gboolean
Socket_Send(SOCKET fd, // IN
char *buf, // IN
int len) // IN
{
int left = len;
int sent = 0;
int rv;
int sysErr;
while (left > 0) {
rv = send(fd, buf + sent, left, 0);
if (rv == SOCKET_ERROR) {
sysErr = SocketGetLastError();
if (sysErr == SYSERR_EINTR) {
continue;
}
Warning(LGPFX "Send error for socket %d: %d[%s]", fd, sysErr,
Err_Errno2String(sysErr));
return FALSE;
}
left -= rv;
sent += rv;
}
Debug(LGPFX "Sent %d bytes from socket %d\n", len, fd);
return TRUE;
}
gboolean
Socket_Recv(SOCKET fd, // IN
char *buf, // OUT
int len) // IN
{
int remaining = len;
int rv;
int sysErr;
while (remaining > 0) {
rv = recv(fd, buf , remaining, 0);
if (rv == 0) {
Warning(LGPFX "Socket %d closed by peer.", fd);
return FALSE;
}
if (rv == SOCKET_ERROR) {
sysErr = SocketGetLastError();
if (sysErr == SYSERR_EINTR) {
continue;
}
Warning(LGPFX "Recv error for socket %d: %d[%s]", fd, sysErr,
Err_Errno2String(sysErr));
return FALSE;
}
remaining -= rv;
buf += rv;
}
Debug(LGPFX "Recved %d bytes from socket %d\n", len, fd);
return TRUE;
}
static gboolean
SocketCleanup(void)
{
#if defined(_WIN32)
int err = WSACleanup();
if (err) {
Warning(LGPFX "Error in WSACleanup: %d[%s]\n", err,
Err_Errno2String(err));
return FALSE;
}
#endif
return TRUE;
}
void
Socket_Close(SOCKET sock)
{
int res;
#if defined(_WIN32)
res = closesocket(sock);
#else
res = close(sock);
#endif
if (res == SOCKET_ERROR) {
int err = SocketGetLastError();
Warning(LGPFX "Error in closing socket %d: %d[%s]\n",
sock, err, Err_Errno2String(err));
}
SocketCleanup();
}
static gboolean
SocketStartup(void)
{
#if defined(_WIN32)
int err;
WSADATA wsaData;
err = WSAStartup(MAKEWORD(2, 0), &wsaData);
if (err) {
Warning(LGPFX "Error in WSAStartup: %d[%s]\n", err,
Err_Errno2String(err));
return FALSE;
}
if (2 != LOBYTE(wsaData.wVersion) || 0 != HIBYTE(wsaData.wVersion)) {
Warning(LGPFX "Unsupported Winsock version %d.%d\n",
LOBYTE(wsaData.wVersion), HIBYTE(wsaData.wVersion));
return FALSE;
}
#endif
return TRUE;
}
const char *
Err_ErrString(void)
{
return Err_Errno2String(errno);
}
SOCKET
Socket_ConnectVMCI(unsigned int cid, // IN
unsigned int port, // IN
gboolean isPriv, // IN
SockConnError *outError) // OUT
{
struct sockaddr_vm addr;
SOCKET fd;
SockConnError error = SOCKERR_GENERIC;
int sysErr;
socklen_t addrLen = sizeof addr;
int vsockDev = -1;
int family = VMCISock_GetAFValueFd(&vsockDev);
if (outError) {
*outError = SOCKERR_SUCCESS;
}
if (!SocketStartup()) {
goto error;
}
if (family == -1) {
Warning(LGPFX "Couldn't get VMCI socket family info.");
goto error;
}
memset((char *)&addr, 0, sizeof addr);
addr.svm_family = family;
addr.svm_cid = cid;
addr.svm_port = port;
Debug(LGPFX "creating new socket, connecting to %u:%u\n", cid, port);
fd = socket(addr.svm_family, SOCK_STREAM, 0);
if (fd == INVALID_SOCKET) {
sysErr = SocketGetLastError();
Warning(LGPFX "failed to create socket, error %d: %s\n",
sysErr, Err_Errno2String(sysErr));
goto error;
}
if (isPriv) {
struct sockaddr_vm localAddr;
gboolean bindOk = FALSE;
int localPort;
memset(&localAddr, 0, sizeof localAddr);
localAddr.svm_family = addr.svm_family;
localAddr.svm_cid = VMCISock_GetLocalCID();
/* Try to bind to port 1~1023 for a privileged user. */
for (localPort = PRIVILEGED_PORT_MAX;
localPort >= PRIVILEGED_PORT_MIN; localPort--) {
localAddr.svm_port = localPort;
if (bind(fd, (struct sockaddr *)&localAddr, sizeof localAddr) != 0) {
sysErr = SocketGetLastError();
if (sysErr == SYSERR_EACCESS) {
Warning(LGPFX "Couldn't bind to privileged port for "
"socket %d\n", fd);
error = SOCKERR_EACCESS;
Socket_Close(fd);
goto error;
}
if (sysErr == SYSERR_EADDRINUSE) {
continue;
}
Warning(LGPFX "could not bind socket, error %d: %s\n", sysErr,
Err_Errno2String(sysErr));
Socket_Close(fd);
error = SOCKERR_BIND;
goto error;
} else {
bindOk = TRUE;
break;
}
}
if (!bindOk) {
Warning(LGPFX "Failed to bind to privileged port for socket %d, "
"no port available\n", fd);
error = SOCKERR_BIND;
Socket_Close(fd);
goto error;
} else {
Debug(LGPFX "Successfully bound to port %d for socket %d\n",
localAddr.svm_port, fd);
}
}
if (connect(fd, (struct sockaddr *)&addr, addrLen) != 0) {
sysErr = SocketGetLastError();
Warning(LGPFX "socket connect failed, error %d: %s\n",
sysErr, Err_Errno2String(sysErr));
Socket_Close(fd);
error = SOCKERR_CONNECT;
goto error;
}
VMCISock_ReleaseAFValueFd(vsockDev);
Debug(LGPFX "socket %d connected\n", fd);
return fd;
error:
if (outError) {
*outError = error;
}
VMCISock_ReleaseAFValueFd(vsockDev);
return INVALID_SOCKET;
}
const char *
Err_ErrString(void)
{
return Err_Errno2String(Err_Errno());
}
