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@@ -1,1408 +0,0 @@
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-#include "u.h"
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-#include "../port/lib.h"
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-#include "mem.h"
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-#include "dat.h"
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-#include "fns.h"
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-#include "../port/error.h"
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-
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-#include "ip.h"
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-
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-enum /* Connection state */
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-{
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- Ilclosed,
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- Ilsyncer,
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- Ilsyncee,
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- Ilestablished,
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- Illistening,
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- Ilclosing,
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- Ilopening, /* only for file server */
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-};
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-
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-char *ilstates[] =
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-{
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- "Closed",
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- "Syncer",
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- "Syncee",
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- "Established",
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- "Listen",
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- "Closing",
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- "Opening", /* only for file server */
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-};
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-
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-enum /* Packet types */
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-{
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- Ilsync,
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- Ildata,
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- Ildataquery,
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- Ilack,
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- Ilquery,
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- Ilstate,
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- Ilclose,
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-};
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-
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-char *iltype[] =
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-{
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- "sync",
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- "data",
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- "dataquery",
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- "ack",
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- "query",
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- "state",
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- "close"
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-};
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-
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-enum
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-{
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- Seconds = 1000,
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- Iltickms = 50, /* time base */
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- AckDelay = 2*Iltickms, /* max time twixt message rcvd & ack sent */
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- MaxTimeout = 30*Seconds, /* max time between rexmit */
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- QueryTime = 10*Seconds, /* time between subsequent queries */
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- DeathTime = 30*QueryTime,
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-
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- MaxRexmit = 16, /* max retransmissions before hangup */
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- Defaultwin = 20,
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-
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- LogAGain = 3,
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- AGain = 1<<LogAGain,
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- LogDGain = 2,
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- DGain = 1<<LogDGain,
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-
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- DefByteRate = 100, /* assume a megabit link */
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- DefRtt = 50, /* cross country on a great day */
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-
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- Maxrq = 64*1024,
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-};
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-
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-enum
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-{
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- Nqt= 8,
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-};
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-
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-typedef struct Ilcb Ilcb;
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-struct Ilcb /* Control block */
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-{
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- int state; /* Connection state */
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- Conv *conv;
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- QLock ackq; /* Unacknowledged queue */
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- Block *unacked;
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- Block *unackedtail;
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- ulong unackedbytes;
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- QLock outo; /* Out of order packet queue */
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- Block *outoforder;
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- ulong next; /* Id of next to send */
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- ulong recvd; /* Last packet received */
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- ulong acksent; /* Last packet acked */
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- ulong start; /* Local start id */
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- ulong rstart; /* Remote start id */
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- int window; /* Maximum receive window */
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- int rxquery; /* number of queries on this connection */
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- int rxtot; /* number of retransmits on this connection */
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- int rexmit; /* number of retransmits of *unacked */
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- ulong qt[Nqt+1]; /* state table for query messages */
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- int qtx; /* ... index into qt */
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-
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- /* if set, fasttimeout causes a connection request to terminate after 4*Iltickms */
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- int fasttimeout;
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-
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- /* timers */
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- ulong lastxmit; /* time of last xmit */
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- ulong lastrecv; /* time of last recv */
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- ulong timeout; /* retransmission time for *unacked */
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- ulong acktime; /* time to send next ack */
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- ulong querytime; /* time to send next query */
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-
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- /* adaptive measurements */
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- int delay; /* Average of the fixed rtt delay */
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- int rate; /* Average uchar rate */
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- int mdev; /* Mean deviation of rtt */
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- int maxrtt; /* largest rtt seen */
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- ulong rttack; /* The ack we are waiting for */
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- int rttlen; /* Length of rttack packet */
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- uvlong rttstart; /* Time we issued rttack packet */
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-};
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-
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-enum
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-{
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- IL_IPSIZE = 20,
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- IL_HDRSIZE = 18,
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- IL_LISTEN = 0,
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- IL_CONNECT = 1,
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- IP_ILPROTO = 40,
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-};
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-
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-typedef struct Ilhdr Ilhdr;
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-struct Ilhdr
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-{
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- uchar vihl; /* Version and header length */
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- uchar tos; /* Type of service */
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- uchar length[2]; /* packet length */
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- uchar id[2]; /* Identification */
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- uchar frag[2]; /* Fragment information */
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- uchar ttl; /* Time to live */
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- uchar proto; /* Protocol */
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- uchar cksum[2]; /* Header checksum */
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- uchar src[4]; /* Ip source */
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- uchar dst[4]; /* Ip destination */
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- uchar ilsum[2]; /* Checksum including header */
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- uchar illen[2]; /* Packet length */
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- uchar iltype; /* Packet type */
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- uchar ilspec; /* Special */
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- uchar ilsrc[2]; /* Src port */
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- uchar ildst[2]; /* Dst port */
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- uchar ilid[4]; /* Sequence id */
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- uchar ilack[4]; /* Acked sequence */
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-};
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-
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-enum
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-{
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- InMsgs,
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- OutMsgs,
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- CsumErrs, /* checksum errors */
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- HlenErrs, /* header length error */
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- LenErrs, /* short packet */
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- OutOfOrder, /* out of order */
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- Retrans, /* retransmissions */
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- DupMsg,
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- DupBytes,
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- DroppedMsgs,
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-
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- Nstats,
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-};
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-
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-static char *statnames[] =
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-{
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-[InMsgs] "InMsgs",
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-[OutMsgs] "OutMsgs",
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-[CsumErrs] "CsumErrs",
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-[HlenErrs] "HlenErr",
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-[LenErrs] "LenErrs",
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-[OutOfOrder] "OutOfOrder",
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-[Retrans] "Retrans",
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-[DupMsg] "DupMsg",
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-[DupBytes] "DupBytes",
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-[DroppedMsgs] "DroppedMsgs",
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-};
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-
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-typedef struct Ilpriv Ilpriv;
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-struct Ilpriv
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-{
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- Ipht ht;
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-
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- ulong stats[Nstats];
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-
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- ulong csumerr; /* checksum errors */
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- ulong hlenerr; /* header length error */
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- ulong lenerr; /* short packet */
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- ulong order; /* out of order */
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- ulong rexmit; /* retransmissions */
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- ulong dup;
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- ulong dupb;
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-
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- /* keeping track of the ack kproc */
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- int ackprocstarted;
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- QLock apl;
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-};
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-
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-/* state for query/dataquery messages */
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-
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-
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-void ilrcvmsg(Conv*, Block*);
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-void ilsendctl(Conv*, Ilhdr*, int, ulong, ulong, int);
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-void ilackq(Ilcb*, Block*);
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-void ilprocess(Conv*, Ilhdr*, Block*);
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-void ilpullup(Conv*);
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-void ilhangup(Conv*, char*);
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-void ilfreeq(Ilcb*);
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-void ilrexmit(Ilcb*);
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-void ilbackoff(Ilcb*);
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-void ilsettimeout(Ilcb*);
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-char* ilstart(Conv*, int, int);
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-void ilackproc(void*);
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-void iloutoforder(Conv*, Ilhdr*, Block*);
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-void iliput(Proto*, Ipifc*, Block*);
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-void iladvise(Proto*, Block*, char*);
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-int ilnextqt(Ilcb*);
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-void ilcbinit(Ilcb*);
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-int later(ulong, ulong, char*);
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-void ilreject(Fs*, Ilhdr*);
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-void illocalclose(Conv *c);
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- int ilcksum = 1;
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-static int initseq = 25001;
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-static ulong scalediv, scalemul;
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-static char *etime = "connection timed out";
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-
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-static char*
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-ilconnect(Conv *c, char **argv, int argc)
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-{
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- char *e, *p;
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- int fast;
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-
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- /* huge hack to quickly try an il connection */
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- fast = 0;
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- if(argc > 1){
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- p = strstr(argv[1], "!fasttimeout");
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- if(p != nil){
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- *p = 0;
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- fast = 1;
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- }
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- }
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-
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- e = Fsstdconnect(c, argv, argc);
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- if(e != nil)
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- return e;
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- return ilstart(c, IL_CONNECT, fast);
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-}
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-
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-static int
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-ilstate(Conv *c, char *state, int n)
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-{
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- Ilcb *ic;
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-
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- ic = (Ilcb*)(c->ptcl);
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- return snprint(state, n, "%s qin %d qout %d del %5.5d Br %5.5d md %5.5d una %5.5lud rex %5.5d rxq %5.5d max %5.5d\n",
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- ilstates[ic->state],
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- c->rq ? qlen(c->rq) : 0,
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- c->wq ? qlen(c->wq) : 0,
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- ic->delay>>LogAGain, ic->rate>>LogAGain, ic->mdev>>LogDGain,
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- ic->unackedbytes, ic->rxtot, ic->rxquery, ic->maxrtt);
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-}
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-
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-static int
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-ilinuse(Conv *c)
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-{
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- Ilcb *ic;
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-
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- ic = (Ilcb*)(c->ptcl);
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- return ic->state != Ilclosed;
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-
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-}
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-
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-/* called with c locked */
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-static char*
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-ilannounce(Conv *c, char **argv, int argc)
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-{
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- char *e;
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-
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- e = Fsstdannounce(c, argv, argc);
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- if(e != nil)
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- return e;
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- e = ilstart(c, IL_LISTEN, 0);
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- if(e != nil)
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- return e;
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- Fsconnected(c, nil);
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-
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- return nil;
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-}
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-
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-void
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-illocalclose(Conv *c)
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-{
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- Ilcb *ic;
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- Ilpriv *ipriv;
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-
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- ipriv = c->p->priv;
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- ic = (Ilcb*)c->ptcl;
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- ic->state = Ilclosed;
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- iphtrem(&ipriv->ht, c);
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- ipmove(c->laddr, IPnoaddr);
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- c->lport = 0;
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-}
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-
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-static void
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-ilclose(Conv *c)
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-{
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- Ilcb *ic;
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-
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- ic = (Ilcb*)c->ptcl;
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-
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- qclose(c->rq);
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- qclose(c->wq);
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- qclose(c->eq);
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-
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- switch(ic->state) {
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- case Ilclosing:
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- case Ilclosed:
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- break;
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- case Ilsyncer:
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- case Ilsyncee:
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- case Ilestablished:
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- ic->state = Ilclosing;
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- ilsettimeout(ic);
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- ilsendctl(c, nil, Ilclose, ic->next, ic->recvd, 0);
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- break;
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- case Illistening:
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- illocalclose(c);
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- break;
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- }
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- ilfreeq(ic);
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-}
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-
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-void
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-ilkick(void *x, Block *bp)
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-{
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- Conv *c = x;
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- Ilhdr *ih;
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- Ilcb *ic;
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- int dlen;
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- ulong id, ack;
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- Fs *f;
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- Ilpriv *priv;
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-
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- f = c->p->f;
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- priv = c->p->priv;
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- ic = (Ilcb*)c->ptcl;
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-
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- if(bp == nil)
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- return;
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-
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- switch(ic->state) {
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- case Ilclosed:
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- case Illistening:
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- case Ilclosing:
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- freeblist(bp);
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- qhangup(c->rq, nil);
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- return;
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- }
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-
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- dlen = blocklen(bp);
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-
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- /* Make space to fit il & ip */
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- bp = padblock(bp, IL_IPSIZE+IL_HDRSIZE);
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- ih = (Ilhdr *)(bp->rp);
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- ih->vihl = IP_VER4;
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-
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- /* Ip fields */
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- ih->frag[0] = 0;
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- ih->frag[1] = 0;
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- v6tov4(ih->dst, c->raddr);
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- v6tov4(ih->src, c->laddr);
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- ih->proto = IP_ILPROTO;
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-
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- /* Il fields */
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- hnputs(ih->illen, dlen+IL_HDRSIZE);
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- hnputs(ih->ilsrc, c->lport);
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- hnputs(ih->ildst, c->rport);
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-
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- qlock(&ic->ackq);
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- id = ic->next++;
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- hnputl(ih->ilid, id);
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- ack = ic->recvd;
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- hnputl(ih->ilack, ack);
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- ic->acksent = ack;
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- ic->acktime = NOW + AckDelay;
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- ih->iltype = Ildata;
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- ih->ilspec = 0;
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- ih->ilsum[0] = 0;
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- ih->ilsum[1] = 0;
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-
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- /* Checksum of ilheader plus data (not ip & no pseudo header) */
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- if(ilcksum)
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- hnputs(ih->ilsum, ptclcsum(bp, IL_IPSIZE, dlen+IL_HDRSIZE));
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-
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- ilackq(ic, bp);
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- qunlock(&ic->ackq);
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-
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- /* Start the round trip timer for this packet if the timer is free */
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- if(ic->rttack == 0) {
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- ic->rttack = id;
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- ic->rttstart = fastticks(nil);
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- ic->rttlen = dlen + IL_IPSIZE + IL_HDRSIZE;
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- }
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-
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- if(later(NOW, ic->timeout, nil))
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- ilsettimeout(ic);
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- ipoput4(f, bp, 0, c->ttl, c->tos, c);
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- priv->stats[OutMsgs]++;
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-}
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-
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-static void
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-ilcreate(Conv *c)
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-{
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- c->rq = qopen(Maxrq, 0, 0, c);
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- c->wq = qbypass(ilkick, c);
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-}
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-
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-int
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-ilxstats(Proto *il, char *buf, int len)
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-{
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- Ilpriv *priv;
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- char *p, *e;
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- int i;
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-
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- priv = il->priv;
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- p = buf;
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- e = p+len;
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- for(i = 0; i < Nstats; i++)
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- p = seprint(p, e, "%s: %lud\n", statnames[i], priv->stats[i]);
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- return p - buf;
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-}
|
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|
-
|
|
|
-void
|
|
|
-ilackq(Ilcb *ic, Block *bp)
|
|
|
-{
|
|
|
- Block *np;
|
|
|
- int n;
|
|
|
-
|
|
|
- n = blocklen(bp);
|
|
|
-
|
|
|
- /* Enqueue a copy on the unacked queue in case this one gets lost */
|
|
|
- np = copyblock(bp, n);
|
|
|
- if(ic->unacked)
|
|
|
- ic->unackedtail->list = np;
|
|
|
- else
|
|
|
- ic->unacked = np;
|
|
|
- ic->unackedtail = np;
|
|
|
- np->list = nil;
|
|
|
- ic->unackedbytes += n;
|
|
|
-}
|
|
|
-
|
|
|
-static
|
|
|
-void
|
|
|
-ilrttcalc(Ilcb *ic, Block *bp)
|
|
|
-{
|
|
|
- int rtt, tt, pt, delay, rate;
|
|
|
-
|
|
|
- rtt = fastticks(nil) - ic->rttstart;
|
|
|
- rtt = (rtt*scalemul)/scalediv;
|
|
|
- delay = ic->delay;
|
|
|
- rate = ic->rate;
|
|
|
-
|
|
|
- /* Guard against zero wrap */
|
|
|
- if(rtt > 120000 || rtt < 0)
|
|
|
- return;
|
|
|
-
|
|
|
- /* this block had to be transmitted after the one acked so count its size */
|
|
|
- ic->rttlen += blocklen(bp) + IL_IPSIZE + IL_HDRSIZE;
|
|
|
-
|
|
|
- if(ic->rttlen < 256){
|
|
|
- /* guess fixed delay as rtt of small packets */
|
|
|
- delay += rtt - (delay>>LogAGain);
|
|
|
- if(delay < AGain)
|
|
|
- delay = AGain;
|
|
|
- ic->delay = delay;
|
|
|
- } else {
|
|
|
- /* if packet took longer than avg rtt delay, recalc rate */
|
|
|
- tt = rtt - (delay>>LogAGain);
|
|
|
- if(tt > 0){
|
|
|
- rate += ic->rttlen/tt - (rate>>LogAGain);
|
|
|
- if(rate < AGain)
|
|
|
- rate = AGain;
|
|
|
- ic->rate = rate;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /* mdev */
|
|
|
- pt = ic->rttlen/(rate>>LogAGain) + (delay>>LogAGain);
|
|
|
- ic->mdev += abs(rtt-pt) - (ic->mdev>>LogDGain);
|
|
|
-
|
|
|
- if(rtt > ic->maxrtt)
|
|
|
- ic->maxrtt = rtt;
|
|
|
-}
|
|
|
-
|
|
|
-void
|
|
|
-ilackto(Ilcb *ic, ulong ackto, Block *bp)
|
|
|
-{
|
|
|
- Ilhdr *h;
|
|
|
- ulong id;
|
|
|
-
|
|
|
- if(ic->rttack == ackto)
|
|
|
- ilrttcalc(ic, bp);
|
|
|
-
|
|
|
- /* Cancel if we've passed the packet we were interested in */
|
|
|
- if(ic->rttack <= ackto)
|
|
|
- ic->rttack = 0;
|
|
|
-
|
|
|
- qlock(&ic->ackq);
|
|
|
- while(ic->unacked) {
|
|
|
- h = (Ilhdr *)ic->unacked->rp;
|
|
|
- id = nhgetl(h->ilid);
|
|
|
- if(ackto < id)
|
|
|
- break;
|
|
|
-
|
|
|
- bp = ic->unacked;
|
|
|
- ic->unacked = bp->list;
|
|
|
- bp->list = nil;
|
|
|
- ic->unackedbytes -= blocklen(bp);
|
|
|
- freeblist(bp);
|
|
|
- ic->rexmit = 0;
|
|
|
- ilsettimeout(ic);
|
|
|
- }
|
|
|
- qunlock(&ic->ackq);
|
|
|
-}
|
|
|
-
|
|
|
-void
|
|
|
-iliput(Proto *il, Ipifc*, Block *bp)
|
|
|
-{
|
|
|
- char *st;
|
|
|
- Ilcb *ic;
|
|
|
- Ilhdr *ih;
|
|
|
- uchar raddr[IPaddrlen];
|
|
|
- uchar laddr[IPaddrlen];
|
|
|
- ushort sp, dp, csum;
|
|
|
- int plen, illen;
|
|
|
- Conv *new, *s;
|
|
|
- Ilpriv *ipriv;
|
|
|
-
|
|
|
- ipriv = il->priv;
|
|
|
-
|
|
|
- ih = (Ilhdr *)bp->rp;
|
|
|
- plen = blocklen(bp);
|
|
|
- if(plen < IL_IPSIZE+IL_HDRSIZE){
|
|
|
- netlog(il->f, Logil, "il: hlenerr\n");
|
|
|
- ipriv->stats[HlenErrs]++;
|
|
|
- goto raise;
|
|
|
- }
|
|
|
-
|
|
|
- illen = nhgets(ih->illen);
|
|
|
- if(illen+IL_IPSIZE > plen){
|
|
|
- netlog(il->f, Logil, "il: lenerr\n");
|
|
|
- ipriv->stats[LenErrs]++;
|
|
|
- goto raise;
|
|
|
- }
|
|
|
-
|
|
|
- sp = nhgets(ih->ildst);
|
|
|
- dp = nhgets(ih->ilsrc);
|
|
|
- v4tov6(raddr, ih->src);
|
|
|
- v4tov6(laddr, ih->dst);
|
|
|
-
|
|
|
- if((csum = ptclcsum(bp, IL_IPSIZE, illen)) != 0) {
|
|
|
- if(ih->iltype > Ilclose)
|
|
|
- st = "?";
|
|
|
- else
|
|
|
- st = iltype[ih->iltype];
|
|
|
- ipriv->stats[CsumErrs]++;
|
|
|
- netlog(il->f, Logil, "il: cksum %ux %ux, pkt(%s id %lud ack %lud %I/%d->%d)\n",
|
|
|
- csum, st, nhgetl(ih->ilid), nhgetl(ih->ilack), raddr, sp, dp);
|
|
|
- goto raise;
|
|
|
- }
|
|
|
-
|
|
|
- qlock(il);
|
|
|
- s = iphtlook(&ipriv->ht, raddr, dp, laddr, sp);
|
|
|
- if(s == nil){
|
|
|
- if(ih->iltype == Ilsync)
|
|
|
- ilreject(il->f, ih); /* no listener */
|
|
|
- qunlock(il);
|
|
|
- goto raise;
|
|
|
- }
|
|
|
-
|
|
|
- ic = (Ilcb*)s->ptcl;
|
|
|
- if(ic->state == Illistening){
|
|
|
- if(ih->iltype != Ilsync){
|
|
|
- qunlock(il);
|
|
|
- if(ih->iltype > Ilclose)
|
|
|
- st = "?";
|
|
|
- else
|
|
|
- st = iltype[ih->iltype];
|
|
|
- ilreject(il->f, ih); /* no channel and not sync */
|
|
|
- netlog(il->f, Logil, "il: no channel, pkt(%s id %lud ack %lud %I/%ud->%ud)\n",
|
|
|
- st, nhgetl(ih->ilid), nhgetl(ih->ilack), raddr, sp, dp);
|
|
|
- goto raise;
|
|
|
- }
|
|
|
-
|
|
|
- new = Fsnewcall(s, raddr, dp, laddr, sp, V4);
|
|
|
- if(new == nil){
|
|
|
- qunlock(il);
|
|
|
- netlog(il->f, Logil, "il: bad newcall %I/%ud->%ud\n", raddr, sp, dp);
|
|
|
- ilsendctl(s, ih, Ilclose, 0, nhgetl(ih->ilid), 0);
|
|
|
- goto raise;
|
|
|
- }
|
|
|
- s = new;
|
|
|
-
|
|
|
- ic = (Ilcb*)s->ptcl;
|
|
|
-
|
|
|
- ic->conv = s;
|
|
|
- ic->state = Ilsyncee;
|
|
|
- ilcbinit(ic);
|
|
|
- ic->rstart = nhgetl(ih->ilid);
|
|
|
- iphtadd(&ipriv->ht, s);
|
|
|
- }
|
|
|
-
|
|
|
- qlock(s);
|
|
|
- qunlock(il);
|
|
|
- if(waserror()){
|
|
|
- qunlock(s);
|
|
|
- nexterror();
|
|
|
- }
|
|
|
- ilprocess(s, ih, bp);
|
|
|
- qunlock(s);
|
|
|
- poperror();
|
|
|
- return;
|
|
|
-raise:
|
|
|
- freeblist(bp);
|
|
|
-}
|
|
|
-
|
|
|
-void
|
|
|
-_ilprocess(Conv *s, Ilhdr *h, Block *bp)
|
|
|
-{
|
|
|
- Ilcb *ic;
|
|
|
- ulong id, ack;
|
|
|
- Ilpriv *priv;
|
|
|
-
|
|
|
- id = nhgetl(h->ilid);
|
|
|
- ack = nhgetl(h->ilack);
|
|
|
-
|
|
|
- ic = (Ilcb*)s->ptcl;
|
|
|
-
|
|
|
- ic->lastrecv = NOW;
|
|
|
- ic->querytime = NOW + QueryTime;
|
|
|
- priv = s->p->priv;
|
|
|
- priv->stats[InMsgs]++;
|
|
|
-
|
|
|
- switch(ic->state) {
|
|
|
- default:
|
|
|
- netlog(s->p->f, Logil, "il: unknown state %d\n", ic->state);
|
|
|
- case Ilclosed:
|
|
|
- freeblist(bp);
|
|
|
- break;
|
|
|
- case Ilsyncer:
|
|
|
- switch(h->iltype) {
|
|
|
- default:
|
|
|
- break;
|
|
|
- case Ilsync:
|
|
|
- if(ack != ic->start)
|
|
|
- ilhangup(s, "connection rejected");
|
|
|
- else {
|
|
|
- ic->recvd = id;
|
|
|
- ic->rstart = id;
|
|
|
- ilsendctl(s, nil, Ilack, ic->next, ic->recvd, 0);
|
|
|
- ic->state = Ilestablished;
|
|
|
- ic->fasttimeout = 0;
|
|
|
- ic->rexmit = 0;
|
|
|
- Fsconnected(s, nil);
|
|
|
- ilpullup(s);
|
|
|
- }
|
|
|
- break;
|
|
|
- case Ilclose:
|
|
|
- if(ack == ic->start)
|
|
|
- ilhangup(s, "connection rejected");
|
|
|
- break;
|
|
|
- }
|
|
|
- freeblist(bp);
|
|
|
- break;
|
|
|
- case Ilsyncee:
|
|
|
- switch(h->iltype) {
|
|
|
- default:
|
|
|
- break;
|
|
|
- case Ilsync:
|
|
|
- if(id != ic->rstart || ack != 0){
|
|
|
- illocalclose(s);
|
|
|
- } else {
|
|
|
- ic->recvd = id;
|
|
|
- ilsendctl(s, nil, Ilsync, ic->start, ic->recvd, 0);
|
|
|
- }
|
|
|
- break;
|
|
|
- case Ilack:
|
|
|
- if(ack == ic->start) {
|
|
|
- ic->state = Ilestablished;
|
|
|
- ic->fasttimeout = 0;
|
|
|
- ic->rexmit = 0;
|
|
|
- ilpullup(s);
|
|
|
- }
|
|
|
- break;
|
|
|
- case Ildata:
|
|
|
- if(ack == ic->start) {
|
|
|
- ic->state = Ilestablished;
|
|
|
- ic->fasttimeout = 0;
|
|
|
- ic->rexmit = 0;
|
|
|
- goto established;
|
|
|
- }
|
|
|
- break;
|
|
|
- case Ilclose:
|
|
|
- if(ack == ic->start)
|
|
|
- ilhangup(s, "remote close");
|
|
|
- break;
|
|
|
- }
|
|
|
- freeblist(bp);
|
|
|
- break;
|
|
|
- case Ilestablished:
|
|
|
- established:
|
|
|
- switch(h->iltype) {
|
|
|
- case Ilsync:
|
|
|
- if(id != ic->rstart)
|
|
|
- ilhangup(s, "remote close");
|
|
|
- else
|
|
|
- ilsendctl(s, nil, Ilack, ic->next, ic->rstart, 0);
|
|
|
- freeblist(bp);
|
|
|
- break;
|
|
|
- case Ildata:
|
|
|
- /*
|
|
|
- * avoid consuming all the mount rpc buffers in the
|
|
|
- * system. if the input queue is too long, drop this
|
|
|
- * packet.
|
|
|
- */
|
|
|
- if (s->rq && qlen(s->rq) >= Maxrq) {
|
|
|
- priv->stats[DroppedMsgs]++;
|
|
|
- freeblist(bp);
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- ilackto(ic, ack, bp);
|
|
|
- iloutoforder(s, h, bp);
|
|
|
- ilpullup(s);
|
|
|
- break;
|
|
|
- case Ildataquery:
|
|
|
- ilackto(ic, ack, bp);
|
|
|
- iloutoforder(s, h, bp);
|
|
|
- ilpullup(s);
|
|
|
- ilsendctl(s, nil, Ilstate, ic->next, ic->recvd, h->ilspec);
|
|
|
- break;
|
|
|
- case Ilack:
|
|
|
- ilackto(ic, ack, bp);
|
|
|
- freeblist(bp);
|
|
|
- break;
|
|
|
- case Ilquery:
|
|
|
- ilackto(ic, ack, bp);
|
|
|
- ilsendctl(s, nil, Ilstate, ic->next, ic->recvd, h->ilspec);
|
|
|
- freeblist(bp);
|
|
|
- break;
|
|
|
- case Ilstate:
|
|
|
- if(ack >= ic->rttack)
|
|
|
- ic->rttack = 0;
|
|
|
- ilackto(ic, ack, bp);
|
|
|
- if(h->ilspec > Nqt)
|
|
|
- h->ilspec = 0;
|
|
|
- if(ic->qt[h->ilspec] > ack){
|
|
|
- ilrexmit(ic);
|
|
|
- ilsettimeout(ic);
|
|
|
- }
|
|
|
- freeblist(bp);
|
|
|
- break;
|
|
|
- case Ilclose:
|
|
|
- freeblist(bp);
|
|
|
- if(ack < ic->start || ack > ic->next)
|
|
|
- break;
|
|
|
- ic->recvd = id;
|
|
|
- ilsendctl(s, nil, Ilclose, ic->next, ic->recvd, 0);
|
|
|
- ic->state = Ilclosing;
|
|
|
- ilsettimeout(ic);
|
|
|
- ilfreeq(ic);
|
|
|
- break;
|
|
|
- }
|
|
|
- break;
|
|
|
- case Illistening:
|
|
|
- freeblist(bp);
|
|
|
- break;
|
|
|
- case Ilclosing:
|
|
|
- switch(h->iltype) {
|
|
|
- case Ilclose:
|
|
|
- ic->recvd = id;
|
|
|
- ilsendctl(s, nil, Ilclose, ic->next, ic->recvd, 0);
|
|
|
- if(ack == ic->next)
|
|
|
- ilhangup(s, nil);
|
|
|
- break;
|
|
|
- default:
|
|
|
- break;
|
|
|
- }
|
|
|
- freeblist(bp);
|
|
|
- break;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-void
|
|
|
-ilrexmit(Ilcb *ic)
|
|
|
-{
|
|
|
- Ilhdr *h;
|
|
|
- Block *nb;
|
|
|
- Conv *c;
|
|
|
- ulong id;
|
|
|
- Ilpriv *priv;
|
|
|
-
|
|
|
- nb = nil;
|
|
|
- qlock(&ic->ackq);
|
|
|
- if(ic->unacked)
|
|
|
- nb = copyblock(ic->unacked, blocklen(ic->unacked));
|
|
|
- qunlock(&ic->ackq);
|
|
|
-
|
|
|
- if(nb == nil)
|
|
|
- return;
|
|
|
-
|
|
|
- h = (Ilhdr*)nb->rp;
|
|
|
- h->vihl = IP_VER4;
|
|
|
-
|
|
|
- h->iltype = Ildataquery;
|
|
|
- hnputl(h->ilack, ic->recvd);
|
|
|
- h->ilspec = ilnextqt(ic);
|
|
|
- h->ilsum[0] = 0;
|
|
|
- h->ilsum[1] = 0;
|
|
|
- hnputs(h->ilsum, ptclcsum(nb, IL_IPSIZE, nhgets(h->illen)));
|
|
|
-
|
|
|
- c = ic->conv;
|
|
|
- id = nhgetl(h->ilid);
|
|
|
- netlog(c->p->f, Logil, "il: rexmit %d %ud: %d %d: %i %d/%d\n", id, ic->recvd,
|
|
|
- ic->rexmit, ic->timeout,
|
|
|
- c->raddr, c->lport, c->rport);
|
|
|
-
|
|
|
- ilbackoff(ic);
|
|
|
-
|
|
|
- ipoput4(c->p->f, nb, 0, c->ttl, c->tos, c);
|
|
|
-
|
|
|
- /* statistics */
|
|
|
- ic->rxtot++;
|
|
|
- priv = c->p->priv;
|
|
|
- priv->rexmit++;
|
|
|
-}
|
|
|
-
|
|
|
-/* DEBUG */
|
|
|
-void
|
|
|
-ilprocess(Conv *s, Ilhdr *h, Block *bp)
|
|
|
-{
|
|
|
- Ilcb *ic;
|
|
|
-
|
|
|
- ic = (Ilcb*)s->ptcl;
|
|
|
-
|
|
|
- USED(ic);
|
|
|
- netlog(s->p->f, Logilmsg, "%11s rcv %d/%d snt %d/%d pkt(%s id %d ack %d %d->%d) ",
|
|
|
- ilstates[ic->state], ic->rstart, ic->recvd, ic->start,
|
|
|
- ic->next, iltype[h->iltype], nhgetl(h->ilid),
|
|
|
- nhgetl(h->ilack), nhgets(h->ilsrc), nhgets(h->ildst));
|
|
|
-
|
|
|
- _ilprocess(s, h, bp);
|
|
|
-
|
|
|
- netlog(s->p->f, Logilmsg, "%11s rcv %d snt %d\n", ilstates[ic->state], ic->recvd, ic->next);
|
|
|
-}
|
|
|
-
|
|
|
-void
|
|
|
-ilhangup(Conv *s, char *msg)
|
|
|
-{
|
|
|
- Ilcb *ic;
|
|
|
- int callout;
|
|
|
-
|
|
|
- netlog(s->p->f, Logil, "il: hangup! %I %d/%d: %s\n", s->raddr,
|
|
|
- s->lport, s->rport, msg?msg:"no reason");
|
|
|
-
|
|
|
- ic = (Ilcb*)s->ptcl;
|
|
|
- callout = ic->state == Ilsyncer;
|
|
|
- illocalclose(s);
|
|
|
-
|
|
|
- qhangup(s->rq, msg);
|
|
|
- qhangup(s->wq, msg);
|
|
|
-
|
|
|
- if(callout)
|
|
|
- Fsconnected(s, msg);
|
|
|
-}
|
|
|
-
|
|
|
-void
|
|
|
-ilpullup(Conv *s)
|
|
|
-{
|
|
|
- Ilcb *ic;
|
|
|
- Ilhdr *oh;
|
|
|
- Block *bp;
|
|
|
- ulong oid, dlen;
|
|
|
- Ilpriv *ipriv;
|
|
|
-
|
|
|
- ic = (Ilcb*)s->ptcl;
|
|
|
- if(ic->state != Ilestablished)
|
|
|
- return;
|
|
|
-
|
|
|
- qlock(&ic->outo);
|
|
|
- while(ic->outoforder) {
|
|
|
- bp = ic->outoforder;
|
|
|
- oh = (Ilhdr*)bp->rp;
|
|
|
- oid = nhgetl(oh->ilid);
|
|
|
- if(oid <= ic->recvd) {
|
|
|
- ic->outoforder = bp->list;
|
|
|
- freeblist(bp);
|
|
|
- continue;
|
|
|
- }
|
|
|
- if(oid != ic->recvd+1){
|
|
|
- ipriv = s->p->priv;
|
|
|
- ipriv->stats[OutOfOrder]++;
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- ic->recvd = oid;
|
|
|
- ic->outoforder = bp->list;
|
|
|
-
|
|
|
- bp->list = nil;
|
|
|
- dlen = nhgets(oh->illen)-IL_HDRSIZE;
|
|
|
- bp = trimblock(bp, IL_IPSIZE+IL_HDRSIZE, dlen);
|
|
|
- /*
|
|
|
- * Upper levels don't know about multiple-block
|
|
|
- * messages so copy all into one (yick).
|
|
|
- */
|
|
|
- bp = concatblock(bp);
|
|
|
- if(bp == 0)
|
|
|
- panic("ilpullup");
|
|
|
- bp = packblock(bp);
|
|
|
- if(bp == 0)
|
|
|
- panic("ilpullup2");
|
|
|
- qpass(s->rq, bp);
|
|
|
- }
|
|
|
- qunlock(&ic->outo);
|
|
|
-}
|
|
|
-
|
|
|
-void
|
|
|
-iloutoforder(Conv *s, Ilhdr *h, Block *bp)
|
|
|
-{
|
|
|
- Ilcb *ic;
|
|
|
- uchar *lid;
|
|
|
- Block *f, **l;
|
|
|
- ulong id, newid;
|
|
|
- Ilpriv *ipriv;
|
|
|
-
|
|
|
- ipriv = s->p->priv;
|
|
|
- ic = (Ilcb*)s->ptcl;
|
|
|
- bp->list = nil;
|
|
|
-
|
|
|
- id = nhgetl(h->ilid);
|
|
|
- /* Window checks */
|
|
|
- if(id <= ic->recvd || id > ic->recvd+ic->window) {
|
|
|
- netlog(s->p->f, Logil, "il: message outside window %ud <%ud-%ud>: %i %d/%d\n",
|
|
|
- id, ic->recvd, ic->recvd+ic->window, s->raddr, s->lport, s->rport);
|
|
|
- freeblist(bp);
|
|
|
- return;
|
|
|
- }
|
|
|
-
|
|
|
- /* Packet is acceptable so sort onto receive queue for pullup */
|
|
|
- qlock(&ic->outo);
|
|
|
- if(ic->outoforder == nil)
|
|
|
- ic->outoforder = bp;
|
|
|
- else {
|
|
|
- l = &ic->outoforder;
|
|
|
- for(f = *l; f; f = f->list) {
|
|
|
- lid = ((Ilhdr*)(f->rp))->ilid;
|
|
|
- newid = nhgetl(lid);
|
|
|
- if(id <= newid) {
|
|
|
- if(id == newid) {
|
|
|
- ipriv->stats[DupMsg]++;
|
|
|
- ipriv->stats[DupBytes] += blocklen(bp);
|
|
|
- qunlock(&ic->outo);
|
|
|
- freeblist(bp);
|
|
|
- return;
|
|
|
- }
|
|
|
- bp->list = f;
|
|
|
- *l = bp;
|
|
|
- qunlock(&ic->outo);
|
|
|
- return;
|
|
|
- }
|
|
|
- l = &f->list;
|
|
|
- }
|
|
|
- *l = bp;
|
|
|
- }
|
|
|
- qunlock(&ic->outo);
|
|
|
-}
|
|
|
-
|
|
|
-void
|
|
|
-ilsendctl(Conv *ipc, Ilhdr *inih, int type, ulong id, ulong ack, int ilspec)
|
|
|
-{
|
|
|
- Ilhdr *ih;
|
|
|
- Ilcb *ic;
|
|
|
- Block *bp;
|
|
|
- int ttl, tos;
|
|
|
-
|
|
|
- bp = allocb(IL_IPSIZE+IL_HDRSIZE);
|
|
|
- bp->wp += IL_IPSIZE+IL_HDRSIZE;
|
|
|
-
|
|
|
- ih = (Ilhdr *)(bp->rp);
|
|
|
- ih->vihl = IP_VER4;
|
|
|
-
|
|
|
- /* Ip fields */
|
|
|
- ih->proto = IP_ILPROTO;
|
|
|
- hnputs(ih->illen, IL_HDRSIZE);
|
|
|
- ih->frag[0] = 0;
|
|
|
- ih->frag[1] = 0;
|
|
|
- if(inih) {
|
|
|
- hnputl(ih->dst, nhgetl(inih->src));
|
|
|
- hnputl(ih->src, nhgetl(inih->dst));
|
|
|
- hnputs(ih->ilsrc, nhgets(inih->ildst));
|
|
|
- hnputs(ih->ildst, nhgets(inih->ilsrc));
|
|
|
- hnputl(ih->ilid, nhgetl(inih->ilack));
|
|
|
- hnputl(ih->ilack, nhgetl(inih->ilid));
|
|
|
- ttl = MAXTTL;
|
|
|
- tos = DFLTTOS;
|
|
|
- }
|
|
|
- else {
|
|
|
- v6tov4(ih->dst, ipc->raddr);
|
|
|
- v6tov4(ih->src, ipc->laddr);
|
|
|
- hnputs(ih->ilsrc, ipc->lport);
|
|
|
- hnputs(ih->ildst, ipc->rport);
|
|
|
- hnputl(ih->ilid, id);
|
|
|
- hnputl(ih->ilack, ack);
|
|
|
- ic = (Ilcb*)ipc->ptcl;
|
|
|
- ic->acksent = ack;
|
|
|
- ic->acktime = NOW;
|
|
|
- ttl = ipc->ttl;
|
|
|
- tos = ipc->tos;
|
|
|
- }
|
|
|
- ih->iltype = type;
|
|
|
- ih->ilspec = ilspec;
|
|
|
- ih->ilsum[0] = 0;
|
|
|
- ih->ilsum[1] = 0;
|
|
|
-
|
|
|
- if(ilcksum)
|
|
|
- hnputs(ih->ilsum, ptclcsum(bp, IL_IPSIZE, IL_HDRSIZE));
|
|
|
-
|
|
|
-if(ipc==nil)
|
|
|
- panic("ipc is nil caller is %#p", getcallerpc(&ipc));
|
|
|
-if(ipc->p==nil)
|
|
|
- panic("ipc->p is nil");
|
|
|
-
|
|
|
- netlog(ipc->p->f, Logilmsg, "ctl(%s id %d ack %d %d->%d)\n",
|
|
|
- iltype[ih->iltype], nhgetl(ih->ilid), nhgetl(ih->ilack),
|
|
|
- nhgets(ih->ilsrc), nhgets(ih->ildst));
|
|
|
-
|
|
|
- ipoput4(ipc->p->f, bp, 0, ttl, tos, ipc);
|
|
|
-}
|
|
|
-
|
|
|
-void
|
|
|
-ilreject(Fs *f, Ilhdr *inih)
|
|
|
-{
|
|
|
- Ilhdr *ih;
|
|
|
- Block *bp;
|
|
|
-
|
|
|
- bp = allocb(IL_IPSIZE+IL_HDRSIZE);
|
|
|
- bp->wp += IL_IPSIZE+IL_HDRSIZE;
|
|
|
-
|
|
|
- ih = (Ilhdr *)(bp->rp);
|
|
|
- ih->vihl = IP_VER4;
|
|
|
-
|
|
|
- /* Ip fields */
|
|
|
- ih->proto = IP_ILPROTO;
|
|
|
- hnputs(ih->illen, IL_HDRSIZE);
|
|
|
- ih->frag[0] = 0;
|
|
|
- ih->frag[1] = 0;
|
|
|
- hnputl(ih->dst, nhgetl(inih->src));
|
|
|
- hnputl(ih->src, nhgetl(inih->dst));
|
|
|
- hnputs(ih->ilsrc, nhgets(inih->ildst));
|
|
|
- hnputs(ih->ildst, nhgets(inih->ilsrc));
|
|
|
- hnputl(ih->ilid, nhgetl(inih->ilack));
|
|
|
- hnputl(ih->ilack, nhgetl(inih->ilid));
|
|
|
- ih->iltype = Ilclose;
|
|
|
- ih->ilspec = 0;
|
|
|
- ih->ilsum[0] = 0;
|
|
|
- ih->ilsum[1] = 0;
|
|
|
-
|
|
|
- if(ilcksum)
|
|
|
- hnputs(ih->ilsum, ptclcsum(bp, IL_IPSIZE, IL_HDRSIZE));
|
|
|
-
|
|
|
- ipoput4(f, bp, 0, MAXTTL, DFLTTOS, nil);
|
|
|
-}
|
|
|
-
|
|
|
-void
|
|
|
-ilsettimeout(Ilcb *ic)
|
|
|
-{
|
|
|
- ulong pt;
|
|
|
-
|
|
|
- pt = (ic->delay>>LogAGain)
|
|
|
- + ic->unackedbytes/(ic->rate>>LogAGain)
|
|
|
- + (ic->mdev>>(LogDGain-1))
|
|
|
- + AckDelay;
|
|
|
- if(pt > MaxTimeout)
|
|
|
- pt = MaxTimeout;
|
|
|
- ic->timeout = NOW + pt;
|
|
|
-}
|
|
|
-
|
|
|
-void
|
|
|
-ilbackoff(Ilcb *ic)
|
|
|
-{
|
|
|
- ulong pt;
|
|
|
- int i;
|
|
|
-
|
|
|
- pt = (ic->delay>>LogAGain)
|
|
|
- + ic->unackedbytes/(ic->rate>>LogAGain)
|
|
|
- + (ic->mdev>>(LogDGain-1))
|
|
|
- + AckDelay;
|
|
|
- for(i = 0; i < ic->rexmit; i++)
|
|
|
- pt = pt + (pt>>1);
|
|
|
- if(pt > MaxTimeout)
|
|
|
- pt = MaxTimeout;
|
|
|
- ic->timeout = NOW + pt;
|
|
|
-
|
|
|
- if(ic->fasttimeout)
|
|
|
- ic->timeout = NOW+Iltickms;
|
|
|
-
|
|
|
- ic->rexmit++;
|
|
|
-}
|
|
|
-
|
|
|
-// complain if two numbers not within an hour of each other
|
|
|
-#define Tfuture (1000*60*60)
|
|
|
-int
|
|
|
-later(ulong t1, ulong t2, char *x)
|
|
|
-{
|
|
|
- int dt;
|
|
|
-
|
|
|
- dt = t1 - t2;
|
|
|
- if(dt > 0) {
|
|
|
- if(x != nil && dt > Tfuture)
|
|
|
- print("%s: way future %d\n", x, dt);
|
|
|
- return 1;
|
|
|
- }
|
|
|
- if(dt < -Tfuture) {
|
|
|
- if(x != nil)
|
|
|
- print("%s: way past %d\n", x, -dt);
|
|
|
- return 1;
|
|
|
- }
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-void
|
|
|
-ilackproc(void *x)
|
|
|
-{
|
|
|
- Ilcb *ic;
|
|
|
- Conv **s, *p;
|
|
|
- Proto *il;
|
|
|
-
|
|
|
- il = x;
|
|
|
-
|
|
|
-loop:
|
|
|
- tsleep(&up->sleep, return0, 0, Iltickms);
|
|
|
- for(s = il->conv; s && *s; s++) {
|
|
|
- p = *s;
|
|
|
- ic = (Ilcb*)p->ptcl;
|
|
|
-
|
|
|
- switch(ic->state) {
|
|
|
- case Ilclosed:
|
|
|
- case Illistening:
|
|
|
- break;
|
|
|
- case Ilclosing:
|
|
|
- if(later(NOW, ic->timeout, "timeout0")) {
|
|
|
- if(ic->rexmit > MaxRexmit){
|
|
|
- ilhangup(p, nil);
|
|
|
- break;
|
|
|
- }
|
|
|
- ilsendctl(p, nil, Ilclose, ic->next, ic->recvd, 0);
|
|
|
- ilbackoff(ic);
|
|
|
- }
|
|
|
- break;
|
|
|
-
|
|
|
- case Ilsyncee:
|
|
|
- case Ilsyncer:
|
|
|
- if(later(NOW, ic->timeout, "timeout1")) {
|
|
|
- if(ic->rexmit > MaxRexmit){
|
|
|
- ilhangup(p, etime);
|
|
|
- break;
|
|
|
- }
|
|
|
- ilsendctl(p, nil, Ilsync, ic->start, ic->recvd, 0);
|
|
|
- ilbackoff(ic);
|
|
|
- }
|
|
|
- break;
|
|
|
-
|
|
|
- case Ilestablished:
|
|
|
- if(ic->recvd != ic->acksent)
|
|
|
- if(later(NOW, ic->acktime, "acktime"))
|
|
|
- ilsendctl(p, nil, Ilack, ic->next, ic->recvd, 0);
|
|
|
-
|
|
|
- if(later(NOW, ic->querytime, "querytime")){
|
|
|
- if(later(NOW, ic->lastrecv+DeathTime, "deathtime")){
|
|
|
- netlog(il->f, Logil, "il: hangup: deathtime\n");
|
|
|
- ilhangup(p, etime);
|
|
|
- break;
|
|
|
- }
|
|
|
- ilsendctl(p, nil, Ilquery, ic->next, ic->recvd, ilnextqt(ic));
|
|
|
- ic->querytime = NOW + QueryTime;
|
|
|
- }
|
|
|
-
|
|
|
- if(ic->unacked != nil)
|
|
|
- if(later(NOW, ic->timeout, "timeout2")) {
|
|
|
- if(ic->rexmit > MaxRexmit){
|
|
|
- netlog(il->f, Logil, "il: hangup: too many rexmits\n");
|
|
|
- ilhangup(p, etime);
|
|
|
- break;
|
|
|
- }
|
|
|
- ilsendctl(p, nil, Ilquery, ic->next, ic->recvd, ilnextqt(ic));
|
|
|
- ic->rxquery++;
|
|
|
- ilbackoff(ic);
|
|
|
- }
|
|
|
- break;
|
|
|
- }
|
|
|
- }
|
|
|
- goto loop;
|
|
|
-}
|
|
|
-
|
|
|
-void
|
|
|
-ilcbinit(Ilcb *ic)
|
|
|
-{
|
|
|
- ic->start = nrand(0x1000000);
|
|
|
- ic->next = ic->start+1;
|
|
|
- ic->recvd = 0;
|
|
|
- ic->window = Defaultwin;
|
|
|
- ic->unackedbytes = 0;
|
|
|
- ic->unacked = nil;
|
|
|
- ic->outoforder = nil;
|
|
|
- ic->rexmit = 0;
|
|
|
- ic->rxtot = 0;
|
|
|
- ic->rxquery = 0;
|
|
|
- ic->qtx = 1;
|
|
|
- ic->fasttimeout = 0;
|
|
|
-
|
|
|
- /* timers */
|
|
|
- ic->delay = DefRtt<<LogAGain;
|
|
|
- ic->mdev = DefRtt<<LogDGain;
|
|
|
- ic->rate = DefByteRate<<LogAGain;
|
|
|
- ic->querytime = NOW + QueryTime;
|
|
|
- ic->lastrecv = NOW; /* or we'll timeout right away */
|
|
|
- ilsettimeout(ic);
|
|
|
-}
|
|
|
-
|
|
|
-char*
|
|
|
-ilstart(Conv *c, int type, int fasttimeout)
|
|
|
-{
|
|
|
- Ilcb *ic;
|
|
|
- Ilpriv *ipriv;
|
|
|
- char kpname[KNAMELEN];
|
|
|
-
|
|
|
- ipriv = c->p->priv;
|
|
|
-
|
|
|
- if(ipriv->ackprocstarted == 0){
|
|
|
- qlock(&ipriv->apl);
|
|
|
- if(ipriv->ackprocstarted == 0){
|
|
|
- sprint(kpname, "#I%dilack", c->p->f->dev);
|
|
|
- kproc(kpname, ilackproc, c->p);
|
|
|
- ipriv->ackprocstarted = 1;
|
|
|
- }
|
|
|
- qunlock(&ipriv->apl);
|
|
|
- }
|
|
|
-
|
|
|
- ic = (Ilcb*)c->ptcl;
|
|
|
- ic->conv = c;
|
|
|
-
|
|
|
- if(ic->state != Ilclosed)
|
|
|
- return nil;
|
|
|
-
|
|
|
- ilcbinit(ic);
|
|
|
-
|
|
|
- if(fasttimeout){
|
|
|
- /* timeout if we can't connect quickly */
|
|
|
- ic->fasttimeout = 1;
|
|
|
- ic->timeout = NOW+Iltickms;
|
|
|
- ic->rexmit = MaxRexmit - 4;
|
|
|
- };
|
|
|
-
|
|
|
- switch(type) {
|
|
|
- default:
|
|
|
- netlog(c->p->f, Logil, "il: start: type %d\n", type);
|
|
|
- break;
|
|
|
- case IL_LISTEN:
|
|
|
- ic->state = Illistening;
|
|
|
- iphtadd(&ipriv->ht, c);
|
|
|
- break;
|
|
|
- case IL_CONNECT:
|
|
|
- ic->state = Ilsyncer;
|
|
|
- iphtadd(&ipriv->ht, c);
|
|
|
- ilsendctl(c, nil, Ilsync, ic->start, ic->recvd, 0);
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- return nil;
|
|
|
-}
|
|
|
-
|
|
|
-void
|
|
|
-ilfreeq(Ilcb *ic)
|
|
|
-{
|
|
|
- Block *bp, *next;
|
|
|
-
|
|
|
- qlock(&ic->ackq);
|
|
|
- for(bp = ic->unacked; bp; bp = next) {
|
|
|
- next = bp->list;
|
|
|
- freeblist(bp);
|
|
|
- }
|
|
|
- ic->unacked = nil;
|
|
|
- qunlock(&ic->ackq);
|
|
|
-
|
|
|
- qlock(&ic->outo);
|
|
|
- for(bp = ic->outoforder; bp; bp = next) {
|
|
|
- next = bp->list;
|
|
|
- freeblist(bp);
|
|
|
- }
|
|
|
- ic->outoforder = nil;
|
|
|
- qunlock(&ic->outo);
|
|
|
-}
|
|
|
-
|
|
|
-void
|
|
|
-iladvise(Proto *il, Block *bp, char *msg)
|
|
|
-{
|
|
|
- Ilhdr *h;
|
|
|
- Ilcb *ic;
|
|
|
- uchar source[IPaddrlen], dest[IPaddrlen];
|
|
|
- ushort psource;
|
|
|
- Conv *s, **p;
|
|
|
-
|
|
|
- h = (Ilhdr*)(bp->rp);
|
|
|
-
|
|
|
- v4tov6(dest, h->dst);
|
|
|
- v4tov6(source, h->src);
|
|
|
- psource = nhgets(h->ilsrc);
|
|
|
-
|
|
|
-
|
|
|
- /* Look for a connection, unfortunately the destination port is missing */
|
|
|
- qlock(il);
|
|
|
- for(p = il->conv; *p; p++) {
|
|
|
- s = *p;
|
|
|
- if(s->lport == psource)
|
|
|
- if(ipcmp(s->laddr, source) == 0)
|
|
|
- if(ipcmp(s->raddr, dest) == 0){
|
|
|
- qunlock(il);
|
|
|
- ic = (Ilcb*)s->ptcl;
|
|
|
- switch(ic->state){
|
|
|
- case Ilsyncer:
|
|
|
- ilhangup(s, msg);
|
|
|
- break;
|
|
|
- }
|
|
|
- freeblist(bp);
|
|
|
- return;
|
|
|
- }
|
|
|
- }
|
|
|
- qunlock(il);
|
|
|
- freeblist(bp);
|
|
|
-}
|
|
|
-
|
|
|
-int
|
|
|
-ilnextqt(Ilcb *ic)
|
|
|
-{
|
|
|
- int x;
|
|
|
-
|
|
|
- qlock(&ic->ackq);
|
|
|
- x = ic->qtx;
|
|
|
- if(++x > Nqt)
|
|
|
- x = 1;
|
|
|
- ic->qtx = x;
|
|
|
- ic->qt[x] = ic->next-1; /* highest xmitted packet */
|
|
|
- ic->qt[0] = ic->qt[x]; /* compatibility with old implementations */
|
|
|
- qunlock(&ic->ackq);
|
|
|
-
|
|
|
- return x;
|
|
|
-}
|
|
|
-
|
|
|
-/* calculate scale constants that converts fast ticks to ms (more or less) */
|
|
|
-static void
|
|
|
-inittimescale(void)
|
|
|
-{
|
|
|
- uvlong hz;
|
|
|
-
|
|
|
- fastticks(&hz);
|
|
|
- if(hz > 1000){
|
|
|
- scalediv = hz/1000;
|
|
|
- scalemul = 1;
|
|
|
- } else {
|
|
|
- scalediv = 1;
|
|
|
- scalemul = 1000/hz;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-void
|
|
|
-ilinit(Fs *f)
|
|
|
-{
|
|
|
- Proto *il;
|
|
|
-
|
|
|
- inittimescale();
|
|
|
-
|
|
|
- il = smalloc(sizeof(Proto));
|
|
|
- il->priv = smalloc(sizeof(Ilpriv));
|
|
|
- il->name = "il";
|
|
|
- il->connect = ilconnect;
|
|
|
- il->announce = ilannounce;
|
|
|
- il->state = ilstate;
|
|
|
- il->create = ilcreate;
|
|
|
- il->close = ilclose;
|
|
|
- il->rcv = iliput;
|
|
|
- il->ctl = nil;
|
|
|
- il->advise = iladvise;
|
|
|
- il->stats = ilxstats;
|
|
|
- il->inuse = ilinuse;
|
|
|
- il->gc = nil;
|
|
|
- il->ipproto = IP_ILPROTO;
|
|
|
- il->nc = scalednconv();
|
|
|
- il->ptclsize = sizeof(Ilcb);
|
|
|
- Fsproto(f, il);
|
|
|
-}
|
David du Colombier