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48 lines
1.6 KiB
48 lines
1.6 KiB
3 years ago
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/**
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* Telnet middleware that handles characters read by console and acts on telnet escapes,
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* removing them from the stream
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*
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* Created on 2019/02/17.
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*/
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#ifndef CSPEMU_TELNET_PARSER_H
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#define CSPEMU_TELNET_PARSER_H
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#include <console/cmddef.h>
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/**
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* Process a buffer of received characters, handling and removing telnet codes.
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* The buffer is modified in place and the number of data characters is returned.
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*
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* @param[in,out] buffer - buffer to process
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* @param len - original number of characters in the buffer
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* @return - number of characters left in the buffer, to be passed to the console handler
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*/
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size_t telnet_middleware_read(console_ctx_t *cctx, uint8_t *buffer, size_t len);
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enum telnet_option {
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OPT_BINARY = 0,
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OPT_ECHO = 1,
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OPT_SUPPRESS_GO_AHEAD = 3,
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OPT_STATUS = 5,
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OPT_TIMING_MARK = 6,
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OPT_TERMINAL_TYPE = 24,
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OPT_END_OF_RECORD = 25,
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OPT_NEGOTIATE_WINDOW_SIZE = 31,
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OPT_NEGOTIATE_TERMINAL_SPEED = 32,
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OPT_REMOTE_FLOW_CONTROL = 33,
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// OPT_COMPORT_OPTION = 34, - according to RFC, but seems replaced by...
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OPT_LINEMODE = 34,
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OPT_X_DISPLAY_LOCATION = 35,
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OPT_NEW_ENVIRON = 39,
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OPT_EXOPL = 255,
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};
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void telnet_send_subnegotiate(console_ctx_t *cctx, enum telnet_option opt, const uint8_t *data, size_t len);
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void telnet_send_will(console_ctx_t *cctx, enum telnet_option opt);
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void telnet_send_wont(console_ctx_t *cctx, enum telnet_option opt);
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void telnet_send_do(console_ctx_t *cctx, enum telnet_option opt);
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void telnet_send_dont(console_ctx_t *cctx, enum telnet_option opt);
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#endif //CSPEMU_TELNET_PARSER_H
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