SIP_HDR_TO 205 net/ipv4/netfilter/nf_nat_sip.c !map_sip_addr(skb, dptr, datalen, SIP_HDR_TO)) SIP_HDR_TO 284 net/netfilter/nf_conntrack_sip.c [SIP_HDR_TO] = SIP_HDR("To", "t", "sip:", skp_epaddr_len),