Root/
1 | #ifndef __LINUX_NET_SCM_H |
2 | #define __LINUX_NET_SCM_H |
3 | |
4 | #include <linux/limits.h> |
5 | #include <linux/net.h> |
6 | #include <linux/security.h> |
7 | #include <linux/pid.h> |
8 | #include <linux/nsproxy.h> |
9 | |
10 | /* Well, we should have at least one descriptor open |
11 | * to accept passed FDs 8) |
12 | */ |
13 | #define SCM_MAX_FD 255 |
14 | |
15 | struct scm_fp_list { |
16 | struct list_head list; |
17 | int count; |
18 | struct file *fp[SCM_MAX_FD]; |
19 | }; |
20 | |
21 | struct scm_cookie { |
22 | struct ucred creds; /* Skb credentials */ |
23 | struct scm_fp_list *fp; /* Passed files */ |
24 | #ifdef CONFIG_SECURITY_NETWORK |
25 | u32 secid; /* Passed security ID */ |
26 | #endif |
27 | }; |
28 | |
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); |
34 | |
35 | #ifdef CONFIG_SECURITY_NETWORK |
36 | static __inline__ void unix_get_peersec_dgram(struct socket *sock, struct scm_cookie *scm) |
37 | { |
38 | security_socket_getpeersec_dgram(sock, NULL, &scm->secid); |
39 | } |
40 | #else |
41 | static __inline__ void unix_get_peersec_dgram(struct socket *sock, struct scm_cookie *scm) |
42 | { } |
43 | #endif /* CONFIG_SECURITY_NETWORK */ |
44 | |
45 | static __inline__ void scm_destroy(struct scm_cookie *scm) |
46 | { |
47 | if (scm && scm->fp) |
48 | __scm_destroy(scm); |
49 | } |
50 | |
51 | static __inline__ int scm_send(struct socket *sock, struct msghdr *msg, |
52 | struct scm_cookie *scm) |
53 | { |
54 | struct task_struct *p = current; |
55 | scm->creds.uid = current_uid(); |
56 | scm->creds.gid = current_gid(); |
57 | scm->creds.pid = task_tgid_vnr(p); |
58 | scm->fp = NULL; |
59 | unix_get_peersec_dgram(sock, scm); |
60 | if (msg->msg_controllen <= 0) |
61 | return 0; |
62 | return __scm_send(sock, msg, scm); |
63 | } |
64 | |
65 | #ifdef CONFIG_SECURITY_NETWORK |
66 | static inline void scm_passec(struct socket *sock, struct msghdr *msg, struct scm_cookie *scm) |
67 | { |
68 | char *secdata; |
69 | u32 seclen; |
70 | int err; |
71 | |
72 | if (test_bit(SOCK_PASSSEC, &sock->flags)) { |
73 | err = security_secid_to_secctx(scm->secid, &secdata, &seclen); |
74 | |
75 | if (!err) { |
76 | put_cmsg(msg, SOL_SOCKET, SCM_SECURITY, seclen, secdata); |
77 | security_release_secctx(secdata, seclen); |
78 | } |
79 | } |
80 | } |
81 | #else |
82 | static inline void scm_passec(struct socket *sock, struct msghdr *msg, struct scm_cookie *scm) |
83 | { } |
84 | #endif /* CONFIG_SECURITY_NETWORK */ |
85 | |
86 | static __inline__ void scm_recv(struct socket *sock, struct msghdr *msg, |
87 | struct scm_cookie *scm, int flags) |
88 | { |
89 | if (!msg->msg_control) { |
90 | if (test_bit(SOCK_PASSCRED, &sock->flags) || scm->fp) |
91 | msg->msg_flags |= MSG_CTRUNC; |
92 | scm_destroy(scm); |
93 | return; |
94 | } |
95 | |
96 | if (test_bit(SOCK_PASSCRED, &sock->flags)) |
97 | put_cmsg(msg, SOL_SOCKET, SCM_CREDENTIALS, sizeof(scm->creds), &scm->creds); |
98 | |
99 | scm_passec(sock, msg, scm); |
100 | |
101 | if (!scm->fp) |
102 | return; |
103 | |
104 | scm_detach_fds(msg, scm); |
105 | } |
106 | |
107 | |
108 | #endif /* __LINUX_NET_SCM_H */ |
109 | |
110 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9