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/* pathalias -- by steve bellovin, as told to peter honeyman */
#ifndef lint
static char *sccsid = "@(#)domain.c 9.5 92/08/25";
static char *rcsid = "@(#)smail/pd/pathalias:RELEASE-3_2_0_102:domain.c,v 1.5 1998/02/15 23:13:29 woods Exp";
#endif /* lint */
#define NEED_SOCKETS /* only for smail-3 */
#include "def.h"
/* imports */
extern dom *newdom();
extern char *strsave();
extern int errno, Vflag;
/* exports */
/* privates */
static dom *good, *bad;
/*
* good and bad are passed by reference for move-to-front
*/
isadomain(domain)
char *domain;
{
if (ondomlist(&good, domain)) {
Vprintf(stderr, "%s on\n", domain);
return 1;
}
if (ondomlist(&bad, domain)) {
Vprintf(stderr, "%s off\n", domain);
return 0;
}
if (nslookup(domain)) {
adddom(&good, domain);
Vprintf(stderr, "%s add\n", domain);
return 1;
} else {
adddom(&bad, domain);
Vprintf(stderr, "%s del\n", domain);
return 0;
}
}
ondomlist(headp, domain)
dom **headp;
char *domain;
{ dom *d, *head = *headp;
for (d = head; d != 0; d = d->next) {
if (strcmp(d->name, domain) == 0) {
if (d != head)
movetofront(headp, d);
return 1;
}
}
return 0;
}
adddom(headp, domain)
dom **headp;
char *domain;
{ dom *d, *head = *headp;
d = newdom();
d->next = head;
d->name = strsave(domain);
if (d->next)
d->next->prev = d;
*headp = d;
}
movetofront(headp, d)
dom **headp, *d;
{ dom *head = *headp;
if (d->prev)
d->prev->next = d->next;
if (d->next)
d->next->prev = d->prev;
if (head)
head->prev = d;
d->next = head;
*headp = d;
}
#ifdef RESOLVER
nslookup(domain)
char *domain;
{ register HEADER *hp;
register int n;
char q[PACKETSZ], a[PACKETSZ]; /* query, answer */
char buf[PACKETSZ+1];
if ((n = strlen(domain)) >= PACKETSZ)
return 0;
strcpy(buf, domain);
if (buf[n-1] != '.') {
buf[n++] = '.';
buf[n] = 0;
}
/*
* LIES! DAMN LIES!
*
* The manual page resolver(3) says arg#7 is (struct rrec *) but the
* prototypes say (const char *), others say (const u_char *).
*
* Note though that res_mkquery() is not used by the rest of
* smail-3 if OBSOLETE_ERSOLVER is defined [XXX use res_search()].
*/
if ((n = res_mkquery(QUERY, buf, C_IN, T_ANY, (unsigned char *) NULL, 0,
(struct rrec *) NULL, (unsigned char *) q,
sizeof(q))) < 0)
die("impossible res_mkquery error");
errno = 0;
if ((n = res_send((unsigned char *) q, n, (unsigned char *) a, sizeof(a))) < 0)
die("res_send");
hp = (HEADER *) a;
if (hp->rcode == NOERROR)
return 1;
return 0;
}
#else /*!RESOLVER*/
/*ARGSUSED*/
nslookup(domain)
char *domain;
{
return 0; /* i guess !?! */
}
#endif /*RESOLVER*/
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