-/**/
-
-#include "adns-internal.h"
-
-void adns__vdiag(adns_state ads, adns_initflags prevent, const char *pfx,
- int serv, const char *fmt, va_list al) {
- if (!(ads->iflags & adns_if_debug) && (!prevent || (ads->iflags & prevent))) return;
- if (serv>=0) {
- fprintf(stderr,"adns%s: nameserver %s: ",pfx,inet_ntoa(ads->servers[serv].addr));
- } else {
- fprintf(stderr,"adns%s: ",pfx);
- }
- vfprintf(stderr,fmt,al);
- fputc('\n',stderr);
-}
-
-void adns__debug(adns_state ads, int serv, const char *fmt, ...) {
- va_list al;
-
- va_start(al,fmt);
- vdiag(ads," debug",0,serv,fmt,al);
- va_end(al);
-}
-
-void adns__swarn(adns_state ads, int serv, const char *fmt, ...) {
- va_list al;
-
- va_start(al,fmt);
- vdiag(ads," warning",adns_if_noerrprint|adns_if_noserverwarn,serv,fmt,al);
- va_end(al);
-}
-
-void adns__diag(adns_state ads, int serv, const char *fmt, ...) {
- va_list al;
-
- va_start(al,fmt);
- vdiag(ads,"",adns_if_noerrprint,serv,fmt,al);
- va_end(al);
-}
-
-static void addserver(adns_state ads, struct in_addr addr) {
+/*
+ * setup.c
+ * - configuration file parsing
+ * - management of global state
+ */
+/*
+ * This file is part of adns, which is
+ * 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 3, 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.
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <limits.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include <sys/types.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include "internal.h"
+
+static void readconfig(adns_state ads, const char *filename, int warnmissing);
+
+static void addserver(adns_state ads, const struct sockaddr *sa, int salen) {
int i;
- struct server *ss;
+ adns_rr_addr *ss;
+ char buf[ADNS_ADDR2TEXT_BUFLEN];
for (i=0; i<ads->nservers; i++) {
- if (ads->servers[i].addr.s_addr == addr.s_addr) {
- debug(ads,"duplicate nameserver %s ignored",inet_ntoa(addr));
+ if (adns__sockaddrs_equal(sa, &ads->servers[i].addr.sa)) {
+ adns__debug(ads,-1,0,"duplicate nameserver %s ignored",
+ adns__sockaddr_ntoa(sa, buf));
return;
}
}
if (ads->nservers>=MAXSERVERS) {
- diag(ads,"too many nameservers, ignoring %s",inet_ntoa(addr));
+ adns__diag(ads,-1,0,"too many nameservers, ignoring %s",
+ adns__sockaddr_ntoa(sa, buf));
return;
}
ss= ads->servers+ads->nservers;
- ss->addr= addr;
- ss->state= server_disc;
- ss->connw.head= ss->connw.tail= 0;
+ assert(salen <= sizeof(ss->addr));
+ ss->len = salen;
+ memcpy(&ss->addr, sa, salen);
ads->nservers++;
}
+static void freesearchlist(adns_state ads) {
+ if (ads->nsearchlist) free(*ads->searchlist);
+ free(ads->searchlist);
+}
+
+static void saveerr(adns_state ads, int en) {
+ if (!ads->configerrno) ads->configerrno= en;
+}
+
static void configparseerr(adns_state ads, const char *fn, int lno,
const char *fmt, ...) {
va_list al;
-
- if (ads->iflags & adns_if_noerrprint) return;
- if (lno==-1) fprintf(stderr,"adns: %s: ",fn);
- else fprintf(stderr,"adns: %s:%d: ",fn,lno);
+
+ saveerr(ads,EINVAL);
+ if (!ads->logfn || (ads->iflags & adns_if_noerrprint)) return;
+
+ if (lno==-1) adns__lprintf(ads,"adns: %s: ",fn);
+ else adns__lprintf(ads,"adns: %s:%d: ",fn,lno);
va_start(al,fmt);
- vfprintf(stderr,fmt,al);
+ adns__vlprintf(ads,fmt,al);
va_end(al);
- fputc('\n',stderr);
+ adns__lprintf(ads,"\n");
}
-static void ccf_nameserver(adns_state ads, const char *fn, int lno, const char *buf) {
- struct in_addr ia;
-
- if (!inet_aton(buf,&ia)) {
+static int nextword(const char **bufp_io, const char **word_r, int *l_r) {
+ const char *p, *q;
+
+ p= *bufp_io;
+ while (ctype_whitespace(*p)) p++;
+ if (!*p) return 0;
+
+ q= p;
+ while (*q && !ctype_whitespace(*q)) q++;
+
+ *l_r= q-p;
+ *word_r= p;
+ *bufp_io= q;
+
+ return 1;
+}
+
+static void ccf_nameserver(adns_state ads, const char *fn,
+ int lno, const char *buf) {
+ 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;
}
- debug(ads,"using nameserver %s",inet_ntoa(ia));
- addserver(ads,ia);
+ 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, int lno, const char *buf) {
+static void ccf_search(adns_state ads, const char *fn,
+ int lno, const char *buf) {
+ const char *bufp, *word;
+ char *newchars, **newptrs, **pp;
+ int count, tl, l;
+
if (!buf) return;
- diag(ads,"warning - `search' ignored FIXME");
+
+ bufp= buf;
+ count= 0;
+ tl= 0;
+ while (nextword(&bufp,&word,&l)) { count++; tl += l+1; }
+
+ newptrs= malloc(sizeof(char*)*count);
+ if (!newptrs) { saveerr(ads,errno); return; }
+
+ newchars= malloc(tl);
+ if (!newchars) { saveerr(ads,errno); free(newptrs); return; }
+
+ bufp= buf;
+ pp= newptrs;
+ while (nextword(&bufp,&word,&l)) {
+ *pp++= newchars;
+ memcpy(newchars,word,l);
+ newchars += l;
+ *newchars++ = 0;
+ }
+
+ freesearchlist(ads);
+ ads->nsearchlist= count;
+ ads->searchlist= newptrs;
}
-static void ccf_sortlist(adns_state ads, const char *fn, int lno, const char *buf) {
- diag(ads,"warning - `sortlist' ignored FIXME");
+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_options(adns_state ads, const char *fn, int lno, const char *buf) {
+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 sortlist *sl;
+ int l;
+ int initial= -1;
+
if (!buf) return;
- diag(ads,"warning - `options' ignored FIXME");
+
+ ads->nsortlist= 0;
+ while (nextword(&buf,&word,&l)) {
+ if (ads->nsortlist >= MAXSORTLIST) {
+ adns__diag(ads,-1,0,"too many sortlist entries,"
+ " ignoring %.*s onwards",l,word);
+ return;
+ }
+
+ if (l >= sizeof(tbuf)) {
+ configparseerr(ads,fn,lno,"sortlist entry `%.*s' too long",l,word);
+ continue;
+ }
+
+ memcpy(tbuf,word,l); tbuf[l]= 0;
+ slash= strchr(tbuf,'/');
+ if (slash) *slash++= 0;
+
+ 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 (slash[strspn(slash, "0123456789")]) {
+ maskwhat = "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>adns__addr_width(sl->base.sa.sa_family)) {
+ configparseerr(ads,fn,lno,"mask length `%s' invalid",slash);
+ continue;
+ }
+ sl->mask.sa.sa_family= sl->base.sa.sa_family;
+ adns__prefix_mask(&sl->mask, initial);
+ }
+ } 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 (!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->nsortlist++;
+ }
}
-static void ccf_clearnss(adns_state ads, const char *fn, int lno, const char *buf) {
+static void ccf_options(adns_state ads, const char *fn,
+ int lno, const char *buf) {
+ 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)) {
+ opt=word;
+ endopt=endword=word+l;
+ if (WORD_IS("debug")) {
+ ads->iflags |= adns_if_debug;
+ continue;
+ }
+ 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,opt);
+ continue;
+ }
+ ads->searchndots= v;
+ continue;
+ }
+ if (WORD_STARTS("adns_checkc:")) {
+ if (WORD_IS("none")) {
+ ads->iflags &= ~adns_if_checkc_freq;
+ ads->iflags |= adns_if_checkc_entex;
+ } else if (WORD_IS("entex")) {
+ ads->iflags &= ~adns_if_checkc_freq;
+ ads->iflags |= adns_if_checkc_entex;
+ } 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);
+ }
+ 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;
+ }
+ 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,
+ int lno, const char *buf) {
ads->nservers= 0;
}
+static void ccf_include(adns_state ads, const char *fn,
+ int lno, const char *buf) {
+ if (!*buf) {
+ configparseerr(ads,fn,lno,"`include' directive with no filename");
+ return;
+ }
+ readconfig(ads,buf,1);
+}
+
+static void ccf_lookup(adns_state ads, const char *fn, int lno,
+ const char *buf) {
+ int found_bind=0;
+ const char *word;
+ int l;
+
+ if (!*buf) {
+ configparseerr(ads,fn,lno,"`lookup' directive with no databases");
+ return;
+ }
+
+ while (nextword(&buf,&word,&l)) {
+ if (l==4 && !memcmp(word,"bind",4)) {
+ found_bind=1;
+ } else if (l==4 && !memcmp(word,"file",4)) {
+ /* ignore this and hope /etc/hosts is not essential */
+ } else if (l==2 && !memcmp(word,"yp",2)) {
+ adns__diag(ads,-1,0,"%s:%d: yp lookups not supported by adns", fn,lno);
+ found_bind=-1;
+ } else {
+ if (ads->config_report_unknown)
+ adns__diag(ads,-1,0,"%s:%d: unknown `lookup' database `%.*s'",
+ fn,lno, l,word);
+ found_bind=-1;
+ }
+ }
+ if (!found_bind)
+ 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);
{ "sortlist", ccf_sortlist },
{ "options", ccf_options },
{ "clearnameservers", ccf_clearnss },
+ { "include", ccf_include },
+ { "lookup", ccf_lookup }, /* OpenBSD */
+ { "lwserver", ccf_ignore }, /* BIND9 lwresd */
{ 0 }
};
-static void readconfig(adns_state ads, const char *filename) {
- char linebuf[2000], *p, *q;
+typedef union {
FILE *file;
- int lno, l, c;
- const struct configcommandinfo *ccip;
-
- file= fopen(filename,"r");
- if (!file) {
- if (errno == ENOENT) {
- debug(ads,"configuration file `%s' does not exist",filename);
- return;
+ const char *text;
+} getline_ctx;
+
+static int gl_file(adns_state ads, getline_ctx *src_io, const char *filename,
+ int lno, char *buf, int buflen) {
+ FILE *file= src_io->file;
+ int c, i;
+ char *p;
+
+ p= buf;
+ buflen--;
+ i= 0;
+
+ for (;;) { /* loop over chars */
+ if (i == buflen) {
+ adns__diag(ads,-1,0,"%s:%d: line too long, ignored",filename,lno);
+ goto x_badline;
+ }
+ c= getc(file);
+ if (!c) {
+ adns__diag(ads,-1,0,"%s:%d: line contains nul, ignored",filename,lno);
+ goto x_badline;
+ } else if (c == '\n') {
+ break;
+ } else if (c == EOF) {
+ if (ferror(file)) {
+ saveerr(ads,errno);
+ adns__diag(ads,-1,0,"%s:%d: read error: %s",
+ filename,lno,strerror(errno));
+ return -1;
+ }
+ if (!i) return -1;
+ break;
+ } else {
+ *p++= c;
+ i++;
}
- diag(ads,"cannot open configuration file `%s': %s",filename,strerror(errno));
- return;
}
- for (lno=1; fgets(linebuf,sizeof(linebuf),file); lno++) {
- l= strlen(linebuf);
- if (!l) continue;
- if (linebuf[l-1] != '\n' && !feof(file)) {
- diag(ads,"%s:%d: line too long",filename,lno);
- while ((c= getc(file)) != EOF && c != '\n') { }
- if (c == EOF) break;
- continue;
- }
+ *p++= 0;
+ return i;
+
+ x_badline:
+ saveerr(ads,EINVAL);
+ while ((c= getc(file)) != EOF && c != '\n');
+ return -2;
+}
+
+static int gl_text(adns_state ads, getline_ctx *src_io, const char *filename,
+ int lno, char *buf, int buflen) {
+ const char *cp= src_io->text;
+ int l;
+
+ if (!cp || !*cp) return -1;
+
+ if (*cp == ';' || *cp == '\n') cp++;
+ l= strcspn(cp,";\n");
+ src_io->text = cp+l;
+
+ if (l >= buflen) {
+ adns__diag(ads,-1,0,"%s:%d: line too long, ignored",filename,lno);
+ saveerr(ads,EINVAL);
+ return -2;
+ }
+
+ memcpy(buf,cp,l);
+ buf[l]= 0;
+ return l;
+}
+
+static void readconfiggeneric(adns_state ads, const char *filename,
+ int (*getline)(adns_state ads, getline_ctx*,
+ const char *filename, int lno,
+ char *buf, int buflen),
+ /* Returns >=0 for success, -1 for EOF or error
+ * (error will have been reported), or -2 for
+ * bad line was encountered, try again.
+ */
+ getline_ctx gl_ctx) {
+ char linebuf[2000], *p, *q;
+ int lno, l, dirl;
+ const struct configcommandinfo *ccip;
+
+ for (lno=1;
+ (l= getline(ads,&gl_ctx, filename,lno, linebuf,sizeof(linebuf))) != -1;
+ lno++) {
+ if (l == -2) continue;
while (l>0 && ctype_whitespace(linebuf[l-1])) l--;
linebuf[l]= 0;
p= linebuf;
while (ctype_whitespace(*p)) p++;
- if (*p == '#' || *p == '\n') continue;
+ if (*p == '#' || *p == ';' || !*p) continue;
q= p;
while (*q && !ctype_whitespace(*q)) q++;
+ dirl= q-p;
for (ccip=configcommandinfos;
- ccip->name && strncmp(ccip->name,p,q-p);
+ ccip->name &&
+ !(strlen(ccip->name)==dirl && !memcmp(ccip->name,p,q-p));
ccip++);
if (!ccip->name) {
- diag(ads,"%s:%d: unknown configuration directive `%.*s'",filename,lno,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++;
ccip->fn(ads,filename,lno,q);
}
- if (ferror(file)) {
- diag(ads,"%s:%d: read error: %s",filename,lno,strerror(errno));
- }
- fclose(file);
}
static const char *instrum_getenv(adns_state ads, const char *envvar) {
const char *value;
value= getenv(envvar);
- if (!value) debug(ads,"environment variable %s not set",envvar);
- else debug(ads,"environment variable %s set to `%s'",envvar,value);
+ if (!value) adns__debug(ads,-1,0,"environment variable %s not set",envvar);
+ else adns__debug(ads,-1,0,"environment variable %s"
+ " set to `%s'",envvar,value);
return value;
}
+static void readconfig(adns_state ads, const char *filename, int warnmissing) {
+ getline_ctx gl_ctx;
+
+ gl_ctx.file= fopen(filename,"r");
+ if (!gl_ctx.file) {
+ if (errno == ENOENT) {
+ if (warnmissing)
+ adns__debug(ads,-1,0, "configuration file"
+ " `%s' does not exist",filename);
+ return;
+ }
+ saveerr(ads,errno);
+ adns__diag(ads,-1,0,"cannot open configuration file `%s': %s",
+ filename,strerror(errno));
+ return;
+ }
+
+ readconfiggeneric(ads,filename,gl_file,gl_ctx);
+
+ fclose(gl_ctx.file);
+}
+
+static void readconfigtext(adns_state ads, const char *text,
+ const char *showname) {
+ getline_ctx gl_ctx;
+
+ gl_ctx.text= text;
+ readconfiggeneric(ads,showname,gl_text,gl_ctx);
+}
+
static void readconfigenv(adns_state ads, const char *envvar) {
const char *filename;
if (ads->iflags & adns_if_noenv) {
- debug(ads,"not checking environment variable `%s'",envvar);
+ adns__debug(ads,-1,0,"not checking environment variable `%s'",envvar);
return;
}
filename= instrum_getenv(ads,envvar);
- if (filename) readconfig(ads,filename);
+ if (filename) readconfig(ads,filename,1);
+}
+
+static void readconfigenvtext(adns_state ads, const char *envvar) {
+ const char *textdata;
+
+ if (ads->iflags & adns_if_noenv) {
+ adns__debug(ads,-1,0,"not checking environment variable `%s'",envvar);
+ return;
+ }
+ textdata= instrum_getenv(ads,envvar);
+ if (textdata) readconfigtext(ads,textdata,envvar);
}
+
+
+int adns__setnonblock(adns_state ads, int fd) {
+ int r;
-int adns_init(adns_state *ads_r, adns_initflags flags) {
+ r= fcntl(fd,F_GETFL,0); if (r<0) return errno;
+ r |= O_NONBLOCK;
+ r= fcntl(fd,F_SETFL,r); if (r<0) return errno;
+ return 0;
+}
+
+static int init_begin(adns_state *ads_r, adns_initflags flags,
+ adns_logcallbackfn *logfn, void *logfndata) {
adns_state ads;
- const char *res_options, *adns_res_options;
- struct protoent *proto;
- int r;
+ 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->tosend.head= ads->tosend.tail= 0;
- ads->timew.head= ads->timew.tail= 0;
- ads->childw.head= ads->childw.tail= 0;
- ads->output.head= ads->output.tail= 0;
- ads->nextid= 0x311f;
- ads->udpsocket= -1;
- ads->qbufavail= 0;
- ads->qbuf= 0;
- ads->tcpbufavail= ads->tcpbufused= ads->tcpbufdone= 0;
- ads->tcpbuf= 0;
- ads->iflags= flags;
- ads->nservers= 0;
+
ads->iflags= flags;
+ ads->logfn= logfn;
+ ads->logfndata= logfndata;
+ ads->configerrno= 0;
+ LIST_INIT(ads->udpw);
+ LIST_INIT(ads->tcpw);
+ LIST_INIT(ads->childw);
+ LIST_INIT(ads->output);
+ LIST_INIT(ads->intdone);
+ ads->forallnext= 0;
+ ads->nextid= 0x311f;
+ ads->nudpsockets= 0;
+ ads->tcpsocket= -1;
+ adns__vbuf_init(&ads->tcpsend);
+ adns__vbuf_init(&ads->tcprecv);
+ ads->tcprecv_skip= 0;
+ ads->nservers= ads->nsortlist= ads->nsearchlist= ads->tcpserver= 0;
+ ads->searchndots= 1;
+ ads->tcpstate= server_disconnected;
+ timerclear(&ads->tcptimeout);
+ ads->searchlist= 0;
+ ads->config_report_unknown=1;
+
+ pid= getpid();
+ ads->rand48xsubi[0]= pid;
+ ads->rand48xsubi[1]= (unsigned long)pid >> 16;
+ ads->rand48xsubi[2]= pid ^ ((unsigned long)pid >> 16);
+
+ *ads_r= ads;
+ return 0;
+}
+
+static int init_finish(adns_state ads) {
+ struct sockaddr_in sin;
+ struct protoent *proto;
+ struct udpsocket *udp;
+ int i;
+ int r;
+
+ if (!ads->nservers) {
+ if (ads->logfn && ads->iflags & adns_if_debug)
+ adns__lprintf(ads,"adns: no nameservers, using IPv4 localhost\n");
+ memset(&sin, 0, sizeof(sin));
+ sin.sin_family = AF_INET;
+ sin.sin_port = htons(DNS_PORT);
+ sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+ addserver(ads,(struct sockaddr *)&sin, sizeof(sin));
+ }
+
+ proto= getprotobyname("udp"); if (!proto) { r= ENOPROTOOPT; goto x_free; }
+ 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:
+ for (i=0; i<ads->nudpsockets; i++) close(ads->udpsockets[i].fd);
+ x_free:
+ free(ads);
+ return r;
+}
+static void init_abort(adns_state ads) {
+ if (ads->nsearchlist) {
+ free(ads->searchlist[0]);
+ free(ads->searchlist);
+ }
+ free(ads);
+}
+
+static void logfn_file(adns_state ads, void *logfndata,
+ const char *fmt, va_list al) {
+ vfprintf(logfndata,fmt,al);
+}
+
+static int init_files(adns_state *ads_r, adns_initflags flags,
+ adns_logcallbackfn *logfn, void *logfndata) {
+ adns_state ads;
+ const char *res_options, *adns_res_options;
+ int r;
+
+ r= init_begin(&ads, flags, logfn, logfndata);
+ if (r) return r;
+
res_options= instrum_getenv(ads,"RES_OPTIONS");
adns_res_options= instrum_getenv(ads,"ADNS_RES_OPTIONS");
ccf_options(ads,"RES_OPTIONS",-1,res_options);
ccf_options(ads,"ADNS_RES_OPTIONS",-1,adns_res_options);
- readconfig(ads,"/etc/resolv.conf");
+ readconfig(ads,"/etc/resolv.conf",1);
+ readconfig(ads,"/etc/resolv-adns.conf",0);
readconfigenv(ads,"RES_CONF");
readconfigenv(ads,"ADNS_RES_CONF");
+ readconfigenvtext(ads,"RES_CONF_TEXT");
+ readconfigenvtext(ads,"ADNS_RES_CONF_TEXT");
+
ccf_options(ads,"RES_OPTIONS",-1,res_options);
ccf_options(ads,"ADNS_RES_OPTIONS",-1,adns_res_options);
ccf_search(ads,"LOCALDOMAIN",-1,instrum_getenv(ads,"LOCALDOMAIN"));
ccf_search(ads,"ADNS_LOCALDOMAIN",-1,instrum_getenv(ads,"ADNS_LOCALDOMAIN"));
- if (!ads->nservers) {
- struct in_addr ia;
- if (ads->iflags & adns_if_debug)
- fprintf(stderr,"adns: no nameservers, using localhost\n");
- ia.s_addr= INADDR_LOOPBACK;
- addserver(ads,ia);
+ if (ads->configerrno && ads->configerrno != EINVAL) {
+ r= ads->configerrno;
+ init_abort(ads);
+ return r;
}
- proto= getprotobyname("udp"); if (!proto) { r= ENOPROTOOPT; goto x_free; }
- ads->udpsocket= socket(AF_INET,SOCK_DGRAM,proto->p_proto);
- if (!ads->udpsocket) { r= errno; goto x_closeudp; }
-
+ r= init_finish(ads);
+ if (r) return r;
+
+ adns__consistency(ads,0,cc_entex);
*ads_r= ads;
return 0;
+}
- x_closeudp:
- close(ads->udpsocket);
- x_free:
+int adns_init(adns_state *ads_r, adns_initflags flags, FILE *diagfile) {
+ return init_files(ads_r, flags, logfn_file, diagfile ? diagfile : stderr);
+}
+
+static int init_strcfg(adns_state *ads_r, adns_initflags flags,
+ adns_logcallbackfn *logfn, void *logfndata,
+ const char *configtext) {
+ adns_state ads;
+ int r;
+
+ r= init_begin(&ads, flags, logfn, logfndata);
+ if (r) return r;
+
+ readconfigtext(ads,configtext,"<supplied configuration text>");
+ if (ads->configerrno) {
+ r= ads->configerrno;
+ init_abort(ads);
+ return r;
+ }
+
+ r= init_finish(ads); if (r) return r;
+ adns__consistency(ads,0,cc_entex);
+ *ads_r= ads;
+ return 0;
+}
+
+int adns_init_strcfg(adns_state *ads_r, adns_initflags flags,
+ FILE *diagfile, const char *configtext) {
+ return init_strcfg(ads_r, flags,
+ diagfile ? logfn_file : 0, diagfile,
+ configtext);
+}
+
+int adns_init_logfn(adns_state *newstate_r, adns_initflags flags,
+ const char *configtext /*0=>use default config files*/,
+ adns_logcallbackfn *logfn /*0=>logfndata is a FILE* */,
+ void *logfndata /*0 with logfn==0 => discard*/) {
+ if (!logfn && logfndata)
+ logfn= logfn_file;
+ if (configtext)
+ return init_strcfg(newstate_r, flags, logfn, logfndata, configtext);
+ else
+ return init_files(newstate_r, flags, logfn, logfndata);
+}
+
+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);
+ else if (ads->intdone.head) adns__cancel(ads->output.head);
+ else break;
+ }
+ 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);
+ freesearchlist(ads);
free(ads);
- return r;
}
-int adns_finish(adns_state ads) {
- abort(); /* FIXME */
+void adns_forallqueries_begin(adns_state ads) {
+ adns__consistency(ads,0,cc_entex);
+ ads->forallnext=
+ ads->udpw.head ? ads->udpw.head :
+ ads->tcpw.head ? ads->tcpw.head :
+ ads->childw.head ? ads->childw.head :
+ ads->output.head;
+}
+
+adns_query adns_forallqueries_next(adns_state ads, void **context_r) {
+ adns_query qu, nqu;
+
+ adns__consistency(ads,0,cc_entex);
+ nqu= ads->forallnext;
+ for (;;) {
+ qu= nqu;
+ if (!qu) return 0;
+ if (qu->next) {
+ nqu= qu->next;
+ } else if (qu == ads->udpw.tail) {
+ nqu=
+ ads->tcpw.head ? ads->tcpw.head :
+ ads->childw.head ? ads->childw.head :
+ ads->output.head;
+ } else if (qu == ads->tcpw.tail) {
+ nqu=
+ ads->childw.head ? ads->childw.head :
+ ads->output.head;
+ } else if (qu == ads->childw.tail) {
+ nqu= ads->output.head;
+ } else {
+ nqu= 0;
+ }
+ if (!qu->parent) break;
+ }
+ ads->forallnext= nqu;
+ if (context_r) *context_r= qu->ctx.ext;
+ return qu;
}
~ianmdlvl / adns.git / blobdiff