Commit f5248b48 authored by Pavel Emelyanov's avatar Pavel Emelyanov Committed by David S. Miller
Browse files

unix_diag: Unix socket name NLA 



Report the sun_path when requested as NLA. With leading '\0' if
present but without the leading AF_UNIX bits.

Signed-off-by: default avatarPavel Emelyanov <xemul@parallels.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5d3cae8b

include/linux/unix_diag.h

+8 −0
Original line number Diff line number Diff line
@@ -11,6 +11,8 @@ struct unix_diag_req { 
	__u32	udiag_cookie[2];

};



#define UDIAG_SHOW_NAME		0x00000001	/* show name (not path) */



struct unix_diag_msg {

	__u8	udiag_family;

	__u8	udiag_type;
@@ -21,4 +23,10 @@ struct unix_diag_msg { 
	__u32	udiag_cookie[2];

};



enum {

	UNIX_DIAG_NAME,



	UNIX_DIAG_MAX,

};



#endif

net/unix/diag.c

+20 −0
Original line number Diff line number Diff line
@@ -10,6 +10,22 @@ 
#define UNIX_DIAG_PUT(skb, attrtype, attrlen) \

	RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))



static int sk_diag_dump_name(struct sock *sk, struct sk_buff *nlskb)

{

	struct unix_address *addr = unix_sk(sk)->addr;

	char *s;



	if (addr) {

		s = UNIX_DIAG_PUT(nlskb, UNIX_DIAG_NAME, addr->len - sizeof(short));

		memcpy(s, addr->name->sun_path, addr->len - sizeof(short));

	}



	return 0;



rtattr_failure:

	return -EMSGSIZE;

}



static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, struct unix_diag_req *req,

		u32 pid, u32 seq, u32 flags, int sk_ino)

{
@@ -28,6 +44,10 @@ static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, struct unix_diag_r 
	rep->udiag_ino = sk_ino;

	sock_diag_save_cookie(sk, rep->udiag_cookie);



	if ((req->udiag_show & UDIAG_SHOW_NAME) &&

			sk_diag_dump_name(sk, skb))

		goto nlmsg_failure;



	nlh->nlmsg_len = skb_tail_pointer(skb) - b;

	return skb->len;