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ndb/dns: implement caa record type in ndb

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this allows the caa records to be specified
in ndb as:

caa=<value> tag=<tag> flags=<flags>

where tag defaults to "issue" and flags to 0
when omited.
This commit is contained in:
cinap_lenrek 2021-10-24 22:15:26 +00:00
parent c2661f86fc
commit 20cff04fd2
2 changed files with 32 additions and 0 deletions
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7
sys/man/2/ndb
View file

@ -411,6 +411,13 @@ name servers. Returns domain name
.RI ( dom )
and name server
.RI ( ns ).
.TP
.B caa
get the certificate authority records.
Returns the
.RI ( tag )
and
.RI ( flags ).
.PP
.I Ndbfindattr
searches

25
sys/src/cmd/ndb/dblookup.c
View file

@ -41,6 +41,7 @@ static RR* ptrrr(Ndbtuple*, Ndbtuple*);
static RR* soarr(Ndbtuple*, Ndbtuple*);
static RR* srvrr(Ndbtuple*, Ndbtuple*);
static RR* txtrr(Ndbtuple*, Ndbtuple*);
static RR* caarr(Ndbtuple*, Ndbtuple*);
static int implemented[] =
{
@ -54,6 +55,7 @@ static int implemented[] =
[Tsoa] 1,
[Tsrv] 1,
[Ttxt] 1,
[Tcaa] 1,
};
/* straddle server configuration */
@ -258,6 +260,10 @@ dblookup1(char *name, int type, int auth, int ttl)
case Taxfr:
case Tixfr:
return doaxfr(db, name);
case Tcaa:
attr = "caa";
f = caarr;
break;
default:
// dnslog("dblookup1(%s) bad type", name);
return nil;
@ -590,6 +596,23 @@ srvrr(Ndbtuple *entry, Ndbtuple *pair)
return rp;
}
static RR*
caarr(Ndbtuple *entry, Ndbtuple *pair)
{
Ndbtuple *tag;
RR *rp;
rp = rralloc(Tcaa);
rp->caa->flags = intval(entry, pair, "flags", 0);
rp->caa->data = (uchar*)estrdup(pair->val);
rp->caa->dlen = strlen((char*)rp->caa->data);
if((tag = look(entry, pair, "tag")) != nil)
rp->caa->tag = dnlookup(tag->val, Cin, 1);
else
rp->caa->tag = dnlookup("issue", Cin, 1);
return rp;
}
/*
* Look for a pair with the given attribute. look first on the same line,
* then in the whole entry.
@ -655,6 +678,8 @@ dbpair2cache(DN *dp, Ndbtuple *entry, Ndbtuple *pair)
rp = txtrr(entry, pair);
else if(strcmp(pair->attr, "txt") == 0)
rp = txtrr(entry, pair);
else if(strcmp(pair->attr, "caa") == 0)
rp = caarr(entry, pair);
if(rp == nil)
return;