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inet_diag: Introduce the byte-code run on an inet socket

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The upcoming UDP module will require exactly this ability, so just
move the existing code to provide one.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2011-12-09 06:22:44 +00:00 committed by David S. Miller
parent efb3cb428d
commit 8d07d1518a
2 changed files with 33 additions and 24 deletions
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2
include/linux/inet_diag.h
View File

@ -135,6 +135,7 @@ struct tcpvegas_info {
#ifdef __KERNEL__
struct sock;
struct inet_hashinfo;
struct nlattr;
struct inet_diag_handler {
struct inet_hashinfo *idiag_hashinfo;
@ -144,6 +145,7 @@ struct inet_diag_handler {
__u16 idiag_type;
};
int inet_diag_bc_sk(const struct nlattr *_bc, struct sock *sk);
int inet_diag_check_cookie(struct sock *sk, struct inet_diag_req *req);
extern int inet_diag_register(const struct inet_diag_handler *handler);

55
net/ipv4/inet_diag.c
View File

@ -449,6 +449,35 @@ static int inet_diag_bc_run(const struct nlattr *_bc,
return len == 0;
}
int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk)
{
struct inet_diag_entry entry;
struct inet_sock *inet = inet_sk(sk);
if (bc == NULL)
return 1;
entry.family = sk->sk_family;
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
if (entry.family == AF_INET6) {
struct ipv6_pinfo *np = inet6_sk(sk);
entry.saddr = np->rcv_saddr.s6_addr32;
entry.daddr = np->daddr.s6_addr32;
} else
#endif
{
entry.saddr = &inet->inet_rcv_saddr;
entry.daddr = &inet->inet_daddr;
}
entry.sport = inet->inet_num;
entry.dport = ntohs(inet->inet_dport);
entry.userlocks = sk->sk_userlocks;
return inet_diag_bc_run(bc, &entry);
}
EXPORT_SYMBOL_GPL(inet_diag_bc_sk);
static int valid_cc(const void *bc, int len, int cc)
{
while (len >= 0) {
@ -509,30 +538,8 @@ static int inet_csk_diag_dump(struct sock *sk,
struct inet_diag_req *r,
const struct nlattr *bc)
{
if (bc != NULL) {
struct inet_diag_entry entry;
struct inet_sock *inet = inet_sk(sk);
entry.family = sk->sk_family;
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
if (entry.family == AF_INET6) {
struct ipv6_pinfo *np = inet6_sk(sk);
entry.saddr = np->rcv_saddr.s6_addr32;
entry.daddr = np->daddr.s6_addr32;
} else
#endif
{
entry.saddr = &inet->inet_rcv_saddr;
entry.daddr = &inet->inet_daddr;
}
entry.sport = inet->inet_num;
entry.dport = ntohs(inet->inet_dport);
entry.userlocks = sk->sk_userlocks;
if (!inet_diag_bc_run(bc, &entry))
return 0;
}
if (!inet_diag_bc_sk(bc, sk))
return 0;
return inet_csk_diag_fill(sk, skb, r,
NETLINK_CB(cb->skb).pid,