[PATCH v4 1/6] plugins/udevng: Add support for PCIe MBIM modems * Parses through the sysfs tree and detects MBIM control nodes, net and AT nodes

---
 plugins/udevng.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)

diff --git a/plugins/udevng.c b/plugins/udevng.c
index b8df66de..09c916db 100644
--- a/plugins/udevng.c
+++ b/plugins/udevng.c
@@ -1176,7 +1176,13 @@ static gboolean setup_mbim(struct modem_info *modem)
 {
 	const char *ctl = NULL, *net = NULL, *atcmd = NULL;
 	GSList *list;
+	const char *sub_subsystem = NULL, *type = NULL;
+	char path[512], wwan_path[1024], sub_path[2048];
 	char descriptors[PATH_MAX];
+	struct udev *new_udev;
+	struct udev_device *wwan_device, *sub_device;
+	struct dirent *dir = NULL, *subdir = NULL;
+	DIR *d = NULL, *sd = NULL;
 
 	DBG("%s [%s:%s]", modem->syspath, modem->vendor, modem->model);
 
@@ -1196,6 +1202,56 @@ static gboolean setup_mbim(struct modem_info *modem)
 		else if (g_strcmp0(subsystem, "tty") == 0) {
 			if (g_strcmp0(info->number, "02") == 0)
 				atcmd = info->devnode;
+		} else if (g_strcmp0(subsystem, "pci") == 0) {
+			sprintf(path, "%s/wwan", udev_device_get_syspath(info->udev_device));
+
+			d = opendir(path);
+			if (!d)
+				return FALSE;
+
+			new_udev = udev_new();
+
+			while ((dir = readdir(d))) {
+				if (g_strcmp0(dir->d_name, ".") == 0 ||
+					g_strcmp0(dir->d_name, "..") == 0)
+					continue;
+
+				sprintf(wwan_path, "%s/%s", path, dir->d_name);
+
+				wwan_device = udev_device_new_from_syspath(new_udev,
+									wwan_path);
+				net = udev_device_get_sysname(wwan_device);
+
+				// Parse all the subdirectories now
+				sd = opendir(wwan_path);
+				while ((subdir = readdir(sd))) {
+					if (subdir->d_type != DT_DIR)
+						continue;
+
+					if (g_strcmp0(subdir->d_name, ".") == 0 ||
+						g_strcmp0(subdir->d_name, "..") == 0)
+						continue;
+
+					sprintf(sub_path, "%s/%s", wwan_path, subdir->d_name);
+
+					sub_device = udev_device_new_from_syspath(new_udev,
+										sub_path);
+					sub_subsystem = udev_device_get_subsystem(sub_device);
+
+					if (g_strcmp0(sub_subsystem, "wwan") == 0) {
+						type = udev_device_get_sysattr_value(sub_device, "type");
+
+						if (g_strcmp0(type, "MBIM") == 0)
+							ctl = udev_device_get_devnode(sub_device);
+						else if (g_strcmp0(type, "AT") == 0)
+							atcmd = udev_device_get_devnode(sub_device);
+					}
+				}
+				closedir(sd);
+				break;
+			}
+			closedir(d);
+			udev_unref(new_udev);
 		}
 	}
 
-- 
2.49.0