diff options
author | jkh <jkh@FreeBSD.org> | 1996-10-17 18:42:33 +0000 |
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committer | jkh <jkh@FreeBSD.org> | 1996-10-17 18:42:33 +0000 |
commit | 53410b6ff1ac5ed2ff0aa1a7fd0858dfbecf0e80 (patch) | |
tree | 1b83462872ff55f51ed7439f97fec9076ac9e96a /sys/netns/ns.c | |
parent | 389ebaa4bfce63608aa7efa5d9130002ccfe764e (diff) | |
download | FreeBSD-src-53410b6ff1ac5ed2ff0aa1a7fd0858dfbecf0e80.zip FreeBSD-src-53410b6ff1ac5ed2ff0aa1a7fd0858dfbecf0e80.tar.gz |
Bring back netns so that Netcon can take over support for it, as agreed.
This was actually easier than I thought - CVS is smart enough to handle
"resurrections" now. :-)
Diffstat (limited to 'sys/netns/ns.c')
-rw-r--r-- | sys/netns/ns.c | 370 |
1 files changed, 370 insertions, 0 deletions
diff --git a/sys/netns/ns.c b/sys/netns/ns.c new file mode 100644 index 0000000..402f6b7 --- /dev/null +++ b/sys/netns/ns.c @@ -0,0 +1,370 @@ +/* + * Copyright (c) 1984, 1985, 1986, 1987, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)ns.c 8.2 (Berkeley) 11/15/93 + * $Id: ns.c,v 1.4 1995/05/30 08:12:21 rgrimes Exp $ + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/mbuf.h> +#include <sys/ioctl.h> +#include <sys/protosw.h> +#include <sys/errno.h> +#include <sys/socket.h> +#include <sys/socketvar.h> + +#include <net/if.h> +#include <net/route.h> + +#include <netns/ns.h> +#include <netns/ns_if.h> + +#ifdef NS + +struct ns_ifaddr *ns_ifaddr; +int ns_interfaces; +extern struct sockaddr_ns ns_netmask, ns_hostmask; + +/* + * Generic internet control operations (ioctl's). + */ +/* ARGSUSED */ +ns_control(so, cmd, data, ifp) + struct socket *so; + int cmd; + caddr_t data; + register struct ifnet *ifp; +{ + register struct ifreq *ifr = (struct ifreq *)data; + register struct ns_aliasreq *ifra = (struct ns_aliasreq *)data; + register struct ns_ifaddr *ia; + struct ifaddr *ifa; + struct ns_ifaddr *oia; + int error, dstIsNew, hostIsNew; + + /* + * Find address for this interface, if it exists. + */ + if (ifp == 0) + return (EADDRNOTAVAIL); + for (ia = ns_ifaddr; ia; ia = ia->ia_next) + if (ia->ia_ifp == ifp) + break; + + switch (cmd) { + + case SIOCGIFADDR: + if (ia == (struct ns_ifaddr *)0) + return (EADDRNOTAVAIL); + *(struct sockaddr_ns *)&ifr->ifr_addr = ia->ia_addr; + return (0); + + + case SIOCGIFBRDADDR: + if (ia == (struct ns_ifaddr *)0) + return (EADDRNOTAVAIL); + if ((ifp->if_flags & IFF_BROADCAST) == 0) + return (EINVAL); + *(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_broadaddr; + return (0); + + case SIOCGIFDSTADDR: + if (ia == (struct ns_ifaddr *)0) + return (EADDRNOTAVAIL); + if ((ifp->if_flags & IFF_POINTOPOINT) == 0) + return (EINVAL); + *(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_dstaddr; + return (0); + } + + if ((so->so_state & SS_PRIV) == 0) + return (EPERM); + + switch (cmd) { + case SIOCAIFADDR: + case SIOCDIFADDR: + if (ifra->ifra_addr.sns_family == AF_NS) + for (oia = ia; ia; ia = ia->ia_next) { + if (ia->ia_ifp == ifp && + ns_neteq(ia->ia_addr.sns_addr, + ifra->ifra_addr.sns_addr)) + break; + } + if (cmd == SIOCDIFADDR && ia == 0) + return (EADDRNOTAVAIL); + /* FALLTHROUGH */ + + case SIOCSIFADDR: + case SIOCSIFDSTADDR: + if (ia == (struct ns_ifaddr *)0) { + oia = (struct ns_ifaddr *) + malloc(sizeof *ia, M_IFADDR, M_WAITOK); + if (oia == (struct ns_ifaddr *)NULL) + return (ENOBUFS); + bzero((caddr_t)oia, sizeof(*oia)); + if (ia = ns_ifaddr) { + for ( ; ia->ia_next; ia = ia->ia_next) + ; + ia->ia_next = oia; + } else + ns_ifaddr = oia; + ia = oia; + if (ifa = ifp->if_addrlist) { + for ( ; ifa->ifa_next; ifa = ifa->ifa_next) + ; + ifa->ifa_next = (struct ifaddr *) ia; + } else + ifp->if_addrlist = (struct ifaddr *) ia; + ia->ia_ifp = ifp; + ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; + + ia->ia_ifa.ifa_netmask = + (struct sockaddr *)&ns_netmask; + + ia->ia_ifa.ifa_dstaddr = + (struct sockaddr *)&ia->ia_dstaddr; + if (ifp->if_flags & IFF_BROADCAST) { + ia->ia_broadaddr.sns_family = AF_NS; + ia->ia_broadaddr.sns_len = sizeof(ia->ia_addr); + ia->ia_broadaddr.sns_addr.x_host = ns_broadhost; + } + ns_interfaces++; + } + } + + switch (cmd) { + int error; + + case SIOCSIFDSTADDR: + if ((ifp->if_flags & IFF_POINTOPOINT) == 0) + return (EINVAL); + if (ia->ia_flags & IFA_ROUTE) { + rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST); + ia->ia_flags &= ~IFA_ROUTE; + } + if (ifp->if_ioctl) { + error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, ia); + if (error) + return (error); + } + *(struct sockaddr *)&ia->ia_dstaddr = ifr->ifr_dstaddr; + return (0); + + case SIOCSIFADDR: + return (ns_ifinit(ifp, ia, + (struct sockaddr_ns *)&ifr->ifr_addr, 1)); + + case SIOCDIFADDR: + ns_ifscrub(ifp, ia); + if ((ifa = ifp->if_addrlist) == (struct ifaddr *)ia) + ifp->if_addrlist = ifa->ifa_next; + else { + while (ifa->ifa_next && + (ifa->ifa_next != (struct ifaddr *)ia)) + ifa = ifa->ifa_next; + if (ifa->ifa_next) + ifa->ifa_next = ((struct ifaddr *)ia)->ifa_next; + else + printf("Couldn't unlink nsifaddr from ifp\n"); + } + oia = ia; + if (oia == (ia = ns_ifaddr)) { + ns_ifaddr = ia->ia_next; + } else { + while (ia->ia_next && (ia->ia_next != oia)) { + ia = ia->ia_next; + } + if (ia->ia_next) + ia->ia_next = oia->ia_next; + else + printf("Didn't unlink nsifadr from list\n"); + } + IFAFREE((&oia->ia_ifa)); + if (0 == --ns_interfaces) { + /* + * We reset to virginity and start all over again + */ + ns_thishost = ns_zerohost; + } + return (0); + + case SIOCAIFADDR: + dstIsNew = 0; hostIsNew = 1; + if (ia->ia_addr.sns_family == AF_NS) { + if (ifra->ifra_addr.sns_len == 0) { + ifra->ifra_addr = ia->ia_addr; + hostIsNew = 0; + } else if (ns_neteq(ifra->ifra_addr.sns_addr, + ia->ia_addr.sns_addr)) + hostIsNew = 0; + } + if ((ifp->if_flags & IFF_POINTOPOINT) && + (ifra->ifra_dstaddr.sns_family == AF_NS)) { + if (hostIsNew == 0) + ns_ifscrub(ifp, ia); + ia->ia_dstaddr = ifra->ifra_dstaddr; + dstIsNew = 1; + } + if (ifra->ifra_addr.sns_family == AF_NS && + (hostIsNew || dstIsNew)) + error = ns_ifinit(ifp, ia, &ifra->ifra_addr, 0); + return (error); + + default: + if (ifp->if_ioctl == 0) + return (EOPNOTSUPP); + return ((*ifp->if_ioctl)(ifp, cmd, data)); + } +} + +/* +* Delete any previous route for an old address. +*/ +ns_ifscrub(ifp, ia) + register struct ifnet *ifp; + register struct ns_ifaddr *ia; +{ + if (ia->ia_flags & IFA_ROUTE) { + if (ifp->if_flags & IFF_POINTOPOINT) { + rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST); + } else + rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0); + ia->ia_flags &= ~IFA_ROUTE; + } +} +/* + * Initialize an interface's internet address + * and routing table entry. + */ +ns_ifinit(ifp, ia, sns, scrub) + register struct ifnet *ifp; + register struct ns_ifaddr *ia; + register struct sockaddr_ns *sns; +{ + struct sockaddr_ns oldaddr; + register union ns_host *h = &ia->ia_addr.sns_addr.x_host; + int s = splimp(), error; + + /* + * Set up new addresses. + */ + oldaddr = ia->ia_addr; + ia->ia_addr = *sns; + /* + * The convention we shall adopt for naming is that + * a supplied address of zero means that "we don't care". + * if there is a single interface, use the address of that + * interface as our 6 byte host address. + * if there are multiple interfaces, use any address already + * used. + * + * Give the interface a chance to initialize + * if this is its first address, + * and to validate the address if necessary. + */ + if (ns_hosteqnh(ns_thishost, ns_zerohost)) { + if (ifp->if_ioctl && + (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) { + ia->ia_addr = oldaddr; + splx(s); + return (error); + } + ns_thishost = *h; + } else if (ns_hosteqnh(sns->sns_addr.x_host, ns_zerohost) + || ns_hosteqnh(sns->sns_addr.x_host, ns_thishost)) { + *h = ns_thishost; + if (ifp->if_ioctl && + (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) { + ia->ia_addr = oldaddr; + splx(s); + return (error); + } + if (!ns_hosteqnh(ns_thishost,*h)) { + ia->ia_addr = oldaddr; + splx(s); + return (EINVAL); + } + } else { + ia->ia_addr = oldaddr; + splx(s); + return (EINVAL); + } + ia->ia_ifa.ifa_metric = ifp->if_metric; + /* + * Add route for the network. + */ + if (scrub) { + ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr; + ns_ifscrub(ifp, ia); + ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; + } + if (ifp->if_flags & IFF_POINTOPOINT) + rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP); + else { + ia->ia_broadaddr.sns_addr.x_net = ia->ia_addr.sns_addr.x_net; + rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP); + } + ia->ia_flags |= IFA_ROUTE; + return (0); +} + +/* + * Return address info for specified internet network. + */ +struct ns_ifaddr * +ns_iaonnetof(dst) + register struct ns_addr *dst; +{ + register struct ns_ifaddr *ia; + register struct ns_addr *compare; + register struct ifnet *ifp; + struct ns_ifaddr *ia_maybe = 0; + union ns_net net = dst->x_net; + + for (ia = ns_ifaddr; ia; ia = ia->ia_next) { + if (ifp = ia->ia_ifp) { + if (ifp->if_flags & IFF_POINTOPOINT) { + compare = &satons_addr(ia->ia_dstaddr); + if (ns_hosteq(*dst, *compare)) + return (ia); + if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net)) + ia_maybe = ia; + } else { + if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net)) + return (ia); + } + } + } + return (ia_maybe); +} +#endif |