ossp-pkg/adns/adns_types.c
1.6
/*
* 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) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
* Copyright (C) 1999-2000 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 "adns_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) {
ADNS_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;
ADNS_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 {
ADNS_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;
ADNS_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==' ' || c>=127 || 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,(const byte *)"\"",1);
for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) {
c= *p;
if (c == '"' || c=='\\') adns__vbuf_appendq(vb,(const byte *)"\\",1);
adns__vbuf_appendq(vb,p,1);
}
adns__vbuf_appendq(vb,(const byte *)"\"",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;
}
