From 8ec8e8a051c57230443e97279b274fcb620e9540 Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Sun, 29 Dec 2019 15:50:32 +0100
Subject: [WIP] prometheus module (with prometheus_vty)

---
 include/osmocom/vty/prometheus.h | 135 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 135 insertions(+)
 create mode 100644 include/osmocom/vty/prometheus.h

(limited to 'include/osmocom/vty/prometheus.h')

diff --git a/include/osmocom/vty/prometheus.h b/include/osmocom/vty/prometheus.h
new file mode 100644
index 00000000..2a09a127
--- /dev/null
+++ b/include/osmocom/vty/prometheus.h
@@ -0,0 +1,135 @@
+#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;
+};
-- 
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