-/*
- * Netbufs and Netbuf wrappers don't help us because we
- * have no way of keeping track of information on start
- * position once nb_grow* or nb_shrink* are called.
- */
-
-#ifdef NETBUF_PROXY
-
-#warning ...you are compiling with NETBUF_PROXY
-
-typedef struct _bpf_encapsulater
-{
- /*
- * Depending on the direction of packet travel, these
- * values have different meanings.
- *
- * INCOMING:
- * first -- time first byte of packet received.
- * second -- time last byte of packet received.
- * third -- Decompression start time
- * fourth -- Packet Handoff time
- * (second-first) -- receive time
- * (third-second) -- queue time waiting for decompression
- * (fourth-third) -- decompression time
- * (fourth - first) -- total receive time.
- * (fourth - second) -- total system process time.
- *
- * async_esc -- The number of characters escaped in this packet.
- * size1 -- The size of the inital packet before decompression.
- * This value includes the expansion caused by AC and PC compression.
- * If flags set:
- * AC implies packet got increased by 2 during receive.
- * PC implies packet got increased by 1 during receive.
- * This + "async_esc" - (AC + PC expansion) describe actual bytes over link.
- * Includes PPP header and trailer.
- * Doesn't count framing PPP_FLAG character.
- *
- * size2 -- The size after BSD decompression. PPP trailer was removed
- * so packet should be at least 2 shorter than original.
- * size3 -- The size after VJ decompression.
- *
- *
- * OUTGOING: (very similar to incoming)
- * first -- time packet arrived to pppwrite() or pppoutput()
- * second -- time compression started
- * third -- time compression ended
- * fourth -- time first byte sent to interface
- * fifth -- time last byte sent to interface
- *
- * (second - first) Time waiting in system before compression
- * (third - second) Time for compression
- * (fourth - third) Time waiting in system out queue waiting to be
- * selected for sending to interface
- * (fourth - first) Total system processing time
- * (fifth-fourth) Total interface send time.
- * (fifth-first) Total send time.
- *
- * size1 -- The size of the intial packet as receved from the stack
- * size2 -- The size after VJ compression
- * size3 -- The size after BSD compression
- *
- */
- struct timeval first, second, third, fourth, fifth;
- unsigned async_esc, size1, size2, size3;
-
- int flags; /* info about packet */
-#define NBFLAG_INCOMING 0x01 /* else outgoing */
-#define NBFLAG_AC 0x02 /* Address compressed */
-#define NBFLAG_PC 0x04 /* Protocol Compressed */
-#define NBFLAG_VJC 0x08 /* VJ compressed */
-#define NBFLAG_CCP 0x10 /* BSD compressed */
-#define NBFLAG_CCPINC 0x20 /* BSD incompressible */
-#define NBFLAG_VJCINC 0x40 /* VJ incompressible */
-
-} bpf_encapsulater;
-
-typedef struct _ppp_netbuf_t
-{
- netbuf_t buffer;
- netbuf_t orig_buffer; /*
- * Original outgoing datagram
- * received. We do compression and
- * statistics gathering on buffer,
- * we send buffer, but we return
- * orig_buffer to BPF so that it doesn't
- * have to understand all the compression.
- */
-
-
- struct _ppp_netbuf_t *next; /* for linked list */
-
- unsigned int size; /* original size requested for netbuf.
- * We leave it up to caller to
- * determine extra space they need. We
- * may also include extra space we need
- * for bounds checking.
- */
-
- unsigned char *wrapper, /* unaligned address returned for this containing
- * structure. Used for freeing.
- */
-
- *init_offset; /* Init_offset is nb_map of the netbuf_t before
- * user can change it around. Can check bounds
- * against this.
- */
- mark_t mark;
-
- bpf_encapsulater pktinfo; /* The size and compression stats that
- * get passed to user level tcpdump
- */
-
-} *ppp_netbuf_t;
-
-/*
- * These prototypes are identical to the corrisponding functions
- * found in netbuf.h except they use the ppp_netbuf_t type.
- */
-
-extern ppp_netbuf_t cb_nb_alloc(unsigned size);
-extern void cb_nb_free(ppp_netbuf_t nb);
-extern void cb_nb_duplicate(ppp_netbuf_t from, ppp_netbuf_t to);
-extern char * cb_nb_map(ppp_netbuf_t nb);
-extern char * cb_nb_map_orig(ppp_netbuf_t nb);
-extern unsigned cb_nb_size(ppp_netbuf_t nb);
-extern unsigned cb_nb_size_orig(ppp_netbuf_t nb);
-extern int cb_nb_shrink_top(ppp_netbuf_t nb, unsigned size);
-extern int cb_nb_grow_top(ppp_netbuf_t nb, unsigned size);
-extern int cb_nb_shrink_bot(ppp_netbuf_t nb, unsigned size);
-extern int cb_nb_grow_bot(ppp_netbuf_t nb, unsigned size);
-extern int cb_nb_read(ppp_netbuf_t nb, unsigned offset, unsigned size, void *target);
-extern int cb_nb_write(ppp_netbuf_t nb, unsigned offset, unsigned size, void *source);
-extern void cb_nb_get_mark(ppp_netbuf_t nb, mark_t *ptr);
-extern void cb_nb_set_mark(ppp_netbuf_t nb, mark_t ptr);
-extern void cb_nb_get_next(ppp_netbuf_t nb, ppp_netbuf_t *ptr);
-extern void cb_nb_set_next(ppp_netbuf_t nb, ppp_netbuf_t ptr);
-extern ppp_netbuf_t cb_nb_to_NB(netbuf_t);
-extern netbuf_t cb_NB_to_nb(ppp_netbuf_t);
-
-#define NETBUF_T ppp_netbuf_t
-#define NB_ALLOC cb_nb_alloc
-#define NB_FREE cb_nb_free
-#define NB_DUPLICATE cb_nb_duplicate
-#define NB_MAP cb_nb_map
-#define NB_MAP_ORIG cb_nb_map_orig
-#define NB_SIZE cb_nb_size
-#define NB_SIZE_ORIG cb_nb_size_orig
-#define NB_SHRINK_TOP cb_nb_shrink_top
-#define NB_GROW_TOP cb_nb_grow_top
-#define NB_SHRINK_BOT cb_nb_shrink_bot
-#define NB_GROW_BOT cb_nb_grow_bot
-#define NB_READ cb_nb_read
-#define NB_WRITE cb_nb_write
-#define NB_GET_MARK cb_nb_get_mark
-#define NB_SET_MARK cb_nb_set_mark
-#define NB_GET_NEXT cb_nb_get_next
-#define NB_SET_NEXT cb_nb_set_next
-#define nb_TO_NB cb_nb_to_NB
-#define NB_TO_nb cb_NB_to_nb
-
-#else /* NETBUF_PROXY */
-
projects / ppp.git / blobdiff