diff options
| -rw-r--r-- | net/atm/br2684.c | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/net/atm/br2684.c b/net/atm/br2684.c index c742d37..ba6428f 100644 --- a/net/atm/br2684.c +++ b/net/atm/br2684.c @@ -24,16 +24,6 @@ Author: Marcell GAL, 2000, XDSL Ltd, Hungary #include "common.h" -/* - * Define this to use a version of the code which interacts with the higher - * layers in a more intellegent way, by always reserving enough space for - * our header at the begining of the packet. However, there may still be - * some problems with programs like tcpdump. In 2.5 we'll sort out what - * we need to do to get this perfect. For now we just will copy the packet - * if we need space for the header - */ -/* #define FASTER_VERSION */ - #ifdef SKB_DEBUG static void skb_debug(const struct sk_buff *skb) { @@ -69,9 +59,7 @@ struct br2684_vcc { #ifdef CONFIG_ATM_BR2684_IPFILTER struct br2684_filter filter; #endif /* CONFIG_ATM_BR2684_IPFILTER */ -#ifndef FASTER_VERSION unsigned copies_needed, copies_failed; -#endif /* FASTER_VERSION */ }; struct br2684_dev { @@ -147,13 +135,6 @@ static int br2684_xmit_vcc(struct sk_buff *skb, struct br2684_dev *brdev, struct br2684_vcc *brvcc) { struct atm_vcc *atmvcc; -#ifdef FASTER_VERSION - if (brvcc->encaps == e_llc) - memcpy(skb_push(skb, 8), llc_oui_pid_pad, 8); - /* last 2 bytes of llc_oui_pid_pad are managed by header routines; - yes, you got it: 8 + 2 = sizeof(llc_oui_pid_pad) - */ -#else int minheadroom = (brvcc->encaps == e_llc) ? 10 : 2; if (skb_headroom(skb) < minheadroom) { struct sk_buff *skb2 = skb_realloc_headroom(skb, minheadroom); @@ -170,7 +151,6 @@ static int br2684_xmit_vcc(struct sk_buff *skb, struct br2684_dev *brdev, skb_copy_to_linear_data(skb, llc_oui_pid_pad, 10); else memset(skb->data, 0, 2); -#endif /* FASTER_VERSION */ skb_debug(skb); ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc; @@ -237,87 +217,6 @@ static struct net_device_stats *br2684_get_stats(struct net_device *dev) return &BRPRIV(dev)->stats; } -#ifdef FASTER_VERSION -/* - * These mirror eth_header and eth_header_cache. They are not usually - * exported for use in modules, so we grab them from net_device - * after ether_setup() is done with it. Bit of a hack. - */ -static int (*my_eth_header)(struct sk_buff *, struct net_device *, - unsigned short, void *, void *, unsigned); -static int (*my_eth_header_cache)(struct neighbour *, struct hh_cache *); - -static int -br2684_header(struct sk_buff *skb, struct net_device *dev, - unsigned short type, void *daddr, void *saddr, unsigned len) -{ - u16 *pad_before_eth; - int t = my_eth_header(skb, dev, type, daddr, saddr, len); - if (t > 0) { - pad_before_eth = (u16 *) skb_push(skb, 2); - *pad_before_eth = 0; - return dev->hard_header_len; /* or return 16; ? */ - } else - return t; -} - -static int -br2684_header_cache(struct neighbour *neigh, struct hh_cache *hh) -{ -/* hh_data is 16 bytes long. if encaps is ether-llc we need 24, so -xmit will add the additional header part in that case */ - u16 *pad_before_eth = (u16 *)(hh->hh_data); - int t = my_eth_header_cache(neigh, hh); - DPRINTK("br2684_header_cache, neigh=%p, hh_cache=%p\n", neigh, hh); - if (t < 0) - return t; - else { - *pad_before_eth = 0; - hh->hh_len = PADLEN + ETH_HLEN; - } - return 0; -} - -/* - * This is similar to eth_type_trans, which cannot be used because of - * our dev->hard_header_len - */ -static inline __be16 br_type_trans(struct sk_buff *skb, struct net_device *dev) -{ - struct ethhdr *eth; - unsigned char *rawp; - eth = eth_hdr(skb); - - if (is_multicast_ether_addr(eth->h_dest)) { - if (!compare_ether_addr(eth->h_dest, dev->broadcast)) - skb->pkt_type = PACKET_BROADCAST; - else - skb->pkt_type = PACKET_MULTICAST; - } - - else if (compare_ether_addr(eth->h_dest, dev->dev_addr)) - skb->pkt_type = PACKET_OTHERHOST; - - if (ntohs(eth->h_proto) >= 1536) - return eth->h_proto; - - rawp = skb->data; - - /* - * This is a magic hack to spot IPX packets. Older Novell breaks - * the protocol design and runs IPX over 802.3 without an 802.2 LLC - * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This - * won't work for fault tolerant netware but does for the rest. - */ - if (*(unsigned short *) rawp == 0xFFFF) - return htons(ETH_P_802_3); - - /* - * Real 802.2 LLC - */ - return htons(ETH_P_802_2); -} -#endif /* FASTER_VERSION */ /* * We remember when the MAC gets set, so we don't override it later with @@ -448,17 +347,8 @@ static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb) return; } -#ifdef FASTER_VERSION - /* FIXME: tcpdump shows that pointer to mac header is 2 bytes earlier, - than should be. What else should I set? */ - skb_pull(skb, plen); - skb_set_mac_header(skb, -ETH_HLEN); - skb->pkt_type = PACKET_HOST; - skb->protocol = br_type_trans(skb, net_dev); -#else skb_pull(skb, plen - ETH_HLEN); skb->protocol = eth_type_trans(skb, net_dev); -#endif /* FASTER_VERSION */ #ifdef CONFIG_ATM_BR2684_IPFILTER if (unlikely(packet_fails_filter(skb->protocol, brvcc, skb))) { brdev->stats.rx_dropped++; @@ -584,13 +474,6 @@ static void br2684_setup(struct net_device *netdev) ether_setup(netdev); brdev->net_dev = netdev; -#ifdef FASTER_VERSION - my_eth_header = netdev->hard_header; - netdev->hard_header = br2684_header; - my_eth_header_cache = netdev->hard_header_cache; - netdev->hard_header_cache = br2684_header_cache; - netdev->hard_header_len = sizeof(llc_oui_pid_pad) + ETH_HLEN; /* 10 + 14 */ -#endif my_eth_mac_addr = netdev->set_mac_address; netdev->set_mac_address = br2684_mac_addr; netdev->hard_start_xmit = br2684_start_xmit; @@ -719,16 +602,12 @@ static int br2684_seq_show(struct seq_file *seq, void *v) list_for_each_entry(brvcc, &brdev->brvccs, brvccs) { seq_printf(seq, " vcc %d.%d.%d: encaps=%s" -#ifndef FASTER_VERSION ", failed copies %u/%u" -#endif /* FASTER_VERSION */ "\n", brvcc->atmvcc->dev->number, brvcc->atmvcc->vpi, brvcc->atmvcc->vci, (brvcc->encaps == e_llc) ? "LLC" : "VC" -#ifndef FASTER_VERSION , brvcc->copies_failed , brvcc->copies_needed -#endif /* FASTER_VERSION */ ); #ifdef CONFIG_ATM_BR2684_IPFILTER #define b1(var, byte) ((u8 *) &brvcc->filter.var)[byte] |
