/mandos/release : revision 237.7.144

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;

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

663

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

664

bool match = false;

665

{

666

char *interface = NULL;

667

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

668

interface))){

669

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

670

match = true;

671

break;

672

}

673

}

674

}

675

if(not match){

676

if(debug){

677

char interface[IF_NAMESIZE];

678

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

679

perror_plus("if_indextoname");

680

} else {

681

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

682

" \"%s\"\n",

683

if_indextoname((unsigned int)if_index,

684

interface));

685

}

686

}

687

return -1;

688

}

689

}

690

691

ret = init_gnutls_session(&session, mc);

664

ret = init_gnutls_session(&session);

692

665

if(ret != 0){

693

666

return -1;

694

667

}

695

668

696

669

if(debug){

697

670

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

698

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

671

PRIu16 "\n", ip, port);

699

672

}

700

673

701

674

tcp_sd = socket(pf, SOCK_STREAM, 0);

732

705

goto mandos_end;

733

706

}

734

707

if(af == AF_INET6){

735

to.in6.sin6_port = htons(port);

708

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

709

-Wconversion and

710

-Wunreachable-code */

711

736

712

if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */

737

713

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

738

714

-Wunreachable-code*/

762

738

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

763

739

perror_plus("if_indextoname");

764

740

} else {

765

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

766

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

741

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

742

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

767

743

}

768

744

} else {

769

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

770

ip, (uintmax_t)port);

745

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

746

ip, port);

771

747

}

772

748

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

773

749

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

966

942

if(buffer_length > 0){

967

943

ssize_t decrypted_buffer_size;

968

944

decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,

969

&decrypted_buffer, mc);

945

&decrypted_buffer);

970

946

if(decrypted_buffer_size >= 0){

971

947

972

948

written = 0;

1033

1009

AVAHI_GCC_UNUSED AvahiStringList *txt,

1034

1010

AVAHI_GCC_UNUSED AvahiLookupResultFlags

1035

1011

flags,

1036

void* mc){

1037

if(r == NULL){

1038

return;

1039

}

1012

AVAHI_GCC_UNUSED void* userdata){

1013

assert(r);

1040

1014

1041

1015

/* Called whenever a service has been resolved successfully or

1042

1016

timed out */

1051

1025

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

1052

1026

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

1053

1027

domain,

1054

avahi_strerror(avahi_server_errno

1055

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

1028

avahi_strerror(avahi_server_errno(mc.server)));

1056

1029

break;

1057

1030

1058

1031

case AVAHI_RESOLVER_FOUND:

1064

1037

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

1065

1038

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

1066

1039

}

1067

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

1068

interface,

1069

avahi_proto_to_af(proto),

1070

mc);

1040

int ret = start_mandos_communication(ip, port, interface,

1041

avahi_proto_to_af(proto));

1071

1042

if(ret == 0){

1072

avahi_simple_poll_quit(simple_poll);

1043

avahi_simple_poll_quit(mc.simple_poll);

1073

1044

} else {

1074

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

1075

avahi_proto_to_af(proto),

1076

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

1045

if(not add_server(ip, port, interface,

1046

avahi_proto_to_af(proto))){

1077

1047

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

1078

1048

" list\n", name);

1079

1049

}

1092

1062

const char *domain,

1093

1063

AVAHI_GCC_UNUSED AvahiLookupResultFlags

1094

1064

flags,

1095

void* mc){

1096

if(b == NULL){

1097

return;

1098

}

1065

AVAHI_GCC_UNUSED void* userdata){

1066

assert(b);

1099

1067

1100

1068

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

1101

1069

is removed from the LAN */

1109

1077

case AVAHI_BROWSER_FAILURE:

1110

1078

1111

1079

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

1112

avahi_strerror(avahi_server_errno

1113

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

1114

avahi_simple_poll_quit(simple_poll);

1080

avahi_strerror(avahi_server_errno(mc.server)));

1081

avahi_simple_poll_quit(mc.simple_poll);

1115

1082

return;

1116

1083

1117

1084

case AVAHI_BROWSER_NEW:

1120

1087

the callback function is called the Avahi server will free the

1121

1088

resolver for us. */

1122

1089

1123

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

1124

interface, protocol, name, type,

1125

domain, protocol, 0,

1126

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)

1127

1093

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

1128

1094

" %s\n", name,

1129

avahi_strerror(avahi_server_errno

1130

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

1095

avahi_strerror(avahi_server_errno(mc.server)));

1131

1096

break;

1132

1097

1133

1098

case AVAHI_BROWSER_REMOVE:

1152

1117

signal_received = sig;

1153

1118

int old_errno = errno;

1154

1119

/* set main loop to exit */

1155

if(simple_poll != NULL){

1156

avahi_simple_poll_quit(simple_poll);

1120

if(mc.simple_poll != NULL){

1121

avahi_simple_poll_quit(mc.simple_poll);

1157

1122

}

1158

1123

errno = old_errno;

1159

1124

}

1353

1318

return 1;

1354

1319

}

1355

1320

1356

int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,

1357

mandos_context *mc){

1321

int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){

1358

1322

int ret;

1359

1323

struct timespec now;

1360

1324

struct timespec waited_time;

1361

1325

intmax_t block_time;

1362

1326

1363

1327

while(true){

1364

if(mc->current_server == NULL){

1328

if(mc.current_server == NULL){

1365

1329

if (debug){

1366

1330

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

1367

1331

" No timeout!\n");

1381

1345

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

1382

1346

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

1383

1347

waited_time.tv_sec = (now.tv_sec

1384

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

1348

- mc.current_server->last_seen.tv_sec);

1385

1349

waited_time.tv_nsec = (now.tv_nsec

1386

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

1350

- mc.current_server->last_seen.tv_nsec);

1387

1351

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

1388

1352

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

1389

1353

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

1397

1361

}

1398

1362

1399

1363

if(block_time <= 0){

1400

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

1401

mc->current_server->port,

1402

mc->current_server->if_index,

1403

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);

1404

1368

if(ret == 0){

1405

avahi_simple_poll_quit(s);

1369

avahi_simple_poll_quit(mc.simple_poll);

1406

1370

return 0;

1407

1371

}

1408

1372

ret = clock_gettime(CLOCK_MONOTONIC,

1409

&mc->current_server->last_seen);

1373

&mc.current_server->last_seen);

1410

1374

if(ret == -1){

1411

1375

perror_plus("clock_gettime");

1412

1376

return -1;

1413

1377

}

1414

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

1378

mc.current_server = mc.current_server->next;

1415

1379

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

1416

1380

servers, but don't block */

1417

1381

}

1486

1450

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

1487

1451

alphasort);

1488

1452

if(numhooks == -1){

1489

if(errno == ENOENT){

1490

if(debug){

1491

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

1492

" found\n", hookdir);

1493

}

1494

} else {

1495

perror_plus("scandir");

1496

}

1453

perror_plus("scandir");

1497

1454

} else {

1498

1455

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

1499

1456

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

1784

1741

}

1785

1742

1786

1743

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

1787

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

1788

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

1789

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

1790

.interfaces = NULL, .interfaces_size = 0 };

1791

1744

AvahiSServiceBrowser *sb = NULL;

1792

1745

error_t ret_errno;

1793

1746

int ret;

1794

1747

intmax_t tmpmax;

1795

1748

char *tmp;

1796

1749

int exitcode = EXIT_SUCCESS;

1750

char *interfaces = NULL;

1751

size_t interfaces_size = 0;

1797

1752

char *interfaces_to_take_down = NULL;

1798

1753

size_t interfaces_to_take_down_size = 0;

1799

1754

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

1899

1854

connect_to = arg;

1900

1855

break;

1901

1856

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

1902

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

1903

arg, (int)',');

1857

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

1858

(int)',');

1904

1859

if(ret_errno != 0){

1905

1860

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

1906

1861

}

2033

1988

}

2034

1989

2035

1990

/* Lower privileges */

2036

lower_privileges();

1991

errno = 0;

1992

ret = seteuid(uid);

1993

if(ret == -1){

1994

perror_plus("seteuid");

1995

}

2037

1996

}

2038

1997

}

2039

1998

2040

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

1999

/* Remove empty interface names */

2041

2000

{

2042

2001

char *interface = NULL;

2043

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

2002

while((interface = argz_next(interfaces, interfaces_size,

2044

2003

interface))){

2045

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

2046

and if_nametoindex(interface) == 0){

2047

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

2004

if(if_nametoindex(interface) == 0){

2005

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

2048

2006

fprintf_plus(stderr, "Not using nonexisting interface"

2049

2007

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

2050

2008

}

2051

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

2009

argz_delete(&interfaces, &interfaces_size, interface);

2052

2010

interface = NULL;

2053

2011

}

2054

2012

}

2056

2014

2057

2015

/* Run network hooks */

2058

2016

{

2059

if(mc.interfaces != NULL){

2060

interfaces_hooks = malloc(mc.interfaces_size);

2061

if(interfaces_hooks == NULL){

2062

perror_plus("malloc");

2063

goto end;

2064

}

2065

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

2066

interfaces_hooks_size = mc.interfaces_size;

2067

argz_stringify(interfaces_hooks, interfaces_hooks_size,

2068

(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;

2069

2023

}

2070

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

2071

interfaces_hooks : "", delay)){

2024

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

2025

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

2072

2026

goto end;

2073

2027

}

2074

2028

}

2081

2035

from the signal handler */

2082

2036

/* Initialize the pseudo-RNG for Avahi */

2083

2037

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

2084

simple_poll = avahi_simple_poll_new();

2085

if(simple_poll == NULL){

2038

mc.simple_poll = avahi_simple_poll_new();

2039

if(mc.simple_poll == NULL){

2086

2040

fprintf_plus(stderr,

2087

2041

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

2088

2042

exitcode = EX_UNAVAILABLE;

2153

2107

}

2154

2108

2155

2109

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

2156

if(mc.interfaces == NULL){

2110

if(interfaces == NULL){

2157

2111

struct dirent **direntries;

2158

2112

/* Look for any good interfaces */

2159

2113

ret = scandir(sys_class_net, &direntries, good_interface,

2161

2115

if(ret >= 1){

2162

2116

/* Add all found interfaces to interfaces list */

2163

2117

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

2164

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

2118

ret_errno = argz_add(&interfaces, &interfaces_size,

2165

2119

direntries[i]->d_name);

2166

2120

if(ret_errno != 0){

2167

2121

perror_plus("argz_add");

2181

2135

}

2182

2136

}

2183

2137

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

2184

2147

/* Bring up interfaces which are down */

2185

{

2148

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

2149

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

2186

2150

char *interface = NULL;

2187

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

2151

while((interface = argz_next(interfaces, interfaces_size,

2188

2152

interface))){

2189

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

2190

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

2191

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

2192

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

2193

interface);

2194

interface = NULL;

2195

while((interface = argz_next(mc.interfaces,

2196

mc.interfaces_size, interface))){

2197

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

2198

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

2199

interface);

2200

interface = NULL;

2201

}

2202

}

2203

break;

2204

}

2205

2153

bool interface_was_up = interface_is_up(interface);

2206

2154

ret = bring_up_interface(interface, delay);

2207

2155

if(not interface_was_up){

2215

2163

}

2216

2164

}

2217

2165

}

2166

free(interfaces);

2167

interfaces = NULL;

2168

interfaces_size = 0;

2218

2169

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

2219

2170

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

2220

2171

}

2221

2172

}

2222

2173

2223

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

2224

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

2225

if(debug){

2226

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

2227

mc.interfaces);

2228

}

2229

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

2230

}

2231

2232

2174

if(quit_now){

2233

2175

goto end;

2234

2176

}

2235

2177

2236

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

2178

ret = init_gnutls_global(pubkey, seckey);

2237

2179

if(ret == -1){

2238

2180

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

2239

2181

exitcode = EX_UNAVAILABLE;

2256

2198

goto end;

2257

2199

}

2258

2200

2259

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

2201

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

2260

2202

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

2261

2203

exitcode = EX_UNAVAILABLE;

2262

2204

goto end;

2283

2225

goto end;

2284

2226

}

2285

2227

2286

in_port_t port;

2228

uint16_t port;

2287

2229

errno = 0;

2288

2230

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

2289

2231

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

2290

or tmpmax != (in_port_t)tmpmax){

2232

or tmpmax != (uint16_t)tmpmax){

2291

2233

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

2292

2234

exitcode = EX_USAGE;

2293

2235

goto end;

2294

2236

}

2295

2237

2296

2238

if(quit_now){

2297

2239

goto end;

2298

2240

}

2299

2241

2300

port = (in_port_t)tmpmax;

2242

port = (uint16_t)tmpmax;

2301

2243

*address = '\0';

2302

2244

/* Colon in address indicates IPv6 */

2303

2245

int af;

2319

2261

}

2320

2262

2321

2263

while(not quit_now){

2322

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

2323

&mc);

2264

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

2324

2265

if(quit_now or ret == 0){

2325

2266

break;

2326

2267

}

2352

2293

config.publish_domain = 0;

2353

2294

2354

2295

/* Allocate a new server */

2355

mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),

2356

&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);

2357

2299

2358

2300

/* Free the Avahi configuration data */

2359

2301

avahi_server_config_free(&config);

2374

2316

/* Create the Avahi service browser */

2375

2317

sb = avahi_s_service_browser_new(mc.server, if_index,

2376

2318

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

2377

NULL, 0, browse_callback,

2378

(void *)&mc);

2319

NULL, 0, browse_callback, NULL);

2379

2320

if(sb == NULL){

2380

2321

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

2381

2322

avahi_strerror(avahi_server_errno(mc.server)));

2393

2334

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

2394

2335

}

2395

2336

2396

ret = avahi_loop_with_timeout(simple_poll,

2397

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

2337

ret = avahi_loop_with_timeout(mc.simple_poll,

2338

(int)(retry_interval * 1000));

2398

2339

if(debug){

2399

2340

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

2400

2341

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

2407

2348

}

2408

2349

2409

2350

/* Cleanup things */

2410

free(mc.interfaces);

2411

2412

2351

if(sb != NULL)

2413

2352

avahi_s_service_browser_free(sb);

2414

2353

2415

2354

if(mc.server != NULL)

2416

2355

avahi_server_free(mc.server);

2417

2356

2418

if(simple_poll != NULL)

2419

avahi_simple_poll_free(simple_poll);

2357

if(mc.simple_poll != NULL)

2358

avahi_simple_poll_free(mc.simple_poll);

2420

2359

2421

2360

if(gnutls_initialized){

2422

2361

gnutls_certificate_free_credentials(mc.cred);

2444

2383

raise_privileges();

2445

2384

2446

2385

/* Run network hooks */

2447

run_network_hooks("stop", interfaces_hooks != NULL ?

2448

interfaces_hooks : "", delay);

2386

run_network_hooks("stop", interfaces_hooks, delay);

2449

2387

2450

2388

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

2451

2389

{