mirror of
https://github.com/torvalds/linux.git
synced 2024-11-05 03:21:32 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
#ifndef __LINUX_NET_SCM_H
|
|
#define __LINUX_NET_SCM_H
|
|
|
|
#include <linux/limits.h>
|
|
#include <linux/net.h>
|
|
|
|
/* Well, we should have at least one descriptor open
|
|
* to accept passed FDs 8)
|
|
*/
|
|
#define SCM_MAX_FD (OPEN_MAX-1)
|
|
|
|
struct scm_fp_list
|
|
{
|
|
int count;
|
|
struct file *fp[SCM_MAX_FD];
|
|
};
|
|
|
|
struct scm_cookie
|
|
{
|
|
struct ucred creds; /* Skb credentials */
|
|
struct scm_fp_list *fp; /* Passed files */
|
|
unsigned long seq; /* Connection seqno */
|
|
};
|
|
|
|
extern void scm_detach_fds(struct msghdr *msg, struct scm_cookie *scm);
|
|
extern void scm_detach_fds_compat(struct msghdr *msg, struct scm_cookie *scm);
|
|
extern int __scm_send(struct socket *sock, struct msghdr *msg, struct scm_cookie *scm);
|
|
extern void __scm_destroy(struct scm_cookie *scm);
|
|
extern struct scm_fp_list * scm_fp_dup(struct scm_fp_list *fpl);
|
|
|
|
static __inline__ void scm_destroy(struct scm_cookie *scm)
|
|
{
|
|
if (scm && scm->fp)
|
|
__scm_destroy(scm);
|
|
}
|
|
|
|
static __inline__ int scm_send(struct socket *sock, struct msghdr *msg,
|
|
struct scm_cookie *scm)
|
|
{
|
|
memset(scm, 0, sizeof(*scm));
|
|
scm->creds.uid = current->uid;
|
|
scm->creds.gid = current->gid;
|
|
scm->creds.pid = current->tgid;
|
|
if (msg->msg_controllen <= 0)
|
|
return 0;
|
|
return __scm_send(sock, msg, scm);
|
|
}
|
|
|
|
static __inline__ void scm_recv(struct socket *sock, struct msghdr *msg,
|
|
struct scm_cookie *scm, int flags)
|
|
{
|
|
if (!msg->msg_control)
|
|
{
|
|
if (test_bit(SOCK_PASSCRED, &sock->flags) || scm->fp)
|
|
msg->msg_flags |= MSG_CTRUNC;
|
|
scm_destroy(scm);
|
|
return;
|
|
}
|
|
|
|
if (test_bit(SOCK_PASSCRED, &sock->flags))
|
|
put_cmsg(msg, SOL_SOCKET, SCM_CREDENTIALS, sizeof(scm->creds), &scm->creds);
|
|
|
|
if (!scm->fp)
|
|
return;
|
|
|
|
scm_detach_fds(msg, scm);
|
|
}
|
|
|
|
|
|
#endif /* __LINUX_NET_SCM_H */
|
|
|