Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 686 insertions, 0 deletions

diff --git a/tools/usb/usbip/src/usbipd.c b/tools/usb/usbip/src/usbipd.c
new file mode 100644
index 000000000..48398a78e
--- /dev/null
+++ b/tools/usb/usbip/src/usbipd.c
@@ -0,0 +1,686 @@
+// 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>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "../config.h"
+#endif
+
+#define _GNU_SOURCE
+#include <errno.h>
+#include <unistd.h>
+#include <netdb.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+#ifdef HAVE_LIBWRAP
+#include <tcpd.h>
+#endif
+
+#include <getopt.h>
+#include <signal.h>
+#include <poll.h>
+
+#include "usbip_host_driver.h"
+#include "usbip_host_common.h"
+#include "usbip_device_driver.h"
+#include "usbip_common.h"
+#include "usbip_network.h"
+#include "list.h"
+
+#undef  PROGNAME
+#define PROGNAME "usbipd"
+#define MAXSOCKFD 20
+
+#define MAIN_LOOP_TIMEOUT 10
+
+#define DEFAULT_PID_FILE "/var/run/" PROGNAME ".pid"
+
+static const char usbip_version_string[] = PACKAGE_STRING;
+
+static const char usbipd_help_string[] =
+	"usage: usbipd [options]\n"
+	"\n"
+	"	-4, --ipv4\n"
+	"		Bind to IPv4. Default is both.\n"
+	"\n"
+	"	-6, --ipv6\n"
+	"		Bind to IPv6. Default is both.\n"
+	"\n"
+	"	-e, --device\n"
+	"		Run in device mode.\n"
+	"		Rather than drive an attached device, create\n"
+	"		a virtual UDC to bind gadgets to.\n"
+	"\n"
+	"	-D, --daemon\n"
+	"		Run as a daemon process.\n"
+	"\n"
+	"	-d, --debug\n"
+	"		Print debugging information.\n"
+	"\n"
+	"	-PFILE, --pid FILE\n"
+	"		Write process id to FILE.\n"
+	"		If no FILE specified, use " DEFAULT_PID_FILE "\n"
+	"\n"
+	"	-tPORT, --tcp-port PORT\n"
+	"		Listen on TCP/IP port PORT.\n"
+	"\n"
+	"	-h, --help\n"
+	"		Print this help.\n"
+	"\n"
+	"	-v, --version\n"
+	"		Show version.\n";
+
+static struct usbip_host_driver *driver;
+
+static void usbipd_help(void)
+{
+	printf("%s\n", usbipd_help_string);
+}
+
+static int recv_request_import(int sockfd)
+{
+	struct op_import_request req;
+	struct usbip_exported_device *edev;
+	struct usbip_usb_device pdu_udev;
+	struct list_head *i;
+	int found = 0;
+	int status = ST_OK;
+	int rc;
+
+	memset(&req, 0, sizeof(req));
+
+	rc = usbip_net_recv(sockfd, &req, sizeof(req));
+	if (rc < 0) {
+		dbg("usbip_net_recv failed: import request");
+		return -1;
+	}
+	PACK_OP_IMPORT_REQUEST(0, &req);
+
+	list_for_each(i, &driver->edev_list) {
+		edev = list_entry(i, struct usbip_exported_device, node);
+		if (!strncmp(req.busid, edev->udev.busid, SYSFS_BUS_ID_SIZE)) {
+			info("found requested device: %s", req.busid);
+			found = 1;
+			break;
+		}
+	}
+
+	if (found) {
+		/* should set TCP_NODELAY for usbip */
+		usbip_net_set_nodelay(sockfd);
+
+		/* export device needs a TCP/IP socket descriptor */
+		status = usbip_export_device(edev, sockfd);
+		if (status < 0)
+			status = ST_NA;
+	} else {
+		info("requested device not found: %s", req.busid);
+		status = ST_NODEV;
+	}
+
+	rc = usbip_net_send_op_common(sockfd, OP_REP_IMPORT, status);
+	if (rc < 0) {
+		dbg("usbip_net_send_op_common failed: %#0x", OP_REP_IMPORT);
+		return -1;
+	}
+
+	if (status) {
+		dbg("import request busid %s: failed", req.busid);
+		return -1;
+	}
+
+	memcpy(&pdu_udev, &edev->udev, sizeof(pdu_udev));
+	usbip_net_pack_usb_device(1, &pdu_udev);
+
+	rc = usbip_net_send(sockfd, &pdu_udev, sizeof(pdu_udev));
+	if (rc < 0) {
+		dbg("usbip_net_send failed: devinfo");
+		return -1;
+	}
+
+	dbg("import request busid %s: complete", req.busid);
+
+	return 0;
+}
+
+static int send_reply_devlist(int connfd)
+{
+	struct usbip_exported_device *edev;
+	struct usbip_usb_device pdu_udev;
+	struct usbip_usb_interface pdu_uinf;
+	struct op_devlist_reply reply;
+	struct list_head *j;
+	int rc, i;
+
+	/*
+	 * Exclude devices that are already exported to a client from
+	 * the exportable device list to avoid:
+	 *	- import requests for devices that are exported only to
+	 *	  fail the request.
+	 *	- revealing devices that are imported by a client to
+	 *	  another client.
+	 */
+
+	reply.ndev = 0;
+	/* number of exported devices */
+	list_for_each(j, &driver->edev_list) {
+		edev = list_entry(j, struct usbip_exported_device, node);
+		if (edev->status != SDEV_ST_USED)
+			reply.ndev += 1;
+	}
+	info("exportable devices: %d", reply.ndev);
+
+	rc = usbip_net_send_op_common(connfd, OP_REP_DEVLIST, ST_OK);
+	if (rc < 0) {
+		dbg("usbip_net_send_op_common failed: %#0x", OP_REP_DEVLIST);
+		return -1;
+	}
+	PACK_OP_DEVLIST_REPLY(1, &reply);
+
+	rc = usbip_net_send(connfd, &reply, sizeof(reply));
+	if (rc < 0) {
+		dbg("usbip_net_send failed: %#0x", OP_REP_DEVLIST);
+		return -1;
+	}
+
+	list_for_each(j, &driver->edev_list) {
+		edev = list_entry(j, struct usbip_exported_device, node);
+		if (edev->status == SDEV_ST_USED)
+			continue;
+
+		dump_usb_device(&edev->udev);
+		memcpy(&pdu_udev, &edev->udev, sizeof(pdu_udev));
+		usbip_net_pack_usb_device(1, &pdu_udev);
+
+		rc = usbip_net_send(connfd, &pdu_udev, sizeof(pdu_udev));
+		if (rc < 0) {
+			dbg("usbip_net_send failed: pdu_udev");
+			return -1;
+		}
+
+		for (i = 0; i < edev->udev.bNumInterfaces; i++) {
+			dump_usb_interface(&edev->uinf[i]);
+			memcpy(&pdu_uinf, &edev->uinf[i], sizeof(pdu_uinf));
+			usbip_net_pack_usb_interface(1, &pdu_uinf);
+
+			rc = usbip_net_send(connfd, &pdu_uinf,
+					sizeof(pdu_uinf));
+			if (rc < 0) {
+				err("usbip_net_send failed: pdu_uinf");
+				return -1;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static int recv_request_devlist(int connfd)
+{
+	struct op_devlist_request req;
+	int rc;
+
+	memset(&req, 0, sizeof(req));
+
+	rc = usbip_net_recv(connfd, &req, sizeof(req));
+	if (rc < 0) {
+		dbg("usbip_net_recv failed: devlist request");
+		return -1;
+	}
+
+	rc = send_reply_devlist(connfd);
+	if (rc < 0) {
+		dbg("send_reply_devlist failed");
+		return -1;
+	}
+
+	return 0;
+}
+
+static int recv_pdu(int connfd)
+{
+	uint16_t code = OP_UNSPEC;
+	int ret;
+	int status;
+
+	ret = usbip_net_recv_op_common(connfd, &code, &status);
+	if (ret < 0) {
+		dbg("could not receive opcode: %#0x", code);
+		return -1;
+	}
+
+	ret = usbip_refresh_device_list(driver);
+	if (ret < 0) {
+		dbg("could not refresh device list: %d", ret);
+		return -1;
+	}
+
+	info("received request: %#0x(%d)", code, connfd);
+	switch (code) {
+	case OP_REQ_DEVLIST:
+		ret = recv_request_devlist(connfd);
+		break;
+	case OP_REQ_IMPORT:
+		ret = recv_request_import(connfd);
+		break;
+	case OP_REQ_DEVINFO:
+	case OP_REQ_CRYPKEY:
+	default:
+		err("received an unknown opcode: %#0x", code);
+		ret = -1;
+	}
+
+	if (ret == 0)
+		info("request %#0x(%d): complete", code, connfd);
+	else
+		info("request %#0x(%d): failed", code, connfd);
+
+	return ret;
+}
+
+#ifdef HAVE_LIBWRAP
+static int tcpd_auth(int connfd)
+{
+	struct request_info request;
+	int rc;
+
+	request_init(&request, RQ_DAEMON, PROGNAME, RQ_FILE, connfd, 0);
+	fromhost(&request);
+	rc = hosts_access(&request);
+	if (rc == 0)
+		return -1;
+
+	return 0;
+}
+#endif
+
+static int do_accept(int listenfd)
+{
+	int connfd;
+	struct sockaddr_storage ss;
+	socklen_t len = sizeof(ss);
+	char host[NI_MAXHOST], port[NI_MAXSERV];
+	int rc;
+
+	memset(&ss, 0, sizeof(ss));
+
+	connfd = accept(listenfd, (struct sockaddr *)&ss, &len);
+	if (connfd < 0) {
+		err("failed to accept connection");
+		return -1;
+	}
+
+	rc = getnameinfo((struct sockaddr *)&ss, len, host, sizeof(host),
+			 port, sizeof(port), NI_NUMERICHOST | NI_NUMERICSERV);
+	if (rc)
+		err("getnameinfo: %s", gai_strerror(rc));
+
+#ifdef HAVE_LIBWRAP
+	rc = tcpd_auth(connfd);
+	if (rc < 0) {
+		info("denied access from %s", host);
+		close(connfd);
+		return -1;
+	}
+#endif
+	info("connection from %s:%s", host, port);
+
+	return connfd;
+}
+
+int process_request(int listenfd)
+{
+	pid_t childpid;
+	int connfd;
+
+	connfd = do_accept(listenfd);
+	if (connfd < 0)
+		return -1;
+	childpid = fork();
+	if (childpid == 0) {
+		close(listenfd);
+		recv_pdu(connfd);
+		exit(0);
+	}
+	close(connfd);
+	return 0;
+}
+
+static void addrinfo_to_text(struct addrinfo *ai, char buf[],
+			     const size_t buf_size)
+{
+	char hbuf[NI_MAXHOST];
+	char sbuf[NI_MAXSERV];
+	int rc;
+
+	buf[0] = '\0';
+
+	rc = getnameinfo(ai->ai_addr, ai->ai_addrlen, hbuf, sizeof(hbuf),
+			 sbuf, sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV);
+	if (rc)
+		err("getnameinfo: %s", gai_strerror(rc));
+
+	snprintf(buf, buf_size, "%s:%s", hbuf, sbuf);
+}
+
+static int listen_all_addrinfo(struct addrinfo *ai_head, int sockfdlist[],
+			     int maxsockfd)
+{
+	struct addrinfo *ai;
+	int ret, nsockfd = 0;
+	const size_t ai_buf_size = NI_MAXHOST + NI_MAXSERV + 2;
+	char ai_buf[ai_buf_size];
+
+	for (ai = ai_head; ai && nsockfd < maxsockfd; ai = ai->ai_next) {
+		int sock;
+
+		addrinfo_to_text(ai, ai_buf, ai_buf_size);
+		dbg("opening %s", ai_buf);
+		sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
+		if (sock < 0) {
+			err("socket: %s: %d (%s)",
+			    ai_buf, errno, strerror(errno));
+			continue;
+		}
+
+		usbip_net_set_reuseaddr(sock);
+		usbip_net_set_nodelay(sock);
+		/* We use seperate sockets for IPv4 and IPv6
+		 * (see do_standalone_mode()) */
+		usbip_net_set_v6only(sock);
+
+		ret = bind(sock, ai->ai_addr, ai->ai_addrlen);
+		if (ret < 0) {
+			err("bind: %s: %d (%s)",
+			    ai_buf, errno, strerror(errno));
+			close(sock);
+			continue;
+		}
+
+		ret = listen(sock, SOMAXCONN);
+		if (ret < 0) {
+			err("listen: %s: %d (%s)",
+			    ai_buf, errno, strerror(errno));
+			close(sock);
+			continue;
+		}
+
+		info("listening on %s", ai_buf);
+		sockfdlist[nsockfd++] = sock;
+	}
+
+	return nsockfd;
+}
+
+static struct addrinfo *do_getaddrinfo(char *host, int ai_family)
+{
+	struct addrinfo hints, *ai_head;
+	int rc;
+
+	memset(&hints, 0, sizeof(hints));
+	hints.ai_family   = ai_family;
+	hints.ai_socktype = SOCK_STREAM;
+	hints.ai_flags    = AI_PASSIVE;
+
+	rc = getaddrinfo(host, usbip_port_string, &hints, &ai_head);
+	if (rc) {
+		err("failed to get a network address %s: %s", usbip_port_string,
+		    gai_strerror(rc));
+		return NULL;
+	}
+
+	return ai_head;
+}
+
+static void signal_handler(int i)
+{
+	dbg("received '%s' signal", strsignal(i));
+}
+
+static void set_signal(void)
+{
+	struct sigaction act;
+
+	memset(&act, 0, sizeof(act));
+	act.sa_handler = signal_handler;
+	sigemptyset(&act.sa_mask);
+	sigaction(SIGTERM, &act, NULL);
+	sigaction(SIGINT, &act, NULL);
+	act.sa_handler = SIG_IGN;
+	sigaction(SIGCHLD, &act, NULL);
+}
+
+static const char *pid_file;
+
+static void write_pid_file(void)
+{
+	if (pid_file) {
+		dbg("creating pid file %s", pid_file);
+		FILE *fp;
+
+		fp = fopen(pid_file, "w");
+		if (!fp) {
+			err("pid_file: %s: %d (%s)",
+			    pid_file, errno, strerror(errno));
+			return;
+		}
+		fprintf(fp, "%d\n", getpid());
+		fclose(fp);
+	}
+}
+
+static void remove_pid_file(void)
+{
+	if (pid_file) {
+		dbg("removing pid file %s", pid_file);
+		unlink(pid_file);
+	}
+}
+
+static int do_standalone_mode(int daemonize, int ipv4, int ipv6)
+{
+	struct addrinfo *ai_head;
+	int sockfdlist[MAXSOCKFD];
+	int nsockfd, family;
+	int i, terminate;
+	struct pollfd *fds;
+	struct timespec timeout;
+	sigset_t sigmask;
+
+	if (usbip_driver_open(driver))
+		return -1;
+
+	if (daemonize) {
+		if (daemon(0, 0) < 0) {
+			err("daemonizing failed: %s", strerror(errno));
+			usbip_driver_close(driver);
+			return -1;
+		}
+		umask(0);
+		usbip_use_syslog = 1;
+	}
+	set_signal();
+	write_pid_file();
+
+	info("starting " PROGNAME " (%s)", usbip_version_string);
+
+	/*
+	 * To suppress warnings on systems with bindv6only disabled
+	 * (default), we use seperate sockets for IPv6 and IPv4 and set
+	 * IPV6_V6ONLY on the IPv6 sockets.
+	 */
+	if (ipv4 && ipv6)
+		family = AF_UNSPEC;
+	else if (ipv4)
+		family = AF_INET;
+	else
+		family = AF_INET6;
+
+	ai_head = do_getaddrinfo(NULL, family);
+	if (!ai_head) {
+		usbip_driver_close(driver);
+		return -1;
+	}
+	nsockfd = listen_all_addrinfo(ai_head, sockfdlist,
+		sizeof(sockfdlist) / sizeof(*sockfdlist));
+	freeaddrinfo(ai_head);
+	if (nsockfd <= 0) {
+		err("failed to open a listening socket");
+		usbip_driver_close(driver);
+		return -1;
+	}
+
+	dbg("listening on %d address%s", nsockfd, (nsockfd == 1) ? "" : "es");
+
+	fds = calloc(nsockfd, sizeof(struct pollfd));
+	for (i = 0; i < nsockfd; i++) {
+		fds[i].fd = sockfdlist[i];
+		fds[i].events = POLLIN;
+	}
+	timeout.tv_sec = MAIN_LOOP_TIMEOUT;
+	timeout.tv_nsec = 0;
+
+	sigfillset(&sigmask);
+	sigdelset(&sigmask, SIGTERM);
+	sigdelset(&sigmask, SIGINT);
+
+	terminate = 0;
+	while (!terminate) {
+		int r;
+
+		r = ppoll(fds, nsockfd, &timeout, &sigmask);
+		if (r < 0) {
+			dbg("%s", strerror(errno));
+			terminate = 1;
+		} else if (r) {
+			for (i = 0; i < nsockfd; i++) {
+				if (fds[i].revents & POLLIN) {
+					dbg("read event on fd[%d]=%d",
+					    i, sockfdlist[i]);
+					process_request(sockfdlist[i]);
+				}
+			}
+		} else {
+			dbg("heartbeat timeout on ppoll()");
+		}
+	}
+
+	info("shutting down " PROGNAME);
+	free(fds);
+	usbip_driver_close(driver);
+
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	static const struct option longopts[] = {
+		{ "ipv4",     no_argument,       NULL, '4' },
+		{ "ipv6",     no_argument,       NULL, '6' },
+		{ "daemon",   no_argument,       NULL, 'D' },
+		{ "daemon",   no_argument,       NULL, 'D' },
+		{ "debug",    no_argument,       NULL, 'd' },
+		{ "device",   no_argument,       NULL, 'e' },
+		{ "pid",      optional_argument, NULL, 'P' },
+		{ "tcp-port", required_argument, NULL, 't' },
+		{ "help",     no_argument,       NULL, 'h' },
+		{ "version",  no_argument,       NULL, 'v' },
+		{ NULL,	      0,                 NULL,  0  }
+	};
+
+	enum {
+		cmd_standalone_mode = 1,
+		cmd_help,
+		cmd_version
+	} cmd;
+
+	int daemonize = 0;
+	int ipv4 = 0, ipv6 = 0;
+	int opt, rc = -1;
+
+	pid_file = NULL;
+
+	usbip_use_stderr = 1;
+	usbip_use_syslog = 0;
+
+	if (geteuid() != 0)
+		err("not running as root?");
+
+	cmd = cmd_standalone_mode;
+	driver = &host_driver;
+	for (;;) {
+		opt = getopt_long(argc, argv, "46DdeP::t:hv", longopts, NULL);
+
+		if (opt == -1)
+			break;
+
+		switch (opt) {
+		case '4':
+			ipv4 = 1;
+			break;
+		case '6':
+			ipv6 = 1;
+			break;
+		case 'D':
+			daemonize = 1;
+			break;
+		case 'd':
+			usbip_use_debug = 1;
+			break;
+		case 'h':
+			cmd = cmd_help;
+			break;
+		case 'P':
+			pid_file = optarg ? optarg : DEFAULT_PID_FILE;
+			break;
+		case 't':
+			usbip_setup_port_number(optarg);
+			break;
+		case 'v':
+			cmd = cmd_version;
+			break;
+		case 'e':
+			driver = &device_driver;
+			break;
+		case '?':
+			usbipd_help();
+		default:
+			goto err_out;
+		}
+	}
+
+	if (!ipv4 && !ipv6)
+		ipv4 = ipv6 = 1;
+
+	switch (cmd) {
+	case cmd_standalone_mode:
+		rc = do_standalone_mode(daemonize, ipv4, ipv6);
+		remove_pid_file();
+		break;
+	case cmd_version:
+		printf(PROGNAME " (%s)\n", usbip_version_string);
+		rc = 0;
+		break;
+	case cmd_help:
+		usbipd_help();
+		rc = 0;
+		break;
+	default:
+		usbipd_help();
+		goto err_out;
+	}
+
+err_out:
+	return (rc > -1 ? EXIT_SUCCESS : EXIT_FAILURE);
+}