/mandos/release : revision 237.7.79

73

*/

74

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

75

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

76

setgid(), pause() */

76

setgid(), pause(), _exit() */

77

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

78

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

79

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

87

EX_NOHOST, EX_IOERR, EX_PROTOCOL */

88

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

89

WEXITSTATUS(), WTERMSIG() */

90

#include <grp.h> /* setgroups() */

90

91

92

#ifdef __linux__

92

93

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

174

175

perror(print_text);

175

176

}

176

177

178

int fprintf_plus(FILE *stream, const char *format, ...){

179

va_list ap;

180

va_start (ap, format);

181

182

TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",

183

program_invocation_short_name));

184

return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));

185

}

186

177

187

/*

178

188

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

179

189

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

192

202

}

193

203

194

204

/* 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){

205

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

206

int af){

197

207

int ret;

198

208

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

199

209

if(new_server == NULL){

200

210

perror_plus("malloc");

201

return -1;

211

return false;

202

212

}

203

213

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

204

214

.port = port,

206

216

.af = af };

207

217

if(new_server->ip == NULL){

208

218

perror_plus("strdup");

209

return -1;

219

return false;

210

220

}

211

221

/* Special case of first server */

212

222

if (mc.current_server == NULL){

223

233

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

224

234

if(ret == -1){

225

235

perror_plus("clock_gettime");

226

return -1;

236

return false;

227

237

}

228

return 0;

238

return true;

229

239

}

230

240

231

241

/*

253

263

254

264

rc = gpgme_data_new_from_fd(&pgp_data, fd);

255

265

if(rc != GPG_ERR_NO_ERROR){

256

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

257

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

258

gpgme_strsource(rc), gpgme_strerror(rc));

266

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

267

gpgme_strsource(rc), gpgme_strerror(rc));

259

268

return false;

260

269

}

261

270

262

271

rc = gpgme_op_import(mc.ctx, pgp_data);

263

272

if(rc != GPG_ERR_NO_ERROR){

264

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

265

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

266

gpgme_strsource(rc), gpgme_strerror(rc));

273

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

274

gpgme_strsource(rc), gpgme_strerror(rc));

267

275

return false;

268

276

}

269

277

276

284

}

277

285

278

286

if(debug){

279

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

280

"Initializing GPGME\n");

287

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

281

288

}

282

289

283

290

/* Init GPGME */

284

291

gpgme_check_version(NULL);

285

292

rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

286

293

if(rc != GPG_ERR_NO_ERROR){

287

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

288

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

289

gpgme_strsource(rc), gpgme_strerror(rc));

294

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

295

gpgme_strsource(rc), gpgme_strerror(rc));

290

296

return false;

291

297

}

292

298

293

299

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

294

300

rc = gpgme_get_engine_info(&engine_info);

295

301

if(rc != GPG_ERR_NO_ERROR){

296

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

297

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

298

gpgme_strsource(rc), gpgme_strerror(rc));

302

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

303

gpgme_strsource(rc), gpgme_strerror(rc));

299

304

return false;

300

305

}

301

306

while(engine_info != NULL){

307

312

engine_info = engine_info->next;

308

313

}

309

314

if(engine_info == NULL){

310

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

311

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

315

fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",

316

tempdir);

312

317

return false;

313

318

}

314

319

315

320

/* Create new GPGME "context" */

316

321

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

317

322

if(rc != GPG_ERR_NO_ERROR){

318

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

319

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

320

gpgme_strerror(rc));

323

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

324

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

325

gpgme_strerror(rc));

321

326

return false;

322

327

}

323

328

342

347

ssize_t plaintext_length = 0;

343

348

344

349

if(debug){

345

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

346

"Trying to decrypt OpenPGP data\n");

350

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

347

351

}

348

352

349

353

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

350

354

rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,

351

355

0);

352

356

if(rc != GPG_ERR_NO_ERROR){

353

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

354

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

355

gpgme_strsource(rc), gpgme_strerror(rc));

357

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

358

gpgme_strsource(rc), gpgme_strerror(rc));

356

359

return -1;

357

360

}

358

361

359

362

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

360

363

rc = gpgme_data_new(&dh_plain);

361

364

if(rc != GPG_ERR_NO_ERROR){

362

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

363

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

364

gpgme_strsource(rc), gpgme_strerror(rc));

365

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

366

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

367

gpgme_strsource(rc), gpgme_strerror(rc));

365

368

gpgme_data_release(dh_crypto);

366

369

return -1;

367

370

}

370

373

data buffer */

371

374

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

372

375

if(rc != GPG_ERR_NO_ERROR){

373

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

374

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

375

gpgme_strsource(rc), gpgme_strerror(rc));

376

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

377

gpgme_strsource(rc), gpgme_strerror(rc));

376

378

plaintext_length = -1;

377

379

if(debug){

378

380

gpgme_decrypt_result_t result;

379

381

result = gpgme_op_decrypt_result(mc.ctx);

380

382

if(result == NULL){

381

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

382

"gpgme_op_decrypt_result failed\n");

383

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

383

384

} else {

384

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

385

"Unsupported algorithm: %s\n",

386

result->unsupported_algorithm);

387

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

388

"Wrong key usage: %u\n",

389

result->wrong_key_usage);

385

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

386

result->unsupported_algorithm);

387

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

388

result->wrong_key_usage);

390

389

if(result->file_name != NULL){

391

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

392

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

390

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

393

391

}

394

392

gpgme_recipient_t recipient;

395

393

recipient = result->recipients;

396

394

while(recipient != NULL){

397

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

398

"Public key algorithm: %s\n",

399

gpgme_pubkey_algo_name(recipient->pubkey_algo));

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",

404

recipient->status == GPG_ERR_NO_SECKEY

405

? "No" : "Yes");

395

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

396

gpgme_pubkey_algo_name

397

(recipient->pubkey_algo));

398

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

399

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

400

recipient->status == GPG_ERR_NO_SECKEY

401

? "No" : "Yes");

406

402

recipient = recipient->next;

407

403

}

408

404

}

411

407

}

412

408

413

409

if(debug){

414

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

415

"Decryption of OpenPGP data succeeded\n");

410

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

416

411

}

417

412

418

413

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

449

444

}

450

445

451

446

if(debug){

452

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

453

"Decrypted password is: ");

447

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

454

448

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

455

449

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

456

450

}

478

472

/* GnuTLS log function callback */

479

473

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

480

474

const char* string){

481

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

475

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

482

476

}

483

477

484

478

static int init_gnutls_global(const char *pubkeyfilename,

486

480

int ret;

487

481

488

482

if(debug){

489

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

490

"Initializing GnuTLS\n");

483

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

491

484

}

492

485

493

486

ret = gnutls_global_init();

494

487

if(ret != GNUTLS_E_SUCCESS){

495

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

496

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

488

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

489

safer_gnutls_strerror(ret));

497

490

return -1;

498

491

}

499

492

508

501

/* OpenPGP credentials */

509

502

ret = gnutls_certificate_allocate_credentials(&mc.cred);

510

503

if(ret != GNUTLS_E_SUCCESS){

511

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

512

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

504

fprintf_plus(stderr, "GnuTLS memory error: %s\n",

505

safer_gnutls_strerror(ret));

513

506

gnutls_global_deinit();

514

507

return -1;

515

508

}

516

509

517

510

if(debug){

518

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

519

"Attempting to use OpenPGP public key %s and"

520

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

521

seckeyfilename);

511

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

512

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

513

pubkeyfilename,

514

seckeyfilename);

522

515

}

523

516

524

517

ret = gnutls_certificate_set_openpgp_key_file

525

518

(mc.cred, pubkeyfilename, seckeyfilename,

526

519

GNUTLS_OPENPGP_FMT_BASE64);

527

520

if(ret != GNUTLS_E_SUCCESS){

528

fprintf(stderr,

529

"Mandos plugin mandos-client: "

530

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

531

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

532

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

533

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

521

fprintf_plus(stderr,

522

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

523

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

524

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

525

safer_gnutls_strerror(ret));

534

526

goto globalfail;

535

527

}

536

528

537

529

/* GnuTLS server initialization */

538

530

ret = gnutls_dh_params_init(&mc.dh_params);

539

531

if(ret != GNUTLS_E_SUCCESS){

540

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

541

"Error in GnuTLS DH parameter initialization:"

542

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

532

fprintf_plus(stderr, "Error in GnuTLS DH parameter"

533

" initialization: %s\n",

534

safer_gnutls_strerror(ret));

543

535

goto globalfail;

544

536

}

545

537

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

546

538

if(ret != GNUTLS_E_SUCCESS){

547

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

548

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

549

safer_gnutls_strerror(ret));

539

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

540

safer_gnutls_strerror(ret));

550

541

goto globalfail;

551

542

}

552

543

572

563

}

573

564

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

574

565

if(ret != GNUTLS_E_SUCCESS){

575

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

576

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

577

safer_gnutls_strerror(ret));

566

fprintf_plus(stderr,

567

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

568

safer_gnutls_strerror(ret));

578

569

}

579

570

580

571

{

587

578

}

588

579

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

589

580

if(ret != GNUTLS_E_SUCCESS){

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));

581

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

582

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

583

safer_gnutls_strerror(ret));

594

584

gnutls_deinit(*session);

595

585

return -1;

596

586

}

605

595

}

606

596

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

607

597

if(ret != GNUTLS_E_SUCCESS){

608

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

609

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

610

safer_gnutls_strerror(ret));

598

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

599

safer_gnutls_strerror(ret));

611

600

gnutls_deinit(*session);

612

601

return -1;

613

602

}

658

647

pf = PF_INET;

659

648

break;

660

649

default:

661

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

662

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

650

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

663

651

errno = EINVAL;

664

652

return -1;

665

653

}

670

658

}

671

659

672

660

if(debug){

673

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

674

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

675

"\n", ip, port);

661

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

662

PRIu16 "\n", ip, port);

676

663

}

677

664

678

665

tcp_sd = socket(pf, SOCK_STREAM, 0);

704

691

}

705

692

if(ret == 0){

706

693

int e = errno;

707

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

708

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

694

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

709

695

errno = e;

710

696

goto mandos_end;

711

697

}

718

704

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

719

705

-Wunreachable-code*/

720

706

if(if_index == AVAHI_IF_UNSPEC){

721

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

722

"An IPv6 link-local address is incomplete"

723

" without a network interface\n");

707

fprintf_plus(stderr, "An IPv6 link-local address is"

708

" incomplete without a network interface\n");

724

709

errno = EINVAL;

725

710

goto mandos_end;

726

711

}

744

729

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

745

730

perror_plus("if_indextoname");

746

731

} else {

747

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

748

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

749

ip, interface, port);

732

fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16

733

"\n", ip, interface, port);

750

734

}

751

735

} else {

752

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

753

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

736

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

737

ip, port);

754

738

}

755

739

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

756

740

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

766

750

perror_plus("inet_ntop");

767

751

} else {

768

752

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

769

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

770

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

753

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

771

754

}

772

755

}

773

756

}

827

810

}

828

811

829

812

if(debug){

830

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

831

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

813

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

832

814

}

833

815

834

816

if(quit_now){

854

836

855

837

if(ret != GNUTLS_E_SUCCESS){

856

838

if(debug){

857

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

858

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

839

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

859

840

gnutls_perror(ret);

860

841

}

861

842

errno = EPROTO;

865

846

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

866

847

867

848

if(debug){

868

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

869

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

849

fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"

850

" %s\n", ip);

870

851

}

871

852

872

853

while(true){

910

891

}

911

892

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

912

893

if(ret < 0){

913

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

914

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

894

fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "

895

"***\n");

915

896

gnutls_perror(ret);

916

897

errno = EPROTO;

917

898

goto mandos_end;

918

899

}

919

900

break;

920

901

default:

921

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

922

"Unknown error while reading data from"

923

" encrypted session with Mandos server\n");

902

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

903

" encrypted session with Mandos server\n");

924

904

gnutls_bye(session, GNUTLS_SHUT_RDWR);

925

905

errno = EIO;

926

906

goto mandos_end;

931

911

}

932

912

933

913

if(debug){

934

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

935

"Closing TLS session\n");

914

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

936

915

}

937

916

938

917

if(quit_now){

967

946

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

968

947

int e = errno;

969

948

if(debug){

970

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

971

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

972

strerror(errno));

949

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

950

strerror(errno));

973

951

}

974

952

errno = e;

975

953

goto mandos_end;

1032

1010

switch(event){

1033

1011

default:

1034

1012

case AVAHI_RESOLVER_FAILURE:

1035

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

1036

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

1037

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

1038

avahi_strerror(avahi_server_errno(mc.server)));

1013

fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "

1014

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

1015

domain,

1016

avahi_strerror(avahi_server_errno(mc.server)));

1039

1017

break;

1040

1018

1041

1019

case AVAHI_RESOLVER_FOUND:

1043

1021

char ip[AVAHI_ADDRESS_STR_MAX];

1044

1022

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

1045

1023

if(debug){

1046

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

1047

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

1048

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

1049

ip, (intmax_t)interface, port);

1024

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

1025

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

1026

host_name, ip, (intmax_t)interface, port);

1050

1027

}

1051

1028

int ret = start_mandos_communication(ip, port, interface,

1052

1029

avahi_proto_to_af(proto));

1053

1030

if(ret == 0){

1054

1031

avahi_simple_poll_quit(mc.simple_poll);

1055

1032

} else {

1056

ret = add_server(ip, port, interface,

1057

avahi_proto_to_af(proto));

1033

if(not add_server(ip, port, interface,

1034

avahi_proto_to_af(proto))){

1035

fprintf_plus(stderr, "Failed to add server \"%s\" to server"

1036

" list\n", name);

1037

}

1058

1038

}

1059

1039

}

1060

1040

}

1084

1064

default:

1085

1065

case AVAHI_BROWSER_FAILURE:

1086

1066

1087

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

1088

"(Avahi browser) %s\n",

1089

avahi_strerror(avahi_server_errno(mc.server)));

1067

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

1068

avahi_strerror(avahi_server_errno(mc.server)));

1090

1069

avahi_simple_poll_quit(mc.simple_poll);

1091

1070

return;

1092

1071

1099

1078

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

1100

1079

name, type, domain, protocol, 0,

1101

1080

resolve_callback, NULL) == NULL)

1102

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

1103

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

1104

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

1081

fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"

1082

" %s\n", name,

1083

avahi_strerror(avahi_server_errno(mc.server)));

1105

1084

break;

1106

1085

1107

1086

case AVAHI_BROWSER_REMOVE:

1110

1089

case AVAHI_BROWSER_ALL_FOR_NOW:

1111

1090

case AVAHI_BROWSER_CACHE_EXHAUSTED:

1112

1091

if(debug){

1113

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

1114

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

1092

fprintf_plus(stderr, "No Mandos server found, still"

1093

" searching...\n");

1115

1094

}

1116

1095

break;

1117

1096

}

1156

1135

/* Reject the loopback device */

1157

1136

if(ifr->ifr_flags & IFF_LOOPBACK){

1158

1137

if(debug){

1159

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

1160

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

1138

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

1139

ifname);

1161

1140

}

1162

1141

return false;

1163

1142

}

1164

1143

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

1165

1144

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

1166

1145

if(debug){

1167

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

1168

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

1146

fprintf_plus(stderr, "Accepting point-to-point interface"

1147

" \"%s\"\n", ifname);

1169

1148

}

1170

1149

return true;

1171

1150

}

1172

1151

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

1173

1152

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

1174

1153

if(debug){

1175

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

1176

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

1154

fprintf_plus(stderr, "Rejecting non-broadcast interface"

1155

" \"%s\"\n", ifname);

1177

1156

}

1178

1157

return false;

1179

1158

}

1180

1159

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

1181

1160

if(ifr->ifr_flags & IFF_NOARP){

1182

1161

if(debug){

1183

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

1184

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

1162

fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",

1163

ifname);

1185

1164

}

1186

1165

return false;

1187

1166

}

1188

1167

1189

1168

/* Accept this device */

1190

1169

if(debug){

1191

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

1192

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

1170

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

1193

1171

}

1194

1172

return true;

1195

1173

}

1207

1185

struct ifreq ifr;

1208

1186

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

1209

1187

if(debug){

1210

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

1211

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

1212

if_entry->d_name);

1188

fprintf_plus(stderr, "Failed to get flags for interface "

1189

"\"%s\"\n", if_entry->d_name);

1213

1190

}

1214

1191

return 0;

1215

1192

}

1233

1210

struct ifreq ifr;

1234

1211

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

1235

1212

if(debug){

1236

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

1237

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

1238

if_entry->d_name);

1213

fprintf_plus(stderr, "Failed to get flags for interface "

1214

"\"%s\"\n", if_entry->d_name);

1239

1215

}

1240

1216

return 0;

1241

1217

}

1243

1219

/* Reject down interfaces */

1244

1220

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

1245

1221

if(debug){

1246

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

1247

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

1248

if_entry->d_name);

1222

fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",

1223

if_entry->d_name);

1249

1224

}

1250

1225

return 0;

1251

1226

}

1253

1228

/* Reject non-running interfaces */

1254

1229

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

1255

1230

if(debug){

1256

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

1257

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

1258

if_entry->d_name);

1231

fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",

1232

if_entry->d_name);

1259

1233

}

1260

1234

return 0;

1261

1235

}

1295

1269

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

1296

1270

/* Contains non-allowed characters */

1297

1271

if(debug){

1298

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

1299

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

1300

direntry->d_name);

1272

fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",

1273

direntry->d_name);

1301

1274

}

1302

1275

return 0;

1303

1276

}

1319

1292

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

1320

1293

/* Not a regular file */

1321

1294

if(debug){

1322

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

1323

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

1324

direntry->d_name);

1295

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

1296

direntry->d_name);

1325

1297

}

1326

1298

return 0;

1327

1299

}

1328

1300

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

1329

1301

/* Not executable */

1330

1302

if(debug){

1331

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

1332

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

1333

direntry->d_name);

1303

fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",

1304

direntry->d_name);

1334

1305

}

1335

1306

return 0;

1336

1307

}

1308

if(debug){

1309

fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",

1310

direntry->d_name);

1311

}

1337

1312

return 1;

1338

1313

}

1339

1314

1346

1321

while(true){

1347

1322

if(mc.current_server == NULL){

1348

1323

if (debug){

1349

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

1350

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

1324

fprintf_plus(stderr, "Wait until first server is found."

1325

" No timeout!\n");

1351

1326

}

1352

1327

ret = avahi_simple_poll_iterate(s, -1);

1353

1328

} else {

1354

1329

if (debug){

1355

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

1356

"Check current_server if we should run it,"

1357

" or wait\n");

1330

fprintf_plus(stderr, "Check current_server if we should run"

1331

" it, or wait\n");

1358

1332

}

1359

1333

/* the current time */

1360

1334

ret = clock_gettime(CLOCK_MONOTONIC, &now);

1376

1350

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

1377

1351

1378

1352

if (debug){

1379

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

1380

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

1353

fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",

1354

block_time);

1381

1355

}

1382

1356

1383

1357

if(block_time <= 0){

1410

1384

}

1411

1385

}

1412

1386

1387

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

1388

const float delay){

1389

struct dirent **direntries;

1390

struct dirent *direntry;

1391

int ret;

1392

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

1393

alphasort);

1394

if(numhooks == -1){

1395

perror_plus("scandir");

1396

} else {

1397

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

1398

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

1399

direntry = direntries[i];

1400

char *fullname = NULL;

1401

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

1402

if(ret < 0){

1403

perror_plus("asprintf");

1404

continue;

1405

}

1406

if(debug){

1407

fprintf_plus(stderr, "Running network hook \"%s\"\n",

1408

direntry->d_name);

1409

}

1410

pid_t hook_pid = fork();

1411

if(hook_pid == 0){

1412

/* Child */

1413

/* Raise privileges */

1414

errno = 0;

1415

ret = seteuid(0);

1416

if(ret == -1){

1417

perror_plus("seteuid");

1418

}

1419

/* Raise privileges even more */

1420

errno = 0;

1421

ret = setuid(0);

1422

if(ret == -1){

1423

perror_plus("setuid");

1424

}

1425

/* Set group */

1426

errno = 0;

1427

ret = setgid(0);

1428

if(ret == -1){

1429

perror_plus("setgid");

1430

}

1431

/* Reset supplementary groups */

1432

errno = 0;

1433

ret = setgroups(0, NULL);

1434

if(ret == -1){

1435

perror_plus("setgroups");

1436

}

1437

dup2(devnull, STDIN_FILENO);

1438

close(devnull);

1439

dup2(STDERR_FILENO, STDOUT_FILENO);

1440

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

1441

if(ret == -1){

1442

perror_plus("setenv");

1443

_exit(EX_OSERR);

1444

}

1445

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

1446

if(ret == -1){

1447

perror_plus("setenv");

1448

_exit(EX_OSERR);

1449

}

1450

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

1451

if(ret == -1){

1452

perror_plus("setenv");

1453

_exit(EX_OSERR);

1454

}

1455

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

1456

if(ret == -1){

1457

perror_plus("setenv");

1458

_exit(EX_OSERR);

1459

}

1460

char *delaystring;

1461

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

1462

if(ret == -1){

1463

perror_plus("asprintf");

1464

_exit(EX_OSERR);

1465

}

1466

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

1467

if(ret == -1){

1468

free(delaystring);

1469

perror_plus("setenv");

1470

_exit(EX_OSERR);

1471

}

1472

free(delaystring);

1473

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

1474

perror_plus("execl");

1475

} else {

1476

int status;

1477

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

1478

perror_plus("waitpid");

1479

free(fullname);

1480

continue;

1481

}

1482

if(WIFEXITED(status)){

1483

if(WEXITSTATUS(status) != 0){

1484

fprintf_plus(stderr, "Warning: network hook \"%s\" exited"

1485

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

1486

WEXITSTATUS(status));

1487

free(fullname);

1488

continue;

1489

}

1490

} else if(WIFSIGNALED(status)){

1491

fprintf_plus(stderr, "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_plus(stderr, "Warning: network hook \"%s\""

1498

" crashed\n", direntry->d_name);

1499

free(fullname);

1500

continue;

1501

}

1502

}

1503

free(fullname);

1504

if(debug){

1505

fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",

1506

direntry->d_name);

1507

}

1508

}

1509

close(devnull);

1510

}

1511

return true;

1512

}

1513

1413

1514

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

1414

1515

AvahiSServiceBrowser *sb = NULL;

1415

1516

int error;

1573

1674

argp_state_help(state, state->out_stream,

1574

1675

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1575

1676

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

1576

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

1577

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

1677

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

1578

1678

exit(argp_err_exit_status);

1579

1679

break;

1580

1680

default:

1607

1707

{

1608

1708

/* Work around Debian bug #633582:

1609

1709

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

1610

struct stat st;

1611

1710

1612

1711

/* Re-raise priviliges */

1613

1712

errno = 0;

1614

1713

ret = seteuid(0);

1615

1714

if(ret == -1){

1616

1715

perror_plus("seteuid");

1617

}

1618

1619

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

1620

int seckey_fd = open(seckey, O_RDONLY);

1621

if(seckey_fd == -1){

1622

perror_plus("open");

1623

} else {

1624

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

1625

if(ret == -1){

1626

perror_plus("fstat");

1627

} else {

1628

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

1629

ret = fchown(seckey_fd, uid, gid);

1630

if(ret == -1){

1631

perror_plus("fchown");

1632

}

1633

}

1634

}

1635

TEMP_FAILURE_RETRY(close(seckey_fd));

1636

}

1637

}

1638

1639

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

1640

int pubkey_fd = open(pubkey, O_RDONLY);

1641

if(pubkey_fd == -1){

1642

perror_plus("open");

1643

} else {

1644

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

1645

if(ret == -1){

1646

perror_plus("fstat");

1647

} else {

1648

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

1649

ret = fchown(pubkey_fd, uid, gid);

1650

if(ret == -1){

1651

perror_plus("fchown");

1652

}

1653

}

1654

}

1655

TEMP_FAILURE_RETRY(close(pubkey_fd));

1656

}

1657

}

1658

1659

/* Lower privileges */

1660

errno = 0;

1661

ret = seteuid(uid);

1662

if(ret == -1){

1663

perror_plus("seteuid");

1664

}

1665

}

1666

1667

/* Find network hooks and run them */

1668

{

1669

struct dirent **direntries;

1670

struct dirent *direntry;

1671

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

1672

alphasort);

1673

if(numhooks == -1){

1674

perror_plus("scandir");

1675

1716

} else {

1676

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

1677

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

1678

direntry = direntries[0];

1679

char *fullname = NULL;

1680

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

1681

if(ret < 0){

1682

perror_plus("asprintf");

1683

continue;

1684

}

1685

pid_t hook_pid = fork();

1686

if(hook_pid == 0){

1687

/* Child */

1688

dup2(devnull, STDIN_FILENO);

1689

close(devnull);

1690

dup2(STDERR_FILENO, STDOUT_FILENO);

1691

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

1692

if(ret == -1){

1693

perror_plus("setenv");

1694

exit(1);

1695

}

1696

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

1697

if(ret == -1){

1698

perror_plus("setenv");

1699

exit(1);

1700

}

1701

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

1702

if(ret == -1){

1703

perror_plus("setenv");

1704

exit(1);

1705

}

1706

char *delaystring;

1707

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

1708

if(ret == -1){

1709

perror_plus("asprintf");

1710

exit(1);

1711

}

1712

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

1713

if(ret == -1){

1714

free(delaystring);

1715

perror_plus("setenv");

1716

exit(1);

1717

}

1718

free(delaystring);

1719

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

1720

perror_plus("execl");

1721

} else {

1722

int status;

1723

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

1724

perror_plus("waitpid");

1725

free(fullname);

1726

continue;

1727

}

1728

if(WIFEXITED(status)){

1729

if(WEXITSTATUS(status) != 0){

1730

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

1731

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

1732

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

1733

WEXITSTATUS(status));

1734

free(fullname);

1735

continue;

1736

}

1737

} else if(WIFSIGNALED(status)){

1738

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

1739

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

1740

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

1741

WTERMSIG(status));

1742

free(fullname);

1743

continue;

1744

} else {

1745

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

1746

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

1747

direntry->d_name);

1748

free(fullname);

1749

continue;

1750

}

1751

}

1752

free(fullname);

1753

if(quit_now){

1754

goto end;

1755

}

1756

}

1757

close(devnull);

1717

struct stat st;

1718

1719

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

1720

int seckey_fd = open(seckey, O_RDONLY);

1721

if(seckey_fd == -1){

1722

perror_plus("open");

1723

} else {

1724

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

1725

if(ret == -1){

1726

perror_plus("fstat");

1727

} else {

1728

if(S_ISREG(st.st_mode)

1729

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)

1750

and st.st_uid == 0 and st.st_gid == 0){

1751

ret = fchown(pubkey_fd, uid, gid);

1752

if(ret == -1){

1753

perror_plus("fchown");

1754

}

1755

}

1756

}

1757

TEMP_FAILURE_RETRY(close(pubkey_fd));

1758

}

1759

}

1760

1761

/* Lower privileges */

1762

errno = 0;

1763

ret = seteuid(uid);

1764

if(ret == -1){

1765

perror_plus("seteuid");

1766

}

1758

1767

}

1759

1768

}

1760

1769

1770

/* Run network hooks */

1771

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

1772

goto end;

1773

}

1774

1761

1775

if(not debug){

1762

1776

avahi_set_log_function(empty_log);

1763

1777

}

1777

1791

/* Pick the first interface returned */

1778

1792

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

1779

1793

if(debug){

1780

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

1781

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

1794

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

1782

1795

}

1783

1796

if(interface == NULL){

1784

1797

perror_plus("malloc");

1789

1802

free(direntries);

1790

1803

} else {

1791

1804

free(direntries);

1792

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

1793

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

1805

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

1794

1806

exitcode = EXIT_FAILURE;

1795

1807

goto end;

1796

1808

}

1802

1814

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

1803

1815

mc.simple_poll = avahi_simple_poll_new();

1804

1816

if(mc.simple_poll == NULL){

1805

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

1806

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

1817

fprintf_plus(stderr,

1818

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

1807

1819

exitcode = EX_UNAVAILABLE;

1808

1820

goto end;

1809

1821

}

1875

1887

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

1876

1888

if_index = (AvahiIfIndex) if_nametoindex(interface);

1877

1889

if(if_index == 0){

1878

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

1879

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

1890

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

1880

1891

exitcode = EX_UNAVAILABLE;

1881

1892

goto end;

1882

1893

}

2002

2013

#endif /* __linux__ */

2003

2014

/* Lower privileges */

2004

2015

errno = 0;

2005

if(take_down_interface){

2006

/* Lower privileges */

2007

ret = seteuid(uid);

2008

if(ret == -1){

2009

perror_plus("seteuid");

2010

}

2011

} else {

2012

/* Lower privileges permanently */

2013

ret = setuid(uid);

2014

if(ret == -1){

2015

perror_plus("setuid");

2016

}

2016

/* Lower privileges */

2017

ret = seteuid(uid);

2018

if(ret == -1){

2019

perror_plus("seteuid");

2017

2020

}

2018

2021

}

2019

2022

2023

2026

2024

2027

ret = init_gnutls_global(pubkey, seckey);

2025

2028

if(ret == -1){

2026

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

2027

"init_gnutls_global failed\n");

2029

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

2028

2030

exitcode = EX_UNAVAILABLE;

2029

2031

goto end;

2030

2032

} else {

2046

2048

}

2047

2049

2048

2050

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

2049

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

2050

"init_gpgme failed\n");

2051

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

2051

2052

exitcode = EX_UNAVAILABLE;

2052

2053

goto end;

2053

2054

} else {

2063

2064

/* (Mainly meant for debugging) */

2064

2065

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

2065

2066

if(address == NULL){

2066

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

2067

"No colon in address\n");

2067

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

2068

exitcode = EX_USAGE;

2069

goto end;

2070

}

2078

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

2079

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

2080

or tmpmax != (uint16_t)tmpmax){

2081

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

2082

"Bad port number\n");

2081

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

2083

2082

exitcode = EX_USAGE;

2084

2083

goto end;

2085

2084

}

2115

2114

break;

2116

2115

}

2117

2116

if(debug){

2118

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

2119

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

2117

fprintf_plus(stderr, "Retrying in %d seconds\n",

2118

(int)retry_interval);

2120

2119

}

2121

2120

sleep((int)retry_interval);

2122

2121

}

2152

2151

2153

2152

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

2154

2153

if(mc.server == NULL){

2155

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

2156

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

2157

avahi_strerror(error));

2154

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

2155

avahi_strerror(error));

2158

2156

exitcode = EX_UNAVAILABLE;

2159

2157

goto end;

2160

2158

}

2168

2166

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

2169

2167

NULL, 0, browse_callback, NULL);

2170

2168

if(sb == NULL){

2171

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

2172

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

2173

avahi_strerror(avahi_server_errno(mc.server)));

2169

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

2170

avahi_strerror(avahi_server_errno(mc.server)));

2174

2171

exitcode = EX_UNAVAILABLE;

2175

2172

goto end;

2176

2173

}

2182

2179

/* Run the main loop */

2183

2180

2184

2181

if(debug){

2185

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

2186

"Starting Avahi loop search\n");

2182

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

2187

2183

}

2188

2184

2189

2185

ret = avahi_loop_with_timeout(mc.simple_poll,

2190

2186

(int)(retry_interval * 1000));

2191

2187

if(debug){

2192

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

2193

"avahi_loop_with_timeout exited %s\n",

2194

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

2188

fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",

2189

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

2195

2190

}

2196

2191

2197

2192

end:

2198

2193

2199

2194

if(debug){

2200

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

2201

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

2195

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

2202

2196

}

2203

2197

2204

2198

/* Cleanup things */

2220

2214

if(gpgme_initialized){

2221

2215

gpgme_release(mc.ctx);

2222

2216

}

2223

2217

2224

2218

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

2225

2219

has seen */

2226

2220

if(mc.current_server != NULL){

2232

2226

}

2233

2227

}

2234

2228

2235

/* XXX run network hooks "stop" here */

2229

/* Run network hooks */

2230

run_network_hooks("stop", interface, delay);

2236

2231

2237

/* Take down the network interface */

2238

if(take_down_interface){

2239

/* Re-raise priviliges */

2232

/* Re-raise priviliges */

2233

{

2240

2234

errno = 0;

2241

2235

ret = seteuid(0);

2242

2236

if(ret == -1){

2243

2237

perror_plus("seteuid");

2244

2238

}

2245

if(geteuid() == 0){

2239

2240

/* Take down the network interface */

2241

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

2246

2242

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

2247

2243

if(ret == -1){

2248

2244

perror_plus("ioctl SIOCGIFFLAGS");

2257

2253

if(ret == -1){

2258

2254

perror_plus("close");

2259

2255

}

2260

/* Lower privileges permanently */

2261

errno = 0;

2262

ret = setuid(uid);

2263

if(ret == -1){

2264

perror_plus("setuid");

2265

}

2266

2256

}

2267

2257

}

2258

/* Lower privileges permanently */

2259

errno = 0;

2260

ret = setuid(uid);

2261

if(ret == -1){

2262

perror_plus("setuid");

2263

}

2268

2264

2269

2265

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

2270

2266

if(tempdir_created){

2284

2280

}

2285

2281

ret = remove(fullname);

2286

2282

if(ret == -1){

2287

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

2288

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

2283

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

2284

strerror(errno));

2289

2285

}

2290

2286

free(fullname);

2291

2287

}