X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Ftincctl.c;h=cf19d4818554d641191dba148b4d9c355d972d86;hp=a986af7633e69d9e7cf28b3d6956e9841e1335bd;hb=6c0584c55b99dd9814fed5c13536d831b3e5317e;hpb=e11daa264615f6eb5782f1f349b23f47518577dd

diff --git a/src/tincctl.c b/src/tincctl.c
index a986af76..cf19d481 100644
--- a/src/tincctl.c
+++ b/src/tincctl.c
@@ -1,6 +1,6 @@
 /*
     tincctl.c -- Controlling a running tincd
-    Copyright (C) 2007-2013 Guus Sliepen <guus@tinc-vpn.org>
+    Copyright (C) 2007-2018 Guus Sliepen <guus@tinc-vpn.org>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -31,6 +31,7 @@
 #include "control_common.h"
 #include "crypto.h"
 #include "ecdsagen.h"
+#include "fsck.h"
 #include "info.h"
 #include "invitation.h"
 #include "names.h"
@@ -38,6 +39,11 @@
 #include "utils.h"
 #include "tincctl.h"
 #include "top.h"
+#include "version.h"
+
+#ifndef MSG_NOSIGNAL
+#define MSG_NOSIGNAL 0
+#endif
 
 static char **orig_argv;
 static int orig_argc;
@@ -61,14 +67,19 @@ char line[4096];
 static int code;
 static int req;
 static int result;
-static bool force = false;
+bool force = false;
 bool tty = true;
 bool confbasegiven = false;
 bool netnamegiven = false;
 char *scriptinterpreter = NULL;
 char *scriptextension = "";
+static char *prompt;
+char *device = NULL;
+char *iface = NULL;
+int debug_level = -1;
 
 static struct option const long_options[] = {
+	{"batch", no_argument, NULL, 'b'},
 	{"config", required_argument, NULL, 'c'},
 	{"net", required_argument, NULL, 'n'},
 	{"help", no_argument, NULL, 1},
@@ -80,12 +91,12 @@ static struct option const long_options[] = {
 
 static void version(void) {
 	printf("%s version %s (built %s %s, protocol %d.%d)\n", PACKAGE,
-		   VERSION, __DATE__, __TIME__, PROT_MAJOR, PROT_MINOR);
-	printf("Copyright (C) 1998-2012 Ivo Timmermans, Guus Sliepen and others.\n"
-			"See the AUTHORS file for a complete list.\n\n"
-			"tinc comes with ABSOLUTELY NO WARRANTY.  This is free software,\n"
-			"and you are welcome to redistribute it under certain conditions;\n"
-			"see the file COPYING for details.\n");
+	       BUILD_VERSION, BUILD_DATE, BUILD_TIME, PROT_MAJOR, PROT_MINOR);
+	printf("Copyright (C) 1998-2018 Ivo Timmermans, Guus Sliepen and others.\n"
+	       "See the AUTHORS file for a complete list.\n\n"
+	       "tinc comes with ABSOLUTELY NO WARRANTY.  This is free software,\n"
+	       "and you are welcome to redistribute it under certain conditions;\n"
+	       "see the file COPYING for details.\n");
 }
 
 static void usage(bool status) {
@@ -94,50 +105,61 @@ static void usage(bool status) {
 	} else {
 		printf("Usage: %s [options] command\n\n", program_name);
 		printf("Valid options are:\n"
-				"  -c, --config=DIR        Read configuration options from DIR.\n"
-				"  -n, --net=NETNAME       Connect to net NETNAME.\n"
-				"      --pidfile=FILENAME  Read control cookie from FILENAME.\n"
-				"      --help              Display this help and exit.\n"
-				"      --version           Output version information and exit.\n"
-				"\n"
-				"Valid commands are:\n"
-				"  init [name]                Create initial configuration files.\n"
-				"  get VARIABLE               Print current value of VARIABLE\n"
-				"  set VARIABLE VALUE         Set VARIABLE to VALUE\n"
-				"  add VARIABLE VALUE         Add VARIABLE with the given VALUE\n"
-				"  del VARIABLE [VALUE]       Remove VARIABLE [only ones with watching VALUE]\n"
-				"  start [tincd options]      Start tincd.\n"
-				"  stop                       Stop 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"
-				"  generate-rsa-keys [bits]   Generate a new RSA public/private keypair.\n"
-				"  generate-ecdsa-keys        Generate a new ECDSA public/private keypair.\n"
-				"  dump                       Dump a list of one of the following things:\n"
-				"    [reachable] nodes        - all known nodes in the VPN\n"
-				"    edges                    - all known connections in the VPN\n"
-				"    subnets                  - all known subnets in the VPN\n"
-				"    connections              - all meta connections with ourself\n"
-				"    [di]graph                - graph of the VPN in dotty format\n"
-				"  info NODE|SUBNET|ADDRESS   Give information about a particular NODE, SUBNET or ADDRESS.\n"
-				"  purge                      Purge unreachable nodes\n"
-				"  debug N                    Set debug level\n"
-				"  retry                      Retry all outgoing connections\n"
-				"  disconnect NODE            Close meta connection with NODE\n"
+		       "  -b, --batch             Don't ask for anything (non-interactive mode).\n"
+		       "  -c, --config=DIR        Read configuration options from DIR.\n"
+		       "  -n, --net=NETNAME       Connect to net NETNAME.\n"
+		       "      --pidfile=FILENAME  Read control cookie from FILENAME.\n"
+		       "      --force             Force some commands to work despite warnings.\n"
+		       "      --help              Display this help and exit.\n"
+		       "      --version           Output version information and exit.\n"
+		       "\n"
+		       "Valid commands are:\n"
+		       "  init [name]                Create initial configuration files.\n"
+		       "  get VARIABLE               Print current value of VARIABLE\n"
+		       "  set VARIABLE VALUE         Set VARIABLE to VALUE\n"
+		       "  add VARIABLE VALUE         Add VARIABLE with the given VALUE\n"
+		       "  del VARIABLE [VALUE]       Remove VARIABLE [only ones with watching VALUE]\n"
+		       "  start [tincd options]      Start tincd.\n"
+		       "  stop                       Stop tincd.\n"
+		       "  restart [tincd options]    Restart tincd.\n"
+		       "  reload                     Partially reload configuration of running tincd.\n"
+		       "  pid                        Show PID of currently running tincd.\n"
+#ifdef DISABLE_LEGACY
+		       "  generate-keys              Generate a new Ed25519 public/private keypair.\n"
+#else
+		       "  generate-keys [bits]       Generate new RSA and Ed25519 public/private keypairs.\n"
+		       "  generate-rsa-keys [bits]   Generate a new RSA public/private keypair.\n"
+#endif
+		       "  generate-ed25519-keys      Generate a new Ed25519 public/private keypair.\n"
+		       "  dump                       Dump a list of one of the following things:\n"
+		       "    [reachable] nodes        - all known nodes in the VPN\n"
+		       "    edges                    - all known connections in the VPN\n"
+		       "    subnets                  - all known subnets in the VPN\n"
+		       "    connections              - all meta connections with ourself\n"
+		       "    [di]graph                - graph of the VPN in dotty format\n"
+		       "    invitations              - outstanding invitations\n"
+		       "  info NODE|SUBNET|ADDRESS   Give information about a particular NODE, SUBNET or ADDRESS.\n"
+		       "  purge                      Purge unreachable nodes\n"
+		       "  debug N                    Set debug level\n"
+		       "  retry                      Retry all outgoing connections\n"
+		       "  disconnect NODE            Close meta connection with NODE\n"
 #ifdef HAVE_CURSES
-				"  top                        Show real-time statistics\n"
+		       "  top                        Show real-time statistics\n"
 #endif
-				"  pcap [snaplen]             Dump traffic in pcap format [up to snaplen bytes per packet]\n"
-				"  log [level]                Dump log output [up to the specified level]\n"
-				"  export                     Export host configuration of local node to standard output\n"
-				"  export-all                 Export all host configuration files to standard output\n"
-				"  import [--force]           Import host configuration file(s) from standard input\n"
-				"  exchange [--force]         Same as export followed by import\n"
-				"  exchange-all [--force]     Same as export-all followed by import\n"
-				"  invite NODE [...]          Generate an invitation for NODE\n"
-				"  join INVITATION            Join a VPN using an INVITIATION\n"
-				"\n");
+		       "  pcap [snaplen]             Dump traffic in pcap format [up to snaplen bytes per packet]\n"
+		       "  log [level]                Dump log output [up to the specified level]\n"
+		       "  export                     Export host configuration of local node to standard output\n"
+		       "  export-all                 Export all host configuration files to standard output\n"
+		       "  import                     Import host configuration file(s) from standard input\n"
+		       "  exchange                   Same as export followed by import\n"
+		       "  exchange-all               Same as export-all followed by import\n"
+		       "  invite NODE [...]          Generate an invitation for NODE\n"
+		       "  join INVITATION            Join a VPN using an INVITATION\n"
+		       "  network [NETNAME]          List all known networks, or switch to the one named NETNAME.\n"
+		       "  fsck                       Check the configuration files for problems.\n"
+		       "  sign [FILE]                Generate a signed version of a file.\n"
+		       "  verify NODE [FILE]         Verify that a file was signed by the given NODE.\n"
+		       "\n");
 		printf("Report bugs to tinc@tinc-vpn.org.\n");
 	}
 }
@@ -146,47 +168,52 @@ static bool parse_options(int argc, char **argv) {
 	int r;
 	int option_index = 0;
 
-	while((r = getopt_long(argc, argv, "+c:n:", long_options, &option_index)) != EOF) {
-		switch (r) {
-			case 0:   /* long option */
-				break;
+	while((r = getopt_long(argc, argv, "+bc:n:", long_options, &option_index)) != EOF) {
+		switch(r) {
+		case 0:   /* long option */
+			break;
 
-			case 'c': /* config file */
-				confbase = xstrdup(optarg);
-				confbasegiven = true;
-				break;
+		case 'b':
+			tty = false;
+			break;
 
-			case 'n': /* net name given */
-				netname = xstrdup(optarg);
-				break;
+		case 'c': /* config file */
+			confbase = xstrdup(optarg);
+			confbasegiven = true;
+			break;
 
-			case 1:   /* show help */
-				show_help = true;
-				break;
+		case 'n': /* net name given */
+			netname = xstrdup(optarg);
+			break;
 
-			case 2:   /* show version */
-				show_version = true;
-				break;
+		case 1:   /* show help */
+			show_help = true;
+			break;
 
-			case 3:   /* open control socket here */
-				pidfilename = xstrdup(optarg);
-				break;
+		case 2:   /* show version */
+			show_version = true;
+			break;
 
-			case 4:   /* force */
-				force = true;
-				break;
+		case 3:   /* open control socket here */
+			pidfilename = xstrdup(optarg);
+			break;
 
-			case '?': /* wrong options */
-				usage(true);
-				return false;
+		case 4:   /* force */
+			force = true;
+			break;
 
-			default:
-				break;
+		case '?': /* wrong options */
+			usage(true);
+			return false;
+
+		default:
+			break;
 		}
 	}
 
-	if(!netname && (netname = getenv("NETNAME")))
+	if(!netname && (netname = getenv("NETNAME"))) {
 		netname = xstrdup(netname);
+	}
 
 	/* netname "." is special: a "top-level name" */
 
@@ -212,9 +239,18 @@ FILE *fopenmask(const char *filename, const char *mode, mode_t perms) {
 	perms &= ~mask;
 	umask(~perms);
 	FILE *f = fopen(filename, mode);
+
+	if(!f) {
+		fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno));
+		return NULL;
+	}
+
 #ifdef HAVE_FCHMOD
-	if((perms & 0444) && f)
+
+	if((perms & 0444) && f) {
 		fchmod(fileno(f), perms);
+	}
+
 #endif
 	umask(mask);
 	return f;
@@ -229,62 +265,76 @@ static void disable_old_keys(const char *filename, const char *what) {
 	FILE *r, *w;
 
 	r = fopen(filename, "r");
-	if(!r)
+
+	if(!r) {
 		return;
+	}
 
-	snprintf(tmpfile, sizeof tmpfile, "%s.tmp", filename);
+	snprintf(tmpfile, sizeof(tmpfile), "%s.tmp", filename);
 
 	struct stat st = {.st_mode = 0600};
 	fstat(fileno(r), &st);
 	w = fopenmask(tmpfile, "w", st.st_mode);
 
-	while(fgets(buf, sizeof buf, r)) {
+	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"))) {
+			if((strstr(buf, " ED25519 ") && strstr(what, "Ed25519")) || (strstr(buf, " RSA ") && strstr(what, "RSA"))) {
 				disabled = true;
 				block = true;
 			}
 		}
 
-		bool ecdsapubkey = !strncasecmp(buf, "ECDSAPublicKey", 14) && strchr(" \t=", buf[14]) && strstr(what, "ECDSA");
+		bool ed25519pubkey = !strncasecmp(buf, "Ed25519PublicKey", 16) && strchr(" \t=", buf[16]) && strstr(what, "Ed25519");
 
-		if(ecdsapubkey)
+		if(ed25519pubkey) {
 			disabled = true;
+		}
 
 		if(w) {
-			if(block || ecdsapubkey)
+			if(block || ed25519pubkey) {
 				fputc('#', w);
+			}
+
 			if(fputs(buf, w) < 0) {
 				error = true;
 				break;
 			}
 		}
 
-		if(block && !strncmp(buf, "-----END ", 9))
+		if(block && !strncmp(buf, "-----END ", 9)) {
 			block = false;
+		}
 	}
 
 	if(w)
-		if(fclose(w) < 0)
+		if(fclose(w) < 0) {
 			error = true;
-	if(ferror(r) || fclose(r) < 0)
+		}
+
+	if(ferror(r) || fclose(r) < 0) {
 		error = true;
+	}
 
 	if(disabled) {
 		if(!w || error) {
 			fprintf(stderr, "Warning: old key(s) found, remove them by hand!\n");
-			if(w)
+
+			if(w) {
 				unlink(tmpfile);
+			}
+
 			return;
 		}
 
 #ifdef HAVE_MINGW
 		// We cannot atomically replace files on Windows.
 		char bakfile[PATH_MAX] = "";
-		snprintf(bakfile, sizeof bakfile, "%s.bak", filename);
+		snprintf(bakfile, sizeof(bakfile), "%s.bak", filename);
+
 		if(rename(filename, bakfile) || rename(tmpfile, filename)) {
 			rename(bakfile, filename);
 #else
+
 		if(rename(tmpfile, filename)) {
 #endif
 			fprintf(stderr, "Warning: old key(s) found, remove them by hand!\n");
@@ -301,37 +351,41 @@ static void disable_old_keys(const char *filename, const char *what) {
 
 static FILE *ask_and_open(const char *filename, const char *what, const char *mode, bool ask, mode_t perms) {
 	FILE *r;
-	char *directory;
+	char directory[PATH_MAX] = ".";
 	char buf[PATH_MAX];
 	char buf2[PATH_MAX];
 
 	/* Check stdin and stdout */
 	if(ask && tty) {
 		/* Ask for a file and/or directory name. */
-		fprintf(stdout, "Please enter a file to save %s to [%s]: ", what, filename);
-		fflush(stdout);
+		fprintf(stderr, "Please enter a file to save %s to [%s]: ", what, filename);
 
-		if(fgets(buf, sizeof buf, stdin) == NULL) {
+		if(fgets(buf, sizeof(buf), stdin) == NULL) {
 			fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
 			return NULL;
 		}
 
 		size_t len = strlen(buf);
-		if(len)
+
+		if(len) {
 			buf[--len] = 0;
+		}
 
-		if(len)
+		if(len) {
 			filename = buf;
+		}
 	}
 
 #ifdef HAVE_MINGW
+
 	if(filename[0] != '\\' && filename[0] != '/' && !strchr(filename, ':')) {
 #else
+
 	if(filename[0] != '/') {
 #endif
 		/* The directory is a relative path or a filename. */
-		directory = get_current_dir_name();
-		snprintf(buf2, sizeof buf2, "%s" SLASH "%s", directory, filename);
+		getcwd(directory, sizeof(directory));
+		snprintf(buf2, sizeof(buf2), "%s" SLASH "%s", directory, filename);
 		filename = buf2;
 	}
 
@@ -350,59 +404,69 @@ static FILE *ask_and_open(const char *filename, const char *what, const char *mo
 }
 
 /*
-  Generate a public/private ECDSA keypair, and ask for a file to store
+  Generate a public/private Ed25519 keypair, and ask for a file to store
   them in.
 */
-static bool ecdsa_keygen(bool ask) {
+static bool ed25519_keygen(bool ask) {
 	ecdsa_t *key;
 	FILE *f;
-	char *pubname, *privname;
+	char fname[PATH_MAX];
 
-	fprintf(stderr, "Generating ECDSA keypair:\n");
+	fprintf(stderr, "Generating Ed25519 keypair:\n");
 
 	if(!(key = ecdsa_generate())) {
 		fprintf(stderr, "Error during key generation!\n");
 		return false;
-	} else
+	} else {
 		fprintf(stderr, "Done.\n");
+	}
 
-	xasprintf(&privname, "%s" SLASH "ecdsa_key.priv", confbase);
-	f = ask_and_open(privname, "private ECDSA key", "a", ask, 0600);
-	free(privname);
+	snprintf(fname, sizeof(fname), "%s" SLASH "ed25519_key.priv", confbase);
+	f = ask_and_open(fname, "private Ed25519 key", "a", ask, 0600);
 
-	if(!f)
-		return false;
+	if(!f) {
+		goto error;
+	}
 
 	if(!ecdsa_write_pem_private_key(key, f)) {
 		fprintf(stderr, "Error writing private key!\n");
-		ecdsa_free(key);
-		fclose(f);
-		return false;
+		goto error;
 	}
 
 	fclose(f);
 
-	if(name)
-		xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
-	else
-		xasprintf(&pubname, "%s" SLASH "ecdsa_key.pub", confbase);
+	if(name) {
+		snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, name);
+	} else {
+		snprintf(fname, sizeof(fname), "%s" SLASH "ed25519_key.pub", confbase);
+	}
 
-	f = ask_and_open(pubname, "public ECDSA key", "a", ask, 0666);
-	free(pubname);
+	f = ask_and_open(fname, "public Ed25519 key", "a", ask, 0666);
 
-	if(!f)
+	if(!f) {
 		return false;
+	}
 
 	char *pubkey = ecdsa_get_base64_public_key(key);
-	fprintf(f, "ECDSAPublicKey = %s\n", pubkey);
+	fprintf(f, "Ed25519PublicKey = %s\n", pubkey);
 	free(pubkey);
 
 	fclose(f);
 	ecdsa_free(key);
 
 	return true;
+
+error:
+
+	if(f) {
+		fclose(f);
+	}
+
+	ecdsa_free(key);
+	return false;
 }
 
+#ifndef DISABLE_LEGACY
 /*
   Generate a public/private RSA keypair, and ask for a file to store
   them in.
@@ -410,55 +474,74 @@ static bool ecdsa_keygen(bool ask) {
 static bool rsa_keygen(int bits, bool ask) {
 	rsa_t *key;
 	FILE *f;
-	char *pubname, *privname;
+	char fname[PATH_MAX];
+
+	// Make sure the key size is a multiple of 8 bits.
+	bits &= ~0x7;
+
+	// Make sure that a valid key size is used.
+	if(bits < 1024 || bits > 8192) {
+		fprintf(stderr, "Invalid key size %d specified! It should be between 1024 and 8192 bits.\n", bits);
+		return false;
+	} else if(bits < 2048) {
+		fprintf(stderr, "WARNING: generating a weak %d bits RSA key! 2048 or more bits are recommended.\n", bits);
+	}
 
 	fprintf(stderr, "Generating %d bits keys:\n", bits);
 
 	if(!(key = rsa_generate(bits, 0x10001))) {
 		fprintf(stderr, "Error during key generation!\n");
 		return false;
-	} else
+	} else {
 		fprintf(stderr, "Done.\n");
+	}
 
-	xasprintf(&privname, "%s" SLASH "rsa_key.priv", confbase);
-	f = ask_and_open(privname, "private RSA key", "a", ask, 0600);
-	free(privname);
+	snprintf(fname, sizeof(fname), "%s" SLASH "rsa_key.priv", confbase);
+	f = ask_and_open(fname, "private RSA key", "a", ask, 0600);
 
-	if(!f)
-		return false;
+	if(!f) {
+		goto error;
+	}
 
 	if(!rsa_write_pem_private_key(key, f)) {
 		fprintf(stderr, "Error writing private key!\n");
-		fclose(f);
-		rsa_free(key);
-		return false;
+		goto error;
 	}
 
 	fclose(f);
 
-	if(name)
-		xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
-	else
-		xasprintf(&pubname, "%s" SLASH "rsa_key.pub", confbase);
+	if(name) {
+		snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, name);
+	} else {
+		snprintf(fname, sizeof(fname), "%s" SLASH "rsa_key.pub", confbase);
+	}
 
-	f = ask_and_open(pubname, "public RSA key", "a", ask, 0666);
-	free(pubname);
+	f = ask_and_open(fname, "public RSA key", "a", ask, 0666);
 
-	if(!f)
-		return false;
+	if(!f) {
+		goto error;
+	}
 
 	if(!rsa_write_pem_public_key(key, f)) {
 		fprintf(stderr, "Error writing public key!\n");
-		fclose(f);
-		rsa_free(key);
-		return false;
+		goto error;
 	}
 
 	fclose(f);
 	rsa_free(key);
 
 	return true;
+
+error:
+
+	if(f) {
+		fclose(f);
+	}
+
+	rsa_free(key);
+	return false;
 }
+#endif
 
 char buffer[4096];
 size_t blen = 0;
@@ -466,20 +549,25 @@ size_t blen = 0;
 bool recvline(int fd, char *line, size_t len) {
 	char *newline = NULL;
 
-	if(!fd)
-		abort();
+	if(!fd) {
+		return false;
+	}
 
 	while(!(newline = memchr(buffer, '\n', blen))) {
-		int result = recv(fd, buffer + blen, sizeof buffer - blen, 0);
-		if(result == -1 && errno == EINTR)
+		int result = recv(fd, buffer + blen, sizeof(buffer) - blen, 0);
+
+		if(result == -1 && sockerrno == EINTR) {
 			continue;
-		else if(result <= 0)
+		} else if(result <= 0) {
 			return false;
+		}
+
 		blen += result;
 	}
 
-	if(newline - buffer >= len)
+	if(newline - buffer >= len) {
 		return false;
+	}
 
 	len = newline - buffer;
 
@@ -492,15 +580,19 @@ bool recvline(int fd, char *line, size_t len) {
 }
 
 bool recvdata(int fd, char *data, size_t len) {
-	if(len == -1)
+	if(len == -1) {
 		len = blen;
+	}
 
 	while(blen < len) {
-		int result = recv(fd, buffer + blen, sizeof buffer - blen, 0);
-		if(result == -1 && errno == EINTR)
+		int result = recv(fd, buffer + blen, sizeof(buffer) - blen, 0);
+
+		if(result == -1 && sockerrno == EINTR) {
 			continue;
-		else if(result <= 0)
+		} else if(result <= 0) {
 			return false;
+		}
+
 		blen += result;
 	}
 
@@ -518,21 +610,26 @@ bool sendline(int fd, char *format, ...) {
 	va_list ap;
 
 	va_start(ap, format);
-	blen = vsnprintf(buffer, sizeof buffer, format, ap);
+	blen = vsnprintf(buffer, sizeof(buffer), format, ap);
+	buffer[sizeof(buffer) - 1] = 0;
 	va_end(ap);
 
-	if(blen < 1 || blen >= sizeof buffer)
+	if(blen < 1 || blen >= sizeof(buffer)) {
 		return false;
+	}
 
 	buffer[blen] = '\n';
 	blen++;
 
 	while(blen) {
-		int result = send(fd, p, blen, 0);
-		if(result == -1 && errno == EINTR)
+		int result = send(fd, p, blen, MSG_NOSIGNAL);
+
+		if(result == -1 && sockerrno == EINTR) {
 			continue;
-		else if(result <= 0)
+		} else if(result <= 0) {
 			return false;
+		}
+
 		p += result;
 		blen -= result;
 	}
@@ -556,7 +653,7 @@ static void pcap(int fd, FILE *out, int snaplen) {
 		0xa1b2c3d4,
 		2, 4,
 		0, 0,
-		snaplen ?: sizeof data,
+		snaplen ? : sizeof(data),
 		1,
 	};
 
@@ -569,23 +666,29 @@ static void pcap(int fd, FILE *out, int snaplen) {
 
 	struct timeval tv;
 
-	fwrite(&header, sizeof header, 1, out);
+	fwrite(&header, sizeof(header), 1, out);
 	fflush(out);
 
 	char line[32];
-	while(recvline(fd, line, sizeof line)) {
+
+	while(recvline(fd, line, sizeof(line))) {
 		int code, req, len;
 		int n = sscanf(line, "%d %d %d", &code, &req, &len);
 		gettimeofday(&tv, NULL);
-		if(n != 3 || code != CONTROL || req != REQ_PCAP || len < 0 || len > sizeof data)
+
+		if(n != 3 || code != CONTROL || req != REQ_PCAP || len < 0 || len > sizeof(data)) {
 			break;
-		if(!recvdata(fd, data, len))
+		}
+
+		if(!recvdata(fd, data, len)) {
 			break;
+		}
+
 		packet.tv_sec = tv.tv_sec;
 		packet.tv_usec = tv.tv_usec;
 		packet.len = len;
 		packet.origlen = len;
-		fwrite(&packet, sizeof packet, 1, out);
+		fwrite(&packet, sizeof(packet), 1, out);
 		fwrite(data, len, 1, out);
 		fflush(out);
 	}
@@ -596,13 +699,18 @@ static void logcontrol(int fd, FILE *out, int level) {
 	char data[1024];
 	char line[32];
 
-	while(recvline(fd, line, sizeof line)) {
+	while(recvline(fd, line, sizeof(line))) {
 		int code, req, len;
 		int n = sscanf(line, "%d %d %d", &code, &req, &len);
-		if(n != 3 || code != CONTROL || req != REQ_LOG || len < 0 || len > sizeof data)
+
+		if(n != 3 || code != CONTROL || req != REQ_LOG || len < 0 || len > sizeof(data)) {
 			break;
-		if(!recvdata(fd, data, len))
+		}
+
+		if(!recvdata(fd, data, len)) {
 			break;
+		}
+
 		fwrite(data, len, 1, out);
 		fputc('\n', out);
 		fflush(out);
@@ -614,33 +722,50 @@ static bool remove_service(void) {
 	SC_HANDLE manager = NULL;
 	SC_HANDLE service = NULL;
 	SERVICE_STATUS status = {0};
+	bool success = false;
 
 	manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
+
 	if(!manager) {
 		fprintf(stderr, "Could not open service manager: %s\n", winerror(GetLastError()));
-		return false;
+		goto exit;
 	}
 
 	service = OpenService(manager, identname, SERVICE_ALL_ACCESS);
 
 	if(!service) {
 		fprintf(stderr, "Could not open %s service: %s\n", identname, winerror(GetLastError()));
-		return false;
+		goto exit;
 	}
 
-	if(!ControlService(service, SERVICE_CONTROL_STOP, &status))
+	if(!ControlService(service, SERVICE_CONTROL_STOP, &status)) {
 		fprintf(stderr, "Could not stop %s service: %s\n", identname, winerror(GetLastError()));
-	else
+	} else {
 		fprintf(stderr, "%s service stopped\n", identname);
+	}
 
 	if(!DeleteService(service)) {
 		fprintf(stderr, "Could not remove %s service: %s\n", identname, winerror(GetLastError()));
-		return false;
+		goto exit;
 	}
 
-	fprintf(stderr, "%s service removed\n", identname);
+	success = true;
 
-	return true;
+exit:
+
+	if(service) {
+		CloseServiceHandle(service);
+	}
+
+	if(manager) {
+		CloseServiceHandle(manager);
+	}
+
+	if(success) {
+		fprintf(stderr, "%s service removed\n", identname);
+	}
+
+	return success;
 }
 #endif
 
@@ -650,6 +775,7 @@ bool connect_tincd(bool verbose) {
 		FD_ZERO(&r);
 		FD_SET(fd, &r);
 		struct timeval tv = {0, 0};
+
 		if(select(fd + 1, &r, NULL, NULL, &tv)) {
 			fprintf(stderr, "Previous connection to tincd lost, reconnecting.\n");
 			close(fd);
@@ -660,9 +786,12 @@ bool connect_tincd(bool verbose) {
 	}
 
 	FILE *f = fopen(pidfilename, "r");
+
 	if(!f) {
-		if(verbose)
+		if(verbose) {
 			fprintf(stderr, "Could not open pid file %s: %s\n", pidfilename, strerror(errno));
+		}
+
 		return false;
 	}
 
@@ -670,8 +799,10 @@ bool connect_tincd(bool verbose) {
 	char port[129];
 
 	if(fscanf(f, "%20d %1024s %128s port %128s", &pid, controlcookie, host, port) != 4) {
-		if(verbose)
+		if(verbose) {
 			fprintf(stderr, "Could not parse pid file %s\n", pidfilename);
+		}
+
 		fclose(f);
 		return false;
 	}
@@ -679,24 +810,41 @@ bool connect_tincd(bool verbose) {
 	fclose(f);
 
 #ifndef HAVE_MINGW
+
+	if((pid == 0) || (kill(pid, 0) && (errno == ESRCH))) {
+		fprintf(stderr, "Could not find tincd running at pid %d\n", pid);
+		/* clean up the stale socket and pid file */
+		unlink(pidfilename);
+		unlink(unixsocketname);
+		return false;
+	}
+
 	struct sockaddr_un sa;
+
 	sa.sun_family = AF_UNIX;
-	strncpy(sa.sun_path, unixsocketname, sizeof sa.sun_path);
+
+	strncpy(sa.sun_path, unixsocketname, sizeof(sa.sun_path));
 
 	fd = socket(AF_UNIX, SOCK_STREAM, 0);
+
 	if(fd < 0) {
-		if(verbose)
+		if(verbose) {
 			fprintf(stderr, "Cannot create UNIX socket: %s\n", sockstrerror(sockerrno));
+		}
+
 		return false;
 	}
 
-	if(connect(fd, (struct sockaddr *)&sa, sizeof sa) < 0) {
-		if(verbose)
+	if(connect(fd, (struct sockaddr *)&sa, sizeof(sa)) < 0) {
+		if(verbose) {
 			fprintf(stderr, "Cannot connect to UNIX socket %s: %s\n", unixsocketname, sockstrerror(sockerrno));
+		}
+
 		close(fd);
 		fd = -1;
 		return false;
 	}
+
 #else
 	struct addrinfo hints = {
 		.ai_family = AF_UNSPEC,
@@ -708,15 +856,20 @@ bool connect_tincd(bool verbose) {
 	struct addrinfo *res = NULL;
 
 	if(getaddrinfo(host, port, &hints, &res) || !res) {
-		if(verbose)
-			fprintf(stderr, "Cannot resolve %s port %s: %s", host, port, strerror(errno));
+		if(verbose) {
+			fprintf(stderr, "Cannot resolve %s port %s: %s\n", host, port, sockstrerror(sockerrno));
+		}
+
 		return false;
 	}
 
 	fd = socket(res->ai_family, SOCK_STREAM, IPPROTO_TCP);
+
 	if(fd < 0) {
-		if(verbose)
+		if(verbose) {
 			fprintf(stderr, "Cannot create TCP socket: %s\n", sockstrerror(sockerrno));
+		}
+
 		return false;
 	}
 
@@ -724,14 +877,18 @@ bool connect_tincd(bool verbose) {
 	unsigned long arg = 0;
 
 	if(ioctlsocket(fd, FIONBIO, &arg) != 0) {
-		if(verbose)
-			fprintf(stderr, "ioctlsocket failed: %s", sockstrerror(sockerrno));
+		if(verbose) {
+			fprintf(stderr, "System call `%s' failed: %s\n", "ioctlsocket", sockstrerror(sockerrno));
+		}
 	}
+
 #endif
 
 	if(connect(fd, res->ai_addr, res->ai_addrlen) < 0) {
-		if(verbose)
+		if(verbose) {
 			fprintf(stderr, "Cannot connect to %s port %s: %s\n", host, port, sockstrerror(sockerrno));
+		}
+
 		close(fd);
 		fd = -1;
 		return false;
@@ -740,12 +897,19 @@ bool connect_tincd(bool verbose) {
 	freeaddrinfo(res);
 #endif
 
+#ifdef SO_NOSIGPIPE
+	static const int one = 1;
+	setsockopt(fd, SOL_SOCKET, SO_NOSIGPIPE, (void *)&one, sizeof(one));
+#endif
+
 	char data[4096];
 	int version;
 
-	if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %s %d", &code, data, &version) != 3 || code != 0) {
-		if(verbose)
+	if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %4095s %d", &code, data, &version) != 3 || code != 0) {
+		if(verbose) {
 			fprintf(stderr, "Cannot read greeting from control socket: %s\n", sockstrerror(sockerrno));
+		}
+
 		close(fd);
 		fd = -1;
 		return false;
@@ -753,9 +917,11 @@ bool connect_tincd(bool verbose) {
 
 	sendline(fd, "%d ^%s %d", ID, controlcookie, TINC_CTL_VERSION_CURRENT);
 
-	if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &version, &pid) != 3 || code != 4 || version != TINC_CTL_VERSION_CURRENT) {
-		if(verbose)
+	if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &version, &pid) != 3 || code != 4 || version != TINC_CTL_VERSION_CURRENT) {
+		if(verbose) {
 			fprintf(stderr, "Could not fully establish control socket connection\n");
+		}
+
 		close(fd);
 		fd = -1;
 		return false;
@@ -767,10 +933,12 @@ bool connect_tincd(bool verbose) {
 
 static int cmd_start(int argc, char *argv[]) {
 	if(connect_tincd(false)) {
-		if(netname)
+		if(netname) {
 			fprintf(stderr, "A tincd is already running for net `%s' with pid %d.\n", netname, pid);
-		else
+		} else {
 			fprintf(stderr, "A tincd is already running with pid %d.\n", pid);
+		}
+
 		return 0;
 	}
 
@@ -778,38 +946,79 @@ static int cmd_start(int argc, char *argv[]) {
 	char *slash = strrchr(program_name, '/');
 
 #ifdef HAVE_MINGW
-	if ((c = strrchr(program_name, '\\')) > slash)
+
+	if((c = strrchr(program_name, '\\')) > slash) {
 		slash = c;
+	}
+
 #endif
 
-	if (slash++)
+	if(slash++) {
 		xasprintf(&c, "%.*stincd", (int)(slash - program_name), program_name);
-	else
+	} else {
 		c = "tincd";
+	}
 
 	int nargc = 0;
-	char **nargv = xzalloc((optind + argc) * sizeof *nargv);
+	char **nargv = xzalloc((optind + argc) * sizeof(*nargv));
 
-	nargv[nargc++] = c;
-	for(int i = 1; i < optind; i++)
+	char *arg0 = c;
+#ifdef HAVE_MINGW
+	/*
+	   Windows has no real concept of an "argv array". A command line is just one string.
+	   The CRT of the new process will decode the command line string to generate argv before calling main(), and (by convention)
+	   it uses quotes to handle spaces in arguments.
+	   Therefore we need to quote all arguments that might contain spaces. No, execvp() won't do that for us (see MSDN).
+	   If we don't do that, then execvp() will run fine but any spaces in the filename contained in arg0 will bleed
+	   into the next arguments when the spawned process' CRT parses its command line, resulting in chaos.
+	*/
+	xasprintf(&arg0, "\"%s\"", arg0);
+#endif
+	nargv[nargc++] = arg0;
+
+	for(int i = 1; i < optind; i++) {
 		nargv[nargc++] = orig_argv[i];
-	for(int i = 1; i < argc; i++)
+	}
+
+	for(int i = 1; i < argc; i++) {
 		nargv[nargc++] = argv[i];
+	}
 
 #ifdef HAVE_MINGW
-	execvp(c, nargv);
-	fprintf(stderr, "Error starting %s: %s\n", c, strerror(errno));
-	return 1;
+	int status = spawnvp(_P_WAIT, c, nargv);
+
+	if(status == -1) {
+		fprintf(stderr, "Error starting %s: %s\n", c, strerror(errno));
+		return 1;
+	}
+
+	return status;
 #else
+	int pfd[2] = {-1, -1};
+
+	if(socketpair(AF_UNIX, SOCK_STREAM, 0, pfd)) {
+		fprintf(stderr, "Could not create umbilical socket: %s\n", strerror(errno));
+		free(nargv);
+		return 1;
+	}
+
 	pid_t pid = fork();
+
 	if(pid == -1) {
 		fprintf(stderr, "Could not fork: %s\n", strerror(errno));
 		free(nargv);
 		return 1;
 	}
 
-	if(!pid)
+	if(!pid) {
+		close(pfd[0]);
+		char buf[100];
+		snprintf(buf, sizeof(buf), "%d", pfd[1]);
+		setenv("TINC_UMBILICAL", buf, true);
 		exit(execvp(c, nargv));
+	} else {
+		close(pfd[1]);
+	}
 
 	free(nargv);
 
@@ -817,12 +1026,37 @@ static int cmd_start(int argc, char *argv[]) {
 #ifdef SIGINT
 	signal(SIGINT, SIG_IGN);
 #endif
+
+	// Pass all log messages from the umbilical to stderr.
+	// A nul-byte right before closure means tincd started successfully.
+	bool failure = true;
+	char buf[1024];
+	ssize_t len;
+
+	while((len = read(pfd[0], buf, sizeof(buf))) > 0) {
+		failure = buf[len - 1];
+
+		if(!failure) {
+			len--;
+		}
+
+		write(2, buf, len);
+	}
+
+	if(len) {
+		failure = true;
+	}
+
+	close(pfd[0]);
+
+	// Make sure the child process is really gone.
 	result = waitpid(pid, &status, 0);
+
 #ifdef SIGINT
 	signal(SIGINT, SIG_DFL);
 #endif
 
-	if(result != pid || !WIFEXITED(status) || WEXITSTATUS(status)) {
+	if(failure || result != pid || !WIFEXITED(status) || WEXITSTATUS(status)) {
 		fprintf(stderr, "Error starting %s\n", c);
 		return 1;
 	}
@@ -838,14 +1072,15 @@ static int cmd_stop(int argc, char *argv[]) {
 	}
 
 #ifndef HAVE_MINGW
+
 	if(!connect_tincd(true)) {
 		if(pid) {
 			if(kill(pid, SIGTERM)) {
-				fprintf(stderr, "Could not send TERM signal to process with PID %u: %s\n", pid, strerror(errno));
+				fprintf(stderr, "Could not send TERM signal to process with PID %d: %s\n", pid, strerror(errno));
 				return 1;
 			}
 
-			fprintf(stderr, "Sent TERM signal to process with PID %u.\n", pid);
+			fprintf(stderr, "Sent TERM signal to process with PID %d.\n", pid);
 			waitpid(pid, NULL, 0);
 			return 0;
 		}
@@ -855,12 +1090,16 @@ static int cmd_stop(int argc, char *argv[]) {
 
 	sendline(fd, "%d %d", CONTROL, REQ_STOP);
 
-	while(recvline(fd, line, sizeof line)) {
+	while(recvline(fd, line, sizeof(line))) {
 		// Wait for tincd to close the connection...
 	}
+
 #else
-	if(!remove_service())
+
+	if(!remove_service()) {
 		return 1;
+	}
+
 #endif
 	close(fd);
 	pid = 0;
@@ -880,11 +1119,13 @@ static int cmd_reload(int argc, char *argv[]) {
 		return 1;
 	}
 
-	if(!connect_tincd(true))
+	if(!connect_tincd(true)) {
 		return 1;
+	}
 
 	sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
-	if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RELOAD || result) {
+
+	if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RELOAD || result) {
 		fprintf(stderr, "Could not reload configuration.\n");
 		return 1;
 	}
@@ -893,79 +1134,163 @@ static int cmd_reload(int argc, char *argv[]) {
 
 }
 
-static int cmd_dump(int argc, char *argv[]) {
-	bool only_reachable = false;
+static int dump_invitations(void) {
+	char dname[PATH_MAX];
+	snprintf(dname, sizeof(dname), "%s" SLASH "invitations", confbase);
+	DIR *dir = opendir(dname);
 
-	if(argc > 2 && !strcasecmp(argv[1], "reachable")) {
-		if(strcasecmp(argv[2], "nodes")) {
-			fprintf(stderr, "`reachable' only supported for nodes.\n");
-			usage(true);
-			return 1;
+	if(!dir) {
+		if(errno == ENOENT) {
+			fprintf(stderr, "No outstanding invitations.\n");
+			return 0;
 		}
-		only_reachable = true;
-		argv++;
-		argc--;
-	}
 
-	if(argc != 2) {
-		fprintf(stderr, "Invalid number of arguments.\n");
-		usage(true);
+		fprintf(stderr, "Cannot not read directory %s: %s\n", dname, strerror(errno));
 		return 1;
 	}
 
-	if(!connect_tincd(true))
-		return 1;
+	struct dirent *ent;
 
-	int do_graph = 0;
+	bool found = false;
 
-	if(!strcasecmp(argv[1], "nodes"))
-		sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
-	else if(!strcasecmp(argv[1], "edges"))
-		sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
-	else if(!strcasecmp(argv[1], "subnets"))
-		sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
-	else if(!strcasecmp(argv[1], "connections"))
-		sendline(fd, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
-	else if(!strcasecmp(argv[1], "graph")) {
-		sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
-		sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
-		do_graph = 1;
-	} else if(!strcasecmp(argv[1], "digraph")) {
-		sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
-		sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
-		do_graph = 2;
-	} else {
-		fprintf(stderr, "Unknown dump type '%s'.\n", argv[1]);
-		usage(true);
-		return 1;
-	}
+	while((ent = readdir(dir))) {
+		char buf[MAX_STRING_SIZE];
 
-	if(do_graph == 1)
-		printf("graph {\n");
-	else if(do_graph == 2)
-		printf("digraph {\n");
+		if(b64decode(ent->d_name, buf, 24) != 18) {
+			continue;
+		}
 
-	while(recvline(fd, line, sizeof line)) {
+		char fname[PATH_MAX];
+		snprintf(fname, sizeof(fname), "%s" SLASH "%s", dname, ent->d_name);
+		FILE *f = fopen(fname, "r");
+
+		if(!f) {
+			fprintf(stderr, "Cannot open %s: %s\n", fname, strerror(errno));
+			continue;
+		}
+
+		buf[0] = 0;
+
+		if(!fgets(buf, sizeof(buf), f)) {
+			fprintf(stderr, "Invalid invitation file %s\n", fname);
+			fclose(f);
+			continue;
+		}
+
+		fclose(f);
+
+		char *eol = buf + strlen(buf);
+
+		while(strchr("\t \r\n", *--eol)) {
+			*eol = 0;
+		}
+
+		if(strncmp(buf, "Name = ", 7) || !check_id(buf + 7)) {
+			fprintf(stderr, "Invalid invitation file %s\n", fname);
+			continue;
+		}
+
+		found = true;
+		printf("%s %s\n", ent->d_name, buf + 7);
+	}
+
+	closedir(dir);
+
+	if(!found) {
+		fprintf(stderr, "No outstanding invitations.\n");
+	}
+
+	return 0;
+}
+
+static int cmd_dump(int argc, char *argv[]) {
+	bool only_reachable = false;
+
+	if(argc > 2 && !strcasecmp(argv[1], "reachable")) {
+		if(strcasecmp(argv[2], "nodes")) {
+			fprintf(stderr, "`reachable' only supported for nodes.\n");
+			usage(true);
+			return 1;
+		}
+
+		only_reachable = true;
+		argv++;
+		argc--;
+	}
+
+	if(argc != 2) {
+		fprintf(stderr, "Invalid number of arguments.\n");
+		usage(true);
+		return 1;
+	}
+
+	if(!strcasecmp(argv[1], "invitations")) {
+		return dump_invitations();
+	}
+
+	if(!connect_tincd(true)) {
+		return 1;
+	}
+
+	int do_graph = 0;
+
+	if(!strcasecmp(argv[1], "nodes")) {
+		sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
+	} else if(!strcasecmp(argv[1], "edges")) {
+		sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
+	} else if(!strcasecmp(argv[1], "subnets")) {
+		sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
+	} else if(!strcasecmp(argv[1], "connections")) {
+		sendline(fd, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
+	} else if(!strcasecmp(argv[1], "graph")) {
+		sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
+		sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
+		do_graph = 1;
+	} else if(!strcasecmp(argv[1], "digraph")) {
+		sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
+		sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
+		do_graph = 2;
+	} else {
+		fprintf(stderr, "Unknown dump type '%s'.\n", argv[1]);
+		usage(true);
+		return 1;
+	}
+
+	if(do_graph == 1) {
+		printf("graph {\n");
+	} else if(do_graph == 2) {
+		printf("digraph {\n");
+	}
+
+	while(recvline(fd, line, sizeof(line))) {
 		char node1[4096], node2[4096];
-		int n = sscanf(line, "%d %d %s %s", &code, &req, node1, node2);
+		int n = sscanf(line, "%d %d %4095s %4095s", &code, &req, node1, node2);
+
 		if(n == 2) {
-			if(do_graph && req == REQ_DUMP_NODES)
+			if(do_graph && req == REQ_DUMP_NODES) {
 				continue;
-			else {
-				if(do_graph)
+			} else {
+				if(do_graph) {
 					printf("}\n");
+				}
+
 				return 0;
 			}
 		}
-		if(n < 2)
+
+		if(n < 2) {
 			break;
+		}
 
 		char node[4096];
+		char id[4096];
 		char from[4096];
 		char to[4096];
 		char subnet[4096];
 		char host[4096];
 		char port[4096];
+		char local_host[4096];
+		char local_port[4096];
 		char via[4096];
 		char nexthop[4096];
 		int cipher, digest, maclength, compression, distance, socket, weight;
@@ -975,75 +1300,92 @@ static int cmd_dump(int argc, char *argv[]) {
 		long int last_state_change;
 
 		switch(req) {
-			case REQ_DUMP_NODES: {
-				int n = sscanf(line, "%*d %*d %s %s port %s %d %d %d %d %x %x %s %s %d %hd %hd %hd %ld", node, host, port, &cipher, &digest, &maclength, &compression, &options, &status_int, nexthop, via, &distance, &pmtu, &minmtu, &maxmtu, &last_state_change);
-				if(n != 16) {
-					fprintf(stderr, "Unable to parse node dump from tincd: %s\n", line);
-					return 1;
-				}
+		case REQ_DUMP_NODES: {
+			int n = sscanf(line, "%*d %*d %4095s %4095s %4095s port %4095s %d %d %d %d %x %x %4095s %4095s %d %hd %hd %hd %ld", node, id, host, port, &cipher, &digest, &maclength, &compression, &options, &status_int, nexthop, via, &distance, &pmtu, &minmtu, &maxmtu, &last_state_change);
 
-				memcpy(&status, &status_int, sizeof status);
+			if(n != 17) {
+				fprintf(stderr, "Unable to parse node dump from tincd: %s\n", line);
+				return 1;
+			}
 
-				if(do_graph) {
-					const char *color = "black";
-					if(!strcmp(host, "MYSELF"))
-						color = "green";
-					else if(!status.reachable)
-						color = "red";
-					else if(strcmp(via, node))
-						color = "orange";
-					else if(!status.validkey)
-						color = "black";
-					else if(minmtu > 0)
-						color = "green";
-					printf(" %s [label = \"%s\", color = \"%s\"%s];\n", node, node, color, strcmp(host, "MYSELF") ? "" : ", style = \"filled\"");
-				} else {
-					if(only_reachable && !status.reachable)
-						continue;
-					printf("%s at %s port %s cipher %d digest %d maclength %d compression %d options %x status %04x nexthop %s via %s distance %d pmtu %hd (min %hd max %hd)\n",
-							node, host, port, cipher, digest, maclength, compression, options, status_int, nexthop, via, distance, pmtu, minmtu, maxmtu);
+			memcpy(&status, &status_int, sizeof(status));
+
+			if(do_graph) {
+				const char *color = "black";
+
+				if(!strcmp(host, "MYSELF")) {
+					color = "green";
+				} else if(!status.reachable) {
+					color = "red";
+				} else if(strcmp(via, node)) {
+					color = "orange";
+				} else if(!status.validkey) {
+					color = "black";
+				} else if(minmtu > 0) {
+					color = "green";
 				}
-			} break;
 
-			case REQ_DUMP_EDGES: {
-				int n = sscanf(line, "%*d %*d %s %s %s port %s %x %d", from, to, host, port, &options, &weight);
-				if(n != 6) {
-					fprintf(stderr, "Unable to parse edge dump from tincd.\n");
-					return 1;
+				printf(" %s [label = \"%s\", color = \"%s\"%s];\n", node, node, color, strcmp(host, "MYSELF") ? "" : ", style = \"filled\"");
+			} else {
+				if(only_reachable && !status.reachable) {
+					continue;
 				}
 
-				if(do_graph) {
-					float w = 1 + 65536.0 / weight;
-					if(do_graph == 1 && strcmp(node1, node2) > 0)
-						printf(" %s -- %s [w = %f, weight = %f];\n", node1, node2, w, w);
-					else if(do_graph == 2)
-						printf(" %s -> %s [w = %f, weight = %f];\n", node1, node2, w, w);
-				} else {
-					printf("%s to %s at %s port %s options %x weight %d\n", from, to, host, port, options, weight);
-				}
-			} break;
+				printf("%s id %s at %s port %s cipher %d digest %d maclength %d compression %d options %x status %04x nexthop %s via %s distance %d pmtu %d (min %d max %d)\n",
+				       node, id, host, port, cipher, digest, maclength, compression, options, status_int, nexthop, via, distance, pmtu, minmtu, maxmtu);
+			}
+		}
+		break;
 
-			case REQ_DUMP_SUBNETS: {
-				int n = sscanf(line, "%*d %*d %s %s", subnet, node);
-				if(n != 2) {
-					fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
-					return 1;
-				}
-				printf("%s owner %s\n", strip_weight(subnet), node);
-			} break;
+		case REQ_DUMP_EDGES: {
+			int n = sscanf(line, "%*d %*d %4095s %4095s %4095s port %4095s %4095s port %4095s %x %d", from, to, host, port, local_host, local_port, &options, &weight);
 
-			case REQ_DUMP_CONNECTIONS: {
-				int n = sscanf(line, "%*d %*d %s %s port %s %x %d %x", node, host, port, &options, &socket, &status_int);
-				if(n != 6) {
-					fprintf(stderr, "Unable to parse connection dump from tincd.\n");
-					return 1;
+			if(n != 8) {
+				fprintf(stderr, "Unable to parse edge dump from tincd.\n");
+				return 1;
+			}
+
+			if(do_graph) {
+				float w = 1 + 65536.0 / weight;
+
+				if(do_graph == 1 && strcmp(node1, node2) > 0) {
+					printf(" %s -- %s [w = %f, weight = %f];\n", node1, node2, w, w);
+				} else if(do_graph == 2) {
+					printf(" %s -> %s [w = %f, weight = %f];\n", node1, node2, w, w);
 				}
-				printf("%s at %s port %s options %x socket %d status %x\n", node, host, port, options, socket, status_int);
-			} break;
+			} else {
+				printf("%s to %s at %s port %s local %s port %s options %x weight %d\n", from, to, host, port, local_host, local_port, options, weight);
+			}
+		}
+		break;
+
+		case REQ_DUMP_SUBNETS: {
+			int n = sscanf(line, "%*d %*d %4095s %4095s", subnet, node);
+
+			if(n != 2) {
+				fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
+				return 1;
+			}
+
+			printf("%s owner %s\n", strip_weight(subnet), node);
+		}
+		break;
+
+		case REQ_DUMP_CONNECTIONS: {
+			int n = sscanf(line, "%*d %*d %4095s %4095s port %4095s %x %d %x", node, host, port, &options, &socket, &status_int);
 
-			default:
-				fprintf(stderr, "Unable to parse dump from tincd.\n");
+			if(n != 6) {
+				fprintf(stderr, "Unable to parse connection dump from tincd.\n");
 				return 1;
+			}
+
+			printf("%s at %s port %s options %x socket %d status %x\n", node, host, port, options, socket, status_int);
+		}
+		break;
+
+		default:
+			fprintf(stderr, "Unable to parse dump from tincd.\n");
+			return 1;
 		}
 	}
 
@@ -1057,11 +1399,13 @@ static int cmd_purge(int argc, char *argv[]) {
 		return 1;
 	}
 
-	if(!connect_tincd(true))
+	if(!connect_tincd(true)) {
 		return 1;
+	}
 
 	sendline(fd, "%d %d", CONTROL, REQ_PURGE);
-	if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_PURGE || result) {
+
+	if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_PURGE || result) {
 		fprintf(stderr, "Could not purge old information.\n");
 		return 1;
 	}
@@ -1075,14 +1419,16 @@ static int cmd_debug(int argc, char *argv[]) {
 		return 1;
 	}
 
-	if(!connect_tincd(true))
+	if(!connect_tincd(true)) {
 		return 1;
+	}
 
 	int debuglevel = atoi(argv[1]);
 	int origlevel;
 
 	sendline(fd, "%d %d %d", CONTROL, REQ_SET_DEBUG, debuglevel);
-	if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &origlevel) != 3 || code != CONTROL || req != REQ_SET_DEBUG) {
+
+	if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &origlevel) != 3 || code != CONTROL || req != REQ_SET_DEBUG) {
 		fprintf(stderr, "Could not set debug level.\n");
 		return 1;
 	}
@@ -1097,11 +1443,13 @@ static int cmd_retry(int argc, char *argv[]) {
 		return 1;
 	}
 
-	if(!connect_tincd(true))
+	if(!connect_tincd(true)) {
 		return 1;
+	}
 
 	sendline(fd, "%d %d", CONTROL, REQ_RETRY);
-	if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RETRY || result) {
+
+	if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RETRY || result) {
 		fprintf(stderr, "Could not retry outgoing connections.\n");
 		return 1;
 	}
@@ -1120,11 +1468,13 @@ static int cmd_connect(int argc, char *argv[]) {
 		return 1;
 	}
 
-	if(!connect_tincd(true))
+	if(!connect_tincd(true)) {
 		return 1;
+	}
 
 	sendline(fd, "%d %d %s", CONTROL, REQ_CONNECT, argv[1]);
-	if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_CONNECT || result) {
+
+	if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_CONNECT || result) {
 		fprintf(stderr, "Could not connect to %s.\n", argv[1]);
 		return 1;
 	}
@@ -1143,11 +1493,13 @@ static int cmd_disconnect(int argc, char *argv[]) {
 		return 1;
 	}
 
-	if(!connect_tincd(true))
+	if(!connect_tincd(true)) {
 		return 1;
+	}
 
 	sendline(fd, "%d %d %s", CONTROL, REQ_DISCONNECT, argv[1]);
-	if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_DISCONNECT || result) {
+
+	if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_DISCONNECT || result) {
 		fprintf(stderr, "Could not disconnect %s.\n", argv[1]);
 		return 1;
 	}
@@ -1162,8 +1514,10 @@ static int cmd_top(int argc, char *argv[]) {
 	}
 
 #ifdef HAVE_CURSES
-	if(!connect_tincd(true))
+
+	if(!connect_tincd(true)) {
 		return 1;
+	}
 
 	top(fd);
 	return 0;
@@ -1179,8 +1533,9 @@ static int cmd_pcap(int argc, char *argv[]) {
 		return 1;
 	}
 
-	if(!connect_tincd(true))
+	if(!connect_tincd(true)) {
 		return 1;
+	}
 
 	pcap(fd, stdout, argc > 1 ? atoi(argv[1]) : 0);
 	return 0;
@@ -1199,8 +1554,9 @@ static int cmd_log(int argc, char *argv[]) {
 		return 1;
 	}
 
-	if(!connect_tincd(true))
+	if(!connect_tincd(true)) {
 		return 1;
+	}
 
 #ifdef SIGINT
 	signal(SIGINT, sigint_handler);
@@ -1223,8 +1579,9 @@ static int cmd_pid(int argc, char *argv[]) {
 		return 1;
 	}
 
-	if(!connect_tincd(true) && !pid)
+	if(!connect_tincd(true) || !pid) {
 		return 1;
+	}
 
 	printf("%d\n", pid);
 	return 0;
@@ -1232,43 +1589,92 @@ static int cmd_pid(int argc, char *argv[]) {
 
 int rstrip(char *value) {
 	int len = strlen(value);
-	while(len && strchr("\t\r\n ", value[len - 1]))
+
+	while(len && strchr("\t\r\n ", value[len - 1])) {
 		value[--len] = 0;
+	}
+
 	return len;
 }
 
 char *get_my_name(bool verbose) {
 	FILE *f = fopen(tinc_conf, "r");
+
 	if(!f) {
-		if(verbose)
+		if(verbose) {
 			fprintf(stderr, "Could not open %s: %s\n", tinc_conf, strerror(errno));
+		}
+
 		return NULL;
 	}
 
 	char buf[4096];
 	char *value;
-	while(fgets(buf, sizeof buf, f)) {
+
+	while(fgets(buf, sizeof(buf), f)) {
 		int len = strcspn(buf, "\t =");
 		value = buf + len;
 		value += strspn(value, "\t ");
+
 		if(*value == '=') {
 			value++;
 			value += strspn(value, "\t ");
 		}
-		if(!rstrip(value))
+
+		if(!rstrip(value)) {
 			continue;
+		}
+
 		buf[len] = 0;
-		if(strcasecmp(buf, "Name"))
+
+		if(strcasecmp(buf, "Name")) {
 			continue;
+		}
+
 		if(*value) {
 			fclose(f);
-			return strdup(value);
+			return replace_name(value);
 		}
 	}
 
 	fclose(f);
-	if(verbose)
+
+	if(verbose) {
 		fprintf(stderr, "Could not find Name in %s.\n", tinc_conf);
+	}
+
+	return NULL;
+}
+
+ecdsa_t *get_pubkey(FILE *f) {
+	char buf[4096];
+	char *value;
+
+	while(fgets(buf, sizeof(buf), f)) {
+		int len = strcspn(buf, "\t =");
+		value = buf + len;
+		value += strspn(value, "\t ");
+
+		if(*value == '=') {
+			value++;
+			value += strspn(value, "\t ");
+		}
+
+		if(!rstrip(value)) {
+			continue;
+		}
+
+		buf[len] = 0;
+
+		if(strcasecmp(buf, "Ed25519PublicKey")) {
+			continue;
+		}
+
+		if(*value) {
+			return ecdsa_set_base64_public_key(value);
+		}
+	}
+
 	return NULL;
 }
 
@@ -1279,20 +1685,26 @@ const var_t variables[] = {
 	{"BindToAddress", VAR_SERVER | VAR_MULTIPLE},
 	{"BindToInterface", VAR_SERVER},
 	{"Broadcast", VAR_SERVER | VAR_SAFE},
+	{"BroadcastSubnet", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
 	{"ConnectTo", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
 	{"DecrementTTL", VAR_SERVER},
 	{"Device", VAR_SERVER},
+	{"DeviceStandby", VAR_SERVER},
 	{"DeviceType", VAR_SERVER},
 	{"DirectOnly", VAR_SERVER},
-	{"ECDSAPrivateKeyFile", VAR_SERVER},
+	{"Ed25519PrivateKeyFile", VAR_SERVER},
 	{"ExperimentalProtocol", VAR_SERVER},
 	{"Forwarding", VAR_SERVER},
+	{"FWMark", VAR_SERVER},
 	{"GraphDumpFile", VAR_SERVER | VAR_OBSOLETE},
 	{"Hostnames", VAR_SERVER},
 	{"IffOneQueue", VAR_SERVER},
 	{"Interface", VAR_SERVER},
+	{"InvitationExpire", VAR_SERVER},
 	{"KeyExpire", VAR_SERVER},
+	{"ListenAddress", VAR_SERVER | VAR_MULTIPLE},
 	{"LocalDiscovery", VAR_SERVER},
+	{"LogLevel", VAR_SERVER},
 	{"MACExpire", VAR_SERVER},
 	{"MaxConnectionBurst", VAR_SERVER},
 	{"MaxOutputBufferSize", VAR_SERVER},
@@ -1311,8 +1723,17 @@ const var_t variables[] = {
 	{"ScriptsInterpreter", VAR_SERVER},
 	{"StrictSubnets", VAR_SERVER},
 	{"TunnelServer", VAR_SERVER},
+	{"UDPDiscovery", VAR_SERVER},
+	{"UDPDiscoveryKeepaliveInterval", VAR_SERVER},
+	{"UDPDiscoveryInterval", VAR_SERVER},
+	{"UDPDiscoveryTimeout", VAR_SERVER},
+	{"MTUInfoInterval", VAR_SERVER},
+	{"UDPInfoInterval", VAR_SERVER},
 	{"UDPRcvBuf", VAR_SERVER},
 	{"UDPSndBuf", VAR_SERVER},
+	{"UPnP", VAR_SERVER},
+	{"UPnPDiscoverWait", VAR_SERVER},
+	{"UPnPRefreshPeriod", VAR_SERVER},
 	{"VDEGroup", VAR_SERVER},
 	{"VDEPort", VAR_SERVER},
 	/* Host configuration */
@@ -1321,8 +1742,8 @@ const var_t variables[] = {
 	{"ClampMSS", VAR_SERVER | VAR_HOST},
 	{"Compression", VAR_SERVER | VAR_HOST},
 	{"Digest", VAR_SERVER | VAR_HOST},
-	{"ECDSAPublicKey", VAR_HOST},
-	{"ECDSAPublicKeyFile", VAR_SERVER | VAR_HOST},
+	{"Ed25519PublicKey", VAR_HOST},
+	{"Ed25519PublicKeyFile", VAR_SERVER | VAR_HOST},
 	{"IndirectData", VAR_SERVER | VAR_HOST},
 	{"MACLength", VAR_SERVER | VAR_HOST},
 	{"PMTU", VAR_SERVER | VAR_HOST},
@@ -1342,10 +1763,12 @@ static int cmd_config(int argc, char *argv[]) {
 		return 1;
 	}
 
-	if(strcasecmp(argv[0], "config"))
+	if(strcasecmp(argv[0], "config")) {
 		argv--, argc++;
+	}
 
 	int action = -2;
+
 	if(!strcasecmp(argv[1], "get")) {
 		argv++, argc--;
 	} else if(!strcasecmp(argv[1], "add")) {
@@ -1362,10 +1785,11 @@ static int cmd_config(int argc, char *argv[]) {
 	}
 
 	// Concatenate the rest of the command line
-	strncpy(line, argv[1], sizeof line - 1);
+	strncpy(line, argv[1], sizeof(line) - 1);
+
 	for(int i = 2; i < argc; i++) {
-		strncat(line, " ", sizeof line - 1 - strlen(line));
-		strncat(line, argv[i], sizeof line - 1 - strlen(line));
+		strncat(line, " ", sizeof(line) - 1 - strlen(line));
+		strncat(line, argv[i], sizeof(line) - 1 - strlen(line));
 	}
 
 	// Liberal parsing into node name, variable name and value.
@@ -1377,12 +1801,15 @@ static int cmd_config(int argc, char *argv[]) {
 	len = strcspn(line, "\t =");
 	value = line + len;
 	value += strspn(value, "\t ");
+
 	if(*value == '=') {
 		value++;
 		value += strspn(value, "\t ");
 	}
+
 	line[len] = '\0';
 	variable = strchr(line, '.');
+
 	if(variable) {
 		node = line;
 		*variable++ = 0;
@@ -1400,16 +1827,18 @@ static int cmd_config(int argc, char *argv[]) {
 		return 1;
 	}
 
-	if(action < -1 && *value)
+	if(action < -1 && *value) {
 		action = 0;
+	}
 
 	/* Some simple checks. */
 	bool found = false;
 	bool warnonremove = false;
 
 	for(int i = 0; variables[i].name; i++) {
-		if(strcasecmp(variables[i].name, variable))
+		if(strcasecmp(variables[i].name, variable)) {
 			continue;
+		}
 
 		found = true;
 		variable = (char *)variables[i].name;
@@ -1440,11 +1869,13 @@ static int cmd_config(int argc, char *argv[]) {
 
 		if(!node && !(variables[i].type & VAR_SERVER)) {
 			node = get_my_name(true);
-			if(!node)
+
+			if(!node) {
 				return 1;
+			}
 		}
 
-		/* Change "add" into "set" for variables that do not allow multiple occurences.
+		/* Change "add" into "set" for variables that do not allow multiple occurrences.
 		   Turn on warnings when it seems variables might be removed unintentionally. */
 
 		if(action == 1 && !(variables[i].type & VAR_MULTIPLE)) {
@@ -1472,24 +1903,28 @@ static int cmd_config(int argc, char *argv[]) {
 	}
 
 	// Open the right configuration file.
-	char *filename;
-	if(node)
-		xasprintf(&filename, "%s" SLASH "%s", hosts_dir, node);
-	else
-		filename = tinc_conf;
+	char filename[PATH_MAX];
+
+	if(node) {
+		snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, node);
+	} else {
+		snprintf(filename, sizeof(filename), "%s", tinc_conf);
+	}
 
 	FILE *f = fopen(filename, "r");
+
 	if(!f) {
 		fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
 		return 1;
 	}
 
-	char *tmpfile = NULL;
+	char tmpfile[PATH_MAX];
 	FILE *tf = NULL;
 
 	if(action >= -1) {
-		xasprintf(&tmpfile, "%s.config.tmp", filename);
+		snprintf(tmpfile, sizeof(tmpfile), "%s.config.tmp", filename);
 		tf = fopen(tmpfile, "w");
+
 		if(!tf) {
 			fprintf(stderr, "Could not open temporary file %s: %s\n", tmpfile, strerror(errno));
 			fclose(f);
@@ -1504,9 +1939,9 @@ static int cmd_config(int argc, char *argv[]) {
 	bool removed = false;
 	found = false;
 
-	while(fgets(buf1, sizeof buf1, f)) {
-		buf1[sizeof buf1 - 1] = 0;
-		strncpy(buf2, buf1, sizeof buf2);
+	while(fgets(buf1, sizeof(buf1), f)) {
+		buf1[sizeof(buf1) - 1] = 0;
+		strncpy(buf2, buf1, sizeof(buf2));
 
 		// Parse line in a simple way
 		char *bvalue;
@@ -1515,10 +1950,12 @@ static int cmd_config(int argc, char *argv[]) {
 		len = strcspn(buf2, "\t =");
 		bvalue = buf2 + len;
 		bvalue += strspn(bvalue, "\t ");
+
 		if(*bvalue == '=') {
 			bvalue++;
 			bvalue += strspn(bvalue, "\t ");
 		}
+
 		rstrip(bvalue);
 		buf2[len] = '\0';
 
@@ -1528,29 +1965,39 @@ static int cmd_config(int argc, char *argv[]) {
 			if(action < -1) {
 				found = true;
 				printf("%s\n", bvalue);
-			// Del
+				// Del
 			} else if(action == -1) {
 				if(!*value || !strcasecmp(bvalue, value)) {
 					removed = true;
 					continue;
 				}
-			// Set
+
+				// Set
 			} else if(action == 0) {
 				// Warn if "set" was used for variables that can occur multiple times
-				if(warnonremove && strcasecmp(bvalue, value))
+				if(warnonremove && strcasecmp(bvalue, value)) {
 					fprintf(stderr, "Warning: removing %s = %s\n", variable, bvalue);
+				}
 
 				// Already set? Delete the rest...
-				if(set)
+				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 1;
 				}
+
 				set = true;
 				continue;
+				// Add
+			} else if(action > 0) {
+				// Check if we've already seen this variable with the same value
+				if(!strcasecmp(bvalue, value)) {
+					found = true;
+				}
 			}
 		}
 
@@ -1583,7 +2030,7 @@ static int cmd_config(int argc, char *argv[]) {
 	}
 
 	// Add new variable if necessary.
-	if(action > 0 || (action == 0 && !set)) {
+	if((action > 0 && !found) || (action == 0 && !set)) {
 		if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
 			fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
 			return 1;
@@ -1591,9 +2038,12 @@ static int cmd_config(int argc, char *argv[]) {
 	}
 
 	if(action < -1) {
-		if(!found)
+		if(found) {
+			return 0;
+		} else {
 			fprintf(stderr, "No matching configuration variables found.\n");
-		return 0;
+			return 1;
+		}
 	}
 
 	// Make sure we wrote everything...
@@ -1606,42 +2056,34 @@ static int cmd_config(int argc, char *argv[]) {
 	if(action < 0 && !removed) {
 		remove(tmpfile);
 		fprintf(stderr, "No configuration variables deleted.\n");
-		return *value != 0;
+		return 1;
 	}
 
 	// Replace the configuration file with the new one
 #ifdef HAVE_MINGW
+
 	if(remove(filename)) {
 		fprintf(stderr, "Error replacing file %s: %s\n", filename, strerror(errno));
 		return 1;
 	}
+
 #endif
+
 	if(rename(tmpfile, filename)) {
 		fprintf(stderr, "Error renaming temporary file %s to configuration file %s: %s\n", tmpfile, filename, strerror(errno));
 		return 1;
 	}
 
 	// Silently try notifying a running tincd of changes.
-	if(connect_tincd(false))
+	if(connect_tincd(false)) {
 		sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
-
-	return 0;
-}
-
-bool check_id(const char *name) {
-	if(!name || !*name)
-		return false;
-
-	for(int i = 0; i < strlen(name); i++) {
-		if(!isalnum(name[i]) && name[i] != '_')
-			return false;
 	}
 
-	return true;
+	return 0;
 }
 
 static bool try_bind(int port) {
-	struct addrinfo *ai = NULL;
+	struct addrinfo *ai = NULL, *aip;
 	struct addrinfo hint = {
 		.ai_flags = AI_PASSIVE,
 		.ai_family = AF_UNSPEC,
@@ -1649,40 +2091,52 @@ static bool try_bind(int port) {
 		.ai_protocol = IPPROTO_TCP,
 	};
 
+	bool success = true;
 	char portstr[16];
-	snprintf(portstr, sizeof portstr, "%d", port);
+	snprintf(portstr, sizeof(portstr), "%d", port);
 
-	if(getaddrinfo(NULL, portstr, &hint, &ai) || !ai)
+	if(getaddrinfo(NULL, portstr, &hint, &ai) || !ai) {
 		return false;
+	}
 
-	while(ai) {
+	for(aip = ai; aip; aip = aip->ai_next) {
 		int fd = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
-		if(!fd)
-			return false;
+
+		if(!fd) {
+			success = false;
+			break;
+		}
+
 		int result = bind(fd, ai->ai_addr, ai->ai_addrlen);
 		closesocket(fd);
-		if(result)
-			return false;
-		ai = ai->ai_next;
+
+		if(result) {
+			success = false;
+			break;
+		}
 	}
 
-	return true;
+	freeaddrinfo(ai);
+	return success;
 }
 
 int check_port(char *name) {
-	if(try_bind(655))
+	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);
+			char filename[PATH_MAX];
+			snprintf(filename, sizeof(filename), "%s" SLASH "hosts" SLASH "%s", confbase, name);
 			FILE *f = fopen(filename, "a");
-			free(filename);
+
 			if(!f) {
+				fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno));
 				fprintf(stderr, "Please change tinc's Port manually.\n");
 				return 0;
 			}
@@ -1710,17 +2164,20 @@ static int cmd_init(int argc, char *argv[]) {
 	} else if(argc < 2) {
 		if(tty) {
 			char buf[1024];
-			fprintf(stdout, "Enter the Name you want your tinc node to have: ");
-			fflush(stdout);
-			if(!fgets(buf, sizeof buf, stdin)) {
+			fprintf(stderr, "Enter the Name you want your tinc node to have: ");
+
+			if(!fgets(buf, sizeof(buf), stdin)) {
 				fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
 				return 1;
 			}
+
 			int len = rstrip(buf);
+
 			if(!len) {
 				fprintf(stderr, "No name given!\n");
 				return 1;
 			}
+
 			name = strdup(buf);
 		} else {
 			fprintf(stderr, "No Name given!\n");
@@ -1728,6 +2185,7 @@ static int cmd_init(int argc, char *argv[]) {
 		}
 	} else {
 		name = strdup(argv[1]);
+
 		if(!*name) {
 			fprintf(stderr, "No Name given!\n");
 			return 1;
@@ -1755,6 +2213,7 @@ static int cmd_init(int argc, char *argv[]) {
 	}
 
 	FILE *f = fopen(tinc_conf, "w");
+
 	if(!f) {
 		fprintf(stderr, "Could not create file %s: %s\n", tinc_conf, strerror(errno));
 		return 1;
@@ -1763,23 +2222,36 @@ static int cmd_init(int argc, char *argv[]) {
 	fprintf(f, "Name = %s\n", name);
 	fclose(f);
 
-	if(!rsa_keygen(2048, false) || !ecdsa_keygen(false))
+#ifndef DISABLE_LEGACY
+
+	if(!rsa_keygen(2048, false)) {
 		return 1;
+	}
 
-	check_port(name);
+#endif
+
+	if(!ed25519_keygen(false)) {
+		return 1;
+	}
+
+	check_port(name);
 
 #ifndef HAVE_MINGW
-	char *filename;
-	xasprintf(&filename, "%s" SLASH "tinc-up", confbase);
+	char filename[PATH_MAX];
+	snprintf(filename, sizeof(filename), "%s" SLASH "tinc-up", confbase);
+
 	if(access(filename, F_OK)) {
 		FILE *f = fopenmask(filename, "w", 0777);
+
 		if(!f) {
 			fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
 			return 1;
 		}
-		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;
@@ -1787,39 +2259,62 @@ static int cmd_init(int argc, char *argv[]) {
 }
 
 static int cmd_generate_keys(int argc, char *argv[]) {
+#ifdef DISABLE_LEGACY
+
+	if(argc > 1) {
+#else
+
 	if(argc > 2) {
+#endif
 		fprintf(stderr, "Too many arguments!\n");
 		return 1;
 	}
 
-	if(!name)
+	if(!name) {
 		name = get_my_name(false);
+	}
+
+#ifndef DISABLE_LEGACY
+
+	if(!rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true)) {
+		return 1;
+	}
 
-	return !(rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true) && ecdsa_keygen(true));
+#endif
+
+	if(!ed25519_keygen(true)) {
+		return 1;
+	}
+
+	return 0;
 }
 
+#ifndef DISABLE_LEGACY
 static int cmd_generate_rsa_keys(int argc, char *argv[]) {
 	if(argc > 2) {
 		fprintf(stderr, "Too many arguments!\n");
 		return 1;
 	}
 
-	if(!name)
+	if(!name) {
 		name = get_my_name(false);
+	}
 
 	return !rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true);
 }
+#endif
 
-static int cmd_generate_ecdsa_keys(int argc, char *argv[]) {
+static int cmd_generate_ed25519_keys(int argc, char *argv[]) {
 	if(argc > 1) {
 		fprintf(stderr, "Too many arguments!\n");
 		return 1;
 	}
 
-	if(!name)
+	if(!name) {
 		name = get_my_name(false);
+	}
 
-	return !ecdsa_keygen(true);
+	return !ed25519_keygen(true);
 }
 
 static int cmd_help(int argc, char *argv[]) {
@@ -1843,8 +2338,9 @@ static int cmd_info(int argc, char *argv[]) {
 		return 1;
 	}
 
-	if(!connect_tincd(true))
+	if(!connect_tincd(true)) {
 		return 1;
+	}
 
 	return info(fd, argv[1]);
 }
@@ -1866,12 +2362,12 @@ static int cmd_edit(int argc, char *argv[]) {
 		return 1;
 	}
 
-	char *filename = NULL;
+	char filename[PATH_MAX] = "";
 
 	if(strncmp(argv[1], "hosts" SLASH, 6)) {
 		for(int i = 0; conffiles[i]; i++) {
 			if(!strcmp(argv[1], conffiles[i])) {
-				xasprintf(&filename, "%s" SLASH "%s", confbase, argv[1]);
+				snprintf(filename, sizeof(filename), "%s" SLASH "%s", confbase, argv[1]);
 				break;
 			}
 		}
@@ -1879,11 +2375,13 @@ static int cmd_edit(int argc, char *argv[]) {
 		argv[1] += 6;
 	}
 
-	if(!filename) {
-		xasprintf(&filename, "%s" SLASH "%s", hosts_dir, argv[1]);
+	if(!*filename) {
+		snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, argv[1]);
 		char *dash = strchr(argv[1], '-');
+
 		if(dash) {
 			*dash++ = 0;
+
 			if((strcmp(dash, "up") && strcmp(dash, "down")) || !check_id(argv[1])) {
 				fprintf(stderr, "Invalid configuration filename.\n");
 				return 1;
@@ -1893,25 +2391,30 @@ static int cmd_edit(int argc, char *argv[]) {
 
 	char *command;
 #ifndef HAVE_MINGW
-	xasprintf(&command, "\"%s\" \"%s\"", getenv("VISUAL") ?: getenv("EDITOR") ?: "vi", filename);
+	xasprintf(&command, "\"%s\" \"%s\"", getenv("VISUAL") ? : getenv("EDITOR") ? : "vi", filename);
 #else
 	xasprintf(&command, "edit \"%s\"", filename);
 #endif
 	int result = system(command);
-	if(result)
+	free(command);
+
+	if(result) {
 		return result;
+	}
 
 	// Silently try notifying a running tincd of changes.
-	if(connect_tincd(false))
+	if(connect_tincd(false)) {
 		sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
+	}
 
 	return 0;
 }
 
 static int export(const char *name, FILE *out) {
-	char *filename;
-	xasprintf(&filename, "%s" SLASH "%s", hosts_dir, name);
+	char filename[PATH_MAX];
+	snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, name);
 	FILE *in = fopen(filename, "r");
+
 	if(!in) {
 		fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
 		return 1;
@@ -1919,9 +2422,11 @@ static int export(const char *name, FILE *out) {
 
 	fprintf(out, "Name = %s\n", name);
 	char buf[4096];
-	while(fgets(buf, sizeof buf, in)) {
-		if(strcspn(buf, "\t =") != 4 || strncasecmp(buf, "Name", 4))
+
+	while(fgets(buf, sizeof(buf), in)) {
+		if(strcspn(buf, "\t =") != 4 || strncasecmp(buf, "Name", 4)) {
 			fputs(buf, out);
+		}
 	}
 
 	if(ferror(in)) {
@@ -1941,12 +2446,16 @@ static int cmd_export(int argc, char *argv[]) {
 	}
 
 	char *name = get_my_name(true);
-	if(!name)
+
+	if(!name) {
 		return 1;
+	}
 
 	int result = export(name, stdout);
-	if(!tty)
+
+	if(!tty) {
 		fclose(stdout);
+	}
 
 	free(name);
 	return result;
@@ -1959,6 +2468,7 @@ static int cmd_export_all(int argc, char *argv[]) {
 	}
 
 	DIR *dir = opendir(hosts_dir);
+
 	if(!dir) {
 		fprintf(stderr, "Could not open host configuration directory %s: %s\n", hosts_dir, strerror(errno));
 		return 1;
@@ -1969,20 +2479,25 @@ static int cmd_export_all(int argc, char *argv[]) {
 	struct dirent *ent;
 
 	while((ent = readdir(dir))) {
-		if(!check_id(ent->d_name))
+		if(!check_id(ent->d_name)) {
 			continue;
+		}
 
-		if(first)
+		if(first) {
 			first = false;
-		else
+		} else {
 			printf("#---------------------------------------------------------------#\n");
+		}
 
 		result |= export(ent->d_name, stdout);
 	}
 
 	closedir(dir);
-	if(!tty)
+
+	if(!tty) {
 		fclose(stdout);
+	}
+
 	return result;
 }
 
@@ -1997,12 +2512,12 @@ static int cmd_import(int argc, char *argv[]) {
 
 	char buf[4096];
 	char name[4096];
-	char *filename = NULL;
+	char filename[PATH_MAX] = "";
 	int count = 0;
 	bool firstline = true;
 
-	while(fgets(buf, sizeof buf, in)) {
-		if(sscanf(buf, "Name = %s", name) == 1) {
+	while(fgets(buf, sizeof(buf), in)) {
+		if(sscanf(buf, "Name = %4095s", name) == 1) {
 			firstline = false;
 
 			if(!check_id(name)) {
@@ -2010,11 +2525,11 @@ static int cmd_import(int argc, char *argv[]) {
 				return 1;
 			}
 
-			if(out)
+			if(out) {
 				fclose(out);
+			}
 
-			free(filename);
-			xasprintf(&filename, "%s" SLASH "%s", hosts_dir, name);
+			snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, name);
 
 			if(!force && !access(filename, F_OK)) {
 				fprintf(stderr, "Host configuration file %s already exists, skipping.\n", filename);
@@ -2023,6 +2538,7 @@ static int cmd_import(int argc, char *argv[]) {
 			}
 
 			out = fopen(filename, "w");
+
 			if(!out) {
 				fprintf(stderr, "Error creating configuration file %s: %s\n", filename, strerror(errno));
 				return 1;
@@ -2036,8 +2552,9 @@ static int cmd_import(int argc, char *argv[]) {
 		}
 
 
-		if(!strcmp(buf, "#---------------------------------------------------------------#\n"))
+		if(!strcmp(buf, "#---------------------------------------------------------------#\n")) {
 			continue;
+		}
 
 		if(out) {
 			if(fputs(buf, out) < 0) {
@@ -2047,8 +2564,9 @@ static int cmd_import(int argc, char *argv[]) {
 		}
 	}
 
-	if(out)
+	if(out) {
 		fclose(out);
+	}
 
 	if(count) {
 		fprintf(stderr, "Imported %d host configuration files.\n", count);
@@ -2060,11 +2578,349 @@ static int cmd_import(int argc, char *argv[]) {
 }
 
 static int cmd_exchange(int argc, char *argv[]) {
-	return cmd_export(argc, argv) ?: cmd_import(argc, argv);
+	return cmd_export(argc, argv) ? : cmd_import(argc, argv);
 }
 
 static int cmd_exchange_all(int argc, char *argv[]) {
-	return cmd_export_all(argc, argv) ?: cmd_import(argc, argv);
+	return cmd_export_all(argc, argv) ? : cmd_import(argc, argv);
+}
+
+static int switch_network(char *name) {
+	if(strcmp(name, ".")) {
+		if(!check_netname(name, false)) {
+			fprintf(stderr, "Invalid character in netname!\n");
+			return 1;
+		}
+
+		if(!check_netname(name, true)) {
+			fprintf(stderr, "Warning: unsafe character in netname!\n");
+		}
+	}
+
+	if(fd >= 0) {
+		close(fd);
+		fd = -1;
+	}
+
+	free_names();
+	netname = strcmp(name, ".") ? xstrdup(name) : NULL;
+	make_names(false);
+
+	free(tinc_conf);
+	free(hosts_dir);
+	free(prompt);
+
+	xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
+	xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
+	xasprintf(&prompt, "%s> ", identname);
+
+	return 0;
+}
+
+static int cmd_network(int argc, char *argv[]) {
+	if(argc > 2) {
+		fprintf(stderr, "Too many arguments!\n");
+		return 1;
+	}
+
+	if(argc == 2) {
+		return switch_network(argv[1]);
+	}
+
+	DIR *dir = opendir(confdir);
+
+	if(!dir) {
+		fprintf(stderr, "Could not read directory %s: %s\n", confdir, strerror(errno));
+		return 1;
+	}
+
+	struct dirent *ent;
+
+	while((ent = readdir(dir))) {
+		if(*ent->d_name == '.') {
+			continue;
+		}
+
+		if(!strcmp(ent->d_name, "tinc.conf")) {
+			printf(".\n");
+			continue;
+		}
+
+		char fname[PATH_MAX];
+		snprintf(fname, sizeof(fname), "%s/%s/tinc.conf", confdir, ent->d_name);
+
+		if(!access(fname, R_OK)) {
+			printf("%s\n", ent->d_name);
+		}
+	}
+
+	closedir(dir);
+
+	return 0;
+}
+
+static int cmd_fsck(int argc, char *argv[]) {
+	if(argc > 1) {
+		fprintf(stderr, "Too many arguments!\n");
+		return 1;
+	}
+
+	return fsck(orig_argv[0]);
+}
+
+static void *readfile(FILE *in, size_t *len) {
+	size_t count = 0;
+	size_t alloced = 4096;
+	char *buf = xmalloc(alloced);
+
+	while(!feof(in)) {
+		size_t read = fread(buf + count, 1, alloced - count, in);
+
+		if(!read) {
+			break;
+		}
+
+		count += read;
+
+		if(count >= alloced) {
+			alloced *= 2;
+			buf = xrealloc(buf, alloced);
+		}
+	}
+
+	if(len) {
+		*len = count;
+	}
+
+	return buf;
+}
+
+static int cmd_sign(int argc, char *argv[]) {
+	if(argc > 2) {
+		fprintf(stderr, "Too many arguments!\n");
+		return 1;
+	}
+
+	if(!name) {
+		name = get_my_name(true);
+
+		if(!name) {
+			return 1;
+		}
+	}
+
+	char fname[PATH_MAX];
+	snprintf(fname, sizeof(fname), "%s" SLASH "ed25519_key.priv", confbase);
+	FILE *fp = fopen(fname, "r");
+
+	if(!fp) {
+		fprintf(stderr, "Could not open %s: %s\n", fname, strerror(errno));
+		return 1;
+	}
+
+	ecdsa_t *key = ecdsa_read_pem_private_key(fp);
+
+	if(!key) {
+		fprintf(stderr, "Could not read private key from %s\n", fname);
+		fclose(fp);
+		return 1;
+	}
+
+	fclose(fp);
+
+	FILE *in;
+
+	if(argc == 2) {
+		in = fopen(argv[1], "rb");
+
+		if(!in) {
+			fprintf(stderr, "Could not open %s: %s\n", argv[1], strerror(errno));
+			ecdsa_free(key);
+			return 1;
+		}
+	} else {
+		in = stdin;
+	}
+
+	size_t len;
+	char *data = readfile(in, &len);
+
+	if(in != stdin) {
+		fclose(in);
+	}
+
+	if(!data) {
+		fprintf(stderr, "Error reading %s: %s\n", argv[1], strerror(errno));
+		ecdsa_free(key);
+		return 1;
+	}
+
+	// Ensure we sign our name and current time as well
+	long t = time(NULL);
+	char *trailer;
+	xasprintf(&trailer, " %s %ld", name, t);
+	int trailer_len = strlen(trailer);
+
+	data = xrealloc(data, len + trailer_len);
+	memcpy(data + len, trailer, trailer_len);
+	free(trailer);
+
+	char sig[87];
+
+	if(!ecdsa_sign(key, data, len + trailer_len, sig)) {
+		fprintf(stderr, "Error generating signature\n");
+		free(data);
+		ecdsa_free(key);
+		return 1;
+	}
+
+	b64encode(sig, sig, 64);
+	ecdsa_free(key);
+
+	fprintf(stdout, "Signature = %s %ld %s\n", name, t, sig);
+	fwrite(data, len, 1, stdout);
+
+	free(data);
+	return 0;
+}
+
+static int cmd_verify(int argc, char *argv[]) {
+	if(argc < 2) {
+		fprintf(stderr, "Not enough arguments!\n");
+		return 1;
+	}
+
+	if(argc > 3) {
+		fprintf(stderr, "Too many arguments!\n");
+		return 1;
+	}
+
+	char *node = argv[1];
+
+	if(!strcmp(node, ".")) {
+		if(!name) {
+			name = get_my_name(true);
+
+			if(!name) {
+				return 1;
+			}
+		}
+
+		node = name;
+	} else if(!strcmp(node, "*")) {
+		node = NULL;
+	} else {
+		if(!check_id(node)) {
+			fprintf(stderr, "Invalid node name\n");
+			return 1;
+		}
+	}
+
+	FILE *in;
+
+	if(argc == 3) {
+		in = fopen(argv[2], "rb");
+
+		if(!in) {
+			fprintf(stderr, "Could not open %s: %s\n", argv[2], strerror(errno));
+			return 1;
+		}
+	} else {
+		in = stdin;
+	}
+
+	size_t len;
+	char *data = readfile(in, &len);
+
+	if(in != stdin) {
+		fclose(in);
+	}
+
+	if(!data) {
+		fprintf(stderr, "Error reading %s: %s\n", argv[1], strerror(errno));
+		return 1;
+	}
+
+	char *newline = memchr(data, '\n', len);
+
+	if(!newline || (newline - data > MAX_STRING_SIZE - 1)) {
+		fprintf(stderr, "Invalid input\n");
+		free(data);
+		return 1;
+	}
+
+	*newline++ = '\0';
+	size_t skip = newline - data;
+
+	char signer[MAX_STRING_SIZE] = "";
+	char sig[MAX_STRING_SIZE] = "";
+	long t = 0;
+
+	if(sscanf(data, "Signature = %s %ld %s", signer, &t, sig) != 3 || strlen(sig) != 86 || !t || !check_id(signer)) {
+		fprintf(stderr, "Invalid input\n");
+		free(data);
+		return 1;
+	}
+
+	if(node && strcmp(node, signer)) {
+		fprintf(stderr, "Signature is not made by %s\n", node);
+		free(data);
+		return 1;
+	}
+
+	if(!node) {
+		node = signer;
+	}
+
+	char *trailer;
+	xasprintf(&trailer, " %s %ld", signer, t);
+	int trailer_len = strlen(trailer);
+
+	data = xrealloc(data, len + trailer_len);
+	memcpy(data + len, trailer, trailer_len);
+	free(trailer);
+
+	newline = data + skip;
+
+	char fname[PATH_MAX];
+	snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, node);
+	FILE *fp = fopen(fname, "r");
+
+	if(!fp) {
+		fprintf(stderr, "Could not open %s: %s\n", fname, strerror(errno));
+		free(data);
+		return 1;
+	}
+
+	ecdsa_t *key = get_pubkey(fp);
+
+	if(!key) {
+		rewind(fp);
+		key = ecdsa_read_pem_public_key(fp);
+	}
+
+	if(!key) {
+		fprintf(stderr, "Could not read public key from %s\n", fname);
+		fclose(fp);
+		free(data);
+		return 1;
+	}
+
+	fclose(fp);
+
+	if(b64decode(sig, sig, 86) != 64 || !ecdsa_verify(key, newline, len + trailer_len - (newline - data), sig)) {
+		fprintf(stderr, "Invalid signature\n");
+		free(data);
+		ecdsa_free(key);
+		return 1;
+	}
+
+	ecdsa_free(key);
+
+	fwrite(newline, len - (newline - data), 1, stdout);
+
+	free(data);
+	return 0;
 }
 
 static const struct {
@@ -2077,6 +2933,7 @@ static const struct {
 	{"restart", cmd_restart},
 	{"reload", cmd_reload},
 	{"dump", cmd_dump},
+	{"list", cmd_dump},
 	{"purge", cmd_purge},
 	{"debug", cmd_debug},
 	{"retry", cmd_retry},
@@ -2093,8 +2950,10 @@ static const struct {
 	{"set", cmd_config},
 	{"init", cmd_init},
 	{"generate-keys", cmd_generate_keys},
+#ifndef DISABLE_LEGACY
 	{"generate-rsa-keys", cmd_generate_rsa_keys},
-	{"generate-ecdsa-keys", cmd_generate_ecdsa_keys},
+#endif
+	{"generate-ed25519-keys", cmd_generate_ed25519_keys},
 	{"help", cmd_help},
 	{"version", cmd_version},
 	{"info", cmd_info},
@@ -2106,6 +2965,10 @@ static const struct {
 	{"exchange-all", cmd_exchange_all},
 	{"invite", cmd_invite},
 	{"join", cmd_join},
+	{"network", cmd_network},
+	{"fsck", cmd_fsck},
+	{"sign", cmd_sign},
+	{"verify", cmd_verify},
 	{NULL, NULL},
 };
 
@@ -2113,14 +2976,17 @@ static const struct {
 static char *complete_command(const char *text, int state) {
 	static int i;
 
-	if(!state)
+	if(!state) {
 		i = 0;
-	else
+	} else {
 		i++;
+	}
 
 	while(commands[i].command) {
-		if(!commands[i].hidden && !strncasecmp(commands[i].command, text, strlen(text)))
+		if(!commands[i].hidden && !strncasecmp(commands[i].command, text, strlen(text))) {
 			return xstrdup(commands[i].command);
+		}
+
 		i++;
 	}
 
@@ -2131,14 +2997,17 @@ static char *complete_dump(const char *text, int state) {
 	const char *matches[] = {"reachable", "nodes", "edges", "subnets", "connections", "graph", NULL};
 	static int i;
 
-	if(!state)
+	if(!state) {
 		i = 0;
-	else
+	} else {
 		i++;
+	}
 
 	while(matches[i]) {
-		if(!strncasecmp(matches[i], text, strlen(text)))
+		if(!strncasecmp(matches[i], text, strlen(text))) {
 			return xstrdup(matches[i]);
+		}
+
 		i++;
 	}
 
@@ -2148,13 +3017,15 @@ static char *complete_dump(const char *text, int state) {
 static char *complete_config(const char *text, int state) {
 	static int i;
 
-	if(!state)
+	if(!state) {
 		i = 0;
-	else
+	} else {
 		i++;
+	}
 
 	while(variables[i].name) {
 		char *dot = strchr(text, '.');
+
 		if(dot) {
 			if((variables[i].type & VAR_HOST) && !strncasecmp(variables[i].name, dot + 1, strlen(dot + 1))) {
 				char *match;
@@ -2162,9 +3033,11 @@ static char *complete_config(const char *text, int state) {
 				return match;
 			}
 		} else {
-			if(!strncasecmp(variables[i].name, text, strlen(text)))
+			if(!strncasecmp(variables[i].name, text, strlen(text))) {
 				return xstrdup(variables[i].name);
+			}
 		}
+
 		i++;
 	}
 
@@ -2173,24 +3046,31 @@ static char *complete_config(const char *text, int state) {
 
 static char *complete_info(const char *text, int state) {
 	static int i;
+
 	if(!state) {
 		i = 0;
-		if(!connect_tincd(false))
+
+		if(!connect_tincd(false)) {
 			return NULL;
+		}
+
 		// Check the list of nodes
 		sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
 		sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
 	}
 
-	while(recvline(fd, line, sizeof line)) {
+	while(recvline(fd, line, sizeof(line))) {
 		char item[4096];
-		int n = sscanf(line, "%d %d %s", &code, &req, item);
+		int n = sscanf(line, "%d %d %4095s", &code, &req, item);
+
 		if(n == 2) {
 			i++;
-			if(i >= 2)
+
+			if(i >= 2) {
 				break;
-			else
+			} else {
 				continue;
+			}
 		}
 
 		if(n != 3) {
@@ -2198,8 +3078,9 @@ static char *complete_info(const char *text, int state) {
 			break;
 		}
 
-		if(!strncmp(item, text, strlen(text)))
+		if(!strncmp(item, text, strlen(text))) {
 			return xstrdup(strip_weight(item));
+		}
 	}
 
 	return NULL;
@@ -2209,39 +3090,40 @@ static char *complete_nothing(const char *text, int state) {
 	return NULL;
 }
 
-static char **completion (const char *text, int start, int end) {
+static char **completion(const char *text, int start, int end) {
 	char **matches = NULL;
 
-	if(!start)
+	if(!start) {
 		matches = rl_completion_matches(text, complete_command);
-	else if(!strncasecmp(rl_line_buffer, "dump ", 5))
+	} else if(!strncasecmp(rl_line_buffer, "dump ", 5)) {
 		matches = rl_completion_matches(text, complete_dump);
-	else if(!strncasecmp(rl_line_buffer, "add ", 4))
+	} else if(!strncasecmp(rl_line_buffer, "add ", 4)) {
 		matches = rl_completion_matches(text, complete_config);
-	else if(!strncasecmp(rl_line_buffer, "del ", 4))
+	} else if(!strncasecmp(rl_line_buffer, "del ", 4)) {
 		matches = rl_completion_matches(text, complete_config);
-	else if(!strncasecmp(rl_line_buffer, "get ", 4))
+	} else if(!strncasecmp(rl_line_buffer, "get ", 4)) {
 		matches = rl_completion_matches(text, complete_config);
-	else if(!strncasecmp(rl_line_buffer, "set ", 4))
+	} else if(!strncasecmp(rl_line_buffer, "set ", 4)) {
 		matches = rl_completion_matches(text, complete_config);
-	else if(!strncasecmp(rl_line_buffer, "info ", 5))
+	} else if(!strncasecmp(rl_line_buffer, "info ", 5)) {
 		matches = rl_completion_matches(text, complete_info);
+	}
 
 	return matches;
 }
 #endif
 
 static int cmd_shell(int argc, char *argv[]) {
-	char *prompt;
 	xasprintf(&prompt, "%s> ", identname);
 	int result = 0;
 	char buf[4096];
 	char *line = NULL;
 	int maxargs = argc + 16;
-	char **nargv = xmalloc(maxargs * sizeof *nargv);
+	char **nargv = xmalloc(maxargs * sizeof(*nargv));
 
-	for(int i = 0; i < argc; i++)
+	for(int i = 0; i < argc; i++) {
 		nargv[i] = argv[i];
+	}
 
 #ifdef HAVE_READLINE
 	rl_readline_name = "tinc";
@@ -2253,30 +3135,38 @@ static int cmd_shell(int argc, char *argv[]) {
 
 	while(true) {
 #ifdef HAVE_READLINE
+
 		if(tty) {
 			free(copy);
 			free(line);
 			rl_basic_word_break_characters = "\t\n ";
 			line = readline(prompt);
-			if(line)
+
+			if(line) {
 				copy = xstrdup(line);
+			}
 		} else {
-			line = fgets(buf, sizeof buf, stdin);
+			line = fgets(buf, sizeof(buf), stdin);
 		}
+
 #else
-		if(tty)
+
+		if(tty) {
 			fputs(prompt, stdout);
+		}
 
-		line = fgets(buf, sizeof buf, stdin);
+		line = fgets(buf, sizeof(buf), stdin);
 #endif
 
-		if(!line)
+		if(!line) {
 			break;
+		}
 
 		/* Ignore comments */
 
-		if(*line == '#')
+		if(*line == '#') {
 			continue;
+		}
 
 		/* Split */
 
@@ -2286,10 +3176,8 @@ static int cmd_shell(int argc, char *argv[]) {
 
 		while(p && *p) {
 			if(nargc >= maxargs) {
-				fprintf(stderr, "next %p '%s', p %p '%s'\n", next, next, p, p);
-				abort();
 				maxargs *= 2;
-				nargv = xrealloc(nargv, maxargs * sizeof *nargv);
+				nargv = xrealloc(nargv, maxargs * sizeof(*nargv));
 			}
 
 			nargv[nargc++] = p;
@@ -2297,11 +3185,14 @@ static int cmd_shell(int argc, char *argv[]) {
 			next = strtok(NULL, " \t\n");
 		}
 
-		if(nargc == argc)
+		if(nargc == argc) {
 			continue;
+		}
 
-		if(!strcasecmp(nargv[argc], "exit") || !strcasecmp(nargv[argc], "quit"))
+		if(!strcasecmp(nargv[argc], "exit") || !strcasecmp(nargv[argc], "quit")) {
+			free(nargv);
 			return result;
+		}
 
 		bool found = false;
 
@@ -2314,8 +3205,11 @@ static int cmd_shell(int argc, char *argv[]) {
 		}
 
 #ifdef HAVE_READLINE
-		if(tty && found)
+
+		if(tty && found) {
 			add_history(copy);
+		}
+
 #endif
 
 		if(!found) {
@@ -2326,8 +3220,10 @@ static int cmd_shell(int argc, char *argv[]) {
 
 	free(nargv);
 
-	if(tty)
+	if(tty) {
 		printf("\n");
+	}
+
 	return result;
 }
 
@@ -2336,11 +3232,13 @@ int main(int argc, char *argv[]) {
 	program_name = argv[0];
 	orig_argv = argv;
 	orig_argc = argc;
+	tty = isatty(0) && isatty(1);
 
-	if(!parse_options(argc, argv))
+	if(!parse_options(argc, argv)) {
 		return 1;
+	}
 
-	make_names();
+	make_names(false);
 	xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
 	xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
 
@@ -2361,19 +3259,20 @@ int main(int argc, char *argv[]) {
 		fprintf(stderr, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
 		return false;
 	}
+
 #endif
 
 	srand(time(NULL));
 	crypto_init();
 
-	tty = isatty(0) && isatty(1);
-
-	if(optind >= argc)
+	if(optind >= argc) {
 		return cmd_shell(argc, argv);
+	}
 
 	for(int i = 0; commands[i].command; i++) {
-		if(!strcasecmp(argv[optind], commands[i].command))
+		if(!strcasecmp(argv[optind], commands[i].command)) {
 			return commands[i].function(argc - optind, argv + optind);
+		}
 	}
 
 	fprintf(stderr, "Unknown command `%s'.\n", argv[optind]);