Add a "fork" of musl as //fusl.

fusl/include/netpacket/packet.h

+#ifndef _NETPACKET_PACKET_H
+#define _NETPACKET_PACKET_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct sockaddr_ll {
+        unsigned short sll_family, sll_protocol;
+        int sll_ifindex;
+        unsigned short sll_hatype;
+        unsigned char sll_pkttype, sll_halen;
+        unsigned char sll_addr[8];
+};
+
+struct packet_mreq {
+        int mr_ifindex;
+        unsigned short int mr_type,  mr_alen;
+        unsigned char mr_address[8];
+};
+
+#define PACKET_HOST             0
+#define PACKET_BROADCAST        1
+#define PACKET_MULTICAST        2
+#define PACKET_OTHERHOST        3
+#define PACKET_OUTGOING         4
+#define PACKET_LOOPBACK         5
+#define PACKET_FASTROUTE        6
+
+#define PACKET_ADD_MEMBERSHIP           1
+#define PACKET_DROP_MEMBERSHIP          2
+#define PACKET_RECV_OUTPUT              3
+#define PACKET_RX_RING                  5
+#define PACKET_STATISTICS               6
+
+#define PACKET_MR_MULTICAST     0
+#define PACKET_MR_PROMISC       1
+#define PACKET_MR_ALLMULTI      2
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif