1 files changed, 40 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/lib/if_nameindex.c b/mdk-stage1/dietlibc/lib/if_nameindex.c
new file mode 100644
index 000000000..fc0e1c0ff
--- /dev/null
+++ b/mdk-stage1/dietlibc/lib/if_nameindex.c
@@ -0,0 +1,40 @@
+#include <net/if.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+#include <stdio.h>
+
+struct if_nameindex* if_nameindex(void) {
+  struct ifconf ic;
+  int fd,len,i;
+  struct if_nameindex* x,* y;
+  char *dest;
+  fd=socket(AF_INET6,SOCK_DGRAM,0);
+  if (fd<0) fd=socket(AF_INET,SOCK_DGRAM,0);
+  ic.ifc_buf=0;
+  ic.ifc_len=0;
+  if (ioctl(fd,SIOCGIFCONF,&ic)<0) {
+b0rken:
+    close(fd);
+    return 0;
+  }
+  ic.ifc_buf=alloca((size_t)ic.ifc_len);
+  if (ioctl(fd,SIOCGIFCONF,&ic)<0) goto b0rken;
+  len=(ic.ifc_len/sizeof(struct ifreq));
+  x=(struct if_nameindex*)malloc((len+1)*sizeof(struct if_nameindex)+len*IFNAMSIZ);
+  if (!x) goto b0rken;
+  dest=(char*)(x+len+1);
+  y=x;
+  for (i=0; i<len; ++i) {
+    struct ifreq* ir=(struct ifreq*)&ic.ifc_req[i];
+    y->if_name=dest;
+    memcpy(dest,ir->ifr_name,IFNAMSIZ);
+    if (ioctl(fd,SIOCGIFINDEX,ir)==-1) continue;
+    y->if_index=ir->ifr_ifindex;
+    dest+=IFNAMSIZ;
+    ++y;
+  }
+  y->if_name=0; y->if_index=0;
+  return x;
+}