1035 lines
27 KiB
C
1035 lines
27 KiB
C
/*
|
|
* types.c
|
|
* - RR-type-specific code, and the machinery to call it
|
|
*/
|
|
/*
|
|
* This file is
|
|
* Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
|
|
*
|
|
* It is part of adns, which is
|
|
* Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
|
|
* Copyright (C) 1999 Tony Finch <dot@dotat.at>
|
|
*
|
|
* This program 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.
|
|
*
|
|
* This program 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 this program; if not, write to the Free Software Foundation,
|
|
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
|
|
#include "internal.h"
|
|
|
|
#define R_NOMEM return adns_s_nomemory
|
|
#define CSP_ADDSTR(s) do { if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; } while (0)
|
|
|
|
/*
|
|
* order of sections:
|
|
*
|
|
* _string (pap)
|
|
* _textdata, _qstring (csp)
|
|
* _str (mf,cs)
|
|
* _intstr (mf,csp,cs)
|
|
* _manyistr (mf,cs)
|
|
* _txt (pa)
|
|
* _inaddr (pa,dip,di)
|
|
* _addr (pa,di,csp,cs)
|
|
* _domain (pap)
|
|
* _host_raw (pa)
|
|
* _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs)
|
|
* _mx_raw (pa,di)
|
|
* _mx (pa,di)
|
|
* _inthostaddr (mf,cs)
|
|
* _ptr (pa)
|
|
* _strpair (mf,cs)
|
|
* _intstrpair (mf,cs)
|
|
* _hinfo (pa)
|
|
* _mailbox (pap +pap_mailbox822)
|
|
* _rp (pa)
|
|
* _soa (pa,mf,cs)
|
|
* _flat (mf)
|
|
*
|
|
* within each section:
|
|
* pap_*
|
|
* pa_*
|
|
* dip_*
|
|
* di_*
|
|
* mfp_*
|
|
* mf_*
|
|
* csp_*
|
|
* cs_*
|
|
*/
|
|
|
|
/*
|
|
* _qstring (pap,csp)
|
|
*/
|
|
|
|
static adns_status pap_qstring(const parseinfo *pai, int *cbyte_io, int max,
|
|
int *len_r, char **str_r) {
|
|
/* Neither len_r nor str_r may be null.
|
|
* End of datagram (overrun) is indicated by returning adns_s_invaliddata;
|
|
*/
|
|
const byte *dgram= pai->dgram;
|
|
int l, cbyte;
|
|
char *str;
|
|
|
|
cbyte= *cbyte_io;
|
|
|
|
if (cbyte >= max) return adns_s_invaliddata;
|
|
GET_B(cbyte,l);
|
|
if (cbyte+l > max) return adns_s_invaliddata;
|
|
|
|
str= adns__alloc_interim(pai->qu, l+1);
|
|
if (!str) R_NOMEM;
|
|
|
|
str[l]= 0;
|
|
memcpy(str,dgram+cbyte,l);
|
|
|
|
*len_r= l;
|
|
*str_r= str;
|
|
*cbyte_io= cbyte+l;
|
|
|
|
return adns_s_ok;
|
|
}
|
|
|
|
static adns_status csp_qstring(vbuf *vb, const char *dp, int len) {
|
|
unsigned char ch;
|
|
char buf[10];
|
|
int cn;
|
|
|
|
CSP_ADDSTR("\"");
|
|
for (cn=0; cn<len; cn++) {
|
|
ch= *dp++;
|
|
if (ch == '\\') {
|
|
CSP_ADDSTR("\\\\");
|
|
} else if (ch == '"') {
|
|
CSP_ADDSTR("\\\"");
|
|
} else if (ch >= 32 && ch <= 126) {
|
|
if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM;
|
|
} else {
|
|
sprintf(buf,"\\x%02x",ch);
|
|
CSP_ADDSTR(buf);
|
|
}
|
|
}
|
|
CSP_ADDSTR("\"");
|
|
|
|
return adns_s_ok;
|
|
}
|
|
|
|
/*
|
|
* _str (mf)
|
|
*/
|
|
|
|
static void mf_str(adns_query qu, void *datap) {
|
|
char **rrp= datap;
|
|
|
|
adns__makefinal_str(qu,rrp);
|
|
}
|
|
|
|
/*
|
|
* _intstr (mf)
|
|
*/
|
|
|
|
static void mf_intstr(adns_query qu, void *datap) {
|
|
adns_rr_intstr *rrp= datap;
|
|
|
|
adns__makefinal_str(qu,&rrp->str);
|
|
}
|
|
|
|
/*
|
|
* _manyistr (mf)
|
|
*/
|
|
|
|
static void mf_manyistr(adns_query qu, void *datap) {
|
|
adns_rr_intstr **rrp= datap;
|
|
adns_rr_intstr *te, *table;
|
|
void *tablev;
|
|
int tc;
|
|
|
|
for (tc=0, te= *rrp; te->i >= 0; te++, tc++);
|
|
tablev= *rrp;
|
|
adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1));
|
|
*rrp= table= tablev;
|
|
for (te= *rrp; te->i >= 0; te++)
|
|
adns__makefinal_str(qu,&te->str);
|
|
}
|
|
|
|
/*
|
|
* _txt (pa,cs)
|
|
*/
|
|
|
|
static adns_status pa_txt(const parseinfo *pai, int cbyte, int max, void *datap) {
|
|
adns_rr_intstr **rrp= datap, *table, *te;
|
|
const byte *dgram= pai->dgram;
|
|
int ti, tc, l, startbyte;
|
|
adns_status st;
|
|
|
|
startbyte= cbyte;
|
|
if (cbyte >= max) return adns_s_invaliddata;
|
|
tc= 0;
|
|
while (cbyte < max) {
|
|
GET_B(cbyte,l);
|
|
cbyte+= l;
|
|
tc++;
|
|
}
|
|
if (cbyte != max || !tc) return adns_s_invaliddata;
|
|
|
|
table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1));
|
|
if (!table) R_NOMEM;
|
|
|
|
for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) {
|
|
st= pap_qstring(pai, &cbyte, max, &te->i, &te->str);
|
|
if (st) return st;
|
|
}
|
|
assert(cbyte == max);
|
|
|
|
te->i= -1;
|
|
te->str= 0;
|
|
|
|
*rrp= table;
|
|
return adns_s_ok;
|
|
}
|
|
|
|
static adns_status cs_txt(vbuf *vb, const void *datap) {
|
|
const adns_rr_intstr *const *rrp= datap;
|
|
const adns_rr_intstr *current;
|
|
adns_status st;
|
|
int spc;
|
|
|
|
for (current= *rrp, spc=0; current->i >= 0; current++, spc=1) {
|
|
if (spc) CSP_ADDSTR(" ");
|
|
st= csp_qstring(vb,current->str,current->i); if (st) return st;
|
|
}
|
|
return adns_s_ok;
|
|
}
|
|
|
|
/*
|
|
* _hinfo (cs)
|
|
*/
|
|
|
|
static adns_status cs_hinfo(vbuf *vb, const void *datap) {
|
|
const adns_rr_intstrpair *rrp= datap;
|
|
adns_status st;
|
|
|
|
st= csp_qstring(vb,rrp->array[0].str,rrp->array[0].i); if (st) return st;
|
|
CSP_ADDSTR(" ");
|
|
st= csp_qstring(vb,rrp->array[1].str,rrp->array[1].i); if (st) return st;
|
|
return adns_s_ok;
|
|
}
|
|
|
|
/*
|
|
* _inaddr (pa,dip,di)
|
|
*/
|
|
|
|
static adns_status pa_inaddr(const parseinfo *pai, int cbyte, int max, void *datap) {
|
|
struct in_addr *storeto= datap;
|
|
|
|
if (max-cbyte != 4) return adns_s_invaliddata;
|
|
memcpy(storeto, pai->dgram + cbyte, 4);
|
|
return adns_s_ok;
|
|
}
|
|
|
|
static int search_sortlist(adns_state ads, struct in_addr ad) {
|
|
const struct sortlist *slp;
|
|
int i;
|
|
|
|
for (i=0, slp=ads->sortlist;
|
|
i<ads->nsortlist && !((ad.s_addr & slp->mask.s_addr) == slp->base.s_addr);
|
|
i++, slp++);
|
|
return i;
|
|
}
|
|
|
|
static int dip_inaddr(adns_state ads, struct in_addr a, struct in_addr b) {
|
|
int ai, bi;
|
|
|
|
if (!ads->nsortlist) return 0;
|
|
|
|
ai= search_sortlist(ads,a);
|
|
bi= search_sortlist(ads,b);
|
|
return bi<ai;
|
|
}
|
|
|
|
static int di_inaddr(adns_state ads, const void *datap_a, const void *datap_b) {
|
|
const struct in_addr *ap= datap_a, *bp= datap_b;
|
|
|
|
return dip_inaddr(ads,*ap,*bp);
|
|
}
|
|
|
|
static adns_status cs_inaddr(vbuf *vb, const void *datap) {
|
|
const struct in_addr *rrp= datap, rr= *rrp;
|
|
const char *ia;
|
|
|
|
ia= inet_ntoa(rr); assert(ia);
|
|
CSP_ADDSTR(ia);
|
|
return adns_s_ok;
|
|
}
|
|
|
|
/*
|
|
* _addr (pa,di,csp,cs)
|
|
*/
|
|
|
|
static adns_status pa_addr(const parseinfo *pai, int cbyte, int max, void *datap) {
|
|
adns_rr_addr *storeto= datap;
|
|
const byte *dgram= pai->dgram;
|
|
|
|
if (max-cbyte != 4) return adns_s_invaliddata;
|
|
storeto->len= sizeof(storeto->addr.inet);
|
|
memset(&storeto->addr,0,sizeof(storeto->addr.inet));
|
|
storeto->addr.inet.sin_family= AF_INET;
|
|
memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4);
|
|
return adns_s_ok;
|
|
}
|
|
|
|
static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) {
|
|
const adns_rr_addr *ap= datap_a, *bp= datap_b;
|
|
|
|
assert(ap->addr.sa.sa_family == AF_INET);
|
|
return dip_inaddr(ads, ap->addr.inet.sin_addr, bp->addr.inet.sin_addr);
|
|
}
|
|
|
|
static int div_addr(void *context, const void *datap_a, const void *datap_b) {
|
|
const adns_state ads= context;
|
|
|
|
return di_addr(ads, datap_a, datap_b);
|
|
}
|
|
|
|
static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) {
|
|
const char *ia;
|
|
static char buf[30];
|
|
|
|
switch (rrp->addr.inet.sin_family) {
|
|
case AF_INET:
|
|
CSP_ADDSTR("INET ");
|
|
ia= inet_ntoa(rrp->addr.inet.sin_addr); assert(ia);
|
|
CSP_ADDSTR(ia);
|
|
break;
|
|
default:
|
|
sprintf(buf,"AF=%u",rrp->addr.sa.sa_family);
|
|
CSP_ADDSTR(buf);
|
|
break;
|
|
}
|
|
return adns_s_ok;
|
|
}
|
|
|
|
static adns_status cs_addr(vbuf *vb, const void *datap) {
|
|
const adns_rr_addr *rrp= datap;
|
|
|
|
return csp_addr(vb,rrp);
|
|
}
|
|
|
|
/*
|
|
* _domain (pap,csp,cs)
|
|
* _dom_raw (pa)
|
|
*/
|
|
|
|
static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max,
|
|
char **domain_r, parsedomain_flags flags) {
|
|
adns_status st;
|
|
char *dm;
|
|
|
|
st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags,
|
|
pai->dgram,pai->dglen, cbyte_io, max);
|
|
if (st) return st;
|
|
if (!pai->qu->vb.used) return adns_s_invaliddata;
|
|
|
|
dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1);
|
|
if (!dm) R_NOMEM;
|
|
|
|
dm[pai->qu->vb.used]= 0;
|
|
memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used);
|
|
|
|
*domain_r= dm;
|
|
return adns_s_ok;
|
|
}
|
|
|
|
static adns_status csp_domain(vbuf *vb, const char *domain) {
|
|
CSP_ADDSTR(domain);
|
|
if (!*domain) CSP_ADDSTR(".");
|
|
return adns_s_ok;
|
|
}
|
|
|
|
static adns_status cs_domain(vbuf *vb, const void *datap) {
|
|
const char *const *domainp= datap;
|
|
return csp_domain(vb,*domainp);
|
|
}
|
|
|
|
static adns_status pa_dom_raw(const parseinfo *pai, int cbyte, int max, void *datap) {
|
|
char **rrp= datap;
|
|
adns_status st;
|
|
|
|
st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok);
|
|
if (st) return st;
|
|
|
|
if (cbyte != max) return adns_s_invaliddata;
|
|
return adns_s_ok;
|
|
}
|
|
|
|
/*
|
|
* _host_raw (pa)
|
|
*/
|
|
|
|
static adns_status pa_host_raw(const parseinfo *pai, int cbyte, int max, void *datap) {
|
|
char **rrp= datap;
|
|
adns_status st;
|
|
|
|
st= pap_domain(pai, &cbyte, max, rrp,
|
|
pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
|
|
if (st) return st;
|
|
|
|
if (cbyte != max) return adns_s_invaliddata;
|
|
return adns_s_ok;
|
|
}
|
|
|
|
/*
|
|
* _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs)
|
|
*/
|
|
|
|
static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha,
|
|
int *cbyte_io, int count, int dmstart) {
|
|
int rri, naddrs;
|
|
int type, class, rdlen, rdstart, ownermatched;
|
|
unsigned long ttl;
|
|
adns_status st;
|
|
|
|
for (rri=0, naddrs=-1; rri<count; rri++) {
|
|
st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram, pai->dglen, cbyte_io,
|
|
&type, &class, &ttl, &rdlen, &rdstart,
|
|
pai->dgram, pai->dglen, dmstart, &ownermatched);
|
|
if (st) return st;
|
|
if (!ownermatched || class != DNS_CLASS_IN || type != adns_r_a) {
|
|
if (naddrs>0) break; else continue;
|
|
}
|
|
if (naddrs == -1) {
|
|
naddrs= 0;
|
|
}
|
|
if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*sizeof(adns_rr_addr))) R_NOMEM;
|
|
adns__update_expires(pai->qu,ttl,pai->now);
|
|
st= pa_addr(pai, rdstart,rdstart+rdlen,
|
|
pai->qu->vb.buf + naddrs*sizeof(adns_rr_addr));
|
|
if (st) return st;
|
|
naddrs++;
|
|
}
|
|
if (naddrs >= 0) {
|
|
ha->addrs= adns__alloc_interim(pai->qu, naddrs*sizeof(adns_rr_addr));
|
|
if (!ha->addrs) R_NOMEM;
|
|
memcpy(ha->addrs, pai->qu->vb.buf, naddrs*sizeof(adns_rr_addr));
|
|
ha->naddrs= naddrs;
|
|
ha->astatus= adns_s_ok;
|
|
|
|
adns__isort(ha->addrs, naddrs, sizeof(adns_rr_addr), pai->qu->vb.buf,
|
|
div_addr, pai->ads);
|
|
}
|
|
return adns_s_ok;
|
|
}
|
|
|
|
static void icb_hostaddr(adns_query parent, adns_query child) {
|
|
adns_answer *cans= child->answer;
|
|
adns_rr_hostaddr *rrp= child->ctx.info.hostaddr;
|
|
adns_state ads= parent->ads;
|
|
adns_status st;
|
|
|
|
st= cans->status;
|
|
rrp->astatus= st;
|
|
rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : cans->nrrs;
|
|
rrp->addrs= cans->rrs.addr;
|
|
adns__transfer_interim(child, parent, rrp->addrs, rrp->naddrs*sizeof(adns_rr_addr));
|
|
|
|
if (parent->children.head) {
|
|
LIST_LINK_TAIL(ads->childw,parent);
|
|
} else {
|
|
adns__query_done(parent);
|
|
}
|
|
}
|
|
|
|
static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io,
|
|
int max, adns_rr_hostaddr *rrp) {
|
|
adns_status st;
|
|
int dmstart, cbyte;
|
|
qcontext ctx;
|
|
int id;
|
|
adns_query nqu;
|
|
adns_queryflags nflags;
|
|
|
|
dmstart= cbyte= *cbyte_io;
|
|
st= pap_domain(pai, &cbyte, max, &rrp->host,
|
|
pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
|
|
if (st) return st;
|
|
*cbyte_io= cbyte;
|
|
|
|
rrp->astatus= adns_s_ok;
|
|
rrp->naddrs= -1;
|
|
rrp->addrs= 0;
|
|
|
|
cbyte= pai->nsstart;
|
|
|
|
st= pap_findaddrs(pai, rrp, &cbyte, pai->nscount, dmstart);
|
|
if (st) return st;
|
|
if (rrp->naddrs != -1) return adns_s_ok;
|
|
|
|
st= pap_findaddrs(pai, rrp, &cbyte, pai->arcount, dmstart);
|
|
if (st) return st;
|
|
if (rrp->naddrs != -1) return adns_s_ok;
|
|
|
|
st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
|
|
pai->dgram, pai->dglen, dmstart,
|
|
adns_r_addr, adns_qf_quoteok_query);
|
|
if (st) return st;
|
|
|
|
ctx.ext= 0;
|
|
ctx.callback= icb_hostaddr;
|
|
ctx.info.hostaddr= rrp;
|
|
|
|
nflags= adns_qf_quoteok_query;
|
|
if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid;
|
|
|
|
st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr),
|
|
&pai->qu->vb, id, nflags, pai->now, &ctx);
|
|
if (st) return st;
|
|
|
|
nqu->parent= pai->qu;
|
|
LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
|
|
|
|
return adns_s_ok;
|
|
}
|
|
|
|
static adns_status pa_hostaddr(const parseinfo *pai, int cbyte, int max, void *datap) {
|
|
adns_rr_hostaddr *rrp= datap;
|
|
adns_status st;
|
|
|
|
st= pap_hostaddr(pai, &cbyte, max, rrp);
|
|
if (st) return st;
|
|
if (cbyte != max) return adns_s_invaliddata;
|
|
|
|
return adns_s_ok;
|
|
}
|
|
|
|
static int dip_hostaddr(adns_state ads, const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) {
|
|
if (ap->astatus != bp->astatus) return ap->astatus;
|
|
if (ap->astatus) return 0;
|
|
|
|
assert(ap->addrs[0].addr.sa.sa_family == AF_INET);
|
|
assert(bp->addrs[0].addr.sa.sa_family == AF_INET);
|
|
return dip_inaddr(ads,
|
|
ap->addrs[0].addr.inet.sin_addr,
|
|
bp->addrs[0].addr.inet.sin_addr);
|
|
}
|
|
|
|
static int di_hostaddr(adns_state ads, const void *datap_a, const void *datap_b) {
|
|
const adns_rr_hostaddr *ap= datap_a, *bp= datap_b;
|
|
|
|
return dip_hostaddr(ads, ap,bp);
|
|
}
|
|
|
|
static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) {
|
|
void *tablev;
|
|
|
|
adns__makefinal_str(qu,&rrp->host);
|
|
tablev= rrp->addrs;
|
|
adns__makefinal_block(qu, &tablev, rrp->naddrs*sizeof(*rrp->addrs));
|
|
rrp->addrs= tablev;
|
|
}
|
|
|
|
static void mf_hostaddr(adns_query qu, void *datap) {
|
|
adns_rr_hostaddr *rrp= datap;
|
|
|
|
mfp_hostaddr(qu,rrp);
|
|
}
|
|
|
|
static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) {
|
|
const char *errstr;
|
|
adns_status st;
|
|
char buf[20];
|
|
int i;
|
|
|
|
st= csp_domain(vb,rrp->host); if (st) return st;
|
|
|
|
CSP_ADDSTR(" ");
|
|
CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus));
|
|
|
|
sprintf(buf," %d ",rrp->astatus);
|
|
CSP_ADDSTR(buf);
|
|
|
|
CSP_ADDSTR(adns_errabbrev(rrp->astatus));
|
|
CSP_ADDSTR(" ");
|
|
|
|
errstr= adns_strerror(rrp->astatus);
|
|
st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st;
|
|
|
|
if (rrp->naddrs >= 0) {
|
|
CSP_ADDSTR(" (");
|
|
for (i=0; i<rrp->naddrs; i++) {
|
|
CSP_ADDSTR(" ");
|
|
st= csp_addr(vb,&rrp->addrs[i]);
|
|
}
|
|
CSP_ADDSTR(" )");
|
|
} else {
|
|
CSP_ADDSTR(" ?");
|
|
}
|
|
return adns_s_ok;
|
|
}
|
|
|
|
static adns_status cs_hostaddr(vbuf *vb, const void *datap) {
|
|
const adns_rr_hostaddr *rrp= datap;
|
|
|
|
return csp_hostaddr(vb,rrp);
|
|
}
|
|
|
|
/*
|
|
* _mx_raw (pa,di)
|
|
*/
|
|
|
|
static adns_status pa_mx_raw(const parseinfo *pai, int cbyte, int max, void *datap) {
|
|
const byte *dgram= pai->dgram;
|
|
adns_rr_intstr *rrp= datap;
|
|
adns_status st;
|
|
int pref;
|
|
|
|
if (cbyte+2 > max) return adns_s_invaliddata;
|
|
GET_W(cbyte,pref);
|
|
rrp->i= pref;
|
|
st= pap_domain(pai, &cbyte, max, &rrp->str,
|
|
pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
|
|
if (st) return st;
|
|
|
|
if (cbyte != max) return adns_s_invaliddata;
|
|
return adns_s_ok;
|
|
}
|
|
|
|
static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) {
|
|
const adns_rr_intstr *ap= datap_a, *bp= datap_b;
|
|
|
|
if (ap->i < bp->i) return 0;
|
|
if (ap->i > bp->i) return 1;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* _mx (pa,di)
|
|
*/
|
|
|
|
static adns_status pa_mx(const parseinfo *pai, int cbyte, int max, void *datap) {
|
|
const byte *dgram= pai->dgram;
|
|
adns_rr_inthostaddr *rrp= datap;
|
|
adns_status st;
|
|
int pref;
|
|
|
|
if (cbyte+2 > max) return adns_s_invaliddata;
|
|
GET_W(cbyte,pref);
|
|
rrp->i= pref;
|
|
st= pap_hostaddr(pai, &cbyte, max, &rrp->ha);
|
|
if (st) return st;
|
|
|
|
if (cbyte != max) return adns_s_invaliddata;
|
|
return adns_s_ok;
|
|
}
|
|
|
|
static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) {
|
|
const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b;
|
|
|
|
if (ap->i < bp->i) return 0;
|
|
if (ap->i > bp->i) return 1;
|
|
return dip_hostaddr(ads, &ap->ha, &bp->ha);
|
|
}
|
|
|
|
/*
|
|
* _inthostaddr (mf,cs)
|
|
*/
|
|
|
|
static void mf_inthostaddr(adns_query qu, void *datap) {
|
|
adns_rr_inthostaddr *rrp= datap;
|
|
|
|
mfp_hostaddr(qu,&rrp->ha);
|
|
}
|
|
|
|
static adns_status cs_inthostaddr(vbuf *vb, const void *datap) {
|
|
const adns_rr_inthostaddr *rrp= datap;
|
|
char buf[10];
|
|
|
|
sprintf(buf,"%u ",rrp->i);
|
|
CSP_ADDSTR(buf);
|
|
|
|
return csp_hostaddr(vb,&rrp->ha);
|
|
}
|
|
|
|
/*
|
|
* _inthost (cs)
|
|
*/
|
|
|
|
static adns_status cs_inthost(vbuf *vb, const void *datap) {
|
|
const adns_rr_intstr *rrp= datap;
|
|
char buf[10];
|
|
|
|
sprintf(buf,"%u ",rrp->i);
|
|
CSP_ADDSTR(buf);
|
|
return csp_domain(vb,rrp->str);
|
|
}
|
|
|
|
/*
|
|
* _ptr (pa, +icb_ptr)
|
|
*/
|
|
|
|
static void icb_ptr(adns_query parent, adns_query child) {
|
|
adns_answer *cans= child->answer;
|
|
const adns_rr_addr *queried, *found;
|
|
adns_state ads= parent->ads;
|
|
int i;
|
|
|
|
if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) {
|
|
adns__query_fail(parent,adns_s_inconsistent);
|
|
return;
|
|
} else if (cans->status) {
|
|
adns__query_fail(parent,cans->status);
|
|
return;
|
|
}
|
|
|
|
queried= &parent->ctx.info.ptr_parent_addr;
|
|
for (i=0, found=cans->rrs.addr; i<cans->nrrs; i++, found++) {
|
|
if (queried->len == found->len &&
|
|
!memcmp(&queried->addr,&found->addr,queried->len)) {
|
|
if (!parent->children.head) {
|
|
adns__query_done(parent);
|
|
return;
|
|
} else {
|
|
LIST_LINK_TAIL(ads->childw,parent);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
adns__query_fail(parent,adns_s_inconsistent);
|
|
}
|
|
|
|
static adns_status pa_ptr(const parseinfo *pai, int dmstart, int max, void *datap) {
|
|
static const char *(expectdomain[])= { DNS_INADDR_ARPA };
|
|
|
|
char **rrp= datap;
|
|
adns_status st;
|
|
adns_rr_addr *ap;
|
|
findlabel_state fls;
|
|
char *ep;
|
|
byte ipv[4];
|
|
char labbuf[4];
|
|
int cbyte, i, lablen, labstart, l, id;
|
|
adns_query nqu;
|
|
qcontext ctx;
|
|
|
|
cbyte= dmstart;
|
|
st= pap_domain(pai, &cbyte, max, rrp,
|
|
pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
|
|
if (st) return st;
|
|
if (cbyte != max) return adns_s_invaliddata;
|
|
|
|
ap= &pai->qu->ctx.info.ptr_parent_addr;
|
|
if (!ap->len) {
|
|
adns__findlabel_start(&fls, pai->ads, -1, pai->qu,
|
|
pai->qu->query_dgram, pai->qu->query_dglen,
|
|
pai->qu->query_dglen, DNS_HDRSIZE, 0);
|
|
for (i=0; i<4; i++) {
|
|
st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st);
|
|
if (lablen<=0 || lablen>3) return adns_s_querydomainwrong;
|
|
memcpy(labbuf, pai->qu->query_dgram + labstart, lablen); labbuf[lablen]= 0;
|
|
ipv[3-i]= strtoul(labbuf,&ep,10); if (*ep) return adns_s_querydomainwrong;
|
|
if (lablen>1 && pai->qu->query_dgram[labstart]=='0')
|
|
return adns_s_querydomainwrong;
|
|
}
|
|
for (i=0; i<sizeof(expectdomain)/sizeof(*expectdomain); i++) {
|
|
st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st);
|
|
l= strlen(expectdomain[i]);
|
|
if (lablen != l || memcmp(pai->qu->query_dgram + labstart, expectdomain[i], l))
|
|
return adns_s_querydomainwrong;
|
|
}
|
|
st= adns__findlabel_next(&fls,&lablen,0); assert(!st);
|
|
if (lablen) return adns_s_querydomainwrong;
|
|
|
|
ap->len= sizeof(struct sockaddr_in);
|
|
memset(&ap->addr,0,sizeof(ap->addr.inet));
|
|
ap->addr.inet.sin_family= AF_INET;
|
|
ap->addr.inet.sin_addr.s_addr=
|
|
htonl((ipv[0]<<24) | (ipv[1]<<16) | (ipv[2]<<8) | (ipv[3]));
|
|
}
|
|
|
|
st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
|
|
pai->dgram, pai->dglen, dmstart,
|
|
adns_r_addr, adns_qf_quoteok_query);
|
|
if (st) return st;
|
|
|
|
ctx.ext= 0;
|
|
ctx.callback= icb_ptr;
|
|
memset(&ctx.info,0,sizeof(ctx.info));
|
|
st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr),
|
|
&pai->qu->vb, id,
|
|
adns_qf_quoteok_query, pai->now, &ctx);
|
|
if (st) return st;
|
|
|
|
nqu->parent= pai->qu;
|
|
LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
|
|
return adns_s_ok;
|
|
}
|
|
|
|
/*
|
|
* _strpair (mf)
|
|
*/
|
|
|
|
static void mf_strpair(adns_query qu, void *datap) {
|
|
adns_rr_strpair *rrp= datap;
|
|
|
|
adns__makefinal_str(qu,&rrp->array[0]);
|
|
adns__makefinal_str(qu,&rrp->array[1]);
|
|
}
|
|
|
|
/*
|
|
* _intstrpair (mf)
|
|
*/
|
|
|
|
static void mf_intstrpair(adns_query qu, void *datap) {
|
|
adns_rr_intstrpair *rrp= datap;
|
|
|
|
adns__makefinal_str(qu,&rrp->array[0].str);
|
|
adns__makefinal_str(qu,&rrp->array[1].str);
|
|
}
|
|
|
|
/*
|
|
* _hinfo (pa)
|
|
*/
|
|
|
|
static adns_status pa_hinfo(const parseinfo *pai, int cbyte, int max, void *datap) {
|
|
adns_rr_intstrpair *rrp= datap;
|
|
adns_status st;
|
|
int i;
|
|
|
|
for (i=0; i<2; i++) {
|
|
st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str);
|
|
if (st) return st;
|
|
}
|
|
|
|
if (cbyte != max) return adns_s_invaliddata;
|
|
|
|
return adns_s_ok;
|
|
}
|
|
|
|
/*
|
|
* _mailbox (pap,cs)
|
|
*/
|
|
|
|
static adns_status pap_mailbox822(const parseinfo *pai, int *cbyte_io, int max,
|
|
char **mb_r) {
|
|
int lablen, labstart, i, needquote, c, r, neednorm;
|
|
const unsigned char *p;
|
|
char *str;
|
|
findlabel_state fls;
|
|
adns_status st;
|
|
vbuf *vb;
|
|
|
|
vb= &pai->qu->vb;
|
|
vb->used= 0;
|
|
adns__findlabel_start(&fls, pai->ads,
|
|
-1, pai->qu,
|
|
pai->dgram, pai->dglen, max,
|
|
*cbyte_io, cbyte_io);
|
|
st= adns__findlabel_next(&fls,&lablen,&labstart);
|
|
if (!lablen) {
|
|
adns__vbuf_appendstr(vb,".");
|
|
goto x_ok;
|
|
}
|
|
|
|
neednorm= 1;
|
|
for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) {
|
|
c= *p++;
|
|
if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata;
|
|
if (c == '.' && !neednorm) neednorm= 1;
|
|
else if (c==' ' || ctype_822special(c)) needquote++;
|
|
else neednorm= 0;
|
|
}
|
|
|
|
if (needquote || neednorm) {
|
|
r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM;
|
|
adns__vbuf_appendq(vb,"\"",1);
|
|
for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) {
|
|
c= *p;
|
|
if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1);
|
|
adns__vbuf_appendq(vb,p,1);
|
|
}
|
|
adns__vbuf_appendq(vb,"\"",1);
|
|
} else {
|
|
r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM;
|
|
}
|
|
|
|
r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM;
|
|
|
|
st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram);
|
|
if (st) return st;
|
|
|
|
x_ok:
|
|
str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM;
|
|
memcpy(str,vb->buf,vb->used);
|
|
str[vb->used]= 0;
|
|
*mb_r= str;
|
|
return adns_s_ok;
|
|
}
|
|
|
|
static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max,
|
|
char **mb_r) {
|
|
if (pai->qu->typei->type & adns__qtf_mail822) {
|
|
return pap_mailbox822(pai, cbyte_io, max, mb_r);
|
|
} else {
|
|
return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok);
|
|
}
|
|
}
|
|
|
|
static adns_status csp_mailbox(vbuf *vb, const char *mailbox) {
|
|
return csp_domain(vb,mailbox);
|
|
}
|
|
|
|
/*
|
|
* _rp (pa,cs)
|
|
*/
|
|
|
|
static adns_status pa_rp(const parseinfo *pai, int cbyte, int max, void *datap) {
|
|
adns_rr_strpair *rrp= datap;
|
|
adns_status st;
|
|
|
|
st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]);
|
|
if (st) return st;
|
|
|
|
st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok);
|
|
if (st) return st;
|
|
|
|
if (cbyte != max) return adns_s_invaliddata;
|
|
return adns_s_ok;
|
|
}
|
|
|
|
static adns_status cs_rp(vbuf *vb, const void *datap) {
|
|
const adns_rr_strpair *rrp= datap;
|
|
adns_status st;
|
|
|
|
st= csp_mailbox(vb,rrp->array[0]); if (st) return st;
|
|
CSP_ADDSTR(" ");
|
|
st= csp_domain(vb,rrp->array[1]); if (st) return st;
|
|
|
|
return adns_s_ok;
|
|
}
|
|
|
|
/*
|
|
* _soa (pa,mf,cs)
|
|
*/
|
|
|
|
static adns_status pa_soa(const parseinfo *pai, int cbyte, int max, void *datap) {
|
|
adns_rr_soa *rrp= datap;
|
|
const byte *dgram= pai->dgram;
|
|
adns_status st;
|
|
int msw, lsw, i;
|
|
|
|
st= pap_domain(pai, &cbyte, max, &rrp->mname,
|
|
pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
|
|
if (st) return st;
|
|
|
|
st= pap_mailbox(pai, &cbyte, max, &rrp->rname);
|
|
if (st) return st;
|
|
|
|
if (cbyte+20 != max) return adns_s_invaliddata;
|
|
|
|
for (i=0; i<5; i++) {
|
|
GET_W(cbyte,msw);
|
|
GET_W(cbyte,lsw);
|
|
(&rrp->serial)[i]= (msw<<16) | lsw;
|
|
}
|
|
|
|
return adns_s_ok;
|
|
}
|
|
|
|
static void mf_soa(adns_query qu, void *datap) {
|
|
adns_rr_soa *rrp= datap;
|
|
|
|
adns__makefinal_str(qu,&rrp->mname);
|
|
adns__makefinal_str(qu,&rrp->rname);
|
|
}
|
|
|
|
static adns_status cs_soa(vbuf *vb, const void *datap) {
|
|
const adns_rr_soa *rrp= datap;
|
|
char buf[20];
|
|
int i;
|
|
adns_status st;
|
|
|
|
st= csp_domain(vb,rrp->mname); if (st) return st;
|
|
CSP_ADDSTR(" ");
|
|
st= csp_mailbox(vb,rrp->rname); if (st) return st;
|
|
|
|
for (i=0; i<5; i++) {
|
|
sprintf(buf," %lu",(&rrp->serial)[i]);
|
|
CSP_ADDSTR(buf);
|
|
}
|
|
|
|
return adns_s_ok;
|
|
}
|
|
|
|
/*
|
|
* _flat (mf)
|
|
*/
|
|
|
|
static void mf_flat(adns_query qu, void *data) { }
|
|
|
|
/*
|
|
* Now the table.
|
|
*/
|
|
|
|
#define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
|
|
|
|
#define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb
|
|
#define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb
|
|
|
|
#define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
|
|
{ adns_r_##code, rrt, fmt, TYPESZ_M(memb), mf_##memb, printer, parser, comparer }
|
|
#define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \
|
|
{ adns_r_##code, rrt, fmt, TYPESZ_M(memb), mf_flat, printer, parser, comparer }
|
|
|
|
static const typeinfo typeinfos[] = {
|
|
/* Must be in ascending order of rrtype ! */
|
|
/* mem-mgmt code rrt fmt member parser comparer printer */
|
|
|
|
FLAT_TYPE(a, "A", 0, inaddr, pa_inaddr, di_inaddr, cs_inaddr ),
|
|
DEEP_TYPE(ns_raw, "NS", "raw", str, pa_host_raw,0, cs_domain ),
|
|
DEEP_TYPE(cname, "CNAME", 0, str, pa_dom_raw, 0, cs_domain ),
|
|
DEEP_TYPE(soa_raw,"SOA", "raw", soa, pa_soa, 0, cs_soa ),
|
|
DEEP_TYPE(ptr_raw,"PTR", "raw", str, pa_host_raw,0, cs_domain ),
|
|
DEEP_TYPE(hinfo, "HINFO", 0, intstrpair, pa_hinfo, 0, cs_hinfo ),
|
|
DEEP_TYPE(mx_raw, "MX", "raw", intstr, pa_mx_raw, di_mx_raw, cs_inthost ),
|
|
DEEP_TYPE(txt, "TXT", 0, manyistr, pa_txt, 0, cs_txt ),
|
|
DEEP_TYPE(rp_raw, "RP", "raw", strpair, pa_rp, 0, cs_rp ),
|
|
|
|
FLAT_TYPE(addr, "A", "addr", addr, pa_addr, di_addr, cs_addr ),
|
|
DEEP_TYPE(ns, "NS", "+addr", hostaddr, pa_hostaddr,di_hostaddr,cs_hostaddr ),
|
|
DEEP_TYPE(ptr, "PTR","checked",str, pa_ptr, 0, cs_domain ),
|
|
DEEP_TYPE(mx, "MX", "+addr", inthostaddr,pa_mx, di_mx, cs_inthostaddr),
|
|
|
|
DEEP_TYPE(soa, "SOA","822", soa, pa_soa, 0, cs_soa ),
|
|
DEEP_TYPE(rp, "RP", "822", strpair, pa_rp, 0, cs_rp ),
|
|
};
|
|
|
|
const typeinfo *adns__findtype(adns_rrtype type) {
|
|
const typeinfo *begin, *end, *mid;
|
|
|
|
begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo));
|
|
|
|
while (begin < end) {
|
|
mid= begin + ((end-begin)>>1);
|
|
if (mid->type == type) return mid;
|
|
if (type > mid->type) begin= mid+1;
|
|
else end= mid;
|
|
}
|
|
return 0;
|
|
}
|