/mandos/release : revision 237.7.205

9

* "browse_callback", and parts of "main".

10

*

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* Everything else is

12

13

12

13

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*

15

* This program is free software: you can redistribute it and/or

16

* modify it under the terms of the GNU General Public License as

61

*/

62

#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,

63

strtoimax() */

64

#include <assert.h> /* assert() */

65

64

#include <errno.h> /* perror(), errno,

66

65

program_invocation_short_name */

67

66

#include <time.h> /* nanosleep(), time(), sleep() */

145

144

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

146

145

typedef struct server{

147

146

const char *ip;

148

uint16_t port;

147

in_port_t port;

149

148

AvahiIfIndex if_index;

150

149

int af;

151

150

struct timespec last_seen;

155

154

156

155

/* Used for passing in values through the Avahi callback functions */

157

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typedef struct {

158

AvahiSimplePoll *simple_poll;

159

157

AvahiServer *server;

160

158

gnutls_certificate_credentials_t cred;

161

159

unsigned int dh_bits;

163

161

const char *priority;

164

162

gpgme_ctx_t ctx;

165

163

server *current_server;

164

char *interfaces;

165

size_t interfaces_size;

166

} mandos_context;

167

168

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

169

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

170

.dh_bits = 1024, .priority = "SECURE256"

171

":!CTYPE-X.509:+CTYPE-OPENPGP",

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.current_server = NULL };

168

/* global so signal handler can reach it*/

169

AvahiSimplePoll *simple_poll;

173

170

174

171

sig_atomic_t quit_now = 0;

175

172

int signal_received = 0;

190

187

191

188

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

192

189

program_invocation_short_name));

193

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

190

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

194

191

}

195

192

196

193

/*

211

208

}

212

209

213

210

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

214

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

215

int af){

211

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

212

int af, server **current_server){

216

213

int ret;

217

214

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

218

215

if(new_server == NULL){

228

225

return false;

229

226

}

230

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/* Special case of first server */

231

if (mc.current_server == NULL){

228

if(*current_server == NULL){

232

229

new_server->next = new_server;

233

230

new_server->prev = new_server;

234

mc.current_server = new_server;

231

*current_server = new_server;

235

232

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

236

233

} else {

237

new_server->next = mc.current_server;

238

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

234

new_server->next = *current_server;

235

new_server->prev = (*current_server)->prev;

239

236

new_server->prev->next = new_server;

240

mc.current_server->prev = new_server;

237

(*current_server)->prev = new_server;

241

238

}

242

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

239

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

243

240

if(ret == -1){

244

241

perror_plus("clock_gettime");

245

242

return false;

251

248

* Initialize GPGME.

252

249

*/

253

250

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

254

const char *tempdir){

251

const char *tempdir, mandos_context *mc){

255

252

gpgme_error_t rc;

256

253

gpgme_engine_info_t engine_info;

257

254

258

259

255

/*

260

256

* Helper function to insert pub and seckey to the engine keyring.

261

257

*/

277

273

return false;

278

274

}

279

275

280

rc = gpgme_op_import(mc.ctx, pgp_data);

276

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

281

277

if(rc != GPG_ERR_NO_ERROR){

282

278

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

283

279

gpgme_strsource(rc), gpgme_strerror(rc));

327

323

}

328

324

329

325

/* Create new GPGME "context" */

330

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

326

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

331

327

if(rc != GPG_ERR_NO_ERROR){

332

328

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

333

329

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

348

344

*/

349

345

static ssize_t pgp_packet_decrypt(const char *cryptotext,

350

346

size_t crypto_size,

351

char **plaintext){

347

char **plaintext,

348

mandos_context *mc){

352

349

gpgme_data_t dh_crypto, dh_plain;

353

350

gpgme_error_t rc;

354

351

ssize_t ret;

380

377

381

378

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

382

379

data buffer */

383

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

380

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

384

381

if(rc != GPG_ERR_NO_ERROR){

385

382

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

386

383

gpgme_strsource(rc), gpgme_strerror(rc));

387

384

plaintext_length = -1;

388

385

if(debug){

389

386

gpgme_decrypt_result_t result;

390

result = gpgme_op_decrypt_result(mc.ctx);

387

result = gpgme_op_decrypt_result(mc->ctx);

391

388

if(result == NULL){

392

389

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

393

390

} else {

471

468

}

472

469

473

470

static const char * safer_gnutls_strerror(int value){

474

const char *ret = gnutls_strerror(value); /* Spurious warning from

475

-Wunreachable-code */

471

const char *ret = gnutls_strerror(value);

476

472

if(ret == NULL)

477

473

ret = "(unknown)";

478

474

return ret;

485

481

}

486

482

487

483

static int init_gnutls_global(const char *pubkeyfilename,

488

const char *seckeyfilename){

484

const char *seckeyfilename,

485

mandos_context *mc){

489

486

int ret;

490

487

491

488

if(debug){

508

505

}

509

506

510

507

/* OpenPGP credentials */

511

ret = gnutls_certificate_allocate_credentials(&mc.cred);

508

ret = gnutls_certificate_allocate_credentials(&mc->cred);

512

509

if(ret != GNUTLS_E_SUCCESS){

513

510

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

514

511

safer_gnutls_strerror(ret));

524

521

}

525

522

526

523

ret = gnutls_certificate_set_openpgp_key_file

527

(mc.cred, pubkeyfilename, seckeyfilename,

524

(mc->cred, pubkeyfilename, seckeyfilename,

528

525

GNUTLS_OPENPGP_FMT_BASE64);

529

526

if(ret != GNUTLS_E_SUCCESS){

530

527

fprintf_plus(stderr,

536

533

}

537

534

538

535

/* GnuTLS server initialization */

539

ret = gnutls_dh_params_init(&mc.dh_params);

536

ret = gnutls_dh_params_init(&mc->dh_params);

540

537

if(ret != GNUTLS_E_SUCCESS){

541

538

fprintf_plus(stderr, "Error in GnuTLS DH parameter"

542

539

" initialization: %s\n",

543

540

safer_gnutls_strerror(ret));

544

541

goto globalfail;

545

542

}

546

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

543

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

547

544

if(ret != GNUTLS_E_SUCCESS){

548

545

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

549

546

safer_gnutls_strerror(ret));

550

547

goto globalfail;

551

548

}

552

549

553

gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);

550

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

554

551

555

552

return 0;

556

553

557

554

globalfail:

558

555

559

gnutls_certificate_free_credentials(mc.cred);

556

gnutls_certificate_free_credentials(mc->cred);

560

557

gnutls_global_deinit();

561

gnutls_dh_params_deinit(mc.dh_params);

558

gnutls_dh_params_deinit(mc->dh_params);

562

559

return -1;

563

560

}

564

561

565

static int init_gnutls_session(gnutls_session_t *session){

562

static int init_gnutls_session(gnutls_session_t *session,

563

mandos_context *mc){

566

564

int ret;

567

565

/* GnuTLS session creation */

568

566

do {

580

578

{

581

579

const char *err;

582

580

do {

583

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

581

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

584

582

if(quit_now){

585

583

gnutls_deinit(*session);

586

584

return -1;

597

595

598

596

do {

599

597

ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,

600

mc.cred);

598

mc->cred);

601

599

if(quit_now){

602

600

gnutls_deinit(*session);

603

601

return -1;

613

611

/* ignore client certificate if any. */

614

612

gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);

615

613

616

gnutls_dh_set_prime_bits(*session, mc.dh_bits);

614

gnutls_dh_set_prime_bits(*session, mc->dh_bits);

617

615

618

616

return 0;

619

617

}

623

621

__attribute__((unused)) const char *txt){}

624

622

625

623

/* Called when a Mandos server is found */

626

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

624

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

627

625

AvahiIfIndex if_index,

628

int af){

626

int af, mandos_context *mc){

629

627

int ret, tcp_sd = -1;

630

628

ssize_t sret;

631

629

union {

661

659

return -1;

662

660

}

663

661

664

ret = init_gnutls_session(&session);

662

/* If the interface is specified and we have a list of interfaces */

663

if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){

664

/* Check if the interface is one of the interfaces we are using */

665

bool match = false;

666

{

667

char *interface = NULL;

668

while((interface=argz_next(mc->interfaces, mc->interfaces_size,

669

interface))){

670

if(if_nametoindex(interface) == (unsigned int)if_index){

671

match = true;

672

break;

673

}

674

}

675

}

676

if(not match){

677

/* This interface does not match any in the list, so we don't

678

connect to the server */

679

if(debug){

680

char interface[IF_NAMESIZE];

681

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

682

perror_plus("if_indextoname");

683

} else {

684

fprintf_plus(stderr, "Skipping server on non-used interface"

685

" \"%s\"\n",

686

if_indextoname((unsigned int)if_index,

687

interface));

688

}

689

}

690

return -1;

691

}

692

}

693

694

ret = init_gnutls_session(&session, mc);

665

695

if(ret != 0){

666

696

return -1;

667

697

}

668

698

669

699

if(debug){

670

700

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

671

PRIu16 "\n", ip, port);

701

PRIuMAX "\n", ip, (uintmax_t)port);

672

702

}

673

703

674

704

tcp_sd = socket(pf, SOCK_STREAM, 0);

705

735

goto mandos_end;

706

736

}

707

737

if(af == AF_INET6){

708

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

709

-Wconversion and

710

-Wunreachable-code */

711

738

to.in6.sin6_port = htons(port);

739

#ifdef __GNUC__

740

#pragma GCC diagnostic push

741

#pragma GCC diagnostic ignored "-Wstrict-aliasing"

742

#endif

712

743

if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */

713

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

714

-Wunreachable-code*/

744

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

745

#ifdef __GNUC__

746

#pragma GCC diagnostic pop

747

#endif

715

748

if(if_index == AVAHI_IF_UNSPEC){

716

749

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

717

750

" incomplete without a network interface\n");

722

755

to.in6.sin6_scope_id = (uint32_t)if_index;

723

756

}

724

757

} else {

725

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

726

-Wconversion and

727

-Wunreachable-code */

758

to.in.sin_port = htons(port);

728

759

}

729

760

730

761

if(quit_now){

738

769

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

739

770

perror_plus("if_indextoname");

740

771

} else {

741

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

742

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

772

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

773

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

743

774

}

744

775

} else {

745

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

746

ip, port);

776

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

777

ip, (uintmax_t)port);

747

778

}

748

779

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

749

780

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

942

973

if(buffer_length > 0){

943

974

ssize_t decrypted_buffer_size;

944

975

decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,

945

&decrypted_buffer);

976

&decrypted_buffer, mc);

946

977

if(decrypted_buffer_size >= 0){

947

978

948

979

written = 0;

1009

1040

AVAHI_GCC_UNUSED AvahiStringList *txt,

1010

1041

AVAHI_GCC_UNUSED AvahiLookupResultFlags

1011

1042

flags,

1012

AVAHI_GCC_UNUSED void* userdata){

1013

assert(r);

1043

void* mc){

1044

if(r == NULL){

1045

return;

1046

}

1014

1047

1015

1048

/* Called whenever a service has been resolved successfully or

1016

1049

timed out */

1025

1058

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

1026

1059

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

1027

1060

domain,

1028

avahi_strerror(avahi_server_errno(mc.server)));

1061

avahi_strerror(avahi_server_errno

1062

(((mandos_context*)mc)->server)));

1029

1063

break;

1030

1064

1031

1065

case AVAHI_RESOLVER_FOUND:

1037

1071

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

1038

1072

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

1039

1073

}

1040

int ret = start_mandos_communication(ip, port, interface,

1041

avahi_proto_to_af(proto));

1074

int ret = start_mandos_communication(ip, (in_port_t)port,

1075

interface,

1076

avahi_proto_to_af(proto),

1077

mc);

1042

1078

if(ret == 0){

1043

avahi_simple_poll_quit(mc.simple_poll);

1079

avahi_simple_poll_quit(simple_poll);

1044

1080

} else {

1045

if(not add_server(ip, port, interface,

1046

avahi_proto_to_af(proto))){

1081

if(not add_server(ip, (in_port_t)port, interface,

1082

avahi_proto_to_af(proto),

1083

&((mandos_context*)mc)->current_server)){

1047

1084

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

1048

1085

" list\n", name);

1049

1086

}

1062

1099

const char *domain,

1063

1100

AVAHI_GCC_UNUSED AvahiLookupResultFlags

1064

1101

flags,

1065

AVAHI_GCC_UNUSED void* userdata){

1066

assert(b);

1102

void* mc){

1103

if(b == NULL){

1104

return;

1105

}

1067

1106

1068

1107

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

1069

1108

is removed from the LAN */

1077

1116

case AVAHI_BROWSER_FAILURE:

1078

1117

1079

1118

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

1080

avahi_strerror(avahi_server_errno(mc.server)));

1081

avahi_simple_poll_quit(mc.simple_poll);

1119

avahi_strerror(avahi_server_errno

1120

(((mandos_context*)mc)->server)));

1121

avahi_simple_poll_quit(simple_poll);

1082

1122

return;

1083

1123

1084

1124

case AVAHI_BROWSER_NEW:

1087

1127

the callback function is called the Avahi server will free the

1088

1128

resolver for us. */

1089

1129

1090

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

1091

name, type, domain, protocol, 0,

1092

resolve_callback, NULL) == NULL)

1130

if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,

1131

interface, protocol, name, type,

1132

domain, protocol, 0,

1133

resolve_callback, mc) == NULL)

1093

1134

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

1094

1135

" %s\n", name,

1095

avahi_strerror(avahi_server_errno(mc.server)));

1136

avahi_strerror(avahi_server_errno

1137

(((mandos_context*)mc)->server)));

1096

1138

break;

1097

1139

1098

1140

case AVAHI_BROWSER_REMOVE:

1117

1159

signal_received = sig;

1118

1160

int old_errno = errno;

1119

1161

/* set main loop to exit */

1120

if(mc.simple_poll != NULL){

1121

avahi_simple_poll_quit(mc.simple_poll);

1162

if(simple_poll != NULL){

1163

avahi_simple_poll_quit(simple_poll);

1122

1164

}

1123

1165

errno = old_errno;

1124

1166

}

1318

1360

return 1;

1319

1361

}

1320

1362

1321

int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){

1363

int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,

1364

mandos_context *mc){

1322

1365

int ret;

1323

1366

struct timespec now;

1324

1367

struct timespec waited_time;

1325

1368

intmax_t block_time;

1326

1369

1327

1370

while(true){

1328

if(mc.current_server == NULL){

1371

if(mc->current_server == NULL){

1329

1372

if (debug){

1330

1373

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

1331

1374

" No timeout!\n");

1345

1388

/* Calculating in ms how long time between now and server

1346

1389

who we visted longest time ago. Now - last seen. */

1347

1390

waited_time.tv_sec = (now.tv_sec

1348

- mc.current_server->last_seen.tv_sec);

1391

- mc->current_server->last_seen.tv_sec);

1349

1392

waited_time.tv_nsec = (now.tv_nsec

1350

- mc.current_server->last_seen.tv_nsec);

1393

- mc->current_server->last_seen.tv_nsec);

1351

1394

/* total time is 10s/10,000ms.

1352

1395

Converting to s from ms by dividing by 1,000,

1353

1396

and ns to ms by dividing by 1,000,000. */

1361

1404

}

1362

1405

1363

1406

if(block_time <= 0){

1364

ret = start_mandos_communication(mc.current_server->ip,

1365

mc.current_server->port,

1366

mc.current_server->if_index,

1367

mc.current_server->af);

1407

ret = start_mandos_communication(mc->current_server->ip,

1408

mc->current_server->port,

1409

mc->current_server->if_index,

1410

mc->current_server->af, mc);

1368

1411

if(ret == 0){

1369

avahi_simple_poll_quit(mc.simple_poll);

1412

avahi_simple_poll_quit(s);

1370

1413

return 0;

1371

1414

}

1372

1415

ret = clock_gettime(CLOCK_MONOTONIC,

1373

&mc.current_server->last_seen);

1416

&mc->current_server->last_seen);

1374

1417

if(ret == -1){

1375

1418

perror_plus("clock_gettime");

1376

1419

return -1;

1377

1420

}

1378

mc.current_server = mc.current_server->next;

1421

mc->current_server = mc->current_server->next;

1379

1422

block_time = 0; /* Call avahi to find new Mandos

1380

1423

servers, but don't block */

1381

1424

}

1450

1493

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

1451

1494

alphasort);

1452

1495

if(numhooks == -1){

1453

perror_plus("scandir");

1496

if(errno == ENOENT){

1497

if(debug){

1498

fprintf_plus(stderr, "Network hook directory \"%s\" not"

1499

" found\n", hookdir);

1500

}

1501

} else {

1502

perror_plus("scandir");

1503

}

1454

1504

} else {

1455

1505

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

1456

1506

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

1741

1791

}

1742

1792

1743

1793

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

1794

mandos_context mc = { .server = NULL, .dh_bits = 1024,

1795

.priority = "SECURE256:!CTYPE-X.509:"

1796

"+CTYPE-OPENPGP", .current_server = NULL,

1797

.interfaces = NULL, .interfaces_size = 0 };

1744

1798

AvahiSServiceBrowser *sb = NULL;

1745

1799

error_t ret_errno;

1746

1800

int ret;

1747

1801

intmax_t tmpmax;

1748

1802

char *tmp;

1749

1803

int exitcode = EXIT_SUCCESS;

1750

char *interfaces = NULL;

1751

size_t interfaces_size = 0;

1752

1804

char *interfaces_to_take_down = NULL;

1753

1805

size_t interfaces_to_take_down_size = 0;

1754

1806

char tempdir[] = "/tmp/mandosXXXXXX";

1854

1906

connect_to = arg;

1855

1907

break;

1856

1908

case 'i': /* --interface */

1857

ret_errno = argz_add_sep(&interfaces, &interfaces_size, arg,

1858

(int)',');

1909

ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,

1910

arg, (int)',');

1859

1911

if(ret_errno != 0){

1860

1912

argp_error(state, "%s", strerror(ret_errno));

1861

1913

}

1988

2040

}

1989

2041

1990

2042

/* Lower privileges */

1991

errno = 0;

1992

ret = seteuid(uid);

1993

if(ret == -1){

1994

perror_plus("seteuid");

1995

}

2043

lower_privileges();

1996

2044

}

1997

2045

}

1998

2046

1999

/* Remove empty interface names */

2047

/* Remove invalid interface names (except "none") */

2000

2048

{

2001

2049

char *interface = NULL;

2002

while((interface = argz_next(interfaces, interfaces_size,

2050

while((interface = argz_next(mc.interfaces, mc.interfaces_size,

2003

2051

interface))){

2004

if(if_nametoindex(interface) == 0){

2005

if(interface[0] != '\0' and strcmp(interface, "none") != 0){

2052

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

2053

and if_nametoindex(interface) == 0){

2054

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

2006

2055

fprintf_plus(stderr, "Not using nonexisting interface"

2007

2056

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

2008

2057

}

2009

argz_delete(&interfaces, &interfaces_size, interface);

2058

argz_delete(&mc.interfaces, &mc.interfaces_size, interface);

2010

2059

interface = NULL;

2011

2060

}

2012

2061

}

2014

2063

2015

2064

/* Run network hooks */

2016

2065

{

2017

ret_errno = argz_append(&interfaces_hooks, &interfaces_hooks_size,

2018

interfaces, interfaces_size);

2019

if(ret_errno != 0){

2020

errno = ret_errno;

2021

perror_plus("argz_append");

2022

goto end;

2066

if(mc.interfaces != NULL){

2067

interfaces_hooks = malloc(mc.interfaces_size);

2068

if(interfaces_hooks == NULL){

2069

perror_plus("malloc");

2070

goto end;

2071

}

2072

memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);

2073

interfaces_hooks_size = mc.interfaces_size;

2074

argz_stringify(interfaces_hooks, interfaces_hooks_size,

2075

(int)',');

2023

2076

}

2024

argz_stringify(interfaces_hooks, interfaces_hooks_size, (int)',');

2025

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

2077

if(not run_network_hooks("start", interfaces_hooks != NULL ?

2078

interfaces_hooks : "", delay)){

2026

2079

goto end;

2027

2080

}

2028

2081

}

2035

2088

from the signal handler */

2036

2089

/* Initialize the pseudo-RNG for Avahi */

2037

2090

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

2038

mc.simple_poll = avahi_simple_poll_new();

2039

if(mc.simple_poll == NULL){

2091

simple_poll = avahi_simple_poll_new();

2092

if(simple_poll == NULL){

2040

2093

fprintf_plus(stderr,

2041

2094

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

2042

2095

exitcode = EX_UNAVAILABLE;

2107

2160

}

2108

2161

2109

2162

/* If no interfaces were specified, make a list */

2110

if(interfaces == NULL){

2163

if(mc.interfaces == NULL){

2111

2164

struct dirent **direntries;

2112

2165

/* Look for any good interfaces */

2113

2166

ret = scandir(sys_class_net, &direntries, good_interface,

2115

2168

if(ret >= 1){

2116

2169

/* Add all found interfaces to interfaces list */

2117

2170

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

2118

ret_errno = argz_add(&interfaces, &interfaces_size,

2171

ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,

2119

2172

direntries[i]->d_name);

2120

2173

if(ret_errno != 0){

2121

2174

perror_plus("argz_add");

2135

2188

}

2136

2189

}

2137

2190

2138

/* If we only got one interface, explicitly use only that one */

2139

if(argz_count(interfaces, interfaces_size) == 1){

2140

if(debug){

2141

fprintf_plus(stderr, "Using only interface \"%s\"\n",

2142

interfaces);

2143

}

2144

if_index = (AvahiIfIndex)if_nametoindex(interfaces);

2145

}

2146

2147

/* Bring up interfaces which are down */

2148

if(not (argz_count(interfaces, interfaces_size) == 1

2149

and strcmp(interfaces, "none") == 0)){

2191

/* Bring up interfaces which are down, and remove any "none"s */

2192

{

2150

2193

char *interface = NULL;

2151

while((interface = argz_next(interfaces, interfaces_size,

2194

while((interface = argz_next(mc.interfaces, mc.interfaces_size,

2152

2195

interface))){

2196

/* If interface name is "none", stop bringing up interfaces.

2197

Also remove all instances of "none" from the list */

2198

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

2199

argz_delete(&mc.interfaces, &mc.interfaces_size,

2200

interface);

2201

interface = NULL;

2202

while((interface = argz_next(mc.interfaces,

2203

mc.interfaces_size, interface))){

2204

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

2205

argz_delete(&mc.interfaces, &mc.interfaces_size,

2206

interface);

2207

interface = NULL;

2208

}

2209

}

2210

break;

2211

}

2153

2212

bool interface_was_up = interface_is_up(interface);

2154

2213

ret = bring_up_interface(interface, delay);

2155

2214

if(not interface_was_up){

2163

2222

}

2164

2223

}

2165

2224

}

2166

free(interfaces);

2167

interfaces = NULL;

2168

interfaces_size = 0;

2169

2225

if(debug and (interfaces_to_take_down == NULL)){

2170

2226

fprintf_plus(stderr, "No interfaces were brought up\n");

2171

2227

}

2172

2228

}

2173

2229

2230

/* If we only got one interface, explicitly use only that one */

2231

if(argz_count(mc.interfaces, mc.interfaces_size) == 1){

2232

if(debug){

2233

fprintf_plus(stderr, "Using only interface \"%s\"\n",

2234

mc.interfaces);

2235

}

2236

if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);

2237

}

2238

2174

2239

if(quit_now){

2175

2240

goto end;

2176

2241

}

2177

2242

2178

ret = init_gnutls_global(pubkey, seckey);

2243

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

2179

2244

if(ret == -1){

2180

2245

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

2181

2246

exitcode = EX_UNAVAILABLE;

2198

2263

goto end;

2199

2264

}

2200

2265

2201

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

2266

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

2202

2267

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

2203

2268

exitcode = EX_UNAVAILABLE;

2204

2269

goto end;

2225

2290

goto end;

2226

2291

}

2227

2292

2228

uint16_t port;

2293

in_port_t port;

2229

2294

errno = 0;

2230

2295

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

2231

2296

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

2232

or tmpmax != (uint16_t)tmpmax){

2297

or tmpmax != (in_port_t)tmpmax){

2233

2298

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

2234

2299

exitcode = EX_USAGE;

2235

2300

goto end;

2236

2301

}

2237

2302

2238

2303

if(quit_now){

2239

2304

goto end;

2240

2305

}

2241

2306

2242

port = (uint16_t)tmpmax;

2307

port = (in_port_t)tmpmax;

2243

2308

*address = '\0';

2244

2309

/* Colon in address indicates IPv6 */

2245

2310

int af;

2261

2326

}

2262

2327

2263

2328

while(not quit_now){

2264

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

2329

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

2330

&mc);

2265

2331

if(quit_now or ret == 0){

2266

2332

break;

2267

2333

}

2269

2335

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

2270

2336

(int)retry_interval);

2271

2337

}

2272

sleep((int)retry_interval);

2338

sleep((unsigned int)retry_interval);

2273

2339

}

2274

2340

2275

2341

if (not quit_now){

2293

2359

config.publish_domain = 0;

2294

2360

2295

2361

/* Allocate a new server */

2296

mc.server = avahi_server_new(avahi_simple_poll_get

2297

(mc.simple_poll), &config, NULL,

2298

NULL, &ret_errno);

2362

mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),

2363

&config, NULL, NULL, &ret_errno);

2299

2364

2300

2365

/* Free the Avahi configuration data */

2301

2366

avahi_server_config_free(&config);

2316

2381

/* Create the Avahi service browser */

2317

2382

sb = avahi_s_service_browser_new(mc.server, if_index,

2318

2383

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

2319

NULL, 0, browse_callback, NULL);

2384

NULL, 0, browse_callback,

2385

(void *)&mc);

2320

2386

if(sb == NULL){

2321

2387

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

2322

2388

avahi_strerror(avahi_server_errno(mc.server)));

2334

2400

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

2335

2401

}

2336

2402

2337

ret = avahi_loop_with_timeout(mc.simple_poll,

2338

(int)(retry_interval * 1000));

2403

ret = avahi_loop_with_timeout(simple_poll,

2404

(int)(retry_interval * 1000), &mc);

2339

2405

if(debug){

2340

2406

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

2341

2407

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

2348

2414

}

2349

2415

2350

2416

/* Cleanup things */

2417

free(mc.interfaces);

2418

2351

2419

if(sb != NULL)

2352

2420

avahi_s_service_browser_free(sb);

2353

2421

2354

2422

if(mc.server != NULL)

2355

2423

avahi_server_free(mc.server);

2356

2424

2357

if(mc.simple_poll != NULL)

2358

avahi_simple_poll_free(mc.simple_poll);

2425

if(simple_poll != NULL)

2426

avahi_simple_poll_free(simple_poll);

2359

2427

2360

2428

if(gnutls_initialized){

2361

2429

gnutls_certificate_free_credentials(mc.cred);

2383

2451

raise_privileges();

2384

2452

2385

2453

/* Run network hooks */

2386

run_network_hooks("stop", interfaces_hooks, delay);

2454

run_network_hooks("stop", interfaces_hooks != NULL ?

2455

interfaces_hooks : "", delay);

2387

2456

2388

2457

/* Take down the network interfaces which were brought up */

2389

2458

{