Split packets

The concept of splitting data across multiple packets is used when its data might exceed 4090 bytes.
Usually such packets marked as Massive and parsed automatically by C# Silkroad Security API but there are some exceptions...

Opcode	Direction	Name
0x34A5	S → C	SERVER_AGENT_CHARACTER_INFO_BEGIN (Empty)
0x3013	S → C	SERVER_AGENT_CHARACTER_INFO_DATA
0x34A6	S → C	SERVER_AGENT_CHARACTER_INFO_END (Empty)

Opcode	Direction	Name
0x3017	S → C	SERVER_AGENT_ENTITY_GROUPSPAWN_BEGIN
0x3019	S → C	SERVER_AGENT_ENTITY_GROUPSPAWN_DATA
0x3018	S → C	SERVER_AGENT_ENTITY_GROUPSPAWN_END

Opcode	Direction	Name
0x34B3	S → C	SERVER_AGENT_GUILD_INFO_BEGIN
0x3101	S → C	SERVER_AGENT_GUILD_INFO_DATA
0x34B4	S → C	SERVER_AGENT_GUILD_INFO_END

Opcode	Direction	Name
0x3253	S → C	SERVER_AGENT_GUILD_STORAGE_BEGIN
0x3255	S → C	SERVER_AGENT_GUILD_STORAGE_DATA
0x3254	S → C	SERVER_AGENT_GUILD_STORAGE_END

Opcode	Direction	Name
0x3047	S → C	SERVER_AGENT_INVENTORY_STORAGE_BEGIN
0x3049	S → C	SERVER_AGENT_INVENTORY_STORAGE_DATA
0x3048	S → C	SERVER_AGENT_INVENTORY_STORAGE_END

The simplest strategy to parse these packets is to create a new temporary packet on _BEGIN add the bytes from the _DATA packet (there can be multiple) to it and handle it upon _END

Example:

private static Packet groupSpawnPacket;

//_BEGIN -> Create temporary packet and write header to it.
public static void EntityGroupSpawnBegin(Packet packet)
{
    groupSpawnPacket = new Packet(0x0000);
    groupSpawnPacket.WriteUInt8Array(packet.GetBytes());
}

//_DATA -> Write data to it
public static void EntityGroupSpawnData(Packet packet)
{
    groupSpawnPacket.WriteUInt8Array(packet.GetBytes());
}

//_END -> Handle temporary packet
public static void EntityGroupSpawnEnd(Packet packet)
{
    groupSpawnPacket.Lock();

    var groupSpawnType = groupSpawnPacket.ReadUInt8();
    var groupSpawnAmount = groupSpawnPacket.ReadInt16();
    for (int i = 0; i < groupSpawnAmount; i++)
    {
        if (groupSpawnType == 0x01)
        {
            //spawn
            parseEntity(groupSpawnPacket);
        }
        else
        {
            //despawn
            uint uniqueID = groupSpawnPacket.ReadInt32();
        }
    }
}