1 files changed, 75 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libcruft/inet_ntop.c b/mdk-stage1/dietlibc/libcruft/inet_ntop.c
new file mode 100644
index 000000000..77c47f239
--- /dev/null
+++ b/mdk-stage1/dietlibc/libcruft/inet_ntop.c
@@ -0,0 +1,75 @@
+#include <arpa/inet.h>
+
+extern char *inet_ntoa_r(struct in_addr in,char* buf);
+
+static const unsigned char V4mappedprefix[12]={0,0,0,0,0,0,0,0,0,0,0xff,0xff};
+
+static char tohex(char hexdigit) {
+  return hexdigit>9?hexdigit+'a'-10:hexdigit+'0';
+}
+
+static int fmt_xlong(char* s,unsigned int i) {
+  char* bak=s;
+  *s=tohex((i>>12)&0xf); if (s!=bak || *s!='0') ++s;
+  *s=tohex((i>>8)&0xf); if (s!=bak || *s!='0') ++s;
+  *s=tohex((i>>4)&0xf); if (s!=bak || *s!='0') ++s;
+  *s=tohex(i&0xf);
+  return s-bak+1;
+}
+
+unsigned int fmt_ip6(char *s,const char ip[16])
+{
+  unsigned int len;
+  unsigned int i;
+  unsigned int temp;
+  unsigned int compressing;
+  int j;
+
+  len = 0; compressing = 0;
+  for (j=0; j<16; j+=2) {
+    if (j==12 && !memcmp(ip,V4mappedprefix,12)) {
+      inet_ntoa_r(*(struct in_addr*)(ip+12),s);
+      temp=strlen(s);
+      return len+temp;
+    }
+    temp = ((unsigned long) (unsigned char) ip[j] << 8) +
+            (unsigned long) (unsigned char) ip[j+1];
+    if (temp == 0) {
+      if (!compressing) {
+	compressing=1;
+	if (j==0) {
+	  *s++=':'; ++len;
+	}
+      }
+    } else {
+      if (compressing) {
+	compressing=0;
+	*s++=':'; ++len;
+      }
+      i = fmt_xlong(s,temp); len += i; s += i;
+      if (j<14) {
+	*s++ = ':';
+	++len;
+      }
+    }
+  }
+  *s=0;
+  return len;
+}
+
+const char* inet_ntop(int AF, const void *CP, char *BUF, size_t LEN) {
+  char buf[100];
+  int len;
+  if (AF==AF_INET) {
+    inet_ntoa_r(*(struct in_addr*)CP,buf);
+    len=strlen(buf);
+  } else if (AF==AF_INET6) {
+    len=fmt_ip6(buf,CP);
+  } else
+    return 0;
+  if (len<LEN) {
+    strcpy(BUF,buf);
+    return BUF;
+  }
+  return 0;
+}