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-rw-r--r--tools/usb/usbip/src/usbipd.c686
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);
+}
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