diff --git a/build.sh b/build.sh
index 1467c9a..e83a324 100755
--- a/build.sh
+++ b/build.sh
@@ -71,26 +71,24 @@ fi
 
 CFLAGS="$CFLAGS -DQT_VERSION=\"`cat version`\""
 
-echo Building combined binary...
-$cc $CFLAGS -c -DCOMBINED_BINARY	src/proto.raw.c		-o obj/proto.raw.o
-$cc $CFLAGS -c -DCOMBINED_BINARY	src/proto.nacl0.c	-o obj/proto.nacl0.o
-$cc $CFLAGS -c -DCOMBINED_BINARY	src/proto.nacltai.c	-o obj/proto.nacltai.o
-$cc $CFLAGS -c -DCOMBINED_BINARY	src/proto.salty.c	-o obj/proto.salty.o
-$cc $CFLAGS -c -DCOMBINED_BINARY	src/run.combined.c	-o obj/run.combined.o
-$cc $CFLAGS -c				src/common.c		-o obj/common.o
-$cc $CFLAGS -o out/quicktun.combined obj/common.o obj/run.combined.o obj/proto.raw.o obj/proto.nacl0.o obj/proto.nacltai.o obj/proto.salty.o -l$CRYPTLIB $LDFLAGS
-ln out/quicktun.combined out/quicktun
+echo Building binaries...
+$cc $CFLAGS -c src/proto.raw.c		-o obj/proto.raw.o
+$cc $CFLAGS -c src/proto.nacl0.c	-o obj/proto.nacl0.o
+$cc $CFLAGS -c src/proto.nacltai.c	-o obj/proto.nacltai.o
+$cc $CFLAGS -c src/proto.salty.c	-o obj/proto.salty.o
+$cc $CFLAGS -c src/main.c		-o obj/main.o
+$cc $CFLAGS -c src/common.c		-o obj/common.o
+$cc $CFLAGS -o out/quicktun obj/common.o obj/main.o obj/proto.raw.o obj/proto.nacl0.o obj/proto.nacltai.o obj/proto.salty.o -l$CRYPTLIB $LDFLAGS
+$cc $CFLAGS -o out/quicktun.keypair	src/keypair.c		obj/common.o	-l$CRYPTLIB	$LDFLAGS
 
-echo Building single protocol binaries...
-$cc $CFLAGS -o out/quicktun.raw		src/proto.raw.c				$LDFLAGS
-$cc $CFLAGS -o out/quicktun.nacl0	src/proto.nacl0.c	-l$CRYPTLIB	$LDFLAGS
-$cc $CFLAGS -o out/quicktun.nacltai	src/proto.nacltai.c	-l$CRYPTLIB	$LDFLAGS
-$cc $CFLAGS -o out/quicktun.salty	src/proto.salty.c	-l$CRYPTLIB	$LDFLAGS
-$cc $CFLAGS -o out/quicktun.keypair	src/keypair.c		-l$CRYPTLIB	$LDFLAGS
+echo Creating compatibility symlinks...
+for proto in combined raw nacl0 nacltai salty; do
+    ln -s quicktun out/quicktun.$proto
+done
 
 if [ -f /etc/network/interfaces ]; then
 	echo Building debian binary...
-	$cc $CFLAGS -c -DCOMBINED_BINARY -DDEBIAN_BINARY src/run.combined.c -o obj/run.debian.o
+	$cc $CFLAGS -c -DDEBIAN_BINARY src/main.c -o obj/run.debian.o
 	$cc $CFLAGS -o out/quicktun.debian obj/common.o obj/run.debian.o obj/proto.raw.o obj/proto.nacl0.o obj/proto.nacltai.o obj/proto.salty.o -l$CRYPTLIB $LDFLAGS
 	if [ -x /usr/bin/dpkg-deb -a -x /usr/bin/fakeroot ]; then
 		echo -n Building debian package...
diff --git a/src/common.c b/src/common.c
index dad5a39..d0da17e 100755
--- a/src/common.c
+++ b/src/common.c
@@ -23,78 +23,14 @@
    authors and should not be interpreted as representing official policies, either expressed
    or implied, of Ivo Smits.*/
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <fcntl.h>
-#include <unistd.h>
+#include "common.h"
+
 #include <pwd.h>
 #include <grp.h>
-#ifndef HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
 #include <sys/ioctl.h>
-#include <sys/socket.h>
 #include <poll.h>
 #include <netdb.h>
 #include <stdlib.h>
-#include <arpa/inet.h>
-#include <net/if.h>
-#ifdef linux
-	#include <linux/if_tun.h>
-	#include <linux/if_ether.h>
-#else
-	#define ETH_FRAME_LEN 1514
-	#include <net/if_tun.h>
-	#ifdef SOLARIS
-		#include <sys/stropts.h>
-		#include <sys/sockio.h>
-	#endif
-#endif
-
-#define MAX_PACKET_LEN (ETH_FRAME_LEN+4) //Some space for optional packet information
-
-typedef union {
-	struct sockaddr any;
-	struct sockaddr_in ip4;
-	struct sockaddr_in6 ip6;
-} sockaddr_any;
-
-struct qtsession;
-struct qtproto {
-	int encrypted;
-	int buffersize_raw;
-	int buffersize_enc;
-	int offset_raw;
-	int offset_enc;
-	int (*encode)(struct qtsession* sess, char* raw, char* enc, int len);
-	int (*decode)(struct qtsession* sess, char* enc, char* raw, int len);
-	int (*init)(struct qtsession* sess);
-	int protocol_data_size;
-	void (*idle)(struct qtsession* sess);
-};
-struct qtsession {
-	struct qtproto protocol;
-	void* protocol_data;
-	int fd_socket;
-	int fd_dev;
-	int remote_float;
-	sockaddr_any remote_addr;
-	int use_pi;
-	int poll_timeout;
-	void (*sendnetworkpacket)(struct qtsession* sess, char* msg, int len);
-};
-
-#ifdef COMBINED_BINARY
-	extern char* (*getconf)(const char*);
-	extern int errorexit(const char*);
-	extern int errorexitp(const char*);
-	extern void print_header();
-	extern void hex2bin(unsigned char*, const char*, const int);
-	extern int debug;
-	extern int qtrun(struct qtproto* p);
-	extern int qtprocessargs(int argc, char** argv);
-#else
 
 char* (*getconf)(const char*) = getenv;
 int debug = 0;
@@ -435,5 +371,3 @@ int qtprocessargs(int argc, char** argv) {
 	}
 	return 0;
 }
-#endif
-
diff --git a/src/common.h b/src/common.h
new file mode 100644
index 0000000..1c98714
--- /dev/null
+++ b/src/common.h
@@ -0,0 +1,93 @@
+/* Copyright 2010 Ivo Smits <Ivo@UCIS.nl>. All rights reserved.
+   Redistribution and use in source and binary forms, with or without modification, are
+   permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice, this list of
+      conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright notice, this list
+      of conditions and the following disclaimer in the documentation and/or other materials
+      provided with the distribution.
+
+   THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+   WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+   FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR
+   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+   ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+   ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+   The views and conclusions contained in the software and documentation are those of the
+   authors and should not be interpreted as representing official policies, either expressed
+   or implied, of Ivo Smits.*/
+
+#ifndef QT_COMMON_H_
+#define QT_COMMON_H_
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#ifdef linux
+	#include <linux/if_tun.h>
+	#include <linux/if_ether.h>
+#else
+	#define ETH_FRAME_LEN 1514
+	#include <net/if_tun.h>
+	#ifdef SOLARIS
+		#include <sys/stropts.h>
+		#include <sys/sockio.h>
+	#endif
+#endif
+
+#define MAX_PACKET_LEN (ETH_FRAME_LEN+4) //Some space for optional packet information
+
+typedef union {
+	struct sockaddr any;
+	struct sockaddr_in ip4;
+	struct sockaddr_in6 ip6;
+} sockaddr_any;
+
+struct qtsession;
+struct qtproto {
+	int encrypted;
+	int buffersize_raw;
+	int buffersize_enc;
+	int offset_raw;
+	int offset_enc;
+	int (*encode)(struct qtsession* sess, char* raw, char* enc, int len);
+	int (*decode)(struct qtsession* sess, char* enc, char* raw, int len);
+	int (*init)(struct qtsession* sess);
+	int protocol_data_size;
+	void (*idle)(struct qtsession* sess);
+};
+struct qtsession {
+	struct qtproto protocol;
+	void* protocol_data;
+	int fd_socket;
+	int fd_dev;
+	int remote_float;
+	sockaddr_any remote_addr;
+	int use_pi;
+	int poll_timeout;
+	void (*sendnetworkpacket)(struct qtsession* sess, char* msg, int len);
+};
+
+char* (*getconf)(const char*);
+int errorexit(const char*);
+int errorexitp(const char*);
+void print_header();
+void hex2bin(unsigned char*, const char*, const int);
+int debug;
+int qtrun(struct qtproto* p);
+int qtprocessargs(int argc, char** argv);
+
+#endif
diff --git a/src/keypair.c b/src/keypair.c
index 3c1854e..e05d3fb 100644
--- a/src/keypair.c
+++ b/src/keypair.c
@@ -23,7 +23,7 @@
    authors and should not be interpreted as representing official policies, either expressed
    or implied, of Ivo Smits.*/
 
-#include "common.c"
+#include "common.h"
 #include "crypto_box_curve25519xsalsa20poly1305.h"
 #include "crypto_scalarmult_curve25519.h"
 #include <time.h>
diff --git a/src/run.combined.c b/src/main.c
similarity index 76%
rename from src/run.combined.c
rename to src/main.c
index 934d4bf..7ab771f 100755
--- a/src/run.combined.c
+++ b/src/main.c
@@ -23,7 +23,7 @@
    authors and should not be interpreted as representing official policies, either expressed
    or implied, of Ivo Smits.*/
 
-#include "common.c"
+#include "common.h"
 
 extern struct qtproto qtproto_raw;
 extern struct qtproto qtproto_nacl0;
@@ -43,6 +43,24 @@ char* getenvdeb(const char* name) {
 }
 #endif
 
+const char *execproto(const char *path)
+{
+	const char* last_dot;
+	const char* last_slash;
+
+	if (!path) return NULL;
+
+	last_dot = strrchr(path, '.');
+	last_slash = strrchr(path, '/');
+	if (last_dot && (!last_slash || last_slash < last_dot)) {
+		if (strcmp(last_dot + 1, "combined") == 0) {
+			return NULL;
+		}
+		return last_dot + 1;
+	}
+	return NULL;
+}
+
 int main(int argc, char** argv) {
 	print_header();
 #ifdef DEBIAN_BINARY
@@ -51,15 +69,22 @@ int main(int argc, char** argv) {
 	getconf = getenv;
 #endif
 	if (qtprocessargs(argc, argv) < 0) return -1;
-	char* envval;
-	if ((envval = getconf("PROTOCOL"))) {
-		if (strcmp(envval, "raw") == 0) {
+	const char* proto = execproto(argv[0]);
+	const char* envval = getconf("PROTOCOL");
+	if (proto && envval) {
+	  fprintf(stderr, "Warning: ignoring PROTOCOL setting '%s' in favor single-protocol compatibility '%s'\n",
+		  envval, proto);
+	} else if (!proto) {
+	  proto = envval;
+	}
+	if (proto) {
+		if (strcmp(proto, "raw") == 0) {
 			return qtrun(&qtproto_raw);
-		} else if (strcmp(envval, "nacl0") == 0) {
+		} else if (strcmp(proto, "nacl0") == 0) {
 			return qtrun(&qtproto_nacl0);
-		} else if (strcmp(envval, "nacltai") == 0) {
+		} else if (strcmp(proto, "nacltai") == 0) {
 			return qtrun(&qtproto_nacltai);
-		} else if (strcmp(envval, "salty") == 0) {
+		} else if (strcmp(proto, "salty") == 0) {
 			return qtrun(&qtproto_salty);
 		} else {
 			return errorexit("Unknown PROTOCOL specified");
@@ -72,4 +97,3 @@ int main(int argc, char** argv) {
 		return qtrun(&qtproto_raw);
 	}
 }
-
diff --git a/src/proto.nacl0.c b/src/proto.nacl0.c
index 36a888d..9676319 100644
--- a/src/proto.nacl0.c
+++ b/src/proto.nacl0.c
@@ -23,7 +23,7 @@
    authors and should not be interpreted as representing official policies, either expressed
    or implied, of Ivo Smits.*/
 
-#include "common.c"
+#include "common.h"
 #include "crypto_box_curve25519xsalsa20poly1305.h"
 
 struct qt_proto_data_nacl0 {
@@ -95,11 +95,3 @@ struct qtproto qtproto_nacl0 = {
 	init,
 	sizeof(struct qt_proto_data_nacl0),
 };
-
-#ifndef COMBINED_BINARY
-int main(int argc, char** argv) {
-	print_header();
-	if (qtprocessargs(argc, argv) < 0) return -1;
-	return qtrun(&qtproto_nacl0);
-}
-#endif
diff --git a/src/proto.nacltai.c b/src/proto.nacltai.c
index ceb5ff9..60c22e1 100755
--- a/src/proto.nacltai.c
+++ b/src/proto.nacltai.c
@@ -23,7 +23,7 @@
    authors and should not be interpreted as representing official policies, either expressed
    or implied, of Ivo Smits.*/
 
-#include "common.c"
+#include "common.h"
 #include "crypto_box_curve25519xsalsa20poly1305.h"
 #include "crypto_scalarmult_curve25519.h"
 #include <sys/types.h>
@@ -172,11 +172,3 @@ struct qtproto qtproto_nacltai = {
 	init,
 	sizeof(struct qt_proto_data_nacltai),
 };
-
-#ifndef COMBINED_BINARY
-int main(int argc, char** argv) {
-	print_header();
-	if (qtprocessargs(argc, argv) < 0) return -1;
-	return qtrun(&qtproto_nacltai);
-}
-#endif
diff --git a/src/proto.raw.c b/src/proto.raw.c
index e6a7a2b..babab1c 100644
--- a/src/proto.raw.c
+++ b/src/proto.raw.c
@@ -23,7 +23,7 @@
    authors and should not be interpreted as representing official policies, either expressed
    or implied, of Ivo Smits.*/
 
-#include "common.c"
+#include "common.h"
 
 static int encode(struct qtsession* sess, char* raw, char* enc, int len) {
 	memcpy(enc, raw, len);
@@ -46,11 +46,3 @@ struct qtproto qtproto_raw = {
 	NULL,
 	0,
 };
-
-#ifndef COMBINED_BINARY
-int main(int argc, char** argv) {
-	print_header();
-	if (qtprocessargs(argc, argv) < 0) return -1;
-	return qtrun(&qtproto_raw);
-}
-#endif
diff --git a/src/proto.salty.c b/src/proto.salty.c
index 6981b33..d608d36 100755
--- a/src/proto.salty.c
+++ b/src/proto.salty.c
@@ -114,7 +114,7 @@ When receiving packet:
 		Write packet to tunnel
 */
 
-#include "common.c"
+#include "common.h"
 #include "crypto_box_curve25519xsalsa20poly1305.h"
 #include "crypto_scalarmult_curve25519.h"
 #include <sys/types.h>
@@ -460,11 +460,3 @@ struct qtproto qtproto_salty = {
 	sizeof(struct qt_proto_data_salty),
 	idle,
 };
-
-#ifndef COMBINED_BINARY
-int main(int argc, char** argv) {
-	print_header();
-	if (qtprocessargs(argc, argv) < 0) return -1;
-	return qtrun(&qtproto_salty);
-}
-#endif