/**
* Parse a link-type argument of the form "encap:<pcap dlt>" or
* "proto:<proto name>". "Pcap dlt" must be a name conforming to
* pcap_datalink_name_to_val() or an integer. "Proto name" must be
* a protocol name, e.g. "http".
*/
static gboolean
set_link_type(const char *lt_arg) {
char *spec_ptr = strchr(lt_arg, ':');
char *p;
int dlt_val;
long val;
dissector_handle_t dhandle;
GString *pref_str;
if (!spec_ptr)
return FALSE;
spec_ptr++;
if (strncmp(lt_arg, "encap:", strlen("encap:")) == 0) {
dlt_val = linktype_name_to_val(spec_ptr);
if (dlt_val == -1) {
errno = 0;
val = strtol(spec_ptr, &p, 10);
if (p == spec_ptr || *p != '\0' || errno != 0 || val > INT_MAX) {
return FALSE;
}
dlt_val = (int)val;
}
encap = wtap_pcap_encap_to_wtap_encap(dlt_val);
if (encap == WTAP_ENCAP_UNKNOWN) {
return FALSE;
}
return TRUE;
} else if (strncmp(lt_arg, "proto:", strlen("proto:")) == 0) {
dhandle = find_dissector(spec_ptr);
if (dhandle) {
encap = WTAP_ENCAP_USER0;
pref_str = g_string_new("uat:user_dlts:");
/* This must match the format used in the user_dlts file */
g_string_append_printf(pref_str,
"\"User 0 (DLT=147)\",\"%s\",\"0\",\"\",\"0\",\"\"",
spec_ptr);
if (prefs_set_pref(pref_str->str) != PREFS_SET_OK) {
g_string_free(pref_str, TRUE);
return FALSE;
}
g_string_free(pref_str, TRUE);
return TRUE;
}
}
return FALSE;
}
int
capture_opts_add_opt(capture_options *capture_opts, int opt, const char *optarg_str_p, gboolean *start_capture)
{
int status, snaplen;
switch(opt) {
case 'a': /* autostop criteria */
if (set_autostop_criterion(capture_opts, optarg_str_p) == FALSE) {
cmdarg_err("Invalid or unknown -a flag \"%s\"", optarg_str_p);
return 1;
}
break;
#ifdef HAVE_PCAP_REMOTE
case 'A':
if (get_auth_arguments(capture_opts, optarg_str_p) == FALSE) {
cmdarg_err("Invalid or unknown -A arg \"%s\"", optarg_str_p);
return 1;
}
break;
#endif
case 'b': /* Ringbuffer option */
capture_opts->multi_files_on = TRUE;
if (get_ring_arguments(capture_opts, optarg_str_p) == FALSE) {
cmdarg_err("Invalid or unknown -b arg \"%s\"", optarg_str_p);
return 1;
}
break;
#if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
case 'B': /* Buffer size */
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
interface_opts.buffer_size = get_positive_int(optarg_str_p, "buffer size");
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.buffer_size = get_positive_int(optarg_str_p, "buffer size");
}
break;
#endif
case 'c': /* Capture n packets */
capture_opts->has_autostop_packets = TRUE;
capture_opts->autostop_packets = get_positive_int(optarg_str_p, "packet count");
break;
case 'f': /* capture filter */
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
g_free(interface_opts.cfilter);
interface_opts.cfilter = g_strdup(optarg_str_p);
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
g_free(capture_opts->default_options.cfilter);
capture_opts->default_options.cfilter = g_strdup(optarg_str_p);
}
break;
case 'H': /* Hide capture info dialog box */
capture_opts->show_info = FALSE;
break;
case 'i': /* Use interface x */
status = capture_opts_add_iface_opt(capture_opts, optarg_str_p);
if (status != 0) {
return status;
}
break;
#ifdef HAVE_PCAP_CREATE
case 'I': /* Capture in monitor mode */
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
interface_opts.monitor_mode = TRUE;
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.monitor_mode = TRUE;
}
break;
#endif
case 'k': /* Start capture immediately */
*start_capture = TRUE;
break;
/*case 'l':*/ /* Automatic scrolling in live capture mode */
#ifdef HAVE_PCAP_SETSAMPLING
case 'm':
if (get_sampling_arguments(capture_opts, optarg_str_p) == FALSE) {
cmdarg_err("Invalid or unknown -m arg \"%s\"", optarg_str_p);
return 1;
}
break;
#endif
case 'n': /* Use pcapng format */
capture_opts->use_pcapng = TRUE;
break;
case 'p': /* Don't capture in promiscuous mode */
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
interface_opts.promisc_mode = FALSE;
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.promisc_mode = FALSE;
}
break;
case 'P': /* Use pcap format */
capture_opts->use_pcapng = FALSE;
break;
#ifdef HAVE_PCAP_REMOTE
case 'r':
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
interface_opts.nocap_rpcap = FALSE;
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.nocap_rpcap = FALSE;
}
break;
#endif
case 's': /* Set the snapshot (capture) length */
snaplen = get_natural_int(optarg_str_p, "snapshot length");
/*
* Make a snapshot length of 0 equivalent to the maximum packet
* length, mirroring what tcpdump does.
*/
if (snaplen == 0)
snaplen = WTAP_MAX_PACKET_SIZE;
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
interface_opts.has_snaplen = TRUE;
interface_opts.snaplen = snaplen;
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.snaplen = snaplen;
capture_opts->default_options.has_snaplen = TRUE;
}
break;
case 'S': /* "Real-Time" mode: used for following file ala tail -f */
capture_opts->real_time_mode = TRUE;
break;
#ifdef HAVE_PCAP_REMOTE
case 'u':
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
interface_opts.datatx_udp = TRUE;
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.datatx_udp = TRUE;
}
break;
#endif
case 'w': /* Write to capture file x */
capture_opts->saving_to_file = TRUE;
g_free(capture_opts->save_file);
capture_opts->save_file = g_strdup(optarg_str_p);
status = capture_opts_output_to_pipe(capture_opts->save_file, &capture_opts->output_to_pipe);
return status;
case 'g': /* enable group read access on the capture file(s) */
capture_opts->group_read_access = TRUE;
break;
case 'y': /* Set the pcap data link type */
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
interface_opts.linktype = linktype_name_to_val(optarg_str_p);
if (interface_opts.linktype == -1) {
cmdarg_err("The specified data link type \"%s\" isn't valid",
optarg_str_p);
return 1;
}
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.linktype = linktype_name_to_val(optarg_str_p);
if (capture_opts->default_options.linktype == -1) {
cmdarg_err("The specified data link type \"%s\" isn't valid",
optarg_str_p);
return 1;
}
}
break;
default:
/* the caller is responsible to send us only the right opt's */
g_assert_not_reached();
}
return 0;
}
int
capture_opts_add_opt(capture_options *capture_opts, int opt, const char *optarg_str_p, gboolean *start_capture)
{
int status;
switch(opt) {
case 'a': /* autostop criteria */
if (set_autostop_criterion(capture_opts, optarg_str_p) == FALSE) {
cmdarg_err("Invalid or unknown -a flag \"%s\"", optarg_str_p);
return 1;
}
break;
#ifdef HAVE_PCAP_REMOTE
case 'A':
if (get_auth_arguments(capture_opts, optarg_str_p) == FALSE) {
cmdarg_err("Invalid or unknown -A arg \"%s\"", optarg_str_p);
return 1;
}
break;
#endif
case 'b': /* Ringbuffer option */
capture_opts->multi_files_on = TRUE;
if (get_ring_arguments(capture_opts, optarg_str_p) == FALSE) {
cmdarg_err("Invalid or unknown -b arg \"%s\"", optarg_str_p);
return 1;
}
break;
#if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
case 'B': /* Buffer size */
capture_opts->buffer_size = get_positive_int(optarg_str_p, "buffer size");
break;
#endif
case 'c': /* Capture n packets */
capture_opts->has_autostop_packets = TRUE;
capture_opts->autostop_packets = get_positive_int(optarg_str_p, "packet count");
break;
case 'f': /* capture filter */
if (capture_opts->has_cfilter) {
cmdarg_err("More than one -f argument specified");
return 1;
}
capture_opts->has_cfilter = TRUE;
g_free(capture_opts->cfilter);
capture_opts->cfilter = g_strdup(optarg_str_p);
break;
case 'H': /* Hide capture info dialog box */
capture_opts->show_info = FALSE;
break;
case 'i': /* Use interface x */
status = capture_opts_add_iface_opt(capture_opts, optarg_str_p);
if(status != 0) {
return status;
}
break;
#ifdef HAVE_PCAP_CREATE
case 'I': /* Capture in monitor mode */
capture_opts->monitor_mode = TRUE;
break;
#endif
case 'k': /* Start capture immediately */
*start_capture = TRUE;
break;
/*case 'l':*/ /* Automatic scrolling in live capture mode */
#ifdef HAVE_PCAP_SETSAMPLING
case 'm':
if (get_sampling_arguments(capture_opts, optarg_str_p) == FALSE) {
cmdarg_err("Invalid or unknown -m arg \"%s\"", optarg_str_p);
return 1;
}
break;
#endif
case 'n': /* Use pcapng format */
capture_opts->use_pcapng = TRUE;
break;
case 'p': /* Don't capture in promiscuous mode */
capture_opts->promisc_mode = FALSE;
break;
case 'Q': /* Quit after capture (just capture to file) */
capture_opts->quit_after_cap = TRUE;
*start_capture = TRUE; /*** -Q implies -k !! ***/
break;
#ifdef HAVE_PCAP_REMOTE
case 'r':
capture_opts->nocap_rpcap = FALSE;
break;
#endif
case 's': /* Set the snapshot (capture) length */
capture_opts->has_snaplen = TRUE;
capture_opts->snaplen = get_natural_int(optarg_str_p, "snapshot length");
/*
* Make a snapshot length of 0 equivalent to the maximum packet
* length, mirroring what tcpdump does.
*/
if (capture_opts->snaplen == 0)
capture_opts->snaplen = WTAP_MAX_PACKET_SIZE;
break;
case 'S': /* "Real-Time" mode: used for following file ala tail -f */
capture_opts->real_time_mode = TRUE;
break;
#ifdef HAVE_PCAP_REMOTE
case 'u':
capture_opts->datatx_udp = TRUE;
break;
#endif
case 'w': /* Write to capture file x */
capture_opts->saving_to_file = TRUE;
g_free(capture_opts->save_file);
#if defined _WIN32 && GLIB_CHECK_VERSION(2,6,0)
/* since GLib 2.6, we need to convert filenames to utf8 for Win32 */
capture_opts->save_file = g_locale_to_utf8(optarg_str_p, -1, NULL, NULL, NULL);
#else
capture_opts->save_file = g_strdup(optarg_str_p);
#endif
status = capture_opts_output_to_pipe(capture_opts->save_file, &capture_opts->output_to_pipe);
return status;
case 'y': /* Set the pcap data link type */
capture_opts->linktype = linktype_name_to_val(optarg_str_p);
if (capture_opts->linktype == -1) {
cmdarg_err("The specified data link type \"%s\" isn't valid",
optarg_str_p);
return 1;
}
break;
default:
/* the caller is responsible to send us only the right opt's */
g_assert_not_reached();
}
return 0;
}
