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/*********************************************************
* Copyright (C) 2006 VMware, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation version 2.1 and no later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the Lesser GNU General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
*********************************************************/
/*
* xferlogs.c --
*
* Simple program based on rpctool to dump the vm-support output to
* the vmx log file base64 encoded, it can dump any file supplied on the
* commandline to the vmx log. It also does the decoding part of it
* it can read the vmware.log file decode and write the encoded files in
* the directory it was invoked.
*
* example of a transfer found in the vmx log file.
* Aug 24 18:48:09: vcpu-0| Guest: >Logfile Begins : /root/install.log: ver - 1
* Aug 24 18:48:09: vcpu-0| Guest: >SW5zdGFsbGluZyA0NDEgcGFja2FnZXMKCkluc3RhbGxpbmcgZ2xpYmMtY29tbW9uLTIuMi41LTM0
* Aug 24 18:48:09: vcpu-0| Guest: >LgpJbnN0YWxsaW5nIGh3ZGF0YS0wLjE0LTEuCkluc3RhbGxpbmcgaW5kZXhodG1sLTcuMy0zLgpJ
* Aug 24 18:48:09: vcpu-0| Guest: >bnN0YWxsaW5nIG1haWxjYXAtMi4xLjktMi4KSW5zdGFsbGluZyBtYW4tcGFnZXMtMS40OC0yLgpJ
* ....
* ....
* Aug 24 18:48:10: vcpu-0| Guest: >Mi4K
* Aug 24 18:48:10: vcpu-0| Guest: >Logfile Ends
*
*/
#include <stdio.h>
#include <wchar.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include "vmware.h"
#include "vmsupport.h"
#include "rpcvmx.h"
#include "rpcout.h"
#include "base64.h"
#include "str.h"
#include "strutil.h"
#include "xferlogs_version.h"
#include "embed_version.h"
VM_EMBED_VERSION(XFERLOGS_VERSION_STRING);
/*
* "The resultant base64-encoded data exceeds the original in length by the
* ratio 4:3, and typically appears to consist of seemingly random characters.
* As newlines, represented by a CR+LF pair, are inserted in the encoded data
* every 76 characters, the actual length of the encoded data is approximately
* 136.8% of the original." - Base64 Wiki
* And just so that it produces 80 char output.
*/
#define BUF_BASE64_SIZE 57
#define BUF_OUT_SIZE 256
#define LOG_GUEST_MARK "Guest: >"
#define LOG_START_MARK ">Logfile Begins "
#define LOG_END_MARK ">Logfile Ends "
typedef enum {
NOT_IN_GUEST_LOGGING,
IN_GUEST_LOGGING
} extractMode;
#define LOG_VERSION 1
/*
* The function definitions of Warning and Debug were the same, So I elected
* to do this. Or the other alternative was to define it again.
*/
#define Warning Debug
void Debug(const char *fmt, ...);
/*
*--------------------------------------------------------------------------
*
* xmitFile --
*
* This function transfers a file using the rpc channel in base64
* encoding to the vmx logs.
*
* Results:
* None.
*
* Side effects:
* The program would exit if an error occurs in Base64_Encode.
* Output is added to the vmx log file.
*
*--------------------------------------------------------------------------
*/
static void
xmitFile(char *filename) //IN : file to be transmitted.
{
FILE *fp;
size_t readLen;
char buf[BUF_BASE64_SIZE];
/*
* We have a unique identifier saying that this is guest dumping the
* output of logs and not any other logging information from the guest.
*/
char base64B[BUF_BASE64_SIZE * 2] = ">";
char *base64Buf = base64B + 1;
if (!(fp = fopen(filename, "rb"))) {
Warning("Unable to open file %s with errno %d\n", filename, errno);
exit(-1);
}
//XXX the format below is hardcoded and used by extractFile
RpcVMX_Log("%s: %s: ver - %d", LOG_START_MARK, filename, LOG_VERSION);
while ((readLen = fread(buf, 1, sizeof buf, fp)) > 0 ) {
if (Base64_Encode(buf, readLen, base64Buf, sizeof base64B - 1, NULL)) {
RpcVMX_Log("%s", base64B);
} else {
Warning("Error in Base64_Encode\n");
goto exit;
}
}
exit :
RpcVMX_Log(LOG_END_MARK);
fclose(fp);
}
/*
*--------------------------------------------------------------------------
*
* extractFile --
*
* This function iterates through the vmx log file and for every
* line which has a "Guest: >" writes the unencoded base64 output to
* a file, depending on the state machine.
*
* Results:
* None
*
* Side effects:
* The program would exit if unable to read the input file.
* A series of decoded output files are created.
*--------------------------------------------------------------------------
*/
static void
extractFile(char *filename) //IN: vmx log filename e.g. vmware.log
{
FILE *fp;
FILE *outfp = NULL;
char buf[BUF_OUT_SIZE];
uint8 base64Out[BUF_OUT_SIZE];
size_t lenOut;
char fname[256];
char *ptrStr, *logInpFilename, *ver;
int version;
int filenu = 0; // output file enumerator
extractMode state = NOT_IN_GUEST_LOGGING;
if (!(fp = fopen(filename, "rt"))) {
Warning("Error opening file %s, errno %d - %s \n",
filename, errno, strerror(errno));
exit(-1);
}
while (fgets(buf, sizeof buf, fp)) {
/*
* The state machine determines when to open, write and close a file.
*/
if (strstr(buf, LOG_GUEST_MARK)) {
if (strstr(buf, LOG_START_MARK)) { //open a new output file.
ASSERT(outfp == NULL);
ASSERT(state == NOT_IN_GUEST_LOGGING);
state = IN_GUEST_LOGGING;
/*
* read the input filename, which was the filename written by the
* guest.
*/
logInpFilename = strstr(buf, LOG_START_MARK);
logInpFilename += sizeof LOG_START_MARK;
ptrStr = strchr(logInpFilename, ':');
*ptrStr = '\0';
/*
* Ignore the filename in the log, for obvious security reasons
* and create a new filename consiting of time and enumerator.
*/
Str_Sprintf(fname, sizeof fname, "%d_%"FMTTIME".log",
filenu++, time(NULL));
/*
* Read the version information, if they dont match just warn
* and leave the outfp null, so we do process the input file, but
* dont write anything.
*/
ptrStr++;
ver = strstr(ptrStr, "ver - ");
if (!ver) {
Warning("No version information detected\n");
} else {
ver = ver + sizeof "ver - " - 1;
version = strtol(ver, NULL, 0);
if (version != LOG_VERSION) {
Warning("input version %d doesnt match the\
version of this binary %d", version, LOG_VERSION);
} else {
printf("reading file %s to %s \n", logInpFilename, fname);
if (!(outfp = fopen(fname, "wb"))) {
Warning("Error opening file %s\n", fname);
}
}
}
} else if (strstr(buf, LOG_END_MARK)) { // close the output file.
ASSERT(state == IN_GUEST_LOGGING);
state = NOT_IN_GUEST_LOGGING;
fclose(outfp);
outfp = NULL;
} else { // write to the output file
ASSERT(state == IN_GUEST_LOGGING);
if (outfp) {
ptrStr = strstr(buf, LOG_GUEST_MARK);
ptrStr += sizeof LOG_GUEST_MARK - 1;
if (Base64_Decode(ptrStr, base64Out, BUF_OUT_SIZE, &lenOut)) {
if (fwrite(base64Out, 1, lenOut, outfp) != lenOut) {
Warning("Error writing output\n");
}
} else {
Warning("Error decoding output %s\n", ptrStr);
}
}
}
}
}
fclose(fp);
}
static void usage(void) {
Warning("xferlogs <options> <filename>\n");
Warning("options - enc/dec\n");
}
int
main(int argc, char *argv[])
{
int status;
if (argc < 2) {
usage();
return -1;
} if (argc == 2) {
RpcVMX_Log("%s", argv[1]);
return 0;
}
if (!strncmp(argv[1], "enc", 3)) {
xmitFile(argv[2]);
} else if(!strncmp(argv[1], "dec", 3)) {
extractFile(argv[2]);
} else if(!strncmp(argv[1], "upd", 3)) {
if (argc == 3 && StrUtil_StrToInt(&status, argv[2])) {
RpcOut_sendOne(NULL, NULL, RPC_VMSUPPORT_STATUS " %d", status);
} else {
return -1;
}
} else {
usage();
return -1;
}
return 0;
}
void
Panic(const char *fmt, ...)
{
va_list args;
char buf[1024];
va_start(args, fmt);
Str_Vsnprintf(buf, sizeof buf, fmt, args);
va_end(args);
fputs(buf, stderr);
abort();
}
void
Debug(const char *fmt, ...)
{
va_list args;
char *buf;
va_start(args, fmt);
buf = (char *)Str_Vasprintf(NULL, fmt, args);
va_end(args);
fprintf(stderr, "xferlogs: %s\n", buf);
fflush(stderr);
}
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