函数名称:skb_dst - returns skb dst_entry*@skb: buffer* Returns skb dst_entry, regardless of reference taken or not. 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...
iph->protocol= sk->sk_protocol; /* IPPROTO_UDP in this case */ iph->saddr= rt->rt_src; iph->daddr= rt->rt_dst; ip_send_check(iph); skb->priority= sk->sk_priority; skb->dst= dst_clone(&rt->u.dst); This is what a new SKBlooks like after we push the IPv4 header to t...
iph->protocol= sk->sk_protocol; /* IPPROTO_UDP in this case */ iph->saddr= rt->rt_src; iph->daddr= rt->rt_dst; ip_send_check(iph); skb->priority= sk->sk_priority; skb->dst= dst_clone(&rt->u.dst); This is what a new SKBlooks like after we push the IPv4 header to t...
Development version of the Upstream MultiPath TCP Linux kernel 🐧 - [SK_BUFF]: Introduce skb_transport_header(skb) · multipath-tcp/mptcp_net-next@9c70220
skb->dst = dst_clone(&rt->u.dst); This is what a new SKB looks like after we push the IPv4 header to the front of the SKB. Just as above for UDP, skb_push() decrements 'skb->data' and increments 'skb->len'. We update the 'skb->nh.raw' pointer to the beginning of the ...
This first diagram illustrates the layout of the SKB data area and where in that area the various pointers in 'structsk_buff' point. The rest of this page will walk through what the SKB data ar...查看原文(OK) 第五章 传输层(tcp)到网络层(ip)--基于Linux3.10 - dst_neigh_output() - ...
dstbuf = opt->dst1; #endif @@ -443,7 +443,7 @@ looped_back: break; } - opt->lastopt = opt->srcrt = skb->h.raw - skb->nh.raw; + opt->lastopt = opt->srcrt = skb_network_header_len(skb); skb->h.raw += (hdr->hdrlen + 1) << 3; ...
In packet offload, packets are not encrypted in XFRM stack, so the next network layer which the packets will be forwarded to should depend on where the packet came from (either xfrm4_output or xfrm6_output) rather than the matched SA's family type. Test: verified IPv6-in-IPv4 packets ...
因为自己在iptables的OUTPUT链上挂载了一个target,这个时候捕捉到的数据包是3层的, 还没有mac地址头,因此上面的办法行不通。 2.按照内核arp.c的arp_find函数写一个查询arp的函数,如下: /*从内核arp.c扣的arp_find函数,把skb-dev改为了dst-dev*/
在UDP IPv4 情况下,上面的 output 方法指向的是 ip_output : intip_output(structsk_buff*skb) { structnet_device*dev=skb_dst(skb)->dev; IP_UPD_PO_STATS(dev_net(dev),IPSTATS_MIB_OUT,skb->len); skb->dev=dev; skb->protocol=htons(ETH_P_IP); ...