EADDRINUSE 48 address-in-use-error
EADDRNOTAVAIL 49 address-not-available-error
EAGAIN interrupted-error  ;; not 1 error code: bsd == 11; non-bsd == 35
EBADF 9 bad-file-descriptor-error
ECONNREFUSED 61 connection-refused-error
EINTR 4 interrupted-error
EINVAL 22 invalid-argument-error
ENOBUFS 55 no-buffers-error
ENOMEM 12 out-of-memory-error
EOPNOTSUPP 45 operation-not-supported-error
EPERM 1 operation-not-permitted-error
EPROTONOSUPPORT 43 protocol-not-supported-error
ESOCKTNOSUPPORT 44 socket-type-not-supported-error
ENETUNREACH 51 network-unreachable-error
ENETDOWN 50 network-down-error
ENETRESET 52 network-reset-error
ESHUTDOWN 58 already-shutdown-error
ETIMEDOUT 60 connection-timeout-error
EHOSTDOWN 64 host-down-error
EHOSTUNREACH 65 host-unreachable-error