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| author | Eugen Wissner <belka@caraus.de> | 2018-09-02 09:40:43 +0200 |
|---|---|---|
| committer | Eugen Wissner <belka@caraus.de> | 2018-09-02 10:00:52 +0200 |
| commit | 09f434f631fa33c3d7d48e7d8cbdc5407ad6116b (patch) | |
| tree | fb0ab7823573b0e87f91fa24dc30a6425d12d536 | |
| parent | 1f615301e5af2bcda525327f0dfd4381c24c0e45 (diff) | |
| download | tanya-09f434f631fa33c3d7d48e7d8cbdc5407ad6116b.tar.gz | |
net.iface: Add indexToName
| -rw-r--r-- | source/tanya/net/iface.d | 89 |
1 files changed, 88 insertions, 1 deletions
diff --git a/source/tanya/net/iface.d b/source/tanya/net/iface.d index abb5c42..1feaa2a 100644 --- a/source/tanya/net/iface.d +++ b/source/tanya/net/iface.d @@ -14,7 +14,9 @@ */
module tanya.net.iface;
+import tanya.algorithm.comparison;
import tanya.algorithm.mutation;
+import tanya.container.string;
import tanya.meta.trait;
import tanya.meta.transform;
import tanya.range;
@@ -58,7 +60,6 @@ if (isInputRange!R && is(Unqual!(ElementType!R) == char) && hasLength!R) return 0;
}
ifreq ifreq_ = void;
- ifreq_.ifr_ifindex = 8;
copy(name, ifreq_.ifr_name[]);
ifreq_.ifr_name[name.length] = '\0';
@@ -139,3 +140,89 @@ if (isInputRange!R && is(Unqual!(ElementType!R) == char) && hasLength!R) }
assert(nameToIndex("ecafretni") == 0);
}
+
+/**
+ * Converts the index of a network interface to its name.
+ *
+ * If an interface with the $(D_PARAM index) cannot be found or another
+ * error occurres, returns an empty $(D_PSYMBOL String).
+ *
+ * Params:
+ * index = Interface index.
+ *
+ * Returns: Returns interface name or an empty $(D_PSYMBOL String).
+ */
+String indexToName(uint index) @nogc nothrow @trusted
+{
+ import tanya.memory.op : findNullTerminated;
+
+ version (TanyaNative)
+ {
+ ifreq ifreq_ = void;
+ ifreq_.ifr_ifindex = index;
+
+ auto socket = syscall(AF_INET,
+ SOCK_DGRAM | SOCK_CLOEXEC,
+ 0,
+ NR_socket);
+ if (socket <= 0)
+ {
+ return String();
+ }
+ scope (exit)
+ {
+ syscall(socket, NR_close);
+ }
+ if (syscall(socket,
+ SIOCGIFNAME,
+ cast(ptrdiff_t) &ifreq_,
+ NR_ioctl) == 0)
+ {
+ return String(findNullTerminated(ifreq_.ifr_name));
+ }
+ return String();
+ }
+ else version (Windows)
+ {
+ NET_LUID luid;
+ if (ConvertInterfaceIndexToLuid(index, &luid) != 0)
+ {
+ return String();
+ }
+
+ char[IF_MAX_STRING_SIZE + 1] buffer;
+ if (ConvertInterfaceLuidToNameA(&luid,
+ buffer.ptr,
+ IF_MAX_STRING_SIZE + 1) != 0)
+ {
+ return String();
+ }
+ return String(findNullTerminated(buffer));
+ }
+ else version (Posix)
+ {
+ char[IF_NAMESIZE] buffer;
+ if (if_indextoname(index, buffer.ptr) is null)
+ {
+ return String();
+ }
+ return String(findNullTerminated(buffer));
+ }
+}
+
+@nogc nothrow @safe unittest
+{
+ version (linux)
+ {
+ assert(equal(indexToName(1)[], "lo"));
+ }
+ else version (Windows)
+ {
+ assert(equal(indexToName(1)[], "loopback_0"));
+ }
+ else
+ {
+ assert(equal(indexToName(1)[], "lo0"));
+ }
+ assert(indexToName(uint.max).empty);
+}
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