211 lines
7.5 KiB
D
211 lines
7.5 KiB
D
/*
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* Copyright (c) 2016 George V. Neville-Neil
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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* Translators and flags for the mbuf structure. FreeBSD specific code.
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*
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*/
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#pragma D depends_on module kernel
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/*
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* mbuf flags of global significance and layer crossing.
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* Those of only protocol/layer specific significance are to be mapped
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* to M_PROTO[1-12] and cleared at layer handoff boundaries.
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* NB: Limited to the lower 24 bits.
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*/
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#pragma D binding "1.6.3" M_EXT
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inline int M_EXT = 0x00000001; /* has associated external storage */
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#pragma D binding "1.6.3" M_PKTHDR
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inline int M_PKTHDR = 0x00000002; /* start of record */
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#pragma D binding "1.6.3" M_EOR
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inline int M_EOR = 0x00000004; /* end of record */
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#pragma D binding "1.6.3" M_RDONLY
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inline int M_RDONLY = 0x00000008; /* associated data is marked read-only */
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#pragma D binding "1.6.3" M_BCAST
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inline int M_BCAST = 0x00000010; /* send/received as link-level broadcast */
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#pragma D binding "1.6.3" M_MCAST
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inline int M_MCAST = 0x00000020; /* send/received as link-level multicast */
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#pragma D binding "1.6.3" M_PROMISC
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inline int M_PROMISC = 0x00000040; /* packet was not for us */
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#pragma D binding "1.6.3" M_VLANTAG
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inline int M_VLANTAG = 0x00000080; /* ether_vtag is valid */
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#pragma D binding "1.6.3" M_UNUSED_8
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inline int M_UNUSED_8 = 0x00000100; /* --available-- */
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#pragma D binding "1.6.3" M_NOFREE
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inline int M_NOFREE = 0x00000200; /* do not free mbuf, embedded in cluster */
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#pragma D binding "1.6.3" M_PROTO1
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inline int M_PROTO1 = 0x00001000; /* protocol-specific */
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#pragma D binding "1.6.3" M_PROTO2
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inline int M_PROTO2 = 0x00002000; /* protocol-specific */
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#pragma D binding "1.6.3" M_PROTO3
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inline int M_PROTO3 = 0x00004000; /* protocol-specific */
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#pragma D binding "1.6.3" M_PROTO4
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inline int M_PROTO4 = 0x00008000; /* protocol-specific */
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#pragma D binding "1.6.3" M_PROTO5
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inline int M_PROTO5 = 0x00010000; /* protocol-specific */
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#pragma D binding "1.6.3" M_PROTO6
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inline int M_PROTO6 = 0x00020000; /* protocol-specific */
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#pragma D binding "1.6.3" M_PROTO7
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inline int M_PROTO7 = 0x00040000; /* protocol-specific */
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#pragma D binding "1.6.3" M_PROTO8
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inline int M_PROTO8 = 0x00080000; /* protocol-specific */
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#pragma D binding "1.6.3" M_PROTO9
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inline int M_PROTO9 = 0x00100000; /* protocol-specific */
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#pragma D binding "1.6.3" M_PROTO10
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inline int M_PROTO10 = 0x00200000; /* protocol-specific */
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#pragma D binding "1.6.3" M_PROTO11
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inline int M_PROTO11 = 0x00400000; /* protocol-specific */
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#pragma D binding "1.6.3" M_PROTO12
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inline int M_PROTO12 = 0x00800000; /* protocol-specific */
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#pragma D binding "1.6.3" mbufflags_string
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inline string mbufflags_string[uint32_t flags] =
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flags & M_EXT ? "M_EXT" :
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flags & M_PKTHDR ? "M_PKTHDR" :
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flags & M_EOR ? "M_EOR" :
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flags & M_RDONLY ? "M_RDONLY" :
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flags & M_BCAST ? "M_BCAST" :
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flags & M_MCAST ? "M_MCAST" :
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flags & M_PROMISC ? "M_PROMISC" :
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flags & M_VLANTAG ? "M_VLANTAG" :
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flags & M_UNUSED_8 ? "M_UNUSED_8" :
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flags & M_NOFREE ? "M_NOFREE" :
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flags & M_PROTO1 ? "M_PROTO1" :
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flags & M_PROTO2 ? "M_PROTO2" :
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flags & M_PROTO3 ? "M_PROTO3" :
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flags & M_PROTO4 ? "M_PROTO4" :
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flags & M_PROTO5 ? "M_PROTO5" :
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flags & M_PROTO6 ? "M_PROTO6" :
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flags & M_PROTO7 ? "M_PROTO7" :
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flags & M_PROTO8 ? "M_PROTO8" :
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flags & M_PROTO9 ? "M_PROTO9" :
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flags & M_PROTO10 ? "M_PROTO10" :
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flags & M_PROTO11 ? "M_PROTO11" :
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flags & M_PROTO12 ? "M_PROTO12" :
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"none" ;
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/*
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* Packet tag structure (see below for details).
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*/
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typedef struct m_tag {
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u_int16_t m_tag_id; /* Tag ID */
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u_int16_t m_tag_len; /* Length of data */
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u_int32_t m_tag_cookie; /* ABI/Module ID */
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} m_tag_t;
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/*
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* Record/packet header in first mbuf of chain; valid only if M_PKTHDR is set.
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* Size ILP32: 48
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* LP64: 56
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* Compile-time assertions in uipc_mbuf.c test these values to ensure that
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* they are correct.
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*/
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typedef struct pkthdr {
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/* struct ifnet *rcvif; */ /* rcv interface */
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int32_t len; /* total packet length */
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/* Layer crossing persistent information. */
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uint32_t flowid; /* packet's 4-tuple system */
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uint64_t csum_flags; /* checksum and offload features */
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uint16_t fibnum; /* this packet should use this fib */
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uint8_t cosqos; /* class/quality of service */
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uint8_t rsstype; /* hash type */
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} pkthdr_t;
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/*
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* Description of external storage mapped into mbuf; valid only if M_EXT is
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* set.
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* Size ILP32: 28
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* LP64: 48
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* Compile-time assertions in uipc_mbuf.c test these values to ensure that
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* they are correct.
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*/
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typedef struct m_ext {
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volatile u_int *ext_cnt; /* pointer to ref count info */
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caddr_t ext_buf; /* start of buffer */
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uint32_t ext_size; /* size of buffer, for ext_free */
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uint32_t ext_type:8, /* type of external storage */
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ext_flags:24; /* external storage mbuf flags */
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void *ext_arg1; /* optional argument pointer */
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void *ext_arg2; /* optional argument pointer */
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} m_ext_t;
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/*
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* The core of the mbuf object along with some shortcut defines for practical
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* purposes.
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*/
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struct mbuf {
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uintptr_t mbuf_addr;
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/*
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* Header present at the beginning of every mbuf.
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* Size ILP32: 24
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* LP64: 32
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* Compile-time assertions in uipc_mbuf.c test these values to ensure
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* that they are correct.
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*/
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caddr_t m_data; /* location of data */
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int32_t m_len; /* amount of data in this mbuf */
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uint32_t m_type:8, /* type of data in this mbuf */
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m_flags:24; /* flags; see below */
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/*
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* A set of optional headers (packet header, external storage header)
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* and internal data storage. Historically, these arrays were sized
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* to MHLEN (space left after a packet header) and MLEN (space left
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* after only a regular mbuf header); they are now variable size in
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* order to support future work on variable-size mbufs.
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*/
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/* union { */
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/* struct { */
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/* struct pkthdr m_pkthdr; */
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/* union { */
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/* struct m_ext m_ext; */
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/* char m_pktdat[0]; */
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/* }; */
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/* }; */
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/* char m_dat[0]; */
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/* }; */
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char *m_dat;
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};
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typedef struct mbufinfo {
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uintptr_t mbuf_addr;
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caddr_t m_data;
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int32_t m_len;
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uint8_t m_type;
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uint32_t m_flags;
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} mbufinfo_t;
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translator mbufinfo_t < struct mbuf *p > {
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mbuf_addr = (uintptr_t)p;
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m_data = p->m_data;
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m_len = p->m_len;
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m_type = p->m_type & 0xff000000;
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m_flags = p->m_type & 0x00ffffff;
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};
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