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(),
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_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> /* strcmp(), strlen(), strerror(),
50
asprintf(), strncpy() */
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
51
51
#include <sys/ioctl.h> /* ioctl */
52
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
53
sockaddr_in6, PF_INET6,
235
215
if(new_server->ip == NULL){
236
216
perror_plus("strdup");
240
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
242
perror_plus("clock_gettime");
244
#pragma GCC diagnostic push
245
#pragma GCC diagnostic ignored "-Wcast-qual"
247
free((char *)(new_server->ip));
249
#pragma GCC diagnostic pop
254
219
/* Special case of first server */
255
if(*current_server == NULL){
220
if (mc.current_server == NULL){
256
221
new_server->next = new_server;
257
222
new_server->prev = new_server;
258
*current_server = new_server;
223
mc.current_server = new_server;
224
/* Place the new server last in the list */
260
/* Place the new server last in the list */
261
new_server->next = *current_server;
262
new_server->prev = (*current_server)->prev;
226
new_server->next = mc.current_server;
227
new_server->prev = mc.current_server->prev;
263
228
new_server->prev->next = new_server;
264
(*current_server)->prev = new_server;
229
mc.current_server->prev = new_server;
231
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
233
perror_plus("clock_gettime");
270
240
* 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,
242
static bool init_gpgme(const char *seckey, const char *pubkey,
243
const char *tempdir){
277
244
gpgme_error_t rc;
278
245
gpgme_engine_info_t engine_info;
281
249
* Helper function to insert pub and seckey to the engine keyring.
283
bool import_key(const char * const filename){
251
bool import_key(const char *filename){
286
254
gpgme_data_t pgp_data;
395
360
rc = gpgme_data_new(&dh_plain);
396
361
if(rc != GPG_ERR_NO_ERROR){
397
362
fprintf_plus(stderr, "Mandos plugin mandos-client: "
398
"bad gpgme_data_new: %s: %s\n",
399
gpgme_strsource(rc), gpgme_strerror(rc));
363
"bad gpgme_data_new: %s: %s\n",
364
gpgme_strsource(rc), gpgme_strerror(rc));
400
365
gpgme_data_release(dh_crypto);
404
369
/* Decrypt data from the cryptotext data buffer to the plaintext
406
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
371
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
407
372
if(rc != GPG_ERR_NO_ERROR){
408
373
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
409
gpgme_strsource(rc), gpgme_strerror(rc));
374
gpgme_strsource(rc), gpgme_strerror(rc));
410
375
plaintext_length = -1;
412
377
gpgme_decrypt_result_t result;
413
result = gpgme_op_decrypt_result(mc->ctx);
378
result = gpgme_op_decrypt_result(mc.ctx);
414
379
if(result == NULL){
415
380
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
417
382
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
418
result->unsupported_algorithm);
383
result->unsupported_algorithm);
419
384
fprintf_plus(stderr, "Wrong key usage: %u\n",
420
result->wrong_key_usage);
385
result->wrong_key_usage);
421
386
if(result->file_name != NULL){
422
387
fprintf_plus(stderr, "File name: %s\n", result->file_name);
543
496
/* OpenPGP credentials */
544
ret = gnutls_certificate_allocate_credentials(&mc->cred);
497
ret = gnutls_certificate_allocate_credentials(&mc.cred);
545
498
if(ret != GNUTLS_E_SUCCESS){
546
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
547
safer_gnutls_strerror(ret));
499
fprintf_plus(stderr, "GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
548
500
gnutls_global_deinit();
553
505
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
554
" secret key %s as GnuTLS credentials\n",
506
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
559
510
ret = gnutls_certificate_set_openpgp_key_file
560
(mc->cred, pubkeyfilename, seckeyfilename,
511
(mc.cred, pubkeyfilename, seckeyfilename,
561
512
GNUTLS_OPENPGP_FMT_BASE64);
562
513
if(ret != GNUTLS_E_SUCCESS){
563
514
fprintf_plus(stderr,
564
515
"Error[%d] while reading the OpenPGP key pair ('%s',"
565
516
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
566
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
567
safer_gnutls_strerror(ret));
517
fprintf_plus(stderr, "The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
571
521
/* GnuTLS server initialization */
572
ret = gnutls_dh_params_init(&mc->dh_params);
573
if(ret != GNUTLS_E_SUCCESS){
574
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
575
" initialization: %s\n",
576
safer_gnutls_strerror(ret));
579
/* If a Diffie-Hellman parameters file was given, try to use it */
580
if(dhparamsfilename != NULL){
581
gnutls_datum_t params = { .data = NULL, .size = 0 };
583
int dhpfile = open(dhparamsfilename, O_RDONLY);
586
dhparamsfilename = NULL;
589
size_t params_capacity = 0;
591
params_capacity = incbuffer((char **)¶ms.data,
593
(size_t)params_capacity);
594
if(params_capacity == 0){
595
perror_plus("incbuffer");
598
dhparamsfilename = NULL;
601
ssize_t bytes_read = read(dhpfile,
602
params.data + params.size,
608
/* check bytes_read for failure */
613
dhparamsfilename = NULL;
616
params.size += (unsigned int)bytes_read;
618
if(params.data == NULL){
619
dhparamsfilename = NULL;
621
if(dhparamsfilename == NULL){
624
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
625
GNUTLS_X509_FMT_PEM);
626
if(ret != GNUTLS_E_SUCCESS){
627
fprintf_plus(stderr, "Failed to parse DH parameters in file"
628
" \"%s\": %s\n", dhparamsfilename,
629
safer_gnutls_strerror(ret));
630
dhparamsfilename = NULL;
634
if(dhparamsfilename == NULL){
635
if(mc->dh_bits == 0){
636
/* Find out the optimal number of DH bits */
637
/* Try to read the private key file */
638
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
640
int secfile = open(seckeyfilename, O_RDONLY);
645
size_t buffer_capacity = 0;
647
buffer_capacity = incbuffer((char **)&buffer.data,
649
(size_t)buffer_capacity);
650
if(buffer_capacity == 0){
651
perror_plus("incbuffer");
656
ssize_t bytes_read = read(secfile,
657
buffer.data + buffer.size,
663
/* check bytes_read for failure */
670
buffer.size += (unsigned int)bytes_read;
674
/* If successful, use buffer to parse private key */
675
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
676
if(buffer.data != NULL){
678
gnutls_openpgp_privkey_t privkey = NULL;
679
ret = gnutls_openpgp_privkey_init(&privkey);
680
if(ret != GNUTLS_E_SUCCESS){
681
fprintf_plus(stderr, "Error initializing OpenPGP key"
683
safer_gnutls_strerror(ret));
687
ret = gnutls_openpgp_privkey_import
688
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
689
if(ret != GNUTLS_E_SUCCESS){
690
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
691
safer_gnutls_strerror(ret));
697
/* Use private key to suggest an appropriate
699
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
700
gnutls_openpgp_privkey_deinit(privkey);
702
fprintf_plus(stderr, "This OpenPGP key implies using"
703
" a GnuTLS security parameter \"%s\".\n",
704
safe_string(gnutls_sec_param_get_name
710
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
711
/* Err on the side of caution */
712
sec_param = GNUTLS_SEC_PARAM_ULTRA;
714
fprintf_plus(stderr, "Falling back to security parameter"
716
safe_string(gnutls_sec_param_get_name
721
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
725
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
726
" implies %u DH bits; using that.\n",
727
safe_string(gnutls_sec_param_get_name
732
fprintf_plus(stderr, "Failed to get implied number of DH"
733
" bits for security parameter \"%s\"): %s\n",
734
safe_string(gnutls_sec_param_get_name
736
safer_gnutls_strerror(ret));
740
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
743
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
744
if(ret != GNUTLS_E_SUCCESS){
745
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
746
" bits): %s\n", mc->dh_bits,
747
safer_gnutls_strerror(ret));
751
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
522
ret = gnutls_dh_params_init(&mc.dh_params);
523
if(ret != GNUTLS_E_SUCCESS){
524
fprintf_plus(stderr, "Error in GnuTLS DH parameter initialization:"
525
" %s\n", safer_gnutls_strerror(ret));
528
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
529
if(ret != GNUTLS_E_SUCCESS){
530
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
531
safer_gnutls_strerror(ret));
535
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
757
gnutls_certificate_free_credentials(mc->cred);
541
gnutls_certificate_free_credentials(mc.cred);
758
542
gnutls_global_deinit();
759
gnutls_dh_params_deinit(mc->dh_params);
543
gnutls_dh_params_deinit(mc.dh_params);
763
__attribute__((nonnull, warn_unused_result))
764
static int init_gnutls_session(gnutls_session_t *session,
547
static int init_gnutls_session(gnutls_session_t *session){
767
549
/* GnuTLS session creation */
820
602
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
821
603
__attribute__((unused)) const char *txt){}
823
/* Set effective uid to 0, return errno */
824
__attribute__((warn_unused_result))
825
error_t raise_privileges(void){
826
error_t old_errno = errno;
827
error_t ret_errno = 0;
828
if(seteuid(0) == -1){
835
/* Set effective and real user ID to 0. Return errno. */
836
__attribute__((warn_unused_result))
837
error_t raise_privileges_permanently(void){
838
error_t old_errno = errno;
839
error_t ret_errno = raise_privileges();
851
/* Set effective user ID to unprivileged saved user ID */
852
__attribute__((warn_unused_result))
853
error_t lower_privileges(void){
854
error_t old_errno = errno;
855
error_t ret_errno = 0;
856
if(seteuid(uid) == -1){
863
/* Lower privileges permanently */
864
__attribute__((warn_unused_result))
865
error_t lower_privileges_permanently(void){
866
error_t old_errno = errno;
867
error_t ret_errno = 0;
868
if(setuid(uid) == -1){
875
/* Helper function to add_local_route() and delete_local_route() */
876
__attribute__((nonnull, warn_unused_result))
877
static bool add_delete_local_route(const bool add,
879
AvahiIfIndex if_index){
881
char helper[] = "mandos-client-iprouteadddel";
882
char add_arg[] = "add";
883
char delete_arg[] = "delete";
884
char debug_flag[] = "--debug";
885
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
886
if(pluginhelperdir == NULL){
888
fprintf_plus(stderr, "MANDOSPLUGINHELPERDIR environment"
889
" variable not set; cannot run helper\n");
894
char interface[IF_NAMESIZE];
895
if(if_indextoname((unsigned int)if_index, interface) == NULL){
896
perror_plus("if_indextoname");
900
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
902
perror_plus("open(\"/dev/null\", O_RDONLY)");
908
/* Raise privileges */
909
errno = raise_privileges_permanently();
911
perror_plus("Failed to raise privileges");
912
/* _exit(EX_NOPERM); */
918
perror_plus("setgid");
921
/* Reset supplementary groups */
923
ret = setgroups(0, NULL);
925
perror_plus("setgroups");
929
ret = dup2(devnull, STDIN_FILENO);
931
perror_plus("dup2(devnull, STDIN_FILENO)");
934
ret = close(devnull);
936
perror_plus("close");
939
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
941
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
944
int helperdir_fd = (int)TEMP_FAILURE_RETRY(open(pluginhelperdir,
949
if(helperdir_fd == -1){
951
_exit(EX_UNAVAILABLE);
953
int helper_fd = (int)TEMP_FAILURE_RETRY(openat(helperdir_fd,
956
perror_plus("openat");
958
_exit(EX_UNAVAILABLE);
962
#pragma GCC diagnostic push
963
#pragma GCC diagnostic ignored "-Wcast-qual"
965
if(fexecve(helper_fd, (char *const [])
966
{ helper, add ? add_arg : delete_arg, (char *)address,
967
interface, debug ? debug_flag : NULL, NULL },
970
#pragma GCC diagnostic pop
972
perror_plus("fexecve");
984
pret = waitpid(pid, &status, 0);
985
if(pret == -1 and errno == EINTR and quit_now){
986
int errno_raising = 0;
987
if((errno = raise_privileges()) != 0){
988
errno_raising = errno;
989
perror_plus("Failed to raise privileges in order to"
990
" kill helper program");
992
if(kill(pid, SIGTERM) == -1){
995
if((errno_raising == 0) and (errno = lower_privileges()) != 0){
996
perror_plus("Failed to lower privileges after killing"
1001
} while(pret == -1 and errno == EINTR);
1003
perror_plus("waitpid");
1006
if(WIFEXITED(status)){
1007
if(WEXITSTATUS(status) != 0){
1008
fprintf_plus(stderr, "Error: iprouteadddel exited"
1009
" with status %d\n", WEXITSTATUS(status));
1014
if(WIFSIGNALED(status)){
1015
fprintf_plus(stderr, "Error: iprouteadddel died by"
1016
" signal %d\n", WTERMSIG(status));
1019
fprintf_plus(stderr, "Error: iprouteadddel crashed\n");
1023
__attribute__((nonnull, warn_unused_result))
1024
static bool add_local_route(const char *address,
1025
AvahiIfIndex if_index){
1027
fprintf_plus(stderr, "Adding route to %s\n", address);
1029
return add_delete_local_route(true, address, if_index);
1032
__attribute__((nonnull, warn_unused_result))
1033
static bool delete_local_route(const char *address,
1034
AvahiIfIndex if_index){
1036
fprintf_plus(stderr, "Removing route to %s\n", address);
1038
return add_delete_local_route(false, address, if_index);
1041
605
/* Called when a Mandos server is found */
1042
__attribute__((nonnull, warn_unused_result))
1043
static int start_mandos_communication(const char *ip, in_port_t port,
606
static int start_mandos_communication(const char *ip, uint16_t port,
1044
607
AvahiIfIndex if_index,
1045
int af, mandos_context *mc){
1046
609
int ret, tcp_sd = -1;
1048
struct sockaddr_storage to;
612
struct sockaddr_in in;
613
struct sockaddr_in6 in6;
1049
615
char *buffer = NULL;
1050
616
char *decrypted_buffer = NULL;
1051
617
size_t buffer_length = 0;
1180
718
if(if_indextoname((unsigned int)if_index, interface) == NULL){
1181
719
perror_plus("if_indextoname");
1183
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
1184
"\n", ip, interface, (uintmax_t)port);
721
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
722
ip, interface, port);
1187
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
1188
ip, (uintmax_t)port);
725
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n", ip, port);
1190
727
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
1191
728
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
1193
ret = getnameinfo((struct sockaddr *)&to,
1194
sizeof(struct sockaddr_in6),
1195
addrstr, sizeof(addrstr), NULL, 0,
1198
ret = getnameinfo((struct sockaddr *)&to,
1199
sizeof(struct sockaddr_in),
1200
addrstr, sizeof(addrstr), NULL, 0,
1203
if(ret == EAI_SYSTEM){
1204
perror_plus("getnameinfo");
1205
} else if(ret != 0) {
1206
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
1207
} else if(strcmp(addrstr, ip) != 0){
1208
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
1219
ret = connect(tcp_sd, (struct sockaddr *)&to,
1220
sizeof(struct sockaddr_in6));
1222
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
1223
sizeof(struct sockaddr_in));
1226
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1227
and if_index != AVAHI_IF_UNSPEC
1228
and connect_to == NULL
1229
and not route_added and
1230
((af == AF_INET6 and not
1231
IN6_IS_ADDR_LINKLOCAL(&(((struct sockaddr_in6 *)
1233
or (af == AF_INET and
1234
/* Not a a IPv4LL address */
1235
(ntohl(((struct sockaddr_in *)&to)->sin_addr.s_addr)
1236
& 0xFFFF0000L) != 0xA9FE0000L))){
1237
/* Work around Avahi bug - Avahi does not announce link-local
1238
addresses if it has a global address, so local hosts with
1239
*only* a link-local address (e.g. Mandos clients) cannot
1240
connect to a Mandos server announced by Avahi on a server
1241
host with a global address. Work around this by retrying
1242
with an explicit route added with the server's address.
1244
Avahi bug reference:
1245
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1246
https://bugs.debian.org/587961
1249
fprintf_plus(stderr, "Mandos server unreachable, trying"
1253
route_added = add_local_route(ip, if_index);
1259
if(errno != ECONNREFUSED or debug){
1261
perror_plus("connect");
731
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
734
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
738
perror_plus("inet_ntop");
740
if(strcmp(addrstr, ip) != 0){
741
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
752
ret = connect(tcp_sd, &to.in6, sizeof(to));
754
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
757
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
759
perror_plus("connect");
1274
770
const char *out = mandos_protocol_version;
1528
1007
avahi_address_snprint(ip, sizeof(ip), address);
1530
1009
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1531
PRIdMAX ") on port %" PRIu16 "\n", name,
1532
host_name, ip, (intmax_t)interface, port);
1010
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1011
ip, (intmax_t)interface, port);
1534
int ret = start_mandos_communication(ip, (in_port_t)port,
1536
avahi_proto_to_af(proto),
1013
int ret = start_mandos_communication(ip, port, interface,
1014
avahi_proto_to_af(proto));
1539
avahi_simple_poll_quit(simple_poll);
1016
avahi_simple_poll_quit(mc.simple_poll);
1541
if(not add_server(ip, (in_port_t)port, interface,
1542
avahi_proto_to_af(proto),
1543
&((mandos_context*)mc)->current_server)){
1544
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1018
ret = add_server(ip, port, interface,
1019
avahi_proto_to_af(proto));
1619
1085
signal_received = sig;
1620
1086
int old_errno = errno;
1621
1087
/* set main loop to exit */
1622
if(simple_poll != NULL){
1623
avahi_simple_poll_quit(simple_poll);
1088
if(mc.simple_poll != NULL){
1089
avahi_simple_poll_quit(mc.simple_poll);
1625
1091
errno = old_errno;
1628
__attribute__((nonnull, warn_unused_result))
1629
1094
bool get_flags(const char *ifname, struct ifreq *ifr){
1633
1097
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1636
1099
perror_plus("socket");
1640
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1641
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1102
strcpy(ifr->ifr_name, ifname);
1642
1103
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1646
1106
perror_plus("ioctl SIOCGIFFLAGS");
1654
__attribute__((nonnull, warn_unused_result))
1655
1113
bool good_flags(const char *ifname, const struct ifreq *ifr){
1657
1115
/* Reject the loopback device */
1658
1116
if(ifr->ifr_flags & IFF_LOOPBACK){
1660
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1118
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n", ifname);
1665
1122
/* Accept point-to-point devices only if connect_to is specified */
1666
1123
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1668
fprintf_plus(stderr, "Accepting point-to-point interface"
1669
" \"%s\"\n", ifname);
1125
fprintf_plus(stderr, "Accepting point-to-point interface \"%s\"\n", ifname);
1673
1129
/* Otherwise, reject non-broadcast-capable devices */
1674
1130
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1676
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1677
" \"%s\"\n", ifname);
1132
fprintf_plus(stderr, "Rejecting non-broadcast interface \"%s\"\n", ifname);
1681
1136
/* Reject non-ARP interfaces (including dummy interfaces) */
1682
1137
if(ifr->ifr_flags & IFF_NOARP){
1684
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1139
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1708
1161
struct ifreq ifr;
1709
1162
if(not get_flags(if_entry->d_name, &ifr)){
1711
fprintf_plus(stderr, "Failed to get flags for interface "
1712
"\"%s\"\n", if_entry->d_name);
1717
if(not good_flags(if_entry->d_name, &ifr)){
1724
* This function determines if a network interface is up.
1726
__attribute__((nonnull, warn_unused_result))
1727
bool interface_is_up(const char *interface){
1729
if(not get_flags(interface, &ifr)){
1731
fprintf_plus(stderr, "Failed to get flags for interface "
1732
"\"%s\"\n", interface);
1737
return (bool)(ifr.ifr_flags & IFF_UP);
1741
* This function determines if a network interface is running
1743
__attribute__((nonnull, warn_unused_result))
1744
bool interface_is_running(const char *interface){
1746
if(not get_flags(interface, &ifr)){
1748
fprintf_plus(stderr, "Failed to get flags for interface "
1749
"\"%s\"\n", interface);
1754
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1757
__attribute__((nonnull, pure, warn_unused_result))
1164
fprintf_plus(stderr, "Failed to get flags for interface \"%s\"\n",
1170
if(not good_flags(if_entry->d_name, &ifr)){
1177
* This function determines if a directory entry in /sys/class/net
1178
* corresponds to an acceptable network device which is up.
1179
* (This function is passed to scandir(3) as a filter function.)
1181
int up_interface(const struct dirent *if_entry){
1182
if(if_entry->d_name[0] == '.'){
1187
if(not get_flags(if_entry->d_name, &ifr)){
1189
fprintf_plus(stderr, "Failed to get flags for interface \"%s\"\n",
1195
/* Reject down interfaces */
1196
if(not (ifr.ifr_flags & IFF_UP)){
1198
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1204
/* Reject non-running interfaces */
1205
if(not (ifr.ifr_flags & IFF_RUNNING)){
1207
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1213
if(not good_flags(if_entry->d_name, &ifr)){
1758
1219
int notdotentries(const struct dirent *direntry){
1759
1220
/* Skip "." and ".." */
1760
1221
if(direntry->d_name[0] == '.'
1888
1347
ret = avahi_simple_poll_iterate(s, (int)block_time);
1891
if(ret > 0 or errno != EINTR){
1350
if (ret > 0 or errno != EINTR){
1892
1351
return (ret != 1) ? ret : 0;
1898
__attribute__((nonnull))
1899
void run_network_hooks(const char *mode, const char *interface,
1901
struct dirent **direntries = NULL;
1902
if(hookdir_fd == -1){
1903
hookdir_fd = open(hookdir, O_RDONLY | O_DIRECTORY | O_PATH
1905
if(hookdir_fd == -1){
1906
if(errno == ENOENT){
1908
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1909
" found\n", hookdir);
1912
perror_plus("open");
1917
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1918
runnable_hook, alphasort);
1920
perror_plus("scandir");
1923
struct dirent *direntry;
1925
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1927
perror_plus("open(\"/dev/null\", O_RDONLY)");
1930
for(int i = 0; i < numhooks; i++){
1931
direntry = direntries[i];
1933
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1936
pid_t hook_pid = fork();
1939
/* Raise privileges */
1940
errno = raise_privileges_permanently();
1942
perror_plus("Failed to raise privileges");
1949
perror_plus("setgid");
1952
/* Reset supplementary groups */
1954
ret = setgroups(0, NULL);
1956
perror_plus("setgroups");
1959
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1961
perror_plus("setenv");
1964
ret = setenv("DEVICE", interface, 1);
1966
perror_plus("setenv");
1969
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1971
perror_plus("setenv");
1974
ret = setenv("MODE", mode, 1);
1976
perror_plus("setenv");
1980
ret = asprintf(&delaystring, "%f", (double)delay);
1982
perror_plus("asprintf");
1985
ret = setenv("DELAY", delaystring, 1);
1988
perror_plus("setenv");
1992
if(connect_to != NULL){
1993
ret = setenv("CONNECT", connect_to, 1);
1995
perror_plus("setenv");
1999
int hook_fd = (int)TEMP_FAILURE_RETRY(openat(hookdir_fd,
2003
perror_plus("openat");
2004
_exit(EXIT_FAILURE);
2006
if(close(hookdir_fd) == -1){
2007
perror_plus("close");
2008
_exit(EXIT_FAILURE);
2010
ret = dup2(devnull, STDIN_FILENO);
2012
perror_plus("dup2(devnull, STDIN_FILENO)");
2015
ret = close(devnull);
2017
perror_plus("close");
2020
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
2022
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
2025
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
2027
perror_plus("fexecve");
2028
_exit(EXIT_FAILURE);
2032
perror_plus("fork");
2037
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
2038
perror_plus("waitpid");
2042
if(WIFEXITED(status)){
2043
if(WEXITSTATUS(status) != 0){
2044
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
2045
" with status %d\n", direntry->d_name,
2046
WEXITSTATUS(status));
2050
} else if(WIFSIGNALED(status)){
2051
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
2052
" signal %d\n", direntry->d_name,
2057
fprintf_plus(stderr, "Warning: network hook \"%s\""
2058
" crashed\n", direntry->d_name);
2064
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
2070
if(close(hookdir_fd) == -1){
2071
perror_plus("close");
2078
__attribute__((nonnull, warn_unused_result))
2079
error_t bring_up_interface(const char *const interface,
2081
error_t old_errno = errno;
2083
struct ifreq network;
2084
unsigned int if_index = if_nametoindex(interface);
2086
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
2096
if(not interface_is_up(interface)){
2097
error_t ret_errno = 0, ioctl_errno = 0;
2098
if(not get_flags(interface, &network)){
2100
fprintf_plus(stderr, "Failed to get flags for interface "
2101
"\"%s\"\n", interface);
2105
network.ifr_flags |= IFF_UP; /* set flag */
2107
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
2110
perror_plus("socket");
2118
perror_plus("close");
2125
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
2129
/* Raise privileges */
2130
ret_errno = raise_privileges();
2133
perror_plus("Failed to raise privileges");
2138
bool restore_loglevel = false;
2140
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
2141
messages about the network interface to mess up the prompt */
2142
ret_linux = klogctl(8, NULL, 5);
2143
if(ret_linux == -1){
2144
perror_plus("klogctl");
2146
restore_loglevel = true;
2149
#endif /* __linux__ */
2150
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
2151
ioctl_errno = errno;
2153
if(restore_loglevel){
2154
ret_linux = klogctl(7, NULL, 0);
2155
if(ret_linux == -1){
2156
perror_plus("klogctl");
2159
#endif /* __linux__ */
2161
/* If raise_privileges() succeeded above */
2163
/* Lower privileges */
2164
ret_errno = lower_privileges();
2167
perror_plus("Failed to lower privileges");
2171
/* Close the socket */
2174
perror_plus("close");
2177
if(ret_setflags == -1){
2178
errno = ioctl_errno;
2179
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
2184
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
2188
/* Sleep checking until interface is running.
2189
Check every 0.25s, up to total time of delay */
2190
for(int i=0; i < delay * 4; i++){
2191
if(interface_is_running(interface)){
2194
struct timespec sleeptime = { .tv_nsec = 250000000 };
2195
ret = nanosleep(&sleeptime, NULL);
2196
if(ret == -1 and errno != EINTR){
2197
perror_plus("nanosleep");
2205
__attribute__((nonnull, warn_unused_result))
2206
error_t take_down_interface(const char *const interface){
2207
error_t old_errno = errno;
2208
struct ifreq network;
2209
unsigned int if_index = if_nametoindex(interface);
2211
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
2215
if(interface_is_up(interface)){
2216
error_t ret_errno = 0, ioctl_errno = 0;
2217
if(not get_flags(interface, &network) and debug){
2219
fprintf_plus(stderr, "Failed to get flags for interface "
2220
"\"%s\"\n", interface);
2224
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2226
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
2229
perror_plus("socket");
2235
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
2239
/* Raise privileges */
2240
ret_errno = raise_privileges();
2243
perror_plus("Failed to raise privileges");
2246
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
2247
ioctl_errno = errno;
2249
/* If raise_privileges() succeeded above */
2251
/* Lower privileges */
2252
ret_errno = lower_privileges();
2255
perror_plus("Failed to lower privileges");
2259
/* Close the socket */
2260
int ret = close(sd);
2262
perror_plus("close");
2265
if(ret_setflags == -1){
2266
errno = ioctl_errno;
2267
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2272
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
2280
1357
int main(int argc, char *argv[]){
2281
mandos_context mc = { .server = NULL, .dh_bits = 0,
2282
.priority = "SECURE256:!CTYPE-X.509"
2283
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2284
.current_server = NULL, .interfaces = NULL,
2285
.interfaces_size = 0 };
2286
1358
AvahiSServiceBrowser *sb = NULL;
2289
1361
intmax_t tmpmax;
2291
1363
int exitcode = EXIT_SUCCESS;
2292
char *interfaces_to_take_down = NULL;
2293
size_t interfaces_to_take_down_size = 0;
2294
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
2295
char old_tempdir[] = "/tmp/mandosXXXXXX";
2296
char *tempdir = NULL;
1364
const char *interface = "";
1365
struct ifreq network;
1367
bool take_down_interface = false;
1370
char tempdir[] = "/tmp/mandosXXXXXX";
1371
bool tempdir_created = false;
2297
1372
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2298
1373
const char *seckey = PATHDIR "/" SECKEY;
2299
1374
const char *pubkey = PATHDIR "/" PUBKEY;
2300
const char *dh_params_file = NULL;
2301
char *interfaces_hooks = NULL;
2303
1376
bool gnutls_initialized = false;
2304
1377
bool gpgme_initialized = false;
2490
1552
/* Work around Debian bug #633582:
2491
1553
<http://bugs.debian.org/633582> */
2493
/* Re-raise privileges */
2494
ret_errno = raise_privileges();
2497
perror_plus("Failed to raise privileges");
1556
/* Re-raise priviliges */
1560
perror_plus("seteuid");
1563
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1564
int seckey_fd = open(seckey, O_RDONLY);
1565
if(seckey_fd == -1){
1566
perror_plus("open");
1568
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1570
perror_plus("fstat");
1572
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1573
ret = fchown(seckey_fd, uid, gid);
1575
perror_plus("fchown");
1579
TEMP_FAILURE_RETRY(close(seckey_fd));
1583
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1584
int pubkey_fd = open(pubkey, O_RDONLY);
1585
if(pubkey_fd == -1){
1586
perror_plus("open");
1588
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1590
perror_plus("fstat");
1592
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1593
ret = fchown(pubkey_fd, uid, gid);
1595
perror_plus("fchown");
1599
TEMP_FAILURE_RETRY(close(pubkey_fd));
1603
/* Lower privileges */
1607
perror_plus("seteuid");
1611
/* Find network hooks and run them */
1613
struct dirent **direntries;
1614
struct dirent *direntry;
1615
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1618
perror_plus("scandir");
2501
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2502
int seckey_fd = open(seckey, O_RDONLY);
2503
if(seckey_fd == -1){
2504
perror_plus("open");
2506
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
2508
perror_plus("fstat");
2510
if(S_ISREG(st.st_mode)
2511
and st.st_uid == 0 and st.st_gid == 0){
2512
ret = fchown(seckey_fd, uid, gid);
2514
perror_plus("fchown");
2522
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2523
int pubkey_fd = open(pubkey, O_RDONLY);
2524
if(pubkey_fd == -1){
2525
perror_plus("open");
2527
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
2529
perror_plus("fstat");
2531
if(S_ISREG(st.st_mode)
2532
and st.st_uid == 0 and st.st_gid == 0){
2533
ret = fchown(pubkey_fd, uid, gid);
2535
perror_plus("fchown");
2543
if(dh_params_file != NULL
2544
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2545
int dhparams_fd = open(dh_params_file, O_RDONLY);
2546
if(dhparams_fd == -1){
2547
perror_plus("open");
2549
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2551
perror_plus("fstat");
2553
if(S_ISREG(st.st_mode)
2554
and st.st_uid == 0 and st.st_gid == 0){
2555
ret = fchown(dhparams_fd, uid, gid);
2557
perror_plus("fchown");
2565
/* Lower privileges */
2566
ret_errno = lower_privileges();
2569
perror_plus("Failed to lower privileges");
2574
/* Remove invalid interface names (except "none") */
2576
char *interface = NULL;
2577
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2579
if(strcmp(interface, "none") != 0
2580
and if_nametoindex(interface) == 0){
2581
if(interface[0] != '\0'){
2582
fprintf_plus(stderr, "Not using nonexisting interface"
2583
" \"%s\"\n", interface);
2585
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2591
/* Run network hooks */
2593
if(mc.interfaces != NULL){
2594
interfaces_hooks = malloc(mc.interfaces_size);
2595
if(interfaces_hooks == NULL){
2596
perror_plus("malloc");
2599
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2600
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2602
run_network_hooks("start", interfaces_hooks != NULL ?
2603
interfaces_hooks : "", delay);
1620
int devnull = open("/dev/null", O_RDONLY);
1621
for(int i = 0; i < numhooks; i++){
1622
direntry = direntries[0];
1623
char *fullname = NULL;
1624
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1626
perror_plus("asprintf");
1629
pid_t hook_pid = fork();
1632
dup2(devnull, STDIN_FILENO);
1634
dup2(STDERR_FILENO, STDOUT_FILENO);
1635
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1637
perror_plus("setenv");
1640
ret = setenv("DEVICE", interface, 1);
1642
perror_plus("setenv");
1645
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1647
perror_plus("setenv");
1650
ret = setenv("MODE", "start", 1);
1652
perror_plus("setenv");
1656
ret = asprintf(&delaystring, "%f", delay);
1658
perror_plus("asprintf");
1661
ret = setenv("DELAY", delaystring, 1);
1664
perror_plus("setenv");
1668
ret = execl(fullname, direntry->d_name, "start", NULL);
1669
perror_plus("execl");
1672
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1673
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));
1685
} else if(WIFSIGNALED(status)){
1686
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1687
" signal %d\n", direntry->d_name,
1692
fprintf_plus(stderr, "Warning: network hook \"%s\" crashed\n",
2607
1708
avahi_set_log_function(empty_log);
1711
if(interface[0] == '\0'){
1712
struct dirent **direntries;
1713
/* First look for interfaces that are up */
1714
ret = scandir(sys_class_net, &direntries, up_interface,
1717
/* No up interfaces, look for any good interfaces */
1719
ret = scandir(sys_class_net, &direntries, good_interface,
1723
/* Pick the first interface returned */
1724
interface = strdup(direntries[0]->d_name);
1726
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1728
if(interface == NULL){
1729
perror_plus("malloc");
1731
exitcode = EXIT_FAILURE;
1737
fprintf_plus(stderr, "Could not find a network interface\n");
1738
exitcode = EXIT_FAILURE;
2610
1743
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2611
1744
from the signal handler */
2612
1745
/* Initialize the pseudo-RNG for Avahi */
2613
1746
srand((unsigned int) time(NULL));
2614
simple_poll = avahi_simple_poll_new();
2615
if(simple_poll == NULL){
2616
fprintf_plus(stderr,
2617
"Avahi: Failed to create simple poll object.\n");
1747
mc.simple_poll = avahi_simple_poll_new();
1748
if(mc.simple_poll == NULL){
1749
fprintf_plus(stderr, "Avahi: Failed to create simple poll object.\n");
2618
1750
exitcode = EX_UNAVAILABLE;
2685
/* If no interfaces were specified, make a list */
2686
if(mc.interfaces == NULL){
2687
struct dirent **direntries = NULL;
2688
/* Look for any good interfaces */
2689
ret = scandir(sys_class_net, &direntries, good_interface,
2692
/* Add all found interfaces to interfaces list */
2693
for(int i = 0; i < ret; ++i){
2694
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2695
direntries[i]->d_name);
2698
perror_plus("argz_add");
2699
free(direntries[i]);
2703
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2704
direntries[i]->d_name);
2706
free(direntries[i]);
1817
/* If the interface is down, bring it up */
1818
if(strcmp(interface, "none") != 0){
1819
if_index = (AvahiIfIndex) if_nametoindex(interface);
1821
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1822
exitcode = EX_UNAVAILABLE;
1830
/* Re-raise priviliges */
1834
perror_plus("seteuid");
1838
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1839
messages about the network interface to mess up the prompt */
1840
ret = klogctl(8, NULL, 5);
1841
bool restore_loglevel = true;
1843
restore_loglevel = false;
1844
perror_plus("klogctl");
1846
#endif /* __linux__ */
1848
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1850
perror_plus("socket");
1851
exitcode = EX_OSERR;
1853
if(restore_loglevel){
1854
ret = klogctl(7, NULL, 0);
1856
perror_plus("klogctl");
1859
#endif /* __linux__ */
1860
/* Lower privileges */
1864
perror_plus("seteuid");
1868
strcpy(network.ifr_name, interface);
1869
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1871
perror_plus("ioctl SIOCGIFFLAGS");
1873
if(restore_loglevel){
1874
ret = klogctl(7, NULL, 0);
1876
perror_plus("klogctl");
1879
#endif /* __linux__ */
1880
exitcode = EX_OSERR;
1881
/* Lower privileges */
1885
perror_plus("seteuid");
1889
if((network.ifr_flags & IFF_UP) == 0){
1890
network.ifr_flags |= IFF_UP;
1891
take_down_interface = true;
1892
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1894
take_down_interface = false;
1895
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1896
exitcode = EX_OSERR;
1898
if(restore_loglevel){
1899
ret = klogctl(7, NULL, 0);
1901
perror_plus("klogctl");
1904
#endif /* __linux__ */
1905
/* Lower privileges */
1909
perror_plus("seteuid");
1914
/* Sleep checking until interface is running.
1915
Check every 0.25s, up to total time of delay */
1916
for(int i=0; i < delay * 4; i++){
1917
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1919
perror_plus("ioctl SIOCGIFFLAGS");
1920
} else if(network.ifr_flags & IFF_RUNNING){
1923
struct timespec sleeptime = { .tv_nsec = 250000000 };
1924
ret = nanosleep(&sleeptime, NULL);
1925
if(ret == -1 and errno != EINTR){
1926
perror_plus("nanosleep");
1929
if(not take_down_interface){
1930
/* We won't need the socket anymore */
1931
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1933
perror_plus("close");
1937
if(restore_loglevel){
1938
/* Restores kernel loglevel to default */
1939
ret = klogctl(7, NULL, 0);
1941
perror_plus("klogctl");
1944
#endif /* __linux__ */
1945
/* Lower privileges */
1947
if(take_down_interface){
1948
/* Lower privileges */
1951
perror_plus("seteuid");
2713
fprintf_plus(stderr, "Could not find a network interface\n");
2714
exitcode = EXIT_FAILURE;
2719
/* Bring up interfaces which are down, and remove any "none"s */
2721
char *interface = NULL;
2722
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2724
/* If interface name is "none", stop bringing up interfaces.
2725
Also remove all instances of "none" from the list */
2726
if(strcmp(interface, "none") == 0){
2727
argz_delete(&mc.interfaces, &mc.interfaces_size,
2730
while((interface = argz_next(mc.interfaces,
2731
mc.interfaces_size, interface))){
2732
if(strcmp(interface, "none") == 0){
2733
argz_delete(&mc.interfaces, &mc.interfaces_size,
2740
bool interface_was_up = interface_is_up(interface);
2741
errno = bring_up_interface(interface, delay);
2742
if(not interface_was_up){
2744
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2745
" %s\n", interface, strerror(errno));
2747
errno = argz_add(&interfaces_to_take_down,
2748
&interfaces_to_take_down_size,
2751
perror_plus("argz_add");
2756
if(debug and (interfaces_to_take_down == NULL)){
2757
fprintf_plus(stderr, "No interfaces were brought up\n");
2761
/* If we only got one interface, explicitly use only that one */
2762
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2764
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2767
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
1954
/* Lower privileges permanently */
1957
perror_plus("setuid");
2774
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
1966
ret = init_gnutls_global(pubkey, seckey);
2776
1968
fprintf_plus(stderr, "init_gnutls_global failed\n");
2777
1969
exitcode = EX_UNAVAILABLE;
2973
2152
if(gpgme_initialized){
2974
2153
gpgme_release(mc.ctx);
2977
2156
/* Cleans up the circular linked list of Mandos servers the client
2979
2158
if(mc.current_server != NULL){
2980
2159
mc.current_server->prev->next = NULL;
2981
2160
while(mc.current_server != NULL){
2982
2161
server *next = mc.current_server->next;
2984
#pragma GCC diagnostic push
2985
#pragma GCC diagnostic ignored "-Wcast-qual"
2987
free((char *)(mc.current_server->ip));
2989
#pragma GCC diagnostic pop
2991
2162
free(mc.current_server);
2992
2163
mc.current_server = next;
2996
/* Re-raise privileges */
2998
ret_errno = raise_privileges();
3001
perror_plus("Failed to raise privileges");
3004
/* Run network hooks */
3005
run_network_hooks("stop", interfaces_hooks != NULL ?
3006
interfaces_hooks : "", delay);
3008
/* Take down the network interfaces which were brought up */
3010
char *interface = NULL;
3011
while((interface=argz_next(interfaces_to_take_down,
3012
interfaces_to_take_down_size,
3014
ret_errno = take_down_interface(interface);
3017
perror_plus("Failed to take down interface");
3020
if(debug and (interfaces_to_take_down == NULL)){
3021
fprintf_plus(stderr, "No interfaces needed to be taken"
2167
/* XXX run network hooks "stop" here */
2169
/* Take down the network interface */
2170
if(take_down_interface){
2171
/* Re-raise priviliges */
2175
perror_plus("seteuid");
3027
ret_errno = lower_privileges_permanently();
3030
perror_plus("Failed to lower privileges permanently");
2178
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2180
perror_plus("ioctl SIOCGIFFLAGS");
2181
} else if(network.ifr_flags & IFF_UP){
2182
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2183
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2185
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2188
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2190
perror_plus("close");
2192
/* Lower privileges permanently */
2196
perror_plus("setuid");
3034
free(interfaces_to_take_down);
3035
free(interfaces_hooks);
3037
2201
/* Removes the GPGME temp directory and all files inside */
3038
if(tempdir != NULL){
2202
if(tempdir_created){
3039
2203
struct dirent **direntries = NULL;
3040
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3044
if(tempdir_fd == -1){
3045
perror_plus("open");
3047
int numentries = scandirat(tempdir_fd, ".", &direntries,
3048
notdotentries, alphasort);
3049
if(numentries >= 0){
3050
for(int i = 0; i < numentries; i++){
3051
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
3053
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3054
" \"%s\", 0): %s\n", tempdir,
3055
direntries[i]->d_name, strerror(errno));
3057
free(direntries[i]);
3060
/* need to clean even if 0 because man page doesn't specify */
3062
if(numentries == -1){
3063
perror_plus("scandir");
3065
ret = rmdir(tempdir);
3066
if(ret == -1 and errno != ENOENT){
3067
perror_plus("rmdir");
2204
struct dirent *direntry = NULL;
2205
int numentries = scandir(tempdir, &direntries, notdotentries,
2207
if (numentries > 0){
2208
for(int i = 0; i < numentries; i++){
2209
direntry = direntries[i];
2210
char *fullname = NULL;
2211
ret = asprintf(&fullname, "%s/%s", tempdir,
2214
perror_plus("asprintf");
2217
ret = remove(fullname);
2219
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname, strerror(errno));
2225
/* need to clean even if 0 because man page doesn't specify */
2227
if (numentries == -1){
2228
perror_plus("scandir");
2230
ret = rmdir(tempdir);
2231
if(ret == -1 and errno != ENOENT){
2232
perror_plus("rmdir");