^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) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * INET An implementation of the TCP/IP protocol suite for the LINUX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * operating system. INET is implemented using the BSD Socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * interface as the means of communication with the user level.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * HIPPI-type device handling.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Version: @(#)hippi.c 1.0.0 05/29/97
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Authors: Ross Biro
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * Mark Evans, <evansmp@uhura.aston.ac.uk>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * Florian La Roche, <rzsfl@rz.uni-sb.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * Alan Cox, <gw4pts@gw4pts.ampr.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * Jes Sorensen, <Jes.Sorensen@cern.ch>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/socket.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/in.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/inet.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/hippidevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <net/arp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * Create the HIPPI MAC header for an arbitrary protocol layer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * saddr=NULL means use device source address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * daddr=NULL means leave destination address (eg unresolved arp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static int hippi_header(struct sk_buff *skb, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) unsigned short type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) const void *daddr, const void *saddr, unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct hippi_hdr *hip = skb_push(skb, HIPPI_HLEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct hippi_cb *hcb = (struct hippi_cb *) skb->cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if (!len){
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) len = skb->len - HIPPI_HLEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) printk("hippi_header(): length not supplied\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * Due to the stupidity of the little endian byte-order we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * have to set the fp field this way.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) hip->fp.fixed = htonl(0x04800018);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) hip->fp.d2_size = htonl(len + 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) hip->le.fc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) hip->le.double_wide = 0; /* only HIPPI 800 for the time being */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) hip->le.message_type = 0; /* Data PDU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) hip->le.dest_addr_type = 2; /* 12 bit SC address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) hip->le.src_addr_type = 2; /* 12 bit SC address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) memcpy(hip->le.src_switch_addr, dev->dev_addr + 3, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) memset(&hip->le.reserved, 0, 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) hip->snap.dsap = HIPPI_EXTENDED_SAP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) hip->snap.ssap = HIPPI_EXTENDED_SAP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) hip->snap.ctrl = HIPPI_UI_CMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) hip->snap.oui[0] = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) hip->snap.oui[1] = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) hip->snap.oui[2] = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) hip->snap.ethertype = htons(type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) if (daddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) memcpy(hip->le.dest_switch_addr, daddr + 3, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) memcpy(&hcb->ifield, daddr + 2, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return HIPPI_HLEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) hcb->ifield = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return -((int)HIPPI_HLEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) * Determine the packet's protocol ID.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) __be16 hippi_type_trans(struct sk_buff *skb, struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) struct hippi_hdr *hip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * This is actually wrong ... question is if we really should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * set the raw address here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) skb->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) skb_reset_mac_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) hip = (struct hippi_hdr *)skb_mac_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) skb_pull(skb, HIPPI_HLEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * No fancy promisc stuff here now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) return hip->snap.ethertype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) EXPORT_SYMBOL(hippi_type_trans);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) * For HIPPI we will actually use the lower 4 bytes of the hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * address as the I-FIELD rather than the actual hardware address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) int hippi_mac_addr(struct net_device *dev, void *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) struct sockaddr *addr = p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (netif_running(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) EXPORT_SYMBOL(hippi_mac_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) int hippi_neigh_setup_dev(struct net_device *dev, struct neigh_parms *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) /* Never send broadcast/multicast ARP messages */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) NEIGH_VAR_INIT(p, MCAST_PROBES, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) /* In IPv6 unicast probes are valid even on NBMA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * because they are encapsulated in normal IPv6 protocol.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * Should be a generic flag.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (p->tbl->family != AF_INET6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) NEIGH_VAR_INIT(p, UCAST_PROBES, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) EXPORT_SYMBOL(hippi_neigh_setup_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static const struct header_ops hippi_header_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) .create = hippi_header,
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static void hippi_setup(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) dev->header_ops = &hippi_header_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) * We don't support HIPPI `ARP' for the time being, and probably
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * never will unless someone else implements it. However we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * still need a fake ARPHRD to make ifconfig and friends play ball.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) dev->type = ARPHRD_HIPPI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) dev->hard_header_len = HIPPI_HLEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) dev->mtu = 65280;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) dev->min_mtu = 68;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) dev->max_mtu = 65280;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) dev->addr_len = HIPPI_ALEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) dev->tx_queue_len = 25 /* 5 */;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) memset(dev->broadcast, 0xFF, HIPPI_ALEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) * HIPPI doesn't support broadcast+multicast and we only use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) * static ARP tables. ARP is disabled by hippi_neigh_setup_dev.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) dev->flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) * alloc_hippi_dev - Register HIPPI device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) * @sizeof_priv: Size of additional driver-private structure to be allocated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) * for this HIPPI device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) * Fill in the fields of the device structure with HIPPI-generic values.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) * Constructs a new net device, complete with a private data area of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) * size @sizeof_priv. A 32-byte (not bit) alignment is enforced for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) * this private data area.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) struct net_device *alloc_hippi_dev(int sizeof_priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) return alloc_netdev(sizeof_priv, "hip%d", NET_NAME_UNKNOWN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) hippi_setup);
^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) EXPORT_SYMBOL(alloc_hippi_dev);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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