马克-to-win，子类把父类的方法和属性当成自己的一样随便用的这种现象叫继承。In OOP, the ability t...
n->ip_summed = skb->ip_summed;if(skb_copy_bits(skb, -headerlen, n->head, headerlen + skb->len))BUG();copy_skb_header(n, skb);returnn; }
The 'ip_summed' field describes what kind of checksumming assistence the card has provided for a receive packet. It takes on one of three values: 'CHECKSUM_NONE' if the card provided no checksum assistence, 'CHECKSUM_HW' if the two's complement checksum over the entire packet has been p...
> +++ b/net/netfilter/ipvs/ip_vs_proto_sctp.c > @@ -126,7 +126,7 @@ sctp_snat_handler(struct sk_buff *skb, struct > ip_vs_protocol *pp, > if (sctph->source != cp->vport || payload_csum || > skb->ip_summed == CHECKSUM_PARTIAL) { > sctph->source = cp->vport; >...
"gso_type=%d ip_summed=%d\n", driver, dev ? &dev->features : &null_features, skb->sk ? &skb->sk->sk_route_caps : &null_features, skb->len, skb->data_len, skb_shinfo(skb)->gso_size, skb_shinfo(skb)->gso_type, skb->ip_summed); ...
skb->protocol=eth_type_trans(skb,dev); skb->ip_summed=CHECKSUM_UNNECESSARY;/* don't check it */ priv->stats.rx_packets++; priv->stats.rx_bytes+=pkt->datalen; netif_rx(skb); 注意:上面代码中红色放大的地方是重要的。 因为此刻收到的数据包的格式如下:mac+ip+udp/udp+data ...
if (skb->ip_summed == CHECKSUM_COMPLETE) { skb_postpull_rcsum(skb, skb_network_header(skb), - skb->h.raw - skb->nh.raw); + skb_network_header_len(skb)); if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, ...
voidskb_copy_and_csum_dev(const structsk_buff*skb,u8*to)1825{1826__wsumcsum;1827long csstart;18281829if (skb->ip_summed ==CHECKSUM_PARTIAL)1830csstart =skb->csum_start -skb_headroom(skb);1831else1832csstart =skb_headlen(skb);18331834BUG_ON(csstart >skb_headlen(skb));18351836skb_copy_...
Raw kernel: ---[ cut here ]--- kernel: WARNING: CPU: 3 PID: 2696 at net/core/dev.c:2496 skb_warn_bad_offload+0xcd/0xda kernel: : caps=(0x0000362007db58e9, 0x0000000000000000) len=2342 data_len=2214 gso_size=1398 gso_type=5 ip_summed=1 kernel: Modules linked in: nfsv3 two...
15skb->ip_summed = CHECKSUM_UNNECESSARY;/* don't check it */ 16priv->stats.rx_packets++; 17priv->stats.rx_bytes += pkt->datalen; 18netif_rx(skb); 此刻收到的数据包的格式如下:mac+ip+udp/udp+data 这时候的处理就是剥离mac头,然后需要更新的一些域值。这些都是在函数eth_type_trans函数...