/mandos/release : revision 237.16.6

53

sockaddr_in6, PF_INET6,

54

SOCK_STREAM, uid_t, gid_t, open(),

55

opendir(), DIR */

56

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

56

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

57

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

58

inet_pton(), connect() */

59

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

85

raise() */

86

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

87

EX_NOHOST, EX_IOERR, EX_PROTOCOL */

88

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

89

WEXITSTATUS(), WTERMSIG() */

88

90

89

91

#ifdef __linux__

90

92

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

108

110

init_gnutls_session(),

109

111

GNUTLS_* */

110

112

#include <gnutls/openpgp.h>

111

/* gnutls_certificate_set_openpgp_key_file(),

112

GNUTLS_OPENPGP_FMT_BASE64 */

113

/* gnutls_certificate_set_openpgp_key_file(),

114

GNUTLS_OPENPGP_FMT_BASE64 */

113

115

114

116

/* GPGME */

115

117

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

131

133

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

132

134

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

133

135

char *connect_to = NULL;

136

const char *hookdir = HOOKDIR;

134

137

135

138

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

136

139

typedef struct server{

171

174

perror(print_text);

172

175

}

173

176

174

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

175

va_list ap;

176

va_start (ap, format);

177

178

TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ", program_invocation_short_name));

179

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

180

}

181

182

177

/*

183

178

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

184

179

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

185

180

* "buffer_length" is how much is already used.

186

181

*/

187

182

size_t incbuffer(char **buffer, size_t buffer_length,

188

size_t buffer_capacity){

183

size_t buffer_capacity){

189

184

if(buffer_length + BUFFER_SIZE > buffer_capacity){

190

185

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

191

186

if(buffer == NULL){

197

192

}

198

193

199

194

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

200

int add_server(const char *ip, uint16_t port,

201

AvahiIfIndex if_index,

202

int af){

195

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

196

int af){

203

197

int ret;

204

198

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

205

199

if(new_server == NULL){

207

201

return -1;

208

202

}

209

203

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

210

.port = port,

211

.if_index = if_index,

212

.af = af };

204

.port = port,

205

.if_index = if_index,

206

.af = af };

213

207

if(new_server->ip == NULL){

214

208

perror_plus("strdup");

215

209

return -1;

237

231

/*

238

232

* Initialize GPGME.

239

233

*/

240

static bool init_gpgme(const char *seckey,

241

const char *pubkey, const char *tempdir){

234

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

235

const char *tempdir){

242

236

gpgme_error_t rc;

243

237

gpgme_engine_info_t engine_info;

244

238

259

253

260

254

rc = gpgme_data_new_from_fd(&pgp_data, fd);

261

255

if(rc != GPG_ERR_NO_ERROR){

262

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

256

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

257

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

263

258

gpgme_strsource(rc), gpgme_strerror(rc));

264

259

return false;

265

260

}

266

261

267

262

rc = gpgme_op_import(mc.ctx, pgp_data);

268

263

if(rc != GPG_ERR_NO_ERROR){

269

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

264

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

265

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

270

266

gpgme_strsource(rc), gpgme_strerror(rc));

271

267

return false;

272

268

}

280

276

}

281

277

282

278

if(debug){

283

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

279

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

280

"Initializing GPGME\n");

284

281

}

285

282

286

283

/* Init GPGME */

287

284

gpgme_check_version(NULL);

288

285

rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

289

286

if(rc != GPG_ERR_NO_ERROR){

290

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

287

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

288

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

291

289

gpgme_strsource(rc), gpgme_strerror(rc));

292

290

return false;

293

291

}

295

293

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

296

294

rc = gpgme_get_engine_info(&engine_info);

297

295

if(rc != GPG_ERR_NO_ERROR){

298

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

296

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

297

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

299

298

gpgme_strsource(rc), gpgme_strerror(rc));

300

299

return false;

301

300

}

308

307

engine_info = engine_info->next;

309

308

}

310

309

if(engine_info == NULL){

311

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

310

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

311

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

312

return false;

313

}

314

315

/* Create new GPGME "context" */

316

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

317

if(rc != GPG_ERR_NO_ERROR){

318

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

319

gpgme_strsource(rc), gpgme_strerror(rc));

318

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

319

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

320

gpgme_strerror(rc));

320

321

return false;

321

322

}

322

323

341

342

ssize_t plaintext_length = 0;

342

343

344

if(debug){

344

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

345

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

346

"Trying to decrypt OpenPGP data\n");

345

347

}

346

348

347

349

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

348

350

rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,

349

351

0);

350

352

if(rc != GPG_ERR_NO_ERROR){

351

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

353

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

354

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

352

355

gpgme_strsource(rc), gpgme_strerror(rc));

353

356

return -1;

354

357

}

356

359

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

357

360

rc = gpgme_data_new(&dh_plain);

358

361

if(rc != GPG_ERR_NO_ERROR){

359

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

362

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

363

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

360

364

gpgme_strsource(rc), gpgme_strerror(rc));

361

365

gpgme_data_release(dh_crypto);

362

366

return -1;

366

370

data buffer */

367

371

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

368

372

if(rc != GPG_ERR_NO_ERROR){

369

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

373

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

374

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

370

375

gpgme_strsource(rc), gpgme_strerror(rc));

371

376

plaintext_length = -1;

372

377

if(debug){

373

378

gpgme_decrypt_result_t result;

374

379

result = gpgme_op_decrypt_result(mc.ctx);

375

380

if(result == NULL){

376

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

381

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

382

"gpgme_op_decrypt_result failed\n");

377

383

} else {

378

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

384

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

385

"Unsupported algorithm: %s\n",

379

386

result->unsupported_algorithm);

380

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

387

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

388

"Wrong key usage: %u\n",

381

389

result->wrong_key_usage);

382

390

if(result->file_name != NULL){

383

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

391

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

392

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

384

393

}

385

394

gpgme_recipient_t recipient;

386

395

recipient = result->recipients;

387

396

while(recipient != NULL){

388

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

397

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

398

"Public key algorithm: %s\n",

389

399

gpgme_pubkey_algo_name(recipient->pubkey_algo));

390

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

391

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

400

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

401

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

402

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

403

"Secret key available: %s\n",

392

404

recipient->status == GPG_ERR_NO_SECKEY

393

405

? "No" : "Yes");

394

406

recipient = recipient->next;

399

411

}

400

412

401

413

if(debug){

402

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

414

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

415

"Decryption of OpenPGP data succeeded\n");

403

416

}

404

417

405

418

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

412

425

*plaintext = NULL;

413

426

while(true){

414

427

plaintext_capacity = incbuffer(plaintext,

415

(size_t)plaintext_length,

416

plaintext_capacity);

428

(size_t)plaintext_length,

429

plaintext_capacity);

417

430

if(plaintext_capacity == 0){

418

perror_plus("incbuffer");

419

plaintext_length = -1;

420

goto decrypt_end;

431

perror_plus("incbuffer");

432

plaintext_length = -1;

433

goto decrypt_end;

421

434

}

422

435

423

436

ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,

436

449

}

437

450

438

451

if(debug){

439

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

452

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

453

"Decrypted password is: ");

440

454

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

441

455

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

442

456

}

464

478

/* GnuTLS log function callback */

465

479

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

466

480

const char* string){

467

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

481

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

468

482

}

469

483

470

484

static int init_gnutls_global(const char *pubkeyfilename,

472

486

int ret;

473

487

474

488

if(debug){

475

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

489

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

490

"Initializing GnuTLS\n");

476

491

}

477

492

478

493

ret = gnutls_global_init();

479

494

if(ret != GNUTLS_E_SUCCESS){

480

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

481

safer_gnutls_strerror(ret));

495

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

496

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

482

497

return -1;

483

498

}

484

499

493

508

/* OpenPGP credentials */

494

509

ret = gnutls_certificate_allocate_credentials(&mc.cred);

495

510

if(ret != GNUTLS_E_SUCCESS){

496

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

497

safer_gnutls_strerror(ret));

511

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

512

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

498

513

gnutls_global_deinit();

499

514

return -1;

500

515

}

501

516

502

517

if(debug){

503

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

518

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

519

"Attempting to use OpenPGP public key %s and"

504

520

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

505

521

seckeyfilename);

506

522

}

510

526

GNUTLS_OPENPGP_FMT_BASE64);

511

527

if(ret != GNUTLS_E_SUCCESS){

512

528

fprintf(stderr,

529

"Mandos plugin mandos-client: "

513

530

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

514

531

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

515

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

516

safer_gnutls_strerror(ret));

532

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

533

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

517

534

goto globalfail;

518

535

}

519

536

520

537

/* GnuTLS server initialization */

521

538

ret = gnutls_dh_params_init(&mc.dh_params);

522

539

if(ret != GNUTLS_E_SUCCESS){

523

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

540

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

541

"Error in GnuTLS DH parameter initialization:"

524

542

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

525

543

goto globalfail;

526

544

}

527

545

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

528

546

if(ret != GNUTLS_E_SUCCESS){

529

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

547

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

548

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

530

549

safer_gnutls_strerror(ret));

531

550

goto globalfail;

532

551

}

553

572

}

554

573

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

555

574

if(ret != GNUTLS_E_SUCCESS){

556

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

575

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

576

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

557

577

safer_gnutls_strerror(ret));

558

578

}

559

579

567

587

}

568

588

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

569

589

if(ret != GNUTLS_E_SUCCESS){

570

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

571

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

572

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));

573

594

gnutls_deinit(*session);

574

595

return -1;

575

596

}

584

605

}

585

606

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

586

607

if(ret != GNUTLS_E_SUCCESS){

587

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

608

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

609

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

588

610

safer_gnutls_strerror(ret));

589

611

gnutls_deinit(*session);

590

612

return -1;

636

658

pf = PF_INET;

637

659

break;

638

660

default:

639

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

661

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

662

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

640

663

errno = EINVAL;

641

664

return -1;

642

665

}

647

670

}

648

671

649

672

if(debug){

650

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

673

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

674

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

651

675

"\n", ip, port);

652

676

}

653

677

680

704

}

681

705

if(ret == 0){

682

706

int e = errno;

683

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

707

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

708

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

684

709

errno = e;

685

710

goto mandos_end;

686

711

}

691

716

692

717

if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */

693

718

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

694

-Wunreachable-code*/

719

-Wunreachable-code*/

695

720

if(if_index == AVAHI_IF_UNSPEC){

696

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

721

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

722

"An IPv6 link-local address is incomplete"

697

723

" without a network interface\n");

698

724

errno = EINVAL;

699

725

goto mandos_end;

718

744

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

719

745

perror_plus("if_indextoname");

720

746

} else {

721

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

747

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

748

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

722

749

ip, interface, port);

723

750

}

724

751

} else {

725

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

726

port);

752

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

753

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

727

754

}

728

755

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

729

756

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

739

766

perror_plus("inet_ntop");

740

767

} else {

741

768

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

742

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

769

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

770

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

743

771

}

744

772

}

745

773

}

773

801

while(true){

774

802

size_t out_size = strlen(out);

775

803

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

776

out_size - written));

804

out_size - written));

777

805

if(ret == -1){

778

806

int e = errno;

779

807

perror_plus("write");

799

827

}

800

828

801

829

if(debug){

802

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

830

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

831

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

803

832

}

804

833

805

834

if(quit_now){

825

854

826

855

if(ret != GNUTLS_E_SUCCESS){

827

856

if(debug){

828

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

857

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

858

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

829

859

gnutls_perror(ret);

830

860

}

831

861

errno = EPROTO;

835

865

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

836

866

837

867

if(debug){

838

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

839

ip);

868

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

869

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

840

870

}

841

871

842

872

while(true){

847

877

}

848

878

849

879

buffer_capacity = incbuffer(&buffer, buffer_length,

850

buffer_capacity);

880

buffer_capacity);

851

881

if(buffer_capacity == 0){

852

882

int e = errno;

853

883

perror_plus("incbuffer");

880

910

}

881

911

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

882

912

if(ret < 0){

883

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

913

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

914

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

884

915

gnutls_perror(ret);

885

916

errno = EPROTO;

886

917

goto mandos_end;

887

918

}

888

919

break;

889

920

default:

890

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

921

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

922

"Unknown error while reading data from"

891

923

" encrypted session with Mandos server\n");

892

924

gnutls_bye(session, GNUTLS_SHUT_RDWR);

893

925

errno = EIO;

899

931

}

900

932

901

933

if(debug){

902

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

934

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

935

"Closing TLS session\n");

903

936

}

904

937

905

938

if(quit_now){

917

950

918

951

if(buffer_length > 0){

919

952

ssize_t decrypted_buffer_size;

920

decrypted_buffer_size = pgp_packet_decrypt(buffer,

921

buffer_length,

953

decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,

922

954

&decrypted_buffer);

923

955

if(decrypted_buffer_size >= 0){

924

956

935

967

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

936

968

int e = errno;

937

969

if(debug){

938

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

970

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

971

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

939

972

strerror(errno));

940

973

}

941

974

errno = e;

999

1032

switch(event){

1000

1033

default:

1001

1034

case AVAHI_RESOLVER_FAILURE:

1002

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

1035

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

1036

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

1003

1037

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

1004

1038

avahi_strerror(avahi_server_errno(mc.server)));

1005

1039

break;

1009

1043

char ip[AVAHI_ADDRESS_STR_MAX];

1010

1044

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

1011

1045

if(debug){

1012

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

1046

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

1047

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

1013

1048

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

1014

1049

ip, (intmax_t)interface, port);

1015

1050

}

1049

1084

default:

1050

1085

case AVAHI_BROWSER_FAILURE:

1051

1086

1052

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

1087

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

1088

"(Avahi browser) %s\n",

1053

1089

avahi_strerror(avahi_server_errno(mc.server)));

1054

1090

avahi_simple_poll_quit(mc.simple_poll);

1055

1091

return;

1063

1099

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

1064

1100

name, type, domain, protocol, 0,

1065

1101

resolve_callback, NULL) == NULL)

1066

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

1102

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

1103

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

1067

1104

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

1068

1105

break;

1069

1106

1073

1110

case AVAHI_BROWSER_ALL_FOR_NOW:

1074

1111

case AVAHI_BROWSER_CACHE_EXHAUSTED:

1075

1112

if(debug){

1076

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

1113

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

1114

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

1077

1115

}

1078

1116

break;

1079

1117

}

1118

1156

/* Reject the loopback device */

1119

1157

if(ifr->ifr_flags & IFF_LOOPBACK){

1120

1158

if(debug){

1121

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

1122

ifname);

1159

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

1160

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

1123

1161

}

1124

1162

return false;

1125

1163

}

1126

1164

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

1127

1165

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

1128

1166

if(debug){

1129

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

1130

ifname);

1167

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

1168

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

1131

1169

}

1132

1170

return true;

1133

1171

}

1134

1172

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

1135

1173

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

1136

1174

if(debug){

1137

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

1138

ifname);

1175

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

1176

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

1139

1177

}

1140

1178

return false;

1141

1179

}

1142

1180

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

1143

1181

if(ifr->ifr_flags & IFF_NOARP){

1144

1182

if(debug){

1145

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

1183

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

1184

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

1146

1185

}

1147

1186

return false;

1148

1187

}

1149

1188

1150

1189

/* Accept this device */

1151

1190

if(debug){

1152

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

1191

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

1192

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

1153

1193

}

1154

1194

return true;

1155

1195

}

1160

1200

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

1161

1201

*/

1162

1202

int good_interface(const struct dirent *if_entry){

1163

int ret;

1164

1203

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

1165

1204

return 0;

1166

1205

}

1206

1167

1207

struct ifreq ifr;

1168

1169

1208

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

1209

if(debug){

1210

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

1211

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

1212

if_entry->d_name);

1213

}

1170

1214

return 0;

1171

1215

}

1172

1216

1182

1226

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

1183

1227

*/

1184

1228

int up_interface(const struct dirent *if_entry){

1185

ssize_t ssret;

1186

char *flagname = NULL;

1187

1229

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

1188

1230

return 0;

1189

1231

}

1190

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

1191

if_entry->d_name);

1192

if(ret < 0){

1193

perror_plus("asprintf");

1194

return 0;

1195

}

1196

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

1197

if(flags_fd == -1){

1198

perror_plus("open");

1199

free(flagname);

1200

return 0;

1201

}

1202

free(flagname);

1203

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

1204

/* read line from flags_fd */

1205

ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */

1206

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

1207

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

1208

if(flagstring == NULL){

1209

perror_plus("malloc");

1210

close(flags_fd);

1211

return 0;

1212

}

1213

while(to_read > 0){

1214

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

1215

(size_t)to_read));

1216

if(ssret == -1){

1217

perror_plus("read");

1218

free(flagstring);

1219

close(flags_fd);

1220

return 0;

1221

}

1222

to_read -= ssret;

1223

if(ssret == 0){

1224

break;

1225

}

1226

}

1227

close(flags_fd);

1228

intmax_t tmpmax;

1229

char *tmp;

1230

errno = 0;

1231

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

1232

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

1233

and not (isspace(*tmp)))

1234

or tmpmax != (ifreq_flags)tmpmax){

1235

if(debug){

1236

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

1237

flagstring, if_entry->d_name);

1238

}

1239

free(flagstring);

1240

return 0;

1241

}

1242

free(flagstring);

1243

ifreq_flags flags = (ifreq_flags)tmpmax;

1244

/* Reject the loopback device */

1245

if(flags & IFF_LOOPBACK){

1246

if(debug){

1247

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

1232

1233

struct ifreq ifr;

1234

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

1235

if(debug){

1236

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

1237

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

1248

1238

if_entry->d_name);

1249

1239

}

1250

1240

return 0;

1251

1241

}

1252

1242

1253

1243

/* Reject down interfaces */

1254

if(not (flags & IFF_UP)){

1255

return 0;

1256

}

1257

1258

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

1259

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

1260

if(debug){

1261

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

1262

if_entry->d_name);

1263

}

1264

return 1;

1265

}

1266

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

1267

if(not (flags & IFF_BROADCAST)){

1268

if(debug){

1269

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

1270

if_entry->d_name);

1271

}

1272

return 0;

1273

}

1274

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

1275

if(flags & IFF_NOARP){

1276

if(debug){

1277

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

1278

if_entry->d_name);

1279

}

1280

return 0;

1281

}

1282

/* Accept this device */

1283

if(debug){

1284

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

1285

if_entry->d_name);

1244

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

1245

if(debug){

1246

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

1247

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

1248

if_entry->d_name);

1249

}

1250

return 0;

1251

}

1252

1253

/* Reject non-running interfaces */

1254

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

1255

if(debug){

1256

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

1257

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

1258

if_entry->d_name);

1259

}

1260

return 0;

1261

}

1262

1263

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

1264

return 0;

1286

1265

}

1287

1266

return 1;

1288

1267

}

1301

1280

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

1302

1281

int runnable_hook(const struct dirent *direntry){

1303

1282

int ret;

1283

size_t sret;

1304

1284

struct stat st;

1305

1285

1306

1286

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

1308

1288

return 0;

1309

1289

}

1310

1290

1311

/* Save pointer to last character */

1312

char *end = strchr(direntry->d_name, '\0')-1;

1313

1314

if(*end == '~'){

1315

/* Backup name~ */

1316

return 0;

1317

}

1318

1319

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

1320

and (*end == '#')){

1321

/* Temporary #name# */

1322

return 0;

1323

}

1324

1325

/* XXX more rules here */

1326

1327

ret = stat(direntry->d_name, &st);

1291

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

1292

"abcdefghijklmnopqrstuvwxyz"

1293

"0123456789"

1294

"_-");

1295

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

1296

/* Contains non-allowed characters */

1297

if(debug){

1298

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

1299

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

1300

direntry->d_name);

1301

}

1302

return 0;

1303

}

1304

1305

char *fullname = NULL;

1306

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

1307

if(ret < 0){

1308

perror_plus("asprintf");

1309

return 0;

1310

}

1311

1312

ret = stat(fullname, &st);

1328

1313

if(ret == -1){

1329

1314

if(debug){

1330

perror_plus("Could not stat plugin");

1315

perror_plus("Could not stat hook");

1331

1316

}

1332

1317

return 0;

1333

1318

}

1334

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

1319

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

1335

1320

/* Not a regular file */

1321

if(debug){

1322

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

1323

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

1324

direntry->d_name);

1325

}

1336

1326

return 0;

1337

1327

}

1338

1328

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

1339

1329

/* Not executable */

1330

if(debug){

1331

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

1332

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

1333

direntry->d_name);

1334

}

1340

1335

return 0;

1341

1336

}

1342

1337

return 1;

1351

1346

while(true){

1352

1347

if(mc.current_server == NULL){

1353

1348

if (debug){

1354

fprintf(stderr,

1349

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

1355

1350

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

1356

1351

}

1357

1352

ret = avahi_simple_poll_iterate(s, -1);

1358

1353

} else {

1359

1354

if (debug){

1360

fprintf(stderr, "Check current_server if we should run it,"

1355

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

1356

"Check current_server if we should run it,"

1361

1357

" or wait\n");

1362

1358

}

1363

1359

/* the current time */

1380

1376

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

1381

1377

1382

1378

if (debug){

1383

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

1379

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

1380

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

1384

1381

}

1385

1382

1386

1383

if(block_time <= 0){

1406

1403

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

1407

1404

}

1408

1405

if(ret != 0){

1409

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

1406

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

1410

1407

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

1411

1408

}

1412

1409

}

1500

1497

.arg = "SECONDS",

1501

1498

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

1502

1499

.group = 2 },

1500

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

1501

.arg = "DIR",

1502

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

1503

.group = 2 },

1503

1504

/*

1504

1505

* These reproduce what we would get without ARGP_NO_HELP

1505

1506

*/

1558

1559

argp_error(state, "Bad retry interval");

1559

1560

}

1560

1561

break;

1562

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

1563

hookdir = arg;

1564

break;

1561

1565

/*

1562

1566

* These reproduce what we would get without ARGP_NO_HELP

1563

1567

*/

1569

1573

argp_state_help(state, state->out_stream,

1570

1574

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1571

1575

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

1576

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

1572

1577

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

1573

1578

exit(argp_err_exit_status);

1574

1579

break;

1663

1668

{

1664

1669

struct dirent **direntries;

1665

1670

struct dirent *direntry;

1666

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

1671

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

1667

1672

alphasort);

1668

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

1669

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

1670

direntry = direntries[0];

1671

char *fullname = NULL;

1672

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

1673

direntry->d_name);

1674

if(ret < 0){

1675

perror_plus("asprintf");

1676

continue;

1677

}

1678

pid_t hook_pid = fork();

1679

if(hook_pid == 0){

1680

/* Child */

1681

dup2(devnull, STDIN_FILENO);

1682

close(devnull);

1683

dup2(STDERR_FILENO, STDOUT_FILENO);

1684

setenv("DEVICE", interface, 1);

1685

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

1686

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

1687

/* setenv( XXX more here */

1688

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

1689

perror_plus("execl");

1690

}

1691

free(fullname);

1692

if(quit_now){

1693

goto end;

1694

}

1673

if(numhooks == -1){

1674

perror_plus("scandir");

1675

} 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);

1695

1758

}

1696

close(devnull);

1697

1759

}

1698

1760

1699

1761

if(not debug){

1702

1764

1703

1765

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

1704

1766

struct dirent **direntries;

1705

ret = scandir(sys_class_net, &direntries, good_interface,

1767

/* First look for interfaces that are up */

1768

ret = scandir(sys_class_net, &direntries, up_interface,

1706

1769

alphasort);

1770

if(ret == 0){

1771

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

1772

free(direntries);

1773

ret = scandir(sys_class_net, &direntries, good_interface,

1774

alphasort);

1775

}

1707

1776

if(ret >= 1){

1708

/* Pick the first good interface */

1777

/* Pick the first interface returned */

1709

1778

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

1710

1779

if(debug){

1711

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

1780

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

1781

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

1712

1782

}

1713

1783

if(interface == NULL){

1714

1784

perror_plus("malloc");

1719

1789

free(direntries);

1720

1790

} else {

1721

1791

free(direntries);

1722

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

1792

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

1793

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

1723

1794

exitcode = EXIT_FAILURE;

1724

1795

goto end;

1725

1796

}

1731

1802

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

1732

1803

mc.simple_poll = avahi_simple_poll_new();

1733

1804

if(mc.simple_poll == NULL){

1734

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

1805

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

1806

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

1735

1807

exitcode = EX_UNAVAILABLE;

1736

1808

goto end;

1737

1809

}

1803

1875

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

1804

1876

if_index = (AvahiIfIndex) if_nametoindex(interface);

1805

1877

if(if_index == 0){

1806

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

1878

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

1879

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

1807

1880

exitcode = EX_UNAVAILABLE;

1808

1881

goto end;

1809

1882

}

1950

2023

1951

2024

ret = init_gnutls_global(pubkey, seckey);

1952

2025

if(ret == -1){

1953

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

2026

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

2027

"init_gnutls_global failed\n");

1954

2028

exitcode = EX_UNAVAILABLE;

1955

2029

goto end;

1956

2030

} else {

1972

2046

}

1973

2047

1974

2048

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

1975

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

2049

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

2050

"init_gpgme failed\n");

1976

2051

exitcode = EX_UNAVAILABLE;

1977

2052

goto end;

1978

2053

} else {

1988

2063

/* (Mainly meant for debugging) */

1989

2064

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

1990

2065

if(address == NULL){

1991

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

2066

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

2067

"No colon in address\n");

1992

2068

exitcode = EX_USAGE;

1993

2069

goto end;

1994

2070

}

2002

2078

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

2003

2079

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

2004

2080

or tmpmax != (uint16_t)tmpmax){

2005

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

2081

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

2082

"Bad port number\n");

2006

2083

exitcode = EX_USAGE;

2007

2084

goto end;

2008

2085

}

2038

2115

break;

2039

2116

}

2040

2117

if(debug){

2041

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

2042

(int)retry_interval);

2118

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

2119

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

2043

2120

}

2044

2121

sleep((int)retry_interval);

2045

2122

}

2075

2152

2076

2153

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

2077

2154

if(mc.server == NULL){

2078

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

2155

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

2156

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

2079

2157

avahi_strerror(error));

2080

2158

exitcode = EX_UNAVAILABLE;

2081

2159

goto end;

2090

2168

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

2091

2169

NULL, 0, browse_callback, NULL);

2092

2170

if(sb == NULL){

2093

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

2171

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

2172

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

2094

2173

avahi_strerror(avahi_server_errno(mc.server)));

2095

2174

exitcode = EX_UNAVAILABLE;

2096

2175

goto end;

2103

2182

/* Run the main loop */

2104

2183

2105

2184

if(debug){

2106

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

2185

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

2186

"Starting Avahi loop search\n");

2107

2187

}

2108

2188

2109

2189

ret = avahi_loop_with_timeout(mc.simple_poll,

2110

2190

(int)(retry_interval * 1000));

2111

2191

if(debug){

2112

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

2192

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

2193

"avahi_loop_with_timeout exited %s\n",

2113

2194

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

2114

2195

}

2115

2196

2116

2197

end:

2117

2198

2118

2199

if(debug){

2119

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

2200

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

2201

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

2120

2202

}

2121

2203

2122

2204

/* Cleanup things */

2164

2246

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

2165

2247

if(ret == -1){

2166

2248

perror_plus("ioctl SIOCGIFFLAGS");

2167

} else if(network.ifr_flags & IFF_UP) {

2249

} else if(network.ifr_flags & IFF_UP){

2168

2250

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

2169

2251

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

2170

2252

if(ret == -1){

2202

2284

}

2203

2285

ret = remove(fullname);

2204

2286

if(ret == -1){

2205

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

2206

strerror(errno));

2287

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

2288

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

2207

2289

}

2208

2290

free(fullname);

2209

2291

}