int
main(int argc, char *argv[])
{
int opt;
gboolean do_append = FALSE;
gboolean verbose = FALSE;
int in_file_count = 0;
guint snaplen = 0;
#ifdef PCAP_NG_DEFAULT
int file_type = WTAP_FILE_PCAPNG; /* default to pcap format */
#else
int file_type = WTAP_FILE_PCAP; /* default to pcapng format */
#endif
int frame_type = -2;
int out_fd;
merge_in_file_t *in_files = NULL, *in_file;
int i;
struct wtap_pkthdr *phdr, snap_phdr;
wtap_dumper *pdh;
int open_err, read_err = 0, write_err, close_err;
gchar *err_info;
int err_fileno;
char *out_filename = NULL;
gboolean got_read_error = FALSE, got_write_error = FALSE;
int count;
#ifdef _WIN32
arg_list_utf_16to8(argc, argv);
create_app_running_mutex();
#endif /* _WIN32 */
/* Process the options first */
while ((opt = getopt(argc, argv, "aF:hs:T:vw:")) != -1) {
switch (opt) {
case 'a':
do_append = !do_append;
break;
case 'F':
file_type = wtap_short_string_to_file_type(optarg);
if (file_type < 0) {
fprintf(stderr, "mergecap: \"%s\" isn't a valid capture file type\n",
optarg);
list_capture_types();
exit(1);
}
break;
case 'h':
usage();
exit(0);
break;
case 's':
snaplen = get_positive_int(optarg, "snapshot length");
break;
case 'T':
frame_type = wtap_short_string_to_encap(optarg);
if (frame_type < 0) {
fprintf(stderr, "mergecap: \"%s\" isn't a valid encapsulation type\n",
optarg);
list_encap_types();
exit(1);
}
break;
case 'v':
verbose = TRUE;
break;
case 'w':
out_filename = optarg;
break;
case '?': /* Bad options if GNU getopt */
switch(optopt) {
case'F':
list_capture_types();
break;
case'T':
list_encap_types();
break;
default:
usage();
}
exit(1);
break;
}
}
/* check for proper args; at a minimum, must have an output
* filename and one input file
*/
in_file_count = argc - optind;
if (!out_filename) {
fprintf(stderr, "mergecap: an output filename must be set with -w\n");
fprintf(stderr, " run with -h for help\n");
return 1;
}
if (in_file_count < 1) {
fprintf(stderr, "mergecap: No input files were specified\n");
return 1;
}
/* open the input files */
if (!merge_open_in_files(in_file_count, &argv[optind], &in_files,
&open_err, &err_info, &err_fileno)) {
fprintf(stderr, "mergecap: Can't open %s: %s\n", argv[optind + err_fileno],
wtap_strerror(open_err));
switch (open_err) {
case WTAP_ERR_UNSUPPORTED:
case WTAP_ERR_UNSUPPORTED_ENCAP:
case WTAP_ERR_BAD_FILE:
fprintf(stderr, "(%s)\n", err_info);
g_free(err_info);
break;
}
return 2;
}
if (verbose) {
for (i = 0; i < in_file_count; i++)
fprintf(stderr, "mergecap: %s is type %s.\n", argv[optind + i],
wtap_file_type_string(wtap_file_type(in_files[i].wth)));
}
if (snaplen == 0) {
/*
* Snapshot length not specified - default to the maximum of the
* snapshot lengths of the input files.
*/
snaplen = merge_max_snapshot_length(in_file_count, in_files);
}
/* set the outfile frame type */
if (frame_type == -2) {
/*
* Default to the appropriate frame type for the input files.
*/
frame_type = merge_select_frame_type(in_file_count, in_files);
if (verbose) {
if (frame_type == WTAP_ENCAP_PER_PACKET) {
/*
* Find out why we had to choose WTAP_ENCAP_PER_PACKET.
*/
int first_frame_type, this_frame_type;
first_frame_type = wtap_file_encap(in_files[0].wth);
for (i = 1; i < in_file_count; i++) {
this_frame_type = wtap_file_encap(in_files[i].wth);
if (first_frame_type != this_frame_type) {
fprintf(stderr, "mergecap: multiple frame encapsulation types detected\n");
fprintf(stderr, " defaulting to WTAP_ENCAP_PER_PACKET\n");
fprintf(stderr, " %s had type %s (%s)\n",
in_files[0].filename,
wtap_encap_string(first_frame_type),
wtap_encap_short_string(first_frame_type));
fprintf(stderr, " %s had type %s (%s)\n",
in_files[i].filename,
wtap_encap_string(this_frame_type),
wtap_encap_short_string(this_frame_type));
break;
}
}
}
fprintf(stderr, "mergecap: selected frame_type %s (%s)\n",
wtap_encap_string(frame_type),
wtap_encap_short_string(frame_type));
}
}
/* open the outfile */
if (strncmp(out_filename, "-", 2) == 0) {
/* use stdout as the outfile */
out_fd = 1 /*stdout*/;
} else {
/* open the outfile */
out_fd = ws_open(out_filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
if (out_fd == -1) {
fprintf(stderr, "mergecap: Couldn't open output file %s: %s\n",
out_filename, g_strerror(errno));
exit(1);
}
}
/* prepare the outfile */
if(file_type == WTAP_FILE_PCAPNG ){
wtapng_section_t *shb_hdr;
GString *comment_gstr;
shb_hdr = g_new(wtapng_section_t,1);
comment_gstr = g_string_new("File created by merging: \n");
for (i = 0; i < in_file_count; i++) {
g_string_append_printf(comment_gstr, "File%d: %s \n",i+1,in_files[i].filename);
}
shb_hdr->section_length = -1;
/* options */
shb_hdr->opt_comment = comment_gstr->str; /* NULL if not available */
shb_hdr->shb_hardware = NULL; /* NULL if not available, UTF-8 string containing the description of the hardware used to create this section. */
shb_hdr->shb_os = NULL; /* NULL if not available, UTF-8 string containing the name of the operating system used to create this section. */
shb_hdr->shb_user_appl = "mergecap"; /* NULL if not available, UTF-8 string containing the name of the application used to create this section. */
pdh = wtap_dump_fdopen_ng(out_fd, file_type, frame_type, snaplen,
FALSE /* compressed */, shb_hdr, NULL /* wtapng_iface_descriptions_t *idb_inf */, &open_err);
g_string_free(comment_gstr, TRUE);
} else {
pdh = wtap_dump_fdopen(out_fd, file_type, frame_type, snaplen, FALSE /* compressed */, &open_err);
}
if (pdh == NULL) {
merge_close_in_files(in_file_count, in_files);
g_free(in_files);
fprintf(stderr, "mergecap: Can't open or create %s: %s\n", out_filename,
wtap_strerror(open_err));
exit(1);
}
/* do the merge (or append) */
count = 1;
for (;;) {
if (do_append)
in_file = merge_append_read_packet(in_file_count, in_files, &read_err,
&err_info);
else
in_file = merge_read_packet(in_file_count, in_files, &read_err,
&err_info);
if (in_file == NULL) {
/* EOF */
break;
}
if (read_err != 0) {
/* I/O error reading from in_file */
got_read_error = TRUE;
break;
}
if (verbose)
fprintf(stderr, "Record: %u\n", count++);
/* We simply write it, perhaps after truncating it; we could do other
* things, like modify it. */
phdr = wtap_phdr(in_file->wth);
if (snaplen != 0 && phdr->caplen > snaplen) {
snap_phdr = *phdr;
snap_phdr.caplen = snaplen;
phdr = &snap_phdr;
}
if (!wtap_dump(pdh, phdr, wtap_buf_ptr(in_file->wth), &write_err)) {
got_write_error = TRUE;
break;
}
}
merge_close_in_files(in_file_count, in_files);
if (!got_read_error && !got_write_error) {
if (!wtap_dump_close(pdh, &write_err))
got_write_error = TRUE;
} else
wtap_dump_close(pdh, &close_err);
if (got_read_error) {
/*
* Find the file on which we got the error, and report the error.
*/
for (i = 0; i < in_file_count; i++) {
if (in_files[i].state == GOT_ERROR) {
fprintf(stderr, "mergecap: Error reading %s: %s\n",
in_files[i].filename, wtap_strerror(read_err));
switch (read_err) {
case WTAP_ERR_UNSUPPORTED:
case WTAP_ERR_UNSUPPORTED_ENCAP:
case WTAP_ERR_BAD_FILE:
fprintf(stderr, "(%s)\n", err_info);
g_free(err_info);
break;
}
}
}
}
if (got_write_error) {
switch (write_err) {
case WTAP_ERR_UNSUPPORTED_ENCAP:
/*
* This is a problem with the particular frame we're writing;
* note that, and give the frame number.
*/
fprintf(stderr, "mergecap: Frame %u of \"%s\" has a network type that can't be saved in a file with that format\n.",
in_file->packet_num, in_file->filename);
break;
default:
fprintf(stderr, "mergecap: Error writing to outfile: %s\n",
wtap_strerror(write_err));
break;
}
}
g_free(in_files);
return (!got_read_error && !got_write_error) ? 0 : 2;
}
/*
* Merges the files based on given input, and invokes callback during
* execution. Returns MERGE_OK on success, or a MERGE_ERR_XXX on failure; note
* that the passed-in 'err' variable will be more specific to what failed, and
* err_info will have pretty output.
*/
merge_result
merge_files(int out_fd, const gchar* out_filename, const int file_type,
const char *const *in_filenames, const guint in_file_count,
const gboolean do_append, const idb_merge_mode mode,
guint snaplen, const gchar *app_name, merge_progress_callback_t* cb,
int *err, gchar **err_info, guint *err_fileno)
{
merge_in_file_t *in_files = NULL, *in_file = NULL;
int frame_type = WTAP_ENCAP_PER_PACKET;
merge_result status = MERGE_OK;
wtap_dumper *pdh;
struct wtap_pkthdr *phdr, snap_phdr;
int count = 0;
gboolean stop_flag = FALSE;
GArray *shb_hdrs = NULL;
wtapng_iface_descriptions_t *idb_inf = NULL;
g_assert(out_fd > 0);
g_assert(in_file_count > 0);
g_assert(in_filenames != NULL);
g_assert(err != NULL);
g_assert(err_info != NULL);
g_assert(err_fileno != NULL);
/* if a callback was given, it has to have a callback function ptr */
g_assert((cb != NULL) ? (cb->callback_func != NULL) : TRUE);
merge_debug("merge_files: begin");
/* open the input files */
if (!merge_open_in_files(in_file_count, in_filenames, &in_files,
err, err_info, err_fileno)) {
merge_debug("merge_files: merge_open_in_files() failed with err=%d", *err);
return MERGE_ERR_CANT_OPEN_INFILE;
}
if (cb)
cb->callback_func(MERGE_EVENT_INPUT_FILES_OPENED, 0, in_files, in_file_count, cb->data);
if (snaplen == 0) {
/* Snapshot length not specified - default to the maximum. */
snaplen = WTAP_MAX_PACKET_SIZE;
}
/*
* This doesn't tell us that much. It tells us what to set the outfile's
* encap type to, but that's all - for example, it does *not* tells us
* whether the input files had the same number of IDBs, for the same exact
* interfaces, and only one IDB each, so it doesn't actually tell us
* whether we can merge IDBs into one or not.
*/
frame_type = merge_select_frame_type(in_file_count, in_files);
merge_debug("merge_files: got frame_type=%d", frame_type);
if (cb)
cb->callback_func(MERGE_EVENT_FRAME_TYPE_SELECTED, frame_type, in_files, in_file_count, cb->data);
/* prepare the outfile */
if (file_type == WTAP_FILE_TYPE_SUBTYPE_PCAPNG) {
shb_hdrs = create_shb_header(in_files, in_file_count, app_name);
merge_debug("merge_files: SHB created");
idb_inf = generate_merged_idb(in_files, in_file_count, mode);
merge_debug("merge_files: IDB merge operation complete, got %u IDBs", idb_inf ? idb_inf->interface_data->len : 0);
pdh = wtap_dump_fdopen_ng(out_fd, file_type, frame_type, snaplen,
FALSE /* compressed */, shb_hdrs, idb_inf,
NULL, err);
}
else {
pdh = wtap_dump_fdopen(out_fd, file_type, frame_type, snaplen, FALSE /* compressed */, err);
}
if (pdh == NULL) {
merge_close_in_files(in_file_count, in_files);
g_free(in_files);
wtap_block_array_free(shb_hdrs);
wtap_free_idb_info(idb_inf);
return MERGE_ERR_CANT_OPEN_OUTFILE;
}
if (cb)
cb->callback_func(MERGE_EVENT_READY_TO_MERGE, 0, in_files, in_file_count, cb->data);
for (;;) {
*err = 0;
if (do_append) {
in_file = merge_append_read_packet(in_file_count, in_files, err,
err_info);
}
else {
in_file = merge_read_packet(in_file_count, in_files, err,
err_info);
}
if (in_file == NULL) {
/* EOF */
break;
}
if (*err != 0) {
/* I/O error reading from in_file */
status = MERGE_ERR_CANT_READ_INFILE;
break;
}
count++;
if (cb)
stop_flag = cb->callback_func(MERGE_EVENT_PACKET_WAS_READ, count, in_files, in_file_count, cb->data);
if (stop_flag) {
/* The user decided to abort the merge. */
status = MERGE_USER_ABORTED;
break;
}
phdr = wtap_phdr(in_file->wth);
if (snaplen != 0 && phdr->caplen > snaplen) {
/*
* The dumper will only write up to caplen bytes out, so we only
* need to change that value, instead of cloning the whole packet
* with fewer bytes.
*
* XXX: but do we need to change the IDBs' snap_len?
*/
snap_phdr = *phdr;
snap_phdr.caplen = snaplen;
phdr = &snap_phdr;
}
if (file_type == WTAP_FILE_TYPE_SUBTYPE_PCAPNG) {
/*
* XXX - We should do this only for record types
* that pertain to a particular interface; for
* now, we hardcode that, but we need to figure
* out a more general way to handle this.
*/
if (phdr->rec_type == REC_TYPE_PACKET) {
if (!map_phdr_interface_id(phdr, in_file)) {
status = MERGE_ERR_BAD_PHDR_INTERFACE_ID;
break;
}
}
}
if (!wtap_dump(pdh, phdr, wtap_buf_ptr(in_file->wth), err, err_info)) {
status = MERGE_ERR_CANT_WRITE_OUTFILE;
break;
}
}
if (cb)
cb->callback_func(MERGE_EVENT_DONE, count, in_files, in_file_count, cb->data);
merge_close_in_files(in_file_count, in_files);
if (status == MERGE_OK || status == MERGE_USER_ABORTED) {
if (!wtap_dump_close(pdh, err))
status = MERGE_ERR_CANT_CLOSE_OUTFILE;
} else {
/*
* We already got some error; no need to report another error on
* close.
*
* Don't overwrite the earlier error.
*/
int close_err = 0;
(void)wtap_dump_close(pdh, &close_err);
}
if (status != MERGE_OK) {
GString *err_message = NULL;
gchar *display_basename = NULL;
switch(status) {
case MERGE_ERR_CANT_READ_INFILE:
*err_info = get_read_error_string(in_files, in_file_count, err, err_info);
break;
case MERGE_ERR_CANT_WRITE_OUTFILE: /* fall through */
case MERGE_ERR_CANT_CLOSE_OUTFILE:
*err_info = get_write_error_string(in_file, file_type, out_filename, err, err_info);
break;
case MERGE_ERR_BAD_PHDR_INTERFACE_ID:
display_basename = g_filename_display_basename(in_file ? in_file->filename : "UNKNOWN");
if (*err_info != NULL)
g_free(*err_info);
err_message = g_string_new("");
g_string_printf(err_message,
"Record %u of \"%s\" has an interface ID which does not match any IDB in its file.",
in_file ? in_file->packet_num : 0, display_basename);
g_free(display_basename);
*err_info = g_string_free(err_message, FALSE);
break;
case MERGE_USER_ABORTED: /* not really an error */
default:
break;
}
}
g_free(in_files);
wtap_block_array_free(shb_hdrs);
wtap_free_idb_info(idb_inf);
return status;
}
static merge_result
merge_process_packets(wtap_dumper *pdh, const int file_type,
merge_in_file_t *in_files, const guint in_file_count,
const gboolean do_append, guint snaplen,
merge_progress_callback_t* cb,
int *err, gchar **err_info, guint *err_fileno,
guint32 *err_framenum)
{
merge_result status = MERGE_OK;
merge_in_file_t *in_file;
int count = 0;
gboolean stop_flag = FALSE;
struct wtap_pkthdr *phdr, snap_phdr;
for (;;) {
*err = 0;
if (do_append) {
in_file = merge_append_read_packet(in_file_count, in_files, err,
err_info);
}
else {
in_file = merge_read_packet(in_file_count, in_files, err,
err_info);
}
if (in_file == NULL) {
/* We're at EOF on all input files */
break;
}
if (*err != 0) {
/* I/O error reading from in_file */
status = MERGE_ERR_CANT_READ_INFILE;
break;
}
count++;
if (cb)
stop_flag = cb->callback_func(MERGE_EVENT_PACKET_WAS_READ, count, in_files, in_file_count, cb->data);
if (stop_flag) {
/* The user decided to abort the merge. */
status = MERGE_USER_ABORTED;
break;
}
phdr = wtap_phdr(in_file->wth);
if (snaplen != 0 && phdr->caplen > snaplen) {
/*
* The dumper will only write up to caplen bytes out, so we only
* need to change that value, instead of cloning the whole packet
* with fewer bytes.
*
* XXX: but do we need to change the IDBs' snap_len?
*/
snap_phdr = *phdr;
snap_phdr.caplen = snaplen;
phdr = &snap_phdr;
}
if (file_type == WTAP_FILE_TYPE_SUBTYPE_PCAPNG) {
/*
* XXX - We should do this only for record types
* that pertain to a particular interface; for
* now, we hardcode that, but we need to figure
* out a more general way to handle this.
*/
if (phdr->rec_type == REC_TYPE_PACKET) {
if (!map_phdr_interface_id(phdr, in_file)) {
status = MERGE_ERR_BAD_PHDR_INTERFACE_ID;
break;
}
}
}
if (!wtap_dump(pdh, phdr, wtap_buf_ptr(in_file->wth), err, err_info)) {
status = MERGE_ERR_CANT_WRITE_OUTFILE;
break;
}
}
if (cb)
cb->callback_func(MERGE_EVENT_DONE, count, in_files, in_file_count, cb->data);
merge_close_in_files(in_file_count, in_files);
if (status == MERGE_OK || status == MERGE_USER_ABORTED) {
if (!wtap_dump_close(pdh, err))
status = MERGE_ERR_CANT_CLOSE_OUTFILE;
} else {
/*
* We already got some error; no need to report another error on
* close.
*
* Don't overwrite the earlier error.
*/
int close_err = 0;
(void)wtap_dump_close(pdh, &close_err);
}
if (status == MERGE_OK || in_file == NULL) {
*err_fileno = 0;
*err_framenum = 0;
} else {
*err_fileno = (guint)(in_file - in_files);
*err_framenum = in_file->packet_num;
}
return status;
}
/*
* Merges the files to an output file whose name is supplied as an argument,
* based on given input, and invokes callback during execution. Returns
* MERGE_OK on success, or a MERGE_ERR_XXX on failure.
*/
merge_result
merge_files(const gchar* out_filename, const int file_type,
const char *const *in_filenames, const guint in_file_count,
const gboolean do_append, const idb_merge_mode mode,
guint snaplen, const gchar *app_name, merge_progress_callback_t* cb,
int *err, gchar **err_info, guint *err_fileno,
guint32 *err_framenum)
{
merge_in_file_t *in_files = NULL;
int frame_type = WTAP_ENCAP_PER_PACKET;
merge_result status = MERGE_OK;
wtap_dumper *pdh;
GArray *shb_hdrs = NULL;
wtapng_iface_descriptions_t *idb_inf = NULL;
g_assert(out_filename != NULL);
g_assert(in_file_count > 0);
g_assert(in_filenames != NULL);
g_assert(err != NULL);
g_assert(err_info != NULL);
g_assert(err_fileno != NULL);
g_assert(err_framenum != NULL);
/* if a callback was given, it has to have a callback function ptr */
g_assert((cb != NULL) ? (cb->callback_func != NULL) : TRUE);
merge_debug("merge_files: begin");
/* open the input files */
if (!merge_open_in_files(in_file_count, in_filenames, &in_files, cb,
err, err_info, err_fileno)) {
merge_debug("merge_files: merge_open_in_files() failed with err=%d", *err);
*err_framenum = 0;
return MERGE_ERR_CANT_OPEN_INFILE;
}
if (snaplen == 0) {
/* Snapshot length not specified - default to the maximum. */
snaplen = WTAP_MAX_PACKET_SIZE_STANDARD;
}
/*
* This doesn't tell us that much. It tells us what to set the outfile's
* encap type to, but that's all - for example, it does *not* tells us
* whether the input files had the same number of IDBs, for the same exact
* interfaces, and only one IDB each, so it doesn't actually tell us
* whether we can merge IDBs into one or not.
*/
frame_type = merge_select_frame_type(in_file_count, in_files);
merge_debug("merge_files: got frame_type=%d", frame_type);
if (cb)
cb->callback_func(MERGE_EVENT_FRAME_TYPE_SELECTED, frame_type, in_files, in_file_count, cb->data);
/* prepare the outfile */
if (file_type == WTAP_FILE_TYPE_SUBTYPE_PCAPNG) {
shb_hdrs = create_shb_header(in_files, in_file_count, app_name);
merge_debug("merge_files: SHB created");
idb_inf = generate_merged_idb(in_files, in_file_count, mode);
merge_debug("merge_files: IDB merge operation complete, got %u IDBs", idb_inf ? idb_inf->interface_data->len : 0);
pdh = wtap_dump_open_ng(out_filename, file_type, frame_type, snaplen,
FALSE /* compressed */, shb_hdrs, idb_inf,
NULL, err);
}
else {
pdh = wtap_dump_open(out_filename, file_type, frame_type, snaplen,
FALSE /* compressed */, err);
}
if (pdh == NULL) {
merge_close_in_files(in_file_count, in_files);
g_free(in_files);
wtap_block_array_free(shb_hdrs);
wtap_free_idb_info(idb_inf);
*err_framenum = 0;
return MERGE_ERR_CANT_OPEN_OUTFILE;
}
if (cb)
cb->callback_func(MERGE_EVENT_READY_TO_MERGE, 0, in_files, in_file_count, cb->data);
status = merge_process_packets(pdh, file_type, in_files, in_file_count,
do_append, snaplen, cb, err, err_info,
err_fileno, err_framenum);
g_free(in_files);
wtap_block_array_free(shb_hdrs);
wtap_free_idb_info(idb_inf);
return status;
}
int
main(int argc, char *argv[])
{
GString *comp_info_str;
GString *runtime_info_str;
int opt;
DIAG_OFF(cast-qual)
static const struct option long_options[] = {
{(char *)"help", no_argument, NULL, 'h'},
{(char *)"version", no_argument, NULL, 'V'},
{0, 0, 0, 0 }
};
DIAG_ON(cast-qual)
gboolean do_append = FALSE;
gboolean verbose = FALSE;
int in_file_count = 0;
guint snaplen = 0;
#ifdef PCAP_NG_DEFAULT
int file_type = WTAP_FILE_TYPE_SUBTYPE_PCAPNG; /* default to pcap format */
#else
int file_type = WTAP_FILE_TYPE_SUBTYPE_PCAP; /* default to pcapng format */
#endif
int frame_type = -2;
int out_fd;
merge_in_file_t *in_files = NULL, *in_file;
int i;
struct wtap_pkthdr *phdr, snap_phdr;
wtap_dumper *pdh;
int open_err, read_err = 0, write_err, close_err;
gchar *err_info, *write_err_info = NULL;
int err_fileno;
char *out_filename = NULL;
gboolean got_read_error = FALSE, got_write_error = FALSE;
int count;
cmdarg_err_init(mergecap_cmdarg_err, mergecap_cmdarg_err_cont);
#ifdef _WIN32
arg_list_utf_16to8(argc, argv);
create_app_running_mutex();
#endif /* _WIN32 */
/* Get the compile-time version information string */
comp_info_str = get_compiled_version_info(NULL, get_mergecap_compiled_info);
/* Get the run-time version information string */
runtime_info_str = get_runtime_version_info(get_mergecap_runtime_info);
/* Add it to the information to be reported on a crash. */
ws_add_crash_info("Mergecap (Wireshark) %s\n"
"\n"
"%s"
"\n"
"%s",
get_ws_vcs_version_info(), comp_info_str->str, runtime_info_str->str);
/* Process the options first */
while ((opt = getopt_long(argc, argv, "aF:hs:T:vVw:", long_options, NULL)) != -1) {
switch (opt) {
case 'a':
do_append = !do_append;
break;
case 'F':
file_type = wtap_short_string_to_file_type_subtype(optarg);
if (file_type < 0) {
fprintf(stderr, "mergecap: \"%s\" isn't a valid capture file type\n",
optarg);
list_capture_types();
exit(1);
}
break;
case 'h':
printf("Mergecap (Wireshark) %s\n"
"Merge two or more capture files into one.\n"
"See http://www.wireshark.org for more information.\n",
get_ws_vcs_version_info());
print_usage(stdout);
exit(0);
break;
case 's':
snaplen = get_positive_int(optarg, "snapshot length");
break;
case 'T':
frame_type = wtap_short_string_to_encap(optarg);
if (frame_type < 0) {
fprintf(stderr, "mergecap: \"%s\" isn't a valid encapsulation type\n",
optarg);
list_encap_types();
exit(1);
}
break;
case 'v':
verbose = TRUE;
break;
case 'V':
show_version("Mergecap (Wireshark)", comp_info_str, runtime_info_str);
g_string_free(comp_info_str, TRUE);
g_string_free(runtime_info_str, TRUE);
exit(0);
break;
case 'w':
out_filename = optarg;
break;
case '?': /* Bad options if GNU getopt */
switch(optopt) {
case'F':
list_capture_types();
break;
case'T':
list_encap_types();
break;
default:
print_usage(stderr);
}
exit(1);
break;
}
}
/* check for proper args; at a minimum, must have an output
* filename and one input file
*/
in_file_count = argc - optind;
if (!out_filename) {
fprintf(stderr, "mergecap: an output filename must be set with -w\n");
fprintf(stderr, " run with -h for help\n");
return 1;
}
if (in_file_count < 1) {
fprintf(stderr, "mergecap: No input files were specified\n");
return 1;
}
/* open the input files */
if (!merge_open_in_files(in_file_count, &argv[optind], &in_files,
&open_err, &err_info, &err_fileno)) {
fprintf(stderr, "mergecap: Can't open %s: %s\n", argv[optind + err_fileno],
wtap_strerror(open_err));
if (err_info != NULL) {
fprintf(stderr, "(%s)\n", err_info);
g_free(err_info);
}
return 2;
}
if (verbose) {
for (i = 0; i < in_file_count; i++)
fprintf(stderr, "mergecap: %s is type %s.\n", argv[optind + i],
wtap_file_type_subtype_string(wtap_file_type_subtype(in_files[i].wth)));
}
if (snaplen == 0) {
/*
* Snapshot length not specified - default to the maximum of the
* snapshot lengths of the input files.
*/
snaplen = merge_max_snapshot_length(in_file_count, in_files);
}
/* set the outfile frame type */
if (frame_type == -2) {
/*
* Default to the appropriate frame type for the input files.
*/
frame_type = merge_select_frame_type(in_file_count, in_files);
if (verbose) {
if (frame_type == WTAP_ENCAP_PER_PACKET) {
/*
* Find out why we had to choose WTAP_ENCAP_PER_PACKET.
*/
int first_frame_type, this_frame_type;
first_frame_type = wtap_file_encap(in_files[0].wth);
for (i = 1; i < in_file_count; i++) {
this_frame_type = wtap_file_encap(in_files[i].wth);
if (first_frame_type != this_frame_type) {
fprintf(stderr, "mergecap: multiple frame encapsulation types detected\n");
fprintf(stderr, " defaulting to WTAP_ENCAP_PER_PACKET\n");
fprintf(stderr, " %s had type %s (%s)\n",
in_files[0].filename,
wtap_encap_string(first_frame_type),
wtap_encap_short_string(first_frame_type));
fprintf(stderr, " %s had type %s (%s)\n",
in_files[i].filename,
wtap_encap_string(this_frame_type),
wtap_encap_short_string(this_frame_type));
break;
}
}
}
fprintf(stderr, "mergecap: selected frame_type %s (%s)\n",
wtap_encap_string(frame_type),
wtap_encap_short_string(frame_type));
}
}
/* open the outfile */
if (strncmp(out_filename, "-", 2) == 0) {
/* use stdout as the outfile */
out_fd = 1 /*stdout*/;
} else {
/* open the outfile */
out_fd = ws_open(out_filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
if (out_fd == -1) {
fprintf(stderr, "mergecap: Couldn't open output file %s: %s\n",
out_filename, g_strerror(errno));
exit(1);
}
}
/* prepare the outfile */
if(file_type == WTAP_FILE_TYPE_SUBTYPE_PCAPNG ){
wtapng_section_t *shb_hdr;
GString *comment_gstr;
shb_hdr = g_new(wtapng_section_t,1);
comment_gstr = g_string_new("File created by merging: \n");
for (i = 0; i < in_file_count; i++) {
g_string_append_printf(comment_gstr, "File%d: %s \n",i+1,in_files[i].filename);
}
shb_hdr->section_length = -1;
/* options */
shb_hdr->opt_comment = comment_gstr->str; /* NULL if not available */
shb_hdr->shb_hardware = NULL; /* NULL if not available, UTF-8 string containing the description of the hardware used to create this section. */
shb_hdr->shb_os = NULL; /* NULL if not available, UTF-8 string containing the name of the operating system used to create this section. */
shb_hdr->shb_user_appl = g_strdup("mergecap"); /* NULL if not available, UTF-8 string containing the name of the application used to create this section. */
pdh = wtap_dump_fdopen_ng(out_fd, file_type, frame_type, snaplen,
FALSE /* compressed */, shb_hdr, NULL /* wtapng_iface_descriptions_t *idb_inf */, &open_err);
g_string_free(comment_gstr, TRUE);
} else {
pdh = wtap_dump_fdopen(out_fd, file_type, frame_type, snaplen, FALSE /* compressed */, &open_err);
}
if (pdh == NULL) {
merge_close_in_files(in_file_count, in_files);
g_free(in_files);
fprintf(stderr, "mergecap: Can't open or create %s: %s\n", out_filename,
wtap_strerror(open_err));
exit(1);
}
/* do the merge (or append) */
count = 1;
for (;;) {
if (do_append)
in_file = merge_append_read_packet(in_file_count, in_files, &read_err,
&err_info);
else
in_file = merge_read_packet(in_file_count, in_files, &read_err,
&err_info);
if (in_file == NULL) {
/* EOF */
break;
}
if (read_err != 0) {
/* I/O error reading from in_file */
got_read_error = TRUE;
break;
}
if (verbose)
fprintf(stderr, "Record: %d\n", count++);
/* We simply write it, perhaps after truncating it; we could do other
* things, like modify it. */
phdr = wtap_phdr(in_file->wth);
if (snaplen != 0 && phdr->caplen > snaplen) {
snap_phdr = *phdr;
snap_phdr.caplen = snaplen;
phdr = &snap_phdr;
}
if (!wtap_dump(pdh, phdr, wtap_buf_ptr(in_file->wth), &write_err, &write_err_info)) {
got_write_error = TRUE;
break;
}
}
merge_close_in_files(in_file_count, in_files);
if (!got_write_error) {
if (!wtap_dump_close(pdh, &write_err))
got_write_error = TRUE;
} else {
/*
* We already got a write error; no need to report another
* write error on close.
*
* Don't overwrite the earlier write error.
*/
(void)wtap_dump_close(pdh, &close_err);
}
if (got_read_error) {
/*
* Find the file on which we got the error, and report the error.
*/
for (i = 0; i < in_file_count; i++) {
if (in_files[i].state == GOT_ERROR) {
fprintf(stderr, "mergecap: Error reading %s: %s\n",
in_files[i].filename, wtap_strerror(read_err));
if (err_info != NULL) {
fprintf(stderr, "(%s)\n", err_info);
g_free(err_info);
}
}
}
}
if (got_write_error) {
switch (write_err) {
case WTAP_ERR_UNWRITABLE_ENCAP:
/*
* This is a problem with the particular frame we're writing and
* the file type and subtype we're wwriting; note that, and
* report the frame number and file type/subtype.
*/
fprintf(stderr, "mergecap: Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
in_file ? in_file->packet_num : 0, in_file ? in_file->filename : "UNKNOWN",
wtap_file_type_subtype_string(file_type));
break;
case WTAP_ERR_PACKET_TOO_LARGE:
/*
* This is a problem with the particular frame we're writing and
* the file type and subtype we're wwriting; note that, and
* report the frame number and file type/subtype.
*/
fprintf(stderr, "mergecap: Frame %u of \"%s\" is too large for a \"%s\" file.\n",
in_file ? in_file->packet_num : 0, in_file ? in_file->filename : "UNKNOWN",
wtap_file_type_subtype_string(file_type));
break;
case WTAP_ERR_UNWRITABLE_REC_TYPE:
/*
* This is a problem with the particular record we're writing and
* the file type and subtype we're wwriting; note that, and
* report the record number and file type/subtype.
*/
fprintf(stderr, "mergecap: Record %u of \"%s\" has a record type that can't be saved in a \"%s\" file.\n",
in_file ? in_file->packet_num : 0, in_file ? in_file->filename : "UNKNOWN",
wtap_file_type_subtype_string(file_type));
break;
case WTAP_ERR_UNWRITABLE_REC_DATA:
/*
* This is a problem with the particular record we're writing and
* the file type and subtype we're wwriting; note that, and
* report the record number and file type/subtype.
*/
fprintf(stderr, "mergecap: Record %u of \"%s\" has data that can't be saved in a \"%s\" file.\n(%s)\n",
in_file ? in_file->packet_num : 0, in_file ? in_file->filename : "UNKNOWN",
wtap_file_type_subtype_string(file_type),
write_err_info != NULL ? write_err_info : "no information supplied");
g_free(write_err_info);
break;
default:
fprintf(stderr, "mergecap: Error writing to outfile: %s\n",
wtap_strerror(write_err));
break;
}
}
g_free(in_files);
return (!got_read_error && !got_write_error) ? 0 : 2;
}
