linux/include/net/scm.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_NET_SCM_H
#define __LINUX_NET_SCM_H

#include <linux/limits.h>
#include <linux/net.h>
#include <linux/cred.h>
#include <linux/file.h>
#include <linux/security.h>
#include <linux/pid.h>
#include <linux/nsproxy.h>
#include <linux/sched/signal.h>
#include <net/compat.h>

/* Well, we should have at least one descriptor open
 * to accept passed FDs 8)
 */
#define SCM_MAX_FD …

struct scm_creds { … };

#ifdef CONFIG_UNIX
struct unix_edge;
#endif

struct scm_fp_list { … };

struct scm_cookie { … };

void scm_detach_fds(struct msghdr *msg, struct scm_cookie *scm);
void scm_detach_fds_compat(struct msghdr *msg, struct scm_cookie *scm);
int __scm_send(struct socket *sock, struct msghdr *msg, struct scm_cookie *scm);
void __scm_destroy(struct scm_cookie *scm);
struct scm_fp_list *scm_fp_dup(struct scm_fp_list *fpl);

#ifdef CONFIG_SECURITY_NETWORK
static __inline__ void unix_get_peersec_dgram(struct socket *sock, struct scm_cookie *scm)
{ … }
#else
static __inline__ void unix_get_peersec_dgram(struct socket *sock, struct scm_cookie *scm)
{ }
#endif /* CONFIG_SECURITY_NETWORK */

static __inline__ void scm_set_cred(struct scm_cookie *scm,
				    struct pid *pid, kuid_t uid, kgid_t gid)
{ … }

static __inline__ void scm_destroy_cred(struct scm_cookie *scm)
{ … }

static __inline__ void scm_destroy(struct scm_cookie *scm)
{ … }

static __inline__ int scm_send(struct socket *sock, struct msghdr *msg,
			       struct scm_cookie *scm, bool forcecreds)
{ … }

#ifdef CONFIG_SECURITY_NETWORK
static inline void scm_passec(struct socket *sock, struct msghdr *msg, struct scm_cookie *scm)
{ … }

static inline bool scm_has_secdata(struct socket *sock)
{ … }
#else
static inline void scm_passec(struct socket *sock, struct msghdr *msg, struct scm_cookie *scm)
{ }

static inline bool scm_has_secdata(struct socket *sock)
{
	return false;
}
#endif /* CONFIG_SECURITY_NETWORK */

static __inline__ void scm_pidfd_recv(struct msghdr *msg, struct scm_cookie *scm)
{ … }

static inline bool __scm_recv_common(struct socket *sock, struct msghdr *msg,
				     struct scm_cookie *scm, int flags)
{ … }

static inline void scm_recv(struct socket *sock, struct msghdr *msg,
			    struct scm_cookie *scm, int flags)
{ … }

static inline void scm_recv_unix(struct socket *sock, struct msghdr *msg,
				 struct scm_cookie *scm, int flags)
{ … }

static inline int scm_recv_one_fd(struct file *f, int __user *ufd,
				  unsigned int flags)
{ … }

#endif /* __LINUX_NET_SCM_H */