1 files changed, 19 insertions, 0 deletions
diff --git a/ip4_scan.c b/ip4_scan.c
new file mode 100644
index 0000000..e9538ec
--- /dev/null
+++ b/ip4_scan.c
@@ -0,0 +1,19 @@
+#include "scan.h"
+#include "ip4.h"
+
+unsigned int ip4_scan(const char *s,char ip[4])
+{
+  unsigned int i;
+  unsigned int len;
+  unsigned long u;
+ 
+  len = 0;
+  i = scan_ulong(s,&u); if (!i) return 0; ip[0] = u; s += i; len += i;
+  if (*s != '.') return 0; ++s; ++len;
+  i = scan_ulong(s,&u); if (!i) return 0; ip[1] = u; s += i; len += i;
+  if (*s != '.') return 0; ++s; ++len;
+  i = scan_ulong(s,&u); if (!i) return 0; ip[2] = u; s += i; len += i;
+  if (*s != '.') return 0; ++s; ++len;
+  i = scan_ulong(s,&u); if (!i) return 0; ip[3] = u; s += i; len += i;
+  return len;
+}