rtems/rtems-libbsd
1
0
Fork 0
mirror of https://git.rtems.org/rtems-libbsd/ synced 2025-10-14 10:27:12 +08:00
Code Issues Packages Projects Releases Wiki Activity

Update to FreeBSD head 2016-08-23

Browse Source 
Git mirror commit 9fe7c416e6abb28b1398fd3e5687099846800cfd.
This commit is contained in:
Sebastian Huber
2016-10-07 15:10:20 +02:00
parent 8c0eebac7d
commit c40e45b75e
1040 changed files with 156866 additions and 67039 deletions
Download Patch File Download Diff File Expand all files Collapse all files

109
freebsd/sys/net/pfil.h
View File

@@ -43,15 +43,18 @@ struct mbuf;
struct ifnet;
struct inpcb;
typedef int (*pfil_func_t)(void *, struct mbuf **, struct ifnet *, int,
struct inpcb *);
/*
* The packet filter hooks are designed for anything to call them to
* possibly intercept the packet.
* possibly intercept the packet. Multiple filter hooks are chained
* together and after each other in the specified order.
*/
struct packet_filter_hook {
TAILQ_ENTRY(packet_filter_hook) pfil_link;
int (*pfil_func)(void *, struct mbuf **, struct ifnet *, int,
struct inpcb *);
void *pfil_arg;
TAILQ_ENTRY(packet_filter_hook) pfil_chain;
pfil_func_t pfil_func;
void *pfil_arg;
};
#define PFIL_IN 0x00000001
@@ -59,63 +62,87 @@ struct packet_filter_hook {
#define PFIL_WAITOK 0x00000004
#define PFIL_ALL (PFIL_IN|PFIL_OUT)
typedef TAILQ_HEAD(pfil_list, packet_filter_hook) pfil_list_t;
typedef TAILQ_HEAD(pfil_chain, packet_filter_hook) pfil_chain_t;
#define PFIL_TYPE_AF 1 /* key is AF_* type */
#define PFIL_TYPE_IFNET 2 /* key is ifnet pointer */
#define PFIL_FLAG_PRIVATE_LOCK 0x01 /* Personal lock instead of global */
/*
* A pfil head is created by each protocol or packet intercept point.
* For packet is then run through the hook chain for inspection.
*/
struct pfil_head {
pfil_list_t ph_in;
pfil_list_t ph_out;
int ph_type;
int ph_nhooks;
pfil_chain_t ph_in;
pfil_chain_t ph_out;
int ph_type;
int ph_nhooks;
#if defined( __linux__ ) || defined( _WIN32 )
rwlock_t ph_mtx;
rwlock_t ph_mtx;
#else
struct rmlock ph_lock;
struct rmlock *ph_plock; /* Pointer to the used lock */
struct rmlock ph_lock; /* Private lock storage */
int flags;
#endif
union {
u_long phu_val;
void *phu_ptr;
u_long phu_val;
void *phu_ptr;
} ph_un;
#define ph_af ph_un.phu_val
#define ph_ifnet ph_un.phu_ptr
#define ph_af ph_un.phu_val
#define ph_ifnet ph_un.phu_ptr
LIST_ENTRY(pfil_head) ph_list;
};
int pfil_add_hook(int (*func)(void *, struct mbuf **, struct ifnet *,
int, struct inpcb *), void *, int, struct pfil_head *);
int pfil_remove_hook(int (*func)(void *, struct mbuf **, struct ifnet *,
int, struct inpcb *), void *, int, struct pfil_head *);
/* Public functions for pfil hook management by packet filters. */
struct pfil_head *pfil_head_get(int, u_long);
int pfil_add_hook(pfil_func_t, void *, int, struct pfil_head *);
int pfil_remove_hook(pfil_func_t, void *, int, struct pfil_head *);
#define PFIL_HOOKED(p) ((p)->ph_nhooks > 0)
/* Public functions to run the packet inspection by protocols. */
int pfil_run_hooks(struct pfil_head *, struct mbuf **, struct ifnet *,
int, struct inpcb *inp);
/* Public functions for pfil head management by protocols. */
int pfil_head_register(struct pfil_head *);
int pfil_head_unregister(struct pfil_head *);
struct pfil_head *pfil_head_get(int, u_long);
/* Public pfil locking functions for self managed locks by packet filters. */
struct rm_priotracker; /* Do not require including rmlock header */
int pfil_try_rlock(struct pfil_head *, struct rm_priotracker *);
void pfil_rlock(struct pfil_head *, struct rm_priotracker *);
void pfil_runlock(struct pfil_head *, struct rm_priotracker *);
void pfil_wlock(struct pfil_head *);
void pfil_wunlock(struct pfil_head *);
int pfil_wowned(struct pfil_head *ph);
#define PFIL_HOOKED(p) ((p)->ph_nhooks > 0)
#define PFIL_LOCK_INIT(p) \
rm_init_flags(&(p)->ph_lock, "PFil hook read/write mutex", RM_RECURSE)
#define PFIL_LOCK_DESTROY(p) rm_destroy(&(p)->ph_lock)
#define PFIL_RLOCK(p, t) rm_rlock(&(p)->ph_lock, (t))
#define PFIL_WLOCK(p) rm_wlock(&(p)->ph_lock)
#define PFIL_RUNLOCK(p, t) rm_runlock(&(p)->ph_lock, (t))
#define PFIL_WUNLOCK(p) rm_wunlock(&(p)->ph_lock)
#define PFIL_LIST_LOCK() mtx_lock(&pfil_global_lock)
#define PFIL_LIST_UNLOCK() mtx_unlock(&pfil_global_lock)
/* Internal pfil locking functions. */
#define PFIL_LOCK_INIT_REAL(l, t) \
rm_init_flags(l, "PFil " t " rmlock", RM_RECURSE)
#define PFIL_LOCK_DESTROY_REAL(l) \
rm_destroy(l)
#define PFIL_LOCK_INIT(p) do { \
if ((p)->flags & PFIL_FLAG_PRIVATE_LOCK) { \
PFIL_LOCK_INIT_REAL(&(p)->ph_lock, "private"); \
(p)->ph_plock = &(p)->ph_lock; \
} else \
(p)->ph_plock = &V_pfil_lock; \
} while (0)
#define PFIL_LOCK_DESTROY(p) do { \
if ((p)->flags & PFIL_FLAG_PRIVATE_LOCK) \
PFIL_LOCK_DESTROY_REAL((p)->ph_plock); \
} while (0)
static __inline struct packet_filter_hook *
pfil_hook_get(int dir, struct pfil_head *ph)
{
#define PFIL_TRY_RLOCK(p, t) rm_try_rlock((p)->ph_plock, (t))
#define PFIL_RLOCK(p, t) rm_rlock((p)->ph_plock, (t))
#define PFIL_WLOCK(p) rm_wlock((p)->ph_plock)
#define PFIL_RUNLOCK(p, t) rm_runlock((p)->ph_plock, (t))
#define PFIL_WUNLOCK(p) rm_wunlock((p)->ph_plock)
#define PFIL_WOWNED(p) rm_wowned((p)->ph_plock)
if (dir == PFIL_IN)
return (TAILQ_FIRST(&ph->ph_in));
else if (dir == PFIL_OUT)
return (TAILQ_FIRST(&ph->ph_out));
else
return (NULL);
}
/* Internal locking macros for global/vnet pfil_head_list. */
#define PFIL_HEADLIST_LOCK() mtx_lock(&pfil_global_lock)
#define PFIL_HEADLIST_UNLOCK() mtx_unlock(&pfil_global_lock)
#endif /* _NET_PFIL_H_ */