MsgInteract

This message is used to request an interaction with another player or broadcast an interaction to surrounding players. Some example interactions include physical and magical attacks, proposing, and killing a player.

Magic attacks in Conquer Online are obfuscated using bit rotations and XORs. See the example below from Soul.

#define ENCODE_MAGICATTACK(idUser, usType, idTarget, usPosX, usPosY)                           \
{                                                                                              \
    usType = (::ExchangeShortBits((usType - 0x14BE), 3) ^ (idUser) ^ 0x915D);                  \
    idTarget = ::ExchangeLongBits(((idTarget - 0x8B90B51A) ^ (idUser) ^ 0x5F2D2463), 32 - 13); \
    usPosX = (::ExchangeShortBits((usPosX - 0xDD12), 1) ^ (idUser) ^ 0x2ED6);                  \
    usPosY = (::ExchangeShortBits((usPosY - 0x76DE), 5) ^ (idUser) ^ 0xB99B);                  \
}

#define DECODE_MAGICATTACK(idUser, usType, idTarget, usPosX, usPosY)                          \
{                                                                                             \
    usType = 0xFFFF & (::ExchangeShortBits(((usType) ^ (idUser) ^ 0x915D), 16 - 3) + 0x14BE); \
    idTarget = (::ExchangeLongBits((idTarget), 13) ^ (idUser) ^ 0x5F2D2463) + 0x8B90B51A;     \
    usPosX = 0xFFFF & (::ExchangeShortBits(((usPosX) ^ (idUser) ^ 0x2ED6), 16 - 1) + 0xDD12); \
    usPosY = 0xFFFF & (::ExchangeShortBits(((usPosY) ^ (idUser) ^ 0xB99B), 16 - 5) + 0x76DE); \
}

inline unsigned int ExchangeShortBits(unsigned long nData, int nBits)
{
    MYASSERT(nBits >= 0 && nBits < 16);
    nData &= 0xFFFF;
    return ((nData >> nBits) | (nData << (16 - nBits))) & 0xFFFF;
}

inline unsigned int ExchangeLongBits(unsigned long nData, int nBits)
{
    MYASSERT(nBits >= 0 && nBits < 32);
    return (nData >> nBits) | (nData << (32 - nBits));
}

Similar to other messages, MsgInteract also contains types that overlap with other types in other messages. For example, aborting magic was handled in MsgInteract, but is instead duplicated and utilized in MsgAction.

Table of Contents

• Patch 4267
• Patch 5017

Patch 4267

Message Definition

☑️ Assumed (Observed) - CoFuture + Soul

Interaction Type

☑️ Assumed (Observed) - CoFuture + Soul

🔶 Response data

Patch 5017

Message Definition

☑️ Assumed (Observed) - COPSv6

Interaction Type

☑️ Assumed (Observed) - COPSv6

🔶 Response data