#include "tincctl.h"
#include "top.h"
-#ifdef HAVE_MINGW
-#define mkdir(a, b) mkdir(a)
-#define SCRIPTEXTENSION ".bat"
-#else
-#define SCRIPTEXTENSION ""
-#endif
-
static char **orig_argv;
static int orig_argc;
bool tty = true;
bool confbasegiven = false;
bool netnamegiven = false;
-
-#ifdef HAVE_MINGW
-static struct WSAData wsa_state;
-#endif
+char *scriptinterpreter = NULL;
+char *scriptextension = "";
static struct option const long_options[] = {
{"config", required_argument, NULL, 'c'},
" del VARIABLE [VALUE] Remove VARIABLE [only ones with watching VALUE]\n"
" start [tincd options] Start tincd.\n"
" stop Stop tincd.\n"
- " restart Restart tincd.\n"
+ " restart [tincd options] Restart tincd.\n"
" reload Partially reload configuration of running tincd.\n"
" pid Show PID of currently running tincd.\n"
" generate-keys [bits] Generate new RSA and ECDSA public/private keypairs.\n"
return true;
}
+/* Open a file with the desired permissions, minus the umask.
+ Also, if we want to create an executable file, we call fchmod()
+ to set the executable bits. */
+
+FILE *fopenmask(const char *filename, const char *mode, mode_t perms) {
+ mode_t mask = umask(0);
+ perms &= ~mask;
+ umask(~perms);
+ FILE *f = fopen(filename, mode);
+#ifdef HAVE_FCHMOD
+ if((perms & 0444) && f)
+ fchmod(fileno(f), perms);
+#endif
+ umask(mask);
+ return f;
+}
+
static void disable_old_keys(const char *filename, const char *what) {
char tmpfile[PATH_MAX] = "";
char buf[1024];
snprintf(tmpfile, sizeof tmpfile, "%s.tmp", filename);
- w = fopen(tmpfile, "w");
+ struct stat st = {.st_mode = 0600};
+ fstat(fileno(r), &st);
+ w = fopenmask(tmpfile, "w", st.st_mode);
while(fgets(buf, sizeof buf, r)) {
if(!block && !strncmp(buf, "-----BEGIN ", 11)) {
unlink(tmpfile);
}
-static FILE *ask_and_open(const char *filename, const char *what, const char *mode, bool ask) {
+static FILE *ask_and_open(const char *filename, const char *what, const char *mode, bool ask, mode_t perms) {
FILE *r;
char *directory;
char buf[PATH_MAX];
filename = buf2;
}
- umask(0077); /* Disallow everything for group and other */
-
disable_old_keys(filename, what);
/* Open it first to keep the inode busy */
- r = fopen(filename, mode);
+ r = fopenmask(filename, mode, perms);
if(!r) {
fprintf(stderr, "Error opening file `%s': %s\n", filename, strerror(errno));
fprintf(stderr, "Done.\n");
xasprintf(&privname, "%s" SLASH "ecdsa_key.priv", confbase);
- f = ask_and_open(privname, "private ECDSA key", "a", ask);
+ f = ask_and_open(privname, "private ECDSA key", "a", ask, 0600);
free(privname);
if(!f)
return false;
-#ifdef HAVE_FCHMOD
- /* Make it unreadable for others. */
- fchmod(fileno(f), 0600);
-#endif
-
if(!ecdsa_write_pem_private_key(key, f)) {
fprintf(stderr, "Error writing private key!\n");
ecdsa_free(key);
else
xasprintf(&pubname, "%s" SLASH "ecdsa_key.pub", confbase);
- f = ask_and_open(pubname, "public ECDSA key", "a", ask);
+ f = ask_and_open(pubname, "public ECDSA key", "a", ask, 0666);
free(pubname);
if(!f)
fprintf(stderr, "Done.\n");
xasprintf(&privname, "%s" SLASH "rsa_key.priv", confbase);
- f = ask_and_open(privname, "private RSA key", "a", ask);
+ f = ask_and_open(privname, "private RSA key", "a", ask, 0600);
free(privname);
if(!f)
return false;
-#ifdef HAVE_FCHMOD
- /* Make it unreadable for others. */
- fchmod(fileno(f), 0600);
-#endif
-
if(!rsa_write_pem_private_key(key, f)) {
fprintf(stderr, "Error writing private key!\n");
fclose(f);
else
xasprintf(&pubname, "%s" SLASH "rsa_key.pub", confbase);
- f = ask_and_open(pubname, "public RSA key", "a", ask);
+ f = ask_and_open(pubname, "public RSA key", "a", ask, 0666);
free(pubname);
if(!f)
fclose(f);
-#ifdef HAVE_MINGW
- if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
- if(verbose)
- fprintf(stderr, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
- return false;
- }
-#endif
-
#ifndef HAVE_MINGW
struct sockaddr_un sa;
sa.sun_family = AF_UNIX;
free(nargv);
- int status = -1;
- if(waitpid(pid, &status, 0) != pid || !WIFEXITED(status) || WEXITSTATUS(status)) {
+ int status = -1, result;
+#ifdef SIGINT
+ signal(SIGINT, SIG_IGN);
+#endif
+ result = waitpid(pid, &status, 0);
+#ifdef SIGINT
+ signal(SIGINT, SIG_DFL);
+#endif
+
+ if(result != pid || !WIFEXITED(status) || WEXITSTATUS(status)) {
fprintf(stderr, "Error starting %s\n", c);
return 1;
}
}
static int cmd_restart(int argc, char *argv[]) {
- cmd_stop(argc, argv);
+ cmd_stop(1, argv);
return cmd_start(argc, argv);
}
{"IffOneQueue", VAR_SERVER},
{"Interface", VAR_SERVER},
{"KeyExpire", VAR_SERVER},
+ {"ListenAddress", VAR_SERVER | VAR_MULTIPLE},
{"LocalDiscovery", VAR_SERVER},
{"MACExpire", VAR_SERVER},
+ {"MaxConnectionBurst", VAR_SERVER},
{"MaxOutputBufferSize", VAR_SERVER},
{"MaxTimeout", VAR_SERVER},
{"Mode", VAR_SERVER | VAR_SAFE},
/* Some simple checks. */
bool found = false;
+ bool warnonremove = false;
for(int i = 0; variables[i].name; i++) {
if(strcasecmp(variables[i].name, variable))
return 1;
}
+ /* Change "add" into "set" for variables that do not allow multiple occurences.
+ Turn on warnings when it seems variables might be removed unintentionally. */
+
+ if(action == 1 && !(variables[i].type & VAR_MULTIPLE)) {
+ warnonremove = true;
+ action = 0;
+ } else if(action == 0 && (variables[i].type & VAR_MULTIPLE)) {
+ warnonremove = true;
+ }
+
break;
}
}
// Set
} else if(action == 0) {
+ // Warn if "set" was used for variables that can occur multiple times
+ if(warnonremove && strcasecmp(bvalue, value))
+ fprintf(stderr, "Warning: removing %s = %s\n", variable, bvalue);
+
// Already set? Delete the rest...
if(set)
continue;
+
// Otherwise, replace.
if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
if(action < 0 && !removed) {
remove(tmpfile);
fprintf(stderr, "No configuration variables deleted.\n");
- return *value;
+ return *value != 0;
}
// Replace the configuration file with the new one
return true;
}
+static bool try_bind(int port) {
+ struct addrinfo *ai = NULL;
+ struct addrinfo hint = {
+ .ai_flags = AI_PASSIVE,
+ .ai_family = AF_UNSPEC,
+ .ai_socktype = SOCK_STREAM,
+ .ai_protocol = IPPROTO_TCP,
+ };
+
+ char portstr[16];
+ snprintf(portstr, sizeof portstr, "%d", port);
+
+ if(getaddrinfo(NULL, portstr, &hint, &ai) || !ai)
+ return false;
+
+ while(ai) {
+ int fd = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
+ if(!fd)
+ return false;
+ int result = bind(fd, ai->ai_addr, ai->ai_addrlen);
+ closesocket(fd);
+ if(result)
+ return false;
+ ai = ai->ai_next;
+ }
+
+ return true;
+}
+
+int check_port(char *name) {
+ if(try_bind(655))
+ return 655;
+
+ fprintf(stderr, "Warning: could not bind to port 655. ");
+
+ for(int i = 0; i < 100; i++) {
+ int port = 0x1000 + (rand() & 0x7fff);
+ if(try_bind(port)) {
+ char *filename;
+ xasprintf(&filename, "%s" SLASH "hosts" SLASH "%s", confbase, name);
+ FILE *f = fopen(filename, "a");
+ free(filename);
+ if(!f) {
+ fprintf(stderr, "Please change tinc's Port manually.\n");
+ return 0;
+ }
+
+ fprintf(f, "Port = %d\n", port);
+ fclose(f);
+ fprintf(stderr, "Tinc will instead listen on port %d.\n", port);
+ return port;
+ }
+ }
+
+ fprintf(stderr, "Please change tinc's Port manually.\n");
+ return 0;
+}
+
static int cmd_init(int argc, char *argv[]) {
if(!access(tinc_conf, F_OK)) {
fprintf(stderr, "Configuration file %s already exists!\n", tinc_conf);
return 1;
}
- if(mkdir(confdir, 0755) && errno != EEXIST) {
- fprintf(stderr, "Could not create directory %s: %s\n", CONFDIR, strerror(errno));
+ if(!confbase_given && mkdir(confdir, 0755) && errno != EEXIST) {
+ fprintf(stderr, "Could not create directory %s: %s\n", confdir, strerror(errno));
return 1;
}
- if(mkdir(confbase, 0755) && errno != EEXIST) {
+ if(mkdir(confbase, 0777) && errno != EEXIST) {
fprintf(stderr, "Could not create directory %s: %s\n", confbase, strerror(errno));
return 1;
}
- if(mkdir(hosts_dir, 0755) && errno != EEXIST) {
+ if(mkdir(hosts_dir, 0777) && errno != EEXIST) {
fprintf(stderr, "Could not create directory %s: %s\n", hosts_dir, strerror(errno));
return 1;
}
if(!rsa_keygen(2048, false) || !ecdsa_keygen(false))
return 1;
+ check_port(name);
+
#ifndef HAVE_MINGW
char *filename;
xasprintf(&filename, "%s" SLASH "tinc-up", confbase);
if(access(filename, F_OK)) {
- FILE *f = fopen(filename, "w");
+ FILE *f = fopenmask(filename, "w", 0777);
if(!f) {
fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
return 1;
}
- fchmod(fileno(f), 0755);
- fprintf(f, "#!/bin/sh\n\necho 'Unconfigured tinc-up script, please edit!'\n\n#ifconfig $INTERFACE <your vpn IP address> netmask <netmask of whole VPN>\n");
+ fprintf(f, "#!/bin/sh\n\necho 'Unconfigured tinc-up script, please edit '$0'!'\n\n#ifconfig $INTERFACE <your vpn IP address> netmask <netmask of whole VPN>\n");
fclose(f);
}
#endif
return 0;
}
+#ifdef HAVE_MINGW
+ static struct WSAData wsa_state;
+
+ if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
+ fprintf(stderr, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
+ return false;
+ }
+#endif
+
+ srand(time(NULL));
crypto_init();
tty = isatty(0) && isatty(1);
projects / tinc / blobdiff