remove cruft from old resolver and numeric ip parsing

the old resolver code used a function __ipparse which contained the
logic for inet_addr and inet_aton, which is needed in getaddrinfo.
this was phased out in the resolver overhaul in favor of directly
using inet_aton and inet_pton as appropriate.

this commit cleans up some stuff that was left behind.

1 files changed, 41 insertions, 0 deletions

diff --git a/src/network/inet_aton.c b/src/network/inet_aton.c
new file mode 100644
index 00000000..0f9a45f6
--- /dev/null
+++ b/src/network/inet_aton.c
@@ -0,0 +1,41 @@
+#include <ctype.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include "libc.h"
+
+int __inet_aton(const char *s0, struct in_addr *dest)
+{
+	const char *s = s0;
+	unsigned char *d = (void *)dest;
+	unsigned long a[4] = { 0 };
+	char *z;
+	int i;
+
+	for (i=0; i<4; i++) {
+		a[i] = strtoul(s, &z, 0);
+		if (z==s || (*z && *z != '.') || !isdigit(*s))
+			return 0;
+		if (!*z) break;
+		s=z+1;
+	}
+	if (i==4) return 0;
+	switch (i) {
+	case 0:
+		a[1] = a[0] & 0xffffff;
+		a[0] >>= 24;
+	case 1:
+		a[2] = a[1] & 0xffff;
+		a[1] >>= 16;
+	case 2:
+		a[3] = a[2] & 0xff;
+		a[2] >>= 8;
+	}
+	for (i=0; i<4; i++) {
+		if (a[i] > 255) return 0;
+		d[i] = a[i];
+	}
+	return 1;
+}
+
+weak_alias(__inet_aton, inet_aton);