ResendLastRPCToTarget 

Namespace: SynicSugar.P2P
Class: ConnectHub

public void ResendLastRPCToTarget(UserId target)

Description 

Re-Send RPC to the specific target with last recorded information.
This TargetRPC payload is the same as the last RPC.
To send disconnected peers after some time. SynicSugar retransmit to connecting-peers like TCP.
To record, pass true to attribute.

using SynicSugar.P2P;
using UnityEngine;

public class p2pSample : MonoBehaviour {
    void Start() {
        p2pInfo.Instance.ConnectionNotifier.Connected += OnConnected;
    }
    public void OnConenction() {
        if(p2pInfo.Instance.LastRPCch != (byte)ConnectHub.CHANNELLIST.ImportantSyncProcess){
            return;
        }
        ConnectHub.Instance.ResendLastRPC(p2pInfo.Instance.LastConnectedUsersId);
    }
}