1 #ifndef __LINUX_NET_SCM_H
2 #define __LINUX_NET_SCM_H
3
4 /* Well, we should have at least one descriptor open
5 * to accept passed FDs 8)
6 */
7 #define SCM_MAX_FD (OPEN_MAX-1)
8
9 struct scm_fp_list
10 {
11 int count;
12 struct file *fp[SCM_MAX_FD];
13 };
14
15 struct scm_cookie
16 {
17 struct ucred creds; /* Skb credentials */
18 struct scm_fp_list *fp; /* Passed files */
19 unsigned long seq; /* Connection seqno */
20 };
21
22 extern void scm_detach_fds(struct msghdr *msg, struct scm_cookie *scm);
23 extern int __scm_send(struct socket *sock, struct msghdr *msg, struct scm_cookie *scm);
24 extern void __scm_destroy(struct scm_cookie *scm);
25 extern struct scm_fp_list * scm_fp_dup(struct scm_fp_list *fpl);
26
27 static __inline__ void scm_destroy(struct scm_cookie *scm)
28 {
29 if (scm && scm->fp)
30 __scm_destroy(scm);
31 }
32
33 static __inline__ int scm_send(struct socket *sock, struct msghdr *msg,
34 struct scm_cookie *scm)
35 {
36 memset(scm, 0, sizeof(*scm));
37 scm->creds.uid = current->uid;
38 scm->creds.gid = current->gid;
39 scm->creds.pid = current->pid;
40 if (msg->msg_controllen <= 0)
41 return 0;
42 return __scm_send(sock, msg, scm);
43 }
44
45 static __inline__ void scm_recv(struct socket *sock, struct msghdr *msg,
46 struct scm_cookie *scm, int flags)
47 {
48 if (!msg->msg_control)
49 {
50 if (sock->passcred || scm->fp)
51 msg->msg_flags |= MSG_CTRUNC;
52 scm_destroy(scm);
53 return;
54 }
55
56 if (sock->passcred)
57 put_cmsg(msg, SOL_SOCKET, SCM_CREDENTIALS, sizeof(scm->creds), &scm->creds);
58
59 if (!scm->fp)
60 return;
61
62 scm_detach_fds(msg, scm);
63 }
64
65
66 #endif __LINUX_NET_SCM_H
67
68
This page was automatically generated by the
LXR engine.
Visit the LXR main site for more
information.