* - management of global state
*/
/*
- * This file is part of adns, which is Copyright (C) 1997, 1998 Ian Jackson
+ * This file is part of adns, which is Copyright (C) 1997-1999 Ian Jackson
*
* 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
#include <stdlib.h>
#include <errno.h>
-#include <string.h>
+#include <limits.h>
#include <unistd.h>
#include <fcntl.h>
#include <netdb.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
#include <arpa/inet.h>
#include "internal.h"
fputc('\n',ads->diagfile);
}
+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) {
struct in_addr ia;
}
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;
- adns__diag(ads,-1,0,"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;
+ }
+
+ free(ads->searchlist);
+ ads->nsearchlist= count;
+ ads->searchlist= newptrs;
}
static void ccf_sortlist(adns_state ads, const char *fn, int lno, const char *buf) {
- adns__diag(ads,-1,0,"warning - `sortlist' ignored fixme");
+ const char *word;
+ char tbuf[200], *slash, *ep;
+ struct in_addr base, mask;
+ int l;
+ unsigned long initial, baselocal;
+
+ if (!buf) return;
+
+ 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;
+
+ if (!inet_aton(tbuf,&base)) {
+ configparseerr(ads,fn,lno,"invalid address `%s' in sortlist",tbuf);
+ continue;
+ }
+
+ if (slash) {
+ if (strchr(slash,'.')) {
+ if (!inet_aton(slash,&mask)) {
+ configparseerr(ads,fn,lno,"invalid mask `%s' in sortlist",slash);
+ continue;
+ }
+ if (base.s_addr & ~mask.s_addr) {
+ configparseerr(ads,fn,lno,
+ "mask `%s' in sortlist overlaps address `%s'",slash,tbuf);
+ continue;
+ }
+ } else {
+ initial= strtoul(slash,&ep,10);
+ if (*ep || initial>32) {
+ configparseerr(ads,fn,lno,"mask length `%s' invalid",slash);
+ continue;
+ }
+ mask.s_addr= htonl((0x0ffffffffUL) << (32-initial));
+ }
+ } else {
+ 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 {
+ configparseerr(ads,fn,lno,
+ "network address `%s' in sortlist is not in classed ranges,"
+ " must specify mask explicitly", tbuf);
+ continue;
+ }
+ }
+
+ ads->sortlist[ads->nsortlist].base= base;
+ ads->sortlist[ads->nsortlist].mask= mask;
+ ads->nsortlist++;
+ }
}
static void ccf_options(adns_state ads, const char *fn, int lno, const char *buf) {
+ const char *word;
+ char *ep;
+ unsigned long v;
+ int l;
+
if (!buf) return;
- adns__diag(ads,-1,0,"warning - `options' ignored fixme");
+
+ while (nextword(&buf,&word,&l)) {
+ if (l==5 && !memcmp(word,"debug",5)) {
+ 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) {
+ configparseerr(ads,fn,lno,"option `%.*s' malformed or has bad value",l,word);
+ continue;
+ }
+ ads->searchndots= v;
+ continue;
+ }
+ if (l>=12 && !memcmp(word,"adns_checkc:",12)) {
+ if (!strcmp(word+12,"none")) {
+ ads->iflags &= ~adns_if_checkc_freq;
+ ads->iflags |= adns_if_checkc_entex;
+ } else if (!strcmp(word+12,"entex")) {
+ ads->iflags &= ~adns_if_checkc_freq;
+ ads->iflags |= adns_if_checkc_entex;
+ } else if (!strcmp(word+12,"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);
+ }
+ continue;
+ }
+ adns__diag(ads,-1,0,"%s:%d: unknown option `%.*s'", fn,lno, l,word);
+ }
}
static void ccf_clearnss(adns_state ads, const char *fn, int lno, const char *buf) {
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, *nn;
+ const char *cp= src_io->text;
int l;
- if (!cp) return -1;
-
- nn= strchr(cp,'\n');
+ if (!cp || !*cp) return -1;
- l= nn ? nn-cp : strlen(cp);
- src_io->text= nn ? nn+1 : 0;
+ 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);
if (filename) readconfig(ads,filename);
}
+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;
ads->iflags= flags;
ads->diagfile= diagfile;
+ ads->configerrno= 0;
LIST_INIT(ads->timew);
LIST_INIT(ads->childw);
LIST_INIT(ads->output);
+ ads->forallnext= 0;
ads->nextid= 0x311f;
ads->udpsocket= ads->tcpsocket= -1;
adns__vbuf_init(&ads->tcpsend);
adns__vbuf_init(&ads->tcprecv);
- ads->nservers= ads->tcpserver= 0;
+ ads->nservers= ads->nsortlist= ads->nsearchlist= ads->tcpserver= 0;
+ ads->searchndots= 1;
ads->tcpstate= server_disconnected;
timerclear(&ads->tcptimeout);
+ ads->searchlist= 0;
*ads_r= ads;
return 0;
if (!ads->nservers) {
if (ads->diagfile && ads->iflags & adns_if_debug)
fprintf(ads->diagfile,"adns: no nameservers, using localhost\n");
- ia.s_addr= INADDR_LOOPBACK;
+ ia.s_addr= htonl(INADDR_LOOPBACK);
addserver(ads,ia);
}
return r;
}
+static void init_abort(adns_state ads) {
+ if (ads->nsearchlist) {
+ free(ads->searchlist[0]);
+ free(ads->searchlist);
+ }
+ free(ads);
+}
+
int adns_init(adns_state *ads_r, adns_initflags flags, FILE *diagfile) {
adns_state ads;
const char *res_options, *adns_res_options;
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->configerrno && ads->configerrno != EINVAL) {
+ 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;
}
readconfigtext(ads,configtext,"<supplied configuration text>");
if (ads->configerrno) {
r= ads->configerrno;
- free(ads);
+ init_abort(ads);
return r;
}
r= init_finish(ads); if (r) return r;
+ adns__consistency(ads,0,cc_entex);
*ads_r= ads;
return 0;
}
+
void adns_finish(adns_state ads) {
+ adns__consistency(ads,0,cc_entex);
for (;;) {
if (ads->timew.head) adns_cancel(ads->timew.head);
else if (ads->childw.head) adns_cancel(ads->childw.head);
adns__vbuf_free(&ads->tcprecv);
free(ads);
}
+
+void adns_forallqueries_begin(adns_state ads) {
+ adns__consistency(ads,0,cc_entex);
+ ads->forallnext=
+ ads->timew.head ? ads->timew.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->timew.tail) {
+ if (ads->childw.head) {
+ nqu= ads->childw.head;
+ } else {
+ nqu= 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;
+}
+
+void adns__checkqueues(adns_state ads) {
+ adns_forallqueries_begin(ads);
+ while (adns_forallqueries_next(ads,0));
+}
~mdw / adns / blobdiff