/*
* Initialize the passed vif with all appropriate default values.
* "t" is true if a tunnel, or false if a phyint.
*/
void zero_vif(struct uvif *v, int t)
{
v->uv_flags = 0;
v->uv_metric = DEFAULT_METRIC;
v->uv_admetric = 0;
v->uv_threshold = DEFAULT_THRESHOLD;
v->uv_rate_limit = t ? DEFAULT_TUN_RATE_LIMIT : DEFAULT_PHY_RATE_LIMIT;
v->uv_lcl_addr = 0;
v->uv_rmt_addr = 0;
v->uv_dst_addr = t ? 0 : dvmrp_group;
v->uv_subnet = 0;
v->uv_subnetmask = 0;
v->uv_subnetbcast = 0;
v->uv_name[0] = '\0';
v->uv_groups = NULL;
v->uv_neighbors = NULL;
NBRM_CLRALL(v->uv_nbrmap);
v->uv_querier = NULL;
v->uv_igmpv1_warn = 0;
v->uv_prune_lifetime = 0;
v->uv_leaf_timer = 0;
v->uv_acl = NULL;
v->uv_addrs = NULL;
v->uv_filter = NULL;
v->uv_blasterbuf = NULL;
v->uv_blastercur = NULL;
v->uv_blasterend = NULL;
v->uv_blasterlen = 0;
v->uv_blastertimer = 0;
v->uv_nbrup = 0;
v->uv_icmp_warn = 0;
v->uv_nroutes = 0;
}
/*
* Query the kernel to find network interfaces that are multicast-capable
* and install them in the uvifs array.
*/
void
config_vifs_from_kernel()
{
register struct uvif *v=NULL;
register vifi_t vifi;
struct sockaddr_in6 addr;
struct in6_addr mask, prefix;
short flags;
#ifdef HAVE_GETIFADDRS
struct ifaddrs *ifap=NULL, *ifa=NULL;//init by ziqiang
#else
int n;
int num_ifreq = 64;
struct ifconf ifc;
struct ifreq *ifrp=NULL, *ifend=NULL;//init by ziqiang
#endif
total_interfaces = 0; /* The total number of physical interfaces */
#ifdef HAVE_GETIFADDRS
if (getifaddrs(&ifap))
{
syslog(LOG_ERR, "getiaddrs() error ifap = %p\n",ifap);
return ;//by ziqiang
}
/*
* Loop through all of the interfaces.
*/
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
/*
* Ignore any interface for an address family other than IPv6.
*/
if (ifa->ifa_addr->sa_family != AF_INET6) {
total_interfaces++; /* Eventually may have IPv6 address later */
continue;
}
memcpy(&addr, ifa->ifa_addr, sizeof(struct sockaddr_in6));
flags = ifa->ifa_flags;
if ((flags & (IFF_LOOPBACK | IFF_MULTICAST)) != IFF_MULTICAST)
continue;
/*
* Get netmask of the address.
*/
//memcpy(&mask, &((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr,
// sizeof(mask));
inet_pton(AF_INET6, "ffff:ffff:ffff:ffff::", &mask);
if (IN6_IS_ADDR_LINKLOCAL(&addr.sin6_addr)) {
addr.sin6_scope_id = if_nametoindex(ifa->ifa_name);
#ifdef __KAME__
/*
* Hack for KAME kernel. Set sin6_scope_id field of a
* link local address and clear the index embedded in
* the address.
*/
/* clear interface index */
addr.sin6_addr.s6_addr[2] = 0;
addr.sin6_addr.s6_addr[3] = 0;
#endif
}
/*
* If the address is connected to the same subnet as one already
* installed in the uvifs array, just add the address to the list
* of addresses of the uvif.
*/
for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
if (strcmp(v->uv_name, ifa->ifa_name) == 0) {
add_phaddr(v, &addr, &mask);
break;
}
}
if (vifi != numvifs)
continue;
/*
* If there is room in the uvifs array, install this interface.
*/
if (numvifs == MAXMIFS) {
syslog(LOG_WARNING, "too many ifs, ignoring %s", ifa->ifa_name);
continue;
}
/*
* Everyone below is a potential vif interface.
* We don't care if it has wrong configuration or not configured
* at all.
*/
total_interfaces++;
v = &uvifs[numvifs];
v->uv_flags = 0;
v->uv_metric = DEFAULT_METRIC;
v->uv_admetric = 0;
v->uv_rate_limit = DEFAULT_PHY_RATE_LIMIT;
v->uv_dst_addr = allpim6routers_group;
v->uv_prefix.sin6_addr = prefix;
v->uv_subnetmask = mask;
strncpy(v->uv_name, ifa->ifa_name, IFNAMSIZ);
v->uv_ifindex = if_nametoindex(v->uv_name);
v->uv_groups = (struct listaddr *)NULL;
v->uv_dvmrp_neighbors = (struct listaddr *)NULL;
NBRM_CLRALL(v->uv_nbrmap);
v->uv_querier = (struct listaddr *)NULL;
v->uv_prune_lifetime = 0;
v->uv_acl = (struct vif_acl *)NULL;
v->uv_leaf_timer = 0;
v->uv_addrs = (struct phaddr *)NULL;
v->uv_filter = (struct vif_filter *)NULL;
v->uv_pim_hello_timer = 0;
v->uv_gq_timer = 0;
v->uv_pim_neighbors = (struct pim_nbr_entry *)NULL;
v->uv_local_pref = default_source_preference;
v->uv_local_metric = default_source_metric;
add_phaddr(v, &addr, &mask);
if (flags & IFF_POINTOPOINT)
v->uv_flags |= (VIFF_REXMIT_PRUNES | VIFF_POINT_TO_POINT);
syslog(LOG_INFO,
"installing %s as if #%u - rate=%d",
v->uv_name, numvifs, v->uv_rate_limit);
++numvifs;
/*
* If the interface is not yet up, set the vifs_down flag to
* remind us to check again later.
*/
if (!(flags & IFF_UP)) {
v->uv_flags |= VIFF_DOWN;
vifs_down = TRUE;
}
}
freeifaddrs(ifap);
#else /* !HAVE_GETIFADDRS */
ifc.ifc_len = num_ifreq * sizeof(struct ifreq);
ifc.ifc_buf = calloc(ifc.ifc_len, sizeof(char));
while (ifc.ifc_buf) {
caddr_t newbuf;
if (ioctl(udp_socket, SIOCGIFCONF, (char *)&ifc) < 0)
syslog(LOG_ERR, "ioctl SIOCGIFCONF");
/*
* If the buffer was large enough to hold all the addresses
* then break out, otherwise increase the buffer size and
* try again.
*
* The only way to know that we definitely had enough space
* is to know that there was enough space for at least one
* more struct ifreq. ???
*/
if ((num_ifreq * sizeof(struct ifreq)) >=
ifc.ifc_len + sizeof(struct ifreq))
break;
num_ifreq *= 2;
ifc.ifc_len = num_ifreq * sizeof(struct ifreq);
newbuf = realloc(ifc.ifc_buf, ifc.ifc_len);
if (newbuf == NULL)
free(ifc.ifc_buf);
ifc.ifc_buf = newbuf;
}
if (ifc.ifc_buf == NULL)
syslog(LOG_ERR, "config_vifs_from_kernel: ran out of memory");
ifrp = (struct ifreq *)ifc.ifc_buf;
ifend = (struct ifreq *)(ifc.ifc_buf + ifc.ifc_len);
/*
* Loop through all of the interfaces.
*/
for (; ifrp < ifend; ifrp = (struct ifreq *)((char *)ifrp + n)) {
struct ifreq ifr;
struct in6_ifreq ifr6;
#ifdef HAVE_SA_LEN
n = ifrp->ifr_addr.sa_len + sizeof(ifrp->ifr_name);
if (n < sizeof(*ifrp))
n = sizeof(*ifrp);
#else
n = sizeof(*ifrp);
#endif /* HAVE_SA_LEN */
/*
* Ignore any interface for an address family other than IPv6.
*/
if (ifrp->ifr_addr.sa_family != AF_INET6) {
total_interfaces++; /* Eventually may have IPv6 address later */
continue;
}
memcpy(&addr, &ifrp->ifr_addr, sizeof(struct sockaddr_in6));
/*
* Need a template to preserve address info that is
* used below to locate the next entry. (Otherwise,
* SIOCGIFFLAGS stomps over it because the requests
* are returned in a union.)
*/
memcpy(ifr.ifr_name, ifrp->ifr_name, sizeof(ifr.ifr_name));
memcpy(ifr6.ifr_name, ifrp->ifr_name, sizeof(ifr6.ifr_name));
/*
* Ignore loopback interfaces and interfaces that do not
* support multicast.
*/
if (ioctl(udp_socket, SIOCGIFFLAGS, (char *)&ifr) < 0)
syslog(LOG_ERR, "ioctl SIOCGIFFLAGS for %s", ifr.ifr_name);
flags = ifr.ifr_flags;
if ((flags & (IFF_LOOPBACK | IFF_MULTICAST)) != IFF_MULTICAST)
continue;
/*
* Get netmask of the address.
*/
ifr6.ifr_addr = *(struct sockaddr_in6 *)&ifrp->ifr_addr;
if (ioctl(udp_socket, SIOCGIFNETMASK_IN6, (char *)&ifr6) < 0)
syslog(LOG_ERR, "ioctl SIOCGIFNETMASK_IN6 for %s",
ifr6.ifr_name);
memcpy(&mask, &ifr6.ifr_addr.sin6_addr, sizeof(mask));
if (IN6_IS_ADDR_LINKLOCAL(&addr.sin6_addr)) {
addr.sin6_scope_id = if_nametoindex(ifrp->ifr_name);
#ifdef __KAME__
/*
* Hack for KAME kernel. Set sin6_scope_id field of a
* link local address and clear the index embedded in
* the address.
*/
/* clear interface index */
addr.sin6_addr.s6_addr[2] = 0;
addr.sin6_addr.s6_addr[3] = 0;
#endif
}
/*
* If the address is connected to the same subnet as one already
* installed in the uvifs array, just add the address to the list
* of addresses of the uvif.
*/
for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
if (strcmp(v->uv_name, ifr.ifr_name) == 0) {
add_phaddr(v, &addr, &mask);
break;
}
}
if (vifi != numvifs)
continue;
/*
* If there is room in the uvifs array, install this interface.
*/
if (numvifs == MAXMIFS) {
syslog(LOG_WARNING, "too many ifs, ignoring %s", ifr.ifr_name);
continue;
}
/*
* Everyone below is a potential vif interface.
* We don't care if it has wrong configuration or not configured
* at all.
*/
total_interfaces++;
v = &uvifs[numvifs];
v->uv_flags = 0;
v->uv_metric = DEFAULT_METRIC;
v->uv_admetric = 0;
v->uv_rate_limit = DEFAULT_PHY_RATE_LIMIT;
v->uv_dst_addr = allpim6routers_group;
v->uv_prefix.sin6_addr = prefix;
v->uv_subnetmask = mask;
strncpy(v->uv_name, ifr.ifr_name, IFNAMSIZ);
v->uv_ifindex = if_nametoindex(v->uv_name);
v->uv_groups = (struct listaddr *)NULL;
v->uv_dvmrp_neighbors = (struct listaddr *)NULL;
NBRM_CLRALL(v->uv_nbrmap);
v->uv_querier = (struct listaddr *)NULL;
v->uv_prune_lifetime = 0;
v->uv_acl = (struct vif_acl *)NULL;
v->uv_leaf_timer = 0;
v->uv_addrs = (struct phaddr *)NULL;
v->uv_filter = (struct vif_filter *)NULL;
v->uv_pim_hello_timer = 0;
v->uv_gq_timer = 0;
v->uv_pim_neighbors = (struct pim_nbr_entry *)NULL;
v->uv_local_pref = default_source_preference;
v->uv_local_metric = default_source_metric;
add_phaddr(v, &addr, &mask);
if (flags & IFF_POINTOPOINT)
v->uv_flags |= (VIFF_REXMIT_PRUNES | VIFF_POINT_TO_POINT);
syslog(LOG_INFO,
"installing %s as if #%u - rate=%d",
v->uv_name, numvifs, v->uv_rate_limit);
++numvifs;
/*
* If the interface is not yet up, set the vifs_down flag to
* remind us to check again later.
*/
if (!(flags & IFF_UP)) {
v->uv_flags |= VIFF_DOWN;
vifs_down = TRUE;
}
}
#endif /* HAVE_GETIFADDRS */
}
