8 files changed, 197 insertions, 0 deletions
diff --git a/src/arpa/inet/htonl.c b/src/arpa/inet/htonl.c
new file mode 100644
index 00000000..c17f2470
--- /dev/null
+++ b/src/arpa/inet/htonl.c
@@ -0,0 +1,16 @@
+#include <arpa/inet.h>
+
+uint32_t htonl(uint32_t hostlong)
+{
+	union {
+		uint32_t u;
+		unsigned char c[sizeof(uint32_t)];
+	} u;
+
+	u.c[0] = (hostlong >> 24) & 0xff;
+	u.c[1] = (hostlong >> 16) & 0xff;
+	u.c[2] = (hostlong >> 8) & 0xff;
+	u.c[3] = (hostlong) & 0xff;
+
+	return u.u;
+}
diff --git a/src/arpa/inet/htons.c b/src/arpa/inet/htons.c
new file mode 100644
index 00000000..b6be02ed
--- /dev/null
+++ b/src/arpa/inet/htons.c
@@ -0,0 +1,14 @@
+#include <arpa/inet.h>
+
+uint16_t htons(uint16_t hostshort)
+{
+	union {
+		uint16_t u;
+		unsigned char c[sizeof(uint16_t)];
+	} u;
+
+	u.c[0] = (hostshort >> 8) & 0xff;
+	u.c[1] = (hostshort) & 0xff;
+
+	return u.u;
+}
diff --git a/src/arpa/inet/inet_addr.c b/src/arpa/inet/inet_addr.c
new file mode 100644
index 00000000..6073df80
--- /dev/null
+++ b/src/arpa/inet/inet_addr.c
@@ -0,0 +1,54 @@
+#include <arpa/inet.h>
+#include <stdlib.h>
+
+in_addr_t inet_addr(const char *cp)
+{
+	unsigned long parts[4] = { 0 };
+	in_addr_t addr = (in_addr_t)(-1);
+	size_t part = 0;
+
+	while (*cp && part < sizeof(parts)) {
+		char *next = NULL;
+		parts[part] = strtoul(cp, &next, 0);
+		if (*next == '.') {
+			part++;
+			cp = next + 1;
+		} else {
+			cp = next;
+		}
+
+		/* check for error */
+	}
+
+	switch (part) {
+	case 0:
+		addr = htonl(parts[0]);
+		break;
+
+	case 1:
+		if (parts[0] > 0xff || parts[1] > 0xffffff) {
+			break;
+		}
+		addr = htonl((parts[0] << 24) | parts[1]);
+		break;
+
+	case 2:
+		if (parts[0] > 0xff || parts[1] > 0xff || parts[2] > 0xffff) {
+			break;
+		}
+		addr = htonl((parts[0] << 24) | (parts[1] << 16) | parts[2]);
+		break;
+
+	case 3:
+		if (parts[0] > 0xff || parts[1] > 0xff || parts[2] > 0xff || parts[3] > 0xff) {
+			break;
+		}
+		addr = htonl((parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8) | parts[3]);
+		break;
+
+	default:
+		break;
+	}
+
+	return addr;
+}
diff --git a/src/arpa/inet/inet_ntoa.c b/src/arpa/inet/inet_ntoa.c
new file mode 100644
index 00000000..c2ca7fc6
--- /dev/null
+++ b/src/arpa/inet/inet_ntoa.c
@@ -0,0 +1,14 @@
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <stdio.h>
+
+char *inet_ntoa(struct in_addr in)
+{
+	static char s[INET_ADDRSTRLEN] = "";
+	sprintf(s, "%hhu.%hhu.%hhu.%hhu",
+		(in.s_addr >> 24) & 0xff,
+		(in.s_addr >> 16) & 0xff,
+		(in.s_addr >> 8) & 0xff,
+		(in.s_addr) & 0xff);
+	return s;
+}
diff --git a/src/arpa/inet/inet_ntop.c b/src/arpa/inet/inet_ntop.c
new file mode 100644
index 00000000..0a89cedf
--- /dev/null
+++ b/src/arpa/inet/inet_ntop.c
@@ -0,0 +1,34 @@
+#include <arpa/inet.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+const char *inet_ntop(int af, const void *restrict src, char *restrict dst, socklen_t size)
+{
+	if (af == AF_INET) {
+		in_addr_t *a = src;
+		char s[INET_ADDRSTRLEN] = "";
+		if (snprintf(s, sizeof(s), "%hhu.%hhu.%hhu.%hhu",
+			(*src >> 24) & 0xff,
+			(*src >> 16) & 0xff,
+			(*src >> 8) & 0xff,
+			(*src) & 0xff) > size) {
+			errno = ENOSPC;
+			return NULL;
+		}
+		strcpy(dst, s);
+		return dst;
+	}
+
+	if (af != AF_INET6) {
+		errno = EAFNOSUPPORT;
+		return NULL;
+	}
+
+	/*
+	char s[INET6_ADDRSTRLEN] = "";
+	unsigned char *a = src;
+	*/
+	/* do IPv6 conversion */
+	return dst;
+}
diff --git a/src/arpa/inet/inet_pton.c b/src/arpa/inet/inet_pton.c
new file mode 100644
index 00000000..14e7219b
--- /dev/null
+++ b/src/arpa/inet/inet_pton.c
@@ -0,0 +1,43 @@
+#include <arpa/inet.h>
+#include <errno.h>
+#include <stdlib.h>
+
+int inet_pton(int af, const char *restrict src, void *restrict dst)
+{
+	if (af == AF_INET) {
+		in_addr_t *a = dst;
+		unsigned long parts[4] = { 0 };
+		size_t part = 0;
+
+		while (*src && part < sizeof(parts)) {
+			char *next = NULL;
+			parts[part] = strtoul(src, &next, 0);
+			if (parts[part] > 255) {
+				return 0;
+			}
+
+			if (*next == '.') {
+				part++;
+				src = next + 1;
+			} else {
+				src = next;
+			}
+
+		}
+
+		if (part != sizeof(parts) - 1) {
+			return 0;
+		}
+
+		*a =  htonl((parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8) | parts[3]);
+		return 1;
+	}
+
+	if (af != AF_INET6) {
+		errno = EAFNOSUPPORT;
+		return -1;
+	}
+
+	/* do ipv6 conversion */
+	return 1;
+}
diff --git a/src/arpa/inet/ntohl.c b/src/arpa/inet/ntohl.c
new file mode 100644
index 00000000..9f0b1557
--- /dev/null
+++ b/src/arpa/inet/ntohl.c
@@ -0,0 +1,11 @@
+#include <arpa/inet.h>
+
+uint32_t ntohl(uint32_t netlong)
+{
+	union {
+		uint32_t u;
+		unsigned char c[sizeof(uint32_t)];
+	} u = { netlong };
+
+	return (u.c[0] << 24) | (u.c[1] << 16) | (u.c[2] << 8) | u.c[3];
+}
diff --git a/src/arpa/inet/ntohs.c b/src/arpa/inet/ntohs.c
new file mode 100644
index 00000000..20d117d2
--- /dev/null
+++ b/src/arpa/inet/ntohs.c
@@ -0,0 +1,11 @@
+#include <arpa/inet.h>
+
+uint16_t ntohs(uint16_t netshort)
+{
+	union {
+		uint16_t u;
+		unsigned char c[sizeof(uint16_t)];
+	} u = { netshort };
+
+	return (u.c[0] << 8) | u.c[1];
+}