fixed bug #34592: lwip_gethostbyname_r uses nonstandard error value, removed those unused (nonstandard?) error values from arch.h

CHANGELOG

@@ -69,6 +69,10 @@ HISTORY
 
  ++ Bugfixes:
 
+  2011-10-18: Simon Goldschmidt
+  * arch.h, netdb.c: fixed bug #34592: lwip_gethostbyname_r uses nonstandard
+    error value
+
   2011-10-18: Simon Goldschmidt
   * opt.h: fixed default values of TCP_SNDLOWAT and TCP_SNDQUEUELOWAT for small
     windows (bug #34176 select after non-blocking send times out)

src/api/netdb.c

@@ -200,7 +200,7 @@ lwip_gethostbyname_r(const char *name, struct hostent *ret, char *buf,
   err = netconn_gethostbyname(name, &(h->addr));
   if (err != ERR_OK) {
     LWIP_DEBUGF(DNS_DEBUG, ("lwip_gethostbyname(%s) failed, err=%d\n", name, err));
-    *h_errnop = ENSRNOTFOUND;
+    *h_errnop = HOST_NOT_FOUND;
     return -1;
   }
 

src/include/lwip/arch.h

@@ -204,27 +204,6 @@ extern "C" {
 #define  ENOMEDIUM      123  /* No medium found */
 #define  EMEDIUMTYPE    124  /* Wrong medium type */
 
-
-#define ENSROK                    0 /* DNS server returned answer with no data */
-#define ENSRNODATA              160 /* DNS server returned answer with no data */
-#define ENSRFORMERR             161 /* DNS server claims query was misformatted */
-#define ENSRSERVFAIL            162 /* DNS server returned general failure */
-#define ENSRNOTFOUND            163 /* Domain name not found */
-#define ENSRNOTIMP              164 /* DNS server does not implement requested operation */
-#define ENSRREFUSED             165 /* DNS server refused query */
-#define ENSRBADQUERY            166 /* Misformatted DNS query */
-#define ENSRBADNAME             167 /* Misformatted domain name */
-#define ENSRBADFAMILY           168 /* Unsupported address family */
-#define ENSRBADRESP             169 /* Misformatted DNS reply */
-#define ENSRCONNREFUSED         170 /* Could not contact DNS servers */
-#define ENSRTIMEOUT             171 /* Timeout while contacting DNS servers */
-#define ENSROF                  172 /* End of file */
-#define ENSRFILE                173 /* Error reading file */
-#define ENSRNOMEM               174 /* Out of memory */
-#define ENSRDESTRUCTION         175 /* Application terminated lookup */
-#define ENSRQUERYDOMAINTOOLONG  176 /* Domain name is too long */
-#define ENSRCNAMELOOP           177 /* Domain name is too long */
-
 #ifndef errno
 extern int errno;
 #endif