From a5a1fa28ac071a52b93e6adea143bba326133a46 Mon Sep 17 00:00:00 2001 From: Donnie Pollitz Date: Tue, 4 Jan 2022 12:52:31 +0100 Subject: Add initial usbip util binary. BYPASS_INCLUSIVE_LANGUAGE_REASON=Maintain license wording Bug: 191449513 Test: Ran unit tests Signed-off-by: Donnie Pollitz Change-Id: I1a3b06e261502e3c393a1b6464573616b6941bbc --- emulator/aosp_car_emulator.mk | 1 + emulator/usbip-service/Android.bp | 63 +++++ emulator/usbip-service/COPYING | 340 +++++++++++++++++++++++ emulator/usbip-service/README.md | 4 + emulator/usbip-service/TEST_MAPPING | 8 + emulator/usbip-service/UsbIpService.cpp | 55 ++++ emulator/usbip-service/UsbIpTest.cpp | 101 +++++++ emulator/usbip-service/UsbIpUtils.cpp | 178 ++++++++++++ emulator/usbip-service/UsbIpUtils.h | 25 ++ emulator/usbip-service/sepolicy/file_contexts | 4 + emulator/usbip-service/sepolicy/usbip_service.te | 16 ++ emulator/usbip-service/usbip-service.mk | 19 ++ emulator/usbip-service/usbip-service.rc | 2 + 13 files changed, 816 insertions(+) create mode 100644 emulator/usbip-service/Android.bp create mode 100644 emulator/usbip-service/COPYING create mode 100644 emulator/usbip-service/README.md create mode 100644 emulator/usbip-service/TEST_MAPPING create mode 100644 emulator/usbip-service/UsbIpService.cpp create mode 100644 emulator/usbip-service/UsbIpTest.cpp create mode 100644 emulator/usbip-service/UsbIpUtils.cpp create mode 100644 emulator/usbip-service/UsbIpUtils.h create mode 100644 emulator/usbip-service/sepolicy/file_contexts create mode 100644 emulator/usbip-service/sepolicy/usbip_service.te create mode 100644 emulator/usbip-service/usbip-service.mk create mode 100644 emulator/usbip-service/usbip-service.rc diff --git a/emulator/aosp_car_emulator.mk b/emulator/aosp_car_emulator.mk index abf872d..b4ea95a 100644 --- a/emulator/aosp_car_emulator.mk +++ b/emulator/aosp_car_emulator.mk @@ -27,6 +27,7 @@ $(call inherit-product, device/generic/car/emulator/audio/car_emulator_audio.mk) $(call inherit-product, device/generic/car/emulator/rotary/car_rotary.mk) # Enables USB and BT-USB passthrough $(call inherit-product, device/generic/car/emulator/btusb-passthrough/btusb.mk) +$(call inherit-product, device/generic/car/emulator/usbip-service/usbip-service.mk) ifeq (true,$(BUILD_EMULATOR_CLUSTER_DISPLAY)) PRODUCT_COPY_FILES += \ diff --git a/emulator/usbip-service/Android.bp b/emulator/usbip-service/Android.bp new file mode 100644 index 0000000..9ad8446 --- /dev/null +++ b/emulator/usbip-service/Android.bp @@ -0,0 +1,63 @@ +package { + default_applicable_licenses: ["external_usbip-service_license"], +} + +license { + name: "external_usbip-service_license", + visibility: [":__subpackages__"], + license_kinds: ["SPDX-license-identifier-GPL-2.0"], + license_text: ["COPYING"], +} + +cc_defaults { + name: "usbip_defaults", + host_supported: true, + cflags: [ + "-Wall", + "-Werror", + ], + shared_libs: [ + "liblog", + "libutils", + "libcutils", + "libbase", + "libc++", + ], + product_specific: true, + stl: "none", +} + +cc_binary { + name: "usbip_service", + init_rc: ["usbip-service.rc"], + defaults: ["usbip_defaults"], + srcs: [ + "UsbIpService.cpp" + ], + static_libs: [ + "usbip_utils", + ], +} + +cc_library { + name: "usbip_utils", + defaults: ["usbip_defaults"], + srcs: [ + "UsbIpUtils.cpp" + ], + export_include_dirs: ["./"], +} + +cc_test { + name: "usbip_test", + defaults: ["usbip_defaults"], + srcs: ["UsbIpTest.cpp"], + test_suites: ["general-tests"], + + test_options: { + unit_test: false, + }, + shared_libs: [ + "usbip_utils", + ], +} diff --git a/emulator/usbip-service/COPYING b/emulator/usbip-service/COPYING new file mode 100644 index 0000000..c5611e4 --- /dev/null +++ b/emulator/usbip-service/COPYING @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/emulator/usbip-service/README.md b/emulator/usbip-service/README.md new file mode 100644 index 0000000..693e86d --- /dev/null +++ b/emulator/usbip-service/README.md @@ -0,0 +1,4 @@ +Implements a very basic version of usbip. + +GPLv2 license is maintained in this directory since it implements interfaces +provided by the usbip library. diff --git a/emulator/usbip-service/TEST_MAPPING b/emulator/usbip-service/TEST_MAPPING new file mode 100644 index 0000000..c977d11 --- /dev/null +++ b/emulator/usbip-service/TEST_MAPPING @@ -0,0 +1,8 @@ +{ + "presubmit": [ + { + "name": "usbpip_test", + "host": true + } + ] +} diff --git a/emulator/usbip-service/UsbIpService.cpp b/emulator/usbip-service/UsbIpService.cpp new file mode 100644 index 0000000..26d2f3d --- /dev/null +++ b/emulator/usbip-service/UsbIpService.cpp @@ -0,0 +1,55 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "UsbIpUtils.h" + +int main(int argc, char *argv[]) { + if (argc != 4) { + ALOGE("usage: 'usbip_service '\n"); + return -1; + } + ALOGD("IP: %s\nPort: %s\nDevId: %s\n", argv[1], argv[2], argv[3]); + + usbip_conn_info info; + if (!get_usbip_connection(argv[1], argv[2], argv[3], &info)) { + ALOGE("Couldn't retrieve socket connection\n"); + return -1; + } + + // Get free port. + FILE *file = fopen("/sys/devices/platform/vhci_hcd.0/status", "r"); + if (file == NULL) { + ALOGE("Couldn't open sysfs status file: %s\n", strerror(errno)); + close(info.sock_fd); + return -1; + } + int port_num = get_free_vhci_port(file, info.speed); + + // Pass socket to the kernel driver. + int fd = + openat(AT_FDCWD, "/sys/devices/platform/vhci_hcd.0/attach", O_WRONLY); + if (fd == -1) { + ALOGE("Couldn't open sysfs attach file: %s\n", strerror(errno)); + close(info.sock_fd); + return -1; + } + if (dprintf(fd, "%d %d %d %d", port_num, info.sock_fd, info.dev_id, + info.speed) < 0) { + ALOGE("Failed to attach socket to VHCI.\n"); + close(info.sock_fd); + close(fd); + return -1; + } + + close(info.sock_fd); + close(fd); + return 0; +} diff --git a/emulator/usbip-service/UsbIpTest.cpp b/emulator/usbip-service/UsbIpTest.cpp new file mode 100644 index 0000000..97ef09c --- /dev/null +++ b/emulator/usbip-service/UsbIpTest.cpp @@ -0,0 +1,101 @@ +/* + * Copyright (C) 2016 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#include + +#include +#include + +#include "UsbIpUtils.h" + +/* No virtual USB devices are attached. */ +static const std::string EMPTY_STATUS = + "hub port sta spd dev sockfd local_busid\n" + "hs 0000 004 000 00000000 000000 0-0\n" + "hs 0001 004 000 00000000 000000 0-0\n" + "hs 0002 004 000 00000000 000000 0-0\n" + "hs 0003 004 000 00000000 000000 0-0\n" + "ss 0004 004 000 00000000 000000 0-0\n" + "ss 0005 004 000 00000000 000000 0-0\n" + "ss 0006 004 000 00000000 000000 0-0\n" + "ss 0007 004 000 00000000 000000 0-0"; + +/* A single high speed an super speed device are attached. */ +static const std::string PORTS_ALLOCATED = + "hub port sta spd dev sockfd local_busid\n" + "hs 0000 006 003 00010003 000003 4-1\n" + "hs 0001 004 000 00000000 000000 0-0\n" + "hs 0002 004 000 00000000 000000 0-0\n" + "hs 0003 004 000 00000000 000000 0-0\n" + "ss 0004 006 004 00010004 000004 5-1\n" + "ss 0005 004 000 00000000 000000 0-0\n" + "ss 0006 004 000 00000000 000000 0-0\n" + "ss 0007 004 000 00000000 000000 0-0"; + +/* All USB device ports are allocated. */ +static const std::string NONE_AVAILABLE = + "hub port sta spd dev sockfd local_busid\n" + "hs 0000 006 003 00010001 000003 4-1\n" + "hs 0001 006 003 00010002 000004 4-2\n" + "hs 0002 006 003 00010003 000005 4-3\n" + "hs 0003 006 003 00010004 000006 4-4\n" + "ss 0004 006 004 00010005 000007 5-1\n" + "ss 0005 006 004 00010006 000008 5-2\n" + "ss 0006 006 004 00010007 000009 5-3\n" + "ss 0007 006 004 00010008 000010 5-4"; + +/* + * Returns a file pointer associated with a std::string. + * NOTE: User should call fclose on the pointer when done. + */ +static FILE *get_fp_from_string(const std::string &test_input) { + return fmemopen((void *)test_input.c_str(), test_input.size(), "r"); +} + +TEST(UsbIpTest, ReturnsFirstHighSpeedPort) { + FILE *file = get_fp_from_string(EMPTY_STATUS); + ASSERT_EQ(get_free_vhci_port(file, USBIP_SPEED_HIGH), 0); + fclose(file); +} + +TEST(UsbIpTest, ReturnsFirstSuperSpeedPort) { + FILE *file = get_fp_from_string(EMPTY_STATUS); + ASSERT_EQ(get_free_vhci_port(file, USBIP_SPEED_SUPER), 4); + fclose(file); +} + +TEST(UsbIpTest, ReturnsFirstFreeHighSpeedPort) { + FILE *file = get_fp_from_string(PORTS_ALLOCATED); + ASSERT_EQ(get_free_vhci_port(file, USBIP_SPEED_HIGH), 1); + fclose(file); +} + +TEST(UsbIpTest, ReturnsFirstFreeSuperSpeedPort) { + FILE *file = get_fp_from_string(PORTS_ALLOCATED); + ASSERT_EQ(get_free_vhci_port(file, USBIP_SPEED_SUPER), 5); + fclose(file); +} + +TEST(UsbIpTest, AllHighSpeedPortsAllocatted) { + FILE *file = get_fp_from_string(NONE_AVAILABLE); + ASSERT_EQ(get_free_vhci_port(file, USBIP_SPEED_HIGH), -1); + fclose(file); +} + +TEST(UsbIpTest, AllSuperSpeedPortsAllocated) { + FILE *file = get_fp_from_string(NONE_AVAILABLE); + ASSERT_EQ(get_free_vhci_port(file, USBIP_SPEED_SUPER), -1); + fclose(file); +} diff --git a/emulator/usbip-service/UsbIpUtils.cpp b/emulator/usbip-service/UsbIpUtils.cpp new file mode 100644 index 0000000..ce449f7 --- /dev/null +++ b/emulator/usbip-service/UsbIpUtils.cpp @@ -0,0 +1,178 @@ +#include "UsbIpUtils.h" + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +constexpr uint16_t kIpVersion = 0x0111; + +constexpr uint16_t kOpRequest = 0x8003; +constexpr uint16_t kOpResponse = 0x0003; + +// Fields associated with all USBIP packets. +typedef struct op_req_common { + uint16_t ip_version; + uint16_t command_code; + uint32_t status; +} op_req_common; + +typedef struct op_req_import { + op_req_common common; + uint32_t busid[8]; +} op_req_import; + +typedef struct op_rep_import { + op_req_common common; +} op_rep_import; + +// Metadata fields only valid for successful status flag. +typedef struct op_rep_import_metadata { + uint32_t path[64]; + uint32_t bus_id[8]; + uint32_t bus_num; + uint32_t dev_num; + uint32_t speed; + uint16_t id_vendor; + uint16_t id_product; + uint16_t bcd_device; + uint8_t device_class; + uint8_t device_subclass; + uint8_t device_protocol; + uint8_t configuration_value; + uint8_t num_configurations; + uint8_t num_interfaces; +} op_rep_import_success; + +bool get_usbip_connection(const char *server, const char *port, + const char *dev_id, usbip_conn_info *info) { + struct sockaddr_in address; + + // Setup socket to the server. + if ((info->sock_fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == 0) { + ALOGE("Opening socket failed: %s\n", strerror(errno)); + return false; + } + + int flags = 1; + if (setsockopt(info->sock_fd, SOL_SOCKET, SO_KEEPALIVE, &flags, + sizeof(flags)) == -1) { + ALOGE("Failed to enable keep alive: %s\n", strerror(errno)); + close(info->sock_fd); + return false; + } + if (setsockopt(info->sock_fd, SOL_TCP, TCP_NODELAY, &flags, + sizeof(flags)) == -1) { + ALOGE("Failed to enable no delay: %s\n", strerror(errno)); + close(info->sock_fd); + return false; + } + + address.sin_family = AF_INET; + if (inet_aton(server, &address.sin_addr) == 0) { + ALOGE("Failure to convert ip address %s\n", server); + close(info->sock_fd); + return false; + } + + errno = 0; + char *error; + address.sin_port = strtol(port, &error, 10); + if (address.sin_port == 0) { + ALOGE("Port is invalid %s\n", port); + close(info->sock_fd); + return false; + } + address.sin_port = htons(address.sin_port); + if (connect(info->sock_fd, (struct sockaddr *)&address, sizeof(address)) == + -1) { + ALOGE("Connection failed: %s\n", strerror(errno)); + close(info->sock_fd); + return false; + } + + // Fill in op request + op_req_import op_req; + op_req.common.ip_version = htons(kIpVersion); + op_req.common.command_code = htons(kOpRequest); + op_req.common.status = 0x0000; + strncpy((char *)op_req.busid, dev_id, sizeof(op_req.busid)); + + if (send(info->sock_fd, &op_req, sizeof(op_req), 0) == -1) { + ALOGE("Error sending op_req: %s\n", strerror(errno)); + close(info->sock_fd); + return false; + } + + // Read in op response. + op_rep_import op_rep; + if (recv(info->sock_fd, &op_rep, sizeof(op_rep), MSG_WAITALL) == -1) { + ALOGE("Error receiving op_rep: %s\n", strerror(errno)); + close(info->sock_fd); + return false; + } + + if (op_rep.common.status != 0) { + ALOGE("op_rep status is invalid.\n"); + close(info->sock_fd); + return false; + } + + uint16_t command = ntohs(op_rep.common.command_code); + if (command != kOpResponse) { + ALOGE("Invalid command expected: %d received: %d", command, kOpResponse); + close(info->sock_fd); + return false; + } + + op_rep_import_success data; + if (recv(info->sock_fd, &data, sizeof(data), MSG_WAITALL) == -1) { + ALOGE("Error receiving op_rep_data: %s\n", strerror(errno)); + close(info->sock_fd); + return false; + } + + int temp_bus_num = ntohl(data.bus_num); + int temp_dev_num = ntohl(data.dev_num); + info->speed = ntohl(data.speed); + info->dev_id = (temp_bus_num << 16) | temp_dev_num; + return true; +} + +int get_free_vhci_port(FILE *file, int speed) { + // Throw away the header line. + char *buf = NULL; + size_t length = 0; + if (getline(&buf, &length, file) == -1) { + ALOGE("Couldn't get the header line: %s\n", strerror(errno)); + free(buf); + return -1; + } + free(buf); + + char busid[32]; + char hub[3]; + int port = 0; + int status = 0; + int spd = 0; + int dev = 0; + int sockfd = 0; + const char *expected_hub = (speed == USBIP_SPEED_SUPER) ? "ss" : "hs"; + + // Scan status lines for a free USB port. + while (fscanf(file, "%2s %d %d %d %x %u %31s\n", hub, &port, &status, &spd, + &dev, &sockfd, busid) != EOF) { + if (strcmp(expected_hub, hub) == 0 && status == USBIP_VDEV_NULL) { + return port; + } + } + + return -1; +} diff --git a/emulator/usbip-service/UsbIpUtils.h b/emulator/usbip-service/UsbIpUtils.h new file mode 100644 index 0000000..c410ba0 --- /dev/null +++ b/emulator/usbip-service/UsbIpUtils.h @@ -0,0 +1,25 @@ +#include + +// Speed constants +inline constexpr int USBIP_SPEED_HIGH = 3; +inline constexpr int USBIP_SPEED_SUPER = 4; + +// Status Constants +inline constexpr int USBIP_VDEV_NULL = 4; + +// Connection information +typedef struct usbip_conn_info { + int sock_fd; + int speed; + int dev_id; +} usbip_conn_info; + +/* + * Connects to server and retrieves required info for connection. + * NOTE: User must close the sock_fd when they are done with it. + */ +bool get_usbip_connection(const char *server, const char *port, + const char *dev_id, usbip_conn_info *info); + +/* Returns free port number from vhci, -1 on failure. */ +int get_free_vhci_port(FILE *file, int speed); diff --git a/emulator/usbip-service/sepolicy/file_contexts b/emulator/usbip-service/sepolicy/file_contexts new file mode 100644 index 0000000..47fe583 --- /dev/null +++ b/emulator/usbip-service/sepolicy/file_contexts @@ -0,0 +1,4 @@ +/product/bin/usbip_service u:object_r:usbip_service_exec:s0 +/sys/devices/platform/vhci_hcd.0/status u:object_r:sysfs_usbip:s0 +/sys/devices/platform/vhci_hcd.0/attach u:object_r:sysfs_usbip:s0 + diff --git a/emulator/usbip-service/sepolicy/usbip_service.te b/emulator/usbip-service/sepolicy/usbip_service.te new file mode 100644 index 0000000..b885493 --- /dev/null +++ b/emulator/usbip-service/sepolicy/usbip_service.te @@ -0,0 +1,16 @@ +type usbip_service, domain; +type sysfs_usbip, sysfs_type, fs_type; +type usbip_service_exec, exec_type, system_file_type, file_type; + +net_domain(usbip_service); + +allow usbip_service netd:tcp_socket { read write }; + +allow kernel su:tcp_socket { read write }; +allow kernel shell:tcp_socket { read write }; + +allow init sysfs_usbip:file setattr; + +allow shell sysfs_usbip:dir { r_dir_perms }; +allow shell sysfs_usbip:file { rw_file_perms }; +allow shell usbip_service_exec:file { execute execute_no_trans getattr map open read }; diff --git a/emulator/usbip-service/usbip-service.mk b/emulator/usbip-service/usbip-service.mk new file mode 100644 index 0000000..84c2cca --- /dev/null +++ b/emulator/usbip-service/usbip-service.mk @@ -0,0 +1,19 @@ +# +# Copyright (C) 2021 Google Inc. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +PRODUCT_PACKAGES += usbip_service +BOARD_SEPOLICY_DIRS += device/generic/car/emulator/usbip-service/sepolicy + diff --git a/emulator/usbip-service/usbip-service.rc b/emulator/usbip-service/usbip-service.rc new file mode 100644 index 0000000..7172bb7 --- /dev/null +++ b/emulator/usbip-service/usbip-service.rc @@ -0,0 +1,2 @@ +on boot + chmod 222 /sys/bus/platform/devices/vhci_hcd.0/attach -- cgit v1.2.3