sctp_packet_config
void sctp_packet_config(struct sctp_packet *, __u32 vtag, int);
sctp_packet_config(ctx->packet, ctx->asoc->peer.i.init_tag,
sctp_packet_config(&singleton, vtag, 0);
sctp_packet_config(ctx->packet,
sctp_packet_config(packet, vtag, 0);