/*
* Initialize the virtual interfaces, but do not install
* them in the kernel. Start routing on all vifs that are
* not down or disabled.
*/
void init_vifs(void)
{
vifi_t vifi;
struct uvif *v;
int enabled_vifs, enabled_phyints;
extern char *configfilename;
numvifs = 0;
vifs_with_neighbors = 0;
vifs_down = FALSE;
/*
* Configure the vifs based on the interface configuration of the
* the kernel and the contents of the configuration file.
* (Open a UDP socket for ioctl use in the config procedures if
* the kernel can't handle IOCTL's on the IGMP socket.)
*/
#ifdef IOCTL_OK_ON_RAW_SOCKET
udp_socket = igmp_socket;
#else
if ((udp_socket = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
logit(LOG_ERR, errno, "UDP socket");
#endif
logit(LOG_INFO,0,"Getting vifs from kernel interfaces");
config_vifs_from_kernel();
logit(LOG_INFO,0,"Getting vifs from %s",configfilename);
config_vifs_from_file();
/*
* Quit if there are fewer than two enabled vifs.
*/
enabled_vifs = 0;
enabled_phyints = 0;
phys_vif = -1;
for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
if (!(v->uv_flags & VIFF_DISABLED)) {
++enabled_vifs;
if (!(v->uv_flags & VIFF_TUNNEL)) {
if (phys_vif == -1)
phys_vif = vifi;
++enabled_phyints;
}
}
}
if (enabled_vifs < 2)
logit(LOG_ERR, 0, "Cannot forward: %s",
enabled_vifs == 0 ? "no enabled vifs" : "only one enabled vif");
if (enabled_phyints == 0)
logit(LOG_WARNING, 0, "No enabled interfaces, forwarding via tunnels only");
logit(LOG_INFO, 0, "Installing vifs in mrouted ...");
for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
if (!(v->uv_flags & VIFF_DISABLED)) {
if (!(v->uv_flags & VIFF_DOWN)) {
if (v->uv_flags & VIFF_TUNNEL)
logit(LOG_INFO, 0, "vif #%d, tunnel %s -> %s", vifi,
inet_fmt(v->uv_lcl_addr, s1, sizeof(s1)),
inet_fmt(v->uv_rmt_addr, s2, sizeof(s2)));
else
logit(LOG_INFO, 0, "vif #%d, phyint %s", vifi,
inet_fmt(v->uv_lcl_addr, s1, sizeof(s1)));
start_vif2(vifi);
} else {
logit(LOG_INFO, 0, "%s is not yet up; vif #%u not in service",
v->uv_name, vifi);
}
}
}
}
void init_vifs()
{
mifi_t vifi;
struct uvif *v;
int enabled_vifs;
numvifs = 0;
reg_vif_num = NO_VIF;
/*
* Configure the vifs based on the interface configuration of
* the kernel and the contents of the configuration file.
* (Open a UDP socket for ioctl use in the config procedures if
* the kernel can't handle IOCTL's on the MLD socket.)
*/
#ifdef IOCTL_OK_ON_RAW_SOCKET
udp_socket = mld6_socket;
#else
if ((udp_socket = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
log_msg(LOG_ERR, errno, "UDP6 socket");
#endif
/* clean all the interfaces ... */
for (vifi = 0, v = uvifs; vifi < MAXMIFS; ++vifi, ++v) {
memset(v, 0, sizeof(*v));
v->uv_metric = DEFAULT_METRIC;
v->uv_rate_limit = DEFAULT_PHY_RATE_LIMIT;
#ifdef HAVE_STRLCPY
strlcpy(v->uv_name, "", IFNAMSIZ);
#elif HAVE_STRNCPY
strncpy(v->uv_name, "", IFNAMSIZ);
#else
strcpy(v->uv_name, "");
#endif
v->uv_local_pref = default_source_preference;
v->uv_local_metric = default_source_metric;
v->uv_priority = PIM_DEFAULT_DR_PRIORITY;
v->uv_mld_version = MLD6_DEFAULT_VERSION;
v->uv_mld_robustness = MLD6_DEFAULT_ROBUSTNESS_VARIABLE;
v->uv_mld_query_interval = MLD6_DEFAULT_QUERY_INTERVAL;
v->uv_mld_query_rsp_interval = MLD6_DEFAULT_QUERY_RESPONSE_INTERVAL;
v->uv_mld_llqi = MLD6_DEFAULT_LAST_LISTENER_QUERY_INTERVAL;
}
IF_DEBUG(DEBUG_IF)
log_msg(LOG_DEBUG, 0, "Interfaces world initialized...");
IF_DEBUG(DEBUG_IF)
log_msg(LOG_DEBUG, 0, "Getting vifs from %s", configfilename);
/* read config from file */
if (cfparse(1, 0) != 0)
log_msg(LOG_ERR, 0, "fatal error in parsing the config file");
enabled_vifs = 0;
phys_vif = -1;
IF_DEBUG(DEBUG_IF)
log_msg(LOG_DEBUG, 0, "Getting vifs from kernel");
config_vifs_from_kernel();
/* IPv6 PIM needs one global unicast address (at least for now) */
if (max_global_address() == NULL)
log_msg(LOG_ERR, 0, "There's no global address available");
for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
struct phaddr *p;
if (v->uv_flags & (VIFF_DISABLED | MIFF_REGISTER))
continue;
enabled_vifs++;
if (v->uv_flags & VIFF_DOWN)
continue;
if (v->uv_linklocal == NULL)
log_msg(LOG_ERR, 0,
"there is no link-local address on vif %s",
v->uv_name);
/* If this vif has a global address, set its id to phys_vif */
if (phys_vif != -1)
continue;
for (p = v->uv_addrs; p; p = p->pa_next) {
if (!IN6_IS_ADDR_LINKLOCAL(&p->pa_addr.sin6_addr)) {
phys_vif = vifi;
break;
}
}
}
if (enabled_vifs < 2)
log_msg(LOG_ERR, 0, "can't forward: %s",
enabled_vifs == 0 ? "no enabled vifs" :
"only one enabled vif");
memset(&if_nullset, 0, sizeof(if_nullset));
k_init_pim(mld6_socket);
IF_DEBUG(DEBUG_PIM_DETAIL)
log_msg(LOG_DEBUG, 0, "Pim kernel initialization done");
/* Add a dummy virtual interface to support Registers in the kernel. */
init_reg_vif();
start_all_vifs();
}
