/*
* NET3: Token ring device handling subroutines
- *
+ *
* 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
* 22 Jun 98 Paul Norton <p.norton@computer.org> Rearranged
* tr_header and tr_type_trans to handle passing IPX SNAP and
* 802.2 through the correct layers. Eliminated tr_reformat.
- *
+ *
*/
#include <asm/uaccess.h>
/*
* Each RIF entry we learn is kept this way
*/
-
+
struct rif_cache {
unsigned char addr[TR_ALEN];
int iface;
* We hash the RIF cache 32 ways. We do after all have to look it
* up a lot.
*/
-
+
static struct rif_cache *rif_table[RIF_TABLE_SIZE];
static DEFINE_SPINLOCK(rif_lock);
/*
* Garbage disposal timer.
*/
-
+
static struct timer_list rif_timer;
int sysctl_tr_rif_timeout = 60*10*HZ;
* Put the headers on a token ring packet. Token ring source routing
* makes this a little more exciting than on ethernet.
*/
-
+
static int tr_header(struct sk_buff *skb, struct net_device *dev,
unsigned short type,
- void *daddr, void *saddr, unsigned len)
+ void *daddr, void *saddr, unsigned len)
{
struct trh_hdr *trh;
int hdr_len;
- /*
- * Add the 802.2 SNAP header if IP as the IPv4/IPv6 code calls
+ /*
+ * Add the 802.2 SNAP header if IP as the IPv4/IPv6 code calls
* dev->hard_header directly.
*/
if (type == ETH_P_IP || type == ETH_P_IPV6 || type == ETH_P_ARP)
else
{
hdr_len = sizeof(struct trh_hdr);
- trh = (struct trh_hdr *)skb_push(skb, hdr_len);
+ trh = (struct trh_hdr *)skb_push(skb, hdr_len);
}
trh->ac=AC;
/*
* Build the destination and then source route the frame
*/
-
- if(daddr)
+
+ if(daddr)
{
memcpy(trh->daddr,daddr,dev->addr_len);
tr_source_route(skb,trh,dev);
return -hdr_len;
}
-
+
/*
* A neighbour discovery of some species (eg arp) has completed. We
* can now send the packet.
*/
-
-static int tr_rebuild_header(struct sk_buff *skb)
+
+static int tr_rebuild_header(struct sk_buff *skb)
{
struct trh_hdr *trh=(struct trh_hdr *)skb->data;
struct trllc *trllc=(struct trllc *)(skb->data+sizeof(struct trh_hdr));
/*
* FIXME: We don't yet support IPv6 over token rings
*/
-
+
if(trllc->ethertype != htons(ETH_P_IP)) {
printk("tr_rebuild_header: Don't know how to resolve type %04X addresses ?\n", ntohs(trllc->ethertype));
return 0;
if(arp_find(trh->daddr, skb)) {
return 1;
}
- else
-#endif
- {
- tr_source_route(skb,trh,dev);
+ else
+#endif
+ {
+ tr_source_route(skb,trh,dev);
return 0;
}
}
-
+
/*
* Some of this is a bit hackish. We intercept RIF information
* used for source routing. We also grab IP directly and don't feed
* it via SNAP.
*/
-
+
__be16 tr_type_trans(struct sk_buff *skb, struct net_device *dev)
{
struct trh_hdr *trh=(struct trh_hdr *)skb->data;
struct trllc *trllc;
unsigned riflen=0;
-
+
skb->mac.raw = skb->data;
-
- if(trh->saddr[0] & TR_RII)
+
+ if(trh->saddr[0] & TR_RII)
riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
trllc = (struct trllc *)(skb->data+sizeof(struct trh_hdr)-TR_MAXRIFLEN+riflen);
skb_pull(skb,sizeof(struct trh_hdr)-TR_MAXRIFLEN+riflen);
- if(*trh->daddr & 0x80)
+ if(*trh->daddr & 0x80)
{
- if(!memcmp(trh->daddr,dev->broadcast,TR_ALEN))
+ if(!memcmp(trh->daddr,dev->broadcast,TR_ALEN))
skb->pkt_type=PACKET_BROADCAST;
else
skb->pkt_type=PACKET_MULTICAST;
{
skb->pkt_type=PACKET_MULTICAST;
}
- else if(dev->flags & IFF_PROMISC)
+ else if(dev->flags & IFF_PROMISC)
{
if(memcmp(trh->daddr, dev->dev_addr, TR_ALEN))
skb->pkt_type=PACKET_OTHERHOST;
if ((skb->pkt_type != PACKET_BROADCAST) &&
(skb->pkt_type != PACKET_MULTICAST))
- tr_add_rif_info(trh,dev) ;
+ tr_add_rif_info(trh,dev) ;
/*
- * Strip the SNAP header from ARP packets since we don't
+ * Strip the SNAP header from ARP packets since we don't
* pass them through to the 802.2/SNAP layers.
*/
}
/*
- * We try to do source routing...
+ * We try to do source routing...
*/
-void tr_source_route(struct sk_buff *skb,struct trh_hdr *trh,struct net_device *dev)
+void tr_source_route(struct sk_buff *skb,struct trh_hdr *trh,struct net_device *dev)
{
int slack;
unsigned int hash;
struct rif_cache *entry;
unsigned char *olddata;
unsigned long flags;
- static const unsigned char mcast_func_addr[]
+ static const unsigned char mcast_func_addr[]
= {0xC0,0x00,0x00,0x04,0x00,0x00};
-
+
spin_lock_irqsave(&rif_lock, flags);
/*
- * Broadcasts are single route as stated in RFC 1042
+ * Broadcasts are single route as stated in RFC 1042
*/
if( (!memcmp(&(trh->daddr[0]),&(dev->broadcast[0]),TR_ALEN)) ||
(!memcmp(&(trh->daddr[0]),&(mcast_func_addr[0]), TR_ALEN)) )
{
- trh->rcf=htons((((sizeof(trh->rcf)) << 8) & TR_RCF_LEN_MASK)
+ trh->rcf=htons((((sizeof(trh->rcf)) << 8) & TR_RCF_LEN_MASK)
| TR_RCF_FRAME2K | TR_RCF_LIMITED_BROADCAST);
trh->saddr[0]|=TR_RII;
}
- else
+ else
{
hash = rif_hash(trh->daddr);
/*
/*
* If we found an entry we can route the frame.
*/
- if(entry)
+ if(entry)
{
#if TR_SR_DEBUG
printk("source routing for %02X:%02X:%02X:%02X:%02X:%02X\n",trh->daddr[0],
{
trh->rcf=entry->rcf;
memcpy(&trh->rseg[0],&entry->rseg[0],8*sizeof(unsigned short));
- trh->rcf^=htons(TR_RCF_DIR_BIT);
+ trh->rcf^=htons(TR_RCF_DIR_BIT);
trh->rcf&=htons(0x1fff); /* Issam Chehab <ichehab@madge1.demon.co.uk> */
trh->saddr[0]|=TR_RII;
}
entry->last_used=jiffies;
}
- else
+ else
{
/*
* Without the information we simply have to shout
* on the wire. The replies should rapidly clean this
* situation up.
*/
- trh->rcf=htons((((sizeof(trh->rcf)) << 8) & TR_RCF_LEN_MASK)
+ trh->rcf=htons((((sizeof(trh->rcf)) << 8) & TR_RCF_LEN_MASK)
| TR_RCF_FRAME2K | TR_RCF_LIMITED_BROADCAST);
trh->saddr[0]|=TR_RII;
#if TR_SR_DEBUG
/* Compress the RIF here so we don't have to do it in the driver(s) */
if (!(trh->saddr[0] & 0x80))
slack = 18;
- else
+ else
slack = 18 - ((ntohs(trh->rcf) & TR_RCF_LEN_MASK)>>8);
olddata = skb->data;
spin_unlock_irqrestore(&rif_lock, flags);
* We have learned some new RIF information for our source
* routing.
*/
-
+
static void tr_add_rif_info(struct trh_hdr *trh, struct net_device *dev)
{
unsigned int hash, rii_p = 0;
spin_lock_irqsave(&rif_lock, flags);
saddr0 = trh->saddr[0];
-
+
/*
* Firstly see if the entry exists
*/
- if(trh->saddr[0] & TR_RII)
+ if(trh->saddr[0] & TR_RII)
{
trh->saddr[0]&=0x7f;
if (((ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8) > 2)
{
rii_p = 1;
- }
+ }
}
hash = rif_hash(trh->saddr);
for(entry=rif_table[hash];entry && memcmp(&(entry->addr[0]),&(trh->saddr[0]),TR_ALEN);entry=entry->next);
- if(entry==NULL)
+ if(entry==NULL)
{
#if TR_SR_DEBUG
printk("adding rif_entry: addr:%02X:%02X:%02X:%02X:%02X:%02X rcf:%04X\n",
trh->saddr[0],trh->saddr[1],trh->saddr[2],
- trh->saddr[3],trh->saddr[4],trh->saddr[5],
+ trh->saddr[3],trh->saddr[4],trh->saddr[5],
ntohs(trh->rcf));
#endif
/*
*/
entry=kmalloc(sizeof(struct rif_cache),GFP_ATOMIC);
- if(!entry)
+ if(!entry)
{
printk(KERN_DEBUG "tr.c: Couldn't malloc rif cache entry !\n");
spin_unlock_irqrestore(&rif_lock, flags);
{
entry->local_ring = 1;
}
- }
+ }
else /* Y. Tahara added */
- {
+ {
/*
* Update existing entries
*/
- if (!entry->local_ring)
+ if (!entry->local_ring)
if (entry->rcf != (trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK)) &&
!(trh->rcf & htons(TR_RCF_BROADCAST_MASK)))
{
ntohs(trh->rcf));
#endif
entry->rcf = trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK);
- memcpy(&(entry->rseg[0]),&(trh->rseg[0]),8*sizeof(unsigned short));
- }
- entry->last_used=jiffies;
+ memcpy(&(entry->rseg[0]),&(trh->rseg[0]),8*sizeof(unsigned short));
+ }
+ entry->last_used=jiffies;
}
trh->saddr[0]=saddr0; /* put the routing indicator back for tcpdump */
spin_unlock_irqrestore(&rif_lock, flags);
* Scan the cache with a timer and see what we need to throw out.
*/
-static void rif_check_expire(unsigned long dummy)
+static void rif_check_expire(unsigned long dummy)
{
int i;
unsigned long flags, next_interval = jiffies + sysctl_tr_rif_timeout/2;
spin_lock_irqsave(&rif_lock, flags);
-
+
for(i =0; i < RIF_TABLE_SIZE; i++) {
struct rif_cache *entry, **pentry;
-
+
pentry = rif_table+i;
while((entry=*pentry) != NULL) {
unsigned long expires
}
}
}
-
+
spin_unlock_irqrestore(&rif_lock, flags);
mod_timer(&rif_timer, next_interval);
* Generate the /proc/net information for the token ring RIF
* routing.
*/
-
+
#ifdef CONFIG_PROC_FS
static struct rif_cache *rif_get_idx(loff_t pos)
struct rif_cache *entry;
loff_t off = 0;
- for(i = 0; i < RIF_TABLE_SIZE; i++)
+ for(i = 0; i < RIF_TABLE_SIZE; i++)
for(entry = rif_table[i]; entry; entry = entry->next) {
if (off == pos)
return entry;
goto scan;
}
- if (ent->next)
+ if (ent->next)
return ent->next;
i = rif_hash(ent->addr);
ttl/HZ);
if (entry->local_ring)
- seq_puts(seq, "local\n");
+ seq_puts(seq, "local\n");
else {
seq_printf(seq, "%04X", ntohs(entry->rcf));
- rcf_len = ((ntohs(entry->rcf) & TR_RCF_LEN_MASK)>>8)-2;
+ rcf_len = ((ntohs(entry->rcf) & TR_RCF_LEN_MASK)>>8)-2;
if (rcf_len)
- rcf_len >>= 1;
+ rcf_len >>= 1;
for(j = 1; j < rcf_len; j++) {
if(j==1) {
segment=ntohs(entry->rseg[j-1])>>4;
}
seq_putc(seq, '\n');
}
- }
+ }
return 0;
}
/*
* Configure and register
*/
-
+
dev->hard_header = tr_header;
dev->rebuild_header = tr_rebuild_header;
dev->mtu = 2000;
dev->addr_len = TR_ALEN;
dev->tx_queue_len = 100; /* Long queues on tr */
-
+
memset(dev->broadcast,0xFF, TR_ALEN);
/* New-style flags. */
projects / linux-drm-fsl-dcu.git / blobdiff