stun

commit 10c8fe1a18c3eea120d2debf7ef93f36eec6bf5c
parent 5473685396668e081a29508c6790f74fdba0d270
Author: sin <sin@2f30.org>
Date:   Thu, 14 Apr 2016 09:12:04 +0100

add support for ipv6 over ipv4

Linux port has not been tested.

Diffstat:
M
WHATSNEW
 | 
2
+-
M
dev_bsd.c
 | 
2
+-
M
stun.8
 | 
11
++++++++---
M
stun.c
 | 
11
+++++++++--
M
stun.h
 | 
1
+

5 files changed, 20 insertions(+), 7 deletions(-)
diff --git a/WHATSNEW b/WHATSNEW
@@ -5,7 +5,7 @@
     * EVP_AEAD_* high level API support.  Choice between four
       different ciphers depending on version of libressl used.
     * Default cipher switched to chacha20-poly1305.
-    * IPv4 over IPv6 tunnel support.
+    * IPv4 over IPv6 tunnel support and vice versa.
     * TCP keepalive enabled by default.
     * Switch to non-blocking sockets for faster recovery
       when headers are modified in transit.
diff --git a/dev_bsd.c b/dev_bsd.c
@@ -46,7 +46,7 @@ int
 devwrite(int fd, unsigned char *buf, int len)
 {
 	struct iovec iov[2];
-	uint32_t type = htonl(AF_INET);
+	uint32_t type = htonl(aftype);
 	int n;
 
 	switch (devtype) {
diff --git a/stun.8 b/stun.8
@@ -1,4 +1,4 @@
-.Dd April 12, 2016
+.Dd April 14, 2016
 .Dt STUN 8
 .Os
 .Sh NAME
@@ -6,14 +6,15 @@
 .Nd simple tunnel
 .Sh SYNOPSIS
 .Nm stun
-.Op Fl d
-.Fl s
+.Op Fl 46
+.Op Fl ds
 .Op Fl b Ar address
 .Op Fl p Ar port
 .Op Fl t Ar devtype
 .Op Fl c Ar cipher
 .Ar interface
 .Nm stun
+.Op Fl 46
 .Op Fl d
 .Fl h Ar host
 .Op Fl p Ar port
@@ -27,6 +28,10 @@ client per server.  Routing between clients is done by the networking
 stack on the server side.
 .Sh OPTIONS
 .Bl -tag -width "-b address"
+.It Fl 4
+Set the tunnel address family to IPv4.
+.It Fl 6
+Set the tunnel address family to IPv6.
 .It Fl d
 Enable debug output.
 .It Fl s
diff --git a/stun.c b/stun.c
@@ -58,14 +58,15 @@ char *host;
 char *port = DEFPORT;
 char *cipher = DEFCIPHER;
 int devtype = TUNDEV;
+int aftype = AF_INET;
 int debug;
 int sflag;
 
 void
 usage(void)
 {
-	fprintf(stderr, "usage: stun [-d] -s [-b address] [-p port] [-t devtype] [-c cipher] interface\n");
-	fprintf(stderr, "       stun [-d] -h host [-p port] [-t devtype] [-c cipher] interface\n");
+	fprintf(stderr, "usage: stun [-46] [-d] -s [-b address] [-p port] [-t devtype] [-c cipher] interface\n");
+	fprintf(stderr, "       stun [-46] [-d] -h host [-p port] [-t devtype] [-c cipher] interface\n");
 	exit(1);
 }
 
@@ -77,6 +78,12 @@ main(int argc, char *argv[])
 	int devfd, listenfd, netfd;
 
 	ARGBEGIN {
+	case '4':
+		aftype = AF_INET;
+		break;
+	case '6':
+		aftype = AF_INET6;
+		break;
 	case 'd':
 		debug = 1;
 		break;
diff --git a/stun.h b/stun.h
@@ -25,6 +25,7 @@ enum {
 
 /* stun.c */
 extern int devtype;
+extern int aftype;
 extern int debug;
 
 /* auth.c */