mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-08 17:18:05 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
584
net/sched/act_csum.c
Normal file
584
net/sched/act_csum.c
Normal file
|
@ -0,0 +1,584 @@
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/*
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* Checksum updating actions
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*
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* Copyright (c) 2010 Gregoire Baron <baronchon@n7mm.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/spinlock.h>
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#include <linux/netlink.h>
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#include <net/netlink.h>
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#include <linux/rtnetlink.h>
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#include <linux/skbuff.h>
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#include <net/ip.h>
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#include <net/ipv6.h>
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#include <net/icmp.h>
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#include <linux/icmpv6.h>
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#include <linux/igmp.h>
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#include <net/tcp.h>
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#include <net/udp.h>
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#include <net/ip6_checksum.h>
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#include <net/act_api.h>
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#include <linux/tc_act/tc_csum.h>
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#include <net/tc_act/tc_csum.h>
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#define CSUM_TAB_MASK 15
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static const struct nla_policy csum_policy[TCA_CSUM_MAX + 1] = {
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[TCA_CSUM_PARMS] = { .len = sizeof(struct tc_csum), },
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};
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static int tcf_csum_init(struct net *n, struct nlattr *nla, struct nlattr *est,
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struct tc_action *a, int ovr, int bind)
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{
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struct nlattr *tb[TCA_CSUM_MAX + 1];
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struct tc_csum *parm;
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struct tcf_csum *p;
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int ret = 0, err;
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if (nla == NULL)
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return -EINVAL;
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err = nla_parse_nested(tb, TCA_CSUM_MAX, nla, csum_policy);
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if (err < 0)
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return err;
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if (tb[TCA_CSUM_PARMS] == NULL)
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return -EINVAL;
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parm = nla_data(tb[TCA_CSUM_PARMS]);
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if (!tcf_hash_check(parm->index, a, bind)) {
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ret = tcf_hash_create(parm->index, est, a, sizeof(*p), bind);
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if (ret)
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return ret;
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ret = ACT_P_CREATED;
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} else {
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if (bind)/* dont override defaults */
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return 0;
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tcf_hash_release(a, bind);
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if (!ovr)
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return -EEXIST;
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}
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p = to_tcf_csum(a);
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spin_lock_bh(&p->tcf_lock);
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p->tcf_action = parm->action;
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p->update_flags = parm->update_flags;
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spin_unlock_bh(&p->tcf_lock);
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if (ret == ACT_P_CREATED)
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tcf_hash_insert(a);
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return ret;
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}
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/**
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* tcf_csum_skb_nextlayer - Get next layer pointer
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* @skb: sk_buff to use
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* @ihl: previous summed headers length
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* @ipl: complete packet length
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* @jhl: next header length
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*
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* Check the expected next layer availability in the specified sk_buff.
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* Return the next layer pointer if pass, NULL otherwise.
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*/
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static void *tcf_csum_skb_nextlayer(struct sk_buff *skb,
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unsigned int ihl, unsigned int ipl,
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unsigned int jhl)
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{
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int ntkoff = skb_network_offset(skb);
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int hl = ihl + jhl;
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if (!pskb_may_pull(skb, ipl + ntkoff) || (ipl < hl) ||
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(skb_cloned(skb) &&
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!skb_clone_writable(skb, hl + ntkoff) &&
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pskb_expand_head(skb, 0, 0, GFP_ATOMIC)))
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return NULL;
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else
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return (void *)(skb_network_header(skb) + ihl);
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}
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static int tcf_csum_ipv4_icmp(struct sk_buff *skb,
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unsigned int ihl, unsigned int ipl)
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{
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struct icmphdr *icmph;
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icmph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*icmph));
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if (icmph == NULL)
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return 0;
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icmph->checksum = 0;
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skb->csum = csum_partial(icmph, ipl - ihl, 0);
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icmph->checksum = csum_fold(skb->csum);
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skb->ip_summed = CHECKSUM_NONE;
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return 1;
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}
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static int tcf_csum_ipv4_igmp(struct sk_buff *skb,
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unsigned int ihl, unsigned int ipl)
|
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{
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struct igmphdr *igmph;
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igmph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*igmph));
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if (igmph == NULL)
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return 0;
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igmph->csum = 0;
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skb->csum = csum_partial(igmph, ipl - ihl, 0);
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igmph->csum = csum_fold(skb->csum);
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skb->ip_summed = CHECKSUM_NONE;
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return 1;
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}
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static int tcf_csum_ipv6_icmp(struct sk_buff *skb,
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unsigned int ihl, unsigned int ipl)
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{
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struct icmp6hdr *icmp6h;
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const struct ipv6hdr *ip6h;
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icmp6h = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*icmp6h));
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if (icmp6h == NULL)
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return 0;
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ip6h = ipv6_hdr(skb);
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icmp6h->icmp6_cksum = 0;
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skb->csum = csum_partial(icmp6h, ipl - ihl, 0);
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icmp6h->icmp6_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
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ipl - ihl, IPPROTO_ICMPV6,
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skb->csum);
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skb->ip_summed = CHECKSUM_NONE;
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return 1;
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}
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static int tcf_csum_ipv4_tcp(struct sk_buff *skb,
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unsigned int ihl, unsigned int ipl)
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||||
{
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||||
struct tcphdr *tcph;
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const struct iphdr *iph;
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tcph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*tcph));
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if (tcph == NULL)
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return 0;
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iph = ip_hdr(skb);
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tcph->check = 0;
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skb->csum = csum_partial(tcph, ipl - ihl, 0);
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tcph->check = tcp_v4_check(ipl - ihl,
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iph->saddr, iph->daddr, skb->csum);
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skb->ip_summed = CHECKSUM_NONE;
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return 1;
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}
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static int tcf_csum_ipv6_tcp(struct sk_buff *skb,
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unsigned int ihl, unsigned int ipl)
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{
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struct tcphdr *tcph;
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const struct ipv6hdr *ip6h;
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tcph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*tcph));
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if (tcph == NULL)
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return 0;
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ip6h = ipv6_hdr(skb);
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tcph->check = 0;
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skb->csum = csum_partial(tcph, ipl - ihl, 0);
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tcph->check = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
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ipl - ihl, IPPROTO_TCP,
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skb->csum);
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skb->ip_summed = CHECKSUM_NONE;
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return 1;
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}
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static int tcf_csum_ipv4_udp(struct sk_buff *skb,
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unsigned int ihl, unsigned int ipl, int udplite)
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{
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struct udphdr *udph;
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const struct iphdr *iph;
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u16 ul;
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/*
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* Support both UDP and UDPLITE checksum algorithms, Don't use
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* udph->len to get the real length without any protocol check,
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* UDPLITE uses udph->len for another thing,
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* Use iph->tot_len, or just ipl.
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*/
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udph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*udph));
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if (udph == NULL)
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return 0;
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iph = ip_hdr(skb);
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ul = ntohs(udph->len);
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if (udplite || udph->check) {
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udph->check = 0;
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if (udplite) {
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if (ul == 0)
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skb->csum = csum_partial(udph, ipl - ihl, 0);
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else if ((ul >= sizeof(*udph)) && (ul <= ipl - ihl))
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skb->csum = csum_partial(udph, ul, 0);
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else
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goto ignore_obscure_skb;
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} else {
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if (ul != ipl - ihl)
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goto ignore_obscure_skb;
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skb->csum = csum_partial(udph, ul, 0);
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}
|
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udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
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ul, iph->protocol,
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skb->csum);
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if (!udph->check)
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udph->check = CSUM_MANGLED_0;
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}
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||||
skb->ip_summed = CHECKSUM_NONE;
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|
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ignore_obscure_skb:
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return 1;
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||||
}
|
||||
|
||||
static int tcf_csum_ipv6_udp(struct sk_buff *skb,
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unsigned int ihl, unsigned int ipl, int udplite)
|
||||
{
|
||||
struct udphdr *udph;
|
||||
const struct ipv6hdr *ip6h;
|
||||
u16 ul;
|
||||
|
||||
/*
|
||||
* Support both UDP and UDPLITE checksum algorithms, Don't use
|
||||
* udph->len to get the real length without any protocol check,
|
||||
* UDPLITE uses udph->len for another thing,
|
||||
* Use ip6h->payload_len + sizeof(*ip6h) ... , or just ipl.
|
||||
*/
|
||||
|
||||
udph = tcf_csum_skb_nextlayer(skb, ihl, ipl, sizeof(*udph));
|
||||
if (udph == NULL)
|
||||
return 0;
|
||||
|
||||
ip6h = ipv6_hdr(skb);
|
||||
ul = ntohs(udph->len);
|
||||
|
||||
udph->check = 0;
|
||||
|
||||
if (udplite) {
|
||||
if (ul == 0)
|
||||
skb->csum = csum_partial(udph, ipl - ihl, 0);
|
||||
|
||||
else if ((ul >= sizeof(*udph)) && (ul <= ipl - ihl))
|
||||
skb->csum = csum_partial(udph, ul, 0);
|
||||
|
||||
else
|
||||
goto ignore_obscure_skb;
|
||||
} else {
|
||||
if (ul != ipl - ihl)
|
||||
goto ignore_obscure_skb;
|
||||
|
||||
skb->csum = csum_partial(udph, ul, 0);
|
||||
}
|
||||
|
||||
udph->check = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, ul,
|
||||
udplite ? IPPROTO_UDPLITE : IPPROTO_UDP,
|
||||
skb->csum);
|
||||
|
||||
if (!udph->check)
|
||||
udph->check = CSUM_MANGLED_0;
|
||||
|
||||
skb->ip_summed = CHECKSUM_NONE;
|
||||
|
||||
ignore_obscure_skb:
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int tcf_csum_ipv4(struct sk_buff *skb, u32 update_flags)
|
||||
{
|
||||
const struct iphdr *iph;
|
||||
int ntkoff;
|
||||
|
||||
ntkoff = skb_network_offset(skb);
|
||||
|
||||
if (!pskb_may_pull(skb, sizeof(*iph) + ntkoff))
|
||||
goto fail;
|
||||
|
||||
iph = ip_hdr(skb);
|
||||
|
||||
switch (iph->frag_off & htons(IP_OFFSET) ? 0 : iph->protocol) {
|
||||
case IPPROTO_ICMP:
|
||||
if (update_flags & TCA_CSUM_UPDATE_FLAG_ICMP)
|
||||
if (!tcf_csum_ipv4_icmp(skb, iph->ihl * 4,
|
||||
ntohs(iph->tot_len)))
|
||||
goto fail;
|
||||
break;
|
||||
case IPPROTO_IGMP:
|
||||
if (update_flags & TCA_CSUM_UPDATE_FLAG_IGMP)
|
||||
if (!tcf_csum_ipv4_igmp(skb, iph->ihl * 4,
|
||||
ntohs(iph->tot_len)))
|
||||
goto fail;
|
||||
break;
|
||||
case IPPROTO_TCP:
|
||||
if (update_flags & TCA_CSUM_UPDATE_FLAG_TCP)
|
||||
if (!tcf_csum_ipv4_tcp(skb, iph->ihl * 4,
|
||||
ntohs(iph->tot_len)))
|
||||
goto fail;
|
||||
break;
|
||||
case IPPROTO_UDP:
|
||||
if (update_flags & TCA_CSUM_UPDATE_FLAG_UDP)
|
||||
if (!tcf_csum_ipv4_udp(skb, iph->ihl * 4,
|
||||
ntohs(iph->tot_len), 0))
|
||||
goto fail;
|
||||
break;
|
||||
case IPPROTO_UDPLITE:
|
||||
if (update_flags & TCA_CSUM_UPDATE_FLAG_UDPLITE)
|
||||
if (!tcf_csum_ipv4_udp(skb, iph->ihl * 4,
|
||||
ntohs(iph->tot_len), 1))
|
||||
goto fail;
|
||||
break;
|
||||
}
|
||||
|
||||
if (update_flags & TCA_CSUM_UPDATE_FLAG_IPV4HDR) {
|
||||
if (skb_cloned(skb) &&
|
||||
!skb_clone_writable(skb, sizeof(*iph) + ntkoff) &&
|
||||
pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
|
||||
goto fail;
|
||||
|
||||
ip_send_check(ip_hdr(skb));
|
||||
}
|
||||
|
||||
return 1;
|
||||
|
||||
fail:
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tcf_csum_ipv6_hopopts(struct ipv6_opt_hdr *ip6xh,
|
||||
unsigned int ixhl, unsigned int *pl)
|
||||
{
|
||||
int off, len, optlen;
|
||||
unsigned char *xh = (void *)ip6xh;
|
||||
|
||||
off = sizeof(*ip6xh);
|
||||
len = ixhl - off;
|
||||
|
||||
while (len > 1) {
|
||||
switch (xh[off]) {
|
||||
case IPV6_TLV_PAD1:
|
||||
optlen = 1;
|
||||
break;
|
||||
case IPV6_TLV_JUMBO:
|
||||
optlen = xh[off + 1] + 2;
|
||||
if (optlen != 6 || len < 6 || (off & 3) != 2)
|
||||
/* wrong jumbo option length/alignment */
|
||||
return 0;
|
||||
*pl = ntohl(*(__be32 *)(xh + off + 2));
|
||||
goto done;
|
||||
default:
|
||||
optlen = xh[off + 1] + 2;
|
||||
if (optlen > len)
|
||||
/* ignore obscure options */
|
||||
goto done;
|
||||
break;
|
||||
}
|
||||
off += optlen;
|
||||
len -= optlen;
|
||||
}
|
||||
|
||||
done:
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int tcf_csum_ipv6(struct sk_buff *skb, u32 update_flags)
|
||||
{
|
||||
struct ipv6hdr *ip6h;
|
||||
struct ipv6_opt_hdr *ip6xh;
|
||||
unsigned int hl, ixhl;
|
||||
unsigned int pl;
|
||||
int ntkoff;
|
||||
u8 nexthdr;
|
||||
|
||||
ntkoff = skb_network_offset(skb);
|
||||
|
||||
hl = sizeof(*ip6h);
|
||||
|
||||
if (!pskb_may_pull(skb, hl + ntkoff))
|
||||
goto fail;
|
||||
|
||||
ip6h = ipv6_hdr(skb);
|
||||
|
||||
pl = ntohs(ip6h->payload_len);
|
||||
nexthdr = ip6h->nexthdr;
|
||||
|
||||
do {
|
||||
switch (nexthdr) {
|
||||
case NEXTHDR_FRAGMENT:
|
||||
goto ignore_skb;
|
||||
case NEXTHDR_ROUTING:
|
||||
case NEXTHDR_HOP:
|
||||
case NEXTHDR_DEST:
|
||||
if (!pskb_may_pull(skb, hl + sizeof(*ip6xh) + ntkoff))
|
||||
goto fail;
|
||||
ip6xh = (void *)(skb_network_header(skb) + hl);
|
||||
ixhl = ipv6_optlen(ip6xh);
|
||||
if (!pskb_may_pull(skb, hl + ixhl + ntkoff))
|
||||
goto fail;
|
||||
ip6xh = (void *)(skb_network_header(skb) + hl);
|
||||
if ((nexthdr == NEXTHDR_HOP) &&
|
||||
!(tcf_csum_ipv6_hopopts(ip6xh, ixhl, &pl)))
|
||||
goto fail;
|
||||
nexthdr = ip6xh->nexthdr;
|
||||
hl += ixhl;
|
||||
break;
|
||||
case IPPROTO_ICMPV6:
|
||||
if (update_flags & TCA_CSUM_UPDATE_FLAG_ICMP)
|
||||
if (!tcf_csum_ipv6_icmp(skb,
|
||||
hl, pl + sizeof(*ip6h)))
|
||||
goto fail;
|
||||
goto done;
|
||||
case IPPROTO_TCP:
|
||||
if (update_flags & TCA_CSUM_UPDATE_FLAG_TCP)
|
||||
if (!tcf_csum_ipv6_tcp(skb,
|
||||
hl, pl + sizeof(*ip6h)))
|
||||
goto fail;
|
||||
goto done;
|
||||
case IPPROTO_UDP:
|
||||
if (update_flags & TCA_CSUM_UPDATE_FLAG_UDP)
|
||||
if (!tcf_csum_ipv6_udp(skb, hl,
|
||||
pl + sizeof(*ip6h), 0))
|
||||
goto fail;
|
||||
goto done;
|
||||
case IPPROTO_UDPLITE:
|
||||
if (update_flags & TCA_CSUM_UPDATE_FLAG_UDPLITE)
|
||||
if (!tcf_csum_ipv6_udp(skb, hl,
|
||||
pl + sizeof(*ip6h), 1))
|
||||
goto fail;
|
||||
goto done;
|
||||
default:
|
||||
goto ignore_skb;
|
||||
}
|
||||
} while (pskb_may_pull(skb, hl + 1 + ntkoff));
|
||||
|
||||
done:
|
||||
ignore_skb:
|
||||
return 1;
|
||||
|
||||
fail:
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tcf_csum(struct sk_buff *skb,
|
||||
const struct tc_action *a, struct tcf_result *res)
|
||||
{
|
||||
struct tcf_csum *p = a->priv;
|
||||
int action;
|
||||
u32 update_flags;
|
||||
|
||||
spin_lock(&p->tcf_lock);
|
||||
p->tcf_tm.lastuse = jiffies;
|
||||
bstats_update(&p->tcf_bstats, skb);
|
||||
action = p->tcf_action;
|
||||
update_flags = p->update_flags;
|
||||
spin_unlock(&p->tcf_lock);
|
||||
|
||||
if (unlikely(action == TC_ACT_SHOT))
|
||||
goto drop;
|
||||
|
||||
switch (skb->protocol) {
|
||||
case cpu_to_be16(ETH_P_IP):
|
||||
if (!tcf_csum_ipv4(skb, update_flags))
|
||||
goto drop;
|
||||
break;
|
||||
case cpu_to_be16(ETH_P_IPV6):
|
||||
if (!tcf_csum_ipv6(skb, update_flags))
|
||||
goto drop;
|
||||
break;
|
||||
}
|
||||
|
||||
return action;
|
||||
|
||||
drop:
|
||||
spin_lock(&p->tcf_lock);
|
||||
p->tcf_qstats.drops++;
|
||||
spin_unlock(&p->tcf_lock);
|
||||
return TC_ACT_SHOT;
|
||||
}
|
||||
|
||||
static int tcf_csum_dump(struct sk_buff *skb,
|
||||
struct tc_action *a, int bind, int ref)
|
||||
{
|
||||
unsigned char *b = skb_tail_pointer(skb);
|
||||
struct tcf_csum *p = a->priv;
|
||||
struct tc_csum opt = {
|
||||
.update_flags = p->update_flags,
|
||||
.index = p->tcf_index,
|
||||
.action = p->tcf_action,
|
||||
.refcnt = p->tcf_refcnt - ref,
|
||||
.bindcnt = p->tcf_bindcnt - bind,
|
||||
};
|
||||
struct tcf_t t;
|
||||
|
||||
if (nla_put(skb, TCA_CSUM_PARMS, sizeof(opt), &opt))
|
||||
goto nla_put_failure;
|
||||
t.install = jiffies_to_clock_t(jiffies - p->tcf_tm.install);
|
||||
t.lastuse = jiffies_to_clock_t(jiffies - p->tcf_tm.lastuse);
|
||||
t.expires = jiffies_to_clock_t(p->tcf_tm.expires);
|
||||
if (nla_put(skb, TCA_CSUM_TM, sizeof(t), &t))
|
||||
goto nla_put_failure;
|
||||
|
||||
return skb->len;
|
||||
|
||||
nla_put_failure:
|
||||
nlmsg_trim(skb, b);
|
||||
return -1;
|
||||
}
|
||||
|
||||
static struct tc_action_ops act_csum_ops = {
|
||||
.kind = "csum",
|
||||
.type = TCA_ACT_CSUM,
|
||||
.owner = THIS_MODULE,
|
||||
.act = tcf_csum,
|
||||
.dump = tcf_csum_dump,
|
||||
.init = tcf_csum_init,
|
||||
};
|
||||
|
||||
MODULE_DESCRIPTION("Checksum updating actions");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
static int __init csum_init_module(void)
|
||||
{
|
||||
return tcf_register_action(&act_csum_ops, CSUM_TAB_MASK);
|
||||
}
|
||||
|
||||
static void __exit csum_cleanup_module(void)
|
||||
{
|
||||
tcf_unregister_action(&act_csum_ops);
|
||||
}
|
||||
|
||||
module_init(csum_init_module);
|
||||
module_exit(csum_cleanup_module);
|
Loading…
Add table
Add a link
Reference in a new issue