Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 231 insertions, 0 deletions

diff --git a/include/net/dn.h b/include/net/dn.h
new file mode 100644
index 000000000..56ab0726c
--- /dev/null
+++ b/include/net/dn.h
@@ -0,0 +1,231 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _NET_DN_H
+#define _NET_DN_H
+
+#include <linux/dn.h>
+#include <net/sock.h>
+#include <net/flow.h>
+#include <asm/byteorder.h>
+#include <asm/unaligned.h>
+
+struct dn_scp                                   /* Session Control Port */
+{
+        unsigned char           state;
+#define DN_O     1                      /* Open                 */
+#define DN_CR    2                      /* Connect Receive      */
+#define DN_DR    3                      /* Disconnect Reject    */
+#define DN_DRC   4                      /* Discon. Rej. Complete*/
+#define DN_CC    5                      /* Connect Confirm      */
+#define DN_CI    6                      /* Connect Initiate     */
+#define DN_NR    7                      /* No resources         */
+#define DN_NC    8                      /* No communication     */
+#define DN_CD    9                      /* Connect Delivery     */
+#define DN_RJ    10                     /* Rejected             */
+#define DN_RUN   11                     /* Running              */
+#define DN_DI    12                     /* Disconnect Initiate  */
+#define DN_DIC   13                     /* Disconnect Complete  */
+#define DN_DN    14                     /* Disconnect Notificat */
+#define DN_CL    15                     /* Closed               */
+#define DN_CN    16                     /* Closed Notification  */
+
+        __le16          addrloc;
+        __le16          addrrem;
+        __u16          numdat;
+        __u16          numoth;
+        __u16          numoth_rcv;
+        __u16          numdat_rcv;
+        __u16          ackxmt_dat;
+        __u16          ackxmt_oth;
+        __u16          ackrcv_dat;
+        __u16          ackrcv_oth;
+        __u8           flowrem_sw;
+	__u8           flowloc_sw;
+#define DN_SEND         2
+#define DN_DONTSEND     1
+#define DN_NOCHANGE     0
+	__u16		flowrem_dat;
+	__u16		flowrem_oth;
+	__u16		flowloc_dat;
+	__u16		flowloc_oth;
+	__u8		services_rem;
+	__u8		services_loc;
+	__u8		info_rem;
+	__u8		info_loc;
+
+	__u16		segsize_rem;
+	__u16		segsize_loc;
+
+	__u8		nonagle;
+	__u8		multi_ireq;
+	__u8		accept_mode;
+	unsigned long		seg_total; /* Running total of current segment */
+
+	struct optdata_dn     conndata_in;
+	struct optdata_dn     conndata_out;
+	struct optdata_dn     discdata_in;
+	struct optdata_dn     discdata_out;
+        struct accessdata_dn  accessdata;
+
+        struct sockaddr_dn addr; /* Local address  */
+	struct sockaddr_dn peer; /* Remote address */
+
+	/*
+	 * In this case the RTT estimation is not specified in the
+	 * docs, nor is any back off algorithm. Here we follow well
+	 * known tcp algorithms with a few small variations.
+	 *
+	 * snd_window: Max number of packets we send before we wait for
+	 *             an ack to come back. This will become part of a
+	 *             more complicated scheme when we support flow
+	 *             control.
+	 *
+	 * nsp_srtt:   Round-Trip-Time (x8) in jiffies. This is a rolling
+	 *             average.
+	 * nsp_rttvar: Round-Trip-Time-Varience (x4) in jiffies. This is the
+	 *             varience of the smoothed average (but calculated in
+	 *             a simpler way than for normal statistical varience
+	 *             calculations).
+	 *
+	 * nsp_rxtshift: Backoff counter. Value is zero normally, each time
+	 *               a packet is lost is increases by one until an ack
+	 *               is received. Its used to index an array of backoff
+	 *               multipliers.
+	 */
+#define NSP_MIN_WINDOW 1
+#define NSP_MAX_WINDOW (0x07fe)
+	unsigned long max_window;
+	unsigned long snd_window;
+#define NSP_INITIAL_SRTT (HZ)
+	unsigned long nsp_srtt;
+#define NSP_INITIAL_RTTVAR (HZ*3)
+	unsigned long nsp_rttvar;
+#define NSP_MAXRXTSHIFT 12
+	unsigned long nsp_rxtshift;
+
+	/*
+	 * Output queues, one for data, one for otherdata/linkservice
+	 */
+	struct sk_buff_head data_xmit_queue;
+	struct sk_buff_head other_xmit_queue;
+
+	/*
+	 * Input queue for other data
+	 */
+	struct sk_buff_head other_receive_queue;
+	int other_report;
+
+	/*
+	 * Stuff to do with the slow timer
+	 */
+	unsigned long stamp;          /* time of last transmit */
+	unsigned long persist;
+	int (*persist_fxn)(struct sock *sk);
+	unsigned long keepalive;
+	void (*keepalive_fxn)(struct sock *sk);
+
+};
+
+static inline struct dn_scp *DN_SK(struct sock *sk)
+{
+	return (struct dn_scp *)(sk + 1);
+}
+
+/*
+ * src,dst : Source and Destination DECnet addresses
+ * hops : Number of hops through the network
+ * dst_port, src_port : NSP port numbers
+ * services, info : Useful data extracted from conninit messages
+ * rt_flags : Routing flags byte
+ * nsp_flags : NSP layer flags byte
+ * segsize : Size of segment
+ * segnum : Number, for data, otherdata and linkservice
+ * xmit_count : Number of times we've transmitted this skb
+ * stamp : Time stamp of most recent transmission, used in RTT calculations
+ * iif: Input interface number
+ *
+ * As a general policy, this structure keeps all addresses in network
+ * byte order, and all else in host byte order. Thus dst, src, dst_port
+ * and src_port are in network order. All else is in host order.
+ * 
+ */
+#define DN_SKB_CB(skb) ((struct dn_skb_cb *)(skb)->cb)
+struct dn_skb_cb {
+	__le16 dst;
+	__le16 src;
+	__u16 hops;
+	__le16 dst_port;
+	__le16 src_port;
+	__u8 services;
+	__u8 info;
+	__u8 rt_flags;
+	__u8 nsp_flags;
+	__u16 segsize;
+	__u16 segnum;
+	__u16 xmit_count;
+	unsigned long stamp;
+	int iif;
+};
+
+static inline __le16 dn_eth2dn(unsigned char *ethaddr)
+{
+	return get_unaligned((__le16 *)(ethaddr + 4));
+}
+
+static inline __le16 dn_saddr2dn(struct sockaddr_dn *saddr)
+{
+	return *(__le16 *)saddr->sdn_nodeaddr;
+}
+
+static inline void dn_dn2eth(unsigned char *ethaddr, __le16 addr)
+{
+	__u16 a = le16_to_cpu(addr);
+	ethaddr[0] = 0xAA;
+	ethaddr[1] = 0x00;
+	ethaddr[2] = 0x04;
+	ethaddr[3] = 0x00;
+	ethaddr[4] = (__u8)(a & 0xff);
+	ethaddr[5] = (__u8)(a >> 8);
+}
+
+static inline void dn_sk_ports_copy(struct flowidn *fld, struct dn_scp *scp)
+{
+	fld->fld_sport = scp->addrloc;
+	fld->fld_dport = scp->addrrem;
+}
+
+unsigned int dn_mss_from_pmtu(struct net_device *dev, int mtu);
+void dn_register_sysctl(void);
+void dn_unregister_sysctl(void);
+
+#define DN_MENUVER_ACC 0x01
+#define DN_MENUVER_USR 0x02
+#define DN_MENUVER_PRX 0x04
+#define DN_MENUVER_UIC 0x08
+
+struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr);
+struct sock *dn_find_by_skb(struct sk_buff *skb);
+#define DN_ASCBUF_LEN 9
+char *dn_addr2asc(__u16, char *);
+int dn_destroy_timer(struct sock *sk);
+
+int dn_sockaddr2username(struct sockaddr_dn *addr, unsigned char *buf,
+			 unsigned char type);
+int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *addr,
+			 unsigned char *type);
+
+void dn_start_slow_timer(struct sock *sk);
+void dn_stop_slow_timer(struct sock *sk);
+
+extern __le16 decnet_address;
+extern int decnet_debug_level;
+extern int decnet_time_wait;
+extern int decnet_dn_count;
+extern int decnet_di_count;
+extern int decnet_dr_count;
+extern int decnet_no_fc_max_cwnd;
+
+extern long sysctl_decnet_mem[3];
+extern int sysctl_decnet_wmem[3];
+extern int sysctl_decnet_rmem[3];
+
+#endif /* _NET_DN_H */