| 1 | /** @file
|
|---|
| 2 | *
|
|---|
| 3 | * Debugger TCP backend
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006-2007 innotek GmbH
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License as published by the Free Software Foundation,
|
|---|
| 13 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
|
|---|
| 14 | * distribution. VirtualBox OSE is distributed in the hope that it will
|
|---|
| 15 | * be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | */
|
|---|
| 17 |
|
|---|
| 18 | /*******************************************************************************
|
|---|
| 19 | * Header Files *
|
|---|
| 20 | *******************************************************************************/
|
|---|
| 21 | #include <VBox/dbg.h>
|
|---|
| 22 | #include <VBox/cfgm.h>
|
|---|
| 23 | #include <VBox/err.h>
|
|---|
| 24 |
|
|---|
| 25 | #include <iprt/thread.h>
|
|---|
| 26 | #include <iprt/tcp.h>
|
|---|
| 27 | #include <VBox/log.h>
|
|---|
| 28 | #include <iprt/assert.h>
|
|---|
| 29 |
|
|---|
| 30 | #include <string.h>
|
|---|
| 31 |
|
|---|
| 32 |
|
|---|
| 33 | /*******************************************************************************
|
|---|
| 34 | * Structures and Typedefs *
|
|---|
| 35 | *******************************************************************************/
|
|---|
| 36 | /**
|
|---|
| 37 | * Debug console TCP backend instance data.
|
|---|
| 38 | */
|
|---|
| 39 | typedef struct DBGCTCP
|
|---|
| 40 | {
|
|---|
| 41 | /** The I/O backend for the console. */
|
|---|
| 42 | DBGCBACK Back;
|
|---|
| 43 | /** The socket of the connection. */
|
|---|
| 44 | RTSOCKET Sock;
|
|---|
| 45 | /** Connection status. */
|
|---|
| 46 | bool fAlive;
|
|---|
| 47 | } DBGCTCP;
|
|---|
| 48 | /** Pointer to the instance data of the console TCP backend. */
|
|---|
| 49 | typedef DBGCTCP *PDBGCTCP;
|
|---|
| 50 |
|
|---|
| 51 | /** Converts a pointer to DBGCTCP::Back to a pointer to DBGCTCP. */
|
|---|
| 52 | #define DBGCTCP_BACK2DBGCTCP(pBack) ( (PDBGCTCP)((char *)pBack - RT_OFFSETOF(DBGCTCP, Back)) )
|
|---|
| 53 |
|
|---|
| 54 |
|
|---|
| 55 | /*******************************************************************************
|
|---|
| 56 | * Internal Functions *
|
|---|
| 57 | *******************************************************************************/
|
|---|
| 58 | static int dbgcTcpConnection(RTSOCKET Sock, void *pvUser);
|
|---|
| 59 |
|
|---|
| 60 |
|
|---|
| 61 |
|
|---|
| 62 | /**
|
|---|
| 63 | * Checks if there is input.
|
|---|
| 64 | *
|
|---|
| 65 | * @returns true if there is input ready.
|
|---|
| 66 | * @returns false if there not input ready.
|
|---|
| 67 | * @param pBack Pointer to the backend structure supplied by
|
|---|
| 68 | * the backend. The backend can use this to find
|
|---|
| 69 | * it's instance data.
|
|---|
| 70 | * @param cMillies Number of milliseconds to wait on input data.
|
|---|
| 71 | */
|
|---|
| 72 | static DECLCALLBACK(bool) dbgcTcpBackInput(PDBGCBACK pBack, uint32_t cMillies)
|
|---|
| 73 | {
|
|---|
| 74 | PDBGCTCP pDbgcTcp = DBGCTCP_BACK2DBGCTCP(pBack);
|
|---|
| 75 | if (!pDbgcTcp->fAlive)
|
|---|
| 76 | return false;
|
|---|
| 77 | int rc = RTTcpSelectOne(pDbgcTcp->Sock, cMillies);
|
|---|
| 78 | if (VBOX_FAILURE(rc) && rc != VERR_TIMEOUT)
|
|---|
| 79 | pDbgcTcp->fAlive = false;
|
|---|
| 80 | return rc != VERR_TIMEOUT;
|
|---|
| 81 | }
|
|---|
| 82 |
|
|---|
| 83 |
|
|---|
| 84 | /**
|
|---|
| 85 | * Read input.
|
|---|
| 86 | *
|
|---|
| 87 | * @returns VBox status code.
|
|---|
| 88 | * @param pBack Pointer to the backend structure supplied by
|
|---|
| 89 | * the backend. The backend can use this to find
|
|---|
| 90 | * it's instance data.
|
|---|
| 91 | * @param pvBuf Where to put the bytes we read.
|
|---|
| 92 | * @param cbBuf Maximum nymber of bytes to read.
|
|---|
| 93 | * @param pcbRead Where to store the number of bytes actually read.
|
|---|
| 94 | * If NULL the entire buffer must be filled for a
|
|---|
| 95 | * successful return.
|
|---|
| 96 | */
|
|---|
| 97 | static DECLCALLBACK(int) dbgcTcpBackRead(PDBGCBACK pBack, void *pvBuf, size_t cbBuf, size_t *pcbRead)
|
|---|
| 98 | {
|
|---|
| 99 | PDBGCTCP pDbgcTcp = DBGCTCP_BACK2DBGCTCP(pBack);
|
|---|
| 100 | if (!pDbgcTcp->fAlive)
|
|---|
| 101 | return VERR_INVALID_HANDLE;
|
|---|
| 102 | int rc = RTTcpRead(pDbgcTcp->Sock, pvBuf, cbBuf, pcbRead);
|
|---|
| 103 | if (VBOX_FAILURE(rc))
|
|---|
| 104 | pDbgcTcp->fAlive = false;
|
|---|
| 105 | return rc;
|
|---|
| 106 | }
|
|---|
| 107 |
|
|---|
| 108 | /**
|
|---|
| 109 | * Write (output).
|
|---|
| 110 | *
|
|---|
| 111 | * @returns VBox status code.
|
|---|
| 112 | * @param pBack Pointer to the backend structure supplied by
|
|---|
| 113 | * the backend. The backend can use this to find
|
|---|
| 114 | * it's instance data.
|
|---|
| 115 | * @param pvBuf What to write.
|
|---|
| 116 | * @param cbBuf Number of bytes to write.
|
|---|
| 117 | * @param pcbWritten Where to store the number of bytes actually written.
|
|---|
| 118 | * If NULL the entire buffer must be successfully written.
|
|---|
| 119 | */
|
|---|
| 120 | static DECLCALLBACK(int) dbgcTcpBackWrite(PDBGCBACK pBack, const void *pvBuf, size_t cbBuf, size_t *pcbWritten)
|
|---|
| 121 | {
|
|---|
| 122 | PDBGCTCP pDbgcTcp = DBGCTCP_BACK2DBGCTCP(pBack);
|
|---|
| 123 | if (!pDbgcTcp->fAlive)
|
|---|
| 124 | return VERR_INVALID_HANDLE;
|
|---|
| 125 |
|
|---|
| 126 | /*
|
|---|
| 127 | * convert '\n' to '\r\n' while writing.
|
|---|
| 128 | */
|
|---|
| 129 | int rc = 0;
|
|---|
| 130 | size_t cbLeft = cbBuf;
|
|---|
| 131 | while (cbLeft)
|
|---|
| 132 | {
|
|---|
| 133 | size_t cb = cbLeft;
|
|---|
| 134 | /* write newlines */
|
|---|
| 135 | if (*(const char *)pvBuf == '\n')
|
|---|
| 136 | {
|
|---|
| 137 | rc = RTTcpWrite(pDbgcTcp->Sock, "\n\r", 2);
|
|---|
| 138 | cb = 1;
|
|---|
| 139 | }
|
|---|
| 140 | /* write till next newline */
|
|---|
| 141 | else
|
|---|
| 142 | {
|
|---|
| 143 | const char *pszNL = (const char *)memchr(pvBuf, '\n', cbLeft);
|
|---|
| 144 | if (pszNL)
|
|---|
| 145 | cb = (uintptr_t)pszNL - (uintptr_t)pvBuf;
|
|---|
| 146 | rc = RTTcpWrite(pDbgcTcp->Sock, pvBuf, cb);
|
|---|
| 147 | }
|
|---|
| 148 | if (VBOX_FAILURE(rc))
|
|---|
| 149 | {
|
|---|
| 150 | pDbgcTcp->fAlive = false;
|
|---|
| 151 | break;
|
|---|
| 152 | }
|
|---|
| 153 |
|
|---|
| 154 | /* advance */
|
|---|
| 155 | cbLeft -= cb;
|
|---|
| 156 | pvBuf = (const char *)pvBuf + cb;
|
|---|
| 157 | }
|
|---|
| 158 |
|
|---|
| 159 | /*
|
|---|
| 160 | * Set returned value and return.
|
|---|
| 161 | */
|
|---|
| 162 | if (pcbWritten)
|
|---|
| 163 | *pcbWritten = cbBuf - cbLeft;
|
|---|
| 164 | return rc;
|
|---|
| 165 | }
|
|---|
| 166 |
|
|---|
| 167 |
|
|---|
| 168 | /**
|
|---|
| 169 | * Serve a TCP Server connection.
|
|---|
| 170 | *
|
|---|
| 171 | * @returns VBox status.
|
|---|
| 172 | * @returns VERR_TCP_SERVER_STOP to terminate the server loop forcing
|
|---|
| 173 | * the RTTcpCreateServer() call to return.
|
|---|
| 174 | * @param Sock The socket which the client is connected to.
|
|---|
| 175 | * The call will close this socket.
|
|---|
| 176 | * @param pvUser The VM handle.
|
|---|
| 177 | */
|
|---|
| 178 | static int dbgcTcpConnection(RTSOCKET Sock, void *pvUser)
|
|---|
| 179 | {
|
|---|
| 180 | LogFlow(("dbgcTcpConnection: connection! Sock=%d pvUser=%p\n", Sock, pvUser));
|
|---|
| 181 |
|
|---|
| 182 | /*
|
|---|
| 183 | * Start the console.
|
|---|
| 184 | */
|
|---|
| 185 | DBGCTCP DbgcTcp;
|
|---|
| 186 | DbgcTcp.Back.pfnInput = dbgcTcpBackInput;
|
|---|
| 187 | DbgcTcp.Back.pfnRead = dbgcTcpBackRead;
|
|---|
| 188 | DbgcTcp.Back.pfnWrite = dbgcTcpBackWrite;
|
|---|
| 189 | DbgcTcp.fAlive = true;
|
|---|
| 190 | DbgcTcp.Sock = Sock;
|
|---|
| 191 | int rc = DBGCCreate((PVM)pvUser, &DbgcTcp.Back, 0);
|
|---|
| 192 | LogFlow(("dbgcTcpConnection: disconnect rc=%Vrc\n", rc));
|
|---|
| 193 | return rc;
|
|---|
| 194 | }
|
|---|
| 195 |
|
|---|
| 196 |
|
|---|
| 197 | /**
|
|---|
| 198 | * Spawns a new thread with a TCP based debugging console service.
|
|---|
| 199 | *
|
|---|
| 200 | * @returns VBox status.
|
|---|
| 201 | * @param pVM VM handle.
|
|---|
| 202 | * @param ppvData Where to store a pointer to the instance data.
|
|---|
| 203 | */
|
|---|
| 204 | DBGDECL(int) DBGCTcpCreate(PVM pVM, void **ppvData)
|
|---|
| 205 | {
|
|---|
| 206 | /*
|
|---|
| 207 | * Check what the configuration says.
|
|---|
| 208 | */
|
|---|
| 209 | PCFGMNODE pKey = CFGMR3GetChild(CFGMR3GetRoot(pVM), "DBGC");
|
|---|
| 210 | bool fEnabled;
|
|---|
| 211 | int rc = CFGMR3QueryBool(pKey, "Enabled", &fEnabled);
|
|---|
| 212 | if (rc == VERR_CFGM_VALUE_NOT_FOUND || rc == VERR_CFGM_NO_PARENT)
|
|---|
| 213 | #if defined(DEBUG) && !defined(__L4ENV__) && !defined(DEBUG_dmik)
|
|---|
| 214 | fEnabled = true;
|
|---|
| 215 | #else
|
|---|
| 216 | fEnabled = false;
|
|---|
| 217 | #endif
|
|---|
| 218 | else if (VBOX_FAILURE(rc))
|
|---|
| 219 | {
|
|---|
| 220 | AssertMsgFailed(("Configuration error: Querying \"Enabled\" -> %Vrc\n", rc));
|
|---|
| 221 | return rc;
|
|---|
| 222 | }
|
|---|
| 223 | if (!fEnabled)
|
|---|
| 224 | {
|
|---|
| 225 | LogFlow(("DBGCTcpCreate: returns VINF_SUCCESS (Disabled)\n"));
|
|---|
| 226 | return VINF_SUCCESS;
|
|---|
| 227 | }
|
|---|
| 228 |
|
|---|
| 229 | /*
|
|---|
| 230 | * Get the port configuration.
|
|---|
| 231 | */
|
|---|
| 232 | uint32_t u32Port;
|
|---|
| 233 | rc = CFGMR3QueryU32(pKey, "Port", &u32Port);
|
|---|
| 234 | if (rc == VERR_CFGM_VALUE_NOT_FOUND || rc == VERR_CFGM_NO_PARENT)
|
|---|
| 235 | u32Port = 5000;
|
|---|
| 236 | else if (VBOX_FAILURE(rc))
|
|---|
| 237 | {
|
|---|
| 238 | AssertMsgFailed(("Configuration error: Querying \"Port\" -> %Vrc\n", rc));
|
|---|
| 239 | return rc;
|
|---|
| 240 | }
|
|---|
| 241 |
|
|---|
| 242 | /*
|
|---|
| 243 | * Get the address configuration.
|
|---|
| 244 | */
|
|---|
| 245 | char szAddress[512];
|
|---|
| 246 | rc = CFGMR3QueryString(pKey, "Address", szAddress, sizeof(szAddress));
|
|---|
| 247 | if (rc == VERR_CFGM_VALUE_NOT_FOUND || rc == VERR_CFGM_NO_PARENT)
|
|---|
| 248 | szAddress[0] = '\0';
|
|---|
| 249 | else if (VBOX_FAILURE(rc))
|
|---|
| 250 | {
|
|---|
| 251 | AssertMsgFailed(("Configuration error: Querying \"Address\" -> %Vrc\n", rc));
|
|---|
| 252 | return rc;
|
|---|
| 253 | }
|
|---|
| 254 |
|
|---|
| 255 | /*
|
|---|
| 256 | * Create the server (separate thread).
|
|---|
| 257 | */
|
|---|
| 258 | PRTTCPSERVER pServer;
|
|---|
| 259 | rc = RTTcpServerCreate(szAddress, u32Port, RTTHREADTYPE_DEBUGGER, "DBGC", dbgcTcpConnection, pVM, &pServer);
|
|---|
| 260 | if (VBOX_SUCCESS(rc))
|
|---|
| 261 | {
|
|---|
| 262 | LogFlow(("DBGCTcpCreate: Created server on port %d %s\n", u32Port, szAddress));
|
|---|
| 263 | *ppvData = pServer;
|
|---|
| 264 | }
|
|---|
| 265 |
|
|---|
| 266 | LogFlow(("DBGCTcpCreate: returns %Vrc\n", rc));
|
|---|
| 267 | return rc;
|
|---|
| 268 | }
|
|---|
| 269 |
|
|---|
| 270 |
|
|---|
| 271 | /**
|
|---|
| 272 | * Terminates any running TCP base debugger consolse service.
|
|---|
| 273 | *
|
|---|
| 274 | * @returns VBox status.
|
|---|
| 275 | * @param pVM VM handle.
|
|---|
| 276 | */
|
|---|
| 277 | DBGDECL(int) DBGCTcpTerminate(PVM pVM, void *pvData)
|
|---|
| 278 | {
|
|---|
| 279 | /*
|
|---|
| 280 | * Destroy the server instance if any.
|
|---|
| 281 | */
|
|---|
| 282 | if (pvData)
|
|---|
| 283 | {
|
|---|
| 284 | int rc = RTTcpServerDestroy((PRTTCPSERVER)pvData);
|
|---|
| 285 | AssertRC(rc);
|
|---|
| 286 | }
|
|---|
| 287 |
|
|---|
| 288 | return VINF_SUCCESS;
|
|---|
| 289 | }
|
|---|
| 290 |
|
|---|
