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Diffstat (limited to 'adns-0.6/src/setup.c')
-rw-r--r--adns-0.6/src/setup.c643
1 files changed, 0 insertions, 643 deletions
diff --git a/adns-0.6/src/setup.c b/adns-0.6/src/setup.c
deleted file mode 100644
index ac88c33..0000000
--- a/adns-0.6/src/setup.c
+++ /dev/null
@@ -1,643 +0,0 @@
-/*
- * setup.c
- * - configuration file parsing
- * - management of global state
- */
-/*
- * This file is
- * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
- *
- * It is part of adns, which is
- * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
- * Copyright (C) 1999 Tony Finch <dot@dotat.at>
- *
- * 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 <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"
-
-static void readconfig(adns_state ads, const char *filename, int warnmissing);
-
-static void addserver(adns_state ads, struct in_addr addr) {
- int i;
- struct server *ss;
-
- for (i=0; i<ads->nservers; i++) {
- if (ads->servers[i].addr.s_addr == addr.s_addr) {
- adns__debug(ads,-1,0,"duplicate nameserver %s ignored",inet_ntoa(addr));
- return;
- }
- }
-
- if (ads->nservers>=MAXSERVERS) {
- adns__diag(ads,-1,0,"too many nameservers, ignoring %s",inet_ntoa(addr));
- return;
- }
-
- ss= ads->servers+ads->nservers;
- ss->addr= addr;
- 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;
-
- 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(ads->diagfile,fmt,al);
- va_end(al);
- 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;
-
- if (!inet_aton(buf,&ia)) {
- configparseerr(ads,fn,lno,"invalid nameserver address `%s'",buf);
- return;
- }
- 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) {
- const char *bufp, *word;
- char *newchars, **newptrs, **pp;
- int count, tl, l;
-
- if (!buf) return;
-
- 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) {
- 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;
-
- 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) {
- 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 const struct configcommandinfo {
- const char *name;
- void (*fn)(adns_state ads, const char *fn, int lno, const char *buf);
-} configcommandinfos[]= {
- { "nameserver", ccf_nameserver },
- { "domain", ccf_search },
- { "search", ccf_search },
- { "sortlist", ccf_sortlist },
- { "options", ccf_options },
- { "clearnameservers", ccf_clearnss },
- { "include", ccf_include },
- { 0 }
-};
-
-typedef union {
- FILE *file;
- 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++;
- }
- }
-
- *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) continue;
- q= p;
- while (*q && !ctype_whitespace(*q)) q++;
- dirl= q-p;
- for (ccip=configcommandinfos;
- ccip->name && !(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,q-p,p);
- continue;
- }
- while (ctype_whitespace(*q)) q++;
- ccip->fn(ads,filename,lno,q);
- }
-}
-
-static const char *instrum_getenv(adns_state ads, const char *envvar) {
- const char *value;
-
- value= getenv(envvar);
- 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) {
- adns__debug(ads,-1,0,"not checking environment variable `%s'",envvar);
- return;
- }
- filename= instrum_getenv(ads,envvar);
- 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;
-
- 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;
-
- ads= malloc(sizeof(*ads)); if (!ads) return errno;
-
- ads->iflags= flags;
- ads->diagfile= diagfile;
- ads->configerrno= 0;
- LIST_INIT(ads->udpw);
- LIST_INIT(ads->tcpw);
- 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->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_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= htonl(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;
-}
-
-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;
- 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_options(ads,"ADNS_RES_OPTIONS",-1,adns_res_options);
-
- 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->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;
-}
-
-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;
- 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->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 break;
- }
- close(ads->udpsocket);
- if (ads->tcpsocket >= 0) close(ads->tcpsocket);
- adns__vbuf_free(&ads->tcpsend);
- adns__vbuf_free(&ads->tcprecv);
- freesearchlist(ads);
- free(ads);
-}
-
-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;
-}
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