Release 0.3.1

CHANGELOG

@@ -0,0 +1,18 @@
+
+iodine - IP over DNS is now easy
+
+   http://code.kryo.se/iodine
+
+********************************
+
+CHANGES:
+
+2006-07-11: 0.3.1 
+	- Add Mac OSX support
+	- Add setting device name
+	- Use compression of domain name in reply (should allow setting MTU 
+		approx 200 bytes higher)
+
+2006-06-24: 0.3.0
+	- First public release
+	- Support for Linux, FreeBSD, OpenBSD

README

@@ -61,9 +61,10 @@ possible to allow maximum throughput.
 
 PORTABILITY:
 
-iodine has been tested on Linux (x86 and SPARC64), FreeBSD (x86) and 
-OpenBSD (x86). It should work on other unix-like systems as well that has 
-TUN/TAP tunneling support. Let us know if you get it to run on other platforms. 
+iodine has been tested on Linux (x86 and SPARC64), FreeBSD (x86), OpenBSD (x86)
+and MacOS X (10.3, ppc, with http://www-user.rhrk.uni-kl.de/~nissler/tuntap/).
+It should work on other unix-like systems as well that has TUN/TAP tunneling
+support. Let us know if you get it to run on other platforms. 
 
 
 THE NAME:

dns.c

@@ -19,11 +19,15 @@
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <arpa/nameser.h>
+#ifdef DARWIN
+#include <arpa/nameser8_compat.h>
+#endif
 #include <netdb.h>
 #include <time.h>
 #include <err.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdint.h>
 #include <unistd.h>
 #include <string.h>
 #include <ctype.h>
@@ -352,7 +356,6 @@ dns_read(int fd, char *buf, int buflen)
 	return 0;
 }
 
-
 static int
 host2dns(const char *host, char *buffer, int size)
 {
@@ -386,6 +389,7 @@ dnsd_send(int fd, struct query *q, char *data, int datalen)
 	int len;
 	char *p;
 	char buf[64*1024];
+	short name;
 	HEADER *header;
 
 	memset(buf, 0, sizeof(buf));
@@ -406,24 +410,21 @@ dnsd_send(int fd, struct query *q, char *data, int datalen)
 
 	p = buf + sizeof(HEADER);
 	
+	name = 0xc000 | ((p - buf) & 0x3fff);
 	p += host2dns(q->name, p, strlen(q->name));
 	PUTSHORT(q->type, p);
 	PUTSHORT(C_IN, p);
 	
-	p += host2dns(q->name, p, strlen(q->name));	
+	PUTSHORT(name, p);
 	PUTSHORT(q->type, p);
 	PUTSHORT(C_IN, p);
 	PUTLONG(0, p);
 
 	q->id = 0;
 
-	if(datalen > 0) {
-		PUTSHORT(datalen, p);
-		memcpy(p, data, datalen);
-		p += datalen;
-	} else {
-		PUTSHORT(0, p);
-	}
+	PUTSHORT(datalen, p);
+	memcpy(p, data, datalen);
+	p += datalen;
 
 	len = p - buf;
 	sendto(fd, buf, len, 0, (struct sockaddr*)&q->from, q->fromlen);
@@ -481,9 +482,7 @@ dnsd_read(int fd, struct query *q, char *buf, int buflen)
 	addrlen = sizeof(struct sockaddr);
 	r = recvfrom(fd, packet, sizeof(packet), 0, (struct sockaddr*)&from, &addrlen);
 
-	if(r == -1) {
-		perror("recvfrom");
-	} else {
+	if (r >= sizeof(HEADER)) {
 		header = (HEADER*)packet;
 
 		id = ntohs(header->id);
@@ -508,6 +507,8 @@ dnsd_read(int fd, struct query *q, char *buf, int buflen)
 				return decodepacket(name, buf, buflen);
 			}
 		}
+	} else {
+		perror("recvfrom");
 	}
 
 	return 0;

iodine.c

@@ -188,7 +188,7 @@ help() {
 static void
 version() {
 	printf("iodine IP over DNS tunneling client\n");
-	printf("version: 0.3\n");
+	printf("version: 0.3.1 from 2006-07-11\n");
 	exit(0);
 }
 

iodined.c

@@ -188,7 +188,7 @@ help() {
 static void
 version() {
 	printf("iodine IP over DNS tunneling server\n");
-	printf("version: 0.3\n");
+	printf("version: 0.3.1 from 2006-07-11\n");
 	exit(0);
 }
 

tun.c

@@ -57,18 +57,18 @@ open_tun(const char *tun_device)
 	ifreq.ifr_flags = IFF_TUN; 
 
 	if (tun_device != NULL) {
-			strncpy(ifreq.ifr_name, tun_device, IFNAMSIZ);
-			strncpy(if_name, tun_device, sizeof(if_name));
+		strncpy(ifreq.ifr_name, tun_device, IFNAMSIZ);
+		strncpy(if_name, tun_device, sizeof(if_name));
 
-			if (ioctl(tun_fd, TUNSETIFF, (void *) &ifreq) != -1) {
-				printf("Opened %s\n", ifreq.ifr_name);
-				return tun_fd;
-			}
+		if (ioctl(tun_fd, TUNSETIFF, (void *) &ifreq) != -1) {
+			printf("Opened %s\n", ifreq.ifr_name);
+			return tun_fd;
+		}
 
-			if (errno != EBUSY) {
-				warn("open_tun: ioctl[TUNSETIFF]: %s", strerror(errno));
-				return -1;
-			}
+		if (errno != EBUSY) {
+			warn("open_tun: ioctl[TUNSETIFF]: %s", strerror(errno));
+			return -1;
+		}
 	} else {
 		for (i = 0; i < TUN_MAX_TRY; i++) {
 			snprintf(ifreq.ifr_name, IFNAMSIZ, "dns%d", i);
@@ -85,7 +85,7 @@ open_tun(const char *tun_device)
 			}
 		}
 
-		warn("open_tun: Couldn't set interface name.\n");
+		warn("open_tun: Couldn't set interface name");
 	}
 	return -1;
 }
@@ -100,10 +100,16 @@ open_tun(const char *tun_device)
 	char tun_name[50];
 
 	if (tun_device != NULL) {
-		if ((tun_fd = open(tun_device, O_RDWR)) < 0) {
-			warn("open_tun: %s: %s", tun_device, strerror(errno));
+		snprintf(tun_name, sizeof(tun_name), "/dev/%s", tun_device);
+		strncpy(if_name, tun_device, sizeof(if_name));
+
+		if ((tun_fd = open(tun_name, O_RDWR)) < 0) {
+			warn("open_tun: %s: %s", tun_name, strerror(errno));
 			return -1;
 		}
+
+		printf("Opened %s\n", tun_name);
+		return tun_fd;
 	} else {
 		for (i = 0; i < TUN_MAX_TRY; i++) {
 			snprintf(tun_name, sizeof(tun_name), "/dev/tun%d", i);
@@ -118,7 +124,7 @@ open_tun(const char *tun_device)
 				break;
 		}
 
-		warn("open_tun: Failed to open tunneling device.");
+		warn("open_tun: Failed to open tunneling device");
 	}
 
 	return -1;
@@ -136,10 +142,10 @@ close_tun(int tun_fd)
 int 
 write_tun(int tun_fd, char *data, int len) 
 {
-#ifdef FREEBSD
+#if defined (FREEBSD) || defined (DARWIN)
 	data += 4;
 	len -= 4;
-#else /* !FREEBSD */
+#else /* !FREEBSD/DARWIN */
 #ifdef LINUX
 	data[0] = 0x00;
 	data[1] = 0x00;
@@ -163,7 +169,7 @@ write_tun(int tun_fd, char *data, int len)
 int 
 read_tun(int tun_fd, char *buf, int len) 
 {
-#ifdef FREEBSD
+#if defined (FREEBSD) || defined (DARWIN)
 	// FreeBSD has no header
 	return read(tun_fd, buf + 4, len - 4) + 4;
 #else /* !FREEBSD */