/mandos/release : revision 237.16.6

73

*/

74

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

75

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

76

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

76

setgid(), pause() */

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() */

91

90

92

91

#ifdef __linux__

93

92

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

175

174

perror(print_text);

176

175

}

177

176

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

187

177

/*

188

178

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

189

179

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

202

192

}

203

193

204

194

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

205

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

206

int af){

195

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

196

int af){

207

197

int ret;

208

198

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

209

199

if(new_server == NULL){

210

200

perror_plus("malloc");

211

return false;

201

return -1;

212

202

}

213

203

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

214

204

.port = port,

216

206

.af = af };

217

207

if(new_server->ip == NULL){

218

208

perror_plus("strdup");

219

return false;

209

return -1;

220

210

}

221

211

/* Special case of first server */

222

212

if (mc.current_server == NULL){

233

223

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

234

224

if(ret == -1){

235

225

perror_plus("clock_gettime");

236

return false;

226

return -1;

237

227

}

238

return true;

228

return 0;

239

229

}

240

230

241

231

/*

263

253

264

254

rc = gpgme_data_new_from_fd(&pgp_data, fd);

265

255

if(rc != GPG_ERR_NO_ERROR){

266

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

267

gpgme_strsource(rc), gpgme_strerror(rc));

256

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

257

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

258

gpgme_strsource(rc), gpgme_strerror(rc));

268

259

return false;

269

260

}

270

261

271

262

rc = gpgme_op_import(mc.ctx, pgp_data);

272

263

if(rc != GPG_ERR_NO_ERROR){

273

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

274

gpgme_strsource(rc), gpgme_strerror(rc));

264

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

265

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

266

gpgme_strsource(rc), gpgme_strerror(rc));

275

267

return false;

276

268

}

277

269

284

276

}

285

277

286

278

if(debug){

287

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

279

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

280

"Initializing GPGME\n");

288

281

}

289

282

290

283

/* Init GPGME */

291

284

gpgme_check_version(NULL);

292

285

rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

293

286

if(rc != GPG_ERR_NO_ERROR){

294

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

295

gpgme_strsource(rc), gpgme_strerror(rc));

287

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

288

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

289

gpgme_strsource(rc), gpgme_strerror(rc));

296

290

return false;

297

291

}

298

292

299

293

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

300

294

rc = gpgme_get_engine_info(&engine_info);

301

295

if(rc != GPG_ERR_NO_ERROR){

302

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

303

gpgme_strsource(rc), gpgme_strerror(rc));

296

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

297

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

298

gpgme_strsource(rc), gpgme_strerror(rc));

304

299

return false;

305

300

}

306

301

while(engine_info != NULL){

312

307

engine_info = engine_info->next;

313

308

}

314

309

if(engine_info == NULL){

315

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

316

tempdir);

310

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

311

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

317

312

return false;

318

313

}

319

314

320

315

/* Create new GPGME "context" */

321

316

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

322

317

if(rc != GPG_ERR_NO_ERROR){

323

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

324

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

325

gpgme_strerror(rc));

318

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

319

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

320

gpgme_strerror(rc));

326

321

return false;

327

322

}

328

323

347

342

ssize_t plaintext_length = 0;

348

343

349

344

if(debug){

350

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

345

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

346

"Trying to decrypt OpenPGP data\n");

351

347

}

352

348

353

349

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

354

350

rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,

355

351

0);

356

352

if(rc != GPG_ERR_NO_ERROR){

357

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

358

gpgme_strsource(rc), gpgme_strerror(rc));

353

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

354

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

355

gpgme_strsource(rc), gpgme_strerror(rc));

359

356

return -1;

360

357

}

361

358

362

359

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

363

360

rc = gpgme_data_new(&dh_plain);

364

361

if(rc != GPG_ERR_NO_ERROR){

365

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

366

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

367

gpgme_strsource(rc), gpgme_strerror(rc));

362

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

363

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

364

gpgme_strsource(rc), gpgme_strerror(rc));

368

365

gpgme_data_release(dh_crypto);

369

366

return -1;

370

367

}

373

370

data buffer */

374

371

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

375

372

if(rc != GPG_ERR_NO_ERROR){

376

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

377

gpgme_strsource(rc), gpgme_strerror(rc));

373

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

374

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

375

gpgme_strsource(rc), gpgme_strerror(rc));

378

376

plaintext_length = -1;

379

377

if(debug){

380

378

gpgme_decrypt_result_t result;

381

379

result = gpgme_op_decrypt_result(mc.ctx);

382

380

if(result == NULL){

383

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

381

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

382

"gpgme_op_decrypt_result failed\n");

384

383

} else {

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);

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);

389

390

if(result->file_name != NULL){

390

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

391

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

392

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

391

393

}

392

394

gpgme_recipient_t recipient;

393

395

recipient = result->recipients;

394

396

while(recipient != NULL){

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");

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");

402

406

recipient = recipient->next;

403

407

}

404

408

}

407

411

}

408

412

409

413

if(debug){

410

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

414

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

415

"Decryption of OpenPGP data succeeded\n");

411

416

}

412

417

413

418

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

444

449

}

445

450

446

451

if(debug){

447

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

452

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

453

"Decrypted password is: ");

448

454

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

449

455

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

450

456

}

472

478

/* GnuTLS log function callback */

473

479

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

474

480

const char* string){

475

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

481

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

476

482

}

477

483

478

484

static int init_gnutls_global(const char *pubkeyfilename,

480

486

int ret;

481

487

482

488

if(debug){

483

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

489

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

490

"Initializing GnuTLS\n");

484

491

}

485

492

486

493

ret = gnutls_global_init();

487

494

if(ret != GNUTLS_E_SUCCESS){

488

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

489

safer_gnutls_strerror(ret));

495

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

496

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

490

497

return -1;

491

498

}

492

499

501

508

/* OpenPGP credentials */

502

509

ret = gnutls_certificate_allocate_credentials(&mc.cred);

503

510

if(ret != GNUTLS_E_SUCCESS){

504

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

505

safer_gnutls_strerror(ret));

511

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

512

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

506

513

gnutls_global_deinit();

507

514

return -1;

508

515

}

509

516

510

517

if(debug){

511

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

512

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

513

pubkeyfilename,

514

seckeyfilename);

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);

515

522

}

516

523

517

524

ret = gnutls_certificate_set_openpgp_key_file

518

525

(mc.cred, pubkeyfilename, seckeyfilename,

519

526

GNUTLS_OPENPGP_FMT_BASE64);

520

527

if(ret != GNUTLS_E_SUCCESS){

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));

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));

526

534

goto globalfail;

527

535

}

528

536

529

537

/* GnuTLS server initialization */

530

538

ret = gnutls_dh_params_init(&mc.dh_params);

531

539

if(ret != GNUTLS_E_SUCCESS){

532

fprintf_plus(stderr, "Error in GnuTLS DH parameter"

533

" initialization: %s\n",

534

safer_gnutls_strerror(ret));

540

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

541

"Error in GnuTLS DH parameter initialization:"

542

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

535

543

goto globalfail;

536

544

}

537

545

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

538

546

if(ret != GNUTLS_E_SUCCESS){

539

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

540

safer_gnutls_strerror(ret));

547

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

548

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

549

safer_gnutls_strerror(ret));

541

550

goto globalfail;

542

551

}

543

552

563

572

}

564

573

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

565

574

if(ret != GNUTLS_E_SUCCESS){

566

fprintf_plus(stderr,

567

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

568

safer_gnutls_strerror(ret));

575

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

576

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

577

safer_gnutls_strerror(ret));

569

578

}

570

579

571

580

{

578

587

}

579

588

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

580

589

if(ret != GNUTLS_E_SUCCESS){

581

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

582

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

583

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));

584

594

gnutls_deinit(*session);

585

595

return -1;

586

596

}

595

605

}

596

606

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

597

607

if(ret != GNUTLS_E_SUCCESS){

598

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

599

safer_gnutls_strerror(ret));

608

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

609

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

610

safer_gnutls_strerror(ret));

600

611

gnutls_deinit(*session);

601

612

return -1;

602

613

}

647

658

pf = PF_INET;

648

659

break;

649

660

default:

650

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

661

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

662

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

651

663

errno = EINVAL;

652

664

return -1;

653

665

}

658

670

}

659

671

660

672

if(debug){

661

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

662

PRIu16 "\n", ip, port);

673

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

674

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

675

"\n", ip, port);

663

676

}

664

677

665

678

tcp_sd = socket(pf, SOCK_STREAM, 0);

691

704

}

692

705

if(ret == 0){

693

706

int e = errno;

694

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

707

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

708

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

695

709

errno = e;

696

710

goto mandos_end;

697

711

}

704

718

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

705

719

-Wunreachable-code*/

706

720

if(if_index == AVAHI_IF_UNSPEC){

707

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

708

" incomplete without a network interface\n");

721

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

722

"An IPv6 link-local address is incomplete"

723

" without a network interface\n");

709

724

errno = EINVAL;

710

725

goto mandos_end;

711

726

}

729

744

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

730

745

perror_plus("if_indextoname");

731

746

} else {

732

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

733

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

747

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

748

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

749

ip, interface, port);

734

750

}

735

751

} else {

736

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

737

ip, port);

752

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

753

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

738

754

}

739

755

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

740

756

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

750

766

perror_plus("inet_ntop");

751

767

} else {

752

768

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

753

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

769

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

770

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

754

771

}

755

772

}

756

773

}

810

827

}

811

828

812

829

if(debug){

813

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

830

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

831

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

814

832

}

815

833

816

834

if(quit_now){

836

854

837

855

if(ret != GNUTLS_E_SUCCESS){

838

856

if(debug){

839

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

857

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

858

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

840

859

gnutls_perror(ret);

841

860

}

842

861

errno = EPROTO;

846

865

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

847

866

848

867

if(debug){

849

fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"

850

" %s\n", ip);

868

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

869

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

851

870

}

852

871

853

872

while(true){

891

910

}

892

911

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

893

912

if(ret < 0){

894

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

895

"***\n");

913

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

914

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

896

915

gnutls_perror(ret);

897

916

errno = EPROTO;

898

917

goto mandos_end;

899

918

}

900

919

break;

901

920

default:

902

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

903

" encrypted session with Mandos server\n");

921

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

922

"Unknown error while reading data from"

923

" encrypted session with Mandos server\n");

904

924

gnutls_bye(session, GNUTLS_SHUT_RDWR);

905

925

errno = EIO;

906

926

goto mandos_end;

911

931

}

912

932

913

933

if(debug){

914

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

934

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

935

"Closing TLS session\n");

915

936

}

916

937

917

938

if(quit_now){

946

967

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

947

968

int e = errno;

948

969

if(debug){

949

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

950

strerror(errno));

970

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

971

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

972

strerror(errno));

951

973

}

952

974

errno = e;

953

975

goto mandos_end;

1010

1032

switch(event){

1011

1033

default:

1012

1034

case AVAHI_RESOLVER_FAILURE:

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)));

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)));

1017

1039

break;

1018

1040

1019

1041

case AVAHI_RESOLVER_FOUND:

1021

1043

char ip[AVAHI_ADDRESS_STR_MAX];

1022

1044

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

1023

1045

if(debug){

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);

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);

1027

1050

}

1028

1051

int ret = start_mandos_communication(ip, port, interface,

1029

1052

avahi_proto_to_af(proto));

1030

1053

if(ret == 0){

1031

1054

avahi_simple_poll_quit(mc.simple_poll);

1032

1055

} else {

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

}

1056

ret = add_server(ip, port, interface,

1057

avahi_proto_to_af(proto));

1038

1058

}

1039

1059

}

1040

1060

}

1064

1084

default:

1065

1085

case AVAHI_BROWSER_FAILURE:

1066

1086

1067

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

1068

avahi_strerror(avahi_server_errno(mc.server)));

1087

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

1088

"(Avahi browser) %s\n",

1089

avahi_strerror(avahi_server_errno(mc.server)));

1069

1090

avahi_simple_poll_quit(mc.simple_poll);

1070

1091

return;

1071

1092

1078

1099

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

1079

1100

name, type, domain, protocol, 0,

1080

1101

resolve_callback, NULL) == NULL)

1081

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

1082

" %s\n", name,

1083

avahi_strerror(avahi_server_errno(mc.server)));

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)));

1084

1105

break;

1085

1106

1086

1107

case AVAHI_BROWSER_REMOVE:

1089

1110

case AVAHI_BROWSER_ALL_FOR_NOW:

1090

1111

case AVAHI_BROWSER_CACHE_EXHAUSTED:

1091

1112

if(debug){

1092

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

1093

" searching...\n");

1113

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

1114

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

1094

1115

}

1095

1116

break;

1096

1117

}

1135

1156

/* Reject the loopback device */

1136

1157

if(ifr->ifr_flags & IFF_LOOPBACK){

1137

1158

if(debug){

1138

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

1139

ifname);

1159

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

1160

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

1140

1161

}

1141

1162

return false;

1142

1163

}

1143

1164

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

1144

1165

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

1145

1166

if(debug){

1146

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

1147

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

1167

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

1168

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

1148

1169

}

1149

1170

return true;

1150

1171

}

1151

1172

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

1152

1173

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

1153

1174

if(debug){

1154

fprintf_plus(stderr, "Rejecting non-broadcast interface"

1155

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

1175

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

1176

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

1156

1177

}

1157

1178

return false;

1158

1179

}

1159

1180

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

1160

1181

if(ifr->ifr_flags & IFF_NOARP){

1161

1182

if(debug){

1162

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

1163

ifname);

1183

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

1184

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

1164

1185

}

1165

1186

return false;

1166

1187

}

1167

1188

1168

1189

/* Accept this device */

1169

1190

if(debug){

1170

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

1191

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

1192

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

1171

1193

}

1172

1194

return true;

1173

1195

}

1185

1207

struct ifreq ifr;

1186

1208

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

1187

1209

if(debug){

1188

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

1189

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

1210

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

1211

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

1212

if_entry->d_name);

1190

1213

}

1191

1214

return 0;

1192

1215

}

1210

1233

struct ifreq ifr;

1211

1234

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

1212

1235

if(debug){

1213

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

1214

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

1236

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

1237

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

1238

if_entry->d_name);

1215

1239

}

1216

1240

return 0;

1217

1241

}

1219

1243

/* Reject down interfaces */

1220

1244

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

1221

1245

if(debug){

1222

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

1223

if_entry->d_name);

1246

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

1247

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

1248

if_entry->d_name);

1224

1249

}

1225

1250

return 0;

1226

1251

}

1228

1253

/* Reject non-running interfaces */

1229

1254

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

1230

1255

if(debug){

1231

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

1232

if_entry->d_name);

1256

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

1257

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

1258

if_entry->d_name);

1233

1259

}

1234

1260

return 0;

1235

1261

}

1269

1295

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

1270

1296

/* Contains non-allowed characters */

1271

1297

if(debug){

1272

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

1273

direntry->d_name);

1298

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

1299

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

1300

direntry->d_name);

1274

1301

}

1275

1302

return 0;

1276

1303

}

1292

1319

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

1293

1320

/* Not a regular file */

1294

1321

if(debug){

1295

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

1296

direntry->d_name);

1322

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

1323

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

1324

direntry->d_name);

1297

1325

}

1298

1326

return 0;

1299

1327

}

1300

1328

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

1301

1329

/* Not executable */

1302

1330

if(debug){

1303

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

1304

direntry->d_name);

1331

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

1332

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

1333

direntry->d_name);

1305

1334

}

1306

1335

return 0;

1307

1336

}

1308

if(debug){

1309

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

1310

direntry->d_name);

1311

}

1312

1337

return 1;

1313

1338

}

1314

1339

1321

1346

while(true){

1322

1347

if(mc.current_server == NULL){

1323

1348

if (debug){

1324

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

1325

" No timeout!\n");

1349

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

1350

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

1326

1351

}

1327

1352

ret = avahi_simple_poll_iterate(s, -1);

1328

1353

} else {

1329

1354

if (debug){

1330

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

1331

" it, or wait\n");

1355

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

1356

"Check current_server if we should run it,"

1357

" or wait\n");

1332

1358

}

1333

1359

/* the current time */

1334

1360

ret = clock_gettime(CLOCK_MONOTONIC, &now);

1350

1376

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

1351

1377

1352

1378

if (debug){

1353

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

1354

block_time);

1379

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

1380

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

1355

1381

}

1356

1382

1357

1383

if(block_time <= 0){

1384

1410

}

1385

1411

}

1386

1412

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

1514

1413

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

1515

1414

AvahiSServiceBrowser *sb = NULL;

1516

1415

int error;

1674

1573

argp_state_help(state, state->out_stream,

1675

1574

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1676

1575

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

1677

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

1576

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

1577

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

1678

1578

exit(argp_err_exit_status);

1679

1579

break;

1680

1580

default:

1707

1607

{

1708

1608

/* Work around Debian bug #633582:

1709

1609

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

1610

struct stat st;

1710

1611

1711

1612

/* Re-raise priviliges */

1712

1613

errno = 0;

1713

1614

ret = seteuid(0);

1714

1615

if(ret == -1){

1715

1616

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");

1716

1675

} else {

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

}

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);

1767

1758

}

1768

1759

}

1769

1760

1770

/* Run network hooks */

1771

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

1772

goto end;

1773

}

1774

1775

1761

if(not debug){

1776

1762

avahi_set_log_function(empty_log);

1777

1763

}

1791

1777

/* Pick the first interface returned */

1792

1778

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

1793

1779

if(debug){

1794

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

1780

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

1781

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

1795

1782

}

1796

1783

if(interface == NULL){

1797

1784

perror_plus("malloc");

1802

1789

free(direntries);

1803

1790

} else {

1804

1791

free(direntries);

1805

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

1792

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

1793

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

1806

1794

exitcode = EXIT_FAILURE;

1807

1795

goto end;

1808

1796

}

1814

1802

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

1815

1803

mc.simple_poll = avahi_simple_poll_new();

1816

1804

if(mc.simple_poll == NULL){

1817

fprintf_plus(stderr,

1818

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

1805

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

1806

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

1819

1807

exitcode = EX_UNAVAILABLE;

1820

1808

goto end;

1821

1809

}

1887

1875

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

1888

1876

if_index = (AvahiIfIndex) if_nametoindex(interface);

1889

1877

if(if_index == 0){

1890

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

1878

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

1879

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

1891

1880

exitcode = EX_UNAVAILABLE;

1892

1881

goto end;

1893

1882

}

2013

2002

#endif /* __linux__ */

2014

2003

/* Lower privileges */

2015

2004

errno = 0;

2016

/* Lower privileges */

2017

ret = seteuid(uid);

2018

if(ret == -1){

2019

perror_plus("seteuid");

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

}

2020

2017

}

2021

2018

}

2022

2019

2026

2023

2027

2024

ret = init_gnutls_global(pubkey, seckey);

2028

2025

if(ret == -1){

2029

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

2026

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

2027

"init_gnutls_global failed\n");

2030

2028

exitcode = EX_UNAVAILABLE;

2031

2029

goto end;

2032

2030

} else {

2048

2046

}

2049

2047

2050

2048

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

2051

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

2049

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

2050

"init_gpgme failed\n");

2052

2051

exitcode = EX_UNAVAILABLE;

2053

2052

goto end;

2054

2053

} else {

2064

2063

/* (Mainly meant for debugging) */

2065

2064

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

2066

2065

if(address == NULL){

2067

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

2066

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

2067

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

2081

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

2082

"Bad port number\n");

2082

2083

exitcode = EX_USAGE;

2083

2084

goto end;

2084

2085

}

2114

2115

break;

2115

2116

}

2116

2117

if(debug){

2117

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

2118

(int)retry_interval);

2118

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

2119

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

2119

2120

}

2120

2121

sleep((int)retry_interval);

2121

2122

}

2151

2152

2153

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

2153

2154

if(mc.server == NULL){

2154

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

2155

avahi_strerror(error));

2155

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

2156

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

2157

avahi_strerror(error));

2156

2158

exitcode = EX_UNAVAILABLE;

2157

2159

goto end;

2158

2160

}

2166

2168

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

2167

2169

NULL, 0, browse_callback, NULL);

2168

2170

if(sb == NULL){

2169

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

2170

avahi_strerror(avahi_server_errno(mc.server)));

2171

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

2172

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

2173

avahi_strerror(avahi_server_errno(mc.server)));

2171

2174

exitcode = EX_UNAVAILABLE;

2172

2175

goto end;

2173

2176

}

2179

2182

/* Run the main loop */

2180

2183

2181

2184

if(debug){

2182

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

2185

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

2186

"Starting Avahi loop search\n");

2183

2187

}

2184

2188

2185

2189

ret = avahi_loop_with_timeout(mc.simple_poll,

2186

2190

(int)(retry_interval * 1000));

2187

2191

if(debug){

2188

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

2189

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

2192

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

2193

"avahi_loop_with_timeout exited %s\n",

2194

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

2190

2195

}

2191

2196

2192

2197

end:

2193

2198

2194

2199

if(debug){

2195

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

2200

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

2201

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

2196

2202

}

2197

2203

2198

2204

/* Cleanup things */

2214

2220

if(gpgme_initialized){

2215

2221

gpgme_release(mc.ctx);

2216

2222

}

2217

2223

2218

2224

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

2219

2225

has seen */

2220

2226

if(mc.current_server != NULL){

2226

2232

}

2227

2233

}

2228

2234

2229

/* Run network hooks */

2230

run_network_hooks("stop", interface, delay);

2235

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

2231

2236

2232

/* Re-raise priviliges */

2233

{

2237

/* Take down the network interface */

2238

if(take_down_interface){

2239

/* Re-raise priviliges */

2234

2240

errno = 0;

2235

2241

ret = seteuid(0);

2236

2242

if(ret == -1){

2237

2243

perror_plus("seteuid");

2238

2244

}

2239

2240

/* Take down the network interface */

2241

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

2245

if(geteuid() == 0){

2242

2246

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

2243

2247

if(ret == -1){

2244

2248

perror_plus("ioctl SIOCGIFFLAGS");

2253

2257

if(ret == -1){

2254

2258

perror_plus("close");

2255

2259

}

2260

/* Lower privileges permanently */

2261

errno = 0;

2262

ret = setuid(uid);

2263

if(ret == -1){

2264

perror_plus("setuid");

2265

}

2256

2266

}

2257

2267

}

2258

/* Lower privileges permanently */

2259

errno = 0;

2260

ret = setuid(uid);

2261

if(ret == -1){

2262

perror_plus("setuid");

2263

}

2264

2268

2265

2269

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

2266

2270

if(tempdir_created){

2280

2284

}

2281

2285

ret = remove(fullname);

2282

2286

if(ret == -1){

2283

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

2284

strerror(errno));

2287

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

2288

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

2285

2289

}

2286

2290

free(fullname);

2287

2291

}