Fix compile error for udp header parse

diff --git a/jme.c b/jme.c
index 351fb3b384eb591119585b6e3a79022c0a2b735c..4e4613a3dc2ffd80c765ee3d13d56dcc78cda5fd 100644 (file)
--- a/jme.c
+++ b/jme.c
@@ -979,11 +979,29 @@ static u16
 jme_udpsum(struct sk_buff *skb)
 {
        u16 csum = 0xFFFFu;
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,21)
+       struct iphdr *iph;
+       int iphlen;
+       struct udphdr *udph;
+#endif
 
        if (skb->len < (ETH_HLEN + sizeof(struct iphdr)))
                return csum;
        if (skb->protocol != htons(ETH_P_IP))
                return csum;
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,21)
+       iph = (struct iphdr *)skb_pull(skb, ETH_HLEN);
+       iphlen = (iph->ihl << 2);
+       if ((iph->protocol != IPPROTO_UDP) ||
+           (skb->len < (iphlen + sizeof(struct udphdr)))) {
+               skb_push(skb, ETH_HLEN);
+               return csum;
+       }
+       udph = (struct udphdr *)skb_pull(skb, iphlen);
+       csum = udph->check;
+       skb_push(skb, iphlen);
+       skb_push(skb, ETH_HLEN);
+#else
        skb_set_network_header(skb, ETH_HLEN);
        if ((ip_hdr(skb)->protocol != IPPROTO_UDP) ||
            (skb->len < (ETH_HLEN +
@@ -997,6 +1015,7 @@ jme_udpsum(struct sk_buff *skb)
        csum = udp_hdr(skb)->check;
        skb_reset_transport_header(skb);
        skb_reset_network_header(skb);
+#endif
 
        return csum;
 }