unbound
0.1
|
This file contains the worker process or thread that performs the DNS resolving and validation. More...
#include "config.h"
#include <ldns/dname.h>
#include <ldns/wire2host.h>
#include <openssl/ssl.h>
#include "libunbound/libworker.h"
#include "libunbound/context.h"
#include "libunbound/unbound.h"
#include "services/outside_network.h"
#include "services/mesh.h"
#include "services/localzone.h"
#include "services/cache/rrset.h"
#include "services/outbound_list.h"
#include "util/module.h"
#include "util/regional.h"
#include "util/random.h"
#include "util/config_file.h"
#include "util/netevent.h"
#include "util/storage/lookup3.h"
#include "util/storage/slabhash.h"
#include "util/net_help.h"
#include "util/data/dname.h"
#include "util/data/msgreply.h"
#include "util/data/msgencode.h"
#include "util/tube.h"
#include "iterator/iter_fwd.h"
Functions | |
static void | handle_newq (struct libworker *w, uint8_t *buf, uint32_t len) |
handle new query command for bg worker | |
static void | libworker_delete (struct libworker *w) |
delete libworker struct | |
static struct libworker * | libworker_setup (struct ub_ctx *ctx, int is_bg) |
setup fresh libworker struct | |
static void | handle_cancel (struct libworker *w, uint8_t *buf, uint32_t len) |
handle cancel command for bg worker | |
static void | libworker_do_cmd (struct libworker *w, uint8_t *msg, uint32_t len) |
do control command coming into bg server | |
void | libworker_handle_control_cmd (struct tube *ATTR_UNUSED(tube), uint8_t *msg, size_t len, int err, void *arg) |
handle control command coming into server | |
static void * | libworker_dobg (void *arg) |
the background thread func | |
int | libworker_bg (struct ub_ctx *ctx) |
Create a background worker. | |
static struct reply_info * | parse_reply (ldns_buffer *pkt, struct regional *region, struct query_info *qi) |
get msg reply struct (in temp region) | |
static int | fill_canon (struct ub_result *res, uint8_t *s) |
insert canonname | |
static int | fill_res (struct ub_result *res, struct ub_packed_rrset_key *answer, uint8_t *finalcname, struct query_info *rq) |
fill data into result | |
void | libworker_enter_result (struct ub_result *res, ldns_buffer *buf, struct regional *temp, enum sec_status msg_security) |
fill result from parsed message, on error fills servfail | |
static void | libworker_fillup_fg (struct ctx_query *q, int rcode, ldns_buffer *buf, enum sec_status s, char *why_bogus) |
fillup fg results | |
void | libworker_fg_done_cb (void *arg, int rcode, ldns_buffer *buf, enum sec_status s, char *why_bogus) |
mesh callback with fg results | |
static int | setup_qinfo_edns (struct libworker *w, struct ctx_query *q, struct query_info *qinfo, struct edns_data *edns) |
setup qinfo and edns | |
int | libworker_fg (struct ub_ctx *ctx, struct ctx_query *q) |
Create a foreground worker. | |
static void | add_bg_result (struct libworker *w, struct ctx_query *q, ldns_buffer *pkt, int err, char *reason) |
add result to the bg worker result queue | |
void | libworker_bg_done_cb (void *arg, int rcode, ldns_buffer *buf, enum sec_status s, char *why_bogus) |
mesh callback with bg results | |
void | libworker_alloc_cleanup (void *arg) |
cleanup the cache to remove all rrset IDs from it, arg is libworker | |
static int | outbound_entry_compare (void *a, void *b) |
compare outbound entry qstates | |
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, struct sockaddr_storage *addr, socklen_t addrlen, uint8_t *zone, size_t zonelen, struct module_qstate *q) |
Worker service routine to send serviced queries to authoritative servers. | |
int | libworker_handle_reply (struct comm_point *c, void *arg, int error, struct comm_reply *reply_info) |
process incoming replies from the network | |
int | libworker_handle_service_reply (struct comm_point *c, void *arg, int error, struct comm_reply *reply_info) |
process incoming serviced query replies from the network | |
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)) |
int | worker_handle_request (struct comm_point *ATTR_UNUSED(c), void *ATTR_UNUSED(arg), int ATTR_UNUSED(error), struct comm_reply *ATTR_UNUSED(repinfo)) |
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)) |
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)) |
int | remote_accept_callback (struct comm_point *ATTR_UNUSED(c), void *ATTR_UNUSED(arg), int ATTR_UNUSED(error), struct comm_reply *ATTR_UNUSED(repinfo)) |
int | remote_control_callback (struct comm_point *ATTR_UNUSED(c), void *ATTR_UNUSED(arg), int ATTR_UNUSED(error), struct comm_reply *ATTR_UNUSED(repinfo)) |
void | worker_sighandler (int ATTR_UNUSED(sig), void *ATTR_UNUSED(arg)) |
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), struct sockaddr_storage *ATTR_UNUSED(addr), socklen_t ATTR_UNUSED(addrlen), struct module_qstate *ATTR_UNUSED(q)) |
void | worker_alloc_cleanup (void *ATTR_UNUSED(arg)) |
void | worker_stat_timer_cb (void *ATTR_UNUSED(arg)) |
void | worker_probe_timer_cb (void *ATTR_UNUSED(arg)) |
int | order_lock_cmp (const void *ATTR_UNUSED(e1), const void *ATTR_UNUSED(e2)) |
int | codeline_cmp (const void *ATTR_UNUSED(a), const void *ATTR_UNUSED(b)) |
int | replay_var_compare (const void *ATTR_UNUSED(a), const void *ATTR_UNUSED(b)) |
void | remote_get_opt_ssl (char *ATTR_UNUSED(str), void *ATTR_UNUSED(arg)) |
This file contains the worker process or thread that performs the DNS resolving and validation.
The worker is called by a procedure and if in the background continues until exit, if in the foreground returns from the procedure when done.
int libworker_bg | ( | struct ub_ctx * | ctx | ) |
Create a background worker.
ctx,: | is updated with pid/tid of the background worker. a new allocation cache is obtained from ctx. It contains the threadnumber and unique id for further (shared) cache insertions. |
References ub_ctx::bg_pid, ub_ctx::bg_tid, ub_ctx::cfglock, ub_ctx::dothread, fatal_exit(), libworker::is_bg_thread, libworker_dobg(), libworker_setup(), ub_ctx::qq_pipe, ub_ctx::rr_pipe, libworker::thread_num, tube_close_read(), tube_close_write(), UB_FORKFAIL, UB_NOERROR, and UB_NOMEM.
Referenced by ub_resolve_async().
void libworker_enter_result | ( | struct ub_result * | res, |
ldns_buffer * | buf, | ||
struct regional * | temp, | ||
enum sec_status | msg_security | ||
) |
fill result from parsed message, on error fills servfail
res,: | is clear at start, filled in at end. |
buf,: | contains DNS message. |
temp,: | temporary buffer for parse. |
msg_security,: | security status of the DNS message. On error, the res may contain a different status (out of memory is not secure, not bogus). |
References ub_result::bogus, ub_result::data, fill_res(), reply_info::flags, FLAGS_GET_RCODE, ub_result::havedata, log_err(), ub_result::nxdomain, parse_reply(), ub_result::rcode, reply_find_answer_rrset(), reply_find_final_cname_target(), sec_status_bogus, sec_status_secure, and ub_result::secure.
Referenced by libworker_fillup_fg(), and process_answer_detail().
int libworker_fg | ( | struct ub_ctx * | ctx, |
struct ctx_query * | q | ||
) |
Create a foreground worker.
This worker will join the threadpool of resolver threads. It exits when the query answer has been obtained (or error). This routine blocks until the worker is finished.
ctx,: | new allocation cache obtained and returned to it. |
q,: | query (result is stored in here). |
References libworker::back, libworker::base, BIT_RD, comm_base_dispatch(), libworker::env, libworker_delete(), libworker_fillup_fg(), libworker_setup(), ub_ctx::local_zones, local_zones_answer(), module_env::mesh, mesh_new_callback(), query_info::qname, regional_free_all(), module_env::scratch, sec_status_insecure, setup_qinfo_edns(), UB_INITFAIL, UB_NOERROR, UB_NOMEM, UB_SYNTAX, outside_network::udp_buff, and ctx_query::w.
Referenced by ub_resolve().
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, | ||
struct sockaddr_storage * | addr, | ||
socklen_t | addrlen, | ||
uint8_t * | zone, | ||
size_t | zonelen, | ||
struct module_qstate * | q | ||
) | [read] |
Worker service routine to send serviced queries to authoritative servers.
qname,: | query name. (host order) |
qnamelen,: | length in bytes of qname, including trailing 0. |
qtype,: | query type. (host order) |
qclass,: | query class. (host order) |
flags,: | host order flags word, with opcode and CD bit. |
dnssec,: | if set, EDNS record will have DO bit set. |
want_dnssec,: | signatures needed. |
addr,: | where to. |
addrlen,: | length of addr. |
zone,: | delegation point name. |
zonelen,: | length of zone name wireformat dname. |
q,: | wich query state to reactivate upon return. |
References libworker::back, module_env::cfg, module_qstate::env, outbound_entry_compare(), outnet_serviced_query(), module_qstate::region, regional_alloc(), config_file::ssl_upstream, config_file::tcp_upstream, outside_network::udp_buff, and module_env::worker.