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authorNicolas Schodet2008-03-31 18:42:22 +0200
committerNicolas Schodet2008-03-31 18:42:22 +0200
commite332353ccadd10fda96d2c02dddc64de0dbdea49 (patch)
tree7feab3971e050623eb6cdcefbebed5d6dead1606 /digital/avr/modules/host/mex.host.c
parent0bb7eac6a0c02c1c357e5ec3a891ec89cb8d4797 (diff)
* digital/avr/modules/host:
- added client socket code. - added mex Node declarations.
Diffstat (limited to 'digital/avr/modules/host/mex.host.c')
-rw-r--r--digital/avr/modules/host/mex.host.c93
1 files changed, 93 insertions, 0 deletions
diff --git a/digital/avr/modules/host/mex.host.c b/digital/avr/modules/host/mex.host.c
new file mode 100644
index 00000000..7e9f4362
--- /dev/null
+++ b/digital/avr/modules/host/mex.host.c
@@ -0,0 +1,93 @@
+/* mex.host.c - mex library support. */
+/* avr.host - Host fonctions modules. {{{
+ *
+ * Copyright (C) 2008 Nicolas Schodet
+ *
+ * APBTeam:
+ * Web: http://apbteam.org/
+ * Email: team AT apbteam DOT org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * }}} */
+#include "common.h"
+#include "mex.h"
+#include "socket.h"
+
+/** Message structure.
+ *
+ * Message buffer is allocated at message creation. Space is reserved at
+ * buffer start to allow encapsulation.
+ *
+ * A message can only be sent if header_tail == payload_head. */
+struct mex_msg_t
+{
+ /** Message type. */
+ u8 mtype;
+ /** Allocated buffer. */
+ u8 *buffer_head, *buffer_tail;
+ /** Header portion of the message. */
+ u8 *header_head, *header_tail;
+ /** Payload portion of the message. */
+ u8 *payload_head, *payload_tail;
+};
+
+/** Global context structure. */
+struct mex_node_t
+{
+ /** Connection with the Hub. */
+ int socket;
+ /** Current date. */
+ u32 date;
+ /** Current sequence number, used for Hub synchronisation. */
+ u8 seq;
+ /** Currently handled request, or -1 if none. */
+ int req;
+ /** Table of registered handlers. */
+ mex_handler_t *handlers[256];
+};
+
+/** Create a new message from a buffer. Buffer will be free'd on message
+ * deletion. */
+static mex_msg_t *
+mex_msg_new_buffer (u8 *buffer, int size);
+
+/** Encapsulate a message and fill header. */
+static void
+mex_msg_encapsulate (mex_msg_t *msg, const char *fmt, ...);
+
+/** Decapsulate a message, the current payload becomes the full message. */
+static void
+mex_msg_decapsulate (mex_msg_t *msg);
+
+/** Receive one message. */
+static mex_msg_t *
+mex_node_recv (void);
+
+/** Call the right handler for the given message. */
+static void
+mex_node_dispatch (mex_msg_t *msg);
+
+/** Handle an incoming DATE. */
+static void
+mex_node_handle_DATE (mex_msg_t *msg);
+
+/** Handle an incoming REQ. */
+static void
+mex_node_handle_REQ (mex_msg_t *msg);
+
+/** Global context. */
+static struct mex_node_t mex_node_global;
+