diff options
Diffstat (limited to 'sys/netinet/raw_ip.c')
| -rw-r--r-- | sys/netinet/raw_ip.c | 64 |
1 files changed, 63 insertions, 1 deletions
diff --git a/sys/netinet/raw_ip.c b/sys/netinet/raw_ip.c index c5382e0..0011ab2 100644 --- a/sys/netinet/raw_ip.c +++ b/sys/netinet/raw_ip.c @@ -31,7 +31,7 @@ * SUCH DAMAGE. * * @(#)raw_ip.c 8.7 (Berkeley) 5/15/95 - * $FreeBSD$ + * $Id$ */ #include <sys/param.h> @@ -314,6 +314,68 @@ rip_ctloutput(op, so, level, optname, m) return (ip_ctloutput(op, so, level, optname, m)); } +/* + * This function exists solely to receive the PRC_IFDOWN messages which + * are sent by if_down(). It looks for an ifaddr whose ifa_addr is sa, + * and calls in_ifadown() to remove all routes corresponding to that address. + * It also receives the PRC_IFUP messages from if_up() and reinstalls the + * interface routes. + */ +void +rip_ctlinput(cmd, sa, vip) + int cmd; + struct sockaddr *sa; + void *vip; +{ + struct in_ifaddr *ia; + struct ifnet *ifp; + int err; + int flags; + + switch(cmd) { + case PRC_IFDOWN: + for (ia = in_ifaddrhead.tqh_first; ia; + ia = ia->ia_link.tqe_next) { + if (ia->ia_ifa.ifa_addr == sa + && (ia->ia_flags & IFA_ROUTE)) { + /* + * in_ifscrub kills the interface route. + */ + in_ifscrub(ia->ia_ifp, ia); + /* + * in_ifadown gets rid of all the rest of + * the routes. This is not quite the right + * thing to do, but at least if we are running + * a routing process they will come back. + */ + in_ifadown(&ia->ia_ifa); + break; + } + } + break; + + case PRC_IFUP: + for (ia = in_ifaddrhead.tqh_first; ia; + ia = ia->ia_link.tqe_next) { + if (ia->ia_ifa.ifa_addr == sa) + break; + } + if (ia == 0 || (ia->ia_flags & IFA_ROUTE)) + return; + flags = RTF_UP; + ifp = ia->ia_ifa.ifa_ifp; + + if ((ifp->if_flags & IFF_LOOPBACK) + || (ifp->if_flags & IFF_POINTOPOINT)) + flags |= RTF_HOST; + + err = rtinit(&ia->ia_ifa, RTM_ADD, flags); + if (err == 0) + ia->ia_flags |= IFA_ROUTE; + break; + } +} + static u_long rip_sendspace = RIPSNDQ; /* XXX sysctl ? */ static u_long rip_recvspace = RIPRCVQ; /* XXX sysctl ? */ |
