static char *dumpsoa(struct rfc1035_reply *r, struct rfc1035_rr *rr)
{
char name1[RFC1035_MAXNAMESIZE+1], name2[RFC1035_MAXNAMESIZE+1];
char *p;
char timebuf[RFC1035_MAXTIMEBUFSIZE+1];
rfc1035_replyhostname(r, rr->rr.soa.rname_label, name1);
rfc1035_replyhostname(r, rr->rr.soa.mname_label, name2);
p=(char *)malloc(strlen(name1)+strlen(name2)+500);
if (!p) return (0);
strcat(strcat(strcat(strcpy(p, name2), ". "), name1), ". (\n\t\t\t\t");
sprintf(p+strlen(p), "%lu ; serial\n",
(unsigned long)rr->rr.soa.serial);
sprintf(p+strlen(p), "\t\t\t\t%s ; refresh\n",
rfc1035_fmttime( rr->rr.soa.refresh, timebuf));
sprintf(p+strlen(p), "\t\t\t\t%s ; retry\n",
rfc1035_fmttime( rr->rr.soa.retry, timebuf));
sprintf(p+strlen(p), "\t\t\t\t%s ; expire\n",
rfc1035_fmttime( rr->rr.soa.expire, timebuf));
sprintf(p+strlen(p), "\t\t\t\t%s) ; minimum",
rfc1035_fmttime( rr->rr.soa.minimum, timebuf));
return (p);
}
static int domxlistcreate(struct rfc1035_res *res,
const char *q_name, int opts,
struct rfc1035_mxlist **list, int port)
{
char namebuf[RFC1035_MAXNAMESIZE+1];
struct rfc1035_reply *replyp;
int index;
RFC1035_ADDR in;
int seen_softerr=0;
int seen_good=0;
*list=0;
if (rfc1035_aton(q_name, &in) == 0)
return (RFC1035_MX_HARDERR); /* Don't gimme an IP address */
namebuf[0]=0;
strncat(namebuf, q_name, RFC1035_MAXNAMESIZE);
if (namebuf[0] == '[')
{
char *q=strchr(namebuf, ']');
if (!q || q[1]) return (RFC1035_MX_HARDERR); /* Bad addr */
*q=0;
if (rfc1035_aton(namebuf+1, &in))
return (RFC1035_MX_HARDERR);
if (addrecord(list, q_name, -1, &in, port))
return (RFC1035_MX_INTERNAL);
return (RFC1035_MX_OK);
}
index=rfc1035_resolve_cname(res,
RFC1035_RESOLVE_RECURSIVE, namebuf,
RFC1035_TYPE_MX,
RFC1035_CLASS_IN, &replyp, RFC1035_X_RANDOMIZE);
if (index < 0)
{
if (!replyp)
{
if (index == RFC1035_ERR_CNAME_RECURSIVE)
return (RFC1035_MX_BADDNS);
return (RFC1035_MX_INTERNAL);
}
if (replyp->rcode == RFC1035_RCODE_NXDOMAIN ||
replyp->rcode == RFC1035_RCODE_NOERROR)
{
rfc1035_replyfree(replyp);
strcpy(namebuf, q_name);
if (opts & RFC1035_MX_AFALLBACK)
return (add_arecords(res, list, 0, -1,
namebuf, port));
return RFC1035_MX_HARDERR;
}
rfc1035_replyfree(replyp);
return (RFC1035_MX_SOFTERR);
}
for ( ; index >= 0;
index=rfc1035_replysearch_all( res, replyp, namebuf,
RFC1035_TYPE_MX,
RFC1035_CLASS_IN,
index+1))
{
char mxname[RFC1035_MAXNAMESIZE+1];
if (replyp->allrrs[index]->rrtype != RFC1035_TYPE_MX)
continue;
if (rfc1035_replyhostname(replyp,
replyp->allrrs[index]->rr.mx.mx_label, mxname) == 0)
continue;
switch (add_arecords(res, list, replyp,
replyp->allrrs[index]->rr.mx.preference, mxname,
port)) {
case RFC1035_MX_SOFTERR:
seen_softerr=1;
continue;
case RFC1035_MX_INTERNAL:
rfc1035_replyfree(replyp);
return (RFC1035_MX_INTERNAL);
case RFC1035_MX_BADDNS:
rfc1035_replyfree(replyp);
return (RFC1035_MX_BADDNS);
default:
seen_good=1;
continue;
}
}
rfc1035_replyfree(replyp);
if (seen_good && (opts & RFC1035_MX_IGNORESOFTERR))
seen_softerr=0;
/* At least some A records were probably fetched */
if (seen_softerr)
return (RFC1035_MX_SOFTERR);
if (*list) return (RFC1035_MX_OK);
return (RFC1035_MX_HARDERR);
}
char *rfc1035_dumprrdata(struct rfc1035_reply *r, struct rfc1035_rr *rr)
{
if (rr->rrclass != RFC1035_CLASS_IN) return (0);
switch (rr->rrtype) {
case RFC1035_TYPE_A:
{
char ipbuf[RFC1035_NTOABUFSIZE];
rfc1035_ntoa_ipv4(&rr->rr.inaddr, ipbuf);
return (strdup(ipbuf));
}
#if RFC1035_IPV6
case RFC1035_TYPE_AAAA:
{
char ipbuf[INET6_ADDRSTRLEN];
if (inet_ntop(AF_INET6, &rr->rr.in6addr,
ipbuf, sizeof(ipbuf)) == 0)
ipbuf[0]=0;
return (strdup(ipbuf));
}
#endif
case RFC1035_TYPE_TXT:
return (dumptxt(r, rr));
case RFC1035_TYPE_CNAME:
case RFC1035_TYPE_MB:
case RFC1035_TYPE_MG:
case RFC1035_TYPE_MR:
case RFC1035_TYPE_MD:
case RFC1035_TYPE_MF:
case RFC1035_TYPE_NS:
case RFC1035_TYPE_PTR:
{
char p[RFC1035_MAXNAMESIZE+1], *q;
rfc1035_replyhostname(r, rr->rr.domainname, p);
if ((q=(char *)malloc(strlen(p)+2)) != 0)
strcat(strcpy(q, p), ".");
return (q);
}
case RFC1035_TYPE_SOA:
return (dumpsoa(r, rr));
break;
case RFC1035_TYPE_MX:
{
char p[RFC1035_MAXNAMESIZE+1], *q;
rfc1035_replyhostname(r, rr->rr.mx.mx_label, p);
if ((q=(char *)malloc(strlen(p)+40)) != 0)
{
sprintf(q, "%d %s.",
(int)rr->rr.mx.preference, p);
}
return (q);
}
case RFC1035_TYPE_HINFO:
{
char *p=malloc( (int)(unsigned char)*rr->rr.hinfo.hinfo_str+
(int)(unsigned char)*rr->rr.hinfo.os_str+10);
if (p)
{
const char *q=rr->rr.hinfo.hinfo_str;
*p=0;
str_cat(p, &q);
strcat(p, ", ");
q=rr->rr.hinfo.os_str;
str_cat(p, &q);
}
return (p);
}
case RFC1035_TYPE_MINFO:
{
char p[RFC1035_MAXNAMESIZE+1], t[RFC1035_MAXNAMESIZE+1], *q;
rfc1035_replyhostname(r, rr->rr.minfo.rmailbx_label, p);
rfc1035_replyhostname(r, rr->rr.minfo.emailbx_label, t);
if ((q=(char *)malloc(strlen(p)+strlen(t)+4)) == 0)
return (0);
strcat(strcat(strcat(strcpy(q, p), ". "), t), ".");
return (q);
}
case RFC1035_TYPE_RRSIG:
{
time_t now=time(NULL);
size_t n=fmt_rrsig(r, rr, now, NULL);
char *p;
if ((p=malloc(n+1)) == 0)
return (0);
fmt_rrsig(r, rr, now, p);
p[n]=0;
return p;
}
}
return (0);
}
static size_t fmt_rrsig(struct rfc1035_reply *r,
struct rfc1035_rr *rr, time_t now, char *buf)
{
char p[RFC1035_MAXNAMESIZE+1];
char timebuf[RFC1035_MAXTIMEBUFSIZE+1];
time_t signature_inception, signature_expiration;
struct libmail_encode_info lei;
struct fmt_rrsig_info fri;
fri.buf=buf;
fri.n=0;
rfc1035_type_itostr(rr->rr.rrsig.type_covered, tostr_callback, &fri);
append_str(&fri, " ", 1);
append_int32(&fri, rr->rr.rrsig.algorithm);
append_str(&fri, " ", 1);
append_int32(&fri, rr->rr.rrsig.labels);
append_str(&fri, " ", 1);
rfc1035_fmttime(rr->rr.rrsig.original_ttl, timebuf);
append_str(&fri, timebuf, strlen(timebuf));
append_str(&fri, " ", 1);
if (sizeof(time_t) == 4)
{
signature_inception=rr->rr.rrsig.signature_inception;
signature_expiration=rr->rr.rrsig.signature_expiration;
}
else
{
time_t now_epoch=(now & ~0xFFFFFFFFLL);
time_t cur_epoch=now_epoch | rr->rr.rrsig.signature_inception;
time_t prev_epoch=cur_epoch - 0xFFFFFFFF-1;
time_t next_epoch=cur_epoch + 0xFFFFFFFF+1;
#define time2diff(a,b) ((a) < (b) ? (b)-(a):(a)-(b))
#define closest2now(now,time1,time2) \
(time2diff((now), (time1)) < time2diff((now), (time2)) \
? (time1):(time2))
signature_inception =
closest2now(now, closest2now(now,
prev_epoch,
cur_epoch),
next_epoch);
signature_expiration =
signature_inception +
((rr->rr.rrsig.signature_expiration -
rr->rr.rrsig.signature_inception)
& 0x7FFFFFFF);
}
append_time_t(&fri, signature_inception);
append_str(&fri, " ", 1);
append_time_t(&fri, signature_expiration);
append_str(&fri, " ", 1);
append_int32(&fri, rr->rr.rrsig.key_tag);
append_str(&fri, " ", 1);
rfc1035_replyhostname(r, rr->rr.rrsig.signer_name, p);
append_str(&fri, p, strlen(p));
append_str(&fri, ". ", 2);
libmail_encode_start(&lei, "base64", encode_callback_func, &fri);
libmail_encode(&lei, rr->rr.rrsig.signature,
rr->rr.rrsig.signature_len);
libmail_encode_end(&lei);
return fri.n;
}