Added browser IP address support

4 files changed, 63 insertions, 1 deletions

diff --git a/libnet/Makefile b/libnet/Makefile
index 95baa33..43de0e2 100644
--- a/libnet/Makefile
+++ b/libnet/Makefile
@@ -1,6 +1,6 @@
 # MIT License, Copyright (c) 2020 Marvin Borner
 
-COBJS = dns.o http.o
+COBJS = dns.o http.o ip.o
 CC = ccache ../cross/opt/bin/i686-elf-gcc
 LD = ccache ../cross/opt/bin/i686-elf-ld
 AR = ccache ../cross/opt/bin/i686-elf-ar
diff --git a/libnet/inc/ip.h b/libnet/inc/ip.h
new file mode 100644
index 0000000..e06aba2
--- /dev/null
+++ b/libnet/inc/ip.h
@@ -0,0 +1,12 @@
+// MIT License, Copyright (c) 2020 Marvin Borner
+// Most net/ip handlers are in the kernel space
+// This is a userspace wrapper for some things
+
+#ifndef IP_H
+#define IP_H
+
+#include <def.h>
+
+int ip_pton(const char *src, u32 *dst);
+
+#endif
diff --git a/libnet/inc/net.h b/libnet/inc/net.h
index ac9296e..eb80cf9 100644
--- a/libnet/inc/net.h
+++ b/libnet/inc/net.h
@@ -4,6 +4,7 @@
 #define NET_H
 
 #include <http.h>
+#include <ip.h>
 #include <socket.h>
 #include <sys.h>
 
diff --git a/libnet/ip.c b/libnet/ip.c
new file mode 100644
index 0000000..eb2e202
--- /dev/null
+++ b/libnet/ip.c
@@ -0,0 +1,49 @@
+// MIT License, Copyright (c) 2020 Marvin Borner
+// Most net/ip handlers are in the kernel space
+// This is a userspace wrapper for some things
+
+#include <def.h>
+#include <mem.h>
+#include <net.h>
+#include <str.h>
+
+// Inspired by Paul Vixie, 1996
+int ip_pton(const char *src, u32 *dst)
+{
+	const char *end = src + strlen(src);
+	u8 tmp[4], *tp;
+	int ch = 0;
+	int saw_digit = 0;
+	int octets = 0;
+	*(tp = tmp) = 0;
+
+	while (src < end) {
+		ch = *src++;
+		if (ch >= '0' && ch <= '9') {
+			u32 new = *tp * 10 + (ch - '0');
+
+			if ((saw_digit && *tp == 0) || new > 255)
+				return 0;
+
+			*tp = new;
+			if (!saw_digit) {
+				if (++octets > 4)
+					return 0;
+				saw_digit = 1;
+			}
+		} else if (ch == '.' && saw_digit) {
+			if (octets == 4)
+				return 0;
+			*++tp = 0;
+			saw_digit = 0;
+		} else {
+			return 0;
+		}
+	}
+
+	if (octets < 4)
+		return 0;
+
+	*dst = htonl(*(u32 *)tmp);
+	return 1;
+}