下面的几个方法都试了，就是不好用。
struct tcphdr *tchp;
1、 tchp = (struct tcphdr *)skb_transport_header(pack);
2、 tchp = (struct tcphdr *)tcp_hdr(pack)；
3、 tchp = (struct tcphdr *)pack->data+20；
哪位给你取得tcp信息的例子，感激不尽！
iph = ip_hdr(pack);应该是iph = ip_hdr(*pack);
程序中其余地方请检查 pack是sk_buff ** 所以*pack才是sk_buff指针
另外 你的输入sk_buff看起来像是完整的raw packet 所以 即使正确使用了*pack 你的第3种也不对
3、 tchp = (struct tcphdr *)pack->data+20；
应该是 (*pack)->data + 34
另外的14是以太网头 毕业论文
/* reference to tcp.c */struct sk_buff *tcp_tso_segment(struct sk_buff *skb, int features) { struct sk_buff *segs = ERR_PTR(-EINVAL); struct tcphdr *th; unsigned thlen; unsigned int seq; unsigned int delta; unsigned int oldlen; unsigned int len; if (!pskb_may_pull(skb, sizeof(*th))) goto out; th = skb->h.th; thlen = th->doff * 4; if (thlen < sizeof(*th)) goto out; if (!pskb_may_pull(skb, thlen)) goto out; oldlen = (u16)~skb->len; __skb_pull(skb, thlen); if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) { /* Packet is from an untrusted source, reset gso_segs. */ int type = skb_shinfo(skb)->gso_type; int mss; if (unlikely(type & ~(SKB_GSO_TCPV4 | SKB_GSO_DODGY | SKB_GSO_TCP_ECN | SKB_GSO_TCPV6 | 0) || !(type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)))) goto out; mss = skb_shinfo(skb)->gso_size; skb_shinfo(skb)->gso_segs = (skb->len + mss - 1) / mss; segs = NULL; goto out; } segs = skb_segment(skb, features); if (IS_ERR(segs)) goto out; len = skb_shinfo(skb)->gso_size; delta = htonl(oldlen + (thlen + len)); skb = segs; th = skb->h.th; seq = ntohl(th->seq); do { th->fin = th->psh = 0; th->check = ~csum_fold(th->check + delta); if (skb->ip_summed != CHECKSUM_HW) th->check = csum_fold(csum_partial(skb->h.raw, thlen, skb->csum)); seq += len; skb = skb->next; th = skb->h.th; th->seq = htonl(seq); th->cwr = 0; } while (skb->next); delta = htonl(oldlen + (skb->tail - skb->h.raw) + skb->data_len); th->check = ~csum_fold(th->check + delta); if (skb->ip_summed != CHECKSUM_HW) th->check = csum_fold(csum_partial(skb->h.raw, thlen,