From 62bc1af6c6a1201db551e1ec523e757415464fd5 Mon Sep 17 00:00:00 2001
From: root <root@nolonger-other.tetra.james.local>
Date: Sun, 25 Oct 2020 13:26:29 +0000
Subject: tidy up, make less awful

---
 sia.h | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 sia.h

(limited to 'sia.h')

diff --git a/sia.h b/sia.h
new file mode 100644
index 0000000..71a8c9d
--- /dev/null
+++ b/sia.h
@@ -0,0 +1,66 @@
+#ifndef _sia_h_
+#define _sia_h_
+
+#define SIA_TIMEOUT 3   // standard says 2.5s
+
+#define SIA_FN_ACCOUNT_ID          0x23
+#define SIA_FN_ORIGIN_ID           0x26
+#define SIA_FN_END_OF_DATA         0x30
+#define SIA_FN_WAIT                0x31
+#define SIA_FN_ABORT               0x32
+#define SIA_FN_RES_3               0x33
+#define SIA_FN_RES_4               0x34
+#define SIA_FN_RES_5               0x35
+#define SIA_FN_ACK_AND_STANDBY     0x36
+#define SIA_FN_ACK_AND_DISCONNECT  0x37
+#define SIA_FN_ACKNOLEDGE          0x38
+#define SIA_FN_ALT_ACKNOLEDGE      0x08 //JMM I can't imagine how someone made that mistake :)
+#define SIA_FN_REJECT              0x39
+#define SIA_FN_ALT_REJECT          0x09
+#define SIA_FN_REMOTE_LOGIN        0x3f
+#define SIA_FN_CONFIGURATION       0x40
+#define SIA_FN_ASCII               0x41
+#define SIA_FN_CONTROL             0x43
+#define SIA_FN_ENVIRONMENTAL       0x45
+#define SIA_FN_VIDEO               0x49
+#define SIA_FN_LISTEN_IN           0x4c
+#define SIA_FN_NEW_EVENT           0x4e
+#define SIA_FN_OLD_EVENT           0x4f
+#define SIA_FN_PROGRAM             0x50
+#define SIA_FN_VCHN_REQUEST        0x56
+#define SIA_FN_EXTENDED            0x58
+#define SIA_FN_VCHN_FRAME          0x76
+
+
+#define SIA_MAX_DATA_LENGTH 0x3f
+#define SIA_MAX_BLOCK_LENGTH  (2 + SIA_MAX_DATA_LENGTH + 1)
+
+typedef union {
+  unsigned char block[SIA_MAX_BLOCK_LENGTH];
+  struct {
+    unsigned char length : 6;
+    unsigned char request_ack: 1;
+    unsigned char reverse_channel: 1;
+    unsigned char function;
+    unsigned char data[];
+  };
+} SIA_Block;
+
+
+/* sia.c */
+extern int sia_fn_valid (SIA_Block *s);
+extern int sia_fn_permits_ack (unsigned char fn);
+extern unsigned int sia_data_length (SIA_Block *s);
+extern unsigned int sia_length (SIA_Block *s);
+extern int sia_parity_valid (SIA_Block *s);
+extern void sia_set_parity (SIA_Block *s);
+extern ssize_t sia_write (int fd, SIA_Block *s);
+extern ssize_t sia_acknoledge (int fd);
+extern int sia_ack_if_needed (int fd, SIA_Block *s);
+extern int sia_parse (unsigned char *buf, unsigned len, SIA_Block *b);
+extern int sia_rx_with_timeout (int fd, SIA_Block *b, int timeout);
+extern int sia_rx_with_timeout_ignore_log (int fd, SIA_Block *b, int timeout);
+extern int sia_login (int fd, SIA_Block *b);
+
+
+#endif  /* _sia_h_ */
-- 
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