--- /dev/null
+/*
+ * Copyright (C) 2009 Luigi Rizzo, Universita` di Pisa
+ *
+ * BSD copyright.
+ *
+ * A simple compatibility interface to map mbufs onto sk_buff
+ */
+
+#ifndef _SYS_MBUF_H_
+#define _SYS_MBUF_H_
+
+#include <sys/malloc.h> /* we use free() */
+/* hopefully queue.h is already included by someone else */
+#include <sys/queue.h>
+#ifdef _KERNEL
+
+/* bzero not present on linux, but this should go in glue.h */
+// #define bzero(s, n) memset(s, 0, n)
+
+/*
+ * We implement a very simplified UMA allocator where the backend
+ * is simply malloc, and uma_zone only stores the length of the components.
+ */
+typedef int uma_zone_t; /* the zone size */
+
+#define uma_zcreate(name, len, _3, _4, _5, _6, _7, _8) (len)
+
+
+#define uma_zfree(zone, item) free(item, M_IPFW)
+#define uma_zalloc(zone, flags) malloc(zone, M_IPFW, flags)
+#define uma_zdestroy(zone) do {} while (0)
+
+/*-
+ * Macros for type conversion:
+ * mtod(m, t) -- Convert mbuf pointer to data pointer of correct type.
+ */
+#define mtod(m, t) ((t)((m)->m_data))
+
+#endif /* _KERNEL */
+
+/*
+ * Packet tag structure (see below for details).
+ */
+struct m_tag {
+ SLIST_ENTRY(m_tag) m_tag_link; /* List of packet tags */
+ u_int16_t m_tag_id; /* Tag ID */
+ u_int16_t m_tag_len; /* Length of data */
+ u_int32_t m_tag_cookie; /* ABI/Module ID */
+ void (*m_tag_free)(struct m_tag *);
+};
+
+#if defined(__linux__) || defined( _WIN32 )
+
+/*
+ * Auxiliary structure to store values from the sk_buf.
+ * Note that we should not alter the sk_buff, and if we do
+ * so make sure to keep the values in sync between the mbuf
+ * and the sk_buff (especially m_len and m_pkthdr.len).
+ */
+
+struct mbuf {
+ struct mbuf *m_next;
+ struct mbuf *m_nextpkt;
+ void *m_data;
+ int m_len; /* length in this mbuf */
+ int m_flags;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
+ struct nf_info *queue_entry;
+#else
+ struct nf_queue_entry *queue_entry;
+#endif
+ struct sk_buff *m_skb;
+ struct {
+ struct net_device *rcvif;
+ int len; /* total packet len */
+ SLIST_HEAD (packet_tags, m_tag) tags;
+ } m_pkthdr;
+};
+
+#define M_SKIP_FIREWALL 0x01 /* skip firewall processing */
+#define M_BCAST 0x02 /* send/received as link-level broadcast */
+#define M_MCAST 0x04 /* send/received as link-level multicast */
+
+#define M_DONTWAIT M_NOWAIT /* should not be here... */
+
+
+/*
+ * m_dup() is used in the TEE case, currently unsupported so we
+ * just return.
+ */
+static __inline struct mbuf *m_dup(struct mbuf __unused *m, int __unused n)
+{
+ return NULL;
+};
+
+#define MTAG_ABI_COMPAT 0 /* compatibility ABI */
+static __inline struct m_tag *
+m_tag_find(struct mbuf __unused *m, int __unused type, struct m_tag __unused *start)
+{
+ return NULL;
+};
+
+
+static __inline void
+m_tag_prepend(struct mbuf *m, struct m_tag *t)
+{
+ SLIST_INSERT_HEAD(&m->m_pkthdr.tags, t, m_tag_link);
+}
+
+/*
+ * Return the next tag in the list of tags associated with an mbuf.
+ */
+static __inline struct m_tag *
+m_tag_next(struct mbuf *m, struct m_tag *t)
+{
+
+ return (SLIST_NEXT(t, m_tag_link));
+}
+
+/*
+ * Create an mtag of the given type
+ */
+static __inline struct m_tag *
+m_tag_alloc(uint32_t cookie, int type, int length, int wait)
+{
+ int l = length + sizeof(struct m_tag);
+ struct m_tag *m = malloc(l, 0, M_NOWAIT);
+ if (m) {
+ memset(m, 0, l);
+ m->m_tag_id = type;
+ m->m_tag_len = length;
+ m->m_tag_cookie = cookie;
+ }
+ return m;
+};
+
+static __inline struct m_tag *
+m_tag_get(int type, int length, int wait)
+{
+ return m_tag_alloc(MTAG_ABI_COMPAT, type, length, wait);
+}
+
+static __inline struct m_tag *
+m_tag_first(struct mbuf *m)
+{
+ return SLIST_FIRST(&m->m_pkthdr.tags);
+};
+
+static __inline void
+m_tag_delete(struct mbuf *m, struct m_tag *t)
+{
+};
+
+static __inline struct m_tag *
+m_tag_locate(struct mbuf *m, u_int32_t n, int x, struct m_tag *t)
+{
+ return NULL;
+};
+
+#define M_SETFIB(_m, _fib) /* nothing on linux */
+static __inline void
+m_freem(struct mbuf *m)
+{
+ struct m_tag *t;
+
+ /* free the m_tag chain */
+ while ( (t = SLIST_FIRST(&m->m_pkthdr.tags) ) ) {
+ SLIST_REMOVE_HEAD(&m->m_pkthdr.tags, m_tag_link);
+ free(t, 0);
+ }
+
+ /* free the mbuf */
+ free(m, M_IPFW);
+};
+
+/* we cannot pullup */
+//#define m_pullup(__m, __i) (m)
+
+#define M_GETFIB(_m) 0
+
+#endif /* !__linux__ */
+
+/*
+ * Persistent tags stay with an mbuf until the mbuf is reclaimed. Otherwise
+ * tags are expected to ``vanish'' when they pass through a network
+ * interface. For most interfaces this happens normally as the tags are
+ * reclaimed when the mbuf is free'd. However in some special cases
+ * reclaiming must be done manually. An example is packets that pass through
+ * the loopback interface. Also, one must be careful to do this when
+ * ``turning around'' packets (e.g., icmp_reflect).
+ *
+ * To mark a tag persistent bit-or this flag in when defining the tag id.
+ * The tag will then be treated as described above.
+ */
+#define MTAG_PERSISTENT 0x800
+
+#define PACKET_TAG_NONE 0 /* Nadda */
+
+/* Packet tags for use with PACKET_ABI_COMPAT. */
+#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 */
+#define PACKET_TAG_DUMMYNET 15 /* dummynet info */
+#define PACKET_TAG_DIVERT 17 /* divert info */
+#define PACKET_TAG_IPFORWARD 18 /* ipforward info */
+#define PACKET_TAG_MACLABEL (19 | MTAG_PERSISTENT) /* MAC label */
+#define PACKET_TAG_PF 21 /* PF + ALTQ information */
+#define PACKET_TAG_RTSOCKFAM 25 /* rtsock sa family */
+#define PACKET_TAG_IPOPTIONS 27 /* Saved IP options */
+#define PACKET_TAG_CARP 28 /* CARP info */
+
+#endif /* !_SYS_MBUF_H_ */
git://git.onelab.eu / ipfw.git / blobdiff