1 files changed, 146 insertions, 0 deletions
diff --git a/libdnet-stripped/src/tun-bsd.c b/libdnet-stripped/src/tun-bsd.c
new file mode 100644
index 0000000..293abc8
--- /dev/null
+++ b/libdnet-stripped/src/tun-bsd.c
@@ -0,0 +1,146 @@
+/*
+ * tun-bsd.c
+ *
+ * Copyright (c) 2001 Dug Song <dugsong@monkey.org>
+ *
+ * $Id: tun-bsd.c 573 2005-02-10 23:50:04Z dugsong $
+ */
+
+#include "config.h"
+
+#include <sys/socket.h>
+#include <sys/uio.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "dnet.h"
+
+struct tun {
+	int               fd;
+	intf_t           *intf;
+	struct intf_entry save;
+};
+
+#define MAX_DEVS	16	/* XXX - max number of tunnel devices */
+
+tun_t *
+tun_open(struct addr *src, struct addr *dst, int mtu)
+{
+	struct intf_entry ifent;
+	tun_t *tun;
+	char dev[128];
+	int i;
+
+	if (src->addr_type != ADDR_TYPE_IP || dst->addr_type != ADDR_TYPE_IP ||
+	    src->addr_bits != IP_ADDR_BITS || dst->addr_bits != IP_ADDR_BITS) {
+		errno = EINVAL;
+		return (NULL);
+	}
+	if ((tun = calloc(1, sizeof(*tun))) == NULL)
+		return (NULL);
+
+	if ((tun->intf = intf_open()) == NULL)
+		return (tun_close(tun));
+
+	memset(&ifent, 0, sizeof(ifent));
+	ifent.intf_len = sizeof(ifent);
+	
+	for (i = 0; i < MAX_DEVS; i++) {
+		snprintf(dev, sizeof(dev), "/dev/tun%d", i);
+		strlcpy(ifent.intf_name, dev + 5, sizeof(ifent.intf_name));
+		tun->save = ifent;
+		
+		if ((tun->fd = open(dev, O_RDWR, 0)) != -1 &&
+		    intf_get(tun->intf, &tun->save) == 0) {
+			route_t *r;
+			struct route_entry entry;
+			
+			ifent.intf_flags = INTF_FLAG_UP|INTF_FLAG_POINTOPOINT;
+			ifent.intf_addr = *src;
+			ifent.intf_dst_addr = *dst;	
+			ifent.intf_mtu = mtu;
+			
+			if (intf_set(tun->intf, &ifent) < 0)
+				tun = tun_close(tun);
+
+			/* XXX - try to ensure our route got set */
+			if ((r = route_open()) != NULL) {
+				entry.route_dst = *dst;
+				entry.route_gw = *src;
+				route_add(r, &entry);
+				route_close(r);
+			}
+			break;
+		}
+	}
+	if (i == MAX_DEVS)
+		tun = tun_close(tun);
+	return (tun);
+}
+
+const char *
+tun_name(tun_t *tun)
+{
+	return (tun->save.intf_name);
+}
+
+int
+tun_fileno(tun_t *tun)
+{
+	return (tun->fd);
+}
+
+ssize_t
+tun_send(tun_t *tun, const void *buf, size_t size)
+{
+#ifdef __OpenBSD__
+	struct iovec iov[2];
+	uint32_t af = htonl(AF_INET);
+
+	iov[0].iov_base = &af;
+	iov[0].iov_len = sizeof(af);
+	iov[1].iov_base = (void *)buf;
+	iov[1].iov_len = size;
+	
+	return (writev(tun->fd, iov, 2));
+#else
+	return (write(tun->fd, buf, size));
+#endif
+}
+
+ssize_t
+tun_recv(tun_t *tun, void *buf, size_t size)
+{
+#ifdef __OpenBSD__
+	struct iovec iov[2];
+	uint32_t af;
+	
+	iov[0].iov_base = &af;
+	iov[0].iov_len = sizeof(af);
+	iov[1].iov_base = (void *)buf;
+	iov[1].iov_len = size;
+	
+	return (readv(tun->fd, iov, 2) - sizeof(af));
+#else
+	return (read(tun->fd, buf, size));
+#endif
+}
+
+tun_t *
+tun_close(tun_t *tun)
+{
+	if (tun->fd > 0)
+		close(tun->fd);
+	if (tun->intf != NULL) {
+		/* Restore interface configuration on close. */
+		intf_set(tun->intf, &tun->save);
+		intf_close(tun->intf);
+	}
+	free(tun);
+	return (NULL);
+}