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2de56de377
deb-mbse/mbcico/binkp.c
Michiel Broek fc985db88c Added auto workaround for Irex binkp bug
2005-04-07 20:07:10 +00:00

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58 KiB
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/*****************************************************************************
*
* $Id$
* Purpose .................: Fidonet binkp protocol
* Binkp protocol copyright : Dima Maloff.
*
*****************************************************************************
* Copyright (C) 1997-2004
*
* Michiel Broek FIDO: 2:280/2802
* Beekmansbos 10
* 1971 BV IJmuiden
* the Netherlands
*
* This file is part of MBSE BBS.
*
* This BBS is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* MBSE BBS is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MBSE BBS; see the file COPYING. If not, write to the Free
* Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*****************************************************************************/
#include "../config.h"
#include "../lib/mbselib.h"
#include "../lib/users.h"
#include "../lib/nodelist.h"
#include "../lib/mbsedb.h"
#include "ttyio.h"
#include "session.h"
#include "statetbl.h"
#include "config.h"
#include "emsi.h"
#include "openfile.h"
#include "respfreq.h"
#include "filelist.h"
#include "opentcp.h"
#include "rdoptions.h"
#include "lutil.h"
#include "binkp.h"
#include "config.h"
#include "md5b.h"
#include "inbound.h"
/*
* Safe characters for binkp filenames, the rest will be escaped.
*/
#define BNKCHARS "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789@&=+%$-_.!()#|"
static char *bstate[] = {
(char *)"M_NUL", (char *)"M_ADR", (char *)"M_PWD", (char *)"M_FILE", (char *)"M_OK",
(char *)"M_EOB", (char *)"M_GOT", (char *)"M_ERR", (char *)"M_BSY", (char *)"M_GET",
(char *)"M_SKIP"
};
extern char *tempinbound;
extern char *ttystat[];
extern int Loaded;
extern pid_t mypid;
extern struct sockaddr_in peeraddr;
extern int most_debug;
extern unsigned long sentbytes;
extern unsigned long rcvdbytes;
typedef enum {RxWaitF, RxAccF, RxReceD, RxWriteD, RxEOB, RxDone} RxType;
typedef enum {TxGNF, TxTryR, TxReadS, TxWLA, TxDone} TxType;
typedef enum {Ok, Failure, Continue} TrType;
typedef enum {No, WeCan, WeWant, TheyWant, Active} OptionState;
typedef enum {NoState, Sending, IsSent, Got, Skipped, Get} FileState;
typedef enum {InitTransfer, Switch, Receive, Transmit, DeinitTransfer} FtType;
static char *rxstate[] = { (char *)"RxWaitF", (char *)"RxAccF", (char *)"RxReceD",
(char *)"RxWriteD", (char *)"RxEOB", (char *)"RxDone" };
static char *opstate[] = { (char *)"No", (char *)"WeCan", (char *)"WeWant", (char *)"TheyWant", (char *)"Active" };
static time_t Timer;
int ext_rand = 0;
the_queue *tql = NULL; /* The Queue List */
file_list *tosend = NULL; /* Files to send */
file_list *respond = NULL; /* Requests honored */
binkp_list *bll = NULL; /* Files to send with status */
static binkp_list *cursend = NULL; /* Current file being transmitted */
struct timeval txtvstart; /* Transmitter start time */
struct timeval txtvend; /* Transmitter end time */
struct timeval rxtvstart; /* Receiver start time */
struct timeval rxtvend; /* Receiver end time */
struct binkprec {
int Role; /* 1=orig, 0=answer */
int RxState; /* Receiver state */
int TxState; /* Transmitter state */
int FtState; /* File transfer state */
/* Option flags */
int CRAMflag; /* CRAM authentication */
/* Session state */
int Secure; /* Secure session */
int Major; /* Major protocol version */
int Minor; /* Minor protocol version */
unsigned char *MD_Challenge; /* Received challenge data */
int PLZflag; /* Zlib packet compression */
int cmpblksize; /* Ideal next blocksize */
/* Receiver buffer */
char *rxbuf; /* Receiver buffer */
int GotFrame; /* Frame complete flag */
int rxlen; /* Frame length */
int cmd; /* Frame command flag */
int blklen; /* Frame blocklength */
unsigned short header; /* Frame header */
int rc; /* General return code */
long rsize; /* Receiver filesize */
long roffs; /* Receiver offset */
char *rname; /* Receiver filename */
time_t rtime; /* Receiver filetime */
FILE *rxfp; /* Receiver file */
off_t rxbytes; /* Receiver bytecount */
int rxpos; /* Receiver position */
int rxcompressed; /* Receiver compressed bytes */
struct timezone tz; /* Timezone */
int DidSendGET; /* Receiver send GET status */
char *txbuf; /* Transmitter buffer */
int txlen; /* Transmitter file length */
FILE *txfp; /* Transmitter file */
int txpos; /* Transmitter position */
int stxpos; /* Transmitter start position */
int txcompressed; /* Transmitter compressed bytes */
int local_EOB; /* Local EOB sent */
int remote_EOB; /* Got EOB from remote */
int messages; /* Messages sent + rcvd */
unsigned long nethold; /* Netmail on hold */
unsigned long mailhold; /* Packed mail on hold */
int batchnr;
int msgs_on_queue; /* Messages on the queue */
int buggyIrex; /* Buggy Irex detected */
};
struct binkprec bp; /* Global structure */
/*
* Prototypes
*/
TrType binkp_receiver(void); /* Receiver routine */
TrType binkp_transmitter(void); /* Transmitter routine */
int binkp_send_frame(int, char *, int); /* Send cmd/data frame */
int binkp_send_command(int, ...); /* Send command frame */
void binkp_settimer(int); /* Set timeout timer */
int binkp_expired(void); /* Timer expired? */
int binkp_banner(void); /* Send system banner */
int binkp_recv_command(char *, unsigned long *, int *); /* Receive command frame */
void parse_m_nul(char *); /* Parse M_NUL message */
int binkp_poll_frame(void); /* Poll for a frame */
void binkp_add_message(char *frame); /* Add cmd frame to queue */
int binkp_process_messages(void); /* Process the queue */
int binkp_resync(off_t); /* File resync */
char *unix2binkp(char *); /* Binkp -> Unix escape */
char *binkp2unix(char *); /* Unix -> Binkp escape */
void fill_binkp_list(binkp_list **, file_list *, off_t); /* Build pending files */
int binkp_pendingfiles(void); /* Count pending files */
void binkp_clear_filelist(int); /* Clear current filelist */
static int orgbinkp(void); /* Originate session state */
static int ansbinkp(void); /* Answer session state */
static int file_transfer(void); /* File transfer state */
/************************************************************************************/
/*
* General entry point
*/
int binkp(int role)
{
int rc = 0;
Syslog('+', "Binkp: start session");
memset(&bp, 0, sizeof(bp));
bp.Role = role;
bp.CRAMflag = FALSE;
bp.Secure = FALSE;
bp.Major = 1;
bp.Minor = 0;
bp.MD_Challenge = NULL;
bp.rxbuf = calloc(MAX_BLKSIZE + 3, sizeof(unsigned char));
bp.txbuf = calloc(MAX_BLKSIZE + 3, sizeof(unsigned char));
bp.rname = calloc(512, sizeof(char));
bp.rxfp = NULL;
bp.DidSendGET = FALSE;
bp.local_EOB = FALSE;
bp.remote_EOB = FALSE;
bp.msgs_on_queue = 0;
bp.cmpblksize = SND_BLKSIZE;
#ifdef HAVE_ZLIB_H
bp.PLZflag = WeCan;
#else
bp.PLZflag = No;
#endif
bp.buggyIrex = FALSE;
if (role == 1) {
if (orgbinkp()) {
rc = MBERR_SESSION_ERROR;
}
} else {
if (ansbinkp()) {
rc = MBERR_SESSION_ERROR;
}
}
if (rc) {
Syslog('!', "Binkp: session handshake failed");
goto binkpend;
}
if (((Loaded && nodes.NoBinkp11) || bp.buggyIrex) && (bp.Major == 1) && (bp.Minor != 0)) {
Syslog('+', "Binkp: forcing downgrade to binkp/1.0 protocol");
bp.Major = 1;
bp.Minor = 0;
}
if (localoptions & NOFREQS)
session_flags &= ~SESSION_WAZOO;
else
session_flags |= SESSION_WAZOO;
bp.FtState = InitTransfer;
rc = file_transfer();
binkpend:
/*
* Deinit
*/
if (bp.rname)
free(bp.rname);
if (bp.MD_Challenge)
free(bp.MD_Challenge);
if (bp.rxbuf)
free(bp.rxbuf);
if (bp.txbuf)
free(bp.txbuf);
rc = abs(rc);
Syslog('+', "Binkp: session finished, rc=%d", rc);
return rc;
}
/************************************************************************************/
/*
* Originate Session Setup
*/
SM_DECL(orgbinkp, (char *)"orgbinkp")
SM_STATES
ConnInit,
WaitConn,
SendPasswd,
WaitAddr,
AuthRemote,
IfSecure,
WaitOk,
Opts
SM_NAMES
(char *)"ConnInit",
(char *)"WaitConn",
(char *)"SendPasswd",
(char *)"WaitAddr",
(char *)"AuthRemote",
(char *)"IfSecure",
(char *)"WaitOk",
(char *)"Opts"
SM_EDECL
faddr *primary;
char *p, *q, *pwd;
int i, rc = 0, cmd, dupe, SendPass = FALSE, akas = 0;
unsigned long bufl;
fa_list **tmp, *tmpa;
faddr *fa, ra;
SM_START(ConnInit)
SM_STATE(ConnInit)
SM_PROCEED(WaitConn)
SM_STATE(WaitConn)
Loaded = FALSE;
Syslog('+', "Binkp: node %s", ascfnode(remote->addr, 0x1f));
IsDoing("Connect binkp %s", ascfnode(remote->addr, 0xf));
/*
* Build options we want
*/
p = xstrcpy((char *)"OPT");
#ifdef HAVE_ZLIB_H
if (bp.PLZflag == WeCan) {
p = xstrcat(p, (char *)" PLZ");
bp.PLZflag = WeWant;
}
#endif
if (strcmp(p, (char *)"OPT"))
rc = binkp_send_command(MM_NUL, p);
free(p);
if (rc) {
SM_ERROR;
}
rc = binkp_banner();
if (rc) {
SM_ERROR;
}
/*
* Build a list of aka's to send, the primary aka first.
*/
ra.zone = remote->addr->zone;
ra.net = remote->addr->net;
ra.node = remote->addr->node;
ra.point = remote->addr->point;
primary = bestaka_s(remote->addr);
p = xstrcpy(ascfnode(primary, 0x1f));
/*
* Add all other aka's exept primary aka.
*/
for (i = 0; i < 40; i++) {
if ((CFG.aka[i].zone) && (CFG.akavalid[i]) &&
((CFG.aka[i].zone != primary->zone) || (CFG.aka[i].net != primary->net) ||
(CFG.aka[i].node != primary->node) || (CFG.aka[i].point!= primary->point))) {
p = xstrcat(p, (char *)" ");
p = xstrcat(p, aka2str(CFG.aka[i]));
}
}
rc = binkp_send_command(MM_ADR, "%s", p);
free(p);
tidy_faddr(primary);
if (rc) {
SM_ERROR;
}
SM_PROCEED(WaitAddr)
SM_STATE(WaitAddr)
for (;;) {
if ((rc = binkp_recv_command(bp.rxbuf, &bufl, &cmd))) {
Syslog('!', "Binkp: error receiving remote info");
SM_ERROR;
}
if (cmd) {
if (bp.rxbuf[0] == MM_ADR) {
p = xstrcpy(bp.rxbuf + 1);
tidy_falist(&remote);
remote = NULL;
tmp = &remote;
for (q = strtok(p, " "); q; q = strtok(NULL, " ")) {
if ((fa = parsefnode(q))) {
dupe = FALSE;
for (tmpa = remote; tmpa; tmpa = tmpa->next) {
if ((tmpa->addr->zone == fa->zone) && (tmpa->addr->net == fa->net) &&
(tmpa->addr->node == fa->node) && (tmpa->addr->point == fa->point) &&
(strcmp(tmpa->addr->domain, fa->domain) == 0)) {
dupe = TRUE;
Syslog('b', "Binkp: double address %s", ascfnode(tmpa->addr, 0x1f));
break;
}
}
if (!dupe) {
*tmp = (fa_list*)malloc(sizeof(fa_list));
(*tmp)->next = NULL;
(*tmp)->addr = fa;
tmp = &((*tmp)->next);
}
} else {
Syslog('!', "Binkp: unparsable remote address: \"%s\"", printable(q, 0));
binkp_send_command(MM_ERR, "Unparsable address \"%s\"", printable(q, 0));
SM_ERROR;
}
}
free(p);
tmp = &remote;
while (*tmp) {
if (nodelock((*tmp)->addr, mypid)) {
Syslog('+', "address : %s is locked, removed from aka list",ascfnode((*tmp)->addr,0x1f));
tmpa=*tmp;
*tmp=(*tmp)->next;
free(tmpa);
} else {
/*
* With the loaded flag we prevent removing the noderecord
* when the remote presents us an address we don't know about.
*/
akas++;
Syslog('+', "address : %s",ascfnode((*tmp)->addr,0x1f));
if (!Loaded) {
if (noderecord((*tmp)->addr))
Loaded = TRUE;
}
tmp = &((*tmp)->next);
}
}
if (akas == 0) {
binkp_send_command(MM_BSY, "All aka's busy");
Syslog('+', "Binkp: abort, all aka's are busy");
SM_ERROR;
}
history.aka.zone = remote->addr->zone;
history.aka.net = remote->addr->net;
history.aka.node = remote->addr->node;
history.aka.point = remote->addr->point;
sprintf(history.aka.domain, "%s", printable(remote->addr->domain, 0));
SM_PROCEED(SendPasswd)
} else if (bp.rxbuf[0] == MM_BSY) {
Syslog('!', "Binkp: M_BSY \"%s\"", printable(bp.rxbuf +1, 0));
SM_ERROR;
} else if (bp.rxbuf[0] == MM_ERR) {
Syslog('!', "Binkp: M_ERR \"%s\"", printable(bp.rxbuf +1, 0));
SM_ERROR;
} else if (bp.rxbuf[0] == MM_NUL) {
parse_m_nul(bp.rxbuf +1);
} else {
binkp_send_command(MM_ERR, "Unexpected frame");
SM_ERROR;
}
} else {
binkp_send_command(MM_ERR, "Unexpected frame");
SM_ERROR;
}
}
SM_STATE(SendPasswd)
if (Loaded && strlen(nodes.Spasswd)) {
pwd = xstrcpy(nodes.Spasswd);
SendPass = TRUE;
} else {
pwd = xstrcpy((char *)"-");
}
if (bp.MD_Challenge) {
char *tp = NULL;
tp = MD_buildDigest(pwd, bp.MD_Challenge);
if (!tp) {
Syslog('!', "Unable to build MD5 digest");
binkp_send_command(MM_ERR, "CRAM authentication failed, internal error");
SM_ERROR;
}
bp.CRAMflag = TRUE;
rc = binkp_send_command(MM_PWD, "%s", tp);
free(tp);
} else {
rc = binkp_send_command(MM_PWD, "%s", pwd);
}
free(pwd);
if (rc) {
SM_ERROR;
}
SM_PROCEED(AuthRemote)
SM_STATE(AuthRemote)
rc = 0;
for (tmpa = remote; tmpa; tmpa = tmpa->next) {
if ((tmpa->addr->zone == ra.zone) && (tmpa->addr->net == ra.net) &&
(tmpa->addr->node == ra.node) && (tmpa->addr->point == ra.point)) {
rc = 1;
}
}
if (rc) {
SM_PROCEED(IfSecure)
} else {
Syslog('!', "Binkp: error, the wrong node is reached");
binkp_send_command(MM_ERR, "No AKAs in common or all AKAs busy");
SM_ERROR;
}
SM_STATE(IfSecure)
SM_PROCEED(WaitOk)
SM_STATE(WaitOk)
for (;;) {
if ((rc = binkp_recv_command(bp.rxbuf, &bufl, &cmd))) {
Syslog('!', "Binkp: error waiting for remote acknowledge");
SM_ERROR;
}
if (cmd) {
if (bp.rxbuf[0] == MM_OK) {
Syslog('b', "Binkp: M_OK \"%s\"", printable(bp.rxbuf +1, 0));
if (SendPass)
bp.Secure = TRUE;
Syslog('+', "Binkp: %s%sprotected session", bp.CRAMflag ? "MD5 ":"", bp.Secure ? "":"un");
SM_PROCEED(Opts)
} else if (bp.rxbuf[0] == MM_BSY) {
Syslog('!', "Binkp: M_BSY \"%s\"", printable(bp.rxbuf +1, 0));
SM_ERROR;
} else if (bp.rxbuf[0] == MM_ERR) {
Syslog('!', "Binkp: M_ERR \"%s\"", printable(bp.rxbuf +1, 0));
SM_ERROR;
} else if (bp.rxbuf[0] == MM_NUL) {
parse_m_nul(bp.rxbuf +1);
} else {
binkp_send_command(MM_ERR, "Unexpected frame");
SM_ERROR;
}
} else {
binkp_send_command(MM_ERR, "Unexpected frame");
SM_ERROR;
}
}
SM_STATE(Opts)
IsDoing("Binkp to %s", ascfnode(remote->addr, 0xf));
SM_SUCCESS;
SM_END
SM_RETURN
/************************************************************************************/
/*
* Answer Session Setup
*/
SM_DECL(ansbinkp, (char *)"ansbinkp")
SM_STATES
ConnInit,
WaitConn,
WaitAddr,
IsPasswd,
WaitPwd,
PwdAck,
Opts
SM_NAMES
(char *)"ConnInit",
(char *)"WaitConn",
(char *)"WaitAddr",
(char *)"IsPasswd",
(char *)"WaitPwd",
(char *)"PwdAck",
(char *)"Opts"
SM_EDECL
char *p, *q, *pw;
int i, rc, cmd, dupe, we_have_pwd = FALSE, akas = 0;
unsigned long bufl;
fa_list **tmp, *tmpa;
faddr *fa;
SM_START(ConnInit)
SM_STATE(ConnInit)
SM_PROCEED(WaitConn)
SM_STATE(WaitConn)
Loaded = FALSE;
if (strncmp(SockR("SBBS:0;"), "100:2,1", 7) == 0) {
Syslog('+', "Binkp: system is closed, sending M_BSY");
binkp_send_command(MM_BSY, "This system is closed, try again later");
SM_ERROR;
}
if (!CFG.NoMD5 && ((bp.MD_Challenge = MD_getChallenge(NULL, &peeraddr)) != NULL)) {
/*
* Answering site MUST send CRAM message as very first M_NUL
*/
char s[MD5_DIGEST_LEN*2+15]; /* max. length of opt string */
strcpy(s, "OPT ");
#ifdef HAVE_ZLIB_H
if (bp.PLZflag == WeCan) {
strcpy(s + strlen(s), "PLZ ");
bp.PLZflag = WeWant;
}
#endif
MD_toString(s + strlen(s), bp.MD_Challenge[0], bp.MD_Challenge+1);
bp.CRAMflag = TRUE;
if ((rc = binkp_send_command(MM_NUL, "%s", s))) {
SM_ERROR;
}
}
if ((rc = binkp_banner())) {
SM_ERROR;
}
p = xstrcpy((char *)"");
for (i = 0; i < 40; i++) {
if ((CFG.aka[i].zone) && (CFG.akavalid[i])) {
p = xstrcat(p, (char *)" ");
p = xstrcat(p, aka2str(CFG.aka[i]));
}
}
rc = binkp_send_command(MM_ADR, "%s", p);
free(p);
if (rc) {
SM_ERROR;
}
SM_PROCEED(WaitAddr)
SM_STATE(WaitAddr)
for (;;) {
if ((rc = binkp_recv_command(bp.rxbuf, &bufl, &cmd))) {
Syslog('!', "Binkp: error waiting for remote info");
SM_ERROR;
}
if (cmd) {
if (bp.rxbuf[0] == MM_ADR) {
p = xstrcpy(bp.rxbuf +1);
tidy_falist(&remote);
remote = NULL;
tmp = &remote;
for (q = strtok(p, " "); q; q = strtok(NULL, " ")) {
if ((fa = parsefnode(q))) {
dupe = FALSE;
for (tmpa = remote; tmpa; tmpa = tmpa->next) {
if ((tmpa->addr->zone == fa->zone) && (tmpa->addr->net == fa->net) &&
(tmpa->addr->node == fa->node) && (tmpa->addr->point == fa->point) &&
(strcmp(tmpa->addr->domain, fa->domain) == 0)) {
dupe = TRUE;
Syslog('b', "Binkp: double address %s", ascfnode(tmpa->addr, 0x1f));
break;
}
}
if (!dupe) {
*tmp = (fa_list*)malloc(sizeof(fa_list));
(*tmp)->next = NULL;
(*tmp)->addr = fa;
tmp = &((*tmp)->next);
}
} else {
Syslog('!', "Binkp: unparsable remote address: \"%s\"", printable(q, 0));
binkp_send_command(MM_ERR, "Unparsable address \"%s\"", printable(q, 0));
SM_ERROR;
}
}
tmp = &remote;
while (*tmp) {
if (nodelock((*tmp)->addr, mypid)) {
Syslog('+', "address : %s is locked, removed from aka list",ascfnode((*tmp)->addr,0x1f));
tmpa=*tmp;
*tmp=(*tmp)->next;
free(tmpa);
} else {
/*
* With the loaded flag we prevent removing the noderecord
* when the remote presents us an address we don't know about.
*/
akas++;
Syslog('+', "address : %s",ascfnode((*tmp)->addr,0x1f));
if (!Loaded) {
if (noderecord((*tmp)->addr))
Loaded = TRUE;
}
tmp = &((*tmp)->next);
}
}
if (akas == 0) {
binkp_send_command(MM_BSY, "All aka's busy");
Syslog('+', "Binkp: abort, all aka's are busy");
SM_ERROR;
}
for (tmpa = remote; tmpa; tmpa = tmpa->next) {
if (((nlent = getnlent(tmpa->addr))) && (nlent->pflag != NL_DUMMY)) {
Syslog('+', "Binkp: remote is a listed system");
UserCity(mypid, nlent->sysop, nlent->location);
break;
}
}
if (nlent)
rdoptions(Loaded);
history.aka.zone = remote->addr->zone;
history.aka.net = remote->addr->net;
history.aka.node = remote->addr->node;
history.aka.point = remote->addr->point;
sprintf(history.aka.domain, "%s", printable(remote->addr->domain, 0));
SM_PROCEED(IsPasswd)
} else if (bp.rxbuf[0] == MM_ERR) {
Syslog('!', "Binkp: M_ERR \"%s\"", printable(bp.rxbuf +1, 0));
SM_ERROR;
} else if (bp.rxbuf[0] == MM_NUL) {
parse_m_nul(bp.rxbuf +1);
} else if (bp.rxbuf[0] <= MM_MAX) {
binkp_send_command(MM_ERR, "Unexpected frame");
SM_ERROR;
}
} else {
binkp_send_command(MM_ERR, "Unexpected frame");
SM_ERROR;
}
}
SM_STATE(IsPasswd)
if (Loaded && strlen(nodes.Spasswd)) {
we_have_pwd = TRUE;
}
SM_PROCEED(WaitPwd)
SM_STATE(WaitPwd)
for (;;) {
if ((rc = binkp_recv_command(bp.rxbuf, &bufl, &cmd))) {
Syslog('!', "Binkp: error waiting for password");
SM_ERROR;
}
if (cmd) {
if (bp.rxbuf[0] == MM_PWD) {
SM_PROCEED(PwdAck)
} else if (bp.rxbuf[0] == MM_ERR) {
Syslog('!', "Binkp: M_ERR \"%s\"", printable(bp.rxbuf +1, 0));
SM_ERROR;
} else if (bp.rxbuf[0] == MM_NUL) {
parse_m_nul(bp.rxbuf +1);
} else if (bp.rxbuf[0] <= MM_MAX) {
binkp_send_command(MM_ERR, "Unexpected frame");
SM_ERROR;
}
} else {
binkp_send_command(MM_ERR, "Unexpected frame");
SM_ERROR;
}
}
SM_STATE(PwdAck)
if (we_have_pwd) {
pw = xstrcpy(nodes.Spasswd);
} else {
pw = xstrcpy((char *)"-");
}
if ((strncmp(bp.rxbuf +1, "CRAM-", 5) == 0) && bp.CRAMflag) {
char *sp;
sp = MD_buildDigest(pw, bp.MD_Challenge);
if (sp != NULL) {
if (strcmp(bp.rxbuf +1, sp)) {
Syslog('+', "Binkp: bad MD5 crypted password");
binkp_send_command(MM_ERR, "Bad password");
free(sp);
sp = NULL;
free(pw);
SM_ERROR;
} else {
free(sp);
sp = NULL;
if (we_have_pwd)
bp.Secure = TRUE;
}
} else {
free(pw);
Syslog('!', "Binkp: could not build MD5 digest");
binkp_send_command(MM_ERR, "*** Internal error ***");
SM_ERROR;
}
} else if ((strcmp(bp.rxbuf +1, pw) == 0)) {
if (we_have_pwd)
bp.Secure = TRUE;
} else {
free(pw);
Syslog('?', "Binkp: password error: expected \"%s\", got \"%s\"", nodes.Spasswd, bp.rxbuf +1);
binkp_send_command(MM_ERR, "Bad password");
SM_ERROR;
}
free(pw);
Syslog('+', "Binkp: %s%sprotected session", bp.CRAMflag ? "MD5 ":"", bp.Secure ? "":"un");
inbound_open(remote->addr, bp.Secure);
binkp_send_command(MM_OK, "%ssecure", bp.Secure ? "":"non-");
SM_PROCEED(Opts)
SM_STATE(Opts)
IsDoing("Binkp from %s", ascfnode(remote->addr, 0xf));
SM_SUCCESS;
SM_END
SM_RETURN
/************************************************************************************/
/*
* File Transfer State
*/
/*
* We do not use the normal state machine because that produces a lot
* of debug logging that will drive up the CPU usage.
*/
int file_transfer(void)
{
int rc = 0;
TrType Trc = Ok;
for (;;) {
switch (bp.FtState) {
case InitTransfer: binkp_settimer(BINKP_TIMEOUT);
bp.RxState = RxWaitF;
bp.TxState = TxGNF;
bp.FtState = Switch;
bp.messages = 0;
break;
case Switch: if ((bp.RxState == RxDone) && (bp.TxState == TxDone)) {
bp.FtState = DeinitTransfer;
break;
}
rc = binkp_poll_frame();
if (rc == -1) {
Syslog('b', "Binkp: receiver error detected");
bp.rc = rc = MBERR_FTRANSFER;
bp.FtState = DeinitTransfer;
break;
} else if (rc == 1) {
bp.FtState = Receive;
break;
}
/*
* Check if there is room in the output buffer
*/
if (WAITPUTGET(-1) & 2) {
bp.FtState = Transmit;
break;
}
if (binkp_expired()) {
Syslog('+', "Binkp: transfer timeout");
bp.rc = 1;
bp.FtState = DeinitTransfer;
break;
}
/*
* Nothing done, release
*/
msleep(1);
break;
case Receive: Trc = binkp_receiver();
if (Trc == Ok) {
if (bp.local_EOB && bp.remote_EOB)
bp.FtState = Transmit;
else
bp.FtState = Switch;
} else if (Trc == Failure) {
Syslog('+', "Binkp: receiver failure");
bp.rc = 1;
bp.FtState = DeinitTransfer;
}
break;
case Transmit: Trc = binkp_transmitter();
if (Trc == Ok) {
bp.FtState = Switch;
} else if (Trc == Failure) {
Syslog('+', "Binkp: transmitter failure");
bp.rc = 1;
bp.FtState = DeinitTransfer;
}
break;
case DeinitTransfer:/*
* In case of a transfer error the filelist is not yet cleared
*/
binkp_clear_filelist(bp.rc);
if (bp.rc)
return MBERR_FTRANSFER;
else
return 0;
break;
}
}
}
/************************************************************************************/
/*
* Receiver routine
*/
TrType binkp_receiver(void)
{
int bcmd, rc = 0;
struct statfs sfs;
long written;
off_t rxbytes;
if (bp.RxState == RxWaitF) {
if (! bp.GotFrame)
return Ok;
bp.GotFrame = FALSE;
bp.rxlen = 0;
bp.header = 0;
if (! bp.cmd) {
Syslog('b', "Binkp: got %d bytes DATA frame in %s state, ignored", bp.blklen, rxstate[bp.RxState]);
bp.blklen = 0;
return Ok;
}
bp.blklen = 0;
bcmd = bp.rxbuf[0];
if (bcmd == MM_ERR) {
Syslog('+', "Binkp: got M_ERR \"%s\"", printable(bp.rxbuf +1, 0));
bp.RxState = RxDone;
return Failure;
} else if ((bcmd == MM_GET) || (bcmd == MM_GOT) || (bcmd == MM_SKIP)) {
binkp_add_message(bp.rxbuf);
return Ok;
} else if (bcmd == MM_NUL) {
parse_m_nul(bp.rxbuf +1);
return Ok;
} else if (bcmd == MM_EOB) {
if ((bp.Major == 1) && (bp.Minor != 0)) {
if (bp.local_EOB && bp.remote_EOB) {
Syslog('b', "Binkp: receiver detects both sides in EOB state");
if ((bp.messages < 3) || binkp_pendingfiles()) {
Syslog('b', "Binkp: receiver detected end of session or pendingfiles, stay in RxWaitF");
return Ok;
} else {
bp.batchnr++;
bp.local_EOB = FALSE;
bp.remote_EOB = FALSE;
bp.messages = 0;
bp.TxState = TxGNF;
bp.RxState = RxWaitF;
Syslog('+', "Binkp: receiver starts batch %d", bp.batchnr + 1);
binkp_clear_filelist(0);
return Ok;
}
} else {
return Ok;
}
} else {
Syslog('b', "Binkp/1.0 mode and got M_EOB, goto RxEOB");
bp.RxState = RxEOB;
return Ok;
}
} else if (bcmd == MM_FILE) {
bp.RxState = RxAccF;
return Continue;
} else if (bcmd <= MM_MAX) {
Syslog('+', "Binkp: ERROR got unexpected %s frame in %s state", bstate[bcmd], rxstate[bp.RxState]);
bp.RxState = RxDone;
return Failure;
} else {
Syslog('+', "Binkp: got unexpected unknown frame, ignore");
return Ok;
}
} else if (bp.RxState == RxAccF) {
if (strlen(bp.rxbuf) < 512) {
sprintf(bp.rname, "%s", strtok(bp.rxbuf+1, " \n\r"));
bp.rsize = atoi(strtok(NULL, " \n\r"));
bp.rtime = atoi(strtok(NULL, " \n\r"));
bp.roffs = atoi(strtok(NULL, " \n\r"));
} else {
/*
* Corrupted command, in case this was serious, send the M_GOT back so it's
* deleted at the remote.
*/
Syslog('+', "Binkp: got corrupted FILE frame, size %d bytes", strlen(bp.rxbuf));
bp.RxState = RxWaitF;
rc = binkp_send_command(MM_GOT, bp.rxbuf +1);
if (rc)
return Failure;
else
return Ok;
}
Syslog('+', "Binkp: receive file \"%s\" date %s size %ld offset %ld", bp.rname, date(bp.rtime), bp.rsize, bp.roffs);
(void)binkp2unix(bp.rname);
rxbytes = bp.rxbytes;
bp.rxfp = openfile(binkp2unix(bp.rname), bp.rtime, bp.rsize, &rxbytes, binkp_resync);
bp.rxbytes = rxbytes;
bp.rxcompressed = 0;
if (bp.DidSendGET) {
Syslog('b', "Binkp: DidSendGET is set");
/*
* The file was partly received, via the openfile the resync function
* has send a GET command to start this file with a offset. This means
* we will get a new FILE command to open this file with a offset.
*/
bp.RxState = RxWaitF;
return Ok;
}
gettimeofday(&rxtvstart, &bp.tz);
bp.rxpos = bp.roffs;
if (enoughspace(CFG.freespace) == 0) {
Syslog('+', "Binkp: low diskspace, sending BSY");
binkp_send_command(MM_BSY, "Low diskspace, try again later");
bp.RxState = RxDone;
bp.TxState = TxDone;
bp.rc = MBERR_FTRANSFER;
return Failure;
}
if (statfs(tempinbound, &sfs) == 0) {
if ((bp.rsize / (sfs.f_bsize + 1)) >= sfs.f_bfree) {
Syslog('!', "Binkp: only %lu blocks free (need %lu) in %s for this file", sfs.f_bfree,
(unsigned long)(bp.rsize / (sfs.f_bsize + 1)), tempinbound);
closefile();
bp.rxfp = NULL; /* Force SKIP command */
}
}
if (bp.rsize == bp.rxbytes) {
/*
* We already got this file, send GOT so it will
* be deleted at the remote.
*/
Syslog('+', "Binkp: already got %s, sending GOT", bp.rname);
rc = binkp_send_command(MM_GOT, "%s %ld %ld", bp.rname, bp.rsize, bp.rtime);
bp.RxState = RxWaitF;
bp.rxfp = NULL;
if (rc)
return Failure;
else
return Ok;
} else if (!bp.rxfp) {
/*
* Some error, request to skip it
*/
Syslog('+', "Binkp: error file %s, sending SKIP", bp.rname);
rc = binkp_send_command(MM_SKIP, "%s %ld %ld", bp.rname, bp.rsize, bp.rtime);
bp.RxState = RxWaitF;
if (rc)
return Failure;
else
return Ok;
} else {
Syslog('b', "rsize=%d, rxbytes=%d, roffs=%d", bp.rsize, bp.rxbytes, bp.roffs);
bp.RxState = RxReceD;
return Ok;
}
} else if (bp.RxState == RxReceD) {
if (! bp.GotFrame)
return Ok;
if (! bp.cmd) {
bp.RxState = RxWriteD;
return Continue;
}
bp.GotFrame = FALSE;
bp.rxlen = 0;
bp.header = 0;
bp.blklen = 0;
bcmd = bp.rxbuf[0];
if (bcmd == MM_ERR) {
Syslog('+', "Binkp: got M_ERR \"%s\"", printable(bp.rxbuf +1, 0));
bp.RxState = RxDone;
return Failure;
} else if ((bcmd == MM_GET) || (bcmd == MM_GOT) || (bcmd == MM_SKIP)) {
binkp_add_message(bp.rxbuf);
return Ok;
} else if (bcmd == MM_NUL) {
parse_m_nul(bp.rxbuf +1);
return Ok;
} else if (bcmd == MM_FILE) {
Syslog('+', "Binkp: partial received file, saving");
closefile();
bp.rxfp = NULL;
bp.RxState = RxAccF;
return Continue;
} else if (bcmd <= MM_MAX) {
Syslog('+', "Binkp: ERROR got unexpected %s frame in %s state", bstate[bcmd], rxstate[bp.RxState]);
bp.RxState = RxDone;
return Failure;
} else {
Syslog('+', "Binkp: got unexpected unknown frame, ignore");
return Ok;
}
} else if (bp.RxState == RxWriteD) {
if (bp.rxfp == NULL) {
/*
* After sending M_GET for restart at offset, the file is closed
* but some data frames may be underway, so ignore these.
*/
Syslog('b', "Binkp: file is closed, ignore data");
bp.GotFrame = FALSE;
bp.rxlen = 0;
bp.header = 0;
bp.RxState = RxReceD;
return Ok;
}
written = fwrite(bp.rxbuf, 1, bp.blklen, bp.rxfp);
bp.GotFrame = FALSE;
bp.rxlen = 0;
bp.header = 0;
if (bp.blklen && (bp.blklen != written)) {
Syslog('+', "Binkp: ERROR file write error");
bp.RxState = RxDone;
bp.blklen = 0;
return Failure;
}
bp.blklen = 0;
bp.rxpos += written;
if (bp.rxpos == bp.rsize) {
rc = binkp_send_command(MM_GOT, "%s %ld %ld", bp.rname, bp.rsize, bp.rtime);
closefile();
bp.rxpos = bp.rxpos - bp.rxbytes;
gettimeofday(&rxtvend, &bp.tz);
#ifdef HAVE_ZLIB_H
if (bp.rxcompressed && (bp.PLZflag == Active))
Syslog('+', "Binkp: %s", compress_stat(bp.rxpos, bp.rxcompressed));
#endif
Syslog('+', "Binkp: OK %s", transfertime(rxtvstart, rxtvend, bp.rxpos, FALSE));
rcvdbytes += bp.rxpos;
bp.RxState = RxWaitF;
if (rc)
return Failure;
else
return Ok;
}
bp.RxState = RxReceD;
return Ok;
} else if (bp.RxState == RxEOB) {
if (! bp.GotFrame)
return Ok;
bp.GotFrame = FALSE;
bp.rxlen = 0;
bp.header = 0;
bp.blklen = 0;
if (bp.cmd) {
bcmd = bp.rxbuf[0];
if (bcmd == MM_ERR) {
Syslog('+', "Binkp: got M_ERR \"%s\"", printable(bp.rxbuf +1, 0));
bp.RxState = RxDone;
return Failure;
} else if ((bcmd == MM_GET) || (bcmd == MM_GOT) || (bcmd == MM_SKIP)) {
binkp_add_message(bp.rxbuf);
return Ok;
} else if (bcmd == MM_NUL) {
parse_m_nul(bp.rxbuf +1);
return Ok;
} else if (bcmd <= MM_MAX) {
Syslog('+', "Binkp: ERROR got unexpected %s frame in %s state", bstate[bcmd], rxstate[bp.RxState]);
bp.RxState = RxDone;
return Failure;
} else {
Syslog('+', "Binkp: got unexpected unknown frame, ignore");
return Ok;
}
} else {
Syslog('+', "Binkp: ERROR got unexpected data frame in %s state", rxstate[bp.RxState]);
bp.RxState = RxDone;
return Failure;
}
} else if (bp.RxState == RxDone) {
return Ok;
}
/*
* Cannot be here
*/
bp.RxState = RxDone;
return Failure;
}
/************************************************************************************/
/*
* Transmitter routine
*/
TrType binkp_transmitter(void)
{
int rc = 0, eof = FALSE;
char *nonhold_mail;
fa_list *eff_remote;
file_list *tsl;
static binkp_list *tmp;
if (bp.TxState == TxGNF) {
/*
* If we do not have a filelist yet, create one.
*/
if (tosend == NULL) {
Syslog('b', "Creating filelist");
nonhold_mail = (char *)ALL_MAIL;
bp.nethold = bp.mailhold = 0L;
cursend = NULL;
/*
* If remote doesn't have the 8.3 flag set, allow long names
*/
if (!nodes.FNC)
remote_flags &= ~SESSION_FNC;
eff_remote = remote;
tosend = create_filelist(eff_remote, nonhold_mail, 0);
if ((respond = respond_wazoo()) != NULL) {
for (tsl = tosend; tsl->next; tsl = tsl ->next);
tsl->next = respond;
Syslog('b', "Binkp: added requested files");
}
/*
* Build a new filelist from the existing filelist.
* This one is special for binkp behaviour.
*/
for (tsl = tosend; tsl; tsl = tsl->next) {
if (tsl->remote != NULL)
fill_binkp_list(&bll, tsl, 0L);
}
if ((bp.nethold || bp.mailhold) || (bp.batchnr == 0)) {
Syslog('+', "Binkp: mail %ld, files %ld bytes", bp.nethold, bp.mailhold);
if ((rc = binkp_send_command(MM_NUL, "TRF %ld %ld", bp.nethold, bp.mailhold))) {
bp.TxState = TxDone;
return Failure;
}
}
}
for (tmp = bll; tmp; tmp = tmp->next) {
if (tmp->state == NoState) {
/*
* There is something to send
*/
struct flock txflock;
txflock.l_type = F_RDLCK;
txflock.l_whence = 0;
txflock.l_start = 0L;
txflock.l_len = 0L;
bp.txfp = fopen(tmp->local, "r");
if (bp.txfp == NULL) {
if ((errno == ENOENT) || (errno == EINVAL)) {
Syslog('+', "Binkp: file %s doesn't exist, removing", MBSE_SS(tmp->local));
tmp->state = Got;
} else {
WriteError("$Binkp: can't open %s, skipping", MBSE_SS(tmp->local));
tmp->state = Skipped;
}
break;
}
if (fcntl(fileno(bp.txfp), F_SETLK, &txflock) != 0) {
WriteError("$Binkp: can't lock file %s, skipping", MBSE_SS(tmp->local));
fclose(bp.txfp);
bp.txfp = NULL;
tmp->state = Skipped;
break;
}
bp.txpos = bp.stxpos = tmp->offset;
bp.txcompressed = 0;
Syslog('+', "Binkp: send \"%s\" as \"%s\"", MBSE_SS(tmp->local), MBSE_SS(tmp->remote));
Syslog('+', "Binkp: size %lu bytes, dated %s", (unsigned long)tmp->size, date(tmp->date));
rc = binkp_send_command(MM_FILE, "%s %lu %ld %ld", MBSE_SS(tmp->remote),
(unsigned long)tmp->size, (long)tmp->date, (unsigned long)tmp->offset);
if (rc) {
bp.TxState = TxDone;
return Failure;
}
gettimeofday(&txtvstart, &bp.tz);
tmp->state = Sending;
cursend = tmp;
bp.TxState = TxTryR;
return Continue;
} /* if state == NoState */
} /* for */
if (tmp == NULL) {
/*
* No more files
*/
rc = binkp_send_command(MM_EOB, "");
bp.TxState = TxWLA;
if (rc)
return Failure;
else
return Continue;
}
return Ok;
} else if (bp.TxState == TxTryR) {
if (bp.msgs_on_queue == 0) {
bp.TxState = TxReadS;
return Continue;
} else {
if (binkp_process_messages()) {
bp.TxState = TxDone;
return Failure;
} else
return Continue;
}
} else if (bp.TxState == TxReadS) {
fseek(bp.txfp, bp.txpos, SEEK_SET);
bp.txlen = fread(bp.txbuf, 1, bp.cmpblksize, bp.txfp);
eof = feof(bp.txfp);
if ((bp.txlen == 0) || eof) {
/*
* Nothing read/error or we are at eof
*/
if (ferror(bp.txfp)) {
WriteError("$Binkp: error reading from file");
bp.TxState = TxDone;
cursend->state = Skipped;
return Failure;
}
/*
* We are at eof, send last datablock
*/
if (eof && bp.txlen) {
bp.txpos += bp.txlen;
sentbytes += bp.txlen;
rc = binkp_send_frame(FALSE, bp.txbuf, bp.txlen);
if (rc)
return Failure;
}
/*
* calculate time needed and bytes transferred
*/
gettimeofday(&txtvend, &bp.tz);
/*
* Close transmitter file
*/
fclose(bp.txfp);
bp.txfp = NULL;
if (bp.txpos >= 0) {
bp.stxpos = bp.txpos - bp.stxpos;
#ifdef HAVE_ZLIB_H
if (bp.txcompressed && (bp.PLZflag == Active))
Syslog('+', "Binkp: %s", compress_stat(bp.stxpos, bp.txcompressed));
#endif
Syslog('+', "Binkp: OK %s", transfertime(txtvstart, txtvend, bp.stxpos, TRUE));
} else {
Syslog('+', "Binkp: transmitter skipped file after %ld seconds", txtvend.tv_sec - txtvstart.tv_sec);
}
cursend->state = IsSent;
cursend = NULL;
bp.TxState = TxGNF;
return Ok;
} else {
/*
* regular datablock
*/
bp.txpos += bp.txlen;
sentbytes += bp.txlen;
rc = binkp_send_frame(FALSE, bp.txbuf, bp.txlen);
bp.TxState = TxTryR;
if (rc)
return Failure;
else
return Ok;
}
} else if (bp.TxState == TxWLA) {
if ((bp.msgs_on_queue == 0) && (binkp_pendingfiles() == 0)) {
if ((bp.RxState >= RxEOB) && (bp.Major == 1) && (bp.Minor == 0)) {
bp.TxState = TxDone;
if (bp.local_EOB && bp.remote_EOB) {
Syslog('b', "Binkp: binkp/1.0 session seems complete");
bp.RxState = RxDone;
}
binkp_clear_filelist(rc);
return Ok;
}
if ((bp.RxState < RxEOB) && (bp.Major == 1) && (bp.Minor == 0)) {
bp.TxState = TxWLA;
return Ok;
}
if ((bp.Major == 1) && (bp.Minor != 0)) {
if (bp.local_EOB && bp.remote_EOB) {
/*
* We did send EOB and got a EOB
*/
if (bp.messages < 3) {
/*
* Nothing sent anymore, finish
*/
Syslog('b', "Binkp: binkp/1.1 session seems complete");
bp.RxState = RxDone;
bp.TxState = TxDone;
} else {
/*
* Start new batch
*/
bp.batchnr++;
bp.local_EOB = FALSE;
bp.remote_EOB = FALSE;
bp.messages = 0;
bp.TxState = TxGNF;
bp.RxState = RxWaitF;
Syslog('+', "Binkp: transmitter starts batch %d", bp.batchnr + 1);
binkp_clear_filelist(rc);
return Ok; /* Continue is not good here, troubles with binkd on slow links. */
}
}
binkp_clear_filelist(rc);
return Ok;
}
}
if (bp.msgs_on_queue) {
if (binkp_process_messages()) {
return Failure;
} else {
return Continue;
}
}
return Ok;
} else if (bp.TxState == TxDone) {
return Ok;
}
/*
* Cannot be here
*/
bp.TxState = TxDone;
return Failure;
}
/************************************************************************************/
/*
* Functions
*/
/*
* Send a binkp frame
*/
int binkp_send_frame(int cmd, char *buf, int len)
{
unsigned short header = 0;
int rc, id;
#ifdef HAVE_ZLIB_H
int rcz, last;
unsigned long zlen;
char *zbuf;
if ((len >= BINKP_PLZ_BLOCK) && (bp.PLZflag == Active)) {
WriteError("Can't send block of %d bytes in PLZ mode", len);
return 1;
}
#endif
if (cmd) {
header = ((BINKP_CONTROL_BLOCK + len) & 0xffff);
bp.messages++;
id = buf[0];
if (id == MM_EOB) {
bp.local_EOB = TRUE;
}
if (len == 1)
Syslog('b', "Binkp: send %s", bstate[id]);
else
Syslog('b', "Binkp: send %s %s", bstate[id], printable(buf +1, len -1));
} else {
header = ((BINKP_DATA_BLOCK + len) & 0xffff);
Syslog('b', "Binkp: send data (%d)", len);
}
#ifdef HAVE_ZLIB_H
last = bp.cmpblksize;
/*
* Only use compression for DATA blocks larger then 20 bytes.
*/
if ((bp.PLZflag == Active) && (len > 20) && (!cmd)) {
zbuf = calloc(BINKP_ZIPBUFLEN, sizeof(char));
zlen = BINKP_PLZ_BLOCK -1;
rcz = compress2(zbuf, &zlen, buf, len, 9);
if (rcz == Z_OK) {
Syslog('b', "Binkp: compressed OK, srclen=%d, destlen=%d, will send compressed=%s",
len, zlen, (zlen < len) ?"yes":"no");
if (zlen < len) {
bp.txcompressed += (len - zlen);
/*
* Calculate the perfect blocksize for the next block
* using the current compression ratio. This gives
* a dynamic optimal blocksize. The average maximum
* blocksize on the line will be 4096 bytes.
*/
bp.cmpblksize = ((len * 4) / zlen) * 512;
if (bp.cmpblksize < SND_BLKSIZE)
bp.cmpblksize = SND_BLKSIZE;
if (bp.cmpblksize > (BINKP_PLZ_BLOCK -1))
bp.cmpblksize = (BINKP_PLZ_BLOCK -1);
/*
* Rebuild header for compressed block
*/
header = ((BINKP_DATA_BLOCK + BINKP_PLZ_BLOCK + zlen) & 0xffff);
rc = PUTCHAR((header >> 8) & 0x00ff);
if (!rc)
rc = PUTCHAR(header & 0x00ff);
if (zlen && !rc)
rc = PUT(zbuf, zlen);
} else {
rc = PUTCHAR((header >> 8) & 0x00ff);
if (!rc)
rc = PUTCHAR(header & 0x00ff);
if (len && !rc)
rc = PUT(buf, len);
if (!cmd)
bp.cmpblksize = SND_BLKSIZE;
}
} else {
Syslog('+', "Binkp: compress error %d", rcz);
rc = PUTCHAR((header >> 8) & 0x00ff);
if (!rc)
rc = PUTCHAR(header & 0x00ff);
if (len && !rc)
rc = PUT(buf, len);
if (!cmd)
bp.cmpblksize = SND_BLKSIZE;
}
free(zbuf);
} else {
rc = PUTCHAR((header >> 8) & 0x00ff);
if (!rc)
rc = PUTCHAR(header & 0x00ff);
if (len && !rc)
rc = PUT(buf, len);
if (!cmd)
bp.cmpblksize = SND_BLKSIZE;
}
#else
rc = PUTCHAR((header >> 8) & 0x00ff);
if (!rc)
rc = PUTCHAR(header & 0x00ff);
if (len && !rc)
rc = PUT(buf, len);
bp.cmpblksize = SND_BLKSIZE;
#endif
FLUSHOUT();
binkp_settimer(BINKP_TIMEOUT);
Nopper();
return rc;
}
/*
* Send a command message
*/
int binkp_send_command(int id, ...)
{
va_list args;
char *fmt;
static char buf[1024];
int sz, rc;
va_start(args, id);
fmt = va_arg(args, char*);
if (fmt) {
vsprintf(buf, fmt, args);
sz = (strlen(buf) & 0x7fff);
} else {
buf[0]='\0';
sz = 0;
}
memmove(buf+1, buf, sz);
buf[0] = id & 0xff;
sz++;
rc = binkp_send_frame(TRUE, buf, sz);
va_end(args);
return rc;
}
/*
* Set binkp master timer
*/
void binkp_settimer(int interval)
{
Timer = time((time_t*)NULL) + interval;
}
/*
* Test if master timer is expired
*/
int binkp_expired(void)
{
time_t now;
now = time(NULL);
if (now >= Timer)
Syslog('+', "Binkp: session timeout");
return (now >= Timer);
}
/*
* Send system info to remote
*/
int binkp_banner(void)
{
time_t t;
int rc;
rc = binkp_send_command(MM_NUL,"SYS %s", CFG.bbs_name);
if (!rc)
rc = binkp_send_command(MM_NUL,"ZYZ %s", CFG.sysop_name);
if (!rc)
rc = binkp_send_command(MM_NUL,"LOC %s", CFG.location);
if (!rc)
rc = binkp_send_command(MM_NUL,"NDL %s", CFG.IP_Flags);
t = time(NULL);
if (!rc)
rc = binkp_send_command(MM_NUL,"TIME %s", rfcdate(t));
if (!rc) {
if (nodes.NoBinkp11 || bp.buggyIrex)
rc = binkp_send_command(MM_NUL,"VER mbcico/%s/%s-%s %s/%s", VERSION, OsName(), OsCPU(), PRTCLNAME, PRTCLOLD);
else
rc = binkp_send_command(MM_NUL,"VER mbcico/%s/%s-%s %s/%s", VERSION, OsName(), OsCPU(), PRTCLNAME, PRTCLVER);
}
if (strlen(CFG.IP_Phone) && !rc)
rc = binkp_send_command(MM_NUL,"PHN %s", CFG.IP_Phone);
if (strlen(CFG.comment) && !rc)
rc = binkp_send_command(MM_NUL,"OPM %s", CFG.comment);
return rc;
}
/*
* Receive command frame
*/
int binkp_recv_command(char *buf, unsigned long *len, int *cmd)
{
int b0, b1;
*len = *cmd = 0;
b0 = GETCHAR(BINKP_TIMEOUT);
if (tty_status) {
Syslog('-', "Binkp: tty_status with b0");
goto to;
}
if (b0 & 0x80)
*cmd = 1;
b1 = GETCHAR(BINKP_TIMEOUT / 2);
if (tty_status) {
Syslog('-', "Binkp: tty_status with b1");
goto to;
}
*len = (b0 & 0x7f) << 8;
*len += b1;
GET(buf, *len, BINKP_TIMEOUT / 2);
buf[*len] = '\0';
if (tty_status) {
Syslog('-', "Binkp: tty_status with block len=%d", *len);
goto to;
}
binkp_settimer(BINKP_TIMEOUT);
Nopper();
to:
if (tty_status)
WriteError("Binkp: TCP rcv error, tty status: %s", ttystat[tty_status]);
return tty_status;
}
/*
* Parse a received M_NUL message
*/
void parse_m_nul(char *msg)
{
char *p, *q;
if (strncmp(msg, "SYS ", 4) == 0) {
Syslog('+', "System : %s", msg+4);
strncpy(history.system_name, msg+4, 35);
} else if (strncmp(msg, "ZYZ ", 4) == 0) {
Syslog('+', "Sysop : %s", msg+4);
strncpy(history.sysop, msg+4, 35);
} else if (strncmp(msg, "LOC ", 4) == 0) {
Syslog('+', "Location: %s", msg+4);
strncpy(history.location, msg+4, 35);
} else if (strncmp(msg, "NDL ", 4) == 0) {
Syslog('+', "Flags : %s", msg+4);
} else if (strncmp(msg, "TIME ", 5) == 0) {
Syslog('+', "Time : %s", msg+5);
} else if (strncmp(msg, "VER ", 4) == 0) {
Syslog('+', "Uses : %s", msg+4);
if ((p = strstr(msg+4, PRTCLNAME "/")) && (q = strstr(p, "."))) {
bp.Major = atoi(p + 6);
bp.Minor = atoi(q + 1);
}
/*
* Irex 2.24 upto 2.29 claims binkp/1.1 while it is binkp/1.0
* Set a flag so we can activate a workaround. This only works
* for incoming sessions.
*/
if ((p = strstr(msg+4, "Internet Rex 2."))) {
q = strtok(p + 15, (char *)" \0");
if ((atoi(q) >= 24) && (atoi(q) <= 29)) {
Syslog('b', " : Irex bug detected, workaround activated");
bp.buggyIrex = TRUE;
}
}
} else if (strncmp(msg, "PHN ", 4) == 0) {
Syslog('+', "Phone : %s", msg+4);
} else if (strncmp(msg, "OPM ", 4) == 0) {
Syslog('+', "Remark : %s", msg+4);
} else if (strncmp(msg, "TRF ", 4) == 0) {
Syslog('+', "Binkp: remote has %s mail/files for us", msg+4);
} else if (strncmp(msg, "OPT ", 4) == 0) {
Syslog('+', "Options : %s", msg+4);
p = msg;
q = strtok(p, " \n\r\0");
while ((q = strtok(NULL, " \r\n\0"))) {
if (strncmp(q, (char *)"CRAM-MD5-", 9) == 0) { /* No SHA-1 support */
if (CFG.NoMD5) {
Syslog('+', "Binkp: Remote supports MD5, but it's turned off here");
} else {
if (bp.MD_Challenge)
free(bp.MD_Challenge);
bp.MD_Challenge = MD_getChallenge(q, NULL);
}
#ifdef HAVE_ZLIB_H
} else if (strncmp(q, (char *)"PLZ", 3) == 0) {
if (bp.PLZflag == WeCan) {
bp.PLZflag = TheyWant;
binkp_send_command(MM_NUL,"OPT PLZ");
bp.PLZflag = Active;
Syslog('+', " : zlib compression active");
} else if (bp.PLZflag == WeWant) {
bp.PLZflag = Active;
Syslog('+', " : zlib compression active");
} else {
Syslog('b', "PLZflag is %s and received PLZ option", opstate[bp.PLZflag]);
}
#endif
// } else {
// Syslog('b', "Binkp: opt not supported");
}
}
} else {
Syslog('+', "Binkp: M_NUL \"%s\"", msg);
}
}
/*
* Poll for a frame, returns:
* -1 = Error
* 0 = Nothing yet
* 1 = Got a frame
* 2 = Frame not processed
* 3 = Uncompress error
*/
int binkp_poll_frame(void)
{
int c, rc = 0, bcmd;
#ifdef HAVE_ZLIB_H
unsigned long zlen;
char *zbuf;
#endif
for (;;) {
if (bp.GotFrame) {
Syslog('b', "Binkp: WARNING: frame not processed");
rc = 2;
break;
} else {
c = GETCHAR(0);
if (c < 0) {
c = -c;
if (c == STAT_TIMEOUT) {
msleep(1);
rc = 0;
break;
}
Syslog('?', "Binkp: receiver status %s", ttystat[c]);
bp.rc = (MBERR_TTYIO + (-c));
rc = -1;
break;
} else {
switch (bp.rxlen) {
case 0: bp.header = c << 8;
rc = 0;
break;
case 1: bp.header += c;
rc = 0;
break;
default:bp.rxbuf[bp.rxlen-2] = c;
}
if (bp.rxlen == 1) {
bp.cmd = bp.header & BINKP_CONTROL_BLOCK;
#ifdef HAVE_ZLIB_H
if (bp.PLZflag == Active) {
bp.blklen = bp.header & 0x3fff;
} else {
bp.blklen = bp.header & 0x7fff;
}
#else
bp.blklen = bp.header & 0x7fff;
#endif
}
if ((bp.rxlen == (bp.blklen + 1) && (bp.rxlen >= 1))) {
bp.GotFrame = TRUE;
#ifdef HAVE_ZLIB_H
if ((bp.PLZflag == Active) && (bp.header & BINKP_PLZ_BLOCK) && bp.blklen) {
zbuf = calloc(BINKP_ZIPBUFLEN, sizeof(char));
zlen = BINKP_PLZ_BLOCK -1;
rc = uncompress(zbuf, &zlen, bp.rxbuf, bp.rxlen -1);
if (rc == Z_OK) {
bp.rxcompressed += (zlen - (bp.rxlen -1));
memmove(bp.rxbuf, zbuf, zlen);
bp.rxlen = zlen +1;
bp.blklen = zlen;
} else {
free(zbuf);
Syslog('!', "Binkp: uncompress error %d", rc);
return 3;
}
free(zbuf);
}
#endif
bp.rxbuf[bp.rxlen-1] = '\0';
if (bp.cmd) {
bp.messages++;
bcmd = bp.rxbuf[0];
Syslog('b', "Binkp: rcvd %s %s", bstate[bcmd], printable(bp.rxbuf+1, 0));
if (bcmd == MM_EOB) {
bp.remote_EOB = TRUE;
}
} else {
Syslog('b', "Binkp: rcvd data (%d)", bp.rxlen -1);
}
binkp_settimer(BINKP_TIMEOUT);
Nopper();
rc = 1;
break;
}
bp.rxlen++;
}
}
}
return rc;
}
/*
* Add received command frame to the queue, will be processed by the transmitter.
*/
void binkp_add_message(char *frame)
{
the_queue **tmpl;
int bcmd;
bcmd = frame[0];
Syslog('b', "Binkp: add message %s %s", bstate[bcmd], printable(frame +1, 0));
for (tmpl = &tql; *tmpl; tmpl = &((*tmpl)->next));
*tmpl = (the_queue *)malloc(sizeof(the_queue));
(*tmpl)->next = NULL;
(*tmpl)->cmd = frame[0];
(*tmpl)->data = xstrcpy(frame +1);
bp.msgs_on_queue++;
}
/*
* Process all messages on the queue, the oldest are on top, after
* processing release memory and reset the messages queue.
*/
int binkp_process_messages(void)
{
the_queue *tmpq, *oldq;
binkp_list *tmp;
file_list *tsl;
int Found;
char *lname;
time_t ltime;
long lsize, loffs;
Syslog('b', "Binkp: Process The Messages Queue Start");
lname = calloc(512, sizeof(char));
for (tmpq = tql; tmpq; tmpq = tmpq->next) {
Syslog('+', "Binkp: %s \"%s\"", bstate[tmpq->cmd], printable(tmpq->data, 0));
if (tmpq->cmd == MM_GET) {
sprintf(lname, "%s", strtok(tmpq->data, " \n\r"));
lsize = atoi(strtok(NULL, " \n\r"));
ltime = atoi(strtok(NULL, " \n\r"));
loffs = atoi(strtok(NULL, " \n\r"));
Found = FALSE;
for (tmp = bll; tmp; tmp = tmp->next) {
if ((strcmp(lname, tmp->remote) == 0) && (lsize == tmp->size) && (ltime == tmp->date)) {
if (lsize == loffs) {
/*
* Requested offset is filesize, close file.
*/
if (cursend && (strcmp(lname, cursend->remote) == 0) &&
(lsize == cursend->size) && (ltime == cursend->date)) {
Syslog('b', "Got M_GET with offset == filesize for current file, close");
/*
* calculate time needed and bytes transferred
*/
gettimeofday(&txtvend, &bp.tz);
/*
* Close transmitter file
*/
fclose(bp.txfp);
bp.txfp = NULL;
if (bp.txpos >= 0) {
bp.stxpos = bp.txpos - bp.stxpos;
Syslog('+', "Binkp: OK %s", transfertime(txtvstart, txtvend, bp.stxpos, TRUE));
} else {
Syslog('+', "Binkp: transmitter skipped file after %ld seconds",
txtvend.tv_sec - txtvstart.tv_sec);
}
cursend->state = Got; // 12-03-2004 changed from IsSent, bug from LdG with FT.
cursend = NULL;
bp.TxState = TxGNF;
for (tsl = tosend; tsl; tsl = tsl->next) { // Added 12-03
if (tsl->remote == NULL) {
execute_disposition(tsl);
} else {
if (strcmp(cursend->local, tsl->local) == 0) {
execute_disposition(tsl);
}
}
}
} else {
Syslog('+', "Binkp: requested offset = filesize, but is not the current file");
if (tmp->state == IsSent) { // Added 12-03
Syslog('b', "Binkp: file is sent, treat as m_got");
tmp->state = Got;
for (tsl = tosend; tsl; tsl = tsl->next) {
if (tsl->remote == NULL) {
execute_disposition(tsl);
} else {
if (strcmp(tmp->local, tsl->local) == 0) {
execute_disposition(tsl);
}
}
}
}
}
} else if (loffs < lsize) {
tmp->state = NoState;
tmp->offset = loffs;
if (loffs) {
Syslog('+', "Binkp: Remote wants %s for resync at offset %ld", tmp->remote, tmp->offset);
} else {
Syslog('+', "Binkp: Remote wants %s again from start", tmp->remote);
}
bp.TxState = TxGNF;
} else {
Syslog('+', "Binkp: requested offset > filesize, ignore");
}
Found = TRUE;
break;
}
if (!Found) {
Syslog('+', "Binkp: unexpected M_GET \"%s\"", tmpq->data); /* Ignore frame */
}
}
} else if (tmpq->cmd == MM_GOT) {
sprintf(lname, "%s", strtok(tmpq->data, " \n\r"));
lsize = atoi(strtok(NULL, " \n\r"));
ltime = atoi(strtok(NULL, " \n\r"));
Found = FALSE;
for (tmp = bll; tmp; tmp = tmp->next) {
if ((strcmp(lname, tmp->remote) == 0) && (lsize == tmp->size) && (ltime == tmp->date)) {
Found = TRUE;
if (tmp->state == Sending) {
Syslog('+', "Binkp: remote refused %s", tmp->remote);
fclose(bp.txfp);
bp.txfp = NULL;
bp.TxState = TxGNF;
cursend = NULL;
} else {
Syslog('+', "Binkp: remote GOT \"%s\"", tmp->remote);
}
tmp->state = Got;
for (tsl = tosend; tsl; tsl = tsl->next) {
if (tsl->remote == NULL) {
execute_disposition(tsl);
} else {
if (strcmp(tmp->local, tsl->local) == 0) {
execute_disposition(tsl);
}
}
}
break;
}
}
if (!Found) {
Syslog('+', "Binkp: unexpected M_GOT \"%s\"", tmpq->data); /* Ignore frame */
}
} else if (tmpq->cmd == MM_SKIP) {
sprintf(lname, "%s", strtok(tmpq->data, " \n\r"));
lsize = atoi(strtok(NULL, " \n\r"));
ltime = atoi(strtok(NULL, " \n\r"));
Found = FALSE;
for (tmp = bll; tmp; tmp = tmp->next) {
if ((strcmp(lname, tmp->remote) == 0) && (lsize == tmp->size) && (ltime == tmp->date)) {
Found = TRUE;
if (tmp->state == Sending) {
Syslog('+', "Binkp: remote skipped %s, may be accepted later", tmp->remote);
fclose(bp.txfp);
bp.txfp = NULL;
cursend = NULL;
bp.TxState = TxGNF;
} else {
Syslog('+', "Binkp: remote refused %s", tmp->remote);
}
tmp->state = Skipped;
break;
}
}
if (!Found) {
Syslog('+', "Binkp: unexpected M_SKIP \"%s\"", tmpq->data); /* Ignore frame */
}
} else {
/* Illegal message on the queue */
}
}
/*
* Tidy the messages queue and reset.
*/
for (tmpq = tql; tmpq; tmpq = oldq) {
oldq = tmpq->next;
if (tmpq->data)
free(tmpq->data);
free(tmpq);
}
tql = NULL;
free(lname);
bp.msgs_on_queue = 0;
Syslog('b', "Binkp: Process The Messages Queue End");
return 0;
}
/*
* Count number of pending files
*/
int binkp_pendingfiles(void)
{
binkp_list *tmpl;
int count = 0;
for (tmpl = bll; tmpl; tmpl = tmpl->next) {
if ((tmpl->state != Got) && (tmpl->state != Skipped))
count++;
}
if (count)
Syslog('b', "Binkp: %d pending files on queue", count);
return count;
}
/*
* This function is called two times if a partial file exists from openfile.
* 1. A partial file is detected, send a GET to the remote, set DidSendGET flag.
* 2. DidSendGET is set, return 0 and let openfile open the file in append mode.
*/
int binkp_resync(off_t off)
{
Syslog('b', "Binkp: resync(%d) DidSendGET=%s", off, bp.DidSendGET ?"TRUE":"FALSE");
if (!bp.DidSendGET) {
binkp_send_command(MM_GET, "%s %ld %ld %ld", bp.rname, bp.rsize, bp.rtime, off);
bp.DidSendGET = TRUE;
Syslog('+', "Binkp: already %lu bytes received, requested restart with offset", (unsigned long)off);
return -1; /* Signal openfile not to open the file */
}
bp.DidSendGET = FALSE;
return 0; /* Signal openfile to open the file in append mode */
}
/*
* Translate string to binkp escaped string, unsafe characters are escaped.
*/
char *unix2binkp(char *fn)
{
static char buf[PATH_MAX];
char *p, *q;
memset(&buf, 0, sizeof(buf));
p = fn;
q = buf;
while (*p) {
if (strspn(p, (char *)BNKCHARS)) {
*q++ = *p;
*q = '\0';
} else {
if (nodes.WrongEscape) {
sprintf(q, "\\%2x", p[0]);
} else {
sprintf(q, "\\x%2x", p[0]);
}
}
while (*q)
q++;
p++;
}
*q = '\0';
return buf;
}
/*
* Translate escaped binkp string to normal string.
*/
char *binkp2unix(char *fn)
{
static char buf[PATH_MAX];
char *p, *q, hex[3];
int c;
memset(&buf, 0, sizeof(buf));
p = fn;
q = buf;
while (*p) {
if (p[0] == '\\') {
p++;
if (*p == '\\') {
/*
* A backslash is transmitted
*/
*q++ = '\\';
*q = '\0';
} else {
/*
* If remote sends \x0a method instead of \0a, eat the x character.
* Remotes should send the x character, But some (Argus and Irex) don't.
*/
if ((*p == 'x') || (*p == 'X'))
p++;
/*
* Decode hex characters
*/
hex[0] = *p++;
hex[1] = *p;
hex[2] = '\0';
sscanf(hex, "%2x", &c);
*q++ = c;
*q = '\0';
}
} else {
*q++ = *p;
*q = '\0';
}
p++;
}
*q = '\0';
return buf;
}
/*
* Fill internal binkp filelist
*/
void fill_binkp_list(binkp_list **bkll, file_list *fal, off_t offs)
{
binkp_list **tmpl;
FILE *fp;
struct stat tstat;
for (tmpl = bkll; *tmpl; tmpl = &((*tmpl)->next));
*tmpl = (binkp_list *)malloc(sizeof(binkp_list));
(*tmpl)->next = NULL;
(*tmpl)->state = NoState;
if ((fp = fopen(fal->local, "r")) == NULL) {
if ((errno == ENOENT) || (errno == EINVAL)) {
Syslog('+', "Binkp: file %s doesn't exist, removing", MBSE_SS(fal->local));
(*tmpl)->state = Got;
execute_disposition(fal);
}
} else {
fclose(fp);
stat(fal->local, &tstat);
if (strstr(fal->remote, (char *)".pkt"))
bp.nethold += tstat.st_size;
else
bp.mailhold += tstat.st_size;
}
(*tmpl)->get = FALSE;
(*tmpl)->local = xstrcpy(fal->local);
(*tmpl)->remote = xstrcpy(unix2binkp(fal->remote));
(*tmpl)->offset = offs;
(*tmpl)->size = tstat.st_size;
(*tmpl)->date = tstat.st_mtime;
}
/*
* Clear current filelist
*/
void binkp_clear_filelist(int rc)
{
binkp_list *tmp;
file_list *fal;
if (tosend != NULL) {
Syslog('b', "Binkp: binkp_clear_filelist(%d)", rc);
for (tmp = bll; bll; bll = tmp) {
tmp = bll->next;
if (bll->local)
free(bll->local);
if (bll->remote)
free(bll->remote);
free(bll);
}
/* WARNING: Added 16-07-2004 to see if this is safe to clean /flo files.
*
* Remove sent fake files like .spl and .flo
*/
for (fal = tosend; fal; fal = fal->next) {
if ((fal->remote == NULL) && (rc == 0))
execute_disposition(fal);
}
tidy_filelist(tosend, TRUE);
tosend = NULL;
respond = NULL;
}
}
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