/mandos/release : revision 237.16.7

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

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

179

va_list ap;

180

va_start (ap, format);

181

182

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

183

program_invocation_short_name));

184

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

185

}

186

187

177

/*

188

178

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

189

179

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

263

253

264

254

rc = gpgme_data_new_from_fd(&pgp_data, fd);

265

255

if(rc != GPG_ERR_NO_ERROR){

266

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

267

gpgme_strsource(rc), gpgme_strerror(rc));

256

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

257

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

258

gpgme_strsource(rc), gpgme_strerror(rc));

268

259

return false;

269

260

}

270

261

271

262

rc = gpgme_op_import(mc.ctx, pgp_data);

272

263

if(rc != GPG_ERR_NO_ERROR){

273

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

274

gpgme_strsource(rc), gpgme_strerror(rc));

264

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

265

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

266

gpgme_strsource(rc), gpgme_strerror(rc));

275

267

return false;

276

268

}

277

269

284

276

}

285

277

286

278

if(debug){

287

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

279

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

280

"Initializing GPGME\n");

288

281

}

289

282

290

283

/* Init GPGME */

291

284

gpgme_check_version(NULL);

292

285

rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

293

286

if(rc != GPG_ERR_NO_ERROR){

294

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

295

gpgme_strsource(rc), gpgme_strerror(rc));

287

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

288

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

289

gpgme_strsource(rc), gpgme_strerror(rc));

296

290

return false;

297

291

}

298

292

299

293

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

300

294

rc = gpgme_get_engine_info(&engine_info);

301

295

if(rc != GPG_ERR_NO_ERROR){

302

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

303

gpgme_strsource(rc), gpgme_strerror(rc));

296

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

297

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

298

gpgme_strsource(rc), gpgme_strerror(rc));

304

299

return false;

305

300

}

306

301

while(engine_info != NULL){

312

307

engine_info = engine_info->next;

313

308

}

314

309

if(engine_info == NULL){

315

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

316

tempdir);

310

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

311

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

317

312

return false;

318

313

}

319

314

320

315

/* Create new GPGME "context" */

321

316

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

322

317

if(rc != GPG_ERR_NO_ERROR){

323

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

324

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

325

gpgme_strerror(rc));

318

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

319

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

320

gpgme_strerror(rc));

326

321

return false;

327

322

}

328

323

347

342

ssize_t plaintext_length = 0;

348

343

349

344

if(debug){

350

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

345

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

346

"Trying to decrypt OpenPGP data\n");

351

347

}

352

348

353

349

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

354

350

rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,

355

351

0);

356

352

if(rc != GPG_ERR_NO_ERROR){

357

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

358

gpgme_strsource(rc), gpgme_strerror(rc));

353

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

354

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

355

gpgme_strsource(rc), gpgme_strerror(rc));

359

356

return -1;

360

357

}

361

358

362

359

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

363

360

rc = gpgme_data_new(&dh_plain);

364

361

if(rc != GPG_ERR_NO_ERROR){

365

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

366

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

367

gpgme_strsource(rc), gpgme_strerror(rc));

362

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

363

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

364

gpgme_strsource(rc), gpgme_strerror(rc));

368

365

gpgme_data_release(dh_crypto);

369

366

return -1;

370

367

}

373

370

data buffer */

374

371

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

375

372

if(rc != GPG_ERR_NO_ERROR){

376

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

377

gpgme_strsource(rc), gpgme_strerror(rc));

373

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

374

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

375

gpgme_strsource(rc), gpgme_strerror(rc));

378

376

plaintext_length = -1;

379

377

if(debug){

380

378

gpgme_decrypt_result_t result;

381

379

result = gpgme_op_decrypt_result(mc.ctx);

382

380

if(result == NULL){

383

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

381

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

382

"gpgme_op_decrypt_result failed\n");

384

383

} else {

385

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

386

result->unsupported_algorithm);

387

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

388

result->wrong_key_usage);

384

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

385

"Unsupported algorithm: %s\n",

386

result->unsupported_algorithm);

387

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

388

"Wrong key usage: %u\n",

389

result->wrong_key_usage);

389

390

if(result->file_name != NULL){

390

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

391

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

392

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

391

393

}

392

394

gpgme_recipient_t recipient;

393

395

recipient = result->recipients;

394

396

while(recipient != NULL){

395

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

396

gpgme_pubkey_algo_name

397

(recipient->pubkey_algo));

398

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

399

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

400

recipient->status == GPG_ERR_NO_SECKEY

401

? "No" : "Yes");

397

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

398

"Public key algorithm: %s\n",

399

gpgme_pubkey_algo_name(recipient->pubkey_algo));

400

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

401

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

402

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

403

"Secret key available: %s\n",

404

recipient->status == GPG_ERR_NO_SECKEY

405

? "No" : "Yes");

402

406

recipient = recipient->next;

403

407

}

404

408

}

407

411

}

408

412

409

413

if(debug){

410

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

414

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

415

"Decryption of OpenPGP data succeeded\n");

411

416

}

412

417

413

418

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

444

449

}

445

450

446

451

if(debug){

447

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

452

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

453

"Decrypted password is: ");

448

454

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

449

455

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

450

456

}

472

478

/* GnuTLS log function callback */

473

479

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

474

480

const char* string){

475

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

481

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

476

482

}

477

483

478

484

static int init_gnutls_global(const char *pubkeyfilename,

480

486

int ret;

481

487

482

488

if(debug){

483

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

489

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

490

"Initializing GnuTLS\n");

484

491

}

485

492

486

493

ret = gnutls_global_init();

487

494

if(ret != GNUTLS_E_SUCCESS){

488

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

489

safer_gnutls_strerror(ret));

495

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

496

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

490

497

return -1;

491

498

}

492

499

501

508

/* OpenPGP credentials */

502

509

ret = gnutls_certificate_allocate_credentials(&mc.cred);

503

510

if(ret != GNUTLS_E_SUCCESS){

504

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

505

safer_gnutls_strerror(ret));

511

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

512

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

506

513

gnutls_global_deinit();

507

514

return -1;

508

515

}

509

516

510

517

if(debug){

511

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

512

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

513

pubkeyfilename,

514

seckeyfilename);

518

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

519

"Attempting to use OpenPGP public key %s and"

520

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

521

seckeyfilename);

515

522

}

516

523

517

524

ret = gnutls_certificate_set_openpgp_key_file

518

525

(mc.cred, pubkeyfilename, seckeyfilename,

519

526

GNUTLS_OPENPGP_FMT_BASE64);

520

527

if(ret != GNUTLS_E_SUCCESS){

521

fprintf_plus(stderr,

522

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

523

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

524

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

525

safer_gnutls_strerror(ret));

528

fprintf(stderr,

529

"Mandos plugin mandos-client: "

530

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

531

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

532

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

533

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

526

534

goto globalfail;

527

535

}

528

536

529

537

/* GnuTLS server initialization */

530

538

ret = gnutls_dh_params_init(&mc.dh_params);

531

539

if(ret != GNUTLS_E_SUCCESS){

532

fprintf_plus(stderr, "Error in GnuTLS DH parameter"

533

" initialization: %s\n",

534

safer_gnutls_strerror(ret));

540

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

541

"Error in GnuTLS DH parameter initialization:"

542

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

535

543

goto globalfail;

536

544

}

537

545

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

538

546

if(ret != GNUTLS_E_SUCCESS){

539

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

540

safer_gnutls_strerror(ret));

547

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

548

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

549

safer_gnutls_strerror(ret));

541

550

goto globalfail;

542

551

}

543

552

563

572

}

564

573

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

565

574

if(ret != GNUTLS_E_SUCCESS){

566

fprintf_plus(stderr,

567

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

568

safer_gnutls_strerror(ret));

575

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

576

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

577

safer_gnutls_strerror(ret));

569

578

}

570

579

571

580

{

578

587

}

579

588

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

580

589

if(ret != GNUTLS_E_SUCCESS){

581

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

582

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

583

safer_gnutls_strerror(ret));

590

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

591

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

592

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

593

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

584

594

gnutls_deinit(*session);

585

595

return -1;

586

596

}

595

605

}

596

606

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

597

607

if(ret != GNUTLS_E_SUCCESS){

598

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

599

safer_gnutls_strerror(ret));

608

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

609

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

610

safer_gnutls_strerror(ret));

600

611

gnutls_deinit(*session);

601

612

return -1;

602

613

}

647

658

pf = PF_INET;

648

659

break;

649

660

default:

650

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

661

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

662

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

651

663

errno = EINVAL;

652

664

return -1;

653

665

}

658

670

}

659

671

660

672

if(debug){

661

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

662

PRIu16 "\n", ip, port);

673

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

674

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

675

"\n", ip, port);

663

676

}

664

677

665

678

tcp_sd = socket(pf, SOCK_STREAM, 0);

691

704

}

692

705

if(ret == 0){

693

706

int e = errno;

694

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

707

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

708

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

695

709

errno = e;

696

710

goto mandos_end;

697

711

}

704

718

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

705

719

-Wunreachable-code*/

706

720

if(if_index == AVAHI_IF_UNSPEC){

707

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

708

" incomplete without a network interface\n");

721

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

722

"An IPv6 link-local address is incomplete"

723

" without a network interface\n");

709

724

errno = EINVAL;

710

725

goto mandos_end;

711

726

}

729

744

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

730

745

perror_plus("if_indextoname");

731

746

} else {

732

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

733

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

747

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

748

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

749

ip, interface, port);

734

750

}

735

751

} else {

736

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

737

ip, port);

752

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

753

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

738

754

}

739

755

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

740

756

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

750

766

perror_plus("inet_ntop");

751

767

} else {

752

768

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

753

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

769

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

770

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

754

771

}

755

772

}

756

773

}

810

827

}

811

828

812

829

if(debug){

813

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

830

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

831

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

814

832

}

815

833

816

834

if(quit_now){

836

854

837

855

if(ret != GNUTLS_E_SUCCESS){

838

856

if(debug){

839

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

857

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

858

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

840

859

gnutls_perror(ret);

841

860

}

842

861

errno = EPROTO;

846

865

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

847

866

848

867

if(debug){

849

fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"

850

" %s\n", ip);

868

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

869

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

851

870

}

852

871

853

872

while(true){

891

910

}

892

911

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

893

912

if(ret < 0){

894

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

895

"***\n");

913

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

914

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

896

915

gnutls_perror(ret);

897

916

errno = EPROTO;

898

917

goto mandos_end;

899

918

}

900

919

break;

901

920

default:

902

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

903

" encrypted session with Mandos server\n");

921

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

922

"Unknown error while reading data from"

923

" encrypted session with Mandos server\n");

904

924

gnutls_bye(session, GNUTLS_SHUT_RDWR);

905

925

errno = EIO;

906

926

goto mandos_end;

911

931

}

912

932

913

933

if(debug){

914

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

934

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

935

"Closing TLS session\n");

915

936

}

916

937

917

938

if(quit_now){

946

967

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

947

968

int e = errno;

948

969

if(debug){

949

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

950

strerror(errno));

970

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

971

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

972

strerror(errno));

951

973

}

952

974

errno = e;

953

975

goto mandos_end;

1010

1032

switch(event){

1011

1033

default:

1012

1034

case AVAHI_RESOLVER_FAILURE:

1013

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

1014

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

1015

domain,

1016

avahi_strerror(avahi_server_errno(mc.server)));

1035

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

1036

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

1037

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

1038

avahi_strerror(avahi_server_errno(mc.server)));

1017

1039

break;

1018

1040

1019

1041

case AVAHI_RESOLVER_FOUND:

1021

1043

char ip[AVAHI_ADDRESS_STR_MAX];

1022

1044

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

1023

1045

if(debug){

1024

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

1025

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

1026

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

1046

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

1047

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

1048

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

1049

ip, (intmax_t)interface, port);

1027

1050

}

1028

1051

int ret = start_mandos_communication(ip, port, interface,

1029

1052

avahi_proto_to_af(proto));

1061

1084

default:

1062

1085

case AVAHI_BROWSER_FAILURE:

1063

1086

1064

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

1065

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)));

1066

1090

avahi_simple_poll_quit(mc.simple_poll);

1067

1091

return;

1068

1092

1075

1099

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

1076

1100

name, type, domain, protocol, 0,

1077

1101

resolve_callback, NULL) == NULL)

1078

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

1079

" %s\n", name,

1080

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)));

1081

1105

break;

1082

1106

1083

1107

case AVAHI_BROWSER_REMOVE:

1086

1110

case AVAHI_BROWSER_ALL_FOR_NOW:

1087

1111

case AVAHI_BROWSER_CACHE_EXHAUSTED:

1088

1112

if(debug){

1089

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

1090

" searching...\n");

1113

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

1114

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

1091

1115

}

1092

1116

break;

1093

1117

}

1132

1156

/* Reject the loopback device */

1133

1157

if(ifr->ifr_flags & IFF_LOOPBACK){

1134

1158

if(debug){

1135

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

1136

ifname);

1159

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

1160

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

1137

1161

}

1138

1162

return false;

1139

1163

}

1140

1164

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

1141

1165

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

1142

1166

if(debug){

1143

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

1144

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

1167

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

1168

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

1145

1169

}

1146

1170

return true;

1147

1171

}

1148

1172

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

1149

1173

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

1150

1174

if(debug){

1151

fprintf_plus(stderr, "Rejecting non-broadcast interface"

1152

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

1175

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

1176

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

1153

1177

}

1154

1178

return false;

1155

1179

}

1156

1180

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

1157

1181

if(ifr->ifr_flags & IFF_NOARP){

1158

1182

if(debug){

1159

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

1160

ifname);

1183

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

1184

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

1161

1185

}

1162

1186

return false;

1163

1187

}

1164

1188

1165

1189

/* Accept this device */

1166

1190

if(debug){

1167

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

1191

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

1192

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

1168

1193

}

1169

1194

return true;

1170

1195

}

1182

1207

struct ifreq ifr;

1183

1208

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

1184

1209

if(debug){

1185

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

1186

"\"%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);

1187

1213

}

1188

1214

return 0;

1189

1215

}

1207

1233

struct ifreq ifr;

1208

1234

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

1209

1235

if(debug){

1210

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

1211

"\"%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);

1212

1239

}

1213

1240

return 0;

1214

1241

}

1216

1243

/* Reject down interfaces */

1217

1244

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

1218

1245

if(debug){

1219

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

1220

if_entry->d_name);

1246

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

1247

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

1248

if_entry->d_name);

1221

1249

}

1222

1250

return 0;

1223

1251

}

1225

1253

/* Reject non-running interfaces */

1226

1254

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

1227

1255

if(debug){

1228

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

1229

if_entry->d_name);

1256

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

1257

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

1258

if_entry->d_name);

1230

1259

}

1231

1260

return 0;

1232

1261

}

1266

1295

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

1267

1296

/* Contains non-allowed characters */

1268

1297

if(debug){

1269

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

1270

direntry->d_name);

1298

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

1299

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

1300

direntry->d_name);

1271

1301

}

1272

1302

return 0;

1273

1303

}

1289

1319

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

1290

1320

/* Not a regular file */

1291

1321

if(debug){

1292

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

1293

direntry->d_name);

1322

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

1323

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

1324

direntry->d_name);

1294

1325

}

1295

1326

return 0;

1296

1327

}

1297

1328

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

1298

1329

/* Not executable */

1299

1330

if(debug){

1300

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

1301

direntry->d_name);

1331

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

1332

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

1333

direntry->d_name);

1302

1334

}

1303

1335

return 0;

1304

1336

}

1305

if(debug){

1306

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

1307

direntry->d_name);

1308

}

1309

1337

return 1;

1310

1338

}

1311

1339

1318

1346

while(true){

1319

1347

if(mc.current_server == NULL){

1320

1348

if (debug){

1321

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

1322

" No timeout!\n");

1349

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

1350

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

1323

1351

}

1324

1352

ret = avahi_simple_poll_iterate(s, -1);

1325

1353

} else {

1326

1354

if (debug){

1327

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

1328

" it, or wait\n");

1355

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

1356

"Check current_server if we should run it,"

1357

" or wait\n");

1329

1358

}

1330

1359

/* the current time */

1331

1360

ret = clock_gettime(CLOCK_MONOTONIC, &now);

1347

1376

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

1348

1377

1349

1378

if (debug){

1350

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

1351

block_time);

1379

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

1380

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

1352

1381

}

1353

1382

1354

1383

if(block_time <= 0){

1381

1410

}

1382

1411

}

1383

1412

1384

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

1385

const float delay){

1386

struct dirent **direntries;

1387

struct dirent *direntry;

1388

int ret;

1389

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

1390

alphasort);

1391

if(numhooks == -1){

1392

perror_plus("scandir");

1393

} else {

1394

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

1395

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

1396

direntry = direntries[i];

1397

char *fullname = NULL;

1398

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

1399

if(ret < 0){

1400

perror_plus("asprintf");

1401

continue;

1402

}

1403

if(debug){

1404

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

1405

direntry->d_name);

1406

}

1407

pid_t hook_pid = fork();

1408

if(hook_pid == 0){

1409

/* Child */

1410

/* Raise privileges */

1411

errno = 0;

1412

ret = seteuid(0);

1413

if(ret == -1){

1414

perror_plus("seteuid");

1415

}

1416

/* Raise privileges even more */

1417

errno = 0;

1418

ret = setuid(0);

1419

if(ret == -1){

1420

perror_plus("setuid");

1421

}

1422

/* Set group */

1423

errno = 0;

1424

ret = setgid(0);

1425

if(ret == -1){

1426

perror_plus("setgid");

1427

}

1428

/* Reset supplementary groups */

1429

errno = 0;

1430

ret = setgroups(0, NULL);

1431

if(ret == -1){

1432

perror_plus("setgroups");

1433

}

1434

dup2(devnull, STDIN_FILENO);

1435

close(devnull);

1436

dup2(STDERR_FILENO, STDOUT_FILENO);

1437

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

1438

if(ret == -1){

1439

perror_plus("setenv");

1440

_exit(EX_OSERR);

1441

}

1442

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

1443

if(ret == -1){

1444

perror_plus("setenv");

1445

_exit(EX_OSERR);

1446

}

1447

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

1448

if(ret == -1){

1449

perror_plus("setenv");

1450

_exit(EX_OSERR);

1451

}

1452

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

1453

if(ret == -1){

1454

perror_plus("setenv");

1455

_exit(EX_OSERR);

1456

}

1457

char *delaystring;

1458

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

1459

if(ret == -1){

1460

perror_plus("asprintf");

1461

_exit(EX_OSERR);

1462

}

1463

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

1464

if(ret == -1){

1465

free(delaystring);

1466

perror_plus("setenv");

1467

_exit(EX_OSERR);

1468

}

1469

free(delaystring);

1470

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

1471

perror_plus("execl");

1472

} else {

1473

int status;

1474

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

1475

perror_plus("waitpid");

1476

free(fullname);

1477

continue;

1478

}

1479

if(WIFEXITED(status)){

1480

if(WEXITSTATUS(status) != 0){

1481

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

1482

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

1483

WEXITSTATUS(status));

1484

free(fullname);

1485

continue;

1486

}

1487

} else if(WIFSIGNALED(status)){

1488

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

1489

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

1490

WTERMSIG(status));

1491

free(fullname);

1492

continue;

1493

} else {

1494

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

1495

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

1496

free(fullname);

1497

continue;

1498

}

1499

}

1500

free(fullname);

1501

if(debug){

1502

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

1503

direntry->d_name);

1504

}

1505

}

1506

close(devnull);

1507

}

1508

return true;

1509

}

1510

1511

1413

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

1512

1414

AvahiSServiceBrowser *sb = NULL;

1513

1415

int error;

1671

1573

argp_state_help(state, state->out_stream,

1672

1574

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1673

1575

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

1674

fprintf_plus(state->out_stream,

1675

"Mandos plugin mandos-client: ");

1676

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);

1677

1578

exit(argp_err_exit_status);

1678

1579

break;

1679

1580

default:

1706

1607

{

1707

1608

/* Work around Debian bug #633582:

1708

1609

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

1610

struct stat st;

1709

1611

1710

1612

/* Re-raise priviliges */

1711

1613

errno = 0;

1712

1614

ret = seteuid(0);

1713

1615

if(ret == -1){

1714

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");

1715

1675

} else {

1716

struct stat st;

1717

1718

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

1719

int seckey_fd = open(seckey, O_RDONLY);

1720

if(seckey_fd == -1){

1721

perror_plus("open");

1722

} else {

1723

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

1724

if(ret == -1){

1725

perror_plus("fstat");

1726

} else {

1727

if(S_ISREG(st.st_mode)

1728

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

1729

ret = fchown(seckey_fd, uid, gid);

1730

if(ret == -1){

1731

perror_plus("fchown");

1732

}

1733

}

1734

}

1735

TEMP_FAILURE_RETRY(close(seckey_fd));

1736

}

1737

}

1738

1739

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

1740

int pubkey_fd = open(pubkey, O_RDONLY);

1741

if(pubkey_fd == -1){

1742

perror_plus("open");

1743

} else {

1744

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

1745

if(ret == -1){

1746

perror_plus("fstat");

1747

} else {

1748

if(S_ISREG(st.st_mode)

1749

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

1750

ret = fchown(pubkey_fd, uid, gid);

1751

if(ret == -1){

1752

perror_plus("fchown");

1753

}

1754

}

1755

}

1756

TEMP_FAILURE_RETRY(close(pubkey_fd));

1757

}

1758

}

1759

1760

/* Lower privileges */

1761

errno = 0;

1762

ret = seteuid(uid);

1763

if(ret == -1){

1764

perror_plus("seteuid");

1765

}

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);

1766

1763

}

1767

1764

}

1768

1765

1769

/* Run network hooks */

1770

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

1771

goto end;

1772

}

1773

1774

1766

if(not debug){

1775

1767

avahi_set_log_function(empty_log);

1776

1768

}

1790

1782

/* Pick the first interface returned */

1791

1783

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

1792

1784

if(debug){

1793

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

1785

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

1786

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

1794

1787

}

1795

1788

if(interface == NULL){

1796

1789

perror_plus("malloc");

1801

1794

free(direntries);

1802

1795

} else {

1803

1796

free(direntries);

1804

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");

1805

1799

exitcode = EXIT_FAILURE;

1806

1800

goto end;

1807

1801

}

1813

1807

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

1814

1808

mc.simple_poll = avahi_simple_poll_new();

1815

1809

if(mc.simple_poll == NULL){

1816

fprintf_plus(stderr,

1817

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

1810

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

1811

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

1818

1812

exitcode = EX_UNAVAILABLE;

1819

1813

goto end;

1820

1814

}

1886

1880

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

1887

1881

if_index = (AvahiIfIndex) if_nametoindex(interface);

1888

1882

if(if_index == 0){

1889

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

1883

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

1884

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

1890

1885

exitcode = EX_UNAVAILABLE;

1891

1886

goto end;

1892

1887

}

2012

2007

#endif /* __linux__ */

2013

2008

/* Lower privileges */

2014

2009

errno = 0;

2015

/* Lower privileges */

2016

ret = seteuid(uid);

2017

if(ret == -1){

2018

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

}

2019

2022

}

2020

2023

}

2021

2024

2025

2028

2026

2029

ret = init_gnutls_global(pubkey, seckey);

2027

2030

if(ret == -1){

2028

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

2031

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

2032

"init_gnutls_global failed\n");

2029

2033

exitcode = EX_UNAVAILABLE;

2030

2034

goto end;

2031

2035

} else {

2047

2051

}

2048

2052

2049

2053

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

2050

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

2054

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

2055

"init_gpgme failed\n");

2051

2056

exitcode = EX_UNAVAILABLE;

2052

2057

goto end;

2053

2058

} else {

2063

2068

/* (Mainly meant for debugging) */

2064

2069

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

2065

2070

if(address == NULL){

2066

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

2071

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

2072

"No colon in address\n");

2067

2073

exitcode = EX_USAGE;

2068

2074

goto end;

2069

2075

}

2077

2083

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

2078

2084

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

2079

2085

or tmpmax != (uint16_t)tmpmax){

2080

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

2086

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

2087

"Bad port number\n");

2081

2088

exitcode = EX_USAGE;

2082

2089

goto end;

2083

2090

}

2113

2120

break;

2114

2121

}

2115

2122

if(debug){

2116

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

2117

(int)retry_interval);

2123

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

2124

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

2118

2125

}

2119

2126

sleep((int)retry_interval);

2120

2127

}

2150

2157

2151

2158

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

2152

2159

if(mc.server == NULL){

2153

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

2154

avahi_strerror(error));

2160

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

2161

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

2162

avahi_strerror(error));

2155

2163

exitcode = EX_UNAVAILABLE;

2156

2164

goto end;

2157

2165

}

2165

2173

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

2166

2174

NULL, 0, browse_callback, NULL);

2167

2175

if(sb == NULL){

2168

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

2169

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)));

2170

2179

exitcode = EX_UNAVAILABLE;

2171

2180

goto end;

2172

2181

}

2178

2187

/* Run the main loop */

2179

2188

2180

2189

if(debug){

2181

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

2190

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

2191

"Starting Avahi loop search\n");

2182

2192

}

2183

2193

2184

2194

ret = avahi_loop_with_timeout(mc.simple_poll,

2185

2195

(int)(retry_interval * 1000));

2186

2196

if(debug){

2187

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

2188

(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");

2189

2200

}

2190

2201

2191

2202

end:

2192

2203

2193

2204

if(debug){

2194

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

2205

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

2206

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

2195

2207

}

2196

2208

2197

2209

/* Cleanup things */

2213

2225

if(gpgme_initialized){

2214

2226

gpgme_release(mc.ctx);

2215

2227

}

2216

2228

2217

2229

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

2218

2230

has seen */

2219

2231

if(mc.current_server != NULL){

2225

2237

}

2226

2238

}

2227

2239

2228

/* Run network hooks */

2229

run_network_hooks("stop", interface, delay);

2240

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

2230

2241

2231

/* Re-raise priviliges */

2232

{

2242

/* Take down the network interface */

2243

if(take_down_interface){

2244

/* Re-raise priviliges */

2233

2245

errno = 0;

2234

2246

ret = seteuid(0);

2235

2247

if(ret == -1){

2236

2248

perror_plus("seteuid");

2237

2249

}

2238

2239

/* Take down the network interface */

2240

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

2250

if(geteuid() == 0){

2241

2251

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

2242

2252

if(ret == -1){

2243

2253

perror_plus("ioctl SIOCGIFFLAGS");

2252

2262

if(ret == -1){

2253

2263

perror_plus("close");

2254

2264

}

2265

/* Lower privileges permanently */

2266

errno = 0;

2267

ret = setuid(uid);

2268

if(ret == -1){

2269

perror_plus("setuid");

2270

}

2255

2271

}

2256

2272

}

2257

/* Lower privileges permanently */

2258

errno = 0;

2259

ret = setuid(uid);

2260

if(ret == -1){

2261

perror_plus("setuid");

2262

}

2263

2273

2264

2274

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

2265

2275

if(tempdir_created){

2279

2289

}

2280

2290

ret = remove(fullname);

2281

2291

if(ret == -1){

2282

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

2283

strerror(errno));

2292

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

2293

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

2284

2294

}

2285

2295

free(fullname);

2286

2296

}