From 4405b4fa990821a88cbded9fdf85d226ef3b3f66 Mon Sep 17 00:00:00 2001
From: John Hodge <tpg@mutabah.net>
Date: Mon, 8 Aug 2011 21:16:55 +0800
Subject: [PATCH] Usermode/libc - Implementing POSIX/BSD sockets

---
 Usermode/Libraries/libc.so_src/sockets.c | 70 ++++++++++++++++++++++
 Usermode/include/sys/socket.h            | 75 ++++++++++++++++++++++++
 2 files changed, 145 insertions(+)
 create mode 100644 Usermode/Libraries/libc.so_src/sockets.c
 create mode 100644 Usermode/include/sys/socket.h

diff --git a/Usermode/Libraries/libc.so_src/sockets.c b/Usermode/Libraries/libc.so_src/sockets.c
new file mode 100644
index 00000000..854d6d97
--- /dev/null
+++ b/Usermode/Libraries/libc.so_src/sockets.c
@@ -0,0 +1,70 @@
+/*
+ * Acess2 C Library
+ * - By John Hodge (thePowersGang)
+ *
+ * sockets.c
+ * - POSIX Sockets translation/emulation
+ */
+#include <acess/sys.h>
+#include <sys/socket.h>
+
+#define MAX_SOCKS	64
+
+struct {
+	 int	AddrType;
+	const char	*ListenFile;
+	const char	*ConnectFile;
+	char	RemoteAddr[16];	// If != 0, bind to a remote addr
+} gaSockInfo[MAX_SOCKS]
+
+// === CODE ===
+int socket(int domain, int type, int protocol)
+{
+	 int	fd, addrType=0;
+	const char	*listenFile, *connectFile;
+
+	// Validation
+	switch(domain)
+	{
+	case PF_INET:
+		addrType = AF_INET;
+	case PF_INET6:
+		if(addrType == 0)	addrType = AF_INET6;
+		switch(type)
+		{
+		case SOCK_STREAM:
+			listenFile = "tcps";
+			connectFile = "tcpc";
+			break;
+		case SOCK_DGRAM:
+			listenFile = "udp";
+			connectFile = "udp";
+			break;
+		default:
+			errno = EINVAL;
+			return -1;
+		}
+		break;
+	default:
+		errno = EINVAL;
+		return -1;
+	}
+
+	fd = open("/Devices/null", 0);
+	if(fd == -1) {
+		return -1;
+	}
+
+	if( fd >= MAX_SOCKS ) {
+		close(fd);
+		errno = ENFILE;
+		return -1;
+	}
+
+	gaSockInfo[fd].AddrType = 0;
+	gaSockInfo[fd].ListenFile = listenFile;
+	gaSockInfo[fd].ConnectFile = connectFile;
+	memset( gaSockInfo[fd].RemoteAddr, 0, sizeof(gaSockInfo[fd].RemoteAddr) );
+
+	return fd;
+}
diff --git a/Usermode/include/sys/socket.h b/Usermode/include/sys/socket.h
new file mode 100644
index 00000000..43cb3d66
--- /dev/null
+++ b/Usermode/include/sys/socket.h
@@ -0,0 +1,75 @@
+/*
+ * Acess2 C Library
+ *
+ * sys/sockets.h
+ * - POSIX Sockets
+ *
+ * By John Hodge (thePowersGang)
+ */
+#ifndef _SYS_SOCKETS_H_
+#define _SYS_SOCKETS_H_
+
+typedef int	socklen_t;
+
+typedef enum
+{
+	AF_UNSPEC	= 0,
+	AF_INET 	= 4,
+	AF_INET6	= 6
+} sa_family_t;
+
+struct sockaddr
+{
+	sa_family_t	sa_family;
+	char       	sa_data[16];
+};
+
+/**
+ * \brief Values for \a domain of socket()
+ */
+enum eSocketDomains
+{
+	PF_LOCAL,	//!< Machine-local comms
+	PF_INET,	//!< IPv4
+	PF_INET6,	//!< IPv6
+	PF_PACKET	//!< Low level packet interface
+};
+#define PF_UNIX	PF_LOCAL
+
+enum eSocketTypes
+{
+	SOCK_STREAM,	//!< Stream (TCP)
+	SOCK_DGRAM,	//!< Datagram (UDP)
+	SOCK_SEQPACKET,	//!< 
+	SOCK_RAW,	//!< Raw packet access
+	SOCK_RDM	//!< Reliable non-ordered datagrams
+};
+
+/**
+ * \brief Create a new socket descriptor
+ * \param domain	Address family
+ */
+extern int	socket(int domain, int type, int protocol);
+
+/**
+ * \brief Bind a socket to an address
+ */
+extern int	bind(int sockfd, const struct sockaddr *addr, socklen_t addrlen);
+
+/**
+ * \brief Connect to another socket
+ */
+extern int	connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen);
+
+/**
+ * \brief Listen for incoming connections
+ */
+extern int	listen(int sockfd, int backlog);
+
+/**
+ * \brief Accept an incoming connection
+ */
+extern int	accept(int sockfd, struct sockaddr *clientaddr, socklen_t addrlen);
+
+#endif
+
-- 
2.20.1