Method process_hostdb_info

src/proxy/http/HttpSM.cc:2299–2348

}

void
HttpSM::process_hostdb_info(HostDBRecord *record)
{
  t_state.dns_info.record = record; // protect record.

  bool use_client_addr = t_state.http_config_param->use_client_target_addr == 1 && t_state.client_info.is_transparent &&
                         t_state.dns_info.os_addr_style == ResolveInfo::OS_Addr::TRY_DEFAULT;

  t_state.dns_info.set_active(nullptr);

  if (use_client_addr) {
    NetVConnection *vc = _ua.get_txn() ? _ua.get_txn()->get_netvc() : nullptr;
    if (vc) {
      t_state.dns_info.set_upstream_address(vc->get_local_addr());
      t_state.dns_info.os_addr_style = ResolveInfo::OS_Addr::TRY_CLIENT;
    }
  }

  if (record && !record->is_failed()) {
    t_state.dns_info.inbound_remote_addr = &t_state.client_info.src_addr.sa;
    if (!use_client_addr) {
      t_state.dns_info.set_active(
        record->select_best_http(ts_clock::now(), t_state.txn_conf->down_server_timeout, t_state.dns_info.inbound_remote_addr));
    } else {
      // if use_client_target_addr is set, make sure the client addr is in the results pool
      t_state.dns_info.cta_validated_p = true;
      t_state.dns_info.record          = record; // Cache this but do not make it active.
      if (record->find(t_state.dns_info.addr) == nullptr) {
        SMDbg(dbg_ctl_http, "use_client_target_addr == 1. Client specified address is not in the pool, not validated.");
        t_state.dns_info.cta_validated_p = false;
      }
    }
  } else {
    SMDbg(dbg_ctl_http, "DNS lookup failed for '%s'", t_state.dns_info.lookup_name);
  }

  if (!t_state.dns_info.resolved_p) {
    SMDbg(dbg_ctl_http, "[%" PRId64 "] resolution failed for '%s'", sm_id, t_state.dns_info.lookup_name);
  }

  ATS_PROBE1(milestone_dns_lookup_end, sm_id);
  milestones[TS_MILESTONE_DNS_LOOKUP_END] = ink_get_hrtime();

  if (dbg_ctl_http_timeout.on()) {
    if (t_state.api_txn_dns_timeout_value != -1) {
      int foo = static_cast<int>(milestones.difference_msec(TS_MILESTONE_DNS_LOOKUP_BEGIN, TS_MILESTONE_DNS_LOOKUP_END));
      SMDbg(dbg_ctl_http_timeout, "DNS took: %d msec", foo);
    }
  }
}

int
HttpSM::state_pre_resolve(int event, void * /* data ATS_UNUSED */)