static void
configure_interface1(struct interface *ifp)
{
struct if_options *ifo = ifp->options;
int ra_global, ra_iface;
/* Do any platform specific configuration */
if_conf(ifp);
if (ifp->flags & IFF_POINTOPOINT && !(ifo->options & DHCPCD_INFORM))
ifo->options |= DHCPCD_STATIC;
if (ifp->flags & IFF_NOARP ||
ifo->options & (DHCPCD_INFORM | DHCPCD_STATIC))
ifo->options &= ~(DHCPCD_ARP | DHCPCD_IPV4LL);
if (!(ifp->flags & (IFF_POINTOPOINT | IFF_LOOPBACK | IFF_MULTICAST)))
ifo->options &= ~DHCPCD_IPV6RS;
if (ifo->options & DHCPCD_LINK && carrier_status(ifp) == LINK_UNKNOWN)
ifo->options &= ~DHCPCD_LINK;
if (ifo->metric != -1)
ifp->metric = ifo->metric;
/* We want to disable kernel interface RA as early as possible. */
if (ifo->options & DHCPCD_IPV6RS) {
ra_global = check_ipv6(NULL, options & DHCPCD_IPV6RA_OWN ? 1:0);
ra_iface = check_ipv6(ifp->name,
ifp->options->options & DHCPCD_IPV6RA_OWN ? 1 : 0);
if (ra_global == -1 || ra_iface == -1)
ifo->options &= ~DHCPCD_IPV6RS;
else if (ra_iface == 0)
ifo->options |= DHCPCD_IPV6RA_OWN;
}
/* If we haven't specified a ClientID and our hardware address
* length is greater than DHCP_CHADDR_LEN then we enforce a ClientID
* of the hardware address family and the hardware address. */
if (ifp->hwlen > DHCP_CHADDR_LEN)
ifo->options |= DHCPCD_CLIENTID;
/* Firewire and InfiniBand interfaces require ClientID and
* the broadcast option being set. */
switch (ifp->family) {
case ARPHRD_IEEE1394: /* FALLTHROUGH */
case ARPHRD_INFINIBAND:
ifo->options |= DHCPCD_CLIENTID | DHCPCD_BROADCAST;
break;
}
}
static void
configure_interface1(struct interface *ifp)
{
struct if_options *ifo = ifp->options;
int ra_global, ra_iface;
/* Do any platform specific configuration */
if_conf(ifp);
if (ifp->flags & IFF_POINTOPOINT && !(ifo->options & DHCPCD_INFORM))
ifo->options |= DHCPCD_STATIC;
if (ifp->flags & IFF_NOARP ||
ifo->options & (DHCPCD_INFORM | DHCPCD_STATIC))
ifo->options &= ~(DHCPCD_ARP | DHCPCD_IPV4LL);
if (!(ifp->flags & (IFF_POINTOPOINT | IFF_LOOPBACK | IFF_MULTICAST)))
ifo->options &= ~DHCPCD_IPV6RS;
if (ifo->options & DHCPCD_LINK && carrier_status(ifp) == LINK_UNKNOWN)
ifo->options &= ~DHCPCD_LINK;
if (ifo->metric != -1)
ifp->metric = ifo->metric;
if (!(ifo->options & DHCPCD_IPV6))
ifo->options &= ~DHCPCD_IPV6RS;
/* We want to disable kernel interface RA as early as possible. */
if (ifo->options & DHCPCD_IPV6RS) {
ra_global = check_ipv6(NULL, options & DHCPCD_IPV6RA_OWN ? 1:0);
ra_iface = check_ipv6(ifp->name,
ifp->options->options & DHCPCD_IPV6RA_OWN ? 1 : 0);
if (ra_global == -1 || ra_iface == -1)
ifo->options &= ~DHCPCD_IPV6RS;
else if (ra_iface == 0)
ifo->options |= DHCPCD_IPV6RA_OWN;
}
/* If we haven't specified a ClientID and our hardware address
* length is greater than DHCP_CHADDR_LEN then we enforce a ClientID
* of the hardware address family and the hardware address. */
if (ifp->hwlen > DHCP_CHADDR_LEN)
ifo->options |= DHCPCD_CLIENTID;
/* Firewire and InfiniBand interfaces require ClientID and
* the broadcast option being set. */
switch (ifp->family) {
case ARPHRD_IEEE1394: /* FALLTHROUGH */
case ARPHRD_INFINIBAND:
ifo->options |= DHCPCD_CLIENTID | DHCPCD_BROADCAST;
break;
}
if (!(ifo->options & DHCPCD_IAID)) {
/*
* An IAID is for identifying a unqiue interface within
* the client. It is 4 bytes long. Working out a default
* value is problematic.
*
* Interface name and number are not stable
* between different OS's. Some OS's also cannot make
* up their mind what the interface should be called
* (yes, udev, I'm looking at you).
* Also, the name could be longer than 4 bytes.
* Also, with pluggable interfaces the name and index
* could easily get swapped per actual interface.
*
* The MAC address is 6 bytes long, the final 3
* being unique to the manufacturer and the initial 3
* being unique to the organisation which makes it.
* We could use the last 4 bytes of the MAC address
* as the IAID as it's the most stable part given the
* above, but equally it's not guaranteed to be
* unique.
*
* Given the above, and our need to reliably work
* between reboots without persitent storage,
* generating the IAID from the MAC address is the only
* logical default.
*
* dhclient uses the last 4 bytes of the MAC address.
* dibbler uses an increamenting counter.
* wide-dhcpv6 uses 0 or a configured value.
* odhcp6c uses 1.
* Windows 7 uses the first 3 bytes of the MAC address
* and an unknown byte.
* dhcpcd-6.1.0 and earlier used the interface name,
* falling back to interface index if name > 4.
*/
memcpy(ifo->iaid, ifp->hwaddr + ifp->hwlen - sizeof(ifo->iaid),
sizeof(ifo->iaid));
#if 0
len = strlen(ifp->name);
if (len <= sizeof(ifo->iaid)) {
memcpy(ifo->iaid, ifp->name, len);
memset(ifo->iaid + len, 0, sizeof(ifo->iaid) - len);
} else {
/* IAID is the same size as a uint32_t */
len = htonl(ifp->index);
memcpy(ifo->iaid, &len, sizeof(len));
}
#endif
ifo->options |= DHCPCD_IAID;
}
#ifdef INET6
if (ifo->ia == NULL && ifo->options & DHCPCD_IPV6) {
ifo->ia = malloc(sizeof(*ifo->ia));
if (ifo->ia == NULL)
syslog(LOG_ERR, "%s: %m", __func__);
else {
if (ifo->ia_type == 0)
ifo->ia_type = D6_OPTION_IA_NA;
memcpy(ifo->ia->iaid, ifo->iaid, sizeof(ifo->iaid));
ifo->ia_len = 1;
ifo->ia->sla = NULL;
ifo->ia->sla_len = 0;
}
}
#endif
}