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Date: Mon, 16 Jun 2008 13:27:41 -0400
From: "chas williams - CONTRACTOR" <chas@....nrl.navy.mil>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net
Subject: [PATCH net-2.6 5/7] atm: [br2864] fix routed vcmux support
commit 1390b21d5244dc3a8a929778ffd2fde05613c761
Author: Eric Kinzie <ekinzie@....nrl.navy.mil>
Date: Sat Jun 14 17:33:35 2008 -0400
atm: [br2864] fix routed vcmux support
From: Eric Kinzie <ekinzie@....nrl.navy.mil>
Signed-off-by: Chas Williams <chas@....nrl.navy.mil>
diff --git a/net/atm/br2684.c b/net/atm/br2684.c
index ac60350..05fafdc 100644
--- a/net/atm/br2684.c
+++ b/net/atm/br2684.c
@@ -188,10 +188,13 @@ static int br2684_xmit_vcc(struct sk_buff *skb, struct br2684_dev *brdev,
return 0;
}
}
- } else {
- skb_push(skb, 2);
- if (brdev->payload == p_bridged)
+ } else { /* e_vc */
+ if (brdev->payload == p_bridged) {
+ skb_push(skb, 2);
memset(skb->data, 0, 2);
+ } else { /* p_routed */
+ skb_pull(skb, ETH_HLEN);
+ }
}
skb_debug(skb);
@@ -377,11 +380,8 @@ static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb)
(skb->data + 6, ethertype_ipv4,
sizeof(ethertype_ipv4)) == 0)
skb->protocol = __constant_htons(ETH_P_IP);
- else {
- brdev->stats.rx_errors++;
- dev_kfree_skb(skb);
- return;
- }
+ else
+ goto error;
skb_pull(skb, sizeof(llc_oui_ipv4));
skb_reset_network_header(skb);
skb->pkt_type = PACKET_HOST;
@@ -394,44 +394,56 @@ static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb)
(memcmp(skb->data, llc_oui_pid_pad, 7) == 0)) {
skb_pull(skb, sizeof(llc_oui_pid_pad));
skb->protocol = eth_type_trans(skb, net_dev);
- } else {
- brdev->stats.rx_errors++;
- dev_kfree_skb(skb);
- return;
- }
+ } else
+ goto error;
- } else {
- /* first 2 chars should be 0 */
- if (*((u16 *) (skb->data)) != 0) {
- brdev->stats.rx_errors++;
- dev_kfree_skb(skb);
- return;
+ } else { /* e_vc */
+ if (brdev->payload == p_routed) {
+ struct iphdr *iph;
+
+ skb_reset_network_header(skb);
+ iph = ip_hdr(skb);
+ if (iph->version == 4)
+ skb->protocol = __constant_htons(ETH_P_IP);
+ else if (iph->version == 6)
+ skb->protocol = __constant_htons(ETH_P_IPV6);
+ else
+ goto error;
+ skb->pkt_type = PACKET_HOST;
+ } else { /* p_bridged */
+ /* first 2 chars should be 0 */
+ if (*((u16 *) (skb->data)) != 0)
+ goto error;
+ skb_pull(skb, BR2684_PAD_LEN);
+ skb->protocol = eth_type_trans(skb, net_dev);
}
- skb_pull(skb, BR2684_PAD_LEN + ETH_HLEN); /* pad, dstmac, srcmac, ethtype */
- skb->protocol = eth_type_trans(skb, net_dev);
}
#ifdef CONFIG_ATM_BR2684_IPFILTER
- if (unlikely(packet_fails_filter(skb->protocol, brvcc, skb))) {
- brdev->stats.rx_dropped++;
- dev_kfree_skb(skb);
- return;
- }
+ if (unlikely(packet_fails_filter(skb->protocol, brvcc, skb)))
+ goto dropped;
#endif /* CONFIG_ATM_BR2684_IPFILTER */
skb->dev = net_dev;
ATM_SKB(skb)->vcc = atmvcc; /* needed ? */
pr_debug("received packet's protocol: %x\n", ntohs(skb->protocol));
skb_debug(skb);
- if (unlikely(!(net_dev->flags & IFF_UP))) {
- /* sigh, interface is down */
- brdev->stats.rx_dropped++;
- dev_kfree_skb(skb);
- return;
- }
+ /* sigh, interface is down? */
+ if (unlikely(!(net_dev->flags & IFF_UP)))
+ goto dropped;
brdev->stats.rx_packets++;
brdev->stats.rx_bytes += skb->len;
memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
netif_rx(skb);
+ return;
+
+dropped:
+ brdev->stats.rx_dropped++;
+ goto free_skb;
+error:
+ brdev->stats.rx_errors++;
+free_skb:
+ dev_kfree_skb(skb);
+ return;
}
/*
--
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