diff options
Diffstat (limited to 'net/802/tr.c')
| -rw-r--r-- | net/802/tr.c | 136 |
1 files changed, 68 insertions, 68 deletions
diff --git a/net/802/tr.c b/net/802/tr.c index 829deb41ce8..31509f61340 100644 --- a/net/802/tr.c +++ b/net/802/tr.c @@ -1,6 +1,6 @@ /* * 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 @@ -12,7 +12,7 @@ * 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> @@ -45,7 +45,7 @@ static void rif_check_expire(unsigned long dummy); /* * Each RIF entry we learn is kept this way */ - + struct rif_cache { unsigned char addr[TR_ALEN]; int iface; @@ -62,7 +62,7 @@ struct rif_cache { * 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); @@ -71,7 +71,7 @@ static DEFINE_SPINLOCK(rif_lock); /* * Garbage disposal timer. */ - + static struct timer_list rif_timer; int sysctl_tr_rif_timeout = 60*10*HZ; @@ -96,16 +96,16 @@ static inline unsigned long rif_hash(const unsigned char *addr) * 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) @@ -123,7 +123,7 @@ static int tr_header(struct sk_buff *skb, struct net_device *dev, 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; @@ -137,8 +137,8 @@ static int tr_header(struct sk_buff *skb, struct net_device *dev, /* * 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); @@ -147,13 +147,13 @@ static int tr_header(struct sk_buff *skb, struct net_device *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)); @@ -162,7 +162,7 @@ static int tr_rebuild_header(struct sk_buff *skb) /* * 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; @@ -172,39 +172,39 @@ static int tr_rebuild_header(struct sk_buff *skb) 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; @@ -213,7 +213,7 @@ __be16 tr_type_trans(struct sk_buff *skb, struct net_device *dev) { 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; @@ -221,10 +221,10 @@ __be16 tr_type_trans(struct sk_buff *skb, struct net_device *dev) 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. */ @@ -241,32 +241,32 @@ __be16 tr_type_trans(struct sk_buff *skb, struct net_device *dev) } /* - * 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); /* @@ -277,7 +277,7 @@ void tr_source_route(struct sk_buff *skb,struct trh_hdr *trh,struct net_device * /* * 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], @@ -287,7 +287,7 @@ 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; @@ -301,14 +301,14 @@ printk("source routing for %02X:%02X:%02X:%02X:%02X:%02X\n",trh->daddr[0], } 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 @@ -320,7 +320,7 @@ printk("source routing for %02X:%02X:%02X:%02X:%02X:%02X\n",trh->daddr[0], /* 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); @@ -333,7 +333,7 @@ printk("source routing for %02X:%02X:%02X:%02X:%02X:%02X\n",trh->daddr[0], * 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; @@ -343,29 +343,29 @@ static void tr_add_rif_info(struct trh_hdr *trh, struct net_device *dev) 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 /* @@ -377,7 +377,7 @@ printk("adding rif_entry: addr:%02X:%02X:%02X:%02X:%02X:%02X rcf:%04X\n", */ 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); @@ -400,13 +400,13 @@ printk("adding rif_entry: addr:%02X:%02X:%02X:%02X:%02X:%02X rcf:%04X\n", { 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))) { @@ -417,9 +417,9 @@ printk("updating rif_entry: addr:%02X:%02X:%02X:%02X:%02X:%02X rcf:%04X\n", 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); @@ -429,16 +429,16 @@ printk("updating rif_entry: addr:%02X:%02X:%02X:%02X:%02X:%02X rcf:%04X\n", * 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 @@ -455,7 +455,7 @@ static void rif_check_expire(unsigned long dummy) } } } - + spin_unlock_irqrestore(&rif_lock, flags); mod_timer(&rif_timer, next_interval); @@ -466,7 +466,7 @@ static void rif_check_expire(unsigned long dummy) * 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) @@ -475,7 +475,7 @@ 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; @@ -504,7 +504,7 @@ static void *rif_seq_next(struct seq_file *seq, void *v, loff_t *pos) goto scan; } - if (ent->next) + if (ent->next) return ent->next; i = rif_hash(ent->addr); @@ -541,13 +541,13 @@ static int rif_seq_show(struct seq_file *seq, void *v) 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; @@ -559,7 +559,7 @@ static int rif_seq_show(struct seq_file *seq, void *v) } seq_putc(seq, '\n'); } - } + } return 0; } @@ -591,7 +591,7 @@ static void tr_setup(struct net_device *dev) /* * Configure and register */ - + dev->hard_header = tr_header; dev->rebuild_header = tr_rebuild_header; @@ -600,7 +600,7 @@ static void tr_setup(struct net_device *dev) 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. */ |