Messages in this thread Patch in this message | | | Date | Sat, 10 Apr 2004 15:33:02 -0500 | From | Matt Mackall <> | Subject | [PATCH] netpoll early ARP handling |
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Handle ARP requests while device is trapped before in_dev is initialized using netpoll config. Allows early kgdboe usage.
From Stelian Pop <stelian@popies.net>
%patch Index: mm/net/core/netpoll.c =================================================================== --- mm.orig/net/core/netpoll.c 2004-04-10 15:06:57.000000000 -0500 +++ mm/net/core/netpoll.c 2004-04-10 15:15:25.000000000 -0500 @@ -231,9 +231,8 @@ static void arp_reply(struct sk_buff *skb) { - struct in_device *in_dev = (struct in_device *) skb->dev->ip_ptr; struct arphdr *arp; - unsigned char *arp_ptr, *sha, *tha; + unsigned char *arp_ptr; int size, type = ARPOP_REPLY, ptype = ETH_P_ARP; u32 sip, tip; struct sk_buff *send_skb; @@ -253,7 +252,7 @@ if (!np) return; /* No arp on this interface */ - if (!in_dev || skb->dev->flags & IFF_NOARP) + if (skb->dev->flags & IFF_NOARP) return; if (!pskb_may_pull(skb, (sizeof(struct arphdr) + @@ -270,21 +269,15 @@ arp->ar_op != htons(ARPOP_REQUEST)) return; - arp_ptr= (unsigned char *)(arp+1); - sha = arp_ptr; - arp_ptr += skb->dev->addr_len; + arp_ptr = (unsigned char *)(arp+1) + skb->dev->addr_len; memcpy(&sip, arp_ptr, 4); - arp_ptr += 4; - tha = arp_ptr; - arp_ptr += skb->dev->addr_len; + arp_ptr += 4 + skb->dev->addr_len; memcpy(&tip, arp_ptr, 4); /* Should we ignore arp? */ - if (tip != in_dev->ifa_list->ifa_address || - LOOPBACK(tip) || MULTICAST(tip)) + if (tip != htonl(np->local_ip) || LOOPBACK(tip) || MULTICAST(tip)) return; - size = sizeof(struct arphdr) + 2 * (skb->dev->addr_len + 4); send_skb = find_skb(np, size + LL_RESERVED_SPACE(np->dev), LL_RESERVED_SPACE(np->dev)); @@ -325,7 +318,7 @@ arp_ptr += np->dev->addr_len; memcpy(arp_ptr, &tip, 4); arp_ptr += 4; - memcpy(arp_ptr, np->local_mac, np->dev->addr_len); + memcpy(arp_ptr, np->remote_mac, np->dev->addr_len); arp_ptr += np->dev->addr_len; memcpy(arp_ptr, &sip, 4); %diffstat netpoll.c | 19 ++++++------------- 1 files changed, 6 insertions(+), 13 deletions(-)
-- Matt Mackall : http://www.selenic.com : Linux development and consulting - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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