/mandos/release : revision 237.16.8

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* "browse_callback", and parts of "main".

10

*

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* Everything else is

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*

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* This program is free software: you can redistribute it and/or

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* modify it under the terms of the GNU General Public License as

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* along with this program. If not, see

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* <http://www.gnu.org/licenses/>.

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*

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* Contact the authors at <mandos@fukt.bsnet.se>.

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* Contact the authors at <mandos@recompile.se>.

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*/

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32

/* Needed by GPGME, specifically gpgme_data_seek() */

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sockaddr_in6, PF_INET6,

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SOCK_STREAM, uid_t, gid_t, open(),

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opendir(), DIR */

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#include <sys/stat.h> /* open() */

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#include <sys/stat.h> /* open(), S_ISREG */

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#include <sys/socket.h> /* socket(), struct sockaddr_in6,

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inet_pton(), connect() */

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#include <fcntl.h> /* open() */

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#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,

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strtoimax() */

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#include <assert.h> /* assert() */

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#include <errno.h> /* perror(), errno */

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#include <errno.h> /* perror(), errno,

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program_invocation_short_name */

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#include <time.h> /* nanosleep(), time(), sleep() */

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#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,

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SIOCSIFFLAGS, if_indextoname(),

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#include <unistd.h> /* close(), SEEK_SET, off_t, write(),

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getuid(), getgid(), seteuid(),

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setgid(), pause() */

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#include <arpa/inet.h> /* inet_pton(), htons */

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#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */

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#include <iso646.h> /* not, or, and */

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79

#include <argp.h> /* struct argp_option, error_t, struct

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argp_state, struct argp,

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raise() */

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86

#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,

86

87

EX_NOHOST, EX_IOERR, EX_PROTOCOL */

88

#include <sys/wait.h> /* waitpid(), WIFEXITED(),

89

WEXITSTATUS(), WTERMSIG() */

87

90

88

91

#ifdef __linux__

89

92

#include <sys/klog.h> /* klogctl() */

107

110

init_gnutls_session(),

108

111

GNUTLS_* */

109

112

#include <gnutls/openpgp.h>

110

/* gnutls_certificate_set_openpgp_key_file(),

111

GNUTLS_OPENPGP_FMT_BASE64 */

113

/* gnutls_certificate_set_openpgp_key_file(),

114

GNUTLS_OPENPGP_FMT_BASE64 */

112

115

113

116

/* GPGME */

114

117

#include <gpgme.h> /* All GPGME types, constants and

122

125

#define PATHDIR "/conf/conf.d/mandos"

123

126

#define SECKEY "seckey.txt"

124

127

#define PUBKEY "pubkey.txt"

128

#define HOOKDIR "/lib/mandos/network-hooks.d"

125

129

126

130

bool debug = false;

127

131

static const char mandos_protocol_version[] = "1";

128

132

const char *argp_program_version = "mandos-client " VERSION;

129

const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";

133

const char *argp_program_bug_address = "<mandos@recompile.se>";

130

134

static const char sys_class_net[] = "/sys/class/net";

131

135

char *connect_to = NULL;

136

const char *hookdir = HOOKDIR;

137

138

/* Doubly linked list that need to be circularly linked when used */

139

typedef struct server{

140

const char *ip;

141

uint16_t port;

142

AvahiIfIndex if_index;

143

int af;

144

struct timespec last_seen;

145

struct server *next;

146

struct server *prev;

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} server;

132

148

133

149

/* Used for passing in values through the Avahi callback functions */

134

150

typedef struct {

139

155

gnutls_dh_params_t dh_params;

140

156

const char *priority;

141

157

gpgme_ctx_t ctx;

158

server *current_server;

142

159

} mandos_context;

143

160

144

161

/* global context so signal handler can reach it*/

145

162

mandos_context mc = { .simple_poll = NULL, .server = NULL,

146

163

.dh_bits = 1024, .priority = "SECURE256"

147

":!CTYPE-X.509:+CTYPE-OPENPGP" };

164

":!CTYPE-X.509:+CTYPE-OPENPGP",

165

.current_server = NULL };

148

166

149

167

sig_atomic_t quit_now = 0;

150

168

int signal_received = 0;

151

169

170

/* Function to use when printing errors */

171

void perror_plus(const char *print_text){

172

fprintf(stderr, "Mandos plugin %s: ",

173

program_invocation_short_name);

174

perror(print_text);

175

}

176

152

177

/*

153

178

* Make additional room in "buffer" for at least BUFFER_SIZE more

154

179

* bytes. "buffer_capacity" is how much is currently allocated,

155

180

* "buffer_length" is how much is already used.

156

181

*/

157

182

size_t incbuffer(char **buffer, size_t buffer_length,

158

size_t buffer_capacity){

183

size_t buffer_capacity){

159

184

if(buffer_length + BUFFER_SIZE > buffer_capacity){

160

185

*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);

161

186

if(buffer == NULL){

166

191

return buffer_capacity;

167

192

}

168

193

194

/* Add server to set of servers to retry periodically */

195

int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,

196

int af){

197

int ret;

198

server *new_server = malloc(sizeof(server));

199

if(new_server == NULL){

200

perror_plus("malloc");

201

return -1;

202

}

203

*new_server = (server){ .ip = strdup(ip),

204

.port = port,

205

.if_index = if_index,

206

.af = af };

207

if(new_server->ip == NULL){

208

perror_plus("strdup");

209

return -1;

210

}

211

/* Special case of first server */

212

if (mc.current_server == NULL){

213

new_server->next = new_server;

214

new_server->prev = new_server;

215

mc.current_server = new_server;

216

/* Place the new server last in the list */

217

} else {

218

new_server->next = mc.current_server;

219

new_server->prev = mc.current_server->prev;

220

new_server->prev->next = new_server;

221

mc.current_server->prev = new_server;

222

}

223

ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);

224

if(ret == -1){

225

perror_plus("clock_gettime");

226

return -1;

227

}

228

return 0;

229

}

230

169

231

/*

170

232

* Initialize GPGME.

171

233

*/

172

static bool init_gpgme(const char *seckey,

173

const char *pubkey, const char *tempdir){

234

static bool init_gpgme(const char *seckey, const char *pubkey,

235

const char *tempdir){

174

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gpgme_error_t rc;

175

237

gpgme_engine_info_t engine_info;

176

238

185

247

186

248

fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));

187

249

if(fd == -1){

188

perror("open");

250

perror_plus("open");

189

251

return false;

190

252

}

191

253

192

254

rc = gpgme_data_new_from_fd(&pgp_data, fd);

193

255

if(rc != GPG_ERR_NO_ERROR){

194

fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",

256

fprintf(stderr, "Mandos plugin mandos-client: "

257

"bad gpgme_data_new_from_fd: %s: %s\n",

195

258

gpgme_strsource(rc), gpgme_strerror(rc));

196

259

return false;

197

260

}

198

261

199

262

rc = gpgme_op_import(mc.ctx, pgp_data);

200

263

if(rc != GPG_ERR_NO_ERROR){

201

fprintf(stderr, "bad gpgme_op_import: %s: %s\n",

264

fprintf(stderr, "Mandos plugin mandos-client: "

265

"bad gpgme_op_import: %s: %s\n",

202

266

gpgme_strsource(rc), gpgme_strerror(rc));

203

267

return false;

204

268

}

205

269

206

270

ret = (int)TEMP_FAILURE_RETRY(close(fd));

207

271

if(ret == -1){

208

perror("close");

272

perror_plus("close");

209

273

}

210

274

gpgme_data_release(pgp_data);

211

275

return true;

212

276

}

213

277

214

278

if(debug){

215

fprintf(stderr, "Initializing GPGME\n");

279

fprintf(stderr, "Mandos plugin mandos-client: "

280

"Initializing GPGME\n");

216

281

}

217

282

218

283

/* Init GPGME */

219

284

gpgme_check_version(NULL);

220

285

rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

221

286

if(rc != GPG_ERR_NO_ERROR){

222

fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",

287

fprintf(stderr, "Mandos plugin mandos-client: "

288

"bad gpgme_engine_check_version: %s: %s\n",

223

289

gpgme_strsource(rc), gpgme_strerror(rc));

224

290

return false;

225

291

}

226

292

227

/* Set GPGME home directory for the OpenPGP engine only */

293

/* Set GPGME home directory for the OpenPGP engine only */

228

294

rc = gpgme_get_engine_info(&engine_info);

229

295

if(rc != GPG_ERR_NO_ERROR){

230

fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",

296

fprintf(stderr, "Mandos plugin mandos-client: "

297

"bad gpgme_get_engine_info: %s: %s\n",

231

298

gpgme_strsource(rc), gpgme_strerror(rc));

232

299

return false;

233

300

}

240

307

engine_info = engine_info->next;

241

308

}

242

309

if(engine_info == NULL){

243

fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);

310

fprintf(stderr, "Mandos plugin mandos-client: "

311

"Could not set GPGME home dir to %s\n", tempdir);

244

312

return false;

245

313

}

246

314

247

315

/* Create new GPGME "context" */

248

316

rc = gpgme_new(&(mc.ctx));

249

317

if(rc != GPG_ERR_NO_ERROR){

250

fprintf(stderr, "bad gpgme_new: %s: %s\n",

251

gpgme_strsource(rc), gpgme_strerror(rc));

318

fprintf(stderr, "Mandos plugin mandos-client: "

319

"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),

320

gpgme_strerror(rc));

252

321

return false;

253

322

}

254

323

273

342

ssize_t plaintext_length = 0;

274

343

275

344

if(debug){

276

fprintf(stderr, "Trying to decrypt OpenPGP data\n");

345

fprintf(stderr, "Mandos plugin mandos-client: "

346

"Trying to decrypt OpenPGP data\n");

277

347

}

278

348

279

349

/* Create new GPGME data buffer from memory cryptotext */

280

350

rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,

281

351

0);

282

352

if(rc != GPG_ERR_NO_ERROR){

283

fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",

353

fprintf(stderr, "Mandos plugin mandos-client: "

354

"bad gpgme_data_new_from_mem: %s: %s\n",

284

355

gpgme_strsource(rc), gpgme_strerror(rc));

285

356

return -1;

286

357

}

288

359

/* Create new empty GPGME data buffer for the plaintext */

289

360

rc = gpgme_data_new(&dh_plain);

290

361

if(rc != GPG_ERR_NO_ERROR){

291

fprintf(stderr, "bad gpgme_data_new: %s: %s\n",

362

fprintf(stderr, "Mandos plugin mandos-client: "

363

"bad gpgme_data_new: %s: %s\n",

292

364

gpgme_strsource(rc), gpgme_strerror(rc));

293

365

gpgme_data_release(dh_crypto);

294

366

return -1;

298

370

data buffer */

299

371

rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);

300

372

if(rc != GPG_ERR_NO_ERROR){

301

fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",

373

fprintf(stderr, "Mandos plugin mandos-client: "

374

"bad gpgme_op_decrypt: %s: %s\n",

302

375

gpgme_strsource(rc), gpgme_strerror(rc));

303

376

plaintext_length = -1;

304

377

if(debug){

305

378

gpgme_decrypt_result_t result;

306

379

result = gpgme_op_decrypt_result(mc.ctx);

307

380

if(result == NULL){

308

fprintf(stderr, "gpgme_op_decrypt_result failed\n");

381

fprintf(stderr, "Mandos plugin mandos-client: "

382

"gpgme_op_decrypt_result failed\n");

309

383

} else {

310

fprintf(stderr, "Unsupported algorithm: %s\n",

384

fprintf(stderr, "Mandos plugin mandos-client: "

385

"Unsupported algorithm: %s\n",

311

386

result->unsupported_algorithm);

312

fprintf(stderr, "Wrong key usage: %u\n",

387

fprintf(stderr, "Mandos plugin mandos-client: "

388

"Wrong key usage: %u\n",

313

389

result->wrong_key_usage);

314

390

if(result->file_name != NULL){

315

fprintf(stderr, "File name: %s\n", result->file_name);

391

fprintf(stderr, "Mandos plugin mandos-client: "

392

"File name: %s\n", result->file_name);

316

393

}

317

394

gpgme_recipient_t recipient;

318

395

recipient = result->recipients;

319

396

while(recipient != NULL){

320

fprintf(stderr, "Public key algorithm: %s\n",

397

fprintf(stderr, "Mandos plugin mandos-client: "

398

"Public key algorithm: %s\n",

321

399

gpgme_pubkey_algo_name(recipient->pubkey_algo));

322

fprintf(stderr, "Key ID: %s\n", recipient->keyid);

323

fprintf(stderr, "Secret key available: %s\n",

400

fprintf(stderr, "Mandos plugin mandos-client: "

401

"Key ID: %s\n", recipient->keyid);

402

fprintf(stderr, "Mandos plugin mandos-client: "

403

"Secret key available: %s\n",

324

404

recipient->status == GPG_ERR_NO_SECKEY

325

405

? "No" : "Yes");

326

406

recipient = recipient->next;

331

411

}

332

412

333

413

if(debug){

334

fprintf(stderr, "Decryption of OpenPGP data succeeded\n");

414

fprintf(stderr, "Mandos plugin mandos-client: "

415

"Decryption of OpenPGP data succeeded\n");

335

416

}

336

417

337

418

/* Seek back to the beginning of the GPGME plaintext data buffer */

338

419

if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){

339

perror("gpgme_data_seek");

420

perror_plus("gpgme_data_seek");

340

421

plaintext_length = -1;

341

422

goto decrypt_end;

342

423

}

344

425

*plaintext = NULL;

345

426

while(true){

346

427

plaintext_capacity = incbuffer(plaintext,

347

(size_t)plaintext_length,

348

plaintext_capacity);

428

(size_t)plaintext_length,

429

plaintext_capacity);

349

430

if(plaintext_capacity == 0){

350

perror("incbuffer");

351

plaintext_length = -1;

352

goto decrypt_end;

431

perror_plus("incbuffer");

432

plaintext_length = -1;

433

goto decrypt_end;

353

434

}

354

435

355

436

ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,

360

441

break;

361

442

}

362

443

if(ret < 0){

363

perror("gpgme_data_read");

444

perror_plus("gpgme_data_read");

364

445

plaintext_length = -1;

365

446

goto decrypt_end;

366

447

}

368

449

}

369

450

370

451

if(debug){

371

fprintf(stderr, "Decrypted password is: ");

452

fprintf(stderr, "Mandos plugin mandos-client: "

453

"Decrypted password is: ");

372

454

for(ssize_t i = 0; i < plaintext_length; i++){

373

455

fprintf(stderr, "%02hhX ", (*plaintext)[i]);

374

456

}

396

478

/* GnuTLS log function callback */

397

479

static void debuggnutls(__attribute__((unused)) int level,

398

480

const char* string){

399

fprintf(stderr, "GnuTLS: %s", string);

481

fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);

400

482

}

401

483

402

484

static int init_gnutls_global(const char *pubkeyfilename,

404

486

int ret;

405

487

406

488

if(debug){

407

fprintf(stderr, "Initializing GnuTLS\n");

489

fprintf(stderr, "Mandos plugin mandos-client: "

490

"Initializing GnuTLS\n");

408

491

}

409

492

410

493

ret = gnutls_global_init();

411

494

if(ret != GNUTLS_E_SUCCESS){

412

fprintf(stderr, "GnuTLS global_init: %s\n",

413

safer_gnutls_strerror(ret));

495

fprintf(stderr, "Mandos plugin mandos-client: "

496

"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));

414

497

return -1;

415

498

}

416

499

423

506

}

424

507

425

508

/* OpenPGP credentials */

426

gnutls_certificate_allocate_credentials(&mc.cred);

509

ret = gnutls_certificate_allocate_credentials(&mc.cred);

427

510

if(ret != GNUTLS_E_SUCCESS){

428

fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning

429

from

430

-Wunreachable-code

431

*/

432

safer_gnutls_strerror(ret));

511

fprintf(stderr, "Mandos plugin mandos-client: "

512

"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));

433

513

gnutls_global_deinit();

434

514

return -1;

435

515

}

436

516

437

517

if(debug){

438

fprintf(stderr, "Attempting to use OpenPGP public key %s and"

518

fprintf(stderr, "Mandos plugin mandos-client: "

519

"Attempting to use OpenPGP public key %s and"

439

520

" secret key %s as GnuTLS credentials\n", pubkeyfilename,

440

521

seckeyfilename);

441

522

}

445

526

GNUTLS_OPENPGP_FMT_BASE64);

446

527

if(ret != GNUTLS_E_SUCCESS){

447

528

fprintf(stderr,

529

"Mandos plugin mandos-client: "

448

530

"Error[%d] while reading the OpenPGP key pair ('%s',"

449

531

" '%s')\n", ret, pubkeyfilename, seckeyfilename);

450

fprintf(stderr, "The GnuTLS error is: %s\n",

451

safer_gnutls_strerror(ret));

532

fprintf(stderr, "Mandos plugin mandos-client: "

533

"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));

452

534

goto globalfail;

453

535

}

454

536

455

537

/* GnuTLS server initialization */

456

538

ret = gnutls_dh_params_init(&mc.dh_params);

457

539

if(ret != GNUTLS_E_SUCCESS){

458

fprintf(stderr, "Error in GnuTLS DH parameter initialization:"

540

fprintf(stderr, "Mandos plugin mandos-client: "

541

"Error in GnuTLS DH parameter initialization:"

459

542

" %s\n", safer_gnutls_strerror(ret));

460

543

goto globalfail;

461

544

}

462

545

ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);

463

546

if(ret != GNUTLS_E_SUCCESS){

464

fprintf(stderr, "Error in GnuTLS prime generation: %s\n",

547

fprintf(stderr, "Mandos plugin mandos-client: "

548

"Error in GnuTLS prime generation: %s\n",

465

549

safer_gnutls_strerror(ret));

466

550

goto globalfail;

467

551

}

488

572

}

489

573

} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);

490

574

if(ret != GNUTLS_E_SUCCESS){

491

fprintf(stderr, "Error in GnuTLS session initialization: %s\n",

575

fprintf(stderr, "Mandos plugin mandos-client: "

576

"Error in GnuTLS session initialization: %s\n",

492

577

safer_gnutls_strerror(ret));

493

578

}

494

579

502

587

}

503

588

} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);

504

589

if(ret != GNUTLS_E_SUCCESS){

505

fprintf(stderr, "Syntax error at: %s\n", err);

506

fprintf(stderr, "GnuTLS error: %s\n",

507

safer_gnutls_strerror(ret));

590

fprintf(stderr, "Mandos plugin mandos-client: "

591

"Syntax error at: %s\n", err);

592

fprintf(stderr, "Mandos plugin mandos-client: "

593

"GnuTLS error: %s\n", safer_gnutls_strerror(ret));

508

594

gnutls_deinit(*session);

509

595

return -1;

510

596

}

519

605

}

520

606

} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);

521

607

if(ret != GNUTLS_E_SUCCESS){

522

fprintf(stderr, "Error setting GnuTLS credentials: %s\n",

608

fprintf(stderr, "Mandos plugin mandos-client: "

609

"Error setting GnuTLS credentials: %s\n",

523

610

safer_gnutls_strerror(ret));

524

611

gnutls_deinit(*session);

525

612

return -1;

571

658

pf = PF_INET;

572

659

break;

573

660

default:

574

fprintf(stderr, "Bad address family: %d\n", af);

661

fprintf(stderr, "Mandos plugin mandos-client: "

662

"Bad address family: %d\n", af);

575

663

errno = EINVAL;

576

664

return -1;

577

665

}

582

670

}

583

671

584

672

if(debug){

585

fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16

673

fprintf(stderr, "Mandos plugin mandos-client: "

674

"Setting up a TCP connection to %s, port %" PRIu16

586

675

"\n", ip, port);

587

676

}

588

677

589

678

tcp_sd = socket(pf, SOCK_STREAM, 0);

590

679

if(tcp_sd < 0){

591

680

int e = errno;

592

perror("socket");

681

perror_plus("socket");

593

682

errno = e;

594

683

goto mandos_end;

595

684

}

609

698

}

610

699

if(ret < 0 ){

611

700

int e = errno;

612

perror("inet_pton");

701

perror_plus("inet_pton");

613

702

errno = e;

614

703

goto mandos_end;

615

704

}

616

705

if(ret == 0){

617

706

int e = errno;

618

fprintf(stderr, "Bad address: %s\n", ip);

707

fprintf(stderr, "Mandos plugin mandos-client: "

708

"Bad address: %s\n", ip);

619

709

errno = e;

620

710

goto mandos_end;

621

711

}

626

716

627

717

if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */

628

718

(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and

629

-Wunreachable-code*/

719

-Wunreachable-code*/

630

720

if(if_index == AVAHI_IF_UNSPEC){

631

fprintf(stderr, "An IPv6 link-local address is incomplete"

721

fprintf(stderr, "Mandos plugin mandos-client: "

722

"An IPv6 link-local address is incomplete"

632

723

" without a network interface\n");

633

724

errno = EINVAL;

634

725

goto mandos_end;

651

742

if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){

652

743

char interface[IF_NAMESIZE];

653

744

if(if_indextoname((unsigned int)if_index, interface) == NULL){

654

perror("if_indextoname");

745

perror_plus("if_indextoname");

655

746

} else {

656

fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",

747

fprintf(stderr, "Mandos plugin mandos-client: "

748

"Connection to: %s%%%s, port %" PRIu16 "\n",

657

749

ip, interface, port);

658

750

}

659

751

} else {

660

fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,

661

port);

752

fprintf(stderr, "Mandos plugin mandos-client: "

753

"Connection to: %s, port %" PRIu16 "\n", ip, port);

662

754

}

663

755

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

664

756

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

671

763

sizeof(addrstr));

672

764

}

673

765

if(pcret == NULL){

674

perror("inet_ntop");

766

perror_plus("inet_ntop");

675

767

} else {

676

768

if(strcmp(addrstr, ip) != 0){

677

fprintf(stderr, "Canonical address form: %s\n", addrstr);

769

fprintf(stderr, "Mandos plugin mandos-client: "

770

"Canonical address form: %s\n", addrstr);

678

771

}

679

772

}

680

773

}

692

785

if(ret < 0){

693

786

if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){

694

787

int e = errno;

695

perror("connect");

788

perror_plus("connect");

696

789

errno = e;

697

790

}

698

791

goto mandos_end;

708

801

while(true){

709

802

size_t out_size = strlen(out);

710

803

ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,

711

out_size - written));

804

out_size - written));

712

805

if(ret == -1){

713

806

int e = errno;

714

perror("write");

807

perror_plus("write");

715

808

errno = e;

716

809

goto mandos_end;

717

810

}

734

827

}

735

828

736

829

if(debug){

737

fprintf(stderr, "Establishing TLS session with %s\n", ip);

830

fprintf(stderr, "Mandos plugin mandos-client: "

831

"Establishing TLS session with %s\n", ip);

738

832

}

739

833

740

834

if(quit_now){

742

836

goto mandos_end;

743

837

}

744

838

839

/* Spurious warning from -Wint-to-pointer-cast */

745

840

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

746

841

747

842

if(quit_now){

759

854

760

855

if(ret != GNUTLS_E_SUCCESS){

761

856

if(debug){

762

fprintf(stderr, "*** GnuTLS Handshake failed ***\n");

857

fprintf(stderr, "Mandos plugin mandos-client: "

858

"*** GnuTLS Handshake failed ***\n");

763

859

gnutls_perror(ret);

764

860

}

765

861

errno = EPROTO;

769

865

/* Read OpenPGP packet that contains the wanted password */

770

866

771

867

if(debug){

772

fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",

773

ip);

868

fprintf(stderr, "Mandos plugin mandos-client: "

869

"Retrieving OpenPGP encrypted password from %s\n", ip);

774

870

}

775

871

776

872

while(true){

781

877

}

782

878

783

879

buffer_capacity = incbuffer(&buffer, buffer_length,

784

buffer_capacity);

880

buffer_capacity);

785

881

if(buffer_capacity == 0){

786

882

int e = errno;

787

perror("incbuffer");

883

perror_plus("incbuffer");

788

884

errno = e;

789

885

goto mandos_end;

790

886

}

814

910

}

815

911

} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);

816

912

if(ret < 0){

817

fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");

913

fprintf(stderr, "Mandos plugin mandos-client: "

914

"*** GnuTLS Re-handshake failed ***\n");

818

915

gnutls_perror(ret);

819

916

errno = EPROTO;

820

917

goto mandos_end;

821

918

}

822

919

break;

823

920

default:

824

fprintf(stderr, "Unknown error while reading data from"

921

fprintf(stderr, "Mandos plugin mandos-client: "

922

"Unknown error while reading data from"

825

923

" encrypted session with Mandos server\n");

826

924

gnutls_bye(session, GNUTLS_SHUT_RDWR);

827

925

errno = EIO;

833

931

}

834

932

835

933

if(debug){

836

fprintf(stderr, "Closing TLS session\n");

934

fprintf(stderr, "Mandos plugin mandos-client: "

935

"Closing TLS session\n");

837

936

}

838

937

839

938

if(quit_now){

851

950

852

951

if(buffer_length > 0){

853

952

ssize_t decrypted_buffer_size;

854

decrypted_buffer_size = pgp_packet_decrypt(buffer,

855

buffer_length,

953

decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,

856

954

&decrypted_buffer);

857

955

if(decrypted_buffer_size >= 0){

858

956

869

967

if(ret == 0 and ferror(stdout)){

870

968

int e = errno;

871

969

if(debug){

872

fprintf(stderr, "Error writing encrypted data: %s\n",

970

fprintf(stderr, "Mandos plugin mandos-client: "

971

"Error writing encrypted data: %s\n",

873

972

strerror(errno));

874

973

}

875

974

errno = e;

895

994

if(e == 0){

896

995

e = errno;

897

996

}

898

perror("close");

997

perror_plus("close");

899

998

}

900

999

gnutls_deinit(session);

1000

errno = e;

901

1001

if(quit_now){

902

e = EINTR;

1002

errno = EINTR;

903

1003

retval = -1;

904

1004

}

905

errno = e;

906

1005

}

907

1006

return retval;

908

1007

}

933

1032

switch(event){

934

1033

default:

935

1034

case AVAHI_RESOLVER_FAILURE:

936

fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"

1035

fprintf(stderr, "Mandos plugin mandos-client: "

1036

"(Avahi Resolver) Failed to resolve service '%s'"

937

1037

" of type '%s' in domain '%s': %s\n", name, type, domain,

938

1038

avahi_strerror(avahi_server_errno(mc.server)));

939

1039

break;

943

1043

char ip[AVAHI_ADDRESS_STR_MAX];

944

1044

avahi_address_snprint(ip, sizeof(ip), address);

945

1045

if(debug){

946

fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"

1046

fprintf(stderr, "Mandos plugin mandos-client: "

1047

"Mandos server \"%s\" found on %s (%s, %"

947

1048

PRIdMAX ") on port %" PRIu16 "\n", name, host_name,

948

1049

ip, (intmax_t)interface, port);

949

1050

}

951

1052

avahi_proto_to_af(proto));

952

1053

if(ret == 0){

953

1054

avahi_simple_poll_quit(mc.simple_poll);

1055

} else {

1056

ret = add_server(ip, port, interface,

1057

avahi_proto_to_af(proto));

954

1058

}

955

1059

}

956

1060

}

980

1084

default:

981

1085

case AVAHI_BROWSER_FAILURE:

982

1086

983

fprintf(stderr, "(Avahi browser) %s\n",

1087

fprintf(stderr, "Mandos plugin mandos-client: "

1088

"(Avahi browser) %s\n",

984

1089

avahi_strerror(avahi_server_errno(mc.server)));

985

1090

avahi_simple_poll_quit(mc.simple_poll);

986

1091

return;

994

1099

if(avahi_s_service_resolver_new(mc.server, interface, protocol,

995

1100

name, type, domain, protocol, 0,

996

1101

resolve_callback, NULL) == NULL)

997

fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",

1102

fprintf(stderr, "Mandos plugin mandos-client: "

1103

"Avahi: Failed to resolve service '%s': %s\n",

998

1104

name, avahi_strerror(avahi_server_errno(mc.server)));

999

1105

break;

1000

1106

1004

1110

case AVAHI_BROWSER_ALL_FOR_NOW:

1005

1111

case AVAHI_BROWSER_CACHE_EXHAUSTED:

1006

1112

if(debug){

1007

fprintf(stderr, "No Mandos server found, still searching...\n");

1113

fprintf(stderr, "Mandos plugin mandos-client: "

1114

"No Mandos server found, still searching...\n");

1008

1115

}

1009

1116

break;

1010

1117

}

1011

1118

}

1012

1119

1013

/* stop main loop after sigterm has been called */

1120

/* Signal handler that stops main loop after SIGTERM */

1014

1121

static void handle_sigterm(int sig){

1015

1122

if(quit_now){

1016

1123

return;

1018

1125

quit_now = 1;

1019

1126

signal_received = sig;

1020

1127

int old_errno = errno;

1128

/* set main loop to exit */

1021

1129

if(mc.simple_poll != NULL){

1022

1130

avahi_simple_poll_quit(mc.simple_poll);

1023

1131

}

1024

1132

errno = old_errno;

1025

1133

}

1026

1134

1027

/*

1028

* This function determines if a directory entry in /sys/class/net

1029

* corresponds to an acceptable network device.

1030

* (This function is passed to scandir(3) as a filter function.)

1031

*/

1032

int good_interface(const struct dirent *if_entry){

1033

ssize_t ssret;

1034

char *flagname = NULL;

1035

int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,

1036

if_entry->d_name);

1037

if(ret < 0){

1038

perror("asprintf");

1039

return 0;

1040

}

1041

if(if_entry->d_name[0] == '.'){

1042

return 0;

1043

}

1044

int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));

1045

if(flags_fd == -1){

1046

perror("open");

1047

return 0;

1048

}

1049

typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */

1050

/* read line from flags_fd */

1051

ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */

1052

char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */

1053

flagstring[(size_t)to_read] = '\0';

1054

if(flagstring == NULL){

1055

perror("malloc");

1056

close(flags_fd);

1057

return 0;

1058

}

1059

while(to_read > 0){

1060

ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,

1061

(size_t)to_read));

1062

if(ssret == -1){

1063

perror("read");

1064

free(flagstring);

1065

close(flags_fd);

1066

return 0;

1067

}

1068

to_read -= ssret;

1069

if(ssret == 0){

1070

break;

1071

}

1072

}

1073

close(flags_fd);

1074

intmax_t tmpmax;

1075

char *tmp;

1076

errno = 0;

1077

tmpmax = strtoimax(flagstring, &tmp, 0);

1078

if(errno != 0 or tmp == flagstring or (*tmp != '\0'

1079

and not (isspace(*tmp)))

1080

or tmpmax != (ifreq_flags)tmpmax){

1135

bool get_flags(const char *ifname, struct ifreq *ifr){

1136

int ret;

1137

1138

int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1139

if(s < 0){

1140

perror_plus("socket");

1141

return false;

1142

}

1143

strcpy(ifr->ifr_name, ifname);

1144

ret = ioctl(s, SIOCGIFFLAGS, ifr);

1145

if(ret == -1){

1081

1146

if(debug){

1082

fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",

1083

flagstring, if_entry->d_name);

1147

perror_plus("ioctl SIOCGIFFLAGS");

1084

1148

}

1085

free(flagstring);

1086

return 0;

1149

return false;

1087

1150

}

1088

free(flagstring);

1089

ifreq_flags flags = (ifreq_flags)tmpmax;

1151

return true;

1152

}

1153

1154

bool good_flags(const char *ifname, const struct ifreq *ifr){

1155

1090

1156

/* Reject the loopback device */

1091

if(flags & IFF_LOOPBACK){

1157

if(ifr->ifr_flags & IFF_LOOPBACK){

1092

1158

if(debug){

1093

fprintf(stderr, "Rejecting loopback interface \"%s\"\n",

1094

if_entry->d_name);

1159

fprintf(stderr, "Mandos plugin mandos-client: "

1160

"Rejecting loopback interface \"%s\"\n", ifname);

1095

1161

}

1096

return 0;

1162

return false;

1097

1163

}

1098

1164

/* Accept point-to-point devices only if connect_to is specified */

1099

if(connect_to != NULL and (flags & IFF_POINTOPOINT)){

1165

if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){

1100

1166

if(debug){

1101

fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",

1102

if_entry->d_name);

1167

fprintf(stderr, "Mandos plugin mandos-client: "

1168

"Accepting point-to-point interface \"%s\"\n", ifname);

1103

1169

}

1104

return 1;

1170

return true;

1105

1171

}

1106

1172

/* Otherwise, reject non-broadcast-capable devices */

1107

if(not (flags & IFF_BROADCAST)){

1108

if(debug){

1109

fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",

1110

if_entry->d_name);

1111

}

1112

return 0;

1113

}

1173

if(not (ifr->ifr_flags & IFF_BROADCAST)){

1174

if(debug){

1175

fprintf(stderr, "Mandos plugin mandos-client: "

1176

"Rejecting non-broadcast interface \"%s\"\n", ifname);

1177

}

1178

return false;

1179

}

1180

/* Reject non-ARP interfaces (including dummy interfaces) */

1181

if(ifr->ifr_flags & IFF_NOARP){

1182

if(debug){

1183

fprintf(stderr, "Mandos plugin mandos-client: "

1184

"Rejecting non-ARP interface \"%s\"\n", ifname);

1185

}

1186

return false;

1187

}

1188

1114

1189

/* Accept this device */

1115

1190

if(debug){

1116

fprintf(stderr, "Interface \"%s\" is acceptable\n",

1117

if_entry->d_name);

1118

}

1119

return 1;

1191

fprintf(stderr, "Mandos plugin mandos-client: "

1192

"Interface \"%s\" is good\n", ifname);

1193

}

1194

return true;

1195

}

1196

1197

/*

1198

* This function determines if a directory entry in /sys/class/net

1199

* corresponds to an acceptable network device.

1200

* (This function is passed to scandir(3) as a filter function.)

1201

*/

1202

int good_interface(const struct dirent *if_entry){

1203

if(if_entry->d_name[0] == '.'){

1204

return 0;

1205

}

1206

1207

struct ifreq ifr;

1208

if(not get_flags(if_entry->d_name, &ifr)){

1209

if(debug){

1210

fprintf(stderr, "Mandos plugin mandos-client: "

1211

"Failed to get flags for interface \"%s\"\n",

1212

if_entry->d_name);

1213

}

1214

return 0;

1215

}

1216

1217

if(not good_flags(if_entry->d_name, &ifr)){

1218

return 0;

1219

}

1220

return 1;

1221

}

1222

1223

/*

1224

* This function determines if a directory entry in /sys/class/net

1225

* corresponds to an acceptable network device which is up.

1226

* (This function is passed to scandir(3) as a filter function.)

1227

*/

1228

int up_interface(const struct dirent *if_entry){

1229

if(if_entry->d_name[0] == '.'){

1230

return 0;

1231

}

1232

1233

struct ifreq ifr;

1234

if(not get_flags(if_entry->d_name, &ifr)){

1235

if(debug){

1236

fprintf(stderr, "Mandos plugin mandos-client: "

1237

"Failed to get flags for interface \"%s\"\n",

1238

if_entry->d_name);

1239

}

1240

return 0;

1241

}

1242

1243

/* Reject down interfaces */

1244

if(not (ifr.ifr_flags & IFF_UP)){

1245

if(debug){

1246

fprintf(stderr, "Mandos plugin mandos-client: "

1247

"Rejecting down interface \"%s\"\n",

1248

if_entry->d_name);

1249

}

1250

return 0;

1251

}

1252

1253

/* Reject non-running interfaces */

1254

if(not (ifr.ifr_flags & IFF_RUNNING)){

1255

if(debug){

1256

fprintf(stderr, "Mandos plugin mandos-client: "

1257

"Rejecting non-running interface \"%s\"\n",

1258

if_entry->d_name);

1259

}

1260

return 0;

1261

}

1262

1263

if(not good_flags(if_entry->d_name, &ifr)){

1264

return 0;

1265

}

1266

return 1;

1267

}

1268

1269

int notdotentries(const struct dirent *direntry){

1270

/* Skip "." and ".." */

1271

if(direntry->d_name[0] == '.'

1272

and (direntry->d_name[1] == '\0'

1273

or (direntry->d_name[1] == '.'

1274

and direntry->d_name[2] == '\0'))){

1275

return 0;

1276

}

1277

return 1;

1278

}

1279

1280

/* Is this directory entry a runnable program? */

1281

int runnable_hook(const struct dirent *direntry){

1282

int ret;

1283

size_t sret;

1284

struct stat st;

1285

1286

if((direntry->d_name)[0] == '\0'){

1287

/* Empty name? */

1288

return 0;

1289

}

1290

1291

sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"

1292

"abcdefghijklmnopqrstuvwxyz"

1293

"0123456789"

1294

"_-");

1295

if((direntry->d_name)[sret] != '\0'){

1296

/* Contains non-allowed characters */

1297

if(debug){

1298

fprintf(stderr, "Mandos plugin mandos-client: "

1299

"Ignoring hook \"%s\" with bad name\n",

1300

direntry->d_name);

1301

}

1302

return 0;

1303

}

1304

1305

char *fullname = NULL;

1306

ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);

1307

if(ret < 0){

1308

perror_plus("asprintf");

1309

return 0;

1310

}

1311

1312

ret = stat(fullname, &st);

1313

if(ret == -1){

1314

if(debug){

1315

perror_plus("Could not stat hook");

1316

}

1317

return 0;

1318

}

1319

if(not (S_ISREG(st.st_mode))){

1320

/* Not a regular file */

1321

if(debug){

1322

fprintf(stderr, "Mandos plugin mandos-client: "

1323

"Ignoring hook \"%s\" - not a file\n",

1324

direntry->d_name);

1325

}

1326

return 0;

1327

}

1328

if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){

1329

/* Not executable */

1330

if(debug){

1331

fprintf(stderr, "Mandos plugin mandos-client: "

1332

"Ignoring hook \"%s\" - not executable\n",

1333

direntry->d_name);

1334

}

1335

return 0;

1336

}

1337

return 1;

1338

}

1339

1340

int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){

1341

int ret;

1342

struct timespec now;

1343

struct timespec waited_time;

1344

intmax_t block_time;

1345

1346

while(true){

1347

if(mc.current_server == NULL){

1348

if (debug){

1349

fprintf(stderr, "Mandos plugin mandos-client: "

1350

"Wait until first server is found. No timeout!\n");

1351

}

1352

ret = avahi_simple_poll_iterate(s, -1);

1353

} else {

1354

if (debug){

1355

fprintf(stderr, "Mandos plugin mandos-client: "

1356

"Check current_server if we should run it,"

1357

" or wait\n");

1358

}

1359

/* the current time */

1360

ret = clock_gettime(CLOCK_MONOTONIC, &now);

1361

if(ret == -1){

1362

perror_plus("clock_gettime");

1363

return -1;

1364

}

1365

/* Calculating in ms how long time between now and server

1366

who we visted longest time ago. Now - last seen. */

1367

waited_time.tv_sec = (now.tv_sec

1368

- mc.current_server->last_seen.tv_sec);

1369

waited_time.tv_nsec = (now.tv_nsec

1370

- mc.current_server->last_seen.tv_nsec);

1371

/* total time is 10s/10,000ms.

1372

Converting to s from ms by dividing by 1,000,

1373

and ns to ms by dividing by 1,000,000. */

1374

block_time = ((retry_interval

1375

- ((intmax_t)waited_time.tv_sec * 1000))

1376

- ((intmax_t)waited_time.tv_nsec / 1000000));

1377

1378

if (debug){

1379

fprintf(stderr, "Mandos plugin mandos-client: "

1380

"Blocking for %" PRIdMAX " ms\n", block_time);

1381

}

1382

1383

if(block_time <= 0){

1384

ret = start_mandos_communication(mc.current_server->ip,

1385

mc.current_server->port,

1386

mc.current_server->if_index,

1387

mc.current_server->af);

1388

if(ret == 0){

1389

avahi_simple_poll_quit(mc.simple_poll);

1390

return 0;

1391

}

1392

ret = clock_gettime(CLOCK_MONOTONIC,

1393

&mc.current_server->last_seen);

1394

if(ret == -1){

1395

perror_plus("clock_gettime");

1396

return -1;

1397

}

1398

mc.current_server = mc.current_server->next;

1399

block_time = 0; /* Call avahi to find new Mandos

1400

servers, but don't block */

1401

}

1402

1403

ret = avahi_simple_poll_iterate(s, (int)block_time);

1404

}

1405

if(ret != 0){

1406

if (ret > 0 or errno != EINTR){

1407

return (ret != 1) ? ret : 0;

1408

}

1409

}

1410

}

1411

}

1412

1413

bool run_network_hooks(const char *mode, const char *interface,

1414

const float delay){

1415

struct dirent **direntries;

1416

struct dirent *direntry;

1417

int ret;

1418

int numhooks = scandir(hookdir, &direntries, runnable_hook,

1419

alphasort);

1420

if(numhooks == -1){

1421

perror_plus("scandir");

1422

} else {

1423

int devnull = open("/dev/null", O_RDONLY);

1424

for(int i = 0; i < numhooks; i++){

1425

direntry = direntries[0];

1426

char *fullname = NULL;

1427

ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);

1428

if(ret < 0){

1429

perror_plus("asprintf");

1430

continue;

1431

}

1432

pid_t hook_pid = fork();

1433

if(hook_pid == 0){

1434

/* Child */

1435

dup2(devnull, STDIN_FILENO);

1436

close(devnull);

1437

dup2(STDERR_FILENO, STDOUT_FILENO);

1438

ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);

1439

if(ret == -1){

1440

perror_plus("setenv");

1441

return false;

1442

}

1443

ret = setenv("DEVICE", interface, 1);

1444

if(ret == -1){

1445

perror_plus("setenv");

1446

return false;

1447

}

1448

ret = setenv("VERBOSE", debug ? "1" : "0", 1);

1449

if(ret == -1){

1450

perror_plus("setenv");

1451

return false;

1452

}

1453

ret = setenv("MODE", mode, 1);

1454

if(ret == -1){

1455

perror_plus("setenv");

1456

return false;

1457

}

1458

char *delaystring;

1459

ret = asprintf(&delaystring, "%f", delay);

1460

if(ret == -1){

1461

perror_plus("asprintf");

1462

return false;

1463

}

1464

ret = setenv("DELAY", delaystring, 1);

1465

if(ret == -1){

1466

free(delaystring);

1467

perror_plus("setenv");

1468

return false;

1469

}

1470

free(delaystring);

1471

ret = execl(fullname, direntry->d_name, mode, NULL);

1472

perror_plus("execl");

1473

} else {

1474

int status;

1475

if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){

1476

perror_plus("waitpid");

1477

free(fullname);

1478

continue;

1479

}

1480

if(WIFEXITED(status)){

1481

if(WEXITSTATUS(status) != 0){

1482

fprintf(stderr, "Mandos plugin mandos-client: "

1483

"Warning: network hook \"%s\" exited"

1484

" with status %d\n", direntry->d_name,

1485

WEXITSTATUS(status));

1486

free(fullname);

1487

continue;

1488

}

1489

} else if(WIFSIGNALED(status)){

1490

fprintf(stderr, "Mandos plugin mandos-client: "

1491

"Warning: network hook \"%s\" died by"

1492

" signal %d\n", direntry->d_name,

1493

WTERMSIG(status));

1494

free(fullname);

1495

continue;

1496

} else {

1497

fprintf(stderr, "Mandos plugin mandos-client: "

1498

"Warning: network hook \"%s\" crashed\n",

1499

direntry->d_name);

1500

free(fullname);

1501

continue;

1502

}

1503

}

1504

free(fullname);

1505

if(quit_now){

1506

break;

1507

}

1508

}

1509

close(devnull);

1510

}

1511

return true;

1120

1512

}

1121

1513

1122

1514

int main(int argc, char *argv[]){

1141

1533

bool gnutls_initialized = false;

1142

1534

bool gpgme_initialized = false;

1143

1535

float delay = 2.5f;

1536

double retry_interval = 10; /* 10s between trying a server and

1537

retrying the same server again */

1144

1538

1145

1539

struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };

1146

1540

struct sigaction sigterm_action = { .sa_handler = handle_sigterm };

1152

1546

errno = 0;

1153

1547

ret = setgid(gid);

1154

1548

if(ret == -1){

1155

perror("setgid");

1549

perror_plus("setgid");

1156

1550

}

1157

1551

1158

1552

/* Lower user privileges (temporarily) */

1159

1553

errno = 0;

1160

1554

ret = seteuid(uid);

1161

1555

if(ret == -1){

1162

perror("seteuid");

1556

perror_plus("seteuid");

1163

1557

}

1164

1558

1165

1559

if(quit_now){

1200

1594

.arg = "SECONDS",

1201

1595

.doc = "Maximum delay to wait for interface startup",

1202

1596

.group = 2 },

1597

{ .name = "retry", .key = 132,

1598

.arg = "SECONDS",

1599

.doc = "Retry interval used when denied by the mandos server",

1600

.group = 2 },

1601

{ .name = "network-hook-dir", .key = 133,

1602

.arg = "DIR",

1603

.doc = "Directory where network hooks are located",

1604

.group = 2 },

1203

1605

/*

1204

1606

* These reproduce what we would get without ARGP_NO_HELP

1205

1607

*/

1249

1651

if(errno != 0 or tmp == arg or *tmp != '\0'){

1250

1652

argp_error(state, "Bad delay");

1251

1653

}

1654

case 132: /* --retry */

1655

errno = 0;

1656

retry_interval = strtod(arg, &tmp);

1657

if(errno != 0 or tmp == arg or *tmp != '\0'

1658

or (retry_interval * 1000) > INT_MAX

1659

or retry_interval < 0){

1660

argp_error(state, "Bad retry interval");

1661

}

1662

break;

1663

case 133: /* --network-hook-dir */

1664

hookdir = arg;

1252

1665

break;

1253

1666

/*

1254

1667

* These reproduce what we would get without ARGP_NO_HELP

1261

1674

argp_state_help(state, state->out_stream,

1262

1675

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1263

1676

case 'V': /* --version */

1677

fprintf(state->out_stream, "Mandos plugin mandos-client: ");

1264

1678

fprintf(state->out_stream, "%s\n", argp_program_version);

1265

1679

exit(argp_err_exit_status);

1266

1680

break;

1282

1696

case ENOMEM:

1283

1697

default:

1284

1698

errno = ret;

1285

perror("argp_parse");

1699

perror_plus("argp_parse");

1286

1700

exitcode = EX_OSERR;

1287

1701

goto end;

1288

1702

case EINVAL:

1290

1704

goto end;

1291

1705

}

1292

1706

}

1707

1708

{

1709

/* Work around Debian bug #633582:

1710

<http://bugs.debian.org/633582> */

1711

struct stat st;

1712

1713

/* Re-raise priviliges */

1714

errno = 0;

1715

ret = seteuid(0);

1716

if(ret == -1){

1717

perror_plus("seteuid");

1718

}

1719

1720

if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){

1721

int seckey_fd = open(seckey, O_RDONLY);

1722

if(seckey_fd == -1){

1723

perror_plus("open");

1724

} else {

1725

ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));

1726

if(ret == -1){

1727

perror_plus("fstat");

1728

} else {

1729

if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){

1730

ret = fchown(seckey_fd, uid, gid);

1731

if(ret == -1){

1732

perror_plus("fchown");

1733

}

1734

}

1735

}

1736

TEMP_FAILURE_RETRY(close(seckey_fd));

1737

}

1738

}

1739

1740

if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){

1741

int pubkey_fd = open(pubkey, O_RDONLY);

1742

if(pubkey_fd == -1){

1743

perror_plus("open");

1744

} else {

1745

ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));

1746

if(ret == -1){

1747

perror_plus("fstat");

1748

} else {

1749

if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){

1750

ret = fchown(pubkey_fd, uid, gid);

1751

if(ret == -1){

1752

perror_plus("fchown");

1753

}

1754

}

1755

}

1756

TEMP_FAILURE_RETRY(close(pubkey_fd));

1757

}

1758

}

1759

1760

/* Lower privileges */

1761

errno = 0;

1762

ret = seteuid(uid);

1763

if(ret == -1){

1764

perror_plus("seteuid");

1765

}

1766

}

1767

1768

/* Run network hooks */

1769

{

1770

/* Re-raise priviliges */

1771

errno = 0;

1772

ret = seteuid(0);

1773

if(ret == -1){

1774

perror_plus("seteuid");

1775

}

1776

if(not run_network_hooks("start", interface, delay)){

1777

goto end;

1778

}

1779

/* Lower privileges */

1780

errno = 0;

1781

ret = seteuid(uid);

1782

if(ret == -1){

1783

perror_plus("seteuid");

1784

}

1785

}

1293

1786

1294

1787

if(not debug){

1295

1788

avahi_set_log_function(empty_log);

1296

1789

}

1297

1790

1298

1791

if(interface[0] == '\0'){

1299

1792

struct dirent **direntries;

1300

ret = scandir(sys_class_net, &direntries, good_interface,

1793

/* First look for interfaces that are up */

1794

ret = scandir(sys_class_net, &direntries, up_interface,

1301

1795

alphasort);

1796

if(ret == 0){

1797

/* No up interfaces, look for any good interfaces */

1798

free(direntries);

1799

ret = scandir(sys_class_net, &direntries, good_interface,

1800

alphasort);

1801

}

1302

1802

if(ret >= 1){

1303

/* Pick the first good interface */

1803

/* Pick the first interface returned */

1304

1804

interface = strdup(direntries[0]->d_name);

1305

1805

if(debug){

1306

fprintf(stderr, "Using interface \"%s\"\n", interface);

1806

fprintf(stderr, "Mandos plugin mandos-client: "

1807

"Using interface \"%s\"\n", interface);

1307

1808

}

1308

1809

if(interface == NULL){

1309

perror("malloc");

1810

perror_plus("malloc");

1310

1811

free(direntries);

1311

1812

exitcode = EXIT_FAILURE;

1312

1813

goto end;

1314

1815

free(direntries);

1315

1816

} else {

1316

1817

free(direntries);

1317

fprintf(stderr, "Could not find a network interface\n");

1818

fprintf(stderr, "Mandos plugin mandos-client: "

1819

"Could not find a network interface\n");

1318

1820

exitcode = EXIT_FAILURE;

1319

1821

goto end;

1320

1822

}

1326

1828

srand((unsigned int) time(NULL));

1327

1829

mc.simple_poll = avahi_simple_poll_new();

1328

1830

if(mc.simple_poll == NULL){

1329

fprintf(stderr, "Avahi: Failed to create simple poll object.\n");

1831

fprintf(stderr, "Mandos plugin mandos-client: "

1832

"Avahi: Failed to create simple poll object.\n");

1330

1833

exitcode = EX_UNAVAILABLE;

1331

1834

goto end;

1332

1835

}

1334

1837

sigemptyset(&sigterm_action.sa_mask);

1335

1838

ret = sigaddset(&sigterm_action.sa_mask, SIGINT);

1336

1839

if(ret == -1){

1337

perror("sigaddset");

1840

perror_plus("sigaddset");

1338

1841

exitcode = EX_OSERR;

1339

1842

goto end;

1340

1843

}

1341

1844

ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);

1342

1845

if(ret == -1){

1343

perror("sigaddset");

1846

perror_plus("sigaddset");

1344

1847

exitcode = EX_OSERR;

1345

1848

goto end;

1346

1849

}

1347

1850

ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);

1348

1851

if(ret == -1){

1349

perror("sigaddset");

1852

perror_plus("sigaddset");

1350

1853

exitcode = EX_OSERR;

1351

1854

goto end;

1352

1855

}

1356

1859

*/

1357

1860

ret = sigaction(SIGINT, NULL, &old_sigterm_action);

1358

1861

if(ret == -1){

1359

perror("sigaction");

1862

perror_plus("sigaction");

1360

1863

return EX_OSERR;

1361

1864

}

1362

1865

if(old_sigterm_action.sa_handler != SIG_IGN){

1363

1866

ret = sigaction(SIGINT, &sigterm_action, NULL);

1364

1867

if(ret == -1){

1365

perror("sigaction");

1868

perror_plus("sigaction");

1366

1869

exitcode = EX_OSERR;

1367

1870

goto end;

1368

1871

}

1369

1872

}

1370

1873

ret = sigaction(SIGHUP, NULL, &old_sigterm_action);

1371

1874

if(ret == -1){

1372

perror("sigaction");

1875

perror_plus("sigaction");

1373

1876

return EX_OSERR;

1374

1877

}

1375

1878

if(old_sigterm_action.sa_handler != SIG_IGN){

1376

1879

ret = sigaction(SIGHUP, &sigterm_action, NULL);

1377

1880

if(ret == -1){

1378

perror("sigaction");

1881

perror_plus("sigaction");

1379

1882

exitcode = EX_OSERR;

1380

1883

goto end;

1381

1884

}

1382

1885

}

1383

1886

ret = sigaction(SIGTERM, NULL, &old_sigterm_action);

1384

1887

if(ret == -1){

1385

perror("sigaction");

1888

perror_plus("sigaction");

1386

1889

return EX_OSERR;

1387

1890

}

1388

1891

if(old_sigterm_action.sa_handler != SIG_IGN){

1389

1892

ret = sigaction(SIGTERM, &sigterm_action, NULL);

1390

1893

if(ret == -1){

1391

perror("sigaction");

1894

perror_plus("sigaction");

1392

1895

exitcode = EX_OSERR;

1393

1896

goto end;

1394

1897

}

1398

1901

if(strcmp(interface, "none") != 0){

1399

1902

if_index = (AvahiIfIndex) if_nametoindex(interface);

1400

1903

if(if_index == 0){

1401

fprintf(stderr, "No such interface: \"%s\"\n", interface);

1904

fprintf(stderr, "Mandos plugin mandos-client: "

1905

"No such interface: \"%s\"\n", interface);

1402

1906

exitcode = EX_UNAVAILABLE;

1403

1907

goto end;

1404

1908

}

1411

1915

errno = 0;

1412

1916

ret = seteuid(0);

1413

1917

if(ret == -1){

1414

perror("seteuid");

1918

perror_plus("seteuid");

1415

1919

}

1416

1920

1417

1921

#ifdef __linux__

1421

1925

bool restore_loglevel = true;

1422

1926

if(ret == -1){

1423

1927

restore_loglevel = false;

1424

perror("klogctl");

1928

perror_plus("klogctl");

1425

1929

}

1426

1930

#endif /* __linux__ */

1427

1931

1428

1932

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1429

1933

if(sd < 0){

1430

perror("socket");

1934

perror_plus("socket");

1431

1935

exitcode = EX_OSERR;

1432

1936

#ifdef __linux__

1433

1937

if(restore_loglevel){

1434

1938

ret = klogctl(7, NULL, 0);

1435

1939

if(ret == -1){

1436

perror("klogctl");

1940

perror_plus("klogctl");

1437

1941

}

1438

1942

}

1439

1943

#endif /* __linux__ */

1441

1945

errno = 0;

1442

1946

ret = seteuid(uid);

1443

1947

if(ret == -1){

1444

perror("seteuid");

1948

perror_plus("seteuid");

1445

1949

}

1446

1950

goto end;

1447

1951

}

1448

1952

strcpy(network.ifr_name, interface);

1449

1953

ret = ioctl(sd, SIOCGIFFLAGS, &network);

1450

1954

if(ret == -1){

1451

perror("ioctl SIOCGIFFLAGS");

1955

perror_plus("ioctl SIOCGIFFLAGS");

1452

1956

#ifdef __linux__

1453

1957

if(restore_loglevel){

1454

1958

ret = klogctl(7, NULL, 0);

1455

1959

if(ret == -1){

1456

perror("klogctl");

1960

perror_plus("klogctl");

1457

1961

}

1458

1962

}

1459

1963

#endif /* __linux__ */

1462

1966

errno = 0;

1463

1967

ret = seteuid(uid);

1464

1968

if(ret == -1){

1465

perror("seteuid");

1969

perror_plus("seteuid");

1466

1970

}

1467

1971

goto end;

1468

1972

}

1472

1976

ret = ioctl(sd, SIOCSIFFLAGS, &network);

1473

1977

if(ret == -1){

1474

1978

take_down_interface = false;

1475

perror("ioctl SIOCSIFFLAGS +IFF_UP");

1979

perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");

1476

1980

exitcode = EX_OSERR;

1477

1981

#ifdef __linux__

1478

1982

if(restore_loglevel){

1479

1983

ret = klogctl(7, NULL, 0);

1480

1984

if(ret == -1){

1481

perror("klogctl");

1985

perror_plus("klogctl");

1482

1986

}

1483

1987

}

1484

1988

#endif /* __linux__ */

1486

1990

errno = 0;

1487

1991

ret = seteuid(uid);

1488

1992

if(ret == -1){

1489

perror("seteuid");

1993

perror_plus("seteuid");

1490

1994

}

1491

1995

goto end;

1492

1996

}

1493

1997

}

1494

/* sleep checking until interface is running */

1998

/* Sleep checking until interface is running.

1999

Check every 0.25s, up to total time of delay */

1495

2000

for(int i=0; i < delay * 4; i++){

1496

2001

ret = ioctl(sd, SIOCGIFFLAGS, &network);

1497

2002

if(ret == -1){

1498

perror("ioctl SIOCGIFFLAGS");

2003

perror_plus("ioctl SIOCGIFFLAGS");

1499

2004

} else if(network.ifr_flags & IFF_RUNNING){

1500

2005

break;

1501

2006

}

1502

2007

struct timespec sleeptime = { .tv_nsec = 250000000 };

1503

2008

ret = nanosleep(&sleeptime, NULL);

1504

2009

if(ret == -1 and errno != EINTR){

1505

perror("nanosleep");

2010

perror_plus("nanosleep");

1506

2011

}

1507

2012

}

1508

2013

if(not take_down_interface){

1509

2014

/* We won't need the socket anymore */

1510

2015

ret = (int)TEMP_FAILURE_RETRY(close(sd));

1511

2016

if(ret == -1){

1512

perror("close");

2017

perror_plus("close");

1513

2018

}

1514

2019

}

1515

2020

#ifdef __linux__

1517

2022

/* Restores kernel loglevel to default */

1518

2023

ret = klogctl(7, NULL, 0);

1519

2024

if(ret == -1){

1520

perror("klogctl");

2025

perror_plus("klogctl");

1521

2026

}

1522

2027

}

1523

2028

#endif /* __linux__ */

1524

2029

/* Lower privileges */

1525

2030

errno = 0;

1526

if(take_down_interface){

1527

/* Lower privileges */

1528

ret = seteuid(uid);

1529

if(ret == -1){

1530

perror("seteuid");

1531

}

1532

} else {

1533

/* Lower privileges permanently */

1534

ret = setuid(uid);

1535

if(ret == -1){

1536

perror("setuid");

1537

}

2031

/* Lower privileges */

2032

ret = seteuid(uid);

2033

if(ret == -1){

2034

perror_plus("seteuid");

1538

2035

}

1539

2036

}

1540

2037

1544

2041

1545

2042

ret = init_gnutls_global(pubkey, seckey);

1546

2043

if(ret == -1){

1547

fprintf(stderr, "init_gnutls_global failed\n");

2044

fprintf(stderr, "Mandos plugin mandos-client: "

2045

"init_gnutls_global failed\n");

1548

2046

exitcode = EX_UNAVAILABLE;

1549

2047

goto end;

1550

2048

} else {

1555

2053

goto end;

1556

2054

}

1557

2055

2056

if(mkdtemp(tempdir) == NULL){

2057

perror_plus("mkdtemp");

2058

goto end;

2059

}

1558

2060

tempdir_created = true;

1559

if(mkdtemp(tempdir) == NULL){

1560

tempdir_created = false;

1561

perror("mkdtemp");

1562

goto end;

1563

}

1564

2061

1565

2062

if(quit_now){

1566

2063

goto end;

1567

2064

}

1568

2065

1569

2066

if(not init_gpgme(pubkey, seckey, tempdir)){

1570

fprintf(stderr, "init_gpgme failed\n");

2067

fprintf(stderr, "Mandos plugin mandos-client: "

2068

"init_gpgme failed\n");

1571

2069

exitcode = EX_UNAVAILABLE;

1572

2070

goto end;

1573

2071

} else {

1583

2081

/* (Mainly meant for debugging) */

1584

2082

char *address = strrchr(connect_to, ':');

1585

2083

if(address == NULL){

1586

fprintf(stderr, "No colon in address\n");

2084

fprintf(stderr, "Mandos plugin mandos-client: "

2085

"No colon in address\n");

1587

2086

exitcode = EX_USAGE;

1588

2087

goto end;

1589

2088

}

1597

2096

tmpmax = strtoimax(address+1, &tmp, 10);

1598

2097

if(errno != 0 or tmp == address+1 or *tmp != '\0'

1599

2098

or tmpmax != (uint16_t)tmpmax){

1600

fprintf(stderr, "Bad port number\n");

2099

fprintf(stderr, "Mandos plugin mandos-client: "

2100

"Bad port number\n");

1601

2101

exitcode = EX_USAGE;

1602

2102

goto end;

1603

2103

}

1608

2108

1609

2109

port = (uint16_t)tmpmax;

1610

2110

*address = '\0';

1611

address = connect_to;

1612

2111

/* Colon in address indicates IPv6 */

1613

2112

int af;

1614

if(strchr(address, ':') != NULL){

2113

if(strchr(connect_to, ':') != NULL){

1615

2114

af = AF_INET6;

2115

/* Accept [] around IPv6 address - see RFC 5952 */

2116

if(connect_to[0] == '[' and address[-1] == ']')

2117

{

2118

connect_to++;

2119

address[-1] = '\0';

2120

}

1616

2121

} else {

1617

2122

af = AF_INET;

1618

2123

}

2124

address = connect_to;

1619

2125

1620

2126

if(quit_now){

1621

2127

goto end;

1622

2128

}

1623

2129

1624

2130

while(not quit_now){

1625

2131

ret = start_mandos_communication(address, port, if_index, af);

1626

2132

if(quit_now or ret == 0){

1627

2133

break;

1628

2134

}

1629

sleep(15);

1630

};

1631

2135

if(debug){

2136

fprintf(stderr, "Mandos plugin mandos-client: "

2137

"Retrying in %d seconds\n", (int)retry_interval);

2138

}

2139

sleep((int)retry_interval);

2140

}

2141

1632

2142

if (not quit_now){

1633

2143

exitcode = EXIT_SUCCESS;

1634

2144

}

1635

2145

1636

2146

goto end;

1637

2147

}

1638

2148

1660

2170

1661

2171

/* Check if creating the Avahi server object succeeded */

1662

2172

if(mc.server == NULL){

1663

fprintf(stderr, "Failed to create Avahi server: %s\n",

2173

fprintf(stderr, "Mandos plugin mandos-client: "

2174

"Failed to create Avahi server: %s\n",

1664

2175

avahi_strerror(error));

1665

2176

exitcode = EX_UNAVAILABLE;

1666

2177

goto end;

1675

2186

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

1676

2187

NULL, 0, browse_callback, NULL);

1677

2188

if(sb == NULL){

1678

fprintf(stderr, "Failed to create service browser: %s\n",

2189

fprintf(stderr, "Mandos plugin mandos-client: "

2190

"Failed to create service browser: %s\n",

1679

2191

avahi_strerror(avahi_server_errno(mc.server)));

1680

2192

exitcode = EX_UNAVAILABLE;

1681

2193

goto end;

1688

2200

/* Run the main loop */

1689

2201

1690

2202

if(debug){

1691

fprintf(stderr, "Starting Avahi loop search\n");

1692

}

1693

1694

avahi_simple_poll_loop(mc.simple_poll);

2203

fprintf(stderr, "Mandos plugin mandos-client: "

2204

"Starting Avahi loop search\n");

2205

}

2206

2207

ret = avahi_loop_with_timeout(mc.simple_poll,

2208

(int)(retry_interval * 1000));

2209

if(debug){

2210

fprintf(stderr, "Mandos plugin mandos-client: "

2211

"avahi_loop_with_timeout exited %s\n",

2212

(ret == 0) ? "successfully" : "with error");

2213

}

1695

2214

1696

2215

end:

1697

2216

1698

2217

if(debug){

1699

fprintf(stderr, "%s exiting\n", argv[0]);

2218

fprintf(stderr, "Mandos plugin mandos-client: "

2219

"%s exiting\n", argv[0]);

1700

2220

}

1701

2221

1702

2222

/* Cleanup things */

1718

2238

if(gpgme_initialized){

1719

2239

gpgme_release(mc.ctx);

1720

2240

}

2241

2242

/* Cleans up the circular linked list of Mandos servers the client

2243

has seen */

2244

if(mc.current_server != NULL){

2245

mc.current_server->prev->next = NULL;

2246

while(mc.current_server != NULL){

2247

server *next = mc.current_server->next;

2248

free(mc.current_server);

2249

mc.current_server = next;

2250

}

2251

}

1721

2252

1722

/* Take down the network interface */

1723

if(take_down_interface){

1724

/* Re-raise priviliges */

2253

/* Re-raise priviliges */

2254

{

1725

2255

errno = 0;

1726

2256

ret = seteuid(0);

1727

2257

if(ret == -1){

1728

perror("seteuid");

1729

}

1730

if(geteuid() == 0){

2258

perror_plus("seteuid");

2259

}

2260

/* Run network hooks */

2261

if(not run_network_hooks("stop", interface, delay)){

2262

goto end;

2263

}

2264

2265

/* Take down the network interface */

2266

if(take_down_interface and geteuid() == 0){

1731

2267

ret = ioctl(sd, SIOCGIFFLAGS, &network);

1732

2268

if(ret == -1){

1733

perror("ioctl SIOCGIFFLAGS");

1734

} else if(network.ifr_flags & IFF_UP) {

2269

perror_plus("ioctl SIOCGIFFLAGS");

2270

} else if(network.ifr_flags & IFF_UP){

1735

2271

network.ifr_flags &= ~(short)IFF_UP; /* clear flag */

1736

2272

ret = ioctl(sd, SIOCSIFFLAGS, &network);

1737

2273

if(ret == -1){

1738

perror("ioctl SIOCSIFFLAGS -IFF_UP");

2274

perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");

1739

2275

}

1740

2276

}

1741

2277

ret = (int)TEMP_FAILURE_RETRY(close(sd));

1742

2278

if(ret == -1){

1743

perror("close");

1744

}

1745

/* Lower privileges permanently */

1746

errno = 0;

1747

ret = setuid(uid);

1748

if(ret == -1){

1749

perror("setuid");

2279

perror_plus("close");

1750

2280

}

1751

2281

}

1752

2282

}

2283

/* Lower privileges permanently */

2284

errno = 0;

2285

ret = setuid(uid);

2286

if(ret == -1){

2287

perror_plus("setuid");

2288

}

1753

2289

1754

/* Removes the temp directory used by GPGME */

2290

/* Removes the GPGME temp directory and all files inside */

1755

2291

if(tempdir_created){

1756

DIR *d;

1757

struct dirent *direntry;

1758

d = opendir(tempdir);

1759

if(d == NULL){

1760

if(errno != ENOENT){

1761

perror("opendir");

1762

}

1763

} else {

1764

while(true){

1765

direntry = readdir(d);

1766

if(direntry == NULL){

1767

break;

1768

}

1769

/* Skip "." and ".." */

1770

if(direntry->d_name[0] == '.'

1771

and (direntry->d_name[1] == '\0'

1772

or (direntry->d_name[1] == '.'

1773

and direntry->d_name[2] == '\0'))){

1774

continue;

1775

}

2292

struct dirent **direntries = NULL;

2293

struct dirent *direntry = NULL;

2294

int numentries = scandir(tempdir, &direntries, notdotentries,

2295

alphasort);

2296

if (numentries > 0){

2297

for(int i = 0; i < numentries; i++){

2298

direntry = direntries[i];

1776

2299

char *fullname = NULL;

1777

2300

ret = asprintf(&fullname, "%s/%s", tempdir,

1778

2301

direntry->d_name);

1779

2302

if(ret < 0){

1780

perror("asprintf");

2303

perror_plus("asprintf");

1781

2304

continue;

1782

2305

}

1783

2306

ret = remove(fullname);

1784

2307

if(ret == -1){

1785

fprintf(stderr, "remove(\"%s\"): %s\n", fullname,

1786

strerror(errno));

2308

fprintf(stderr, "Mandos plugin mandos-client: "

2309

"remove(\"%s\"): %s\n", fullname, strerror(errno));

1787

2310

}

1788

2311

free(fullname);

1789

2312

}

1790

closedir(d);

2313

}

2314

2315

/* need to clean even if 0 because man page doesn't specify */

2316

free(direntries);

2317

if (numentries == -1){

2318

perror_plus("scandir");

1791

2319

}

1792

2320

ret = rmdir(tempdir);

1793

2321

if(ret == -1 and errno != ENOENT){

1794

perror("rmdir");

2322

perror_plus("rmdir");

1795

2323

}

1796

2324

}

1797

2325

1802

2330

&old_sigterm_action,

1803

2331

NULL));

1804

2332

if(ret == -1){

1805

perror("sigaction");

2333

perror_plus("sigaction");

1806

2334

}

1807

2335

do {

1808

2336

ret = raise(signal_received);

1809

2337

} while(ret != 0 and errno == EINTR);

1810

2338

if(ret != 0){

1811

perror("raise");

2339

perror_plus("raise");

1812

2340

abort();

1813

2341

}

1814

2342

TEMP_FAILURE_RETRY(pause());