/mandos/release : revision 237.7.152

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

156

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",

172

.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;

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

227

/* 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(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);

665

692

if(ret != 0){

666

693

return -1;

667

694

}

668

695

669

696

if(debug){

670

697

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

671

PRIu16 "\n", ip, port);

698

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

672

699

}

673

700

674

701

tcp_sd = socket(pf, SOCK_STREAM, 0);

705

732

goto mandos_end;

706

733

}

707

734

if(af == AF_INET6){

708

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

709

-Wconversion and

710

-Wunreachable-code */

711

735

to.in6.sin6_port = htons(port);

712

736

if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */

713

737

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

714

738

-Wunreachable-code*/

738

762

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

739

763

perror_plus("if_indextoname");

740

764

} else {

741

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

742

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

765

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

766

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

743

767

}

744

768

} else {

745

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

746

ip, port);

769

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

770

ip, (uintmax_t)port);

747

771

}

748

772

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

749

773

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

942

966

if(buffer_length > 0){

943

967

ssize_t decrypted_buffer_size;

944

968

decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,

945

&decrypted_buffer);

969

&decrypted_buffer, mc);

946

970

if(decrypted_buffer_size >= 0){

947

971

948

972

written = 0;

1009

1033

AVAHI_GCC_UNUSED AvahiStringList *txt,

1010

1034

AVAHI_GCC_UNUSED AvahiLookupResultFlags

1011

1035

flags,

1012

AVAHI_GCC_UNUSED void* userdata){

1013

assert(r);

1036

void* mc){

1037

if(r == NULL){

1038

return;

1039

}

1014

1040

1015

1041

/* Called whenever a service has been resolved successfully or

1016

1042

timed out */

1025

1051

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

1026

1052

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

1027

1053

domain,

1028

avahi_strerror(avahi_server_errno(mc.server)));

1054

avahi_strerror(avahi_server_errno

1055

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

1029

1056

break;

1030

1057

1031

1058

case AVAHI_RESOLVER_FOUND:

1037

1064

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

1038

1065

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

1039

1066

}

1040

int ret = start_mandos_communication(ip, port, interface,

1041

avahi_proto_to_af(proto));

1067

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

1068

interface,

1069

avahi_proto_to_af(proto),

1070

mc);

1042

1071

if(ret == 0){

1043

avahi_simple_poll_quit(mc.simple_poll);

1072

avahi_simple_poll_quit(simple_poll);

1044

1073

} else {

1045

if(not add_server(ip, port, interface,

1046

avahi_proto_to_af(proto))){

1074

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

1075

avahi_proto_to_af(proto),

1076

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

1047

1077

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

1048

1078

" list\n", name);

1049

1079

}

1062

1092

const char *domain,

1063

1093

AVAHI_GCC_UNUSED AvahiLookupResultFlags

1064

1094

flags,

1065

AVAHI_GCC_UNUSED void* userdata){

1066

assert(b);

1095

void* mc){

1096

if(b == NULL){

1097

return;

1098

}

1067

1099

1068

1100

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

1069

1101

is removed from the LAN */

1077

1109

case AVAHI_BROWSER_FAILURE:

1078

1110

1079

1111

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

1080

avahi_strerror(avahi_server_errno(mc.server)));

1081

avahi_simple_poll_quit(mc.simple_poll);

1112

avahi_strerror(avahi_server_errno

1113

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

1114

avahi_simple_poll_quit(simple_poll);

1082

1115

return;

1083

1116

1084

1117

case AVAHI_BROWSER_NEW:

1087

1120

the callback function is called the Avahi server will free the

1088

1121

resolver for us. */

1089

1122

1090

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

1091

name, type, domain, protocol, 0,

1092

resolve_callback, NULL) == NULL)

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)

1093

1127

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

1094

1128

" %s\n", name,

1095

avahi_strerror(avahi_server_errno(mc.server)));

1129

avahi_strerror(avahi_server_errno

1130

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

1096

1131

break;

1097

1132

1098

1133

case AVAHI_BROWSER_REMOVE:

1117

1152

signal_received = sig;

1118

1153

int old_errno = errno;

1119

1154

/* set main loop to exit */

1120

if(mc.simple_poll != NULL){

1121

avahi_simple_poll_quit(mc.simple_poll);

1155

if(simple_poll != NULL){

1156

avahi_simple_poll_quit(simple_poll);

1122

1157

}

1123

1158

errno = old_errno;

1124

1159

}

1318

1353

return 1;

1319

1354

}

1320

1355

1321

int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){

1356

int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,

1357

mandos_context *mc){

1322

1358

int ret;

1323

1359

struct timespec now;

1324

1360

struct timespec waited_time;

1325

1361

intmax_t block_time;

1326

1362

1327

1363

while(true){

1328

if(mc.current_server == NULL){

1364

if(mc->current_server == NULL){

1329

1365

if (debug){

1330

1366

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

1331

1367

" No timeout!\n");

1345

1381

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

1346

1382

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

1347

1383

waited_time.tv_sec = (now.tv_sec

1348

- mc.current_server->last_seen.tv_sec);

1384

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

1349

1385

waited_time.tv_nsec = (now.tv_nsec

1350

- mc.current_server->last_seen.tv_nsec);

1386

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

1351

1387

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

1352

1388

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

1353

1389

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

1361

1397

}

1362

1398

1363

1399

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);

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);

1368

1404

if(ret == 0){

1369

avahi_simple_poll_quit(mc.simple_poll);

1405

avahi_simple_poll_quit(s);

1370

1406

return 0;

1371

1407

}

1372

1408

ret = clock_gettime(CLOCK_MONOTONIC,

1373

&mc.current_server->last_seen);

1409

&mc->current_server->last_seen);

1374

1410

if(ret == -1){

1375

1411

perror_plus("clock_gettime");

1376

1412

return -1;

1377

1413

}

1378

mc.current_server = mc.current_server->next;

1414

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

1379

1415

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

1380

1416

servers, but don't block */

1381

1417

}

1450

1486

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

1451

1487

alphasort);

1452

1488

if(numhooks == -1){

1453

perror_plus("scandir");

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

}

1454

1497

} else {

1455

1498

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

1456

1499

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

1741

1784

}

1742

1785

1743

1786

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 };

1744

1791

AvahiSServiceBrowser *sb = NULL;

1745

1792

error_t ret_errno;

1746

1793

int ret;

1747

1794

intmax_t tmpmax;

1748

1795

char *tmp;

1749

1796

int exitcode = EXIT_SUCCESS;

1750

char *interfaces = NULL;

1751

size_t interfaces_size = 0;

1752

1797

char *interfaces_to_take_down = NULL;

1753

1798

size_t interfaces_to_take_down_size = 0;

1754

1799

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

1854

1899

connect_to = arg;

1855

1900

break;

1856

1901

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

1857

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

1858

(int)',');

1902

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

1903

arg, (int)',');

1859

1904

if(ret_errno != 0){

1860

1905

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

1861

1906

}

1988

2033

}

1989

2034

1990

2035

/* Lower privileges */

1991

errno = 0;

1992

ret = seteuid(uid);

1993

if(ret == -1){

1994

perror_plus("seteuid");

1995

}

2036

lower_privileges();

1996

2037

}

1997

2038

}

1998

2039

1999

/* Remove empty interface names */

2040

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

2000

2041

{

2001

2042

char *interface = NULL;

2002

while((interface = argz_next(interfaces, interfaces_size,

2043

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

2003

2044

interface))){

2004

if(if_nametoindex(interface) == 0){

2005

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

2045

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

2046

and if_nametoindex(interface) == 0){

2047

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

2006

2048

fprintf_plus(stderr, "Not using nonexisting interface"

2007

2049

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

2008

2050

}

2009

argz_delete(&interfaces, &interfaces_size, interface);

2051

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

2010

2052

interface = NULL;

2011

2053

}

2012

2054

}

2014

2056

2015

2057

/* Run network hooks */

2016

2058

{

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;

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)',');

2023

2069

}

2024

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

2025

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

2070

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

2071

interfaces_hooks : "", delay)){

2026

2072

goto end;

2027

2073

}

2028

2074

}

2035

2081

from the signal handler */

2036

2082

/* Initialize the pseudo-RNG for Avahi */

2037

2083

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

2038

mc.simple_poll = avahi_simple_poll_new();

2039

if(mc.simple_poll == NULL){

2084

simple_poll = avahi_simple_poll_new();

2085

if(simple_poll == NULL){

2040

2086

fprintf_plus(stderr,

2041

2087

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

2042

2088

exitcode = EX_UNAVAILABLE;

2107

2153

}

2108

2154

2109

2155

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

2110

if(interfaces == NULL){

2156

if(mc.interfaces == NULL){

2111

2157

struct dirent **direntries;

2112

2158

/* Look for any good interfaces */

2113

2159

ret = scandir(sys_class_net, &direntries, good_interface,

2115

2161

if(ret >= 1){

2116

2162

/* Add all found interfaces to interfaces list */

2117

2163

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

2118

ret_errno = argz_add(&interfaces, &interfaces_size,

2164

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

2119

2165

direntries[i]->d_name);

2120

2166

if(ret_errno != 0){

2121

2167

perror_plus("argz_add");

2135

2181

}

2136

2182

}

2137

2183

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

2184

/* Bring up interfaces which are down */

2148

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

2149

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

2185

{

2150

2186

char *interface = NULL;

2151

while((interface = argz_next(interfaces, interfaces_size,

2187

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

2152

2188

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

}

2153

2205

bool interface_was_up = interface_is_up(interface);

2154

2206

ret = bring_up_interface(interface, delay);

2155

2207

if(not interface_was_up){

2163

2215

}

2164

2216

}

2165

2217

}

2166

free(interfaces);

2167

interfaces = NULL;

2168

interfaces_size = 0;

2169

2218

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

2170

2219

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

2171

2220

}

2172

2221

}

2173

2222

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

2174

2232

if(quit_now){

2175

2233

goto end;

2176

2234

}

2177

2235

2178

ret = init_gnutls_global(pubkey, seckey);

2236

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

2179

2237

if(ret == -1){

2180

2238

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

2181

2239

exitcode = EX_UNAVAILABLE;

2198

2256

goto end;

2199

2257

}

2200

2258

2201

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

2259

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

2202

2260

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

2203

2261

exitcode = EX_UNAVAILABLE;

2204

2262

goto end;

2225

2283

goto end;

2226

2284

}

2227

2285

2228

uint16_t port;

2286

in_port_t port;

2229

2287

errno = 0;

2230

2288

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

2231

2289

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

2232

or tmpmax != (uint16_t)tmpmax){

2290

or tmpmax != (in_port_t)tmpmax){

2233

2291

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

2234

2292

exitcode = EX_USAGE;

2235

2293

goto end;

2236

2294

}

2237

2295

2238

2296

if(quit_now){

2239

2297

goto end;

2240

2298

}

2241

2299

2242

port = (uint16_t)tmpmax;

2300

port = (in_port_t)tmpmax;

2243

2301

*address = '\0';

2244

2302

/* Colon in address indicates IPv6 */

2245

2303

int af;

2261

2319

}

2262

2320

2263

2321

while(not quit_now){

2264

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

2322

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

2323

&mc);

2265

2324

if(quit_now or ret == 0){

2266

2325

break;

2267

2326

}

2293

2352

config.publish_domain = 0;

2294

2353

2295

2354

/* Allocate a new server */

2296

mc.server = avahi_server_new(avahi_simple_poll_get

2297

(mc.simple_poll), &config, NULL,

2298

NULL, &ret_errno);

2355

mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),

2356

&config, NULL, NULL, &ret_errno);

2299

2357

2300

2358

/* Free the Avahi configuration data */

2301

2359

avahi_server_config_free(&config);

2316

2374

/* Create the Avahi service browser */

2317

2375

sb = avahi_s_service_browser_new(mc.server, if_index,

2318

2376

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

2319

NULL, 0, browse_callback, NULL);

2377

NULL, 0, browse_callback,

2378

(void *)&mc);

2320

2379

if(sb == NULL){

2321

2380

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

2322

2381

avahi_strerror(avahi_server_errno(mc.server)));

2334

2393

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

2335

2394

}

2336

2395

2337

ret = avahi_loop_with_timeout(mc.simple_poll,

2338

(int)(retry_interval * 1000));

2396

ret = avahi_loop_with_timeout(simple_poll,

2397

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

2339

2398

if(debug){

2340

2399

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

2341

2400

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

2348

2407

}

2349

2408

2350

2409

/* Cleanup things */

2410

free(mc.interfaces);

2411

2351

2412

if(sb != NULL)

2352

2413

avahi_s_service_browser_free(sb);

2353

2414

2354

2415

if(mc.server != NULL)

2355

2416

avahi_server_free(mc.server);

2356

2417

2357

if(mc.simple_poll != NULL)

2358

avahi_simple_poll_free(mc.simple_poll);

2418

if(simple_poll != NULL)

2419

avahi_simple_poll_free(simple_poll);

2359

2420

2360

2421

if(gnutls_initialized){

2361

2422

gnutls_certificate_free_credentials(mc.cred);

2383

2444

raise_privileges();

2384

2445

2385

2446

/* Run network hooks */

2386

run_network_hooks("stop", interfaces_hooks, delay);

2447

run_network_hooks("stop", interfaces_hooks != NULL ?

2448

interfaces_hooks : "", delay);

2387

2449

2388

2450

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

2389

2451

{