filter: properly filter ipv4 address form urls

properly match them against db data.

1 files changed, 18 insertions, 0 deletions

diff --git a/blob.c b/blob.c
index 81722d2..f6daef1 100644
--- a/blob.c
+++ b/blob.c
@@ -52,6 +52,24 @@ int blob_cmp(blob_t a, blob_t b)
 	return memcmp(a.ptr, b.ptr, a.len);
 }
 
+unsigned long blob_inet_addr(blob_t b)
+{
+	unsigned long ip = 0;
+	int i;
+
+	for (i = 0; i < 3; i++) {
+		ip += blob_pull_uint(&b, 10);
+		ip <<= 8;
+		if (!blob_pull_matching(&b, BLOB_STR(".")))
+			return 0;
+	}
+	ip += blob_pull_uint(&b, 10);
+	if (b.len != 0)
+		return 0;
+	return ip;
+}
+
+
 blob_t blob_pushed(blob_t buffer, blob_t left)
 {
 	if (buffer.ptr + buffer.len != left.ptr + left.len)