Config parsing: Ignore some BIND9-specific resolv.conf options

Debian #411263.  I also read wheezy's resolv.conf(5).

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

5 files changed, 64 insertions, 0 deletions

diff --git a/regress/case-unkopts.err b/regress/case-unkopts.err
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/regress/case-unkopts.err
diff --git a/regress/case-unkopts.out b/regress/case-unkopts.out
new file mode 100644
index 0000000..5117bf3
--- /dev/null
+++ b/regress/case-unkopts.out
@@ -0,0 +1,7 @@
+adns debug: using nameserver 172.18.45.6
+adns: <supplied configuration text>:5: unknown option `wombat'
+adns: <supplied configuration text>:6: unknown configuration directive `stoat'
+chiark.greenend.org.uk flags 0 type 1 A(-) submitted
+chiark.greenend.org.uk flags 0 type A(-): OK; nrrs=1; cname=$; owner=$; ttl=3600
+ 212.13.197.229
+rc=0
diff --git a/regress/case-unkopts.sys b/regress/case-unkopts.sys
new file mode 100644
index 0000000..dadf4c3
--- /dev/null
+++ b/regress/case-unkopts.sys
@@ -0,0 +1,34 @@
+./adnstest unkopts
+:0x0|1 chiark.greenend.org.uk
+ start 1414184606.322883
+ socket domain=AF_INET type=SOCK_DGRAM
+ socket=6
+ +0.000116
+ fcntl fd=6 cmd=F_GETFL
+ fcntl=~O_NONBLOCK&...
+ +0.000047
+ fcntl fd=6 cmd=F_SETFL O_NONBLOCK|...
+ fcntl=OK
+ +0.000040
+ sendto fd=6 addr=172.18.45.6:53
+     311f0100 00010000 00000000 06636869 61726b08 67726565 6e656e64 036f7267
+     02756b00 00010001.
+ sendto=40
+ +0.000202
+ select max=7 rfds=[6] wfds=[] efds=[] to=1.999798
+ select=1 rfds=[6] wfds=[] efds=[]
+ +0.002958
+ recvfrom fd=6 buflen=512
+ recvfrom=OK addr=172.18.45.6:53
+     311f8580 00010001 00020002 06636869 61726b08 67726565 6e656e64 036f7267
+     02756b00 00010001 c00c0001 00010000 0e100004 d40dc5e5 c0130002 00010001
+     51800011 036e7331 0a72656c 61746976 697479c0 13c01300 02000100 01518000
+     06036e73 30c048c0 61000100 01000151 800004ac 122d06c0 44000100 01000151
+     800004ac 122d0b.
+ +0.000383
+ recvfrom fd=6 buflen=512
+ recvfrom=EAGAIN
+ +0.000138
+ close fd=6
+ close=OK
+ +0.000180
diff --git a/regress/init-unkopts.text b/regress/init-unkopts.text
new file mode 100644
index 0000000..2688162
--- /dev/null
+++ b/regress/init-unkopts.text
@@ -0,0 +1,6 @@
+nameserver 172.18.45.6
+sortlist 127.0.0.1/32 172.18.45.0/28 172.18.45.0/24
+search davenant.greenend.org.uk greenend.org.uk
+lwserver 127.0.0.1
+options timeout:1 attempts:30 rotate no-check-names inet6 edns0 wombat
+stoat
diff --git a/src/setup.c b/src/setup.c
index 3ebcd21..17a0d8e 100644
--- a/src/setup.c
+++ b/src/setup.c
@@ -321,6 +321,18 @@ static void ccf_options(adns_state ads, const char *fn,
       }
       continue;
     }
+    if (/* adns's query strategy is not configurable */
+	OPTION_STARTS("timeout:") ||
+	OPTION_STARTS("attempts:") ||
+	OPTION_IS("rotate") ||
+	/* adns provides the application with knob for this */
+	OPTION_IS("no-check-names") ||
+	/* adns normally does IPv6 if the application wants it; control
+	 * this with the adns_af: option if you like */
+	OPTION_IS("inet6") ||
+	/* adns does not do edns0 and this is not a problem */
+	OPTION_IS("edns0"))
+      continue;
     adns__diag(ads,-1,0,"%s:%d: unknown option `%.*s'", fn,lno, l,word);
   }
 
@@ -372,6 +384,10 @@ static void ccf_lookup(adns_state ads, const char *fn, int lno,
     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);
@@ -384,6 +400,7 @@ static const struct configcommandinfo {
   { "clearnameservers",  ccf_clearnss    },
   { "include",           ccf_include     },
   { "lookup",            ccf_lookup      }, /* OpenBSD */
+  { "lwserver",          ccf_ignore      }, /* BIND9 lwresd */
   {  0                                   }
 };