1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Layer 2 defines 4 * 5 * Copyright 2008 by Karsten Keil <kkeil@novell.com> 6 */ 7 8 #include <linux/mISDNif.h> 9 #include <linux/skbuff.h> 10 #include "fsm.h" 11 12 #define MAX_WINDOW 8 13 14 struct manager { 15 struct mISDNchannel ch; 16 struct mISDNchannel bcast; 17 u_long options; 18 struct list_head layer2; 19 rwlock_t lock; 20 struct FsmInst deact; 21 struct FsmTimer datimer; 22 struct sk_buff_head sendq; 23 struct mISDNchannel *up; 24 u_int nextid; 25 u_int lastid; 26 }; 27 28 struct teimgr { 29 int ri; 30 int rcnt; 31 struct FsmInst tei_m; 32 struct FsmTimer timer; 33 int tval, nval; 34 struct layer2 *l2; 35 struct manager *mgr; 36 }; 37 38 struct laddr { 39 u_char A; 40 u_char B; 41 }; 42 43 struct layer2 { 44 struct list_head list; 45 struct mISDNchannel ch; 46 u_long flag; 47 int id; 48 struct mISDNchannel *up; 49 signed char sapi; 50 signed char tei; 51 struct laddr addr; 52 u_int maxlen; 53 struct teimgr *tm; 54 u_int vs, va, vr; 55 int rc; 56 u_int window; 57 u_int sow; 58 struct FsmInst l2m; 59 struct FsmTimer t200, t203; 60 int T200, N200, T203; 61 u_int next_id; 62 u_int down_id; 63 struct sk_buff *windowar[MAX_WINDOW]; 64 struct sk_buff_head i_queue; 65 struct sk_buff_head ui_queue; 66 struct sk_buff_head down_queue; 67 struct sk_buff_head tmp_queue; 68 }; 69 70 enum { 71 ST_L2_1, 72 ST_L2_2, 73 ST_L2_3, 74 ST_L2_4, 75 ST_L2_5, 76 ST_L2_6, 77 ST_L2_7, 78 ST_L2_8, 79 }; 80 81 #define L2_STATE_COUNT (ST_L2_8 + 1) 82 83 extern struct layer2 *create_l2(struct mISDNchannel *, u_int, 84 u_long, int, int); 85 extern int tei_l2(struct layer2 *, u_int, u_long arg); 86 87 88 /* from tei.c */ 89 extern int l2_tei(struct layer2 *, u_int, u_long arg); 90 extern void TEIrelease(struct layer2 *); 91 extern int TEIInit(u_int *); 92 extern void TEIFree(void); 93 94 #define MAX_L2HEADER_LEN 4 95 96 #define RR 0x01 97 #define RNR 0x05 98 #define REJ 0x09 99 #define SABME 0x6f 100 #define SABM 0x2f 101 #define DM 0x0f 102 #define UI 0x03 103 #define DISC 0x43 104 #define UA 0x63 105 #define FRMR 0x87 106 #define XID 0xaf 107 108 #define CMD 0 109 #define RSP 1 110 111 #define LC_FLUSH_WAIT 1 112 113 #define FLG_LAPB 0 114 #define FLG_LAPD 1 115 #define FLG_ORIG 2 116 #define FLG_MOD128 3 117 #define FLG_PEND_REL 4 118 #define FLG_L3_INIT 5 119 #define FLG_T200_RUN 6 120 #define FLG_ACK_PEND 7 121 #define FLG_REJEXC 8 122 #define FLG_OWN_BUSY 9 123 #define FLG_PEER_BUSY 10 124 #define FLG_DCHAN_BUSY 11 125 #define FLG_L1_ACTIV 12 126 #define FLG_ESTAB_PEND 13 127 #define FLG_PTP 14 128 #define FLG_FIXED_TEI 15 129 #define FLG_L2BLOCK 16 130 #define FLG_L1_NOTREADY 17 131 #define FLG_LAPD_NET 18 132