package salticidae // #include // #include "salticidae/netaddr.h" import "C" import "runtime" // The C pointer type for a NetAddr object type CNetAddr = *C.netaddr_t type netAddr struct { inner CNetAddr } // Network address object. type NetAddr = *netAddr // Convert an existing C pointer into a go object. Notice that when the go // object does *not* own the resource of the C pointer, so it is only valid to // the extent in which the given C pointer is valid. The C memory will not be // deallocated when the go object is finalized by GC. This applies to all other // "FromC" functions. func NetAddrFromC(ptr CNetAddr) NetAddr { return &netAddr{ inner: ptr } } type netAddrArray struct { inner *C.netaddr_array_t } // An array of network address. type NetAddrArray = *netAddrArray // Create NetAddr from a TCP socket format string (e.g. 127.0.0.1:8888). func NewAddrFromIPPortString(addr string) (res NetAddr) { c_str := C.CString(addr) res = &netAddr{ inner: C.netaddr_new_from_sipport(c_str) } C.free(rawptr_t(c_str)) runtime.SetFinalizer(res, func(self NetAddr) { self.free() }) return } // Convert a Go slice of net addresses to NetAddrArray. func NewAddrArrayFromAddrs(arr []NetAddr) (res NetAddrArray) { size := len(arr) if size > 0 { // FIXME: here we assume struct of a single pointer has the same memory // footprint the pointer base := (**C.netaddr_t)(rawptr_t(&arr[0])) res = &netAddrArray{ inner: C.netaddr_array_new_from_addrs(base, C.size_t(size)) } } else { res = &netAddrArray{ inner: C.netaddr_array_new() } } runtime.SetFinalizer(res, func(self NetAddrArray) { self.free() }) return } func (self NetAddr) free() { C.netaddr_free(self.inner) } // Check if two addresses are the same. func (self NetAddr) IsEq(other NetAddr) bool { return bool(C.netaddr_is_eq(self.inner, other.inner)) } func (self NetAddr) IsNull() bool { return bool(C.netaddr_is_null(self.inner)) } // Get the 32-bit IP representation. func (self NetAddr) GetIP() uint32 { return uint32(C.netaddr_get_ip(self.inner)) } // Get the 16-bit port number (in UNIX network byte order, so need to apply // ntohs(), for example, to convert the returned integer to the local endianness). func (self NetAddr) GetPort() uint16 { return uint16(C.netaddr_get_port(self.inner)) } // Make a copy of the object. This is required if you want to keep the NetAddr // returned (or passed as a callback parameter) by other salticidae methods // (such like MsgNetwork/PeerNetwork), unless those method return a moved object. func (self NetAddr) Copy() NetAddr { res := &netAddr{ inner: C.netaddr_copy(self.inner) } runtime.SetFinalizer(res, func(self NetAddr) { self.free() }) return res } func (self NetAddrArray) free() { C.netaddr_array_free(self.inner) }