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Diffstat (limited to 'source3/utils/log2pcaphex.c')
| -rw-r--r-- | source3/utils/log2pcaphex.c | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/source3/utils/log2pcaphex.c b/source3/utils/log2pcaphex.c new file mode 100644 index 0000000000..4804b99338 --- /dev/null +++ b/source3/utils/log2pcaphex.c @@ -0,0 +1,294 @@ +/* + 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" +#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 char 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, "%02lX", &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; + 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; +} |