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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - include/net/scm.h
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 */