-/**/
-
-#include "adns-internal.h"
-
-static void vdebug(adns_state ads, const char *fmt, va_list al) {
- if (!(ads->iflags & adns_if_debug)) return;
- fputs("adns debug: ",stderr);
- vfprintf(stderr,fmt,al);
- fputc('\n',stderr);
-}
-
-void adns__debug(adns_state ads, const char *fmt, ...) {
- va_list al;
-
- va_start(al,fmt);
- vdebug(ads,fmt,al);
- va_end(al);
-}
-
-static void vdiag(adns_state ads, const char *fmt, va_list al) {
- if (ads->iflags & adns_if_noerrprint) return;
- fputs("adns: ",stderr);
- vfprintf(stderr,fmt,al);
- fputc('\n',stderr);
-}
-
-void adns__diag(adns_state ads, const char *fmt, ...) {
- va_list al;
-
- va_start(al,fmt);
- vdiag(ads,fmt,al);
- va_end(al);
-}
+/*
+ * setup.c
+ * - configuration file parsing
+ * - management of global state
+ */
+/*
+ * This file is part of adns, which is Copyright (C) 1997, 1998 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
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include <netdb.h>
+#include <arpa/inet.h>
+
+#include "internal.h"
+
+static void readconfig(adns_state ads, const char *filename);
static void addserver(adns_state ads, struct in_addr addr) {
int i;
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));
+ adns__debug(ads,-1,0,"duplicate nameserver %s ignored",inet_ntoa(addr));
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",inet_ntoa(addr));
return;
}
ss= ads->servers+ads->nservers;
ss->addr= addr;
- ss->state= server_disc;
- ss->connw.head= ss->connw.tail= 0;
ads->nservers++;
}
+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->diagfile || (ads->iflags & adns_if_noerrprint)) return;
+
+ if (lno==-1) fprintf(ads->diagfile,"adns: %s: ",fn);
+ else fprintf(ads->diagfile,"adns: %s:%d: ",fn,lno);
va_start(al,fmt);
- vfprintf(stderr,fmt,al);
+ vfprintf(ads->diagfile,fmt,al);
va_end(al);
- fputc('\n',stderr);
+ fputc('\n',ads->diagfile);
}
static void ccf_nameserver(adns_state ads, const char *fn, int lno, const char *buf) {
configparseerr(ads,fn,lno,"invalid nameserver address `%s'",buf);
return;
}
- debug(ads,"using nameserver %s",inet_ntoa(ia));
+ adns__debug(ads,-1,0,"using nameserver %s",inet_ntoa(ia));
addserver(ads,ia);
}
static void ccf_search(adns_state ads, const char *fn, int lno, const char *buf) {
if (!buf) return;
- diag(ads,"warning - `search' ignored FIXME");
+ adns__diag(ads,-1,0,"warning - `search' ignored fixme");
}
static void ccf_sortlist(adns_state ads, const char *fn, int lno, const char *buf) {
- diag(ads,"warning - `sortlist' ignored FIXME");
+ adns__diag(ads,-1,0,"warning - `sortlist' ignored fixme");
}
static void ccf_options(adns_state ads, const char *fn, int lno, const char *buf) {
if (!buf) return;
- diag(ads,"warning - `options' ignored FIXME");
+ adns__diag(ads,-1,0,"warning - `options' ignored fixme");
}
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);
+}
+
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 },
{ 0 }
};
-static int ctype_whitespace(int c) { return c==' ' || c=='\n' || c=='\t'; }
-static int ctype_digit(int c) { return c>='0' && c<='9'; }
-
-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, *nn;
+ int l;
+
+ if (!cp) return -1;
+
+ nn= strchr(cp,'\n');
+
+ l= nn ? nn-cp : strlen(cp);
+ src_io->text= nn ? nn+1 : 0;
+
+ 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) 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);
+ adns__diag(ads,-1,0,"%s:%d: unknown configuration directive `%.*s'",
+ filename,lno,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) {
+ getline_ctx gl_ctx;
+
+ gl_ctx.file= fopen(filename,"r");
+ if (!gl_ctx.file) {
+ if (errno == ENOENT) {
+ 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);
}
+
+
+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, FILE *diagfile) {
adns_state ads;
- const char *res_options, *adns_res_options;
- struct protoent *proto;
- int r;
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->diagfile= diagfile;
+ LIST_INIT(ads->timew);
+ LIST_INIT(ads->childw);
+ LIST_INIT(ads->output);
+ ads->nextid= 0x311f;
+ ads->udpsocket= ads->tcpsocket= -1;
+ adns__vbuf_init(&ads->tcpsend);
+ adns__vbuf_init(&ads->tcprecv);
+ ads->nservers= ads->tcpserver= 0;
+ ads->tcpstate= server_disconnected;
+ timerclear(&ads->tcptimeout);
+
+ *ads_r= ads;
+ return 0;
+}
+
+static int init_finish(adns_state ads) {
+ struct in_addr ia;
+ struct protoent *proto;
+ int r;
+
+ 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;
+ addserver(ads,ia);
+ }
+
+ 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; }
+
+ return 0;
+
+ x_closeudp:
+ close(ads->udpsocket);
+ x_free:
+ free(ads);
+ return r;
+}
+int adns_init(adns_state *ads_r, adns_initflags flags, FILE *diagfile) {
+ adns_state ads;
+ const char *res_options, *adns_res_options;
+ int r;
+
+ r= init_begin(&ads, flags, diagfile ? diagfile : stderr);
+ 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_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);
+ r= init_finish(ads);
+ if (r) return r;
+
+ *ads_r= ads;
+ return 0;
+}
+
+int adns_init_strcfg(adns_state *ads_r, adns_initflags flags,
+ FILE *diagfile, const char *configtext) {
+ adns_state ads;
+ int r;
+
+ r= init_begin(&ads, flags, diagfile); if (r) return r;
+
+ readconfigtext(ads,configtext,"<supplied configuration text>");
+ if (ads->configerrno) {
+ r= ads->configerrno;
+ free(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;
*ads_r= ads;
return 0;
+}
- x_closeudp:
+void adns_finish(adns_state ads) {
+ for (;;) {
+ if (ads->timew.head) adns_cancel(ads->timew.head);
+ else if (ads->childw.head) adns_cancel(ads->childw.head);
+ else if (ads->output.head) adns_cancel(ads->output.head);
+ else break;
+ }
close(ads->udpsocket);
- x_free:
+ if (ads->tcpsocket >= 0) close(ads->tcpsocket);
+ adns__vbuf_free(&ads->tcpsend);
+ adns__vbuf_free(&ads->tcprecv);
free(ads);
- return r;
-}
-
-int adns_finish(adns_state ads) {
- abort(); /* FIXME */
}
~ianmdlvl / adns.git / blobdiff