/* XXX - We parse simple text output to get our interface list. Should
* we use "real" data serialization instead, e.g. via XML? */
if_capabilities_t *
capture_get_if_capabilities(const gchar *ifname, gboolean monitor_mode,
const gchar *auth_string,
char **err_str, void (*update_cb)(void))
{
if_capabilities_t *caps;
GList *linktype_list = NULL, *timestamp_list = NULL;
int err, i;
gchar *data, *primary_msg, *secondary_msg;
gchar **raw_list;
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface Capabilities ...");
#ifdef HAVE_EXTCAP
/* see if the interface is from extcap */
caps = extcap_get_if_dlts(ifname, err_str);
if (caps != NULL)
return caps;
/* return if the extcap interface generated an error */
if (err_str != NULL && *err_str != NULL)
return NULL;
#endif /* HAVE_EXTCAP */
/* Try to get our interface list */
err = sync_if_capabilities_open(ifname, monitor_mode, auth_string, &data,
&primary_msg, &secondary_msg, update_cb);
if (err != 0) {
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface Capabilities failed. Error %d, %s (%s)",
err, primary_msg ? primary_msg : "no message",
secondary_msg ? secondary_msg : "no secondary message");
if (err_str) {
*err_str = primary_msg;
} else {
g_free(primary_msg);
}
g_free(secondary_msg);
return NULL;
}
/* Split our lines */
#ifdef _WIN32
raw_list = g_strsplit(data, "\r\n", 0);
#else
raw_list = g_strsplit(data, "\n", 0);
#endif
g_free(data);
/*
* First line is 0 if monitor mode isn't supported, 1 if it is.
*/
if (raw_list[0] == NULL || *raw_list[0] == '\0') {
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface Capabilities returned no information.");
if (err_str) {
*err_str = g_strdup("Dumpcap returned no interface capability information");
}
g_strfreev(raw_list);
return NULL;
}
/*
* Allocate the interface capabilities structure.
*/
caps = (if_capabilities_t *)g_malloc(sizeof *caps);
switch (*raw_list[0]) {
case '0':
caps->can_set_rfmon = FALSE;
break;
case '1':
caps->can_set_rfmon = TRUE;
break;
default:
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface Capabilities returned bad information.");
if (err_str) {
*err_str = g_strdup_printf("Dumpcap returned \"%s\" for monitor-mode capability",
raw_list[0]);
}
g_free(caps);
g_strfreev(raw_list);
return NULL;
}
/*
* The following are link-layer types.
*/
for (i = 1; raw_list[i] != NULL && *raw_list[i] != '\0'; i++) {
data_link_info_t *data_link_info;
/* ...and what if the interface name has a tab in it, Mr. Clever Programmer? */
char **lt_parts = g_strsplit(raw_list[i], "\t", 3);
if (lt_parts[0] == NULL || lt_parts[1] == NULL || lt_parts[2] == NULL) {
g_strfreev(lt_parts);
continue;
}
data_link_info = g_new(data_link_info_t,1);
data_link_info->dlt = (int) strtol(lt_parts[0], NULL, 10);
data_link_info->name = g_strdup(lt_parts[1]);
if (strcmp(lt_parts[2], "(not supported)") != 0)
data_link_info->description = g_strdup(lt_parts[2]);
else
data_link_info->description = NULL;
g_strfreev(lt_parts);
linktype_list = g_list_append(linktype_list, data_link_info);
}
if (raw_list[i]) { /* Oh, timestamp types! */
for (i++; raw_list[i] != NULL && *raw_list[i] != '\0'; i++) {
timestamp_info_t *timestamp_info;
char **tt_parts = g_strsplit(raw_list[i], "\t", 2);
if (tt_parts[0] == NULL || tt_parts[1] == NULL) {
g_strfreev(tt_parts);
continue;
}
timestamp_info = g_new(timestamp_info_t,1);
timestamp_info->name = g_strdup(tt_parts[0]);
timestamp_info->description = g_strdup(tt_parts[1]);
g_strfreev(tt_parts);
timestamp_list = g_list_append(timestamp_list, timestamp_info);
}
}
g_strfreev(raw_list);
/* Check to see if we built a list */
if (linktype_list == NULL) {
/* No. */
if (err_str)
*err_str = g_strdup("Dumpcap returned no link-layer types");
g_free(caps);
return NULL;
}
caps->data_link_types = linktype_list;
/* Might be NULL. Not all systems report timestamp types */
caps->timestamp_types = timestamp_list;
return caps;
}
/* XXX - We parse simple text output to get our interface list. Should
* we use "real" data serialization instead, e.g. via XML? */
if_capabilities_t *
capture_get_if_capabilities(const gchar *ifname, gboolean monitor_mode,
char **err_str)
{
if_capabilities_t *caps;
GList *linktype_list = NULL;
int err, i;
gchar *data, *primary_msg, *secondary_msg;
gchar **raw_list, **lt_parts;
data_link_info_t *data_link_info;
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface Capabilities ...");
/* Try to get our interface list */
err = sync_if_capabilities_open(ifname, monitor_mode, &data,
&primary_msg, &secondary_msg);
if (err != 0) {
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface Capabilities failed!");
if (err_str) {
*err_str = primary_msg;
} else {
g_free(primary_msg);
}
g_free(secondary_msg);
return NULL;
}
/* Split our lines */
#ifdef _WIN32
raw_list = g_strsplit(data, "\r\n", 0);
#else
raw_list = g_strsplit(data, "\n", 0);
#endif
g_free(data);
/*
* First line is 0 if monitor mode isn't supported, 1 if it is.
*/
if (raw_list[0] == NULL || *raw_list[0] == '\0') {
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface Capabilities returned no information!");
if (err_str) {
*err_str = g_strdup("Dumpcap returned no interface capability information");
}
return NULL;
}
/*
* Allocate the interface capabilities structure.
*/
caps = g_malloc(sizeof *caps);
switch (*raw_list[0]) {
case '0':
caps->can_set_rfmon = FALSE;
break;
case '1':
caps->can_set_rfmon = TRUE;
break;
default:
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_MESSAGE, "Capture Interface Capabilities returned bad information!");
if (err_str) {
*err_str = g_strdup_printf("Dumpcap returned \"%s\" for monitor-mode capability",
raw_list[0]);
}
g_free(caps);
return NULL;
}
/*
* The rest are link-layer types.
*/
for (i = 1; raw_list[i] != NULL; i++) {
/* ...and what if the interface name has a tab in it, Mr. Clever Programmer? */
lt_parts = g_strsplit(raw_list[i], "\t", 3);
if (lt_parts[0] == NULL || lt_parts[1] == NULL || lt_parts[2] == NULL) {
g_strfreev(lt_parts);
continue;
}
data_link_info = g_malloc(sizeof (data_link_info_t));
data_link_info->dlt = (int) strtol(lt_parts[0], NULL, 10);
data_link_info->name = g_strdup(lt_parts[1]);
if (strcmp(lt_parts[2], "(not supported)") != 0)
data_link_info->description = g_strdup(lt_parts[2]);
else
data_link_info->description = NULL;
linktype_list = g_list_append(linktype_list, data_link_info);
}
g_strfreev(raw_list);
/* Check to see if we built a list */
if (linktype_list == NULL) {
/* No. */
if (err_str)
*err_str = g_strdup("Dumpcap returned no link-layer types");
g_free(caps);
return NULL;
}
caps->data_link_types = linktype_list;
return caps;
}
