Will this work around fix the undefined htonl which causes the different port bug?

[curveddesign]

    let isLittleEndian = Int(OSHostByteOrder()) == OSLittleEndian

    let htons  = isLittleEndian ? _OSSwapInt16 : { $0 }
    let htonl  = isLittleEndian ? _OSSwapInt32 : { $0 }
    let htonll = isLittleEndian ? _OSSwapInt64 : { $0 }
    let ntohs  = isLittleEndian ? _OSSwapInt16 : { $0 }
    let ntohl  = isLittleEndian ? _OSSwapInt32 : { $0 }
    let ntohll = isLittleEndian ? _OSSwapInt64 : { $0 }

[curveddesign]

I know nothing about sockets but I think I fixed the port problem!

I changed this...

    // Can't find htonl(...) function in Swift runtime so port value will be diffrent.
    var addr = sockaddr_in(sin_len: __uint8_t(sizeof(sockaddr_in)), sin_family: sa_family_t(AF_INET),
    sin_port: port, sin_addr: in_addr(s_addr: inet_addr("0.0.0.0")), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))

To this... ( I added htons, defined above, to the sin_port )

    // Can't find htonl(...) function in Swift runtime so port value will be diffrent.
    var addr = sockaddr_in(sin_len: __uint8_t(sizeof(sockaddr_in)), sin_family: sa_family_t(AF_INET),
    sin_port: htons(port), sin_addr: in_addr(s_addr: inet_addr("0.0.0.0")), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))

[damian-kolakowski]

Super !

I pushed your fix: 30acc44

Best