/mandos/trunk : revision 596

61

*/

62

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

63

strtoimax() */

64

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

64

65

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

65

66

program_invocation_short_name */

66

67

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

144

145

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

145

146

typedef struct server{

146

147

const char *ip;

147

in_port_t port;

148

uint16_t port;

148

149

AvahiIfIndex if_index;

149

150

int af;

150

151

struct timespec last_seen;

154

155

156

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

156

157

typedef struct {

158

AvahiSimplePoll *simple_poll;

157

159

AvahiServer *server;

158

160

gnutls_certificate_credentials_t cred;

159

161

unsigned int dh_bits;

161

163

const char *priority;

162

164

gpgme_ctx_t ctx;

163

165

server *current_server;

164

char *interfaces;

165

size_t interfaces_size;

166

} mandos_context;

167

168

/* global so signal handler can reach it*/

169

AvahiSimplePoll *simple_poll;

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",

172

.current_server = NULL };

170

173

171

174

sig_atomic_t quit_now = 0;

172

175

int signal_received = 0;

187

190

188

191

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

189

192

program_invocation_short_name));

190

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

193

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

191

194

}

192

195

193

196

/*

208

211

}

209

212

210

213

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

211

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

212

int af, server **current_server){

214

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

215

int af){

213

216

int ret;

214

217

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

215

218

if(new_server == NULL){

225

228

return false;

226

229

}

227

230

/* Special case of first server */

228

if(*current_server == NULL){

231

if (mc.current_server == NULL){

229

232

new_server->next = new_server;

230

233

new_server->prev = new_server;

231

*current_server = new_server;

234

mc.current_server = new_server;

232

235

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

233

236

} else {

234

new_server->next = *current_server;

235

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

237

new_server->next = mc.current_server;

238

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

236

239

new_server->prev->next = new_server;

237

(*current_server)->prev = new_server;

240

mc.current_server->prev = new_server;

238

241

}

239

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

242

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

240

243

if(ret == -1){

241

244

perror_plus("clock_gettime");

242

245

return false;

248

251

* Initialize GPGME.

249

252

*/

250

253

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

251

const char *tempdir, mandos_context *mc){

254

const char *tempdir){

252

255

gpgme_error_t rc;

253

256

gpgme_engine_info_t engine_info;

254

257

258

255

259

/*

256

260

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

257

261

*/

273

277

return false;

274

278

}

275

279

276

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

280

rc = gpgme_op_import(mc.ctx, pgp_data);

277

281

if(rc != GPG_ERR_NO_ERROR){

278

282

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

279

283

gpgme_strsource(rc), gpgme_strerror(rc));

323

327

}

324

328

325

329

/* Create new GPGME "context" */

326

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

330

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

327

331

if(rc != GPG_ERR_NO_ERROR){

328

332

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

329

333

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

344

348

*/

345

349

static ssize_t pgp_packet_decrypt(const char *cryptotext,

346

350

size_t crypto_size,

347

char **plaintext,

348

mandos_context *mc){

351

char **plaintext){

349

352

gpgme_data_t dh_crypto, dh_plain;

350

353

gpgme_error_t rc;

351

354

ssize_t ret;

377

380

378

381

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

379

382

data buffer */

380

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

383

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

381

384

if(rc != GPG_ERR_NO_ERROR){

382

385

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

383

386

gpgme_strsource(rc), gpgme_strerror(rc));

384

387

plaintext_length = -1;

385

388

if(debug){

386

389

gpgme_decrypt_result_t result;

387

result = gpgme_op_decrypt_result(mc->ctx);

390

result = gpgme_op_decrypt_result(mc.ctx);

388

391

if(result == NULL){

389

392

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

390

393

} else {

468

471

}

469

472

470

473

static const char * safer_gnutls_strerror(int value){

471

const char *ret = gnutls_strerror(value);

474

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

475

-Wunreachable-code */

472

476

if(ret == NULL)

473

477

ret = "(unknown)";

474

478

return ret;

481

485

}

482

486

483

487

static int init_gnutls_global(const char *pubkeyfilename,

484

const char *seckeyfilename,

485

mandos_context *mc){

488

const char *seckeyfilename){

486

489

int ret;

487

490

488

491

if(debug){

505

508

}

506

509

507

510

/* OpenPGP credentials */

508

ret = gnutls_certificate_allocate_credentials(&mc->cred);

511

ret = gnutls_certificate_allocate_credentials(&mc.cred);

509

512

if(ret != GNUTLS_E_SUCCESS){

510

513

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

511

514

safer_gnutls_strerror(ret));

521

524

}

522

525

523

526

ret = gnutls_certificate_set_openpgp_key_file

524

(mc->cred, pubkeyfilename, seckeyfilename,

527

(mc.cred, pubkeyfilename, seckeyfilename,

525

528

GNUTLS_OPENPGP_FMT_BASE64);

526

529

if(ret != GNUTLS_E_SUCCESS){

527

530

fprintf_plus(stderr,

533

536

}

534

537

535

538

/* GnuTLS server initialization */

536

ret = gnutls_dh_params_init(&mc->dh_params);

539

ret = gnutls_dh_params_init(&mc.dh_params);

537

540

if(ret != GNUTLS_E_SUCCESS){

538

541

fprintf_plus(stderr, "Error in GnuTLS DH parameter"

539

542

" initialization: %s\n",

540

543

safer_gnutls_strerror(ret));

541

544

goto globalfail;

542

545

}

543

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

546

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

544

547

if(ret != GNUTLS_E_SUCCESS){

545

548

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

546

549

safer_gnutls_strerror(ret));

547

550

goto globalfail;

548

551

}

549

552

550

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

553

gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);

551

554

552

555

return 0;

553

556

554

557

globalfail:

555

558

556

gnutls_certificate_free_credentials(mc->cred);

559

gnutls_certificate_free_credentials(mc.cred);

557

560

gnutls_global_deinit();

558

gnutls_dh_params_deinit(mc->dh_params);

561

gnutls_dh_params_deinit(mc.dh_params);

559

562

return -1;

560

563

}

561

564

562

static int init_gnutls_session(gnutls_session_t *session,

563

mandos_context *mc){

565

static int init_gnutls_session(gnutls_session_t *session){

564

566

int ret;

565

567

/* GnuTLS session creation */

566

568

do {

578

580

{

579

581

const char *err;

580

582

do {

581

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

583

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

582

584

if(quit_now){

583

585

gnutls_deinit(*session);

584

586

return -1;

595

597

596

598

do {

597

599

ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,

598

mc->cred);

600

mc.cred);

599

601

if(quit_now){

600

602

gnutls_deinit(*session);

601

603

return -1;

611

613

/* ignore client certificate if any. */

612

614

gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);

613

615

614

gnutls_dh_set_prime_bits(*session, mc->dh_bits);

616

gnutls_dh_set_prime_bits(*session, mc.dh_bits);

615

617

616

618

return 0;

617

619

}

621

623

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

622

624

623

625

/* Called when a Mandos server is found */

624

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

626

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

625

627

AvahiIfIndex if_index,

626

int af, mandos_context *mc){

628

int af){

627

629

int ret, tcp_sd = -1;

628

630

ssize_t sret;

629

631

union {

659

661

return -1;

660

662

}

661

663

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);

664

ret = init_gnutls_session(&session);

695

665

if(ret != 0){

696

666

return -1;

697

667

}

698

668

699

669

if(debug){

700

670

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

701

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

671

PRIu16 "\n", ip, port);

702

672

}

703

673

704

674

tcp_sd = socket(pf, SOCK_STREAM, 0);

735

705

goto mandos_end;

736

706

}

737

707

if(af == AF_INET6){

738

to.in6.sin6_port = htons(port);

708

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

709

-Wconversion and

710

-Wunreachable-code */

711

739

712

if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */

740

713

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

741

714

-Wunreachable-code*/

765

738

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

766

739

perror_plus("if_indextoname");

767

740

} else {

768

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

769

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

741

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

742

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

770

743

}

771

744

} else {

772

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

773

ip, (uintmax_t)port);

745

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

746

ip, port);

774

747

}

775

748

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

776

749

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

969

942

if(buffer_length > 0){

970

943

ssize_t decrypted_buffer_size;

971

944

decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,

972

&decrypted_buffer, mc);

945

&decrypted_buffer);

973

946

if(decrypted_buffer_size >= 0){

974

947

975

948

written = 0;

1036

1009

AVAHI_GCC_UNUSED AvahiStringList *txt,

1037

1010

AVAHI_GCC_UNUSED AvahiLookupResultFlags

1038

1011

flags,

1039

void* mc){

1040

if(r == NULL){

1041

return;

1042

}

1012

AVAHI_GCC_UNUSED void* userdata){

1013

assert(r);

1043

1014

1044

1015

/* Called whenever a service has been resolved successfully or

1045

1016

timed out */

1054

1025

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

1055

1026

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

1056

1027

domain,

1057

avahi_strerror(avahi_server_errno

1058

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

1028

avahi_strerror(avahi_server_errno(mc.server)));

1059

1029

break;

1060

1030

1061

1031

case AVAHI_RESOLVER_FOUND:

1067

1037

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

1068

1038

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

1069

1039

}

1070

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

1071

interface,

1072

avahi_proto_to_af(proto),

1073

mc);

1040

int ret = start_mandos_communication(ip, port, interface,

1041

avahi_proto_to_af(proto));

1074

1042

if(ret == 0){

1075

avahi_simple_poll_quit(simple_poll);

1043

avahi_simple_poll_quit(mc.simple_poll);

1076

1044

} else {

1077

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

1078

avahi_proto_to_af(proto),

1079

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

1045

if(not add_server(ip, port, interface,

1046

avahi_proto_to_af(proto))){

1080

1047

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

1081

1048

" list\n", name);

1082

1049

}

1095

1062

const char *domain,

1096

1063

AVAHI_GCC_UNUSED AvahiLookupResultFlags

1097

1064

flags,

1098

void* mc){

1099

if(b == NULL){

1100

return;

1101

}

1065

AVAHI_GCC_UNUSED void* userdata){

1066

assert(b);

1102

1067

1103

1068

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

1104

1069

is removed from the LAN */

1112

1077

case AVAHI_BROWSER_FAILURE:

1113

1078

1114

1079

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

1115

avahi_strerror(avahi_server_errno

1116

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

1117

avahi_simple_poll_quit(simple_poll);

1080

avahi_strerror(avahi_server_errno(mc.server)));

1081

avahi_simple_poll_quit(mc.simple_poll);

1118

1082

return;

1119

1083

1120

1084

case AVAHI_BROWSER_NEW:

1123

1087

the callback function is called the Avahi server will free the

1124

1088

resolver for us. */

1125

1089

1126

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

1127

interface, protocol, name, type,

1128

domain, protocol, 0,

1129

resolve_callback, mc) == NULL)

1090

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

1091

name, type, domain, protocol, 0,

1092

resolve_callback, NULL) == NULL)

1130

1093

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

1131

1094

" %s\n", name,

1132

avahi_strerror(avahi_server_errno

1133

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

1095

avahi_strerror(avahi_server_errno(mc.server)));

1134

1096

break;

1135

1097

1136

1098

case AVAHI_BROWSER_REMOVE:

1155

1117

signal_received = sig;

1156

1118

int old_errno = errno;

1157

1119

/* set main loop to exit */

1158

if(simple_poll != NULL){

1159

avahi_simple_poll_quit(simple_poll);

1120

if(mc.simple_poll != NULL){

1121

avahi_simple_poll_quit(mc.simple_poll);

1160

1122

}

1161

1123

errno = old_errno;

1162

1124

}

1356

1318

return 1;

1357

1319

}

1358

1320

1359

int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,

1360

mandos_context *mc){

1321

int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){

1361

1322

int ret;

1362

1323

struct timespec now;

1363

1324

struct timespec waited_time;

1364

1325

intmax_t block_time;

1365

1326

1366

1327

while(true){

1367

if(mc->current_server == NULL){

1328

if(mc.current_server == NULL){

1368

1329

if (debug){

1369

1330

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

1370

1331

" No timeout!\n");

1384

1345

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

1385

1346

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

1386

1347

waited_time.tv_sec = (now.tv_sec

1387

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

1348

- mc.current_server->last_seen.tv_sec);

1388

1349

waited_time.tv_nsec = (now.tv_nsec

1389

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

1350

- mc.current_server->last_seen.tv_nsec);

1390

1351

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

1391

1352

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

1392

1353

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

1400

1361

}

1401

1362

1402

1363

if(block_time <= 0){

1403

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

1404

mc->current_server->port,

1405

mc->current_server->if_index,

1406

mc->current_server->af, mc);

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

1368

if(ret == 0){

1408

avahi_simple_poll_quit(s);

1369

avahi_simple_poll_quit(mc.simple_poll);

1409

1370

return 0;

1410

1371

}

1411

1372

ret = clock_gettime(CLOCK_MONOTONIC,

1412

&mc->current_server->last_seen);

1373

&mc.current_server->last_seen);

1413

1374

if(ret == -1){

1414

1375

perror_plus("clock_gettime");

1415

1376

return -1;

1416

1377

}

1417

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

1378

mc.current_server = mc.current_server->next;

1418

1379

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

1419

1380

servers, but don't block */

1420

1381

}

1489

1450

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

1490

1451

alphasort);

1491

1452

if(numhooks == -1){

1492

if(errno == ENOENT){

1493

if(debug){

1494

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

1495

" found\n", hookdir);

1496

}

1497

} else {

1498

perror_plus("scandir");

1499

}

1453

perror_plus("scandir");

1500

1454

} else {

1501

1455

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

1502

1456

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

1787

1741

}

1788

1742

1789

1743

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

1790

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

1791

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

1792

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

1793

.interfaces = NULL, .interfaces_size = 0 };

1794

1744

AvahiSServiceBrowser *sb = NULL;

1795

1745

error_t ret_errno;

1796

1746

int ret;

1797

1747

intmax_t tmpmax;

1798

1748

char *tmp;

1799

1749

int exitcode = EXIT_SUCCESS;

1750

char *interfaces = NULL;

1751

size_t interfaces_size = 0;

1800

1752

char *interfaces_to_take_down = NULL;

1801

1753

size_t interfaces_to_take_down_size = 0;

1802

1754

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

1902

1854

connect_to = arg;

1903

1855

break;

1904

1856

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

1905

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

1906

arg, (int)',');

1857

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

1858

(int)',');

1907

1859

if(ret_errno != 0){

1908

1860

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

1909

1861

}

2036

1988

}

2037

1989

2038

1990

/* Lower privileges */

2039

lower_privileges();

1991

errno = 0;

1992

ret = seteuid(uid);

1993

if(ret == -1){

1994

perror_plus("seteuid");

1995

}

2040

1996

}

2041

1997

}

2042

1998

2043

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

1999

/* Remove empty interface names */

2044

2000

{

2045

2001

char *interface = NULL;

2046

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

2002

while((interface = argz_next(interfaces, interfaces_size,

2047

2003

interface))){

2048

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

2049

and if_nametoindex(interface) == 0){

2050

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

2004

if(if_nametoindex(interface) == 0){

2005

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

2051

2006

fprintf_plus(stderr, "Not using nonexisting interface"

2052

2007

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

2053

2008

}

2054

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

2009

argz_delete(&interfaces, &interfaces_size, interface);

2055

2010

interface = NULL;

2056

2011

}

2057

2012

}

2059

2014

2060

2015

/* Run network hooks */

2061

2016

{

2062

if(mc.interfaces != NULL){

2063

interfaces_hooks = malloc(mc.interfaces_size);

2064

if(interfaces_hooks == NULL){

2065

perror_plus("malloc");

2066

goto end;

2067

}

2068

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

2069

interfaces_hooks_size = mc.interfaces_size;

2070

argz_stringify(interfaces_hooks, interfaces_hooks_size,

2071

(int)',');

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;

2072

2023

}

2073

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

2074

interfaces_hooks : "", delay)){

2024

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

2025

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

2075

2026

goto end;

2076

2027

}

2077

2028

}

2084

2035

from the signal handler */

2085

2036

/* Initialize the pseudo-RNG for Avahi */

2086

2037

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

2087

simple_poll = avahi_simple_poll_new();

2088

if(simple_poll == NULL){

2038

mc.simple_poll = avahi_simple_poll_new();

2039

if(mc.simple_poll == NULL){

2089

2040

fprintf_plus(stderr,

2090

2041

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

2091

2042

exitcode = EX_UNAVAILABLE;

2156

2107

}

2157

2108

2158

2109

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

2159

if(mc.interfaces == NULL){

2110

if(interfaces == NULL){

2160

2111

struct dirent **direntries;

2161

2112

/* Look for any good interfaces */

2162

2113

ret = scandir(sys_class_net, &direntries, good_interface,

2164

2115

if(ret >= 1){

2165

2116

/* Add all found interfaces to interfaces list */

2166

2117

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

2167

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

2118

ret_errno = argz_add(&interfaces, &interfaces_size,

2168

2119

direntries[i]->d_name);

2169

2120

if(ret_errno != 0){

2170

2121

perror_plus("argz_add");

2184

2135

}

2185

2136

}

2186

2137

2187

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

2188

{

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)){

2189

2150

char *interface = NULL;

2190

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

2151

while((interface = argz_next(interfaces, interfaces_size,

2191

2152

interface))){

2192

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

2193

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

2194

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

2195

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

2196

interface);

2197

interface = NULL;

2198

while((interface = argz_next(mc.interfaces,

2199

mc.interfaces_size, interface))){

2200

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

2201

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

2202

interface);

2203

interface = NULL;

2204

}

2205

}

2206

break;

2207

}

2208

2153

bool interface_was_up = interface_is_up(interface);

2209

2154

ret = bring_up_interface(interface, delay);

2210

2155

if(not interface_was_up){

2218

2163

}

2219

2164

}

2220

2165

}

2166

free(interfaces);

2167

interfaces = NULL;

2168

interfaces_size = 0;

2221

2169

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

2222

2170

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

2223

2171

}

2224

2172

}

2225

2173

2226

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

2227

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

2228

if(debug){

2229

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

2230

mc.interfaces);

2231

}

2232

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

2233

}

2234

2235

2174

if(quit_now){

2236

2175

goto end;

2237

2176

}

2238

2177

2239

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

2178

ret = init_gnutls_global(pubkey, seckey);

2240

2179

if(ret == -1){

2241

2180

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

2242

2181

exitcode = EX_UNAVAILABLE;

2259

2198

goto end;

2260

2199

}

2261

2200

2262

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

2201

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

2263

2202

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

2264

2203

exitcode = EX_UNAVAILABLE;

2265

2204

goto end;

2286

2225

goto end;

2287

2226

}

2288

2227

2289

in_port_t port;

2228

uint16_t port;

2290

2229

errno = 0;

2291

2230

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

2292

2231

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

2293

or tmpmax != (in_port_t)tmpmax){

2232

or tmpmax != (uint16_t)tmpmax){

2294

2233

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

2295

2234

exitcode = EX_USAGE;

2296

2235

goto end;

2297

2236

}

2298

2237

2299

2238

if(quit_now){

2300

2239

goto end;

2301

2240

}

2302

2241

2303

port = (in_port_t)tmpmax;

2242

port = (uint16_t)tmpmax;

2304

2243

*address = '\0';

2305

2244

/* Colon in address indicates IPv6 */

2306

2245

int af;

2322

2261

}

2323

2262

2324

2263

while(not quit_now){

2325

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

2326

&mc);

2264

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

2327

2265

if(quit_now or ret == 0){

2328

2266

break;

2329

2267

}

2331

2269

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

2332

2270

(int)retry_interval);

2333

2271

}

2334

sleep((unsigned int)retry_interval);

2272

sleep((int)retry_interval);

2335

2273

}

2336

2274

2337

2275

if (not quit_now){

2355

2293

config.publish_domain = 0;

2356

2294

2357

2295

/* Allocate a new server */

2358

mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),

2359

&config, NULL, NULL, &ret_errno);

2296

mc.server = avahi_server_new(avahi_simple_poll_get

2297

(mc.simple_poll), &config, NULL,

2298

NULL, &ret_errno);

2360

2299

2361

2300

/* Free the Avahi configuration data */

2362

2301

avahi_server_config_free(&config);

2377

2316

/* Create the Avahi service browser */

2378

2317

sb = avahi_s_service_browser_new(mc.server, if_index,

2379

2318

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

2380

NULL, 0, browse_callback,

2381

(void *)&mc);

2319

NULL, 0, browse_callback, NULL);

2382

2320

if(sb == NULL){

2383

2321

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

2384

2322

avahi_strerror(avahi_server_errno(mc.server)));

2396

2334

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

2397

2335

}

2398

2336

2399

ret = avahi_loop_with_timeout(simple_poll,

2400

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

2337

ret = avahi_loop_with_timeout(mc.simple_poll,

2338

(int)(retry_interval * 1000));

2401

2339

if(debug){

2402

2340

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

2403

2341

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

2410

2348

}

2411

2349

2412

2350

/* Cleanup things */

2413

free(mc.interfaces);

2414

2415

2351

if(sb != NULL)

2416

2352

avahi_s_service_browser_free(sb);

2417

2353

2418

2354

if(mc.server != NULL)

2419

2355

avahi_server_free(mc.server);

2420

2356

2421

if(simple_poll != NULL)

2422

avahi_simple_poll_free(simple_poll);

2357

if(mc.simple_poll != NULL)

2358

avahi_simple_poll_free(mc.simple_poll);

2423

2359

2424

2360

if(gnutls_initialized){

2425

2361

gnutls_certificate_free_credentials(mc.cred);

2447

2383

raise_privileges();

2448

2384

2449

2385

/* Run network hooks */

2450

run_network_hooks("stop", interfaces_hooks != NULL ?

2451

interfaces_hooks : "", delay);

2386

run_network_hooks("stop", interfaces_hooks, delay);

2452

2387

2453

2388

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

2454

2389

{