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barrier/net/CNetwork.cpp

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#include "CNetwork.h"
#include "XNetwork.h"
#include "CLog.h"
//
// CNetwork
//
CNetwork::Socket (PASCAL FAR *CNetwork::accept)(CNetwork::Socket s, CNetwork::Address FAR *addr, CNetwork::AddressLength FAR *addrlen);
int (PASCAL FAR *CNetwork::bind)(CNetwork::Socket s, const CNetwork::Address FAR *addr, CNetwork::AddressLength namelen);
int (PASCAL FAR *CNetwork::close)(CNetwork::Socket s);
int (PASCAL FAR *CNetwork::connect)(CNetwork::Socket s, const CNetwork::Address FAR *name, CNetwork::AddressLength namelen);
int (PASCAL FAR *CNetwork::ioctl)(CNetwork::Socket s, int cmd, ...);
int (PASCAL FAR *CNetwork::getpeername)(CNetwork::Socket s, CNetwork::Address FAR *name, CNetwork::AddressLength FAR * namelen);
int (PASCAL FAR *CNetwork::getsockname)(CNetwork::Socket s, CNetwork::Address FAR *name, CNetwork::AddressLength FAR * namelen);
int (PASCAL FAR *CNetwork::getsockopt)(CNetwork::Socket s, int level, int optname, void FAR * optval, CNetwork::AddressLength FAR *optlen);
unsigned long (PASCAL FAR *CNetwork::inet_addr)(const char FAR * cp);
char FAR * (PASCAL FAR *CNetwork::inet_ntoa)(struct in_addr in);
int (PASCAL FAR *CNetwork::listen)(CNetwork::Socket s, int backlog);
ssize_t (PASCAL FAR *CNetwork::read)(CNetwork::Socket s, void FAR * buf, size_t len);
ssize_t (PASCAL FAR *CNetwork::recv)(CNetwork::Socket s, void FAR * buf, size_t len, int flags);
ssize_t (PASCAL FAR *CNetwork::recvfrom)(CNetwork::Socket s, void FAR * buf, size_t len, int flags, CNetwork::Address FAR *from, CNetwork::AddressLength FAR * fromlen);
int (PASCAL FAR *CNetwork::poll)(CNetwork::PollEntry fds[], int nfds, int timeout);
ssize_t (PASCAL FAR *CNetwork::send)(CNetwork::Socket s, const void FAR * buf, size_t len, int flags);
ssize_t (PASCAL FAR *CNetwork::sendto)(CNetwork::Socket s, const void FAR * buf, size_t len, int flags, const CNetwork::Address FAR *to, CNetwork::AddressLength tolen);
int (PASCAL FAR *CNetwork::setsockopt)(CNetwork::Socket s, int level, int optname, const void FAR * optval, CNetwork::AddressLength optlen);
int (PASCAL FAR *CNetwork::shutdown)(CNetwork::Socket s, int how);
CNetwork::Socket (PASCAL FAR *CNetwork::socket)(int af, int type, int protocol);
ssize_t (PASCAL FAR *CNetwork::write)(CNetwork::Socket s, const void FAR * buf, size_t len);
struct hostent FAR * (PASCAL FAR *CNetwork::gethostbyaddr)(const char FAR * addr, int len, int type);
struct hostent FAR * (PASCAL FAR *CNetwork::gethostbyname)(const char FAR * name);
int (PASCAL FAR *CNetwork::gethostname)(char FAR * name, int namelen);
struct servent FAR * (PASCAL FAR *CNetwork::getservbyport)(int port, const char FAR * proto);
struct servent FAR * (PASCAL FAR *CNetwork::getservbyname)(const char FAR * name, const char FAR * proto);
struct protoent FAR * (PASCAL FAR *CNetwork::getprotobynumber)(int proto);
struct protoent FAR * (PASCAL FAR *CNetwork::getprotobyname)(const char FAR * name);
int (PASCAL FAR *CNetwork::getsockerror)(void);
int (PASCAL FAR *CNetwork::gethosterror)(void);
#if WINDOWS_LIKE
int (PASCAL FAR *CNetwork::select)(int nfds, fd_set FAR *readfds, fd_set FAR *writefds, fd_set FAR *exceptfds, const struct timeval FAR *timeout);
int (PASCAL FAR *CNetwork::WSACleanup)(void);
int (PASCAL FAR *CNetwork::__WSAFDIsSet)(CNetwork::Socket, fd_set FAR *);
const int CNetwork::Error = SOCKET_ERROR;
const CNetwork::Socket CNetwork::Null = INVALID_SOCKET;
#undef FD_ISSET
#define FD_ISSET(fd, set) CNetwork::__WSAFDIsSet((SOCKET)(fd), (fd_set FAR *)(set))
static HMODULE s_networkModule = NULL;
static
FARPROC
netGetProcAddress(HMODULE module, LPCSTR name)
{
FARPROC func = ::GetProcAddress(module, name);
if (!func) {
throw XNetworkFunctionUnavailable(name);
}
return func;
}
void
CNetwork::init()
{
assert(WSACleanup == NULL);
assert(s_networkModule == NULL);
// try winsock 2
HMODULE module = (HMODULE)::LoadLibrary("ws2_32.dll");
if (module == NULL) {
log((CLOG_NOTE "ws2_32.dll not found"));
}
else {
try {
init2(module);
return;
}
catch (XNetwork& e) {
log((CLOG_NOTE "ws2_32.dll error: %s", e.what()));
}
}
// try winsock 1
module = (HMODULE)::LoadLibrary("wsock32.dll");
if (module == NULL) {
log((CLOG_NOTE "wsock32.dll not found"));
}
else {
try {
init2(module);
return;
}
catch (XNetwork& e) {
log((CLOG_NOTE "wsock32.dll error: %s", e.what()));
}
}
// no networking
throw XNetworkUnavailable();
}
void
CNetwork::cleanup()
{
if (s_networkModule != NULL) {
WSACleanup();
::FreeLibrary(s_networkModule);
WSACleanup = NULL;
s_networkModule = NULL;
}
}
UInt32
CNetwork::swaphtonl(UInt32 v)
{
static const union { UInt16 s; UInt8 b[2]; } s_endian = { 0x1234 };
if (s_endian.b[0] == 0x34) {
return ((v & 0xff000000lu) >> 24) |
((v & 0x00ff0000lu) >> 8) |
((v & 0x0000ff00lu) << 8) |
((v & 0x000000fflu) << 24);
}
else {
return v;
}
}
UInt16
CNetwork::swaphtons(UInt16 v)
{
static const union { UInt16 s; UInt8 b[2]; } s_endian = { 0x1234 };
if (s_endian.b[0] == 0x34) {
return static_cast<UInt16>( ((v & 0xff00u) >> 8) |
((v & 0x00ffu) << 8));
}
else {
return v;
}
}
UInt32
CNetwork::swapntohl(UInt32 v)
{
return swaphtonl(v);
}
UInt16
CNetwork::swapntohs(UInt16 v)
{
return swaphtons(v);
}
#define setfunc(var, name, type) var = (type)netGetProcAddress(module, #name)
void
CNetwork::init2(
HMODULE module)
{
assert(module != NULL);
// get startup function address
int (PASCAL FAR *startup)(WORD, LPWSADATA);
setfunc(startup, WSAStartup, int(PASCAL FAR*)(WORD, LPWSADATA));
// startup network library
WORD version = MAKEWORD(1 /*major*/, 1 /*minor*/);
WSADATA data;
int err = startup(version, &data);
if (data.wVersion != version) {
throw XNetworkVersion(LOBYTE(data.wVersion), HIBYTE(data.wVersion));
}
if (err != 0) {
throw XNetworkFailed();
}
// get function addresses
setfunc(accept, accept, Socket (PASCAL FAR *)(Socket s, Address FAR *addr, AddressLength FAR *addrlen));
setfunc(bind, bind, int (PASCAL FAR *)(Socket s, const Address FAR *addr, AddressLength namelen));
setfunc(close, closesocket, int (PASCAL FAR *)(Socket s));
setfunc(connect, connect, int (PASCAL FAR *)(Socket s, const Address FAR *name, AddressLength namelen));
setfunc(ioctl, ioctlsocket, int (PASCAL FAR *)(Socket s, int cmd, ...));
setfunc(getpeername, getpeername, int (PASCAL FAR *)(Socket s, Address FAR *name, AddressLength FAR * namelen));
setfunc(getsockname, getsockname, int (PASCAL FAR *)(Socket s, Address FAR *name, AddressLength FAR * namelen));
setfunc(getsockopt, getsockopt, int (PASCAL FAR *)(Socket s, int level, int optname, void FAR * optval, AddressLength FAR *optlen));
setfunc(inet_addr, inet_addr, unsigned long (PASCAL FAR *)(const char FAR * cp));
setfunc(inet_ntoa, inet_ntoa, char FAR * (PASCAL FAR *)(struct in_addr in));
setfunc(listen, listen, int (PASCAL FAR *)(Socket s, int backlog));
setfunc(recv, recv, ssize_t (PASCAL FAR *)(Socket s, void FAR * buf, size_t len, int flags));
setfunc(recvfrom, recvfrom, ssize_t (PASCAL FAR *)(Socket s, void FAR * buf, size_t len, int flags, Address FAR *from, AddressLength FAR * fromlen));
setfunc(send, send, ssize_t (PASCAL FAR *)(Socket s, const void FAR * buf, size_t len, int flags));
setfunc(sendto, sendto, ssize_t (PASCAL FAR *)(Socket s, const void FAR * buf, size_t len, int flags, const Address FAR *to, AddressLength tolen));
setfunc(setsockopt, setsockopt, int (PASCAL FAR *)(Socket s, int level, int optname, const void FAR * optval, AddressLength optlen));
setfunc(shutdown, shutdown, int (PASCAL FAR *)(Socket s, int how));
setfunc(socket, socket, Socket (PASCAL FAR *)(int af, int type, int protocol));
setfunc(gethostbyaddr, gethostbyaddr, struct hostent FAR * (PASCAL FAR *)(const char FAR * addr, int len, int type));
setfunc(gethostbyname, gethostbyname, struct hostent FAR * (PASCAL FAR *)(const char FAR * name));
setfunc(gethostname, gethostname, int (PASCAL FAR *)(char FAR * name, int namelen));
setfunc(getservbyport, getservbyport, struct servent FAR * (PASCAL FAR *)(int port, const char FAR * proto));
setfunc(getservbyname, getservbyname, struct servent FAR * (PASCAL FAR *)(const char FAR * name, const char FAR * proto));
setfunc(getprotobynumber, getprotobynumber, struct protoent FAR * (PASCAL FAR *)(int proto));
setfunc(getprotobyname, getprotobyname, struct protoent FAR * (PASCAL FAR *)(const char FAR * name));
setfunc(getsockerror, WSAGetLastError, int (PASCAL FAR *)(void));
setfunc(gethosterror, WSAGetLastError, int (PASCAL FAR *)(void));
setfunc(WSACleanup, WSACleanup, int (PASCAL FAR *)(void));
setfunc(__WSAFDIsSet, __WSAFDIsSet, int (PASCAL FAR *)(CNetwork::Socket, fd_set FAR *));
setfunc(select, select, int (PASCAL FAR *)(int nfds, fd_set FAR *readfds, fd_set FAR *writefds, fd_set FAR *exceptfds, const struct timeval FAR *timeout));
poll = poll2;
read = read2;
write = write2;
s_networkModule = module;
}
int PASCAL FAR
CNetwork::poll2(PollEntry fd[], int nfds, int timeout)
{
int i;
// prepare sets for select
fd_set readSet, writeSet, errSet;
fd_set* readSetP = NULL;
fd_set* writeSetP = NULL;
fd_set* errSetP = NULL;
FD_ZERO(&readSet);
FD_ZERO(&writeSet);
FD_ZERO(&errSet);
for (i = 0; i < nfds; ++i) {
if (fd[i].events & kPOLLIN) {
FD_SET(fd[i].fd, &readSet);
readSetP = &readSet;
}
if (fd[i].events & kPOLLOUT) {
FD_SET(fd[i].fd, &writeSet);
writeSetP = &writeSet;
}
if (true) {
FD_SET(fd[i].fd, &errSet);
errSetP = &errSet;
}
}
// prepare timeout for select
struct timeval timeout2;
struct timeval* timeout2P;
if (timeout < 0) {
timeout2P = NULL;
}
else {
timeout2P = &timeout2;
timeout2.tv_sec = timeout / 1000;
timeout2.tv_usec = 1000 * (timeout % 1000);
}
// do the select. note that winsock ignores the first argument.
int n = select(0, readSetP, writeSetP, errSetP, timeout2P);
// handle results
if (n == Error) {
return Error;
}
if (n == 0) {
return 0;
}
n = 0;
for (i = 0; i < nfds; ++i) {
fd[i].revents = 0;
if (FD_ISSET(fd[i].fd, &readSet)) {
fd[i].revents |= kPOLLIN;
}
if (FD_ISSET(fd[i].fd, &writeSet)) {
fd[i].revents |= kPOLLOUT;
}
if (FD_ISSET(fd[i].fd, &errSet)) {
fd[i].revents |= kPOLLERR;
}
if (fd[i].revents != 0) {
++n;
}
}
return n;
}
ssize_t PASCAL FAR
CNetwork::read2(Socket s, void FAR* buf, size_t len)
{
return recv(s, buf, len, 0);
}
ssize_t PASCAL FAR
CNetwork::write2(Socket s, const void FAR* buf, size_t len)
{
return send(s, buf, len, 0);
}
#endif
#if UNIX_LIKE
#include <unistd.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
// FIXME -- use reentrant versions of non-reentrant functions
#define setfunc(var, name, type) var = (type)::name
UInt32
CNetwork::swaphtonl(UInt32 v)
{
return htonl(v);
}
UInt16
CNetwork::swaphtons(UInt16 v)
{
return htons(v);
}
UInt32
CNetwork::swapntohl(UInt32 v)
{
return ntohl(v);
}
UInt16
CNetwork::swapntohs(UInt16 v)
{
return ntohs(v);
}
static
int
myerrno()
{
return errno;
}
static
int
myherrno()
{
return h_errno;
}
static
int
mygethostname(char* name, int namelen)
{
return gethostname(name, namelen);
}
const int CNetwork::Error = -1;
const CNetwork::Socket CNetwork::Null = -1;
void
CNetwork::init()
{
setfunc(accept, accept, Socket (PASCAL FAR *)(Socket s, Address FAR *addr, AddressLength FAR *addrlen));
setfunc(bind, bind, int (PASCAL FAR *)(Socket s, const Address FAR *addr, AddressLength namelen));
setfunc(close, close, int (PASCAL FAR *)(Socket s));
setfunc(connect, connect, int (PASCAL FAR *)(Socket s, const Address FAR *name, AddressLength namelen));
setfunc(ioctl, ioctl, int (PASCAL FAR *)(Socket s, int cmd, ...));
setfunc(getpeername, getpeername, int (PASCAL FAR *)(Socket s, Address FAR *name, AddressLength FAR * namelen));
setfunc(getsockname, getsockname, int (PASCAL FAR *)(Socket s, Address FAR *name, AddressLength FAR * namelen));
setfunc(getsockopt, getsockopt, int (PASCAL FAR *)(Socket s, int level, int optname, void FAR * optval, AddressLength FAR *optlen));
setfunc(inet_addr, inet_addr, unsigned long (PASCAL FAR *)(const char FAR * cp));
setfunc(inet_ntoa, inet_ntoa, char FAR * (PASCAL FAR *)(struct in_addr in));
setfunc(listen, listen, int (PASCAL FAR *)(Socket s, int backlog));
setfunc(poll, poll, int (PASCAL FAR *)(CNetwork::PollEntry fds[], int nfds, int timeout));
setfunc(read, read, ssize_t (PASCAL FAR *)(CNetwork::Socket s, void FAR * buf, size_t len));
setfunc(recv, recv, ssize_t (PASCAL FAR *)(Socket s, void FAR * buf, size_t len, int flags));
setfunc(recvfrom, recvfrom, ssize_t (PASCAL FAR *)(Socket s, void FAR * buf, size_t len, int flags, Address FAR *from, AddressLength FAR * fromlen));
setfunc(send, send, ssize_t (PASCAL FAR *)(Socket s, const void FAR * buf, size_t len, int flags));
setfunc(sendto, sendto, ssize_t (PASCAL FAR *)(Socket s, const void FAR * buf, size_t len, int flags, const Address FAR *to, AddressLength tolen));
setfunc(setsockopt, setsockopt, int (PASCAL FAR *)(Socket s, int level, int optname, const void FAR * optval, AddressLength optlen));
setfunc(shutdown, shutdown, int (PASCAL FAR *)(Socket s, int how));
setfunc(socket, socket, Socket (PASCAL FAR *)(int af, int type, int protocol));
setfunc(write, write, ssize_t (PASCAL FAR *)(CNetwork::Socket s, const void FAR * buf, size_t len));
setfunc(gethostbyaddr, gethostbyaddr, struct hostent FAR * (PASCAL FAR *)(const char FAR * addr, int len, int type));
setfunc(gethostbyname, gethostbyname, struct hostent FAR * (PASCAL FAR *)(const char FAR * name));
setfunc(gethostname, mygethostname, int (PASCAL FAR *)(char FAR * name, int namelen));
setfunc(getservbyport, getservbyport, struct servent FAR * (PASCAL FAR *)(int port, const char FAR * proto));
setfunc(getservbyname, getservbyname, struct servent FAR * (PASCAL FAR *)(const char FAR * name, const char FAR * proto));
setfunc(getprotobynumber, getprotobynumber, struct protoent FAR * (PASCAL FAR *)(int proto));
setfunc(getprotobyname, getprotobyname, struct protoent FAR * (PASCAL FAR *)(const char FAR * name));
setfunc(getsockerror, myerrno, int (PASCAL FAR *)(void));
setfunc(gethosterror, myherrno, int (PASCAL FAR *)(void));
}
void
CNetwork::cleanup()
{
// do nothing
}
#endif
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