream_lua_socket_udp_upstream_t));
u->session = s; /* set the controlling session */
lscf = ngx_stream_get_module_srv_conf(s, ngx_stream_lua_module);
u->conf = lscf;
uc = &u->udp_connection;
uc->log = *s->connection->log;
dd("lua peer connection log: %p", &uc->log);
lua_rawgeti(L, 1, SOCKET_TIMEOUT_INDEX);
timeout = (ngx_int_t) lua_tointeger(L, -1);
lua_pop(L, 1);
if (timeout > 0) {
u->read_timeout = (ngx_msec_t) timeout;
} else {
u->read_timeout = u->conf->read_timeout;
}
ngx_memzero(&url, sizeof(ngx_url_t));
url.url.len = host.len;
url.url.data = host.data;
url.default_port = (in_port_t) port;
url.no_resolve = 1;
if (ngx_parse_url(s->connection->pool, &url) != NGX_OK) {
lua_pushnil(L);
if (url.err) {
lua_pushfstring(L, "failed to parse host name \"%s\": %s",
host.data, url.err);
} else {
lua_pushfstring(L, "failed to parse host name \"%s\"", host.data);
}
return 2;
}
u->resolved = ngx_pcalloc(s->connection->pool,
sizeof(ngx_stream_lua_resolved_t));
if (u->resolved == NULL) {
return luaL_error(L, "no memory");
}
if (url.addrs && url.addrs[0].sockaddr) {
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream lua udp socket network address given directly");
u->resolved->sockaddr = url.addrs[0].sockaddr;
u->resolved->socklen = url.addrs[0].socklen;
u->resolved->naddrs = 1;
u->resolved->host = url.addrs[0].name;
} else {
u->resolved->host = host;
u->resolved->port = (in_port_t) port;
}
if (u->resolved->sockaddr) {
rc = ngx_stream_lua_socket_resolve_retval_handler(s, u, L);
if (rc == NGX_AGAIN) {
return lua_yield(L, 0);
}
return rc;
}
temp.name = host;
rctx = ngx_resolve_start(lscf->resolver, &temp);
if (rctx == NULL) {
u->ft_type |= NGX_STREAM_LUA_SOCKET_FT_RESOLVER;
lua_pushnil(L);
lua_pushliteral(L, "failed to start the resolver");
return 2;
}
if (rctx == NGX_NO_RESOLVER) {
u->ft_type |= NGX_STREAM_LUA_SOCKET_FT_RESOLVER;
lua_pushnil(L);
lua_pushfstring(L, "no lua_resolver defined to resolve \"%s\"",
host.data);
return 2;
}
rctx->name = host;
#if !defined(nginx_version) || nginx_version < 1005008
rctx->type = NGX_RESOLVE_A;
#endif
rctx->handler = ngx_stream_lua_socket_resolve_handler;
rctx->data = u;
rctx->timeout = lscf->resolver_timeout;
u->co_ctx = ctx->cur_co_ctx;
u->resolved->ctx = rctx;
saved_top = lua_gettop(L);
coctx = ctx->cur_co_ctx;
ngx_stream_lua_cleanup_pending_operation(coctx);
coctx->cleanup = ngx_stream_lua_udp_resolve_cleanup;
if (ngx_resolve_name(rctx) != NGX_OK) {
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream lua udp socket fail to run resolver "
"immediately");
u->ft_type |= NGX_STREAM_LUA_SOCKET_FT_RESOLVER;
u->resolved->ctx = NULL;
lua_pushnil(L);
lua_pushfstring(L, "%s could not be resolved", host.data);
return 2;
}
if (u->waiting == 1) {
/* resolved and already connecting */
return lua_yield(L, 0);
}
n = lua_gettop(L) - saved_top;
if (n) {
/* errors occurred during resolving or connecting
* or already connected */
return n;
}
/* still resolving */
u->waiting = 1;
u->prepare_retvals = ngx_stream_lua_socket_resolve_retval_handler;
coctx->data = u;
ctx->write_event_handler = ngx_stream_lua_content_wev_handler;
return lua_yield(L, 0);
}
/**
* Force flush out response content
* */
static int
ngx_stream_lua_ngx_flush(lua_State *L)
{
ngx_stream_session_t *s;
ngx_stream_lua_ctx_t *ctx;
int n;
unsigned wait = 0;
ngx_event_t *wev;
ngx_stream_lua_srv_conf_t *lscf;
ngx_stream_lua_co_ctx_t *coctx;
n = lua_gettop(L);
if (n > 1) {
return luaL_error(L, "attempt to pass %d arguments, but accepted 0 "
"or 1", n);
}
s = ngx_stream_lua_get_session(L);
wait = 1; /* always wait */
ctx = ngx_stream_get_module_ctx(s, ngx_stream_lua_module);
if (ctx == NULL) {
return luaL_error(L, "no session ctx found");
}
ngx_stream_lua_check_context(L, ctx, NGX_STREAM_LUA_CONTEXT_CONTENT);
#if 0
if (ctx->acquired_raw_req_socket) {
lua_pushnil(L);
lua_pushliteral(L, "raw session socket acquired");
return 2;
}
#endif
coctx = ctx->cur_co_ctx;
if (coctx == NULL) {
return luaL_error(L, "no co ctx found");
}
if (ctx->eof) {
lua_pushnil(L);
lua_pushliteral(L, "seen eof");
return 2;
}
wev = s->connection->write;
if (wait && (ctx->downstream_busy_bufs || wev->delayed)) {
ngx_log_debug2(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream lua flush requires waiting: busy bufs %p, "
"delayed %d", ctx->downstream_busy_bufs, wev->delayed);
coctx->flushing = 1;
ctx->flushing_coros++;
/* mimic ngx_stream_set_write_handler */
ctx->write_event_handler = ngx_stream_lua_content_wev_handler;
lscf = ngx_stream_get_module_srv_conf(s, ngx_stream_lua_module);
if (!wev->delayed) {
ngx_add_timer(wev, lscf->send_timeout);
}
if (ngx_handle_write_event(wev, lscf->send_lowat) != NGX_OK) {
if (wev->timer_set) {
wev->delayed = 0;
ngx_del_timer(wev);
}
lua_pushnil(L);
lua_pushliteral(L, "connection broken");
return 2;
}
ngx_stream_lua_cleanup_pending_operation(ctx->cur_co_ctx);
coctx->cleanup = ngx_stream_lua_flush_cleanup;
coctx->data = s;
return lua_yield(L, 0);
}
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream lua flush asynchronously");
lua_pushinteger(L, 1);
return 1;
}
static int
ngx_stream_lua_uthread_kill(lua_State *L)
{
lua_State *sub_co;
ngx_stream_session_t *s;
ngx_stream_lua_ctx_t *ctx;
ngx_stream_lua_co_ctx_t *coctx, *sub_coctx;
s = ngx_stream_lua_get_session(L);
if (s == NULL) {
return luaL_error(L, "no session found");
}
ctx = ngx_stream_get_module_ctx(s, ngx_stream_lua_module);
if (ctx == NULL) {
return luaL_error(L, "no session ctx found");
}
ngx_stream_lua_check_context(L, ctx, NGX_STREAM_LUA_CONTEXT_CONTENT
| NGX_STREAM_LUA_CONTEXT_TIMER);
coctx = ctx->cur_co_ctx;
sub_co = lua_tothread(L, 1);
luaL_argcheck(L, sub_co, 1, "stream lua thread expected");
sub_coctx = ngx_stream_lua_get_co_ctx(sub_co, ctx);
if (sub_coctx == NULL) {
return luaL_error(L, "no co ctx found");
}
if (!sub_coctx->is_uthread) {
lua_pushnil(L);
lua_pushliteral(L, "not user thread");
return 2;
}
if (sub_coctx->parent_co_ctx != coctx) {
lua_pushnil(L);
lua_pushliteral(L, "killer not parent");
return 2;
}
switch (sub_coctx->co_status) {
case NGX_STREAM_LUA_CO_ZOMBIE:
ngx_stream_lua_del_thread(s, L, ctx, sub_coctx);
ctx->uthreads--;
lua_pushnil(L);
lua_pushliteral(L, "already terminated");
return 2;
case NGX_STREAM_LUA_CO_DEAD:
lua_pushnil(L);
lua_pushliteral(L, "already waited or killed");
return 2;
default:
ngx_stream_lua_cleanup_pending_operation(sub_coctx);
ngx_stream_lua_del_thread(s, L, ctx, sub_coctx);
ctx->uthreads--;
lua_pushinteger(L, 1);
return 1;
}
/* not reacheable */
}
static int
ngx_stream_lua_uthread_wait(lua_State *L)
{
int i, nargs, nrets;
lua_State *sub_co;
ngx_stream_session_t *s;
ngx_stream_lua_ctx_t *ctx;
ngx_stream_lua_co_ctx_t *coctx, *sub_coctx;
s = ngx_stream_lua_get_session(L);
if (s == NULL) {
return luaL_error(L, "no session found");
}
ctx = ngx_stream_get_module_ctx(s, ngx_stream_lua_module);
if (ctx == NULL) {
return luaL_error(L, "no session ctx found");
}
ngx_stream_lua_check_context(L, ctx, NGX_STREAM_LUA_CONTEXT_CONTENT
| NGX_STREAM_LUA_CONTEXT_TIMER);
coctx = ctx->cur_co_ctx;
nargs = lua_gettop(L);
for (i = 1; i <= nargs; i++) {
sub_co = lua_tothread(L, i);
luaL_argcheck(L, sub_co, i, "stream lua thread expected");
sub_coctx = ngx_stream_lua_get_co_ctx(sub_co, ctx);
if (sub_coctx == NULL) {
return luaL_error(L, "no co ctx found");
}
if (!sub_coctx->is_uthread) {
return luaL_error(L, "attempt to wait on a coroutine that is "
"not a user thread");
}
if (sub_coctx->parent_co_ctx != coctx) {
return luaL_error(L, "only the parent coroutine can wait on the "
"thread");
}
switch (sub_coctx->co_status) {
case NGX_STREAM_LUA_CO_ZOMBIE:
ngx_stream_lua_probe_info("found zombie child");
nrets = lua_gettop(sub_coctx->co);
dd("child retval count: %d, %s: %s", (int) nrets,
luaL_typename(sub_coctx->co, -1),
lua_tostring(sub_coctx->co, -1));
if (nrets) {
lua_xmove(sub_coctx->co, L, nrets);
}
#if 1
ngx_stream_lua_del_thread(s, L, ctx, sub_coctx);
ctx->uthreads--;
#endif
return nrets;
case NGX_STREAM_LUA_CO_DEAD:
dd("uthread already waited: %p (parent %p)", sub_coctx,
coctx);
if (i < nargs) {
/* just ignore it if it is not the last one */
continue;
}
/* being the last one */
lua_pushnil(L);
lua_pushliteral(L, "already waited or killed");
return 2;
default:
dd("uthread %p still alive, status: %d, parent %p", sub_coctx,
sub_coctx->co_status, coctx);
break;
}
#if 0
/* TODO */
ngx_stream_lua_probe_user_thread_wait(L, sub_coctx->co);
#endif
sub_coctx->waited_by_parent = 1;
}
return lua_yield(L, 0);
}
