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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/net/scm.h | |
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Linux-2.6.12-rc2
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!
Diffstat (limited to 'include/net/scm.h')
-rw-r--r-- | include/net/scm.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/include/net/scm.h b/include/net/scm.h new file mode 100644 index 0000000..c3fa3d5 --- /dev/null +++ b/include/net/scm.h @@ -0,0 +1,71 @@ +#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 */ + |