diff options
Diffstat (limited to 'sbin')
| -rw-r--r-- | sbin/ifconfig/ifconfig.8 | 10 | ||||
| -rw-r--r-- | sbin/ifconfig/ifconfig.c | 27 |
2 files changed, 36 insertions, 1 deletions
diff --git a/sbin/ifconfig/ifconfig.8 b/sbin/ifconfig/ifconfig.8 index cd0c6c6..e564010 100644 --- a/sbin/ifconfig/ifconfig.8 +++ b/sbin/ifconfig/ifconfig.8 @@ -189,6 +189,16 @@ This action does not automatically disable routes using the interface. .\" IP encapsulation of .\" .Tn CLNP .\" packets is done differently. +.It Cm lladdr Ar addr +Set the link-level address on an interface. This can be used to +e.g. set a new MAC address on an ethernet interface, though the +mechanism used is not ethernet-specific. The address +.Ar addr +is specified as a series of colon-separated hex digits. +If the interface is already +up when this option is used, it will be briefly brought down and +then brought back up again in order to insure that the receive +filter in the underlying ethernet hardware is properly reprogrammed. .It Cm media Ar type If the driver supports the media selection system, set the media type of the interface to diff --git a/sbin/ifconfig/ifconfig.c b/sbin/ifconfig/ifconfig.c index a3c75ca..52d403d 100644 --- a/sbin/ifconfig/ifconfig.c +++ b/sbin/ifconfig/ifconfig.c @@ -53,6 +53,7 @@ static const char rcsid[] = #include <sys/module.h> #include <sys/linker.h> +#include <net/ethernet.h> #include <net/if.h> #include <net/if_var.h> #include <net/if_dl.h> @@ -153,7 +154,7 @@ c_func setifprefixlen; c_func setip6flags; #endif c_func setifipdst; -c_func setifflags, setifmetric, setifmtu; +c_func setifflags, setifmetric, setifmtu, setiflladdr; #define NEXTARG 0xffffff @@ -212,6 +213,7 @@ struct cmd { { "compress", IFF_LINK0, setifflags }, { "noicmp", IFF_LINK1, setifflags }, { "mtu", NEXTARG, setifmtu }, + { "lladdr", NEXTARG, setiflladdr }, { 0, 0, setifaddr }, { 0, 0, setifdstaddr }, }; @@ -815,6 +817,29 @@ setifmtu(val, dummy, s, afp) warn("ioctl (set mtu)"); } +void +setiflladdr(val, dummy, s, afp) + const char *val; + int dummy __unused; + int s; + const struct afswtch *afp; +{ + struct ether_addr *ea; + + ea = ether_aton(val); + if (ea == NULL) { + warn("malformed link-level address"); + return; + } + strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); + ifr.ifr_addr.sa_len = ETHER_ADDR_LEN; + ifr.ifr_addr.sa_family = AF_LINK; + bcopy(ea, ifr.ifr_addr.sa_data, ETHER_ADDR_LEN); + if (ioctl(s, SIOCSIFLLADDR, (caddr_t)&ifr) < 0) + warn("ioctl (set lladdr)"); + + return; +} #define IFFBITS \ "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \ |
