cregit-Linux how code gets into the kernel

Release 4.14 net/802/hippi.c

Directory: net/802
/*
 * INET         An implementation of the TCP/IP protocol suite for the LINUX
 *              operating system.  INET is implemented using the  BSD Socket
 *              interface as the means of communication with the user level.
 *
 *              HIPPI-type device handling.
 *
 * Version:     @(#)hippi.c     1.0.0   05/29/97
 *
 * Authors:     Ross Biro
 *              Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
 *              Mark Evans, <evansmp@uhura.aston.ac.uk>
 *              Florian  La Roche, <rzsfl@rz.uni-sb.de>
 *              Alan Cox, <gw4pts@gw4pts.ampr.org>
 *              Jes Sorensen, <Jes.Sorensen@cern.ch>
 *
 *              This program is free software; you can redistribute it and/or
 *              modify it under the terms of the GNU General Public License
 *              as published by the Free Software Foundation; either version
 *              2 of the License, or (at your option) any later version.
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/hippidevice.h>
#include <linux/skbuff.h>
#include <linux/errno.h>
#include <net/arp.h>
#include <net/sock.h>
#include <linux/uaccess.h>

/*
 * Create the HIPPI MAC header for an arbitrary protocol layer
 *
 * saddr=NULL   means use device source address
 * daddr=NULL   means leave destination address (eg unresolved arp)
 */


static int hippi_header(struct sk_buff *skb, struct net_device *dev, unsigned short type, const void *daddr, const void *saddr, unsigned int len) { struct hippi_hdr *hip = skb_push(skb, HIPPI_HLEN); struct hippi_cb *hcb = (struct hippi_cb *) skb->cb; if (!len){ len = skb->len - HIPPI_HLEN; printk("hippi_header(): length not supplied\n"); } /* * Due to the stupidity of the little endian byte-order we * have to set the fp field this way. */ hip->fp.fixed = htonl(0x04800018); hip->fp.d2_size = htonl(len + 8); hip->le.fc = 0; hip->le.double_wide = 0; /* only HIPPI 800 for the time being */ hip->le.message_type = 0; /* Data PDU */ hip->le.dest_addr_type = 2; /* 12 bit SC address */ hip->le.src_addr_type = 2; /* 12 bit SC address */ memcpy(hip->le.src_switch_addr, dev->dev_addr + 3, 3); memset(&hip->le.reserved, 0, 16); hip->snap.dsap = HIPPI_EXTENDED_SAP; hip->snap.ssap = HIPPI_EXTENDED_SAP; hip->snap.ctrl = HIPPI_UI_CMD; hip->snap.oui[0] = 0x00; hip->snap.oui[1] = 0x00; hip->snap.oui[2] = 0x00; hip->snap.ethertype = htons(type); if (daddr) { memcpy(hip->le.dest_switch_addr, daddr + 3, 3); memcpy(&hcb->ifield, daddr + 2, 4); return HIPPI_HLEN; } hcb->ifield = 0; return -((int)HIPPI_HLEN); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)27089.70%225.00%
Stephen Hemminger237.64%225.00%
Linus Torvalds51.66%112.50%
Adrian Bunk10.33%112.50%
Eric Dumazet10.33%112.50%
Hideaki Yoshifuji / 吉藤英明10.33%112.50%
Total301100.00%8100.00%

/* * Determine the packet's protocol ID. */
__be16 hippi_type_trans(struct sk_buff *skb, struct net_device *dev) { struct hippi_hdr *hip; /* * This is actually wrong ... question is if we really should * set the raw address here. */ skb->dev = dev; skb_reset_mac_header(skb); hip = (struct hippi_hdr *)skb_mac_header(skb); skb_pull(skb, HIPPI_HLEN); /* * No fancy promisc stuff here now. */ return hip->snap.ethertype; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)3966.10%233.33%
Arnaldo Carvalho de Melo1932.20%350.00%
Alexey Dobriyan11.69%116.67%
Total59100.00%6100.00%

EXPORT_SYMBOL(hippi_type_trans); /* * For HIPPI we will actually use the lower 4 bytes of the hardware * address as the I-FIELD rather than the actual hardware address. */
int hippi_mac_addr(struct net_device *dev, void *p) { struct sockaddr *addr = p; if (netif_running(dev)) return -EBUSY; memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Christoph Hellwig50100.00%1100.00%
Total50100.00%1100.00%

EXPORT_SYMBOL(hippi_mac_addr);
int hippi_neigh_setup_dev(struct net_device *dev, struct neigh_parms *p) { /* Never send broadcast/multicast ARP messages */ NEIGH_VAR_INIT(p, MCAST_PROBES, 0); /* In IPv6 unicast probes are valid even on NBMA, * because they are encapsulated in normal IPv6 protocol. * Should be a generic flag. */ if (p->tbl->family != AF_INET6) NEIGH_VAR_INIT(p, UCAST_PROBES, 0); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Christoph Hellwig3572.92%125.00%
Jiri Pirko1225.00%250.00%
Hideaki Yoshifuji / 吉藤英明12.08%125.00%
Total48100.00%4100.00%

EXPORT_SYMBOL(hippi_neigh_setup_dev); static const struct header_ops hippi_header_ops = { .create = hippi_header, };
static void hippi_setup(struct net_device *dev) { dev->header_ops = &hippi_header_ops; /* * We don't support HIPPI `ARP' for the time being, and probably * never will unless someone else implements it. However we * still need a fake ARPHRD to make ifconfig and friends play ball. */ dev->type = ARPHRD_HIPPI; dev->hard_header_len = HIPPI_HLEN; dev->mtu = 65280; dev->min_mtu = 68; dev->max_mtu = 65280; dev->addr_len = HIPPI_ALEN; dev->tx_queue_len = 25 /* 5 */; memset(dev->broadcast, 0xFF, HIPPI_ALEN); /* * HIPPI doesn't support broadcast+multicast and we only use * static ARP tables. ARP is disabled by hippi_neigh_setup_dev. */ dev->flags = 0; }

Contributors

PersonTokensPropCommitsCommitProp
Christoph Hellwig6075.00%125.00%
Jarod Wilson1215.00%125.00%
Stephen Hemminger78.75%125.00%
Hideaki Yoshifuji / 吉藤英明11.25%125.00%
Total80100.00%4100.00%

/** * alloc_hippi_dev - Register HIPPI device * @sizeof_priv: Size of additional driver-private structure to be allocated * for this HIPPI device * * Fill in the fields of the device structure with HIPPI-generic values. * * Constructs a new net device, complete with a private data area of * size @sizeof_priv. A 32-byte (not bit) alignment is enforced for * this private data area. */
struct net_device *alloc_hippi_dev(int sizeof_priv) { return alloc_netdev(sizeof_priv, "hip%d", NET_NAME_UNKNOWN, hippi_setup); }

Contributors

PersonTokensPropCommitsCommitProp
Christoph Hellwig2090.91%150.00%
Tom Gundersen29.09%150.00%
Total22100.00%2100.00%

EXPORT_SYMBOL(alloc_hippi_dev);

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)35154.59%29.09%
Christoph Hellwig17226.75%14.55%
Stephen Hemminger538.24%313.64%
Arnaldo Carvalho de Melo274.20%418.18%
Jarod Wilson121.87%14.55%
Jiri Pirko121.87%29.09%
Linus Torvalds60.93%29.09%
Hideaki Yoshifuji / 吉藤英明40.62%29.09%
Tom Gundersen20.31%14.55%
Eric Dumazet10.16%14.55%
Alexey Dobriyan10.16%14.55%
Jesper Juhl10.16%14.55%
Adrian Bunk10.16%14.55%
Total643100.00%22100.00%
Directory: net/802
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