*/
#include <linux/if.h>
+#include <linux/if_ether.h>
#include <linux/list.h>
#include <linux/spinlock.h>
extern struct list_head llc_sap_list;
extern rwlock_t llc_sap_list_lock;
+extern unsigned char llc_station_mac_sa[ETH_ALEN];
extern int llc_rcv(struct sk_buff *skb, struct net_device *dev,
struct packet_type *pt);
+extern int llc_mac_hdr_init(struct sk_buff *skb,
+ unsigned char *sa, unsigned char *da);
+
extern void llc_add_pack(int type, void (*handler)(struct llc_sap *sap,
struct sk_buff *skb));
extern void llc_remove_pack(int type);
+++ /dev/null
-#ifndef LLC_ACTN_H
-#define LLC_ACTN_H
-/*
- * Copyright (c) 1997 by Procom Technology,Inc.
- * 2001 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
- *
- * This program can be redistributed or modified under the terms of the
- * GNU General Public License as published by the Free Software Foundation.
- * This program is distributed without any warranty or implied warranty
- * of merchantability or fitness for a particular purpose.
- *
- * See the GNU General Public License for more details.
- */
-/* Station component state transition actions */
-#define LLC_STATION_AC_START_ACK_TMR 1
-#define LLC_STATION_AC_SET_RETRY_CNT_0 2
-#define LLC_STATION_AC_INC_RETRY_CNT_BY_1 3
-#define LLC_STATION_AC_SET_XID_R_CNT_0 4
-#define LLC_STATION_AC_INC_XID_R_CNT_BY_1 5
-#define LLC_STATION_AC_SEND_NULL_DSAP_XID_C 6
-#define LLC_STATION_AC_SEND_XID_R 7
-#define LLC_STATION_AC_SEND_TEST_R 8
-#define LLC_STATION_AC_REPORT_STATUS 9
-
-/* All station state event action functions look like this */
-typedef int (*llc_station_action_t)(struct llc_station *station,
- struct sk_buff *skb);
-extern int llc_station_ac_start_ack_timer(struct llc_station *station,
- struct sk_buff *skb);
-extern int llc_station_ac_set_retry_cnt_0(struct llc_station *station,
- struct sk_buff *skb);
-extern int llc_station_ac_inc_retry_cnt_by_1(struct llc_station *station,
- struct sk_buff *skb);
-extern int llc_station_ac_set_xid_r_cnt_0(struct llc_station *station,
- struct sk_buff *skb);
-extern int llc_station_ac_inc_xid_r_cnt_by_1(struct llc_station *station,
- struct sk_buff *skb);
-extern int llc_station_ac_send_null_dsap_xid_c(struct llc_station *station,
- struct sk_buff *skb);
-extern int llc_station_ac_send_xid_r(struct llc_station *station,
- struct sk_buff *skb);
-extern int llc_station_ac_send_test_r(struct llc_station *station,
- struct sk_buff *skb);
-extern int llc_station_ac_report_status(struct llc_station *station,
- struct sk_buff *skb);
-extern int llc_station_ac_report_status(struct llc_station *station,
- struct sk_buff *skb);
-extern void llc_station_ack_tmr_cb(unsigned long timeout_data);
-#endif /* LLC_ACTN_H */
+++ /dev/null
-#ifndef LLC_EVNT_H
-#define LLC_EVNT_H
-/*
- * Copyright (c) 1997 by Procom Technology,Inc.
- * 2001 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
- *
- * This program can be redistributed or modified under the terms of the
- * GNU General Public License as published by the Free Software Foundation.
- * This program is distributed without any warranty or implied warranty
- * of merchantability or fitness for a particular purpose.
- *
- * See the GNU General Public License for more details.
- */
-/* Station component state transition events */
-/* Types of events (possible values in 'ev->type') */
-#define LLC_STATION_EV_TYPE_SIMPLE 1
-#define LLC_STATION_EV_TYPE_CONDITION 2
-#define LLC_STATION_EV_TYPE_PRIM 3
-#define LLC_STATION_EV_TYPE_PDU 4 /* command/response PDU */
-#define LLC_STATION_EV_TYPE_ACK_TMR 5
-#define LLC_STATION_EV_TYPE_RPT_STATUS 6
-
-/* Events */
-#define LLC_STATION_EV_ENABLE_WITH_DUP_ADDR_CHECK 1
-#define LLC_STATION_EV_ENABLE_WITHOUT_DUP_ADDR_CHECK 2
-#define LLC_STATION_EV_ACK_TMR_EXP_LT_RETRY_CNT_MAX_RETRY 3
-#define LLC_STATION_EV_ACK_TMR_EXP_EQ_RETRY_CNT_MAX_RETRY 4
-#define LLC_STATION_EV_RX_NULL_DSAP_XID_C 5
-#define LLC_STATION_EV_RX_NULL_DSAP_0_XID_R_XID_R_CNT_EQ 6
-#define LLC_STATION_EV_RX_NULL_DSAP_1_XID_R_XID_R_CNT_EQ 7
-#define LLC_STATION_EV_RX_NULL_DSAP_TEST_C 8
-#define LLC_STATION_EV_DISABLE_REQ 9
-
-struct llc_station_state_ev {
- u8 type;
- u8 prim;
- u8 prim_type;
- u8 reason;
- struct list_head node; /* node in station->ev_q.list */
-};
-
-static __inline__ struct llc_station_state_ev *
- llc_station_ev(struct sk_buff *skb)
-{
- return (struct llc_station_state_ev *)skb->cb;
-}
-
-struct llc_station;
-
-typedef int (*llc_station_ev_t)(struct llc_station *station,
- struct sk_buff *skb);
-
-extern int llc_stat_ev_enable_with_dup_addr_check(struct llc_station *station,
- struct sk_buff *skb);
-extern int llc_stat_ev_enable_without_dup_addr_check(struct llc_station *station,
- struct sk_buff *skb);
-extern int llc_stat_ev_ack_tmr_exp_lt_retry_cnt_max_retry(struct llc_station *
- station,
- struct sk_buff *skb);
-extern int llc_stat_ev_ack_tmr_exp_eq_retry_cnt_max_retry(struct llc_station *station,
- struct sk_buff *skb);
-extern int llc_stat_ev_rx_null_dsap_xid_c(struct llc_station *station,
- struct sk_buff *skb);
-extern int llc_stat_ev_rx_null_dsap_0_xid_r_xid_r_cnt_eq(struct llc_station *station,
- struct sk_buff *skb);
-extern int llc_stat_ev_rx_null_dsap_1_xid_r_xid_r_cnt_eq(struct llc_station *station,
- struct sk_buff *skb);
-extern int llc_stat_ev_rx_null_dsap_test_c(struct llc_station *station,
- struct sk_buff *skb);
-extern int llc_stat_ev_disable_req(struct llc_station *station,
- struct sk_buff *skb);
-#endif /* LLC_EVNT_H */
+++ /dev/null
-#ifndef LLC_STAT_H
-#define LLC_STAT_H
-/*
- * Copyright (c) 1997 by Procom Technology,Inc.
- * 2001 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
- *
- * This program can be redistributed or modified under the terms of the
- * GNU General Public License as published by the Free Software Foundation.
- * This program is distributed without any warranty or implied warranty
- * of merchantability or fitness for a particular purpose.
- *
- * See the GNU General Public License for more details.
- */
-/* Station component state table */
-/* Station component states */
-#define LLC_STATION_STATE_DOWN 1 /* initial state */
-#define LLC_STATION_STATE_DUP_ADDR_CHK 2
-#define LLC_STATION_STATE_UP 3
-
-#define LLC_NBR_STATION_STATES 3 /* size of state table */
-
-/* Station component state table structure */
-struct llc_station_state_trans {
- llc_station_ev_t ev;
- u8 next_state;
- llc_station_action_t *ev_actions;
-};
-
-struct llc_station_state {
- u8 curr_state;
- struct llc_station_state_trans **transitions;
-};
-
-extern struct llc_station_state llc_station_state_table[LLC_NBR_STATION_STATES];
-#endif /* LLC_STAT_H */
struct timer_list ack_timer;
u8 retry_count;
u8 maximum_retry;
- u8 mac_sa[6];
struct {
struct sk_buff_head list;
spinlock_t lock;
struct sk_buff_head mac_pdu_q;
};
-extern void llc_station_state_process(struct llc_station *station,
- struct sk_buff *skb);
-extern void llc_station_send_pdu(struct llc_station *station,
- struct sk_buff *skb);
extern int __init llc_station_init(void);
extern void __exit llc_station_exit(void);
#endif /* LLC_STATION_H */
obj-$(CONFIG_LLC2) += llc2.o
llc2-y := llc_if.o llc_c_ev.o llc_c_ac.o llc_conn.o llc_c_st.o llc_pdu.o \
- llc_sap.o llc_s_ac.o llc_s_ev.o llc_s_st.o af_llc.o llc_station.o \
- llc_actn.o llc_stat.o llc_evnt.o
+ llc_sap.o llc_s_ac.o llc_s_ev.o llc_s_st.o af_llc.o llc_station.o
llc2-$(CONFIG_PROC_FS) += llc_proc.o
+++ /dev/null
-/*
- * llc_actn.c - Implementation of actions of station component of LLC
- *
- * Description :
- * Functions in this module are implementation of station component actions.
- * Details of actions can be found in IEEE-802.2 standard document.
- * All functions have one station and one event as input argument. All of
- * them return 0 On success and 1 otherwise.
- *
- * Copyright (c) 1997 by Procom Technology, Inc.
- * 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
- *
- * This program can be redistributed or modified under the terms of the
- * GNU General Public License as published by the Free Software Foundation.
- * This program is distributed without any warranty or implied warranty
- * of merchantability or fitness for a particular purpose.
- *
- * See the GNU General Public License for more details.
- */
-#include <linux/netdevice.h>
-#include <net/llc_if.h>
-#include <net/llc_evnt.h>
-#include <net/llc_pdu.h>
-#include <net/llc_sap.h>
-#include <net/llc_station.h>
-#include "llc_output.h"
-
-int llc_station_ac_start_ack_timer(struct llc_station *station,
- struct sk_buff *skb)
-{
- mod_timer(&station->ack_timer, jiffies + LLC_ACK_TIME * HZ);
- return 0;
-}
-
-int llc_station_ac_set_retry_cnt_0(struct llc_station *station,
- struct sk_buff *skb)
-{
- station->retry_count = 0;
- return 0;
-}
-
-int llc_station_ac_inc_retry_cnt_by_1(struct llc_station *station,
- struct sk_buff *skb)
-{
- station->retry_count++;
- return 0;
-}
-
-int llc_station_ac_set_xid_r_cnt_0(struct llc_station *station,
- struct sk_buff *skb)
-{
- station->xid_r_count = 0;
- return 0;
-}
-
-int llc_station_ac_inc_xid_r_cnt_by_1(struct llc_station *station,
- struct sk_buff *skb)
-{
- station->xid_r_count++;
- return 0;
-}
-
-int llc_station_ac_send_null_dsap_xid_c(struct llc_station *station,
- struct sk_buff *skb)
-{
- int rc = 1;
- struct sk_buff *nskb = llc_alloc_frame();
-
- if (!nskb)
- goto out;
- llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, 0, 0, LLC_PDU_CMD);
- llc_pdu_init_as_xid_cmd(nskb, LLC_XID_NULL_CLASS_2, 127);
- rc = llc_mac_hdr_init(nskb, station->mac_sa, station->mac_sa);
- if (rc)
- goto free;
- llc_station_send_pdu(station, nskb);
-out:
- return rc;
-free:
- kfree_skb(skb);
- goto out;
-}
-
-int llc_station_ac_send_xid_r(struct llc_station *station,
- struct sk_buff *skb)
-{
- u8 mac_da[ETH_ALEN], dsap;
- int rc = 1;
- struct sk_buff* nskb = llc_alloc_frame();
-
- if (!nskb)
- goto out;
- rc = 0;
- nskb->dev = skb->dev;
- llc_pdu_decode_sa(skb, mac_da);
- llc_pdu_decode_ssap(skb, &dsap);
- llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, 0, dsap, LLC_PDU_RSP);
- llc_pdu_init_as_xid_rsp(nskb, LLC_XID_NULL_CLASS_2, 127);
- rc = llc_mac_hdr_init(nskb, station->mac_sa, mac_da);
- if (rc)
- goto free;
- llc_station_send_pdu(station, nskb);
-out:
- return rc;
-free:
- kfree_skb(skb);
- goto out;
-}
-
-int llc_station_ac_send_test_r(struct llc_station *station,
- struct sk_buff *skb)
-{
- u8 mac_da[ETH_ALEN], dsap;
- int rc = 1;
- struct sk_buff *nskb = llc_alloc_frame();
-
- if (!nskb)
- goto out;
- rc = 0;
- nskb->dev = skb->dev;
- llc_pdu_decode_sa(skb, mac_da);
- llc_pdu_decode_ssap(skb, &dsap);
- llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, 0, dsap, LLC_PDU_RSP);
- llc_pdu_init_as_test_rsp(nskb, skb);
- rc = llc_mac_hdr_init(nskb, station->mac_sa, mac_da);
- if (rc)
- goto free;
- llc_station_send_pdu(station, nskb);
-out:
- return rc;
-free:
- kfree_skb(skb);
- goto out;
-}
-
-int llc_station_ac_report_status(struct llc_station *station,
- struct sk_buff *skb)
-{
- return 0;
-}
-
-void llc_station_ack_tmr_cb(unsigned long timeout_data)
-{
- struct llc_station *station = (struct llc_station *)timeout_data;
- struct sk_buff *skb = alloc_skb(0, GFP_ATOMIC);
-
- if (skb) {
- struct llc_station_state_ev *ev = llc_station_ev(skb);
-
- ev->type = LLC_STATION_EV_TYPE_ACK_TMR;
- llc_station_state_process(station, skb);
- }
-}
module_init(llc_init);
module_exit(llc_exit);
+EXPORT_SYMBOL(llc_station_mac_sa);
EXPORT_SYMBOL(llc_sap_list);
EXPORT_SYMBOL(llc_sap_list_lock);
EXPORT_SYMBOL(llc_sap_find);
+++ /dev/null
-/*
- * llc_evnt.c - LLC station component event match functions
- * Description :
- * Functions in this module are implementation of station component events.
- * Details of events can be found in IEEE-802.2 standard document.
- * All functions have one station and one event as input argument. All of
- * them return 0 On success and 1 otherwise.
- *
- * Copyright (c) 1997 by Procom Technology, Inc.
- * 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
- *
- * This program can be redistributed or modified under the terms of the
- * GNU General Public License as published by the Free Software Foundation.
- * This program is distributed without any warranty or implied warranty
- * of merchantability or fitness for a particular purpose.
- *
- * See the GNU General Public License for more details.
- */
-
-#include <net/sock.h>
-#include <net/llc_if.h>
-#include <net/llc_evnt.h>
-#include <net/llc_pdu.h>
-#include <net/llc_station.h>
-
-int llc_stat_ev_enable_with_dup_addr_check(struct llc_station *station,
- struct sk_buff *skb)
-{
- struct llc_station_state_ev *ev = llc_station_ev(skb);
-
- return ev->type == LLC_STATION_EV_TYPE_SIMPLE &&
- ev->prim_type ==
- LLC_STATION_EV_ENABLE_WITH_DUP_ADDR_CHECK ? 0 : 1;
-}
-
-int llc_stat_ev_enable_without_dup_addr_check(struct llc_station *station,
- struct sk_buff *skb)
-{
- struct llc_station_state_ev *ev = llc_station_ev(skb);
-
- return ev->type == LLC_STATION_EV_TYPE_SIMPLE &&
- ev->prim_type ==
- LLC_STATION_EV_ENABLE_WITHOUT_DUP_ADDR_CHECK ? 0 : 1;
-}
-
-int llc_stat_ev_ack_tmr_exp_lt_retry_cnt_max_retry(struct llc_station *station,
- struct sk_buff *skb)
-{
- struct llc_station_state_ev *ev = llc_station_ev(skb);
-
- return ev->type == LLC_STATION_EV_TYPE_ACK_TMR &&
- station->retry_count < station->maximum_retry ? 0 : 1;
-}
-
-int llc_stat_ev_ack_tmr_exp_eq_retry_cnt_max_retry(struct llc_station *station,
- struct sk_buff *skb)
-{
- struct llc_station_state_ev *ev = llc_station_ev(skb);
-
- return ev->type == LLC_STATION_EV_TYPE_ACK_TMR &&
- station->retry_count == station->maximum_retry ? 0 : 1;
-}
-
-int llc_stat_ev_rx_null_dsap_xid_c(struct llc_station *station,
- struct sk_buff *skb)
-{
- struct llc_station_state_ev *ev = llc_station_ev(skb);
- struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
-
- return ev->type == LLC_STATION_EV_TYPE_PDU &&
- LLC_PDU_IS_CMD(pdu) && /* command PDU */
- LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */
- LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_XID &&
- !pdu->dsap ? 0 : 1; /* NULL DSAP value */
-}
-
-int llc_stat_ev_rx_null_dsap_0_xid_r_xid_r_cnt_eq(struct llc_station *station,
- struct sk_buff *skb)
-{
- struct llc_station_state_ev *ev = llc_station_ev(skb);
- struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
-
- return ev->type == LLC_STATION_EV_TYPE_PDU &&
- LLC_PDU_IS_RSP(pdu) && /* response PDU */
- LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */
- LLC_U_PDU_RSP(pdu) == LLC_1_PDU_CMD_XID &&
- !pdu->dsap && /* NULL DSAP value */
- !station->xid_r_count ? 0 : 1;
-}
-
-int llc_stat_ev_rx_null_dsap_1_xid_r_xid_r_cnt_eq(struct llc_station *station,
- struct sk_buff *skb)
-{
- struct llc_station_state_ev *ev = llc_station_ev(skb);
- struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
-
- return ev->type == LLC_STATION_EV_TYPE_PDU &&
- LLC_PDU_IS_RSP(pdu) && /* response PDU */
- LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */
- LLC_U_PDU_RSP(pdu) == LLC_1_PDU_CMD_XID &&
- !pdu->dsap && /* NULL DSAP value */
- station->xid_r_count == 1 ? 0 : 1;
-}
-
-int llc_stat_ev_rx_null_dsap_test_c(struct llc_station *station,
- struct sk_buff *skb)
-{
- struct llc_station_state_ev *ev = llc_station_ev(skb);
- struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
-
- return ev->type == LLC_STATION_EV_TYPE_PDU &&
- LLC_PDU_IS_CMD(pdu) && /* command PDU */
- LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */
- LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_TEST &&
- !pdu->dsap ? 0 : 1; /* NULL DSAP */
-}
-
-int llc_stat_ev_disable_req(struct llc_station *station, struct sk_buff *skb)
-{
- struct llc_station_state_ev *ev = llc_station_ev(skb);
-
- return ev->type == LLC_STATION_EV_TYPE_PRIM &&
- ev->prim == LLC_DISABLE_PRIM &&
- ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
-}
+++ /dev/null
-/*
- * llc_stat.c - Implementation of LLC station component state machine
- * transitions
- * Copyright (c) 1997 by Procom Technology, Inc.
- * 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
- *
- * This program can be redistributed or modified under the terms of the
- * GNU General Public License as published by the Free Software Foundation.
- * This program is distributed without any warranty or implied warranty
- * of merchantability or fitness for a particular purpose.
- *
- * See the GNU General Public License for more details.
- */
-#include <linux/types.h>
-#include <net/llc_if.h>
-#include <net/llc_sap.h>
-#include <net/llc_evnt.h>
-#include <net/llc_actn.h>
-#include <net/llc_stat.h>
-
-/* COMMON STATION STATE transitions */
-
-/* dummy last-transition indicator; common to all state transition groups
- * last entry for this state
- * all members are zeros, .bss zeroes it
- */
-static struct llc_station_state_trans llc_stat_state_trans_end;
-
-/* DOWN STATE transitions */
-
-/* state transition for LLC_STATION_EV_ENABLE_WITH_DUP_ADDR_CHECK event */
-static llc_station_action_t llc_stat_down_state_actions_1[] = {
- [0] = llc_station_ac_start_ack_timer,
- [1] = llc_station_ac_set_retry_cnt_0,
- [2] = llc_station_ac_set_xid_r_cnt_0,
- [3] = llc_station_ac_send_null_dsap_xid_c,
- [4] = NULL,
-};
-
-static struct llc_station_state_trans llc_stat_down_state_trans_1 = {
- .ev = llc_stat_ev_enable_with_dup_addr_check,
- .next_state = LLC_STATION_STATE_DUP_ADDR_CHK,
- .ev_actions = llc_stat_down_state_actions_1,
-};
-
-/* state transition for LLC_STATION_EV_ENABLE_WITHOUT_DUP_ADDR_CHECK event */
-static llc_station_action_t llc_stat_down_state_actions_2[] = {
- [0] = llc_station_ac_report_status, /* STATION UP */
- [1] = NULL,
-};
-
-static struct llc_station_state_trans llc_stat_down_state_trans_2 = {
- .ev = llc_stat_ev_enable_without_dup_addr_check,
- .next_state = LLC_STATION_STATE_UP,
- .ev_actions = llc_stat_down_state_actions_2,
-};
-
-/* array of pointers; one to each transition */
-static struct llc_station_state_trans *llc_stat_dwn_state_trans[] = {
- [0] = &llc_stat_down_state_trans_1,
- [1] = &llc_stat_down_state_trans_2,
- [2] = &llc_stat_state_trans_end,
-};
-
-/* UP STATE transitions */
-/* state transition for LLC_STATION_EV_DISABLE_REQ event */
-static llc_station_action_t llc_stat_up_state_actions_1[] = {
- [0] = llc_station_ac_report_status, /* STATION DOWN */
- [1] = NULL,
-};
-
-static struct llc_station_state_trans llc_stat_up_state_trans_1 = {
- .ev = llc_stat_ev_disable_req,
- .next_state = LLC_STATION_STATE_DOWN,
- .ev_actions = llc_stat_up_state_actions_1,
-};
-
-/* state transition for LLC_STATION_EV_RX_NULL_DSAP_XID_C event */
-static llc_station_action_t llc_stat_up_state_actions_2[] = {
- [0] = llc_station_ac_send_xid_r,
- [1] = NULL,
-};
-
-static struct llc_station_state_trans llc_stat_up_state_trans_2 = {
- .ev = llc_stat_ev_rx_null_dsap_xid_c,
- .next_state = LLC_STATION_STATE_UP,
- .ev_actions = llc_stat_up_state_actions_2,
-};
-
-/* state transition for LLC_STATION_EV_RX_NULL_DSAP_TEST_C event */
-static llc_station_action_t llc_stat_up_state_actions_3[] = {
- [0] = llc_station_ac_send_test_r,
- [1] = NULL,
-};
-
-static struct llc_station_state_trans llc_stat_up_state_trans_3 = {
- .ev = llc_stat_ev_rx_null_dsap_test_c,
- .next_state = LLC_STATION_STATE_UP,
- .ev_actions = llc_stat_up_state_actions_3,
-};
-
-/* array of pointers; one to each transition */
-static struct llc_station_state_trans *llc_stat_up_state_trans [] = {
- [0] = &llc_stat_up_state_trans_1,
- [1] = &llc_stat_up_state_trans_2,
- [2] = &llc_stat_up_state_trans_3,
- [3] = &llc_stat_state_trans_end,
-};
-
-/* DUP ADDR CHK STATE transitions */
-/* state transition for LLC_STATION_EV_RX_NULL_DSAP_0_XID_R_XID_R_CNT_EQ
- * event
- */
-static llc_station_action_t llc_stat_dupaddr_state_actions_1[] = {
- [0] = llc_station_ac_inc_xid_r_cnt_by_1,
- [1] = NULL,
-};
-
-static struct llc_station_state_trans llc_stat_dupaddr_state_trans_1 = {
- .ev = llc_stat_ev_rx_null_dsap_0_xid_r_xid_r_cnt_eq,
- .next_state = LLC_STATION_STATE_DUP_ADDR_CHK,
- .ev_actions = llc_stat_dupaddr_state_actions_1,
-};
-
-/* state transition for LLC_STATION_EV_RX_NULL_DSAP_1_XID_R_XID_R_CNT_EQ
- * event
- */
-static llc_station_action_t llc_stat_dupaddr_state_actions_2[] = {
- [0] = llc_station_ac_report_status, /* DUPLICATE ADDRESS FOUND */
- [1] = NULL,
-};
-
-static struct llc_station_state_trans llc_stat_dupaddr_state_trans_2 = {
- .ev = llc_stat_ev_rx_null_dsap_1_xid_r_xid_r_cnt_eq,
- .next_state = LLC_STATION_STATE_DOWN,
- .ev_actions = llc_stat_dupaddr_state_actions_2,
-};
-
-/* state transition for LLC_STATION_EV_RX_NULL_DSAP_XID_C event */
-static llc_station_action_t llc_stat_dupaddr_state_actions_3[] = {
- [0] = llc_station_ac_send_xid_r,
- [1] = NULL,
-};
-
-static struct llc_station_state_trans llc_stat_dupaddr_state_trans_3 = {
- .ev = llc_stat_ev_rx_null_dsap_xid_c,
- .next_state = LLC_STATION_STATE_DUP_ADDR_CHK,
- .ev_actions = llc_stat_dupaddr_state_actions_3,
-};
-
-/* state transition for LLC_STATION_EV_ACK_TMR_EXP_LT_RETRY_CNT_MAX_RETRY
- * event
- */
-static llc_station_action_t llc_stat_dupaddr_state_actions_4[] = {
- [0] = llc_station_ac_start_ack_timer,
- [1] = llc_station_ac_inc_retry_cnt_by_1,
- [2] = llc_station_ac_set_xid_r_cnt_0,
- [3] = llc_station_ac_send_null_dsap_xid_c,
- [4] = NULL,
-};
-
-static struct llc_station_state_trans llc_stat_dupaddr_state_trans_4 = {
- .ev = llc_stat_ev_ack_tmr_exp_lt_retry_cnt_max_retry,
- .next_state = LLC_STATION_STATE_DUP_ADDR_CHK,
- .ev_actions = llc_stat_dupaddr_state_actions_4,
-};
-
-/* state transition for LLC_STATION_EV_ACK_TMR_EXP_EQ_RETRY_CNT_MAX_RETRY
- * event
- */
-static llc_station_action_t llc_stat_dupaddr_state_actions_5[] = {
- [0] = llc_station_ac_report_status, /* STATION UP */
- [1] = NULL,
-};
-
-static struct llc_station_state_trans llc_stat_dupaddr_state_trans_5 = {
- .ev = llc_stat_ev_ack_tmr_exp_eq_retry_cnt_max_retry,
- .next_state = LLC_STATION_STATE_UP,
- .ev_actions = llc_stat_dupaddr_state_actions_5,
-};
-
-/* state transition for LLC_STATION_EV_DISABLE_REQ event */
-static llc_station_action_t llc_stat_dupaddr_state_actions_6[] = {
- [0] = llc_station_ac_report_status, /* STATION DOWN */
- [1] = NULL,
-};
-
-static struct llc_station_state_trans llc_stat_dupaddr_state_trans_6 = {
- .ev = llc_stat_ev_disable_req,
- .next_state = LLC_STATION_STATE_DOWN,
- .ev_actions = llc_stat_dupaddr_state_actions_6,
-};
-
-/* array of pointers; one to each transition */
-static struct llc_station_state_trans *llc_stat_dupaddr_state_trans[] = {
- [0] = &llc_stat_dupaddr_state_trans_6, /* Request */
- [1] = &llc_stat_dupaddr_state_trans_4, /* Timer */
- [2] = &llc_stat_dupaddr_state_trans_5,
- [3] = &llc_stat_dupaddr_state_trans_1, /* Receive frame */
- [4] = &llc_stat_dupaddr_state_trans_2,
- [5] = &llc_stat_dupaddr_state_trans_3,
- [6] = &llc_stat_state_trans_end,
-};
-
-struct llc_station_state llc_station_state_table[LLC_NBR_STATION_STATES] = {
- [LLC_STATION_STATE_DOWN - 1] = {
- .curr_state = LLC_STATION_STATE_DOWN,
- .transitions = llc_stat_dwn_state_trans,
- },
- [LLC_STATION_STATE_DUP_ADDR_CHK - 1] = {
- .curr_state = LLC_STATION_STATE_DUP_ADDR_CHK,
- .transitions = llc_stat_dupaddr_state_trans,
- },
- [LLC_STATION_STATE_UP - 1] = {
- .curr_state = LLC_STATION_STATE_UP,
- .transitions = llc_stat_up_state_trans,
- },
-};
#include <net/llc_sap.h>
#include <net/llc_conn.h>
#include <net/llc_station.h>
-#include <net/llc_evnt.h>
-#include <net/llc_actn.h>
-#include <net/llc_stat.h>
#include <net/llc_c_ac.h>
#include <net/llc_s_ac.h>
#include <net/llc_c_ev.h>
#include <net/llc_c_st.h>
#include <net/llc_s_ev.h>
#include <net/llc_s_st.h>
-#include <net/llc_proc.h>
+#include <net/llc_pdu.h>
+
+/* Types of events (possible values in 'ev->type') */
+#define LLC_STATION_EV_TYPE_SIMPLE 1
+#define LLC_STATION_EV_TYPE_CONDITION 2
+#define LLC_STATION_EV_TYPE_PRIM 3
+#define LLC_STATION_EV_TYPE_PDU 4 /* command/response PDU */
+#define LLC_STATION_EV_TYPE_ACK_TMR 5
+#define LLC_STATION_EV_TYPE_RPT_STATUS 6
+
+/* Events */
+#define LLC_STATION_EV_ENABLE_WITH_DUP_ADDR_CHECK 1
+#define LLC_STATION_EV_ENABLE_WITHOUT_DUP_ADDR_CHECK 2
+#define LLC_STATION_EV_ACK_TMR_EXP_LT_RETRY_CNT_MAX_RETRY 3
+#define LLC_STATION_EV_ACK_TMR_EXP_EQ_RETRY_CNT_MAX_RETRY 4
+#define LLC_STATION_EV_RX_NULL_DSAP_XID_C 5
+#define LLC_STATION_EV_RX_NULL_DSAP_0_XID_R_XID_R_CNT_EQ 6
+#define LLC_STATION_EV_RX_NULL_DSAP_1_XID_R_XID_R_CNT_EQ 7
+#define LLC_STATION_EV_RX_NULL_DSAP_TEST_C 8
+#define LLC_STATION_EV_DISABLE_REQ 9
+
+struct llc_station_state_ev {
+ u8 type;
+ u8 prim;
+ u8 prim_type;
+ u8 reason;
+ struct list_head node; /* node in station->ev_q.list */
+};
+
+static __inline__ struct llc_station_state_ev *
+ llc_station_ev(struct sk_buff *skb)
+{
+ return (struct llc_station_state_ev *)skb->cb;
+}
+
+typedef int (*llc_station_ev_t)(struct sk_buff *skb);
+
+#define LLC_STATION_STATE_DOWN 1 /* initial state */
+#define LLC_STATION_STATE_DUP_ADDR_CHK 2
+#define LLC_STATION_STATE_UP 3
+
+#define LLC_NBR_STATION_STATES 3 /* size of state table */
+
+typedef int (*llc_station_action_t)(struct sk_buff *skb);
+
+/* Station component state table structure */
+struct llc_station_state_trans {
+ llc_station_ev_t ev;
+ u8 next_state;
+ llc_station_action_t *ev_actions;
+};
+
+struct llc_station_state {
+ u8 curr_state;
+ struct llc_station_state_trans **transitions;
+};
static struct llc_station llc_main_station;
+static int llc_stat_ev_enable_with_dup_addr_check(struct sk_buff *skb)
+{
+ struct llc_station_state_ev *ev = llc_station_ev(skb);
+
+ return ev->type == LLC_STATION_EV_TYPE_SIMPLE &&
+ ev->prim_type ==
+ LLC_STATION_EV_ENABLE_WITH_DUP_ADDR_CHECK ? 0 : 1;
+}
+
+static int llc_stat_ev_enable_without_dup_addr_check(struct sk_buff *skb)
+{
+ struct llc_station_state_ev *ev = llc_station_ev(skb);
+
+ return ev->type == LLC_STATION_EV_TYPE_SIMPLE &&
+ ev->prim_type ==
+ LLC_STATION_EV_ENABLE_WITHOUT_DUP_ADDR_CHECK ? 0 : 1;
+}
+
+static int llc_stat_ev_ack_tmr_exp_lt_retry_cnt_max_retry(struct sk_buff *skb)
+{
+ struct llc_station_state_ev *ev = llc_station_ev(skb);
+
+ return ev->type == LLC_STATION_EV_TYPE_ACK_TMR &&
+ llc_main_station.retry_count <
+ llc_main_station.maximum_retry ? 0 : 1;
+}
+
+static int llc_stat_ev_ack_tmr_exp_eq_retry_cnt_max_retry(struct sk_buff *skb)
+{
+ struct llc_station_state_ev *ev = llc_station_ev(skb);
+
+ return ev->type == LLC_STATION_EV_TYPE_ACK_TMR &&
+ llc_main_station.retry_count ==
+ llc_main_station.maximum_retry ? 0 : 1;
+}
+
+static int llc_stat_ev_rx_null_dsap_xid_c(struct sk_buff *skb)
+{
+ struct llc_station_state_ev *ev = llc_station_ev(skb);
+ struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
+
+ return ev->type == LLC_STATION_EV_TYPE_PDU &&
+ LLC_PDU_IS_CMD(pdu) && /* command PDU */
+ LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */
+ LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_XID &&
+ !pdu->dsap ? 0 : 1; /* NULL DSAP value */
+}
+
+static int llc_stat_ev_rx_null_dsap_0_xid_r_xid_r_cnt_eq(struct sk_buff *skb)
+{
+ struct llc_station_state_ev *ev = llc_station_ev(skb);
+ struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
+
+ return ev->type == LLC_STATION_EV_TYPE_PDU &&
+ LLC_PDU_IS_RSP(pdu) && /* response PDU */
+ LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */
+ LLC_U_PDU_RSP(pdu) == LLC_1_PDU_CMD_XID &&
+ !pdu->dsap && /* NULL DSAP value */
+ !llc_main_station.xid_r_count ? 0 : 1;
+}
+
+static int llc_stat_ev_rx_null_dsap_1_xid_r_xid_r_cnt_eq(struct sk_buff *skb)
+{
+ struct llc_station_state_ev *ev = llc_station_ev(skb);
+ struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
+
+ return ev->type == LLC_STATION_EV_TYPE_PDU &&
+ LLC_PDU_IS_RSP(pdu) && /* response PDU */
+ LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */
+ LLC_U_PDU_RSP(pdu) == LLC_1_PDU_CMD_XID &&
+ !pdu->dsap && /* NULL DSAP value */
+ llc_main_station.xid_r_count == 1 ? 0 : 1;
+}
+
+static int llc_stat_ev_rx_null_dsap_test_c(struct sk_buff *skb)
+{
+ struct llc_station_state_ev *ev = llc_station_ev(skb);
+ struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
+
+ return ev->type == LLC_STATION_EV_TYPE_PDU &&
+ LLC_PDU_IS_CMD(pdu) && /* command PDU */
+ LLC_PDU_TYPE_IS_U(pdu) && /* U type PDU */
+ LLC_U_PDU_CMD(pdu) == LLC_1_PDU_CMD_TEST &&
+ !pdu->dsap ? 0 : 1; /* NULL DSAP */
+}
+
+static int llc_stat_ev_disable_req(struct sk_buff *skb)
+{
+ struct llc_station_state_ev *ev = llc_station_ev(skb);
+
+ return ev->type == LLC_STATION_EV_TYPE_PRIM &&
+ ev->prim == LLC_DISABLE_PRIM &&
+ ev->prim_type == LLC_PRIM_TYPE_REQ ? 0 : 1;
+}
+
+/**
+ * llc_station_send_pdu - queues PDU to send
+ * @skb: Address of the PDU
+ *
+ * Queues a PDU to send to the MAC layer.
+ */
+static void llc_station_send_pdu(struct sk_buff *skb)
+{
+ skb_queue_tail(&llc_main_station.mac_pdu_q, skb);
+ while ((skb = skb_dequeue(&llc_main_station.mac_pdu_q)) != NULL)
+ if (dev_queue_xmit(skb))
+ break;
+}
+
+static int llc_station_ac_start_ack_timer(struct sk_buff *skb)
+{
+ mod_timer(&llc_main_station.ack_timer, jiffies + LLC_ACK_TIME * HZ);
+ return 0;
+}
+
+static int llc_station_ac_set_retry_cnt_0(struct sk_buff *skb)
+{
+ llc_main_station.retry_count = 0;
+ return 0;
+}
+
+static int llc_station_ac_inc_retry_cnt_by_1(struct sk_buff *skb)
+{
+ llc_main_station.retry_count++;
+ return 0;
+}
+
+static int llc_station_ac_set_xid_r_cnt_0(struct sk_buff *skb)
+{
+ llc_main_station.xid_r_count = 0;
+ return 0;
+}
+
+static int llc_station_ac_inc_xid_r_cnt_by_1(struct sk_buff *skb)
+{
+ llc_main_station.xid_r_count++;
+ return 0;
+}
+
+static int llc_station_ac_send_null_dsap_xid_c(struct sk_buff *skb)
+{
+ int rc = 1;
+ struct sk_buff *nskb = llc_alloc_frame();
+
+ if (!nskb)
+ goto out;
+ llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, 0, 0, LLC_PDU_CMD);
+ llc_pdu_init_as_xid_cmd(nskb, LLC_XID_NULL_CLASS_2, 127);
+ rc = llc_mac_hdr_init(nskb, llc_station_mac_sa, llc_station_mac_sa);
+ if (rc)
+ goto free;
+ llc_station_send_pdu(nskb);
+out:
+ return rc;
+free:
+ kfree_skb(skb);
+ goto out;
+}
+
+static int llc_station_ac_send_xid_r(struct sk_buff *skb)
+{
+ u8 mac_da[ETH_ALEN], dsap;
+ int rc = 1;
+ struct sk_buff* nskb = llc_alloc_frame();
+
+ if (!nskb)
+ goto out;
+ rc = 0;
+ nskb->dev = skb->dev;
+ llc_pdu_decode_sa(skb, mac_da);
+ llc_pdu_decode_ssap(skb, &dsap);
+ llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, 0, dsap, LLC_PDU_RSP);
+ llc_pdu_init_as_xid_rsp(nskb, LLC_XID_NULL_CLASS_2, 127);
+ rc = llc_mac_hdr_init(nskb, llc_station_mac_sa, mac_da);
+ if (rc)
+ goto free;
+ llc_station_send_pdu(nskb);
+out:
+ return rc;
+free:
+ kfree_skb(skb);
+ goto out;
+}
+
+static int llc_station_ac_send_test_r(struct sk_buff *skb)
+{
+ u8 mac_da[ETH_ALEN], dsap;
+ int rc = 1;
+ struct sk_buff *nskb = llc_alloc_frame();
+
+ if (!nskb)
+ goto out;
+ rc = 0;
+ nskb->dev = skb->dev;
+ llc_pdu_decode_sa(skb, mac_da);
+ llc_pdu_decode_ssap(skb, &dsap);
+ llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, 0, dsap, LLC_PDU_RSP);
+ llc_pdu_init_as_test_rsp(nskb, skb);
+ rc = llc_mac_hdr_init(nskb, llc_station_mac_sa, mac_da);
+ if (rc)
+ goto free;
+ llc_station_send_pdu(nskb);
+out:
+ return rc;
+free:
+ kfree_skb(skb);
+ goto out;
+}
+
+static int llc_station_ac_report_status(struct sk_buff *skb)
+{
+ return 0;
+}
+
+/* COMMON STATION STATE transitions */
+
+/* dummy last-transition indicator; common to all state transition groups
+ * last entry for this state
+ * all members are zeros, .bss zeroes it
+ */
+static struct llc_station_state_trans llc_stat_state_trans_end;
+
+/* DOWN STATE transitions */
+
+/* state transition for LLC_STATION_EV_ENABLE_WITH_DUP_ADDR_CHECK event */
+static llc_station_action_t llc_stat_down_state_actions_1[] = {
+ [0] = llc_station_ac_start_ack_timer,
+ [1] = llc_station_ac_set_retry_cnt_0,
+ [2] = llc_station_ac_set_xid_r_cnt_0,
+ [3] = llc_station_ac_send_null_dsap_xid_c,
+ [4] = NULL,
+};
+
+static struct llc_station_state_trans llc_stat_down_state_trans_1 = {
+ .ev = llc_stat_ev_enable_with_dup_addr_check,
+ .next_state = LLC_STATION_STATE_DUP_ADDR_CHK,
+ .ev_actions = llc_stat_down_state_actions_1,
+};
+
+/* state transition for LLC_STATION_EV_ENABLE_WITHOUT_DUP_ADDR_CHECK event */
+static llc_station_action_t llc_stat_down_state_actions_2[] = {
+ [0] = llc_station_ac_report_status, /* STATION UP */
+ [1] = NULL,
+};
+
+static struct llc_station_state_trans llc_stat_down_state_trans_2 = {
+ .ev = llc_stat_ev_enable_without_dup_addr_check,
+ .next_state = LLC_STATION_STATE_UP,
+ .ev_actions = llc_stat_down_state_actions_2,
+};
+
+/* array of pointers; one to each transition */
+static struct llc_station_state_trans *llc_stat_dwn_state_trans[] = {
+ [0] = &llc_stat_down_state_trans_1,
+ [1] = &llc_stat_down_state_trans_2,
+ [2] = &llc_stat_state_trans_end,
+};
+
+/* UP STATE transitions */
+/* state transition for LLC_STATION_EV_DISABLE_REQ event */
+static llc_station_action_t llc_stat_up_state_actions_1[] = {
+ [0] = llc_station_ac_report_status, /* STATION DOWN */
+ [1] = NULL,
+};
+
+static struct llc_station_state_trans llc_stat_up_state_trans_1 = {
+ .ev = llc_stat_ev_disable_req,
+ .next_state = LLC_STATION_STATE_DOWN,
+ .ev_actions = llc_stat_up_state_actions_1,
+};
+
+/* state transition for LLC_STATION_EV_RX_NULL_DSAP_XID_C event */
+static llc_station_action_t llc_stat_up_state_actions_2[] = {
+ [0] = llc_station_ac_send_xid_r,
+ [1] = NULL,
+};
+
+static struct llc_station_state_trans llc_stat_up_state_trans_2 = {
+ .ev = llc_stat_ev_rx_null_dsap_xid_c,
+ .next_state = LLC_STATION_STATE_UP,
+ .ev_actions = llc_stat_up_state_actions_2,
+};
+
+/* state transition for LLC_STATION_EV_RX_NULL_DSAP_TEST_C event */
+static llc_station_action_t llc_stat_up_state_actions_3[] = {
+ [0] = llc_station_ac_send_test_r,
+ [1] = NULL,
+};
+
+static struct llc_station_state_trans llc_stat_up_state_trans_3 = {
+ .ev = llc_stat_ev_rx_null_dsap_test_c,
+ .next_state = LLC_STATION_STATE_UP,
+ .ev_actions = llc_stat_up_state_actions_3,
+};
+
+/* array of pointers; one to each transition */
+static struct llc_station_state_trans *llc_stat_up_state_trans [] = {
+ [0] = &llc_stat_up_state_trans_1,
+ [1] = &llc_stat_up_state_trans_2,
+ [2] = &llc_stat_up_state_trans_3,
+ [3] = &llc_stat_state_trans_end,
+};
+
+/* DUP ADDR CHK STATE transitions */
+/* state transition for LLC_STATION_EV_RX_NULL_DSAP_0_XID_R_XID_R_CNT_EQ
+ * event
+ */
+static llc_station_action_t llc_stat_dupaddr_state_actions_1[] = {
+ [0] = llc_station_ac_inc_xid_r_cnt_by_1,
+ [1] = NULL,
+};
+
+static struct llc_station_state_trans llc_stat_dupaddr_state_trans_1 = {
+ .ev = llc_stat_ev_rx_null_dsap_0_xid_r_xid_r_cnt_eq,
+ .next_state = LLC_STATION_STATE_DUP_ADDR_CHK,
+ .ev_actions = llc_stat_dupaddr_state_actions_1,
+};
+
+/* state transition for LLC_STATION_EV_RX_NULL_DSAP_1_XID_R_XID_R_CNT_EQ
+ * event
+ */
+static llc_station_action_t llc_stat_dupaddr_state_actions_2[] = {
+ [0] = llc_station_ac_report_status, /* DUPLICATE ADDRESS FOUND */
+ [1] = NULL,
+};
+
+static struct llc_station_state_trans llc_stat_dupaddr_state_trans_2 = {
+ .ev = llc_stat_ev_rx_null_dsap_1_xid_r_xid_r_cnt_eq,
+ .next_state = LLC_STATION_STATE_DOWN,
+ .ev_actions = llc_stat_dupaddr_state_actions_2,
+};
+
+/* state transition for LLC_STATION_EV_RX_NULL_DSAP_XID_C event */
+static llc_station_action_t llc_stat_dupaddr_state_actions_3[] = {
+ [0] = llc_station_ac_send_xid_r,
+ [1] = NULL,
+};
+
+static struct llc_station_state_trans llc_stat_dupaddr_state_trans_3 = {
+ .ev = llc_stat_ev_rx_null_dsap_xid_c,
+ .next_state = LLC_STATION_STATE_DUP_ADDR_CHK,
+ .ev_actions = llc_stat_dupaddr_state_actions_3,
+};
+
+/* state transition for LLC_STATION_EV_ACK_TMR_EXP_LT_RETRY_CNT_MAX_RETRY
+ * event
+ */
+static llc_station_action_t llc_stat_dupaddr_state_actions_4[] = {
+ [0] = llc_station_ac_start_ack_timer,
+ [1] = llc_station_ac_inc_retry_cnt_by_1,
+ [2] = llc_station_ac_set_xid_r_cnt_0,
+ [3] = llc_station_ac_send_null_dsap_xid_c,
+ [4] = NULL,
+};
+
+static struct llc_station_state_trans llc_stat_dupaddr_state_trans_4 = {
+ .ev = llc_stat_ev_ack_tmr_exp_lt_retry_cnt_max_retry,
+ .next_state = LLC_STATION_STATE_DUP_ADDR_CHK,
+ .ev_actions = llc_stat_dupaddr_state_actions_4,
+};
+
+/* state transition for LLC_STATION_EV_ACK_TMR_EXP_EQ_RETRY_CNT_MAX_RETRY
+ * event
+ */
+static llc_station_action_t llc_stat_dupaddr_state_actions_5[] = {
+ [0] = llc_station_ac_report_status, /* STATION UP */
+ [1] = NULL,
+};
+
+static struct llc_station_state_trans llc_stat_dupaddr_state_trans_5 = {
+ .ev = llc_stat_ev_ack_tmr_exp_eq_retry_cnt_max_retry,
+ .next_state = LLC_STATION_STATE_UP,
+ .ev_actions = llc_stat_dupaddr_state_actions_5,
+};
+
+/* state transition for LLC_STATION_EV_DISABLE_REQ event */
+static llc_station_action_t llc_stat_dupaddr_state_actions_6[] = {
+ [0] = llc_station_ac_report_status, /* STATION DOWN */
+ [1] = NULL,
+};
+
+static struct llc_station_state_trans llc_stat_dupaddr_state_trans_6 = {
+ .ev = llc_stat_ev_disable_req,
+ .next_state = LLC_STATION_STATE_DOWN,
+ .ev_actions = llc_stat_dupaddr_state_actions_6,
+};
+
+/* array of pointers; one to each transition */
+static struct llc_station_state_trans *llc_stat_dupaddr_state_trans[] = {
+ [0] = &llc_stat_dupaddr_state_trans_6, /* Request */
+ [1] = &llc_stat_dupaddr_state_trans_4, /* Timer */
+ [2] = &llc_stat_dupaddr_state_trans_5,
+ [3] = &llc_stat_dupaddr_state_trans_1, /* Receive frame */
+ [4] = &llc_stat_dupaddr_state_trans_2,
+ [5] = &llc_stat_dupaddr_state_trans_3,
+ [6] = &llc_stat_state_trans_end,
+};
+
+static struct llc_station_state
+ llc_station_state_table[LLC_NBR_STATION_STATES] = {
+ [LLC_STATION_STATE_DOWN - 1] = {
+ .curr_state = LLC_STATION_STATE_DOWN,
+ .transitions = llc_stat_dwn_state_trans,
+ },
+ [LLC_STATION_STATE_DUP_ADDR_CHK - 1] = {
+ .curr_state = LLC_STATION_STATE_DUP_ADDR_CHK,
+ .transitions = llc_stat_dupaddr_state_trans,
+ },
+ [LLC_STATION_STATE_UP - 1] = {
+ .curr_state = LLC_STATION_STATE_UP,
+ .transitions = llc_stat_up_state_trans,
+ },
+};
+
/**
* llc_exec_station_trans_actions - executes actions for transition
- * @station: Address of the station
* @trans: Address of the transition
* @skb: Address of the event that caused the transition
*
* Executes actions of a transition of the station state machine. Returns
* 0 if all actions complete successfully, nonzero otherwise.
*/
-static u16 llc_exec_station_trans_actions(struct llc_station *station,
- struct llc_station_state_trans *trans,
+static u16 llc_exec_station_trans_actions(struct llc_station_state_trans *trans,
struct sk_buff *skb)
{
u16 rc = 0;
llc_station_action_t *next_action = trans->ev_actions;
for (; next_action && *next_action; next_action++)
- if ((*next_action)(station, skb))
+ if ((*next_action)(skb))
rc = 1;
return rc;
}
/**
* llc_find_station_trans - finds transition for this event
- * @station: Address of the station
* @skb: Address of the event
*
* Search thru events of the current state of the station until list
* state. Returns the address of the transition if cound, %NULL otherwise.
*/
static struct llc_station_state_trans *
- llc_find_station_trans(struct llc_station *station,
- struct sk_buff *skb)
+ llc_find_station_trans(struct sk_buff *skb)
{
int i = 0;
struct llc_station_state_trans *rc = NULL;
struct llc_station_state_trans **next_trans;
struct llc_station_state *curr_state =
- &llc_station_state_table[station->state - 1];
+ &llc_station_state_table[llc_main_station.state - 1];
for (next_trans = curr_state->transitions; next_trans[i]->ev; i++)
- if (!next_trans[i]->ev(station, skb)) {
+ if (!next_trans[i]->ev(skb)) {
rc = next_trans[i];
break;
}
/**
* llc_station_free_ev - frees an event
- * @station: Address of the station
* @skb: Address of the event
*
* Frees an event.
*/
-static void llc_station_free_ev(struct llc_station *station,
- struct sk_buff *skb)
+static void llc_station_free_ev(struct sk_buff *skb)
{
struct llc_station_state_ev *ev = llc_station_ev(skb);
/**
* llc_station_next_state - processes event and goes to the next state
- * @station: Address of the station
* @skb: Address of the event
*
* Processes an event, executes any transitions related to that event and
* updates the state of the station.
*/
-static u16 llc_station_next_state(struct llc_station *station,
- struct sk_buff *skb)
+static u16 llc_station_next_state(struct sk_buff *skb)
{
u16 rc = 1;
struct llc_station_state_trans *trans;
- if (station->state > LLC_NBR_STATION_STATES)
+ if (llc_main_station.state > LLC_NBR_STATION_STATES)
goto out;
- trans = llc_find_station_trans(station, skb);
+ trans = llc_find_station_trans(skb);
if (trans) {
/* got the state to which we next transition; perform the
* actions associated with this transition before actually
* transitioning to the next state
*/
- rc = llc_exec_station_trans_actions(station, trans, skb);
+ rc = llc_exec_station_trans_actions(trans, skb);
if (!rc)
/* transition station to next state if all actions
* execute successfully; done; wait for next event
*/
- station->state = trans->next_state;
+ llc_main_station.state = trans->next_state;
} else
/* event not recognized in current state; re-queue it for
* processing again at a later time; return failure
*/
rc = 0;
out:
- llc_station_free_ev(station, skb);
+ llc_station_free_ev(skb);
return rc;
}
/**
* llc_station_service_events - service events in the queue
- * @station: Address of the station
*
* Get an event from the station event queue (if any); attempt to service
* the event; if event serviced, get the next event (if any) on the event
* attempt to service the next event; when serviced all events in queue,
* finished; if don't transition to different state, just service all
* events once; if transition to new state, service all events again.
- * Caller must hold station->ev_q.lock.
+ * Caller must hold llc_main_station.ev_q.lock.
*/
-static void llc_station_service_events(struct llc_station *station)
+static void llc_station_service_events(void)
{
struct sk_buff *skb;
- while ((skb = skb_dequeue(&station->ev_q.list)) != NULL)
- llc_station_next_state(station, skb);
+ while ((skb = skb_dequeue(&llc_main_station.ev_q.list)) != NULL)
+ llc_station_next_state(skb);
}
/**
* llc_station_state_process: queue event and try to process queue.
- * @station: Address of the station
* @skb: Address of the event
*
* Queues an event (on the station event queue) for handling by the
* station state machine and attempts to process any queued-up events.
*/
-void llc_station_state_process(struct llc_station *station, struct sk_buff *skb)
+void llc_station_state_process(struct sk_buff *skb)
{
- spin_lock_bh(&station->ev_q.lock);
- skb_queue_tail(&station->ev_q.list, skb);
- llc_station_service_events(station);
- spin_unlock_bh(&station->ev_q.lock);
+ spin_lock_bh(&llc_main_station.ev_q.lock);
+ skb_queue_tail(&llc_main_station.ev_q.list, skb);
+ llc_station_service_events();
+ spin_unlock_bh(&llc_main_station.ev_q.lock);
}
-/**
- * llc_station_send_pdus - tries to send queued PDUs
- * @station: Address of the station
- *
- * Tries to send any PDUs queued in the station mac_pdu_q to the MAC
- * layer.
- */
-static void llc_station_send_pdus(struct llc_station *station)
+static void llc_station_ack_tmr_cb(unsigned long timeout_data)
{
- struct sk_buff *skb;
+ struct sk_buff *skb = alloc_skb(0, GFP_ATOMIC);
- while ((skb = skb_dequeue(&station->mac_pdu_q)) != NULL)
- if (dev_queue_xmit(skb))
- break;
-}
+ if (skb) {
+ struct llc_station_state_ev *ev = llc_station_ev(skb);
-/**
- * llc_station_send_pdu - queues PDU to send
- * @station: Address of the station
- * @skb: Address of the PDU
- *
- * Queues a PDU to send to the MAC layer.
- */
-void llc_station_send_pdu(struct llc_station *station, struct sk_buff *skb)
-{
- skb_queue_tail(&station->mac_pdu_q, skb);
- llc_station_send_pdus(station);
+ ev->type = LLC_STATION_EV_TYPE_ACK_TMR;
+ llc_station_state_process(skb);
+ }
}
/*
ev->type = LLC_STATION_EV_TYPE_PDU;
ev->reason = 0;
- llc_station_state_process(&llc_main_station, skb);
+ llc_station_state_process(skb);
}
int __init llc_station_init(void)
llc_main_station.state = LLC_STATION_STATE_DOWN;
ev->type = LLC_STATION_EV_TYPE_SIMPLE;
ev->prim_type = LLC_STATION_EV_ENABLE_WITHOUT_DUP_ADDR_CHECK;
- rc = llc_station_next_state(&llc_main_station, skb);
+ rc = llc_station_next_state(skb);
out:
return rc;
}
projects / linux / commitdiff