mirror of
https://git.wownero.com/wownero/wownero.git
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1028 lines
27 KiB
C
1028 lines
27 KiB
C
/*
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* libunbound/worker.c - worker thread or process that resolves
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*
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* Copyright (c) 2007, NLnet Labs. All rights reserved.
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*
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* This software is open source.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the NLNET LABS nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \file
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*
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* This file contains the worker process or thread that performs
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* the DNS resolving and validation. The worker is called by a procedure
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* and if in the background continues until exit, if in the foreground
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* returns from the procedure when done.
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*/
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#include "config.h"
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#ifdef HAVE_SSL
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#include <openssl/ssl.h>
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#endif
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#include "libunbound/libworker.h"
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#include "libunbound/context.h"
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#include "libunbound/unbound.h"
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#include "libunbound/worker.h"
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#include "libunbound/unbound-event.h"
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#include "services/outside_network.h"
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#include "services/mesh.h"
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#include "services/localzone.h"
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#include "services/cache/rrset.h"
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#include "services/outbound_list.h"
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#include "util/fptr_wlist.h"
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#include "util/module.h"
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#include "util/regional.h"
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#include "util/random.h"
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#include "util/config_file.h"
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#include "util/netevent.h"
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#include "util/storage/lookup3.h"
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#include "util/storage/slabhash.h"
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#include "util/net_help.h"
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#include "util/data/dname.h"
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#include "util/data/msgreply.h"
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#include "util/data/msgencode.h"
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#include "util/tube.h"
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#include "iterator/iter_fwd.h"
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#include "iterator/iter_hints.h"
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#include "ldns/sbuffer.h"
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#include "ldns/str2wire.h"
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/** handle new query command for bg worker */
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static void handle_newq(struct libworker* w, uint8_t* buf, uint32_t len);
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/** delete libworker env */
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static void
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libworker_delete_env(struct libworker* w)
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{
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if(w->env) {
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outside_network_quit_prepare(w->back);
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mesh_delete(w->env->mesh);
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context_release_alloc(w->ctx, w->env->alloc,
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!w->is_bg || w->is_bg_thread);
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sldns_buffer_free(w->env->scratch_buffer);
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regional_destroy(w->env->scratch);
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forwards_delete(w->env->fwds);
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hints_delete(w->env->hints);
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ub_randfree(w->env->rnd);
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free(w->env);
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}
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#ifdef HAVE_SSL
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SSL_CTX_free(w->sslctx);
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#endif
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outside_network_delete(w->back);
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}
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/** delete libworker struct */
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static void
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libworker_delete(struct libworker* w)
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{
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if(!w) return;
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libworker_delete_env(w);
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comm_base_delete(w->base);
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free(w);
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}
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void
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libworker_delete_event(struct libworker* w)
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{
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if(!w) return;
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libworker_delete_env(w);
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comm_base_delete_no_base(w->base);
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free(w);
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}
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/** setup fresh libworker struct */
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static struct libworker*
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libworker_setup(struct ub_ctx* ctx, int is_bg, struct event_base* eb)
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{
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unsigned int seed;
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struct libworker* w = (struct libworker*)calloc(1, sizeof(*w));
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struct config_file* cfg = ctx->env->cfg;
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int* ports;
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int numports;
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if(!w) return NULL;
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w->is_bg = is_bg;
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w->ctx = ctx;
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w->env = (struct module_env*)malloc(sizeof(*w->env));
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if(!w->env) {
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free(w);
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return NULL;
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}
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*w->env = *ctx->env;
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w->env->alloc = context_obtain_alloc(ctx, !w->is_bg || w->is_bg_thread);
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if(!w->env->alloc) {
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libworker_delete(w);
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return NULL;
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}
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w->thread_num = w->env->alloc->thread_num;
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alloc_set_id_cleanup(w->env->alloc, &libworker_alloc_cleanup, w);
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if(!w->is_bg || w->is_bg_thread) {
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lock_basic_lock(&ctx->cfglock);
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}
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w->env->scratch = regional_create_custom(cfg->msg_buffer_size);
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w->env->scratch_buffer = sldns_buffer_new(cfg->msg_buffer_size);
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w->env->fwds = forwards_create();
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if(w->env->fwds && !forwards_apply_cfg(w->env->fwds, cfg)) {
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forwards_delete(w->env->fwds);
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w->env->fwds = NULL;
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}
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w->env->hints = hints_create();
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if(w->env->hints && !hints_apply_cfg(w->env->hints, cfg)) {
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hints_delete(w->env->hints);
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w->env->hints = NULL;
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}
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if(cfg->ssl_upstream) {
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w->sslctx = connect_sslctx_create(NULL, NULL, NULL);
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if(!w->sslctx) {
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/* to make the setup fail after unlock */
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hints_delete(w->env->hints);
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w->env->hints = NULL;
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}
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}
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if(!w->is_bg || w->is_bg_thread) {
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lock_basic_unlock(&ctx->cfglock);
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}
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if(!w->env->scratch || !w->env->scratch_buffer || !w->env->fwds ||
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!w->env->hints) {
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libworker_delete(w);
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return NULL;
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}
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w->env->worker = (struct worker*)w;
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w->env->probe_timer = NULL;
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seed = (unsigned int)time(NULL) ^ (unsigned int)getpid() ^
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(((unsigned int)w->thread_num)<<17);
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seed ^= (unsigned int)w->env->alloc->next_id;
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if(!w->is_bg || w->is_bg_thread) {
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lock_basic_lock(&ctx->cfglock);
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}
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if(!(w->env->rnd = ub_initstate(seed, ctx->seed_rnd))) {
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if(!w->is_bg || w->is_bg_thread) {
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lock_basic_unlock(&ctx->cfglock);
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}
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seed = 0;
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libworker_delete(w);
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return NULL;
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}
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if(!w->is_bg || w->is_bg_thread) {
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lock_basic_unlock(&ctx->cfglock);
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}
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if(1) {
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/* primitive lockout for threading: if it overwrites another
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* thread it is like wiping the cache (which is likely empty
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* at the start) */
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/* note we are holding the ctx lock in normal threaded
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* cases so that is solved properly, it is only for many ctx
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* in different threads that this may clash */
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static int done_raninit = 0;
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if(!done_raninit) {
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done_raninit = 1;
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hash_set_raninit((uint32_t)ub_random(w->env->rnd));
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}
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}
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seed = 0;
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if(eb)
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w->base = comm_base_create_event(eb);
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else w->base = comm_base_create(0);
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if(!w->base) {
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libworker_delete(w);
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return NULL;
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}
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if(!w->is_bg || w->is_bg_thread) {
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lock_basic_lock(&ctx->cfglock);
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}
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numports = cfg_condense_ports(cfg, &ports);
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if(numports == 0) {
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int locked = !w->is_bg || w->is_bg_thread;
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libworker_delete(w);
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if(locked) {
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lock_basic_unlock(&ctx->cfglock);
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}
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return NULL;
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}
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w->back = outside_network_create(w->base, cfg->msg_buffer_size,
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(size_t)cfg->outgoing_num_ports, cfg->out_ifs,
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cfg->num_out_ifs, cfg->do_ip4, cfg->do_ip6,
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cfg->do_tcp?cfg->outgoing_num_tcp:0,
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w->env->infra_cache, w->env->rnd, cfg->use_caps_bits_for_id,
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ports, numports, cfg->unwanted_threshold,
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&libworker_alloc_cleanup, w, cfg->do_udp, w->sslctx,
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cfg->delay_close, NULL);
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if(!w->is_bg || w->is_bg_thread) {
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lock_basic_unlock(&ctx->cfglock);
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}
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free(ports);
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if(!w->back) {
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libworker_delete(w);
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return NULL;
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}
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w->env->mesh = mesh_create(&ctx->mods, w->env);
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if(!w->env->mesh) {
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libworker_delete(w);
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return NULL;
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}
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w->env->send_query = &libworker_send_query;
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w->env->detach_subs = &mesh_detach_subs;
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w->env->attach_sub = &mesh_attach_sub;
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w->env->kill_sub = &mesh_state_delete;
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w->env->detect_cycle = &mesh_detect_cycle;
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comm_base_timept(w->base, &w->env->now, &w->env->now_tv);
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return w;
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}
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struct libworker* libworker_create_event(struct ub_ctx* ctx,
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struct event_base* eb)
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{
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return libworker_setup(ctx, 0, eb);
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}
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/** handle cancel command for bg worker */
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static void
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handle_cancel(struct libworker* w, uint8_t* buf, uint32_t len)
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{
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struct ctx_query* q;
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if(w->is_bg_thread) {
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lock_basic_lock(&w->ctx->cfglock);
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q = context_deserialize_cancel(w->ctx, buf, len);
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lock_basic_unlock(&w->ctx->cfglock);
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} else {
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q = context_deserialize_cancel(w->ctx, buf, len);
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}
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if(!q) {
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/* probably simply lookup failed, i.e. the message had been
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* processed and answered before the cancel arrived */
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return;
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}
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q->cancelled = 1;
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free(buf);
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}
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/** do control command coming into bg server */
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static void
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libworker_do_cmd(struct libworker* w, uint8_t* msg, uint32_t len)
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{
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switch(context_serial_getcmd(msg, len)) {
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default:
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case UB_LIBCMD_ANSWER:
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log_err("unknown command for bg worker %d",
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(int)context_serial_getcmd(msg, len));
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/* and fall through to quit */
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case UB_LIBCMD_QUIT:
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free(msg);
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comm_base_exit(w->base);
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break;
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case UB_LIBCMD_NEWQUERY:
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handle_newq(w, msg, len);
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break;
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case UB_LIBCMD_CANCEL:
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handle_cancel(w, msg, len);
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break;
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}
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}
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/** handle control command coming into server */
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void
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libworker_handle_control_cmd(struct tube* ATTR_UNUSED(tube),
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uint8_t* msg, size_t len, int err, void* arg)
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{
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struct libworker* w = (struct libworker*)arg;
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if(err != 0) {
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free(msg);
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/* it is of no use to go on, exit */
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comm_base_exit(w->base);
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return;
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}
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libworker_do_cmd(w, msg, len); /* also frees the buf */
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}
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/** the background thread func */
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static void*
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libworker_dobg(void* arg)
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{
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/* setup */
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uint32_t m;
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struct libworker* w = (struct libworker*)arg;
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struct ub_ctx* ctx;
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if(!w) {
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log_err("libunbound bg worker init failed, nomem");
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return NULL;
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}
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ctx = w->ctx;
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log_thread_set(&w->thread_num);
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#ifdef THREADS_DISABLED
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/* we are forked */
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w->is_bg_thread = 0;
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/* close non-used parts of the pipes */
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tube_close_write(ctx->qq_pipe);
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tube_close_read(ctx->rr_pipe);
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#endif
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if(!tube_setup_bg_listen(ctx->qq_pipe, w->base,
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libworker_handle_control_cmd, w)) {
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log_err("libunbound bg worker init failed, no bglisten");
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return NULL;
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}
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if(!tube_setup_bg_write(ctx->rr_pipe, w->base)) {
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log_err("libunbound bg worker init failed, no bgwrite");
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return NULL;
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}
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/* do the work */
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comm_base_dispatch(w->base);
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/* cleanup */
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m = UB_LIBCMD_QUIT;
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tube_remove_bg_listen(w->ctx->qq_pipe);
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tube_remove_bg_write(w->ctx->rr_pipe);
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libworker_delete(w);
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(void)tube_write_msg(ctx->rr_pipe, (uint8_t*)&m,
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(uint32_t)sizeof(m), 0);
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#ifdef THREADS_DISABLED
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/* close pipes from forked process before exit */
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tube_close_read(ctx->qq_pipe);
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tube_close_write(ctx->rr_pipe);
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#endif
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return NULL;
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}
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int libworker_bg(struct ub_ctx* ctx)
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{
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struct libworker* w;
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/* fork or threadcreate */
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lock_basic_lock(&ctx->cfglock);
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if(ctx->dothread) {
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lock_basic_unlock(&ctx->cfglock);
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w = libworker_setup(ctx, 1, NULL);
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if(!w) return UB_NOMEM;
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w->is_bg_thread = 1;
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#ifdef ENABLE_LOCK_CHECKS
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w->thread_num = 1; /* for nicer DEBUG checklocks */
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#endif
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ub_thread_create(&ctx->bg_tid, libworker_dobg, w);
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} else {
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lock_basic_unlock(&ctx->cfglock);
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#ifndef HAVE_FORK
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/* no fork on windows */
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return UB_FORKFAIL;
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#else /* HAVE_FORK */
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switch((ctx->bg_pid=fork())) {
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case 0:
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w = libworker_setup(ctx, 1, NULL);
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if(!w) fatal_exit("out of memory");
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/* close non-used parts of the pipes */
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tube_close_write(ctx->qq_pipe);
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tube_close_read(ctx->rr_pipe);
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(void)libworker_dobg(w);
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exit(0);
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break;
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case -1:
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return UB_FORKFAIL;
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default:
|
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/* close non-used parts, so that the worker
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* bgprocess gets 'pipe closed' when the
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* main process exits */
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tube_close_read(ctx->qq_pipe);
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tube_close_write(ctx->rr_pipe);
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break;
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}
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#endif /* HAVE_FORK */
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}
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return UB_NOERROR;
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}
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|
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/** get msg reply struct (in temp region) */
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static struct reply_info*
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parse_reply(sldns_buffer* pkt, struct regional* region, struct query_info* qi)
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{
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struct reply_info* rep;
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struct msg_parse* msg;
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if(!(msg = regional_alloc(region, sizeof(*msg)))) {
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return NULL;
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}
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memset(msg, 0, sizeof(*msg));
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sldns_buffer_set_position(pkt, 0);
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if(parse_packet(pkt, msg, region) != 0)
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return 0;
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if(!parse_create_msg(pkt, msg, NULL, qi, &rep, region)) {
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return 0;
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}
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return rep;
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}
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/** insert canonname */
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static int
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fill_canon(struct ub_result* res, uint8_t* s)
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{
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char buf[255+2];
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dname_str(s, buf);
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res->canonname = strdup(buf);
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return res->canonname != 0;
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}
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|
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/** fill data into result */
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static int
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fill_res(struct ub_result* res, struct ub_packed_rrset_key* answer,
|
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uint8_t* finalcname, struct query_info* rq, struct reply_info* rep)
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{
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size_t i;
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struct packed_rrset_data* data;
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res->ttl = 0;
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if(!answer) {
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if(finalcname) {
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if(!fill_canon(res, finalcname))
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return 0; /* out of memory */
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}
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if(rep->rrset_count != 0)
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res->ttl = (int)rep->ttl;
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res->data = (char**)calloc(1, sizeof(char*));
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res->len = (int*)calloc(1, sizeof(int));
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return (res->data && res->len);
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}
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data = (struct packed_rrset_data*)answer->entry.data;
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if(query_dname_compare(rq->qname, answer->rk.dname) != 0) {
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if(!fill_canon(res, answer->rk.dname))
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return 0; /* out of memory */
|
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} else res->canonname = NULL;
|
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res->data = (char**)calloc(data->count+1, sizeof(char*));
|
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res->len = (int*)calloc(data->count+1, sizeof(int));
|
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if(!res->data || !res->len)
|
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return 0; /* out of memory */
|
|
for(i=0; i<data->count; i++) {
|
|
/* remove rdlength from rdata */
|
|
res->len[i] = (int)(data->rr_len[i] - 2);
|
|
res->data[i] = memdup(data->rr_data[i]+2, (size_t)res->len[i]);
|
|
if(!res->data[i])
|
|
return 0; /* out of memory */
|
|
}
|
|
/* ttl for positive answers, from CNAME and answer RRs */
|
|
if(data->count != 0) {
|
|
size_t j;
|
|
res->ttl = (int)data->ttl;
|
|
for(j=0; j<rep->an_numrrsets; j++) {
|
|
struct packed_rrset_data* d =
|
|
(struct packed_rrset_data*)rep->rrsets[j]->
|
|
entry.data;
|
|
if((int)d->ttl < res->ttl)
|
|
res->ttl = (int)d->ttl;
|
|
}
|
|
}
|
|
/* ttl for negative answers */
|
|
if(data->count == 0 && rep->rrset_count != 0)
|
|
res->ttl = (int)rep->ttl;
|
|
res->data[data->count] = NULL;
|
|
res->len[data->count] = 0;
|
|
return 1;
|
|
}
|
|
|
|
/** fill result from parsed message, on error fills servfail */
|
|
void
|
|
libworker_enter_result(struct ub_result* res, sldns_buffer* buf,
|
|
struct regional* temp, enum sec_status msg_security)
|
|
{
|
|
struct query_info rq;
|
|
struct reply_info* rep;
|
|
res->rcode = LDNS_RCODE_SERVFAIL;
|
|
rep = parse_reply(buf, temp, &rq);
|
|
if(!rep) {
|
|
log_err("cannot parse buf");
|
|
return; /* error parsing buf, or out of memory */
|
|
}
|
|
if(!fill_res(res, reply_find_answer_rrset(&rq, rep),
|
|
reply_find_final_cname_target(&rq, rep), &rq, rep))
|
|
return; /* out of memory */
|
|
/* rcode, havedata, nxdomain, secure, bogus */
|
|
res->rcode = (int)FLAGS_GET_RCODE(rep->flags);
|
|
if(res->data && res->data[0])
|
|
res->havedata = 1;
|
|
if(res->rcode == LDNS_RCODE_NXDOMAIN)
|
|
res->nxdomain = 1;
|
|
if(msg_security == sec_status_secure)
|
|
res->secure = 1;
|
|
if(msg_security == sec_status_bogus)
|
|
res->bogus = 1;
|
|
}
|
|
|
|
/** fillup fg results */
|
|
static void
|
|
libworker_fillup_fg(struct ctx_query* q, int rcode, sldns_buffer* buf,
|
|
enum sec_status s, char* why_bogus)
|
|
{
|
|
if(why_bogus)
|
|
q->res->why_bogus = strdup(why_bogus);
|
|
if(rcode != 0) {
|
|
q->res->rcode = rcode;
|
|
q->msg_security = s;
|
|
return;
|
|
}
|
|
|
|
q->res->rcode = LDNS_RCODE_SERVFAIL;
|
|
q->msg_security = 0;
|
|
q->msg = memdup(sldns_buffer_begin(buf), sldns_buffer_limit(buf));
|
|
q->msg_len = sldns_buffer_limit(buf);
|
|
if(!q->msg) {
|
|
return; /* the error is in the rcode */
|
|
}
|
|
|
|
/* canonname and results */
|
|
q->msg_security = s;
|
|
libworker_enter_result(q->res, buf, q->w->env->scratch, s);
|
|
}
|
|
|
|
void
|
|
libworker_fg_done_cb(void* arg, int rcode, sldns_buffer* buf, enum sec_status s,
|
|
char* why_bogus)
|
|
{
|
|
struct ctx_query* q = (struct ctx_query*)arg;
|
|
/* fg query is done; exit comm base */
|
|
comm_base_exit(q->w->base);
|
|
|
|
libworker_fillup_fg(q, rcode, buf, s, why_bogus);
|
|
}
|
|
|
|
/** setup qinfo and edns */
|
|
static int
|
|
setup_qinfo_edns(struct libworker* w, struct ctx_query* q,
|
|
struct query_info* qinfo, struct edns_data* edns)
|
|
{
|
|
qinfo->qtype = (uint16_t)q->res->qtype;
|
|
qinfo->qclass = (uint16_t)q->res->qclass;
|
|
qinfo->qname = sldns_str2wire_dname(q->res->qname, &qinfo->qname_len);
|
|
if(!qinfo->qname) {
|
|
return 0;
|
|
}
|
|
edns->edns_present = 1;
|
|
edns->ext_rcode = 0;
|
|
edns->edns_version = 0;
|
|
edns->bits = EDNS_DO;
|
|
if(sldns_buffer_capacity(w->back->udp_buff) < 65535)
|
|
edns->udp_size = (uint16_t)sldns_buffer_capacity(
|
|
w->back->udp_buff);
|
|
else edns->udp_size = 65535;
|
|
return 1;
|
|
}
|
|
|
|
int libworker_fg(struct ub_ctx* ctx, struct ctx_query* q)
|
|
{
|
|
struct libworker* w = libworker_setup(ctx, 0, NULL);
|
|
uint16_t qflags, qid;
|
|
struct query_info qinfo;
|
|
struct edns_data edns;
|
|
if(!w)
|
|
return UB_INITFAIL;
|
|
if(!setup_qinfo_edns(w, q, &qinfo, &edns)) {
|
|
libworker_delete(w);
|
|
return UB_SYNTAX;
|
|
}
|
|
qid = 0;
|
|
qflags = BIT_RD;
|
|
q->w = w;
|
|
/* see if there is a fixed answer */
|
|
sldns_buffer_write_u16_at(w->back->udp_buff, 0, qid);
|
|
sldns_buffer_write_u16_at(w->back->udp_buff, 2, qflags);
|
|
if(local_zones_answer(ctx->local_zones, &qinfo, &edns,
|
|
w->back->udp_buff, w->env->scratch)) {
|
|
regional_free_all(w->env->scratch);
|
|
libworker_fillup_fg(q, LDNS_RCODE_NOERROR,
|
|
w->back->udp_buff, sec_status_insecure, NULL);
|
|
libworker_delete(w);
|
|
free(qinfo.qname);
|
|
return UB_NOERROR;
|
|
}
|
|
/* process new query */
|
|
if(!mesh_new_callback(w->env->mesh, &qinfo, qflags, &edns,
|
|
w->back->udp_buff, qid, libworker_fg_done_cb, q)) {
|
|
free(qinfo.qname);
|
|
return UB_NOMEM;
|
|
}
|
|
free(qinfo.qname);
|
|
|
|
/* wait for reply */
|
|
comm_base_dispatch(w->base);
|
|
|
|
libworker_delete(w);
|
|
return UB_NOERROR;
|
|
}
|
|
|
|
void
|
|
libworker_event_done_cb(void* arg, int rcode, sldns_buffer* buf,
|
|
enum sec_status s, char* why_bogus)
|
|
{
|
|
struct ctx_query* q = (struct ctx_query*)arg;
|
|
ub_event_callback_t cb = (ub_event_callback_t)q->cb;
|
|
void* cb_arg = q->cb_arg;
|
|
int cancelled = q->cancelled;
|
|
|
|
/* delete it now */
|
|
struct ub_ctx* ctx = q->w->ctx;
|
|
lock_basic_lock(&ctx->cfglock);
|
|
(void)rbtree_delete(&ctx->queries, q->node.key);
|
|
ctx->num_async--;
|
|
context_query_delete(q);
|
|
lock_basic_unlock(&ctx->cfglock);
|
|
|
|
if(!cancelled) {
|
|
/* call callback */
|
|
int sec = 0;
|
|
if(s == sec_status_bogus)
|
|
sec = 1;
|
|
else if(s == sec_status_secure)
|
|
sec = 2;
|
|
(*cb)(cb_arg, rcode, (void*)sldns_buffer_begin(buf),
|
|
(int)sldns_buffer_limit(buf), sec, why_bogus);
|
|
}
|
|
}
|
|
|
|
int libworker_attach_mesh(struct ub_ctx* ctx, struct ctx_query* q,
|
|
int* async_id)
|
|
{
|
|
struct libworker* w = ctx->event_worker;
|
|
uint16_t qflags, qid;
|
|
struct query_info qinfo;
|
|
struct edns_data edns;
|
|
if(!w)
|
|
return UB_INITFAIL;
|
|
if(!setup_qinfo_edns(w, q, &qinfo, &edns))
|
|
return UB_SYNTAX;
|
|
qid = 0;
|
|
qflags = BIT_RD;
|
|
q->w = w;
|
|
/* see if there is a fixed answer */
|
|
sldns_buffer_write_u16_at(w->back->udp_buff, 0, qid);
|
|
sldns_buffer_write_u16_at(w->back->udp_buff, 2, qflags);
|
|
if(local_zones_answer(ctx->local_zones, &qinfo, &edns,
|
|
w->back->udp_buff, w->env->scratch)) {
|
|
regional_free_all(w->env->scratch);
|
|
free(qinfo.qname);
|
|
libworker_event_done_cb(q, LDNS_RCODE_NOERROR,
|
|
w->back->udp_buff, sec_status_insecure, NULL);
|
|
return UB_NOERROR;
|
|
}
|
|
/* process new query */
|
|
if(async_id)
|
|
*async_id = q->querynum;
|
|
if(!mesh_new_callback(w->env->mesh, &qinfo, qflags, &edns,
|
|
w->back->udp_buff, qid, libworker_event_done_cb, q)) {
|
|
free(qinfo.qname);
|
|
return UB_NOMEM;
|
|
}
|
|
free(qinfo.qname);
|
|
return UB_NOERROR;
|
|
}
|
|
|
|
/** add result to the bg worker result queue */
|
|
static void
|
|
add_bg_result(struct libworker* w, struct ctx_query* q, sldns_buffer* pkt,
|
|
int err, char* reason)
|
|
{
|
|
uint8_t* msg = NULL;
|
|
uint32_t len = 0;
|
|
|
|
/* serialize and delete unneeded q */
|
|
if(w->is_bg_thread) {
|
|
lock_basic_lock(&w->ctx->cfglock);
|
|
if(reason)
|
|
q->res->why_bogus = strdup(reason);
|
|
if(pkt) {
|
|
q->msg_len = sldns_buffer_remaining(pkt);
|
|
q->msg = memdup(sldns_buffer_begin(pkt), q->msg_len);
|
|
if(!q->msg)
|
|
msg = context_serialize_answer(q, UB_NOMEM,
|
|
NULL, &len);
|
|
else msg = context_serialize_answer(q, err,
|
|
NULL, &len);
|
|
} else msg = context_serialize_answer(q, err, NULL, &len);
|
|
lock_basic_unlock(&w->ctx->cfglock);
|
|
} else {
|
|
if(reason)
|
|
q->res->why_bogus = strdup(reason);
|
|
msg = context_serialize_answer(q, err, pkt, &len);
|
|
(void)rbtree_delete(&w->ctx->queries, q->node.key);
|
|
w->ctx->num_async--;
|
|
context_query_delete(q);
|
|
}
|
|
|
|
if(!msg) {
|
|
log_err("out of memory for async answer");
|
|
return;
|
|
}
|
|
if(!tube_queue_item(w->ctx->rr_pipe, msg, len)) {
|
|
log_err("out of memory for async answer");
|
|
return;
|
|
}
|
|
}
|
|
|
|
void
|
|
libworker_bg_done_cb(void* arg, int rcode, sldns_buffer* buf, enum sec_status s,
|
|
char* why_bogus)
|
|
{
|
|
struct ctx_query* q = (struct ctx_query*)arg;
|
|
|
|
if(q->cancelled) {
|
|
if(q->w->is_bg_thread) {
|
|
/* delete it now */
|
|
struct ub_ctx* ctx = q->w->ctx;
|
|
lock_basic_lock(&ctx->cfglock);
|
|
(void)rbtree_delete(&ctx->queries, q->node.key);
|
|
ctx->num_async--;
|
|
context_query_delete(q);
|
|
lock_basic_unlock(&ctx->cfglock);
|
|
}
|
|
/* cancelled, do not give answer */
|
|
return;
|
|
}
|
|
q->msg_security = s;
|
|
if(!buf)
|
|
buf = q->w->env->scratch_buffer;
|
|
if(rcode != 0) {
|
|
error_encode(buf, rcode, NULL, 0, BIT_RD, NULL);
|
|
}
|
|
add_bg_result(q->w, q, buf, UB_NOERROR, why_bogus);
|
|
}
|
|
|
|
|
|
/** handle new query command for bg worker */
|
|
static void
|
|
handle_newq(struct libworker* w, uint8_t* buf, uint32_t len)
|
|
{
|
|
uint16_t qflags, qid;
|
|
struct query_info qinfo;
|
|
struct edns_data edns;
|
|
struct ctx_query* q;
|
|
if(w->is_bg_thread) {
|
|
lock_basic_lock(&w->ctx->cfglock);
|
|
q = context_lookup_new_query(w->ctx, buf, len);
|
|
lock_basic_unlock(&w->ctx->cfglock);
|
|
} else {
|
|
q = context_deserialize_new_query(w->ctx, buf, len);
|
|
}
|
|
free(buf);
|
|
if(!q) {
|
|
log_err("failed to deserialize newq");
|
|
return;
|
|
}
|
|
if(!setup_qinfo_edns(w, q, &qinfo, &edns)) {
|
|
add_bg_result(w, q, NULL, UB_SYNTAX, NULL);
|
|
return;
|
|
}
|
|
qid = 0;
|
|
qflags = BIT_RD;
|
|
/* see if there is a fixed answer */
|
|
sldns_buffer_write_u16_at(w->back->udp_buff, 0, qid);
|
|
sldns_buffer_write_u16_at(w->back->udp_buff, 2, qflags);
|
|
if(local_zones_answer(w->ctx->local_zones, &qinfo, &edns,
|
|
w->back->udp_buff, w->env->scratch)) {
|
|
regional_free_all(w->env->scratch);
|
|
q->msg_security = sec_status_insecure;
|
|
add_bg_result(w, q, w->back->udp_buff, UB_NOERROR, NULL);
|
|
free(qinfo.qname);
|
|
return;
|
|
}
|
|
q->w = w;
|
|
/* process new query */
|
|
if(!mesh_new_callback(w->env->mesh, &qinfo, qflags, &edns,
|
|
w->back->udp_buff, qid, libworker_bg_done_cb, q)) {
|
|
add_bg_result(w, q, NULL, UB_NOMEM, NULL);
|
|
}
|
|
free(qinfo.qname);
|
|
}
|
|
|
|
void libworker_alloc_cleanup(void* arg)
|
|
{
|
|
struct libworker* w = (struct libworker*)arg;
|
|
slabhash_clear(&w->env->rrset_cache->table);
|
|
slabhash_clear(w->env->msg_cache);
|
|
}
|
|
|
|
struct outbound_entry* libworker_send_query(uint8_t* qname, size_t qnamelen,
|
|
uint16_t qtype, uint16_t qclass, uint16_t flags, int dnssec,
|
|
int want_dnssec, int nocaps, struct sockaddr_storage* addr,
|
|
socklen_t addrlen, uint8_t* zone, size_t zonelen,
|
|
struct module_qstate* q)
|
|
{
|
|
struct libworker* w = (struct libworker*)q->env->worker;
|
|
struct outbound_entry* e = (struct outbound_entry*)regional_alloc(
|
|
q->region, sizeof(*e));
|
|
if(!e)
|
|
return NULL;
|
|
e->qstate = q;
|
|
e->qsent = outnet_serviced_query(w->back, qname,
|
|
qnamelen, qtype, qclass, flags, dnssec, want_dnssec, nocaps,
|
|
q->env->cfg->tcp_upstream, q->env->cfg->ssl_upstream, addr,
|
|
addrlen, zone, zonelen, libworker_handle_service_reply, e,
|
|
w->back->udp_buff);
|
|
if(!e->qsent) {
|
|
return NULL;
|
|
}
|
|
return e;
|
|
}
|
|
|
|
int
|
|
libworker_handle_reply(struct comm_point* c, void* arg, int error,
|
|
struct comm_reply* reply_info)
|
|
{
|
|
struct module_qstate* q = (struct module_qstate*)arg;
|
|
struct libworker* lw = (struct libworker*)q->env->worker;
|
|
struct outbound_entry e;
|
|
e.qstate = q;
|
|
e.qsent = NULL;
|
|
|
|
if(error != 0) {
|
|
mesh_report_reply(lw->env->mesh, &e, reply_info, error);
|
|
return 0;
|
|
}
|
|
/* sanity check. */
|
|
if(!LDNS_QR_WIRE(sldns_buffer_begin(c->buffer))
|
|
|| LDNS_OPCODE_WIRE(sldns_buffer_begin(c->buffer)) !=
|
|
LDNS_PACKET_QUERY
|
|
|| LDNS_QDCOUNT(sldns_buffer_begin(c->buffer)) > 1) {
|
|
/* error becomes timeout for the module as if this reply
|
|
* never arrived. */
|
|
mesh_report_reply(lw->env->mesh, &e, reply_info,
|
|
NETEVENT_TIMEOUT);
|
|
return 0;
|
|
}
|
|
mesh_report_reply(lw->env->mesh, &e, reply_info, NETEVENT_NOERROR);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
libworker_handle_service_reply(struct comm_point* c, void* arg, int error,
|
|
struct comm_reply* reply_info)
|
|
{
|
|
struct outbound_entry* e = (struct outbound_entry*)arg;
|
|
struct libworker* lw = (struct libworker*)e->qstate->env->worker;
|
|
|
|
if(error != 0) {
|
|
mesh_report_reply(lw->env->mesh, e, reply_info, error);
|
|
return 0;
|
|
}
|
|
/* sanity check. */
|
|
if(!LDNS_QR_WIRE(sldns_buffer_begin(c->buffer))
|
|
|| LDNS_OPCODE_WIRE(sldns_buffer_begin(c->buffer)) !=
|
|
LDNS_PACKET_QUERY
|
|
|| LDNS_QDCOUNT(sldns_buffer_begin(c->buffer)) > 1) {
|
|
/* error becomes timeout for the module as if this reply
|
|
* never arrived. */
|
|
mesh_report_reply(lw->env->mesh, e, reply_info,
|
|
NETEVENT_TIMEOUT);
|
|
return 0;
|
|
}
|
|
mesh_report_reply(lw->env->mesh, e, reply_info, NETEVENT_NOERROR);
|
|
return 0;
|
|
}
|
|
|
|
/* --- fake callbacks for fptr_wlist to work --- */
|
|
void worker_handle_control_cmd(struct tube* ATTR_UNUSED(tube),
|
|
uint8_t* ATTR_UNUSED(buffer), size_t ATTR_UNUSED(len),
|
|
int ATTR_UNUSED(error), void* ATTR_UNUSED(arg))
|
|
{
|
|
log_assert(0);
|
|
}
|
|
|
|
int worker_handle_request(struct comm_point* ATTR_UNUSED(c),
|
|
void* ATTR_UNUSED(arg), int ATTR_UNUSED(error),
|
|
struct comm_reply* ATTR_UNUSED(repinfo))
|
|
{
|
|
log_assert(0);
|
|
return 0;
|
|
}
|
|
|
|
int worker_handle_reply(struct comm_point* ATTR_UNUSED(c),
|
|
void* ATTR_UNUSED(arg), int ATTR_UNUSED(error),
|
|
struct comm_reply* ATTR_UNUSED(reply_info))
|
|
{
|
|
log_assert(0);
|
|
return 0;
|
|
}
|
|
|
|
int worker_handle_service_reply(struct comm_point* ATTR_UNUSED(c),
|
|
void* ATTR_UNUSED(arg), int ATTR_UNUSED(error),
|
|
struct comm_reply* ATTR_UNUSED(reply_info))
|
|
{
|
|
log_assert(0);
|
|
return 0;
|
|
}
|
|
|
|
int remote_accept_callback(struct comm_point* ATTR_UNUSED(c),
|
|
void* ATTR_UNUSED(arg), int ATTR_UNUSED(error),
|
|
struct comm_reply* ATTR_UNUSED(repinfo))
|
|
{
|
|
log_assert(0);
|
|
return 0;
|
|
}
|
|
|
|
int remote_control_callback(struct comm_point* ATTR_UNUSED(c),
|
|
void* ATTR_UNUSED(arg), int ATTR_UNUSED(error),
|
|
struct comm_reply* ATTR_UNUSED(repinfo))
|
|
{
|
|
log_assert(0);
|
|
return 0;
|
|
}
|
|
|
|
void worker_sighandler(int ATTR_UNUSED(sig), void* ATTR_UNUSED(arg))
|
|
{
|
|
log_assert(0);
|
|
}
|
|
|
|
struct outbound_entry* worker_send_query(uint8_t* ATTR_UNUSED(qname),
|
|
size_t ATTR_UNUSED(qnamelen), uint16_t ATTR_UNUSED(qtype),
|
|
uint16_t ATTR_UNUSED(qclass), uint16_t ATTR_UNUSED(flags),
|
|
int ATTR_UNUSED(dnssec), int ATTR_UNUSED(want_dnssec),
|
|
int ATTR_UNUSED(nocaps), struct sockaddr_storage* ATTR_UNUSED(addr),
|
|
socklen_t ATTR_UNUSED(addrlen), uint8_t* ATTR_UNUSED(zone),
|
|
size_t ATTR_UNUSED(zonelen), struct module_qstate* ATTR_UNUSED(q))
|
|
{
|
|
log_assert(0);
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
worker_alloc_cleanup(void* ATTR_UNUSED(arg))
|
|
{
|
|
log_assert(0);
|
|
}
|
|
|
|
void worker_stat_timer_cb(void* ATTR_UNUSED(arg))
|
|
{
|
|
log_assert(0);
|
|
}
|
|
|
|
void worker_probe_timer_cb(void* ATTR_UNUSED(arg))
|
|
{
|
|
log_assert(0);
|
|
}
|
|
|
|
void worker_start_accept(void* ATTR_UNUSED(arg))
|
|
{
|
|
log_assert(0);
|
|
}
|
|
|
|
void worker_stop_accept(void* ATTR_UNUSED(arg))
|
|
{
|
|
log_assert(0);
|
|
}
|
|
|
|
int order_lock_cmp(const void* ATTR_UNUSED(e1), const void* ATTR_UNUSED(e2))
|
|
{
|
|
log_assert(0);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
codeline_cmp(const void* ATTR_UNUSED(a), const void* ATTR_UNUSED(b))
|
|
{
|
|
log_assert(0);
|
|
return 0;
|
|
}
|
|
|
|
int replay_var_compare(const void* ATTR_UNUSED(a), const void* ATTR_UNUSED(b))
|
|
{
|
|
log_assert(0);
|
|
return 0;
|
|
}
|
|
|
|
void remote_get_opt_ssl(char* ATTR_UNUSED(str), void* ATTR_UNUSED(arg))
|
|
{
|
|
log_assert(0);
|
|
}
|
|
|
|
#ifdef UB_ON_WINDOWS
|
|
void
|
|
worker_win_stop_cb(int ATTR_UNUSED(fd), short ATTR_UNUSED(ev), void*
|
|
ATTR_UNUSED(arg)) {
|
|
log_assert(0);
|
|
}
|
|
|
|
void
|
|
wsvc_cron_cb(void* ATTR_UNUSED(arg))
|
|
{
|
|
log_assert(0);
|
|
}
|
|
#endif /* UB_ON_WINDOWS */
|