[hipl-dev] [Bug 789327] Re: mobility is broken
- From: Stefan Götz <789327@xxxxxxxxxxxxxxxxxx>
- To: hipl-dev@xxxxxxxxxxxxx
- Date: Thu, 09 Jun 2011 06:45:14 -0000
lp:~stefan.goetz/hipl/mobility-bug rev. 5957 prevents the described
segmentation fault. From the commit message: Add missing initialization
to 'peer_addr' variable. Revision 5938 erroneously removed code that was
necessary to change the value of the peer_addr pointer to an actual peer
address. This caused a NULL pointer access and segmentation fault when
handling a locator parameter during an UPDATE message.
I tested the linked branch with two hosts and simulated mobility by:
1) running 'hipconf manual-update'
2) putting the network interface down and up again and
3) changing the IPv4 address of the network interface
None of the tests crash hipd. In tests 1) and 2), HIP connectivity is
maintained.
I observe the following remaining issues which are, however, also
present in trunk revision 5937, i.e., before this particular bug was
introduced:
- In test 3) HIP connectivity is lost even though an UPDATE message is
sent. Only after running 'hipconf manual-update' HIP connectivity is
restored.
- pinging a HIT right after changing the IPv4 address of the network
device fails with the error message 'connect: Invalid argument' for
about 5 seconds after the address change.
- every UPDATE message triggers the following error on the responder:
"error(modules/update/hipd/update_param_handling.c:289@hip_handl:
ECHO_REQUEST parameter not found!"
I was not able to test IPv6 mobility because using 'hipconf add map' to
associate a HIT with a link-local IPv6 address fails with the following
hipd errors:
error(hipd/netdev.c:1412@hip_select_source_address): No address of the same
family
error(hipd/hadb.c:613@hip_hadb_add_peer_info): Cannot find source address
error(hipd/hadb.c:663@hip_add_peer_map): Failed to insert peer map (-1)
error(hipd/user.c:296@hip_handle_user_msg): add peer mapping failed.
Can someone confirm these results? In particular that the linked branch
fixes the described bug?
Cheers,
Stefan
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https://bugs.launchpad.net/bugs/789327
Title:
mobility is broken
Status in Host Identity Protocol for Linux:
In Progress
Bug description:
I tested hard IPv6-only handovers. After base exchange, I delete and
add a new IPv6 address and this occurs at the other host:
debug(hipd/input.c:565@hip_receive_control_packet): HIP association state
ESTABLISHED
debug(hipd/input.c:573@hip_receive_control_packet): handle relay to failed,
continue the bex handler
debug(modules/update/hipd/update.c:190@hip_check_update_freshne: previous
incoming update id=0
debug(modules/update/hipd/update.c:192@hip_check_update_freshne: previous
outgoing update id=4294967295
debug(modules/update/hipd/update.c:198@hip_check_update_freshne: SEQ
parameter found with Update ID 1.
debug(hipd/input.c:144@hip_verify_packet_hmac_general):
hip_verify_packet_hmac() invoked.
debug(hipd/input.c:111@hip_verify_hmac): HMAC
data0x3B111011000000002001001911ACE3AF236711A41A3636EC20010015E1568A783226DBAAF2FFED060041000C00000090E5A9B875E5A9B87500C10048000104000000000000000000000000000000FFFFC0A800A500010400000000003FFE000000000000000000000000000800010400000000002001000053AA064C08BB20A5AD4A59A7000000000181000400000001
debug(lib/core/crypto.c:378@hip_write_hmac): HMAC
key:0xF9352844AE24C972EE121CFAC915C858884C8656
debug(lib/core/crypto.c:379@hip_write_hmac): HMAC
in:0x3B111011000000002001001911ACE3AF236711A41A3636EC20010015E1568A783226DBAAF2FFED060041000C00000090E5A9B875E5A9B87500C10048000104000000000000000000000000000000FFFFC0A800A500010400000000003FFE000000000000000000000000000800010400000000002001000053AA064C08BB20A5AD4A59A7000000000181000400000001
debug(lib/core/crypto.c:380@hip_write_hmac): HMAC
out:0x2451F4234BBF62433DC4C8445BBE51B45BBBEFAD
debug(hipd/input.c:117@hip_verify_hmac):
HMAC0x2451F4234BBF62433DC4C8445BBE51B45BBBEFAD
debug(modules/update/hipd/update_param_handling.c:343@hip_handl: LOCATOR has
3 address(es), loc param len=80
debug(modules/update/hipd/update_param_handling.c:350@hip_handl:
hip_get_state_item returned localstate: 0x675290
debug(modules/update/hipd/update_param_handling.c:363@hip_handl: Comparing:
3ffe:0000:0000:0000:0000:0000:0000:0008
debug(lib/core/debug.c:741@hip_print_hit): to : NULL
Program received signal SIGSEGV, Segmentation fault.
0x000000000043cc9e in ipv6_addr_cmp (a1=0x7fffffffea30, a2=0x0) at
lib/core/prefix.c:391
391 return memcmp(a1, a2, sizeof(struct in6_addr));
(gdb) bt
#0 0x000000000043cc9e in ipv6_addr_cmp (a1=0x7fffffffea30, a2=0x0) at
lib/core/prefix.c:391
#1 0x0000000000428b14 in hip_handle_locator_parameter (packet_type=<value
optimised out>, ha_state=<value optimised out>, ctx=0x7fffffffea20)
at modules/update/hipd/update_param_handling.c:366
#2 0x00000000004217ad in hip_run_handle_functions (packet_type=<value
optimised out>, ha_state=5, ctx=0x7fffffffea20) at hipd/pkt_handling.c:161
#3 0x000000000041937a in hip_receive_control_packet (ctx=0x7fffffffea20) at
hipd/input.c:577
#4 0x0000000000411ed1 in hip_handle_raw_input_v6 (ctx=0x7fffffffea20) at
hipd/hip_socket.c:76
#5 0x0000000000411734 in hip_run_socket_handles (read_fdset=0x7fffffffe990,
ctx=0x7fffffffea20) at hipd/hip_socket.c:307
#6 0x00000000004124f9 in hipd_main (argc=<value optimised out>, argv=<value
optimised out>) at hipd/hipd.c:403
#7 main (argc=<value optimised out>, argv=<value optimised out>) at
hipd/hipd.c:464
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