struct isis_circuit *
isis_csm_state_change(int event, struct isis_circuit *circuit, void *arg)
{
int old_state;
old_state = circuit ? circuit->state : C_STATE_NA;
if (isis->debugs & DEBUG_EVENTS)
zlog_debug("CSM_EVENT: %s", EVENT2STR(event));
switch (old_state) {
case C_STATE_NA:
if (circuit)
zlog_warn("Non-null circuit while state C_STATE_NA");
assert(circuit == NULL);
switch (event) {
case ISIS_ENABLE:
circuit = isis_circuit_new();
isis_circuit_configure(circuit,
(struct isis_area *)arg);
circuit->state = C_STATE_CONF;
break;
case IF_UP_FROM_Z:
circuit = isis_circuit_new();
isis_circuit_if_add(circuit, (struct interface *)arg);
listnode_add(isis->init_circ_list, circuit);
circuit->state = C_STATE_INIT;
break;
case ISIS_DISABLE:
zlog_warn("circuit already disabled");
break;
case IF_DOWN_FROM_Z:
zlog_warn("circuit already disconnected");
break;
}
break;
case C_STATE_INIT:
assert(circuit);
switch (event) {
case ISIS_ENABLE:
isis_circuit_configure(circuit,
(struct isis_area *)arg);
if (isis_circuit_up(circuit) != ISIS_OK) {
isis_circuit_deconfigure(
circuit, (struct isis_area *)arg);
break;
}
circuit->state = C_STATE_UP;
isis_event_circuit_state_change(circuit, circuit->area,
1);
listnode_delete(isis->init_circ_list, circuit);
break;
case IF_UP_FROM_Z:
assert(circuit);
zlog_warn("circuit already connected");
break;
case ISIS_DISABLE:
zlog_warn("circuit already disabled");
break;
case IF_DOWN_FROM_Z:
isis_circuit_if_del(circuit, (struct interface *)arg);
listnode_delete(isis->init_circ_list, circuit);
isis_circuit_del(circuit);
circuit = NULL;
break;
}
break;
case C_STATE_CONF:
assert(circuit);
switch (event) {
case ISIS_ENABLE:
zlog_warn("circuit already enabled");
break;
case IF_UP_FROM_Z:
isis_circuit_if_add(circuit, (struct interface *)arg);
if (isis_circuit_up(circuit) != ISIS_OK) {
flog_err(
ISIS_ERR_CONFIG,
"Could not bring up %s because of invalid config.",
circuit->interface->name);
flog_err(
ISIS_ERR_CONFIG,
"Clearing config for %s. Please re-examine it.",
circuit->interface->name);
if (circuit->ip_router) {
circuit->ip_router = 0;
circuit->area->ip_circuits--;
}
if (circuit->ipv6_router) {
circuit->ipv6_router = 0;
circuit->area->ipv6_circuits--;
}
circuit_update_nlpids(circuit);
isis_circuit_deconfigure(circuit,
circuit->area);
listnode_add(isis->init_circ_list, circuit);
circuit->state = C_STATE_INIT;
break;
}
circuit->state = C_STATE_UP;
isis_event_circuit_state_change(circuit, circuit->area,
1);
break;
case ISIS_DISABLE:
isis_circuit_deconfigure(circuit,
(struct isis_area *)arg);
isis_circuit_del(circuit);
circuit = NULL;
break;
case IF_DOWN_FROM_Z:
zlog_warn("circuit already disconnected");
break;
}
break;
case C_STATE_UP:
assert(circuit);
switch (event) {
case ISIS_ENABLE:
zlog_warn("circuit already configured");
break;
case IF_UP_FROM_Z:
zlog_warn("circuit already connected");
break;
case ISIS_DISABLE:
isis_circuit_down(circuit);
isis_circuit_deconfigure(circuit,
(struct isis_area *)arg);
circuit->state = C_STATE_INIT;
isis_event_circuit_state_change(
circuit, (struct isis_area *)arg, 0);
listnode_add(isis->init_circ_list, circuit);
break;
case IF_DOWN_FROM_Z:
isis_circuit_down(circuit);
isis_circuit_if_del(circuit, (struct interface *)arg);
circuit->state = C_STATE_CONF;
isis_event_circuit_state_change(circuit, circuit->area,
0);
break;
}
break;
default:
zlog_warn("Invalid circuit state %d", old_state);
}
if (isis->debugs & DEBUG_EVENTS)
zlog_debug("CSM_STATE_CHANGE: %s -> %s ", STATE2STR(old_state),
circuit ? STATE2STR(circuit->state)
: STATE2STR(C_STATE_NA));
return circuit;
}
void skinny_isis_daemon()
{
char errbuf[PCAP_ERRBUF_SIZE];
struct pcap_device device;
struct pcap_isis_callback_data cb_data;
struct host_addr addr;
struct prefix_ipv4 *ipv4;
int index, ret;
char area_tag[] = "default";
struct isis_area *area;
struct isis_circuit *circuit;
struct interface interface;
memset(&device, 0, sizeof(struct pcap_device));
memset(&cb_data, 0, sizeof(cb_data));
memset(&interface, 0, sizeof(interface));
memset(&isis_spf_deadline, 0, sizeof(isis_spf_deadline));
/* initializing IS-IS structures */
isis_init();
dyn_cache_init();
/* thread master */
master = thread_master_create();
if (!config.nfacctd_isis_iface) {
Log(LOG_ERR, "ERROR ( default/core/ISIS ): 'isis_daemon_iface' value is not specified. Terminating thread.\n");
exit(1);
}
if ((device.dev_desc = pcap_open_live(config.nfacctd_isis_iface, 65535, 0, 1000, errbuf)) == NULL) {
Log(LOG_ERR, "ERROR ( default/core/ISIS ): pcap_open_live(): %s\n", errbuf);
exit(1);
}
device.link_type = pcap_datalink(device.dev_desc);
for (index = 0; _isis_devices[index].link_type != -1; index++) {
if (device.link_type == _isis_devices[index].link_type)
device.data = &_isis_devices[index];
}
if (device.data == NULL) {
Log(LOG_ERR, "ERROR ( default/core/ISIS ): data link not supported: %d\n", device.link_type);
return;
}
else {
Log(LOG_INFO, "OK ( default/core/ISIS ): link type is: %d\n", device.link_type);
cb_data.device = &device;
}
area = isis_area_create();
area->area_tag = area_tag;
area->is_type = IS_LEVEL_2;
area->newmetric = TRUE;
listnode_add(isis->area_list, area);
Log(LOG_DEBUG, "DEBUG ( default/core/ISIS ): New IS-IS area instance %s\n", area->area_tag);
if (config.nfacctd_isis_net) area_net_title(area, config.nfacctd_isis_net);
else {
Log(LOG_ERR, "ERROR ( default/core/ISIS ): 'isis_daemon_net' value is not specified. Terminating thread.\n");
exit_all(1);
}
circuit = isis_circuit_new();
circuit->circ_type = CIRCUIT_T_P2P;
circuit->fd = pcap_fileno(device.dev_desc);
circuit->tx = isis_send_pdu_p2p;
circuit->interface = &interface;
circuit->state = C_STATE_UP;
if (config.nfacctd_isis_ip) {
trim_spaces(config.nfacctd_isis_ip);
ret = str_to_addr(config.nfacctd_isis_ip, &addr);
if (!ret) {
Log(LOG_ERR, "ERROR ( default/core/ISIS ): 'isis_daemon_ip' value is not a valid IPv4/IPv6 address. Terminating thread.\n");
exit_all(1);
}
}
else {
Log(LOG_ERR, "ERROR ( default/core/ISIS ): 'isis_daemon_ip' value is not specified. Terminating thread.\n");
exit_all(1);
}
circuit->ip_router = addr.address.ipv4.s_addr;
ipv4 = isis_prefix_ipv4_new();
ipv4->prefixlen = 32;
ipv4->prefix.s_addr = addr.address.ipv4.s_addr;
circuit->ip_addrs = list_new();
listnode_add(circuit->ip_addrs, ipv4);
circuit_update_nlpids(circuit);
isis_circuit_configure(circuit, area);
cb_data.circuit = circuit;
area->ip_circuits = 1;
memcpy(circuit->interface->name, config.nfacctd_isis_iface, strlen(config.nfacctd_isis_iface));
circuit->interface->ifindex = if_nametoindex(config.nfacctd_isis_iface);
if (!config.nfacctd_isis_mtu) config.nfacctd_isis_mtu = SNAPLEN_ISIS_DEFAULT;
for (;;) {
/* XXX: should get a select() here at some stage? */
pcap_loop(device.dev_desc, -1, isis_pdu_runner, (u_char *) &cb_data);
break;
}
pcap_close(device.dev_desc);
}
