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-rw-r--r--lladdr.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/lladdr.c b/lladdr.c
new file mode 100644
index 0000000..d6fb0a6
--- /dev/null
+++ b/lladdr.c
@@ -0,0 +1,58 @@
+/*
+ * Support routine for configuring link layer address
+ */
+
+#ifdef WIN32
+#include "config-win32.h"
+#else
+#include "config.h"
+#endif
+
+#include "syshead.h"
+#include "error.h"
+#include "misc.h"
+
+int set_lladdr(const char *ifname, const char *lladdr,
+ const struct env_set *es)
+{
+ char cmd[256];
+
+ if (!ifname || !lladdr)
+ return -1;
+
+#if defined(TARGET_LINUX)
+#ifdef CONFIG_FEATURE_IPROUTE
+ openvpn_snprintf (cmd, sizeof (cmd),
+ IPROUTE_PATH " link set addr %s dev %s",
+ lladdr, ifname);
+#else
+ openvpn_snprintf (cmd, sizeof (cmd),
+ IFCONFIG_PATH " %s hw ether %s",
+ ifname, lladdr);
+#endif
+#elif defined(TARGET_SOLARIS)
+ openvpn_snprintf (cmd, sizeof (cmd),
+ IFCONFIG_PATH " %s ether %s",
+ ifname, lladdr);
+#elif defined(TARGET_OPENBSD)
+ openvpn_snprintf (cmd, sizeof (cmd),
+ IFCONFIG_PATH " %s lladdr %s",
+ ifname, lladdr);
+#elif defined(TARGET_DARWIN)
+ openvpn_snprintf (cmd, sizeof (cmd),
+ IFCONFIG_PATH " %s lladdr %s",
+ ifname, lladdr);
+#elif defined(TARGET_FREEBSD)
+ openvpn_snprintf (cmd, sizeof (cmd),
+ IFCONFIG_PATH " %s ether %s",
+ ifname, lladdr);
+#else
+ msg (M_WARN, "Sorry, but I don't know how to configure link layer addresses on this operating system.");
+ return -1;
+#endif
+
+ int r = system_check (cmd, es, M_WARN, "ERROR: Unable to set link layer address.");
+ if (r)
+ msg (M_INFO, "TUN/TAP link layer address set to %s", lladdr);
+ return r;
+}