xnu-7195.60.75.tar.gz

[apple/xnu.git] / bsd / netinet / mp_pcb.h

diff --git a/bsd/netinet/mp_pcb.h b/bsd/netinet/mp_pcb.h
index 3c317a6926eef5aff1f65dcc9cdd280eecc22aad..e2cce3f7b2762be7041b0b7a71777251cb5bd7af 100644 (file)
--- a/bsd/netinet/mp_pcb.h
+++ b/bsd/netinet/mp_pcb.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012-2013 Apple Inc. All rights reserved.
+ * Copyright (c) 2012-2017 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  *
@@ -27,51 +27,78 @@
  */
 
 #ifndef _NETINET_MP_PCB_H_
-#define        _NETINET_MP_PCB_H_
+#define _NETINET_MP_PCB_H_
 
 #ifdef BSD_KERNEL_PRIVATE
+#include <sys/domain.h>
+#include <sys/protosw.h>
+#include <sys/socketvar.h>
 #include <sys/types.h>
 #include <sys/queue.h>
 #include <kern/locks.h>
 
 /* Keep in sync with bsd/dev/dtrace/scripts/mptcp.d */
 typedef enum mppcb_state {
-       MPPCB_STATE_INUSE       = 1,
-       MPPCB_STATE_DEAD        = 2,
+       MPPCB_STATE_INUSE       = 1,
+       MPPCB_STATE_DEAD        = 2,
 } mppcb_state_t;
 
 /*
  * Multipath Protocol Control Block
  */
 struct mppcb {
-       TAILQ_ENTRY(mppcb)      mpp_entry;      /* glue to all PCBs */
-       decl_lck_mtx_data(, mpp_lock);          /* per PCB lock */
-       struct mppcbinfo        *mpp_pcbinfo;   /* PCB info */
-       void                    *mpp_pcbe;      /* ptr to per-protocol ext */
-       struct socket           *mpp_socket;    /* back pointer to socket */
-       uint32_t                mpp_flags;      /* PCB flags */
-       mppcb_state_t           mpp_state;      /* PCB state */
+       TAILQ_ENTRY(mppcb)      mpp_entry;      /* glue to all PCBs */
+       decl_lck_mtx_data(, mpp_lock);          /* per PCB lock */
+       struct mppcbinfo        *mpp_pcbinfo;   /* PCB info */
+       struct mptses           *mpp_pcbe;      /* ptr to MPTCP-session */
+       struct socket           *mpp_socket;    /* back pointer to socket */
+       uint32_t                mpp_flags;      /* PCB flags */
+       mppcb_state_t           mpp_state;      /* PCB state */
+       int32_t                 mpp_inside;     /* Indicates whether or not a thread is processing MPTCP */
+
+#if NECP
+       uuid_t necp_client_uuid;
+       void (*necp_cb)(void *, int, uint32_t, uint32_t, bool *);
+#endif
 };
 
-#define        sotomppcb(so)   ((struct mppcb *)((so)->so_pcb))
+static inline struct mppcb *
+mpsotomppcb(struct socket *mp_so)
+{
+       VERIFY(SOCK_DOM(mp_so) == PF_MULTIPATH);
+       return (struct mppcb *)mp_so->so_pcb;
+}
 
 /* valid values for mpp_flags */
-#define        MPP_ATTACHED    0x1
-#define MPP_DEFUNCT    0x2
+#define MPP_ATTACHED            0x001
+#define MPP_INSIDE_OUTPUT       0x002           /* MPTCP-stack is inside mptcp_subflow_output */
+#define MPP_INSIDE_INPUT        0x004           /* MPTCP-stack is inside mptcp_subflow_input */
+#define MPP_INPUT_HANDLE        0x008           /* MPTCP-stack is handling input */
+#define MPP_WUPCALL             0x010           /* MPTCP-stack is handling a read upcall */
+#define MPP_SHOULD_WORKLOOP     0x020           /* MPTCP-stack should call the workloop function */
+#define MPP_SHOULD_RWAKEUP      0x040           /* MPTCP-stack should call sorwakeup */
+#define MPP_SHOULD_WWAKEUP      0x080           /* MPTCP-stack should call sowwakeup */
+#define MPP_CREATE_SUBFLOWS     0x100           /* This connection needs to create subflows */
+
+static inline boolean_t
+mptcp_should_defer_upcall(struct mppcb *mpp)
+{
+       return !!(mpp->mpp_flags & (MPP_INSIDE_OUTPUT | MPP_INSIDE_INPUT | MPP_INPUT_HANDLE | MPP_WUPCALL));
+}
 
 /*
  * Multipath PCB Information
  */
 struct mppcbinfo {
-       TAILQ_ENTRY(mppcbinfo)  mppi_entry;     /* glue to all PCB info */
-       TAILQ_HEAD(, mppcb)     mppi_pcbs;      /* list of PCBs */
-       uint32_t                mppi_count;     /* # of PCBs in list */
-       struct zone             *mppi_zone;     /* zone for this PCB */
-       uint32_t                mppi_size;      /* size of PCB structure */
-       lck_grp_t               *mppi_lock_grp; /* lock grp */
-       lck_attr_t              *mppi_lock_attr; /* lock attr */
-       lck_grp_attr_t          *mppi_lock_grp_attr; /* lock grp attr */
-       decl_lck_mtx_data(, mppi_lock);         /* global PCB lock */
+       TAILQ_ENTRY(mppcbinfo)  mppi_entry;     /* glue to all PCB info */
+       TAILQ_HEAD(, mppcb)     mppi_pcbs;      /* list of PCBs */
+       uint32_t                mppi_count;     /* # of PCBs in list */
+       struct zone             *mppi_zone;     /* zone for this PCB */
+       uint32_t                mppi_size;      /* size of PCB structure */
+       lck_grp_t               *mppi_lock_grp; /* lock grp */
+       lck_attr_t              *mppi_lock_attr; /* lock attr */
+       lck_grp_attr_t          *mppi_lock_grp_attr; /* lock grp attr */
+       decl_lck_mtx_data(, mppi_lock);         /* global PCB lock */
        uint32_t (*mppi_gc)(struct mppcbinfo *); /* garbage collector func */
        uint32_t (*mppi_timer)(struct mppcbinfo *); /* timer func */
 };
@@ -81,10 +108,17 @@ extern void mp_pcbinit(void);
 extern void mp_pcbinfo_attach(struct mppcbinfo *);
 extern int mp_pcbinfo_detach(struct mppcbinfo *);
 extern int mp_pcballoc(struct socket *, struct mppcbinfo *);
-extern void mp_pcbdetach(struct mppcb *);
+extern void mp_pcbdetach(struct socket *);
 extern void mp_pcbdispose(struct mppcb *);
 extern void mp_gc_sched(void);
 extern void mptcp_timer_sched(void);
+extern void mptcp_handle_deferred_upcalls(struct mppcb *mpp, uint32_t flag);
+extern int mp_getsockaddr(struct socket *mp_so, struct sockaddr **nam);
+extern int mp_getpeeraddr(struct socket *mp_so, struct sockaddr **nam);
+#if NECP
+extern int necp_client_register_multipath_cb(pid_t pid, uuid_t client_id, struct mppcb *mpp);
+extern void necp_mppcb_dispose(struct mppcb *mpp);
+#endif
 __END_DECLS
 
 #endif /* BSD_KERNEL_PRIVATE */