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6e1d6ecc40
deb-mbse/mbcico/binkpnew.c
Michiel Broek 6e1d6ecc40 Added new binkp development
2003-12-27 16:51:42 +00:00

713 lines
18 KiB
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/*****************************************************************************
*
* $Id$
* Purpose .................: Fidonet binkp protocol
* Binkp protocol copyright : Dima Maloff.
*
*****************************************************************************
* Copyright (C) 1997-2003
*
* 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"
#ifdef USE_NEWBINKP
#include "../lib/libs.h"
#include "../lib/structs.h"
#include "../lib/users.h"
#include "../lib/records.h"
#include "../lib/common.h"
#include "../lib/nodelist.h"
#include "../lib/dbnode.h"
#include "../lib/clcomm.h"
#include "../lib/mberrors.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 "binkpnew.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 rbuf[MAX_BLKSIZE + 1];
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 {RxWaitFile, RxAcceptFile, RxReceData, RxWriteData, RxEndOfBatch, RxDone} RxType;
typedef enum {TxGetNextFile, TxTryRead, TxReadSend, TxWaitLastAck, TxDone} TxType;
typedef enum {InitTransfer, Switch, Receive, Transmit} TransferType;
typedef enum {Ok, Failure, Continue} TrType;
typedef enum {No, WeCan, WeWant, TheyWant, Active} OptionState;
static char *rxstate[] = { (char *)"RxWaitFile", (char *)"RxAccpetFile", (char *)"RxReceData",
(char *)"RxWriteData", (char *)"RxEndOfBatch", (char *)"RxDone" };
static char *txstate[] = { (char *)"TxGetNextFile", (char *)"TryRread", (char *)"ReadSent",
(char *)"WaitLastAck", (char *)"TxDone" };
//static char *tfstate[] = { (char *)"InitTransfer", (char *)"Switch", (char *)"Receive", (char *)"Transmit" };
//static char *trstate[] = { (char *)"Ok", (char *)"Failure", (char *)"Continue" };
static char *opstate[] = { (char *)"No", (char *)"WeCan", (char *)"WeWant", (char *)"TheyWant", (char *)"Active" };
//static int TfState;
static time_t Timer;
int transferred = FALSE; /* Anything transferred in batch */
int ext_rand = 0;
struct binkprec {
int Role; /* 1=orig, 0=answer */
int RxState; /* Receiver state */
int TxState; /* Transmitter 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 */
/* Receiver buffer */
char *rxbuf; /* Receiver buffer */
};
struct binkprec bp; /* Global structure */
/*
* Prototypes
*/
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 *, int *, int *); /* Receive command frame */
void parse_m_nul(char *); /* Parse M_NUL message */
static int orgbinkp(void); /* Originate session state */
/************************************************************************************/
/*
* General entry point
*/
int binkp(int role)
{
int rc = 0;
most_debug = TRUE;
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));
if (role == 1) {
if (orgbinkp()) {
rc = MBERR_SESSION_ERROR;
}
} else {
// if (ansbinkp()) {
// rc = MBERR_SESSION_ERROR;
// }
}
if (rc) {
Syslog('!', "Binkp: session failed");
goto binkperr;
}
binkperr:
/*
* Deinit
*/
if (bp.MD_Challenge)
free(bp.MD_Challenge);
if (bp.rxbuf)
free(bp.rxbuf);
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, bufl, cmd, dupe, SendPass = FALSE;
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 (Add PLZ etc).
*/
p = xstrcpy((char *)"OPT");
// if ((noderecord(remote->addr)) && nodes.CRC32 && (bp.CRCflag == WeCan)) {
// p = xstrcat(p, (char *)" CRC");
// bp.CRCflag = WeWant;
// Syslog('b', "CRCflag WeCan => WeWant");
// }
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;
}
}
for (tmpa = remote; tmpa; tmpa = tmpa->next) {
Syslog('+', "Address : %s", ascfnode(tmpa->addr, 0x1f));
if (nodelock(tmpa->addr, mypid)) {
binkp_send_command(MM_BSY, "Address %s locked", ascfnode(tmpa->addr, 0x1f));
SM_ERROR;
}
/*
* With the loaded flag we prevent removing the noderecord
* when the remote presents us an address we don't know about.
*/
if (!Loaded) {
if (noderecord(tmpa->addr))
Loaded = TRUE;
}
}
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", remote->addr->domain);
SM_PROCEED(SendPasswd)
} else if (bp.rxbuf[0] == MM_BSY) {
Syslog('!', "Binkp: M_BSY \"%s\"", printable(&rbuf[1], 0));
SM_ERROR;
} else if (bp.rxbuf[0] == MM_ERR) {
Syslog('!', "Binkp: M_ERR \"%s\"", printable(&rbuf[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)
/*
* Try to initiate the MB option if the remote is binkp/1.0
*/
// if ((bp.MBflag == WeCan) && (bp.Major == 1) && (bp.Minor == 0)) {
// bp.MBflag = WeWant;
// Syslog('b', "MBflag WeCan => WeWant");
// binkp_send_command(MM_NUL, "OPT MB");
// }
SM_SUCCESS;
SM_END
SM_RETURN
/************************************************************************************/
/*
* Answer Session Setup
*/
/************************************************************************************/
/*
* File Transfer State
*/
/************************************************************************************/
/*
* Functions
*/
int binkp_send_frame(int cmd, char *buf, int len)
{
unsigned short header = 0;
int rc;
if (cmd)
header = ((BINKP_CONTROL_BLOCK + len) & 0xffff);
else
header = ((BINKP_DATA_BLOCK + len) & 0xffff);
rc = PUTCHAR((header >> 8) & 0x00ff);
if (!rc)
rc = PUTCHAR(header & 0x00ff);
if (len && !rc)
rc = PUT(buf, len);
FLUSHOUT();
binkp_settimer(BINKP_TIMEOUT);
Syslog('b', "Binkp: send %s frame, len=%d rc=%d", cmd?"CMD":"DATA", len, rc);
return rc;
}
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;
}
Syslog('b', "Binkp: send %s %s", bstate[id], buf);
memmove(buf+1, buf, sz);
buf[0] = id & 0xff;
sz++;
rc = binkp_send_frame(TRUE, buf, sz);
va_end(args);
return rc;
}
void binkp_settimer(int interval)
{
Timer = time((time_t*)NULL) + interval;
}
int binkp_expired(void)
{
time_t now;
now = time(NULL);
if (now >= Timer)
Syslog('+', "Binkp: timeout");
return (now >= Timer);
}
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.Flags);
t = time(NULL);
if (!rc)
rc = binkp_send_command(MM_NUL,"TIME %s", rfcdate(t));
if (!rc)
rc = binkp_send_command(MM_NUL,"VER mbcico/%s/%s-%s %s/%s", VERSION, OsName(), OsCPU(), PRTCLNAME, PRTCLVER);
if (strlen(CFG.Phone) && !rc)
rc = binkp_send_command(MM_NUL,"PHN %s", CFG.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, int *len, int *cmd)
{
int b0, b1;
*len = *cmd = 0;
b0 = GETCHAR(BINKP_TIMEOUT);
if (tty_status)
goto to;
if (b0 & 0x80)
*cmd = 1;
b1 = GETCHAR(1);
if (tty_status)
goto to;
*len = (b0 & 0x7f) << 8;
*len += b1;
GET(buf, *len, BINKP_TIMEOUT / 2);
buf[*len] = '\0';
if (tty_status)
goto to;
to:
if (tty_status)
WriteError("Binkp: TCP receive error: %d %s", tty_status, 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);
Syslog('b', "Remote protocol version %d.%d", bp.Major, bp.Minor);
/*
* Disable MB if protocol > 1.0 and MB was not yet active.
*/
// if ((bp.MBflag != Active) && (((bp.Major * 10) + bp.Minor) > 10)) {
// Syslog('b', "MBflag %s => No", opstate[bp.MBflag]);
// bp.MBflag = No;
// }
}
} 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);
// if (strstr(msg, (char *)"MB") != NULL) {
// Syslog('b', "Remote requests MB, current state = %s", opstate[bp.MBflag]);
// if ((bp.MBflag == WeCan) && (bp.Major == 1) && (bp.Minor == 0)) { /* Answering session and do binkp/1.0 */
// bp.MBflag = TheyWant;
// Syslog('b', "MBflag WeCan => TheyWant");
// binkp_send_control(MM_NUL,"OPT MB");
// Syslog('b', "MBflag TheyWant => Active");
// bp.MBflag = Active;
// } else if ((bp.MBflag == WeWant) && (bp.Major == 1) && (bp.Minor == 0)) { /* Originating session and do binkp/1.0 */
// bp.MBflag = Active;
// Syslog('b', "MBflag WeWant => Active");
// } else {
// Syslog('b', "MBflag is %s and received MB option", opstate[bp.MBflag]);
//
// }
// }
if (strstr(msg, (char *)"CRAM-MD5-") != NULL) { /* 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(msg, NULL);
}
}
} else {
Syslog('+', "Binkp: M_NUL \"%s\"", msg);
}
}
#endif
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