调试组播发送

b unix-datagram-socket-fd.cc:530

b unix-socket-fd.cc:553

(gdb) p length
$2 = 1
(gdb) bt
#0  ns3::UnixSocketFd::Setsockopt (this=0x7fffdc007ed0, level=0, optname=42, optval=0x7ffff0a28470, optlen=136) at ../model/unix-socket-fd.cc:566
#1  0x00007ffff7a55bb1 in dce_setsockopt (fd=6, level=0, optname=42, optval=0x7ffff0a28470, optlen=136) at ../model/dce-fd.cc:522
#2  0x00007ffff1a4f623 in setsockopt () at ../model/libc-ns3.h:183
#3  0x00007ffff07a3f18 in setsockopt_ipv4_multicast (sock=6, optname=35, mcast_addr=33554656, ifindex=0) at sockopt.c:237
#4  0x00007ffff072cdd8 in mpls_socket_multicast_if_join (handle=-559038737, socket=0x7ffff06fc0d8, iff=0x7ffff0709ad8, mult=0x7ffff0709b78) at impl_socket.c:399
#5  0x00007ffff074f8d0 in ldp_if_startup (g=0x7ffff06fadc8, i=0x7ffff0709ad8) at ldp_if.c:227
#6  0x00007ffff074581f in ldp_entity_startup (g=0x7ffff06fadc8, e=0x7ffff06fbb58) at ldp_entity.c:160
#7  0x00007ffff0748ebf in ldp_global_startup (g=0x7ffff06fadc8) at ldp_global.c:227
#8  0x00007ffff073f35a in ldp_cfg_global_set (handle=0x7ffff06fadc8, g=0x7ffff0a28670, flag=2) at ldp_cfg.c:214
#9  0x00007ffff072fa28 in ldp_startup (ldp=0x7ffff06fb248) at ldp.c:32
#10 0x00007ffff072fa7b in ldp_admin_state_finish (ldp=0x7ffff06fb248) at ldp.c:44
#11 0x00007ffff072fb70 in ldp_router_id_update (ldp=0x7ffff06fb248, router_id=0x7ffff09dbcf0 <router_id>) at ldp.c:74
#12 0x00007ffff072dd93 in ldp_router_id_update_zebra (command=22, zclient=0x7ffff06fd558, length=6) at ldp_zebra.c:44
#13 0x00007ffff07a32b6 in zclient_read (thread=0x7ffff0a28b10) at zclient.c:1697
#14 0x00007ffff078ff05 in thread_call (thread=0x7ffff0a28b10) at thread.c:1271
#15 0x00007ffff072f982 in main (argc=5, argv=0x68ebe0) at ldp_main.c:256
#16 0x00007ffff79fc76f in ns3::DceManager::DoStartProcess (context=0x71d9a0) at ../model/dce-manager.cc:283
#17 0x00007ffff7a874f4 in ns3::TaskManager::Trampoline (context=0x66cdf0) at ../model/task-manager.cc:274
#18 0x00007ffff7a834cf in ns3::PthreadFiberManager::Run (arg=0x71dc90) at ../model/pthread-fiber-manager.cc:402
#19 0x000000318b2079d1 in start_thread () from /lib64/libpthread.so.0
#20 0x000000318a6e88fd in clone () from /lib64/libc.so.6
(gdb) 

加入的组还是不够全局。