diff options
| author | Pavel Emelyanov <xemul@parallels.com> | 2011-12-15 06:45:24 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-12-16 22:48:28 +0400 |
| commit | f5248b48a64c221dd6157ab9cbee5a36ee45e6ed (patch) | |
| tree | f03c84d11417f77827060f48e1bf09435a28c25b | |
| parent | 5d3cae8bc39dd38d1aa5fd4bbc788c7b43fcaa71 (diff) | |
| download | linux-f5248b48a64c221dd6157ab9cbee5a36ee45e6ed.tar.xz | |
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: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/linux/unix_diag.h | 8 | ||||
| -rw-r--r-- | net/unix/diag.c | 20 |
2 files changed, 28 insertions, 0 deletions
diff --git a/include/linux/unix_diag.h b/include/linux/unix_diag.h index 445184a85763..cc4df34d4c14 100644 --- a/include/linux/unix_diag.h +++ b/include/linux/unix_diag.h @@ -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 diff --git a/net/unix/diag.c b/net/unix/diag.c index d7bd48c49ee5..161ce6c05e31 100644 --- a/net/unix/diag.c +++ b/net/unix/diag.c @@ -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; |