static void
trie_node_format(struct f_trie_node *t, buffer *buf)
{
if (t == NULL)
return;
if (ipa_nonzero(t->accept))
buffer_print(buf, "%I/%d{%I}, ", t->addr, t->plen, t->accept);
trie_node_format(t->c[0], buf);
trie_node_format(t->c[1], buf);
}
static void
trie_node_print(struct f_trie_node *t, char **sep)
{
if (t == NULL)
return;
if (ipa_nonzero(t->accept))
{
logn("%s%I/%d{%I}", *sep, t->addr, t->plen, t->accept);
*sep = ", ";
}
trie_node_print(t->c[0], sep);
trie_node_print(t->c[1], sep);
}
static void
scan_ifs(struct ifreq *r, int cnt)
{
struct iface i, *pi;
struct ifa a;
char *err, *colon;
unsigned fl;
ip_addr netmask;
int l, scope;
sockaddr *sa;
if_start_update();
for (cnt /= sizeof(struct ifreq); cnt; cnt--, r++)
{
int sec = 0;
bzero(&i, sizeof(i));
bzero(&a, sizeof(a));
if (colon = strchr(r->ifr_name, ':'))
{
/* It's an alias -- let's interpret it as a secondary interface address */
sec = 1;
*colon = 0;
}
strncpy(i.name, r->ifr_name, sizeof(i.name) - 1);
if(ioctl(if_scan_sock, SIOCGIFADDR,r)<0) continue;
get_sockaddr((struct sockaddr_in *) &r->ifr_addr, &a.ip, NULL, 1);
if (ipa_nonzero(a.ip))
{
l = ipa_classify(a.ip);
if (l < 0 || !(l & IADDR_HOST))
{
log(L_ERR "%s: Invalid interface address", i.name);
a.ip = IPA_NONE;
}
else
{
a.scope = l & IADDR_SCOPE_MASK;
if (a.scope == SCOPE_HOST)
i.flags |= IF_LOOPBACK | IF_IGNORE;
}
}
if (ioctl(if_scan_sock, SIOCGIFFLAGS, r) < 0)
{
err = "SIOCGIFFLAGS";
faulty:
log(L_ERR "%s(%s): %m", err, i.name);
bad:
i.flags = (i.flags & ~IF_LINK_UP) | IF_ADMIN_DOWN;
continue;
}
fl = r->ifr_flags;
if (fl & IFF_UP)
i.flags |= IF_LINK_UP;
if (ioctl(if_scan_sock, SIOCGIFNETMASK, r) < 0)
{ err = "SIOCGIFNETMASK"; goto faulty; }
get_sockaddr((struct sockaddr_in *) &r->ifr_addr, &netmask, NULL, 0);
l = ipa_mklen(netmask);
if (l < 0 || l == 31)
{
log(L_ERR "%s: Invalid netmask (%x)", i.name, netmask);
goto bad;
}
a.pxlen = l;
if (fl & IFF_POINTOPOINT)
{
a.flags |= IA_UNNUMBERED;
if (ioctl(if_scan_sock, SIOCGIFDSTADDR, r) < 0)
{ err = "SIOCGIFDSTADDR"; goto faulty; }
get_sockaddr((struct sockaddr_in *) &r->ifr_addr, &a.opposite, NULL, 1);
a.prefix = a.opposite;
a.pxlen = BITS_PER_IP_ADDRESS;
}
else
a.prefix = ipa_and(a.ip, ipa_mkmask(a.pxlen));
if (fl & IFF_LOOPBACK)
i.flags |= IF_LOOPBACK | IF_IGNORE;
if (1
#ifndef CONFIG_ALL_MULTICAST
&& (fl & IFF_MULTICAST)
#endif
#ifndef CONFIG_UNNUM_MULTICAST
&& !(a.flags & IA_UNNUMBERED)
#endif
)
i.flags |= IF_MULTICAST;
scope = ipa_classify(a.ip);
if (scope < 0)
{
log(L_ERR "%s: Invalid address", i.name);
goto bad;
}
a.scope = scope & IADDR_SCOPE_MASK;
if (a.pxlen < 32)
{
a.brd = ipa_or(a.prefix, ipa_not(ipa_mkmask(a.pxlen)));
if (ipa_equal(a.ip, a.prefix) || ipa_equal(a.ip, a.brd))
{
log(L_ERR "%s: Using network or broadcast address for interface", i.name);
goto bad;
}
if (fl & IFF_BROADCAST)
i.flags |= IF_BROADCAST;
if (a.pxlen < 30)
i.flags |= IF_MULTIACCESS;
else
a.opposite = ipa_opposite(a.ip, a.pxlen);
}
else
a.brd = a.opposite;
a.scope = SCOPE_UNIVERSE;
if (ioctl(if_scan_sock, SIOCGIFMTU, r) < 0)
{ err = "SIOCGIFMTU"; goto faulty; }
i.mtu = r->ifr_mtu;
#ifdef SIOCGIFINDEX
if (ioctl(if_scan_sock, SIOCGIFINDEX, r) >= 0)
i.index = r->ifr_ifindex;
else if (errno != EINVAL)
DBG("SIOCGIFINDEX failed: %m\n");
else /* defined, but not supported by the kernel */
#endif
/*
* The kernel doesn't give us real ifindices, but we still need them
* at least for OSPF unnumbered links. So let's make them up ourselves.
*/
if (pi = if_find_by_name(i.name))
i.index = pi->index;
else
{
static int if_index_counter = 1;
i.index = if_index_counter++;
}
pi = NULL;
if (sec)
{
a.flags |= IA_SECONDARY;
pi = if_find_by_index(i.index);
}
if (!pi)
pi = if_update(&i);
a.iface = pi;
ifa_update(&a);
}
if_end_update();
}
