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ckcpro.w
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char *protv = /* -*-C-*- */
"C-Kermit Protocol Module 10.0.166, 23 Sep 2022";
int kactive = 0; /* Kermit protocol is active */
#define PKTZEROHACK
/* C K C P R O -- C-Kermit Protocol Module, in Wart preprocessor notation. */
/*
Author: Frank da Cruz <[email protected]>,
Columbia University Academic Information Systems, New York City.
Copyright (C) 1985, 2022
Trustees of Columbia University in the City of New York.
All rights reserved. See the C-Kermit COPYING.TXT file or the
copyright text in the ckcmai.c module for disclaimer and permissions.
*/
#ifndef NOXFER
#include "ckcsym.h"
#include "ckcdeb.h"
#include "ckcasc.h"
#include "ckcker.h"
#ifdef OS2
#ifndef NT
#define INCL_NOPM
#define INCL_VIO /* Needed for ckocon.h */
#include <os2.h>
#undef COMMENT
#endif /* NT */
#include "ckocon.h"
#endif /* OS2 */
#ifdef CK_AUTHENTICATION
#include "ckuath.h" /* fdc 2021-12-17 */
#endif /* CK_AUTHENTICATION */
/*
Note -- This file may also be preprocessed by the UNIX Lex program, but
you must indent the above #include statements before using Lex, and then
restore them to the left margin in the resulting C program before compilation.
Also, the invocation of the "wart()" function below must be replaced by an
invocation of the "yylex()" function. It might also be necessary to remove
comments in the (%)(%)...(%)(%) section.
*/
/* State definitions for Wart (or Lex) */
%states ipkt rfile rattr rdpkt ssinit ssfile ssattr ssdata sseof sseot
%states serve generic get rgen ssopkt ropkt
_PROTOTYP(static VOID xxproto,(void));
_PROTOTYP(static VOID wheremsg,(void));
_PROTOTYP(int wart,(void));
_PROTOTYP(static int sgetinit,(int,int));
_PROTOTYP(int sndspace,(int));
/* External C-Kermit variable declarations */
extern char *versio, *srvtxt, *cmarg, *cmarg2, **cmlist, *rf_err;
extern char * rfspec, * sfspec, * srfspec, * rrfspec;
extern char * prfspec, * psfspec, * psrfspec, * prrfspec;
extern char *cdmsgfile[];
extern char * snd_move, * snd_rename, * srimsg;
extern char filnam[], ofilnam[], fspec[], ttname[], ofn1[];
extern CHAR sstate, *srvptr, *data;
extern int timint, rtimo, nfils, hcflg, xflg, flow, mdmtyp, network;
extern int oopts, omode, oname, opath, nopush, isguest, xcmdsrc, rcdactive;
extern int rejection, moving, fncact, bye_active, urserver, fatalio;
extern int protocol, prefixing, carrier, fnspath, interrupted;
extern long filcnt;
extern int recursive, inserver, nzxopts, idletmo, srvidl, xfrint;
extern struct ck_p ptab[];
extern int remfile, rempipe, xferstat, filestatus, wearealike, fackpath;
extern int patterns, filepeek, gnferror;
extern char * remdest;
#ifdef PKTZEROHACK
#define PKTZEROLEN 32
static char ipktack[PKTZEROLEN];
static int ipktlen = 0;
#endif /* PKTZEROHACK */
static int s_timint = -1; /* For saving timeout value */
static int myjob = 0;
static int havefs = 0;
#ifdef CK_LOGIN
static int logtries = 0;
#endif /* CK_LOGIN */
static int cancel = 0;
int fackbug = 0;
#ifdef STREAMING
extern int streaming, streamok;
static VOID
streamon() {
if (streamok) {
debug(F100,"streamon","",0);
streaming = 1;
timint = 0; /* No timeouts while streaming. */
}
}
#ifdef COMMENT /* (not used) */
static VOID
streamoff() {
if (streaming) {
debug(F100,"streamoff","",0);
streaming = 0;
timint = s_timint; /* Restore timeout */
}
}
#endif /* COMMENT */
#else /* STREAMING */
#define streamon()
#define streamoff()
#endif /* STREAMING */
#ifndef NOSPL
_PROTOTYP( int addmac, (char *, char *) );
_PROTOTYP( int zzstring, (char *, char **, int *) );
#endif /* NOSPL */
#ifndef NOICP
_PROTOTYP( int cmdsrc, (void) );
#endif /* NOICP */
#ifndef NOSERVER
extern char * x_user, * x_passwd, * x_acct;
extern int x_login, x_logged;
#endif /* NOSERVER */
#include "ckcnet.h"
#ifdef TNCODE
extern int ttnproto; /* Network protocol */
#endif /* TNCODE */
#ifdef CK_SPEED
extern short ctlp[]; /* Control-character prefix table */
#endif /* CK_SPEED */
#ifdef TNCODE
extern int tn_b_nlm, tn_b_xfer, tn_nlm;
#ifdef CK_ENCRYPTION
extern int tn_no_encrypt_xfer;
#endif /* CK_ENCRYPTION */
#endif /* TNCODE */
#ifdef TCPSOCKET
#ifndef NOLISTEN
extern int tcpsrfd;
#endif /* NOLISTEN */
#endif /* TCPSOCKET */
extern int cxseen, czseen, server, srvdis, local, displa, bctu, bctr, bctl;
extern int bctf;
extern int quiet, tsecs, parity, backgrd, nakstate, atcapu, wslotn, winlo;
extern int wslots, success, xitsta, rprintf, discard, cdtimo, keep, fdispla;
extern int timef, stdinf, rscapu, sendmode, epktflg, epktrcvd, epktsent;
extern int binary, fncnv, dest;
extern long speed, crc16;
extern CK_OFF_T calibrate, ffc;
#ifdef COMMENT
extern char *TYPCMD, *DIRCMD, *DIRCM2;
#endif /* COMMENT */
#ifndef OS2
extern char *SPACMD, *SPACM2, *WHOCMD;
#endif /* OS2 */
extern CHAR *rdatap;
extern struct zattr iattr;
#ifdef VMS
extern int batch;
#endif /* VMS */
#ifdef GFTIMER
extern CKFLOAT fptsecs;
#endif /* GFTIMER */
extern CHAR *srvcmd;
extern CHAR *epktmsg;
#ifdef CK_TMPDIR
extern int f_tmpdir; /* Directory changed temporarily */
extern char savdir[]; /* For saving current directory */
extern char * dldir;
#endif /* CK_TMPDIR */
extern int query; /* Query-active flag */
#ifndef NOSPL
extern int cmdlvl;
char querybuf[QBUFL+1] = { NUL, NUL }; /* QUERY response buffer */
char *qbufp = querybuf; /* Pointer to it */
int qbufn = 0; /* Length of data in it */
#else
extern int tlevel;
#endif /* NOSPL */
#ifndef NOICP
extern int escape;
#endif /* NOICP */
/*
If the following flag is nonzero when the protocol module is entered,
then server mode persists for exactly one transaction, rather than
looping until BYE or FINISH is received.
*/
extern int justone;
static int r_save = -1;
static int p_save = -1;
/* Function to let remote-mode user know where their file(s) went */
int whereflg = 1; /* Unset with SET XFER REPORT */
static VOID
wheremsg() {
extern int quiet;
extern long filrej;
long n;
n = filcnt - filrej;
debug(F101,"wheremsg n","",n);
debug(F110,"wheremsg prfspec",prfspec,0);
debug(F110,"wheremsg rfspec",rfspec,0);
debug(F110,"wheremsg psfspec",psfspec,0);
debug(F110,"wheremsg sfspec",sfspec,0);
debug(F110,"wheremsg prrfspec",prrfspec,0);
debug(F110,"wheremsg rrfspec",rrfspec,0);
debug(F110,"wheremsg psrfspec",psrfspec,0);
debug(F110,"wheremsg srfspec",srfspec,0);
if (!quiet && !local) {
if (n == 1) {
switch (myjob) {
case 's':
if (sfspec) {
printf(" SENT: [%s]",sfspec);
if (srfspec)
printf(" To: [%s]",srfspec);
printf(" (%s)\r\n", success ? "OK" : "FAILED");
}
break;
case 'r':
case 'v':
if (rrfspec) {
printf(" RCVD: [%s]",rrfspec);
if (rfspec)
printf(" To: [%s]",rfspec);
printf(" (%s)\r\n", success ? "OK" : "FAILED");
}
}
} else if (n > 1) {
switch (myjob) {
case 's':
if (sfspec) {
printf(" SENT: (%ld files)",n);
if (srfspec)
printf(" Last: [%s]",srfspec);
printf(" (%s)\r\n", success ? "OK" : "FAILED");
}
break;
case 'r':
case 'v':
if (rrfspec) {
printf(" RCVD: (%ld files)",n);
if (rfspec)
printf(" Last: [%s]",rfspec);
printf(" (%s)\r\n", success ? "OK" : "FAILED");
}
}
} else if (n == 0) {
if (myjob == 's')
printf(" SENT: (0 files) \r\n");
else if (myjob == 'r' || myjob == 'v')
printf(" RCVD: (0 files) \r\n");
}
}
}
static VOID
rdebug() {
if (server)
debug(F111,"RESUME","server=1",justone);
else
debug(F111,"RESUME","server=0",justone);
}
/* Flags for the ENABLE and DISABLE commands */
extern int
en_cpy, en_cwd, en_del, en_dir, en_fin, en_get, en_bye, en_mai, en_pri,
en_hos, en_ren, en_sen, en_spa, en_set, en_typ, en_who, en_ret, en_xit,
en_mkd, en_rmd;
#ifndef NOSPL
extern int en_asg, en_que;
#endif /* NOSPL */
extern int what, lastxfer;
/* Global variables declared here */
int whatru = 0; /* What are you. */
int whatru2 = 0; /* What are you, cont'd. */
/* Local variables */
static char vstate = 0; /* Saved State */
static char vcmd = 0; /* Saved Command */
static int reget = 0; /* Flag for executing REGET */
static int retrieve = 0; /* Flag for executing RETRIEVE */
static int opkt = 0; /* Send Extended GET packet */
static int x; /* General-purpose integer */
static char *s; /* General-purpose string pointer */
/* Macros - Note, BEGIN is predefined by Wart (and Lex) as "state = ", */
/* BEGIN is NOT a GOTO! */
#define TINIT if (tinit(1) < 0) return(-9)
#define SERVE { TINIT; resetc(); nakstate=1; what=W_NOTHING; cmarg2=""; \
sendmode=SM_SEND; havefs=0; recursive=r_save; fnspath=p_save; BEGIN serve; }
#define RESUME { rdebug(); if (!server) { wheremsg(); return(0); } else \
if (justone) { justone=0; wheremsg(); return(0); } else { SERVE; } }
#ifdef GFTIMER
#define QUIT x=quiet; quiet=1; clsif(); clsof(1); tsecs=gtimer(); \
fptsecs=gftimer(); quiet=x; return(success)
#else
#define QUIT x=quiet; quiet=1; clsif(); clsof(1); tsecs=gtimer(); quiet=x; \
return(success)
#endif /* GFTIMER */
/*
By late 1999, the big switch() statement generated from the following state
table began choking even gcc, so here we extract the code from the larger
states into static routines to reduce the size of the cases and the
switch() overall. The routines follow the state table; the prototypes are
here. Each of these routines simply contains the text from the
corresponding case, but with return(-1) added in appropriate places; see
instructions after the state table switcher.
*/
static int rc; /* Return code for these routines */
static int rcv_s_pkt(); /* Received an S packet */
static int rcv_firstdata(); /* Received first Data packet */
static int rcv_shortreply(); /* Short reply to a REMOTE command */
static int srv_query(); /* Server answers an query */
static int srv_copy(); /* Server executes REMOTE COPY */
static int srv_rename(); /* Server executes REMOTE RENAME */
static int srv_login(); /* Server executes REMOTE LOGIN */
static int srv_timeout(); /* Server times out */
%%
/*
Protocol entry points, one for each start state (sstate).
The lowercase letters are internal "inputs" from the user interface.
NOTE: The start state letters that appear on the left margin immediately
below can NOT be used as packet types OR as G-packet subcodes.
*/
s { TINIT; /* Send file(s) */
if (sinit() > 0) BEGIN ssinit;
else RESUME; }
v { TINIT; nakstate = 1; BEGIN get; } /* Receive file(s) */
r { /* Client sends a GET command */
TINIT;
vstate = get;
reget = 0;
retrieve = 0;
opkt = 0;
vcmd = 0;
#ifdef PKTZEROHACK
ipktack[0] = NUL;
#endif /* PKTZEROHACK */
if (sipkt('I') >= 0)
BEGIN ipkt;
else
RESUME;
}
h { /* Client sends a RETRIEVE command */
TINIT;
vstate = get;
reget = 0;
retrieve = 1;
opkt = 0;
vcmd = 0;
if (sipkt('I') >= 0)
BEGIN ipkt;
else
RESUME;
}
j { /* Client sends a REGET command */
TINIT;
vstate = get;
reget = 1;
retrieve = 0;
opkt = 0;
vcmd = 0;
if (sipkt('I') >= 0)
BEGIN ipkt;
else
RESUME;
}
o { /* Client sends Extended GET Packet */
TINIT;
vstate = get;
reget = oopts & GOPT_RES;
retrieve = oopts & GOPT_DEL;
opkt = 1;
vcmd = 0;
if (sipkt('I') >= 0)
BEGIN ipkt;
else
RESUME;
}
c { /* Client sends a Host command */
TINIT;
vstate = rgen;
vcmd = 'C';
if (sipkt('I') >= 0)
BEGIN ipkt;
else
RESUME;
}
k { TINIT; /* Client sends a Kermit command */
vstate = rgen;
vcmd = 'K';
if (sipkt('I') >= 0)
BEGIN ipkt;
else
RESUME;
}
g { /* Client sends a REMOTE command */
TINIT;
vstate = rgen;
vcmd = 'G';
if (sipkt('I') >= 0)
BEGIN ipkt;
else
RESUME;
}
x { /* Enter server mode */
int x;
x = justone;
if (!ENABLED(en_del)) { /* If DELETE is disabled */
if (fncact == XYFX_B || /* undo any file collision action */
fncact == XYFX_U || /* that could result in deletion or */
fncact == XYFX_A || /* modification of existing files. */
fncact == XYFX_X) {
#ifndef NOICP
extern int g_fncact;
g_fncact = fncact; /* Save current setting */
#endif /* NOICP */
fncact = XYFX_R; /* Change to RENAME */
debug(F101,"server DELETE disabled so fncact RENAME","",fncact);
}
}
SERVE; /* tinit() clears justone... */
justone = x;
#ifdef IKSDB
if (ikdbopen) slotstate(what, "SERVER", "", "");
#endif /* IKSDB */
}
a {
int b1 = 0, b2 = 0;
if (!data) TINIT; /* "ABEND" -- Tell other side. */
if (!bctf) { /* Block check 3 forced on all packets */
#ifndef pdp11
if (epktflg) { /* If because of E-PACKET command */
b1 = bctl; b2 = bctu; /* Save block check type */
bctl = bctu = 1; /* set it to 1 */
}
#endif /* pdp11 */
}
errpkt((CHAR *)"User cancelled"); /* Send the packet */
if (!bctf) { /* Block check 3 forced on all packets */
#ifndef pdp11
if (epktflg) { /* Restore the block check */
epktflg = 0;
bctl = b1; bctu = b2;
}
}
#endif /* pdp11 */
success = 0;
return(0); /* Return from protocol. */
}
/*
Dynamic states: <current-states>input-character { action }
nakstate != 0 means we're in a receiving state, in which we send ACKs & NAKs.
*/
<rgen,get,serve,ropkt>S { /* Receive Send-Init packet. */
rc = rcv_s_pkt();
cancel = 0; /* Reset cancellation counter */
debug(F101,"rcv_s_pkt","",rc);
if (rc > -1) return(rc); /* (see below) */
}
/* States in which we get replies back from commands sent to a server. */
/* Complicated because direction of protocol changes, packet number */
/* stays at zero through I-G-S sequence, and complicated even more by */
/* sliding windows buffer allocation. */
<ipkt>Y { /* Get ack for I-packet */
int x = 0;
#ifdef PKTZEROHACK
ckstrncpy(ipktack,(char *)rdatap,PKTZEROLEN); /* Save a copy of the ACK */
ipktlen = strlen(ipktack);
#endif /* PKTZEROHACK */
spar(rdatap); /* Set parameters */
cancel = 0;
winlo = 0; /* Set window-low back to zero */
debug(F101,"<ipkt>Y winlo","",winlo);
urserver = 1; /* So I know I'm talking to a server */
if (vcmd) { /* If sending a generic command */
if (tinit(0) < 0) return(-9); /* Initialize many things */
x = scmd(vcmd,(CHAR *)cmarg); /* Do that */
if (x >= 0) x = 0; /* (because of O-Packet) */
debug(F101,"proto G packet scmd","",x);
vcmd = 0; /* and then un-remember it. */
} else if (vstate == get) {
debug(F101,"REGET sstate","",sstate);
x = srinit(reget, retrieve, opkt); /* GET or REGET, etc */
}
if (x < 0) { /* If command was too long */
if (!srimsg)
srimsg = "Error sending string";
errpkt((CHAR *)srimsg); /* cancel both sides. */
success = 0;
RESUME;
} else if (x > 0) { /* Need to send more O-Packets */
BEGIN ssopkt;
} else {
rtimer(); /* Reset the elapsed seconds timer. */
#ifdef GFTIMER
rftimer();
#endif /* GFTIMER */
winlo = 0; /* Window back to 0, again. */
debug(F101,"<ipkt>Y vstate","",vstate);
nakstate = 1; /* Can send NAKs from here. */
BEGIN vstate; /* Switch to desired state */
}
}
<ssopkt>Y { /* Got ACK to O-Packet */
debug(F100,"CPCPRO <ssopkt>Y","",0);
x = sopkt();
debug(F101,"CPCPRO <ssopkt>Y x","",x);
if (x < 0) { /* If error */
errpkt((CHAR *)srimsg); /* cancel both sides. */
success = 0;
RESUME;
} else if (x == 0) { /* This was the last O-Packet */
rtimer(); /* Reset the elapsed seconds timer. */
#ifdef GFTIMER
rftimer();
#endif /* GFTIMER */
winlo = 0; /* Window back to 0, again. */
debug(F101,"<ssopkt>Y winlo","",winlo);
nakstate = 1; /* Can send NAKs from here. */
BEGIN vstate; /* Switch to desired state */
}
debug(F101,"CPCPRO <ssopkt>Y not changing state","",x);
}
<ipkt>E { /* Ignore Error reply to I packet */
int x = 0;
winlo = 0; /* Set window-low back to zero */
debug(F101,"<ipkt>E winlo","",winlo);
if (vcmd) { /* In case other Kermit doesn't */
if (tinit(0) < 0) return(-9);
x = scmd(vcmd,(CHAR *)cmarg); /* understand I-packets. */
if (x >= 0) x = 0; /* (because of O-Packet) */
vcmd = 0; /* Otherwise act as above... */
} else if (vstate == get) x = srinit(reget, retrieve, opkt);
if (x < 0) { /* If command was too long */
errpkt((CHAR *)srimsg); /* cancel both sides. */
success = 0;
RESUME;
} else if (x > 0) { /* Need to send more O-Packets */
BEGIN ssopkt;
} else {
freerpkt(winlo); /* Discard the Error packet. */
debug(F101,"<ipkt>E winlo","",winlo);
winlo = 0; /* Back to packet 0 again. */
nakstate = 1; /* Can send NAKs from here. */
BEGIN vstate;
}
}
<get>Y { /* Resend of previous I-pkt ACK, same seq number */
freerpkt(0); /* Free the ACK's receive buffer */
resend(0); /* Send the GET packet again. */
}
/* States in which we're being a server */
<serve,get>I { /* Get I-packet */
#ifndef NOSERVER
spar(rdatap); /* Set parameters from it */
ack1(rpar()); /* Respond with our own parameters */
#ifdef COMMENT
pktinit(); /* Reinitialize packet numbers */
#else
#ifdef COMMENT
/* This can't be right - it undoes the stuff we just negotiated */
x = justone;
tinit(1); /* Reinitialize EVERYTHING */
justone = x; /* But this... */
#else
tinit(0); /* Initialize most things */
#endif /* COMMENT */
#endif /* COMMENT */
#endif /* NOSERVER */
cancel = 0; /* Reset cancellation counter */
}
<serve>R { /* GET */
#ifndef NOSERVER
if (x_login && !x_logged) {
errpkt((CHAR *)"Login required");
SERVE;
} else if (sgetinit(0,0) < 0) {
RESUME;
} else {
#ifdef CKSYSLOG
if (ckxsyslog >= SYSLG_PR && ckxlogging)
cksyslog(SYSLG_PR, 1, "server", "GET", (char *)srvcmd);
#endif /* CKSYSLOG */
BEGIN ssinit;
}
#endif /* NOSERVER */
}
<serve>H { /* GET /DELETE (RETRIEVE) */
#ifndef NOSERVER
if (x_login && !x_logged) {
errpkt((CHAR *)"Login required");
RESUME;
} else if (!ENABLED(en_del)) {
errpkt((CHAR *)"Deleting files is disabled");
RESUME;
} else if (sgetinit(0,0) < 0) {
RESUME;
} else {
moving = 1;
#ifdef CKSYSLOG
if (ckxsyslog >= SYSLG_PR && ckxlogging)
cksyslog(SYSLG_PR, 1, "server", "GET /DELETE", (char *)srvcmd);
#endif /* CKSYSLOG */
BEGIN ssinit;
}
#endif /* NOSERVER */
}
<serve>V { /* GET /RECURSIVE */
#ifndef NOSERVER
recursive = 1; /* Set these before sgetinit() */
if (fnspath == PATH_OFF)
fnspath = PATH_REL; /* Don't worry, they will be */
if (x_login && !x_logged) { /* reset next time through. */
errpkt((CHAR *)"Login required");
RESUME;
} else if (sgetinit(0,0) < 0) {
RESUME;
} else {
#ifdef CKSYSLOG
if (ckxsyslog >= SYSLG_PR && ckxlogging)
cksyslog(SYSLG_PR, 1, "server", "GET /RECURSIVE", (char *)srvcmd);
#endif /* CKSYSLOG */
BEGIN ssinit;
}
#endif /* NOSERVER */
}
<serve>W { /* GET /RECURSIVE /DELETE */
#ifndef NOSERVER
recursive = 1; /* Set these before sgetinit() */
if (fnspath == PATH_OFF)
fnspath = PATH_REL; /* Don't worry, they will be */
moving = 1; /* reset next time through. */
if (x_login && !x_logged) {
errpkt((CHAR *)"Login required");
RESUME;
} else if (!ENABLED(en_del)) {
errpkt((CHAR *)"Deleting files is disabled");
RESUME;
} else if (sgetinit(0,0) < 0) {
RESUME;
} else {
#ifdef CKSYSLOG
if (ckxsyslog >= SYSLG_PR && ckxlogging)
cksyslog(SYSLG_PR,1,"server",
"GET /RECURSIVE /DELETE",(char *)srvcmd);
#endif /* CKSYSLOG */
BEGIN ssinit;
}
#endif /* NOSERVER */
}
<serve>J { /* GET /RECOVER (REGET) */
#ifndef NOSERVER
if (x_login && !x_logged) {
errpkt((CHAR *)"Login required");
SERVE;
} else if (sgetinit(1,0) < 0) {
RESUME;
} else {
#ifdef CKSYSLOG
if (ckxsyslog >= SYSLG_PR && ckxlogging)
cksyslog(SYSLG_PR, 1, "server", "GET /RECOVER", (char *)srvcmd);
#endif /* CKSYSLOG */
BEGIN ssinit;
}
#endif /* NOSERVER */
}
<serve>O { /* Extended GET */
#ifndef NOSERVER
if (x_login && !x_logged) { /* (any combination of options) */
errpkt((CHAR *)"Login required");
SERVE;
} else if ((x = sgetinit(0,1)) < 0) {
debug(F101,"CKCPRO <serve>O sgetinit fail","",x);
RESUME;
} else if (x == 0) {
debug(F101,"CKCPRO <serve>O sgetinit done","",x);
#ifdef CKSYSLOG
if (ckxsyslog >= SYSLG_PR && ckxlogging)
cksyslog(SYSLG_PR, 1, "server", "EXTENDED GET", (char *)srvcmd);
#endif /* CKSYSLOG */
BEGIN ssinit;
} else { /* Otherwise stay in this state */
debug(F101,"CKCPRO <serve>O sgetinit TBC","",x);
ack();
BEGIN ropkt;
}
#endif /* NOSERVER */
}
<ropkt>O {
#ifndef NOSERVER
if (x_login && !x_logged) { /* (any combination of options) */
errpkt((CHAR *)"Login required");
SERVE;
} else if ((x = sgetinit(0,1)) < 0) {
debug(F101,"CKCPRO <ropkt>O sgetinit fail","",x);
RESUME;
} else if (x == 0) {
debug(F101,"CKCPRO <ropkt>O sgetinit done","",x);
#ifdef CKSYSLOG
if (ckxsyslog >= SYSLG_PR && ckxlogging)
cksyslog(SYSLG_PR, 1, "server", "EXTENDED GET", (char *)srvcmd);
#endif /* CKSYSLOG */
BEGIN ssinit;
} else { /* Otherwise stay in this state */
debug(F101,"CKCPRO <ropkt>O sgetinit TBC","",x);
ack();
}
#endif /* NOSERVER */
}
<serve>G { /* Generic server command */
#ifndef NOSERVER
srvptr = srvcmd; /* Point to command buffer */
decode(rdatap,putsrv,0); /* Decode packet data into it */
putsrv(NUL); /* Insert a couple nulls */
putsrv(NUL); /* for termination */
if (srvcmd[0]) {
sstate = srvcmd[0]; /* Set requested start state */
if (x_login && !x_logged && /* Login required? */
/* Login, Logout, and Help are allowed when not logged in */
sstate != 'I' && sstate != 'L' && sstate != 'H') {
errpkt((CHAR *)"Login required");
SERVE;
} else {
nakstate = 0; /* Now I'm the sender. */
what = W_REMO; /* Doing a REMOTE command. */
#ifdef STREAMING
if (!streaming)
#endif /* STREAMING */
if (timint < 1)
timint = chktimo(rtimo,timef); /* Switch to per-packet timer */
binary = XYFT_T; /* Switch to text mode */
BEGIN generic; /* Switch to generic command state */
}
} else {
errpkt((CHAR *)"Badly formed server command"); /* report error */
RESUME; /* & go back to server command wait */
}
#endif /* NOSERVER */
}
<serve>C { /* Receive Host command */
#ifndef NOSERVER
if (x_login && !x_logged) {
errpkt((CHAR *)"Login required");
SERVE;
} else if (!ENABLED(en_hos)) {
errpkt((CHAR *)"REMOTE HOST disabled");
RESUME;
} else if (nopush) {
errpkt((CHAR *)"HOST commands not available");
RESUME;
} else {
srvptr = srvcmd; /* Point to command buffer */
decode(rdatap,putsrv,0); /* Decode command packet into it */
putsrv(NUL); /* Null-terminate */
nakstate = 0; /* Now sending, not receiving */
binary = XYFT_T; /* Switch to text mode */
if (syscmd((char *)srvcmd,"")) { /* Try to execute the command */
what = W_REMO; /* Doing a REMOTE command. */
#ifdef STREAMING
if (!streaming)
#endif /* STREAMING */
if (timint < 1)
timint = chktimo(rtimo,timef); /* Switch to per-packet timer */
#ifdef CKSYSLOG
if (ckxsyslog >= SYSLG_PR && ckxlogging)
cksyslog(SYSLG_PR, 1, "server", "REMOTE HOST", (char *)srvcmd);
#endif /* CKSYSLOG */
BEGIN ssinit; /* If OK, send back its output */
} else { /* Otherwise */
errpkt((CHAR *)"Can't do system command"); /* report error */
RESUME; /* & go back to server command wait */
}
}
#endif /* NOSERVER */
}
<serve>q { /* Interrupted or connection lost */
rc = srv_timeout();
debug(F101,"srv_timeout","",rc);
if (rc > -1) return(rc); /* (see below) */
}
<serve>N { /* Server got a NAK in command-wait */
#ifndef NOSERVER
errpkt((CHAR *)"Did you say RECEIVE instead of GET?");
RESUME;
#endif /* NOSERVER */
}
<serve>. { /* Any other command in this state */
#ifndef NOSERVER
if (c != ('E' - SP) && c != ('Y' - SP)) /* except E and Y packets. */
errpkt((CHAR *)"Unimplemented server function");
/* If we answer an E with an E, we get an infinite loop. */
/* A Y (ACK) can show up here if we sent back a short-form reply to */
/* a G packet and it was echoed. ACKs can be safely ignored here. */
RESUME; /* Go back to server command wait. */
#endif /* NOSERVER */
}
<generic>I { /* Login/Out */
rc = srv_login();
debug(F101,"<generic>I srv_login","",rc);
if (rc > -1) return(rc); /* (see below) */
}
<generic>C { /* Got REMOTE CD command */
#ifndef NOSERVER
#ifdef CKSYSLOG
if (ckxsyslog >= SYSLG_PR && ckxlogging)
cksyslog(SYSLG_PR, 1, "server", "REMOTE CD", (char *)srvcmd);
#endif /* CKSYSLOG */
if (!ENABLED(en_cwd)) {
errpkt((CHAR *)"REMOTE CD disabled");
RESUME;
} else {
char * p = NULL;
x = cwd((char *)(srvcmd+1)); /* Try to change directory */
#ifdef IKSDB
if (ikdbopen) slotstate(what,"REMOTE CD", (char *)(srvcmd+2), "");
#endif /* IKSDB */
if (!x) { /* Failed */
errpkt((CHAR *)"Can't change directory");
RESUME; /* Back to server command wait */
} else if (x == 2) { /* User wants message */
if (!ENABLED(en_typ)) { /* Messages (REMOTE TYPE) disabled? */
errpkt((CHAR *)"REMOTE TYPE disabled");
RESUME;
} else { /* TYPE is enabled */
int i;
for (i = 0; i < 8; i++) {
if (zchki(cdmsgfile[i]) > -1) {
break;
}
}
binary = XYFT_T; /* Use text mode for this. */
if (i < 8 && sndtype(cdmsgfile[i])) { /* Have readme file? */
BEGIN ssinit; /* OK */
} else { /* not OK */
p = zgtdir();
if (!p) p = "";
success = (*p) ? 1 : 0;
ack1((CHAR *)p); /* ACK with new directory name */
success = 1;
RESUME; /* wait for next server command */
}
}
} else { /* User doesn't want message */
p = zgtdir();
if (!p) p = "";
success = (*p) ? 1 : 0;
ack1((CHAR *)p);
success = 1;
RESUME; /* Wait for next server command */
}
}
#endif /* NOSERVER */
}
<generic>A { /* Got REMOTE PWD command */
#ifndef NOSERVER
#ifdef CKSYSLOG
if (ckxsyslog >= SYSLG_PR && ckxlogging)
cksyslog(SYSLG_PR, 1, "server", "REMOTE PWD", NULL);
#endif /* CKSYSLOG */
if (!ENABLED(en_cwd)) {
errpkt((CHAR *)"REMOTE CD disabled");
RESUME;
} else {
if (encstr((CHAR *)zgtdir()) > -1) { /* Encode current directory */
ack1(data); /* If it fits, send it back in ACK */
success = 1;
} else { /* Failed */
ack(); /* Send empty ACK */
success = 0; /* and indicate failure locally */
}
RESUME; /* Back to server command wait */
}
#endif /* NOSERVER */
}
<generic>D { /* REMOTE DIRECTORY command */
#ifndef NOSERVER
char *n2;
#ifdef CKSYSLOG
if (ckxsyslog >= SYSLG_PR && ckxlogging)
cksyslog(SYSLG_PR, 1, "server", "REMOTE DIRECTORY", (char *)srvcmd);
#endif /* CKSYSLOG */
if (!ENABLED(en_dir)) { /* If DIR is disabled, */
errpkt((CHAR *)"REMOTE DIRECTORY disabled"); /* refuse. */
RESUME;
} else { /* DIR is enabled. */
#ifdef IKSDB
if (ikdbopen) slotstate(what,"REMOTE DIR", (char *)(srvcmd+2), "");
#endif /* IKSDB */
if (!ENABLED(en_cwd)) { /* But CWD is disabled */
zstrip((char *)(srvcmd+2),&n2); /* and they included a pathname, */
if (strcmp((char *)(srvcmd+2),n2)) { /* so refuse. */
errpkt((CHAR *)"Access denied");
RESUME; /* Remember, this is not a goto! */
}
}
if (state == generic) { /* It's OK to go ahead. */
#ifdef COMMENT
n2 = (*(srvcmd+2)) ? DIRCMD : DIRCM2;
if (syscmd(n2,(char *)(srvcmd+2))) /* If it can be done */
#else
int x;
if ((x = snddir((char*)(srvcmd+2))) > 0)
#endif /* COMMENT */
{
BEGIN ssinit; /* send the results back; */
} else { /* otherwise */
if (x < 0)
errpkt((CHAR *)"No files match");
else
errpkt((CHAR *)"Can't list directory");
RESUME; /* return to server command wait */
}
}
}
#endif /* NOSERVER */
}
<generic>E { /* REMOTE DELETE (Erase) */
#ifndef NOSERVER
char *n2;
#ifdef CKSYSLOG
if (ckxsyslog >= SYSLG_PR && ckxlogging)
cksyslog(SYSLG_PR, 1, "server", "REMOTE DELETE", (char *)srvcmd);
#endif /* CKSYSLOG */
if (!ENABLED(en_del)) {
errpkt((CHAR *)"REMOTE DELETE disabled");
RESUME;
} else { /* DELETE is enabled */
#ifdef IKSDB
if (ikdbopen) slotstate(what,"REMOTE DELETE", (char *)(srvcmd+2), "");
#endif /* IKSDB */
if (!ENABLED(en_cwd)) { /* but CWD is disabled */
zstrip((char *)(srvcmd+2),&n2); /* and they included a pathname, */
if (strcmp((char *)(srvcmd+2),n2)) { /* so refuse. */
errpkt((CHAR *)"Access denied");