-
-/*
- * mf.c -- mail filter subroutines
+/* mf.c -- mail filter subroutines
*
* This code is Copyright (c) 2002, by the authors of nmh. See the
* COPYRIGHT file in the root directory of the nmh distribution for
* complete copyright information.
*/
+#include <h/mh.h>
#include <h/mf.h>
-#include <ctype.h>
-#include <stdio.h>
#include <h/utils.h>
/*
* static prototypes
*/
-static char *getcpy (char *);
-static void compress (char *, char *);
-static int isat (char *);
+static int isat (const char *);
static int parse_address (void);
static int phrase (char *);
static int route_addr (char *);
static int my_lex (char *);
-static char *
-getcpy (char *s)
-{
- register char *p;
-
- if (!s) {
-/* causes compiles to blow up because the symbol _cleanup is undefined
- where did this ever come from? */
- /* _cleanup(); */
- abort();
- for(;;)
- pause();
- }
- p = mh_xmalloc ((size_t) (strlen (s) + 2));
- strcpy (p, s);
- return p;
-}
-
-
-int
-isfrom(char *string)
-{
- return (strncmp (string, "From ", 5) == 0
- || strncmp (string, ">From ", 6) == 0);
-}
-
-
-int
-lequal (char *a, char *b)
-{
- for (; *a; a++, b++)
- if (*b == 0)
- return FALSE;
- else {
- char c1 = islower ((unsigned char) *a) ?
- toupper ((unsigned char) *a) : *a;
- char c2 = islower ((unsigned char) *b) ?
- toupper ((unsigned char) *b) : *b;
- if (c1 != c2)
- return FALSE;
- }
-
- return (*b == 0);
-}
-
-
-/*
- * seekadrx() is tricky. We want to cover both UUCP-style and ARPA-style
- * addresses, so for each list of addresses we see if we can find some
- * character to give us a hint.
- */
-
-
-#define CHKADR 0 /* undertermined address style */
-#define UNIXDR 1 /* UNIX-style address */
-#define ARPADR 2 /* ARPAnet-style address */
-
-
-static char *punctuators = ";<>.()[]";
-static char *vp = NULL;
-static char *tp = NULL;
-
-static struct adrx adrxs1;
-
-
-struct adrx *
-seekadrx (char *addrs)
-{
- static int state = CHKADR;
- register char *cp;
- register struct adrx *adrxp;
-
- if (state == CHKADR)
- for (state = UNIXDR, cp = addrs; *cp; cp++)
- if (strchr(punctuators, *cp)) {
- state = ARPADR;
- break;
- }
-
- switch (state) {
- case UNIXDR:
- adrxp = uucpadrx (addrs);
- break;
-
- case ARPADR:
- default:
- adrxp = getadrx (addrs);
- break;
- }
-
- if (adrxp == NULL)
- state = CHKADR;
-
- return adrxp;
-}
-
-
-/*
- * uucpadrx() implements a partial UUCP-style address parser. It's based
- * on the UUCP notion that addresses are separated by spaces or commas.
- */
-
-
-struct adrx *
-uucpadrx (char *addrs)
-{
- char *cp, *wp, *xp, *yp, *zp;
- struct adrx *adrxp = &adrxs1;
-
- if (vp == NULL) {
- vp = tp = getcpy (addrs);
- compress (addrs, vp);
- }
- else
- if (tp == NULL) {
- free (vp);
- vp = NULL;
- return NULL;
- }
-
- for (cp = tp; isspace ((unsigned char) *cp); cp++)
- continue;
- if (*cp == 0) {
- free (vp);
- vp = tp = NULL;
- return NULL;
- }
-
- if ((wp = strchr(cp, ',')) == NULL) {
- if ((wp = strchr(cp, ' ')) != NULL) {
- xp = wp;
- while (isspace ((unsigned char) *xp))
- xp++;
- if (*xp != 0 && isat (--xp)) {
- yp = xp + 4;
- while (isspace ((unsigned char) *yp))
- yp++;
- if (*yp != 0) {
- if ((zp = strchr(yp, ' ')) != NULL)
- *zp = 0, tp = ++zp;
- else
- tp = NULL;
- }
- else
- *wp = 0, tp = ++wp;
- }
- else
- *wp = 0, tp = ++wp;
- }
- else
- tp = NULL;
- }
- else
- *wp = 0, tp = ++wp;
-
- if (adrxp->text)
- free (adrxp->text);
- adrxp->text = getcpy (cp);
- adrxp->mbox = cp;
- adrxp->host = adrxp->path = NULL;
- if ((wp = strrchr(cp, '@')) != NULL) {
- *wp++ = 0;
- adrxp->host = *wp ? wp : NULL;
- }
- else
- for (wp = cp + strlen (cp) - 4; wp >= cp; wp--)
- if (isat (wp)) {
- *wp++ = 0;
- adrxp->host = wp + 3;
- }
-
- adrxp->pers = adrxp->grp = adrxp->note = adrxp->err = NULL;
- adrxp->ingrp = 0;
-
- return adrxp;
-}
-
-
-static void
-compress (char *fp, char *tp)
-{
- char c, *cp;
-
- for (c = ' ', cp = tp; (*tp = *fp++) != 0;)
- if (isspace ((unsigned char) *tp)) {
- if (c != ' ')
- *tp++ = c = ' ';
- }
- else
- c = *tp++;
-
- if (c == ' ' && cp < tp)
- *--tp = 0;
-}
-
-
static int
-isat (char *p)
+isat (const char *p)
{
- return (strncmp (p, " AT ", 4)
- && strncmp (p, " At ", 4)
- && strncmp (p, " aT ", 4)
- && strncmp (p, " at ", 4) ? FALSE : TRUE);
+ return *p == ' ' &&
+ (p[1] == 'a' || p[1] == 'A') &&
+ (p[2] == 't' || p[2] == 'T') &&
+ p[3] == ' ';
}
* getadrx() implements a partial 822-style address parser. The parser
* is neither complete nor correct. It does however recognize nearly all
* of the 822 address syntax. In addition it handles the majority of the
- * 733 syntax as well. Most problems arise from trying to accomodate both.
+ * 733 syntax as well. Most problems arise from trying to accommodate both.
*
* In terms of 822, the route-specification in
*
*
*/
-#define QUOTE '\\'
-
#define LX_END 0
#define LX_ERR 1
#define LX_ATOM 2
{ '@', LX_AT },
{ '(', LX_ERR },
{ ')', LX_ERR },
- { QUOTE, LX_ERR },
+ { '\\', LX_ERR },
{ '"', LX_ERR },
{ '[', LX_ERR },
{ ']', LX_ERR },
static char *pers = NULL;
static char *mbox = NULL;
static char *host = NULL;
-static char *path = NULL;
+static char *routepath = NULL;
static char *grp = NULL;
static char *note = NULL;
static char err[BUFSIZ];
static struct adrx adrxs2;
+/* eai = Email Address Internationalization */
struct adrx *
-getadrx (char *addrs)
+getadrx (const char *addrs, int eai)
{
- register char *bp;
- register struct adrx *adrxp = &adrxs2;
-
- if (pers)
- free (pers);
- if (mbox)
- free (mbox);
- if (host)
- free (host);
- if (path)
- free (path);
- if (grp)
- free (grp);
- if (note)
- free (note);
- pers = mbox = host = path = grp = note = NULL;
+ int parse;
+ char *bp;
+ struct adrx *adrxp = &adrxs2;
+
+ free(pers);
+ free(mbox);
+ free(host);
+ free(routepath);
+ free(grp);
+ free(note);
+ pers = mbox = host = routepath = grp = note = NULL;
err[0] = 0;
if (dp == NULL) {
- dp = cp = getcpy (addrs ? addrs : "");
+ dp = cp = strdup (FENDNULL(addrs));
glevel = 0;
+ } else if (cp == NULL) {
+ free (dp);
+ dp = NULL;
+ return NULL;
}
- else
- if (cp == NULL) {
- free (dp);
- dp = NULL;
- return NULL;
- }
-
- switch (parse_address ()) {
- case DONE:
- free (dp);
- dp = cp = NULL;
- return NULL;
- case OK:
- switch (last_lex) {
- case LX_COMA:
- case LX_END:
- break;
+ parse = parse_address();
+ if (parse == DONE) {
+ free(dp);
+ dp = cp = NULL;
+ return NULL;
+ }
+ if (parse == OK && last_lex != LX_COMA && last_lex != LX_END) {
+ /* catch trailing comments */
+ bp = cp;
+ my_lex(adr);
+ cp = bp;
+ }
- default: /* catch trailing comments */
- bp = cp;
- my_lex (adr);
- cp = bp;
- break;
- }
- break;
-
- default:
- break;
- }
+ /* Reject the address if key fields contain 8bit characters. */
+ if (!eai &&
+ (contains8bit(mbox, NULL) || contains8bit(host, NULL) ||
+ contains8bit(routepath, NULL) || contains8bit(grp, NULL)))
+ strcpy(err, "Address contains 8-bit characters");
if (err[0])
- for (;;) {
- switch (last_lex) {
- case LX_COMA:
- case LX_END:
- break;
+ while (last_lex != LX_COMA && last_lex != LX_END)
+ my_lex(adr);
- default:
- my_lex (adr);
- continue;
- }
- break;
- }
while (isspace ((unsigned char) *ap))
ap++;
if (cp)
- sprintf (adr, "%.*s", (int)(cp - ap), ap);
+ snprintf(adr, sizeof adr, "%.*s", (int)(cp - ap), ap);
else
strcpy (adr, ap);
bp = adr + strlen (adr) - 1;
adrxp->pers = pers;
adrxp->mbox = mbox;
adrxp->host = host;
- adrxp->path = path;
+ adrxp->path = routepath;
adrxp->grp = grp;
adrxp->ingrp = ingrp;
adrxp->note = note;
switch (my_lex (buffer)) {
case LX_ATOM:
case LX_QSTR:
- pers = getcpy (buffer);
+ pers = strdup (buffer);
break;
case LX_SEMI:
strcpy (err, "extraneous semi-colon");
return NOTOK;
}
+ /* FALLTHRU */
case LX_COMA:
- if (note) {
- free (note);
- note = NULL;
- }
+ free(note);
+ note = NULL;
goto again;
case LX_END:
return OK; /* why be choosy? */
default:
- sprintf (err, "illegal address construct (%s)", buffer);
+ snprintf(err, sizeof err, "illegal address construct (%s)", buffer);
return NOTOK;
}
return NOTOK;
if (last_lex == LX_RBRK)
return OK;
- sprintf (err, "missing right-bracket (%s)", buffer);
+ snprintf(err, sizeof err, "missing right-bracket (%s)", buffer);
return NOTOK;
case LX_COLN:
get_group: ;
if (glevel++ > 0) {
- sprintf (err, "nested groups not allowed (%s)", pers);
+ snprintf(err, sizeof err, "nested groups not allowed (%s)", pers);
return NOTOK;
}
grp = add (": ", pers);
goto more_phrase;
default:
- sprintf (err, "no mailbox in address, only a phrase (%s%s)",
+ snprintf(err, sizeof err, "no mailbox in address, only a phrase (%s%s)",
pers, buffer);
return NOTOK;
}
strcpy (err, "extraneous semi-colon");
return NOTOK;
}
+ return OK;
case LX_COMA:
case LX_END:
return OK;
default:
- sprintf (err, "junk after local@domain (%s)", buffer);
+ snprintf(err, sizeof err, "junk after local@domain (%s)", buffer);
return NOTOK;
}
return OK;
default:
- sprintf (err, "missing mailbox (%s)", buffer);
+ snprintf(err, sizeof err, "missing mailbox (%s)", buffer);
return NOTOK;
}
}
static int
phrase (char *buffer)
{
- for (;;)
- switch (my_lex (buffer)) {
- case LX_ATOM:
- case LX_QSTR:
- pers = add (buffer, add (" ", pers));
- continue;
+ int lex;
- default:
- return OK;
- }
+ while ((lex = my_lex(buffer)) == LX_ATOM || lex == LX_QSTR)
+ pers = add(buffer, add(" ", pers));
+
+ return OK;
}
static int
route_addr (char *buffer)
{
- register char *pp = cp;
+ char *pp = cp;
if (my_lex (buffer) == LX_AT) {
if (route (buffer) == NOTOK)
return OK;
default:
- sprintf (err, "no at-sign after local-part (%s)", buffer);
+ snprintf(err, sizeof err, "no at-sign after local-part (%s)", buffer);
return NOTOK;
}
}
break;
default:
- sprintf (err, "no mailbox in local-part (%s)", buffer);
+ snprintf(err, sizeof err, "no mailbox in local-part (%s)", buffer);
return NOTOK;
}
break;
default:
- sprintf (err, "no sub-domain in domain-part of address (%s)", buffer);
+ snprintf(err, sizeof err, "no sub-domain in domain-part of address (%s)", buffer);
return NOTOK;
}
static int
route (char *buffer)
{
- path = getcpy ("@");
+ routepath = mh_xstrdup ("@");
for (;;) {
switch (my_lex (buffer)) {
case LX_ATOM:
case LX_DLIT:
- path = add (buffer, path);
+ routepath = add (buffer, routepath);
break;
default:
- sprintf (err, "no sub-domain in domain-part of address (%s)", buffer);
+ snprintf(err, sizeof err, "no sub-domain in domain-part of address (%s)", buffer);
return NOTOK;
}
switch (my_lex (buffer)) {
case LX_COMA:
- path = add (buffer, path);
+ routepath = add (buffer, routepath);
for (;;) {
switch (my_lex (buffer)) {
case LX_COMA:
continue;
case LX_AT:
- path = add (buffer, path);
+ routepath = add (buffer, routepath);
break;
default:
- sprintf (err, "no at-sign found for next domain in route (%s)",
+ snprintf(err, sizeof err, "no at-sign found for next domain in route (%s)",
buffer);
}
break;
case LX_AT: /* XXX */
case LX_DOT:
- path = add (buffer, path);
+ routepath = add (buffer, routepath);
continue;
case LX_COLN:
- path = add (buffer, path);
+ routepath = add (buffer, routepath);
return OK;
default:
- sprintf (err, "no colon found to terminate route (%s)", buffer);
+ snprintf(err, sizeof err, "no colon found to terminate route (%s)", buffer);
return NOTOK;
}
}
bp = buffer;
*bp = 0;
if (!cp)
- return (last_lex = LX_END);
+ return last_lex = LX_END;
gotat = isat (cp);
c = *cp++;
c = *cp++;
if (c == 0) {
cp = NULL;
- return (last_lex = LX_END);
+ return last_lex = LX_END;
}
if (c == '(') {
switch (c = *cp++) {
case 0:
cp = NULL;
- return (last_lex = LX_ERR);
- case QUOTE:
+ return last_lex = LX_ERR;
+ case '\\':
ADDCHR(c);
if ((c = *cp++) == 0) {
cp = NULL;
- return (last_lex = LX_ERR);
+ return last_lex = LX_ERR;
}
ADDCHR(c);
continue;
case '(':
i++;
+ /* FALLTHRU */
default:
ADDCHR(c);
continue;
if (--i < 0) {
*bp = 0;
note = note ? add (buffer, add (" ", note))
- : getcpy (buffer);
+ : strdup (buffer);
return my_lex (buffer);
}
}
switch (c = *cp++) {
case 0:
cp = NULL;
- return (last_lex = LX_ERR);
- case QUOTE:
+ return last_lex = LX_ERR;
+ case '\\':
ADDCHR(c);
if ((c = *cp++) == 0) {
cp = NULL;
- return (last_lex = LX_ERR);
+ return last_lex = LX_ERR;
}
+ /* FALLTHRU */
default:
ADDCHR(c);
continue;
case '"':
ADDCHR(c);
*bp = 0;
- return (last_lex = LX_QSTR);
+ return last_lex = LX_QSTR;
}
}
switch (c = *cp++) {
case 0:
cp = NULL;
- return (last_lex = LX_ERR);
- case QUOTE:
+ return last_lex = LX_ERR;
+ case '\\':
ADDCHR(c);
if ((c = *cp++) == 0) {
cp = NULL;
- return (last_lex = LX_ERR);
+ return last_lex = LX_ERR;
}
+ /* FALLTHRU */
default:
ADDCHR(c);
continue;
case ']':
ADDCHR(c);
*bp = 0;
- return (last_lex = LX_DLIT);
+ return last_lex = LX_DLIT;
}
}
*bp = 0;
for (i = 0; special[i].lx_chr != 0; i++)
if (c == special[i].lx_chr)
- return (last_lex = special[i].lx_val);
+ return last_lex = special[i].lx_val;
if (iscntrl ((unsigned char) c))
- return (last_lex = LX_ERR);
+ return last_lex = LX_ERR;
for (;;) {
if ((c = *cp++) == 0)
my_lex_buffull:
/* Out of buffer space. *bp is the last byte in the buffer */
*bp = 0;
- return (last_lex = LX_ERR);
+ return last_lex = LX_ERR;
}
char *
-legal_person (char *p)
+legal_person (const char *p)
{
int i;
- register char *cp;
+ const char *cp;
static char buffer[BUFSIZ];
if (*p == '"')
- return p;
+ return (char *) p;
for (cp = p; *cp; cp++)
for (i = 0; special[i].lx_chr; i++)
if (*cp == special[i].lx_chr) {
- sprintf (buffer, "\"%s\"", p);
+ snprintf(buffer, sizeof buffer, "\"%s\"", p);
return buffer;
}
- return p;
-}
-
-
-int
-mfgets (FILE *in, char **bp)
-{
- int i;
- register char *cp, *dp, *ep;
- static int len = 0;
- static char *pp = NULL;
-
- if (pp == NULL)
- pp = mh_xmalloc ((size_t) (len = BUFSIZ));
-
- for (ep = (cp = pp) + len - 2;;) {
- switch (i = getc (in)) {
- case EOF:
- eol: ;
- if (cp != pp) {
- *cp = 0;
- *bp = pp;
- return OK;
- }
- eoh: ;
- *bp = NULL;
- free (pp);
- pp = NULL;
- return DONE;
-
- case 0:
- continue;
-
- case '\n':
- if (cp == pp) /* end of headers, gobble it */
- goto eoh;
- switch (i = getc (in)) {
- default: /* end of line */
- case '\n': /* end of headers, save for next call */
- ungetc (i, in);
- goto eol;
-
- case ' ': /* continue headers */
- case '\t':
- *cp++ = '\n';
- break;
- } /* fall into default case */
-
- default:
- *cp++ = i;
- break;
- }
- if (cp >= ep) {
- dp = mh_xrealloc (pp, (size_t) (len += BUFSIZ));
- cp += dp - pp, ep = (pp = cp) + len - 2;
- }
- }
+ return (char *) p;
}
projects / nmh / blobdiff