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typedef unsigned char __u8;
typedef unsigned short __u16;
typedef unsigned int __u32;
typedef unsigned long __kernel_size_t;
typedef __kernel_size_t size_t;
typedef __u8 uint8_t;
typedef __u16 __be16;
typedef __u32 __be32;
struct msghdr {
struct iovec * msg_iov;
unsigned msg_flags;
};
enum { IPPROTO_ICMP = 1 };
struct sk_buff { };
static inline __attribute__((always_inline)) struct dst_entry *
skb_dst(const struct sk_buff *skb)
{
};
enum nf_inet_hooks { NF_INET_LOCAL_OUT };
struct net_device {
unsigned mtu;
};
static inline __attribute__((always_inline)) int
NF_HOOK_THRESH(uint8_t pf, unsigned int hook, struct sk_buff *skb,
struct net_device *in, struct net_device *out,
int (*okfn)(struct sk_buff *), int thresh)
{
int ret = nf_hook_thresh(pf, hook, skb, in, out, okfn, thresh);
if (ret == 1)
ret = okfn(skb);
return ret;
}
static inline __attribute__((always_inline)) int
NF_HOOK(uint8_t pf, unsigned int hook, struct sk_buff *skb,
struct net_device *in, struct net_device *out,
int (*okfn)(struct sk_buff *))
{
return NF_HOOK_THRESH(pf, hook, skb, in, out, okfn, (-((int)(~0U>>1)) - 1));
}
struct dst_entry {
struct net_device *dev;
int (*output)(struct sk_buff*);
};
static inline __attribute__((always_inline)) int dst_output(struct sk_buff *skb) {
return skb_dst(skb)->output(skb);
};
struct iphdr {
__u8 protocol;
};
struct inet_sock {
__be16 inet_dport;
__u8 recverr: 1, hdrincl: 1;
struct { } cork;
};
struct icmphdr {
__u8 type;
};
struct rtable {
union { struct dst_entry dst; } u;
__be32 rt_dst;
};
struct sock;
struct inet_sock *inet_sk (struct sock *);
struct net *sock_net (struct sock *);
void *skb_transport_header (struct sk_buff *);
static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
struct rtable *rt, unsigned int flags)
{
struct inet_sock *inet = inet_sk(sk);
struct net *net = sock_net(sk);
struct iphdr *iph;
struct sk_buff *skb;
if (length > rt->u.dst.dev->mtu)
ip_local_error(sk, 90, rt->rt_dst, inet->inet_dport, rt->u.dst.dev->mtu);
if (flags&0x10)
goto out;
if (iph->protocol == IPPROTO_ICMP)
icmp_out_count(net, ((struct icmphdr *)skb_transport_header(skb))->type);
NF_HOOK(2, NF_INET_LOCAL_OUT, skb, ((void *)0), rt->u.dst.dev,
dst_output);
out:
while (0);
}
int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
{
raw_send_hdrinc(sk, msg->msg_iov, len, (void *)0, msg->msg_flags);
}
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