diff options
| author |   claudio <claudio@openbsd.org> | 2018-02-10 05:32:21 +0000 |
|---|---|---|
| committer | claudio <claudio@openbsd.org> | 2018-02-10 05:32:21 +0000 |
| commit | d62081b6dd05a67ee176092f85ee96e83eb74a19 (patch) | |
| tree | bd440ed013a8669b781bbb2ec79eba37b019fb08 /sys/netinet/in.c | |
| parent | Syncronize filesystems to disk when suspending. Each mountpoint's vnodes (diff) | |
| download | wireguard-openbsd-d62081b6dd05a67ee176092f85ee96e83eb74a19.tar.xz wireguard-openbsd-d62081b6dd05a67ee176092f85ee96e83eb74a19.zip | |
Similar to the IPv6 case create 127.0.0.1/8 on lo(4) interfaces which act
as loopback interfaces for each rdomain (including lo0). This is done when
the interface is brought up. This is now also done by default (either on
attach of lo0 or when creating the rdomain).
OK mpi@
Diffstat (limited to 'sys/netinet/in.c')
| -rw-r--r-- | sys/netinet/in.c | 58 |
1 files changed, 57 insertions, 1 deletions
diff --git a/sys/netinet/in.c b/sys/netinet/in.c index 5681667a688..3651c120af8 100644 --- a/sys/netinet/in.c +++ b/sys/netinet/in.c @@ -1,4 +1,4 @@ -/* $OpenBSD: in.c,v 1.144 2017/11/04 13:11:54 mpi Exp $ */ +/* $OpenBSD: in.c,v 1.145 2018/02/10 05:32:21 claudio Exp $ */ /* $NetBSD: in.c,v 1.26 1996/02/13 23:41:39 christos Exp $ */ /* @@ -609,6 +609,62 @@ in_broadcast(struct in_addr in, u_int rtableid) #undef ia } +int +in_up_loopback(struct ifnet *ifp) +{ + struct in_ifaddr *ia; + struct rt_addrinfo info; + int error; + + if ((ifp->if_flags & IFF_LOOPBACK) == 0) + return (0); + + /* configure 127.0.0.1 on the loopback interface */ + ia = malloc(sizeof *ia, M_IFADDR, M_WAITOK | M_ZERO); + ia->ia_addr.sin_family = AF_INET; + ia->ia_addr.sin_len = sizeof(ia->ia_addr); + ia->ia_addr.sin_addr.s_addr = INADDR_LOOPBACK; + ia->ia_ifa.ifa_addr = sintosa(&ia->ia_addr); + ia->ia_ifa.ifa_dstaddr = sintosa(&ia->ia_dstaddr); + ia->ia_ifa.ifa_netmask = sintosa(&ia->ia_sockmask); + ia->ia_netmask = IN_CLASSA_NET; + ia->ia_sockmask.sin_len = 8; + ia->ia_sockmask.sin_addr.s_addr = ia->ia_netmask; + ia->ia_ifp = ifp; + + if (ifaof_ifpforaddr(ia->ia_ifa.ifa_addr, ifp) != NULL) { + free(ia, M_IFADDR, sizeof *ia); + return (0); + } + + /* + * Add the address to the local list and the global tree. If an + * error occured, cleanup. + */ + ifa_add(ifp, &ia->ia_ifa); + error = rt_ifa_addlocal(&ia->ia_ifa); + if (error) + goto out; + + ia->ia_net = ia->ia_addr.sin_addr.s_addr & ia->ia_netmask; + in_socktrim(&ia->ia_sockmask); + + /* Now insert a reject route for 127.0.0.0/8 */ + bzero((caddr_t)&info, sizeof(info)); + info.rti_flags = RTF_GATEWAY | RTF_REJECT | RTF_STATIC; + info.rti_ifa = &ia->ia_ifa; + info.rti_info[RTAX_DST] = ia->ia_ifa.ifa_addr; + info.rti_info[RTAX_NETMASK] = ia->ia_ifa.ifa_netmask; + info.rti_info[RTAX_GATEWAY] = ia->ia_ifa.ifa_addr; + + error = rtrequest(RTM_ADD, &info, 0, NULL, ifp->if_rdomain); + +out: + if (error) + in_purgeaddr(&ia->ia_ifa); + return (error); +} + /* * Add an address to the list of IP multicast addresses for a given interface. */ |