1 #ifndef __LINUX_NET_SCM_H
2 #define __LINUX_NET_SCM_H
4 #include <linux/limits.h>
7 /* Well, we should have at least one descriptor open
8 * to accept passed FDs 8)
10 #define SCM_MAX_FD (OPEN_MAX-1)
15 struct file *fp[SCM_MAX_FD];
20 struct ucred creds; /* Skb credentials */
21 struct scm_fp_list *fp; /* Passed files */
22 unsigned long seq; /* Connection seqno */
25 extern void scm_detach_fds(struct msghdr *msg, struct scm_cookie *scm);
26 extern void scm_detach_fds_compat(struct msghdr *msg, struct scm_cookie *scm);
27 extern int __scm_send(struct socket *sock, struct msghdr *msg, struct scm_cookie *scm);
28 extern void __scm_destroy(struct scm_cookie *scm);
29 extern struct scm_fp_list * scm_fp_dup(struct scm_fp_list *fpl);
31 static __inline__ void scm_destroy(struct scm_cookie *scm)
37 static __inline__ int scm_send(struct socket *sock, struct msghdr *msg,
38 struct scm_cookie *scm)
40 struct task_struct *p = current;
41 scm->creds.uid = p->uid;
42 scm->creds.gid = p->gid;
43 scm->creds.pid = p->tgid;
46 if (msg->msg_controllen <= 0)
48 return __scm_send(sock, msg, scm);
51 static __inline__ void scm_recv(struct socket *sock, struct msghdr *msg,
52 struct scm_cookie *scm, int flags)
54 if (!msg->msg_control)
56 if (test_bit(SOCK_PASSCRED, &sock->flags) || scm->fp)
57 msg->msg_flags |= MSG_CTRUNC;
62 if (test_bit(SOCK_PASSCRED, &sock->flags))
63 put_cmsg(msg, SOL_SOCKET, SCM_CREDENTIALS, sizeof(scm->creds), &scm->creds);
68 scm_detach_fds(msg, scm);
72 #endif /* __LINUX_NET_SCM_H */