diff options
| -rw-r--r-- | sys/sys/mbuf.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/sys/sys/mbuf.h b/sys/sys/mbuf.h index 5cfb1ae..dec48ec 100644 --- a/sys/sys/mbuf.h +++ b/sys/sys/mbuf.h @@ -410,6 +410,54 @@ struct mauxtag { void *p; }; +/* + * Some packet tags to identify different mbuf annotations. + * + * Eventually, these annotations will end up in an appropriate chain + * (struct m_tag or similar, e.g. as in NetBSD) properly managed by + * the mbuf handling routines. + * + * As a temporary and low impact solution to replace the even uglier + * approach used so far in some parts of the network stack (which relies + * on global variables), these annotations are stored in MT_CONTROL + * mbufs (or lookalikes) prepended to the actual mbuf chain. + * + * m_type = MT_CONTROL + * m_flags = m_tag_id + * m_next = next buffer in chain. + * + * BE VERY CAREFUL not to pass these blocks to the mbuf handling routines. + * + */ + +#define m_tag_id m_hdr.mh_flags + +/* Packet tag types -- first ones are from NetBSD */ + +#define PACKET_TAG_NONE 0 /* Nadda */ +#define PACKET_TAG_IPSEC_IN_DONE 1 /* IPsec applied, in */ +#define PACKET_TAG_IPSEC_OUT_DONE 2 /* IPsec applied, out */ +#define PACKET_TAG_IPSEC_IN_CRYPTO_DONE 3 /* NIC IPsec crypto done */ +#define PACKET_TAG_IPSEC_OUT_CRYPTO_NEEDED 4 /* NIC IPsec crypto req'ed */ +#define PACKET_TAG_IPSEC_IN_COULD_DO_CRYPTO 5 /* NIC notifies IPsec */ +#define PACKET_TAG_IPSEC_PENDING_TDB 6 /* Reminder to do IPsec */ +#define PACKET_TAG_BRIDGE 7 /* Bridge processing done */ +#define PACKET_TAG_GIF 8 /* GIF processing done */ +#define PACKET_TAG_GRE 9 /* GRE processing done */ +#define PACKET_TAG_IN_PACKET_CHECKSUM 10 /* NIC checksumming done */ +#define PACKET_TAG_ENCAP 11 /* Encap. processing */ +#define PACKET_TAG_IPSEC_SOCKET 12 /* IPSEC socket ref */ +#define PACKET_TAG_IPSEC_HISTORY 13 /* IPSEC history */ +#define PACKET_TAG_IPV6_INPUT 14 /* IPV6 input processing */ + +/* Packet tags used in the FreeBSD network stack */ +#define PACKET_TAG_DUMMYNET 15 /* dummynet info */ +#define PACKET_TAG_IPFW 16 /* ipfw classification */ +#define PACKET_TAG_DIVERT 17 /* divert info */ +#define PACKET_TAG_IPFORWARD 18 /* ipforward info */ + +#define PACKET_TAG_MAX 19 + extern int max_datalen; /* MHLEN - max_hdr */ extern int max_hdr; /* largest link + protocol header */ extern int max_linkhdr; /* largest link-level header */ |
