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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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>
*/
#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;
}
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