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() */
92
93
#include <sys/klog.h> /* klogctl() */
170
171
/* Function to use when printing errors */
171
172
void perror_plus(const char *print_text){
172
174
fprintf(stderr, "Mandos plugin %s: ",
173
175
program_invocation_short_name);
174
177
perror(print_text);
180
__attribute__((format (gnu_printf, 2, 3)))
177
181
int fprintf_plus(FILE *stream, const char *format, ...){
179
183
va_start (ap, format);
203
207
/* Add server to set of servers to retry periodically */
204
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
208
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
207
211
server *new_server = malloc(sizeof(server));
208
212
if(new_server == NULL){
209
213
perror_plus("malloc");
212
216
*new_server = (server){ .ip = strdup(ip),
1030
1034
avahi_simple_poll_quit(mc.simple_poll);
1032
ret = add_server(ip, port, interface,
1033
avahi_proto_to_af(proto));
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"
1406
1413
pid_t hook_pid = fork();
1407
1414
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");
1409
1440
dup2(devnull, STDIN_FILENO);
1410
1441
close(devnull);
1411
1442
dup2(STDERR_FILENO, STDOUT_FILENO);
1442
1473
_exit(EX_OSERR);
1444
1475
free(delaystring);
1445
ret = execl(fullname, direntry->d_name, mode, NULL);
1446
perror_plus("execl");
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);
1449
1489
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1569
1609
{ .name = "retry", .key = 132,
1570
1610
.arg = "SECONDS",
1571
.doc = "Retry interval used when denied by the mandos server",
1611
.doc = "Retry interval used when denied by the Mandos server",
1573
1613
{ .name = "network-hook-dir", .key = 133,
1646
1686
argp_state_help(state, state->out_stream,
1647
1687
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1648
1688
case 'V': /* --version */
1649
fprintf_plus(state->out_stream,
1650
"Mandos plugin mandos-client: ");
1651
1689
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1652
1690
exit(argp_err_exit_status);
1682
1720
/* Work around Debian bug #633582:
1683
1721
<http://bugs.debian.org/633582> */
1686
1723
/* Re-raise priviliges */
1688
1725
ret = seteuid(0);
1690
1727
perror_plus("seteuid");
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)){
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));
1757
1773
/* Lower privileges */
1759
1775
ret = seteuid(uid);
2241
/* Run network hooks */
2242
run_network_hooks("stop", interface, delay);
2220
2244
/* Re-raise priviliges */
2226
perror_plus("seteuid");
2249
perror_plus("seteuid");
2230
/* Run network hooks */
2231
run_network_hooks("stop", interface, delay);
2233
2252
/* Take down the network interface */
2234
2253
if(take_down_interface and geteuid() == 0){
2235
2254
ret = ioctl(sd, SIOCGIFFLAGS, &network);