Move common sgsnemu/ggsn files to directory "lib"

Some files like in sgsnemu and ggsn directory where exactly the same.
They are now moved to the same directory for easier maintenance

Signed-off-by: Emmanuel Bretelle <chantra@debuntu.org>

1 files changed, 74 insertions, 0 deletions

diff --git a/lib/tun.h b/lib/tun.h
new file mode 100644
index 0000000..7972c53
--- /dev/null
+++ b/lib/tun.h
@@ -0,0 +1,74 @@
+/* 
+ * TUN interface functions.
+ * Copyright (C) 2002, 2003 Mondru AB.
+ * 
+ * The contents of this file may be used under the terms of the GNU
+ * General Public License Version 2, provided that the above copyright
+ * notice and this permission notice is included in all copies or
+ * substantial portions of the software.
+ * 
+ */
+
+#ifndef _TUN_H
+#define _TUN_H
+
+#define PACKET_MAX      8196 /* Maximum packet size we receive */
+#define TUN_SCRIPTSIZE   256
+#define TUN_ADDRSIZE     128
+#define TUN_NLBUFSIZE   1024
+
+struct tun_packet_t {
+  unsigned int ver:4;
+  unsigned int ihl:4;
+  unsigned int dscp:6;
+  unsigned int ecn:2;
+  unsigned int length:16;
+  unsigned int id:16;
+  unsigned int flags:3;
+  unsigned int fragment:13;
+  unsigned int ttl:8;
+  unsigned int protocol:8;
+  unsigned int check:16;
+  unsigned int src:32;
+  unsigned int dst:32;
+};
+
+
+/* ***********************************************************
+ * Information storage for each tun instance
+ *************************************************************/
+
+struct tun_t {
+  int fd;                /* File descriptor to tun interface */
+  struct in_addr addr;
+  struct in_addr dstaddr;
+  struct in_addr netmask;
+  int addrs;             /* Number of allocated IP addresses */
+  int routes;            /* One if we allocated an automatic route */
+  char devname[IFNAMSIZ];/* Name of the tun device */
+  int (*cb_ind) (struct tun_t *tun, void *pack, unsigned len);
+};
+
+
+extern int tun_new(struct tun_t **tun);
+extern int tun_free(struct tun_t *tun);
+extern int tun_decaps(struct tun_t *this);
+extern int tun_encaps(struct tun_t *tun, void *pack, unsigned len);
+
+extern int tun_addaddr(struct tun_t *this, struct in_addr *addr,
+		       struct in_addr *dstaddr, struct in_addr *netmask);
+
+
+extern int tun_setaddr(struct tun_t *this, struct in_addr *our_adr, 
+		       struct in_addr *his_adr, struct in_addr *net_mask);
+
+int tun_addroute(struct tun_t *this, struct in_addr *dst, 
+		 struct in_addr *gateway, struct in_addr *mask);
+
+extern int tun_set_cb_ind(struct tun_t *this, 
+     int (*cb_ind) (struct tun_t *tun, void *pack, unsigned len));
+
+
+extern int tun_runscript(struct tun_t *tun, char* script);
+
+#endif	/* !_TUN_H */