* @(#)ndrv.h 1.1 (MacOSX) 6/10/43
* Justin Walker - 970604
*/
+#include <net/dlil.h>
#ifndef _NET_NDRV_H
#define _NET_NDRV_H
+#include <sys/appleapiopts.h>
+
struct sockaddr_ndrv
-{ unsigned char snd_len;
+{
+ unsigned char snd_len;
unsigned char snd_family;
unsigned char snd_name[IFNAMSIZ]; /* from if.h */
};
/*
- * The cb is plugged into the socket (so_pcb), and the ifnet structure
- * of BIND is plugged in here.
- * For now, it looks like a raw_cb up front...
+ * Support for user-mode protocol handlers
*/
-struct ndrv_cb
-{ struct ndrv_cb *nd_next; /* Doubly-linked list */
- struct ndrv_cb *nd_prev;
- struct socket *nd_socket; /* Back to the socket */
- unsigned int nd_signature; /* Just double-checking */
- struct sockaddr_ndrv *nd_faddr;
- struct sockaddr_ndrv *nd_laddr;
- struct sockproto nd_proto; /* proto family, protocol */
- int nd_descrcnt; /* # elements in nd_dlist */
- TAILQ_HEAD(dlist, dlil_demux_desc) nd_dlist; /* Descr. list */
- struct ifnet *nd_if;
-};
-#define sotondrvcb(so) ((struct ndrv_cb *)(so)->so_pcb)
-#define NDRV_SIGNATURE 0x4e445256 /* "NDRV" */
+#define NDRV_DEMUXTYPE_ETHERTYPE DLIL_DESC_ETYPE2
+#define NDRV_DEMUXTYPE_SAP DLIL_DESC_SAP
+#define NDRV_DEMUXTYPE_SNAP DLIL_DESC_SNAP
-/* Nominal allocated space for NDRV sockets */
-#define NDRVSNDQ 8192
-#define NDRVRCVQ 8192
+#define NDRVPROTO_NDRV 0
/*
- * Support for user-mode protocol handlers
+ * Struct: ndrv_demux_desc
+ * Purpose:
+ * To uniquely identify a packet based on its low-level framing information.
+ *
+ * Fields:
+ * type : type of protocol in data field, must be understood by
+ * the interface family of the interface the socket is bound to
+ * length : length of protocol data in "data" field
+ * data : union of framing-specific data, in network byte order
+ * ether_type : ethernet type in network byte order, assuming
+ * ethernet type II framing
+ * sap : first 3 bytes of sap header, network byte order
+ * snap : first 5 bytes of snap header, network byte order
+ * other : up to 28 bytes of protocol data for different protocol type
+ *
+ * Examples:
+ * 1) 802.1x uses ether_type 0x888e, so the descriptor would be set as:
+ * struct ndrv_demux_desc desc;
+ * desc.type = NDRV_DEMUXTYPE_ETHERTYPE
+ * desc.length = sizeof(unsigned short);
+ * desc.ether_type = htons(0x888e);
+ * 2) AppleTalk uses SNAP 0x080007809B
+ * struct ndrv_demux_desc desc;
+ * desc.type = NDRV_DEMUXTYPE_SNAP;
+ * desc.length = 5;
+ * desc.data.snap[0] = 08;
+ * desc.data.snap[1] = 00;
+ * desc.data.snap[2] = 07;
+ * desc.data.snap[3] = 80;
+ * desc.data.snap[4] = 9B;
*/
+struct ndrv_demux_desc
+{
+ u_int16_t type;
+ u_int16_t length;
+ union
+ {
+ u_int16_t ether_type;
+ u_int8_t sap[3];
+ u_int8_t snap[5];
+ u_int8_t other[28];
+ } data;
+};
+
+#define NDRV_PROTOCOL_DESC_VERS 1
-/* Arg to socket options */
-struct ndrv_descr
-{ unsigned int nd_len; /* Length of descriptor buffer, in bytes */
- unsigned char *nd_buf; /* Descriptor buffer */
+/*
+ * Struct: ndrv_protocol_desc
+ * Purpose:
+ * Used to "bind" an NDRV socket so that packets that match
+ * given protocol demux descriptions can be received:
+ * Field:
+ * version : must be NDRV_PROTOCOL_DESC_VERS
+ * protocol_family : unique identifier for this protocol
+ * demux_count : number of demux_list descriptors in demux_list
+ * demux_list : pointer to array of demux descriptors
+ */
+struct ndrv_protocol_desc
+{
+ u_int32_t version;
+ u_int32_t protocol_family;
+ u_int32_t demux_count;
+ struct ndrv_demux_desc* demux_list;
};
-#define NDRV_DMXSPEC 0x01 /* Get/Set (Add) a list of protocol specs */
-#define NDRV_DELDMXSPEC 0x02 /* Delete a list of protocol specs */
-#define NDRV_DMXSPECCNT 0x03 /* Return number of active protocol specs */
+#define SOL_NDRVPROTO NDRVPROTO_NDRV /* Use this socket level */
+/* NDRV_DMXSPEC 0x01 Obsolete */
+#define NDRV_DELDMXSPEC 0x02 /* Delete the registered protocol */
+/* NDRV_DMXSPECCNT 0x03 Obsolete */
+#define NDRV_SETDMXSPEC 0x04 /* Set the protocol spec */
+#define NDRV_ADDMULTICAST 0x05 /* Add a physical multicast address */
+#define NDRV_DELMULTICAST 0x06 /* Delete a phyiscal multicast */
+
+/*
+ * SOL_NDRVPROTO - use this for the socket level when calling setsocketopt
+ * NDRV_DELDMXSPEC - removes the registered protocol and all related demuxes
+ * NDRV_SETDMXSPEC - set the protocol to receive, use struct ndrv_protocol_desc
+ * as the parameter.
+ * NDRV_ADDMULTICAST - Enable reception of a phyiscal multicast address, use
+ * a sockaddr of the appropriate type for the media in use.
+ * NDRV_DELMULTICAST - Disable reception of a phyiscal multicast address, use
+ * a sockaddr of the appropriate type for the media in use.
+ *
+ * When adding multicasts, the multicasts are ref counted. If the multicast is
+ * already registered in the kernel, the count will be bumped. When deleting
+ * the multicast, the count is decremented. If the count reaches zero the
+ * multicast is removed. If your process is killed, PF_NDRV will unregister
+ * the mulitcasts you've added. You can only delete multicasts you've added
+ * on the same socket.
+ *
+ * If the interface goes away while your socket is open, your protocol is
+ * immediately detached and sending/receiving is disabled on the socket.
+ * If you need a chance to do something, please file a bug and we can give
+ * you a second or two.
+ */
-#if KERNEL
-extern struct ndrv_cb ndrvl; /* Head of controlblock list */
+#ifdef KERNEL
+#ifdef __APPLE_API_UNSTABLE
+/* Additional Kernel APIs */
+struct ifnet* ndrv_get_ifp(caddr_t ndrv_pcb);
+#endif /* __APPLE_API_UNSTABLE */
#endif
+
#endif /* _NET_NDRV_H */
projects / apple / xnu.git / blobdiff