1 files changed, 51 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libcruft/gethostbyaddr_r.c b/mdk-stage1/dietlibc/libcruft/gethostbyaddr_r.c
new file mode 100644
index 000000000..37174ab13
--- /dev/null
+++ b/mdk-stage1/dietlibc/libcruft/gethostbyaddr_r.c
@@ -0,0 +1,51 @@
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#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);
+
+static int i2a(char* dest,unsigned int x) {
+  register unsigned int tmp=x;
+  register int len=0;
+  if (x>=100) { *dest++=tmp/100+'0'; tmp=tmp%100; ++len; }
+  if (x>=10) { *dest++=tmp/10+'0'; tmp=tmp%10; ++len; }
+  *dest++=tmp+'0';
+  return len+1;
+}
+
+/* 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
+ * really outdid themselves with this one. */
+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) {
+  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;
+    }
+    return res;
+  }
+  return 1;
+}