^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #ifndef _NET_DN_NSP_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #define _NET_DN_NSP_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) /******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) (c) 1995-1998 E.M. Serrat emserrat@geocities.com
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) /* dn_nsp.c functions prototyping */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) void dn_nsp_send_data_ack(struct sock *sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) void dn_nsp_send_oth_ack(struct sock *sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) void dn_send_conn_ack(struct sock *sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) void dn_send_conn_conf(struct sock *sk, gfp_t gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) void dn_nsp_send_disc(struct sock *sk, unsigned char type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) unsigned short reason, gfp_t gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) void dn_nsp_return_disc(struct sk_buff *skb, unsigned char type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) unsigned short reason);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) void dn_nsp_send_link(struct sock *sk, unsigned char lsflags, char fcval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) void dn_nsp_send_conninit(struct sock *sk, unsigned char flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) void dn_nsp_output(struct sock *sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) int dn_nsp_check_xmit_queue(struct sock *sk, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct sk_buff_head *q, unsigned short acknum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) void dn_nsp_queue_xmit(struct sock *sk, struct sk_buff *skb, gfp_t gfp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) int oob);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) unsigned long dn_nsp_persist(struct sock *sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) int dn_nsp_xmit_timeout(struct sock *sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) int dn_nsp_rx(struct sk_buff *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) int dn_nsp_backlog_rcv(struct sock *sk, struct sk_buff *skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct sk_buff *dn_alloc_send_skb(struct sock *sk, size_t *size, int noblock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) long timeo, int *err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define NSP_REASON_OK 0 /* No error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define NSP_REASON_NR 1 /* No resources */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define NSP_REASON_UN 2 /* Unrecognised node name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define NSP_REASON_SD 3 /* Node shutting down */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define NSP_REASON_ID 4 /* Invalid destination end user */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define NSP_REASON_ER 5 /* End user lacks resources */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define NSP_REASON_OB 6 /* Object too busy */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define NSP_REASON_US 7 /* Unspecified error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define NSP_REASON_TP 8 /* Third-Party abort */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define NSP_REASON_EA 9 /* End user has aborted the link */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define NSP_REASON_IF 10 /* Invalid node name format */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define NSP_REASON_LS 11 /* Local node shutdown */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define NSP_REASON_LL 32 /* Node lacks logical-link resources */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define NSP_REASON_LE 33 /* End user lacks logical-link resources */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define NSP_REASON_UR 34 /* Unacceptable RQSTRID or PASSWORD field */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define NSP_REASON_UA 36 /* Unacceptable ACCOUNT field */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define NSP_REASON_TM 38 /* End user timed out logical link */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define NSP_REASON_NU 39 /* Node unreachable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define NSP_REASON_NL 41 /* No-link message */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define NSP_REASON_DC 42 /* Disconnect confirm */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define NSP_REASON_IO 43 /* Image data field overflow */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define NSP_DISCINIT 0x38
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define NSP_DISCCONF 0x48
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) /*------------------------- NSP - messages ------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /* Data Messages */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) /*---------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) /* Data Messages (data segment/interrupt/link service) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct nsp_data_seg_msg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) __u8 msgflg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) __le16 dstaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) __le16 srcaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct nsp_data_opt_msg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) __le16 acknum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) __le16 segnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) __le16 lsflgs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct nsp_data_opt_msg1 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) __le16 acknum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) __le16 segnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) /* Acknowledgment Message (data/other data) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct nsp_data_ack_msg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) __u8 msgflg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) __le16 dstaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) __le16 srcaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) __le16 acknum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) /* Connect Acknowledgment Message */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) struct nsp_conn_ack_msg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) __u8 msgflg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) __le16 dstaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) /* Connect Initiate/Retransmit Initiate/Connect Confirm */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct nsp_conn_init_msg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) __u8 msgflg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #define NSP_CI 0x18 /* Connect Initiate */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) #define NSP_RCI 0x68 /* Retrans. Conn Init */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) __le16 dstaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) __le16 srcaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) __u8 services;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #define NSP_FC_NONE 0x00 /* Flow Control None */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #define NSP_FC_SRC 0x04 /* Seg Req. Count */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) #define NSP_FC_SCMC 0x08 /* Sess. Control Mess */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) #define NSP_FC_MASK 0x0c /* FC type mask */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) __u8 info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) __le16 segsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) /* Disconnect Initiate/Disconnect Confirm */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct nsp_disconn_init_msg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) __u8 msgflg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) __le16 dstaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) __le16 srcaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) __le16 reason;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) struct srcobj_fmt {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) __u8 format;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) __u8 task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) __le16 grpcode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) __le16 usrcode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) __u8 dlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * A collection of functions for manipulating the sequence
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * numbers used in NSP. Similar in operation to the functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * of the same name in TCP.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static __inline__ int dn_before(__u16 seq1, __u16 seq2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) seq1 &= 0x0fff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) seq2 &= 0x0fff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return (int)((seq1 - seq2) & 0x0fff) > 2048;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) static __inline__ int dn_after(__u16 seq1, __u16 seq2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) seq1 &= 0x0fff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) seq2 &= 0x0fff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) return (int)((seq2 - seq1) & 0x0fff) > 2048;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static __inline__ int dn_equal(__u16 seq1, __u16 seq2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return ((seq1 ^ seq2) & 0x0fff) == 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static __inline__ int dn_before_or_equal(__u16 seq1, __u16 seq2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) return (dn_before(seq1, seq2) || dn_equal(seq1, seq2));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) static __inline__ void seq_add(__u16 *seq, __u16 off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) (*seq) += off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) (*seq) &= 0x0fff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) static __inline__ int seq_next(__u16 seq1, __u16 seq2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) return dn_equal(seq1 + 1, seq2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) * Can we delay the ack ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) static __inline__ int sendack(__u16 seq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) return (int)((seq & 0x1000) ? 0 : 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) * Is socket congested ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) static __inline__ int dn_congested(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) return atomic_read(&sk->sk_rmem_alloc) > (sk->sk_rcvbuf >> 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) #define DN_MAX_NSP_DATA_HEADER (11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) #endif /* _NET_DN_NSP_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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