sctpconstants.h

来自「TCPDUMP的C语言源代码,是在数据链路层的应用」· C头文件 代码 · 共 572 行 · 第 1/2 页

/* number of simultaneous timers running */
#define SCTP_MAX_NET_TIMERS     6	/* base of where net timers start */
#define SCTP_NUMBER_TIMERS	12	/* allows up to 6 destinations */


/* Of course we really don't collect stale cookies, being
 * folks of decerning taste. However we do count them, if
 * we get to many before the association comes up.. we
 * give up. Below is the constant that dictates when
 * we give it up...this is a implemenation dependant
 * treatment. In ours we do not ask for a extension of
 * time, but just retry this many times...
 */
#define SCTP_MAX_STALE_COOKIES_I_COLLECT 10

/* max number of TSN's dup'd that I will hold */
#define SCTP_MAX_DUP_TSNS      20

/* Here we define the types used when
 * setting the retry ammounts.
 */
/* constants for type of set */
#define SCTP_MAXATTEMPT_INIT 2
#define SCTP_MAXATTEMPT_SEND 3

/* Here we define the default timers and the
 * default number of attemts we make for
 * each respective side (send/init).
 */

/* init timer def = 3sec  */
#define SCTP_INIT_SEC	3
#define SCTP_INIT_NSEC	0

/* send timer def = 3 seconds */
#define SCTP_SEND_SEC	1
#define SCTP_SEND_NSEC	0

/* recv timer def = 200ms (in nsec) */
#define SCTP_RECV_SEC	0
#define SCTP_RECV_NSEC	200000000

/* 30 seconds + RTO */
#define SCTP_HB_SEC	30
#define SCTP_HB_NSEC	0


/* 300 ms */
#define SCTP_SHUTDOWN_SEC	0
#define SCTP_SHUTDOWN_NSEC	300000000

#define SCTP_RTO_UPPER_BOUND 60000000 /* 60 sec in micro-second's */
#define SCTP_RTO_UPPER_BOUND_SEC 60  /* for the init timer */
#define SCTP_RTO_LOWER_BOUND  1000000 /* 1 sec in micro-sec's */

#define SCTP_DEF_MAX_INIT 8
#define SCTP_DEF_MAX_SEND 10

#define SCTP_DEF_PMTU_RAISE 600  /* 10 Minutes between raise attempts */
#define SCTP_DEF_PMTU_MIN   600

#define SCTP_MSEC_IN_A_SEC  1000
#define SCTP_USEC_IN_A_SEC  1000000
#define SCTP_NSEC_IN_A_SEC  1000000000


/* Events that SCTP will look for, these
 * are or'd together to declare what SCTP
 * wants. Each select mask/poll list should be
 * set for the fd, if the bit is on.
 */
#define SCTP_EVENT_READ		0x000001
#define SCTP_EVENT_WRITE	0x000002
#define SCTP_EVENT_EXCEPT	0x000004

/* The following constant is a value for this
 * particular implemenation. It is quite arbitrary and
 * is used to limit how much data will be queued up to
 * a sender, waiting for cwnd to be larger than flightSize.
 * All implementations will need this protection is some
 * way due to buffer size constraints.
 */

#define SCTP_MAX_OUTSTANDING_DG	10000



/* This constant (SCTP_MAX_READBUFFER) define
 * how big the read/write buffer is
 * when we enter the fd event notification
 * the buffer is put on the stack, so the bigger
 * it is the more stack you chew up, however it
 * has got to be big enough to handle the bigest
 * message this O/S will send you. In solaris
 * with sockets (not TLI) we end up at a value
 * of 64k. In TLI we could do partial reads to
 * get it all in with less hassel.. but we
 * write to sockets for generality.
 */
#define SCTP_MAX_READBUFFER 65536
#define SCTP_ADDRMAX 60

/* amount peer is obligated to have in rwnd or
 * I will abort
 */
#define SCTP_MIN_RWND	1500

#define SCTP_WINDOW_MIN	1500	/* smallest rwnd can be */
#define SCTP_WINDOW_MAX 1048576	/* biggest I can grow rwnd to
				 * My playing around suggests a
				 * value greater than 64k does not
				 * do much, I guess via the kernel
				 * limitations on the stream/socket.
				 */

#define SCTP_MAX_BUNDLE_UP 256	/* max number of chunks I can bundle */

/*  I can handle a 1meg re-assembly */
#define SCTP_DEFAULT_MAXMSGREASM 1048576


#define SCTP_DEFAULT_MAXWINDOW	32768	/* default rwnd size */
#define SCTP_DEFAULT_MAXSEGMENT 1500	/* MTU size, this is the default
                                         * to which we set the smallestMTU
					 * size to. This governs what is the
					 * largest size we will use, of course
					 * PMTU will raise this up to
					 * the largest interface MTU or the
					 * ceiling below if there is no
					 * SIOCGIFMTU.
					 */
#ifdef LYNX
#define DEFAULT_MTU_CEILING  1500 	/* Since Lynx O/S is brain dead
					 * in the way it handles the
					 * raw IP socket, insisting
					 * on makeing its own IP
					 * header, we limit the growth
					 * to that of the e-net size
					 */
#else
#define DEFAULT_MTU_CEILING  2048	/* If no SIOCGIFMTU, highest value
					 * to raise the PMTU to, i.e.
					 * don't try to raise above this
					 * value. Tune this per your
					 * largest MTU interface if your
					 * system does not support the
					 * SIOCGIFMTU ioctl.
					 */
#endif
#define SCTP_DEFAULT_MINSEGMENT 512	/* MTU size ... if no mtu disc */
#define SCTP_HOW_MANY_SECRETS 2		/* how many secrets I keep */
/* This is how long a secret lives, NOT how long a cookie lives */
#define SCTP_HOW_LONG_COOKIE_LIVE 3600	/* how many seconds the current secret will live */

#define SCTP_NUMBER_OF_SECRETS	8	/* or 8 * 4 = 32 octets */
#define SCTP_SECRET_SIZE 32		/* number of octets in a 256 bits */

#ifdef USE_MD5
#define SCTP_SIGNATURE_SIZE 16	/* size of a MD5 signature */
#else
#define SCTP_SIGNATURE_SIZE 20	/* size of a SLA-1 signature */
#endif
/* Here are the notification constants
 * that the code and upper layer will get
 */

/* association is up */
#define SCTP_NOTIFY_ASSOC_UP		1

/* association is down */
#define SCTP_NOTIFY_ASSOC_DOWN		2

/* interface on a association is down
 * and out of consideration for selection.
 */
#define SCTP_NOTIFY_INTF_DOWN		3

/* interface on a association is up
 * and now back in consideration for selection.
 */
#define SCTP_NOTIFY_INTF_UP		4

/* The given datagram cannot be delivered
 * to the peer, this will probably be followed
 * by a SCTP_NOTFIY_ASSOC_DOWN.
 */
#define SCTP_NOTIFY_DG_FAIL		5

/* Sent dg on non-open stream extreme code error!
 */
#define SCTP_NOTIFY_STRDATA_ERR 	6

#define SCTP_NOTIFY_ASSOC_ABORTED	7

/* The stream ones are not used yet, but could
 * be when a association opens.
 */
#define SCTP_NOTIFY_PEER_OPENED_STR	8
#define SCTP_NOTIFY_STREAM_OPENED_OK	9

/* association sees a restart event */
#define SCTP_NOTIFY_ASSOC_RESTART	10

/* a user requested HB returned */
#define SCTP_NOTIFY_HB_RESP             11

/* a result from a REL-REQ */
#define SCTP_NOTIFY_RELREQ_RESULT_OK		12
#define SCTP_NOTIFY_RELREQ_RESULT_FAILED	13

/* clock variance is 10ms or 10,000 us's */
#define SCTP_CLOCK_GRAINULARITY 10000

#define IP_HDR_SIZE 40		/* we use the size of a IP6 header here
				 * this detracts a small amount for ipv4
				 * but it simplifies the ipv6 addition
				 */

#define SCTP_NUM_FDS 3

/* raw IP filedescriptor */
#define SCTP_FD_IP   0
/* raw ICMP filedescriptor */
#define SCTP_FD_ICMP 1
/* processes contact me for requests here */
#define SCTP_REQUEST 2


#define SCTP_DEAMON_PORT 9899

/* Deamon registration message types/responses */
#define DEAMON_REGISTER       0x01
#define DEAMON_REGISTER_ACK   0x02
#define DEAMON_DEREGISTER     0x03
#define DEAMON_DEREGISTER_ACK 0x04
#define DEAMON_CHECKADDR_LIST 0x05

#define DEAMON_MAGIC_VER_LEN 0xff

/* max times I will attempt to send a message to deamon */
#define SCTP_MAX_ATTEMPTS_AT_DEAMON 5
#define SCTP_TIMEOUT_IN_POLL_FOR_DEAMON 1500 /* 1.5 seconds */

/* modular comparison */
/* True if a > b (mod = M) */
#define compare_with_wrap(a, b, M) ((a > b) && ((a - b) < (M >> 1))) || \
              ((b > a) && ((b - a) > (M >> 1)))

#ifndef TIMEVAL_TO_TIMESPEC
#define TIMEVAL_TO_TIMESPEC(tv, ts)			\
{							\
    (ts)->tv_sec  = (tv)->tv_sec;			\
    (ts)->tv_nsec = (tv)->tv_usec * 1000;		\
}
#endif

/* pegs */
#define SCTP_NUMBER_OF_PEGS 21
/* peg index's */
#define SCTP_PEG_SACKS_SEEN 0
#define SCTP_PEG_SACKS_SENT 1
#define SCTP_PEG_TSNS_SENT  2
#define SCTP_PEG_TSNS_RCVD  3
#define SCTP_DATAGRAMS_SENT 4
#define SCTP_DATAGRAMS_RCVD 5
#define SCTP_RETRANTSN_SENT 6
#define SCTP_DUPTSN_RECVD   7
#define SCTP_HBR_RECV	    8
#define SCTP_HBA_RECV       9
#define SCTP_HB_SENT	   10
#define SCTP_DATA_DG_SENT  11
#define SCTP_DATA_DG_RECV  12
#define SCTP_TMIT_TIMER    13
#define SCTP_RECV_TIMER    14
#define SCTP_HB_TIMER      15
#define SCTP_FAST_RETRAN   16
#define SCTP_PEG_TSNS_READ 17
#define SCTP_NONE_LFT_TO   18
#define SCTP_NONE_LFT_RWND 19
#define SCTP_NONE_LFT_CWND 20



#endif