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> /* 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,
571
536
/* GnuTLS server initialization */
572
ret = gnutls_dh_params_init(&mc->dh_params);
537
ret = gnutls_dh_params_init(&mc.dh_params);
573
538
if(ret != GNUTLS_E_SUCCESS){
574
539
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
575
540
" initialization: %s\n",
576
541
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);
544
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
545
if(ret != GNUTLS_E_SUCCESS){
546
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
547
safer_gnutls_strerror(ret));
551
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
757
gnutls_certificate_free_credentials(mc->cred);
557
gnutls_certificate_free_credentials(mc.cred);
758
558
gnutls_global_deinit();
759
gnutls_dh_params_deinit(mc->dh_params);
559
gnutls_dh_params_deinit(mc.dh_params);
763
__attribute__((nonnull, warn_unused_result))
764
static int init_gnutls_session(gnutls_session_t *session,
563
static int init_gnutls_session(gnutls_session_t *session){
767
565
/* GnuTLS session creation */
820
620
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
821
621
__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
623
/* Called when a Mandos server is found */
1042
__attribute__((nonnull, warn_unused_result))
1043
624
static int start_mandos_communication(const char *ip, in_port_t port,
1044
625
AvahiIfIndex if_index,
1045
int af, mandos_context *mc){
1046
627
int ret, tcp_sd = -1;
1048
struct sockaddr_storage to;
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
1049
633
char *buffer = NULL;
1050
634
char *decrypted_buffer = NULL;
1051
635
size_t buffer_length = 0;
1190
743
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
1191
744
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");
747
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
750
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
754
perror_plus("inet_ntop");
756
if(strcmp(addrstr, ip) != 0){
757
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
768
ret = connect(tcp_sd, &to.in6, sizeof(to));
770
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
773
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
775
perror_plus("connect");
1274
786
const char *out = mandos_protocol_version;
1888
1383
ret = avahi_simple_poll_iterate(s, (int)block_time);
1891
if(ret > 0 or errno != EINTR){
1386
if (ret > 0 or errno != EINTR){
1892
1387
return (ret != 1) ? ret : 0;
1898
__attribute__((nonnull))
1899
void run_network_hooks(const char *mode, const char *interface,
1393
/* Set effective uid to 0, return errno */
1394
error_t raise_privileges(void){
1395
error_t old_errno = errno;
1396
error_t ret_errno = 0;
1397
if(seteuid(0) == -1){
1399
perror_plus("seteuid");
1405
/* Set effective and real user ID to 0. Return errno. */
1406
error_t raise_privileges_permanently(void){
1407
error_t old_errno = errno;
1408
error_t ret_errno = raise_privileges();
1413
if(setuid(0) == -1){
1415
perror_plus("seteuid");
1421
/* Set effective user ID to unprivileged saved user ID */
1422
error_t lower_privileges(void){
1423
error_t old_errno = errno;
1424
error_t ret_errno = 0;
1425
if(seteuid(uid) == -1){
1427
perror_plus("seteuid");
1433
/* Lower privileges permanently */
1434
error_t lower_privileges_permanently(void){
1435
error_t old_errno = errno;
1436
error_t ret_errno = 0;
1437
if(setuid(uid) == -1){
1439
perror_plus("setuid");
1445
bool run_network_hooks(const char *mode, const char *interface,
1900
1446
const float delay){
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");
1918
#if __GLIBC_PREREQ(2, 15)
1919
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1920
runnable_hook, alphasort);
1921
#else /* not __GLIBC_PREREQ(2, 15) */
1922
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1924
#endif /* not __GLIBC_PREREQ(2, 15) */
1925
#else /* not __GLIBC__ */
1926
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1928
#endif /* not __GLIBC__ */
1447
struct dirent **direntries;
1448
struct dirent *direntry;
1450
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1929
1452
if(numhooks == -1){
1930
1453
perror_plus("scandir");
1933
struct dirent *direntry;
1935
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1937
perror_plus("open(\"/dev/null\", O_RDONLY)");
1940
for(int i = 0; i < numhooks; i++){
1941
direntry = direntries[i];
1943
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1946
pid_t hook_pid = fork();
1949
/* Raise privileges */
1950
errno = raise_privileges_permanently();
1952
perror_plus("Failed to raise privileges");
1959
perror_plus("setgid");
1962
/* Reset supplementary groups */
1964
ret = setgroups(0, NULL);
1966
perror_plus("setgroups");
1969
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1971
perror_plus("setenv");
1974
ret = setenv("DEVICE", interface, 1);
1976
perror_plus("setenv");
1979
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1981
perror_plus("setenv");
1984
ret = setenv("MODE", mode, 1);
1986
perror_plus("setenv");
1990
ret = asprintf(&delaystring, "%f", (double)delay);
1455
int devnull = open("/dev/null", O_RDONLY);
1456
for(int i = 0; i < numhooks; i++){
1457
direntry = direntries[i];
1458
char *fullname = NULL;
1459
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1992
1461
perror_plus("asprintf");
1995
ret = setenv("DELAY", delaystring, 1);
1465
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1468
pid_t hook_pid = fork();
1471
/* Raise privileges */
1472
raise_privileges_permanently();
1477
perror_plus("setgid");
1479
/* Reset supplementary groups */
1481
ret = setgroups(0, NULL);
1483
perror_plus("setgroups");
1485
dup2(devnull, STDIN_FILENO);
1487
dup2(STDERR_FILENO, STDOUT_FILENO);
1488
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1490
perror_plus("setenv");
1493
ret = setenv("DEVICE", interface, 1);
1495
perror_plus("setenv");
1498
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1500
perror_plus("setenv");
1503
ret = setenv("MODE", mode, 1);
1505
perror_plus("setenv");
1509
ret = asprintf(&delaystring, "%f", delay);
1511
perror_plus("asprintf");
1514
ret = setenv("DELAY", delaystring, 1);
1517
perror_plus("setenv");
1997
1520
free(delaystring);
1998
perror_plus("setenv");
2002
if(connect_to != NULL){
2003
ret = setenv("CONNECT", connect_to, 1);
2005
perror_plus("setenv");
2009
int hook_fd = (int)TEMP_FAILURE_RETRY(openat(hookdir_fd,
2013
perror_plus("openat");
2014
_exit(EXIT_FAILURE);
2016
if(close(hookdir_fd) == -1){
2017
perror_plus("close");
2018
_exit(EXIT_FAILURE);
2020
ret = dup2(devnull, STDIN_FILENO);
2022
perror_plus("dup2(devnull, STDIN_FILENO)");
2025
ret = close(devnull);
2027
perror_plus("close");
2030
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
2032
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
2035
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
2037
perror_plus("fexecve");
2038
_exit(EXIT_FAILURE);
2042
perror_plus("fork");
2047
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
2048
perror_plus("waitpid");
2052
if(WIFEXITED(status)){
2053
if(WEXITSTATUS(status) != 0){
2054
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
2055
" with status %d\n", direntry->d_name,
2056
WEXITSTATUS(status));
2060
} else if(WIFSIGNALED(status)){
2061
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
2062
" signal %d\n", direntry->d_name,
1521
if(connect_to != NULL){
1522
ret = setenv("CONNECT", connect_to, 1);
1524
perror_plus("setenv");
1528
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1529
perror_plus("execl");
1530
_exit(EXIT_FAILURE);
2067
fprintf_plus(stderr, "Warning: network hook \"%s\""
2068
" crashed\n", direntry->d_name);
2074
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
2080
if(close(hookdir_fd) == -1){
2081
perror_plus("close");
1534
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1535
perror_plus("waitpid");
1539
if(WIFEXITED(status)){
1540
if(WEXITSTATUS(status) != 0){
1541
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1542
" with status %d\n", direntry->d_name,
1543
WEXITSTATUS(status));
1547
} else if(WIFSIGNALED(status)){
1548
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1549
" signal %d\n", direntry->d_name,
1554
fprintf_plus(stderr, "Warning: network hook \"%s\""
1555
" crashed\n", direntry->d_name);
1562
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
2088
__attribute__((nonnull, warn_unused_result))
2089
1571
error_t bring_up_interface(const char *const interface,
2090
1572
const float delay){
2091
1574
error_t old_errno = errno;
1575
error_t ret_errno = 0;
1576
int ret, ret_setflags;
2093
1577
struct ifreq network;
2094
1578
unsigned int if_index = if_nametoindex(interface);
2095
1579
if(if_index == 0){
2553
if(dh_params_file != NULL
2554
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2555
int dhparams_fd = open(dh_params_file, O_RDONLY);
2556
if(dhparams_fd == -1){
2557
perror_plus("open");
2559
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2561
perror_plus("fstat");
2563
if(S_ISREG(st.st_mode)
2564
and st.st_uid == 0 and st.st_gid == 0){
2565
ret = fchown(dhparams_fd, uid, gid);
2567
perror_plus("fchown");
1986
TEMP_FAILURE_RETRY(close(pubkey_fd));
2575
1990
/* Lower privileges */
2576
ret_errno = lower_privileges();
2579
perror_plus("Failed to lower privileges");
1994
perror_plus("seteuid");
2584
/* Remove invalid interface names (except "none") */
1999
/* Remove empty interface names */
2586
2001
char *interface = NULL;
2587
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2002
while((interface = argz_next(interfaces, interfaces_size,
2589
if(strcmp(interface, "none") != 0
2590
and if_nametoindex(interface) == 0){
2591
if(interface[0] != '\0'){
2004
if(if_nametoindex(interface) == 0){
2005
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2592
2006
fprintf_plus(stderr, "Not using nonexisting interface"
2593
2007
" \"%s\"\n", interface);
2595
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2009
argz_delete(&interfaces, &interfaces_size, interface);
2596
2010
interface = NULL;
2695
2109
/* If no interfaces were specified, make a list */
2696
if(mc.interfaces == NULL){
2697
struct dirent **direntries = NULL;
2110
if(interfaces == NULL){
2111
struct dirent **direntries;
2698
2112
/* Look for any good interfaces */
2699
2113
ret = scandir(sys_class_net, &direntries, good_interface,
2702
2116
/* Add all found interfaces to interfaces list */
2703
2117
for(int i = 0; i < ret; ++i){
2704
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2118
ret_errno = argz_add(&interfaces, &interfaces_size,
2705
2119
direntries[i]->d_name);
2706
2120
if(ret_errno != 0){
2708
2121
perror_plus("argz_add");
2709
free(direntries[i]);
2713
2125
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2714
2126
direntries[i]->d_name);
2716
free(direntries[i]);
2718
2129
free(direntries);
2723
2132
fprintf_plus(stderr, "Could not find a network interface\n");
2724
2133
exitcode = EXIT_FAILURE;
2729
/* Bring up interfaces which are down, and remove any "none"s */
2138
/* If we only got one interface, explicitly use only that one */
2139
if(argz_count(interfaces, interfaces_size) == 1){
2141
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2144
if_index = (AvahiIfIndex)if_nametoindex(interfaces);
2147
/* Bring up interfaces which are down */
2148
if(not (argz_count(interfaces, interfaces_size) == 1
2149
and strcmp(interfaces, "none") == 0)){
2731
2150
char *interface = NULL;
2732
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2151
while((interface = argz_next(interfaces, interfaces_size,
2734
/* If interface name is "none", stop bringing up interfaces.
2735
Also remove all instances of "none" from the list */
2736
if(strcmp(interface, "none") == 0){
2737
argz_delete(&mc.interfaces, &mc.interfaces_size,
2740
while((interface = argz_next(mc.interfaces,
2741
mc.interfaces_size, interface))){
2742
if(strcmp(interface, "none") == 0){
2743
argz_delete(&mc.interfaces, &mc.interfaces_size,
2750
2153
bool interface_was_up = interface_is_up(interface);
2751
errno = bring_up_interface(interface, delay);
2154
ret = bring_up_interface(interface, delay);
2752
2155
if(not interface_was_up){
2754
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2755
" %s\n", interface, strerror(errno));
2158
perror_plus("Failed to bring up interface");
2757
errno = argz_add(&interfaces_to_take_down,
2758
&interfaces_to_take_down_size,
2761
perror_plus("argz_add");
2160
ret_errno = argz_add(&interfaces_to_take_down,
2161
&interfaces_to_take_down_size,
2168
interfaces_size = 0;
2766
2169
if(debug and (interfaces_to_take_down == NULL)){
2767
2170
fprintf_plus(stderr, "No interfaces were brought up\n");
2771
/* If we only got one interface, explicitly use only that one */
2772
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2774
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2777
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2784
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
2178
ret = init_gnutls_global(pubkey, seckey);
2786
2180
fprintf_plus(stderr, "init_gnutls_global failed\n");
2787
2181
exitcode = EX_UNAVAILABLE;
2990
2373
mc.current_server->prev->next = NULL;
2991
2374
while(mc.current_server != NULL){
2992
2375
server *next = mc.current_server->next;
2994
#pragma GCC diagnostic push
2995
#pragma GCC diagnostic ignored "-Wcast-qual"
2997
free((char *)(mc.current_server->ip));
2999
#pragma GCC diagnostic pop
3001
2376
free(mc.current_server);
3002
2377
mc.current_server = next;
3006
/* Re-raise privileges */
2381
/* Re-raise priviliges */
3008
ret_errno = raise_privileges();
3011
perror_plus("Failed to raise privileges");
3014
/* Run network hooks */
3015
run_network_hooks("stop", interfaces_hooks != NULL ?
3016
interfaces_hooks : "", delay);
3018
/* Take down the network interfaces which were brought up */
3020
char *interface = NULL;
3021
while((interface=argz_next(interfaces_to_take_down,
3022
interfaces_to_take_down_size,
3024
ret_errno = take_down_interface(interface);
3027
perror_plus("Failed to take down interface");
3030
if(debug and (interfaces_to_take_down == NULL)){
3031
fprintf_plus(stderr, "No interfaces needed to be taken"
3037
ret_errno = lower_privileges_permanently();
3040
perror_plus("Failed to lower privileges permanently");
2385
/* Run network hooks */
2386
run_network_hooks("stop", interfaces_hooks, delay);
2388
/* Take down the network interfaces which were brought up */
2390
char *interface = NULL;
2391
while((interface=argz_next(interfaces_to_take_down,
2392
interfaces_to_take_down_size,
2394
ret_errno = take_down_interface(interface);
2397
perror_plus("Failed to take down interface");
2400
if(debug and (interfaces_to_take_down == NULL)){
2401
fprintf_plus(stderr, "No interfaces needed to be taken"
2406
lower_privileges_permanently();
3044
2409
free(interfaces_to_take_down);
3045
2410
free(interfaces_hooks);
3047
2412
/* Removes the GPGME temp directory and all files inside */
3048
if(tempdir != NULL){
2413
if(tempdir_created){
3049
2414
struct dirent **direntries = NULL;
3050
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3054
if(tempdir_fd == -1){
3055
perror_plus("open");
3058
#if __GLIBC_PREREQ(2, 15)
3059
int numentries = scandirat(tempdir_fd, ".", &direntries,
3060
notdotentries, alphasort);
3061
#else /* not __GLIBC_PREREQ(2, 15) */
3062
int numentries = scandir(tempdir, &direntries, notdotentries,
3064
#endif /* not __GLIBC_PREREQ(2, 15) */
3065
#else /* not __GLIBC__ */
3066
int numentries = scandir(tempdir, &direntries, notdotentries,
3068
#endif /* not __GLIBC__ */
3069
if(numentries >= 0){
3070
for(int i = 0; i < numentries; i++){
3071
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
3073
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3074
" \"%s\", 0): %s\n", tempdir,
3075
direntries[i]->d_name, strerror(errno));
3077
free(direntries[i]);
3080
/* need to clean even if 0 because man page doesn't specify */
3082
if(numentries == -1){
3083
perror_plus("scandir");
3085
ret = rmdir(tempdir);
3086
if(ret == -1 and errno != ENOENT){
3087
perror_plus("rmdir");
2415
struct dirent *direntry = NULL;
2416
int numentries = scandir(tempdir, &direntries, notdotentries,
2418
if (numentries > 0){
2419
for(int i = 0; i < numentries; i++){
2420
direntry = direntries[i];
2421
char *fullname = NULL;
2422
ret = asprintf(&fullname, "%s/%s", tempdir,
2425
perror_plus("asprintf");
2428
ret = remove(fullname);
2430
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2437
/* need to clean even if 0 because man page doesn't specify */
2439
if (numentries == -1){
2440
perror_plus("scandir");
2442
ret = rmdir(tempdir);
2443
if(ret == -1 and errno != ENOENT){
2444
perror_plus("rmdir");