diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/check_native.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/check_native.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/sysdeps/unix/sysv/linux/check_native.c b/sysdeps/unix/sysv/linux/check_native.c deleted file mode 100644 index 7e5a7c9be3..0000000000 --- a/sysdeps/unix/sysv/linux/check_native.c +++ /dev/null @@ -1,177 +0,0 @@ -/* Determine whether interfaces use native transport. Linux version. - Copyright (C) 2007-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C 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. - - The GNU C 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 the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <assert.h> -#include <errno.h> -#include <ifaddrs.h> -#include <stddef.h> -#include <stdint.h> -#include <stdlib.h> -#include <string.h> -#include <time.h> -#include <unistd.h> -#include <net/if.h> -#include <net/if_arp.h> -#include <sys/ioctl.h> - -#include <asm/types.h> -#include <linux/netlink.h> -#include <linux/rtnetlink.h> - -#include <not-cancel.h> - -#include "netlinkaccess.h" - -void -__check_native (uint32_t a1_index, int *a1_native, - uint32_t a2_index, int *a2_native) -{ - int fd = __socket (PF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE); - - struct sockaddr_nl nladdr; - memset (&nladdr, '\0', sizeof (nladdr)); - nladdr.nl_family = AF_NETLINK; - - socklen_t addr_len = sizeof (nladdr); - - if (fd < 0 - || __bind (fd, (struct sockaddr *) &nladdr, sizeof (nladdr)) != 0 - || __getsockname (fd, (struct sockaddr *) &nladdr, &addr_len) != 0) - return; - - pid_t pid = nladdr.nl_pid; - struct req - { - struct nlmsghdr nlh; - struct rtgenmsg g; - /* struct rtgenmsg consists of a single byte. This means there - are three bytes of padding included in the REQ definition. - We make them explicit here. */ - char pad[3]; - } req; - - req.nlh.nlmsg_len = sizeof (req); - req.nlh.nlmsg_type = RTM_GETLINK; - req.nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; - req.nlh.nlmsg_pid = 0; - req.nlh.nlmsg_seq = time (NULL); - req.g.rtgen_family = AF_UNSPEC; - - assert (sizeof (req) - offsetof (struct req, pad) == 3); - memset (req.pad, '\0', sizeof (req.pad)); - - memset (&nladdr, '\0', sizeof (nladdr)); - nladdr.nl_family = AF_NETLINK; - -#ifdef PAGE_SIZE - /* Help the compiler optimize out the malloc call if PAGE_SIZE - is constant and smaller or equal to PTHREAD_STACK_MIN/4. */ - const size_t buf_size = PAGE_SIZE; -#else - const size_t buf_size = __getpagesize (); -#endif - bool use_malloc = false; - char *buf; - - if (__libc_use_alloca (buf_size)) - buf = alloca (buf_size); - else - { - buf = malloc (buf_size); - if (buf != NULL) - use_malloc = true; - else - goto out_fail; - } - - struct iovec iov = { buf, buf_size }; - - if (TEMP_FAILURE_RETRY (__sendto (fd, (void *) &req, sizeof (req), 0, - (struct sockaddr *) &nladdr, - sizeof (nladdr))) < 0) - goto out_fail; - - bool done = false; - do - { - struct msghdr msg = - { - .msg_name = (void *) &nladdr, - .msg_namelen = sizeof (nladdr), - .msg_iov = &iov, - .msg_iovlen = 1, - .msg_control = NULL, - .msg_controllen = 0, - .msg_flags = 0 - }; - - ssize_t read_len = TEMP_FAILURE_RETRY (__recvmsg (fd, &msg, 0)); - __netlink_assert_response (fd, read_len); - if (read_len < 0) - goto out_fail; - - if (msg.msg_flags & MSG_TRUNC) - goto out_fail; - - struct nlmsghdr *nlmh; - for (nlmh = (struct nlmsghdr *) buf; - NLMSG_OK (nlmh, (size_t) read_len); - nlmh = (struct nlmsghdr *) NLMSG_NEXT (nlmh, read_len)) - { - if (nladdr.nl_pid != 0 || (pid_t) nlmh->nlmsg_pid != pid - || nlmh->nlmsg_seq != req.nlh.nlmsg_seq) - continue; - - if (nlmh->nlmsg_type == RTM_NEWLINK) - { - struct ifinfomsg *ifim = (struct ifinfomsg *) NLMSG_DATA (nlmh); - int native = (ifim->ifi_type != ARPHRD_TUNNEL6 - && ifim->ifi_type != ARPHRD_TUNNEL - && ifim->ifi_type != ARPHRD_SIT); - - if (a1_index == ifim->ifi_index) - { - *a1_native = native; - a1_index = 0xffffffffu; - } - if (a2_index == ifim->ifi_index) - { - *a2_native = native; - a2_index = 0xffffffffu; - } - - if (a1_index == 0xffffffffu - && a2_index == 0xffffffffu) - goto out; - } - else if (nlmh->nlmsg_type == NLMSG_DONE) - /* We found the end, leave the loop. */ - done = true; - } - } - while (! done); - - out: - close_not_cancel_no_status (fd); - - return; - -out_fail: - if (use_malloc) - free (buf); -} |