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authorJack Humbert <jack.humb@gmail.com>2017-07-07 11:55:23 -0400
committerJack Humbert <jack.humb@gmail.com>2017-07-07 11:55:23 -0400
commit60b30c036397cb5627fa374bb930794b225daa29 (patch)
treee156c2d6b27f01db6985f2cc560c9c345d48fdac /Projects/Webserver/Lib/TELNETServerApp.c
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Squashed 'lib/lufa/' content from commit 385d40300
git-subtree-dir: lib/lufa git-subtree-split: 385d4030035dbaf41591309dbde47653bd03841b
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diff --git a/Projects/Webserver/Lib/TELNETServerApp.c b/Projects/Webserver/Lib/TELNETServerApp.c
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+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2017.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+ Permission to use, copy, modify, distribute, and sell this
+ software and its documentation for any purpose is hereby granted
+ without fee, provided that the above copyright notice appear in
+ all copies and that both that the copyright notice and this
+ permission notice and warranty disclaimer appear in supporting
+ documentation, and that the name of the author not be used in
+ advertising or publicity pertaining to distribution of the
+ software without specific, written prior permission.
+
+ The author disclaims all warranties with regard to this
+ software, including all implied warranties of merchantability
+ and fitness. In no event shall the author be liable for any
+ special, indirect or consequential damages or any damages
+ whatsoever resulting from loss of use, data or profits, whether
+ in an action of contract, negligence or other tortious action,
+ arising out of or in connection with the use or performance of
+ this software.
+*/
+
+/** \file
+ *
+ * TELNET Webserver Application. When connected to the uIP stack,
+ * this will serve out raw TELNET to the client on port 23.
+ */
+
+#define INCLUDE_FROM_TELNETSERVERAPP_C
+#include "TELNETServerApp.h"
+
+#if defined(ENABLE_TELNET_SERVER) || defined(__DOXYGEN__)
+
+/** Welcome message to send to a TELNET client when a connection is first made. */
+const char PROGMEM WelcomeHeader[] = "********************************************\r\n"
+ "* LUFA uIP Webserver (TELNET) *\r\n"
+ "********************************************\r\n";
+
+/** Main TELNET menu, giving the user the list of available commands they may issue */
+const char PROGMEM TELNETMenu[] = "\r\n"
+ " == Available Commands: ==\r\n"
+ " c) List Active TCP Connections\r\n"
+ " =========================\r\n"
+ "\r\n>";
+
+/** Header to print before the current connections are printed to the client */
+const char PROGMEM CurrentConnectionsHeader[] = "\r\n* Current TCP Connections: *\r\n";
+
+/** Initialization function for the simple TELNET webserver. */
+void TELNETServerApp_Init(void)
+{
+ /* Listen on port 23 for TELNET connections from hosts */
+ uip_listen(HTONS(TELNET_SERVER_PORT));
+}
+
+/** uIP stack application callback for the TELNET server. This function must be called each time the
+ * TCP/IP stack needs a TCP packet to be processed.
+ */
+void TELNETServerApp_Callback(void)
+{
+ uip_tcp_appstate_t* const AppState = &uip_conn->appstate;
+ char* const AppData = (char*)uip_appdata;
+
+ if (uip_connected())
+ {
+ /* New connection - initialize connection state values */
+ AppState->TELNETServer.CurrentState = TELNET_STATE_SendHeader;
+ }
+
+ if (uip_acked())
+ {
+ /* Progress to the next state once the current state's data has been ACKed */
+ AppState->TELNETServer.CurrentState = AppState->TELNETServer.NextState;
+ }
+
+ if (uip_rexmit() || uip_acked() || uip_newdata() || uip_connected() || uip_poll())
+ {
+ switch (AppState->TELNETServer.CurrentState)
+ {
+ case TELNET_STATE_SendHeader:
+ /* Copy over and send the TELNET welcome message upon first connection */
+ strcpy_P(AppData, WelcomeHeader);
+ uip_send(AppData, strlen(AppData));
+
+ AppState->TELNETServer.NextState = TELNET_STATE_SendMenu;
+ break;
+ case TELNET_STATE_SendMenu:
+ /* Copy over and send the TELNET menu to the client */
+ strcpy_P(AppData, TELNETMenu);
+ uip_send(AppData, strlen(AppData));
+
+ AppState->TELNETServer.NextState = TELNET_STATE_GetCommand;
+ break;
+ case TELNET_STATE_GetCommand:
+ if (!(uip_datalen()))
+ break;
+
+ /* Save the issued command for later processing */
+ AppState->TELNETServer.IssuedCommand = AppData[0];
+
+ AppState->TELNETServer.CurrentState = TELNET_STATE_SendResponse;
+ break;
+ case TELNET_STATE_SendResponse:
+ /* Determine which command was issued, perform command processing */
+ switch (AppState->TELNETServer.IssuedCommand)
+ {
+ case 'c':
+ TELNETServerApp_DisplayTCPConnections();
+ break;
+ default:
+ strcpy_P(AppData, PSTR("Invalid Command.\r\n"));
+ uip_send(AppData, strlen(AppData));
+ break;
+ }
+
+ AppState->TELNETServer.NextState = TELNET_STATE_SendMenu;
+ break;
+ }
+ }
+}
+
+/** Sends a list of active TCP connections to the TELNET client. */
+static void TELNETServerApp_DisplayTCPConnections(void)
+{
+ char* const AppData = (char*)uip_appdata;
+
+ strcpy_P(AppData, CurrentConnectionsHeader);
+
+ uint16_t ResponseLen = strlen(AppData);
+ uint8_t ActiveConnCount = 0;
+
+ /* Loop through the complete uIP TCP connections list, looking for active connections */
+ for (uint8_t i = 0; i < UIP_CONNS; i++)
+ {
+ struct uip_conn* CurrConnection = &uip_conns[i];
+
+ /* If the connection is not closed, it is active and must be added to the out buffer */
+ if (CurrConnection->tcpstateflags != UIP_CLOSED)
+ {
+ /* Add the current connection's details to the out buffer */
+ ResponseLen += sprintf_P(&AppData[ResponseLen], PSTR("%u) %d.%d.%d.%d (Local Port %u <=> Remote Port %u)\r\n"),
+ ++ActiveConnCount,
+ CurrConnection->ripaddr.u8[0],
+ CurrConnection->ripaddr.u8[1],
+ CurrConnection->ripaddr.u8[2],
+ CurrConnection->ripaddr.u8[3],
+ HTONS(CurrConnection->lport), HTONS(CurrConnection->rport));
+ }
+ }
+
+ uip_send(AppData, ResponseLen);
+}
+
+#endif
+