xnu-4570.31.3.tar.gz

[apple/xnu.git] / bsd / net / bpfdesc.h

diff --git a/bsd/net/bpfdesc.h b/bsd/net/bpfdesc.h
index 2a5cd1aafcb2b3202fca971398ae96e56fe1d7b3..dcb9ac0afdbfb2420386e70309dd89a7dc717ff7 100644 (file)
--- a/bsd/net/bpfdesc.h
+++ b/bsd/net/bpfdesc.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2014 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -76,6 +76,7 @@
  */
 
 #include <sys/select.h>
+#include <kern/thread_call.h>
 
 /*
  * Descriptor associated with each open bpf file.
@@ -96,14 +97,18 @@ struct bpf_d {
        caddr_t         bd_fbuf;        /* free slot */
        int             bd_slen;        /* current length of store buffer */
        int             bd_hlen;        /* current length of hold buffer */
+       u_int32_t       bd_scnt;        /* number of packets in store buffer */
+       u_int32_t       bd_hcnt;        /* number of packets in hold buffer */
 
        int             bd_bufsize;     /* absolute length of buffers */
+       int             bd_hbuf_read;   /* reading from hbuf */
+       int             bd_headdrop;    /* Keep newer packets */
 
-       struct bpf_if * bd_bif;         /* interface descriptor */
-       u_int32_t               bd_rtout;       /* Read timeout in 'ticks' */
+       struct bpf_if  *bd_bif;         /* interface descriptor */
+       u_int32_t       bd_rtout;       /* Read timeout in 'ticks' */
        struct bpf_insn *bd_filter;     /* filter code */
-       u_int32_t               bd_rcount;      /* number of packets received */
-       u_int32_t               bd_dcount;      /* number of packets dropped */
+       u_int32_t       bd_rcount;      /* number of packets received */
+       u_int32_t       bd_dcount;      /* number of packets dropped */
 
        u_char          bd_promisc;     /* true if listening promiscuously */
        u_char          bd_state;       /* idle, waiting, or timed out */
@@ -127,11 +132,41 @@ struct bpf_d {
        int             bd_hdrcmplt;    /* false to fill in src lladdr automatically */
        int             bd_seesent;     /* true if bpf should see sent packets */
        int             bd_oflags;      /* device open flags */
+       thread_call_t   bd_thread_call; /* for BPF timeouts with select */
 #if CONFIG_MACF_NET
        struct label *  bd_label;       /* MAC label for descriptor */
 #endif
+       int             bd_traffic_class; /* traffic service class */
+       int             bd_flags;       /* flags */
+
+       int             bd_refcnt;
+#define        BPF_REF_HIST    4               /* how many callers to keep around */
+       void            *bd_ref_lr[BPF_REF_HIST];
+       void            *bd_unref_lr[BPF_REF_HIST];
+       int             bd_next_ref_lr;
+       int             bd_next_unref_lr;
 };
 
+/* Values for bd_state */
+#define BPF_IDLE               0    /* no select in progress or kqueue pending */
+#define BPF_WAITING            1    /* waiting for read timeout in select/kqueue */
+#define BPF_TIMED_OUT  2        /* read timeout has expired in select/kqueue */
+#define BPF_DRAINING   3        /* waiting for timeout routine to finish during close */
+
+/* Test whether a BPF is ready for read(). */
+#define bpf_ready(bd)  ((bd)->bd_hlen != 0 ||          \
+                        (((bd)->bd_immediate || (bd)->bd_state == BPF_TIMED_OUT) && \
+                         (bd)->bd_slen != 0))
+
+/* Values for bd_flags */
+#define        BPF_EXTENDED_HDR        0x01    /* process req. the extended header */
+#define        BPF_WANT_PKTAP          0x02    /* knows how to handle DLT_PKTAP */
+#define        BPF_FINALIZE_PKTAP      0x04    /* finalize pktap header on read */
+#define        BPF_KNOTE               0x08    /* kernel note attached */
+#define        BPF_DETACHING           0x10    /* bpf_d is being detached */
+#define        BPF_DETACHED            0x20    /* bpf_d is detached */
+#define        BPF_CLOSING             0x40    /* bpf_d is being closed */
+
 /*
  * Descriptor associated with each attached hardware interface.
  */
@@ -140,6 +175,7 @@ struct bpf_if {
        struct bpf_d *bif_dlist;        /* descriptor list */
        u_int bif_dlt;                  /* link layer type */
        u_int bif_hdrlen;               /* length of header (with padding) */
+       u_int bif_exthdrlen;            /* length of ext header */
        struct ifnet *bif_ifp;          /* corresponding interface */
        bpf_send_func   bif_send;
        bpf_tap_func    bif_tap;