CWE-ou-minkata/Sources/Plasma/NucleusLib/pnUtils/Win32/pnUtW32Addr.cpp

/*==LICENSE==*

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*==LICENSE==*/
/*****************************************************************************
*
*   $/Plasma20/Sources/Plasma/NucleusLib/pnUtils/Private/Win32/pnUtW32Addr.cpp
*   
***/

#include "../pnUtils.h"


/*****************************************************************************
*
*   Internal functions
*
***/

//===========================================================================
static NetAddressNode NodeFromString (const wchar_t * string[]) {
    // skip leading whitespace
    const wchar_t * str = *string;
    while (iswspace(*str))
        ++str;

    // This function handles partial ip addresses (61.33)
    // as well as full dotted quads. The address can be
    // terminated by whitespace or ':' as well as '\0'
    uint8_t data[4];
    * (uint32_t *) data = 0;
    for (unsigned i = sizeof(data); i--; ) {
        if (!iswdigit(*str))
            return (unsigned)-1;

        unsigned value = StrToUnsigned(str, &str, 10);
        if (value >= 256)
            return (unsigned)-1;
        data[i] = (uint8_t) value;

        if (!*str || (*str == ':') || iswspace(*str))
            break;

        static const wchar_t s_separator[] = L"\0...";
        if (*str++ != s_separator[i])
            return (unsigned)-1;
    }

    *string = str;
    return * (NetAddressNode *) &data[0];
}


/*****************************************************************************
*
*   Exports
*
***/

//===========================================================================
int NetAddressCompare (const NetAddress & a1, const NetAddress & a2) {
    const sockaddr_in & i1 = * (const sockaddr_in *) &a1;
    const sockaddr_in & i2 = * (const sockaddr_in *) &a2;

    int   d = i1.sin_addr.S_un.S_addr - i2.sin_addr.S_un.S_addr;
    return d ? d : i1.sin_port - i2.sin_port;
}

//===========================================================================
void NetAddressToString (
    const NetAddress &  addr, 
    wchar_t *             str, 
    unsigned            chars, 
    ENetAddressFormat   format
) {
    ASSERT(str);

    static const wchar_t * s_fmts[] = {
        L"%S",      // kNetAddressFormatNodeNumber
        L"%S:%u",   // kNetAddressFormatAll
    };
    ASSERT(format < arrsize(s_fmts));
    const sockaddr_in & inetaddr = * (const sockaddr_in *) &addr;
    StrPrintf(
        str,
        chars,
        s_fmts[format],
        inet_ntoa(inetaddr.sin_addr),
        ntohs(inetaddr.sin_port)
    );
}

//===========================================================================
bool NetAddressFromString (NetAddress * addr, const wchar_t str[], unsigned defaultPort) {
    ASSERT(addr);
    ASSERT(str);

    // NetAddress is bigger than sockaddr_in so start by zeroing the whole thing
    memset(addr, 0, sizeof(*addr));
    
    for (;;) {
        NetAddressNode node = NodeFromString(&str);
        if (node == (unsigned)-1)
            break;

        if (*str == L':')
            defaultPort = StrToUnsigned(str + 1, nil, 10);
   
        sockaddr_in * inetaddr          = (sockaddr_in *) addr;
        inetaddr->sin_family            = AF_INET;
        inetaddr->sin_port              = htons((uint16_t) defaultPort);
        inetaddr->sin_addr.S_un.S_addr  = htonl(node);
        // inetaddr->sin_zero already zeroed

        return true;
    }

    // address already zeroed
    return false;
}

//===========================================================================
unsigned NetAddressGetPort (
    const NetAddress & addr
) {
    return ntohs(((sockaddr_in *) &addr)->sin_port);
}

//===========================================================================
void NetAddressSetPort (
    unsigned        port,
    NetAddress *    addr
) {
    ((sockaddr_in *) addr)->sin_port = htons((uint16_t) port);
}

//============================================================================
NetAddressNode NetAddressGetNode (const NetAddress & addr) {
    return ntohl(((const sockaddr_in *) &addr)->sin_addr.S_un.S_addr);
}

//===========================================================================
void NetAddressFromNode (
    NetAddressNode  node,
    unsigned        port,
    NetAddress *    addr
) {
    memset(addr, 0, sizeof(*addr));
    sockaddr_in * inetaddr          = (sockaddr_in *) addr;
    inetaddr->sin_family            = AF_INET;
    inetaddr->sin_addr.S_un.S_addr  = htonl(node);
    inetaddr->sin_port              = htons((uint16_t) port);
}

//===========================================================================
void NetAddressNodeToString (
    NetAddressNode  node,
    wchar_t *         str,
    unsigned        chars
) {
    in_addr addr;
    addr.S_un.S_addr = htonl(node);
    StrPrintf(str, chars, L"%S", inet_ntoa(addr));
}