87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
93
92
#include <sys/klog.h> /* klogctl() */
171
170
/* Function to use when printing errors */
172
171
void perror_plus(const char *print_text){
174
172
fprintf(stderr, "Mandos plugin %s: ",
175
173
program_invocation_short_name);
177
174
perror(print_text);
180
__attribute__((format (gnu_printf, 2, 3)))
181
177
int fprintf_plus(FILE *stream, const char *format, ...){
183
179
va_start (ap, format);
207
203
/* Add server to set of servers to retry periodically */
208
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
204
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
211
207
server *new_server = malloc(sizeof(server));
212
208
if(new_server == NULL){
213
209
perror_plus("malloc");
216
212
*new_server = (server){ .ip = strdup(ip),
1034
1030
avahi_simple_poll_quit(mc.simple_poll);
1036
if(not add_server(ip, port, interface,
1037
avahi_proto_to_af(proto))){
1038
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1032
ret = add_server(ip, port, interface,
1033
avahi_proto_to_af(proto));
1413
1406
pid_t hook_pid = fork();
1414
1407
if(hook_pid == 0){
1416
/* Raise privileges */
1420
perror_plus("seteuid");
1422
/* Raise privileges even more */
1426
perror_plus("setuid");
1432
perror_plus("setgid");
1434
/* Reset supplementary groups */
1436
ret = setgroups(0, NULL);
1438
perror_plus("setgroups");
1440
1409
dup2(devnull, STDIN_FILENO);
1441
1410
close(devnull);
1442
1411
dup2(STDERR_FILENO, STDOUT_FILENO);
1473
1442
_exit(EX_OSERR);
1475
1444
free(delaystring);
1476
if(connect_to != NULL){
1477
ret = setenv("CONNECT", connect_to, 1);
1479
perror_plus("setenv");
1483
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1484
perror_plus("execl");
1485
_exit(EXIT_FAILURE);
1445
ret = execl(fullname, direntry->d_name, mode, NULL);
1446
perror_plus("execl");
1489
1449
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1609
1569
{ .name = "retry", .key = 132,
1610
1570
.arg = "SECONDS",
1611
.doc = "Retry interval used when denied by the Mandos server",
1571
.doc = "Retry interval used when denied by the mandos server",
1613
1573
{ .name = "network-hook-dir", .key = 133,
1686
1646
argp_state_help(state, state->out_stream,
1687
1647
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1688
1648
case 'V': /* --version */
1649
fprintf_plus(state->out_stream,
1650
"Mandos plugin mandos-client: ");
1689
1651
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1690
1652
exit(argp_err_exit_status);
1720
1682
/* Work around Debian bug #633582:
1721
1683
<http://bugs.debian.org/633582> */
1723
1686
/* Re-raise priviliges */
1725
1688
ret = seteuid(0);
1727
1690
perror_plus("seteuid");
1731
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1732
int seckey_fd = open(seckey, O_RDONLY);
1733
if(seckey_fd == -1){
1734
perror_plus("open");
1736
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1738
perror_plus("fstat");
1740
if(S_ISREG(st.st_mode)
1741
and st.st_uid == 0 and st.st_gid == 0){
1742
ret = fchown(seckey_fd, uid, gid);
1744
perror_plus("fchown");
1748
TEMP_FAILURE_RETRY(close(seckey_fd));
1752
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1753
int pubkey_fd = open(pubkey, O_RDONLY);
1754
if(pubkey_fd == -1){
1755
perror_plus("open");
1757
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1759
perror_plus("fstat");
1761
if(S_ISREG(st.st_mode)
1762
and st.st_uid == 0 and st.st_gid == 0){
1763
ret = fchown(pubkey_fd, uid, gid);
1765
perror_plus("fchown");
1769
TEMP_FAILURE_RETRY(close(pubkey_fd));
1693
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1694
int seckey_fd = open(seckey, O_RDONLY);
1695
if(seckey_fd == -1){
1696
perror_plus("open");
1698
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1700
perror_plus("fstat");
1702
if(S_ISREG(st.st_mode)
1703
and st.st_uid == 0 and st.st_gid == 0){
1704
ret = fchown(seckey_fd, uid, gid);
1706
perror_plus("fchown");
1710
TEMP_FAILURE_RETRY(close(seckey_fd));
1714
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1715
int pubkey_fd = open(pubkey, O_RDONLY);
1716
if(pubkey_fd == -1){
1717
perror_plus("open");
1719
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1721
perror_plus("fstat");
1723
if(S_ISREG(st.st_mode)
1724
and st.st_uid == 0 and st.st_gid == 0){
1725
ret = fchown(pubkey_fd, uid, gid);
1727
perror_plus("fchown");
1731
TEMP_FAILURE_RETRY(close(pubkey_fd));
1735
/* Lower privileges */
1739
perror_plus("seteuid");
1743
/* Run network hooks */
1746
/* Re-raise priviliges */
1750
perror_plus("seteuid");
1753
if(not run_network_hooks("start", interface, delay)){
1773
1757
/* Lower privileges */
1775
1759
ret = seteuid(uid);
2241
/* Run network hooks */
2242
run_network_hooks("stop", interface, delay);
2244
2220
/* Re-raise priviliges */
2249
perror_plus("seteuid");
2226
perror_plus("seteuid");
2230
/* Run network hooks */
2231
run_network_hooks("stop", interface, delay);
2252
2233
/* Take down the network interface */
2253
2234
if(take_down_interface and geteuid() == 0){
2254
2235
ret = ioctl(sd, SIOCGIFFLAGS, &network);