*** /dev/null Sun Apr 28 21:30:37 2024
--- - Sun Apr 28 21:31:46 2024
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*** 0 ****
--- 1,1034 ----
+ /*
+ * 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 "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==' ' || 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,"\"",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;
+ }
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