skb_dst_drop(skb);skb_dst_set(skb, &rt_dst(rt));#if0/* Do not clear ovs_skb_cb. It will be done in gso code. */memset(IPCB(skb),0,sizeof(*IPCB(skb)));#endif/* Push down and install the IP header. */__skb_push(skb,sizeof(struct iphdr)); skb_reset_network_header(s...
So if we are receiving a packet from a device which is part of a bonding device instance, initially 'skb->dev' will be set to point the real underlying bonding slave. When the packet enters the networking (via 'netif_receive_skb()') we save 'skb->dev' away in 'skb->real_dev' an...
skb_dst_set(skb, dst_clone(&rt->dst)); IP6_UPD_PO_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);if(proto == IPPROTO_ICMPV6) {structinet6_dev*idev=ip6_dst_idev(skb_dst(skb));ICMP6MSGOUT_INC_STATS_BH(net, idev, icmp6_hdr(skb)->icmp6_type); ICMP6_INC_STAT...
So if we are receiving a packet from a device which is part of a bonding device instance, initially 'skb->dev' will be set to point the real underlying bonding slave. When the packet enters the networking (via 'netif_receive_skb()') we save 'skb->dev' away in 'skb->real_dev' an...
函数原型:static inline struct dst_entry *skb_dst(const struct sk_buff *skb) 返回类型:struct dst_entry 参数: 类型参数名称 const struct sk_buff * skb 925 WARN_ON((_skb_refdst & skb might have a dst pointer attached, refcounted or not.* _skb_refdst low order bit is set if refcount...
void *dst, int len, __wsum sum, int *err_ptr) { if (copy_from_user(dst, src, len)) { // 拷贝操作 *err_ptr = -EFAULT; return (__force __wsum)-1; } return csum_partial(dst, len, sum); // 设置校验和 } // 这是调用memcpy()函数来对数据进行拷贝,to是tail指针,from是将要插...
skb_dst(skb)->dev,dst_output); } 可以看到,该函数首先做了两件重要的事情: 设置IP 数据包的长度 调用ip_send_check 来计算要写入 IP 头的校验和。 ip_send_check 函数将进一步调用名为 ip_fast_csum 的函数来计算校验和。在 x86 和 x86_64 体系结构上,此函数用汇编实 现。
前言Linux内核网络 UDP 协议层通过调用 ip_send_skb 将skb 交给IP 协议层,本文通过分析内核 IP 协议层的关键函数来分享内核数据包发送在 IP 协议层的处理,并分享了监控...struct net_device *dev = skb_dst(skb)->dev; IP_UPD_PO_STATS(dev_net(dev), IPSTATS_MIB_OUT, skb...以上两种情况,最后都会...
struct dst_entry *dst;struct sec_path *sp;char cb[40];unsigned int len,data_len,mac_len,csum;__u32 priority;__u8 local_df:1,cloned:1,ip_summed:2,nohdr:1,nfctinfo:3;__u8
Expand Up @@ -1063,7 +1063,8 @@ int prism2_sta_send_mgmt(local_info_t *local, u8 *dst, u16 stype, meta->iface = netdev_priv(dev); skb->dev = dev; skb->mac.raw = skb->nh.raw = skb->data; skb_reset_mac_header(skb); skb->nh.raw = skb->data; dev_queue_xmit(skb)...