diff options
Diffstat (limited to 'sys/net/if.c')
| -rw-r--r-- | sys/net/if.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/sys/net/if.c b/sys/net/if.c index 982592df8463..829ede27b94d 100644 --- a/sys/net/if.c +++ b/sys/net/if.c @@ -52,7 +52,9 @@ #include <sys/sysctl.h> #include <net/if.h> +#include <net/if_arp.h> #include <net/if_dl.h> +#include <net/if_types.h> #include <net/radix.h> #include <net/route.h> @@ -910,6 +912,13 @@ ifioctl(so, cmd, data, p) return (EOPNOTSUPP); return ((*ifp->if_ioctl)(ifp, cmd, data)); + case SIOCSIFLLADDR: + error = suser(p); + if (error) + return (error); + return if_setlladdr(ifp, + ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len); + default: oif_flags = ifp->if_flags; if (so->so_proto == 0) @@ -1309,6 +1318,52 @@ if_delmulti(ifp, sa) return 0; } +/* + * Set the link layer address on an interface. + * + * At this time we only support certain types of interfaces, + * and we don't allow the length of the address to change. + */ +int +if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) +{ + struct sockaddr_dl *sdl; + struct ifaddr *ifa; + + ifa = ifnet_addrs[ifp->if_index - 1]; + if (ifa == NULL) + return (EINVAL); + sdl = (struct sockaddr_dl *)ifa->ifa_addr; + if (sdl == NULL) + return (EINVAL); + if (len != sdl->sdl_alen) /* don't allow length to change */ + return (EINVAL); + switch (ifp->if_type) { + case IFT_ETHER: /* these types use struct arpcom */ + case IFT_FDDI: + case IFT_XETHER: + case IFT_ISO88025: + case IFT_PROPVIRTUAL: /* XXX waiting for IFT_8021_VLAN */ + bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len); + bcopy(lladdr, LLADDR(sdl), len); + break; + default: + return (ENODEV); + } + /* + * If the interface is already up, we need + * to re-init it in order to reprogram its + * address filter. + */ + if ((ifp->if_flags & IFF_UP) != 0) { + ifp->if_flags &= ~IFF_UP; + (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, NULL); + ifp->if_flags |= IFF_UP; + (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, NULL); + } + return (0); +} + struct ifmultiaddr * ifmaof_ifpforaddr(sa, ifp) struct sockaddr *sa; |