/***************************************************************************** * * $Id$ * 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" #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 rbuf[2048]; /* * Local prototypes */ char *unix2binkp(char *); char *binkp2unix(char *); int binkp_expired(void); void b_banner(int); void b_nul(char *); void fill_binkp_list(binkp_list **, file_list *, off_t); void debug_binkp_list(binkp_list **); void binkp_send_data(char *, int); void binkp_send_control(int id, ...); int binkp_recv_frame(char *, int *, int *); void binkp_settimer(int); int resync(off_t); static int orgbinkp(void); static int ansbinkp(void); static int binkp_batch(file_list *, int); extern char *ttystat[]; extern int Loaded; extern pid_t mypid; extern struct sockaddr_in peeraddr; 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; static int RxState; static int TxState; static int TfState; static time_t Timer; static int NRflag = FALSE; static int MBflag = FALSE; static int NDflag = FALSE; static int CRYPTflag = FALSE; static int CRAMflag = FALSE; static int CRCflag = FALSE; static int Remote_1_1 = FALSE; unsigned long nethold, mailhold; int transferred = FALSE; int batchnr = 0, crc_errors = 0; unsigned char *MD_challenge = NULL; /* Received CRAM challenge data */ int ext_rand = 0; int binkp(int role) { int rc = MBERR_OK; fa_list *eff_remote; file_list *tosend = NULL, *request = NULL, *respond = NULL, *tmpfl; char *nonhold_mail; if (role == 1) { Syslog('+', "Binkp: start outbound session"); if (orgbinkp()) { rc = MBERR_SESSION_ERROR; } } else { Syslog('+', "Binkp: start inbound session"); if (ansbinkp()) { rc = MBERR_SESSION_ERROR; } } if (rc) { Syslog('!', "Binkp: session failed"); return rc; } /* * Adjust file requests support. We only send requests to binkp/1.1 * systems and if file requests are not forbidden by setup. */ if (Remote_1_1 == FALSE) localoptions |= NOFREQS; if (localoptions & NOFREQS) session_flags &= ~SESSION_WAZOO; else session_flags |= SESSION_WAZOO; Syslog('b', "Binkp: WAZOO requests: %s", (session_flags & SESSION_WAZOO) ? "True":"False"); nonhold_mail = (char *)ALL_MAIL; eff_remote = remote; /* * If remote doesn't have the 8.3 flag set, allow long filenames. */ if (!nodes.FNC) remote_flags &= ~SESSION_FNC; tosend = create_filelist(eff_remote, nonhold_mail, 0); if (request != NULL) { Syslog('b', "Binkp: inserting request list"); tmpfl = tosend; tosend = request; for (; request->next; request = request->next); request->next = tmpfl; request = NULL; } rc = binkp_batch(tosend, role); tidy_filelist(tosend, (rc == 0)); tosend = NULL; if ((rc == 0) && transferred && MBflag) { /* * Running Multiple Batch, only if last batch actually * did transfer some data. */ respond = respond_wazoo(); /* * Just create the tosend list again, there may be something * ready again for this node. */ tosend = create_filelist(eff_remote, nonhold_mail, 0); for (tmpfl = tosend; tmpfl->next; tmpfl = tmpfl->next); tmpfl->next = respond; rc = binkp_batch(tosend, role); tmpfl->next = NULL; } Syslog('+', "Binkp: end transfer rc=%d", rc); closetcp(); if (!MBflag) { /* * In singe batch mode we process filerequests after the batch. * The results will be put on hold for the calling node. */ respond = respond_wazoo(); for (tmpfl = respond; tmpfl; tmpfl = tmpfl->next) { if (strncmp(tmpfl->local, "/tmp", 4)) { attach(*remote->addr, tmpfl->local, LEAVE, 'h'); Syslog('+', "Binkp: put on hold: %s", MBSE_SS(tmpfl->local)); } else { file_mv(tmpfl->local, pktname(remote->addr, 'h')); Syslog('+', "Binkp: new netmail: %s", pktname(remote->addr, 'h')); } } } tidy_filelist(request, (rc == 0)); tidy_filelist(tosend, (rc == 0)); tidy_filelist(respond, 0); rc = abs(rc); return rc; } int resync(off_t off) { return 0; } /* * 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 { 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) 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; } /* * Transmit data frame */ void binkp_send_data(char *buf, int len) { unsigned short header = 0; header = ((BINKP_DATA_BLOCK + len) & 0xffff); PUTCHAR((header >> 8) & 0x00ff); PUTCHAR(header & 0x00ff); if (len) PUT(buf, len); FLUSHOUT(); binkp_settimer(BINKP_TIMEOUT); } /* * Transmit control frame */ void binkp_send_control(int id,...) { va_list args; char *fmt, *s; binkp_frame frame; static char buf[1024]; int sz; va_start(args, id); fmt = va_arg(args, char*); if (fmt) { vsprintf(buf, fmt, args); sz = ((1 + strlen(buf)) & 0x7fff); } else { buf[0]='\0'; sz = 1; } frame.header = ((BINKP_CONTROL_BLOCK + sz) & 0xffff); frame.id = (char)id; frame.data = buf; s = (unsigned char *)malloc(sz + 2 + 1); s[sz + 2] = '\0'; s[0] = ((frame.header >> 8)&0xff); s[1] = (frame.header & 0xff); s[2] = frame.id; if (frame.data[0]) strncpy(s + 3, frame.data, sz-1); PUT(s, sz+2); FLUSHOUT(); free(s); va_end(args); binkp_settimer(BINKP_TIMEOUT); } /* * Receive control frame */ int binkp_recv_frame(char *buf, int *len, int *cmd) { int b0, b1; *len = *cmd = 0; b0 = GETCHAR(180); 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, 120); 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; } 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); } void b_banner(int Norequests) { time_t t; binkp_send_control(MM_NUL,"SYS %s", CFG.bbs_name); binkp_send_control(MM_NUL,"ZYZ %s", CFG.sysop_name); binkp_send_control(MM_NUL,"LOC %s", CFG.location); binkp_send_control(MM_NUL,"NDL %s", CFG.Flags); t = time(NULL); binkp_send_control(MM_NUL,"TIME %s", rfcdate(t)); Syslog('b', "Binkp: M_NUL VER mbcico/%s/%s-%s binkp/1.%d", VERSION, OsName(), OsCPU(), Norequests ? 0 : 1); binkp_send_control(MM_NUL,"VER mbcico/%s/%s-%s binkp/1.%d", VERSION, OsName(), OsCPU(), Norequests ? 0 : 1); if (strlen(CFG.Phone)) binkp_send_control(MM_NUL,"PHN %s", CFG.Phone); if (strlen(CFG.comment)) binkp_send_control(MM_NUL,"OPM %s", CFG.comment); } void b_nul(char *msg) { 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 (strstr(msg+4, "binkp/1.1")) { Remote_1_1 = TRUE; } else { Remote_1_1 = FALSE; } } 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 *)"NR") != NULL) NRflag = TRUE; if (strstr(msg, (char *)"MB") != NULL) MBflag = TRUE; if (strstr(msg, (char *)"ND") != NULL) NDflag = TRUE; if (strstr(msg, (char *)"CRYPT") != NULL) { CRYPTflag = TRUE; // Syslog('+', "Remote requests CRYPT mode"); } 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 (MD_challenge) free(MD_challenge); MD_challenge = MD_getChallenge(msg, NULL); } } if (strstr(msg, (char *)"CRC") != NULL) { CRCflag = TRUE; Syslog('b', "Binkp: remote supports CRC32 mode"); } } else Syslog('+', "Binkp: M_NUL \"%s\"", msg); } /* * Originate a binkp session */ SM_DECL(orgbinkp, (char *)"orgbinkp") SM_STATES waitconn, sendpass, waitaddr, authremote, waitok SM_NAMES (char *)"waitconn", (char *)"sendpass", (char *)"waitaddr", (char *)"authremote", (char *)"waitok" SM_EDECL faddr *primary; char *p, *q; int i, rc, bufl, cmd, dupe; fa_list **tmp, *tmpa; int SendPass = FALSE; faddr *fa, ra; SM_START(waitconn) SM_STATE(waitconn) Loaded = FALSE; Syslog('+', "Binkp: node %s", ascfnode(remote->addr, 0x1f)); IsDoing("Connect binkp %s", ascfnode(remote->addr, 0xf)); if ((noderecord(remote->addr)) && nodes.CRC32 && !CFG.NoCRC32) { binkp_send_control(MM_NUL,"OPT MB CRC"); } else { binkp_send_control(MM_NUL,"OPT MB"); } if (((noderecord(remote->addr)) && nodes.NoFreqs) || CFG.NoFreqs) b_banner(TRUE); else b_banner(FALSE); /* * 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])); } binkp_send_control(MM_ADR, "%s", p); free(p); tidy_faddr(primary); SM_PROCEED(waitaddr) SM_STATE(waitaddr) for (;;) { if ((rc = binkp_recv_frame(rbuf, &bufl, &cmd))) { Syslog('!', "Binkp: error receiving remote info"); SM_ERROR; } if (cmd) { if (rbuf[0] == MM_ADR) { p = xstrcpy(&rbuf[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: bad remote address: \"%s\"", printable(q, 0)); binkp_send_control(MM_ERR, "Bad address"); } for (tmpa = remote; tmpa; tmpa = tmpa->next) { Syslog('+', "Address : %s", ascfnode(tmpa->addr, 0x1f)); if (nodelock(tmpa->addr)) { binkp_send_control(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(sendpass) } else if (rbuf[0] == MM_BSY) { Syslog('!', "Binkp: M_BSY \"%s\"", printable(&rbuf[1], 0)); SM_ERROR; } else if (rbuf[0] == MM_ERR) { Syslog('!', "Binkp: M_ERR \"%s\"", printable(&rbuf[1], 0)); SM_ERROR; } else if (rbuf[0] == MM_NUL) { b_nul(&rbuf[1]); } } } SM_STATE(sendpass) if (MD_challenge && strlen(nodes.Spasswd)) { char *pw = NULL, *tp = NULL; pw = xstrcpy(nodes.Spasswd); tp = MD_buildDigest(pw, MD_challenge); if (!tp) { Syslog('!', "Unable to build MD5 digest"); SM_ERROR; } SendPass = TRUE; CRAMflag = TRUE; binkp_send_control(MM_PWD, "%s", tp); free(tp); free(pw); } else { if (strlen(nodes.Spasswd)) { SendPass = TRUE; binkp_send_control(MM_PWD, "%s", nodes.Spasswd); } else { binkp_send_control(MM_PWD, "-"); } } 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(waitok) } else { Syslog('!', "Binkp: error, the wrong node is reached"); binkp_send_control(MM_ERR, "No AKAs in common or all AKAs busy"); SM_ERROR; } SM_STATE(waitok) for (;;) { if ((rc = binkp_recv_frame(rbuf, &bufl, &cmd))) { Syslog('!', "Binkp: error waiting for remote acknowledge"); SM_ERROR; } if (cmd) { if (rbuf[0] == MM_OK) { Syslog('!', "Binkp: M_OK \"%s\"", printable(&rbuf[1], 0)); if (SendPass) Syslog('+', "Binkp: %spassword protected session", CRAMflag ? "MD5 ":""); else Syslog('+', "Binkp: unprotected session"); SM_SUCCESS; } else if (rbuf[0] == MM_BSY) { Syslog('!', "Binkp: M_BSY \"%s\"", printable(&rbuf[1], 0)); SM_ERROR; } else if (rbuf[0] == MM_ERR) { Syslog('!', "Binkp: M_ERR \"%s\"", printable(&rbuf[1], 0)); SM_ERROR; } else if (rbuf[0] == MM_NUL) { b_nul(&rbuf[1]); } } } SM_END SM_RETURN /* * Answer a binkp session */ SM_DECL(ansbinkp, (char *)"ansbinkp") SM_STATES waitconn, waitaddr, waitpwd, pwdack SM_NAMES (char *)"waitconn", (char *)"waitaddr", (char *)"waitpwd", (char *)"pwdack" SM_EDECL char *p, *q; int i, rc, bufl, cmd, dupe; fa_list **tmp, *tmpa; faddr *fa; SM_START(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_control(MM_BSY, "This system is closed, try again later"); SM_ERROR; } if (!CFG.NoMD5 && ((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 "); MD_toString(s+4, MD_challenge[0], MD_challenge+1); CRAMflag = TRUE; Syslog('b', "Binkp: sending \"%s\"", s); binkp_send_control(MM_NUL, "%s", s); } b_banner(CFG.NoFreqs); 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])); } binkp_send_control(MM_ADR, "%s", p); free(p); SM_PROCEED(waitaddr) SM_STATE(waitaddr) for (;;) { if ((rc = binkp_recv_frame(rbuf, &bufl, &cmd))) { Syslog('!', "Binkp: error waiting for remote info"); SM_ERROR; } if (cmd) { if (rbuf[0] == MM_ADR) { p = xstrcpy(&rbuf[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: bad remote address: \"%s\"", printable(q, 0)); binkp_send_control(MM_ERR, "Bad address"); } for (tmpa = remote; tmpa; tmpa = tmpa->next) { Syslog('+', "Address : %s", ascfnode(tmpa->addr, 0x1f)); if (nodelock(tmpa->addr)) { binkp_send_control(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; } } 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 (MBflag) { Syslog('b', "Binkp: remote supports MB"); binkp_send_control(MM_NUL,"OPT MB"); } if (CRCflag) { if (Loaded && nodes.CRC32 && !CFG.NoCRC32) { binkp_send_control(MM_NUL,"OPT CRC"); Syslog('+', "Binkp: using file transfers with CRC32 checking"); } else { Syslog('b', "Binkp: CRC32 support is diabled here"); CRCflag = FALSE; } } 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(waitpwd) } else if (rbuf[0] == MM_ERR) { Syslog('!', "Binkp: M_ERR \"%s\"", printable(&rbuf[1], 0)); SM_ERROR; } else if (rbuf[0] == MM_NUL) { b_nul(&rbuf[1]); } } } SM_STATE(waitpwd) for (;;) { if ((rc = binkp_recv_frame(rbuf, &bufl, &cmd))) { Syslog('!', "Binkp: error waiting for password"); SM_ERROR; } if (cmd) { if (rbuf[0] == MM_PWD) { SM_PROCEED(pwdack) } else if (rbuf[0] == MM_ERR) { Syslog('!', "Binkp: M_ERR \"%s\"", printable(&rbuf[1], 0)); SM_ERROR; } else if (rbuf[0] == MM_NUL) { b_nul(&rbuf[1]); } } } SM_STATE(pwdack) tmpa = remote; if ((strncmp(&rbuf[1], "CRAM-", 5) == 0) && CRAMflag && Loaded) { char *sp, *pw; pw = xstrcpy(nodes.Spasswd); sp = MD_buildDigest(pw, MD_challenge); free(pw); if (sp != NULL) { if (strcmp(&rbuf[1], sp)) { Syslog('+', "Binkp: bad MD5 crypted password"); binkp_send_control(MM_ERR, "*** Password error, check setup ***"); free(sp); sp = NULL; SM_ERROR; } else { free(sp); sp = NULL; Syslog('+', "Binkp: MD5 password OK, protected session"); inbound_open(tmpa->addr, TRUE); binkp_send_control(MM_OK, "secure"); SM_SUCCESS; } } else { Syslog('!', "Binkp: could not build MD5 digest"); binkp_send_control(MM_ERR, "*** Internal error ***"); SM_ERROR; } } else if ((strcmp(&rbuf[1], "-") == 0) && !Loaded) { Syslog('+', "Binkp: node not in setup, unprotected session"); inbound_open(tmpa->addr, FALSE); binkp_send_control(MM_OK, ""); SM_SUCCESS; } else if ((strcmp(&rbuf[1], "-") == 0) && Loaded && !strlen(nodes.Spasswd)) { Syslog('+', "Binkp: node in setup but no session password, unprotected session"); inbound_open(tmpa->addr, FALSE); binkp_send_control(MM_OK, ""); SM_SUCCESS; } else if ((strcmp(&rbuf[1], nodes.Spasswd) == 0) && Loaded) { Syslog('+', "Binkp: password OK, protected session"); inbound_open(tmpa->addr, TRUE); binkp_send_control(MM_OK, "secure"); SM_SUCCESS; } else { Syslog('?', "Binkp: password error: expected \"%s\", got \"%s\"", nodes.Spasswd, &rbuf[1]); binkp_send_control(MM_ERR, "*** Password error, check setup ***"); SM_ERROR; } SM_END SM_RETURN void fill_binkp_list(binkp_list **bll, file_list *fal, off_t offs) { binkp_list **tmpl; struct stat tstat; if (stat(fal->local, &tstat) != 0) { Syslog('!', "$Can't add %s to sendlist", fal->local); exit; } if (strstr(fal->remote, (char *)".pkt")) nethold += tstat.st_size; else mailhold += tstat.st_size; for (tmpl = bll; *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; } char *lbstat[]={(char *)"None", (char *)"Sending", (char *)"IsSent", (char *)"Got", (char *)"Skipped", (char *)"Get"}; void debug_binkp_list(binkp_list **bll) { binkp_list *tmpl; Syslog('B', "Current filelist:"); for (tmpl = *bll; tmpl; tmpl = tmpl->next) Syslog('B', "%s %s %s %ld", MBSE_SS(tmpl->local), MBSE_SS(tmpl->remote), lbstat[tmpl->state], tmpl->offset); } int binkp_batch(file_list *to_send, int role) { int rc = 0, NotDone, rxlen = 0, txlen = 0, rxerror = FALSE; static char *txbuf, *rxbuf; FILE *txfp = NULL, *rxfp = NULL; long txpos = 0, rxpos = 0, stxpos = 0, written, rsize, roffs, lsize, gsize, goffset; int sverr, cmd = FALSE, GotFrame = FALSE, blklen = 0, c, Found = FALSE; unsigned short header = 0; char *rname, *lname, *gname; time_t rtime, ltime, gtime; unsigned long rcrc = 0, tcrc = 0, rxcrc = 0; off_t rxbytes; binkp_list *bll = NULL, *tmp, *tmpg, *cursend = NULL; file_list *tsl; struct timeval rxtvstart, rxtvend; struct timeval txtvstart, txtvend; struct timezone tz; rxtvstart.tv_sec = rxtvstart.tv_usec = 0; rxtvend.tv_sec = rxtvend.tv_usec = 0; txtvstart.tv_sec = txtvstart.tv_usec = 0; txtvend.tv_sec = txtvend.tv_usec = 0; tz.tz_minuteswest = tz.tz_dsttime = 0; batchnr++; Syslog('+', "Binkp: starting batch %d", batchnr); IsDoing("Binkp %s %s", (role == 1)?"out":"inb", ascfnode(remote->addr, 0xf)); txbuf = calloc(MAX_BLKSIZE + 3, sizeof(unsigned char)); rxbuf = calloc(MAX_BLKSIZE + 3, sizeof(unsigned char)); rname = calloc(512, sizeof(char)); lname = calloc(512, sizeof(char)); gname = calloc(512, sizeof(char)); TfState = Switch; RxState = RxWaitFile; TxState = TxGetNextFile; binkp_settimer(BINKP_TIMEOUT); nethold = mailhold = 0L; transferred = FALSE; /* * Build a new filelist from the existing filelist. * This one is special for binkp behaviour. */ for (tsl = to_send; tsl; tsl = tsl->next) { if (tsl->remote != NULL) fill_binkp_list(&bll, tsl, 0L); } debug_binkp_list(&bll); Syslog('+', "Binkp: mail %ld, files %ld bytes", nethold, mailhold); binkp_send_control(MM_NUL, "TRF %ld %ld", nethold, mailhold); while ((RxState != RxDone) || (TxState != TxDone)) { Nopper(); if (binkp_expired()) { Syslog('!', "Binkp: Transfer timeout"); Syslog('b', "Binkp: TxState=%d, RxState=%d, rxlen=%d", TxState, RxState, rxlen); RxState = RxDone; TxState = TxDone; binkp_send_control(MM_ERR, "Transfer timeout"); rc = MBERR_FTRANSFER; break; } /* * Receiver binkp frame */ for (;;) { if (GotFrame) { Syslog('b', "Binkp: WARNING: frame not processed"); break; } else { c = GETCHAR(0); if (c < 0) { c = -c; if (c == STAT_TIMEOUT) { usleep(1); break; } Syslog('?', "Binkp: receiver status %s", ttystat[c]); TxState = TxDone; RxState = RxDone; rc = (MBERR_TTYIO + (-c)); break; } else { switch (rxlen) { case 0: header = c << 8; break; case 1: header += c; break; default:rxbuf[rxlen-2] = c; } if (rxlen == 1) { cmd = header & 0x8000; blklen = header & 0x7fff; } if ((rxlen == (blklen + 1) && (rxlen >= 1))) { GotFrame = TRUE; binkp_settimer(BINKP_TIMEOUT); rxbuf[rxlen-1] = '\0'; break; } rxlen++; } } } /* * Transmitter state machine */ switch (TxState) { case TxGetNextFile: 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; if (CRCflag) tcrc = file_crc(tmp->local, FALSE); else tcrc = 0; txfp = fopen(tmp->local, "r"); if (txfp == NULL) { sverr = errno; if ((sverr == ENOENT) || (sverr == EINVAL)) { Syslog('+', "Binkp: file %s doesn't exist, removing", MBSE_SS(tmp->local)); tmp->state = Got; } else { WriteError("$Binkp: can't open %s, skipping", MBSE_SS(tmp->local)); tmp->state = Skipped; } break; } if (fcntl(fileno(txfp), F_SETLK, &txflock) != 0) { WriteError("$Binkp: can't lock file %s, skipping", MBSE_SS(tmp->local)); fclose(txfp); tmp->state = Skipped; break; } txpos = stxpos = tmp->offset; Syslog('+', "Binkp: send \"%s\" as \"%s\"", MBSE_SS(tmp->local), MBSE_SS(tmp->remote)); if (CRCflag && tcrc) { Syslog('+', "Binkp: size %lu bytes, dated %s, crc %lx", (unsigned long)tmp->size, date(tmp->date), tcrc); binkp_send_control(MM_FILE, "%s %lu %ld %ld %lx", MBSE_SS(tmp->remote), (unsigned long)tmp->size, (long)tmp->date, (unsigned long)tmp->offset, tcrc); } else { Syslog('+', "Binkp: size %lu bytes, dated %s", (unsigned long)tmp->size, date(tmp->date)); binkp_send_control(MM_FILE, "%s %lu %ld %ld", MBSE_SS(tmp->remote), (unsigned long)tmp->size, (long)tmp->date, (unsigned long)tmp->offset); } gettimeofday(&txtvstart, &tz); tmp->state = Sending; cursend = tmp; TxState = TxTryRead; transferred = TRUE; break; } /* if state == NoState */ } /* for */ if (tmp == NULL) { /* * No more files to send */ TxState = TxWaitLastAck; Syslog('b', "Binkp: transmitter to WaitLastAck"); } break; case TxTryRead: /* * Check if there is room in the output buffer */ if ((WAITPUTGET(-1) & 2) != 0) TxState = TxReadSend; break; case TxReadSend: fseek(txfp, txpos, SEEK_SET); txlen = fread(txbuf, 1, SND_BLKSIZE, txfp); if (txlen == 0) { if (ferror(txfp)) { WriteError("$Binkp: error reading from file"); TxState = TxGetNextFile; cursend->state = Skipped; debug_binkp_list(&bll); break; } /* * Send empty dataframe, most binkp mailers need it to detect EOF. */ binkp_send_data(txbuf, 0); /* * calculate time needed and bytes transferred */ gettimeofday(&txtvend, &tz); /* * Close transmitter file */ fclose(txfp); if (txpos >= 0) { stxpos = txpos - stxpos; Syslog('+', "Binkp: OK %s", transfertime(txtvstart, txtvend, stxpos, TRUE)); } else { Syslog('+', "Binkp: transmitter skipped file after %ld seconds", txtvend.tv_sec - txtvstart.tv_sec); } cursend->state = IsSent; TxState = TxGetNextFile; break; } else { txpos += txlen; sentbytes += txlen; binkp_send_data(txbuf, txlen); } TxState = TxTryRead; break; case TxWaitLastAck: debug_binkp_list(&bll); NotDone = FALSE; for (tmp = bll; tmp; tmp = tmp->next) if ((tmp->state != Got) && (tmp->state != Skipped)) { NotDone = TRUE; break; } if (tmp == NULL) { TxState = TxDone; binkp_send_control(MM_EOB, ""); Syslog('+', "Binkp: sending EOB"); } break; case TxDone: break; } /* * Process received frame */ if (GotFrame) { if (cmd) { switch (rxbuf[0]) { case MM_ERR: Syslog('+', "Binkp: got ERR: %s", rxbuf+1); RxState = RxDone; TxState = TxDone; rc = MBERR_FTRANSFER; break; case MM_BSY: Syslog('+', "Binkp: got BSY: %s", rxbuf+1); RxState = RxDone; TxState = TxDone; rc = MBERR_FTRANSFER; break; case MM_SKIP: Syslog('+', "Binkp: got SKIP: %s", rxbuf+1); break; case MM_GET: Syslog('+', "Binkp: got GET: %s", rxbuf+1); sscanf(rxbuf+1, "%s %ld %ld %ld", gname, &gsize, >ime, &goffset); for (tmpg = bll; tmpg; tmpg = tmpg->next) { if (strcasecmp(tmpg->remote, gname) == 0) { tmpg->state = NoState; tmpg->offset = goffset; Syslog('+', "Remote wants %s again, offset %ld", gname, goffset); TxState = TxGetNextFile; } } break; case MM_GOT: Syslog('+', "Binkp: got GOT: %s", rxbuf+1); sscanf(rxbuf+1, "%s %ld %ld", lname, &lsize, <ime); Found = FALSE; for (tmp = bll; tmp; tmp = tmp->next) if ((strcmp(lname, tmp->remote) == 0) && (lsize == tmp->size) && (ltime == tmp->date)) { Syslog('+', "Binkp: remote GOT \"%s\"", tmp->remote); tmp->state = Got; Found = TRUE; } if (!Found) { Syslog('!', "Binkp: unexpected GOT \"%s\"", rxbuf+1); } break; case MM_NUL: b_nul(rxbuf+1); break; case MM_EOB: Syslog('+', "Binkp: got EOB"); RxState = RxEndOfBatch; break; case MM_FILE: Syslog('b', "Binkp: got FILE: %s", rxbuf+1); if ((RxState == RxWaitFile) || (RxState == RxEndOfBatch)) { RxState = RxAcceptFile; if (strlen(rxbuf) < 512) { /* * Check against buffer overflow */ rcrc = 0; if (CRCflag) { sscanf(rxbuf+1, "%s %ld %ld %ld %lx", rname, &rsize, &rtime, &roffs, &rcrc); } else { sscanf(rxbuf+1, "%s %ld %ld %ld", rname, &rsize, &rtime, &roffs); } } else { Syslog('+', "Binkp: got corrupted FILE frame, size %d bytes", strlen(rxbuf)); } } else { Syslog('+', "Binkp: got unexpected FILE frame %s", rxbuf+1); } break; default: Syslog('+', "Binkp: Unexpected frame %d", rxbuf[0]); } } else { if (blklen) { if (RxState == RxReceData) { written = fwrite(rxbuf, 1, blklen, rxfp); if (CRCflag) rxcrc = upd_crc32(rxbuf, rxcrc, blklen); if (!written && blklen) { Syslog('+', "Binkp: file write error"); RxState = RxDone; } rxpos += written; if (rxpos == rsize) { RxState = RxWaitFile; if (CRCflag && rcrc) { rxcrc = rxcrc ^ 0xffffffff; if (rcrc == rxcrc) { binkp_send_control(MM_GOT, "%s %ld %ld %lx", rname, rsize, rtime, rcrc); closefile(); } else { rxerror = TRUE; crc_errors++; binkp_send_control(MM_SKIP, "%s %ld %ld %lx", rname, rsize, rtime, rcrc); Syslog('+', "Binkp: file CRC error nr %d, sending SKIP frame", crc_errors); if (crc_errors >= 3) { WriteError("Binkp: file CRC error nr %d, aborting session", crc_errors); binkp_send_control(MM_ERR, "Too much CRC errors, aborting session"); RxState = RxDone; rc = MBERR_FTRANSFER; } closefile(); } } else { /* * ACK without CRC check */ binkp_send_control(MM_GOT, "%s %ld %ld", rname, rsize, rtime); closefile(); } rxpos = rxpos - rxbytes; gettimeofday(&rxtvend, &tz); Syslog('+', "Binkp: %s %s", rxerror?"ERROR":"OK", transfertime(rxtvstart, rxtvend, rxpos, FALSE)); rcvdbytes += rxpos; RxState = RxWaitFile; transferred = TRUE; } } else { Syslog('+', "Binkp: unexpected DATA frame %d", rxbuf[0]); } } } GotFrame = FALSE; rxlen = 0; header = 0; blklen = 0; } /* * Receiver state machine */ switch (RxState) { case RxWaitFile: break; case RxAcceptFile: if (CRCflag) Syslog('+', "Binkp: receive file \"%s\" date %s size %ld offset %ld crc %lx", rname, date(rtime), rsize, roffs, rcrc); else Syslog('+', "Binkp: receive file \"%s\" date %s size %ld offset %ld", rname, date(rtime), rsize, roffs); (void)binkp2unix(rname); rxfp = openfile(binkp2unix(rname), rtime, rsize, &rxbytes, resync); gettimeofday(&rxtvstart, &tz); rxpos = 0; rxcrc = 0xffffffff; rxerror = FALSE; if (!diskfree(CFG.freespace)) { Syslog('+', "Binkp: low diskspace, sending BSY"); binkp_send_control(MM_BSY, "Low diskspace, try again later"); RxState = RxDone; TxState = TxDone; rc = MBERR_FTRANSFER; break; } if (rsize == rxbytes) { /* * We already got this file, send GOT so it will * be deleted at the remote. */ Syslog('+', "Binkp: already got %s, sending GOT", rname); if (CRCflag && rcrc) binkp_send_control(MM_GOT, "%s %ld %ld %lx", rname, rsize, rtime, rcrc); else binkp_send_control(MM_GOT, "%s %ld %ld", rname, rsize, rtime); RxState = RxWaitFile; rxfp = NULL; } else if (!rxfp) { /* * Some error, request to skip it */ Syslog('+', "Binkp: error file %s, sending SKIP", rname); if (CRCflag && rcrc) binkp_send_control(MM_SKIP, "%s %ld %ld %lx", rname, rsize, rtime, rcrc); else binkp_send_control(MM_SKIP, "%s %ld %ld", rname, rsize, rtime); RxState = RxWaitFile; } else { RxState = RxReceData; } break; case RxReceData: break; case RxEndOfBatch: if (TxState == TxDone) RxState = RxDone; break; case RxDone: break; } } debug_binkp_list(&bll); /* * Process all send files. */ for (tsl = to_send; tsl; tsl = tsl->next) { if (tsl->remote == NULL) { execute_disposition(tsl); } else { for (tmp = bll; tmp; tmp = tmp->next) { if ((strcmp(tmp->local, tsl->local) == 0) && (tmp->state == Got)) { execute_disposition(tsl); } } } } for (tmp = bll; bll; bll = tmp) { tmp = bll->next; if (bll->local) free(bll->local); if (bll->remote) free(bll->remote); free(bll); } free(txbuf); free(rxbuf); free(rname); free(lname); free(gname); /* * If there was an error, try to close a possible incomplete file in * the temp inbound so we can resume the next time we have a session * with this node. */ if (rc) closefile(); Syslog('+', "Binkp: batch %d completed rc=%d", batchnr, rc); return rc; }