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 #ifdef CONFIG_SECURITY_NETWORK
23 char *secdata; /* Security context */
24 u32 seclen; /* Security length */
26 unsigned long seq; /* Connection seqno */
29 extern void scm_detach_fds(struct msghdr *msg, struct scm_cookie *scm);
30 extern void scm_detach_fds_compat(struct msghdr *msg, struct scm_cookie *scm);
31 extern int __scm_send(struct socket *sock, struct msghdr *msg, struct scm_cookie *scm);
32 extern void __scm_destroy(struct scm_cookie *scm);
33 extern struct scm_fp_list * scm_fp_dup(struct scm_fp_list *fpl);
35 static __inline__ void scm_destroy(struct scm_cookie *scm)
41 static __inline__ int scm_send(struct socket *sock, struct msghdr *msg,
42 struct scm_cookie *scm)
44 struct task_struct *p = current;
45 scm->creds.uid = p->uid;
46 scm->creds.gid = p->gid;
47 scm->creds.pid = p->tgid;
50 if (msg->msg_controllen <= 0)
52 return __scm_send(sock, msg, scm);
55 #ifdef CONFIG_SECURITY_NETWORK
56 static inline void scm_passec(struct socket *sock, struct msghdr *msg, struct scm_cookie *scm)
58 if (test_bit(SOCK_PASSSEC, &sock->flags) && scm->secdata != NULL)
59 put_cmsg(msg, SOL_SOCKET, SCM_SECURITY, scm->seclen, scm->secdata);
62 static inline void scm_passec(struct socket *sock, struct msghdr *msg, struct scm_cookie *scm)
64 #endif /* CONFIG_SECURITY_NETWORK */
66 static __inline__ void scm_recv(struct socket *sock, struct msghdr *msg,
67 struct scm_cookie *scm, int flags)
69 if (!msg->msg_control)
71 if (test_bit(SOCK_PASSCRED, &sock->flags) || scm->fp)
72 msg->msg_flags |= MSG_CTRUNC;
77 if (test_bit(SOCK_PASSCRED, &sock->flags))
78 put_cmsg(msg, SOL_SOCKET, SCM_CREDENTIALS, sizeof(scm->creds), &scm->creds);
80 scm_passec(sock, msg, scm);
85 scm_detach_fds(msg, scm);
89 #endif /* __LINUX_NET_SCM_H */