* - RR-type-specific code, and the machinery to call it
*/
/*
- * This file is part of adns, which is Copyright (C) 1997, 1998 Ian Jackson
+ * This file is part of adns, which is
+ * Copyright (C) 1997-2000,2003,2006 Ian Jackson
+ * Copyright (C) 1999-2000,2003,2006 Tony Finch
+ * Copyright (C) 1991 Massachusetts Institute of Technology
+ * (See the file INSTALL for full details.)
*
* 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
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
+#include <stddef.h>
#include <stdlib.h>
-#include <string.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_nolocalmem
-#define CSP_ADDSTR(s) if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; else;
+#define R_NOMEM return adns_s_nomemory
+#define CSP_ADDSTR(s) do { \
+ if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; \
+ } while (0)
-static int dip_inaddr(struct in_addr a, struct in_addr b) {
- /* fixme implement sortlist */
- return 0;
+/*
+ * order of sections:
+ *
+ * _string (pap)
+ * _textdata, _qstring (csp)
+ * _str (mf,cs)
+ * _intstr (mf,csp,cs)
+ * _manyistr (mf,cs)
+ * _txt (pa)
+ * _inaddr (pa,di,cs
+ * +search_sortlist, dip_genaddr, csp_genaddr)
+ * _in6addr (pa,di,cs)
+ * _addr (pap,pa,di,div,csp,cs,gsz,qs
+ * +search_sortlist_sa, dip_sockaddr,
+ * addr_rrtypes, addr_submit, icb_addr)
+ * _domain (pap,csp,cs)
+ * _dom_raw (pa)
+ * _host_raw (pa)
+ * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs
+ * +pap_findaddrs, icb_hostaddr)
+ * _mx_raw (pa,di)
+ * _mx (pa,di)
+ * _inthostaddr (mf,cs)
+ * _inthost (cs)
+ * _ptr (ckl,pa +icb_ptr)
+ * _strpair (mf)
+ * _intstrpair (mf)
+ * _hinfo (pa)
+ * _mailbox (pap,csp +pap_mailbox822)
+ * _rp (pa,cs)
+ * _soa (pa,mf,cs)
+ * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
+ * _byteblock (mf)
+ * _opaque (pa,cs)
+ * _flat (mf)
+ *
+ * within each section:
+ * ckl_*
+ * pap_*
+ * pa_*
+ * dip_*
+ * di_*
+ * mfp_*
+ * mf_*
+ * csp_*
+ * cs_*
+ * gsz_*
+ * postsort_*
+ * qs_*
+ */
+
+/*
+ * _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;
}
-static adns_status pa_inaddr(const parseinfo *pai, int cbyte, int max, void *datap) {
+/*
+ * _inaddr (pa,di,cs +search_sortlist, dip_genaddr, csp_genaddr)
+ */
+
+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;
return adns_s_ok;
}
-static int di_inaddr(const void *datap_a, const void *datap_b) {
- const struct in_addr *ap= datap_a, *bp= datap_b;
+static int search_sortlist(adns_state ads, int af, const void *ad) {
+ const struct sortlist *slp;
+ const struct in6_addr *a6;
+ union gen_addr a;
+ int i;
+ int v6mappedp= 0;
+
+ if (af == AF_INET6) {
+ a6= ad;
+ if (IN6_IS_ADDR_V4MAPPED(a6)) {
+ a.v4.s_addr= htonl(((unsigned long)a6->s6_addr[12] << 24) |
+ ((unsigned long)a6->s6_addr[13] << 16) |
+ ((unsigned long)a6->s6_addr[14] << 8) |
+ ((unsigned long)a6->s6_addr[15] << 0));
+ v6mappedp= 1;
+ }
+ }
+
+ for (i=0, slp=ads->sortlist;
+ i<ads->nsortlist &&
+ !adns__addr_match_p(af,ad, slp->af,&slp->base,&slp->mask) &&
+ !(v6mappedp &&
+ adns__addr_match_p(AF_INET,&a, slp->af,&slp->base,&slp->mask));
+ i++, slp++);
+ return i;
+}
+
+static int dip_genaddr(adns_state ads, int af, const void *a, const void *b) {
+ int ai, bi;
+
+ if (!ads->nsortlist) return 0;
+
+ ai= search_sortlist(ads,af,a);
+ bi= search_sortlist(ads,af,b);
+ return bi<ai;
+}
+
+static int di_inaddr(adns_state ads,
+ const void *datap_a, const void *datap_b) {
+ return dip_genaddr(ads,AF_INET,datap_a,datap_b);
+}
+
+static adns_status csp_genaddr(vbuf *vb, int af, const void *p) {
+ char buf[ADNS_ADDR2TEXT_BUFLEN];
+ int len= sizeof(buf);
+ adns_rr_addr a;
+ int err;
- return dip_inaddr(*ap,*bp);
+ memset(&a, 0, sizeof(a));
+ a.addr.sa.sa_family= af;
+ adns__sockaddr_inject(p, 0, &a.addr.sa);
+ err= adns_addr2text(&a.addr.sa,0, buf,&len, 0); assert(!err);
+ CSP_ADDSTR(buf);
+ return adns_s_ok;
}
static adns_status cs_inaddr(vbuf *vb, const void *datap) {
- const struct in_addr *rrp= datap, rr= *rrp;
- const char *ia;
+ return csp_genaddr(vb, AF_INET,datap);
+}
+
+/*
+ * _in6addr (pa,di,cs)
+ */
- ia= inet_ntoa(rr); assert(ia);
- CSP_ADDSTR(ia);
+static adns_status pa_in6addr(const parseinfo *pai, int cbyte,
+ int max, void *datap) {
+ struct in6_addr *storeto= datap;
+
+ if (max-cbyte != 16) return adns_s_invaliddata;
+ memcpy(storeto->s6_addr, pai->dgram + cbyte, 16);
return adns_s_ok;
}
-static adns_status pa_addr(const parseinfo *pai, int cbyte, int max, void *datap) {
- adns_addr *storeto= datap;
+static int di_in6addr(adns_state ads,
+ const void *datap_a, const void *datap_b) {
+ return dip_genaddr(ads,AF_INET6,datap_a,datap_b);
+}
+
+static adns_status cs_in6addr(vbuf *vb, const void *datap) {
+ return csp_genaddr(vb,AF_INET6,datap);
+}
+
+/*
+ * _addr (pap,pa,di,div,csp,cs,gsz,qs
+ * +search_sortlist_sa, dip_sockaddr, addr_rrtypes,
+ * addr_submit, icb_addr)
+ */
+
+static const typeinfo tinfo_addrsub;
+
+#define ADDR_RRTYPES(_) _(a) _(aaaa)
+
+static const adns_rrtype addr_all_rrtypes[] = {
+#define RRTY_CODE(ty) adns_r_##ty,
+ ADDR_RRTYPES(RRTY_CODE)
+#undef RRTY_CODE
+};
+
+enum {
+#define RRTY_INDEX(ty) addr__ri_##ty,
+ ADDR_RRTYPES(RRTY_INDEX)
+#undef RRTY_INDEX
+ addr_nrrtypes,
+#define RRTY_FLAG(ty) addr_rf_##ty = 1 << addr__ri_##ty,
+ ADDR_RRTYPES(RRTY_FLAG)
+ addr__rrty_hunoz
+#undef RRTY_FLAG
+};
+
+static unsigned addr_rrtypeflag(adns_rrtype type) {
+ int i;
+
+ type &= adns_rrt_typemask;
+ for (i=0; i<addr_nrrtypes && type!=addr_all_rrtypes[i]; i++);
+ return i < addr_nrrtypes ? 1 << i : 0;
+}
+
+static adns_status pap_addr(const parseinfo *pai, int rrty, size_t rrsz,
+ int *cbyte_io, int max, adns_rr_addr *storeto) {
const byte *dgram= pai->dgram;
+ int af, addrlen, salen;
+ struct in6_addr v6map;
+ const void *oaddr= dgram + *cbyte_io;
+ int avail= max - *cbyte_io;
+ int step= -1;
+ void *addrp= 0;
+
+ switch (rrty) {
+ case adns_r_a:
+ if ((pai->qu->flags & adns_qf_ipv6_mapv4) &&
+ (pai->qu->answer->type & adns__qtf_bigaddr)) {
+ if (avail < 4) return adns_s_invaliddata;
+ memset(v6map.s6_addr + 0, 0x00, 10);
+ memset(v6map.s6_addr + 10, 0xff, 2);
+ memcpy(v6map.s6_addr + 12, oaddr, 4);
+ oaddr= v6map.s6_addr; avail= sizeof(v6map.s6_addr);
+ if (step < 0) step= 4;
+ goto aaaa;
+ }
+ af= AF_INET; addrlen= 4;
+ addrp= &storeto->addr.inet.sin_addr;
+ salen= sizeof(storeto->addr.inet);
+ break;
+ case adns_r_aaaa:
+ aaaa:
+ af= AF_INET6; addrlen= 16;
+ addrp= storeto->addr.inet6.sin6_addr.s6_addr;
+ salen= sizeof(storeto->addr.inet6);
+ break;
+ }
+ assert(addrp);
- 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;
- storeto->addr.inet.sin_port= 0;
- memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4);
+ assert(offsetof(adns_rr_addr, addr) + salen <= rrsz);
+ if (addrlen < avail) return adns_s_invaliddata;
+ if (step < 0) step= addrlen;
+ *cbyte_io += step;
+ memset(&storeto->addr, 0, salen);
+ storeto->len= salen;
+ storeto->addr.sa.sa_family= af;
+ memcpy(addrp, oaddr, addrlen);
+
+ return adns_s_ok;
+}
+
+static adns_status pa_addr(const parseinfo *pai, int cbyte,
+ int max, void *datap) {
+ int err= pap_addr(pai, pai->qu->answer->type & adns_rrt_typemask,
+ pai->qu->answer->rrsz, &cbyte, max, datap);
+ if (err) return err;
+ if (cbyte != max) return adns_s_invaliddata;
return adns_s_ok;
}
-static int di_addr(const void *datap_a, const void *datap_b) {
- const adns_addr *ap= datap_a, *bp= datap_b;
+static int search_sortlist_sa(adns_state ads, const struct sockaddr *sa) {
+ union gen_addr a;
+ adns__sockaddr_extract(sa, &a, 0);
+ return search_sortlist(ads, sa->sa_family, &a);
+}
+
+static int dip_sockaddr(adns_state ads,
+ const struct sockaddr *sa,
+ const struct sockaddr *sb) {
+ if (!ads->sortlist) return 0;
+ return search_sortlist_sa(ads, sa) > search_sortlist_sa(ads, sb);
+}
- assert(ap->addr.sa.sa_family == AF_INET);
- return dip_inaddr(ap->addr.inet.sin_addr,bp->addr.inet.sin_addr);
+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;
+ return dip_sockaddr(ads, &ap->addr.sa, &bp->addr.sa);
}
-static adns_status csp_addr(vbuf *vb, const adns_addr *rrp) {
- const char *ia;
- static char buf[30];
+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) {
+ char buf[ADNS_ADDR2TEXT_BUFLEN];
+ int len= sizeof(buf);
+ int err;
switch (rrp->addr.inet.sin_family) {
case AF_INET:
- CSP_ADDSTR("AF_INET ");
- ia= inet_ntoa(rrp->addr.inet.sin_addr); assert(ia);
- CSP_ADDSTR(ia);
+ CSP_ADDSTR("INET ");
+ goto a2t;
+ case AF_INET6:
+ CSP_ADDSTR("INET6 ");
+ goto a2t;
+ a2t:
+ err= adns_addr2text(&rrp->addr.sa,0, buf,&len, 0); assert(!err);
+ CSP_ADDSTR(buf);
break;
default:
sprintf(buf,"AF=%u",rrp->addr.sa.sa_family);
}
static adns_status cs_addr(vbuf *vb, const void *datap) {
- const adns_addr *rrp= datap;
+ const adns_rr_addr *rrp= datap;
return csp_addr(vb,rrp);
}
+static int gsz_addr(const typeinfo *typei, adns_rrtype type) {
+ return type & adns__qtf_bigaddr ?
+ sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only);
+}
+
+static unsigned addr_rrtypes(adns_state ads, adns_rrtype type,
+ adns_queryflags qf) {
+ /* Return a mask of addr_rf_... flags indicating which address families are
+ * wanted, given a query type and flags.
+ */
+ return addr_rf_a;
+}
+
+static void icb_addr(adns_query parent, adns_query child);
+
+static void addr_subqueries(adns_query qu, struct timeval now,
+ adns_queryflags qf_extra,
+ const byte *qd_dgram, int qd_dglen) {
+ int i, err, id;
+ adns_query cqu;
+ adns_queryflags qf= (qu->flags & ~adns_qf_search) | qf_extra;
+ adns_rrtype qtf= qu->answer->type & adns__qtf_deref;
+ unsigned which= qu->ctx.tinfo.addr.want & ~qu->ctx.tinfo.addr.have;
+ qcontext ctx;
+
+ memset(&ctx, 0, sizeof(ctx));
+ ctx.callback= icb_addr;
+ for (i=0; i<addr_nrrtypes; i++) {
+ if (!(which & (1 << i))) continue;
+ err= adns__mkquery_frdgram(qu->ads, &qu->vb, &id, qd_dgram,qd_dglen,
+ DNS_HDRSIZE, addr_all_rrtypes[i], qf);
+ if (err) goto x_error;
+ err= adns__internal_submit(qu->ads, &cqu, qu, &tinfo_addrsub,
+ addr_all_rrtypes[i] | qtf,
+ &qu->vb, id, qf, now, &ctx);
+ if (err) goto x_error;
+ cqu->answer->rrsz= qu->answer->rrsz;
+ }
+ qu->state= query_childw;
+ LIST_LINK_TAIL(qu->ads->childw, qu);
+ return;
+
+x_error:
+ adns__query_fail(qu, err);
+}
+
+static adns_status addr_submit(adns_query parent, adns_query *query_r,
+ vbuf *qumsg_vb, int id, unsigned want,
+ adns_queryflags flags, struct timeval now,
+ qcontext *ctx) {
+ /* This is effectively a substitute for adns__internal_submit, intended for
+ * the case where the caller (possibly) only wants a subset of the
+ * available record types. The memory management and callback rules are
+ * the same as for adns__internal_submit.
+ *
+ * Some differences: the query is linked onto the parent's children list
+ * before exit (though the parent's state is not changed, and it is not
+ * linked into the childw list queue); and we fiddle with the `tinfo'
+ * portion of the context structure (yes, modifying *ctx), since this is,
+ * in fact, the main purpose of this function.
+ */
+
+ adns_state ads= parent->ads;
+ adns_query qu;
+ adns_status err;
+ adns_rrtype type= ((adns_r_addr & adns_rrt_reprmask) |
+ (parent->answer->type & ~adns_rrt_reprmask));
+
+ ctx->tinfo.addr.want= want;
+ ctx->tinfo.addr.have= 0;
+ err= adns__internal_submit(ads, &qu, parent, adns__findtype(adns_r_addr),
+ type, qumsg_vb, id, flags, now, ctx);
+ if (err) return err;
+
+ *query_r= qu;
+ return adns_s_ok;
+}
+
+static adns_status append_addrs(adns_query qu, size_t rrsz,
+ adns_rr_addr **dp, int *dlen,
+ const adns_rr_addr *sp, int slen) {
+ /* Append a vector of slen addr records, each of size rrsz, starting at ap,
+ * to a vector starting at *dp, of length *dlen. On successful completion,
+ * *dp and *dlen are updated.
+ */
+
+ size_t drrsz= *dlen*rrsz, srrsz= slen*rrsz;
+ byte *p;
+
+ if (!slen) return adns_s_ok;
+ p= adns__alloc_interim(qu, drrsz + srrsz);
+ if (!p) R_NOMEM;
+ if (*dlen) {
+ memcpy(p, *dp, drrsz);
+ adns__free_interim(qu, *dp);
+ }
+ memcpy(p + drrsz, sp, srrsz);
+ *dlen += slen;
+ *dp= (adns_rr_addr *)p;
+ return adns_s_ok;
+}
+
+static void propagate_ttl(adns_query to, adns_query from)
+ { if (to->expires > from->expires) to->expires= from->expires; }
+
+static adns_status copy_cname_from_child(adns_query parent, adns_query child) {
+ adns_answer *pans= parent->answer, *cans= child->answer;
+ size_t n= strlen(cans->cname) + 1;
+
+ pans->cname= adns__alloc_preserved(parent, n);
+ if (!pans->cname) R_NOMEM;
+ memcpy(pans->cname, cans->cname, n);
+ return adns_s_ok;
+}
+
+static void done_addr_type(adns_query qu, adns_rrtype type) {
+ unsigned f= addr_rrtypeflag(type);
+ assert(f); qu->ctx.tinfo.addr.have |= f;
+}
+
+static void icb_addr(adns_query parent, adns_query child) {
+ adns_state ads= parent->ads;
+ adns_answer *pans= parent->answer, *cans= child->answer;
+ struct timeval now;
+ adns_status err;
+
+ propagate_ttl(parent, child);
+
+ if (cans->cname && !pans->cname) {
+ err= copy_cname_from_child(parent, child);
+ if (err) goto x_err;
+ }
+
+ if ((parent->flags & adns_qf_search) &&
+ !pans->cname && cans->status == adns_s_nxdomain) {
+ /* We're searching a list of suffixes, and the name doesn't exist. Try
+ * the next one.
+ */
+
+ adns__cancel_children(parent);
+ adns__free_interim(parent, pans->rrs.bytes);
+ pans->rrs.bytes= 0; pans->nrrs= 0;
+ if (gettimeofday(&now, 0)) goto x_gtod;
+ adns__search_next(ads, parent, now);
+ return;
+ }
+
+ if (cans->status && cans->status != adns_s_nodata)
+ { err= cans->status; goto x_err; }
+
+ assert(pans->rrsz == cans->rrsz);
+ err= append_addrs(parent, pans->rrsz,
+ &pans->rrs.addr, &pans->nrrs,
+ cans->rrs.addr, cans->nrrs);
+ if (err) goto x_err;
+ done_addr_type(parent, cans->type);
+
+ if (parent->children.head) LIST_LINK_TAIL(ads->childw, parent);
+ else if (!pans->nrrs) adns__query_fail(parent, adns_s_nodata);
+ else adns__query_done(parent);
+ return;
+
+x_gtod:
+ adns__diag(ads, -1, parent, "gettimeofday failed: %s", strerror(errno));
+ err= adns_s_systemfail;
+ goto x_err;
+
+x_err:
+ adns__query_fail(parent, err);
+}
+
+static void qs_addr(adns_query qu, struct timeval now) {
+ if (!qu->ctx.tinfo.addr.want) {
+ qu->ctx.tinfo.addr.want= addr_rrtypes(qu->ads, qu->answer->type,
+ qu->flags);
+ qu->ctx.tinfo.addr.have= 0;
+ }
+ addr_subqueries(qu, now, 0, qu->query_dgram, qu->query_dglen);
+}
+
+/*
+ * _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;
return adns_s_ok;
}
-static adns_status pa_host_raw(const parseinfo *pai, int cbyte, int max, void *datap) {
+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,
- pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
+ st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok);
if (st) return st;
if (cbyte != max) return adns_s_invaliddata;
return adns_s_ok;
}
-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;
+/*
+ * _host_raw (pa)
+ */
+
+static adns_status pa_host_raw(const parseinfo *pai, int cbyte,
+ int max, void *datap) {
+ char **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,
+ st= pap_domain(pai, &cbyte, max, rrp,
pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
if (st) return st;
return adns_s_ok;
}
+/*
+ * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs, icb_hostaddr)
+ */
static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha,
+ unsigned *want_io, size_t addrsz,
int *cbyte_io, int count, int dmstart) {
int rri, naddrs;
- int type, class, rdlen, rdstart, ownermatched;
+ unsigned typef, want= *want_io, need= want;
+ int type, class, rdlen, rdend, 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, &rdlen, &rdstart,
+ for (rri=0, naddrs=0; 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_addr))) R_NOMEM;
- st= pa_addr(pai, rdstart,rdstart+rdlen, pai->qu->vb.buf + naddrs*sizeof(adns_addr));
+ if (!ownermatched || class != DNS_CLASS_IN) continue;
+ typef= addr_rrtypeflag(type);
+ if (!(want & typef)) continue;
+ need &= ~typef;
+ if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*addrsz)) R_NOMEM;
+ adns__update_expires(pai->qu,ttl,pai->now);
+ rdend= rdstart + rdlen;
+ st= pap_addr(pai, type, addrsz, &rdstart, rdend,
+ (adns_rr_addr *)(pai->qu->vb.buf + naddrs*addrsz));
if (st) return st;
+ if (rdstart != rdend) return adns_s_invaliddata;
naddrs++;
}
- if (naddrs >= 0) {
- ha->addrs= adns__alloc_interim(pai->qu, naddrs*sizeof(adns_addr));
- if (!ha->addrs) R_NOMEM;
- memcpy(ha->addrs, pai->qu->vb.buf, naddrs*sizeof(adns_addr));
- ha->naddrs= naddrs;
+ if (naddrs > 0) {
+ st= append_addrs(pai->qu, addrsz, &ha->addrs, &ha->naddrs,
+ (const adns_rr_addr *)pai->qu->vb.buf, naddrs);
+ if (st) return st;
ha->astatus= adns_s_ok;
- adns__isort(ha->addrs, naddrs, sizeof(adns_addr), pai->qu->vb.buf, di_addr);
+ if (!need) {
+ adns__isort(ha->addrs, naddrs, addrsz, pai->qu->vb.buf,
+ div_addr, pai->ads);
+ }
}
+ *want_io= need;
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.pinfo.hostaddr;
+ adns_state ads= parent->ads;
+ adns_status st;
+ size_t addrsz= gsz_addr(0, parent->answer->type);
+
+ st= cans->status == adns_s_nodata ? adns_s_ok : cans->status;
+ if (st) goto done;
+ propagate_ttl(parent, child);
+
+ assert(addrsz == cans->rrsz);
+ st= append_addrs(parent, addrsz,
+ &rrp->addrs, &rrp->naddrs,
+ cans->rrs.addr, cans->nrrs);
+ if (st) goto done;
+ if (!rrp->naddrs) { st= adns_s_nodata; goto done; }
+
+ if (!adns__vbuf_ensure(&parent->vb, addrsz))
+ { st= adns_s_nomemory; goto done; }
+ adns__isort(rrp->addrs, rrp->naddrs, addrsz, parent->vb.buf,
+ div_addr, ads);
+
+done:
+ if (st) {
+ adns__free_interim(parent, rrp->addrs);
+ rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : 0;
+ }
+
+ rrp->astatus= st;
+ 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;
+ unsigned want;
+ size_t addrsz= gsz_addr(0, pai->qu->answer->type);
dmstart= cbyte= *cbyte_io;
st= pap_domain(pai, &cbyte, max, &rrp->host,
*cbyte_io= cbyte;
rrp->astatus= adns_s_ok;
- rrp->naddrs= -1;
+ rrp->naddrs= 0;
rrp->addrs= 0;
cbyte= pai->nsstart;
- st= pap_findaddrs(pai, rrp, &cbyte, pai->nscount, dmstart);
+ want= addr_rrtypes(pai->ads, pai->qu->answer->type, pai->qu->flags);
+
+ st= pap_findaddrs(pai, rrp, &want, addrsz, &cbyte, pai->nscount, dmstart);
+ if (st) return st;
+ if (!want) return adns_s_ok;
+
+ st= pap_findaddrs(pai, rrp, &want, addrsz, &cbyte, pai->arcount, dmstart);
if (st) return st;
- if (rrp->naddrs != -1) return adns_s_ok;
+ if (!want) return adns_s_ok;
- st= pap_findaddrs(pai, rrp, &cbyte, pai->arcount, dmstart);
+ 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;
- if (rrp->naddrs != -1) return adns_s_ok;
- rrp->naddrs= 0; /* fixme additional section didn't have required data */
- rrp->astatus= adns_s_notimplemented;
+ ctx.ext= 0;
+ ctx.callback= icb_hostaddr;
+ ctx.pinfo.hostaddr= rrp;
+
+ nflags= adns_qf_quoteok_query | (pai->qu->flags & adns_qf_ipv6_mapv4);
+ if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid;
+
+ st= addr_submit(pai->qu, &nqu, &pai->qu->vb, id, want,
+ nflags, pai->now, &ctx);
+ if (st) return st;
return adns_s_ok;
}
-static adns_status pa_hostaddr(const parseinfo *pai, int cbyte, int max, void *datap) {
+static adns_status pa_hostaddr(const parseinfo *pai, int cbyte,
+ int max, void *datap) {
adns_rr_hostaddr *rrp= datap;
adns_status st;
return adns_s_ok;
}
-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;
+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;
- 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;
+ return dip_sockaddr(ads, &ap->addrs[0].addr.sa, &bp->addrs[0].addr.sa);
+}
+
+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;
+ size_t addrsz= gsz_addr(0, qu->answer->type);
+
+ adns__makefinal_str(qu,&rrp->host);
+ tablev= rrp->addrs;
+ adns__makefinal_block(qu, &tablev, rrp->naddrs*addrsz);
+ 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 (cbyte != max) return adns_s_invaliddata;
+ 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 int dip_hostaddr(const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) {
- if (ap->astatus != bp->astatus) return ap->astatus;
- if (ap->astatus) return 0;
+static adns_status cs_hostaddr(vbuf *vb, const void *datap) {
+ const adns_rr_hostaddr *rrp= datap;
- assert(ap->addrs[0].addr.sa.sa_family == AF_INET);
- assert(bp->addrs[0].addr.sa.sa_family == AF_INET);
- return dip_inaddr(ap->addrs[0].addr.inet.sin_addr, bp->addrs[0].addr.inet.sin_addr);
+ return csp_hostaddr(vb,rrp);
}
-static int di_hostaddr(const void *datap_a, const void *datap_b) {
- const adns_rr_hostaddr *ap= datap_a, *bp= datap_b;
+/*
+ * _mx_raw (pa,di)
+ */
- return dip_hostaddr(ap,bp);
+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(const void *datap_a, const void *datap_b) {
+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;
return 0;
}
-static int di_mx(const void *datap_a, const void *datap_b) {
+/*
+ * _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(&ap->ha,&bp->ha);
+ return dip_hostaddr(ads, &ap->ha, &bp->ha);
}
-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;
+/*
+ * _inthostaddr (mf,cs)
+ */
- startbyte= cbyte;
- if (cbyte >= max) return adns_s_invaliddata;
- tc= 0;
- while (cbyte < max) {
- GET_B(cbyte,l);
- cbyte+= l;
+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 (ckl,pa +icb_ptr)
+ */
+
+static adns_status ckl_ptr(adns_state ads, adns_queryflags flags,
+ union checklabel_state *cls, qcontext *ctx,
+ int labnum, const char *label, int lablen) {
+ if (lablen) {
+ if (adns__revparse_label(&cls->ptr, labnum, label,lablen))
+ return adns_s_querydomainwrong;
+ } else {
+ if (adns__revparse_done(&cls->ptr, labnum,
+ &ctx->tinfo.ptr.rev_rrtype,
+ &ctx->tinfo.ptr.addr))
+ return adns_s_querydomainwrong;
+ }
+ return adns_s_ok;
+}
+
+static void icb_ptr(adns_query parent, adns_query child) {
+ adns_answer *cans= child->answer;
+ const struct af_addr *queried;
+ const unsigned char *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.tinfo.ptr.addr;
+ for (i=0, found=cans->rrs.bytes; i<cans->nrrs; i++, found+=cans->rrsz) {
+ if (adns__genaddr_equal_p(queried->af,&queried->addr,
+ parent->ctx.tinfo.ptr.addr.af,found)) {
+ 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) {
+ char **rrp= datap;
+ adns_status st;
+ adns_rrtype rrtype= pai->qu->ctx.tinfo.ptr.rev_rrtype;
+ int cbyte, 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;
- table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1));
- if (!table) R_NOMEM;
+ st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
+ pai->dgram, pai->dglen, dmstart,
+ rrtype, adns_qf_quoteok_query);
+ if (st) return st;
- for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) {
- GET_B(cbyte,l);
- te->str= adns__alloc_interim(pai->qu, l+1);
- if (!te->str) R_NOMEM;
- te->str[l]= 0;
- memcpy(te->str,dgram+cbyte,l);
- te->i= l;
+ ctx.ext= 0;
+ ctx.callback= icb_ptr;
+ memset(&ctx.pinfo,0,sizeof(ctx.pinfo));
+ memset(&ctx.tinfo,0,sizeof(ctx.tinfo));
+ st= adns__internal_submit(pai->ads, &nqu, pai->qu,
+ adns__findtype(rrtype),
+ rrtype, &pai->qu->vb, id,
+ adns_qf_quoteok_query, pai->now, &ctx);
+ if (st) return st;
+
+ 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;
}
- assert(cbyte == max);
- te->i= -1;
- te->str= 0;
+ if (cbyte != max) return adns_s_invaliddata;
- *rrp= table;
return adns_s_ok;
}
-static adns_status csp_textdata(vbuf *vb, const char *dp, int len) {
- unsigned char ch;
- char buf[10];
- int cn;
+/*
+ * _mailbox (pap,cs +pap_mailbox822)
+ */
- CSP_ADDSTR("\"");
- for (cn=0; cn<len; cn++) {
- ch= *dp++;
- if (ch >= 32 && ch <= 126 && ch != '"' && ch != '\\') {
- if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM;
- } else {
- sprintf(buf,"\\%02x",ch);
- CSP_ADDSTR(buf);
+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;
}
- CSP_ADDSTR("\"");
-
+
+ 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 csp_qstring(vbuf *vb, const char *dp) {
- return csp_textdata(vb, dp, strlen(dp));
+static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max,
+ char **mb_r) {
+ if (pai->qu->typei->typekey & 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);
}
-static adns_status cs_str(vbuf *vb, const void *datap) {
- const char *const *rrp= datap;
+/*
+ * _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;
- return csp_qstring(vb,*rrp);
+ 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_intstr(vbuf *vb, const void *datap) {
- const adns_rr_intstr *rrp= datap;
- char buf[10];
+static adns_status cs_rp(vbuf *vb, const void *datap) {
+ const adns_rr_strpair *rrp= datap;
+ adns_status st;
- sprintf(buf,"%u ",rrp->i);
- CSP_ADDSTR(buf);
- return csp_qstring(vb,rrp->str);
+ 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 adns_status cs_manyistr(vbuf *vb, const void *datap) {
- const adns_rr_intstr *const *rrp= datap;
- const adns_rr_intstr *current;
+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;
- int spc;
+
+ st= csp_domain(vb,rrp->mname); if (st) return st;
+ CSP_ADDSTR(" ");
+ st= csp_mailbox(vb,rrp->rname); if (st) return st;
- for (spc=0, current= *rrp; current->i >= 0; current++) {
- if (spc) CSP_ADDSTR(" ");
- st= csp_textdata(vb,current->str,current->i); if (st) return st;
+ for (i=0; i<5; i++) {
+ sprintf(buf," %lu",(&rrp->serial)[i]);
+ CSP_ADDSTR(buf);
}
+
return adns_s_ok;
}
-static void mf_str(adns_query qu, void *datap) {
- char **rrp= datap;
+/*
+ * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort)
+ */
- adns__makefinal_str(qu,rrp);
+static adns_status ckl_srv(adns_state ads, adns_queryflags flags,
+ union checklabel_state *cls, qcontext *ctx,
+ int labnum, const char *label, int lablen) {
+ if (labnum < 2 && !(flags & adns_qf_quoteok_query)) {
+ if (!lablen || label[0] != '_') return adns_s_querydomaininvalid;
+ return adns_s_ok;
+ }
+ return adns__ckl_hostname(ads, flags, cls, ctx, labnum, label, lablen);
}
-static void mf_intstr(adns_query qu, void *datap) {
- adns_rr_intstr *rrp= datap;
+static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max,
+ adns_rr_srvha *rrp
+ /* might be adns_rr_srvraw* */) {
+ const byte *dgram= pai->dgram;
+ int ti, cbyte;
- adns__makefinal_str(qu,&rrp->str);
+ cbyte= *cbyte_io;
+ if ((*cbyte_io += 6) > max) return adns_s_invaliddata;
+
+ rrp->priority= GET_W(cbyte, ti);
+ rrp->weight= GET_W(cbyte, ti);
+ rrp->port= GET_W(cbyte, ti);
+ return adns_s_ok;
}
-static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) {
- const char *to_add;
+static adns_status pa_srvraw(const parseinfo *pai, int cbyte,
+ int max, void *datap) {
+ adns_rr_srvraw *rrp= datap;
adns_status st;
- int i;
- st= csp_qstring(vb,rrp->host); if (st) return st;
+ st= pap_srv_begin(pai,&cbyte,max,datap);
+ if (st) return st;
+
+ st= pap_domain(pai, &cbyte, max, &rrp->host,
+ 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 adns_status pa_srvha(const parseinfo *pai, int cbyte,
+ int max, void *datap) {
+ adns_rr_srvha *rrp= datap;
+ adns_status st;
- if (rrp->astatus) {
- CSP_ADDSTR(" - ");
- CSP_ADDSTR(adns_strerror(rrp->astatus));
- } else {
- assert(rrp->naddrs > 0);
- for (i=0, to_add= ": "; i<rrp->naddrs; i++, to_add= ", ") {
- CSP_ADDSTR(to_add);
- st= csp_addr(vb,&rrp->addrs[i]);
- }
- }
+ st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st;
+ st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st;
+ if (cbyte != max) return adns_s_invaliddata;
return adns_s_ok;
}
-static adns_status cs_hostaddr(vbuf *vb, const void *datap) {
- const adns_rr_hostaddr *rrp= datap;
+static void mf_srvraw(adns_query qu, void *datap) {
+ adns_rr_srvraw *rrp= datap;
+ adns__makefinal_str(qu, &rrp->host);
+}
- return csp_hostaddr(vb,rrp);
+static void mf_srvha(adns_query qu, void *datap) {
+ adns_rr_srvha *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];
+static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) {
+ const adns_rr_srvraw *ap= datap_a, *bp= datap_b;
+ /* might be const adns_rr_svhostaddr* */
- sprintf(buf,"%u ",rrp->i);
+ if (ap->priority < bp->priority) return 0;
+ if (ap->priority > bp->priority) return 1;
+ return 0;
+}
+
+static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp
+ /* might be adns_rr_srvraw* */) {
+ char buf[30];
+ sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port);
CSP_ADDSTR(buf);
+ return adns_s_ok;
+}
+
+static adns_status cs_srvraw(vbuf *vb, const void *datap) {
+ const adns_rr_srvraw *rrp= datap;
+ adns_status st;
+
+ st= csp_srv_begin(vb,(const void*)rrp); if (st) return st;
+ return csp_domain(vb,rrp->host);
+}
+static adns_status cs_srvha(vbuf *vb, const void *datap) {
+ const adns_rr_srvha *rrp= datap;
+ adns_status st;
+
+ st= csp_srv_begin(vb,(const void*)datap); if (st) return st;
return csp_hostaddr(vb,&rrp->ha);
}
-
-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 postsort_srv(adns_state ads, void *array, int nrrs,int rrsz,
+ const struct typeinfo *typei) {
+ /* we treat everything in the array as if it were an adns_rr_srvha
+ * even though the array might be of adns_rr_srvraw. That's OK
+ * because they have the same prefix, which is all we access.
+ * We use rrsz, too, rather than naive array indexing, of course.
+ */
+ char *workbegin, *workend, *search, *arrayend;
+ const adns_rr_srvha *rr;
+ union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp;
+ int cpriority, totalweight, runtotal;
+ long randval;
+
+ assert(rrsz <= sizeof(rrtmp));
+ for (workbegin= array, arrayend= workbegin + rrsz * nrrs;
+ workbegin < arrayend;
+ workbegin= workend) {
+ cpriority= (rr=(void*)workbegin)->priority;
+
+ for (workend= workbegin, totalweight= 0;
+ workend < arrayend && (rr=(void*)workend)->priority == cpriority;
+ workend += rrsz) {
+ totalweight += rr->weight;
+ }
+
+ /* Now workbegin..(workend-1) incl. are exactly all of the RRs of
+ * cpriority. From now on, workbegin points to the `remaining'
+ * records: we select one record at a time (RFC2782 `Usage rules'
+ * and `Format of the SRV RR' subsection `Weight') to place at
+ * workbegin (swapping with the one that was there, and then
+ * advance workbegin. */
+ for (;
+ workbegin + rrsz < workend; /* don't bother if just one */
+ workbegin += rrsz) {
+
+ randval= nrand48(ads->rand48xsubi);
+ randval %= (totalweight + 1);
+ /* makes it into 0..totalweight inclusive; with 2^10 RRs,
+ * totalweight must be <= 2^26 so probability nonuniformity is
+ * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie
+ * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5).
+ */
+
+ for (search=workbegin, runtotal=0;
+ (runtotal += (rr=(void*)search)->weight) < randval;
+ search += rrsz);
+ assert(search < arrayend);
+ totalweight -= rr->weight;
+ if (search != workbegin) {
+ memcpy(&rrtmp, workbegin, rrsz);
+ memcpy(workbegin, search, rrsz);
+ memcpy(search, &rrtmp, rrsz);
+ }
+ }
+ }
+ /* tests:
+ * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk.
+ * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk.
+ * ./adnshost_s -t srv- _jabber._tcp.jabber.org
+ */
}
-static void mf_hostaddr(adns_query qu, void *datap) {
- adns_rr_hostaddr *rrp= datap;
+/*
+ * _byteblock (mf)
+ */
- mfp_hostaddr(qu,rrp);
+static void mf_byteblock(adns_query qu, void *datap) {
+ adns_rr_byteblock *rrp= datap;
+ void *bytes= rrp->data;
+ adns__makefinal_block(qu,&bytes,rrp->len);
+ rrp->data= bytes;
}
-static void mf_inthostaddr(adns_query qu, void *datap) {
- adns_rr_inthostaddr *rrp= datap;
+/*
+ * _opaque (pa,cs)
+ */
- mfp_hostaddr(qu,&rrp->ha);
+static adns_status pa_opaque(const parseinfo *pai, int cbyte,
+ int max, void *datap) {
+ adns_rr_byteblock *rrp= datap;
+
+ rrp->len= max - cbyte;
+ rrp->data= adns__alloc_interim(pai->qu, rrp->len);
+ if (!rrp->data) R_NOMEM;
+ memcpy(rrp->data, pai->dgram + cbyte, rrp->len);
+ return adns_s_ok;
}
-static void mf_manyistr(adns_query qu, void *datap) {
- adns_rr_intstr **rrp= datap;
- adns_rr_intstr *te, *table;
- void *tablev;
- int tc;
+static adns_status cs_opaque(vbuf *vb, const void *datap) {
+ const adns_rr_byteblock *rrp= datap;
+ char buf[10];
+ int l;
+ unsigned char *p;
- 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);
+ sprintf(buf,"\\# %d",rrp->len);
+ CSP_ADDSTR(buf);
+
+ for (l= rrp->len, p= rrp->data;
+ l>=4;
+ l -= 4, p += 4) {
+ sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]);
+ CSP_ADDSTR(buf);
+ }
+ for (;
+ l>0;
+ l--, p++) {
+ sprintf(buf," %02x",*p);
+ CSP_ADDSTR(buf);
+ }
+ return adns_s_ok;
}
+
+/*
+ * _flat (mf)
+ */
static void mf_flat(adns_query qu, void *data) { }
-#define TYPE_SF(size,func,cp,free) size, pa_##func, mf_##free, cs_##cp
-#define TYPE_SN(size,func,cp) size, pa_##func, mf_flat, cs_##cp
+/*
+ * Now the table.
+ */
+
#define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
-#define TYPE_MF(memb,parse) TYPE_SF(TYPESZ_M(memb),parse,memb,memb)
-#define TYPE_MN(memb,parse) TYPE_SN(TYPESZ_M(memb),parse,memb)
-#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&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_##memb, \
+ GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
+ adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \
+ CDR(__VA_ARGS__) }
+#define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \
+ { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_flat, \
+ GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \
+ adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \
+ CDR(__VA_ARGS__) }
-/* TYPE_<ms><nf>
- * ms is M specify member name
- * or S specify size explicitly
- * nf is F full memory management, dependent on member name or specified func
- * N no memory management required
- */
+#define di_0 0
static const typeinfo typeinfos[] = {
- /* Must be in ascending order of rrtype ! */
- /* rr type code rrt fmt mem.mgmt member parser comparer */
-
- { adns_r_a, "A", 0, FLAT_MEMB(inaddr), pa_inaddr, di_inaddr },
- { adns_r_ns_raw, "NS", "raw", DEEP_MEMB(str), pa_host_raw, 0 },
- { adns_r_cname, "CNAME", 0, DEEP_MEMB(str), pa_host_raw, 0 },
-#if 0 /*fixme*/
- { adns_r_soa_raw, "SOA", "raw", DEEP_MEMB(soa), pa_soa, 0 },
-#endif
- { adns_r_ptr_raw, "PTR", "raw", DEEP_MEMB(str), pa_host_raw, 0 },
-#if 0 /*fixme*/
- { adns_r_hinfo, "HINFO", 0, DEEP_MEMB(strpair), pa_hinfo, 0 },
-#endif
- { adns_r_mx_raw, "MX", "raw", DEEP_MEMB(intstr), pa_mx_raw, di_mx_raw },
- { adns_r_txt, "TXT", 0, DEEP_MEMB(manyistr), pa_txt, 0 },
-#if 0 /*fixme*/
- { adns_r_rp_raw, "RP", "raw", DEEP_MEMB(strpair), pa_rp, 0 },
-#endif
-
- { adns_r_addr, "A", "addr", FLAT_MEMB(addr), pa_addr, di_addr },
- { adns_r_ns, "NS", "+addr", DEEP_MEMB(hostaddr), pa_hostaddr, di_hostaddr },
-#if 0 /*fixme*/
- { adns_r_ptr, "PTR","checked", DEEP_MEMB(str), pa_ptr, 0 },
-#endif
- { adns_r_mx, "MX", "+addr", DEEP_MEMB(inthostaddr), pa_mx, di_mx },
-
-#if 0 /*fixme*/
- { adns_r_soa, "SOA","822", DEEP_MEMB(soa), pa_soa, 0 },
- { adns_r_rp, "RP", "822", DEEP_MEMB(strpair), pa_rp, 0 },
-#endif
+/* Must be in ascending order of rrtype ! */
+/* mem-mgmt code rrt fmt member parser comparer printer */
+
+FLAT_TYPE(a, "A", 0, inaddr, inaddr, inaddr,inaddr ),
+DEEP_TYPE(ns_raw, "NS", "raw",str, host_raw,0, domain ),
+DEEP_TYPE(cname, "CNAME", 0, str, dom_raw, 0, domain ),
+DEEP_TYPE(soa_raw,"SOA", "raw",soa, soa, 0, soa ),
+DEEP_TYPE(ptr_raw,"PTR", "raw",str, host_raw,0, domain ),
+DEEP_TYPE(hinfo, "HINFO", 0, intstrpair,hinfo, 0, hinfo ),
+DEEP_TYPE(mx_raw, "MX", "raw",intstr, mx_raw, mx_raw,inthost ),
+DEEP_TYPE(txt, "TXT", 0, manyistr, txt, 0, txt ),
+DEEP_TYPE(rp_raw, "RP", "raw",strpair, rp, 0, rp ),
+FLAT_TYPE(aaaa, "AAAA", 0, in6addr, in6addr, in6addr,in6addr ),
+DEEP_TYPE(srv_raw,"SRV", "raw",srvraw , srvraw, srv, srvraw,
+ .checklabel= ckl_srv, .postsort= postsort_srv),
+
+FLAT_TYPE(addr, "A", "addr", addr, addr, addr, addr,
+ .getrrsz= gsz_addr, .query_send= qs_addr),
+DEEP_TYPE(ns, "NS", "+addr",hostaddr, hostaddr,hostaddr,hostaddr ),
+DEEP_TYPE(ptr, "PTR","checked",str, ptr, 0, domain,
+ .checklabel= ckl_ptr),
+DEEP_TYPE(mx, "MX", "+addr",inthostaddr,mx, mx, inthostaddr, ),
+DEEP_TYPE(srv, "SRV","+addr",srvha, srvha, srv, srvha,
+ .checklabel= ckl_srv, .postsort= postsort_srv),
+
+DEEP_TYPE(soa, "SOA","822", soa, soa, 0, soa ),
+DEEP_TYPE(rp, "RP", "822", strpair, rp, 0, rp ),
};
+static const typeinfo tinfo_addrsub =
+FLAT_TYPE(none, "<addr>","sub",addr, addr, 0, addr,
+ .getrrsz= gsz_addr);
+
+static const typeinfo typeinfo_unknown=
+DEEP_TYPE(unknown,0, "unknown",byteblock,opaque, 0, opaque );
+
const typeinfo *adns__findtype(adns_rrtype type) {
const typeinfo *begin, *end, *mid;
+ if (type & adns_r_unknown) return &typeinfo_unknown;
+ type &= adns_rrt_reprmask;
+
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;
+ if (mid->typekey == type) return mid;
+ if (type > mid->typekey) begin= mid+1;
else end= mid;
}
return 0;
~ianmdlvl / adns.git / blobdiff