*/
/*
* This file is part of adns, which is
- * Copyright (C) 1997-2000,2003,2006 Ian Jackson
+ * Copyright (C) 1997-2000,2003,2006,2014 Ian Jackson
+ * Copyright (C) 2014 Mark Wooding
* 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
- * the Free Software Foundation; either version 2, or (at your option)
+ * the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* 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.
+ * along with this program; if not, write to the Free Software Foundation.
*/
#include <stdlib.h>
static void readconfig(adns_state ads, const char *filename, int warnmissing);
-static void addserver(adns_state ads, const struct sockaddr *sa, int n) {
+static void addserver(adns_state ads, const struct sockaddr *sa, int salen) {
int i;
adns_rr_addr *ss;
- const struct sockaddr_in *sin;
-
- assert(sa->sa_family==AF_INET); assert(n>=sizeof(*sin));
- sin= (const void *)sa;
+ char buf[ADNS_ADDR2TEXT_BUFLEN];
for (i=0; i<ads->nservers; i++) {
- assert(ads->servers[i].addr.sa.sa_family==AF_INET);
- if (ads->servers[i].addr.inet.sin_addr.s_addr == sin->sin_addr.s_addr) {
+ if (adns__sockaddrs_equal(sa, &ads->servers[i].addr.sa)) {
adns__debug(ads,-1,0,"duplicate nameserver %s ignored",
- inet_ntoa(sin->sin_addr));
+ adns__sockaddr_ntoa(sa, buf));
return;
}
}
if (ads->nservers>=MAXSERVERS) {
adns__diag(ads,-1,0,"too many nameservers, ignoring %s",
- inet_ntoa(sin->sin_addr));
+ adns__sockaddr_ntoa(sa, buf));
return;
}
ss= ads->servers+ads->nservers;
- assert(n <= sizeof(ss->addr));
- ss->len = n;
- memcpy(&ss->addr, sa, n);
+ assert(salen <= sizeof(ss->addr));
+ ss->len = salen;
+ memcpy(&ss->addr, sa, salen);
ads->nservers++;
}
static void ccf_nameserver(adns_state ads, const char *fn,
int lno, const char *buf) {
- struct sockaddr_in sin;
-
- memset(&sin,0,sizeof(sin));
- sin.sin_family= AF_INET;
- sin.sin_port= htons(DNS_PORT);
- if (!inet_aton(buf,&sin.sin_addr)) {
+ adns_rr_addr a;
+ char addrbuf[ADNS_ADDR2TEXT_BUFLEN];
+ int err;
+
+ a.len= sizeof(a.addr);
+ err= adns_text2addr(buf,DNS_PORT, 0, &a.addr.sa,&a.len);
+ switch (err) {
+ case 0:
+ break;
+ case EINVAL:
configparseerr(ads,fn,lno,"invalid nameserver address `%s'",buf);
return;
+ default:
+ configparseerr(ads,fn,lno,"failed to parse nameserver address `%s': %s",
+ buf,strerror(err));
+ return;
}
- adns__debug(ads,-1,0,"using nameserver %s",inet_ntoa(sin.sin_addr));
- addserver(ads,(const struct sockaddr *)&sin,sizeof(sin));
+ adns__debug(ads,-1,0,"using nameserver %s",
+ adns__sockaddr_ntoa(&a.addr.sa, addrbuf));
+ addserver(ads,&a.addr.sa,a.len);
}
static void ccf_search(adns_state ads, const char *fn,
ads->searchlist= newptrs;
}
+static int gen_pton(const char *text, int want_af, adns_sockaddr *a) {
+ int err;
+ int len;
+
+ len= sizeof(*a);
+ err= adns_text2addr(text,0, adns_qf_addrlit_scope_forbid,
+ &a->sa, &len);
+ if (err) { assert(err == EINVAL); return 0; }
+ if (want_af != AF_UNSPEC && a->sa.sa_family != want_af) return 0;
+ return 1;
+}
+
static void ccf_sortlist(adns_state ads, const char *fn,
int lno, const char *buf) {
const char *word;
char tbuf[200], *slash, *ep;
const char *maskwhat;
- struct in_addr base, mask;
+ struct sortlist *sl;
int l;
- unsigned long initial, baselocal;
+ int initial= -1;
if (!buf) return;
memcpy(tbuf,word,l); tbuf[l]= 0;
slash= strchr(tbuf,'/');
if (slash) *slash++= 0;
-
- if (!inet_aton(tbuf,&base)) {
+
+ sl= &ads->sortlist[ads->nsortlist];
+ if (!gen_pton(tbuf, AF_UNSPEC, &sl->base)) {
configparseerr(ads,fn,lno,"invalid address `%s' in sortlist",tbuf);
continue;
}
if (slash) {
- if (strchr(slash,'.')) {
+ if (slash[strspn(slash, "0123456789")]) {
maskwhat = "mask";
- if (!inet_aton(slash,&mask)) {
+ if (!gen_pton(slash, sl->base.sa.sa_family, &sl->mask)) {
configparseerr(ads,fn,lno,"invalid mask `%s' in sortlist",slash);
continue;
}
} else {
maskwhat = "prefix length";
initial= strtoul(slash,&ep,10);
- if (*ep || initial>32) {
+ if (*ep || initial>adns__addr_width(sl->base.sa.sa_family)) {
configparseerr(ads,fn,lno,"mask length `%s' invalid",slash);
continue;
}
- mask.s_addr= htonl((0x0ffffffffUL) << (32-initial));
+ sl->mask.sa.sa_family= sl->base.sa.sa_family;
+ adns__prefix_mask(&sl->mask, initial);
}
} else {
- maskwhat = "implied mask";
- baselocal= ntohl(base.s_addr);
- if (!(baselocal & 0x080000000UL)) /* class A */
- mask.s_addr= htonl(0x0ff000000UL);
- else if ((baselocal & 0x0c0000000UL) == 0x080000000UL)
- mask.s_addr= htonl(0x0ffff0000UL); /* class B */
- else if ((baselocal & 0x0f0000000UL) == 0x0e0000000UL)
- mask.s_addr= htonl(0x0ff000000UL); /* class C */
- else {
+ maskwhat = "implied prefix length";
+ initial= adns__guess_prefix_length(&sl->base);
+ if (initial < 0) {
configparseerr(ads,fn,lno, "network address `%s'"
" in sortlist is not in classed ranges,"
" must specify mask explicitly", tbuf);
continue;
}
+ sl->mask.sa.sa_family= sl->base.sa.sa_family;
+ adns__prefix_mask(&sl->mask, initial);
}
- if (base.s_addr & ~mask.s_addr) {
- configparseerr(ads,fn,lno, "%s `%s' in sortlist"
- " overlaps address `%s'",maskwhat,
- slash ? slash : inet_ntoa(mask), tbuf);
+ if (!adns__addr_matches(sl->base.sa.sa_family,
+ adns__sockaddr_addr(&sl->base.sa),
+ &sl->base,&sl->mask)) {
+ if (initial >= 0) {
+ configparseerr(ads,fn,lno, "%s %d in sortlist"
+ " overlaps address `%s'",maskwhat,initial,tbuf);
+ } else {
+ configparseerr(ads,fn,lno, "%s `%s' in sortlist"
+ " overlaps address `%s'",maskwhat,slash,tbuf);
+ }
continue;
}
- ads->sortlist[ads->nsortlist].af= AF_INET;
- ads->sortlist[ads->nsortlist].base.v4= base;
- ads->sortlist[ads->nsortlist].mask.v4= mask;
ads->nsortlist++;
}
}
static void ccf_options(adns_state ads, const char *fn,
int lno, const char *buf) {
- const char *word;
+ const char *opt, *word, *endword, *endopt;
char *ep;
unsigned long v;
int l;
if (!buf) return;
+#define WORD__IS(s,op) ((endword-word) op (sizeof(s)-1) && \
+ !memcmp(word,s,(sizeof(s)-1)))
+#define WORD_IS(s) (WORD__IS(s,==))
+#define WORD_STARTS(s) (WORD__IS(s,>=) ? ((word+=sizeof(s)-1)) : 0)
+
while (nextword(&buf,&word,&l)) {
- if (l==5 && !memcmp(word,"debug",5)) {
+ opt=word;
+ endopt=endword=word+l;
+ if (WORD_IS("debug")) {
ads->iflags |= adns_if_debug;
continue;
}
- if (l>=6 && !memcmp(word,"ndots:",6)) {
- v= strtoul(word+6,&ep,10);
- if (l==6 || ep != word+l || v > INT_MAX) {
+ if (WORD_STARTS("ndots:")) {
+ v= strtoul(word,&ep,10);
+ if (ep==word || ep != endword || v > INT_MAX) {
configparseerr(ads,fn,lno,"option `%.*s' malformed"
- " or has bad value",l,word);
+ " or has bad value",l,opt);
continue;
}
ads->searchndots= v;
continue;
}
- if (l>=12 && !memcmp(word,"adns_checkc:",12)) {
- if (!strcmp(word+12,"none")) {
+ if (WORD_STARTS("adns_checkc:")) {
+ if (WORD_IS("none")) {
ads->iflags &= ~adns_if_checkc_freq;
ads->iflags |= adns_if_checkc_entex;
- } else if (!strcmp(word+12,"entex")) {
+ } else if (WORD_IS("entex")) {
ads->iflags &= ~adns_if_checkc_freq;
ads->iflags |= adns_if_checkc_entex;
- } else if (!strcmp(word+12,"freq")) {
+ } else if (WORD_IS("freq")) {
ads->iflags |= adns_if_checkc_freq;
} else {
configparseerr(ads,fn,lno, "option adns_checkc has bad value `%s' "
- "(must be none, entex or freq", word+12);
+ "(must be none, entex or freq", word);
+ }
+ continue;
+ }
+ if (WORD_STARTS("adns_af:")) {
+ ads->iflags &= ~adns_if_afmask;
+ if (!WORD_IS("any")) for (;;) {
+ const char *comma= memchr(word,',',endopt-word);
+ endword=comma?comma:endopt;
+ if (WORD_IS("ipv4"))
+ ads->iflags |= adns_if_permit_ipv4;
+ else if (WORD_IS("ipv6"))
+ ads->iflags |= adns_if_permit_ipv6;
+ else {
+ configparseerr(ads,fn,lno, "option adns_af has bad value `%.*s' "
+ "(must be `any' or list {`ipv4',`ipv6'},...)",
+ (int)(endword-word), word);
+ break;
+ }
+ if (!comma) break;
+ word= comma+1;
}
continue;
}
- adns__diag(ads,-1,0,"%s:%d: unknown option `%.*s'", fn,lno, l,word);
+ if (WORD_IS("adns_ignoreunkcfg")) {
+ ads->config_report_unknown=0;
+ continue;
+ }
+ if (/* adns's query strategy is not configurable */
+ WORD_STARTS("timeout:") ||
+ WORD_STARTS("attempts:") ||
+ WORD_IS("rotate") ||
+ /* adns provides the application with knob for this */
+ WORD_IS("no-check-names") ||
+ /* adns normally does IPv6 if the application wants it; control
+ * this with the adns_af: option if you like */
+ WORD_IS("inet6") ||
+ /* adns does not do edns0 and this is not a problem */
+ WORD_IS("edns0"))
+ continue;
+ if (ads->config_report_unknown)
+ adns__diag(ads,-1,0,"%s:%d: unknown option `%.*s'", fn,lno, l,opt);
}
+
+#undef WORD__IS
+#undef WORD_IS
+#undef WORD_STARTS
}
static void ccf_clearnss(adns_state ads, const char *fn,
adns__diag(ads,-1,0,"%s:%d: yp lookups not supported by adns", fn,lno);
found_bind=-1;
} else {
- adns__diag(ads,-1,0,"%s:%d: unknown `lookup' database `%.*s'",
- fn,lno, l,word);
+ if (ads->config_report_unknown)
+ adns__diag(ads,-1,0,"%s:%d: unknown `lookup' database `%.*s'",
+ fn,lno, l,word);
found_bind=-1;
}
}
adns__diag(ads,-1,0,"%s:%d: `lookup' specified, but not `bind'", fn,lno);
}
+static void ccf_ignore(adns_state ads, const char *fn, int lno,
+ const char *buf) {
+}
+
static const struct configcommandinfo {
const char *name;
void (*fn)(adns_state ads, const char *fn, int lno, const char *buf);
{ "clearnameservers", ccf_clearnss },
{ "include", ccf_include },
{ "lookup", ccf_lookup }, /* OpenBSD */
+ { "lwserver", ccf_ignore }, /* BIND9 lwresd */
{ 0 }
};
!(strlen(ccip->name)==dirl && !memcmp(ccip->name,p,q-p));
ccip++);
if (!ccip->name) {
- adns__diag(ads,-1,0,"%s:%d: unknown configuration directive `%.*s'",
- filename,lno,(int)(q-p),p);
+ if (ads->config_report_unknown)
+ adns__diag(ads,-1,0,"%s:%d: unknown configuration directive `%.*s'",
+ filename,lno,(int)(q-p),p);
continue;
}
while (ctype_whitespace(*q)) q++;
adns_state ads;
pid_t pid;
+ if (flags & ~(adns_initflags)(0x4fff))
+ /* 0x4000 is reserved for `harmless' future expansion */
+ return ENOSYS;
+
ads= malloc(sizeof(*ads)); if (!ads) return errno;
ads->iflags= flags;
LIST_INIT(ads->tcpw);
LIST_INIT(ads->childw);
LIST_INIT(ads->output);
+ LIST_INIT(ads->intdone);
ads->forallnext= 0;
ads->nextid= 0x311f;
- ads->udpsocket= ads->tcpsocket= -1;
+ ads->nudpsockets= 0;
+ ads->tcpsocket= -1;
adns__vbuf_init(&ads->tcpsend);
adns__vbuf_init(&ads->tcprecv);
ads->tcprecv_skip= 0;
ads->tcpstate= server_disconnected;
timerclear(&ads->tcptimeout);
ads->searchlist= 0;
+ ads->config_report_unknown=1;
pid= getpid();
ads->rand48xsubi[0]= pid;
static int init_finish(adns_state ads) {
struct sockaddr_in sin;
struct protoent *proto;
- int i, r;
+ struct udpsocket *udp;
+ int i;
+ int r;
if (!ads->nservers) {
if (ads->logfn && ads->iflags & adns_if_debug)
addserver(ads,(struct sockaddr *)&sin, sizeof(sin));
}
- /* we can't cope with multiple transport address families yet */
- for (i=0; i<ads->nservers; i++)
- assert(ads->servers[i].addr.sa.sa_family==AF_INET);
-
proto= getprotobyname("udp"); if (!proto) { r= ENOPROTOOPT; goto x_free; }
- ads->udpsocket= socket(AF_INET,SOCK_DGRAM,proto->p_proto);
- if (ads->udpsocket<0) { r= errno; goto x_free; }
-
- r= adns__setnonblock(ads,ads->udpsocket);
- if (r) { r= errno; goto x_closeudp; }
+ ads->nudpsockets= 0;
+ for (i=0; i<ads->nservers; i++) {
+ if (adns__udpsocket_by_af(ads, ads->servers[i].addr.sa.sa_family))
+ continue;
+ assert(ads->nudpsockets < MAXUDP);
+ udp= &ads->udpsockets[ads->nudpsockets];
+ udp->af= ads->servers[i].addr.sa.sa_family;
+ udp->fd= socket(udp->af,SOCK_DGRAM,proto->p_proto);
+ if (udp->fd < 0) { r= errno; goto x_free; }
+ ads->nudpsockets++;
+ r= adns__setnonblock(ads,udp->fd);
+ if (r) { r= errno; goto x_closeudp; }
+ }
return 0;
x_closeudp:
- close(ads->udpsocket);
+ for (i=0; i<ads->nudpsockets; i++) close(ads->udpsockets[i].fd);
x_free:
free(ads);
return r;
}
void adns_finish(adns_state ads) {
+ int i;
adns__consistency(ads,0,cc_entex);
for (;;) {
- if (ads->udpw.head) adns_cancel(ads->udpw.head);
- else if (ads->tcpw.head) adns_cancel(ads->tcpw.head);
- else if (ads->childw.head) adns_cancel(ads->childw.head);
- else if (ads->output.head) adns_cancel(ads->output.head);
+ if (ads->udpw.head) adns__cancel(ads->udpw.head);
+ else if (ads->tcpw.head) adns__cancel(ads->tcpw.head);
+ else if (ads->childw.head) adns__cancel(ads->childw.head);
+ else if (ads->output.head) adns__cancel(ads->output.head);
+ else if (ads->intdone.head) adns__cancel(ads->output.head);
else break;
}
- close(ads->udpsocket);
+ for (i=0; i<ads->nudpsockets; i++) close(ads->udpsockets[i].fd);
if (ads->tcpsocket >= 0) close(ads->tcpsocket);
adns__vbuf_free(&ads->tcpsend);
adns__vbuf_free(&ads->tcprecv);