224
236
perror_plus("strdup");
239
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
241
perror_plus("clock_gettime");
227
244
/* Special case of first server */
228
245
if(*current_server == NULL){
229
246
new_server->next = new_server;
230
247
new_server->prev = new_server;
231
248
*current_server = new_server;
232
/* Place the new server last in the list */
250
/* Place the new server last in the list */
234
251
new_server->next = *current_server;
235
252
new_server->prev = (*current_server)->prev;
236
253
new_server->prev->next = new_server;
237
254
(*current_server)->prev = new_server;
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
241
perror_plus("clock_gettime");
248
260
* Initialize GPGME.
250
static bool init_gpgme(const char *seckey, const char *pubkey,
251
const char *tempdir, mandos_context *mc){
262
__attribute__((nonnull, warn_unused_result))
263
static bool init_gpgme(const char * const seckey,
264
const char * const pubkey,
265
const char * const tempdir,
252
267
gpgme_error_t rc;
253
268
gpgme_engine_info_t engine_info;
256
271
* Helper function to insert pub and seckey to the engine keyring.
258
bool import_key(const char *filename){
273
bool import_key(const char * const filename){
261
276
gpgme_data_t pgp_data;
772
790
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
773
791
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
775
792
if(af == AF_INET6){
776
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
793
ret = getnameinfo((struct sockaddr *)&to,
794
sizeof(struct sockaddr_in6),
795
addrstr, sizeof(addrstr), NULL, 0,
779
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
798
ret = getnameinfo((struct sockaddr *)&to,
799
sizeof(struct sockaddr_in),
800
addrstr, sizeof(addrstr), NULL, 0,
783
perror_plus("inet_ntop");
785
if(strcmp(addrstr, ip) != 0){
786
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
803
if(ret == EAI_SYSTEM){
804
perror_plus("getnameinfo");
805
} else if(ret != 0) {
806
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
807
} else if(strcmp(addrstr, ip) != 0){
808
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
1478
1507
return ret_errno;
1481
bool run_network_hooks(const char *mode, const char *interface,
1512
* Based on the example in the GNU LibC manual chapter 13.13 "File
1513
* Descriptor Flags".
1514
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
1516
__attribute__((warn_unused_result))
1517
static int set_cloexec_flag(int fd){
1518
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
1519
/* If reading the flags failed, return error indication now. */
1523
/* Store modified flag word in the descriptor. */
1524
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
1527
#endif /* not O_CLOEXEC */
1529
__attribute__((nonnull))
1530
void run_network_hooks(const char *mode, const char *interface,
1482
1531
const float delay){
1483
1532
struct dirent **direntries;
1533
if(hookdir_fd == -1){
1534
hookdir_fd = open(hookdir, O_RDONLY |
1537
#else /* not O_CLOEXEC */
1539
#endif /* not O_CLOEXEC */
1541
if(hookdir_fd == -1){
1542
if(errno == ENOENT){
1544
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1545
" found\n", hookdir);
1548
perror_plus("open");
1553
if(set_cloexec_flag(hookdir_fd) < 0){
1554
perror_plus("set_cloexec_flag");
1555
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1556
perror_plus("close");
1562
#endif /* not O_CLOEXEC */
1565
#if __GLIBC_PREREQ(2, 15)
1566
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1567
runnable_hook, alphasort);
1568
#else /* not __GLIBC_PREREQ(2, 15) */
1569
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1571
#endif /* not __GLIBC_PREREQ(2, 15) */
1572
#else /* not __GLIBC__ */
1573
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1575
#endif /* not __GLIBC__ */
1577
perror_plus("scandir");
1484
1580
struct dirent *direntry;
1486
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1489
if(errno == ENOENT){
1491
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1492
" found\n", hookdir);
1495
perror_plus("scandir");
1582
int devnull = open("/dev/null", O_RDONLY);
1583
for(int i = 0; i < numhooks; i++){
1584
direntry = direntries[i];
1586
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1498
int devnull = open("/dev/null", O_RDONLY);
1499
for(int i = 0; i < numhooks; i++){
1500
direntry = direntries[i];
1501
char *fullname = NULL;
1502
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1589
pid_t hook_pid = fork();
1592
/* Raise privileges */
1593
if(raise_privileges_permanently() != 0){
1594
perror_plus("Failed to raise privileges");
1601
perror_plus("setgid");
1604
/* Reset supplementary groups */
1606
ret = setgroups(0, NULL);
1608
perror_plus("setgroups");
1611
ret = dup2(devnull, STDIN_FILENO);
1613
perror_plus("dup2(devnull, STDIN_FILENO)");
1616
ret = close(devnull);
1618
perror_plus("close");
1621
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1623
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1626
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1628
perror_plus("setenv");
1631
ret = setenv("DEVICE", interface, 1);
1633
perror_plus("setenv");
1636
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1638
perror_plus("setenv");
1641
ret = setenv("MODE", mode, 1);
1643
perror_plus("setenv");
1647
ret = asprintf(&delaystring, "%f", (double)delay);
1504
1649
perror_plus("asprintf");
1508
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1511
pid_t hook_pid = fork();
1514
/* Raise privileges */
1515
raise_privileges_permanently();
1520
perror_plus("setgid");
1522
/* Reset supplementary groups */
1524
ret = setgroups(0, NULL);
1526
perror_plus("setgroups");
1528
dup2(devnull, STDIN_FILENO);
1530
dup2(STDERR_FILENO, STDOUT_FILENO);
1531
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1533
perror_plus("setenv");
1536
ret = setenv("DEVICE", interface, 1);
1538
perror_plus("setenv");
1541
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1543
perror_plus("setenv");
1546
ret = setenv("MODE", mode, 1);
1548
perror_plus("setenv");
1552
ret = asprintf(&delaystring, "%f", delay);
1554
perror_plus("asprintf");
1557
ret = setenv("DELAY", delaystring, 1);
1560
perror_plus("setenv");
1652
ret = setenv("DELAY", delaystring, 1);
1563
1654
free(delaystring);
1564
if(connect_to != NULL){
1565
ret = setenv("CONNECT", connect_to, 1);
1567
perror_plus("setenv");
1571
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1572
perror_plus("execl");
1573
_exit(EXIT_FAILURE);
1655
perror_plus("setenv");
1659
if(connect_to != NULL){
1660
ret = setenv("CONNECT", connect_to, 1);
1662
perror_plus("setenv");
1666
if(fexecve(hookdir_fd, (char *const [])
1667
{ direntry->d_name, NULL }, environ) == -1){
1668
perror_plus("fexecve");
1669
_exit(EXIT_FAILURE);
1673
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1674
perror_plus("waitpid");
1677
if(WIFEXITED(status)){
1678
if(WEXITSTATUS(status) != 0){
1679
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1680
" with status %d\n", direntry->d_name,
1681
WEXITSTATUS(status));
1684
} else if(WIFSIGNALED(status)){
1685
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1686
" signal %d\n", direntry->d_name,
1577
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1578
perror_plus("waitpid");
1582
if(WIFEXITED(status)){
1583
if(WEXITSTATUS(status) != 0){
1584
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1585
" with status %d\n", direntry->d_name,
1586
WEXITSTATUS(status));
1590
} else if(WIFSIGNALED(status)){
1591
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1592
" signal %d\n", direntry->d_name,
1597
fprintf_plus(stderr, "Warning: network hook \"%s\""
1598
" crashed\n", direntry->d_name);
1605
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1690
fprintf_plus(stderr, "Warning: network hook \"%s\""
1691
" crashed\n", direntry->d_name);
1696
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1700
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1701
perror_plus("close");
1708
__attribute__((nonnull, warn_unused_result))
1614
1709
error_t bring_up_interface(const char *const interface,
1615
1710
const float delay){
1617
1711
error_t old_errno = errno;
1618
error_t ret_errno = 0;
1619
int ret, ret_setflags;
1620
1713
struct ifreq network;
1621
1714
unsigned int if_index = if_nametoindex(interface);
1622
1715
if(if_index == 0){
2442
/* Re-raise priviliges */
2579
/* Re-raise privileges */
2446
/* Run network hooks */
2447
run_network_hooks("stop", interfaces_hooks != NULL ?
2448
interfaces_hooks : "", delay);
2450
/* Take down the network interfaces which were brought up */
2452
char *interface = NULL;
2453
while((interface=argz_next(interfaces_to_take_down,
2454
interfaces_to_take_down_size,
2456
ret_errno = take_down_interface(interface);
2459
perror_plus("Failed to take down interface");
2462
if(debug and (interfaces_to_take_down == NULL)){
2463
fprintf_plus(stderr, "No interfaces needed to be taken"
2468
lower_privileges_permanently();
2581
ret_errno = raise_privileges();
2583
perror_plus("Failed to raise privileges");
2586
/* Run network hooks */
2587
run_network_hooks("stop", interfaces_hooks != NULL ?
2588
interfaces_hooks : "", delay);
2590
/* Take down the network interfaces which were brought up */
2592
char *interface = NULL;
2593
while((interface=argz_next(interfaces_to_take_down,
2594
interfaces_to_take_down_size,
2596
ret_errno = take_down_interface(interface);
2599
perror_plus("Failed to take down interface");
2602
if(debug and (interfaces_to_take_down == NULL)){
2603
fprintf_plus(stderr, "No interfaces needed to be taken"
2609
ret_errno = lower_privileges_permanently();
2611
perror_plus("Failed to lower privileges permanently");
2471
2615
free(interfaces_to_take_down);
2472
2616
free(interfaces_hooks);
2474
2618
/* Removes the GPGME temp directory and all files inside */
2475
if(tempdir_created){
2619
if(tempdir != NULL){
2476
2620
struct dirent **direntries = NULL;
2477
struct dirent *direntry = NULL;
2478
int numentries = scandir(tempdir, &direntries, notdotentries,
2480
if (numentries > 0){
2481
for(int i = 0; i < numentries; i++){
2482
direntry = direntries[i];
2483
char *fullname = NULL;
2484
ret = asprintf(&fullname, "%s/%s", tempdir,
2487
perror_plus("asprintf");
2490
ret = remove(fullname);
2492
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2621
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY));
2622
if(tempdir_fd == -1){
2623
perror_plus("open");
2626
#if __GLIBC_PREREQ(2, 15)
2627
int numentries = scandirat(tempdir_fd, ".", &direntries,
2628
notdotentries, alphasort);
2629
#else /* not __GLIBC_PREREQ(2, 15) */
2630
int numentries = scandir(tempdir, &direntries, notdotentries,
2632
#endif /* not __GLIBC_PREREQ(2, 15) */
2633
#else /* not __GLIBC__ */
2634
int numentries = scandir(tempdir, &direntries, notdotentries,
2636
#endif /* not __GLIBC__ */
2638
for(int i = 0; i < numentries; i++){
2639
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2641
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2642
" \"%s\", 0): %s\n", tempdir,
2643
direntries[i]->d_name, strerror(errno));
2647
/* need to clean even if 0 because man page doesn't specify */
2649
if(numentries == -1){
2650
perror_plus("scandir");
2652
ret = rmdir(tempdir);
2653
if(ret == -1 and errno != ENOENT){
2654
perror_plus("rmdir");
2499
/* need to clean even if 0 because man page doesn't specify */
2501
if (numentries == -1){
2502
perror_plus("scandir");
2504
ret = rmdir(tempdir);
2505
if(ret == -1 and errno != ENOENT){
2506
perror_plus("rmdir");
2657
TEMP_FAILURE_RETRY(close(tempdir_fd));