сыпятся ошибки, подскажите...

[May 27 15:33:53] ERROR[16290]: sip/reqresp_parser.c:2328 parse_via: missing sent-by in Via header
[May 27 15:33:53] ERROR[16290]: netsock2.c:263 ast_sockaddr_resolve: getaddrinfo("", "(null)", ...): No address associated with hostname
[May 27 15:33:53] ERROR[16290]: sip/reqresp_parser.c:2328 parse_via: missing sent-by in Via header
[May 27 15:33:53] ERROR[16290]: chan_sip.c:7572 process_via: error processing via header
[May 27 15:33:53] WARNING[16290]: chan_sip.c:9992 respprep: error processing via header, will send response to originating address
[May 27 15:33:57] ERROR[16290]: sip/reqresp_parser.c:2328 parse_via: missing sent-by in Via header
[May 27 15:33:57] ERROR[16290]: netsock2.c:263 ast_sockaddr_resolve: getaddrinfo("", "(null)", ...): No address associated with hostname
[May 27 15:33:57] ERROR[16290]: sip/reqresp_parser.c:2328 parse_via: missing sent-by in Via header
[May 27 15:33:57] ERROR[16290]: chan_sip.c:7572 process_via: error processing via header
[May 27 15:33:57] WARNING[16290]: chan_sip.c:9992 respprep: error processing via header, will send response to originating address