/***************************************************************************** * * $Id$ * 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/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 "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 *txstate[] = { (char *)"TxGNF", (char *)"TxTryR", (char *)"TxReadS", (char *)"TxWLA", (char *)"TxDone" }; static char *trstate[] = { (char *)"Ok", (char *)"Failure", (char *)"Continue" }; static char *opstate[] = { (char *)"No", (char *)"WeCan", (char *)"WeWant", (char *)"TheyWant", (char *)"Active" }; static char *lbstate[] = { (char *)"None", (char *)"Sending", (char *)"IsSent", (char *)"Got", (char *)"Skipped", (char *)"Get"}; static char *ftstate[] = { (char *)"InitTransfer", (char *)"Switch", (char *)"Receive", (char *)"Transmit", (char *)"DeinitTransfer" }; 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 */ }; 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 */ void debug_binkp_list(binkp_list **); /* Debug pending files list */ int binkp_pendingfiles(void); /* Count pending files */ void binkp_clear_filelist(void); /* 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; #ifdef USE_NEWBINKP most_debug = TRUE; #endif 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 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.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; Syslog('b', "PLZflag WeCan => 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", remote->addr->domain); 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) /* * 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 */ 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; Syslog('b', "PLZflag WeCan => 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); //if (bp.MBflag == TheyWant) { // Syslog('b', "Binkp: remote supports MB"); // binkp_send_control(MM_NUL,"OPT MB"); // bp.MBflag = Active; //} 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(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; } Syslog('b', "We %s have a password", we_have_pwd ?"do":"don't"); 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) 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. * FIXME: Remove these messages!! */ int file_transfer(void) { int rc = 0; TrType Trc = Ok; for (;;) { Syslog('B', "Binkp: FileTransfer state %s", ftstate[bp.FtState]); 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 */ Syslog('b', "Binkp: NOTHING DONE"); msleep(1); break; case Receive: Trc = binkp_receiver(); if (Trc == Ok) { binkp_settimer(BINKP_TIMEOUT); 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) { binkp_settimer(BINKP_TIMEOUT); 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(); 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; Syslog('B', "Binkp: receiver state %s", rxstate[bp.RxState]); 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)) { // Syslog('B', "Binkp: 1.1 check local_EOB=%s remote_EOB=%s messages=%d", // bp.local_EOB?"True":"False", bp.remote_EOB?"True":"False", bp.messages); 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(); 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 (!diskfree(CFG.freespace)) { 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; Syslog('B', "Binkp: transmitter state %s", txstate[bp.TxState]); 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); } debug_binkp_list(&bll); 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; debug_binkp_list(&bll); 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(); return Ok; } if ((bp.RxState < RxEOB) && (bp.Major == 1) && (bp.Minor == 0)) { bp.TxState = TxWLA; return Ok; } if ((bp.Major == 1) && (bp.Minor != 0)) { // Syslog('B', "Binkp: 1.1 check local_EOB=%s remote_EOB=%s messages=%d", // bp.local_EOB?"True":"False", bp.remote_EOB?"True":"False", bp.messages); 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(); return Ok; /* Continue is not good here, troubles with binkd on slow links. */ } } binkp_clear_filelist(); 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; #endif #ifdef HAVE_ZLIB_H 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; if ((bp.PLZflag == Active) && (len > 20)) { zbuf = calloc(BINKP_ZIPBUFLEN, sizeof(char)); 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. */ if (!cmd) { 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 */ if (cmd) { header = ((BINKP_CONTROL_BLOCK + BINKP_PLZ_BLOCK + zlen) & 0xffff); } else { 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 { 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; } if (!cmd && (last != bp.cmpblksize)) Syslog('b', "Binkp: adjusting next blocksize to %d bytes", bp.cmpblksize); #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); 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: 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.Flags); t = time(NULL); if (!rc) rc = binkp_send_command(MM_NUL,"TIME %s", rfcdate(t)); if (!rc) { if (nodes.NoBinkp11) 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.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, unsigned long *len, int *cmd) { int b0, b1; #ifdef HAVE_ZLIB_H int rc, zlen, plz = FALSE; char *zbuf; #endif *len = *cmd = 0; b0 = GETCHAR(BINKP_TIMEOUT); if (tty_status) goto to; if (b0 & 0x80) *cmd = 1; #ifdef HAVE_ZLIB_H /* * During session setup even if we are not yet in PLZ mode, * we already accept zlib compressed packets. This assumes * that there are no command messages longer then 16Kb. */ if ((b0 & 0x40) && (bp.PLZflag != No)) { Syslog('b', "Binkp: binkp_recv_command() compressed block"); plz = TRUE; } #endif b1 = GETCHAR(BINKP_TIMEOUT / 2); if (tty_status) goto to; #ifdef HAVE_ZLIB_H if (plz) { *len = (b0 & 0x3f) << 8; zbuf = calloc(BINKP_ZIPBUFLEN, sizeof(char)); GET(zbuf, *len, BINKP_TIMEOUT / 2); zlen = *len; rc = uncompress(buf, len, zbuf, zlen); free(zbuf); if (rc == Z_OK) { Syslog('b', "Binkp: uncompress size %d => %d", zlen, len); } else { Syslog('b', "Binkp: uncompress error %d", rc); tty_status = STAT_UNCOMP; } buf[*len] = '\0'; } else { *len = (b0 & 0x7f) << 8; *len += b1; GET(buf, *len, BINKP_TIMEOUT / 2); buf[*len] = '\0'; } #else *len = (b0 & 0x7f) << 8; *len += b1; GET(buf, *len, BINKP_TIMEOUT / 2); buf[*len] = '\0'; #endif if (tty_status) goto to; 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); } } 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"))) { Syslog('b', "Binkp: parsing opt \"%s\"", printable(q, 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) { Syslog('b', "Binkp: got PLZ, current state %s", opstate[bp.PLZflag]); if (bp.PLZflag == WeCan) { bp.PLZflag = TheyWant; Syslog('b', "PLZflag WeCan => TheyWant"); binkp_send_command(MM_NUL,"OPT PLZ"); Syslog('b', "PLZflag TheyWant => Active"); bp.PLZflag = Active; Syslog('+', " : zlib compression active"); } else if (bp.PLZflag == WeWant) { bp.PLZflag = Active; Syslog('b', "PLZflag WeWant => 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 int plz = FALSE; 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; plz = bp.header & BINKP_PLZ_BLOCK; } 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 (plz) { zbuf = calloc(BINKP_ZIPBUFLEN, sizeof(char)); 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"); 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); } 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"); /* * 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 = IsSent; cursend = NULL; bp.TxState = TxGNF; } else { Syslog('+', "Binkp: requested offset = filesize, but is not the current file"); } } 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; debug_binkp_list(&bll); 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; struct stat tstat; if (stat(fal->local, &tstat) != 0) { Syslog('+', "$Binkp: can't add %s to sendlist", fal->local); return; } if (strstr(fal->remote, (char *)".pkt")) bp.nethold += tstat.st_size; else bp.mailhold += tstat.st_size; for (tmpl = bkll; *tmpl; tmpl = &((*tmpl)->next)); *tmpl = (binkp_list *)malloc(sizeof(binkp_list)); (*tmpl)->next = NULL; (*tmpl)->state = NoState; (*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; } void debug_binkp_list(binkp_list **bkll) { binkp_list *tmpl; Syslog('B', "Current filelist:"); for (tmpl = *bkll; tmpl; tmpl = tmpl->next) Syslog('B', "%s %s %s %ld", MBSE_SS(tmpl->local), MBSE_SS(tmpl->remote), lbstate[tmpl->state], tmpl->offset); } /* * Clear current filelist */ void binkp_clear_filelist(void) { binkp_list *tmp; if (tosend != NULL) { Syslog('b', "Binkp: clear current filelist"); for (tmp = bll; bll; bll = tmp) { tmp = bll->next; if (bll->local) free(bll->local); if (bll->remote) free(bll->remote); free(bll); } tidy_filelist(tosend, TRUE); tosend = NULL; respond = NULL; } }