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Code Issues Releases Wiki Activity

extensions: reduce number of arguments to send_reset functions

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This commit is contained in:
Jan Engelhardt
2020-11-23 23:11:41 +01:00
parent f973577ec0
commit 9d5b2e2e0e
2 changed files with 29 additions and 28 deletions
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36
extensions/xt_TARPIT.c
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@@ -170,8 +170,8 @@ static bool tarpit_generic(struct tcphdr *tcph, const struct tcphdr *oth,
return true;
}
static void tarpit_tcp4(struct net *net, struct sock *sk,
struct sk_buff *oldskb, unsigned int hook, unsigned int mode)
static void tarpit_tcp4(const struct xt_action_param *par,
struct sk_buff *oldskb, unsigned int mode)
{
struct tcphdr _otcph, *tcph;
const struct tcphdr *oth;
@@ -191,7 +191,8 @@ static void tarpit_tcp4(struct net *net, struct sock *sk,
return;
/* Check checksum. */
if (nf_ip_checksum(oldskb, hook, ip_hdrlen(oldskb), IPPROTO_TCP))
if (nf_ip_checksum(oldskb, par->state->hook, ip_hdrlen(oldskb),
IPPROTO_TCP))
return;
/*
@@ -254,18 +255,19 @@ static void tarpit_tcp4(struct net *net, struct sock *sk,
#ifdef CONFIG_BRIDGE_NETFILTER
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 0, 0)
if (hook != NF_INET_FORWARD || ((struct nf_bridge_info *)skb_ext_find(nskb, SKB_EXT_BRIDGE_NF) != NULL &&
if (par->state->hook != NF_INET_FORWARD ||
((struct nf_bridge_info *)skb_ext_find(nskb, SKB_EXT_BRIDGE_NF) != NULL &&
((struct nf_bridge_info *)skb_ext_find(nskb, SKB_EXT_BRIDGE_NF))->physoutdev))
#else
if (hook != NF_INET_FORWARD || (nskb->nf_bridge != NULL &&
if (par->state->hook != NF_INET_FORWARD || (nskb->nf_bridge != NULL &&
nskb->nf_bridge->physoutdev != NULL))
#endif
#else
if (hook != NF_INET_FORWARD)
if (par->state->hook != NF_INET_FORWARD)
#endif
addr_type = RTN_LOCAL;
if (ip_route_me_harder(net, sk, nskb, addr_type) != 0)
if (ip_route_me_harder(par_net(par), par->state->sk, nskb, addr_type) != 0)
goto free_nskb;
else
niph = ip_hdr(nskb);
@@ -287,8 +289,8 @@ static void tarpit_tcp4(struct net *net, struct sock *sk,
goto free_nskb;
nf_ct_attach(nskb, oldskb);
NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, net, nskb->sk, nskb, NULL,
skb_dst(nskb)->dev, dst_output);
NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, par_net(par), nskb->sk, nskb,
NULL, skb_dst(nskb)->dev, dst_output);
return;
free_nskb:
@@ -296,8 +298,8 @@ static void tarpit_tcp4(struct net *net, struct sock *sk,
}
#ifdef WITH_IPV6
static void tarpit_tcp6(struct net *net, struct sock *sock,
struct sk_buff *oldskb, unsigned int hook, unsigned int mode)
static void tarpit_tcp6(const struct xt_action_param *par,
struct sk_buff *oldskb, unsigned int mode)
{
struct sk_buff *nskb;
struct tcphdr *tcph, oth;
@@ -398,14 +400,14 @@ static void tarpit_tcp6(struct net *net, struct sock *sock,
&ipv6_hdr(nskb)->daddr, sizeof(struct tcphdr),
IPPROTO_TCP,
csum_partial(tcph, sizeof(struct tcphdr), 0));
if (ip6_route_me_harder(net, nskb->sk, nskb))
if (ip6_route_me_harder(par_net(par), nskb->sk, nskb))
goto free_nskb;
nskb->ip_summed = CHECKSUM_NONE;
nf_ct_attach(nskb, oldskb);
NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, net, nskb->sk, nskb, NULL,
skb_dst(nskb)->dev, dst_output);
NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, par_net(par), nskb->sk, nskb,
NULL, skb_dst(nskb)->dev, dst_output);
return;
free_nskb:
@@ -443,8 +445,7 @@ tarpit_tg4(struct sk_buff *skb, const struct xt_action_param *par)
/* We are not interested in fragments */
if (iph->frag_off & htons(IP_OFFSET))
return NF_DROP;
tarpit_tcp4(par_net(par), par->state->sk, skb, par->state->hook,
info->variant);
tarpit_tcp4(par, skb, info->variant);
return NF_DROP;
}
@@ -485,8 +486,7 @@ tarpit_tg6(struct sk_buff *skb, const struct xt_action_param *par)
pr_debug("addr is not unicast.\n");
return NF_DROP;
}
tarpit_tcp6(par_net(par), par->state->sk, skb, par->state->hook,
info->variant);
tarpit_tcp6(par, skb, info->variant);
return NF_DROP;
}
#endif