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deb-mbse/lib/ftn.c

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/*****************************************************************************
*
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* $Id$
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* Purpose ...............: Fidonet Technology Network functions
* Remark ................: From ifmail with patches from P.Saratxaga
*
*****************************************************************************
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* Copyright (C) 1997-2002
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*
* 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, 675 Mass Ave, Cambridge, MA 02139, USA.
*****************************************************************************/
#define DB_FIDONET
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#include "../config.h"
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#include "libs.h"
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#include "memwatch.h"
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#include "structs.h"
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#include "users.h"
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#include "records.h"
#include "clcomm.h"
#include "dbftn.h"
#include "common.h"
#ifndef MAXUSHORT
#define MAXUSHORT 65535
#endif
#ifndef BLANK_SUBS
#define BLANK_SUBS '.'
#endif
int addrerror = 0;
void tidy_faddr(faddr *addr)
{
if (addr == NULL)
return;
if (addr->name)
free(addr->name);
if (addr->domain)
free(addr->domain);
free(addr);
}
faddr *parsefnode(char *s)
{
faddr addr, *tmp;
char *buf, *str, *p, *q, *n;
int good = 1;
if (s == NULL)
return NULL;
str = buf = xstrcpy(s);
while (isspace(*str))
str++;
if (*(p=str+strlen(str)-1) == '\n')
*(p--) ='\0';
while (isspace(*p))
*(p--) = '\0';
p=str + strlen(str) - 1;
if (((*str == '(') && (*p == ')')) || ((*str == '\"') && (*p == '\"')) ||
((*str == '\'') && (*p == '\'')) || ((*str == '<') && (*p == '>')) ||
((*str == '[') && (*p == ']')) || ((*str == '{') && (*p == '}'))) {
str++;
*p = '\0';
}
memset(&addr, 0, sizeof(faddr));
if ((p = strrchr(str,' '))) {
n = str;
str = p + 1;
while (isspace(*p))
*(p--) = '\0';
if (!strcasecmp(p - 2," of"))
*(p-2) = '\0';
else if (!strcasecmp(p - 1," @"))
*(p-1) = '\0';
p -= 3;
while (isspace(*p) || (*p == ','))
*(p--) = '\0';
if (strlen(n) > MAXNAME)
n[MAXNAME] = '\0';
if (*n != '\0')
addr.name = xstrcpy(n);
}
if ((p = strrchr(str, '@')))
*(p++) = '\0';
else if ((p = strrchr(str,'%')))
*(p++) = '\0';
else if ((q = strrchr(str,'#'))) {
*(q++) = '\0';
p = str;
str = q;
} else if (addr.name && (strrchr(addr.name,'@'))) {
str = xstrcpy(addr.name);
if ((p=strrchr(str,'@')))
*(p++) = '\0';
else if ((p=strrchr(str,'%')))
*(p++) = '\0';
} else
p = NULL;
if (p && ((q = strchr(p,'.'))))
*q = '\0';
addr.point = 0;
addr.node = 0;
addr.net = 0;
addr.zone = 0;
addr.domain = xstrcpy(p);
if ((p = strchr(str, ':'))) {
*(p++) = '\0';
if (strspn(str, "0123456789") == strlen(str))
addr.zone = atoi(str);
else
if (strcmp(str,"*") == 0)
addr.zone = -1;
else
good = 0;
str = p;
}
if ((p = strchr(str, '/'))) {
*(p++) = '\0';
if (strspn(str, "0123456789") == strlen(str))
addr.net = atoi(str);
else
if (strcmp(str, "*") == 0)
addr.net = -1;
else
good = 0;
str = p;
}
if ((p=strchr(str, '.'))) {
*(p++) = '\0';
if (strspn(str, "0123456789") == strlen(str))
addr.node = atoi(str);
else
if (strcmp(str, "*") == 0)
addr.node = -1;
else
good = 0;
str = p;
} else {
if (strspn(str, "0123456789") == strlen(str))
addr.node = atoi(str);
else
if (strcmp(str, "*") == 0)
addr.node = -1;
else
good = 0;
str = NULL;
}
if (str) {
if (strspn(str, "0123456789") == strlen(str))
addr.point = atoi(str);
else
if (strcmp(str, "*") == 0)
addr.point = -1;
else
good = 0;
}
if (buf)
free(buf);
if (good) {
tmp = (faddr *)malloc(sizeof(addr));
tmp->name = NULL;
tmp->domain = addr.domain;
tmp->point = addr.point;
tmp->node = addr.node;
tmp->net = addr.net;
tmp->zone = addr.zone;
return tmp;
} else {
if (addr.name)
free(addr.name);
if (addr.domain)
free(addr.domain);
return NULL;
}
}
faddr *parsefaddr(char *s)
{
faddr *tmpaddr = NULL;
parsedaddr rfcaddr;
int gotzone = 0, gotnet = 0, gotnode = 0, gotpoint = 0;
int zone = 0, net = 0, noden = 0, point = 0;
char *domain = NULL, *freename = NULL;
long num;
char *p = NULL,*q = NULL,*t = NULL;
int l, quoted;
FILE *fp;
rfcaddr.target = NULL;
rfcaddr.remainder = NULL;
rfcaddr.comment = NULL;
t = xstrcpy(s);
if (*(q=t+strlen(t)-1) == '\n')
*q='\0';
if (((*(p=t) == '(') && (*(q=p+strlen(p)-1) == ')')) || ((*p == '\"') && (*q == '\"'))) {
p++;
*q='\0';
}
if (strchr(s,'@') || strchr(s,'%') || strchr(s,'!'))
rfcaddr = parserfcaddr(p);
else {
addrerror = 0;
rfcaddr.target = xstrcpy(p);
}
free(t);
if ((addrerror) || (rfcaddr.target == NULL))
goto leave;
p = calloc(PATH_MAX, sizeof(char));
sprintf(p, "%s/etc/domain.data", getenv("MBSE_ROOT"));
if ((fp = fopen(p, "r")) == NULL) {
WriteError("$Can't open %s", p);
free(p);
} else {
free(p);
fread(&domainhdr, sizeof(domainhdr), 1, fp);
p = rfcaddr.target;
while (fread(&domtrans, domainhdr.recsize, 1, fp) == 1) {
q = p + strlen(p) - strlen(domtrans.intdom);
if ((q >= p) && (strcasecmp(domtrans.intdom, q) == 0)) {
*q = '\0';
q = malloc(strlen(p) + strlen(domtrans.ftndom) +1);
strcpy(q, p);
strcat(q, domtrans.ftndom);
p = q;
free(rfcaddr.target);
rfcaddr.target = p;
break;
}
}
fclose(fp);
}
if (((l = strlen(rfcaddr.target)) > 4) && (strcasecmp(rfcaddr.target + l - 4,".ftn") == 0)) {
rfcaddr.target[l-4] = '\0';
}
for (p = strtok(rfcaddr.target, "."); p; p = strtok(NULL,".")) {
if (((l = strlen(p + 1)) > 0) && (l <= 5) &&
(strspn(p + 1, "0123456789") == l)) {
num = atol(p + 1);
switch (*p) {
case 'z':
case 'Z':
gotzone++;
if (num > MAXUSHORT)
addrerror |= ADDR_BADTOKEN;
zone = num;
break;
case 'n':
case 'N':
gotnet++;
if (num > MAXUSHORT)
addrerror |= ADDR_BADTOKEN;
net = num;
break;
case 'f':
case 'F':
gotnode++;
if (num > MAXUSHORT)
addrerror |= ADDR_BADTOKEN;
noden = num;
break;
case 'p':
case 'P':
gotpoint++;
if (num > MAXUSHORT)
addrerror |= ADDR_BADTOKEN;
point = num;
break;
default:
if (gotnet && gotnode) {
if (domain == NULL)
domain = xstrcpy(p);
} else
addrerror |= ADDR_BADTOKEN;
break;
}
} else { /* not "cNNNN" token */
if (gotnet && gotnode) {
if (domain == NULL)
domain = xstrcpy(p);
} else
addrerror |= ADDR_BADTOKEN;
}
}
if ((gotzone > 1) || (gotnet != 1) || (gotnode != 1) || (gotpoint > 1)) {
addrerror |= ADDR_BADSTRUCT;
}
if (addrerror)
goto leave;
if (rfcaddr.remainder) {
quoted = 0;
if ((*(p = rfcaddr.remainder) == '\"') && (*(q = p + strlen(p) -1) == '\"')) {
p++;
*q='\0';
quoted = 1;
}
if (strchr(p,'@') || strchr(p,'%') || strchr(p,'!')) {
if (((q=strrchr(p,'%'))) && !strchr(p,'@'))
*q = '@';
} else if ((!quoted) && (!strchr(p, ' '))) {
for (q = p; *q; q++) {
if (*q == BLANK_SUBS)
*q = ' ';
else if (*q == '.')
*q = ' ';
else if (*q == '_')
*q = ' ';
}
}
for (q = p; *q; q++) {
if ((*q == '\\') && ((*(q+1) == '"') || ((*(q+1) == '\\') && (!quoted)))) {
*q='\0';
strcat(p, q+1);
}
}
if (strspn(p," ") != strlen(p))
freename = xstrcpy(qp_decode(p));
}
tmpaddr=(faddr*)malloc(sizeof(faddr));
tmpaddr->zone=zone;
tmpaddr->net=net;
tmpaddr->node=noden;
tmpaddr->point=point;
tmpaddr->domain=domain;
domain=NULL;
tmpaddr->name=freename;
freename=NULL;
leave:
if (domain)
free(domain);
if (freename)
free(freename);
tidyrfcaddr(rfcaddr);
return tmpaddr;
}
char *ascinode(faddr *a, int fl)
{
static char buf[128], *f, *t, *p;
static char *q;
int skip, found = FALSE;
FILE *fp;
if (a == NULL) {
strcpy(buf,"<none>");
return buf;
}
buf[0]='\0';
if ((fl & 0x80) && (a->name)) {
if ((strchr(a->name,'.')) || (strchr(a->name,'@')) ||
(strchr(a->name,'\'')) || (strchr(a->name,',')) ||
(strchr(a->name,'<')) || (strchr(a->name,'>')))
sprintf(buf+strlen(buf),"\"%s\" <",a->name);
else
sprintf(buf+strlen(buf),"%s <",a->name);
}
if ((fl & 0x40) && (a->name)) {
f = qp_encode(a->name, 0);
t = buf + strlen(buf);
skip = 0;
if ((!strchr(f,'@')) && ((strchr(f,BLANK_SUBS)) || (strchr(f,'.')) || (strchr(f,'_')))) {
skip = 1;
*t++='"';
}
while (*f) {
switch (*f) {
case '_':
case '.': *t++=*f;
break;
case ' ': if (!skip)
*t++=BLANK_SUBS;
else {
*t++='='; *t++='2'; *t++='0';
}
break;
case ',': { /* "," is a problem on mail addr */
if (!skip)
*t++='\\';
*t++='=';
*t++='2';
*t++='c';
}
case '@': if (skip) {
*t++='"';
skip=0;
}
*t++='%';
break;
case '"': *t++='\\';
*t++=*f;
break;
case '>':
case '<':
case '\'': if (!skip)
*t++='\\';
*t++=*f;
break;
default: if ((((*f & 0xff) > 0x29) && ((*f & 0xff) < 0x3a)) ||
(((*f & 0xff) > 0x40) && ((*f & 0xff) < 0x5b)) ||
(((*f & 0xff) > 0x60) && ((*f & 0xff) < 0x7b)))
*t++=*f;
else {
if (!skip)
*t++='\\';
*t++=*f;
}
break;
}
f++;
}
if (skip)
*t++='"';
skip = 0;
*t++ = '@';
*t++ = '\0';
}
if ((fl & 0x01) && (a->point))
sprintf(buf+strlen(buf),"p%u.",a->point);
if (fl & 0x02)
sprintf(buf+strlen(buf),"f%u.",a->node);
if (fl & 0x04)
sprintf(buf+strlen(buf),"n%u.",a->net);
if ((fl & 0x08) && (a->zone))
sprintf(buf+strlen(buf),"z%u.",a->zone);
buf[strlen(buf)-1]='\0';
if (fl & 0x10) {
if (a->domain)
sprintf(buf+strlen(buf),".%s",a->domain);
}
if (fl & 0x20) {
if (a->domain) {
if ((fl & 0x10) == 0)
sprintf(buf+strlen(buf),".%s",a->domain);
} else {
if (SearchFidonet(a->zone))
sprintf(buf+strlen(buf), ".%s", fidonet.domain);
else
sprintf(buf+strlen(buf),".fidonet");
}
p = calloc(128, sizeof(char));
sprintf(p, "%s/etc/domain.data", getenv("MBSE_ROOT"));
if ((fp = fopen(p, "r")) == NULL) {
WriteError("$Can't open %s", p);
} else {
fread(&domainhdr, sizeof(domainhdr), 1, fp);
while (fread(&domtrans, domainhdr.recsize, 1, fp) == 1) {
q = buf + strlen(buf) - strlen(domtrans.ftndom);
if ((q >= buf) && (strcasecmp(domtrans.ftndom, q) == 0)) {
strcpy(q, domtrans.intdom);
found = TRUE;
break;
}
}
fclose(fp);
}
free(p);
if (!found)
sprintf(buf + strlen(buf), ".ftn");
}
if ((fl & 0x80) && (a->name))
sprintf(buf+strlen(buf),">");
return buf;
}
/*
* Return ASCII string for node, the bits in 'fl' set the
* output format.
*/
char *ascfnode(faddr *a, int fl)
{
static char buf[128];
if (a == NULL) {
strcpy(buf, "<none>");
return buf;
}
buf[0] = '\0';
if ((fl & 0x40) && (a->name))
sprintf(buf+strlen(buf),"%s of ",a->name);
if ((fl & 0x08) && (a->zone))
sprintf(buf+strlen(buf),"%u:",a->zone);
if (fl & 0x04)
sprintf(buf+strlen(buf),"%u/",a->net);
if (fl & 0x02)
sprintf(buf+strlen(buf),"%u",a->node);
if ((fl & 0x01) && (a->point))
sprintf(buf+strlen(buf),".%u",a->point);
if ((fl & 0x10) && (a->domain))
sprintf(buf+strlen(buf),"@%s",a->domain);
return buf;
}
int metric(faddr *a1, faddr *a2)
{
if ((a1->domain != NULL) && (a2->domain != NULL) &&
(strcasecmp(a1->domain,a2->domain) != 0))
return METRIC_DOMAIN;
if ((a1->zone != 0) && (a2->zone != 0) &&
(a1->zone != a2->zone)) return METRIC_ZONE;
if (a1->net != a2->net) return METRIC_NET;
if (a1->node != a2->node) return METRIC_NODE;
if (a1->point != a2->point) return METRIC_POINT;
return METRIC_EQUAL;
}
/*
* Convert mbse style to ifcico style.
*/
faddr *fido2faddr(fidoaddr aka)
{
faddr *fa;
fa = (faddr *)malloc(sizeof(faddr));
fa->name = NULL;
fa->domain = xstrcpy(aka.domain);;
fa->zone = aka.zone;
fa->net = aka.net;
fa->node = aka.node;
fa->point = aka.point;
return fa;
}
/*
* Convert ifcico style to mbse style
*/
fidoaddr *faddr2fido(faddr *aka)
{
fidoaddr *Sys;
Sys = (fidoaddr *)malloc(sizeof(fidoaddr));
memset(Sys, 0, sizeof(Sys));
Sys->zone = aka->zone;
Sys->net = aka->net;
Sys->node = aka->node;
Sys->point = aka->point;
if (aka->domain != NULL)
sprintf(Sys->domain, "%s", aka->domain);
return Sys;
}
faddr *bestaka_s(faddr *addr)
{
faddr *best = NULL, *tmp;
int i, minmetric, wt;
for (i = 0; i < 40; i++) {
if (CFG.akavalid[i]) {
best = fido2faddr(CFG.aka[i]);
break;
}
}
if (addr == NULL)
return best;
minmetric = metric(addr, best);
for (i = 0; i < 40; i++) {
if (CFG.akavalid[i]) {
tmp = fido2faddr(CFG.aka[i]);
wt = metric(addr, tmp);
tidy_faddr(tmp);
if ((wt < minmetric) && ((best->point != 0) || (minmetric > METRIC_NODE))) {
/*
* In the same network, use node address even when
* routing to the node where we have a point address
*/
minmetric = wt;
tidy_faddr(best);
best = fido2faddr(CFG.aka[i]);
}
}
}
return best;
}
int is_local(faddr *addr)
{
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int i;
faddr *tmp;
for (i = 0; i < 40; i++) {
tmp = fido2faddr(CFG.aka[i]);
if ((CFG.akavalid[i]) && (metric(tmp, addr) == METRIC_EQUAL)) {
tidy_faddr(tmp);
return TRUE;
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}
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tidy_faddr(tmp);
}
return FALSE;
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}
int chkftnmsgid(char *msgid)
{
faddr *p;
if (msgid == NULL)
return 0;
while (isspace(*msgid))
msgid++;
if ((p=parsefaddr(msgid))) {
if (p->name && (strspn(p->name,"0123456789") == strlen(p->name)))
return 1;
} else if ((!strncmp(msgid,"<MSGID_",7)) || (!strncmp(msgid,"<NOMSGID_",9)) || (!strncmp(msgid,"<ftn_",5))) {
return 1;
}
return 0;
}