source: branches/samba-3.5.x/source3/utils/log2pcaphex.c@ 773

Last change on this file since 773 was 414, checked in by Herwig Bauernfeind, 15 years ago

Samba 3.5.0: Initial import
File size: 10.5 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 Utility to extract pcap files from samba (log level 10) log files
4
5 Copyright (C) Jelmer Vernooij 2003
6 Thanks to Tim Potter for the genial idea
7
8 Portions (from capconvert.c) (C) Andrew Tridgell 1997
9 Portions (from text2pcap.c) (C) Ashok Narayanan 2001
10
11 Example:
12 Output NBSS(SMB) packets in hex and convert to pcap adding
13 Eth/IP/TCP headers
14
15 log2pcap -h < samba.log | text2pcap -T 139,139 - samba.pcap
16
17 Output directly to pcap format without Eth headers or TCP
18 sequence numbers
19
20 log2pcap samba.log samba.pcap
21
22 TODO:
23 - Hex to text2pcap outputs are not properly parsed in Wireshark
24 the NBSS or SMB level. This is a bug.
25 - Writing directly to pcap format doesn't include sequence numbers
26 in the TCP packets
27 - Check if a packet is a response or request and set IP to/from
28 addresses accordingly. Currently all packets come from the same
29 dummy IP and go to the same dummy IP
30 - Add a message when done parsing about the number of pacekts
31 processed
32 - Parse NBSS packet header data from log file
33 - Have correct IP and TCP checksums.
34
35 Warning:
36 Samba log level 10 outputs a max of 512 bytes from the packet data
37 section. Packets larger than this will be truncated.
38
39 This program is free software; you can redistribute it and/or modify
40 it under the terms of the GNU General Public License as published by
41 the Free Software Foundation; either version 3 of the License, or
42 (at your option) any later version.
43
44 This program is distributed in the hope that it will be useful,
45 but WITHOUT ANY WARRANTY; without even the implied warranty of
46 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
47 GNU General Public License for more details.
48
49 You should have received a copy of the GNU General Public License
50 along with this program. If not, see <http://www.gnu.org/licenses/>.
51*/
52
53#include "includes.h"
54
55/* We don't care about the paranoid malloc checker in this standalone
56 program */
57#undef malloc
58
59#include <assert.h>
60
61int quiet = 0;
62int hexformat = 0;
63
64#define itoa(a) ((a) < 0xa?'0'+(a):'A' + (a-0xa))
65
66#include <stdlib.h>
67#include <unistd.h>
68#include <sys/time.h>
69#include <stdio.h>
70#include <fcntl.h>
71
72#define TCPDUMP_MAGIC 0xa1b2c3d4
73
74/* tcpdump file format */
75struct tcpdump_file_header {
76 uint32 magic;
77 uint16 major;
78 uint16 minor;
79 int32 zone;
80 uint32 sigfigs;
81 uint32 snaplen;
82 uint32 linktype;
83};
84
85struct tcpdump_packet {
86 struct timeval ts;
87 uint32 caplen;
88 uint32 len;
89};
90
91typedef struct {
92 uint8 ver_hdrlen;
93 uint8 dscp;
94 uint16 packet_length;
95 uint16 identification;
96 uint8 flags;
97 uint8 fragment;
98 uint8 ttl;
99 uint8 protocol;
100 uint16 hdr_checksum;
101 uint32 src_addr;
102 uint32 dest_addr;
103} hdr_ip_t;
104
105static hdr_ip_t HDR_IP = {0x45, 0, 0, 0x3412, 0, 0, 0xff, 6, 0, 0x01010101, 0x02020202};
106
107typedef struct {
108 uint16 source_port;
109 uint16 dest_port;
110 uint32 seq_num;
111 uint32 ack_num;
112 uint8 hdr_length;
113 uint8 flags;
114 uint16 window;
115 uint16 checksum;
116 uint16 urg;
117} hdr_tcp_t;
118
119static hdr_tcp_t HDR_TCP = {139, 139, 0, 0, 0x50, 0, 0, 0, 0};
120
121static void print_pcap_header(FILE *out)
122{
123 struct tcpdump_file_header h;
124 h.magic = TCPDUMP_MAGIC;
125 h.major = 2;
126 h.minor = 4;
127 h.zone = 0;
128 h.sigfigs = 0;
129 h.snaplen = 102400; /* As long packets as possible */
130 h.linktype = 101; /* Raw IP */
131 fwrite(&h, sizeof(struct tcpdump_file_header), 1, out);
132}
133
134static void print_pcap_packet(FILE *out, unsigned char *data, long length,
135 long caplen)
136{
137 static int i = 0;
138 struct tcpdump_packet p;
139 i++;
140 p.ts.tv_usec = 0;
141 p.ts.tv_sec = 0;
142 p.caplen = caplen;
143 p.len = length;
144 fwrite(&p, sizeof(struct tcpdump_packet), 1, out);
145 fwrite(data, sizeof(unsigned char), caplen, out);
146}
147
148static void print_hex_packet(FILE *out, unsigned char *data, long length)
149{
150 long i,cur = 0;
151 while(cur < length) {
152 fprintf(out, "%06lX ", cur);
153 for(i = cur; i < length && i < cur + 16; i++) {
154 fprintf(out, "%02x ", data[i]);
155 }
156
157 cur = i;
158 fprintf(out, "\n");
159 }
160}
161
162static void print_netbios_packet(FILE *out, unsigned char *data, long length,
163 long actual_length)
164{
165 unsigned char *newdata; long offset = 0;
166 long newlen;
167
168 newlen = length+sizeof(HDR_IP)+sizeof(HDR_TCP);
169 newdata = (unsigned char *)malloc(newlen);
170
171 HDR_IP.packet_length = htons(newlen);
172 HDR_TCP.window = htons(0x2000);
173 HDR_TCP.source_port = HDR_TCP.dest_port = htons(139);
174
175 memcpy(newdata+offset, &HDR_IP, sizeof(HDR_IP));offset+=sizeof(HDR_IP);
176 memcpy(newdata+offset, &HDR_TCP, sizeof(HDR_TCP));offset+=sizeof(HDR_TCP);
177 memcpy(newdata+offset,data,length);
178
179 print_pcap_packet(out, newdata, newlen, actual_length+offset);
180 free(newdata);
181}
182
183unsigned char *curpacket = NULL;
184unsigned short curpacket_len = 0;
185long line_num = 0;
186
187/* Read the log message produced by lib/util.c:show_msg() containing the:
188 * SMB_HEADER
189 * SMB_PARAMETERS
190 * SMB_DATA.ByteCount
191 *
192 * Example:
193 * [2007/04/08 20:41:39, 5] lib/util.c:show_msg(516)
194 * size=144
195 * smb_com=0x73
196 * smb_rcls=0
197 * smb_reh=0
198 * smb_err=0
199 * smb_flg=136
200 * smb_flg2=49153
201 * smb_tid=1
202 * smb_pid=65279
203 * smb_uid=0
204 * smb_mid=64
205 * smt_wct=3
206 * smb_vwv[ 0]= 117 (0x75)
207 * smb_vwv[ 1]= 128 (0x80)
208 * smb_vwv[ 2]= 1 (0x1)
209 * smb_bcc=87
210 */
211static void read_log_msg(FILE *in, unsigned char **_buffer,
212 unsigned short *buffersize, long *data_offset,
213 long *data_length)
214{
215 unsigned char *buffer;
216 int tmp; long i;
217 assert(fscanf(in, " size=%hu\n", buffersize)); line_num++;
218 buffer = (unsigned char *)malloc(*buffersize+4); /* +4 for NBSS Header */
219 memset(buffer, 0, *buffersize+4);
220 /* NetBIOS Session Service */
221 buffer[0] = 0x00;
222 buffer[1] = 0x00;
223 memcpy(buffer+2, &buffersize, 2); /* TODO: need to copy as little-endian regardless of platform */
224 /* SMB Packet */
225 buffer[4] = 0xFF;
226 buffer[5] = 'S';
227 buffer[6] = 'M';
228 buffer[7] = 'B';
229 assert(fscanf(in, " smb_com=0x%x\n", &tmp)); buffer[smb_com] = tmp; line_num++;
230 assert(fscanf(in, " smb_rcls=%d\n", &tmp)); buffer[smb_rcls] = tmp; line_num++;
231 assert(fscanf(in, " smb_reh=%d\n", &tmp)); buffer[smb_reh] = tmp; line_num++;
232 assert(fscanf(in, " smb_err=%d\n", &tmp)); memcpy(buffer+smb_err, &tmp, 2); line_num++;
233 assert(fscanf(in, " smb_flg=%d\n", &tmp)); buffer[smb_flg] = tmp; line_num++;
234 assert(fscanf(in, " smb_flg2=%d\n", &tmp)); memcpy(buffer+smb_flg2, &tmp, 2); line_num++;
235 assert(fscanf(in, " smb_tid=%d\n", &tmp)); memcpy(buffer+smb_tid, &tmp, 2); line_num++;
236 assert(fscanf(in, " smb_pid=%d\n", &tmp)); memcpy(buffer+smb_pid, &tmp, 2); line_num++;
237 assert(fscanf(in, " smb_uid=%d\n", &tmp)); memcpy(buffer+smb_uid, &tmp, 2); line_num++;
238 assert(fscanf(in, " smb_mid=%d\n", &tmp)); memcpy(buffer+smb_mid, &tmp, 2); line_num++;
239 assert(fscanf(in, " smt_wct=%d\n", &tmp)); buffer[smb_wct] = tmp; line_num++;
240 for(i = 0; i < buffer[smb_wct]; i++) {
241 assert(fscanf(in, " smb_vwv[%*3d]=%*5d (0x%X)\n", &tmp)); line_num++;
242 memcpy(buffer+smb_vwv+i*2, &tmp, 2);
243 }
244
245 *data_offset = smb_vwv+buffer[smb_wct]*2;
246 assert(fscanf(in, " smb_bcc=%ld\n", data_length)); buffer[(*data_offset)] = *data_length; line_num++;
247 (*data_offset)+=2;
248 *_buffer = buffer;
249}
250
251/* Read the log message produced by lib/util.c:dump_data() containing:
252 * SMB_DATA.Bytes
253 *
254 * Example:
255 * [2007/04/08 20:41:39, 10] lib/util.c:dump_data(2243)
256 * [000] 00 55 00 6E 00 69 00 78 00 00 00 53 00 61 00 6D .U.n.i.x ...S.a.m
257 * [010] 00 62 00 61 00 20 00 33 00 2E 00 30 00 2E 00 32 .b.a. .3 ...0...2
258 * [020] 00 34 00 2D 00 49 00 73 00 69 00 6C 00 6F 00 6E .4.-.I.s .i.l.o.n
259 * [030] 00 20 00 4F 00 6E 00 65 00 46 00 53 00 20 00 76 . .O.n.e .F.S. .v
260 * [040] 00 34 00 2E 00 30 00 00 00 49 00 53 00 49 00 4C .4...0.. .I.S.I.L
261 * [050] 00 4F 00 4E 00 00 00 .O.N...
262 */
263static long read_log_data(FILE *in, unsigned char *buffer, long data_length)
264{
265 long i, addr; char real[2][16]; int ret;
266 unsigned int tmp;
267 for(i = 0; i < data_length; i++) {
268 if(i % 16 == 0){
269 if(i != 0) {
270 /* Read and discard the ascii data after each line. */
271 assert(fscanf(in, " %8c %8c\n", real[0], real[1]) == 2);
272 }
273 ret = fscanf(in, " [%03lX]", &addr); line_num++;
274 if(!ret) {
275 if(!quiet)
276 fprintf(stderr, "%ld: Only first %ld bytes are logged, "
277 "packet trace will be incomplete\n", line_num, i-1);
278 return i-1;
279 }
280 assert(addr == i);
281 }
282 if(!fscanf(in, "%02X", &tmp)) {
283 if(!quiet)
284 fprintf(stderr, "%ld: Log message formated incorrectly. "
285 "Only first %ld bytes are logged, packet trace will "
286 "be incomplete\n", line_num, i-1);
287 while ((tmp = getc(in)) != '\n');
288 return i-1;
289 }
290 buffer[i] = tmp;
291 }
292
293 /* Consume the newline so we don't increment num_lines twice */
294 while ((tmp = getc(in)) != '\n');
295 return data_length;
296}
297
298int main (int argc, char **argv)
299{
300 const char *infile, *outfile;
301 FILE *out, *in;
302 int opt;
303 poptContext pc;
304 char buffer[4096];
305 long data_offset, data_length;
306 long data_bytes_read = 0;
307 int in_packet = 0;
308 struct poptOption long_options[] = {
309 POPT_AUTOHELP
310 { "quiet", 'q', POPT_ARG_NONE, &quiet, 0, "Be quiet, don't output warnings" },
311 { "hex", 'h', POPT_ARG_NONE, &hexformat, 0, "Output format readable by text2pcap" },
312 POPT_TABLEEND
313 };
314
315 pc = poptGetContext(NULL, argc, (const char **) argv, long_options,
316 POPT_CONTEXT_KEEP_FIRST);
317 poptSetOtherOptionHelp(pc, "[<infile> [<outfile>]]");
318
319
320 while((opt = poptGetNextOpt(pc)) != -1) {
321 switch (opt) {
322 }
323 }
324
325 poptGetArg(pc); /* Drop argv[0], the program name */
326
327 infile = poptGetArg(pc);
328
329 if(infile) {
330 in = fopen(infile, "r");
331 if(!in) {
332 perror("fopen");
333 return 1;
334 }
335 } else in = stdin;
336
337 outfile = poptGetArg(pc);
338
339 if(outfile) {
340 out = fopen(outfile, "w+");
341 if(!out) {
342 perror("fopen");
343 fprintf(stderr, "Can't find %s, using stdout...\n", outfile);
344 return 1;
345 }
346 }
347
348 if(!outfile) out = stdout;
349
350 if(!hexformat)print_pcap_header(out);
351
352 while(!feof(in)) {
353 fgets(buffer, sizeof(buffer), in); line_num++;
354 if(buffer[0] == '[') { /* Header */
355 if(strstr(buffer, "show_msg")) {
356 in_packet++;
357 if(in_packet == 1)continue;
358 read_log_msg(in, &curpacket, &curpacket_len, &data_offset, &data_length);
359 } else if(in_packet && strstr(buffer, "dump_data")) {
360 data_bytes_read = read_log_data(in, curpacket+data_offset, data_length);
361 } else {
362 if(in_packet){
363 if(hexformat) print_hex_packet(out, curpacket, curpacket_len);
364 else print_netbios_packet(out, curpacket, curpacket_len, data_bytes_read+data_offset);
365 free(curpacket);
366 }
367 in_packet = 0;
368 }
369 }
370 }
371
372 if (in != stdin) {
373 fclose(in);
374 }
375
376 if (out != stdout) {
377 fclose(out);
378 }
379
380 return 0;
381}
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