nvtsrv: Add test server

2019-08-30 04:21:54 +02:00
parent d0bf492b10
commit 4e14ef1956
8 changed files with 957 additions and 0 deletions
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2018 Lars Thrane A/S
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * Telnet interface - server
+ */
+#ifndef TELNET_SERVER_H
+#define TELNET_SERVER_H
+
+typedef void    (cli_tx_f) (void *cctx, const void *buf, int len);
+typedef void    (cli_ss_f) (void *cctx, int signal, int value);
+
+/* Telnet context */
+typedef struct {
+    void           *cctx;       /* Client context */
+
+    cli_tx_f       *cli_tx;     /* Write to client */
+    cli_ss_f       *cli_ss;     /* Signal from client */
+
+    unsigned int    bytes_rx;   /* Rx byte count */
+    unsigned int    off_rx;     /* Rx buffer offset */
+    unsigned char   mode_telnet;        /* Telnet mode */
+    unsigned char   mode_rfc2217;       /* RFC-2217 mode */
+
+    unsigned int    baudrate;
+    unsigned char   datasize;
+    unsigned char   parity;
+    unsigned char   stopsize;
+
+    unsigned char   linestate;
+    unsigned char   modemstate;
+
+    unsigned char   linestate_mask;
+    unsigned char   modemstate_mask;
+
+    char            dtr_state;
+    char            rts_state;
+} tn_ctx_t;
+
+extern tn_ctx_t *telnet_ctx_init(void *cctx, cli_tx_f * ftx, cli_ss_f * fss);
+
+extern int      telnet_rx(tn_ctx_t * tcc, char *buf, int *plen);
+extern int      telnet_tx(tn_ctx_t * tcc, const char *buf, int len);
+
+extern void     telnet_reply_opt(tn_ctx_t * tcc, int opt, int prm,
+                                 const void *val, int len);
+
+extern void     telnet_rfc2217_init(tn_ctx_t * tcc, int when);
+extern void     telnet_rfc2217_handle_opt(tn_ctx_t * tcc, int opt,
+                                          unsigned char *pu, int nd);
+
+extern void     telnet_rfc2217_change_linestate(tn_ctx_t * tcc, int mask);
+extern void     telnet_rfc2217_change_modemstate(tn_ctx_t * tcc, int mask);
+
+/* Init modes */
+#define TNI_INIT    0           /* Init context     */
+#define TNI_ON      1           /* Option activated */
+
+/* Signals that may be passed to cli_ss_f() */
+#define TNS_DTR     1
+#define TNS_RTS     2
+
+#endif /* TELNET_SERVER_H */