| 1 | /* $Id: DBGCTcp.cpp 62480 2016-07-22 18:29:41Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * DBGC - Debugger Console, TCP backend.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006-2016 Oracle Corporation
|
|---|
| 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 (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | */
|
|---|
| 17 |
|
|---|
| 18 |
|
|---|
| 19 | /*********************************************************************************************************************************
|
|---|
| 20 | * Header Files *
|
|---|
| 21 | *********************************************************************************************************************************/
|
|---|
| 22 | #include <VBox/dbg.h>
|
|---|
| 23 | #include <VBox/vmm/cfgm.h>
|
|---|
| 24 | #include <VBox/err.h>
|
|---|
| 25 |
|
|---|
| 26 | #include <iprt/thread.h>
|
|---|
| 27 | #include <iprt/tcp.h>
|
|---|
| 28 | #include <VBox/log.h>
|
|---|
| 29 | #include <iprt/assert.h>
|
|---|
| 30 |
|
|---|
| 31 | #include <iprt/string.h>
|
|---|
| 32 |
|
|---|
| 33 |
|
|---|
| 34 | /*********************************************************************************************************************************
|
|---|
| 35 | * Structures and Typedefs *
|
|---|
| 36 | *********************************************************************************************************************************/
|
|---|
| 37 | /**
|
|---|
| 38 | * Debug console TCP backend instance data.
|
|---|
| 39 | */
|
|---|
| 40 | typedef struct DBGCTCP
|
|---|
| 41 | {
|
|---|
| 42 | /** The I/O backend for the console. */
|
|---|
| 43 | DBGCBACK Back;
|
|---|
| 44 | /** The socket of the connection. */
|
|---|
| 45 | RTSOCKET Sock;
|
|---|
| 46 | /** Connection status. */
|
|---|
| 47 | bool fAlive;
|
|---|
| 48 | } DBGCTCP;
|
|---|
| 49 | /** Pointer to the instance data of the console TCP backend. */
|
|---|
| 50 | typedef DBGCTCP *PDBGCTCP;
|
|---|
| 51 |
|
|---|
| 52 | /** Converts a pointer to DBGCTCP::Back to a pointer to DBGCTCP. */
|
|---|
| 53 | #define DBGCTCP_BACK2DBGCTCP(pBack) ( (PDBGCTCP)((char *)pBack - RT_OFFSETOF(DBGCTCP, Back)) )
|
|---|
| 54 |
|
|---|
| 55 |
|
|---|
| 56 | /*********************************************************************************************************************************
|
|---|
| 57 | * Internal Functions *
|
|---|
| 58 | *********************************************************************************************************************************/
|
|---|
| 59 | static DECLCALLBACK(int) dbgcTcpConnection(RTSOCKET Sock, void *pvUser);
|
|---|
| 60 |
|
|---|
| 61 |
|
|---|
| 62 |
|
|---|
| 63 | /**
|
|---|
| 64 | * Checks if there is input.
|
|---|
| 65 | *
|
|---|
| 66 | * @returns true if there is input ready.
|
|---|
| 67 | * @returns false if there not input ready.
|
|---|
| 68 | * @param pBack Pointer to the backend structure supplied by
|
|---|
| 69 | * the backend. The backend can use this to find
|
|---|
| 70 | * it's instance data.
|
|---|
| 71 | * @param cMillies Number of milliseconds to wait on input data.
|
|---|
| 72 | */
|
|---|
| 73 | static DECLCALLBACK(bool) dbgcTcpBackInput(PDBGCBACK pBack, uint32_t cMillies)
|
|---|
| 74 | {
|
|---|
| 75 | PDBGCTCP pDbgcTcp = DBGCTCP_BACK2DBGCTCP(pBack);
|
|---|
| 76 | if (!pDbgcTcp->fAlive)
|
|---|
| 77 | return false;
|
|---|
| 78 | int rc = RTTcpSelectOne(pDbgcTcp->Sock, cMillies);
|
|---|
| 79 | if (RT_FAILURE(rc) && rc != VERR_TIMEOUT)
|
|---|
| 80 | pDbgcTcp->fAlive = false;
|
|---|
| 81 | return rc != VERR_TIMEOUT;
|
|---|
| 82 | }
|
|---|
| 83 |
|
|---|
| 84 |
|
|---|
| 85 | /**
|
|---|
| 86 | * Read input.
|
|---|
| 87 | *
|
|---|
| 88 | * @returns VBox status code.
|
|---|
| 89 | * @param pBack Pointer to the backend structure supplied by
|
|---|
| 90 | * the backend. The backend can use this to find
|
|---|
| 91 | * it's instance data.
|
|---|
| 92 | * @param pvBuf Where to put the bytes we read.
|
|---|
| 93 | * @param cbBuf Maximum nymber of bytes to read.
|
|---|
| 94 | * @param pcbRead Where to store the number of bytes actually read.
|
|---|
| 95 | * If NULL the entire buffer must be filled for a
|
|---|
| 96 | * successful return.
|
|---|
| 97 | */
|
|---|
| 98 | static DECLCALLBACK(int) dbgcTcpBackRead(PDBGCBACK pBack, void *pvBuf, size_t cbBuf, size_t *pcbRead)
|
|---|
| 99 | {
|
|---|
| 100 | PDBGCTCP pDbgcTcp = DBGCTCP_BACK2DBGCTCP(pBack);
|
|---|
| 101 | if (!pDbgcTcp->fAlive)
|
|---|
| 102 | return VERR_INVALID_HANDLE;
|
|---|
| 103 | int rc = RTTcpRead(pDbgcTcp->Sock, pvBuf, cbBuf, pcbRead);
|
|---|
| 104 | if (RT_SUCCESS(rc) && pcbRead != NULL && *pcbRead == 0)
|
|---|
| 105 | rc = VERR_NET_SHUTDOWN;
|
|---|
| 106 | if (RT_FAILURE(rc))
|
|---|
| 107 | pDbgcTcp->fAlive = false;
|
|---|
| 108 | return rc;
|
|---|
| 109 | }
|
|---|
| 110 |
|
|---|
| 111 | /**
|
|---|
| 112 | * Write (output).
|
|---|
| 113 | *
|
|---|
| 114 | * @returns VBox status code.
|
|---|
| 115 | * @param pBack Pointer to the backend structure supplied by
|
|---|
| 116 | * the backend. The backend can use this to find
|
|---|
| 117 | * it's instance data.
|
|---|
| 118 | * @param pvBuf What to write.
|
|---|
| 119 | * @param cbBuf Number of bytes to write.
|
|---|
| 120 | * @param pcbWritten Where to store the number of bytes actually written.
|
|---|
| 121 | * If NULL the entire buffer must be successfully written.
|
|---|
| 122 | */
|
|---|
| 123 | static DECLCALLBACK(int) dbgcTcpBackWrite(PDBGCBACK pBack, const void *pvBuf, size_t cbBuf, size_t *pcbWritten)
|
|---|
| 124 | {
|
|---|
| 125 | PDBGCTCP pDbgcTcp = DBGCTCP_BACK2DBGCTCP(pBack);
|
|---|
| 126 | if (!pDbgcTcp->fAlive)
|
|---|
| 127 | return VERR_INVALID_HANDLE;
|
|---|
| 128 |
|
|---|
| 129 | /*
|
|---|
| 130 | * convert '\n' to '\r\n' while writing.
|
|---|
| 131 | */
|
|---|
| 132 | int rc = 0;
|
|---|
| 133 | size_t cbLeft = cbBuf;
|
|---|
| 134 | while (cbLeft)
|
|---|
| 135 | {
|
|---|
| 136 | size_t cb = cbLeft;
|
|---|
| 137 | /* write newlines */
|
|---|
| 138 | if (*(const char *)pvBuf == '\n')
|
|---|
| 139 | {
|
|---|
| 140 | rc = RTTcpWrite(pDbgcTcp->Sock, "\r\n", 2);
|
|---|
| 141 | cb = 1;
|
|---|
| 142 | }
|
|---|
| 143 | /* write till next newline */
|
|---|
| 144 | else
|
|---|
| 145 | {
|
|---|
| 146 | const char *pszNL = (const char *)memchr(pvBuf, '\n', cbLeft);
|
|---|
| 147 | if (pszNL)
|
|---|
| 148 | cb = (uintptr_t)pszNL - (uintptr_t)pvBuf;
|
|---|
| 149 | rc = RTTcpWrite(pDbgcTcp->Sock, pvBuf, cb);
|
|---|
| 150 | }
|
|---|
| 151 | if (RT_FAILURE(rc))
|
|---|
| 152 | {
|
|---|
| 153 | pDbgcTcp->fAlive = false;
|
|---|
| 154 | break;
|
|---|
| 155 | }
|
|---|
| 156 |
|
|---|
| 157 | /* advance */
|
|---|
| 158 | cbLeft -= cb;
|
|---|
| 159 | pvBuf = (const char *)pvBuf + cb;
|
|---|
| 160 | }
|
|---|
| 161 |
|
|---|
| 162 | /*
|
|---|
| 163 | * Set returned value and return.
|
|---|
| 164 | */
|
|---|
| 165 | if (pcbWritten)
|
|---|
| 166 | *pcbWritten = cbBuf - cbLeft;
|
|---|
| 167 | return rc;
|
|---|
| 168 | }
|
|---|
| 169 |
|
|---|
| 170 | /** @copydoc FNDBGCBACKSETREADY */
|
|---|
| 171 | static DECLCALLBACK(void) dbgcTcpBackSetReady(PDBGCBACK pBack, bool fBusy)
|
|---|
| 172 | {
|
|---|
| 173 | /* stub */
|
|---|
| 174 | NOREF(pBack);
|
|---|
| 175 | NOREF(fBusy);
|
|---|
| 176 | }
|
|---|
| 177 |
|
|---|
| 178 |
|
|---|
| 179 | /**
|
|---|
| 180 | * Serve a TCP Server connection.
|
|---|
| 181 | *
|
|---|
| 182 | * @returns VBox status code.
|
|---|
| 183 | * @returns VERR_TCP_SERVER_STOP to terminate the server loop forcing
|
|---|
| 184 | * the RTTcpCreateServer() call to return.
|
|---|
| 185 | * @param Sock The socket which the client is connected to.
|
|---|
| 186 | * The call will close this socket.
|
|---|
| 187 | * @param pvUser The VM handle.
|
|---|
| 188 | */
|
|---|
| 189 | static DECLCALLBACK(int) dbgcTcpConnection(RTSOCKET Sock, void *pvUser)
|
|---|
| 190 | {
|
|---|
| 191 | LogFlow(("dbgcTcpConnection: connection! Sock=%d pvUser=%p\n", Sock, pvUser));
|
|---|
| 192 |
|
|---|
| 193 | /*
|
|---|
| 194 | * Start the console.
|
|---|
| 195 | */
|
|---|
| 196 | DBGCTCP DbgcTcp;
|
|---|
| 197 | DbgcTcp.Back.pfnInput = dbgcTcpBackInput;
|
|---|
| 198 | DbgcTcp.Back.pfnRead = dbgcTcpBackRead;
|
|---|
| 199 | DbgcTcp.Back.pfnWrite = dbgcTcpBackWrite;
|
|---|
| 200 | DbgcTcp.Back.pfnSetReady = dbgcTcpBackSetReady;
|
|---|
| 201 | DbgcTcp.fAlive = true;
|
|---|
| 202 | DbgcTcp.Sock = Sock;
|
|---|
| 203 | int rc = DBGCCreate((PUVM)pvUser, &DbgcTcp.Back, 0);
|
|---|
| 204 | LogFlow(("dbgcTcpConnection: disconnect rc=%Rrc\n", rc));
|
|---|
| 205 | return rc;
|
|---|
| 206 | }
|
|---|
| 207 |
|
|---|
| 208 |
|
|---|
| 209 | /**
|
|---|
| 210 | * Spawns a new thread with a TCP based debugging console service.
|
|---|
| 211 | *
|
|---|
| 212 | * @returns VBox status code.
|
|---|
| 213 | * @param pUVM The user mode VM handle.
|
|---|
| 214 | * @param ppvData Where to store a pointer to the instance data.
|
|---|
| 215 | */
|
|---|
| 216 | DBGDECL(int) DBGCTcpCreate(PUVM pUVM, void **ppvData)
|
|---|
| 217 | {
|
|---|
| 218 | /*
|
|---|
| 219 | * Check what the configuration says.
|
|---|
| 220 | */
|
|---|
| 221 | PCFGMNODE pKey = CFGMR3GetChild(CFGMR3GetRootU(pUVM), "DBGC");
|
|---|
| 222 | bool fEnabled;
|
|---|
| 223 | int rc = CFGMR3QueryBoolDef(pKey, "Enabled", &fEnabled,
|
|---|
| 224 | #if defined(VBOX_WITH_DEBUGGER) && defined(VBOX_WITH_DEBUGGER_TCP_BY_DEFAULT) && !defined(__L4ENV__) && !defined(DEBUG_dmik)
|
|---|
| 225 | true
|
|---|
| 226 | #else
|
|---|
| 227 | false
|
|---|
| 228 | #endif
|
|---|
| 229 | );
|
|---|
| 230 | if (RT_FAILURE(rc))
|
|---|
| 231 | return VM_SET_ERROR_U(pUVM, rc, "Configuration error: Failed querying \"DBGC/Enabled\"");
|
|---|
| 232 |
|
|---|
| 233 | if (!fEnabled)
|
|---|
| 234 | {
|
|---|
| 235 | LogFlow(("DBGCTcpCreate: returns VINF_SUCCESS (Disabled)\n"));
|
|---|
| 236 | return VINF_SUCCESS;
|
|---|
| 237 | }
|
|---|
| 238 |
|
|---|
| 239 | /*
|
|---|
| 240 | * Get the port configuration.
|
|---|
| 241 | */
|
|---|
| 242 | uint32_t u32Port;
|
|---|
| 243 | rc = CFGMR3QueryU32Def(pKey, "Port", &u32Port, 5000);
|
|---|
| 244 | if (RT_FAILURE(rc))
|
|---|
| 245 | return VM_SET_ERROR_U(pUVM, rc, "Configuration error: Failed querying \"DBGC/Port\"");
|
|---|
| 246 |
|
|---|
| 247 | /*
|
|---|
| 248 | * Get the address configuration.
|
|---|
| 249 | */
|
|---|
| 250 | char szAddress[512];
|
|---|
| 251 | rc = CFGMR3QueryStringDef(pKey, "Address", szAddress, sizeof(szAddress), "");
|
|---|
| 252 | if (RT_FAILURE(rc))
|
|---|
| 253 | return VM_SET_ERROR_U(pUVM, rc, "Configuration error: Failed querying \"DBGC/Address\"");
|
|---|
| 254 |
|
|---|
| 255 | /*
|
|---|
| 256 | * Create the server (separate thread).
|
|---|
| 257 | */
|
|---|
| 258 | PRTTCPSERVER pServer;
|
|---|
| 259 | rc = RTTcpServerCreate(szAddress, u32Port, RTTHREADTYPE_DEBUGGER, "DBGC", dbgcTcpConnection, pUVM, &pServer);
|
|---|
| 260 | if (RT_SUCCESS(rc))
|
|---|
| 261 | {
|
|---|
| 262 | LogFlow(("DBGCTcpCreate: Created server on port %d %s\n", u32Port, szAddress));
|
|---|
| 263 | *ppvData = pServer;
|
|---|
| 264 | return rc;
|
|---|
| 265 | }
|
|---|
| 266 |
|
|---|
| 267 | LogFlow(("DBGCTcpCreate: returns %Rrc\n", rc));
|
|---|
| 268 | return VM_SET_ERROR_U(pUVM, rc, "Cannot start TCP-based debugging console service");
|
|---|
| 269 | }
|
|---|
| 270 |
|
|---|
| 271 |
|
|---|
| 272 | /**
|
|---|
| 273 | * Terminates any running TCP base debugger console service.
|
|---|
| 274 | *
|
|---|
| 275 | * @returns VBox status code.
|
|---|
| 276 | * @param pUVM The user mode VM handle.
|
|---|
| 277 | * @param pvData The data returned by DBGCTcpCreate.
|
|---|
| 278 | */
|
|---|
| 279 | DBGDECL(int) DBGCTcpTerminate(PUVM pUVM, void *pvData)
|
|---|
| 280 | {
|
|---|
| 281 | /*
|
|---|
| 282 | * Destroy the server instance if any.
|
|---|
| 283 | */
|
|---|
| 284 | if (pvData)
|
|---|
| 285 | {
|
|---|
| 286 | int rc = RTTcpServerDestroy((PRTTCPSERVER)pvData);
|
|---|
| 287 | AssertRC(rc);
|
|---|
| 288 | }
|
|---|
| 289 |
|
|---|
| 290 | return VINF_SUCCESS;
|
|---|
| 291 | }
|
|---|
| 292 |
|
|---|
