1 files changed, 50 insertions, 17 deletions

diff --git a/mdk-stage1/dietlibc/libcruft/gethostbyaddr_r.c b/mdk-stage1/dietlibc/libcruft/gethostbyaddr_r.c
index 37174ab13..d18053c45 100644
--- a/mdk-stage1/dietlibc/libcruft/gethostbyaddr_r.c
+++ b/mdk-stage1/dietlibc/libcruft/gethostbyaddr_r.c
@@ -5,15 +5,10 @@
 #include <netdb.h>
 #include <stdlib.h>
 #include <arpa/inet.h>
-#include <sys/poll.h>
 #include <unistd.h>
 #include <errno.h>
-
-#include <stdio.h>
-
-extern int __dns_gethostbyx_r(const char* name, struct hostent* result,
-			char *buf, size_t buflen,
-			struct hostent **RESULT, int *h_errnop, int lookfor);
+#include "dietfeatures.h"
+#include "dietdns.h"
 
 static int i2a(char* dest,unsigned int x) {
   register unsigned int tmp=x;
@@ -24,6 +19,10 @@ static int i2a(char* dest,unsigned int x) {
   return len+1;
 }
 
+static char hexdigit(char c) {
+  return c>9?c-10+'a':c+'0';
+}
+
 /* Oh boy, this interface sucks so badly, there are no words for it.
  * Not one, not two, but _three_ error signalling methods!  (*h_errnop
  * nonzero?  return value nonzero?  *RESULT zero?)  The glibc goons
@@ -31,21 +30,55 @@ static int i2a(char* dest,unsigned int x) {
 int gethostbyaddr_r(const char* addr, size_t length, int format,
 		    struct hostent* result, char *buf, size_t buflen,
 		    struct hostent **RESULT, int *h_errnop) {
+  char tmpbuf[100];
+  char* tmp;
+  int res;
+  (void)length;	/* shut gcc up about unused length.  The length is implicit with format */
+#ifdef WANT_ETC_HOSTS
+  {
+    struct hostent* r;
+    while ((r=gethostent_r(buf,buflen))) {
+      if (r->h_addrtype==format && !memcmp(r->h_addr_list[0],addr,r->h_length)) {	/* found it! */
+	memmove(result,r,sizeof(struct hostent));
+	*RESULT=result;
+	*h_errnop=0;
+	return 0;
+      }
+    }
+    endhostent();
+  }
+#endif
   if (format==AF_INET) {
-    char tmpbuf[50];
-    char *tmp;
-    int res;
     tmp=tmpbuf+i2a(tmpbuf,(unsigned char)addr[3]); *tmp++='.';
     tmp+=i2a(tmp,(unsigned char)addr[2]); *tmp++='.';
     tmp+=i2a(tmp,(unsigned char)addr[1]); *tmp++='.';
     tmp+=i2a(tmp,(unsigned char)addr[0]); strcpy(tmp,".in-addr.arpa");
-    res= __dns_gethostbyx_r(tmpbuf,result,buf+4,buflen-4,RESULT,h_errnop,12);	/* 12 == ns_t_ptr */
-    if (res==0) {
-      result->h_addr_list[0]=buf;
-      result->h_addr_list[1]=buf;
-      *(int*)buf=*(int*)addr;
+  } else if (format==AF_INET6) {
+    int i;
+    tmp=tmpbuf;
+    for (i=15; i>=0; --i) {
+      tmp[0]=hexdigit(addr[i]&0xf);
+      tmp[1]='.';
+      tmp[2]=hexdigit((addr[i]>>4)&0xf);
+      tmp[3]='.';
+      tmp+=4;
+    }
+    strcpy(tmp,".ip6.int");
+  } else return 1;
+  if (buflen<sizeof(struct hostent)+16) {
+    errno=ENOMEM;
+    *h_errnop=NO_RECOVERY;
+    return 1;
+  }
+  res= __dns_gethostbyx_r(tmpbuf,result,buf+16,buflen-16,RESULT,h_errnop,12);	/* 12 == ns_t_ptr */
+  if (res==0) {
+    if (format==AF_INET) {
+      result->h_length=4;
+      result->h_addrtype=format;
     }
-    return res;
+    memcpy(buf,addr,result->h_length);
+    result->h_addr_list[0]=buf;
+    result->h_addr_list[1]=0;
   }
-  return 1;
+  return res;
 }