stun

commit 39166bfc5470797db57977c1341d2c5dc35aaedc
parent 86348191f0e2e02b3eb2cb903aee30be3bb6e928
Author: sin <sin@2f30.org>
Date:   Tue, 22 Mar 2016 10:10:29 +0000

Add primitive linux support

Requires libbsd for arc4random and possibly others.

Diffstat:
M
config.mk
 | 
4
++++
M
stun.c
 | 
42
++++++++++++++++++++++++++++++++++++++++++

2 files changed, 46 insertions(+), 0 deletions(-)
diff --git a/config.mk b/config.mk
@@ -17,6 +17,10 @@ RANLIB = ranlib
 CFLAGS = -O2 -std=c99
 LDFLAGS = -lcrypto -s
 
+# linux
+#CFLAGS = -O2 -std=c99
+#LDFLAGS = -lcrypto -lbsd -s
+
 # optimized static
 #CFLAGS = -static -O2 -std=c99
 #LDFLAGS = -lcrypto -static -s
diff --git a/stun.c b/stun.c
@@ -4,7 +4,12 @@
 #include <sys/socket.h>
 
 #include <net/if.h>
+#ifdef __linux__
+#include <linux/if_tun.h>
+#include <bsd/stdlib.h>
+#else
 #include <net/if_tun.h>
+#endif
 #include <netinet/in.h>
 #include <netinet/tcp.h>
 #include <arpa/inet.h>
@@ -106,6 +111,42 @@ dummydec(EVP_CIPHER_CTX *ectx, unsigned char *plaintext,
 	return len;
 }
 
+#ifdef __linux__
+#undef explicit_bzero
+#define explicit_bzero bzero
+
+int
+opentun(char *tundev)
+{
+	struct ifreq ifr;
+	int ret, fd;
+
+	fd = open("/dev/net/tun", O_RDWR);
+	if (fd < 0)
+		err(1, "open %s", "/dev/net/tun");
+	memset(&ifr, 0, sizeof(ifr));
+	ifr.ifr_flags = IFF_TUN | IFF_NO_PI;
+	strncpy(ifr.ifr_name, tundev, IFNAMSIZ);
+	ifr.ifr_name[IFNAMSIZ - 1] = '\0';
+	ret = ioctl(fd, TUNSETIFF, &ifr);
+	if (ret < 0)
+		err(1, "ioctl: TUNSETIFF %s", tundev);
+	return fd;
+}
+
+int
+writetun(int fd, unsigned char *buf, int len)
+{
+	return write(fd, buf, len);
+}
+
+int
+readtun(int fd, unsigned char *buf, int len)
+{
+	return read(fd, buf, len);
+}
+
+#else
 int
 opentun(char *tundev)
 {
@@ -162,6 +203,7 @@ readtun(int fd, unsigned char *buf, int len)
 		return n - sizeof(type);
 	return n;
 }
+#endif
 
 void
 pack16(unsigned char *buf, uint16_t n)