net: Add GARP applicant-only participant
Add an implementation of the GARP (Generic Attribute Registration Protocol)
applicant-only participant. This will be used by the following patch to
add GVRP support to the VLAN code.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/garp.h b/include/net/garp.h
new file mode 100644
index 0000000..73c7723
--- /dev/null
+++ b/include/net/garp.h
@@ -0,0 +1,127 @@
+#ifndef _NET_GARP_H
+#define _NET_GARP_H
+
+#include <net/stp.h>
+
+#define GARP_PROTOCOL_ID 0x1
+#define GARP_END_MARK 0x0
+
+struct garp_pdu_hdr {
+ __be16 protocol;
+};
+
+struct garp_msg_hdr {
+ u8 attrtype;
+};
+
+enum garp_attr_event {
+ GARP_LEAVE_ALL,
+ GARP_JOIN_EMPTY,
+ GARP_JOIN_IN,
+ GARP_LEAVE_EMPTY,
+ GARP_LEAVE_IN,
+ GARP_EMPTY,
+};
+
+struct garp_attr_hdr {
+ u8 len;
+ u8 event;
+ u8 data[];
+};
+
+struct garp_skb_cb {
+ u8 cur_type;
+};
+
+static inline struct garp_skb_cb *garp_cb(struct sk_buff *skb)
+{
+ BUILD_BUG_ON(sizeof(struct garp_skb_cb) >
+ FIELD_SIZEOF(struct sk_buff, cb));
+ return (struct garp_skb_cb *)skb->cb;
+}
+
+enum garp_applicant_state {
+ GARP_APPLICANT_INVALID,
+ GARP_APPLICANT_VA,
+ GARP_APPLICANT_AA,
+ GARP_APPLICANT_QA,
+ GARP_APPLICANT_LA,
+ GARP_APPLICANT_VP,
+ GARP_APPLICANT_AP,
+ GARP_APPLICANT_QP,
+ GARP_APPLICANT_VO,
+ GARP_APPLICANT_AO,
+ GARP_APPLICANT_QO,
+ __GARP_APPLICANT_MAX
+};
+#define GARP_APPLICANT_MAX (__GARP_APPLICANT_MAX - 1)
+
+enum garp_event {
+ GARP_EVENT_REQ_JOIN,
+ GARP_EVENT_REQ_LEAVE,
+ GARP_EVENT_R_JOIN_IN,
+ GARP_EVENT_R_JOIN_EMPTY,
+ GARP_EVENT_R_EMPTY,
+ GARP_EVENT_R_LEAVE_IN,
+ GARP_EVENT_R_LEAVE_EMPTY,
+ GARP_EVENT_TRANSMIT_PDU,
+ __GARP_EVENT_MAX
+};
+#define GARP_EVENT_MAX (__GARP_EVENT_MAX - 1)
+
+enum garp_action {
+ GARP_ACTION_NONE,
+ GARP_ACTION_S_JOIN_IN,
+ GARP_ACTION_S_LEAVE_EMPTY,
+};
+
+struct garp_attr {
+ struct rb_node node;
+ enum garp_applicant_state state;
+ u8 type;
+ u8 dlen;
+ unsigned char data[];
+};
+
+enum garp_applications {
+ __GARP_APPLICATION_MAX
+};
+#define GARP_APPLICATION_MAX (__GARP_APPLICATION_MAX - 1)
+
+struct garp_application {
+ enum garp_applications type;
+ unsigned int maxattr;
+ struct stp_proto proto;
+};
+
+struct garp_applicant {
+ struct garp_application *app;
+ struct net_device *dev;
+ struct timer_list join_timer;
+
+ spinlock_t lock;
+ struct sk_buff_head queue;
+ struct sk_buff *pdu;
+ struct rb_root gid;
+};
+
+struct garp_port {
+ struct garp_applicant *applicants[GARP_APPLICATION_MAX + 1];
+};
+
+extern int garp_register_application(struct garp_application *app);
+extern void garp_unregister_application(struct garp_application *app);
+
+extern int garp_init_applicant(struct net_device *dev,
+ struct garp_application *app);
+extern void garp_uninit_applicant(struct net_device *dev,
+ struct garp_application *app);
+
+extern int garp_request_join(const struct net_device *dev,
+ const struct garp_application *app,
+ const void *data, u8 len, u8 type);
+extern void garp_request_leave(const struct net_device *dev,
+ const struct garp_application *app,
+ const void *data, u8 len, u8 type);
+
+#endif /* _NET_GARP_H */