/** * 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_socket_udp_receive(lua_State *L) { ngx_stream_session_t *s; ngx_stream_lua_socket_udp_upstream_t *u; ngx_int_t rc; ngx_stream_lua_ctx_t *ctx; ngx_stream_lua_co_ctx_t *coctx; size_t size; int nargs; ngx_stream_lua_srv_conf_t *lscf; nargs = lua_gettop(L); if (nargs != 1 && nargs != 2) { return luaL_error(L, "expecting 1 or 2 arguments " "(including the object), but got %d", nargs); } s = ngx_stream_lua_get_session(L); if (s == NULL) { return luaL_error(L, "no session found"); } ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0, "stream lua udp socket calling receive() method"); luaL_checktype(L, 1, LUA_TTABLE); lua_rawgeti(L, 1, SOCKET_CTX_INDEX); u = lua_touserdata(L, -1); lua_pop(L, 1); if (u == NULL || u->udp_connection.connection == NULL) { lscf = ngx_stream_get_module_srv_conf(s, ngx_stream_lua_module); if (lscf->log_socket_errors) { ngx_log_error(NGX_LOG_ERR, s->connection->log, 0, "attempt to receive data on a closed socket: u:%p, " "c:%p", u, u ? u->udp_connection.connection : NULL); } lua_pushnil(L); lua_pushliteral(L, "closed"); return 2; } if (u->session != s) { return luaL_error(L, "bad session"); } if (u->ft_type) { u->ft_type = 0; } #if 1 if (u->waiting) { lua_pushnil(L); lua_pushliteral(L, "socket busy"); return 2; } #endif ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0, "stream lua udp socket read timeout: %M", u->read_timeout); size = (size_t) luaL_optnumber(L, 2, UDP_MAX_DATAGRAM_SIZE); size = ngx_min(size, UDP_MAX_DATAGRAM_SIZE); u->recv_buf_size = size; ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0, "stream lua udp socket receive buffer size: %uz", u->recv_buf_size); rc = ngx_stream_lua_socket_udp_read(s, u); if (rc == NGX_ERROR) { dd("read failed: %d", (int) u->ft_type); rc = ngx_stream_lua_socket_udp_receive_retval_handler(s, u, L); dd("udp receive retval returned: %d", (int) rc); return rc; } if (rc == NGX_OK) { ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0, "stream lua udp socket receive done in a single run"); return ngx_stream_lua_socket_udp_receive_retval_handler(s, u, L); } /* n == NGX_AGAIN */ u->read_event_handler = ngx_stream_lua_socket_udp_read_handler; ctx = ngx_stream_get_module_ctx(s, ngx_stream_lua_module); if (ctx == NULL) { return luaL_error(L, "no session ctx found"); } coctx = ctx->cur_co_ctx; ngx_stream_lua_cleanup_pending_operation(coctx); coctx->cleanup = ngx_stream_lua_udp_socket_cleanup; coctx->data = u; ctx->write_event_handler = ngx_stream_lua_content_wev_handler; u->co_ctx = coctx; u->waiting = 1; u->prepare_retvals = ngx_stream_lua_socket_udp_receive_retval_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_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); }
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 */ }