256
234
new_server->next = new_server;
257
235
new_server->prev = new_server;
258
236
*current_server = new_server;
237
/* Place the new server last in the list */
260
/* Place the new server last in the list */
261
239
new_server->next = *current_server;
262
240
new_server->prev = (*current_server)->prev;
263
241
new_server->prev->next = new_server;
264
242
(*current_server)->prev = new_server;
244
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
246
perror_plus("clock_gettime");
270
253
* Initialize GPGME.
272
__attribute__((nonnull, warn_unused_result))
273
static bool init_gpgme(const char * const seckey,
274
const char * const pubkey,
275
const char * const tempdir,
255
static bool init_gpgme(const char *seckey, const char *pubkey,
256
const char *tempdir, mandos_context *mc){
277
257
gpgme_error_t rc;
278
258
gpgme_engine_info_t engine_info;
281
261
* Helper function to insert pub and seckey to the engine keyring.
283
bool import_key(const char * const filename){
263
bool import_key(const char *filename){
286
266
gpgme_data_t pgp_data;
800
784
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
801
785
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
802
787
if(af == AF_INET6){
803
ret = getnameinfo((struct sockaddr *)&to,
804
sizeof(struct sockaddr_in6),
805
addrstr, sizeof(addrstr), NULL, 0,
788
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
808
ret = getnameinfo((struct sockaddr *)&to,
809
sizeof(struct sockaddr_in),
810
addrstr, sizeof(addrstr), NULL, 0,
791
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
813
if(ret == EAI_SYSTEM){
814
perror_plus("getnameinfo");
815
} else if(ret != 0) {
816
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
817
} else if(strcmp(addrstr, ip) != 0){
818
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
795
perror_plus("inet_ntop");
797
if(strcmp(addrstr, ip) != 0){
798
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
1485
1461
if(setuid(0) == -1){
1486
1462
ret_errno = errno;
1463
perror_plus("seteuid");
1488
1465
errno = old_errno;
1489
1466
return ret_errno;
1492
1469
/* Set effective user ID to unprivileged saved user ID */
1493
__attribute__((warn_unused_result))
1494
1470
error_t lower_privileges(void){
1495
1471
error_t old_errno = errno;
1496
1472
error_t ret_errno = 0;
1497
1473
if(seteuid(uid) == -1){
1498
1474
ret_errno = errno;
1475
perror_plus("seteuid");
1500
1477
errno = old_errno;
1501
1478
return ret_errno;
1504
1481
/* Lower privileges permanently */
1505
__attribute__((warn_unused_result))
1506
1482
error_t lower_privileges_permanently(void){
1507
1483
error_t old_errno = errno;
1508
1484
error_t ret_errno = 0;
1509
1485
if(setuid(uid) == -1){
1510
1486
ret_errno = errno;
1487
perror_plus("setuid");
1512
1489
errno = old_errno;
1513
1490
return ret_errno;
1516
__attribute__((nonnull))
1517
void run_network_hooks(const char *mode, const char *interface,
1493
bool run_network_hooks(const char *mode, const char *interface,
1518
1494
const float delay){
1519
struct dirent **direntries = NULL;
1520
if(hookdir_fd == -1){
1521
hookdir_fd = open(hookdir, O_RDONLY);
1522
if(hookdir_fd == -1){
1523
if(errno == ENOENT){
1525
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1526
" found\n", hookdir);
1529
perror_plus("open");
1535
#if __GLIBC_PREREQ(2, 15)
1536
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1537
runnable_hook, alphasort);
1538
#else /* not __GLIBC_PREREQ(2, 15) */
1539
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1541
#endif /* not __GLIBC_PREREQ(2, 15) */
1542
#else /* not __GLIBC__ */
1543
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1545
#endif /* not __GLIBC__ */
1495
struct dirent **direntries;
1496
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1546
1498
if(numhooks == -1){
1547
perror_plus("scandir");
1550
struct dirent *direntry;
1552
int devnull = open("/dev/null", O_RDONLY);
1553
for(int i = 0; i < numhooks; i++){
1554
direntry = direntries[i];
1556
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1499
if(errno == ENOENT){
1501
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1502
" found\n", hookdir);
1505
perror_plus("scandir");
1559
pid_t hook_pid = fork();
1562
/* Raise privileges */
1563
errno = raise_privileges_permanently();
1565
perror_plus("Failed to raise privileges");
1572
perror_plus("setgid");
1575
/* Reset supplementary groups */
1577
ret = setgroups(0, NULL);
1579
perror_plus("setgroups");
1582
ret = dup2(devnull, STDIN_FILENO);
1584
perror_plus("dup2(devnull, STDIN_FILENO)");
1587
ret = close(devnull);
1589
perror_plus("close");
1592
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1594
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1597
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1599
perror_plus("setenv");
1602
ret = setenv("DEVICE", interface, 1);
1604
perror_plus("setenv");
1607
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1609
perror_plus("setenv");
1612
ret = setenv("MODE", mode, 1);
1614
perror_plus("setenv");
1618
ret = asprintf(&delaystring, "%f", (double)delay);
1508
struct dirent *direntry;
1510
int devnull = open("/dev/null", O_RDONLY);
1511
for(int i = 0; i < numhooks; i++){
1512
direntry = direntries[i];
1513
char *fullname = NULL;
1514
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1620
1516
perror_plus("asprintf");
1623
ret = setenv("DELAY", delaystring, 1);
1520
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1523
pid_t hook_pid = fork();
1526
/* Raise privileges */
1527
raise_privileges_permanently();
1532
perror_plus("setgid");
1534
/* Reset supplementary groups */
1536
ret = setgroups(0, NULL);
1538
perror_plus("setgroups");
1540
dup2(devnull, STDIN_FILENO);
1542
dup2(STDERR_FILENO, STDOUT_FILENO);
1543
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1545
perror_plus("setenv");
1548
ret = setenv("DEVICE", interface, 1);
1550
perror_plus("setenv");
1553
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1555
perror_plus("setenv");
1558
ret = setenv("MODE", mode, 1);
1560
perror_plus("setenv");
1564
ret = asprintf(&delaystring, "%f", delay);
1566
perror_plus("asprintf");
1569
ret = setenv("DELAY", delaystring, 1);
1572
perror_plus("setenv");
1625
1575
free(delaystring);
1626
perror_plus("setenv");
1630
if(connect_to != NULL){
1631
ret = setenv("CONNECT", connect_to, 1);
1633
perror_plus("setenv");
1637
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1639
perror_plus("openat");
1640
_exit(EXIT_FAILURE);
1642
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1643
perror_plus("close");
1644
_exit(EXIT_FAILURE);
1646
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1648
perror_plus("fexecve");
1649
_exit(EXIT_FAILURE);
1653
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1654
perror_plus("waitpid");
1657
if(WIFEXITED(status)){
1658
if(WEXITSTATUS(status) != 0){
1659
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1660
" with status %d\n", direntry->d_name,
1661
WEXITSTATUS(status));
1664
} else if(WIFSIGNALED(status)){
1665
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1666
" signal %d\n", direntry->d_name,
1576
if(connect_to != NULL){
1577
ret = setenv("CONNECT", connect_to, 1);
1579
perror_plus("setenv");
1583
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1584
perror_plus("execl");
1585
_exit(EXIT_FAILURE);
1670
fprintf_plus(stderr, "Warning: network hook \"%s\""
1671
" crashed\n", direntry->d_name);
1676
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1681
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1682
perror_plus("close");
1589
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1590
perror_plus("waitpid");
1594
if(WIFEXITED(status)){
1595
if(WEXITSTATUS(status) != 0){
1596
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1597
" with status %d\n", direntry->d_name,
1598
WEXITSTATUS(status));
1602
} else if(WIFSIGNALED(status)){
1603
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1604
" signal %d\n", direntry->d_name,
1609
fprintf_plus(stderr, "Warning: network hook \"%s\""
1610
" crashed\n", direntry->d_name);
1617
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1689
__attribute__((nonnull, warn_unused_result))
1690
1626
error_t bring_up_interface(const char *const interface,
1691
1627
const float delay){
1692
1629
error_t old_errno = errno;
1630
error_t ret_errno = 0;
1631
int ret, ret_setflags;
1694
1632
struct ifreq network;
1695
1633
unsigned int if_index = if_nametoindex(interface);
1696
1634
if(if_index == 0){
2556
2446
mc.current_server->prev->next = NULL;
2557
2447
while(mc.current_server != NULL){
2558
2448
server *next = mc.current_server->next;
2560
#pragma GCC diagnostic push
2561
#pragma GCC diagnostic ignored "-Wcast-qual"
2563
free((char *)(mc.current_server->ip));
2565
#pragma GCC diagnostic pop
2567
2449
free(mc.current_server);
2568
2450
mc.current_server = next;
2572
/* Re-raise privileges */
2454
/* Re-raise priviliges */
2574
ret_errno = raise_privileges();
2577
perror_plus("Failed to raise privileges");
2580
/* Run network hooks */
2581
run_network_hooks("stop", interfaces_hooks != NULL ?
2582
interfaces_hooks : "", delay);
2584
/* Take down the network interfaces which were brought up */
2586
char *interface = NULL;
2587
while((interface=argz_next(interfaces_to_take_down,
2588
interfaces_to_take_down_size,
2590
ret_errno = take_down_interface(interface);
2593
perror_plus("Failed to take down interface");
2596
if(debug and (interfaces_to_take_down == NULL)){
2597
fprintf_plus(stderr, "No interfaces needed to be taken"
2603
ret_errno = lower_privileges_permanently();
2606
perror_plus("Failed to lower privileges permanently");
2458
/* Run network hooks */
2459
run_network_hooks("stop", interfaces_hooks != NULL ?
2460
interfaces_hooks : "", delay);
2462
/* Take down the network interfaces which were brought up */
2464
char *interface = NULL;
2465
while((interface=argz_next(interfaces_to_take_down,
2466
interfaces_to_take_down_size,
2468
ret_errno = take_down_interface(interface);
2471
perror_plus("Failed to take down interface");
2474
if(debug and (interfaces_to_take_down == NULL)){
2475
fprintf_plus(stderr, "No interfaces needed to be taken"
2480
lower_privileges_permanently();
2610
2483
free(interfaces_to_take_down);
2611
2484
free(interfaces_hooks);
2613
2486
/* Removes the GPGME temp directory and all files inside */
2614
if(tempdir != NULL){
2487
if(tempdir_created){
2615
2488
struct dirent **direntries = NULL;
2616
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2618
if(tempdir_fd == -1){
2619
perror_plus("open");
2622
#if __GLIBC_PREREQ(2, 15)
2623
int numentries = scandirat(tempdir_fd, ".", &direntries,
2624
notdotentries, alphasort);
2625
#else /* not __GLIBC_PREREQ(2, 15) */
2626
int numentries = scandir(tempdir, &direntries, notdotentries,
2628
#endif /* not __GLIBC_PREREQ(2, 15) */
2629
#else /* not __GLIBC__ */
2630
int numentries = scandir(tempdir, &direntries, notdotentries,
2632
#endif /* not __GLIBC__ */
2633
if(numentries >= 0){
2634
for(int i = 0; i < numentries; i++){
2635
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2637
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2638
" \"%s\", 0): %s\n", tempdir,
2639
direntries[i]->d_name, strerror(errno));
2643
/* need to clean even if 0 because man page doesn't specify */
2645
if(numentries == -1){
2646
perror_plus("scandir");
2648
ret = rmdir(tempdir);
2649
if(ret == -1 and errno != ENOENT){
2650
perror_plus("rmdir");
2489
struct dirent *direntry = NULL;
2490
int numentries = scandir(tempdir, &direntries, notdotentries,
2492
if (numentries > 0){
2493
for(int i = 0; i < numentries; i++){
2494
direntry = direntries[i];
2495
char *fullname = NULL;
2496
ret = asprintf(&fullname, "%s/%s", tempdir,
2499
perror_plus("asprintf");
2502
ret = remove(fullname);
2504
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2653
TEMP_FAILURE_RETRY(close(tempdir_fd));
2511
/* need to clean even if 0 because man page doesn't specify */
2513
if (numentries == -1){
2514
perror_plus("scandir");
2516
ret = rmdir(tempdir);
2517
if(ret == -1 and errno != ENOENT){
2518
perror_plus("rmdir");