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| author | Pavel Emelyanov <xemul@parallels.com> | 2011-12-15 06:43:44 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-12-16 22:48:27 +0400 |
| commit | f65c1b534b99aef1809b893387b295963821549f (patch) | |
| tree | 0718e1598b4d01c4c1817a3c663a312616f0dddd /net/core/sock_diag.c | |
| parent | aec8dc62f66199aef153d86e1f90d9c1d14696e3 (diff) | |
| download | linux-f65c1b534b99aef1809b893387b295963821549f.tar.xz | |
sock_diag: Generalize requests cookies managements
The sk address is used as a cookie between dump/get_exact calls.
It will be required for unix socket sdumping, so move it from
inet_diag to sock_diag.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/sock_diag.c')
| -rw-r--r-- | net/core/sock_diag.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/net/core/sock_diag.c b/net/core/sock_diag.c index cee96f368108..711bdefe7753 100644 --- a/net/core/sock_diag.c +++ b/net/core/sock_diag.c @@ -12,6 +12,25 @@ static struct sock_diag_handler *sock_diag_handlers[AF_MAX]; static int (*inet_rcv_compat)(struct sk_buff *skb, struct nlmsghdr *nlh); static DEFINE_MUTEX(sock_diag_table_mutex); +int sock_diag_check_cookie(void *sk, __u32 *cookie) +{ + if ((cookie[0] != INET_DIAG_NOCOOKIE || + cookie[1] != INET_DIAG_NOCOOKIE) && + ((u32)(unsigned long)sk != cookie[0] || + (u32)((((unsigned long)sk) >> 31) >> 1) != cookie[1])) + return -ESTALE; + else + return 0; +} +EXPORT_SYMBOL_GPL(sock_diag_check_cookie); + +void sock_diag_save_cookie(void *sk, __u32 *cookie) +{ + cookie[0] = (u32)(unsigned long)sk; + cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1); +} +EXPORT_SYMBOL_GPL(sock_diag_save_cookie); + void sock_diag_register_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh)) { mutex_lock(&sock_diag_table_mutex); |