Hello there,

I'm using dialog module to send keep alive options to callee and caller in order to detect if dialog still up, but when kamailio generates the OPTION and parse it,  gives the following errors:

[root@c4-compute02-srv1 kamailio]# 37(1587) DEBUG: dialog [dlg_hash.c:614]: dlg_lookup(): ref dlg 0x7f89134c1d40 with 1 -> 3

37(1587) DEBUG: dialog [dlg_hash.c:616]: dlg_lookup(): dialog id=2210 found on entry 2350

37(1587) DEBUG: dialog [dlg_req_within.c:427]: dlg_send_ka(): sending OPTIONS to caller

37(1587) DEBUG: tm [uac.c:249]: t_uac_prepare(): DEBUG:tm:t_uac: next_hop=<sip:unknown@62.28.197.25:5060>

37(1587) DEBUG: <core> [dns_cache.c:3293]: dns_srv_sip_resolve(): (62.28.197.25, 0, 0), ip, ret=0

37(1587) DEBUG: tm [uac.c:150]: dlg2hash(): DEBUG: dlg2hash: 14692

37(1587) DEBUG: <core> [parser/msg_parser.c:606]: parse_msg(): SIP Request:

37(1587) DEBUG: <core> [parser/msg_parser.c:608]: parse_msg():  method:  <OPTIONS>

37(1587) DEBUG: <core> [parser/msg_parser.c:610]: parse_msg():  uri:     <sip:unknown@62.28.197.25:5060>

37(1587) DEBUG: <core> [parser/msg_parser.c:612]: parse_msg():  version: <SIP/2.0>

37(1587) DEBUG: <core> [parser/parse_via.c:1254]: parse_via_param(): Found param type 232, <branch> = <z9hG4bK4693.2af96e95000000000000000000000000.0>; state=16

37(1587) DEBUG: <core> [parser/parse_via.c:2642]: parse_via(): end of header reached, state=5

37(1587) DEBUG: <core> [parser/msg_parser.c:496]: parse_headers(): parse_headers: Via found, flags=2

37(1587) DEBUG: <core> [parser/msg_parser.c:498]: parse_headers(): parse_headers: this is the first via

37(1587) DEBUG: <core> [parser/parse_addr_spec.c:172]: parse_to_param(): DEBUG: add_param: tag=90d40279ee5745d8851aa989e6fadfc2

37(1587) DEBUG: <core> [parser/parse_addr_spec.c:894]: parse_addr_spec(): end of header reached, state=29

37(1587) DEBUG: <core> [parser/msg_parser.c:173]: get_hdr_field(): DEBUG: get_hdr_field: <To> [64]; uri=[sip:unknown@62.28.197.6] 

37(1587) DEBUG: <core> [parser/msg_parser.c:175]: get_hdr_field(): DEBUG: to body [<sip:unknown@62.28.197.6>]

37(1587) DEBUG: <core> [parser/msg_parser.c:153]: get_hdr_field(): get_hdr_field: cseq <CSeq>: <0> <OPTIONS>

37(1587) DEBUG: <core> [parser/msg_parser.c:187]: get_hdr_field(): DEBUG: get_hdr_body : content_length=0

37(1587) ERROR: <core> [parser/msg_parser.c:96]: get_hdr_field(): ERROR: get_hdr_field: bad header

37(1587) DEBUG: <core> [parser/msg_parser.c:280]: get_hdr_field(): get_hdr_field: error exit

37(1587) INFO: <core> [parser/msg_parser.c:338]: parse_headers(): ERROR: bad header field [VC

]

37(1587) DEBUG: topoh [topoh_mod.c:232]: th_prepare_msg(): parsing headers failed37(1587) DEBUG: <core> [parser/msg_parser.c:606]: parse_msg(): SIP Request:

37(1587) DEBUG: <core> [parser/msg_parser.c:608]: parse_msg():  method:  <OPTIONS>

37(1587) DEBUG: <core> [parser/msg_parser.c:610]: parse_msg():  uri:     <sip:unknown@62.28.197.25:5060>

37(1587) DEBUG: <core> [parser/msg_parser.c:612]: parse_msg():  version: <SIP/2.0>

37(1587) DEBUG: <core> [parser/parse_via.c:1254]: parse_via_param(): Found param type 232, <branch> = <z9hG4bK4693.2af96e95000000000000000000000000.0>; state=16

37(1587) DEBUG: <core> [parser/parse_via.c:2642]: parse_via(): end of header reached, state=5

37(1587) DEBUG: <core> [parser/msg_parser.c:496]: parse_headers(): parse_headers: Via found, flags=2

37(1587) DEBUG: <core> [parser/msg_parser.c:498]: parse_headers(): parse_headers: this is the first via

37(1587) DEBUG: <core> [parser/parse_addr_spec.c:172]: parse_to_param(): DEBUG: add_param: tag=90d40279ee5745d8851aa989e6fadfc2

37(1587) DEBUG: <core> [parser/parse_addr_spec.c:894]: parse_addr_spec(): end of header reached, state=29

37(1587) DEBUG: <core> [parser/msg_parser.c:173]: get_hdr_field(): DEBUG: get_hdr_field: <To> [64]; uri=[sip:unknown@62.28.197.6] 

37(1587) DEBUG: <core> [parser/msg_parser.c:175]: get_hdr_field(): DEBUG: to body [<sip:unknown@62.28.197.6>]

37(1587) DEBUG: <core> [parser/msg_parser.c:153]: get_hdr_field(): get_hdr_field: cseq <CSeq>: <0> <OPTIONS>

37(1587) DEBUG: <core> [parser/parse_addr_spec.c:172]: parse_to_param(): DEBUG: add_param: tag=e34d43e164ad4b7392dc9c6e1058a983

37(1587) DEBUG: <core> [parser/parse_addr_spec.c:894]: parse_addr_spec(): end of header reached, state=29

37(1587) DEBUG: dialog [dlg_cseq.c:215]: dlg_cseq_msg_sent(): traking cseq updates

37(1587) DEBUG: dialog [dlg_hash.c:671]: internal_get_dlg(): ref dlg 0x7f89134c1d40 with 1 -> 4

37(1587) DEBUG: dialog [dlg_hash.c:674]: internal_get_dlg(): dialog callid='13208317017c42128fbf00e1685ee1b3' found on entry 2350, dir=2

37(1587) DEBUG: dialog [dlg_cseq.c:233]: dlg_cseq_msg_sent(): request not going downstream (2)

37(1587) DEBUG: dialog [dlg_hash.c:846]: dlg_unref(): unref dlg 0x7f89134c1d40 with 1 -> 3

37(1587) DEBUG: dialog [dlg_req_within.c:452]: dlg_send_ka(): keep-alive sent to caller

37(1587) DEBUG: dialog [dlg_req_within.c:427]: dlg_send_ka(): sending OPTIONS to callee

I'm using the following dialog configuration:

modparam("dialog","db_url", DBURL)

modparam("dialog","db_mode", 0)

modparam("dialog","enable_stats", 1)

modparam("dialog","dlg_flag", DLG_FLAG)

modparam("dialog","profiles_with_value","concurrentcalls")

modparam("dialog", "detect_spirals", 1)

modparam("dialog","dlg_match_mode", 2)

modparam("dialog", "initial_cbs_inscript", 0)

modparam("dialog", "default_timeout", 3600)

modparam("dialog", "send_bye", 1)

modparam("dialog", "timeout_avp", "$avp(s:timeout_dlg)")

modparam("dialog", "track_cseq_updates", 1)

modparam("dialog", "ka_timer", 10)

modparam("dialog", "ka_interval", 30)

I'm  also using topoh module.

Anyone can help me to identify if I'm doing the proper configuration? 

Thank you for your support

Best Regards 

José Seabra