2005-04-16 22:20:36 +00:00
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/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* HIPPI-type device handling.
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*
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* Version: @(#)hippi.c 1.0.0 05/29/97
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*
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2005-05-05 23:16:16 +00:00
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* Authors: Ross Biro
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2005-04-16 22:20:36 +00:00
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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* Mark Evans, <evansmp@uhura.aston.ac.uk>
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* Florian La Roche, <rzsfl@rz.uni-sb.de>
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* Alan Cox, <gw4pts@gw4pts.ampr.org>
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* Jes Sorensen, <Jes.Sorensen@cern.ch>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/socket.h>
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#include <linux/in.h>
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#include <linux/inet.h>
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#include <linux/netdevice.h>
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#include <linux/hippidevice.h>
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#include <linux/skbuff.h>
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#include <linux/errno.h>
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#include <net/arp.h>
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#include <net/sock.h>
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2016-12-24 19:46:01 +00:00
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#include <linux/uaccess.h>
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2005-04-16 22:20:36 +00:00
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/*
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2007-02-09 14:24:24 +00:00
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* Create the HIPPI MAC header for an arbitrary protocol layer
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2005-04-16 22:20:36 +00:00
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*
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* saddr=NULL means use device source address
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* daddr=NULL means leave destination address (eg unresolved arp)
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*/
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static int hippi_header(struct sk_buff *skb, struct net_device *dev,
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2007-10-09 08:40:57 +00:00
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unsigned short type,
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2012-04-15 05:58:06 +00:00
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const void *daddr, const void *saddr, unsigned int len)
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2005-04-16 22:20:36 +00:00
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{
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struct hippi_hdr *hip = (struct hippi_hdr *)skb_push(skb, HIPPI_HLEN);
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2005-08-10 02:31:17 +00:00
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struct hippi_cb *hcb = (struct hippi_cb *) skb->cb;
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2005-04-16 22:20:36 +00:00
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if (!len){
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len = skb->len - HIPPI_HLEN;
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printk("hippi_header(): length not supplied\n");
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}
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/*
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* Due to the stupidity of the little endian byte-order we
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* have to set the fp field this way.
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*/
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2007-03-26 03:11:55 +00:00
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hip->fp.fixed = htonl(0x04800018);
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2005-04-16 22:20:36 +00:00
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hip->fp.d2_size = htonl(len + 8);
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hip->le.fc = 0;
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hip->le.double_wide = 0; /* only HIPPI 800 for the time being */
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hip->le.message_type = 0; /* Data PDU */
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hip->le.dest_addr_type = 2; /* 12 bit SC address */
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hip->le.src_addr_type = 2; /* 12 bit SC address */
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memcpy(hip->le.src_switch_addr, dev->dev_addr + 3, 3);
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memset(&hip->le.reserved, 0, 16);
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hip->snap.dsap = HIPPI_EXTENDED_SAP;
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hip->snap.ssap = HIPPI_EXTENDED_SAP;
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hip->snap.ctrl = HIPPI_UI_CMD;
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hip->snap.oui[0] = 0x00;
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hip->snap.oui[1] = 0x00;
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hip->snap.oui[2] = 0x00;
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hip->snap.ethertype = htons(type);
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if (daddr)
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{
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memcpy(hip->le.dest_switch_addr, daddr + 3, 3);
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2005-08-10 02:31:17 +00:00
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memcpy(&hcb->ifield, daddr + 2, 4);
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2005-04-16 22:20:36 +00:00
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return HIPPI_HLEN;
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}
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2005-08-10 02:31:17 +00:00
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hcb->ifield = 0;
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2005-04-16 22:20:36 +00:00
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return -((int)HIPPI_HLEN);
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}
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/*
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* Determine the packet's protocol ID.
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*/
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2007-02-09 14:24:24 +00:00
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2005-08-25 23:06:19 +00:00
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__be16 hippi_type_trans(struct sk_buff *skb, struct net_device *dev)
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2005-04-16 22:20:36 +00:00
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{
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struct hippi_hdr *hip;
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2007-02-09 14:24:24 +00:00
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2005-04-16 22:20:36 +00:00
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/*
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* This is actually wrong ... question is if we really should
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* set the raw address here.
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*/
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2007-03-10 13:57:13 +00:00
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skb->dev = dev;
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2007-03-19 22:30:44 +00:00
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skb_reset_mac_header(skb);
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2007-03-19 22:33:04 +00:00
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hip = (struct hippi_hdr *)skb_mac_header(skb);
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2007-03-10 13:57:13 +00:00
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skb_pull(skb, HIPPI_HLEN);
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2005-04-16 22:20:36 +00:00
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/*
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* No fancy promisc stuff here now.
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*/
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return hip->snap.ethertype;
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}
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EXPORT_SYMBOL(hippi_type_trans);
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/*
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* For HIPPI we will actually use the lower 4 bytes of the hardware
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* address as the I-FIELD rather than the actual hardware address.
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*/
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2008-11-21 04:32:15 +00:00
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int hippi_mac_addr(struct net_device *dev, void *p)
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2005-04-16 22:20:36 +00:00
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{
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struct sockaddr *addr = p;
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if (netif_running(dev))
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return -EBUSY;
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memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
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return 0;
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}
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2008-11-21 04:32:15 +00:00
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EXPORT_SYMBOL(hippi_mac_addr);
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2005-04-16 22:20:36 +00:00
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2008-11-21 04:32:15 +00:00
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int hippi_neigh_setup_dev(struct net_device *dev, struct neigh_parms *p)
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2005-04-16 22:20:36 +00:00
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{
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/* Never send broadcast/multicast ARP messages */
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2014-01-09 13:13:47 +00:00
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NEIGH_VAR_INIT(p, MCAST_PROBES, 0);
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2007-02-09 14:24:24 +00:00
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2005-04-16 22:20:36 +00:00
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/* In IPv6 unicast probes are valid even on NBMA,
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* because they are encapsulated in normal IPv6 protocol.
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2007-02-09 14:24:24 +00:00
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* Should be a generic flag.
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2005-04-16 22:20:36 +00:00
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*/
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if (p->tbl->family != AF_INET6)
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2014-01-09 13:13:47 +00:00
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NEIGH_VAR_INIT(p, UCAST_PROBES, 0);
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2005-04-16 22:20:36 +00:00
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return 0;
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}
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2008-11-21 04:32:15 +00:00
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EXPORT_SYMBOL(hippi_neigh_setup_dev);
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2005-04-16 22:20:36 +00:00
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2007-10-09 08:40:57 +00:00
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static const struct header_ops hippi_header_ops = {
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.create = hippi_header,
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};
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2005-04-16 22:20:36 +00:00
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static void hippi_setup(struct net_device *dev)
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{
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2008-11-21 04:32:15 +00:00
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dev->header_ops = &hippi_header_ops;
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2005-04-16 22:20:36 +00:00
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/*
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* We don't support HIPPI `ARP' for the time being, and probably
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* never will unless someone else implements it. However we
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* still need a fake ARPHRD to make ifconfig and friends play ball.
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*/
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dev->type = ARPHRD_HIPPI;
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dev->hard_header_len = HIPPI_HLEN;
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dev->mtu = 65280;
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net: use core MTU range checking in misc drivers
firewire-net:
- set min/max_mtu
- remove fwnet_change_mtu
nes:
- set max_mtu
- clean up nes_netdev_change_mtu
xpnet:
- set min/max_mtu
- remove xpnet_dev_change_mtu
hippi:
- set min/max_mtu
- remove hippi_change_mtu
batman-adv:
- set max_mtu
- remove batadv_interface_change_mtu
- initialization is a little async, not 100% certain that max_mtu is set
in the optimal place, don't have hardware to test with
rionet:
- set min/max_mtu
- remove rionet_change_mtu
slip:
- set min/max_mtu
- streamline sl_change_mtu
um/net_kern:
- remove pointless ndo_change_mtu
hsi/clients/ssi_protocol:
- use core MTU range checking
- remove now redundant ssip_pn_set_mtu
ipoib:
- set a default max MTU value
- Note: ipoib's actual max MTU can vary, depending on if the device is in
connected mode or not, so we'll just set the max_mtu value to the max
possible, and let the ndo_change_mtu function continue to validate any new
MTU change requests with checks for CM or not. Note that ipoib has no
min_mtu set, and thus, the network core's mtu > 0 check is the only lower
bounds here.
mptlan:
- use net core MTU range checking
- remove now redundant mpt_lan_change_mtu
fddi:
- min_mtu = 21, max_mtu = 4470
- remove now redundant fddi_change_mtu (including export)
fjes:
- min_mtu = 8192, max_mtu = 65536
- The max_mtu value is actually one over IP_MAX_MTU here, but the idea is to
get past the core net MTU range checks so fjes_change_mtu can validate a
new MTU against what it supports (see fjes_support_mtu in fjes_hw.c)
hsr:
- min_mtu = 0 (calls ether_setup, max_mtu is 1500)
f_phonet:
- min_mtu = 6, max_mtu = 65541
u_ether:
- min_mtu = 14, max_mtu = 15412
phonet/pep-gprs:
- min_mtu = 576, max_mtu = 65530
- remove redundant gprs_set_mtu
CC: netdev@vger.kernel.org
CC: linux-rdma@vger.kernel.org
CC: Stefan Richter <stefanr@s5r6.in-berlin.de>
CC: Faisal Latif <faisal.latif@intel.com>
CC: linux-rdma@vger.kernel.org
CC: Cliff Whickman <cpw@sgi.com>
CC: Robin Holt <robinmholt@gmail.com>
CC: Jes Sorensen <jes@trained-monkey.org>
CC: Marek Lindner <mareklindner@neomailbox.ch>
CC: Simon Wunderlich <sw@simonwunderlich.de>
CC: Antonio Quartulli <a@unstable.cc>
CC: Sathya Prakash <sathya.prakash@broadcom.com>
CC: Chaitra P B <chaitra.basappa@broadcom.com>
CC: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>
CC: MPT-FusionLinux.pdl@broadcom.com
CC: Sebastian Reichel <sre@kernel.org>
CC: Felipe Balbi <balbi@kernel.org>
CC: Arvid Brodin <arvid.brodin@alten.se>
CC: Remi Denis-Courmont <courmisch@gmail.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-20 17:55:22 +00:00
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dev->min_mtu = 68;
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dev->max_mtu = 65280;
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2005-04-16 22:20:36 +00:00
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dev->addr_len = HIPPI_ALEN;
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dev->tx_queue_len = 25 /* 5 */;
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memset(dev->broadcast, 0xFF, HIPPI_ALEN);
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/*
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* HIPPI doesn't support broadcast+multicast and we only use
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2007-02-09 14:24:24 +00:00
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* static ARP tables. ARP is disabled by hippi_neigh_setup_dev.
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2005-04-16 22:20:36 +00:00
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*/
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2007-02-09 14:24:24 +00:00
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dev->flags = 0;
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2005-04-16 22:20:36 +00:00
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}
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/**
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* alloc_hippi_dev - Register HIPPI device
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* @sizeof_priv: Size of additional driver-private structure to be allocated
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* for this HIPPI device
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*
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* Fill in the fields of the device structure with HIPPI-generic values.
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*
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* Constructs a new net device, complete with a private data area of
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* size @sizeof_priv. A 32-byte (not bit) alignment is enforced for
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* this private data area.
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*/
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struct net_device *alloc_hippi_dev(int sizeof_priv)
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{
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net: set name_assign_type in alloc_netdev()
Extend alloc_netdev{,_mq{,s}}() to take name_assign_type as argument, and convert
all users to pass NET_NAME_UNKNOWN.
Coccinelle patch:
@@
expression sizeof_priv, name, setup, txqs, rxqs, count;
@@
(
-alloc_netdev_mqs(sizeof_priv, name, setup, txqs, rxqs)
+alloc_netdev_mqs(sizeof_priv, name, NET_NAME_UNKNOWN, setup, txqs, rxqs)
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-alloc_netdev_mq(sizeof_priv, name, setup, count)
+alloc_netdev_mq(sizeof_priv, name, NET_NAME_UNKNOWN, setup, count)
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-alloc_netdev(sizeof_priv, name, setup)
+alloc_netdev(sizeof_priv, name, NET_NAME_UNKNOWN, setup)
)
v9: move comments here from the wrong commit
Signed-off-by: Tom Gundersen <teg@jklm.no>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-14 14:37:24 +00:00
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return alloc_netdev(sizeof_priv, "hip%d", NET_NAME_UNKNOWN,
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hippi_setup);
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2005-04-16 22:20:36 +00:00
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}
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EXPORT_SYMBOL(alloc_hippi_dev);
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