xnu-6153.141.1.tar.gz

[apple/xnu.git] / bsd / sys / mbuf.h

diff --git a/bsd/sys/mbuf.h b/bsd/sys/mbuf.h
index afa2424a8107885a81763e3246f3bf30078fb44d..ff2653d9641c2478a9acf679a501be764c15bd08 100644 (file)
--- a/bsd/sys/mbuf.h
+++ b/bsd/sys/mbuf.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999-2018 Apple Inc. All rights reserved.
+ * Copyright (c) 1999-2019 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  *
@@ -210,6 +210,8 @@ struct m_drvaux_tag {
 #define PF_TAG_HDR_INET                 0x8     /* hdr points to IPv4 */
 #define PF_TAG_HDR_INET6                0x10    /* hdr points to IPv6 */
 #endif /* PF_ECN */
+#define PF_TAG_REASSEMBLED              0x20    /* pkt reassembled by PF */
+#define PF_TAG_REFRAGMENTED             0x40    /* pkt refragmented by PF */
 /*
  * PF mbuf tag
  */
@@ -223,6 +225,17 @@ struct pf_mtag {
 #endif /* PF_ECN */
 };
 
+/*
+ * PF fragment tag
+ */
+struct pf_fragment_tag {
+       uint32_t ft_id;     /* fragment id */
+       uint16_t ft_hdrlen; /* header length of reassembled pkt */
+       uint16_t ft_unfragpartlen; /* length of the per-fragment headers */
+       uint16_t ft_extoff; /* last extension header offset or 0 */
+       uint16_t ft_maxlen; /* maximum fragment payload length */
+};
+
 /*
  * TCP mbuf tag
  */
@@ -311,7 +324,7 @@ struct driver_mtag_ {
  * Protocol specific mbuf tag (at most one protocol metadata per mbuf).
  *
  * Care must be taken to ensure that they are mutually exclusive, e.g.
- * IPSec policy ID implies no TCP segment offload (which is fine given
+ * IPsec policy ID implies no TCP segment offload (which is fine given
  * that the former is used on the virtual ipsec interface that does
  * not advertise the TSO capability.)
  */
@@ -433,7 +446,7 @@ struct pkthdr {
 #define bufstatus_if    _pkt_bsr.if_data
 #define bufstatus_sndbuf        _pkt_bsr.sndbuf_data
        };
-       u_int64_t pkt_timestamp;        /* enqueue time */
+       u_int64_t pkt_timestamp;        /* TX: enqueue time, RX: receive timestamp */
 
        /*
         * Tags (external and built-in)
@@ -481,6 +494,20 @@ struct pkthdr {
 #define FLOWSRC_PF              3       /* flow ID generated by PF */
 #define FLOWSRC_CHANNEL         4       /* flow ID generated by channel */
 
+/*
+ * FLOWSRC_MPKL_INPUT is not a true flow data source and is used for
+ * multi-layer packet logging. We're usurping the pkt_flowsrc field because
+ * the mbuf packet header ran out of space and pkt_flowsrc is normally
+ * used on output so we assume we can safely overwrite the normal semantic of
+ * the field.
+ * This value is meant to be used on incoming packet from a lower level protocol
+ * to pass information to some upper level protocol. When FLOWSRC_MPKL_INPUT
+ * is set, the following fields are used:
+ * - pkt_proto: the IP protocol ID of the lower level protocol
+ * - pkt_flowid: the identifier of the packet at the lower protocol.
+ * For example ESP would set pkt_proto to IPPROTO_ESP and pkt_flowid to the SPI.
+ */
+
 /*
  * Packet flags.  Unlike m_flags, all packet flags are copied along when
  * copying m_pkthdr, i.e. no equivalent of M_COPYFLAGS here.  These flags
@@ -660,11 +687,14 @@ struct mbuf {
  */
 
 /* VLAN tag present */
-#define CSUM_VLAN_TAG_VALID     0x10000         /* vlan_tag field is valid */
+#define CSUM_VLAN_TAG_VALID     0x00010000      /* vlan_tag field is valid */
+
+/* checksum start adjustment has been done */
+#define CSUM_ADJUST_DONE        0x00020000
 
 /* TCP Segment Offloading requested on this mbuf */
-#define CSUM_TSO_IPV4           0x100000        /* This mbuf needs to be segmented by the NIC */
-#define CSUM_TSO_IPV6           0x200000        /* This mbuf needs to be segmented by the NIC */
+#define CSUM_TSO_IPV4           0x00100000      /* This mbuf needs to be segmented by the NIC */
+#define CSUM_TSO_IPV6           0x00200000      /* This mbuf needs to be segmented by the NIC */
 
 #define TSO_IPV4_OK(_ifp, _m)                                           \
     (((_ifp)->if_hwassist & IFNET_TSO_IPV4) &&                          \
@@ -1017,7 +1047,7 @@ struct name {                                                   \
 #define MBUFQ_LAST(head)                                        \
        (((head)->mq_last == &MBUFQ_FIRST(head)) ? NULL :       \
        ((struct mbuf *)(void *)((char *)(head)->mq_last -      \
-           (size_t)(&MBUFQ_NEXT((struct mbuf *)0)))))
+            __builtin_offsetof(struct mbuf, m_nextpkt))))
 
 #define max_linkhdr     P2ROUNDUP(_max_linkhdr, sizeof (u_int32_t))
 #define max_protohdr    P2ROUNDUP(_max_protohdr, sizeof (u_int32_t))
@@ -1228,7 +1258,7 @@ struct mbuf;
 #define M_COPYM_MUST_COPY_HDR   3       /* MUST copy pkthdr from old to new */
 #define M_COPYM_MUST_MOVE_HDR   4       /* MUST move pkthdr from old to new */
 
-extern void m_freem(struct mbuf *);
+extern void m_freem(struct mbuf *) __XNU_INTERNAL(m_freem);
 extern u_int64_t mcl_to_paddr(char *);
 extern void m_adj(struct mbuf *, int);
 extern void m_cat(struct mbuf *, struct mbuf *);
@@ -1379,7 +1409,7 @@ __private_extern__ caddr_t m_16kalloc(int);
 __private_extern__ void m_16kfree(caddr_t, u_int, caddr_t);
 __private_extern__ struct mbuf *m_m16kget(struct mbuf *, int);
 __private_extern__ int m_reinit(struct mbuf *, int);
-__private_extern__ struct mbuf *m_free(struct mbuf *);
+__private_extern__ struct mbuf *m_free(struct mbuf *) __XNU_INTERNAL(m_free);
 __private_extern__ struct mbuf *m_getclr(int, int);
 __private_extern__ struct mbuf *m_getptr(struct mbuf *, int, int *);
 __private_extern__ unsigned int m_length(struct mbuf *);
@@ -1478,6 +1508,7 @@ enum {
        KERNEL_TAG_TYPE_IPSEC                   = 10,
        KERNEL_TAG_TYPE_DRVAUX                  = 11,
        KERNEL_TAG_TYPE_CFIL_UDP                = 13,
+       KERNEL_TAG_TYPE_PF_REASS                = 14,
 };
 
 /* Packet tag routines */