--- /dev/null
+/*
+ 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 use with -h parameter:
+ log2pcaphex < samba-log-file | text2pcap -T 139,139 - foo.pcap
+
+ TODO: Have correct IP and TCP checksums.
+
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.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 magic;
+ uint16 major;
+ uint16 minor;
+ int32 zone;
+ uint32 sigfigs;
+ uint32 snaplen;
+ uint32 linktype;
+};
+
+struct tcpdump_packet {
+ struct timeval ts;
+ uint32 caplen;
+ uint32 len;
+};
+
+typedef struct {
+ uint8 ver_hdrlen;
+ uint8 dscp;
+ uint16 packet_length;
+ uint16 identification;
+ uint8 flags;
+ uint8 fragment;
+ uint8 ttl;
+ uint8 protocol;
+ uint16 hdr_checksum;
+ uint32 src_addr;
+ uint32 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 source_port;
+ uint16 dest_port;
+ uint32 seq_num;
+ uint32 ack_num;
+ uint8 hdr_length;
+ uint8 flags;
+ uint16 window;
+ uint16 checksum;
+ uint16 urg;
+} hdr_tcp_t;
+
+static hdr_tcp_t HDR_TCP = {139, 139, 0, 0, 0x50, 0, 0, 0, 0};
+
+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);
+}
+
+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);
+}
+
+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");
+ }
+}
+
+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 = 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;
+long curpacket_len = 0;
+
+void read_log_msg(FILE *in, unsigned char **_buffer, long *buffersize, long *data_offset, long *data_length)
+{
+ unsigned char *buffer;
+ int tmp; long i;
+ assert(fscanf(in, " size=%ld\n", buffersize));
+ *buffersize+=4; /* for netbios */
+ buffer = malloc(*buffersize);
+ memset(buffer, 0, *buffersize);
+ /* NetBIOS */
+ buffer[0] = 0x00;
+ buffer[1] = 0x00;
+ memcpy(buffer+2, &buffersize, 2);
+ 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;
+ assert(fscanf(in, " smb_rcls=%d\n", &tmp)); buffer[smb_rcls] = tmp;
+ assert(fscanf(in, " smb_reh=%d\n", &tmp)); buffer[smb_reh] = tmp;
+ assert(fscanf(in, " smb_err=%d\n", &tmp)); memcpy(buffer+smb_err, &tmp, 2);
+ assert(fscanf(in, " smb_flg=%d\n", &tmp)); buffer[smb_flg] = tmp;
+ assert(fscanf(in, " smb_flg2=%d\n", &tmp)); memcpy(buffer+smb_flg2, &tmp, 2);
+ assert(fscanf(in, " smb_tid=%d\n", &tmp)); memcpy(buffer+smb_tid, &tmp, 2);
+ assert(fscanf(in, " smb_pid=%d\n", &tmp)); memcpy(buffer+smb_pid, &tmp, 2);
+ assert(fscanf(in, " smb_uid=%d\n", &tmp)); memcpy(buffer+smb_uid, &tmp, 2);
+ assert(fscanf(in, " smb_mid=%d\n", &tmp)); memcpy(buffer+smb_mid, &tmp, 2);
+ assert(fscanf(in, " smt_wct=%d\n", &tmp)); buffer[smb_wct] = tmp;
+ for(i = 0; i < buffer[smb_wct]; i++) {
+ assert(fscanf(in, " smb_vwv[%*2d]=%*5d (0x%X)\n", &tmp));
+ 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;
+ (*data_offset)+=2;
+ *_buffer = buffer;
+}
+
+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 data after each line */
+ assert(fscanf(in, "%8s %8s", real[0], real[1]) == 2);
+ }
+ ret = fscanf(in, " [%03lX]", &addr);
+ if(!ret) {
+ if(!quiet)fprintf(stderr, "Only first %ld bytes are logged, packet trace will be incomplete\nTry a higher log level\n", i);
+ return i-1;
+ }
+ assert(addr == i);
+ }
+ if(!fscanf(in, "%02X", &tmp)) {
+ if(!quiet)fprintf(stderr, "Only first %ld bytes are logged, packet trace will be incomplete\nTry a higher log level\n", i-1);
+ return i-1;
+ }
+ buffer[i] = tmp;
+ }
+ return data_length;
+}
+
+int main (int argc, char **argv)
+{
+ const char *infile, *outfile;
+ FILE *out, *in;
+ int opt;
+ poptContext pc;
+ char buffer[4096];
+ long data_offset, data_length;
+ long data_bytes_read = 0;
+ int in_packet = 0;
+ struct poptOption long_options[] = {
+ POPT_AUTOHELP
+ { "quiet", 'q', POPT_ARG_NONE, &quiet, 0, "Be quiet, don't output warnings" },
+ { "hex", 'h', POPT_ARG_NONE, &hexformat, 0, "Output format readable by text2pcap" },
+ POPT_TABLEEND
+ };
+
+ pc = poptGetContext(NULL, argc, (const char **) argv, long_options,
+ POPT_CONTEXT_KEEP_FIRST);
+ poptSetOtherOptionHelp(pc, "[<infile> [<outfile>]]");
+
+
+ while((opt = poptGetNextOpt(pc)) != -1) {
+ switch (opt) {
+ }
+ }
+
+ poptGetArg(pc); /* Drop argv[0], the program name */
+
+ infile = poptGetArg(pc);
+
+ if(infile) {
+ in = fopen(infile, "r");
+ if(!in) {
+ perror("fopen");
+ 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);
+ }
+ }
+
+ if(!outfile) out = stdout;
+
+ if(!hexformat)print_pcap_header(out);
+
+ while(!feof(in)) {
+ fgets(buffer, sizeof(buffer), in);
+ 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;
+ }
+ }
+ }
+
+ return 0;
+}
projects / samba / blobdiff