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#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
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getuid(), getgid(), seteuid(),
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setgid(), pause(), _exit() */
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#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
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#include <iso646.h> /* not, or, and */
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#include <argp.h> /* struct argp_option, error_t, struct
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EX_NOHOST, EX_IOERR, EX_PROTOCOL */
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#include <sys/wait.h> /* waitpid(), WIFEXITED(),
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WEXITSTATUS(), WTERMSIG() */
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#include <grp.h> /* setgroups() */
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#include <sys/klog.h> /* klogctl() */
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/* Function to use when printing errors */
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void perror_plus(const char *print_text){
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fprintf(stderr, "Mandos plugin %s: ",
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program_invocation_short_name);
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perror(print_text);
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__attribute__((format (gnu_printf, 2, 3)))
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int fprintf_plus(FILE *stream, const char *format, ...){
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va_start (ap, format);
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/* Add server to set of servers to retry periodically */
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bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
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int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
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207
server *new_server = malloc(sizeof(server));
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if(new_server == NULL){
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perror_plus("malloc");
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*new_server = (server){ .ip = strdup(ip),
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avahi_simple_poll_quit(mc.simple_poll);
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if(not add_server(ip, port, interface,
1037
avahi_proto_to_af(proto))){
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fprintf_plus(stderr, "Failed to add server \"%s\" to server"
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ret = add_server(ip, port, interface,
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avahi_proto_to_af(proto));
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pid_t hook_pid = fork();
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if(hook_pid == 0){
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/* Raise privileges */
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perror_plus("seteuid");
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/* Raise privileges even more */
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perror_plus("setuid");
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perror_plus("setgid");
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/* Reset supplementary groups */
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ret = setgroups(0, NULL);
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perror_plus("setgroups");
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dup2(devnull, STDIN_FILENO);
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close(devnull);
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dup2(STDERR_FILENO, STDOUT_FILENO);
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1408
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
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perror_plus("setenv");
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ret = setenv("DEVICE", interface, 1);
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perror_plus("setenv");
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ret = setenv("VERBOSE", debug ? "1" : "0", 1);
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perror_plus("setenv");
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1423
ret = setenv("MODE", mode, 1);
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1425
perror_plus("setenv");
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1428
char *delaystring;
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ret = asprintf(&delaystring, "%f", delay);
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perror_plus("asprintf");
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1434
ret = setenv("DELAY", delaystring, 1);
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1436
free(delaystring);
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perror_plus("setenv");
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free(delaystring);
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if(execl(fullname, direntry->d_name, mode, NULL) == -1){
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perror_plus("execl");
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_exit(EXIT_FAILURE);
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ret = execl(fullname, direntry->d_name, mode, NULL);
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perror_plus("execl");
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if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
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argp_state_help(state, state->out_stream,
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ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
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case 'V': /* --version */
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fprintf_plus(state->out_stream,
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"Mandos plugin mandos-client: ");
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fprintf_plus(state->out_stream, "%s\n", argp_program_version);
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exit(argp_err_exit_status);
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/* Work around Debian bug #633582:
1714
1678
<http://bugs.debian.org/633582> */
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/* Re-raise priviliges */
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ret = seteuid(0);
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perror_plus("seteuid");
1724
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1725
int seckey_fd = open(seckey, O_RDONLY);
1726
if(seckey_fd == -1){
1727
perror_plus("open");
1729
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1731
perror_plus("fstat");
1733
if(S_ISREG(st.st_mode)
1734
and st.st_uid == 0 and st.st_gid == 0){
1735
ret = fchown(seckey_fd, uid, gid);
1737
perror_plus("fchown");
1741
TEMP_FAILURE_RETRY(close(seckey_fd));
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if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1746
int pubkey_fd = open(pubkey, O_RDONLY);
1747
if(pubkey_fd == -1){
1748
perror_plus("open");
1750
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
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perror_plus("fstat");
1754
if(S_ISREG(st.st_mode)
1755
and st.st_uid == 0 and st.st_gid == 0){
1756
ret = fchown(pubkey_fd, uid, gid);
1758
perror_plus("fchown");
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TEMP_FAILURE_RETRY(close(pubkey_fd));
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if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1689
int seckey_fd = open(seckey, O_RDONLY);
1690
if(seckey_fd == -1){
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perror_plus("open");
1693
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1695
perror_plus("fstat");
1697
if(S_ISREG(st.st_mode)
1698
and st.st_uid == 0 and st.st_gid == 0){
1699
ret = fchown(seckey_fd, uid, gid);
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perror_plus("fchown");
1705
TEMP_FAILURE_RETRY(close(seckey_fd));
1709
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1710
int pubkey_fd = open(pubkey, O_RDONLY);
1711
if(pubkey_fd == -1){
1712
perror_plus("open");
1714
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1716
perror_plus("fstat");
1718
if(S_ISREG(st.st_mode)
1719
and st.st_uid == 0 and st.st_gid == 0){
1720
ret = fchown(pubkey_fd, uid, gid);
1722
perror_plus("fchown");
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TEMP_FAILURE_RETRY(close(pubkey_fd));
1730
/* Lower privileges */
1734
perror_plus("seteuid");
1738
/* Run network hooks */
1741
/* Re-raise priviliges */
1745
perror_plus("seteuid");
1748
if(not run_network_hooks("start", interface, delay)){
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/* Lower privileges */
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ret = seteuid(uid);
2234
/* Run network hooks */
2235
run_network_hooks("stop", interface, delay);
2237
2215
/* Re-raise priviliges */
2242
perror_plus("seteuid");
2221
perror_plus("seteuid");
2224
/* Run network hooks */
2225
if(not run_network_hooks("stop", interface, delay)){
2245
2229
/* Take down the network interface */