/mandos/trunk : revision 505.3.7

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

__attribute__((format (gnu_printf, 2, 3)))

179

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

180

va_list ap;

181

va_start (ap, format);

182

183

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

184

program_invocation_short_name));

185

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

186

}

187

188

177

/*

189

178

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

190

179

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

203

192

}

204

193

205

194

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

206

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

207

int af){

195

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

196

int af){

208

197

int ret;

209

198

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

210

199

if(new_server == NULL){

211

200

perror_plus("malloc");

212

return false;

201

return -1;

213

202

}

214

203

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

215

204

.port = port,

217

206

.af = af };

218

207

if(new_server->ip == NULL){

219

208

perror_plus("strdup");

220

return false;

209

return -1;

221

210

}

222

211

/* Special case of first server */

223

212

if (mc.current_server == NULL){

234

223

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

235

224

if(ret == -1){

236

225

perror_plus("clock_gettime");

237

return false;

226

return -1;

238

227

}

239

return true;

228

return 0;

240

229

}

241

230

242

231

/*

264

253

265

254

rc = gpgme_data_new_from_fd(&pgp_data, fd);

266

255

if(rc != GPG_ERR_NO_ERROR){

267

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

268

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));

269

259

return false;

270

260

}

271

261

272

262

rc = gpgme_op_import(mc.ctx, pgp_data);

273

263

if(rc != GPG_ERR_NO_ERROR){

274

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

275

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));

276

267

return false;

277

268

}

278

269

285

276

}

286

277

287

278

if(debug){

288

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

279

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

280

"Initializing GPGME\n");

289

281

}

290

282

291

283

/* Init GPGME */

292

284

gpgme_check_version(NULL);

293

285

rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

294

286

if(rc != GPG_ERR_NO_ERROR){

295

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

296

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));

297

290

return false;

298

291

}

299

292

300

293

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

301

294

rc = gpgme_get_engine_info(&engine_info);

302

295

if(rc != GPG_ERR_NO_ERROR){

303

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

304

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));

305

299

return false;

306

300

}

307

301

while(engine_info != NULL){

313

307

engine_info = engine_info->next;

314

308

}

315

309

if(engine_info == NULL){

316

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

317

tempdir);

310

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

311

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

318

312

return false;

319

313

}

320

314

321

315

/* Create new GPGME "context" */

322

316

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

323

317

if(rc != GPG_ERR_NO_ERROR){

324

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

325

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

326

gpgme_strerror(rc));

318

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

319

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

320

gpgme_strerror(rc));

327

321

return false;

328

322

}

329

323

348

342

ssize_t plaintext_length = 0;

349

343

350

344

if(debug){

351

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

345

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

346

"Trying to decrypt OpenPGP data\n");

352

347

}

353

348

354

349

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

355

350

rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,

356

351

0);

357

352

if(rc != GPG_ERR_NO_ERROR){

358

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

359

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));

360

356

return -1;

361

357

}

362

358

363

359

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

364

360

rc = gpgme_data_new(&dh_plain);

365

361

if(rc != GPG_ERR_NO_ERROR){

366

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

367

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

368

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));

369

365

gpgme_data_release(dh_crypto);

370

366

return -1;

371

367

}

374

370

data buffer */

375

371

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

376

372

if(rc != GPG_ERR_NO_ERROR){

377

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

378

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));

379

376

plaintext_length = -1;

380

377

if(debug){

381

378

gpgme_decrypt_result_t result;

382

379

result = gpgme_op_decrypt_result(mc.ctx);

383

380

if(result == NULL){

384

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

381

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

382

"gpgme_op_decrypt_result failed\n");

385

383

} else {

386

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

387

result->unsupported_algorithm);

388

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

389

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);

390

if(result->file_name != NULL){

391

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);

392

393

}

393

394

gpgme_recipient_t recipient;

394

395

recipient = result->recipients;

395

396

while(recipient != NULL){

396

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

397

gpgme_pubkey_algo_name

398

(recipient->pubkey_algo));

399

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

400

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

401

recipient->status == GPG_ERR_NO_SECKEY

402

? "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");

403

406

recipient = recipient->next;

404

407

}

405

408

}

408

411

}

409

412

410

413

if(debug){

411

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

414

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

415

"Decryption of OpenPGP data succeeded\n");

412

416

}

413

417

414

418

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

445

449

}

446

450

447

451

if(debug){

448

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

452

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

453

"Decrypted password is: ");

449

454

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

450

455

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

451

456

}

473

478

/* GnuTLS log function callback */

474

479

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

475

480

const char* string){

476

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

481

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

477

482

}

478

483

479

484

static int init_gnutls_global(const char *pubkeyfilename,

481

486

int ret;

482

487

483

488

if(debug){

484

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

489

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

490

"Initializing GnuTLS\n");

485

491

}

486

492

487

493

ret = gnutls_global_init();

488

494

if(ret != GNUTLS_E_SUCCESS){

489

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

490

safer_gnutls_strerror(ret));

495

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

496

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

491

497

return -1;

492

498

}

493

499

502

508

/* OpenPGP credentials */

503

509

ret = gnutls_certificate_allocate_credentials(&mc.cred);

504

510

if(ret != GNUTLS_E_SUCCESS){

505

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

506

safer_gnutls_strerror(ret));

511

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

512

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

507

513

gnutls_global_deinit();

508

514

return -1;

509

515

}

510

516

511

517

if(debug){

512

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

513

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

514

pubkeyfilename,

515

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);

516

522

}

517

523

518

524

ret = gnutls_certificate_set_openpgp_key_file

519

525

(mc.cred, pubkeyfilename, seckeyfilename,

520

526

GNUTLS_OPENPGP_FMT_BASE64);

521

527

if(ret != GNUTLS_E_SUCCESS){

522

fprintf_plus(stderr,

523

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

524

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

525

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

526

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));

527

534

goto globalfail;

528

535

}

529

536

530

537

/* GnuTLS server initialization */

531

538

ret = gnutls_dh_params_init(&mc.dh_params);

532

539

if(ret != GNUTLS_E_SUCCESS){

533

fprintf_plus(stderr, "Error in GnuTLS DH parameter"

534

" initialization: %s\n",

535

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));

536

543

goto globalfail;

537

544

}

538

545

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

539

546

if(ret != GNUTLS_E_SUCCESS){

540

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

541

safer_gnutls_strerror(ret));

547

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

548

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

549

safer_gnutls_strerror(ret));

542

550

goto globalfail;

543

551

}

544

552

564

572

}

565

573

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

566

574

if(ret != GNUTLS_E_SUCCESS){

567

fprintf_plus(stderr,

568

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

569

safer_gnutls_strerror(ret));

575

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

576

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

577

safer_gnutls_strerror(ret));

570

578

}

571

579

572

580

{

579

587

}

580

588

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

581

589

if(ret != GNUTLS_E_SUCCESS){

582

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

583

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

584

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));

585

594

gnutls_deinit(*session);

586

595

return -1;

587

596

}

596

605

}

597

606

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

598

607

if(ret != GNUTLS_E_SUCCESS){

599

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

600

safer_gnutls_strerror(ret));

608

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

609

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

610

safer_gnutls_strerror(ret));

601

611

gnutls_deinit(*session);

602

612

return -1;

603

613

}

648

658

pf = PF_INET;

649

659

break;

650

660

default:

651

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

661

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

662

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

652

663

errno = EINVAL;

653

664

return -1;

654

665

}

659

670

}

660

671

661

672

if(debug){

662

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

663

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);

664

676

}

665

677

666

678

tcp_sd = socket(pf, SOCK_STREAM, 0);

692

704

}

693

705

if(ret == 0){

694

706

int e = errno;

695

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

707

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

708

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

696

709

errno = e;

697

710

goto mandos_end;

698

711

}

705

718

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

706

719

-Wunreachable-code*/

707

720

if(if_index == AVAHI_IF_UNSPEC){

708

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

709

" 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");

710

724

errno = EINVAL;

711

725

goto mandos_end;

712

726

}

730

744

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

731

745

perror_plus("if_indextoname");

732

746

} else {

733

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

734

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

747

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

748

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

749

ip, interface, port);

735

750

}

736

751

} else {

737

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

738

ip, port);

752

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

753

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

739

754

}

740

755

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

741

756

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

751

766

perror_plus("inet_ntop");

752

767

} else {

753

768

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

754

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

769

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

770

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

755

771

}

756

772

}

757

773

}

811

827

}

812

828

813

829

if(debug){

814

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);

815

832

}

816

833

817

834

if(quit_now){

837

854

838

855

if(ret != GNUTLS_E_SUCCESS){

839

856

if(debug){

840

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

857

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

858

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

841

859

gnutls_perror(ret);

842

860

}

843

861

errno = EPROTO;

847

865

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

848

866

849

867

if(debug){

850

fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"

851

" %s\n", ip);

868

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

869

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

852

870

}

853

871

854

872

while(true){

892

910

}

893

911

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

894

912

if(ret < 0){

895

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

896

"***\n");

913

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

914

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

897

915

gnutls_perror(ret);

898

916

errno = EPROTO;

899

917

goto mandos_end;

900

918

}

901

919

break;

902

920

default:

903

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

904

" 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");

905

924

gnutls_bye(session, GNUTLS_SHUT_RDWR);

906

925

errno = EIO;

907

926

goto mandos_end;

912

931

}

913

932

914

933

if(debug){

915

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

934

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

935

"Closing TLS session\n");

916

936

}

917

937

918

938

if(quit_now){

947

967

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

948

968

int e = errno;

949

969

if(debug){

950

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

951

strerror(errno));

970

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

971

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

972

strerror(errno));

952

973

}

953

974

errno = e;

954

975

goto mandos_end;

1011

1032

switch(event){

1012

1033

default:

1013

1034

case AVAHI_RESOLVER_FAILURE:

1014

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

1015

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

1016

domain,

1017

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)));

1018

1039

break;

1019

1040

1020

1041

case AVAHI_RESOLVER_FOUND:

1022

1043

char ip[AVAHI_ADDRESS_STR_MAX];

1023

1044

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

1024

1045

if(debug){

1025

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

1026

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

1027

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);

1028

1050

}

1029

1051

int ret = start_mandos_communication(ip, port, interface,

1030

1052

avahi_proto_to_af(proto));

1031

1053

if(ret == 0){

1032

1054

avahi_simple_poll_quit(mc.simple_poll);

1033

1055

} else {

1034

if(not add_server(ip, port, interface,

1035

avahi_proto_to_af(proto))){

1036

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

1037

" list\n", name);

1038

}

1056

ret = add_server(ip, port, interface,

1057

avahi_proto_to_af(proto));

1039

1058

}

1040

1059

}

1041

1060

}

1065

1084

default:

1066

1085

case AVAHI_BROWSER_FAILURE:

1067

1086

1068

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

1069

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)));

1070

1090

avahi_simple_poll_quit(mc.simple_poll);

1071

1091

return;

1072

1092

1079

1099

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

1080

1100

name, type, domain, protocol, 0,

1081

1101

resolve_callback, NULL) == NULL)

1082

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

1083

" %s\n", name,

1084

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)));

1085

1105

break;

1086

1106

1087

1107

case AVAHI_BROWSER_REMOVE:

1090

1110

case AVAHI_BROWSER_ALL_FOR_NOW:

1091

1111

case AVAHI_BROWSER_CACHE_EXHAUSTED:

1092

1112

if(debug){

1093

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

1094

" searching...\n");

1113

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

1114

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

1095

1115

}

1096

1116

break;

1097

1117

}

1136

1156

/* Reject the loopback device */

1137

1157

if(ifr->ifr_flags & IFF_LOOPBACK){

1138

1158

if(debug){

1139

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

1140

ifname);

1159

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

1160

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

1141

1161

}

1142

1162

return false;

1143

1163

}

1144

1164

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

1145

1165

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

1146

1166

if(debug){

1147

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

1148

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

1167

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

1168

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

1149

1169

}

1150

1170

return true;

1151

1171

}

1152

1172

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

1153

1173

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

1154

1174

if(debug){

1155

fprintf_plus(stderr, "Rejecting non-broadcast interface"

1156

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

1175

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

1176

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

1157

1177

}

1158

1178

return false;

1159

1179

}

1160

1180

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

1161

1181

if(ifr->ifr_flags & IFF_NOARP){

1162

1182

if(debug){

1163

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

1164

ifname);

1183

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

1184

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

1165

1185

}

1166

1186

return false;

1167

1187

}

1168

1188

1169

1189

/* Accept this device */

1170

1190

if(debug){

1171

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

1191

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

1192

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

1172

1193

}

1173

1194

return true;

1174

1195

}

1186

1207

struct ifreq ifr;

1187

1208

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

1188

1209

if(debug){

1189

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

1190

"\"%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);

1191

1213

}

1192

1214

return 0;

1193

1215

}

1211

1233

struct ifreq ifr;

1212

1234

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

1213

1235

if(debug){

1214

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

1215

"\"%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);

1216

1239

}

1217

1240

return 0;

1218

1241

}

1220

1243

/* Reject down interfaces */

1221

1244

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

1222

1245

if(debug){

1223

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

1224

if_entry->d_name);

1246

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

1247

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

1248

if_entry->d_name);

1225

1249

}

1226

1250

return 0;

1227

1251

}

1229

1253

/* Reject non-running interfaces */

1230

1254

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

1231

1255

if(debug){

1232

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

1233

if_entry->d_name);

1256

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

1257

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

1258

if_entry->d_name);

1234

1259

}

1235

1260

return 0;

1236

1261

}

1270

1295

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

1271

1296

/* Contains non-allowed characters */

1272

1297

if(debug){

1273

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

1274

direntry->d_name);

1298

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

1299

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

1300

direntry->d_name);

1275

1301

}

1276

1302

return 0;

1277

1303

}

1293

1319

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

1294

1320

/* Not a regular file */

1295

1321

if(debug){

1296

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

1297

direntry->d_name);

1322

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

1323

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

1324

direntry->d_name);

1298

1325

}

1299

1326

return 0;

1300

1327

}

1301

1328

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

1302

1329

/* Not executable */

1303

1330

if(debug){

1304

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

1305

direntry->d_name);

1331

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

1332

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

1333

direntry->d_name);

1306

1334

}

1307

1335

return 0;

1308

1336

}

1309

if(debug){

1310

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

1311

direntry->d_name);

1312

}

1313

1337

return 1;

1314

1338

}

1315

1339

1322

1346

while(true){

1323

1347

if(mc.current_server == NULL){

1324

1348

if (debug){

1325

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

1326

" No timeout!\n");

1349

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

1350

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

1327

1351

}

1328

1352

ret = avahi_simple_poll_iterate(s, -1);

1329

1353

} else {

1330

1354

if (debug){

1331

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

1332

" it, or wait\n");

1355

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

1356

"Check current_server if we should run it,"

1357

" or wait\n");

1333

1358

}

1334

1359

/* the current time */

1335

1360

ret = clock_gettime(CLOCK_MONOTONIC, &now);

1351

1376

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

1352

1377

1353

1378

if (debug){

1354

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

1355

block_time);

1379

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

1380

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

1356

1381

}

1357

1382

1358

1383

if(block_time <= 0){

1385

1410

}

1386

1411

}

1387

1412

1388

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

1389

const float delay){

1390

struct dirent **direntries;

1391

struct dirent *direntry;

1392

int ret;

1393

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

1394

alphasort);

1395

if(numhooks == -1){

1396

perror_plus("scandir");

1397

} else {

1398

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

1399

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

1400

direntry = direntries[i];

1401

char *fullname = NULL;

1402

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

1403

if(ret < 0){

1404

perror_plus("asprintf");

1405

continue;

1406

}

1407

if(debug){

1408

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

1409

direntry->d_name);

1410

}

1411

pid_t hook_pid = fork();

1412

if(hook_pid == 0){

1413

/* Child */

1414

/* Raise privileges */

1415

errno = 0;

1416

ret = seteuid(0);

1417

if(ret == -1){

1418

perror_plus("seteuid");

1419

}

1420

/* Raise privileges even more */

1421

errno = 0;

1422

ret = setuid(0);

1423

if(ret == -1){

1424

perror_plus("setuid");

1425

}

1426

/* Set group */

1427

errno = 0;

1428

ret = setgid(0);

1429

if(ret == -1){

1430

perror_plus("setgid");

1431

}

1432

/* Reset supplementary groups */

1433

errno = 0;

1434

ret = setgroups(0, NULL);

1435

if(ret == -1){

1436

perror_plus("setgroups");

1437

}

1438

dup2(devnull, STDIN_FILENO);

1439

close(devnull);

1440

dup2(STDERR_FILENO, STDOUT_FILENO);

1441

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

1442

if(ret == -1){

1443

perror_plus("setenv");

1444

_exit(EX_OSERR);

1445

}

1446

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

1447

if(ret == -1){

1448

perror_plus("setenv");

1449

_exit(EX_OSERR);

1450

}

1451

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

1452

if(ret == -1){

1453

perror_plus("setenv");

1454

_exit(EX_OSERR);

1455

}

1456

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

1457

if(ret == -1){

1458

perror_plus("setenv");

1459

_exit(EX_OSERR);

1460

}

1461

char *delaystring;

1462

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

1463

if(ret == -1){

1464

perror_plus("asprintf");

1465

_exit(EX_OSERR);

1466

}

1467

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

1468

if(ret == -1){

1469

free(delaystring);

1470

perror_plus("setenv");

1471

_exit(EX_OSERR);

1472

}

1473

free(delaystring);

1474

if(execl(fullname, direntry->d_name, mode, NULL) == -1){

1475

perror_plus("execl");

1476

_exit(EXIT_FAILURE);

1477

}

1478

} else {

1479

int status;

1480

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

1481

perror_plus("waitpid");

1482

free(fullname);

1483

continue;

1484

}

1485

if(WIFEXITED(status)){

1486

if(WEXITSTATUS(status) != 0){

1487

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

1488

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

1489

WEXITSTATUS(status));

1490

free(fullname);

1491

continue;

1492

}

1493

} else if(WIFSIGNALED(status)){

1494

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

1495

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

1496

WTERMSIG(status));

1497

free(fullname);

1498

continue;

1499

} else {

1500

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

1501

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

1502

free(fullname);

1503

continue;

1504

}

1505

}

1506

free(fullname);

1507

if(debug){

1508

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

1509

direntry->d_name);

1510

}

1511

}

1512

close(devnull);

1513

}

1514

return true;

1515

}

1516

1517

1413

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

1518

1414

AvahiSServiceBrowser *sb = NULL;

1519

1415

int error;

1677

1573

argp_state_help(state, state->out_stream,

1678

1574

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1679

1575

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

1680

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);

1681

1578

exit(argp_err_exit_status);

1682

1579

break;

1683

1580

default:

1710

1607

{

1711

1608

/* Work around Debian bug #633582:

1712

1609

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

1610

struct stat st;

1713

1611

1714

1612

/* Re-raise priviliges */

1715

1613

errno = 0;

1716

1614

ret = seteuid(0);

1717

1615

if(ret == -1){

1718

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");

1719

1675

} else {

1720

struct stat st;

1721

1722

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

1723

int seckey_fd = open(seckey, O_RDONLY);

1724

if(seckey_fd == -1){

1725

perror_plus("open");

1726

} else {

1727

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

1728

if(ret == -1){

1729

perror_plus("fstat");

1730

} else {

1731

if(S_ISREG(st.st_mode)

1732

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

1733

ret = fchown(seckey_fd, uid, gid);

1734

if(ret == -1){

1735

perror_plus("fchown");

1736

}

1737

}

1738

}

1739

TEMP_FAILURE_RETRY(close(seckey_fd));

1740

}

1741

}

1742

1743

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

1744

int pubkey_fd = open(pubkey, O_RDONLY);

1745

if(pubkey_fd == -1){

1746

perror_plus("open");

1747

} else {

1748

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

1749

if(ret == -1){

1750

perror_plus("fstat");

1751

} else {

1752

if(S_ISREG(st.st_mode)

1753

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

1754

ret = fchown(pubkey_fd, uid, gid);

1755

if(ret == -1){

1756

perror_plus("fchown");

1757

}

1758

}

1759

}

1760

TEMP_FAILURE_RETRY(close(pubkey_fd));

1761

}

1762

}

1763

1764

/* Lower privileges */

1765

errno = 0;

1766

ret = seteuid(uid);

1767

if(ret == -1){

1768

perror_plus("seteuid");

1769

}

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("MANDOSNETHOOKDIR", hookdir, 1);

1692

if(ret == -1){

1693

perror_plus("setenv");

1694

exit(1);

1695

}

1696

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

1697

if(ret == -1){

1698

perror_plus("setenv");

1699

exit(1);

1700

}

1701

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

1702

if(ret == -1){

1703

perror_plus("setenv");

1704

exit(1);

1705

}

1706

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

1707

if(ret == -1){

1708

perror_plus("setenv");

1709

exit(1);

1710

}

1711

char *delaystring;

1712

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

1713

if(ret == -1){

1714

perror_plus("asprintf");

1715

exit(1);

1716

}

1717

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

1718

if(ret == -1){

1719

free(delaystring);

1720

perror_plus("setenv");

1721

exit(1);

1722

}

1723

free(delaystring);

1724

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

1725

perror_plus("execl");

1726

} else {

1727

int status;

1728

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

1729

perror_plus("waitpid");

1730

free(fullname);

1731

continue;

1732

}

1733

if(WIFEXITED(status)){

1734

if(WEXITSTATUS(status) != 0){

1735

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

1736

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

1737

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

1738

WEXITSTATUS(status));

1739

free(fullname);

1740

continue;

1741

}

1742

} else if(WIFSIGNALED(status)){

1743

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

1744

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

1745

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

1746

WTERMSIG(status));

1747

free(fullname);

1748

continue;

1749

} else {

1750

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

1751

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

1752

direntry->d_name);

1753

free(fullname);

1754

continue;

1755

}

1756

}

1757

free(fullname);

1758

if(quit_now){

1759

goto end;

1760

}

1761

}

1762

close(devnull);

1770

1763

}

1771

1764

}

1772

1765

1773

/* Run network hooks */

1774

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

1775

goto end;

1776

}

1777

1778

1766

if(not debug){

1779

1767

avahi_set_log_function(empty_log);

1780

1768

}

1794

1782

/* Pick the first interface returned */

1795

1783

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

1796

1784

if(debug){

1797

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

1785

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

1786

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

1798

1787

}

1799

1788

if(interface == NULL){

1800

1789

perror_plus("malloc");

1805

1794

free(direntries);

1806

1795

} else {

1807

1796

free(direntries);

1808

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

1797

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

1798

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

1809

1799

exitcode = EXIT_FAILURE;

1810

1800

goto end;

1811

1801

}

1817

1807

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

1818

1808

mc.simple_poll = avahi_simple_poll_new();

1819

1809

if(mc.simple_poll == NULL){

1820

fprintf_plus(stderr,

1821

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

1810

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

1811

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

1822

1812

exitcode = EX_UNAVAILABLE;

1823

1813

goto end;

1824

1814

}

1890

1880

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

1891

1881

if_index = (AvahiIfIndex) if_nametoindex(interface);

1892

1882

if(if_index == 0){

1893

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

1883

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

1884

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

1894

1885

exitcode = EX_UNAVAILABLE;

1895

1886

goto end;

1896

1887

}

2016

2007

#endif /* __linux__ */

2017

2008

/* Lower privileges */

2018

2009

errno = 0;

2019

/* Lower privileges */

2020

ret = seteuid(uid);

2021

if(ret == -1){

2022

perror_plus("seteuid");

2010

if(take_down_interface){

2011

/* Lower privileges */

2012

ret = seteuid(uid);

2013

if(ret == -1){

2014

perror_plus("seteuid");

2015

}

2016

} else {

2017

/* Lower privileges permanently */

2018

ret = setuid(uid);

2019

if(ret == -1){

2020

perror_plus("setuid");

2021

}

2023

2022

}

2024

2023

}

2025

2024

2029

2028

2030

2029

ret = init_gnutls_global(pubkey, seckey);

2031

2030

if(ret == -1){

2032

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

2031

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

2032

"init_gnutls_global failed\n");

2033

exitcode = EX_UNAVAILABLE;

2034

goto end;

2035

} else {

2051

}

2052

2053

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

2054

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

2054

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

2055

"init_gpgme failed\n");

2055

2056

exitcode = EX_UNAVAILABLE;

2056

2057

goto end;

2057

2058

} else {

2067

2068

/* (Mainly meant for debugging) */

2068

2069

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

2069

2070

if(address == NULL){

2070

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

2071

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

2072

"No colon in address\n");

2071

2073

exitcode = EX_USAGE;

2072

2074

goto end;

2073

2075

}

2081

2083

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

2082

2084

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

2083

2085

or tmpmax != (uint16_t)tmpmax){

2084

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

2086

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

2087

"Bad port number\n");

2085

2088

exitcode = EX_USAGE;

2086

2089

goto end;

2087

2090

}

2117

2120

break;

2118

2121

}

2119

2122

if(debug){

2120

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

2121

(int)retry_interval);

2123

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

2124

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

2122

2125

}

2123

2126

sleep((int)retry_interval);

2124

2127

}

2154

2157

2155

2158

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

2156

2159

if(mc.server == NULL){

2157

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

2158

avahi_strerror(error));

2160

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

2161

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

2162

avahi_strerror(error));

2159

2163

exitcode = EX_UNAVAILABLE;

2160

2164

goto end;

2161

2165

}

2169

2173

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

2170

2174

NULL, 0, browse_callback, NULL);

2171

2175

if(sb == NULL){

2172

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

2173

avahi_strerror(avahi_server_errno(mc.server)));

2176

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

2177

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

2178

avahi_strerror(avahi_server_errno(mc.server)));

2174

2179

exitcode = EX_UNAVAILABLE;

2175

2180

goto end;

2176

2181

}

2182

2187

/* Run the main loop */

2183

2188

2184

2189

if(debug){

2185

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

2190

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

2191

"Starting Avahi loop search\n");

2186

2192

}

2187

2193

2188

2194

ret = avahi_loop_with_timeout(mc.simple_poll,

2189

2195

(int)(retry_interval * 1000));

2190

2196

if(debug){

2191

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

2192

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

2197

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

2198

"avahi_loop_with_timeout exited %s\n",

2199

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

2193

2200

}

2194

2201

2195

2202

end:

2196

2203

2197

2204

if(debug){

2198

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

2205

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

2206

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

2199

2207

}

2200

2208

2201

2209

/* Cleanup things */

2217

2225

if(gpgme_initialized){

2218

2226

gpgme_release(mc.ctx);

2219

2227

}

2220

2228

2221

2229

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

2222

2230

has seen */

2223

2231

if(mc.current_server != NULL){

2229

2237

}

2230

2238

}

2231

2239

2232

/* Run network hooks */

2233

run_network_hooks("stop", interface, delay);

2240

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

2234

2241

2235

/* Re-raise priviliges */

2236

{

2242

/* Take down the network interface */

2243

if(take_down_interface){

2244

/* Re-raise priviliges */

2237

2245

errno = 0;

2238

2246

ret = seteuid(0);

2239

2247

if(ret == -1){

2240

2248

perror_plus("seteuid");

2241

2249

}

2242

2243

/* Take down the network interface */

2244

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

2250

if(geteuid() == 0){

2245

2251

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

2246

2252

if(ret == -1){

2247

2253

perror_plus("ioctl SIOCGIFFLAGS");

2256

2262

if(ret == -1){

2257

2263

perror_plus("close");

2258

2264

}

2265

/* Lower privileges permanently */

2266

errno = 0;

2267

ret = setuid(uid);

2268

if(ret == -1){

2269

perror_plus("setuid");

2270

}

2259

2271

}

2260

2272

}

2261

/* Lower privileges permanently */

2262

errno = 0;

2263

ret = setuid(uid);

2264

if(ret == -1){

2265

perror_plus("setuid");

2266

}

2267

2273

2268

2274

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

2269

2275

if(tempdir_created){

2283

2289

}

2284

2290

ret = remove(fullname);

2285

2291

if(ret == -1){

2286

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

2287

strerror(errno));

2292

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

2293

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

2288

2294

}

2289

2295

free(fullname);

2290

2296

}