32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
33
#ifndef _LARGEFILE_SOURCE
34
34
#define _LARGEFILE_SOURCE
35
#endif /* not _LARGEFILE_SOURCE */
36
36
#ifndef _FILE_OFFSET_BITS
37
37
#define _FILE_OFFSET_BITS 64
38
#endif /* not _FILE_OFFSET_BITS */
40
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
44
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
47
strtof(), abort() */
48
48
#include <stdbool.h> /* bool, false, true */
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
49
#include <string.h> /* strcmp(), strlen(), strerror(),
50
asprintf(), strncpy() */
51
51
#include <sys/ioctl.h> /* ioctl */
52
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
53
sockaddr_in6, PF_INET6,
229
256
new_server->next = new_server;
230
257
new_server->prev = new_server;
231
258
*current_server = new_server;
232
/* Place the new server last in the list */
260
/* Place the new server last in the list */
234
261
new_server->next = *current_server;
235
262
new_server->prev = (*current_server)->prev;
236
263
new_server->prev->next = new_server;
237
264
(*current_server)->prev = new_server;
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
241
perror_plus("clock_gettime");
248
270
* Initialize GPGME.
250
static bool init_gpgme(const char *seckey, const char *pubkey,
251
const char *tempdir, mandos_context *mc){
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,
252
277
gpgme_error_t rc;
253
278
gpgme_engine_info_t engine_info;
256
281
* Helper function to insert pub and seckey to the engine keyring.
258
bool import_key(const char *filename){
283
bool import_key(const char * const filename){
261
286
gpgme_data_t pgp_data;
467
493
return plaintext_length;
470
static const char * safer_gnutls_strerror(int value){
496
__attribute__((warn_unused_result, const))
497
static const char *safe_string(const char *str){
503
__attribute__((warn_unused_result))
504
static const char *safer_gnutls_strerror(int value){
471
505
const char *ret = gnutls_strerror(value);
506
return safe_string(ret);
477
509
/* GnuTLS log function callback */
510
__attribute__((nonnull))
478
511
static void debuggnutls(__attribute__((unused)) int level,
479
512
const char* string){
480
513
fprintf_plus(stderr, "GnuTLS: %s", string);
516
__attribute__((nonnull(1, 2, 4), warn_unused_result))
483
517
static int init_gnutls_global(const char *pubkeyfilename,
484
518
const char *seckeyfilename,
519
const char *dhparamsfilename,
485
520
mandos_context *mc){
489
525
fprintf_plus(stderr, "Initializing GnuTLS\n");
492
ret = gnutls_global_init();
493
if(ret != GNUTLS_E_SUCCESS){
494
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
495
safer_gnutls_strerror(ret));
500
529
/* "Use a log level over 10 to enable all debugging options."
501
530
* - GnuTLS manual
540
568
safer_gnutls_strerror(ret));
543
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
544
if(ret != GNUTLS_E_SUCCESS){
545
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
546
safer_gnutls_strerror(ret));
571
/* If a Diffie-Hellman parameters file was given, try to use it */
572
if(dhparamsfilename != NULL){
573
gnutls_datum_t params = { .data = NULL, .size = 0 };
575
int dhpfile = open(dhparamsfilename, O_RDONLY);
578
dhparamsfilename = NULL;
581
size_t params_capacity = 0;
583
params_capacity = incbuffer((char **)¶ms.data,
585
(size_t)params_capacity);
586
if(params_capacity == 0){
587
perror_plus("incbuffer");
590
dhparamsfilename = NULL;
593
ssize_t bytes_read = read(dhpfile,
594
params.data + params.size,
600
/* check bytes_read for failure */
605
dhparamsfilename = NULL;
608
params.size += (unsigned int)bytes_read;
610
if(params.data == NULL){
611
dhparamsfilename = NULL;
613
if(dhparamsfilename == NULL){
616
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
617
GNUTLS_X509_FMT_PEM);
618
if(ret != GNUTLS_E_SUCCESS){
619
fprintf_plus(stderr, "Failed to parse DH parameters in file"
620
" \"%s\": %s\n", dhparamsfilename,
621
safer_gnutls_strerror(ret));
622
dhparamsfilename = NULL;
626
if(dhparamsfilename == NULL){
627
if(mc->dh_bits == 0){
628
/* Find out the optimal number of DH bits */
629
/* Try to read the private key file */
630
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
632
int secfile = open(seckeyfilename, O_RDONLY);
637
size_t buffer_capacity = 0;
639
buffer_capacity = incbuffer((char **)&buffer.data,
641
(size_t)buffer_capacity);
642
if(buffer_capacity == 0){
643
perror_plus("incbuffer");
648
ssize_t bytes_read = read(secfile,
649
buffer.data + buffer.size,
655
/* check bytes_read for failure */
662
buffer.size += (unsigned int)bytes_read;
666
/* If successful, use buffer to parse private key */
667
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
668
if(buffer.data != NULL){
670
gnutls_openpgp_privkey_t privkey = NULL;
671
ret = gnutls_openpgp_privkey_init(&privkey);
672
if(ret != GNUTLS_E_SUCCESS){
673
fprintf_plus(stderr, "Error initializing OpenPGP key"
675
safer_gnutls_strerror(ret));
679
ret = gnutls_openpgp_privkey_import
680
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
681
if(ret != GNUTLS_E_SUCCESS){
682
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
683
safer_gnutls_strerror(ret));
689
/* Use private key to suggest an appropriate
691
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
692
gnutls_openpgp_privkey_deinit(privkey);
694
fprintf_plus(stderr, "This OpenPGP key implies using"
695
" a GnuTLS security parameter \"%s\".\n",
696
safe_string(gnutls_sec_param_get_name
702
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
703
/* Err on the side of caution */
704
sec_param = GNUTLS_SEC_PARAM_ULTRA;
706
fprintf_plus(stderr, "Falling back to security parameter"
708
safe_string(gnutls_sec_param_get_name
713
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
717
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
718
" implies %u DH bits; using that.\n",
719
safe_string(gnutls_sec_param_get_name
724
fprintf_plus(stderr, "Failed to get implied number of DH"
725
" bits for security parameter \"%s\"): %s\n",
726
safe_string(gnutls_sec_param_get_name
728
safer_gnutls_strerror(ret));
732
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
735
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
736
if(ret != GNUTLS_E_SUCCESS){
737
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
738
" bits): %s\n", mc->dh_bits,
739
safer_gnutls_strerror(ret));
550
743
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
620
811
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
621
812
__attribute__((unused)) const char *txt){}
814
/* Set effective uid to 0, return errno */
815
__attribute__((warn_unused_result))
816
error_t raise_privileges(void){
817
error_t old_errno = errno;
818
error_t ret_errno = 0;
819
if(seteuid(0) == -1){
826
/* Set effective and real user ID to 0. Return errno. */
827
__attribute__((warn_unused_result))
828
error_t raise_privileges_permanently(void){
829
error_t old_errno = errno;
830
error_t ret_errno = raise_privileges();
842
/* Set effective user ID to unprivileged saved user ID */
843
__attribute__((warn_unused_result))
844
error_t lower_privileges(void){
845
error_t old_errno = errno;
846
error_t ret_errno = 0;
847
if(seteuid(uid) == -1){
854
/* Lower privileges permanently */
855
__attribute__((warn_unused_result))
856
error_t lower_privileges_permanently(void){
857
error_t old_errno = errno;
858
error_t ret_errno = 0;
859
if(setuid(uid) == -1){
866
/* Helper function to add_local_route() and delete_local_route() */
867
__attribute__((nonnull, warn_unused_result))
868
static bool add_delete_local_route(const bool add,
870
AvahiIfIndex if_index){
872
char helper[] = "mandos-client-iprouteadddel";
873
char add_arg[] = "add";
874
char delete_arg[] = "delete";
875
char debug_flag[] = "--debug";
876
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
877
if(pluginhelperdir == NULL){
879
fprintf_plus(stderr, "MANDOSPLUGINHELPERDIR environment"
880
" variable not set; cannot run helper\n");
885
char interface[IF_NAMESIZE];
886
if(if_indextoname((unsigned int)if_index, interface) == NULL){
887
perror_plus("if_indextoname");
891
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
893
perror_plus("open(\"/dev/null\", O_RDONLY)");
899
/* Raise privileges */
900
errno = raise_privileges_permanently();
902
perror_plus("Failed to raise privileges");
903
/* _exit(EX_NOPERM); */
909
perror_plus("setgid");
912
/* Reset supplementary groups */
914
ret = setgroups(0, NULL);
916
perror_plus("setgroups");
920
ret = dup2(devnull, STDIN_FILENO);
922
perror_plus("dup2(devnull, STDIN_FILENO)");
925
ret = close(devnull);
927
perror_plus("close");
930
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
932
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
935
int helperdir_fd = (int)TEMP_FAILURE_RETRY(open(pluginhelperdir,
940
if(helperdir_fd == -1){
942
_exit(EX_UNAVAILABLE);
944
int helper_fd = (int)TEMP_FAILURE_RETRY(openat(helperdir_fd,
947
perror_plus("openat");
949
_exit(EX_UNAVAILABLE);
953
#pragma GCC diagnostic push
954
#pragma GCC diagnostic ignored "-Wcast-qual"
956
if(fexecve(helper_fd, (char *const [])
957
{ helper, add ? add_arg : delete_arg, (char *)address,
958
interface, debug ? debug_flag : NULL, NULL },
961
#pragma GCC diagnostic pop
963
perror_plus("fexecve");
975
pret = waitpid(pid, &status, 0);
976
if(pret == -1 and errno == EINTR and quit_now){
977
int errno_raising = 0;
978
if((errno = raise_privileges()) != 0){
979
errno_raising = errno;
980
perror_plus("Failed to raise privileges in order to"
981
" kill helper program");
983
if(kill(pid, SIGTERM) == -1){
986
if((errno_raising == 0) and (errno = lower_privileges()) != 0){
987
perror_plus("Failed to lower privileges after killing"
992
} while(pret == -1 and errno == EINTR);
994
perror_plus("waitpid");
997
if(WIFEXITED(status)){
998
if(WEXITSTATUS(status) != 0){
999
fprintf_plus(stderr, "Error: iprouteadddel exited"
1000
" with status %d\n", WEXITSTATUS(status));
1005
if(WIFSIGNALED(status)){
1006
fprintf_plus(stderr, "Error: iprouteadddel died by"
1007
" signal %d\n", WTERMSIG(status));
1010
fprintf_plus(stderr, "Error: iprouteadddel crashed\n");
1014
__attribute__((nonnull, warn_unused_result))
1015
static bool add_local_route(const char *address,
1016
AvahiIfIndex if_index){
1018
fprintf_plus(stderr, "Adding route to %s\n", address);
1020
return add_delete_local_route(true, address, if_index);
1023
__attribute__((nonnull, warn_unused_result))
1024
static bool delete_local_route(const char *address,
1025
AvahiIfIndex if_index){
1027
fprintf_plus(stderr, "Removing route to %s\n", address);
1029
return add_delete_local_route(false, address, if_index);
623
1032
/* Called when a Mandos server is found */
1033
__attribute__((nonnull, warn_unused_result))
624
1034
static int start_mandos_communication(const char *ip, in_port_t port,
625
1035
AvahiIfIndex if_index,
626
1036
int af, mandos_context *mc){
627
1037
int ret, tcp_sd = -1;
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
1039
struct sockaddr_storage to;
633
1040
char *buffer = NULL;
634
1041
char *decrypted_buffer = NULL;
635
1042
size_t buffer_length = 0;
779
1181
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
780
1182
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
783
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
786
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
790
perror_plus("inet_ntop");
792
if(strcmp(addrstr, ip) != 0){
793
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
804
ret = connect(tcp_sd, &to.in6, sizeof(to));
806
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
809
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
811
perror_plus("connect");
1184
ret = getnameinfo((struct sockaddr *)&to,
1185
sizeof(struct sockaddr_in6),
1186
addrstr, sizeof(addrstr), NULL, 0,
1189
ret = getnameinfo((struct sockaddr *)&to,
1190
sizeof(struct sockaddr_in),
1191
addrstr, sizeof(addrstr), NULL, 0,
1194
if(ret == EAI_SYSTEM){
1195
perror_plus("getnameinfo");
1196
} else if(ret != 0) {
1197
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
1198
} else if(strcmp(addrstr, ip) != 0){
1199
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
1210
ret = connect(tcp_sd, (struct sockaddr *)&to,
1211
sizeof(struct sockaddr_in6));
1213
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
1214
sizeof(struct sockaddr_in));
1217
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1218
and if_index != AVAHI_IF_UNSPEC
1219
and connect_to == NULL
1220
and not route_added and
1221
((af == AF_INET6 and not
1222
IN6_IS_ADDR_LINKLOCAL(&(((struct sockaddr_in6 *)
1224
or (af == AF_INET and
1225
/* Not a a IPv4LL address */
1226
(ntohl(((struct sockaddr_in *)&to)->sin_addr.s_addr)
1227
& 0xFFFF0000L) != 0xA9FE0000L))){
1228
/* Work around Avahi bug - Avahi does not announce link-local
1229
addresses if it has a global address, so local hosts with
1230
*only* a link-local address (e.g. Mandos clients) cannot
1231
connect to a Mandos server announced by Avahi on a server
1232
host with a global address. Work around this by retrying
1233
with an explicit route added with the server's address.
1235
Avahi bug reference:
1236
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1237
https://bugs.debian.org/587961
1240
fprintf_plus(stderr, "Mandos server unreachable, trying"
1244
route_added = add_local_route(ip, if_index);
1250
if(errno != ECONNREFUSED or debug){
1252
perror_plus("connect");
822
1265
const char *out = mandos_protocol_version;
1426
1879
ret = avahi_simple_poll_iterate(s, (int)block_time);
1429
if (ret > 0 or errno != EINTR){
1882
if(ret > 0 or errno != EINTR){
1430
1883
return (ret != 1) ? ret : 0;
1436
/* Set effective uid to 0, return errno */
1437
error_t raise_privileges(void){
1438
error_t old_errno = errno;
1439
error_t ret_errno = 0;
1440
if(seteuid(0) == -1){
1442
perror_plus("seteuid");
1448
/* Set effective and real user ID to 0. Return errno. */
1449
error_t raise_privileges_permanently(void){
1450
error_t old_errno = errno;
1451
error_t ret_errno = raise_privileges();
1456
if(setuid(0) == -1){
1458
perror_plus("seteuid");
1464
/* Set effective user ID to unprivileged saved user ID */
1465
error_t lower_privileges(void){
1466
error_t old_errno = errno;
1467
error_t ret_errno = 0;
1468
if(seteuid(uid) == -1){
1470
perror_plus("seteuid");
1476
/* Lower privileges permanently */
1477
error_t lower_privileges_permanently(void){
1478
error_t old_errno = errno;
1479
error_t ret_errno = 0;
1480
if(setuid(uid) == -1){
1482
perror_plus("setuid");
1488
bool run_network_hooks(const char *mode, const char *interface,
1889
__attribute__((nonnull))
1890
void run_network_hooks(const char *mode, const char *interface,
1489
1891
const float delay){
1490
struct dirent **direntries;
1892
struct dirent **direntries = NULL;
1893
if(hookdir_fd == -1){
1894
hookdir_fd = open(hookdir, O_RDONLY | O_DIRECTORY | O_PATH
1896
if(hookdir_fd == -1){
1897
if(errno == ENOENT){
1899
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1900
" found\n", hookdir);
1903
perror_plus("open");
1908
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1909
runnable_hook, alphasort);
1911
perror_plus("scandir");
1491
1914
struct dirent *direntry;
1493
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1496
if(errno == ENOENT){
1498
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1499
" found\n", hookdir);
1502
perror_plus("scandir");
1916
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1918
perror_plus("open(\"/dev/null\", O_RDONLY)");
1921
for(int i = 0; i < numhooks; i++){
1922
direntry = direntries[i];
1924
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1505
int devnull = open("/dev/null", O_RDONLY);
1506
for(int i = 0; i < numhooks; i++){
1507
direntry = direntries[i];
1508
char *fullname = NULL;
1509
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1927
pid_t hook_pid = fork();
1930
/* Raise privileges */
1931
errno = raise_privileges_permanently();
1933
perror_plus("Failed to raise privileges");
1940
perror_plus("setgid");
1943
/* Reset supplementary groups */
1945
ret = setgroups(0, NULL);
1947
perror_plus("setgroups");
1950
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1952
perror_plus("setenv");
1955
ret = setenv("DEVICE", interface, 1);
1957
perror_plus("setenv");
1960
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1962
perror_plus("setenv");
1965
ret = setenv("MODE", mode, 1);
1967
perror_plus("setenv");
1971
ret = asprintf(&delaystring, "%f", (double)delay);
1511
1973
perror_plus("asprintf");
1515
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1518
pid_t hook_pid = fork();
1521
/* Raise privileges */
1522
raise_privileges_permanently();
1527
perror_plus("setgid");
1529
/* Reset supplementary groups */
1531
ret = setgroups(0, NULL);
1533
perror_plus("setgroups");
1535
dup2(devnull, STDIN_FILENO);
1537
dup2(STDERR_FILENO, STDOUT_FILENO);
1538
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1540
perror_plus("setenv");
1543
ret = setenv("DEVICE", interface, 1);
1545
perror_plus("setenv");
1548
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1550
perror_plus("setenv");
1553
ret = setenv("MODE", mode, 1);
1555
perror_plus("setenv");
1559
ret = asprintf(&delaystring, "%f", delay);
1561
perror_plus("asprintf");
1564
ret = setenv("DELAY", delaystring, 1);
1567
perror_plus("setenv");
1976
ret = setenv("DELAY", delaystring, 1);
1570
1978
free(delaystring);
1571
if(connect_to != NULL){
1572
ret = setenv("CONNECT", connect_to, 1);
1574
perror_plus("setenv");
1578
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1579
perror_plus("execl");
1580
_exit(EXIT_FAILURE);
1979
perror_plus("setenv");
1983
if(connect_to != NULL){
1984
ret = setenv("CONNECT", connect_to, 1);
1986
perror_plus("setenv");
1990
int hook_fd = (int)TEMP_FAILURE_RETRY(openat(hookdir_fd,
1994
perror_plus("openat");
1995
_exit(EXIT_FAILURE);
1997
if(close(hookdir_fd) == -1){
1998
perror_plus("close");
1999
_exit(EXIT_FAILURE);
2001
ret = dup2(devnull, STDIN_FILENO);
2003
perror_plus("dup2(devnull, STDIN_FILENO)");
2006
ret = close(devnull);
2008
perror_plus("close");
2011
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
2013
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
2016
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
2018
perror_plus("fexecve");
2019
_exit(EXIT_FAILURE);
2023
perror_plus("fork");
2028
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
2029
perror_plus("waitpid");
2033
if(WIFEXITED(status)){
2034
if(WEXITSTATUS(status) != 0){
2035
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
2036
" with status %d\n", direntry->d_name,
2037
WEXITSTATUS(status));
2041
} else if(WIFSIGNALED(status)){
2042
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
2043
" signal %d\n", direntry->d_name,
1584
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1585
perror_plus("waitpid");
1589
if(WIFEXITED(status)){
1590
if(WEXITSTATUS(status) != 0){
1591
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1592
" with status %d\n", direntry->d_name,
1593
WEXITSTATUS(status));
1597
} else if(WIFSIGNALED(status)){
1598
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1599
" signal %d\n", direntry->d_name,
1604
fprintf_plus(stderr, "Warning: network hook \"%s\""
1605
" crashed\n", direntry->d_name);
1612
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
2048
fprintf_plus(stderr, "Warning: network hook \"%s\""
2049
" crashed\n", direntry->d_name);
2055
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
2061
if(close(hookdir_fd) == -1){
2062
perror_plus("close");
2069
__attribute__((nonnull, warn_unused_result))
1621
2070
error_t bring_up_interface(const char *const interface,
1622
2071
const float delay){
1624
2072
error_t old_errno = errno;
1625
error_t ret_errno = 0;
1626
int ret, ret_setflags;
1627
2074
struct ifreq network;
1628
2075
unsigned int if_index = if_nametoindex(interface);
1629
2076
if(if_index == 0){
2441
2970
mc.current_server->prev->next = NULL;
2442
2971
while(mc.current_server != NULL){
2443
2972
server *next = mc.current_server->next;
2974
#pragma GCC diagnostic push
2975
#pragma GCC diagnostic ignored "-Wcast-qual"
2977
free((char *)(mc.current_server->ip));
2979
#pragma GCC diagnostic pop
2444
2981
free(mc.current_server);
2445
2982
mc.current_server = next;
2449
/* Re-raise priviliges */
2986
/* Re-raise privileges */
2453
/* Run network hooks */
2454
run_network_hooks("stop", interfaces_hooks != NULL ?
2455
interfaces_hooks : "", delay);
2457
/* Take down the network interfaces which were brought up */
2459
char *interface = NULL;
2460
while((interface=argz_next(interfaces_to_take_down,
2461
interfaces_to_take_down_size,
2463
ret_errno = take_down_interface(interface);
2466
perror_plus("Failed to take down interface");
2469
if(debug and (interfaces_to_take_down == NULL)){
2470
fprintf_plus(stderr, "No interfaces needed to be taken"
2475
lower_privileges_permanently();
2988
ret_errno = raise_privileges();
2991
perror_plus("Failed to raise privileges");
2994
/* Run network hooks */
2995
run_network_hooks("stop", interfaces_hooks != NULL ?
2996
interfaces_hooks : "", delay);
2998
/* Take down the network interfaces which were brought up */
3000
char *interface = NULL;
3001
while((interface=argz_next(interfaces_to_take_down,
3002
interfaces_to_take_down_size,
3004
ret_errno = take_down_interface(interface);
3007
perror_plus("Failed to take down interface");
3010
if(debug and (interfaces_to_take_down == NULL)){
3011
fprintf_plus(stderr, "No interfaces needed to be taken"
3017
ret_errno = lower_privileges_permanently();
3020
perror_plus("Failed to lower privileges permanently");
2478
3024
free(interfaces_to_take_down);
2479
3025
free(interfaces_hooks);
2481
3027
/* Removes the GPGME temp directory and all files inside */
2482
if(tempdir_created){
3028
if(tempdir != NULL){
2483
3029
struct dirent **direntries = NULL;
2484
struct dirent *direntry = NULL;
2485
int numentries = scandir(tempdir, &direntries, notdotentries,
2487
if (numentries > 0){
2488
for(int i = 0; i < numentries; i++){
2489
direntry = direntries[i];
2490
char *fullname = NULL;
2491
ret = asprintf(&fullname, "%s/%s", tempdir,
2494
perror_plus("asprintf");
2497
ret = remove(fullname);
2499
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
3030
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3034
if(tempdir_fd == -1){
3035
perror_plus("open");
3037
int numentries = scandirat(tempdir_fd, ".", &direntries,
3038
notdotentries, alphasort);
3039
if(numentries >= 0){
3040
for(int i = 0; i < numentries; i++){
3041
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
3043
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3044
" \"%s\", 0): %s\n", tempdir,
3045
direntries[i]->d_name, strerror(errno));
3047
free(direntries[i]);
3050
/* need to clean even if 0 because man page doesn't specify */
3052
if(numentries == -1){
3053
perror_plus("scandir");
3055
ret = rmdir(tempdir);
3056
if(ret == -1 and errno != ENOENT){
3057
perror_plus("rmdir");
2506
/* need to clean even if 0 because man page doesn't specify */
2508
if (numentries == -1){
2509
perror_plus("scandir");
2511
ret = rmdir(tempdir);
2512
if(ret == -1 and errno != ENOENT){
2513
perror_plus("rmdir");