16501074822

Committed 24 Jul 2025 03:25PM UTC coverage: 65.834% (-0.006%) from 65.84%

Build # 16501074822

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Commit Message

Merge pull request #15917 from rgacogne/ddist-early-return-empty-chains

dnsdist: Return early when a rule chain is empty

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61.16

/modules/pipebackend/pipebackend.cc

/*
 * This file is part of PowerDNS or dnsdist.
 * Copyright -- PowerDNS.COM B.V. and its contributors
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * In addition, for the avoidance of any doubt, permission is granted to
 * link this program with OpenSSL and to (re)distribute the binaries
 * produced as the result of such linking.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string>
#include <map>
#include <unistd.h>
#include <stdlib.h>
#include <sstream>
#include "coprocess.hh"

#include "pdns/namespaces.hh"

#include "pdns/dns.hh"
#include "pdns/dnsbackend.hh"
#include "pdns/dnspacket.hh"
#include "pdns/pdnsexception.hh"
#include "pdns/logger.hh"
#include "pdns/arguments.hh"
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "pipebackend.hh"

// The following requirement guarantees UnknownDomainID will get output as "-1"
// for compatibility.
static_assert(std::is_signed<domainid_t>::value);

static const char* kBackendId = "[PIPEBackend]";

CoWrapper::CoWrapper(const string& command, int timeout, int abiVersion)
{
  d_command = command;
  d_timeout = timeout;
  d_abiVersion = abiVersion;
  launch(); // let exceptions fall through - if initial launch fails, we want to die
  // I think
}

CoWrapper::~CoWrapper() = default;

void CoWrapper::launch()
{
  if (d_cp)
    return;

  if (d_command.empty())
    throw ArgException("pipe-command is not specified");

  if (isUnixSocket(d_command)) {
    d_cp = std::make_unique<UnixRemote>(d_command);
  }
  else {
    auto coprocess = std::make_unique<CoProcess>(d_command, d_timeout);
    coprocess->launch();
    d_cp = std::move(coprocess);
  }

  d_cp->send("HELO\t" + std::to_string(d_abiVersion));
  string banner;
  d_cp->receive(banner);
  g_log << Logger::Error << "Backend launched with banner: " << banner << endl;
}

void CoWrapper::send(const string& line)
{
  launch();
  try {
    d_cp->send(line);
    return;
  }
  catch (PDNSException& ae) {
    d_cp.reset();
    throw;
  }
}
void CoWrapper::receive(string& line)
{
  launch();
  try {
    d_cp->receive(line);
    return;
  }
  catch (PDNSException& ae) {
    g_log << Logger::Warning << kBackendId << " Unable to receive data from coprocess. " << ae.reason << endl;
    d_cp.reset();
    throw;
  }
}

PipeBackend::PipeBackend(const string& suffix)
{
  d_disavow = false;
  signal(SIGCHLD, SIG_IGN);
  setArgPrefix("pipe" + suffix);
  try {
    launch();
  }
  catch (const ArgException& A) {
    g_log << Logger::Error << kBackendId << " Unable to launch, fatal argument error: " << A.reason << endl;
    throw;
  }
  catch (...) {
    throw;
  }
}

void PipeBackend::launch()
{
  if (d_coproc)
    return;

  try {
    if (!getArg("regex").empty()) {
      d_regex = std::make_unique<Regex>(getArg("regex"));
    }
    d_regexstr = getArg("regex");
    d_abiVersion = getArgAsNum("abi-version");
    d_coproc = std::make_unique<CoWrapper>(getArg("command"), getArgAsNum("timeout"), getArgAsNum("abi-version"));
  }

  catch (const ArgException& A) {
    cleanup();
    throw;
  }
}

/*
 * Cleans up the co-process wrapper
 */
void PipeBackend::cleanup()
{
  d_coproc.reset(nullptr);
  d_regex.reset();
  d_regexstr = string();
  d_abiVersion = 0;
}

void PipeBackend::lookup(const QType& qtype, const DNSName& qname, domainid_t zoneId, DNSPacket* pkt_p)
{
  try {
    launch();
    d_disavow = false;
    if (d_regex && !d_regex->match(qname.toStringRootDot())) {
      if (::arg().mustDo("query-logging"))
        g_log << Logger::Error << "Query for '" << qname << "' failed regex '" << d_regexstr << "'" << endl;
      d_disavow = true; // don't pass to backend
    }
    else {
      ostringstream query;
      string localIP = "0.0.0.0";
      string remoteIP = "0.0.0.0";
      Netmask realRemote("0.0.0.0/0");
      if (pkt_p) {
        localIP = pkt_p->getLocal().toString();
        realRemote = pkt_p->getRealRemote();
        remoteIP = pkt_p->getInnerRemote().toString();
      }
      // abi-version = 1
      // type    qname           qclass  qtype   id      remote-ip-address
      query << "Q\t" << qname.toStringRootDot() << "\tIN\t" << qtype.toString() << "\t" << zoneId << "\t" << remoteIP;

      // add the local-ip-address if abi-version is set to 2
      if (d_abiVersion >= 2)
        query << "\t" << localIP;
      if (d_abiVersion >= 3)
        query << "\t" << realRemote.toString();

      if (::arg().mustDo("query-logging"))
        g_log << Logger::Error << "Query: '" << query.str() << "'" << endl;
      d_coproc->send(query.str());
    }
  }
  catch (PDNSException& pe) {
    g_log << Logger::Error << kBackendId << " Error from coprocess: " << pe.reason << endl;
    d_disavow = true;
  }
  d_qtype = qtype;
  d_qname = qname;
}

bool PipeBackend::list(const ZoneName& target, domainid_t domain_id, bool /* include_disabled */)
{
  try {
    launch();
    d_disavow = false;
    ostringstream query;
    // The question format:

    // type    qname           qclass  qtype   id      ip-address
    if (d_abiVersion >= 4)
      query << "AXFR\t" << domain_id << "\t" << target.toStringRootDot();
    else
      query << "AXFR\t" << domain_id;

    d_coproc->send(query.str());
  }
  catch (PDNSException& ae) {
    g_log << Logger::Error << kBackendId << " Error from coprocess: " << ae.reason << endl;
  }
  d_qname = DNSName(std::to_string(domain_id)); // why do we store a number here??
  return true;
}

string PipeBackend::directBackendCmd(const string& query)
{
  if (d_abiVersion < 5)
    return "not supported on ABI version " + std::to_string(d_abiVersion) + " (use ABI version 5 or later)\n";

  try {
    launch();
    ostringstream oss;
    oss << "CMD\t" << query;
    d_coproc->send(oss.str());
  }
  catch (PDNSException& ae) {
    g_log << Logger::Error << kBackendId << " Error from coprocess: " << ae.reason << endl;
    cleanup();
  }

  ostringstream oss;
  while (true) {
    string line;
    d_coproc->receive(line);
    if (line == "END")
      break;
    oss << line << std::endl;
  };

  return oss.str();
}

//! For the dynamic loader
DNSBackend* PipeBackend::maker()
{
  try {
    return new PipeBackend();
  }
  catch (...) {
    g_log << Logger::Error << kBackendId << " Unable to instantiate a pipebackend!" << endl;
    return nullptr;
  }
}

PipeBackend::~PipeBackend()
{
  cleanup();
}

bool PipeBackend::get(DNSResourceRecord& r)
{
  if (d_disavow) // this query has been blocked
    return false;

  string line;

  // The answer format:
  // DATA    qname           qclass  qtype   ttl     id      content
  unsigned int extraFields = 0;
  if (d_abiVersion >= 3)
    extraFields = 2;

  try {
    launch();
    for (;;) {
      d_coproc->receive(line);
      vector<string> parts;
      stringtok(parts, line, "\t");
      if (parts.empty()) {
        g_log << Logger::Error << kBackendId << " Coprocess returned empty line in query for " << d_qname << endl;
        throw PDNSException("Format error communicating with coprocess");
      }
      else if (parts[0] == "FAIL") {
        throw DBException("coprocess returned a FAIL");
      }
      else if (parts[0] == "END") {
        return false;
      }
      else if (parts[0] == "LOG") {
        g_log << Logger::Error << "Coprocess: " << line.substr(4) << endl;
        continue;
      }
      else if (parts[0] == "DATA") { // yay
        if (parts.size() < 7 + extraFields) {
          g_log << Logger::Error << kBackendId << " Coprocess returned incomplete or empty line in data section for query for " << d_qname << endl;
          throw PDNSException("Format error communicating with coprocess in data section");
          // now what?
        }

        if (d_abiVersion >= 3) {
          r.scopeMask = std::stoi(parts[1]);
          r.auth = (parts[2] == "1");
        }
        else {
          r.scopeMask = 0;
          r.auth = true;
        }
        r.qname = DNSName(parts[1 + extraFields]);
        r.qtype = parts[3 + extraFields];
        pdns::checked_stoi_into(r.ttl, parts[4 + extraFields]);
        pdns::checked_stoi_into(r.domain_id, parts[5 + extraFields]);

        if (r.qtype.getCode() != QType::MX && r.qtype.getCode() != QType::SRV) {
          r.content.clear();
          for (unsigned int n = 6 + extraFields; n < parts.size(); ++n) {
            if (n != 6 + extraFields)
              r.content.append(1, ' ');
            r.content.append(parts[n]);
          }
        }
        else {
          if (parts.size() < 8 + extraFields) {
            g_log << Logger::Error << kBackendId << " Coprocess returned incomplete MX/SRV line in data section for query for " << d_qname << endl;
            throw PDNSException("Format error communicating with coprocess in data section of MX/SRV record");
          }

          r.content = parts[6 + extraFields] + " " + parts[7 + extraFields];
        }
        break;
      }
      else
        throw PDNSException("Coprocess backend sent incorrect response '" + line + "'");
    }
  }
  catch (DBException& dbe) {
    g_log << Logger::Error << kBackendId << " " << dbe.reason << endl;
    throw;
  }
  catch (PDNSException& pe) {
    g_log << Logger::Error << kBackendId << " " << pe.reason << endl;
    cleanup();
    throw;
  }
  return true;
}

//
// Magic class that is activated when the dynamic library is loaded
//

class PipeFactory : public BackendFactory
{
public:
  PipeFactory() :
    BackendFactory("pipe") {}

  void declareArguments(const string& suffix = "") override
  {
    declare(suffix, "command", "Command to execute for piping questions to", "");
    declare(suffix, "timeout", "Number of milliseconds to wait for an answer", "2000");
    declare(suffix, "regex", "Regular expression of queries to pass to coprocess", "");
    declare(suffix, "abi-version", "Version of the pipe backend ABI", "1");
  }

  DNSBackend* make(const string& suffix = "") override
  {
    return new PipeBackend(suffix);
  }
};

class PipeLoader
{
public:
  PipeLoader()
  {
    BackendMakers().report(std::make_unique<PipeFactory>());
    g_log << Logger::Info << kBackendId << " This is the pipe backend version " VERSION
#ifndef REPRODUCIBLE
          << " (" __DATE__ " " __TIME__ ")"
#endif
          << " reporting" << endl;
  }
};

static PipeLoader pipeloader;

1	/*
2	* This file is part of PowerDNS or dnsdist.
3	* Copyright -- PowerDNS.COM B.V. and its contributors
4	*
5	* This program is free software; you can redistribute it and/or modify
6	* it under the terms of version 2 of the GNU General Public License as
7	* published by the Free Software Foundation.
8	*
9	* In addition, for the avoidance of any doubt, permission is granted to
10	* link this program with OpenSSL and to (re)distribute the binaries
11	* produced as the result of such linking.
12	*
13	* This program is distributed in the hope that it will be useful,
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	* GNU General Public License for more details.
17	*
18	* You should have received a copy of the GNU General Public License
19	* along with this program; if not, write to the Free Software
20	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21	*/
22	#ifdef HAVE_CONFIG_H
23	#include "config.h"
24	#endif
25	#include <string>
26	#include <map>
27	#include <unistd.h>
28	#include <stdlib.h>
29	#include <sstream>
30	#include "coprocess.hh"
31
32	#include "pdns/namespaces.hh"
33
34	#include "pdns/dns.hh"
35	#include "pdns/dnsbackend.hh"
36	#include "pdns/dnspacket.hh"
37	#include "pdns/pdnsexception.hh"
38	#include "pdns/logger.hh"
39	#include "pdns/arguments.hh"
40	#include <sys/socket.h>
41	#include <netinet/in.h>
42	#include <arpa/inet.h>
43	#include "pipebackend.hh"
44
45	// The following requirement guarantees UnknownDomainID will get output as "-1"
46	// for compatibility.
47	static_assert(std::is_signed<domainid_t>::value);
48
49	static const char* kBackendId = "[PIPEBackend]";
50
51	CoWrapper::CoWrapper(const string& command, int timeout, int abiVersion)
52	{	10✔
53	d_command = command;	10✔
54	d_timeout = timeout;	10✔
55	d_abiVersion = abiVersion;	10✔
56	launch(); // let exceptions fall through - if initial launch fails, we want to die	10✔
57	// I think
58	}	10✔
59
60	CoWrapper::~CoWrapper() = default;	2✔
61
62	void CoWrapper::launch()
63	{	54✔
64	if (d_cp)	54✔
65	return;	44✔
66
67	if (d_command.empty())	10!
68	throw ArgException("pipe-command is not specified");	×
69
70	if (isUnixSocket(d_command)) {	10!
71	d_cp = std::make_unique<UnixRemote>(d_command);	×
72	}	×
73	else {	10✔
74	auto coprocess = std::make_unique<CoProcess>(d_command, d_timeout);	10✔
75	coprocess->launch();	10✔
76	d_cp = std::move(coprocess);	10✔
77	}	10✔
78
79	d_cp->send("HELO\t" + std::to_string(d_abiVersion));	10✔
80	string banner;	10✔
81	d_cp->receive(banner);	10✔
82	g_log << Logger::Error << "Backend launched with banner: " << banner << endl;	10✔
83	}	10✔
84
85	void CoWrapper::send(const string& line)
86	{	17✔
87	launch();	17✔
88	try {	17✔
89	d_cp->send(line);	17✔
90	return;	17✔
91	}	17✔
92	catch (PDNSException& ae) {	17✔
93	d_cp.reset();	×
94	throw;	×
95	}	×
96	}	17✔
97	void CoWrapper::receive(string& line)
98	{	27✔
99	launch();	27✔
100	try {	27✔
101	d_cp->receive(line);	27✔
102	return;	27✔
103	}	27✔
104	catch (PDNSException& ae) {	27✔
105	g_log << Logger::Warning << kBackendId << " Unable to receive data from coprocess. " << ae.reason << endl;	×
106	d_cp.reset();	×
107	throw;	×
108	}	×
109	}	27✔
110
111	PipeBackend::PipeBackend(const string& suffix)
112	{	10✔
113	d_disavow = false;	10✔
114	signal(SIGCHLD, SIG_IGN);	10✔
115	setArgPrefix("pipe" + suffix);	10✔
116	try {	10✔
117	launch();	10✔
118	}	10✔
119	catch (const ArgException& A) {	10✔
120	g_log << Logger::Error << kBackendId << " Unable to launch, fatal argument error: " << A.reason << endl;	×
121	throw;	×
122	}	×
123	catch (...) {	10✔
124	throw;	×
125	}	×
126	}	10✔
127
128	void PipeBackend::launch()
129	{	54✔
130	if (d_coproc)	54✔
131	return;	44✔
132
133	try {	10✔
134	if (!getArg("regex").empty()) {	10!
135	d_regex = std::make_unique<Regex>(getArg("regex"));	×
136	}	×
137	d_regexstr = getArg("regex");	10✔
138	d_abiVersion = getArgAsNum("abi-version");	10✔
139	d_coproc = std::make_unique<CoWrapper>(getArg("command"), getArgAsNum("timeout"), getArgAsNum("abi-version"));	10✔
140	}	10✔
141
142	catch (const ArgException& A) {	10✔
143	cleanup();	×
144	throw;	×
145	}	×
146	}	10✔
147
148	/*
149	* Cleans up the co-process wrapper
150	*/
151	void PipeBackend::cleanup()
152	{	2✔
153	d_coproc.reset(nullptr);	2✔
154	d_regex.reset();	2✔
155	d_regexstr = string();	2✔
156	d_abiVersion = 0;	2✔
157	}	2✔
158
159	void PipeBackend::lookup(const QType& qtype, const DNSName& qname, domainid_t zoneId, DNSPacket* pkt_p)
160	{	17✔
161	try {	17✔
162	launch();	17✔
163	d_disavow = false;	17✔
164	if (d_regex && !d_regex->match(qname.toStringRootDot())) {	17!
165	if (::arg().mustDo("query-logging"))	×
166	g_log << Logger::Error << "Query for '" << qname << "' failed regex '" << d_regexstr << "'" << endl;	×
167	d_disavow = true; // don't pass to backend	×
168	}	×
169	else {	17✔
170	ostringstream query;	17✔
171	string localIP = "0.0.0.0";	17✔
172	string remoteIP = "0.0.0.0";	17✔
173	Netmask realRemote("0.0.0.0/0");	17✔
174	if (pkt_p) {	17✔
175	localIP = pkt_p->getLocal().toString();	8✔
176	realRemote = pkt_p->getRealRemote();	8✔
177	remoteIP = pkt_p->getInnerRemote().toString();	8✔
178	}	8✔
179	// abi-version = 1
180	// type qname qclass qtype id remote-ip-address
181	query << "Q\t" << qname.toStringRootDot() << "\tIN\t" << qtype.toString() << "\t" << zoneId << "\t" << remoteIP;	17✔
182
183	// add the local-ip-address if abi-version is set to 2
184	if (d_abiVersion >= 2)	17✔
185	query << "\t" << localIP;	13✔
186	if (d_abiVersion >= 3)	17✔
187	query << "\t" << realRemote.toString();	13✔
188
189	if (::arg().mustDo("query-logging"))	17!
190	g_log << Logger::Error << "Query: '" << query.str() << "'" << endl;	×
191	d_coproc->send(query.str());	17✔
192	}	17✔
193	}	17✔
194	catch (PDNSException& pe) {	17✔
195	g_log << Logger::Error << kBackendId << " Error from coprocess: " << pe.reason << endl;	×
196	d_disavow = true;	×
197	}	×
198	d_qtype = qtype;	17✔
199	d_qname = qname;	17✔
200	}	17✔
201
202	bool PipeBackend::list(const ZoneName& target, domainid_t domain_id, bool /* include_disabled */)
203	{	×
204	try {	×
205	launch();	×
206	d_disavow = false;	×
207	ostringstream query;	×
208	// The question format:
209
210	// type qname qclass qtype id ip-address
211	if (d_abiVersion >= 4)	×
212	query << "AXFR\t" << domain_id << "\t" << target.toStringRootDot();	×
213	else	×
214	query << "AXFR\t" << domain_id;	×
215
216	d_coproc->send(query.str());	×
217	}	×
218	catch (PDNSException& ae) {	×
219	g_log << Logger::Error << kBackendId << " Error from coprocess: " << ae.reason << endl;	×
220	}	×
221	d_qname = DNSName(std::to_string(domain_id)); // why do we store a number here??	×
222	return true;	×
223	}	×
224
225	string PipeBackend::directBackendCmd(const string& query)
226	{	×
227	if (d_abiVersion < 5)	×
228	return "not supported on ABI version " + std::to_string(d_abiVersion) + " (use ABI version 5 or later)\n";	×
229
230	try {	×
231	launch();	×
232	ostringstream oss;	×
233	oss << "CMD\t" << query;	×
234	d_coproc->send(oss.str());	×
235	}	×
236	catch (PDNSException& ae) {	×
237	g_log << Logger::Error << kBackendId << " Error from coprocess: " << ae.reason << endl;	×
238	cleanup();	×
239	}	×
240
241	ostringstream oss;	×
242	while (true) {	×
243	string line;	×
244	d_coproc->receive(line);	×
245	if (line == "END")	×
246	break;	×
247	oss << line << std::endl;	×
248	};	×
249
250	return oss.str();	×
251	}	×
252
253	//! For the dynamic loader
254	DNSBackend* PipeBackend::maker()
255	{	×
256	try {	×
257	return new PipeBackend();	×
258	}	×
259	catch (...) {	×
260	g_log << Logger::Error << kBackendId << " Unable to instantiate a pipebackend!" << endl;	×
261	return nullptr;	×
262	}	×
263	}	×
264
265	PipeBackend::~PipeBackend()
266	{	2✔
267	cleanup();	2✔
268	}	2✔
269
270	bool PipeBackend::get(DNSResourceRecord& r)
271	{	27✔
272	if (d_disavow) // this query has been blocked	27!
273	return false;	×
274
275	string line;	27✔
276
277	// The answer format:
278	// DATA qname qclass qtype ttl id content
279	unsigned int extraFields = 0;	27✔
280	if (d_abiVersion >= 3)	27✔
281	extraFields = 2;	21✔
282
283	try {	27✔
284	launch();	27✔
285	for (;;) {	27✔
286	d_coproc->receive(line);	27✔
287	vector<string> parts;	27✔
288	stringtok(parts, line, "\t");	27✔
289	if (parts.empty()) {	27!
290	g_log << Logger::Error << kBackendId << " Coprocess returned empty line in query for " << d_qname << endl;	×
291	throw PDNSException("Format error communicating with coprocess");	×
292	}	×
293	else if (parts[0] == "FAIL") {	27!
294	throw DBException("coprocess returned a FAIL");	×
295	}	×
296	else if (parts[0] == "END") {	27✔
297	return false;	17✔
298	}	17✔
299	else if (parts[0] == "LOG") {	10!
300	g_log << Logger::Error << "Coprocess: " << line.substr(4) << endl;	×
301	continue;	×
302	}	×
303	else if (parts[0] == "DATA") { // yay	10!
304	if (parts.size() < 7 + extraFields) {	10!
305	g_log << Logger::Error << kBackendId << " Coprocess returned incomplete or empty line in data section for query for " << d_qname << endl;	×
306	throw PDNSException("Format error communicating with coprocess in data section");	×
307	// now what?
308	}	×
309
310	if (d_abiVersion >= 3) {	10✔
311	r.scopeMask = std::stoi(parts[1]);	8✔
312	r.auth = (parts[2] == "1");	8✔
313	}	8✔
314	else {	2✔
315	r.scopeMask = 0;	2✔
316	r.auth = true;	2✔
317	}	2✔
318	r.qname = DNSName(parts[1 + extraFields]);	10✔
319	r.qtype = parts[3 + extraFields];	10✔
320	pdns::checked_stoi_into(r.ttl, parts[4 + extraFields]);	10✔
321	pdns::checked_stoi_into(r.domain_id, parts[5 + extraFields]);	10✔
322
323	if (r.qtype.getCode() != QType::MX && r.qtype.getCode() != QType::SRV) {	10!
324	r.content.clear();	9✔
325	for (unsigned int n = 6 + extraFields; n < parts.size(); ++n) {	18✔
326	if (n != 6 + extraFields)	9!
327	r.content.append(1, ' ');	×
328	r.content.append(parts[n]);	9✔
329	}	9✔
330	}	9✔
331	else {	1✔
332	if (parts.size() < 8 + extraFields) {	1!
333	g_log << Logger::Error << kBackendId << " Coprocess returned incomplete MX/SRV line in data section for query for " << d_qname << endl;	×
334	throw PDNSException("Format error communicating with coprocess in data section of MX/SRV record");	×
335	}	×
336
337	r.content = parts[6 + extraFields] + " " + parts[7 + extraFields];	1✔
338	}	1✔
339	break;	10✔
340	}	10✔
UNCOV 341	else	×
UNCOV 342	throw PDNSException("Coprocess backend sent incorrect response '" + line + "'");	×
343	}	27✔
344	}	27✔
345	catch (DBException& dbe) {	27✔
346	g_log << Logger::Error << kBackendId << " " << dbe.reason << endl;	×
347	throw;	×
348	}	×
349	catch (PDNSException& pe) {	27✔
350	g_log << Logger::Error << kBackendId << " " << pe.reason << endl;	×
351	cleanup();	×
352	throw;	×
353	}	×
354	return true;	10✔
355	}	27✔
356
357	//
358	// Magic class that is activated when the dynamic library is loaded
359	//
360
361	class PipeFactory : public BackendFactory
362	{
363	public:
364	PipeFactory() :
365	BackendFactory("pipe") {}	5,854✔
366
367	void declareArguments(const string& suffix = "") override
368	{	2✔
369	declare(suffix, "command", "Command to execute for piping questions to", "");	2✔
370	declare(suffix, "timeout", "Number of milliseconds to wait for an answer", "2000");	2✔
371	declare(suffix, "regex", "Regular expression of queries to pass to coprocess", "");	2✔
372	declare(suffix, "abi-version", "Version of the pipe backend ABI", "1");	2✔
373	}	2✔
374
375	DNSBackend* make(const string& suffix = "") override
376	{	10✔
377	return new PipeBackend(suffix);	10✔
378	}	10✔
379	};
380
381	class PipeLoader
382	{
383	public:
384	PipeLoader()
385	{	5,854✔
386	BackendMakers().report(std::make_unique<PipeFactory>());	5,854✔
387	g_log << Logger::Info << kBackendId << " This is the pipe backend version " VERSION	5,854✔
388	#ifndef REPRODUCIBLE	5,854✔
389	<< " (" __DATE__ " " __TIME__ ")"	5,854✔
390	#endif	5,854✔
391	<< " reporting" << endl;	5,854✔
392	}	5,854✔
393	};
394
395	static PipeLoader pipeloader;

PowerDNS / pdns / 16501074822

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