1 files changed, 255 insertions, 0 deletions
diff --git a/tools/usb/usbip/src/usbip_attach.c b/tools/usb/usbip/src/usbip_attach.c
new file mode 100644
index 000000000..ba8872848
--- /dev/null
+++ b/tools/usb/usbip/src/usbip_attach.c
@@ -0,0 +1,255 @@
+/*
+ * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
+ *               2005-2007 Takahiro Hirofuchi
+ * Copyright (C) 2015-2016 Samsung Electronics
+ *               Igor Kotrasinski <i.kotrasinsk@samsung.com>
+ *               Krzysztof Opasiak <k.opasiak@samsung.com>
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <sys/stat.h>
+
+#include <limits.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <fcntl.h>
+#include <getopt.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "vhci_driver.h"
+#include "usbip_common.h"
+#include "usbip_network.h"
+#include "usbip.h"
+
+static const char usbip_attach_usage_string[] =
+	"usbip attach <args>\n"
+	"    -r, --remote=<host>      The machine with exported USB devices\n"
+	"    -b, --busid=<busid>    Busid of the device on <host>\n"
+	"    -d, --device=<devid>    Id of the virtual UDC on <host>\n";
+
+void usbip_attach_usage(void)
+{
+	printf("usage: %s", usbip_attach_usage_string);
+}
+
+#define MAX_BUFF 100
+static int record_connection(char *host, char *port, char *busid, int rhport)
+{
+	int fd;
+	char path[PATH_MAX+1];
+	char buff[MAX_BUFF+1];
+	int ret;
+
+	ret = mkdir(VHCI_STATE_PATH, 0700);
+	if (ret < 0) {
+		/* if VHCI_STATE_PATH exists, then it better be a directory */
+		if (errno == EEXIST) {
+			struct stat s;
+
+			ret = stat(VHCI_STATE_PATH, &s);
+			if (ret < 0)
+				return -1;
+			if (!(s.st_mode & S_IFDIR))
+				return -1;
+		} else
+			return -1;
+	}
+
+	snprintf(path, PATH_MAX, VHCI_STATE_PATH"/port%d", rhport);
+
+	fd = open(path, O_WRONLY|O_CREAT|O_TRUNC, S_IRWXU);
+	if (fd < 0)
+		return -1;
+
+	snprintf(buff, MAX_BUFF, "%s %s %s\n",
+			host, port, busid);
+
+	ret = write(fd, buff, strlen(buff));
+	if (ret != (ssize_t) strlen(buff)) {
+		close(fd);
+		return -1;
+	}
+
+	close(fd);
+
+	return 0;
+}
+
+static int import_device(int sockfd, struct usbip_usb_device *udev)
+{
+	int rc;
+	int port;
+	uint32_t speed = udev->speed;
+
+	rc = usbip_vhci_driver_open();
+	if (rc < 0) {
+		err("open vhci_driver");
+		goto err_out;
+	}
+
+	do {
+		port = usbip_vhci_get_free_port(speed);
+		if (port < 0) {
+			err("no free port");
+			goto err_driver_close;
+		}
+
+		dbg("got free port %d", port);
+
+		rc = usbip_vhci_attach_device(port, sockfd, udev->busnum,
+					      udev->devnum, udev->speed);
+		if (rc < 0 && errno != EBUSY) {
+			err("import device");
+			goto err_driver_close;
+		}
+	} while (rc < 0);
+
+	usbip_vhci_driver_close();
+
+	return port;
+
+err_driver_close:
+	usbip_vhci_driver_close();
+err_out:
+	return -1;
+}
+
+static int query_import_device(int sockfd, char *busid)
+{
+	int rc;
+	struct op_import_request request;
+	struct op_import_reply   reply;
+	uint16_t code = OP_REP_IMPORT;
+	int status;
+
+	memset(&request, 0, sizeof(request));
+	memset(&reply, 0, sizeof(reply));
+
+	/* send a request */
+	rc = usbip_net_send_op_common(sockfd, OP_REQ_IMPORT, 0);
+	if (rc < 0) {
+		err("send op_common");
+		return -1;
+	}
+
+	strncpy(request.busid, busid, SYSFS_BUS_ID_SIZE-1);
+
+	PACK_OP_IMPORT_REQUEST(0, &request);
+
+	rc = usbip_net_send(sockfd, (void *) &request, sizeof(request));
+	if (rc < 0) {
+		err("send op_import_request");
+		return -1;
+	}
+
+	/* receive a reply */
+	rc = usbip_net_recv_op_common(sockfd, &code, &status);
+	if (rc < 0) {
+		err("Attach Request for %s failed - %s\n",
+		    busid, usbip_op_common_status_string(status));
+		return -1;
+	}
+
+	rc = usbip_net_recv(sockfd, (void *) &reply, sizeof(reply));
+	if (rc < 0) {
+		err("recv op_import_reply");
+		return -1;
+	}
+
+	PACK_OP_IMPORT_REPLY(0, &reply);
+
+	/* check the reply */
+	if (strncmp(reply.udev.busid, busid, SYSFS_BUS_ID_SIZE)) {
+		err("recv different busid %s", reply.udev.busid);
+		return -1;
+	}
+
+	/* import a device */
+	return import_device(sockfd, &reply.udev);
+}
+
+static int attach_device(char *host, char *busid)
+{
+	int sockfd;
+	int rc;
+	int rhport;
+
+	sockfd = usbip_net_tcp_connect(host, usbip_port_string);
+	if (sockfd < 0) {
+		err("tcp connect");
+		return -1;
+	}
+
+	rhport = query_import_device(sockfd, busid);
+	if (rhport < 0)
+		return -1;
+
+	close(sockfd);
+
+	rc = record_connection(host, usbip_port_string, busid, rhport);
+	if (rc < 0) {
+		err("record connection");
+		return -1;
+	}
+
+	return 0;
+}
+
+int usbip_attach(int argc, char *argv[])
+{
+	static const struct option opts[] = {
+		{ "remote", required_argument, NULL, 'r' },
+		{ "busid",  required_argument, NULL, 'b' },
+		{ "device",  required_argument, NULL, 'd' },
+		{ NULL, 0,  NULL, 0 }
+	};
+	char *host = NULL;
+	char *busid = NULL;
+	int opt;
+	int ret = -1;
+
+	for (;;) {
+		opt = getopt_long(argc, argv, "d:r:b:", opts, NULL);
+
+		if (opt == -1)
+			break;
+
+		switch (opt) {
+		case 'r':
+			host = optarg;
+			break;
+		case 'd':
+		case 'b':
+			busid = optarg;
+			break;
+		default:
+			goto err_out;
+		}
+	}
+
+	if (!host || !busid)
+		goto err_out;
+
+	ret = attach_device(host, busid);
+	goto out;
+
+err_out:
+	usbip_attach_usage();
+out:
+	return ret;
+}