#include "top.h"
#ifdef HAVE_MINGW
-#define mkdir(a, b) mkdir(a)
#define SCRIPTEXTENSION ".bat"
#else
#define SCRIPTEXTENSION ""
" 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"
w = fopen(tmpfile, "w");
+#ifdef HAVE_FCHMOD
+ /* Let the temporary file have the same permissions as the original. */
+
+ if(w) {
+ struct stat st = {.st_mode = 0600};
+ fstat(fileno(r), &st);
+ fchmod(fileno(w), st.st_mode);
+ }
+#endif
+
while(fgets(buf, sizeof buf, r)) {
if(!block && !strncmp(buf, "-----BEGIN ", 11)) {
if((strstr(buf, " EC ") && strstr(what, "ECDSA")) || (strstr(buf, " RSA ") && strstr(what, "RSA"))) {
filename = buf2;
}
- umask(0077); /* Disallow everything for group and other */
-
disable_old_keys(filename, what);
/* Open it first to keep the inode busy */
char *newline = NULL;
if(!fd)
-abort();
+ abort();
+
while(!(newline = memchr(buffer, '\n', blen))) {
int result = recv(fd, buffer + blen, sizeof buffer - blen, 0);
if(result == -1 && errno == EINTR)
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);
}
return 0;
}
+#ifdef SIGINT
+static void sigint_handler(int sig) {
+ fprintf(stderr, "\n");
+ shutdown(fd, SHUT_RDWR);
+}
+#endif
+
static int cmd_log(int argc, char *argv[]) {
if(argc > 2) {
fprintf(stderr, "Too many arguments!\n");
if(!connect_tincd(true))
return 1;
+#ifdef SIGINT
+ signal(SIGINT, sigint_handler);
+#endif
+
logcontrol(fd, stdout, argc > 1 ? atoi(argv[1]) : -1);
+
+#ifdef SIGINT
+ signal(SIGINT, SIG_DFL);
+#endif
+
+ close(fd);
+ fd = -1;
return 0;
}
{"KeyExpire", VAR_SERVER},
{"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));
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;
+}
+
static int cmd_init(int argc, char *argv[]) {
if(!access(tinc_conf, F_OK)) {
fprintf(stderr, "Configuration file %s already exists!\n", tinc_conf);
if(!rsa_keygen(2048, false) || !ecdsa_keygen(false))
return 1;
+
+ if(!try_bind(655)) {
+ srand(time(NULL));
+ int port = 0;
+ for(int i = 0; i < 100; i++) {
+ port = 0x1000 + (rand() & 0x7fff);
+ if(try_bind(port))
+ break;
+ port = 0;
+ }
+ if(port) {
+ char *filename;
+ xasprintf(&filename, "%s" SLASH "hosts" SLASH "%s", confbase, name);
+ FILE *f = fopen(filename, "a");
+ free(filename);
+ if(!f) {
+ port = 0;
+ } else {
+ fprintf(f, "Port = %d\n", port);
+ fclose(f);
+ }
+ }
+
+ if(!port)
+ fprintf(stderr, "Warning: could not bind to port 655. Please change tinc's Port manually.\n");
+ else
+ fprintf(stderr, "Warning: could not bind to port 655. Tinc will instead listen on port %d.\n", port);
+ }
+
#ifndef HAVE_MINGW
char *filename;
xasprintf(&filename, "%s" SLASH "tinc-up", confbase);
fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
return 1;
}
- fchmod(fileno(f), 0755);
+ mode_t mask = umask(0);
+ umask(mask);
+ fchmod(fileno(f), 0755 & ~mask);
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");
fclose(f);
}
projects / tinc / blobdiff