/release/src/router/zebra/zebra/ioctl.c
C | 539 lines | 403 code | 91 blank | 45 comment | 23 complexity | f6335ee3cfe78028182e2e70a354a34e MD5 | raw file
- /*
- * Common ioctl functions.
- * Copyright (C) 1997, 98 Kunihiro Ishiguro
- *
- * This file is part of GNU Zebra.
- *
- * GNU Zebra is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2, or (at your option) any
- * later version.
- *
- * GNU Zebra 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
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GNU Zebra; see the file COPYING. If not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
- */
- #include <zebra.h>
- #include "linklist.h"
- #include "if.h"
- #include "prefix.h"
- #include "ioctl.h"
- #include "log.h"
- #include "zebra/rib.h"
- #include "zebra/rt.h"
- /* clear and set interface name string */
- void
- ifreq_set_name (struct ifreq *ifreq, struct interface *ifp)
- {
- strncpy (ifreq->ifr_name, ifp->name, IFNAMSIZ);
- }
- /* call ioctl system call */
- int
- if_ioctl (u_long request, caddr_t buffer)
- {
- int sock;
- int ret = 0;
- int err = 0;
- sock = socket (AF_INET, SOCK_DGRAM, 0);
- if (sock < 0)
- {
- perror ("socket");
- exit (1);
- }
- ret = ioctl (sock, request, buffer);
- if (ret < 0)
- {
- err = errno;
- }
- close (sock);
-
- if (ret < 0)
- {
- errno = err;
- return ret;
- }
- return 0;
- }
- #ifdef HAVE_IPV6
- int
- if_ioctl_ipv6 (u_long request, caddr_t buffer)
- {
- int sock;
- int ret = 0;
- int err = 0;
- sock = socket (AF_INET6, SOCK_DGRAM, 0);
- if (sock < 0)
- {
- perror ("socket");
- exit (1);
- }
- ret = ioctl (sock, request, buffer);
- if (ret < 0)
- {
- err = errno;
- }
- close (sock);
-
- if (ret < 0)
- {
- errno = err;
- return ret;
- }
- return 0;
- }
- #endif /* HAVE_IPV6 */
- /*
- * get interface metric
- * -- if value is not avaliable set -1
- */
- void
- if_get_metric (struct interface *ifp)
- {
- #ifdef SIOCGIFMETRIC
- struct ifreq ifreq;
- ifreq_set_name (&ifreq, ifp);
- if (if_ioctl (SIOCGIFMETRIC, (caddr_t) &ifreq) < 0)
- return;
- ifp->metric = ifreq.ifr_metric;
- if (ifp->metric == 0)
- ifp->metric = 1;
- #else /* SIOCGIFMETRIC */
- ifp->metric = -1;
- #endif /* SIOCGIFMETRIC */
- }
- /* get interface MTU */
- void
- if_get_mtu (struct interface *ifp)
- {
- struct ifreq ifreq;
- ifreq_set_name (&ifreq, ifp);
- #if defined(SIOCGIFMTU)
- if (if_ioctl (SIOCGIFMTU, (caddr_t) & ifreq) < 0)
- {
- zlog_info ("Can't lookup mtu by ioctl(SIOCGIFMTU)");
- ifp->mtu = -1;
- return;
- }
- #ifdef SUNOS_5
- ifp->mtu = ifreq.ifr_metric;
- #else
- ifp->mtu = ifreq.ifr_mtu;
- #endif /* SUNOS_5 */
- #else
- zlog (NULL, LOG_INFO, "Can't lookup mtu on this system");
- ifp->mtu = -1;
- #endif
- }
- #ifdef HAVE_NETLINK
- /* Interface address setting via netlink interface. */
- int
- if_set_prefix (struct interface *ifp, struct connected *ifc)
- {
- return kernel_address_add_ipv4 (ifp, ifc);
- }
- /* Interface address is removed using netlink interface. */
- int
- if_unset_prefix (struct interface *ifp, struct connected *ifc)
- {
- return kernel_address_delete_ipv4 (ifp, ifc);
- }
- #else /* ! HAVE_NETLINK */
- #ifdef HAVE_IFALIASREQ
- /* Set up interface's IP address, netmask (and broadcas? ). *BSD may
- has ifaliasreq structure. */
- int
- if_set_prefix (struct interface *ifp, struct connected *ifc)
- {
- int ret;
- struct ifaliasreq addreq;
- struct sockaddr_in addr;
- struct sockaddr_in mask;
- struct prefix_ipv4 *p;
- p = (struct prefix_ipv4 *) ifc->address;
- bzero (&addreq, sizeof addreq);
- strncpy ((char *)&addreq.ifra_name, ifp->name, sizeof addreq.ifra_name);
- bzero (&addr, sizeof (struct sockaddr_in));
- addr.sin_addr = p->prefix;
- addr.sin_family = p->family;
- #ifdef HAVE_SIN_LEN
- addr.sin_len = sizeof (struct sockaddr_in);
- #endif
- memcpy (&addreq.ifra_addr, &addr, sizeof (struct sockaddr_in));
- bzero (&mask, sizeof (struct sockaddr_in));
- masklen2ip (p->prefixlen, &mask.sin_addr);
- mask.sin_family = p->family;
- #ifdef HAVE_SIN_LEN
- mask.sin_len = sizeof (struct sockaddr_in);
- #endif
- memcpy (&addreq.ifra_mask, &mask, sizeof (struct sockaddr_in));
-
- ret = if_ioctl (SIOCAIFADDR, (caddr_t) &addreq);
- if (ret < 0)
- return ret;
- return 0;
- }
- /* Set up interface's IP address, netmask (and broadcas? ). *BSD may
- has ifaliasreq structure. */
- int
- if_unset_prefix (struct interface *ifp, struct connected *ifc)
- {
- int ret;
- struct ifaliasreq addreq;
- struct sockaddr_in addr;
- struct sockaddr_in mask;
- struct prefix_ipv4 *p;
- p = (struct prefix_ipv4 *)ifc->address;
- bzero (&addreq, sizeof addreq);
- strncpy ((char *)&addreq.ifra_name, ifp->name, sizeof addreq.ifra_name);
- bzero (&addr, sizeof (struct sockaddr_in));
- addr.sin_addr = p->prefix;
- addr.sin_family = p->family;
- #ifdef HAVE_SIN_LEN
- addr.sin_len = sizeof (struct sockaddr_in);
- #endif
- memcpy (&addreq.ifra_addr, &addr, sizeof (struct sockaddr_in));
- bzero (&mask, sizeof (struct sockaddr_in));
- masklen2ip (p->prefixlen, &mask.sin_addr);
- mask.sin_family = p->family;
- #ifdef HAVE_SIN_LEN
- mask.sin_len = sizeof (struct sockaddr_in);
- #endif
- memcpy (&addreq.ifra_mask, &mask, sizeof (struct sockaddr_in));
-
- ret = if_ioctl (SIOCDIFADDR, (caddr_t) &addreq);
- if (ret < 0)
- return ret;
- return 0;
- }
- #else
- /* Set up interface's address, netmask (and broadcas? ). Linux or
- Solaris uses ifname:number semantics to set IP address aliases. */
- int
- if_set_prefix (struct interface *ifp, struct connected *ifc)
- {
- int ret;
- struct ifreq ifreq;
- struct sockaddr_in addr;
- struct sockaddr_in broad;
- struct sockaddr_in mask;
- struct prefix_ipv4 ifaddr;
- struct prefix_ipv4 *p;
- p = (struct prefix_ipv4 *) ifc->address;
- ifaddr = *p;
- ifreq_set_name (&ifreq, ifp);
- addr.sin_addr = p->prefix;
- addr.sin_family = p->family;
- memcpy (&ifreq.ifr_addr, &addr, sizeof (struct sockaddr_in));
- ret = if_ioctl (SIOCSIFADDR, (caddr_t) &ifreq);
- if (ret < 0)
- return ret;
-
- /* We need mask for make broadcast addr. */
- masklen2ip (p->prefixlen, &mask.sin_addr);
- if (if_is_broadcast (ifp))
- {
- apply_mask_ipv4 (&ifaddr);
- addr.sin_addr = ifaddr.prefix;
- broad.sin_addr.s_addr = (addr.sin_addr.s_addr | ~mask.sin_addr.s_addr);
- broad.sin_family = p->family;
- memcpy (&ifreq.ifr_broadaddr, &broad, sizeof (struct sockaddr_in));
- ret = if_ioctl (SIOCSIFBRDADDR, (caddr_t) &ifreq);
- if (ret < 0)
- return ret;
- }
- mask.sin_family = p->family;
- #ifdef SUNOS_5
- memcpy (&mask, &ifreq.ifr_addr, sizeof (mask));
- #else
- memcpy (&ifreq.ifr_netmask, &mask, sizeof (struct sockaddr_in));
- #endif /* SUNOS5 */
- ret = if_ioctl (SIOCSIFNETMASK, (caddr_t) &ifreq);
- if (ret < 0)
- return ret;
- /* Linux version before 2.1.0 need to interface route setup. */
- #if defined(GNU_LINUX) && LINUX_VERSION_CODE < 131328
- {
- apply_mask_ipv4 (&ifaddr);
- kernel_add_route (&ifaddr, NULL, ifp->ifindex, 0, 0);
- }
- #endif /* ! (GNU_LINUX && LINUX_VERSION_CODE) */
- return 0;
- }
- /* Set up interface's address, netmask (and broadcas? ). Linux or
- Solaris uses ifname:number semantics to set IP address aliases. */
- int
- if_unset_prefix (struct interface *ifp, struct connected *ifc)
- {
- int ret;
- struct ifreq ifreq;
- struct sockaddr_in addr;
- struct prefix_ipv4 *p;
- p = (struct prefix_ipv4 *) ifc->address;
- ifreq_set_name (&ifreq, ifp);
- bzero (&addr, sizeof (struct sockaddr_in));
- addr.sin_family = p->family;
- memcpy (&ifreq.ifr_addr, &addr, sizeof (struct sockaddr_in));
- ret = if_ioctl (SIOCSIFADDR, (caddr_t) &ifreq);
- if (ret < 0)
- return ret;
- return 0;
- }
- #endif /* HAVE_IFALIASREQ */
- #endif /* HAVE_NETLINK */
- /* get interface flags */
- void
- if_get_flags (struct interface *ifp)
- {
- int ret;
- struct ifreq ifreq;
- ifreq_set_name (&ifreq, ifp);
- ret = if_ioctl (SIOCGIFFLAGS, (caddr_t) &ifreq);
- if (ret < 0)
- {
- perror ("ioctl");
- return;
- }
- ifp->flags = ifreq.ifr_flags & 0x0000ffff;
- }
- /* Set interface flags */
- int
- if_set_flags (struct interface *ifp, unsigned long flags)
- {
- int ret;
- struct ifreq ifreq;
- ifreq_set_name (&ifreq, ifp);
- ifreq.ifr_flags = ifp->flags;
- ifreq.ifr_flags |= flags;
- ret = if_ioctl (SIOCSIFFLAGS, (caddr_t) &ifreq);
- if (ret < 0)
- {
- zlog_info ("can't set interface flags");
- return ret;
- }
- return 0;
- }
- /* Unset interface's flag. */
- int
- if_unset_flags (struct interface *ifp, unsigned long flags)
- {
- int ret;
- struct ifreq ifreq;
- ifreq_set_name (&ifreq, ifp);
- ifreq.ifr_flags = ifp->flags;
- ifreq.ifr_flags &= ~flags;
- ret = if_ioctl (SIOCSIFFLAGS, (caddr_t) &ifreq);
- if (ret < 0)
- {
- zlog_info ("can't unset interface flags");
- return ret;
- }
- return 0;
- }
- #ifdef HAVE_IPV6
- #ifdef LINUX_IPV6
- #ifndef _LINUX_IN6_H
- /* linux/include/net/ipv6.h */
- struct in6_ifreq
- {
- struct in6_addr ifr6_addr;
- u_int32_t ifr6_prefixlen;
- int ifr6_ifindex;
- };
- #endif /* _LINUX_IN6_H */
- /* Interface's address add/delete functions. */
- int
- if_prefix_add_ipv6 (struct interface *ifp, struct connected *ifc)
- {
- int ret;
- struct prefix_ipv6 *p;
- struct in6_ifreq ifreq;
- p = (struct prefix_ipv6 *) ifc->address;
- memset (&ifreq, 0, sizeof (struct in6_ifreq));
- memcpy (&ifreq.ifr6_addr, &p->prefix, sizeof (struct in6_addr));
- ifreq.ifr6_ifindex = ifp->ifindex;
- ifreq.ifr6_prefixlen = p->prefixlen;
- ret = if_ioctl_ipv6 (SIOCSIFADDR, (caddr_t) &ifreq);
- return ret;
- }
- int
- if_prefix_delete_ipv6 (struct interface *ifp, struct connected *ifc)
- {
- int ret;
- struct prefix_ipv6 *p;
- struct in6_ifreq ifreq;
- p = (struct prefix_ipv6 *) ifc->address;
- memset (&ifreq, 0, sizeof (struct in6_ifreq));
- memcpy (&ifreq.ifr6_addr, &p->prefix, sizeof (struct in6_addr));
- ifreq.ifr6_ifindex = ifp->ifindex;
- ifreq.ifr6_prefixlen = p->prefixlen;
- ret = if_ioctl_ipv6 (SIOCDIFADDR, (caddr_t) &ifreq);
- return ret;
- }
- #else /* LINUX_IPV6 */
- #ifdef HAVE_IN6_ALIASREQ
- int
- if_prefix_add_ipv6 (struct interface *ifp, struct connected *ifc)
- {
- int ret;
- struct in6_aliasreq addreq;
- struct sockaddr_in6 addr;
- struct sockaddr_in6 mask;
- struct prefix_ipv6 *p;
- p = (struct prefix_ipv6 * ) ifc->address;
- bzero (&addreq, sizeof addreq);
- strncpy ((char *)&addreq.ifra_name, ifp->name, sizeof addreq.ifra_name);
- bzero (&addr, sizeof (struct sockaddr_in6));
- addr.sin6_addr = p->prefix;
- addr.sin6_family = p->family;
- #ifdef HAVE_SIN_LEN
- addr.sin6_len = sizeof (struct sockaddr_in6);
- #endif
- memcpy (&addreq.ifra_addr, &addr, sizeof (struct sockaddr_in6));
- bzero (&mask, sizeof (struct sockaddr_in6));
- masklen2ip6 (p->prefixlen, &mask.sin6_addr);
- mask.sin6_family = p->family;
- #ifdef HAVE_SIN_LEN
- mask.sin6_len = sizeof (struct sockaddr_in6);
- #endif
- memcpy (&addreq.ifra_prefixmask, &mask, sizeof (struct sockaddr_in6));
-
- ret = if_ioctl_ipv6 (SIOCAIFADDR_IN6, (caddr_t) &addreq);
- if (ret < 0)
- return ret;
- return 0;
- }
- int
- if_prefix_delete_ipv6 (struct interface *ifp, struct connected *ifc)
- {
- int ret;
- struct in6_aliasreq addreq;
- struct sockaddr_in6 addr;
- struct sockaddr_in6 mask;
- struct prefix_ipv6 *p;
- p = (struct prefix_ipv6 *) ifc->address;
- bzero (&addreq, sizeof addreq);
- strncpy ((char *)&addreq.ifra_name, ifp->name, sizeof addreq.ifra_name);
- bzero (&addr, sizeof (struct sockaddr_in6));
- addr.sin6_addr = p->prefix;
- addr.sin6_family = p->family;
- #ifdef HAVE_SIN_LEN
- addr.sin6_len = sizeof (struct sockaddr_in6);
- #endif
- memcpy (&addreq.ifra_addr, &addr, sizeof (struct sockaddr_in6));
- bzero (&mask, sizeof (struct sockaddr_in6));
- masklen2ip6 (p->prefixlen, &mask.sin6_addr);
- mask.sin6_family = p->family;
- #ifdef HAVE_SIN_LEN
- mask.sin6_len = sizeof (struct sockaddr_in6);
- #endif
- memcpy (&addreq.ifra_prefixmask, &mask, sizeof (struct sockaddr_in6));
-
- ret = if_ioctl_ipv6 (SIOCDIFADDR_IN6, (caddr_t) &addreq);
- if (ret < 0)
- return ret;
- return 0;
- }
- #else
- int
- if_prefix_add_ipv6 (struct interface *ifp, struct connected *ifc)
- {
- return 0;
- }
- int
- if_prefix_delete_ipv6 (struct interface *ifp, struct connected *ifc)
- {
- return 0;
- }
- #endif /* HAVE_IN6_ALIASREQ */
- #endif /* LINUX_IPV6 */
- #endif /* HAVE_IPV6 */