sdp_port 139 include/linux/netfilter/nf_conntrack_sip.h unsigned int (*sdp_port)(struct sk_buff *skb, sdp_port 951 net/netfilter/nf_conntrack_sip.c !hooks->sdp_port(skb, protoff, dataoff, dptr, datalen, sdp_port 673 net/netfilter/nf_nat_sip.c .sdp_port = nf_nat_sdp_port,