/mandos/trunk : revision 505.3.5

26

* along with this program. If not, see

27

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

28

*

29

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

29

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

30

*/

31

32

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

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() */

123

125

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

124

126

#define SECKEY "seckey.txt"

125

127

#define PUBKEY "pubkey.txt"

128

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

126

129

127

130

bool debug = false;

128

131

static const char mandos_protocol_version[] = "1";

129

132

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

130

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

133

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

131

134

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

132

135

char *connect_to = NULL;

136

const char *hookdir = HOOKDIR;

133

137

134

138

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

135

139

typedef struct server{

187

191

return buffer_capacity;

188

192

}

189

193

194

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

190

195

int add_server(const char *ip, uint16_t port,

191

196

AvahiIfIndex if_index,

192

197

int af){

204

209

perror_plus("strdup");

205

210

return -1;

206

211

}

207

/* unique case of first server */

212

/* Special case of first server */

208

213

if (mc.current_server == NULL){

209

214

new_server->next = new_server;

210

215

new_server->prev = new_server;

211

216

mc.current_server = new_server;

212

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

217

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

213

218

} else {

214

219

new_server->next = mc.current_server;

215

220

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

249

254

250

255

rc = gpgme_data_new_from_fd(&pgp_data, fd);

251

256

if(rc != GPG_ERR_NO_ERROR){

252

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

257

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

258

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

253

259

gpgme_strsource(rc), gpgme_strerror(rc));

254

260

return false;

255

261

}

256

262

257

263

rc = gpgme_op_import(mc.ctx, pgp_data);

258

264

if(rc != GPG_ERR_NO_ERROR){

259

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

265

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

266

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

260

267

gpgme_strsource(rc), gpgme_strerror(rc));

261

268

return false;

262

269

}

270

277

}

271

278

272

279

if(debug){

273

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

280

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

281

"Initializing GPGME\n");

274

282

}

275

283

276

284

/* Init GPGME */

277

285

gpgme_check_version(NULL);

278

286

rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

279

287

if(rc != GPG_ERR_NO_ERROR){

280

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

288

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

289

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

281

290

gpgme_strsource(rc), gpgme_strerror(rc));

282

291

return false;

283

292

}

284

293

285

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

294

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

286

295

rc = gpgme_get_engine_info(&engine_info);

287

296

if(rc != GPG_ERR_NO_ERROR){

288

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

297

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

298

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

289

299

gpgme_strsource(rc), gpgme_strerror(rc));

290

300

return false;

291

301

}

298

308

engine_info = engine_info->next;

299

309

}

300

310

if(engine_info == NULL){

301

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

311

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

312

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

302

313

return false;

303

314

}

304

315

305

316

/* Create new GPGME "context" */

306

317

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

307

318

if(rc != GPG_ERR_NO_ERROR){

308

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

309

gpgme_strsource(rc), gpgme_strerror(rc));

319

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

320

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

321

gpgme_strerror(rc));

310

322

return false;

311

323

}

312

324

331

343

ssize_t plaintext_length = 0;

332

344

333

345

if(debug){

334

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

346

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

347

"Trying to decrypt OpenPGP data\n");

335

348

}

336

349

337

350

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

338

351

rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,

339

352

0);

340

353

if(rc != GPG_ERR_NO_ERROR){

341

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

354

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

355

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

342

356

gpgme_strsource(rc), gpgme_strerror(rc));

343

357

return -1;

344

358

}

346

360

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

347

361

rc = gpgme_data_new(&dh_plain);

348

362

if(rc != GPG_ERR_NO_ERROR){

349

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

363

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

364

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

350

365

gpgme_strsource(rc), gpgme_strerror(rc));

351

366

gpgme_data_release(dh_crypto);

352

367

return -1;

356

371

data buffer */

357

372

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

358

373

if(rc != GPG_ERR_NO_ERROR){

359

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

374

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

375

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

360

376

gpgme_strsource(rc), gpgme_strerror(rc));

361

377

plaintext_length = -1;

362

378

if(debug){

363

379

gpgme_decrypt_result_t result;

364

380

result = gpgme_op_decrypt_result(mc.ctx);

365

381

if(result == NULL){

366

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

382

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

383

"gpgme_op_decrypt_result failed\n");

367

384

} else {

368

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

385

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

386

"Unsupported algorithm: %s\n",

369

387

result->unsupported_algorithm);

370

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

388

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

389

"Wrong key usage: %u\n",

371

390

result->wrong_key_usage);

372

391

if(result->file_name != NULL){

373

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

392

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

393

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

374

394

}

375

395

gpgme_recipient_t recipient;

376

396

recipient = result->recipients;

377

397

while(recipient != NULL){

378

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

398

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

399

"Public key algorithm: %s\n",

379

400

gpgme_pubkey_algo_name(recipient->pubkey_algo));

380

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

381

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

401

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

402

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

403

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

404

"Secret key available: %s\n",

382

405

recipient->status == GPG_ERR_NO_SECKEY

383

406

? "No" : "Yes");

384

407

recipient = recipient->next;

389

412

}

390

413

391

414

if(debug){

392

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

415

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

416

"Decryption of OpenPGP data succeeded\n");

393

417

}

394

418

395

419

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

426

450

}

427

451

428

452

if(debug){

429

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

453

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

454

"Decrypted password is: ");

430

455

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

431

456

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

432

457

}

454

479

/* GnuTLS log function callback */

455

480

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

456

481

const char* string){

457

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

482

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

458

483

}

459

484

460

485

static int init_gnutls_global(const char *pubkeyfilename,

462

487

int ret;

463

488

464

489

if(debug){

465

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

490

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

491

"Initializing GnuTLS\n");

466

492

}

467

493

468

494

ret = gnutls_global_init();

469

495

if(ret != GNUTLS_E_SUCCESS){

470

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

471

safer_gnutls_strerror(ret));

496

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

497

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

472

498

return -1;

473

499

}

474

500

483

509

/* OpenPGP credentials */

484

510

ret = gnutls_certificate_allocate_credentials(&mc.cred);

485

511

if(ret != GNUTLS_E_SUCCESS){

486

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

487

safer_gnutls_strerror(ret));

512

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

513

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

488

514

gnutls_global_deinit();

489

515

return -1;

490

516

}

491

517

492

518

if(debug){

493

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

519

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

520

"Attempting to use OpenPGP public key %s and"

494

521

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

495

522

seckeyfilename);

496

523

}

500

527

GNUTLS_OPENPGP_FMT_BASE64);

501

528

if(ret != GNUTLS_E_SUCCESS){

502

529

fprintf(stderr,

530

"Mandos plugin mandos-client: "

503

531

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

504

532

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

505

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

506

safer_gnutls_strerror(ret));

533

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

534

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

507

535

goto globalfail;

508

536

}

509

537

510

538

/* GnuTLS server initialization */

511

539

ret = gnutls_dh_params_init(&mc.dh_params);

512

540

if(ret != GNUTLS_E_SUCCESS){

513

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

541

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

542

"Error in GnuTLS DH parameter initialization:"

514

543

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

515

544

goto globalfail;

516

545

}

517

546

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

518

547

if(ret != GNUTLS_E_SUCCESS){

519

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

548

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

549

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

520

550

safer_gnutls_strerror(ret));

521

551

goto globalfail;

522

552

}

543

573

}

544

574

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

545

575

if(ret != GNUTLS_E_SUCCESS){

546

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

576

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

577

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

547

578

safer_gnutls_strerror(ret));

548

579

}

549

580

557

588

}

558

589

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

559

590

if(ret != GNUTLS_E_SUCCESS){

560

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

561

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

562

safer_gnutls_strerror(ret));

591

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

592

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

593

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

594

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

563

595

gnutls_deinit(*session);

564

596

return -1;

565

597

}

574

606

}

575

607

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

576

608

if(ret != GNUTLS_E_SUCCESS){

577

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

609

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

610

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

578

611

safer_gnutls_strerror(ret));

579

612

gnutls_deinit(*session);

580

613

return -1;

626

659

pf = PF_INET;

627

660

break;

628

661

default:

629

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

662

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

663

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

630

664

errno = EINVAL;

631

665

return -1;

632

666

}

637

671

}

638

672

639

673

if(debug){

640

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

674

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

675

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

641

676

"\n", ip, port);

642

677

}

643

678

670

705

}

671

706

if(ret == 0){

672

707

int e = errno;

673

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

708

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

709

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

674

710

errno = e;

675

711

goto mandos_end;

676

712

}

683

719

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

684

720

-Wunreachable-code*/

685

721

if(if_index == AVAHI_IF_UNSPEC){

686

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

722

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

723

"An IPv6 link-local address is incomplete"

687

724

" without a network interface\n");

688

725

errno = EINVAL;

689

726

goto mandos_end;

708

745

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

709

746

perror_plus("if_indextoname");

710

747

} else {

711

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

748

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

749

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

712

750

ip, interface, port);

713

751

}

714

752

} else {

715

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

716

port);

753

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

754

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

717

755

}

718

756

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

719

757

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

729

767

perror_plus("inet_ntop");

730

768

} else {

731

769

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

732

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

770

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

771

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

733

772

}

734

773

}

735

774

}

789

828

}

790

829

791

830

if(debug){

792

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

831

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

832

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

793

833

}

794

834

795

835

if(quit_now){

815

855

816

856

if(ret != GNUTLS_E_SUCCESS){

817

857

if(debug){

818

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

858

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

859

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

819

860

gnutls_perror(ret);

820

861

}

821

862

errno = EPROTO;

825

866

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

826

867

827

868

if(debug){

828

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

829

ip);

869

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

870

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

830

871

}

831

872

832

873

while(true){

870

911

}

871

912

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

872

913

if(ret < 0){

873

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

914

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

915

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

874

916

gnutls_perror(ret);

875

917

errno = EPROTO;

876

918

goto mandos_end;

877

919

}

878

920

break;

879

921

default:

880

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

922

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

923

"Unknown error while reading data from"

881

924

" encrypted session with Mandos server\n");

882

925

gnutls_bye(session, GNUTLS_SHUT_RDWR);

883

926

errno = EIO;

889

932

}

890

933

891

934

if(debug){

892

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

935

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

936

"Closing TLS session\n");

893

937

}

894

938

895

939

if(quit_now){

925

969

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

926

970

int e = errno;

927

971

if(debug){

928

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

972

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

973

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

929

974

strerror(errno));

930

975

}

931

976

errno = e;

989

1034

switch(event){

990

1035

default:

991

1036

case AVAHI_RESOLVER_FAILURE:

992

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

1037

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

1038

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

993

1039

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

994

1040

avahi_strerror(avahi_server_errno(mc.server)));

995

1041

break;

999

1045

char ip[AVAHI_ADDRESS_STR_MAX];

1000

1046

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

1001

1047

if(debug){

1002

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

1048

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

1049

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

1003

1050

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

1004

1051

ip, (intmax_t)interface, port);

1005

1052

}

1039

1086

default:

1040

1087

case AVAHI_BROWSER_FAILURE:

1041

1088

1042

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

1089

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

1090

"(Avahi browser) %s\n",

1043

1091

avahi_strerror(avahi_server_errno(mc.server)));

1044

1092

avahi_simple_poll_quit(mc.simple_poll);

1045

1093

return;

1053

1101

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

1054

1102

name, type, domain, protocol, 0,

1055

1103

resolve_callback, NULL) == NULL)

1056

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

1104

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

1105

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

1057

1106

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

1058

1107

break;

1059

1108

1063

1112

case AVAHI_BROWSER_ALL_FOR_NOW:

1064

1113

case AVAHI_BROWSER_CACHE_EXHAUSTED:

1065

1114

if(debug){

1066

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

1115

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

1116

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

1067

1117

}

1068

1118

break;

1069

1119

}

1084

1134

errno = old_errno;

1085

1135

}

1086

1136

1087

/*

1088

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

1089

* corresponds to an acceptable network device.

1090

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

1091

*/

1092

int good_interface(const struct dirent *if_entry){

1093

ssize_t ssret;

1094

char *flagname = NULL;

1095

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

1096

return 0;

1097

}

1098

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

1099

if_entry->d_name);

1100

if(ret < 0){

1101

perror_plus("asprintf");

1102

return 0;

1103

}

1104

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

1105

if(flags_fd == -1){

1106

perror_plus("open");

1107

free(flagname);

1108

return 0;

1109

}

1110

free(flagname);

1111

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

1112

/* read line from flags_fd */

1113

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

1114

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

1115

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

1116

if(flagstring == NULL){

1117

perror_plus("malloc");

1118

close(flags_fd);

1119

return 0;

1120

}

1121

while(to_read > 0){

1122

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

1123

(size_t)to_read));

1124

if(ssret == -1){

1125

perror_plus("read");

1126

free(flagstring);

1127

close(flags_fd);

1128

return 0;

1129

}

1130

to_read -= ssret;

1131

if(ssret == 0){

1132

break;

1133

}

1134

}

1135

close(flags_fd);

1136

intmax_t tmpmax;

1137

char *tmp;

1138

errno = 0;

1139

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

1140

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

1141

and not (isspace(*tmp)))

1142

or tmpmax != (ifreq_flags)tmpmax){

1137

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

1138

int ret;

1139

1140

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

1141

if(s < 0){

1142

perror_plus("socket");

1143

return false;

1144

}

1145

strcpy(ifr->ifr_name, ifname);

1146

ret = ioctl(s, SIOCGIFFLAGS, ifr);

1147

if(ret == -1){

1143

1148

if(debug){

1144

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

1145

flagstring, if_entry->d_name);

1149

perror_plus("ioctl SIOCGIFFLAGS");

1146

1150

}

1147

free(flagstring);

1148

return 0;

1151

return false;

1149

1152

}

1150

free(flagstring);

1151

ifreq_flags flags = (ifreq_flags)tmpmax;

1153

return true;

1154

}

1155

1156

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

1157

1152

1158

/* Reject the loopback device */

1153

if(flags & IFF_LOOPBACK){

1159

if(ifr->ifr_flags & IFF_LOOPBACK){

1154

1160

if(debug){

1155

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

1156

if_entry->d_name);

1161

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

1162

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

1157

1163

}

1158

return 0;

1164

return false;

1159

1165

}

1160

1166

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

1161

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

1167

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

1162

1168

if(debug){

1163

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

1164

if_entry->d_name);

1169

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

1170

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

1165

1171

}

1166

return 1;

1172

return true;

1167

1173

}

1168

1174

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

1169

if(not (flags & IFF_BROADCAST)){

1175

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

1170

1176

if(debug){

1171

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

1172

if_entry->d_name);

1177

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

1178

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

1173

1179

}

1174

return 0;

1180

return false;

1175

1181

}

1176

1182

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

1177

if(flags & IFF_NOARP){

1183

if(ifr->ifr_flags & IFF_NOARP){

1178

1184

if(debug){

1179

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

1180

if_entry->d_name);

1185

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

1186

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

1181

1187

}

1182

return 0;

1188

return false;

1183

1189

}

1190

1184

1191

/* Accept this device */

1185

1192

if(debug){

1186

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

1187

if_entry->d_name);

1193

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

1194

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

1195

}

1196

return true;

1197

}

1198

1199

/*

1200

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

1201

* corresponds to an acceptable network device.

1202

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

1203

*/

1204

int good_interface(const struct dirent *if_entry){

1205

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

1206

return 0;

1207

}

1208

1209

struct ifreq ifr;

1210

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

1211

if(debug){

1212

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

1213

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

1214

if_entry->d_name);

1215

}

1216

return 0;

1217

}

1218

1219

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

1220

return 0;

1221

}

1222

return 1;

1223

}

1224

1225

/*

1226

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

1227

* corresponds to an acceptable network device which is up.

1228

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

1229

*/

1230

int up_interface(const struct dirent *if_entry){

1231

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

1232

return 0;

1233

}

1234

1235

struct ifreq ifr;

1236

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

1237

if(debug){

1238

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

1239

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

1240

if_entry->d_name);

1241

}

1242

return 0;

1243

}

1244

1245

/* Reject down interfaces */

1246

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

1247

if(debug){

1248

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

1249

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

1250

if_entry->d_name);

1251

}

1252

return 0;

1253

}

1254

1255

/* Reject non-running interfaces */

1256

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

1257

if(debug){

1258

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

1259

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

1260

if_entry->d_name);

1261

}

1262

return 0;

1263

}

1264

1265

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

1266

return 0;

1188

1267

}

1189

1268

return 1;

1190

1269

}

1200

1279

return 1;

1201

1280

}

1202

1281

1282

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

1283

int runnable_hook(const struct dirent *direntry){

1284

int ret;

1285

struct stat st;

1286

1287

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

1288

/* Empty name? */

1289

return 0;

1290

}

1291

1292

/* Save pointer to last character */

1293

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

1294

1295

if(*end == '~'){

1296

/* Backup name~ */

1297

return 0;

1298

}

1299

1300

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

1301

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

1302

/* Temporary #name# */

1303

return 0;

1304

}

1305

1306

/* XXX more rules here */

1307

1308

char *fullname = NULL;

1309

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

1310

direntry->d_name);

1311

if(ret < 0){

1312

perror_plus("asprintf");

1313

return 0;

1314

}

1315

1316

ret = stat(fullname, &st);

1317

if(ret == -1){

1318

if(debug){

1319

perror_plus("Could not stat plugin");

1320

}

1321

return 0;

1322

}

1323

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

1324

/* Not a regular file */

1325

return 0;

1326

}

1327

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

1328

/* Not executable */

1329

return 0;

1330

}

1331

return 1;

1332

}

1333

1203

1334

int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){

1204

1335

int ret;

1205

1336

struct timespec now;

1206

1337

struct timespec waited_time;

1207

1338

intmax_t block_time;

1208

1339

1209

1340

while(true){

1210

1341

if(mc.current_server == NULL){

1211

1342

if (debug){

1212

fprintf(stderr,

1343

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

1213

1344

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

1214

1345

}

1215

1346

ret = avahi_simple_poll_iterate(s, -1);

1216

1347

} else {

1217

1348

if (debug){

1218

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

1349

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

1350

"Check current_server if we should run it,"

1219

1351

" or wait\n");

1220

1352

}

1221

1353

/* the current time */

1236

1368

block_time = ((retry_interval

1237

1369

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

1238

1370

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

1239

1371

1240

1372

if (debug){

1241

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

1373

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

1374

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

1242

1375

}

1243

1376

1244

1377

if(block_time <= 0){

1245

1378

ret = start_mandos_communication(mc.current_server->ip,

1246

1379

mc.current_server->port,

1264

1397

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

1265

1398

}

1266

1399

if(ret != 0){

1267

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

1400

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

1268

1401

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

1269

1402

}

1270

1403

}

1358

1491

.arg = "SECONDS",

1359

1492

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

1360

1493

.group = 2 },

1494

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

1495

.arg = "DIR",

1496

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

1497

.group = 2 },

1361

1498

/*

1362

1499

* These reproduce what we would get without ARGP_NO_HELP

1363

1500

*/

1411

1548

errno = 0;

1412

1549

retry_interval = strtod(arg, &tmp);

1413

1550

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

1414

or (retry_interval * 1000) > INT_MAX){

1551

or (retry_interval * 1000) > INT_MAX

1552

or retry_interval < 0){

1415

1553

argp_error(state, "Bad retry interval");

1416

1554

}

1417

1555

break;

1556

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

1557

hookdir = arg;

1558

break;

1418

1559

/*

1419

1560

* These reproduce what we would get without ARGP_NO_HELP

1420

1561

*/

1426

1567

argp_state_help(state, state->out_stream,

1427

1568

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1428

1569

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

1570

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

1429

1571

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

1430

1572

exit(argp_err_exit_status);

1431

1573

break;

1468

1610

perror_plus("seteuid");

1469

1611

}

1470

1612

1471

int seckey_fd = open(PATHDIR "/" SECKEY, O_RDONLY);

1472

if(seckey_fd == -1){

1473

perror_plus("open");

1474

} else {

1475

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

1476

if(ret == -1){

1477

perror_plus("fstat");

1613

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

1614

int seckey_fd = open(seckey, O_RDONLY);

1615

if(seckey_fd == -1){

1616

perror_plus("open");

1478

1617

} else {

1479

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

1480

ret = fchown(seckey_fd, uid, gid);

1481

if(ret == -1){

1482

perror_plus("fchown");

1618

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

1619

if(ret == -1){

1620

perror_plus("fstat");

1621

} else {

1622

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

1623

ret = fchown(seckey_fd, uid, gid);

1624

if(ret == -1){

1625

perror_plus("fchown");

1626

}

1483

1627

}

1484

1628

}

1629

TEMP_FAILURE_RETRY(close(seckey_fd));

1485

1630

}

1486

TEMP_FAILURE_RETRY(close(seckey_fd));

1487

1631

}

1488

1632

1489

int pubkey_fd = open(PATHDIR "/" PUBKEY, O_RDONLY);

1490

if(pubkey_fd == -1){

1491

perror_plus("open");

1492

} else {

1493

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

1494

if(ret == -1){

1495

perror_plus("fstat");

1633

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

1634

int pubkey_fd = open(pubkey, O_RDONLY);

1635

if(pubkey_fd == -1){

1636

perror_plus("open");

1496

1637

} else {

1497

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

1498

ret = fchown(pubkey_fd, uid, gid);

1499

if(ret == -1){

1500

perror_plus("fchown");

1638

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

1639

if(ret == -1){

1640

perror_plus("fstat");

1641

} else {

1642

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

1643

ret = fchown(pubkey_fd, uid, gid);

1644

if(ret == -1){

1645

perror_plus("fchown");

1646

}

1501

1647

}

1502

1648

}

1649

TEMP_FAILURE_RETRY(close(pubkey_fd));

1503

1650

}

1504

TEMP_FAILURE_RETRY(close(pubkey_fd));

1505

1651

}

1506

1652

1507

1653

/* Lower privileges */

1512

1658

}

1513

1659

}

1514

1660

1661

/* Find network hooks and run them */

1662

{

1663

struct dirent **direntries;

1664

struct dirent *direntry;

1665

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

1666

alphasort);

1667

if(numhooks == -1){

1668

perror_plus("scandir");

1669

} else {

1670

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

1671

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

1672

direntry = direntries[0];

1673

char *fullname = NULL;

1674

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

1675

if(ret < 0){

1676

perror_plus("asprintf");

1677

continue;

1678

}

1679

pid_t hook_pid = fork();

1680

if(hook_pid == 0){

1681

/* Child */

1682

dup2(devnull, STDIN_FILENO);

1683

close(devnull);

1684

dup2(STDERR_FILENO, STDOUT_FILENO);

1685

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

1686

if(ret == -1){

1687

perror_plus("setenv");

1688

exit(1);

1689

}

1690

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

1691

if(ret == -1){

1692

perror_plus("setenv");

1693

exit(1);

1694

}

1695

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

1696

if(ret == -1){

1697

perror_plus("setenv");

1698

exit(1);

1699

}

1700

char *delaystring;

1701

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

1702

if(ret == -1){

1703

perror_plus("asprintf");

1704

exit(1);

1705

}

1706

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

1707

if(ret == -1){

1708

free(delaystring);

1709

perror_plus("setenv");

1710

exit(1);

1711

}

1712

free(delaystring);

1713

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

1714

perror_plus("execl");

1715

} else {

1716

int status;

1717

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

1718

perror_plus("waitpid");

1719

free(fullname);

1720

continue;

1721

}

1722

if(WIFEXITED(status)){

1723

if(WEXITSTATUS(status) != 0){

1724

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

1725

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

1726

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

1727

WEXITSTATUS(status));

1728

free(fullname);

1729

continue;

1730

}

1731

} else if(WIFSIGNALED(status)){

1732

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

1733

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

1734

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

1735

WTERMSIG(status));

1736

free(fullname);

1737

continue;

1738

} else {

1739

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

1740

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

1741

direntry->d_name);

1742

free(fullname);

1743

continue;

1744

}

1745

}

1746

free(fullname);

1747

if(quit_now){

1748

goto end;

1749

}

1750

}

1751

close(devnull);

1752

}

1753

}

1754

1515

1755

if(not debug){

1516

1756

avahi_set_log_function(empty_log);

1517

1757

}

1518

1758

1519

1759

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

1520

1760

struct dirent **direntries;

1521

ret = scandir(sys_class_net, &direntries, good_interface,

1761

/* First look for interfaces that are up */

1762

ret = scandir(sys_class_net, &direntries, up_interface,

1522

1763

alphasort);

1764

if(ret == 0){

1765

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

1766

free(direntries);

1767

ret = scandir(sys_class_net, &direntries, good_interface,

1768

alphasort);

1769

}

1523

1770

if(ret >= 1){

1524

/* Pick the first good interface */

1771

/* Pick the first interface returned */

1525

1772

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

1526

1773

if(debug){

1527

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

1774

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

1775

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

1528

1776

}

1529

1777

if(interface == NULL){

1530

1778

perror_plus("malloc");

1535

1783

free(direntries);

1536

1784

} else {

1537

1785

free(direntries);

1538

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

1786

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

1787

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

1539

1788

exitcode = EXIT_FAILURE;

1540

1789

goto end;

1541

1790

}

1547

1796

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

1548

1797

mc.simple_poll = avahi_simple_poll_new();

1549

1798

if(mc.simple_poll == NULL){

1550

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

1799

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

1800

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

1551

1801

exitcode = EX_UNAVAILABLE;

1552

1802

goto end;

1553

1803

}

1619

1869

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

1620

1870

if_index = (AvahiIfIndex) if_nametoindex(interface);

1621

1871

if(if_index == 0){

1622

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

1872

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

1873

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

1623

1874

exitcode = EX_UNAVAILABLE;

1624

1875

goto end;

1625

1876

}

1766

2017

1767

2018

ret = init_gnutls_global(pubkey, seckey);

1768

2019

if(ret == -1){

1769

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

2020

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

2021

"init_gnutls_global failed\n");

1770

2022

exitcode = EX_UNAVAILABLE;

1771

2023

goto end;

1772

2024

} else {

1788

2040

}

1789

2041

1790

2042

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

1791

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

2043

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

2044

"init_gpgme failed\n");

1792

2045

exitcode = EX_UNAVAILABLE;

1793

2046

goto end;

1794

2047

} else {

1804

2057

/* (Mainly meant for debugging) */

1805

2058

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

1806

2059

if(address == NULL){

1807

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

2060

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

2061

"No colon in address\n");

1808

2062

exitcode = EX_USAGE;

1809

2063

goto end;

1810

2064

}

1818

2072

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

1819

2073

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

1820

2074

or tmpmax != (uint16_t)tmpmax){

1821

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

2075

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

2076

"Bad port number\n");

1822

2077

exitcode = EX_USAGE;

1823

2078

goto end;

1824

2079

}

1829

2084

1830

2085

port = (uint16_t)tmpmax;

1831

2086

*address = '\0';

1832

address = connect_to;

1833

2087

/* Colon in address indicates IPv6 */

1834

2088

int af;

1835

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

2089

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

1836

2090

af = AF_INET6;

2091

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

2092

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

2093

{

2094

connect_to++;

2095

address[-1] = '\0';

2096

}

1837

2097

} else {

1838

2098

af = AF_INET;

1839

2099

}

2100

address = connect_to;

1840

2101

1841

2102

if(quit_now){

1842

2103

goto end;

1843

2104

}

1844

2105

1845

2106

while(not quit_now){

1846

2107

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

1847

2108

if(quit_now or ret == 0){

1848

2109

break;

1849

2110

}

1850

sleep((int)retry_interval or 1);

1851

};

1852

2111

if(debug){

2112

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

2113

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

2114

}

2115

sleep((int)retry_interval);

2116

}

2117

1853

2118

if (not quit_now){

1854

2119

exitcode = EXIT_SUCCESS;

1855

2120

}

1856

2121

1857

2122

goto end;

1858

2123

}

1859

2124

1881

2146

1882

2147

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

1883

2148

if(mc.server == NULL){

1884

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

2149

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

2150

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

1885

2151

avahi_strerror(error));

1886

2152

exitcode = EX_UNAVAILABLE;

1887

2153

goto end;

1896

2162

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

1897

2163

NULL, 0, browse_callback, NULL);

1898

2164

if(sb == NULL){

1899

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

2165

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

2166

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

1900

2167

avahi_strerror(avahi_server_errno(mc.server)));

1901

2168

exitcode = EX_UNAVAILABLE;

1902

2169

goto end;

1909

2176

/* Run the main loop */

1910

2177

1911

2178

if(debug){

1912

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

2179

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

2180

"Starting Avahi loop search\n");

1913

2181

}

1914

2182

1915

2183

ret = avahi_loop_with_timeout(mc.simple_poll,

1916

2184

(int)(retry_interval * 1000));

1917

2185

if(debug){

1918

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

2186

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

2187

"avahi_loop_with_timeout exited %s\n",

1919

2188

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

1920

2189

}

1921

2190

1922

2191

end:

1923

2192

1924

2193

if(debug){

1925

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

2194

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

2195

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

1926

2196

}

1927

2197

1928

2198

/* Cleanup things */

1956

2226

}

1957

2227

}

1958

2228

2229

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

2230

1959

2231

/* Take down the network interface */

1960

2232

if(take_down_interface){

1961

2233

/* Re-raise priviliges */

1968

2240

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

1969

2241

if(ret == -1){

1970

2242

perror_plus("ioctl SIOCGIFFLAGS");

1971

} else if(network.ifr_flags & IFF_UP) {

2243

} else if(network.ifr_flags & IFF_UP){

1972

2244

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

1973

2245

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

1974

2246

if(ret == -1){

1992

2264

if(tempdir_created){

1993

2265

struct dirent **direntries = NULL;

1994

2266

struct dirent *direntry = NULL;

1995

ret = scandir(tempdir, &direntries, notdotentries, alphasort);

1996

if (ret > 0){

1997

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

2267

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

2268

alphasort);

2269

if (numentries > 0){

2270

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

1998

2271

direntry = direntries[i];

1999

2272

char *fullname = NULL;

2000

2273

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

2005

2278

}

2006

2279

ret = remove(fullname);

2007

2280

if(ret == -1){

2008

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

2009

strerror(errno));

2281

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

2282

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

2010

2283

}

2011

2284

free(fullname);

2012

2285

}

2013

2286

}

2014

2287

2015

/* need to be cleaned even if ret == 0 because man page doesn't

2016

specify */

2288

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

2017

2289

free(direntries);

2018

if (ret == -1){

2290

if (numentries == -1){

2019

2291

perror_plus("scandir");

2020

2292

}

2021

2293

ret = rmdir(tempdir);