Add local IP address tuning for ZeroTier.

These options are undocumented -- for now.  We need to get some
experience with them to ensure that they are worth keeping.

2 files changed, 26 insertions, 0 deletions

diff --git a/src/core/options.c b/src/core/options.c
index 3e35f44c..843b066d 100644
--- a/src/core/options.c
+++ b/src/core/options.c
@@ -202,6 +202,30 @@ nni_copyin_u64(uint64_t *up, const void *v, size_t sz, nni_opt_type t)
 }
 
 int
+nni_copyin_sockaddr(nng_sockaddr *ap, const void *v, size_t sz, nni_opt_type t)
+{
+	nng_sockaddr a;
+
+	switch (t) {
+	case NNI_TYPE_SOCKADDR:
+		a = *(nng_sockaddr *) v;
+		break;
+	case NNI_TYPE_OPAQUE:
+		if (sz != sizeof(nng_sockaddr)) {
+			return (NNG_EINVAL);
+		}
+		memcpy(&a, v, sz);
+		break;
+	default:
+		return (NNG_EBADTYPE);
+	}
+	if (ap != NULL) {
+		*ap = a;
+	}
+	return (0);
+}
+
+int
 nni_copyout(const void *src, size_t srcsz, void *dst, size_t *dstszp)
 {
 	int    rv     = 0;
diff --git a/src/core/options.h b/src/core/options.h
index 2a21a039..ac64f9e3 100644
--- a/src/core/options.h
+++ b/src/core/options.h
@@ -32,6 +32,8 @@ extern int nni_copyin_size(
 extern int nni_copyin_str(char *, const void *, size_t, size_t, nni_opt_type);
 extern int nni_copyin_ptr(void **, const void *, size_t, nni_opt_type);
 extern int nni_copyin_u64(uint64_t *, const void *, size_t, nni_opt_type);
+extern int nni_copyin_sockaddr(
+    nng_sockaddr *, const void *, size_t, nni_opt_type);
 
 // nni_copyout_xxx copies out a type of the named value.  It assumes that
 // the type is aligned and the size correct, unless NNI_TYPE_OPAQUE is passed.