PRStatus
nsSOCKSSocketInfo::WriteV5AuthRequest()
{
NS_ABORT_IF_FALSE(mVersion == 5, "SOCKS version must be 5!");
mState = SOCKS5_WRITE_AUTH_REQUEST;
// Send an initial SOCKS 5 greeting
LOGDEBUG(("socks5: sending auth methods"));
WriteUint8(0x05); // version -- 5
WriteUint8(0x01); // # auth methods -- 1
WriteUint8(0x00); // we don't support authentication
return PR_SUCCESS;
}
PRStatus
nsSOCKSSocketInfo::WriteV4ConnectRequest()
{
PRNetAddr *addr = &mDestinationAddr;
int32_t proxy_resolve;
NS_ABORT_IF_FALSE(mState == SOCKS_CONNECTING_TO_PROXY,
"Invalid state!");
proxy_resolve = mFlags & nsISocketProvider::PROXY_RESOLVES_HOST;
mDataLength = 0;
mState = SOCKS4_WRITE_CONNECT_REQUEST;
LOGDEBUG(("socks4: sending connection request (socks4a resolve? %s)",
proxy_resolve? "yes" : "no"));
// Send a SOCKS 4 connect request.
WriteUint8(0x04); // version -- 4
WriteUint8(0x01); // command -- connect
WriteNetPort(addr);
if (proxy_resolve) {
// Add the full name, null-terminated, to the request
// according to SOCKS 4a. A fake IP address, with the first
// four bytes set to 0 and the last byte set to something other
// than 0, is used to notify the proxy that this is a SOCKS 4a
// request. This request type works for Tor and perhaps others.
WriteUint32(PR_htonl(0x00000001)); // Fake IP
WriteUint8(0x00); // Send an emtpy username
if (mDestinationHost.Length() > MAX_HOSTNAME_LEN) {
LOGERROR(("socks4: destination host name is too long!"));
HandshakeFinished(PR_BAD_ADDRESS_ERROR);
return PR_FAILURE;
}
WriteString(mDestinationHost); // Hostname
WriteUint8(0x00);
} else if (PR_NetAddrFamily(addr) == PR_AF_INET) {
WriteNetAddr(addr); // Add the IPv4 address
WriteUint8(0x00); // Send an emtpy username
} else if (PR_NetAddrFamily(addr) == PR_AF_INET6) {
LOGERROR(("socks: SOCKS 4 can't handle IPv6 addresses!"));
HandshakeFinished(PR_BAD_ADDRESS_ERROR);
return PR_FAILURE;
}
return PR_SUCCESS;
}
PRStatus
nsSOCKSSocketInfo::WriteV5ConnectRequest()
{
// Send SOCKS 5 connect request
PRNetAddr *addr = &mDestinationAddr;
int32_t proxy_resolve;
proxy_resolve = mFlags & nsISocketProvider::PROXY_RESOLVES_HOST;
LOGDEBUG(("socks5: sending connection request (socks5 resolve? %s)",
proxy_resolve? "yes" : "no"));
mDataLength = 0;
mState = SOCKS5_WRITE_CONNECT_REQUEST;
WriteUint8(0x05); // version -- 5
WriteUint8(0x01); // command -- connect
WriteUint8(0x00); // reserved
// Add the address to the SOCKS 5 request. SOCKS 5 supports several
// address types, so we pick the one that works best for us.
if (proxy_resolve) {
// Add the host name. Only a single byte is used to store the length,
// so we must prevent long names from being used.
if (mDestinationHost.Length() > MAX_HOSTNAME_LEN) {
LOGERROR(("socks5: destination host name is too long!"));
HandshakeFinished(PR_BAD_ADDRESS_ERROR);
return PR_FAILURE;
}
WriteUint8(0x03); // addr type -- domainname
WriteUint8(mDestinationHost.Length()); // name length
WriteString(mDestinationHost);
} else if (PR_NetAddrFamily(addr) == PR_AF_INET) {
WriteUint8(0x01); // addr type -- IPv4
WriteNetAddr(addr);
} else if (PR_NetAddrFamily(addr) == PR_AF_INET6) {
WriteUint8(0x04); // addr type -- IPv6
WriteNetAddr(addr);
} else {
LOGERROR(("socks5: destination address of unknown type!"));
HandshakeFinished(PR_BAD_ADDRESS_ERROR);
return PR_FAILURE;
}
WriteNetPort(addr); // port
return PR_SUCCESS;
}
/**
* This method encodes and writes an `int8_t` value to current input frame.
*
* Before using this method `BeginFrame()` must be called to start and prepare a new input frame. Otherwise, this
* method does nothing and returns error status `OT_ERROR_INVALID_STATE`.
*
* If no buffer space is available, this method will discard and clear the current input frame and return the
* error status `OT_ERROR_NO_BUFS`.
*
* @param[in] aInt8 The value to add to input frame.
*
* @retval OT_ERROR_NONE Successfully added given value to the frame.
* @retval OT_ERROR_NO_BUFS Insufficient buffer space available to add the value.
* @retval OT_ERROR_INVALID_STATE `BeginFrame()` has not been called earlier to start the frame.
*
*/
otError WriteInt8(int8_t aInt8) { return WriteUint8(static_cast<uint8_t>(aInt8)); }
