X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=client%2Fadnsresfilter.c;h=3e5255cac2b2302ca92a8ee34c7236a4b0cb7f64;hb=9b5218c341a6d6b37a12260f171e9007b9eb9908;hp=136929d24fdfb2589bb6800fe98abdba0662fc04;hpb=41559f53541ae03b5647c41c42883dc4b78634d9;p=adns.git

diff --git a/client/adnsresfilter.c b/client/adnsresfilter.c
index 136929d..3e5255c 100644
--- a/client/adnsresfilter.c
+++ b/client/adnsresfilter.c
@@ -3,16 +3,16 @@
  * - filter which does resolving, not part of the library
  */
 /*
- *  This file is
- *    Copyright (C) 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 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 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,
@@ -21,8 +21,7 @@
  *  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 <stdio.h>
@@ -33,25 +32,33 @@
 #include <assert.h>
 #include <ctype.h>
 
-#include <sys/fcntl.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <fcntl.h>
 
-#include "adns.h"
 #include "config.h"
+#include "adns.h"
 #include "dlist.h"
 #include "tvarith.h"
+#include "client.h"
+
+#ifdef ADNS_REGRESS_TEST
+# include "hredirect.h"
+#endif
 
 struct outqueuenode {
   struct outqueuenode *next, *back;
-  void *buffer;
-  char *textp;
+  char *buffer, *textp;
   int textlen;
   struct timeval printbefore;
   struct treething *addr;
 };
 
-static int bracket, forever;
-static unsigned long timeout=100;
+static int bracket, forever, address;
+static unsigned long timeout= 1000;
 static adns_rrtype rrt= adns_r_ptr;
+static adns_initflags initflags= 0;
+static const char *config_text;
 
 static int outblocked, inputeof;
 static struct { struct outqueuenode *head, *tail; } outqueue;
@@ -60,7 +67,7 @@ static int peroutqueuenode, outqueuelen;
 static struct sockaddr_in sa;
 static adns_state ads;
 
-static char addrtextbuf[14];
+static char addrtextbuf[18]; /* [ddd.ddd.ddd.ddd] + nul */
 static int cbyte, inbyte, inbuf;
 static unsigned char bytes[4];
 static struct timeval printbefore;
@@ -84,8 +91,7 @@ static int nonblock(int fd, int isnonblock) {
   return 0;
 }
 
-static void quit(int exitstatus) NONRETURNING;
-static void quit(int exitstatus) {
+void quitnow(int exitstatus) {
   nonblock(0,0);
   nonblock(1,0);
   exit(exitstatus);
@@ -94,7 +100,7 @@ static void quit(int exitstatus) {
 static void sysfail(const char *what) NONRETURNING;
 static void sysfail(const char *what) {
   fprintf(stderr,"adnsresfilter: system call failed: %s: %s\n",what,strerror(errno));
-  quit(2);
+  quitnow(2);
 }
 
 static void *xmalloc(size_t sz) {
@@ -108,25 +114,31 @@ static void outputerr(void) { sysfail("write to stdout"); }
 
 static void usage(void) {
   if (printf("usage: adnsresfilter [<options ...>]\n"
-	     "       adnsresfilter  -h|--help\n"
-	     "options: -b|--brackets\n"
-	     "         -w|--wait\n"
-	     "         -t<timeout>|--timeout <milliseconds>\n"
-	     "         -u|--unchecked\n")
+	     "       adnsresfilter  -h|--help | --version\n"
+	     "options: -t<milliseconds>|--timeout <milliseconds>\n"
+	     "         -w|--wait        (always wait for queries to time out or fail)\n"
+	     "         -b|--brackets    (require [...] around IP addresses)\n"
+	     "         -a|--address     (always include [address] in output)\n"
+	     "         -u|--unchecked   (do not forward map for checking)\n"
+	     "         --config <text>  (use this instead of resolv.conf)\n"
+	     "         --debug          (turn on adns resolver debugging)\n"
+	     "Timeout is the maximum amount to delay any particular bit of output for.\n"
+	     "Lookups will go on in the background.  Default timeout = 1000 (ms).\n")
       == EOF) outputerr();
+  if (fflush(stdout)) sysfail("flush stdout");
 }
 
 static void usageerr(const char *why) NONRETURNING;
 static void usageerr(const char *why) {
   fprintf(stderr,"adnsresfilter: bad usage: %s\n",why);
   usage();
-  quit(1);
+  quitnow(1);
 }
 
 static void adnsfail(const char *what, int e) NONRETURNING;
 static void adnsfail(const char *what, int e) {
   fprintf(stderr,"adnsresfilter: adns call failed: %s: %s\n",what,strerror(e));
-  quit(2);
+  quitnow(2);
 }
 
 static void settimeout(const char *arg) {
@@ -142,43 +154,55 @@ static void parseargs(const char *const *argv) {
   while ((arg= *++argv)) {
     if (arg[0] != '-') usageerr("no non-option arguments are allowed");
     if (arg[1] == '-') {
-      if (!strcmp(arg,"--brackets")) {
+      if (!strcmp(arg,"--timeout")) {
+	if (!(arg= *++argv)) usageerr("--timeout needs a value");
+	settimeout(arg);
+	forever= 0;
+      } else if (!strcmp(arg,"--wait")) {
+	forever= 1;
+      } else if (!strcmp(arg,"--brackets")) {
 	bracket= 1;
+      } else if (!strcmp(arg,"--address")) {
+	address= 1;
       } else if (!strcmp(arg,"--unchecked")) {
 	rrt= adns_r_ptr_raw;
-      } else if (!strcmp(arg,"--wait")) {
-	forever= 1;
+      } else if (!strcmp(arg,"--config")) {
+	if (!(arg= *++argv)) usageerr("--config needs a value");
+	config_text= arg;
+      } else if (!strcmp(arg,"--debug")) {
+	initflags |= adns_if_debug;
       } else if (!strcmp(arg,"--help")) {
-	usage(); quit(0);
-      } else if (!strcmp(arg,"--timeout")) {
-	if (!(arg= *++argv)) usageerr("--timeout needs a value");
-	settimeout(arg);
-	forever= 0;
+	usage(); quitnow(0);
+      } else if (!strcmp(arg,"--version")) {
+	VERSION_PRINT_QUIT("adnsresfilter"); quitnow(0);
       } else {
 	usageerr("unknown long option");
       }
     } else {
       while ((c= *++arg)) {
 	switch (c) {
+	case 't':
+	  if (*++arg) settimeout(arg);
+	  else if ((arg= *++argv)) settimeout(arg);
+	  else usageerr("-t needs a value");
+	  forever= 0;
+	  arg= "\0";
+	  break;
+	case 'w':
+	  forever= 1;
+	  break;
 	case 'b':
 	  bracket= 1;
 	  break;
+	case 'a':
+	  address= 1;
+	  break;
 	case 'u':
 	  rrt= adns_r_ptr_raw;
 	  break;
-	case 'w':
-	  forever= 1;
-	  break;
 	case 'h':
 	  usage();
-	  quit(0);
-	case 't':
-	  if (*++arg) settimeout(arg);
-	  else if ((arg= *++argv)) settimeout(arg);
-	  else usageerr("-t needs a value");
-	  forever= 0;
-	  arg= "\0";
-	  break;
+	  quitnow(0);
 	default:
 	  usageerr("unknown short option");
 	}
@@ -191,7 +215,8 @@ static void queueoutchar(int c) {
   struct outqueuenode *entry;
   
   entry= outqueue.tail;
-  if (!entry || entry->addr || entry->textlen >= peroutqueuenode) {
+  if (!entry || entry->addr ||
+      entry->textlen >= peroutqueuenode - (entry->textp - entry->buffer)) {
     peroutqueuenode= !peroutqueuenode || !entry || entry->addr ? 128 : 
       peroutqueuenode >= 1024 ? 4096 : peroutqueuenode<<2;
     entry= xmalloc(sizeof(*entry));
@@ -232,10 +257,24 @@ static void writestdout(struct outqueuenode *entry) {
 }
 
 static void replacetextwithname(struct outqueuenode *entry) {
-  free(entry->buffer);
-  entry->buffer= 0;
-  entry->textp= entry->addr->ans->rrs.str[0];
-  entry->textlen= strlen(entry->textp);
+  char *name, *newbuf;
+  int namelen, newlen;
+
+  name= entry->addr->ans->rrs.str[0];
+  namelen= strlen(name);
+  if (!address) {
+    free(entry->buffer);
+    entry->buffer= 0;
+    entry->textp= name;
+    entry->textlen= namelen;
+  } else {
+    newlen= entry->textlen + namelen + (bracket ? 0 : 2);
+    newbuf= xmalloc(newlen + 1);
+    sprintf(newbuf, bracket ? "%s%.*s" : "%s[%.*s]", name, entry->textlen, entry->textp);
+    free(entry->buffer);
+    entry->buffer= entry->textp= newbuf;
+    entry->textlen= newlen;
+  }
 }
 
 static void checkadnsqueries(void) {
@@ -347,7 +386,6 @@ static void readstdin(void) {
       if (!bracket && !isalnum(c)) startaddr();
     }
   }
-  if (cbyte==3 && inbyte>0 && !bracket) procaddr();
 }
 
 static void startup(void) {
@@ -357,7 +395,12 @@ static void startup(void) {
   if (nonblock(1,1)) sysfail("set stdout to nonblocking mode");
   memset(&sa,0,sizeof(sa));
   sa.sin_family= AF_INET;
-  r= adns_init(&ads,0,0);  if (r) adnsfail("init",r);
+  if (config_text) {
+    r= adns_init_strcfg(&ads,initflags,stderr,config_text);
+  } else {
+    r= adns_init(&ads,initflags,0);
+  }
+  if (r) adnsfail("init",r);
   cbyte= -1;
   inbyte= -1;
   inbuf= 0;
@@ -426,7 +469,6 @@ int main(int argc, const char *const *argv) {
   }
   if (nonblock(0,0)) sysfail("un-nonblock stdin");
   if (nonblock(1,0)) sysfail("un-nonblock stdout");
-  if (ferror(stdin) || fclose(stdin)) sysfail("read stdin");
-  if (fclose(stdout)) sysfail("close stdout");
+  adns_finish(ads);
   exit(0);
 }