diff options
Diffstat (limited to 'src/3rd_party-static/libusbx-1.0.16/libusb/os/linux_netlink.c')
-rw-r--r-- | src/3rd_party-static/libusbx-1.0.16/libusb/os/linux_netlink.c | 254 |
1 files changed, 0 insertions, 254 deletions
diff --git a/src/3rd_party-static/libusbx-1.0.16/libusb/os/linux_netlink.c b/src/3rd_party-static/libusbx-1.0.16/libusb/os/linux_netlink.c deleted file mode 100644 index 3a68f69d9c..0000000000 --- a/src/3rd_party-static/libusbx-1.0.16/libusb/os/linux_netlink.c +++ /dev/null @@ -1,254 +0,0 @@ -/* -*- Mode: C; c-basic-offset:8 ; indent-tabs-mode:t -*- */ -/* - * Linux usbfs backend for libusb - * Copyright (C) 2007-2009 Daniel Drake <dsd@gentoo.org> - * Copyright (c) 2001 Johannes Erdfelt <johannes@erdfelt.com> - * Copyright (c) 2013 Nathan Hjelm <hjelmn@mac.com> - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library 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 - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "config.h" -#include <ctype.h> -#include <dirent.h> -#include <errno.h> -#include <fcntl.h> -#include <poll.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/types.h> -#include <sys/socket.h> -#include <arpa/inet.h> - -#include "libusb.h" -#include "libusbi.h" -#include "linux_usbfs.h" - -#include <linux/netlink.h> -#include <linux/filter.h> - -#define KERNEL 1 - -static int linux_netlink_socket = -1; -static pthread_t libusb_linux_event_thread; - -static void *linux_netlink_event_thread_main(void *arg); - -struct sockaddr_nl snl = { .nl_family=AF_NETLINK, .nl_groups=KERNEL }; - -int linux_netlink_start_event_monitor(void) -{ - int ret; - - snl.nl_groups = KERNEL; - - linux_netlink_socket = socket(PF_NETLINK, SOCK_RAW|SOCK_CLOEXEC|SOCK_NONBLOCK, NETLINK_KOBJECT_UEVENT); - if (-1 == linux_netlink_socket) { - return LIBUSB_ERROR_OTHER; - } - - ret = bind(linux_netlink_socket, (struct sockaddr *) &snl, sizeof(snl)); - if (0 != ret) { - return LIBUSB_ERROR_OTHER; - } - - /* TODO -- add authentication */ - /* setsockopt(linux_netlink_socket, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)); */ - - ret = pthread_create(&libusb_linux_event_thread, NULL, linux_netlink_event_thread_main, NULL); - if (0 != ret) { - return LIBUSB_ERROR_OTHER; - } - - return LIBUSB_SUCCESS; -} - -int linux_netlink_stop_event_monitor(void) -{ - int r; - - if (-1 == linux_netlink_socket) { - /* already closed. nothing to do */ - return LIBUSB_SUCCESS; - } - - r = close(linux_netlink_socket); - if (0 > r) { - usbi_err(NULL, "error closing netlink socket. %s", strerror(errno)); - return LIBUSB_ERROR_OTHER; - } - - pthread_cancel(libusb_linux_event_thread); - - linux_netlink_socket = -1; - - return LIBUSB_SUCCESS; -} - -static const char *netlink_message_parse (const char *buffer, size_t len, const char *key) -{ - size_t keylen = strlen(key); - size_t offset; - - for (offset = 0 ; offset < len && '\0' != buffer[offset] ; offset += strlen(buffer + offset) + 1) { - if (0 == strncmp(buffer + offset, key, keylen) && - '=' == buffer[offset + keylen]) { - return buffer + offset + keylen + 1; - } - } - - return NULL; -} - -/* parse parts of netlink message common to both libudev and the kernel */ -static int linux_netlink_parse(char *buffer, size_t len, int *detached, const char **sys_name, - uint8_t *busnum, uint8_t *devaddr) { - const char *tmp; - int i; - - errno = 0; - - *sys_name = NULL; - *detached = 0; - *busnum = 0; - *devaddr = 0; - - tmp = netlink_message_parse((const char *) buffer, len, "ACTION"); - if (tmp == NULL) - return -1; - if (0 == strcmp(tmp, "remove")) { - *detached = 1; - } else if (0 != strcmp(tmp, "add")) { - usbi_dbg("unknown device action %s", tmp); - return -1; - } - - /* check that this is a usb message */ - tmp = netlink_message_parse(buffer, len, "SUBSYSTEM"); - if (NULL == tmp || 0 != strcmp(tmp, "usb")) { - /* not usb. ignore */ - return -1; - } - - tmp = netlink_message_parse(buffer, len, "BUSNUM"); - if (NULL == tmp) { - /* no bus number (likely a usb interface). ignore*/ - return -1; - } - - *busnum = (uint8_t)(strtoul(tmp, NULL, 10) & 0xff); - if (errno) { - errno = 0; - return -1; - } - - tmp = netlink_message_parse(buffer, len, "DEVNUM"); - if (NULL == tmp) { - return -1; - } - - *devaddr = (uint8_t)(strtoul(tmp, NULL, 10) & 0xff); - if (errno) { - errno = 0; - return -1; - } - - tmp = netlink_message_parse(buffer, len, "DEVPATH"); - if (NULL == tmp) { - return -1; - } - - for (i = strlen(tmp) - 1 ; i ; --i) { - if ('/' ==tmp[i]) { - *sys_name = tmp + i + 1; - break; - } - } - - /* found a usb device */ - return 0; -} - -static int linux_netlink_read_message(void) -{ - unsigned char buffer[1024]; - struct iovec iov = {.iov_base = buffer, .iov_len = sizeof(buffer)}; - struct msghdr meh = { .msg_iov=&iov, .msg_iovlen=1, - .msg_name=&snl, .msg_namelen=sizeof(snl) }; - const char *sys_name = NULL; - uint8_t busnum, devaddr; - int detached, r; - size_t len; - - /* read netlink message */ - memset(buffer, 0, sizeof(buffer)); - len = recvmsg(linux_netlink_socket, &meh, 0); - if (len < 32) { - if (errno != EAGAIN) - usbi_dbg("error recieving message from netlink"); - return -1; - } - - /* TODO -- authenticate this message is from the kernel or udevd */ - - r = linux_netlink_parse(buffer, len, &detached, &sys_name, - &busnum, &devaddr); - if (r) - return r; - - usbi_dbg("netlink hotplug found device busnum: %hhu, devaddr: %hhu, sys_name: %s, removed: %s", - busnum, devaddr, sys_name, detached ? "yes" : "no"); - - /* signal device is available (or not) to all contexts */ - if (detached) - linux_hotplug_disconnected(busnum, devaddr, sys_name); - else - linux_hotplug_enumerate(busnum, devaddr, sys_name); - - return 0; -} - -static void *linux_netlink_event_thread_main(void *arg) -{ - struct pollfd fds = {.fd = linux_netlink_socket, - .events = POLLIN}; - - /* silence compiler warning */ - (void) arg; - - while (1 == poll(&fds, 1, -1)) { - if (POLLIN != fds.revents) { - break; - } - - usbi_mutex_static_lock(&linux_hotplug_lock); - linux_netlink_read_message(); - usbi_mutex_static_unlock(&linux_hotplug_lock); - } - - return NULL; -} - -void linux_netlink_hotplug_poll(void) -{ - int r; - - usbi_mutex_static_lock(&linux_hotplug_lock); - do { - r = linux_netlink_read_message(); - } while (r == 0); - usbi_mutex_static_unlock(&linux_hotplug_lock); -} |