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- Committer: Teddy Hogeborn
- Date: 2016-02-29 22:51:57 UTC
- mfrom: (237.4.65 release)
- Revision ID: teddy@recompile.se-20160229225157-if6c17o8ziwncvro
Merge from release branch.
added
removed
plugins.d/mandos-client.c
817
817
818
818
/* Set effective uid to 0, return errno */
819
819
__attribute__((warn_unused_result))
820
int raise_privileges(void){
821
int old_errno = errno;
822
int ret = 0;
820
error_t raise_privileges(void){
821
error_t old_errno = errno;
822
error_t ret_errno = 0;
823
823
if(seteuid(0) == -1){
824
ret = errno;
824
ret_errno = errno;
825
825
}
826
826
errno = old_errno;
827
return ret;
827
return ret_errno;
828
828
}
829
829
830
830
/* Set effective and real user ID to 0. Return errno. */
831
831
__attribute__((warn_unused_result))
832
int raise_privileges_permanently(void){
833
int old_errno = errno;
834
int ret = raise_privileges();
835
if(ret != 0){
832
error_t raise_privileges_permanently(void){
833
error_t old_errno = errno;
834
error_t ret_errno = raise_privileges();
835
if(ret_errno != 0){
836
836
errno = old_errno;
837
return ret;
837
return ret_errno;
838
838
}
839
839
if(setuid(0) == -1){
840
ret = errno;
840
ret_errno = errno;
841
841
}
842
842
errno = old_errno;
843
return ret;
843
return ret_errno;
844
844
}
845
845
846
846
/* Set effective user ID to unprivileged saved user ID */
847
847
__attribute__((warn_unused_result))
848
int lower_privileges(void){
849
int old_errno = errno;
850
int ret = 0;
848
error_t lower_privileges(void){
849
error_t old_errno = errno;
850
error_t ret_errno = 0;
851
851
if(seteuid(uid) == -1){
852
ret = errno;
852
ret_errno = errno;
853
853
}
854
854
errno = old_errno;
855
return ret;
855
return ret_errno;
856
856
}
857
857
858
858
/* Lower privileges permanently */
859
859
__attribute__((warn_unused_result))
860
int lower_privileges_permanently(void){
861
int old_errno = errno;
862
int ret = 0;
860
error_t lower_privileges_permanently(void){
861
error_t old_errno = errno;
862
error_t ret_errno = 0;
863
863
if(setuid(uid) == -1){
864
ret = errno;
864
ret_errno = errno;
865
865
}
866
866
errno = old_errno;
867
return ret;
867
return ret_errno;
868
868
}
869
869
870
870
/* Helper function to add_local_route() and delete_local_route() */
1623
1623
__attribute__((nonnull, warn_unused_result))
1624
1624
bool get_flags(const char *ifname, struct ifreq *ifr){
1625
1625
int ret;
1626
int old_errno;
1626
error_t ret_errno;
1627
1627
1628
1628
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1629
1629
if(s < 0){
1630
old_errno = errno;
1630
ret_errno = errno;
1631
1631
perror_plus("socket");
1632
errno = old_errno;
1632
errno = ret_errno;
1633
1633
return false;
1634
1634
}
1635
1635
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1637
1637
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1638
1638
if(ret == -1){
1639
1639
if(debug){
1640
old_errno = errno;
1640
ret_errno = errno;
1641
1641
perror_plus("ioctl SIOCGIFFLAGS");
1642
errno = old_errno;
1642
errno = ret_errno;
1643
1643
}
1644
1644
return false;
1645
1645
}
2071
2071
}
2072
2072
2073
2073
__attribute__((nonnull, warn_unused_result))
2074
int bring_up_interface(const char *const interface,
2075
const float delay){
2076
int old_errno = errno;
2074
error_t bring_up_interface(const char *const interface,
2075
const float delay){
2076
error_t old_errno = errno;
2077
2077
int ret;
2078
2078
struct ifreq network;
2079
2079
unsigned int if_index = if_nametoindex(interface);
2089
2089
}
2090
2090
2091
2091
if(not interface_is_up(interface)){
2092
int ret_errno = 0;
2093
int ioctl_errno = 0;
2092
error_t ret_errno = 0, ioctl_errno = 0;
2094
2093
if(not get_flags(interface, &network)){
2095
2094
ret_errno = errno;
2096
2095
fprintf_plus(stderr, "Failed to get flags for interface "
2199
2198
}
2200
2199
2201
2200
__attribute__((nonnull, warn_unused_result))
2202
int take_down_interface(const char *const interface){
2203
int old_errno = errno;
2201
error_t take_down_interface(const char *const interface){
2202
error_t old_errno = errno;
2204
2203
struct ifreq network;
2205
2204
unsigned int if_index = if_nametoindex(interface);
2206
2205
if(if_index == 0){
2209
2208
return ENXIO;
2210
2209
}
2211
2210
if(interface_is_up(interface)){
2212
int ret_errno = 0;
2213
int ioctl_errno = 0;
2211
error_t ret_errno = 0, ioctl_errno = 0;
2214
2212
if(not get_flags(interface, &network) and debug){
2215
2213
ret_errno = errno;
2216
2214
fprintf_plus(stderr, "Failed to get flags for interface "
2466
2464
.args_doc = "",
2467
2465
.doc = "Mandos client -- Get and decrypt"
2468
2466
" passwords from a Mandos server" };
2469
ret_errno = argp_parse(&argp, argc, argv,
2470
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2471
switch(ret_errno){
2467
ret = argp_parse(&argp, argc, argv,
2468
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2469
switch(ret){
2472
2470
case 0:
2473
2471
break;
2474
2472
case ENOMEM:
2475
2473
default:
2476
errno = ret_errno;
2474
errno = ret;
2477
2475
perror_plus("argp_parse");
2478
2476
exitcode = EX_OSERR;
2479
2477
goto end;
2488
2486
<http://bugs.debian.org/633582> */
2489
2487
2490
2488
/* Re-raise privileges */
2491
ret = raise_privileges();
2492
if(ret != 0){
2493
errno = ret;
2489
ret_errno = raise_privileges();
2490
if(ret_errno != 0){
2491
errno = ret_errno;
2494
2492
perror_plus("Failed to raise privileges");
2495
2493
} else {
2496
2494
struct stat st;
2560
2558
}
2561
2559
2562
2560
/* Lower privileges */
2563
ret = lower_privileges();
2564
if(ret != 0){
2565
errno = ret;
2561
ret_errno = lower_privileges();
2562
if(ret_errno != 0){
2563
errno = ret_errno;
2566
2564
perror_plus("Failed to lower privileges");
2567
2565
}
2568
2566
}
2896
2894
2897
2895
/* Allocate a new server */
2898
2896
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2899
&config, NULL, NULL, &ret);
2897
&config, NULL, NULL, &ret_errno);
2900
2898
2901
2899
/* Free the Avahi configuration data */
2902
2900
avahi_server_config_free(&config);
2905
2903
/* Check if creating the Avahi server object succeeded */
2906
2904
if(mc.server == NULL){
2907
2905
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2908
avahi_strerror(ret));
2906
avahi_strerror(ret_errno));
2909
2907
exitcode = EX_UNAVAILABLE;
2910
2908
goto end;
2911
2909
}
2991
2989
2992
2990
/* Re-raise privileges */
2993
2991
{
2994
ret = raise_privileges();
2995
if(ret != 0){
2996
errno = ret;
2992
ret_errno = raise_privileges();
2993
if(ret_errno != 0){
2994
errno = ret_errno;
2997
2995
perror_plus("Failed to raise privileges");
2998
2996
} else {
2999
2997
3007
3005
while((interface=argz_next(interfaces_to_take_down,
3008
3006
interfaces_to_take_down_size,
3009
3007
interface))){
3010
ret = take_down_interface(interface);
3011
if(ret != 0){
3012
errno = ret;
3008
ret_errno = take_down_interface(interface);
3009
if(ret_errno != 0){
3010
errno = ret_errno;
3013
3011
perror_plus("Failed to take down interface");
3014
3012
}
3015
3013
}
3020
3018
}
3021
3019
}
3022
3020
3023
ret = lower_privileges_permanently();
3024
if(ret != 0){
3025
errno = ret;
3021
ret_errno = lower_privileges_permanently();
3022
if(ret_errno != 0){
3023
errno = ret_errno;
3026
3024
perror_plus("Failed to lower privileges permanently");
3027
3025
}
3028
3026
}
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Version: 2.0.2.dev0