1 files changed, 95 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libcruft/res_query.c b/mdk-stage1/dietlibc/libcruft/res_query.c
new file mode 100644
index 000000000..28b5c3ac8
--- /dev/null
+++ b/mdk-stage1/dietlibc/libcruft/res_query.c
@@ -0,0 +1,95 @@
+#include <resolv.h>
+#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 <arpa/nameser.h>
+#include "dietfeatures.h"
+
+extern void __dns_make_fd(void);
+extern int __dns_fd;
+#ifdef WANT_IPV6_DNS
+extern void __dns_make_fd6(void);
+extern int __dns_fd6;
+#endif
+
+extern void __dns_readstartfiles(void);
+
+int res_query(const char *dname, int class, int type, unsigned char *answer, int anslen) {
+  unsigned char packet[512];
+  int size;
+#ifndef WANT_IPV6_DNS
+  __dns_make_fd();
+#endif
+
+  __dns_readstartfiles();
+  if ((size=res_mkquery(QUERY,dname,class,type,0,0,0,packet,512))<0) { h_errno=NO_RECOVERY; return -1; }
+  {
+    {
+      int i;	/* current server */
+      int j;	/* timeout count down */
+      struct pollfd duh;
+      struct timeval last,now;
+#ifdef WANT_IPV6_DNS
+      int tmpfd;	/* the warning gcc issues here is bogus */
+#else
+      duh.fd=__dns_fd;
+#endif
+      i=0;
+      duh.events=POLLIN;
+      last.tv_sec=0;
+      for (j=120; j>0; --j) {
+	gettimeofday(&now,0);
+	if (now.tv_sec-last.tv_sec>10) {
+#ifdef WANT_IPV6_DNS
+	  struct sockaddr* s=(struct sockaddr*)&(_res.nsaddr_list[i]);
+	  if (s->sa_family==AF_INET6) {
+	    __dns_make_fd6();
+	    tmpfd=__dns_fd6;
+	  } else {
+	    __dns_make_fd();
+	    tmpfd=__dns_fd;
+	  }
+	  duh.fd=tmpfd;
+	  if (sendto(tmpfd,packet,size,0,s,sizeof(struct sockaddr_in6))==0)
+	    gettimeofday(&last,0);
+#else
+	  if (sendto(__dns_fd,packet,size,0,(struct sockaddr*)&(_res.nsaddr_list[i]),sizeof(struct sockaddr))==0)
+	    gettimeofday(&last,0);
+#endif
+	  last=now;
+	}
+	if (++i >= _res.nscount) i=0;
+	if (poll(&duh,1,1000) == 1) {
+	  /* read and parse answer */
+	  unsigned char inpkg[1500];
+#ifdef WANT_IPV6_DNS
+	  int len=read(tmpfd,inpkg,1500);
+#else
+	  int len=read(__dns_fd,inpkg,1500);
+#endif
+	  /* header, question, answer, authority, additional */
+	  if (inpkg[0]!=packet[0] || inpkg[1]!=packet[1]) continue;	/* wrong ID */
+	  if ((inpkg[2]&0xf9) != (_res.options&RES_RECURSE?0x81:0x80)) continue;	/* not answer */
+	  if ((inpkg[3]&0x0f) != 0) { h_errno=HOST_NOT_FOUND; return -1; }		/* error */
+	  if (len>anslen) {
+	    h_errno=NO_RECOVERY;
+	    return -1;
+	  }
+	  memmove(answer,inpkg,len);
+	  return len;
+	}
+/*kaputt:*/
+      }
+    }
+  }
+  h_errno=NO_DATA;
+  return -1;
+}
+