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...
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...
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...
n->ip_summed = skb->ip_summed;if(skb_copy_bits(skb, -headerlen, n->head, headerlen + skb->len))BUG();copy_skb_header(n, skb);returnn; }
if (skb->ip_summed == CHECKSUM_NONE) {// 表示检验ip包的校验 int err = 0; // 数据拷贝操作,这里调用了skb_put()函数让tail往下移空出控件来存放将要拷贝的数据,并且返回tail指针 __wsum csum = csum_and_copy_from_user(from, skb_put(skb, copy), ...
len,data_len,mac_len,csum;__u32 priority;__u8 local_df:1,cloned:1,ip_summed:2,nohdr:1,nfctinfo:3;__u8 pkt_type:3,
"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_is_gso(skb)) > sctp_nat_csum(skb, sctph, sctphoff); > } else if (skb->ip_summed != CHECKSUM_PARTIAL) { > skb->ip_summed = CHECKSUM_UNNECESSARY; > -- > 2.44.0 Regards -- Julian Anastasov <j...@ssi.bg>...
skb_reserve(skb, ETH_HLEN+ip_header_len+udp_header_len);//adjust headroom/*allocate space to data and write it*/data=skb_put(skb,udp_payload_len); memcpy(data, hello_world, data_len);/*UDP header*/structudphdr* uh = (structudphdr*)skb_push(skb,udp_header_len); ...