diff options
Diffstat (limited to 'newlib/libc/sys/linux/net/check_pf.c')
| -rw-r--r-- | newlib/libc/sys/linux/net/check_pf.c | 199 |
1 files changed, 0 insertions, 199 deletions
diff --git a/newlib/libc/sys/linux/net/check_pf.c b/newlib/libc/sys/linux/net/check_pf.c deleted file mode 100644 index 086879e4e..000000000 --- a/newlib/libc/sys/linux/net/check_pf.c +++ /dev/null @@ -1,199 +0,0 @@ -/* Determine protocol families for which interfaces exist. Linux version. - Copyright (C) 2003 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, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <errno.h> -#include <stdint.h> -#include <ifaddrs.h> -#include <netdb.h> -#include <string.h> -#include <time.h> -#include <unistd.h> -#include <sys/socket.h> - -#include <asm/types.h> -#include <linux/netlink.h> -#include <linux/rtnetlink.h> - -#include <stdbool.h> -#include <sys/uio.h> - -#include "config.h" -#include "local.h" - -#define __ASSUME_NETLINK_SUPPORT 1 - -static int -make_request (int fd, pid_t pid, bool *seen_ipv4, bool *seen_ipv6) -{ - struct - { - struct nlmsghdr nlh; - struct rtgenmsg g; - } req; - struct sockaddr_nl nladdr; - - req.nlh.nlmsg_len = sizeof (req); - req.nlh.nlmsg_type = RTM_GETADDR; - 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; - - memset (&nladdr, '\0', sizeof (nladdr)); - nladdr.nl_family = AF_NETLINK; - - if (TEMP_FAILURE_RETRY (sendto (fd, (void *) &req, sizeof (req), 0, - (struct sockaddr *) &nladdr, - sizeof (nladdr))) < 0) - return -1; - - *seen_ipv4 = false; - *seen_ipv6 = false; - - bool done = false; - char buf[4096]; - struct iovec iov = { buf, sizeof (buf) }; - - do - { - struct msghdr msg = - { - (void *) &nladdr, sizeof (nladdr), - &iov, 1, - NULL, 0, - 0 - }; - - ssize_t read_len = TEMP_FAILURE_RETRY (recvmsg (fd, &msg, 0)); - if (read_len < 0) - return -1; - - if (msg.msg_flags & MSG_TRUNC) - return -1; - - 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_NEWADDR) - { - struct ifaddrmsg *ifam = (struct ifaddrmsg *) NLMSG_DATA (nlmh); - - switch (ifam->ifa_family) - { - case AF_INET: - *seen_ipv4 = true; - break; - case AF_INET6: - *seen_ipv6 = true; - break; - default: - /* Ignore. */ - break; - } - } - else if (nlmh->nlmsg_type == NLMSG_DONE) - /* We found the end, leave the loop. */ - done = true; - else ; - } - } - while (! done); - - close (fd); - - return 0; -} - - -/* We don't know if we have NETLINK support compiled in in our - Kernel. */ -#if __ASSUME_NETLINK_SUPPORT == 0 -/* Define in ifaddrs.h. */ -extern int __no_netlink_support attribute_hidden; -#else -# define __no_netlink_support 0 -#endif - - -void -attribute_hidden -__check_pf (bool *seen_ipv4, bool *seen_ipv6) -{ - if (! __no_netlink_support) - { - int fd = socket (PF_NETLINK, SOCK_RAW, 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 - && make_request (fd, nladdr.nl_pid, seen_ipv4, seen_ipv6) == 0) - /* It worked. */ - return; - - if (fd >= 0) - close (fd); - -#if __ASSUME_NETLINK_SUPPORT == 0 - /* Remember that there is no netlink support. */ - __no_netlink_support = 1; -#else - /* We cannot determine what interfaces are available. Be - pessimistic. */ - *seen_ipv4 = true; - *seen_ipv6 = true; -#endif - } - -#if __ASSUME_NETLINK_SUPPORT == 0 - /* No netlink. Get the interface list via getifaddrs. */ - struct ifaddrs *ifa = NULL; - if (getifaddrs (&ifa) != 0) - { - /* We cannot determine what interfaces are available. Be - pessimistic. */ - *seen_ipv4 = true; - *seen_ipv6 = true; - return; - } - - *seen_ipv4 = false; - *seen_ipv6 = false; - - struct ifaddrs *runp; - for (runp = ifa; runp != NULL; runp = runp->ifa_next) - if (runp->ifa_addr->sa_family == PF_INET) - *seen_ipv4 = true; - else if (runp->ifa_addr->sa_family == PF_INET6) - *seen_ipv6 = true; - - (void) freeifaddrs (ifa); -#endif -} |