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-rw-r--r--source3/utils/log2pcaphex.c410
1 files changed, 410 insertions, 0 deletions
diff --git a/source3/utils/log2pcaphex.c b/source3/utils/log2pcaphex.c
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+/*
+ Unix SMB/CIFS implementation.
+ Utility to extract pcap files from samba (log level 10) log files
+
+ Copyright (C) Jelmer Vernooij 2003
+ Thanks to Tim Potter for the genial idea
+
+ Portions (from capconvert.c) (C) Andrew Tridgell 1997
+ Portions (from text2pcap.c) (C) Ashok Narayanan 2001
+
+ Example:
+ Output NBSS(SMB) packets in hex and convert to pcap adding
+ Eth/IP/TCP headers
+
+ log2pcap -h < samba.log | text2pcap -T 139,139 - samba.pcap
+
+ Output directly to pcap format without Eth headers or TCP
+ sequence numbers
+
+ log2pcap samba.log samba.pcap
+
+ TODO:
+ - Hex to text2pcap outputs are not properly parsed in Wireshark
+ the NBSS or SMB level. This is a bug.
+ - Writing directly to pcap format doesn't include sequence numbers
+ in the TCP packets
+ - Check if a packet is a response or request and set IP to/from
+ addresses accordingly. Currently all packets come from the same
+ dummy IP and go to the same dummy IP
+ - Add a message when done parsing about the number of pacekts
+ processed
+ - Parse NBSS packet header data from log file
+ - Have correct IP and TCP checksums.
+
+ Warning:
+ Samba log level 10 outputs a max of 512 bytes from the packet data
+ section. Packets larger than this will be truncated.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any 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
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include <popt.h>
+
+/* We don't care about the paranoid malloc checker in this standalone
+ program */
+#undef malloc
+
+#include <assert.h>
+
+int quiet = 0;
+int hexformat = 0;
+
+#define itoa(a) ((a) < 0xa?'0'+(a):'A' + (a-0xa))
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <stdio.h>
+#include <fcntl.h>
+
+#define TCPDUMP_MAGIC 0xa1b2c3d4
+
+/* tcpdump file format */
+struct tcpdump_file_header {
+ uint32_t magic;
+ uint16_t major;
+ uint16_t minor;
+ int32_t zone;
+ uint32_t sigfigs;
+ uint32_t snaplen;
+ uint32_t linktype;
+};
+
+struct tcpdump_packet {
+ struct timeval ts;
+ uint32_t caplen;
+ uint32_t len;
+};
+
+typedef struct {
+ uint8_t ver_hdrlen;
+ uint8_t dscp;
+ uint16_t packet_length;
+ uint16_t identification;
+ uint8_t flags;
+ uint8_t fragment;
+ uint8_t ttl;
+ uint8_t protocol;
+ uint16_t hdr_checksum;
+ uint32_t src_addr;
+ uint32_t dest_addr;
+} hdr_ip_t;
+
+static hdr_ip_t HDR_IP = {0x45, 0, 0, 0x3412, 0, 0, 0xff, 6, 0, 0x01010101, 0x02020202};
+
+typedef struct {
+ uint16_t source_port;
+ uint16_t dest_port;
+ uint32_t seq_num;
+ uint32_t ack_num;
+ uint8_t hdr_length;
+ uint8_t flags;
+ uint16_t window;
+ uint16_t checksum;
+ uint16_t urg;
+} hdr_tcp_t;
+
+static hdr_tcp_t HDR_TCP = {139, 139, 0, 0, 0x50, 0, 0, 0, 0};
+
+static void print_pcap_header(FILE *out)
+{
+ struct tcpdump_file_header h;
+ h.magic = TCPDUMP_MAGIC;
+ h.major = 2;
+ h.minor = 4;
+ h.zone = 0;
+ h.sigfigs = 0;
+ h.snaplen = 102400; /* As long packets as possible */
+ h.linktype = 101; /* Raw IP */
+ fwrite(&h, sizeof(struct tcpdump_file_header), 1, out);
+}
+
+static void print_pcap_packet(FILE *out, unsigned char *data, long length,
+ long caplen)
+{
+ static int i = 0;
+ struct tcpdump_packet p;
+ i++;
+ p.ts.tv_usec = 0;
+ p.ts.tv_sec = 0;
+ p.caplen = caplen;
+ p.len = length;
+ fwrite(&p, sizeof(struct tcpdump_packet), 1, out);
+ fwrite(data, sizeof(unsigned char), caplen, out);
+}
+
+static void print_hex_packet(FILE *out, unsigned char *data, long length)
+{
+ long i,cur = 0;
+ while(cur < length) {
+ fprintf(out, "%06lX ", cur);
+ for(i = cur; i < length && i < cur + 16; i++) {
+ fprintf(out, "%02x ", data[i]);
+ }
+ cur = i;
+ fprintf(out, "\n");
+ }
+}
+
+static void print_netbios_packet(FILE *out, unsigned char *data, long length,
+ long actual_length)
+{
+ unsigned char *newdata; long offset = 0;
+ long newlen;
+
+ newlen = length+sizeof(HDR_IP)+sizeof(HDR_TCP);
+ newdata = (unsigned char *)malloc(newlen);
+
+ HDR_IP.packet_length = htons(newlen);
+ HDR_TCP.window = htons(0x2000);
+ HDR_TCP.source_port = HDR_TCP.dest_port = htons(139);
+
+ memcpy(newdata+offset, &HDR_IP, sizeof(HDR_IP));offset+=sizeof(HDR_IP);
+ memcpy(newdata+offset, &HDR_TCP, sizeof(HDR_TCP));offset+=sizeof(HDR_TCP);
+ memcpy(newdata+offset,data,length);
+
+ print_pcap_packet(out, newdata, newlen, actual_length+offset);
+ free(newdata);
+}
+
+unsigned char *curpacket = NULL;
+unsigned short curpacket_len = 0;
+long line_num = 0;
+
+/* Read the log message produced by lib/util.c:show_msg() containing the:
+ * SMB_HEADER
+ * SMB_PARAMETERS
+ * SMB_DATA.ByteCount
+ *
+ * Example:
+ * [2007/04/08 20:41:39, 5] lib/util.c:show_msg(516)
+ * size=144
+ * smb_com=0x73
+ * smb_rcls=0
+ * smb_reh=0
+ * smb_err=0
+ * smb_flg=136
+ * smb_flg2=49153
+ * smb_tid=1
+ * smb_pid=65279
+ * smb_uid=0
+ * smb_mid=64
+ * smt_wct=3
+ * smb_vwv[ 0]= 117 (0x75)
+ * smb_vwv[ 1]= 128 (0x80)
+ * smb_vwv[ 2]= 1 (0x1)
+ * smb_bcc=87
+ */
+static void read_log_msg(FILE *in, unsigned char **_buffer,
+ unsigned short *buffersize, long *data_offset,
+ long *data_length)
+{
+ unsigned char *buffer;
+ int tmp; long i;
+ assert(fscanf(in, " size=%hu\n", buffersize)); line_num++;
+ buffer = (unsigned char *)malloc(*buffersize+4); /* +4 for NBSS Header */
+ memset(buffer, 0, *buffersize+4);
+ /* NetBIOS Session Service */
+ buffer[0] = 0x00;
+ buffer[1] = 0x00;
+ memcpy(buffer+2, &buffersize, 2); /* TODO: need to copy as little-endian regardless of platform */
+ /* SMB Packet */
+ buffer[4] = 0xFF;
+ buffer[5] = 'S';
+ buffer[6] = 'M';
+ buffer[7] = 'B';
+ assert(fscanf(in, " smb_com=0x%x\n", &tmp)); buffer[smb_com] = tmp; line_num++;
+ assert(fscanf(in, " smb_rcls=%d\n", &tmp)); buffer[smb_rcls] = tmp; line_num++;
+ assert(fscanf(in, " smb_reh=%d\n", &tmp)); buffer[smb_reh] = tmp; line_num++;
+ assert(fscanf(in, " smb_err=%d\n", &tmp)); memcpy(buffer+smb_err, &tmp, 2); line_num++;
+ assert(fscanf(in, " smb_flg=%d\n", &tmp)); buffer[smb_flg] = tmp; line_num++;
+ assert(fscanf(in, " smb_flg2=%d\n", &tmp)); memcpy(buffer+smb_flg2, &tmp, 2); line_num++;
+ assert(fscanf(in, " smb_tid=%d\n", &tmp)); memcpy(buffer+smb_tid, &tmp, 2); line_num++;
+ assert(fscanf(in, " smb_pid=%d\n", &tmp)); memcpy(buffer+smb_pid, &tmp, 2); line_num++;
+ assert(fscanf(in, " smb_uid=%d\n", &tmp)); memcpy(buffer+smb_uid, &tmp, 2); line_num++;
+ assert(fscanf(in, " smb_mid=%d\n", &tmp)); memcpy(buffer+smb_mid, &tmp, 2); line_num++;
+ assert(fscanf(in, " smt_wct=%d\n", &tmp)); buffer[smb_wct] = tmp; line_num++;
+ for(i = 0; i < buffer[smb_wct]; i++) {
+ assert(fscanf(in, " smb_vwv[%*3d]=%*5d (0x%X)\n", &tmp)); line_num++;
+ memcpy(buffer+smb_vwv+i*2, &tmp, 2);
+ }
+
+ *data_offset = smb_vwv+buffer[smb_wct]*2;
+ assert(fscanf(in, " smb_bcc=%ld\n", data_length)); buffer[(*data_offset)] = *data_length; line_num++;
+ (*data_offset)+=2;
+ *_buffer = buffer;
+}
+
+/* Read the log message produced by lib/util.c:dump_data() containing:
+ * SMB_DATA.Bytes
+ *
+ * Example:
+ * [2007/04/08 20:41:39, 10] lib/util.c:dump_data(2243)
+ * [000] 00 55 00 6E 00 69 00 78 00 00 00 53 00 61 00 6D .U.n.i.x ...S.a.m
+ * [010] 00 62 00 61 00 20 00 33 00 2E 00 30 00 2E 00 32 .b.a. .3 ...0...2
+ * [020] 00 34 00 2D 00 49 00 73 00 69 00 6C 00 6F 00 6E .4.-.I.s .i.l.o.n
+ * [030] 00 20 00 4F 00 6E 00 65 00 46 00 53 00 20 00 76 . .O.n.e .F.S. .v
+ * [040] 00 34 00 2E 00 30 00 00 00 49 00 53 00 49 00 4C .4...0.. .I.S.I.L
+ * [050] 00 4F 00 4E 00 00 00 .O.N...
+ */
+static long read_log_data(FILE *in, unsigned char *buffer, long data_length)
+{
+ long i, addr; char real[2][16]; int ret;
+ unsigned int tmp;
+ for(i = 0; i < data_length; i++) {
+ if(i % 16 == 0){
+ if(i != 0) {
+ /* Read and discard the ascii data after each line. */
+ assert(fscanf(in, " %8c %8c\n", real[0], real[1]) == 2);
+ }
+ ret = fscanf(in, " [%03lX]", &addr); line_num++;
+ if(!ret) {
+ if(!quiet)
+ fprintf(stderr, "%ld: Only first %ld bytes are logged, "
+ "packet trace will be incomplete\n", line_num, i-1);
+ return i-1;
+ }
+ assert(addr == i);
+ }
+ if(!fscanf(in, "%02X", &tmp)) {
+ if(!quiet)
+ fprintf(stderr, "%ld: Log message formatted incorrectly. "
+ "Only first %ld bytes are logged, packet trace will "
+ "be incomplete\n", line_num, i-1);
+ while ((tmp = getc(in)) != '\n');
+ return i-1;
+ }
+ buffer[i] = tmp;
+ }
+
+ /* Consume the newline so we don't increment num_lines twice */
+ while ((tmp = getc(in)) != '\n');
+ return data_length;
+}
+
+int main(int argc, const char **argv)
+{
+ const char *infile, *outfile;
+ FILE *out, *in;
+ int opt;
+ poptContext pc;
+ char buffer[4096];
+ long data_offset = 0;
+ long data_length = 0;
+ long data_bytes_read = 0;
+ size_t in_packet = 0;
+ struct poptOption long_options[] = {
+ POPT_AUTOHELP
+ {
+ .longName = "quiet",
+ .shortName = 'q',
+ .argInfo = POPT_ARG_NONE,
+ .arg = &quiet,
+ .val = 0,
+ .descrip = "Be quiet, don't output warnings",
+ },
+ {
+ .longName = "hex",
+ .shortName = 'h',
+ .argInfo = POPT_ARG_NONE,
+ .arg = &hexformat,
+ .val = 0,
+ .descrip = "Output format readable by text2pcap",
+ },
+ POPT_TABLEEND
+ };
+
+ pc = poptGetContext(NULL, argc, argv, long_options,
+ POPT_CONTEXT_KEEP_FIRST);
+ poptSetOtherOptionHelp(pc, "[<infile> [<outfile>]]");
+
+
+ while((opt = poptGetNextOpt(pc)) != -1) {
+ switch (opt) {
+ case POPT_ERROR_BADOPT:
+ fprintf(stderr, "\nInvalid option %s: %s\n\n",
+ poptBadOption(pc, 0), poptStrerror(opt));
+ poptPrintUsage(pc, stderr, 0);
+ exit(1);
+ }
+ }
+
+ poptGetArg(pc); /* Drop argv[0], the program name */
+
+ infile = poptGetArg(pc);
+
+ if(infile) {
+ in = fopen(infile, "r");
+ if(!in) {
+ perror("fopen");
+ poptFreeContext(pc);
+ return 1;
+ }
+ } else in = stdin;
+
+ outfile = poptGetArg(pc);
+
+ if(outfile) {
+ out = fopen(outfile, "w+");
+ if(!out) {
+ perror("fopen");
+ fprintf(stderr, "Can't find %s, using stdout...\n", outfile);
+ poptFreeContext(pc);
+ return 1;
+ }
+ }
+
+ if(!outfile) out = stdout;
+
+ if(!hexformat)print_pcap_header(out);
+
+ while(!feof(in)) {
+ char *p;
+ p = fgets(buffer, sizeof(buffer), in);
+ if (p == NULL) {
+ fprintf(stderr, "error reading from input file\n");
+ break;
+ }
+ line_num++;
+ if(buffer[0] == '[') { /* Header */
+ if(strstr(buffer, "show_msg")) {
+ in_packet++;
+ if(in_packet == 1)continue;
+ read_log_msg(in, &curpacket, &curpacket_len, &data_offset, &data_length);
+ } else if(in_packet && strstr(buffer, "dump_data")) {
+ data_bytes_read = read_log_data(in, curpacket+data_offset, data_length);
+ } else {
+ if(in_packet){
+ if(hexformat) print_hex_packet(out, curpacket, curpacket_len);
+ else print_netbios_packet(out, curpacket, curpacket_len, data_bytes_read+data_offset);
+ free(curpacket);
+ }
+ in_packet = 0;
+ }
+ }
+ }
+
+ if (in != stdin) {
+ fclose(in);
+ }
+
+ if (out != stdout) {
+ fclose(out);
+ }
+
+ poptFreeContext(pc);
+ return 0;
+}
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