#include <osmocom/core/select.h>


/*! A telnet connection */
struct prom_connection {
	/*! linked list header for internal management */
	struct llist_head entry;
	/*! private data pointer passed through */
	void *priv;
	/*! filedsecriptor (socket ) */
	struct osmo_fd fd;
	/*! VTY instance associated with telnet connection */
	struct prom_vty *vty;
	/*! logging target associated with this telnet connection */
	struct log_target *dbg;
};


int osmo_prom_init(void *ctx, int port);

int osmo_prom_init_dynif(void *ctx, const char *host, int port);

#define PROM_HTTP_BUFSIZ 512

//#define PROM_VTY_BUFSIZ 512

// TODO kill PROM_VTY_MAXHIST
#define PROM_VTY_MAXHIST 0

//
//enum event {
//	PROM_VTY_SERV,
//	PROM_VTY_READ,
//	PROM_VTY_WRITE,
//	PROM_VTY_CLOSED,
//	PROM_VTY_TIMEOUT_RESET,
//};

/*! Internal representation of a single VTY */
struct prom_vty {
	/*! underlying file (if any) */
	FILE *file;

	/*! private data, specified by creator */
	void *priv;

	/*! File descripter of this vty. */
	int fd;

	/*! Is this vty connect to file or not */
	//enum prom_vty_type type;

	/*! Node status of this vty */
	int node;

	/*! Failure count */
	int fail;

	/*! Output buffer. */
	struct buffer *obuf;

	/*! Command input buffer */
	char *buf;

	/*! Command cursor point */
	int cp;

	/*! Command length */
	int length;

	/*! Command max length. */
	int max;

	/*! Histry of command */
	char *hist[PROM_VTY_MAXHIST];

	/*! History lookup current point */
	int hp;

	/*! History insert end point */
	int hindex;

	/*! For current referencing point of interface, route-map,
	   access-list etc... */
	void *index;

	/*! For multiple level index treatment such as key chain and key. */
	void *index_sub;

	/*! For escape character. */
	unsigned char escape;

	/*! Current vty status. */
	enum { PROM_VTY_NORMAL, PROM_VTY_CLOSE, PROM_VTY_MORE, PROM_VTY_MORELINE } status;

	/*! IAC handling
	 *
	 * IAC handling: was the last character received the IAC
	 * (interpret-as-command) escape character (and therefore the next
	 * character will be the command code)?  Refer to Telnet RFC 854. */
	unsigned char iac;

	/*! IAC SB (option subnegotiation) handling */
	unsigned char iac_sb_in_progress;
	/* At the moment, we care only about the NAWS (window size) negotiation,
	 * and that requires just a 5-character buffer (RFC 1073):
	 * <NAWS char> <16-bit width> <16-bit height> */
#define TELNET_NAWS_SB_LEN 5
	/*! sub-negotiation buffer */
	unsigned char sb_buf[TELNET_NAWS_SB_LEN];
	/*! How many subnegotiation characters have we received?  
	 *
	 * We just drop those that do not fit in the buffer. */
	size_t sb_len;

	/*! Window width */
	int width;
	/*! Widnow height */
	int height;

	/*! Configure lines. */
	int lines;

	int monitor;

	/*! In configure mode. */
	int config;

	/*! List of parent nodes, last item is the outermost parent. */
	struct llist_head parent_nodes;

	/*! When reading from a config file, these are the indenting characters expected for children of
	 * the current VTY node. */
	char *indent;
};