/mandos/trunk : revision 295

42

#include <stddef.h> /* NULL, size_t, ssize_t */

43

#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,

44

srand() */

45

#include <stdbool.h> /* bool, false, true */

45

#include <stdbool.h> /* bool, true */

46

#include <string.h> /* memset(), strcmp(), strlen(),

47

strerror(), asprintf(), strcpy() */

48

#include <sys/ioctl.h> /* ioctl */

48

#include <sys/ioctl.h> /* ioctl */

49

#include <sys/types.h> /* socket(), inet_pton(), sockaddr,

50

sockaddr_in6, PF_INET6,

51

SOCK_STREAM, uid_t, gid_t, open(),

52

opendir(), DIR */

51

SOCK_STREAM, INET6_ADDRSTRLEN,

52

uid_t, gid_t, open(), opendir(),

53

DIR */

53

54

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

54

55

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

55

inet_pton(), connect() */

56

struct in6_addr, inet_pton(),

57

connect() */

56

58

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

57

59

#include <dirent.h> /* opendir(), struct dirent, readdir()

58

60

*/

63

65

#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,

64

66

SIOCSIFFLAGS, if_indextoname(),

65

67

if_nametoindex(), IF_NAMESIZE */

66

#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,

67

INET_ADDRSTRLEN, INET6_ADDRSTRLEN

68

*/

68

#include <netinet/in.h>

69

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

70

getuid(), getgid(), setuid(),

71

setgid() */

72

#include <arpa/inet.h> /* inet_pton(), htons */

73

#include <iso646.h> /* not, or, and */

73

#include <iso646.h> /* not, and, or */

74

#include <argp.h> /* struct argp_option, error_t, struct

75

argp_state, struct argp,

76

argp_parse(), ARGP_KEY_ARG,

77

ARGP_KEY_END, ARGP_ERR_UNKNOWN */

78

#include <signal.h> /* sigemptyset(), sigaddset(),

79

sigaction(), SIGTERM, sigaction,

80

sig_atomic_t */

81

82

78

#ifdef __linux__

83

79

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

84

#endif /* __linux__ */

80

#endif

85

81

86

82

/* Avahi */

87

83

/* All Avahi types, constants and functions

133

129

gpgme_ctx_t ctx;

134

130

} mandos_context;

135

131

136

/* global context so signal handler can reach it*/

137

mandos_context mc;

138

139

132

/*

140

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

141

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

133

* Make room in "buffer" for at least BUFFER_SIZE additional bytes.

134

* "buffer_capacity" is how much is currently allocated,

142

135

* "buffer_length" is how much is already used.

143

136

*/

144

size_t incbuffer(char **buffer, size_t buffer_length,

137

size_t adjustbuffer(char **buffer, size_t buffer_length,

145

138

size_t buffer_capacity){

146

139

if(buffer_length + BUFFER_SIZE > buffer_capacity){

147

140

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

156

149

/*

157

150

* Initialize GPGME.

158

151

*/

159

static bool init_gpgme(const char *seckey,

152

static bool init_gpgme(mandos_context *mc, const char *seckey,

160

153

const char *pubkey, const char *tempdir){

161

154

int ret;

162

155

gpgme_error_t rc;

183

176

return false;

184

177

}

185

178

186

rc = gpgme_op_import(mc.ctx, pgp_data);

179

rc = gpgme_op_import(mc->ctx, pgp_data);

187

180

if(rc != GPG_ERR_NO_ERROR){

188

181

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

189

182

gpgme_strsource(rc), gpgme_strerror(rc));

199

192

}

200

193

201

194

if(debug){

202

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

195

fprintf(stderr, "Initialize gpgme\n");

203

196

}

204

197

205

198

/* Init GPGME */

232

225

}

233

226

234

227

/* Create new GPGME "context" */

235

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

228

rc = gpgme_new(&(mc->ctx));

236

229

if(rc != GPG_ERR_NO_ERROR){

237

230

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

238

231

gpgme_strsource(rc), gpgme_strerror(rc));

250

243

* Decrypt OpenPGP data.

251

244

* Returns -1 on error

252

245

*/

253

static ssize_t pgp_packet_decrypt(const char *cryptotext,

246

static ssize_t pgp_packet_decrypt(const mandos_context *mc,

247

const char *cryptotext,

254

248

size_t crypto_size,

255

249

char **plaintext){

256

250

gpgme_data_t dh_crypto, dh_plain;

283

277

284

278

/* Decrypt data from the cryptotext data buffer to the plaintext

285

279

data buffer */

286

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

280

rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);

287

281

if(rc != GPG_ERR_NO_ERROR){

288

282

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

289

283

gpgme_strsource(rc), gpgme_strerror(rc));

290

284

plaintext_length = -1;

291

285

if(debug){

292

286

gpgme_decrypt_result_t result;

293

result = gpgme_op_decrypt_result(mc.ctx);

287

result = gpgme_op_decrypt_result(mc->ctx);

294

288

if(result == NULL){

295

289

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

296

290

} else {

332

326

333

327

*plaintext = NULL;

334

328

while(true){

335

plaintext_capacity = incbuffer(plaintext,

329

plaintext_capacity = adjustbuffer(plaintext,

336

330

(size_t)plaintext_length,

337

331

plaintext_capacity);

338

332

if(plaintext_capacity == 0){

339

perror("incbuffer");

333

perror("adjustbuffer");

340

334

plaintext_length = -1;

341

335

goto decrypt_end;

342

336

}

388

382

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

389

383

}

390

384

391

static int init_gnutls_global(const char *pubkeyfilename,

385

static int init_gnutls_global(mandos_context *mc,

386

const char *pubkeyfilename,

392

387

const char *seckeyfilename){

393

388

int ret;

394

389

412

407

}

413

408

414

409

/* OpenPGP credentials */

415

gnutls_certificate_allocate_credentials(&mc.cred);

410

gnutls_certificate_allocate_credentials(&mc->cred);

416

411

if(ret != GNUTLS_E_SUCCESS){

417

412

fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning

418

from

419

-Wunreachable-code

420

*/

413

* from

414

* -Wunreachable-code

415

*/

421

416

safer_gnutls_strerror(ret));

422

417

gnutls_global_deinit();

423

418

return -1;

430

425

}

431

426

432

427

ret = gnutls_certificate_set_openpgp_key_file

433

(mc.cred, pubkeyfilename, seckeyfilename,

428

(mc->cred, pubkeyfilename, seckeyfilename,

434

429

GNUTLS_OPENPGP_FMT_BASE64);

435

430

if(ret != GNUTLS_E_SUCCESS){

436

431

fprintf(stderr,

442

437

}

443

438

444

439

/* GnuTLS server initialization */

445

ret = gnutls_dh_params_init(&mc.dh_params);

440

ret = gnutls_dh_params_init(&mc->dh_params);

446

441

if(ret != GNUTLS_E_SUCCESS){

447

442

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

448

443

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

449

444

goto globalfail;

450

445

}

451

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

446

ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);

452

447

if(ret != GNUTLS_E_SUCCESS){

453

448

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

454

449

safer_gnutls_strerror(ret));

455

450

goto globalfail;

456

451

}

457

452

458

gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);

453

gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);

459

454

460

455

return 0;

461

456

462

457

globalfail:

463

458

464

gnutls_certificate_free_credentials(mc.cred);

459

gnutls_certificate_free_credentials(mc->cred);

465

460

gnutls_global_deinit();

466

gnutls_dh_params_deinit(mc.dh_params);

461

gnutls_dh_params_deinit(mc->dh_params);

467

462

return -1;

468

463

}

469

464

470

static int init_gnutls_session(gnutls_session_t *session){

465

static int init_gnutls_session(mandos_context *mc,

466

gnutls_session_t *session){

471

467

int ret;

472

468

/* GnuTLS session creation */

473

469

ret = gnutls_init(session, GNUTLS_SERVER);

478

474

479

475

{

480

476

const char *err;

481

ret = gnutls_priority_set_direct(*session, mc.priority, &err);

477

ret = gnutls_priority_set_direct(*session, mc->priority, &err);

482

478

if(ret != GNUTLS_E_SUCCESS){

483

479

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

484

480

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

489

485

}

490

486

491

487

ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,

492

mc.cred);

488

mc->cred);

493

489

if(ret != GNUTLS_E_SUCCESS){

494

490

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

495

491

safer_gnutls_strerror(ret));

501

497

gnutls_certificate_server_set_request(*session,

502

498

GNUTLS_CERT_IGNORE);

503

499

504

gnutls_dh_set_prime_bits(*session, mc.dh_bits);

500

gnutls_dh_set_prime_bits(*session, mc->dh_bits);

505

501

506

502

return 0;

507

503

}

513

509

/* Called when a Mandos server is found */

514

510

static int start_mandos_communication(const char *ip, uint16_t port,

515

511

AvahiIfIndex if_index,

516

int af){

512

mandos_context *mc){

517

513

int ret, tcp_sd;

518

514

ssize_t sret;

519

union {

520

struct sockaddr_in in;

521

struct sockaddr_in6 in6;

522

} to;

515

union { struct sockaddr in; struct sockaddr_in6 in6; } to;

523

516

char *buffer = NULL;

524

517

char *decrypted_buffer;

525

518

size_t buffer_length = 0;

527

520

ssize_t decrypted_buffer_size;

528

521

size_t written;

529

522

int retval = 0;

523

char interface[IF_NAMESIZE];

530

524

gnutls_session_t session;

531

int pf; /* Protocol family */

532

533

switch(af){

534

case AF_INET6:

535

pf = PF_INET6;

536

break;

537

case AF_INET:

538

pf = PF_INET;

539

break;

540

default:

541

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

542

return -1;

543

}

544

545

ret = init_gnutls_session(&session);

525

526

ret = init_gnutls_session(mc, &session);

546

527

if(ret != 0){

547

528

return -1;

548

529

}

549

530

550

531

if(debug){

551

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

532

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

552

533

"\n", ip, port);

553

534

}

554

535

555

tcp_sd = socket(pf, SOCK_STREAM, 0);

536

tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);

556

537

if(tcp_sd < 0){

557

538

perror("socket");

558

539

return -1;

559

540

}

560

541

542

if(debug){

543

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

544

perror("if_indextoname");

545

return -1;

546

}

547

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

548

}

549

561

550

memset(&to, 0, sizeof(to));

562

if(af == AF_INET6){

563

to.in6.sin6_family = (uint16_t)af;

564

ret = inet_pton(af, ip, &to.in6.sin6_addr);

565

} else { /* IPv4 */

566

to.in.sin_family = (sa_family_t)af;

567

ret = inet_pton(af, ip, &to.in.sin_addr);

568

}

551

to.in6.sin6_family = AF_INET6;

552

/* It would be nice to have a way to detect if we were passed an

553

IPv4 address here. Now we assume an IPv6 address. */

554

ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);

569

555

if(ret < 0 ){

570

556

perror("inet_pton");

571

557

return -1;

574

560

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

575

561

return -1;

576

562

}

577

if(af == AF_INET6){

578

to.in6.sin6_port = htons(port); /* Spurious warnings from

579

-Wconversion and

580

-Wunreachable-code */

581

582

if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */

583

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

584

-Wunreachable-code*/

585

if(if_index == AVAHI_IF_UNSPEC){

586

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

587

" without a network interface\n");

588

return -1;

589

}

590

/* Set the network interface number as scope */

591

to.in6.sin6_scope_id = (uint32_t)if_index;

592

}

593

} else {

594

to.in.sin_port = htons(port); /* Spurious warnings from

563

to.in6.sin6_port = htons(port); /* Spurious warnings from

595

564

-Wconversion and

596

565

-Wunreachable-code */

597

}

566

567

to.in6.sin6_scope_id = (uint32_t)if_index;

598

568

599

569

if(debug){

600

if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){

601

char interface[IF_NAMESIZE];

602

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

603

perror("if_indextoname");

604

} else {

605

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

606

ip, interface, port);

607

}

608

} else {

609

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

610

port);

611

}

612

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

613

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

614

const char *pcret;

615

if(af == AF_INET6){

616

pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,

617

sizeof(addrstr));

618

} else {

619

pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,

620

sizeof(addrstr));

621

}

622

if(pcret == NULL){

570

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

571

port);

572

char addrstr[INET6_ADDRSTRLEN] = "";

573

if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,

574

sizeof(addrstr)) == NULL){

623

575

perror("inet_ntop");

624

576

} else {

625

577

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

628

580

}

629

581

}

630

582

631

if(af == AF_INET6){

632

ret = connect(tcp_sd, &to.in6, sizeof(to));

633

} else {

634

ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */

635

}

583

ret = connect(tcp_sd, &to.in, sizeof(to));

636

584

if(ret < 0){

637

585

perror("connect");

638

586

return -1;

684

632

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

685

633

686

634

if(debug){

687

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

635

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

688

636

ip);

689

637

}

690

638

691

639

while(true){

692

buffer_capacity = incbuffer(&buffer, buffer_length,

640

buffer_capacity = adjustbuffer(&buffer, buffer_length,

693

641

buffer_capacity);

694

642

if(buffer_capacity == 0){

695

perror("incbuffer");

643

perror("adjustbuffer");

696

644

retval = -1;

697

645

goto mandos_end;

698

646

}

737

685

gnutls_bye(session, GNUTLS_SHUT_RDWR);

738

686

739

687

if(buffer_length > 0){

740

decrypted_buffer_size = pgp_packet_decrypt(buffer,

688

decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,

741

689

buffer_length,

742

690

&decrypted_buffer);

743

691

if(decrypted_buffer_size >= 0){

778

726

779

727

static void resolve_callback(AvahiSServiceResolver *r,

780

728

AvahiIfIndex interface,

781

AvahiProtocol proto,

729

AVAHI_GCC_UNUSED AvahiProtocol protocol,

782

730

AvahiResolverEvent event,

783

731

const char *name,

784

732

const char *type,

789

737

AVAHI_GCC_UNUSED AvahiStringList *txt,

790

738

AVAHI_GCC_UNUSED AvahiLookupResultFlags

791

739

flags,

792

AVAHI_GCC_UNUSED void* userdata){

740

void* userdata){

741

mandos_context *mc = userdata;

793

742

assert(r);

794

743

795

744

/* Called whenever a service has been resolved successfully or

800

749

case AVAHI_RESOLVER_FAILURE:

801

750

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

802

751

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

803

avahi_strerror(avahi_server_errno(mc.server)));

752

avahi_strerror(avahi_server_errno(mc->server)));

804

753

break;

805

754

806

755

case AVAHI_RESOLVER_FOUND:

812

761

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

813

762

ip, (intmax_t)interface, port);

814

763

}

815

int ret = start_mandos_communication(ip, port, interface,

816

avahi_proto_to_af(proto));

764

int ret = start_mandos_communication(ip, port, interface, mc);

817

765

if(ret == 0){

818

avahi_simple_poll_quit(mc.simple_poll);

766

avahi_simple_poll_quit(mc->simple_poll);

819

767

}

820

768

}

821

769

}

831

779

const char *domain,

832

780

AVAHI_GCC_UNUSED AvahiLookupResultFlags

833

781

flags,

834

AVAHI_GCC_UNUSED void* userdata){

782

void* userdata){

783

mandos_context *mc = userdata;

835

784

assert(b);

836

785

837

786

/* Called whenever a new services becomes available on the LAN or

842

791

case AVAHI_BROWSER_FAILURE:

843

792

844

793

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

845

avahi_strerror(avahi_server_errno(mc.server)));

846

avahi_simple_poll_quit(mc.simple_poll);

794

avahi_strerror(avahi_server_errno(mc->server)));

795

avahi_simple_poll_quit(mc->simple_poll);

847

796

return;

848

797

849

798

case AVAHI_BROWSER_NEW:

852

801

the callback function is called the Avahi server will free the

853

802

resolver for us. */

854

803

855

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

804

if(!(avahi_s_service_resolver_new(mc->server, interface,

856

805

protocol, name, type, domain,

857

806

AVAHI_PROTO_INET6, 0,

858

resolve_callback, NULL)))

807

resolve_callback, mc)))

859

808

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

860

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

809

name, avahi_strerror(avahi_server_errno(mc->server)));

861

810

break;

862

811

863

812

case AVAHI_BROWSER_REMOVE:

872

821

}

873

822

}

874

823

875

sig_atomic_t quit_now = 0;

876

877

static void handle_sigterm(__attribute__((unused)) int sig){

878

if(quit_now){

879

return;

880

}

881

quit_now = 1;

882

int old_errno = errno;

883

if(mc.simple_poll != NULL){

884

avahi_simple_poll_quit(mc.simple_poll);

885

}

886

errno = old_errno;

887

}

888

889

824

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

890

825

AvahiSServiceBrowser *sb = NULL;

891

826

int error;

905

840

const char *seckey = PATHDIR "/" SECKEY;

906

841

const char *pubkey = PATHDIR "/" PUBKEY;

907

842

908

/* Initialize Mandos context */

909

mc = (mandos_context){ .simple_poll = NULL, .server = NULL,

910

.dh_bits = 1024, .priority = "SECURE256"

911

":!CTYPE-X.509:+CTYPE-OPENPGP" };

843

mandos_context mc = { .simple_poll = NULL, .server = NULL,

844

.dh_bits = 1024, .priority = "SECURE256"

845

":!CTYPE-X.509:+CTYPE-OPENPGP" };

912

846

bool gnutls_initialized = false;

913

847

bool gpgme_initialized = false;

914

848

double delay = 2.5;

915

916

struct sigaction old_sigterm_action;

917

struct sigaction sigterm_action = { .sa_handler = handle_sigterm };

918

849

919

850

{

920

851

struct argp_option options[] = {

926

857

.group = 1 },

927

858

{ .name = "interface", .key = 'i',

928

859

.arg = "NAME",

929

.doc = "Network interface that will be used to search for"

930

" Mandos servers",

860

.doc = "Interface that will be used to search for Mandos"

861

" servers",

931

862

.group = 1 },

932

863

{ .name = "seckey", .key = 's',

933

864

.arg = "FILE",

1013

944

}

1014

945

1015

946

/* If the interface is down, bring it up */

1016

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

947

{

1017

948

#ifdef __linux__

1018

949

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1019

950

messages to mess up the prompt */

1020

951

ret = klogctl(8, NULL, 5);

1021

bool restore_loglevel = true;

1022

952

if(ret == -1){

1023

restore_loglevel = false;

1024

953

perror("klogctl");

1025

954

}

1026

#endif /* __linux__ */

955

#endif

1027

956

1028

957

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1029

958

if(sd < 0){

1030

959

perror("socket");

1031

960

exitcode = EXIT_FAILURE;

1032

961

#ifdef __linux__

1033

if(restore_loglevel){

1034

ret = klogctl(7, NULL, 0);

1035

if(ret == -1){

1036

perror("klogctl");

1037

}

962

ret = klogctl(7, NULL, 0);

963

if(ret == -1){

964

perror("klogctl");

1038

965

}

1039

#endif /* __linux__ */

966

#endif

1040

967

goto end;

1041

968

}

1042

969

strcpy(network.ifr_name, interface);

1044

971

if(ret == -1){

1045

972

perror("ioctl SIOCGIFFLAGS");

1046

973

#ifdef __linux__

1047

if(restore_loglevel){

1048

ret = klogctl(7, NULL, 0);

1049

if(ret == -1){

1050

perror("klogctl");

1051

}

974

ret = klogctl(7, NULL, 0);

975

if(ret == -1){

976

perror("klogctl");

1052

977

}

1053

#endif /* __linux__ */

978

#endif

1054

979

exitcode = EXIT_FAILURE;

1055

980

goto end;

1056

981

}

1061

986

perror("ioctl SIOCSIFFLAGS");

1062

987

exitcode = EXIT_FAILURE;

1063

988

#ifdef __linux__

1064

if(restore_loglevel){

1065

ret = klogctl(7, NULL, 0);

1066

if(ret == -1){

1067

perror("klogctl");

1068

}

989

ret = klogctl(7, NULL, 0);

990

if(ret == -1){

991

perror("klogctl");

1069

992

}

1070

#endif /* __linux__ */

993

#endif

1071

994

goto end;

1072

995

}

1073

996

}

1090

1013

perror("close");

1091

1014

}

1092

1015

#ifdef __linux__

1093

if(restore_loglevel){

1094

/* Restores kernel loglevel to default */

1095

ret = klogctl(7, NULL, 0);

1096

if(ret == -1){

1097

perror("klogctl");

1098

}

1016

/* Restores kernel loglevel to default */

1017

ret = klogctl(7, NULL, 0);

1018

if(ret == -1){

1019

perror("klogctl");

1099

1020

}

1100

#endif /* __linux__ */

1021

#endif

1101

1022

}

1102

1023

1103

1024

uid = getuid();

1104

1025

gid = getgid();

1105

1026

1106

errno = 0;

1107

1027

setgid(gid);

1108

1028

if(ret == -1){

1109

1029

perror("setgid");

1114

1034

perror("setuid");

1115

1035

}

1116

1036

1117

ret = init_gnutls_global(pubkey, seckey);

1037

ret = init_gnutls_global(&mc, pubkey, seckey);

1118

1038

if(ret == -1){

1119

1039

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

1120

1040

exitcode = EXIT_FAILURE;

1129

1049

}

1130

1050

tempdir_created = true;

1131

1051

1132

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

1052

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

1133

1053

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

1134

1054

exitcode = EXIT_FAILURE;

1135

1055

goto end;

1137

1057

gpgme_initialized = true;

1138

1058

}

1139

1059

1140

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

1141

if_index = (AvahiIfIndex) if_nametoindex(interface);

1142

if(if_index == 0){

1143

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

1144

exitcode = EXIT_FAILURE;

1145

goto end;

1146

}

1060

if_index = (AvahiIfIndex) if_nametoindex(interface);

1061

if(if_index == 0){

1062

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

1063

exitcode = EXIT_FAILURE;

1064

goto end;

1147

1065

}

1148

1066

1149

1067

if(connect_to != NULL){

1166

1084

port = (uint16_t)tmpmax;

1167

1085

*address = '\0';

1168

1086

address = connect_to;

1169

/* Colon in address indicates IPv6 */

1170

int af;

1171

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

1172

af = AF_INET6;

1173

} else {

1174

af = AF_INET;

1175

}

1176

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

1087

ret = start_mandos_communication(address, port, if_index, &mc);

1177

1088

if(ret < 0){

1178

1089

exitcode = EXIT_FAILURE;

1179

1090

} else {

1226

1137

/* Create the Avahi service browser */

1227

1138

sb = avahi_s_service_browser_new(mc.server, if_index,

1228

1139

AVAHI_PROTO_INET6, "_mandos._tcp",

1229

NULL, 0, browse_callback, NULL);

1140

NULL, 0, browse_callback, &mc);

1230

1141

if(sb == NULL){

1231

1142

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

1232

1143

avahi_strerror(avahi_server_errno(mc.server)));

1234

1145

goto end;

1235

1146

}

1236

1147

1237

sigemptyset(&sigterm_action.sa_mask);

1238

ret = sigaddset(&sigterm_action.sa_mask, SIGINT);

1239

if(ret == -1){

1240

perror("sigaddset");

1241

exitcode = EXIT_FAILURE;

1242

goto end;

1243

}

1244

ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);

1245

if(ret == -1){

1246

perror("sigaddset");

1247

exitcode = EXIT_FAILURE;

1248

goto end;

1249

}

1250

ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);

1251

if(ret == -1){

1252

perror("sigaddset");

1253

exitcode = EXIT_FAILURE;

1254

goto end;

1255

}

1256

ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);

1257

if(ret == -1){

1258

perror("sigaction");

1259

exitcode = EXIT_FAILURE;

1260

goto end;

1261

}

1262

1263

1148

/* Run the main loop */

1264

1149

1265

1150

if(debug){