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@@ -1,2316 +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/netif.h"
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-#include "../port/error.h"
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-
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-#include <libsec.h>
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-#include "../port/thwack.h"
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-
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-/*
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- * sdp - secure datagram protocol
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- */
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-
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-typedef struct Sdp Sdp;
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-typedef struct Conv Conv;
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-typedef struct OneWay OneWay;
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-typedef struct Stats Stats;
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-typedef struct AckPkt AckPkt;
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-typedef struct Algorithm Algorithm;
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-typedef struct CipherRc4 CipherRc4;
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-
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-enum
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-{
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- Qtopdir= 1, /* top level directory */
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-
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- Qsdpdir, /* sdp directory */
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- Qclone,
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- Qlog,
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-
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- Qconvdir, /* directory per conversation */
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- Qctl,
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- Qdata, /* unreliable packet channel */
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- Qcontrol, /* reliable control channel */
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- Qstatus,
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- Qstats,
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- Qrstats,
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-
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- MaxQ,
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-
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- Maxconv= 256, // power of 2
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- Nfs= 4, // number of file systems
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- MaxRetries= 12,
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- KeepAlive = 300, // keep alive in seconds - should probably be about 60 but is higher to avoid linksys bug
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- SecretLength= 32, // a secret per direction
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- SeqMax = (1<<24),
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- SeqWindow = 32,
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- NCompStats = 8,
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-};
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-
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-#define TYPE(x) (((ulong)(x).path) & 0xff)
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-#define CONV(x) ((((ulong)(x).path) >> 8)&(Maxconv-1))
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-#define QID(x, y) (((x)<<8) | (y))
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-
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-struct Stats
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-{
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- ulong outPackets;
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- ulong outDataPackets;
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- ulong outDataBytes;
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- ulong outCompDataBytes;
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- ulong outCompBytes;
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- ulong outCompStats[NCompStats];
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- ulong inPackets;
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- ulong inDataPackets;
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- ulong inDataBytes;
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- ulong inCompDataBytes;
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- ulong inMissing;
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- ulong inDup;
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- ulong inReorder;
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- ulong inBadComp;
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- ulong inBadAuth;
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- ulong inBadSeq;
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- ulong inBadOther;
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-};
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-
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-struct OneWay
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-{
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- Rendez statsready;
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-
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- ulong seqwrap; // number of wraps of the sequence number
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- ulong seq;
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- ulong window;
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-
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- uchar secret[SecretLength];
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-
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- QLock controllk;
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- Rendez controlready;
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- Block *controlpkt; // control channel
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- ulong controlseq;
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-
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- void *cipherstate; // state cipher
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- int cipherivlen; // initial vector length
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- int cipherblklen; // block length
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- int (*cipher)(OneWay*, uchar *buf, int len);
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-
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- void *authstate; // auth state
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- int authlen; // auth data length in bytes
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- int (*auth)(OneWay*, uchar *buf, int len);
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-
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- void *compstate;
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- int (*comp)(Conv*, int subtype, ulong seq, Block **);
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-};
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-
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-// conv states
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-enum {
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- CFree,
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- CInit,
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- CDial,
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- CAccept,
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- COpen,
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- CLocalClose,
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- CRemoteClose,
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- CClosed,
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-};
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-
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-struct Conv {
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- QLock;
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- Sdp *sdp;
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- int id;
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-
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- int ref; // holds conv up
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-
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- int state;
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-
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- int dataopen; // ref count of opens on Qdata
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- int controlopen; // ref count of opens on Qcontrol
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- int reader; // reader proc has been started
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-
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- Stats lstats;
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- Stats rstats;
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-
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- ulong lastrecv; // time last packet was received
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- ulong timeout;
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- int retries;
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-
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- // the following pair uniquely define conversation on this port
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- ulong dialid;
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- ulong acceptid;
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-
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- QLock readlk; // protects readproc
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- Proc *readproc;
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-
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- Chan *chan; // packet channel
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- char *channame;
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-
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- char owner[KNAMELEN]; /* protections */
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- int perm;
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-
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- Algorithm *auth;
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- Algorithm *cipher;
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- Algorithm *comp;
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-
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- int drop;
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-
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- OneWay in;
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- OneWay out;
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-};
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-
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-struct Sdp {
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- QLock;
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- Log;
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- int nconv;
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- Conv *conv[Maxconv];
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- int ackproc;
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-};
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-
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-enum {
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- TConnect,
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- TControl,
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- TData,
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- TCompData,
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-};
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-
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-enum {
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- ControlMesg,
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- ControlAck,
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-};
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-
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-enum {
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- ThwackU,
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- ThwackC,
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-};
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-
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-enum {
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- ConOpenRequest,
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- ConOpenAck,
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- ConOpenAckAck,
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- ConClose,
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- ConCloseAck,
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- ConReset,
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-};
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-
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-struct AckPkt
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-{
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- uchar cseq[4];
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- uchar outPackets[4];
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- uchar outDataPackets[4];
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- uchar outDataBytes[4];
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- uchar outCompDataBytes[4];
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- uchar outCompStats[4*NCompStats];
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- uchar inPackets[4];
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- uchar inDataPackets[4];
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- uchar inDataBytes[4];
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- uchar inCompDataBytes[4];
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- uchar inMissing[4];
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- uchar inDup[4];
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- uchar inReorder[4];
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- uchar inBadComp[4];
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- uchar inBadAuth[4];
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- uchar inBadSeq[4];
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- uchar inBadOther[4];
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-};
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-
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-struct Algorithm
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-{
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- char *name;
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- int keylen; // in bytes
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- void (*init)(Conv*);
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-};
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-
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-enum {
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- RC4forward = 10*1024*1024, // maximum skip forward
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- RC4back = 100*1024, // maximum look back
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-};
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-
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-struct CipherRc4
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-{
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- ulong cseq; // current byte sequence number
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- RC4state current;
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-
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- int ovalid; // old is valid
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- ulong lgseq; // last good sequence
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- ulong oseq; // old byte sequence number
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- RC4state old;
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-};
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-
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-static Dirtab sdpdirtab[]={
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- "log", {Qlog}, 0, 0666,
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- "clone", {Qclone}, 0, 0666,
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-};
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-
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-static Dirtab convdirtab[]={
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- "ctl", {Qctl}, 0, 0666,
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- "data", {Qdata}, 0, 0666,
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- "control", {Qcontrol}, 0, 0666,
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- "status", {Qstatus}, 0, 0444,
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- "stats", {Qstats}, 0, 0444,
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- "rstats", {Qrstats}, 0, 0444,
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-};
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-
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-static int m2p[] = {
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- [OREAD] 4,
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- [OWRITE] 2,
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- [ORDWR] 6
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-};
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-
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-enum {
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- Logcompress= (1<<0),
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- Logauth= (1<<1),
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- Loghmac= (1<<2),
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-};
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-
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-static Logflag logflags[] =
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-{
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- { "compress", Logcompress, },
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- { "auth", Logauth, },
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- { "hmac", Loghmac, },
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- { nil, 0, },
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-};
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-
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-static Dirtab *dirtab[MaxQ];
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-static Sdp sdptab[Nfs];
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-static char *convstatename[] = {
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- [CFree] "Free",
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- [CInit] "Init",
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- [CDial] "Dial",
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- [CAccept] "Accept",
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- [COpen] "Open",
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- [CLocalClose] "LocalClose",
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- [CRemoteClose] "RemoteClose",
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- [CClosed] "Closed",
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-};
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-
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-static int sdpgen(Chan *c, char*, Dirtab*, int, int s, Dir *dp);
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-static Conv *sdpclone(Sdp *sdp);
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-static void sdpackproc(void *a);
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-static void onewaycleanup(OneWay *ow);
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-static int readready(void *a);
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-static int controlread();
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-static void convsetstate(Conv *c, int state);
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-static Block *readcontrol(Conv *c, int n);
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-static void writecontrol(Conv *c, void *p, int n, int wait);
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-static Block *readdata(Conv *c, int n);
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-static long writedata(Conv *c, Block *b);
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-static void convderef(Conv *c);
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-static Block *conviput(Conv *c, Block *b, int control);
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-static void conviconnect(Conv *c, int op, Block *b);
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-static void convicontrol(Conv *c, int op, Block *b);
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-static Block *convicomp(Conv *c, int op, ulong, Block *b);
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-static void convoput(Conv *c, int type, int subtype, Block *b);
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-static void convoconnect(Conv *c, int op, ulong dialid, ulong acceptid);
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-static void convopenchan(Conv *c, char *path);
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-static void convstats(Conv *c, int local, char *buf, int n);
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-static void convreader(void *a);
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-
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-static void setalg(Conv *c, char *name, Algorithm *tab, Algorithm **);
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-static void setsecret(OneWay *cc, char *secret);
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-
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-static void nullcipherinit(Conv*c);
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-static void descipherinit(Conv*c);
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-static void rc4cipherinit(Conv*c);
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-static void nullauthinit(Conv*c);
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-static void shaauthinit(Conv*c);
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-static void md5authinit(Conv*c);
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-static void nullcompinit(Conv*c);
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-static void thwackcompinit(Conv*c);
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-
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-static Algorithm cipheralg[] =
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-{
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- "null", 0, nullcipherinit,
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- "des_56_cbc", 7, descipherinit,
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- "rc4_128", 16, rc4cipherinit,
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- "rc4_256", 32, rc4cipherinit,
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- nil, 0, nil,
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-};
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-
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-static Algorithm authalg[] =
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-{
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- "null", 0, nullauthinit,
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- "hmac_sha1_96", 16, shaauthinit,
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- "hmac_md5_96", 16, md5authinit,
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- nil, 0, nil,
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-};
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-
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-static Algorithm compalg[] =
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-{
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- "null", 0, nullcompinit,
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- "thwack", 0, thwackcompinit,
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- nil, 0, nil,
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-};
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-
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-
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-static void
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-sdpinit(void)
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-{
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- int i;
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- Dirtab *dt;
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-
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- // setup dirtab with non directory entries
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- for(i=0; i<nelem(sdpdirtab); i++) {
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- dt = sdpdirtab + i;
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- dirtab[TYPE(dt->qid)] = dt;
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- }
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-
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- for(i=0; i<nelem(convdirtab); i++) {
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- dt = convdirtab + i;
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- dirtab[TYPE(dt->qid)] = dt;
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- }
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-
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-}
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-
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-static Chan*
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-sdpattach(char* spec)
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-{
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- Chan *c;
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- int dev;
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- char buf[100];
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- Sdp *sdp;
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- int start;
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-
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- dev = atoi(spec);
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- if(dev<0 || dev >= Nfs)
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- error("bad specification");
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-
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- c = devattach('E', spec);
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- c->qid = (Qid){QID(0, Qtopdir), 0, QTDIR};
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- c->dev = dev;
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-
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- sdp = sdptab + dev;
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- qlock(sdp);
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- start = sdp->ackproc == 0;
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- sdp->ackproc = 1;
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- qunlock(sdp);
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-
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- if(start) {
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- snprint(buf, sizeof(buf), "sdpackproc%d", dev);
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- kproc(buf, sdpackproc, sdp);
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- }
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-
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- return c;
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-}
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-
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-static Walkqid*
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-sdpwalk(Chan *c, Chan *nc, char **name, int nname)
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-{
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- return devwalk(c, nc, name, nname, 0, 0, sdpgen);
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-}
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-
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-static int
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-sdpstat(Chan* c, uchar* db, int n)
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-{
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- return devstat(c, db, n, nil, 0, sdpgen);
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-}
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-
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-static Chan*
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-sdpopen(Chan* ch, int omode)
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-{
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- int perm;
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- Sdp *sdp;
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- Conv *c;
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-
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- omode &= 3;
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- perm = m2p[omode];
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- USED(perm);
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-
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- sdp = sdptab + ch->dev;
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-
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- switch(TYPE(ch->qid)) {
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- default:
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- break;
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- case Qtopdir:
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- case Qsdpdir:
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- case Qconvdir:
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- if(omode != OREAD)
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- error(Eperm);
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- break;
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- case Qlog:
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- logopen(sdp);
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- break;
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- case Qclone:
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- c = sdpclone(sdp);
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- if(c == nil)
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- error(Enodev);
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- ch->qid.path = QID(c->id, Qctl);
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- break;
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- case Qdata:
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- case Qctl:
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- case Qstatus:
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- case Qcontrol:
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- case Qstats:
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- case Qrstats:
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- c = sdp->conv[CONV(ch->qid)];
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- qlock(c);
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- if(waserror()) {
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- qunlock(c);
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- nexterror();
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- }
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- if((perm & (c->perm>>6)) != perm)
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- if(strcmp(up->user, c->owner) != 0 || (perm & c->perm) != perm)
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- error(Eperm);
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-
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- c->ref++;
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- if(TYPE(ch->qid) == Qdata) {
|
|
|
- c->dataopen++;
|
|
|
- // kill reader if Qdata is opened for the first time
|
|
|
- if(c->dataopen == 1)
|
|
|
- if(c->readproc != nil)
|
|
|
- postnote(c->readproc, 1, "interrupt", 0);
|
|
|
- } else if(TYPE(ch->qid) == Qcontrol) {
|
|
|
- c->controlopen++;
|
|
|
- }
|
|
|
- qunlock(c);
|
|
|
- poperror();
|
|
|
- break;
|
|
|
- }
|
|
|
- ch->mode = openmode(omode);
|
|
|
- ch->flag |= COPEN;
|
|
|
- ch->offset = 0;
|
|
|
- return ch;
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-sdpclose(Chan* ch)
|
|
|
-{
|
|
|
- Sdp *sdp = sdptab + ch->dev;
|
|
|
- Conv *c;
|
|
|
-
|
|
|
- if(!(ch->flag & COPEN))
|
|
|
- return;
|
|
|
- switch(TYPE(ch->qid)) {
|
|
|
- case Qlog:
|
|
|
- logclose(sdp);
|
|
|
- break;
|
|
|
- case Qctl:
|
|
|
- case Qstatus:
|
|
|
- case Qstats:
|
|
|
- case Qrstats:
|
|
|
- c = sdp->conv[CONV(ch->qid)];
|
|
|
- qlock(c);
|
|
|
- convderef(c);
|
|
|
- qunlock(c);
|
|
|
- break;
|
|
|
-
|
|
|
- case Qdata:
|
|
|
- c = sdp->conv[CONV(ch->qid)];
|
|
|
- qlock(c);
|
|
|
- c->dataopen--;
|
|
|
- convderef(c);
|
|
|
- if(c->dataopen == 0)
|
|
|
- if(c->reader == 0)
|
|
|
- if(c->chan != nil)
|
|
|
- if(!waserror()) {
|
|
|
- kproc("convreader", convreader, c);
|
|
|
- c->reader = 1;
|
|
|
- c->ref++;
|
|
|
- poperror();
|
|
|
- }
|
|
|
- qunlock(c);
|
|
|
- break;
|
|
|
-
|
|
|
- case Qcontrol:
|
|
|
- c = sdp->conv[CONV(ch->qid)];
|
|
|
- qlock(c);
|
|
|
- c->controlopen--;
|
|
|
- convderef(c);
|
|
|
- if(c->controlopen == 0 && c->ref != 0) {
|
|
|
- switch(c->state) {
|
|
|
- default:
|
|
|
- convsetstate(c, CClosed);
|
|
|
- break;
|
|
|
- case CAccept:
|
|
|
- case COpen:
|
|
|
- convsetstate(c, CLocalClose);
|
|
|
- break;
|
|
|
- }
|
|
|
- }
|
|
|
- qunlock(c);
|
|
|
- break;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static long
|
|
|
-sdpread(Chan *ch, void *a, long n, vlong off)
|
|
|
-{
|
|
|
- char buf[256];
|
|
|
- char *s;
|
|
|
- Sdp *sdp = sdptab + ch->dev;
|
|
|
- Conv *c;
|
|
|
- Block *b;
|
|
|
- int rv;
|
|
|
-
|
|
|
- USED(off);
|
|
|
- switch(TYPE(ch->qid)) {
|
|
|
- default:
|
|
|
- error(Eperm);
|
|
|
- case Qtopdir:
|
|
|
- case Qsdpdir:
|
|
|
- case Qconvdir:
|
|
|
- return devdirread(ch, a, n, 0, 0, sdpgen);
|
|
|
- case Qlog:
|
|
|
- return logread(sdp, a, off, n);
|
|
|
- case Qstatus:
|
|
|
- c = sdp->conv[CONV(ch->qid)];
|
|
|
- qlock(c);
|
|
|
- n = readstr(off, a, n, convstatename[c->state]);
|
|
|
- qunlock(c);
|
|
|
- return n;
|
|
|
- case Qctl:
|
|
|
- sprint(buf, "%lud", CONV(ch->qid));
|
|
|
- return readstr(off, a, n, buf);
|
|
|
- case Qcontrol:
|
|
|
- b = readcontrol(sdp->conv[CONV(ch->qid)], n);
|
|
|
- if(b == nil)
|
|
|
- return 0;
|
|
|
- if(BLEN(b) < n)
|
|
|
- n = BLEN(b);
|
|
|
- memmove(a, b->rp, n);
|
|
|
- freeb(b);
|
|
|
- return n;
|
|
|
- case Qdata:
|
|
|
- b = readdata(sdp->conv[CONV(ch->qid)], n);
|
|
|
- if(b == nil)
|
|
|
- return 0;
|
|
|
- if(BLEN(b) < n)
|
|
|
- n = BLEN(b);
|
|
|
- memmove(a, b->rp, n);
|
|
|
- freeb(b);
|
|
|
- return n;
|
|
|
- case Qstats:
|
|
|
- case Qrstats:
|
|
|
- c = sdp->conv[CONV(ch->qid)];
|
|
|
- s = smalloc(1000);
|
|
|
- convstats(c, TYPE(ch->qid) == Qstats, s, 1000);
|
|
|
- rv = readstr(off, a, n, s);
|
|
|
- free(s);
|
|
|
- return rv;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static Block*
|
|
|
-sdpbread(Chan* ch, long n, ulong offset)
|
|
|
-{
|
|
|
- Sdp *sdp = sdptab + ch->dev;
|
|
|
-
|
|
|
- if(TYPE(ch->qid) != Qdata)
|
|
|
- return devbread(ch, n, offset);
|
|
|
- return readdata(sdp->conv[CONV(ch->qid)], n);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static long
|
|
|
-sdpwrite(Chan *ch, void *a, long n, vlong off)
|
|
|
-{
|
|
|
- Sdp *sdp = sdptab + ch->dev;
|
|
|
- Cmdbuf *cb;
|
|
|
- char *arg0;
|
|
|
- char *p;
|
|
|
- Conv *c;
|
|
|
- Block *b;
|
|
|
-
|
|
|
- USED(off);
|
|
|
- switch(TYPE(ch->qid)) {
|
|
|
- default:
|
|
|
- error(Eperm);
|
|
|
- case Qctl:
|
|
|
- c = sdp->conv[CONV(ch->qid)];
|
|
|
- cb = parsecmd(a, n);
|
|
|
- qlock(c);
|
|
|
- if(waserror()) {
|
|
|
- qunlock(c);
|
|
|
- free(cb);
|
|
|
- nexterror();
|
|
|
- }
|
|
|
- if(cb->nf == 0)
|
|
|
- error("short write");
|
|
|
- arg0 = cb->f[0];
|
|
|
- if(strcmp(arg0, "accept") == 0) {
|
|
|
- if(cb->nf != 2)
|
|
|
- error("usage: accect file");
|
|
|
- convopenchan(c, cb->f[1]);
|
|
|
- } else if(strcmp(arg0, "dial") == 0) {
|
|
|
- if(cb->nf != 2)
|
|
|
- error("usage: accect file");
|
|
|
- convopenchan(c, cb->f[1]);
|
|
|
- convsetstate(c, CDial);
|
|
|
- } else if(strcmp(arg0, "drop") == 0) {
|
|
|
- if(cb->nf != 2)
|
|
|
- error("usage: drop permil");
|
|
|
- c->drop = atoi(cb->f[1]);
|
|
|
- } else if(strcmp(arg0, "cipher") == 0) {
|
|
|
- if(cb->nf != 2)
|
|
|
- error("usage: cipher alg");
|
|
|
- setalg(c, cb->f[1], cipheralg, &c->cipher);
|
|
|
- } else if(strcmp(arg0, "auth") == 0) {
|
|
|
- if(cb->nf != 2)
|
|
|
- error("usage: auth alg");
|
|
|
- setalg(c, cb->f[1], authalg, &c->auth);
|
|
|
- } else if(strcmp(arg0, "comp") == 0) {
|
|
|
- if(cb->nf != 2)
|
|
|
- error("usage: comp alg");
|
|
|
- setalg(c, cb->f[1], compalg, &c->comp);
|
|
|
- } else if(strcmp(arg0, "insecret") == 0) {
|
|
|
- if(cb->nf != 2)
|
|
|
- error("usage: insecret secret");
|
|
|
- setsecret(&c->in, cb->f[1]);
|
|
|
- if(c->cipher)
|
|
|
- c->cipher->init(c);
|
|
|
- if(c->auth)
|
|
|
- c->auth->init(c);
|
|
|
- } else if(strcmp(arg0, "outsecret") == 0) {
|
|
|
- if(cb->nf != 2)
|
|
|
- error("usage: outsecret secret");
|
|
|
- setsecret(&c->out, cb->f[1]);
|
|
|
- if(c->cipher)
|
|
|
- c->cipher->init(c);
|
|
|
- if(c->auth)
|
|
|
- c->auth->init(c);
|
|
|
- } else
|
|
|
- error("unknown control request");
|
|
|
- poperror();
|
|
|
- qunlock(c);
|
|
|
- free(cb);
|
|
|
- return n;
|
|
|
- case Qlog:
|
|
|
- cb = parsecmd(a, n);
|
|
|
- p = logctl(sdp, cb->nf, cb->f, logflags);
|
|
|
- free(cb);
|
|
|
- if(p != nil)
|
|
|
- error(p);
|
|
|
- return n;
|
|
|
- case Qcontrol:
|
|
|
- writecontrol(sdp->conv[CONV(ch->qid)], a, n, 0);
|
|
|
- return n;
|
|
|
- case Qdata:
|
|
|
- b = allocb(n);
|
|
|
- memmove(b->wp, a, n);
|
|
|
- b->wp += n;
|
|
|
- return writedata(sdp->conv[CONV(ch->qid)], b);
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-long
|
|
|
-sdpbwrite(Chan *ch, Block *bp, ulong offset)
|
|
|
-{
|
|
|
- Sdp *sdp = sdptab + ch->dev;
|
|
|
-
|
|
|
- if(TYPE(ch->qid) != Qdata)
|
|
|
- return devbwrite(ch, bp, offset);
|
|
|
- return writedata(sdp->conv[CONV(ch->qid)], bp);
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-sdpgen(Chan *c, char*, Dirtab*, int, int s, Dir *dp)
|
|
|
-{
|
|
|
- Sdp *sdp = sdptab + c->dev;
|
|
|
- int type = TYPE(c->qid);
|
|
|
- Dirtab *dt;
|
|
|
- Qid qid;
|
|
|
-
|
|
|
- if(s == DEVDOTDOT){
|
|
|
- switch(TYPE(c->qid)){
|
|
|
- case Qtopdir:
|
|
|
- case Qsdpdir:
|
|
|
- snprint(up->genbuf, sizeof(up->genbuf), "#E%ld", c->dev);
|
|
|
- mkqid(&qid, Qtopdir, 0, QTDIR);
|
|
|
- devdir(c, qid, up->genbuf, 0, eve, 0555, dp);
|
|
|
- break;
|
|
|
- case Qconvdir:
|
|
|
- snprint(up->genbuf, sizeof(up->genbuf), "%d", s);
|
|
|
- mkqid(&qid, Qsdpdir, 0, QTDIR);
|
|
|
- devdir(c, qid, up->genbuf, 0, eve, 0555, dp);
|
|
|
- break;
|
|
|
- default:
|
|
|
- panic("sdpwalk %llux", c->qid.path);
|
|
|
- }
|
|
|
- return 1;
|
|
|
- }
|
|
|
-
|
|
|
- switch(type) {
|
|
|
- default:
|
|
|
- // non directory entries end up here
|
|
|
- if(c->qid.type & QTDIR)
|
|
|
- panic("sdpgen: unexpected directory");
|
|
|
- if(s != 0)
|
|
|
- return -1;
|
|
|
- dt = dirtab[TYPE(c->qid)];
|
|
|
- if(dt == nil)
|
|
|
- panic("sdpgen: unknown type: %lud", TYPE(c->qid));
|
|
|
- devdir(c, c->qid, dt->name, dt->length, eve, dt->perm, dp);
|
|
|
- return 1;
|
|
|
- case Qtopdir:
|
|
|
- if(s != 0)
|
|
|
- return -1;
|
|
|
- mkqid(&qid, QID(0, Qsdpdir), 0, QTDIR);
|
|
|
- devdir(c, qid, "sdp", 0, eve, 0555, dp);
|
|
|
- return 1;
|
|
|
- case Qsdpdir:
|
|
|
- if(s<nelem(sdpdirtab)) {
|
|
|
- dt = sdpdirtab+s;
|
|
|
- devdir(c, dt->qid, dt->name, dt->length, eve, dt->perm, dp);
|
|
|
- return 1;
|
|
|
- }
|
|
|
- s -= nelem(sdpdirtab);
|
|
|
- if(s >= sdp->nconv)
|
|
|
- return -1;
|
|
|
- mkqid(&qid, QID(s, Qconvdir), 0, QTDIR);
|
|
|
- snprint(up->genbuf, sizeof(up->genbuf), "%d", s);
|
|
|
- devdir(c, qid, up->genbuf, 0, eve, 0555, dp);
|
|
|
- return 1;
|
|
|
- case Qconvdir:
|
|
|
- if(s>=nelem(convdirtab))
|
|
|
- return -1;
|
|
|
- dt = convdirtab+s;
|
|
|
- mkqid(&qid, QID(CONV(c->qid),TYPE(dt->qid)), 0, QTFILE);
|
|
|
- devdir(c, qid, dt->name, dt->length, eve, dt->perm, dp);
|
|
|
- return 1;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static Conv*
|
|
|
-sdpclone(Sdp *sdp)
|
|
|
-{
|
|
|
- Conv *c, **pp, **ep;
|
|
|
-
|
|
|
- c = nil;
|
|
|
- ep = sdp->conv + nelem(sdp->conv);
|
|
|
- qlock(sdp);
|
|
|
- if(waserror()) {
|
|
|
- qunlock(sdp);
|
|
|
- nexterror();
|
|
|
- }
|
|
|
- for(pp = sdp->conv; pp < ep; pp++) {
|
|
|
- c = *pp;
|
|
|
- if(c == nil){
|
|
|
- c = malloc(sizeof(Conv));
|
|
|
- if(c == nil)
|
|
|
- error(Enomem);
|
|
|
- memset(c, 0, sizeof(Conv));
|
|
|
- qlock(c);
|
|
|
- c->sdp = sdp;
|
|
|
- c->id = pp - sdp->conv;
|
|
|
- *pp = c;
|
|
|
- sdp->nconv++;
|
|
|
- break;
|
|
|
- }
|
|
|
- if(c->ref == 0 && canqlock(c)){
|
|
|
- if(c->ref == 0)
|
|
|
- break;
|
|
|
- qunlock(c);
|
|
|
- }
|
|
|
- }
|
|
|
- poperror();
|
|
|
- qunlock(sdp);
|
|
|
-
|
|
|
- if(pp >= ep)
|
|
|
- return nil;
|
|
|
-
|
|
|
- assert(c->state == CFree);
|
|
|
- // set ref to 2 - 1 ref for open - 1 ref for channel state
|
|
|
- c->ref = 2;
|
|
|
- c->state = CInit;
|
|
|
- c->in.window = ~0;
|
|
|
- strncpy(c->owner, up->user, sizeof(c->owner));
|
|
|
- c->perm = 0660;
|
|
|
- qunlock(c);
|
|
|
-
|
|
|
- return c;
|
|
|
-}
|
|
|
-
|
|
|
-// assume c is locked
|
|
|
-static void
|
|
|
-convretryinit(Conv *c)
|
|
|
-{
|
|
|
- c->retries = 0;
|
|
|
- // +2 to avoid rounding effects.
|
|
|
- c->timeout = TK2SEC(m->ticks) + 2;
|
|
|
-}
|
|
|
-
|
|
|
-// assume c is locked
|
|
|
-static int
|
|
|
-convretry(Conv *c, int reset)
|
|
|
-{
|
|
|
- c->retries++;
|
|
|
- if(c->retries > MaxRetries) {
|
|
|
- if(reset)
|
|
|
- convoconnect(c, ConReset, c->dialid, c->acceptid);
|
|
|
- convsetstate(c, CClosed);
|
|
|
- return 0;
|
|
|
- }
|
|
|
- c->timeout = TK2SEC(m->ticks) + (c->retries+1);
|
|
|
- return 1;
|
|
|
-}
|
|
|
-
|
|
|
-// assumes c is locked
|
|
|
-static void
|
|
|
-convtimer(Conv *c, ulong sec)
|
|
|
-{
|
|
|
- Block *b;
|
|
|
-
|
|
|
- if(c->timeout > sec)
|
|
|
- return;
|
|
|
-
|
|
|
- switch(c->state) {
|
|
|
- case CInit:
|
|
|
- break;
|
|
|
- case CDial:
|
|
|
- if(convretry(c, 1))
|
|
|
- convoconnect(c, ConOpenRequest, c->dialid, 0);
|
|
|
- break;
|
|
|
- case CAccept:
|
|
|
- if(convretry(c, 1))
|
|
|
- convoconnect(c, ConOpenAck, c->dialid, c->acceptid);
|
|
|
- break;
|
|
|
- case COpen:
|
|
|
- b = c->out.controlpkt;
|
|
|
- if(b != nil) {
|
|
|
- if(convretry(c, 1))
|
|
|
- convoput(c, TControl, ControlMesg, copyblock(b, blocklen(b)));
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- c->timeout = c->lastrecv + KeepAlive;
|
|
|
- if(c->timeout > sec)
|
|
|
- break;
|
|
|
- // keepalive - randomly spaced between KeepAlive and 2*KeepAlive
|
|
|
- if(c->timeout + KeepAlive > sec && nrand(c->lastrecv + 2*KeepAlive - sec) > 0)
|
|
|
- break;
|
|
|
- // can not use writecontrol
|
|
|
- b = allocb(4);
|
|
|
- c->out.controlseq++;
|
|
|
- hnputl(b->wp, c->out.controlseq);
|
|
|
- b->wp += 4;
|
|
|
- c->out.controlpkt = b;
|
|
|
- convretryinit(c);
|
|
|
- if(!waserror()) {
|
|
|
- convoput(c, TControl, ControlMesg, copyblock(b, blocklen(b)));
|
|
|
- poperror();
|
|
|
- }
|
|
|
- break;
|
|
|
- case CLocalClose:
|
|
|
- if(convretry(c, 0))
|
|
|
- convoconnect(c, ConClose, c->dialid, c->acceptid);
|
|
|
- break;
|
|
|
- case CRemoteClose:
|
|
|
- case CClosed:
|
|
|
- break;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static void
|
|
|
-sdpackproc(void *a)
|
|
|
-{
|
|
|
- Sdp *sdp = a;
|
|
|
- ulong sec;
|
|
|
- int i;
|
|
|
- Conv *c;
|
|
|
-
|
|
|
- for(;;) {
|
|
|
- tsleep(&up->sleep, return0, 0, 1000);
|
|
|
- sec = TK2SEC(m->ticks);
|
|
|
- qlock(sdp);
|
|
|
- for(i=0; i<sdp->nconv; i++) {
|
|
|
- c = sdp->conv[i];
|
|
|
- if(c->ref == 0)
|
|
|
- continue;
|
|
|
- qunlock(sdp);
|
|
|
- qlock(c);
|
|
|
- if(c->ref > 0 && !waserror()) {
|
|
|
- convtimer(c, sec);
|
|
|
- poperror();
|
|
|
- }
|
|
|
- qunlock(c);
|
|
|
- qlock(sdp);
|
|
|
- }
|
|
|
- qunlock(sdp);
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-Dev sdpdevtab = {
|
|
|
- 'E',
|
|
|
- "sdp",
|
|
|
-
|
|
|
- devreset,
|
|
|
- sdpinit,
|
|
|
- devshutdown,
|
|
|
- sdpattach,
|
|
|
- sdpwalk,
|
|
|
- sdpstat,
|
|
|
- sdpopen,
|
|
|
- devcreate,
|
|
|
- sdpclose,
|
|
|
- sdpread,
|
|
|
- devbread,
|
|
|
- sdpwrite,
|
|
|
- devbwrite,
|
|
|
- devremove,
|
|
|
- devwstat,
|
|
|
-};
|
|
|
-
|
|
|
-// assume hold lock on c
|
|
|
-static void
|
|
|
-convsetstate(Conv *c, int state)
|
|
|
-{
|
|
|
-
|
|
|
-if(0)print("convsetstate %d: %s -> %s\n", c->id, convstatename[c->state], convstatename[state]);
|
|
|
-
|
|
|
- switch(state) {
|
|
|
- default:
|
|
|
- panic("setstate: bad state: %d", state);
|
|
|
- case CDial:
|
|
|
- assert(c->state == CInit);
|
|
|
- c->dialid = (rand()<<16) + rand();
|
|
|
- convretryinit(c);
|
|
|
- convoconnect(c, ConOpenRequest, c->dialid, 0);
|
|
|
- break;
|
|
|
- case CAccept:
|
|
|
- assert(c->state == CInit);
|
|
|
- c->acceptid = (rand()<<16) + rand();
|
|
|
- convretryinit(c);
|
|
|
- convoconnect(c, ConOpenAck, c->dialid, c->acceptid);
|
|
|
- break;
|
|
|
- case COpen:
|
|
|
- assert(c->state == CDial || c->state == CAccept);
|
|
|
- c->lastrecv = TK2SEC(m->ticks);
|
|
|
- if(c->state == CDial) {
|
|
|
- convretryinit(c);
|
|
|
- convoconnect(c, ConOpenAckAck, c->dialid, c->acceptid);
|
|
|
- hnputl(c->in.secret, c->acceptid);
|
|
|
- hnputl(c->in.secret+4, c->dialid);
|
|
|
- hnputl(c->out.secret, c->dialid);
|
|
|
- hnputl(c->out.secret+4, c->acceptid);
|
|
|
- } else {
|
|
|
- hnputl(c->in.secret, c->dialid);
|
|
|
- hnputl(c->in.secret+4, c->acceptid);
|
|
|
- hnputl(c->out.secret, c->acceptid);
|
|
|
- hnputl(c->out.secret+4, c->dialid);
|
|
|
- }
|
|
|
- setalg(c, "hmac_md5_96", authalg, &c->auth);
|
|
|
- break;
|
|
|
- case CLocalClose:
|
|
|
- assert(c->state == CAccept || c->state == COpen);
|
|
|
- convretryinit(c);
|
|
|
- convoconnect(c, ConClose, c->dialid, c->acceptid);
|
|
|
- break;
|
|
|
- case CRemoteClose:
|
|
|
- wakeup(&c->in.controlready);
|
|
|
- wakeup(&c->out.controlready);
|
|
|
- break;
|
|
|
- case CClosed:
|
|
|
- wakeup(&c->in.controlready);
|
|
|
- wakeup(&c->out.controlready);
|
|
|
- if(c->readproc)
|
|
|
- postnote(c->readproc, 1, "interrupt", 0);
|
|
|
- if(c->state != CClosed)
|
|
|
- convderef(c);
|
|
|
- break;
|
|
|
- }
|
|
|
- c->state = state;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-//assumes c is locked
|
|
|
-static void
|
|
|
-convderef(Conv *c)
|
|
|
-{
|
|
|
- c->ref--;
|
|
|
- if(c->ref > 0) {
|
|
|
- return;
|
|
|
- }
|
|
|
- assert(c->ref == 0);
|
|
|
- assert(c->dataopen == 0);
|
|
|
- assert(c->controlopen == 0);
|
|
|
-if(0)print("convderef: %d: ref == 0!\n", c->id);
|
|
|
- c->state = CFree;
|
|
|
- if(c->chan) {
|
|
|
- cclose(c->chan);
|
|
|
- c->chan = nil;
|
|
|
- }
|
|
|
- if(c->channame) {
|
|
|
- free(c->channame);
|
|
|
- c->channame = nil;
|
|
|
- }
|
|
|
- c->cipher = nil;
|
|
|
- c->auth = nil;
|
|
|
- c->comp = nil;
|
|
|
- strcpy(c->owner, "network");
|
|
|
- c->perm = 0660;
|
|
|
- c->dialid = 0;
|
|
|
- c->acceptid = 0;
|
|
|
- c->timeout = 0;
|
|
|
- c->retries = 0;
|
|
|
- c->drop = 0;
|
|
|
- onewaycleanup(&c->in);
|
|
|
- onewaycleanup(&c->out);
|
|
|
- memset(&c->lstats, 0, sizeof(Stats));
|
|
|
- memset(&c->rstats, 0, sizeof(Stats));
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-onewaycleanup(OneWay *ow)
|
|
|
-{
|
|
|
- if(ow->controlpkt)
|
|
|
- freeb(ow->controlpkt);
|
|
|
- if(ow->authstate)
|
|
|
- free(ow->authstate);
|
|
|
- if(ow->cipherstate)
|
|
|
- free(ow->cipherstate);
|
|
|
- if(ow->compstate)
|
|
|
- free(ow->compstate);
|
|
|
- memset(ow, 0, sizeof(OneWay));
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-// assumes conv is locked
|
|
|
-static void
|
|
|
-convopenchan(Conv *c, char *path)
|
|
|
-{
|
|
|
- if(c->state != CInit || c->chan != nil)
|
|
|
- error("already connected");
|
|
|
- c->chan = namec(path, Aopen, ORDWR, 0);
|
|
|
- c->channame = smalloc(strlen(path)+1);
|
|
|
- strcpy(c->channame, path);
|
|
|
- if(waserror()) {
|
|
|
- cclose(c->chan);
|
|
|
- c->chan = nil;
|
|
|
- free(c->channame);
|
|
|
- c->channame = nil;
|
|
|
- nexterror();
|
|
|
- }
|
|
|
- kproc("convreader", convreader, c);
|
|
|
-
|
|
|
- assert(c->reader == 0 && c->ref > 0);
|
|
|
- // after kproc in case it fails
|
|
|
- c->reader = 1;
|
|
|
- c->ref++;
|
|
|
-
|
|
|
- poperror();
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-convstats(Conv *c, int local, char *buf, int n)
|
|
|
-{
|
|
|
- Stats *stats;
|
|
|
- char *p, *ep;
|
|
|
- int i;
|
|
|
-
|
|
|
- if(local) {
|
|
|
- stats = &c->lstats;
|
|
|
- } else {
|
|
|
- if(!waserror()) {
|
|
|
- writecontrol(c, 0, 0, 1);
|
|
|
- poperror();
|
|
|
- }
|
|
|
- stats = &c->rstats;
|
|
|
- }
|
|
|
-
|
|
|
- qlock(c);
|
|
|
- p = buf;
|
|
|
- ep = buf + n;
|
|
|
- p += snprint(p, ep-p, "outPackets: %lud\n", stats->outPackets);
|
|
|
- p += snprint(p, ep-p, "outDataPackets: %lud\n", stats->outDataPackets);
|
|
|
- p += snprint(p, ep-p, "outDataBytes: %lud\n", stats->outDataBytes);
|
|
|
- p += snprint(p, ep-p, "outCompDataBytes: %lud\n", stats->outCompDataBytes);
|
|
|
- for(i=0; i<NCompStats; i++) {
|
|
|
- if(stats->outCompStats[i] == 0)
|
|
|
- continue;
|
|
|
- p += snprint(p, ep-p, "outCompStats[%d]: %lud\n", i, stats->outCompStats[i]);
|
|
|
- }
|
|
|
- p += snprint(p, ep-p, "inPackets: %lud\n", stats->inPackets);
|
|
|
- p += snprint(p, ep-p, "inDataPackets: %lud\n", stats->inDataPackets);
|
|
|
- p += snprint(p, ep-p, "inDataBytes: %lud\n", stats->inDataBytes);
|
|
|
- p += snprint(p, ep-p, "inCompDataBytes: %lud\n", stats->inCompDataBytes);
|
|
|
- p += snprint(p, ep-p, "inMissing: %lud\n", stats->inMissing);
|
|
|
- p += snprint(p, ep-p, "inDup: %lud\n", stats->inDup);
|
|
|
- p += snprint(p, ep-p, "inReorder: %lud\n", stats->inReorder);
|
|
|
- p += snprint(p, ep-p, "inBadComp: %lud\n", stats->inBadComp);
|
|
|
- p += snprint(p, ep-p, "inBadAuth: %lud\n", stats->inBadAuth);
|
|
|
- p += snprint(p, ep-p, "inBadSeq: %lud\n", stats->inBadSeq);
|
|
|
- p += snprint(p, ep-p, "inBadOther: %lud\n", stats->inBadOther);
|
|
|
- USED(p);
|
|
|
- qunlock(c);
|
|
|
-}
|
|
|
-
|
|
|
-// c is locked
|
|
|
-static void
|
|
|
-convack(Conv *c)
|
|
|
-{
|
|
|
- Block *b;
|
|
|
- AckPkt *ack;
|
|
|
- Stats *s;
|
|
|
- int i;
|
|
|
-
|
|
|
- b = allocb(sizeof(AckPkt));
|
|
|
- ack = (AckPkt*)b->wp;
|
|
|
- b->wp += sizeof(AckPkt);
|
|
|
- s = &c->lstats;
|
|
|
- hnputl(ack->cseq, c->in.controlseq);
|
|
|
- hnputl(ack->outPackets, s->outPackets);
|
|
|
- hnputl(ack->outDataPackets, s->outDataPackets);
|
|
|
- hnputl(ack->outDataBytes, s->outDataBytes);
|
|
|
- hnputl(ack->outCompDataBytes, s->outCompDataBytes);
|
|
|
- for(i=0; i<NCompStats; i++)
|
|
|
- hnputl(ack->outCompStats+i*4, s->outCompStats[i]);
|
|
|
- hnputl(ack->inPackets, s->inPackets);
|
|
|
- hnputl(ack->inDataPackets, s->inDataPackets);
|
|
|
- hnputl(ack->inDataBytes, s->inDataBytes);
|
|
|
- hnputl(ack->inCompDataBytes, s->inCompDataBytes);
|
|
|
- hnputl(ack->inMissing, s->inMissing);
|
|
|
- hnputl(ack->inDup, s->inDup);
|
|
|
- hnputl(ack->inReorder, s->inReorder);
|
|
|
- hnputl(ack->inBadComp, s->inBadComp);
|
|
|
- hnputl(ack->inBadAuth, s->inBadAuth);
|
|
|
- hnputl(ack->inBadSeq, s->inBadSeq);
|
|
|
- hnputl(ack->inBadOther, s->inBadOther);
|
|
|
- convoput(c, TControl, ControlAck, b);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-// assume we hold lock for c
|
|
|
-static Block *
|
|
|
-conviput(Conv *c, Block *b, int control)
|
|
|
-{
|
|
|
- int type, subtype;
|
|
|
- ulong seq, seqwrap;
|
|
|
- long seqdiff;
|
|
|
- int pad;
|
|
|
-
|
|
|
- c->lstats.inPackets++;
|
|
|
-
|
|
|
- if(BLEN(b) < 4) {
|
|
|
- c->lstats.inBadOther++;
|
|
|
- freeb(b);
|
|
|
- return nil;
|
|
|
- }
|
|
|
-
|
|
|
- type = b->rp[0] >> 4;
|
|
|
- subtype = b->rp[0] & 0xf;
|
|
|
- b->rp += 1;
|
|
|
- if(type == TConnect) {
|
|
|
- conviconnect(c, subtype, b);
|
|
|
- return nil;
|
|
|
- }
|
|
|
-
|
|
|
- switch(c->state) {
|
|
|
- case CInit:
|
|
|
- case CDial:
|
|
|
- c->lstats.inBadOther++;
|
|
|
- convoconnect(c, ConReset, c->dialid, c->acceptid);
|
|
|
- convsetstate(c, CClosed);
|
|
|
- break;
|
|
|
- case CAccept:
|
|
|
- case CRemoteClose:
|
|
|
- case CLocalClose:
|
|
|
- c->lstats.inBadOther++;
|
|
|
- freeb(b);
|
|
|
- return nil;
|
|
|
- }
|
|
|
-
|
|
|
- seq = (b->rp[0]<<16) + (b->rp[1]<<8) + b->rp[2];
|
|
|
- b->rp += 3;
|
|
|
-
|
|
|
- seqwrap = c->in.seqwrap;
|
|
|
- seqdiff = seq - c->in.seq;
|
|
|
- if(seqdiff < -(SeqMax*3/4)) {
|
|
|
- seqwrap++;
|
|
|
- seqdiff += SeqMax;
|
|
|
- } else if(seqdiff > SeqMax*3/4) {
|
|
|
- seqwrap--;
|
|
|
- seqdiff -= SeqMax;
|
|
|
- }
|
|
|
-
|
|
|
- if(seqdiff <= 0) {
|
|
|
- if(seqdiff <= -SeqWindow) {
|
|
|
-if(0)print("old sequence number: %ld (%ld %ld)\n", seq, c->in.seqwrap, seqdiff);
|
|
|
- c->lstats.inBadSeq++;
|
|
|
- freeb(b);
|
|
|
- return nil;
|
|
|
- }
|
|
|
-
|
|
|
- if(c->in.window & (1<<-seqdiff)) {
|
|
|
-if(0)print("dup sequence number: %ld (%ld %ld)\n", seq, c->in.seqwrap, seqdiff);
|
|
|
- c->lstats.inDup++;
|
|
|
- freeb(b);
|
|
|
- return nil;
|
|
|
- }
|
|
|
-
|
|
|
- c->lstats.inReorder++;
|
|
|
- }
|
|
|
-
|
|
|
- // ok the sequence number looks ok
|
|
|
-if(0) print("coniput seq=%ulx\n", seq);
|
|
|
- if(c->in.auth != 0) {
|
|
|
- if(!(*c->in.auth)(&c->in, b->rp-4, BLEN(b)+4)) {
|
|
|
-if(0)print("bad auth %ld\n", BLEN(b)+4);
|
|
|
- c->lstats.inBadAuth++;
|
|
|
- freeb(b);
|
|
|
- return nil;
|
|
|
- }
|
|
|
- b->wp -= c->in.authlen;
|
|
|
- }
|
|
|
-
|
|
|
- if(c->in.cipher != 0) {
|
|
|
- if(!(*c->in.cipher)(&c->in, b->rp, BLEN(b))) {
|
|
|
-if(0)print("bad cipher\n");
|
|
|
- c->lstats.inBadOther++;
|
|
|
- freeb(b);
|
|
|
- return nil;
|
|
|
- }
|
|
|
- b->rp += c->in.cipherivlen;
|
|
|
- if(c->in.cipherblklen > 1) {
|
|
|
- pad = b->wp[-1];
|
|
|
- if(pad > BLEN(b)) {
|
|
|
-if(0)print("pad too big\n");
|
|
|
- c->lstats.inBadOther++;
|
|
|
- freeb(b);
|
|
|
- return nil;
|
|
|
- }
|
|
|
- b->wp -= pad;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- // ok the packet is good
|
|
|
- if(seqdiff > 0) {
|
|
|
- while(seqdiff > 0 && c->in.window != 0) {
|
|
|
- if((c->in.window & (1<<(SeqWindow-1))) == 0) {
|
|
|
- c->lstats.inMissing++;
|
|
|
- }
|
|
|
- c->in.window <<= 1;
|
|
|
- seqdiff--;
|
|
|
- }
|
|
|
- if(seqdiff > 0) {
|
|
|
- c->lstats.inMissing += seqdiff;
|
|
|
- seqdiff = 0;
|
|
|
- }
|
|
|
- c->in.seq = seq;
|
|
|
- c->in.seqwrap = seqwrap;
|
|
|
- }
|
|
|
- c->in.window |= 1<<-seqdiff;
|
|
|
- c->lastrecv = TK2SEC(m->ticks);
|
|
|
-
|
|
|
- switch(type) {
|
|
|
- case TControl:
|
|
|
- convicontrol(c, subtype, b);
|
|
|
- return nil;
|
|
|
- case TData:
|
|
|
- c->lstats.inDataPackets++;
|
|
|
- c->lstats.inDataBytes += BLEN(b);
|
|
|
- if(control)
|
|
|
- break;
|
|
|
- return b;
|
|
|
- case TCompData:
|
|
|
- c->lstats.inDataPackets++;
|
|
|
- c->lstats.inCompDataBytes += BLEN(b);
|
|
|
- b = convicomp(c, subtype, seq, b);
|
|
|
- if(b == nil) {
|
|
|
- c->lstats.inBadComp++;
|
|
|
- return nil;
|
|
|
- }
|
|
|
- c->lstats.inDataBytes += BLEN(b);
|
|
|
- if(control)
|
|
|
- break;
|
|
|
- return b;
|
|
|
- }
|
|
|
-if(0)print("dropping packet id=%d: type=%d n=%ld control=%d\n", c->id, type, BLEN(b), control);
|
|
|
- c->lstats.inBadOther++;
|
|
|
- freeb(b);
|
|
|
- return nil;
|
|
|
-}
|
|
|
-
|
|
|
-// assume hold conv lock
|
|
|
-static void
|
|
|
-conviconnect(Conv *c, int subtype, Block *b)
|
|
|
-{
|
|
|
- ulong dialid;
|
|
|
- ulong acceptid;
|
|
|
-
|
|
|
- if(BLEN(b) != 8) {
|
|
|
- freeb(b);
|
|
|
- return;
|
|
|
- }
|
|
|
- dialid = nhgetl(b->rp);
|
|
|
- acceptid = nhgetl(b->rp + 4);
|
|
|
- freeb(b);
|
|
|
-
|
|
|
-if(0)print("conviconnect: %s: %d %uld %uld\n", convstatename[c->state], subtype, dialid, acceptid);
|
|
|
-
|
|
|
- if(subtype == ConReset) {
|
|
|
- convsetstate(c, CClosed);
|
|
|
- return;
|
|
|
- }
|
|
|
-
|
|
|
- switch(c->state) {
|
|
|
- default:
|
|
|
- panic("unknown state: %d", c->state);
|
|
|
- case CInit:
|
|
|
- break;
|
|
|
- case CDial:
|
|
|
- if(dialid != c->dialid)
|
|
|
- goto Reset;
|
|
|
- break;
|
|
|
- case CAccept:
|
|
|
- case COpen:
|
|
|
- case CLocalClose:
|
|
|
- case CRemoteClose:
|
|
|
- if(dialid != c->dialid
|
|
|
- || subtype != ConOpenRequest && acceptid != c->acceptid)
|
|
|
- goto Reset;
|
|
|
- break;
|
|
|
- case CClosed:
|
|
|
- goto Reset;
|
|
|
- }
|
|
|
-
|
|
|
- switch(subtype) {
|
|
|
- case ConOpenRequest:
|
|
|
- switch(c->state) {
|
|
|
- case CInit:
|
|
|
- c->dialid = dialid;
|
|
|
- convsetstate(c, CAccept);
|
|
|
- return;
|
|
|
- case CAccept:
|
|
|
- case COpen:
|
|
|
- // duplicate ConOpenRequest that we ignore
|
|
|
- return;
|
|
|
- }
|
|
|
- break;
|
|
|
- case ConOpenAck:
|
|
|
- switch(c->state) {
|
|
|
- case CDial:
|
|
|
- c->acceptid = acceptid;
|
|
|
- convsetstate(c, COpen);
|
|
|
- return;
|
|
|
- case COpen:
|
|
|
- // duplicate that we have to ack
|
|
|
- convoconnect(c, ConOpenAckAck, acceptid, dialid);
|
|
|
- return;
|
|
|
- }
|
|
|
- break;
|
|
|
- case ConOpenAckAck:
|
|
|
- switch(c->state) {
|
|
|
- case CAccept:
|
|
|
- convsetstate(c, COpen);
|
|
|
- return;
|
|
|
- case COpen:
|
|
|
- case CLocalClose:
|
|
|
- case CRemoteClose:
|
|
|
- // duplicate that we ignore
|
|
|
- return;
|
|
|
- }
|
|
|
- break;
|
|
|
- case ConClose:
|
|
|
- switch(c->state) {
|
|
|
- case COpen:
|
|
|
- convoconnect(c, ConCloseAck, dialid, acceptid);
|
|
|
- convsetstate(c, CRemoteClose);
|
|
|
- return;
|
|
|
- case CRemoteClose:
|
|
|
- // duplicate ConClose
|
|
|
- convoconnect(c, ConCloseAck, dialid, acceptid);
|
|
|
- return;
|
|
|
- }
|
|
|
- break;
|
|
|
- case ConCloseAck:
|
|
|
- switch(c->state) {
|
|
|
- case CLocalClose:
|
|
|
- convsetstate(c, CClosed);
|
|
|
- return;
|
|
|
- }
|
|
|
- break;
|
|
|
- }
|
|
|
-Reset:
|
|
|
- // invalid connection message - reset to sender
|
|
|
-if(1)print("invalid conviconnect - sending reset\n");
|
|
|
- convoconnect(c, ConReset, dialid, acceptid);
|
|
|
- convsetstate(c, CClosed);
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-convicontrol(Conv *c, int subtype, Block *b)
|
|
|
-{
|
|
|
- ulong cseq;
|
|
|
- AckPkt *ack;
|
|
|
- int i;
|
|
|
-
|
|
|
- if(BLEN(b) < 4)
|
|
|
- return;
|
|
|
- cseq = nhgetl(b->rp);
|
|
|
-
|
|
|
- switch(subtype){
|
|
|
- case ControlMesg:
|
|
|
- if(cseq == c->in.controlseq) {
|
|
|
-if(0)print("duplicate control packet: %ulx\n", cseq);
|
|
|
- // duplicate control packet
|
|
|
- freeb(b);
|
|
|
- if(c->in.controlpkt == nil)
|
|
|
- convack(c);
|
|
|
- return;
|
|
|
- }
|
|
|
-
|
|
|
- if(cseq != c->in.controlseq+1)
|
|
|
- return;
|
|
|
- c->in.controlseq = cseq;
|
|
|
- b->rp += 4;
|
|
|
- if(BLEN(b) == 0) {
|
|
|
- // just a ping
|
|
|
- freeb(b);
|
|
|
- convack(c);
|
|
|
- } else {
|
|
|
- c->in.controlpkt = b;
|
|
|
-if(0) print("recv %ld size=%ld\n", cseq, BLEN(b));
|
|
|
- wakeup(&c->in.controlready);
|
|
|
- }
|
|
|
- return;
|
|
|
- case ControlAck:
|
|
|
- if(cseq != c->out.controlseq)
|
|
|
- return;
|
|
|
- if(BLEN(b) < sizeof(AckPkt))
|
|
|
- return;
|
|
|
- ack = (AckPkt*)(b->rp);
|
|
|
- c->rstats.outPackets = nhgetl(ack->outPackets);
|
|
|
- c->rstats.outDataPackets = nhgetl(ack->outDataPackets);
|
|
|
- c->rstats.outDataBytes = nhgetl(ack->outDataBytes);
|
|
|
- c->rstats.outCompDataBytes = nhgetl(ack->outCompDataBytes);
|
|
|
- for(i=0; i<NCompStats; i++)
|
|
|
- c->rstats.outCompStats[i] = nhgetl(ack->outCompStats + 4*i);
|
|
|
- c->rstats.inPackets = nhgetl(ack->inPackets);
|
|
|
- c->rstats.inDataPackets = nhgetl(ack->inDataPackets);
|
|
|
- c->rstats.inDataBytes = nhgetl(ack->inDataBytes);
|
|
|
- c->rstats.inCompDataBytes = nhgetl(ack->inCompDataBytes);
|
|
|
- c->rstats.inMissing = nhgetl(ack->inMissing);
|
|
|
- c->rstats.inDup = nhgetl(ack->inDup);
|
|
|
- c->rstats.inReorder = nhgetl(ack->inReorder);
|
|
|
- c->rstats.inBadComp = nhgetl(ack->inBadComp);
|
|
|
- c->rstats.inBadAuth = nhgetl(ack->inBadAuth);
|
|
|
- c->rstats.inBadSeq = nhgetl(ack->inBadSeq);
|
|
|
- c->rstats.inBadOther = nhgetl(ack->inBadOther);
|
|
|
- freeb(b);
|
|
|
- freeb(c->out.controlpkt);
|
|
|
- c->out.controlpkt = nil;
|
|
|
- c->timeout = c->lastrecv + KeepAlive;
|
|
|
- wakeup(&c->out.controlready);
|
|
|
- return;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static Block*
|
|
|
-convicomp(Conv *c, int subtype, ulong seq, Block *b)
|
|
|
-{
|
|
|
- if(c->in.comp == nil) {
|
|
|
- freeb(b);
|
|
|
- return nil;
|
|
|
- }
|
|
|
- if(!(*c->in.comp)(c, subtype, seq, &b))
|
|
|
- return nil;
|
|
|
- return b;
|
|
|
-}
|
|
|
-
|
|
|
-// c is locked
|
|
|
-static void
|
|
|
-convwriteblock(Conv *c, Block *b)
|
|
|
-{
|
|
|
- // simulated errors
|
|
|
- if(c->drop && nrand(c->drop) == 0)
|
|
|
- return;
|
|
|
-
|
|
|
- if(waserror()) {
|
|
|
- convsetstate(c, CClosed);
|
|
|
- nexterror();
|
|
|
- }
|
|
|
- devtab[c->chan->type]->bwrite(c->chan, b, 0);
|
|
|
- poperror();
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-// assume hold conv lock
|
|
|
-static void
|
|
|
-convoput(Conv *c, int type, int subtype, Block *b)
|
|
|
-{
|
|
|
- int pad;
|
|
|
-
|
|
|
- c->lstats.outPackets++;
|
|
|
- /* Make room for sdp trailer */
|
|
|
- if(c->out.cipherblklen > 1)
|
|
|
- pad = c->out.cipherblklen - (BLEN(b) + c->out.cipherivlen) % c->out.cipherblklen;
|
|
|
- else
|
|
|
- pad = 0;
|
|
|
-
|
|
|
- b = padblock(b, -(pad+c->out.authlen));
|
|
|
-
|
|
|
- if(pad) {
|
|
|
- memset(b->wp, 0, pad-1);
|
|
|
- b->wp[pad-1] = pad;
|
|
|
- b->wp += pad;
|
|
|
- }
|
|
|
-
|
|
|
- /* Make space to fit sdp header */
|
|
|
- b = padblock(b, 4 + c->out.cipherivlen);
|
|
|
- b->rp[0] = (type << 4) | subtype;
|
|
|
- c->out.seq++;
|
|
|
- if(c->out.seq == (1<<24)) {
|
|
|
- c->out.seq = 0;
|
|
|
- c->out.seqwrap++;
|
|
|
- }
|
|
|
- b->rp[1] = c->out.seq>>16;
|
|
|
- b->rp[2] = c->out.seq>>8;
|
|
|
- b->rp[3] = c->out.seq;
|
|
|
-
|
|
|
- if(c->out.cipher)
|
|
|
- (*c->out.cipher)(&c->out, b->rp+4, BLEN(b)-4);
|
|
|
-
|
|
|
- // auth
|
|
|
- if(c->out.auth) {
|
|
|
- b->wp += c->out.authlen;
|
|
|
- (*c->out.auth)(&c->out, b->rp, BLEN(b));
|
|
|
- }
|
|
|
-
|
|
|
- convwriteblock(c, b);
|
|
|
-}
|
|
|
-
|
|
|
-// assume hold conv lock
|
|
|
-static void
|
|
|
-convoconnect(Conv *c, int op, ulong dialid, ulong acceptid)
|
|
|
-{
|
|
|
- Block *b;
|
|
|
-
|
|
|
- c->lstats.outPackets++;
|
|
|
- assert(c->chan != nil);
|
|
|
- b = allocb(9);
|
|
|
- b->wp[0] = (TConnect << 4) | op;
|
|
|
- hnputl(b->wp+1, dialid);
|
|
|
- hnputl(b->wp+5, acceptid);
|
|
|
- b->wp += 9;
|
|
|
-
|
|
|
- if(!waserror()) {
|
|
|
- convwriteblock(c, b);
|
|
|
- poperror();
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static Block *
|
|
|
-convreadblock(Conv *c, int n)
|
|
|
-{
|
|
|
- Block *b;
|
|
|
- Chan *ch;
|
|
|
-
|
|
|
- qlock(&c->readlk);
|
|
|
- if(waserror()) {
|
|
|
- c->readproc = nil;
|
|
|
- qunlock(&c->readlk);
|
|
|
- nexterror();
|
|
|
- }
|
|
|
- qlock(c);
|
|
|
- if(c->state == CClosed) {
|
|
|
- qunlock(c);
|
|
|
- error("closed");
|
|
|
- }
|
|
|
- c->readproc = up;
|
|
|
- ch = c->chan;
|
|
|
- assert(c->ref > 0);
|
|
|
- qunlock(c);
|
|
|
-
|
|
|
- b = devtab[ch->type]->bread(ch, n, 0);
|
|
|
- c->readproc = nil;
|
|
|
- poperror();
|
|
|
- qunlock(&c->readlk);
|
|
|
-
|
|
|
- return b;
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-readready(void *a)
|
|
|
-{
|
|
|
- Conv *c = a;
|
|
|
-
|
|
|
- return c->in.controlpkt != nil || (c->state == CClosed) || (c->state == CRemoteClose);
|
|
|
-}
|
|
|
-
|
|
|
-static Block *
|
|
|
-readcontrol(Conv *c, int n)
|
|
|
-{
|
|
|
- Block *b;
|
|
|
-
|
|
|
- USED(n);
|
|
|
-
|
|
|
- qlock(&c->in.controllk);
|
|
|
- if(waserror()) {
|
|
|
- qunlock(&c->in.controllk);
|
|
|
- nexterror();
|
|
|
- }
|
|
|
- qlock(c); // this lock is not held during the sleep below
|
|
|
-
|
|
|
- for(;;) {
|
|
|
- if(c->chan == nil || c->state == CClosed) {
|
|
|
- qunlock(c);
|
|
|
-if(0)print("readcontrol: return error - state = %s\n", convstatename[c->state]);
|
|
|
- error("conversation closed");
|
|
|
- }
|
|
|
-
|
|
|
- if(c->in.controlpkt != nil)
|
|
|
- break;
|
|
|
-
|
|
|
- if(c->state == CRemoteClose) {
|
|
|
- qunlock(c);
|
|
|
-if(0)print("readcontrol: return nil - state = %s\n", convstatename[c->state]);
|
|
|
- poperror();
|
|
|
- return nil;
|
|
|
- }
|
|
|
- qunlock(c);
|
|
|
- sleep(&c->in.controlready, readready, c);
|
|
|
- qlock(c);
|
|
|
- }
|
|
|
-
|
|
|
- convack(c);
|
|
|
-
|
|
|
- b = c->in.controlpkt;
|
|
|
- c->in.controlpkt = nil;
|
|
|
- qunlock(c);
|
|
|
- poperror();
|
|
|
- qunlock(&c->in.controllk);
|
|
|
- return b;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int
|
|
|
-writeready(void *a)
|
|
|
-{
|
|
|
- Conv *c = a;
|
|
|
-
|
|
|
- return c->out.controlpkt == nil || (c->state == CClosed) || (c->state == CRemoteClose);
|
|
|
-}
|
|
|
-
|
|
|
-// c is locked
|
|
|
-static void
|
|
|
-writewait(Conv *c)
|
|
|
-{
|
|
|
- for(;;) {
|
|
|
- if(c->state == CFree || c->state == CInit ||
|
|
|
- c->state == CClosed || c->state == CRemoteClose)
|
|
|
- error("conversation closed");
|
|
|
-
|
|
|
- if(c->state == COpen && c->out.controlpkt == nil)
|
|
|
- break;
|
|
|
-
|
|
|
- qunlock(c);
|
|
|
- if(waserror()) {
|
|
|
- qlock(c);
|
|
|
- nexterror();
|
|
|
- }
|
|
|
- sleep(&c->out.controlready, writeready, c);
|
|
|
- poperror();
|
|
|
- qlock(c);
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-writecontrol(Conv *c, void *p, int n, int wait)
|
|
|
-{
|
|
|
- Block *b;
|
|
|
-
|
|
|
- qlock(&c->out.controllk);
|
|
|
- qlock(c);
|
|
|
- if(waserror()) {
|
|
|
- qunlock(c);
|
|
|
- qunlock(&c->out.controllk);
|
|
|
- nexterror();
|
|
|
- }
|
|
|
- writewait(c);
|
|
|
- b = allocb(4+n);
|
|
|
- c->out.controlseq++;
|
|
|
- hnputl(b->wp, c->out.controlseq);
|
|
|
- memmove(b->wp+4, p, n);
|
|
|
- b->wp += 4+n;
|
|
|
- c->out.controlpkt = b;
|
|
|
- convretryinit(c);
|
|
|
- convoput(c, TControl, ControlMesg, copyblock(b, blocklen(b)));
|
|
|
- if(wait)
|
|
|
- writewait(c);
|
|
|
- poperror();
|
|
|
- qunlock(c);
|
|
|
- qunlock(&c->out.controllk);
|
|
|
-}
|
|
|
-
|
|
|
-static Block *
|
|
|
-readdata(Conv *c, int n)
|
|
|
-{
|
|
|
- Block *b;
|
|
|
- int nn;
|
|
|
-
|
|
|
- for(;;) {
|
|
|
-
|
|
|
- // some slack for tunneling overhead
|
|
|
- nn = n + 100;
|
|
|
-
|
|
|
- // make sure size is big enough for control messages
|
|
|
- if(nn < 1000)
|
|
|
- nn = 1000;
|
|
|
- b = convreadblock(c, nn);
|
|
|
- if(b == nil)
|
|
|
- return nil;
|
|
|
- qlock(c);
|
|
|
- if(waserror()) {
|
|
|
- qunlock(c);
|
|
|
- return nil;
|
|
|
- }
|
|
|
- b = conviput(c, b, 0);
|
|
|
- poperror();
|
|
|
- qunlock(c);
|
|
|
- if(b != nil) {
|
|
|
- if(BLEN(b) > n)
|
|
|
- b->wp = b->rp + n;
|
|
|
- return b;
|
|
|
- }
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static long
|
|
|
-writedata(Conv *c, Block *b)
|
|
|
-{
|
|
|
- int n;
|
|
|
- ulong seq;
|
|
|
- int subtype;
|
|
|
-
|
|
|
- qlock(c);
|
|
|
- if(waserror()) {
|
|
|
- qunlock(c);
|
|
|
- nexterror();
|
|
|
- }
|
|
|
-
|
|
|
- if(c->state != COpen) {
|
|
|
- freeb(b);
|
|
|
- error("conversation not open");
|
|
|
- }
|
|
|
-
|
|
|
- n = BLEN(b);
|
|
|
- c->lstats.outDataPackets++;
|
|
|
- c->lstats.outDataBytes += n;
|
|
|
-
|
|
|
- if(c->out.comp != nil) {
|
|
|
- // must generate same value as convoput
|
|
|
- seq = (c->out.seq + 1) & (SeqMax-1);
|
|
|
-
|
|
|
- subtype = (*c->out.comp)(c, 0, seq, &b);
|
|
|
- c->lstats.outCompDataBytes += BLEN(b);
|
|
|
- convoput(c, TCompData, subtype, b);
|
|
|
- } else
|
|
|
- convoput(c, TData, 0, b);
|
|
|
-
|
|
|
- poperror();
|
|
|
- qunlock(c);
|
|
|
- return n;
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-convreader(void *a)
|
|
|
-{
|
|
|
- Conv *c = a;
|
|
|
- Block *b;
|
|
|
-
|
|
|
- qlock(c);
|
|
|
- assert(c->reader == 1);
|
|
|
- while(c->dataopen == 0 && c->state != CClosed) {
|
|
|
- qunlock(c);
|
|
|
- b = nil;
|
|
|
- if(!waserror()) {
|
|
|
- b = convreadblock(c, 2000);
|
|
|
- poperror();
|
|
|
- }
|
|
|
- qlock(c);
|
|
|
- if(b == nil) {
|
|
|
- if(strcmp(up->errstr, Eintr) != 0) {
|
|
|
- convsetstate(c, CClosed);
|
|
|
- break;
|
|
|
- }
|
|
|
- } else if(!waserror()) {
|
|
|
- conviput(c, b, 1);
|
|
|
- poperror();
|
|
|
- }
|
|
|
- }
|
|
|
- c->reader = 0;
|
|
|
- convderef(c);
|
|
|
- qunlock(c);
|
|
|
- pexit("hangup", 1);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/* ciphers, authenticators, and compressors */
|
|
|
-
|
|
|
-static void
|
|
|
-setalg(Conv *c, char *name, Algorithm *alg, Algorithm **p)
|
|
|
-{
|
|
|
- for(; alg->name; alg++)
|
|
|
- if(strcmp(name, alg->name) == 0)
|
|
|
- break;
|
|
|
- if(alg->name == nil)
|
|
|
- error("unknown algorithm");
|
|
|
-
|
|
|
- *p = alg;
|
|
|
- alg->init(c);
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-setsecret(OneWay *ow, char *secret)
|
|
|
-{
|
|
|
- char *p;
|
|
|
- int i, c;
|
|
|
-
|
|
|
- i = 0;
|
|
|
- memset(ow->secret, 0, sizeof(ow->secret));
|
|
|
- for(p=secret; *p; p++) {
|
|
|
- if(i >= sizeof(ow->secret)*2)
|
|
|
- break;
|
|
|
- c = *p;
|
|
|
- if(c >= '0' && c <= '9')
|
|
|
- c -= '0';
|
|
|
- else if(c >= 'a' && c <= 'f')
|
|
|
- c -= 'a'-10;
|
|
|
- else if(c >= 'A' && c <= 'F')
|
|
|
- c -= 'A'-10;
|
|
|
- else
|
|
|
- error("bad character in secret");
|
|
|
- if((i&1) == 0)
|
|
|
- c <<= 4;
|
|
|
- ow->secret[i>>1] |= c;
|
|
|
- i++;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-setkey(uchar *key, int n, OneWay *ow, char *prefix)
|
|
|
-{
|
|
|
- uchar ibuf[SHA1dlen], obuf[MD5dlen], salt[10];
|
|
|
- int i, round = 0;
|
|
|
-
|
|
|
- while(n > 0){
|
|
|
- for(i=0; i<round+1; i++)
|
|
|
- salt[i] = 'A'+round;
|
|
|
- sha1((uchar*)prefix, strlen(prefix), ibuf, sha1(salt, round+1, nil, nil));
|
|
|
- md5(ibuf, SHA1dlen, obuf, md5(ow->secret, sizeof(ow->secret), nil, nil));
|
|
|
- i = (n<MD5dlen) ? n : MD5dlen;
|
|
|
- memmove(key, obuf, i);
|
|
|
- key += i;
|
|
|
- n -= i;
|
|
|
- if(++round > sizeof salt)
|
|
|
- panic("setkey: you ask too much");
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-cipherfree(Conv *c)
|
|
|
-{
|
|
|
- if(c->in.cipherstate) {
|
|
|
- free(c->in.cipherstate);
|
|
|
- c->in.cipherstate = nil;
|
|
|
- }
|
|
|
- if(c->out.cipherstate) {
|
|
|
- free(c->out.cipherstate);
|
|
|
- c->out.cipherstate = nil;
|
|
|
- }
|
|
|
- c->in.cipher = nil;
|
|
|
- c->in.cipherblklen = 0;
|
|
|
- c->out.cipherblklen = 0;
|
|
|
- c->in.cipherivlen = 0;
|
|
|
- c->out.cipherivlen = 0;
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-authfree(Conv *c)
|
|
|
-{
|
|
|
- if(c->in.authstate) {
|
|
|
- free(c->in.authstate);
|
|
|
- c->in.authstate = nil;
|
|
|
- }
|
|
|
- if(c->out.authstate) {
|
|
|
- free(c->out.authstate);
|
|
|
- c->out.authstate = nil;
|
|
|
- }
|
|
|
- c->in.auth = nil;
|
|
|
- c->in.authlen = 0;
|
|
|
- c->out.authlen = 0;
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-compfree(Conv *c)
|
|
|
-{
|
|
|
- if(c->in.compstate) {
|
|
|
- free(c->in.compstate);
|
|
|
- c->in.compstate = nil;
|
|
|
- }
|
|
|
- if(c->out.compstate) {
|
|
|
- free(c->out.compstate);
|
|
|
- c->out.compstate = nil;
|
|
|
- }
|
|
|
- c->in.comp = nil;
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-nullcipherinit(Conv *c)
|
|
|
-{
|
|
|
- cipherfree(c);
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-desencrypt(OneWay *ow, uchar *p, int n)
|
|
|
-{
|
|
|
- uchar *pp, *ip, *eip, *ep;
|
|
|
- DESstate *ds = ow->cipherstate;
|
|
|
-
|
|
|
- if(n < 8 || (n & 0x7 != 0))
|
|
|
- return 0;
|
|
|
- ep = p + n;
|
|
|
- memmove(p, ds->ivec, 8);
|
|
|
- for(p += 8; p < ep; p += 8){
|
|
|
- pp = p;
|
|
|
- ip = ds->ivec;
|
|
|
- for(eip = ip+8; ip < eip; )
|
|
|
- *pp++ ^= *ip++;
|
|
|
- block_cipher(ds->expanded, p, 0);
|
|
|
- memmove(ds->ivec, p, 8);
|
|
|
- }
|
|
|
- return 1;
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-desdecrypt(OneWay *ow, uchar *p, int n)
|
|
|
-{
|
|
|
- uchar tmp[8];
|
|
|
- uchar *tp, *ip, *eip, *ep;
|
|
|
- DESstate *ds = ow->cipherstate;
|
|
|
-
|
|
|
- if(n < 8 || (n & 0x7 != 0))
|
|
|
- return 0;
|
|
|
- ep = p + n;
|
|
|
- memmove(ds->ivec, p, 8);
|
|
|
- p += 8;
|
|
|
- while(p < ep){
|
|
|
- memmove(tmp, p, 8);
|
|
|
- block_cipher(ds->expanded, p, 1);
|
|
|
- tp = tmp;
|
|
|
- ip = ds->ivec;
|
|
|
- for(eip = ip+8; ip < eip; ){
|
|
|
- *p++ ^= *ip;
|
|
|
- *ip++ = *tp++;
|
|
|
- }
|
|
|
- }
|
|
|
- return 1;
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-descipherinit(Conv *c)
|
|
|
-{
|
|
|
- uchar key[8];
|
|
|
- uchar ivec[8];
|
|
|
- int i;
|
|
|
- int n = c->cipher->keylen;
|
|
|
-
|
|
|
- cipherfree(c);
|
|
|
-
|
|
|
- if(n > sizeof(key))
|
|
|
- n = sizeof(key);
|
|
|
-
|
|
|
- /* in */
|
|
|
- memset(key, 0, sizeof(key));
|
|
|
- setkey(key, n, &c->in, "cipher");
|
|
|
- memset(ivec, 0, sizeof(ivec));
|
|
|
- c->in.cipherblklen = 8;
|
|
|
- c->in.cipherivlen = 8;
|
|
|
- c->in.cipher = desdecrypt;
|
|
|
- c->in.cipherstate = smalloc(sizeof(DESstate));
|
|
|
- setupDESstate(c->in.cipherstate, key, ivec);
|
|
|
-
|
|
|
- /* out */
|
|
|
- memset(key, 0, sizeof(key));
|
|
|
- setkey(key, n, &c->out, "cipher");
|
|
|
- for(i=0; i<8; i++)
|
|
|
- ivec[i] = nrand(256);
|
|
|
- c->out.cipherblklen = 8;
|
|
|
- c->out.cipherivlen = 8;
|
|
|
- c->out.cipher = desencrypt;
|
|
|
- c->out.cipherstate = smalloc(sizeof(DESstate));
|
|
|
- setupDESstate(c->out.cipherstate, key, ivec);
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-rc4encrypt(OneWay *ow, uchar *p, int n)
|
|
|
-{
|
|
|
- CipherRc4 *cr = ow->cipherstate;
|
|
|
-
|
|
|
- if(n < 4)
|
|
|
- return 0;
|
|
|
-
|
|
|
- hnputl(p, cr->cseq);
|
|
|
- p += 4;
|
|
|
- n -= 4;
|
|
|
- rc4(&cr->current, p, n);
|
|
|
- cr->cseq += n;
|
|
|
- return 1;
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-rc4decrypt(OneWay *ow, uchar *p, int n)
|
|
|
-{
|
|
|
- CipherRc4 *cr = ow->cipherstate;
|
|
|
- RC4state tmpstate;
|
|
|
- ulong seq;
|
|
|
- long d, dd;
|
|
|
-
|
|
|
- if(n < 4)
|
|
|
- return 0;
|
|
|
-
|
|
|
- seq = nhgetl(p);
|
|
|
- p += 4;
|
|
|
- n -= 4;
|
|
|
- d = seq-cr->cseq;
|
|
|
- if(d == 0) {
|
|
|
- rc4(&cr->current, p, n);
|
|
|
- cr->cseq += n;
|
|
|
- if(cr->ovalid) {
|
|
|
- dd = cr->cseq - cr->lgseq;
|
|
|
- if(dd > RC4back)
|
|
|
- cr->ovalid = 0;
|
|
|
- }
|
|
|
- } else if(d > 0) {
|
|
|
-//print("missing packet: %uld %ld\n", seq, d);
|
|
|
- // this link is hosed
|
|
|
- if(d > RC4forward)
|
|
|
- return 0;
|
|
|
- cr->lgseq = seq;
|
|
|
- if(!cr->ovalid) {
|
|
|
- cr->ovalid = 1;
|
|
|
- cr->oseq = cr->cseq;
|
|
|
- memmove(&cr->old, &cr->current, sizeof(RC4state));
|
|
|
- }
|
|
|
- rc4skip(&cr->current, d);
|
|
|
- rc4(&cr->current, p, n);
|
|
|
- cr->cseq = seq+n;
|
|
|
- } else {
|
|
|
-//print("reordered packet: %uld %ld\n", seq, d);
|
|
|
- dd = seq - cr->oseq;
|
|
|
- if(!cr->ovalid || -d > RC4back || dd < 0)
|
|
|
- return 0;
|
|
|
- memmove(&tmpstate, &cr->old, sizeof(RC4state));
|
|
|
- rc4skip(&tmpstate, dd);
|
|
|
- rc4(&tmpstate, p, n);
|
|
|
- return 1;
|
|
|
- }
|
|
|
-
|
|
|
- // move old state up
|
|
|
- if(cr->ovalid) {
|
|
|
- dd = cr->cseq - RC4back - cr->oseq;
|
|
|
- if(dd > 0) {
|
|
|
- rc4skip(&cr->old, dd);
|
|
|
- cr->oseq += dd;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- return 1;
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-rc4cipherinit(Conv *c)
|
|
|
-{
|
|
|
- uchar key[32];
|
|
|
- CipherRc4 *cr;
|
|
|
- int n;
|
|
|
-
|
|
|
- cipherfree(c);
|
|
|
-
|
|
|
- n = c->cipher->keylen;
|
|
|
- if(n > sizeof(key))
|
|
|
- n = sizeof(key);
|
|
|
-
|
|
|
- /* in */
|
|
|
- memset(key, 0, sizeof(key));
|
|
|
- setkey(key, n, &c->in, "cipher");
|
|
|
- c->in.cipherblklen = 1;
|
|
|
- c->in.cipherivlen = 4;
|
|
|
- c->in.cipher = rc4decrypt;
|
|
|
- cr = smalloc(sizeof(CipherRc4));
|
|
|
- memset(cr, 0, sizeof(*cr));
|
|
|
- setupRC4state(&cr->current, key, n);
|
|
|
- c->in.cipherstate = cr;
|
|
|
-
|
|
|
- /* out */
|
|
|
- memset(key, 0, sizeof(key));
|
|
|
- setkey(key, n, &c->out, "cipher");
|
|
|
- c->out.cipherblklen = 1;
|
|
|
- c->out.cipherivlen = 4;
|
|
|
- c->out.cipher = rc4encrypt;
|
|
|
- cr = smalloc(sizeof(CipherRc4));
|
|
|
- memset(cr, 0, sizeof(*cr));
|
|
|
- setupRC4state(&cr->current, key, n);
|
|
|
- c->out.cipherstate = cr;
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-nullauthinit(Conv *c)
|
|
|
-{
|
|
|
- authfree(c);
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-shaauthinit(Conv *c)
|
|
|
-{
|
|
|
- authfree(c);
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-seanq_hmac_md5(uchar hash[MD5dlen], ulong wrap, uchar *t, long tlen, uchar *key, long klen)
|
|
|
-{
|
|
|
- uchar ipad[65], opad[65], wbuf[4];
|
|
|
- int i;
|
|
|
- DigestState *digest;
|
|
|
- uchar innerhash[MD5dlen];
|
|
|
-
|
|
|
- for(i=0; i<64; i++){
|
|
|
- ipad[i] = 0x36;
|
|
|
- opad[i] = 0x5c;
|
|
|
- }
|
|
|
- ipad[64] = opad[64] = 0;
|
|
|
- for(i=0; i<klen; i++){
|
|
|
- ipad[i] ^= key[i];
|
|
|
- opad[i] ^= key[i];
|
|
|
- }
|
|
|
- hnputl(wbuf, wrap);
|
|
|
- digest = md5(ipad, 64, nil, nil);
|
|
|
- digest = md5(wbuf, sizeof(wbuf), nil, digest);
|
|
|
- md5(t, tlen, innerhash, digest);
|
|
|
- digest = md5(opad, 64, nil, nil);
|
|
|
- md5(innerhash, MD5dlen, hash, digest);
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-md5auth(OneWay *ow, uchar *t, int tlen)
|
|
|
-{
|
|
|
- uchar hash[MD5dlen];
|
|
|
- int r;
|
|
|
-
|
|
|
- if(tlen < ow->authlen)
|
|
|
- return 0;
|
|
|
- tlen -= ow->authlen;
|
|
|
-
|
|
|
- memset(hash, 0, MD5dlen);
|
|
|
- seanq_hmac_md5(hash, ow->seqwrap, t, tlen, (uchar*)ow->authstate, 16);
|
|
|
- r = memcmp(t+tlen, hash, ow->authlen) == 0;
|
|
|
- memmove(t+tlen, hash, ow->authlen);
|
|
|
- return r;
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-md5authinit(Conv *c)
|
|
|
-{
|
|
|
- int keylen;
|
|
|
-
|
|
|
- authfree(c);
|
|
|
-
|
|
|
- keylen = c->auth->keylen;
|
|
|
- if(keylen > 16)
|
|
|
- keylen = 16;
|
|
|
-
|
|
|
- /* in */
|
|
|
- c->in.authstate = smalloc(16);
|
|
|
- memset(c->in.authstate, 0, 16);
|
|
|
- setkey(c->in.authstate, keylen, &c->in, "auth");
|
|
|
- c->in.authlen = 12;
|
|
|
- c->in.auth = md5auth;
|
|
|
-
|
|
|
- /* out */
|
|
|
- c->out.authstate = smalloc(16);
|
|
|
- memset(c->out.authstate, 0, 16);
|
|
|
- setkey(c->out.authstate, keylen, &c->out, "auth");
|
|
|
- c->out.authlen = 12;
|
|
|
- c->out.auth = md5auth;
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-nullcompinit(Conv *c)
|
|
|
-{
|
|
|
- compfree(c);
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-thwackcomp(Conv *c, int, ulong seq, Block **bp)
|
|
|
-{
|
|
|
- Block *b, *bb;
|
|
|
- int nn;
|
|
|
- ulong ackseq;
|
|
|
- uchar mask;
|
|
|
-
|
|
|
- // add ack info
|
|
|
- b = padblock(*bp, 4);
|
|
|
-
|
|
|
- ackseq = unthwackstate(c->in.compstate, &mask);
|
|
|
- b->rp[0] = mask;
|
|
|
- b->rp[1] = ackseq>>16;
|
|
|
- b->rp[2] = ackseq>>8;
|
|
|
- b->rp[3] = ackseq;
|
|
|
-
|
|
|
- bb = allocb(BLEN(b));
|
|
|
- nn = thwack(c->out.compstate, bb->wp, b->rp, BLEN(b), seq, c->lstats.outCompStats);
|
|
|
- if(nn < 0) {
|
|
|
- freeb(bb);
|
|
|
- *bp = b;
|
|
|
- return ThwackU;
|
|
|
- } else {
|
|
|
- bb->wp += nn;
|
|
|
- freeb(b);
|
|
|
- *bp = bb;
|
|
|
- return ThwackC;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-thwackuncomp(Conv *c, int subtype, ulong seq, Block **bp)
|
|
|
-{
|
|
|
- Block *b, *bb;
|
|
|
- ulong mask;
|
|
|
- ulong mseq;
|
|
|
- int n;
|
|
|
-
|
|
|
- switch(subtype) {
|
|
|
- default:
|
|
|
- return 0;
|
|
|
- case ThwackU:
|
|
|
- b = *bp;
|
|
|
- mask = b->rp[0];
|
|
|
- mseq = (b->rp[1]<<16) | (b->rp[2]<<8) | b->rp[3];
|
|
|
- b->rp += 4;
|
|
|
- thwackack(c->out.compstate, mseq, mask);
|
|
|
- return 1;
|
|
|
- case ThwackC:
|
|
|
- bb = *bp;
|
|
|
- b = allocb(ThwMaxBlock);
|
|
|
- n = unthwack(c->in.compstate, b->wp, ThwMaxBlock, bb->rp, BLEN(bb), seq);
|
|
|
- freeb(bb);
|
|
|
- if(n < 0) {
|
|
|
-if(0)print("unthwack failed: %d\n", n);
|
|
|
- freeb(b);
|
|
|
- return 0;
|
|
|
- }
|
|
|
- b->wp += n;
|
|
|
- mask = b->rp[0];
|
|
|
- mseq = (b->rp[1]<<16) | (b->rp[2]<<8) | b->rp[3];
|
|
|
- thwackack(c->out.compstate, mseq, mask);
|
|
|
- b->rp += 4;
|
|
|
- *bp = b;
|
|
|
- return 1;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-thwackcompinit(Conv *c)
|
|
|
-{
|
|
|
- compfree(c);
|
|
|
-
|
|
|
- c->in.compstate = malloc(sizeof(Unthwack));
|
|
|
- if(c->in.compstate == nil)
|
|
|
- error(Enomem);
|
|
|
- unthwackinit(c->in.compstate);
|
|
|
- c->out.compstate = malloc(sizeof(Thwack));
|
|
|
- if(c->out.compstate == nil)
|
|
|
- error(Enomem);
|
|
|
- thwackinit(c->out.compstate);
|
|
|
- c->in.comp = thwackuncomp;
|
|
|
- c->out.comp = thwackcomp;
|
|
|
-}
|