swift: Add skeleton implementation of swift API based on raw sockets.

diff --git a/src/swift_raw.c b/src/swift_raw.c
new file mode 100644 (file)
index 0000000..e88a973
--- /dev/null
+++ b/src/swift_raw.c
@@ -0,0 +1,171 @@
+/*
+ * swift implementation of syscall API>
+ *
+ * Simulates the classic socket syscalls (socket, bind, send, recv).
+ * Implementation uses raw sockets (AF_INET, SOCK_RAW).
+ *
+ * Subsequently, implementation is to be ported into kernel space and
+ * the interface is going to be offered by the Linux syscall API.
+ *
+ * Heavily inspired by GLIBC's <sys/socket.h>
+ * (/usr/include/sys/socket.h).
+ *
+ * 2011, Razvan Deaconescu, razvan.deaconescu@cs.pub.ro
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+#include "swift_raw.h"
+
+/*
+ * Create a new socket of type TYPE in domain DOMAIN, using
+ * protocol PROTOCOL.  If PROTOCOL is zero, one is chosen automatically.
+ * Returns a file descriptor for the new socket, or -1 for errors.
+ *
+ * swift: protocol is IPPROTO_SWIFT.
+ */
+int sw_socket (int __domain, int __type, int __protocol)
+{
+       int s;
+
+       /* TODO */
+
+       return s;
+}
+
+/*
+ * Give the socket FD the local address ADDR (which is LEN bytes long).
+ *
+ * swift: ADDR is of type struct sockaddr_sw.
+ */
+int sw_bind (int __fd, __CONST_SOCKADDR_ARG __addr, socklen_t __len)
+{
+       /* TODO */
+
+       return 0;
+}
+
+/* Put the local address of FD into *ADDR and its length in *LEN.  */
+int sw_getsockname (int __fd, __SOCKADDR_ARG __addr,
+                       socklen_t *__restrict __len)
+{
+       /* TODO */
+
+       return 0;
+}
+
+/*
+ * Send N bytes of BUF on socket FD to peer at address ADDR (which is
+ * ADDR_LEN bytes long).  Returns the number sent, or -1 for errors.
+ *
+ * This function is a cancellation point and therefore not marked with
+ * __THROW.
+ */
+ssize_t sw_sendto (int __fd, __const void *__buf, size_t __n,
+                      int __flags, __CONST_SOCKADDR_ARG __addr,
+                      socklen_t __addr_len)
+{
+       ssize_t bytes_sent;
+
+       /* TODO */
+
+       return bytes_sent;
+}
+
+/*
+ * Read N bytes into BUF through socket FD.
+ * If ADDR is not NULL, fill in *ADDR_LEN bytes of it with tha address of
+ * the sender, and store the actual size of the address in *ADDR_LEN.
+ * Returns the number of bytes read or -1 for errors.
+ *
+ * This function is a cancellation point and therefore not marked with
+ * __THROW.
+ */
+ssize_t sw_recvfrom (int __fd, void *__restrict __buf, size_t __n,
+                        int __flags, __SOCKADDR_ARG __addr,
+                        socklen_t *__restrict __addr_len)
+{
+       ssize_t bytes_recv;
+
+       /* TODO */
+
+       return bytes_recv;
+}
+
+/*
+ * Send a message described MESSAGE on socket FD.
+ * Returns the number of bytes sent, or -1 for errors.
+ *
+ * This function is a cancellation point and therefore not marked with
+ * __THROW.
+ */
+ssize_t sw_sendmsg (int __fd, __const struct msghdr *__message,
+                       int __flags)
+{
+       ssize_t bytes_sent;
+
+       /* TODO */
+
+       return bytes_sent;
+}
+
+/*
+ * Receive a message as described by MESSAGE from socket FD.
+ * Returns the number of bytes read or -1 for errors.
+ *
+ * This function is a cancellation point and therefore not marked with
+ * __THROW.
+ */
+ssize_t sw_recvmsg (int __fd, struct msghdr *__message, int __flags)
+{
+       ssize_t bytes_recv;
+
+       /* TODO */
+
+       return bytes_recv;
+}
+
+/*
+ * Put the current value for socket FD's option OPTNAME at protocol level
+ * LEVEL into OPTVAL (which is *OPTLEN bytes long), and set *OPTLEN to the
+ * value's actual length.  Returns 0 on success, -1 for errors.
+ */
+int sw_getsockopt (int __fd, int __level, int __optname,
+                      void *__restrict __optval,
+                      socklen_t *__restrict __optlen)
+{
+       /* Call classical interface of getsockopt(2). */
+       return getsockopt(__fd, __level, __optname, __optval, __optlen);
+}
+
+/*
+ * Set socket FD's option OPTNAME at protocol level LEVEL
+ * to *OPTVAL (which is OPTLEN bytes long).
+ * Returns 0 on success, -1 for errors.
+ */
+
+int sw_setsockopt (int __fd, int __level, int __optname,
+                      __const void *__optval, socklen_t __optlen)
+{
+       /* Call classical interface of setsockopt(2). */
+       return setsockopt(__fd, __level, __optname, __optval, __optlen);
+}
+
+/*
+ * Shut down all or part of the connection open on socket FD.
+ * HOW determines what to shut down:
+ *   SHUT_RD   = No more receptions;
+ *   SHUT_WR   = No more transmissions;
+ *   SHUT_RDWR = No more receptions or transmissions.
+ * Returns 0 on success, -1 for errors.
+ */
+int sw_shutdown (int __fd, int __how)
+{
+       /* Call classical interface of shutdown(2). */
+       return shutdown(__fd, __how);
+}