/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- * * ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Justin Bradford * Bradley Baetz * Darin Fisher * Malcolm Smith * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ #include "nspr.h" #include "nsString.h" #include "nsCRT.h" #include "nsIServiceManager.h" #include "nsIDNSService.h" #include "nsIDNSRecord.h" #include "nsISOCKSSocketInfo.h" #include "nsISocketProvider.h" #include "nsSOCKSIOLayer.h" #include "nsNetCID.h" static PRDescIdentity nsSOCKSIOLayerIdentity; static PRIOMethods nsSOCKSIOLayerMethods; static PRBool firstTime = PR_TRUE; #if defined(PR_LOGGING) static PRLogModuleInfo *gSOCKSLog; #define LOGDEBUG(args) PR_LOG(gSOCKSLog, PR_LOG_DEBUG, args) #define LOGERROR(args) PR_LOG(gSOCKSLog, PR_LOG_ERROR , args) #else #define LOGDEBUG(args) #define LOGERROR(args) #endif class nsSOCKSSocketInfo : public nsISOCKSSocketInfo { public: nsSOCKSSocketInfo(); virtual ~nsSOCKSSocketInfo() {} NS_DECL_ISUPPORTS NS_DECL_NSISOCKSSOCKETINFO void Init(PRInt32 version, const char *proxyHost, PRInt32 proxyPort, const char *destinationHost, PRUint32 flags); const nsCString &DestinationHost() { return mDestinationHost; } const nsCString &ProxyHost() { return mProxyHost; } PRInt32 ProxyPort() { return mProxyPort; } PRInt32 Version() { return mVersion; } PRUint32 Flags() { return mFlags; } private: nsCString mDestinationHost; nsCString mProxyHost; PRInt32 mProxyPort; PRInt32 mVersion; // SOCKS version 4 or 5 PRUint32 mFlags; PRNetAddr mInternalProxyAddr; PRNetAddr mExternalProxyAddr; PRNetAddr mDestinationAddr; }; nsSOCKSSocketInfo::nsSOCKSSocketInfo() : mProxyPort(-1) , mVersion(-1) , mFlags(0) { PR_InitializeNetAddr(PR_IpAddrAny, 0, &mInternalProxyAddr); PR_InitializeNetAddr(PR_IpAddrAny, 0, &mExternalProxyAddr); PR_InitializeNetAddr(PR_IpAddrAny, 0, &mDestinationAddr); } void nsSOCKSSocketInfo::Init(PRInt32 version, const char *proxyHost, PRInt32 proxyPort, const char *host, PRUint32 flags) { mVersion = version; mProxyHost = proxyHost; mProxyPort = proxyPort; mDestinationHost = host; mFlags = flags; } NS_IMPL_THREADSAFE_ISUPPORTS1(nsSOCKSSocketInfo, nsISOCKSSocketInfo) NS_IMETHODIMP nsSOCKSSocketInfo::GetExternalProxyAddr(PRNetAddr * *aExternalProxyAddr) { memcpy(*aExternalProxyAddr, &mExternalProxyAddr, sizeof(PRNetAddr)); return NS_OK; } NS_IMETHODIMP nsSOCKSSocketInfo::SetExternalProxyAddr(PRNetAddr *aExternalProxyAddr) { memcpy(&mExternalProxyAddr, aExternalProxyAddr, sizeof(PRNetAddr)); return NS_OK; } NS_IMETHODIMP nsSOCKSSocketInfo::GetDestinationAddr(PRNetAddr * *aDestinationAddr) { memcpy(*aDestinationAddr, &mDestinationAddr, sizeof(PRNetAddr)); return NS_OK; } NS_IMETHODIMP nsSOCKSSocketInfo::SetDestinationAddr(PRNetAddr *aDestinationAddr) { memcpy(&mDestinationAddr, aDestinationAddr, sizeof(PRNetAddr)); return NS_OK; } NS_IMETHODIMP nsSOCKSSocketInfo::GetInternalProxyAddr(PRNetAddr * *aInternalProxyAddr) { memcpy(*aInternalProxyAddr, &mInternalProxyAddr, sizeof(PRNetAddr)); return NS_OK; } NS_IMETHODIMP nsSOCKSSocketInfo::SetInternalProxyAddr(PRNetAddr *aInternalProxyAddr) { memcpy(&mInternalProxyAddr, aInternalProxyAddr, sizeof(PRNetAddr)); return NS_OK; } // Negotiate a SOCKS 5 connection. Assumes the TCP connection to the socks // server port has been established. static nsresult ConnectSOCKS5(PRFileDesc *fd, const PRNetAddr *addr, PRNetAddr *extAddr, PRIntervalTime timeout) { NS_ENSURE_TRUE(fd, NS_ERROR_NOT_INITIALIZED); NS_ENSURE_TRUE(addr, NS_ERROR_NOT_INITIALIZED); NS_ENSURE_TRUE(extAddr, NS_ERROR_NOT_INITIALIZED); unsigned char request[22]; int request_len = 0; unsigned char response[22]; int response_len = 0; request[0] = 0x05; // SOCKS version 5 request[1] = 0x01; // number of auth procotols we recognize // auth protocols request[2] = 0x00; // no authentication required // compliant implementations MUST implement GSSAPI // and SHOULD implement username/password and MAY // implement CHAP // TODO: we don't implement these //request[3] = 0x01; // GSSAPI //request[4] = 0x02; // username/password //request[5] = 0x03; // CHAP request_len = 2 + request[1]; int write_len = PR_Send(fd, request, request_len, 0, timeout); if (write_len != request_len) { LOGERROR(("PR_Send() failed. Wrote: %d bytes; Expected: %d.", write_len, request_len)); return NS_ERROR_FAILURE; } // get the server's response. Use PR_Recv() instead of response_len = 2; response_len = PR_Recv(fd, response, response_len, 0, timeout); if (response_len <= 0) { LOGERROR(("PR_Recv() failed. response_len = %d.", response_len)); return NS_ERROR_FAILURE; } if (response[0] != 0x05) { // it's a either not SOCKS or not our version LOGERROR(("Not a SOCKS 5 reply. Expected: 5; received: %x", response[0])); return NS_ERROR_FAILURE; } switch (response[1]) { case 0x00: // no auth break; case 0x01: // GSSAPI // TODO: implement LOGERROR(("Server want to use GSSAPI to authenticate, but we don't support it.")); return NS_ERROR_FAILURE; case 0x02: // username/password // TODO: implement LOGERROR(("Server want to use username/password to authenticate, but we don't support it.")); return NS_ERROR_FAILURE; case 0x03: // CHAP // TODO: implement? LOGERROR(("Server want to use CHAP to authenticate, but we don't support it.")); return NS_ERROR_FAILURE; default: // unrecognized auth method LOGERROR(("Uncrecognized authentication method received: %x", response[1])); return NS_ERROR_FAILURE; } // we are now authenticated, so lets tell // the server where to connect to request_len = 0; request[0] = 0x05; // SOCKS version 5 request[1] = 0x01; // CONNECT command request[2] = 0x00; // obligatory reserved field (perfect for MS tampering!) // get destination port PRInt32 destPort = PR_ntohs(PR_NetAddrInetPort(addr)); nsSOCKSSocketInfo * info = (nsSOCKSSocketInfo*) fd->secret; if (info->Flags() & nsISocketProvider::PROXY_RESOLVES_HOST) { LOGDEBUG(("using server to resolve hostnames rather than resolving it first\n")); // if the PROXY_RESOLVES_HOST flag is set, we assume // that the transport wants us to pass the SOCKS server the // hostname and port and let it do the name resolution. // the real destination hostname and port was stored // in our info object earlier when this layer was created. const nsCString& destHost = info->DestinationHost(); LOGDEBUG(("host:port -> %s:%li", destHost.get(), destPort)); request[3] = 0x03; // encoding of destination address (3 == hostname) int host_len = destHost.Length(); if (host_len > 255) { // SOCKS5 transmits the length of the hostname in a single char. // This gives us an absolute limit of 255 chars in a hostname, and // there's nothing we can do to extend it. I don't think many // hostnames will ever be bigger than this, so hopefully it's an // uneventful abort condition. LOGERROR (("Hostname too big for SOCKS5.")); return NS_ERROR_INVALID_ARG; } request[4] = (char) host_len; request_len = 5; // Send the initial header first... write_len = PR_Send(fd, request, request_len, 0, timeout); if (write_len != request_len) { // bad write LOGERROR(("PR_Send() failed sending connect command. Wrote: %d bytes; Expected: %d.", write_len, request_len)); return NS_ERROR_FAILURE; } // Now send the hostname... write_len = PR_Send(fd, destHost.get(), host_len, 0, timeout); if (write_len != host_len) { // bad write LOGERROR(("PR_Send() failed sending connect command. Wrote: %d bytes; Expected: %d.", write_len, host_len)); return NS_ERROR_FAILURE; } // There's no data left because we just sent it. request_len = 0; } else if (PR_NetAddrFamily(addr) == PR_AF_INET) { request[3] = 0x01; // encoding of destination address (1 == IPv4) request_len = 8; // 4 for address, 4 SOCKS headers char * ip = (char*)(&addr->inet.ip); request[4] = *ip++; request[5] = *ip++; request[6] = *ip++; request[7] = *ip++; } else if (PR_NetAddrFamily(addr) == PR_AF_INET6) { request[3] = 0x04; // encoding of destination address (4 == IPv6) request_len = 20; // 16 for address, 4 SOCKS headers char * ip = (char*)(&addr->ipv6.ip.pr_s6_addr); request[4] = *ip++; request[5] = *ip++; request[6] = *ip++; request[7] = *ip++; request[8] = *ip++; request[9] = *ip++; request[10] = *ip++; request[11] = *ip++; request[12] = *ip++; request[13] = *ip++; request[14] = *ip++; request[15] = *ip++; request[16] = *ip++; request[17] = *ip++; request[18] = *ip++; request[19] = *ip++; // we're going to test to see if this address can // be mapped back into IPv4 without loss. if so, // we'll use IPv4 instead, as reliable SOCKS server // support for IPv6 is probably questionable. if (PR_IsNetAddrType(addr, PR_IpAddrV4Mapped)) { request[3] = 0x01; // ipv4 encoding request[4] = request[16]; request[5] = request[17]; request[6] = request[18]; request[7] = request[19]; request_len -= 12; } } else { // Unknown address type LOGERROR(("Don't know what kind of IP address this is.")); return NS_ERROR_FAILURE; } // add the destination port to the request request[request_len] = (unsigned char)(destPort >> 8); request[request_len+1] = (unsigned char)destPort; request_len += 2; write_len = PR_Send(fd, request, request_len, 0, timeout); if (write_len != request_len) { // bad write LOGERROR(("PR_Send() failed sending connect command. Wrote: %d bytes; Expected: %d.", write_len, request_len)); return NS_ERROR_FAILURE; } response_len = 22; response_len = PR_Recv(fd, response, response_len, 0, timeout); if (response_len <= 0) { // bad read LOGERROR(("PR_Recv() failed getting connect command reply. response_len = %d.", response_len)); return NS_ERROR_FAILURE; } if (response[0] != 0x05) { // bad response LOGERROR(("Not a SOCKS 5 reply. Expected: 5; received: %x", response[0])); return NS_ERROR_FAILURE; } switch(response[1]) { case 0x00: break; // success case 0x01: LOGERROR(("SOCKS 5 server rejected connect request: 01, General SOCKS server failure.")); return NS_ERROR_FAILURE; case 0x02: LOGERROR(("SOCKS 5 server rejected connect request: 02, Connection not allowed by ruleset.")); return NS_ERROR_FAILURE; case 0x03: LOGERROR(("SOCKS 5 server rejected connect request: 03, Network unreachable.")); return NS_ERROR_FAILURE; case 0x04: LOGERROR(("SOCKS 5 server rejected connect request: 04, Host unreachable.")); return NS_ERROR_FAILURE; case 0x05: LOGERROR(("SOCKS 5 server rejected connect request: 05, Connection refused.")); return NS_ERROR_FAILURE; case 0x06: LOGERROR(("SOCKS 5 server rejected connect request: 06, TTL expired.")); return NS_ERROR_FAILURE; case 0x07: LOGERROR(("SOCKS 5 server rejected connect request: 07, Command not supported.")); return NS_ERROR_FAILURE; case 0x08: LOGERROR(("SOCKS 5 server rejected connect request: 08, Address type not supported.")); return NS_ERROR_FAILURE; default: LOGERROR(("SOCKS 5 server rejected connect request: %x.", response[1])); return NS_ERROR_FAILURE; } // get external bound address (this is what // the outside world sees as "us") char *ip = nsnull; PRUint16 extPort = 0; switch (response[3]) { case 0x01: // IPv4 extPort = (response[8] << 8) | response[9]; PR_SetNetAddr(PR_IpAddrAny, PR_AF_INET, extPort, extAddr); ip = (char*)(&extAddr->inet.ip); *ip++ = response[4]; *ip++ = response[5]; *ip++ = response[6]; *ip++ = response[7]; break; case 0x04: // IPv6 extPort = (response[20] << 8) | response[21]; PR_SetNetAddr(PR_IpAddrAny, PR_AF_INET6, extPort, extAddr); ip = (char*)(&extAddr->ipv6.ip.pr_s6_addr); *ip++ = response[4]; *ip++ = response[5]; *ip++ = response[6]; *ip++ = response[7]; *ip++ = response[8]; *ip++ = response[9]; *ip++ = response[10]; *ip++ = response[11]; *ip++ = response[12]; *ip++ = response[13]; *ip++ = response[14]; *ip++ = response[15]; *ip++ = response[16]; *ip++ = response[17]; *ip++ = response[18]; *ip++ = response[19]; break; case 0x03: // FQDN (should not get this back) default: // unknown format // if we get here, we don't know our external address. // however, as that's possibly not critical to the user, // we let it slide. PR_InitializeNetAddr(PR_IpAddrNull, 0, extAddr); //return NS_ERROR_FAILURE; break; } return NS_OK; } // Negotiate a SOCKS 4 connection. Assumes the TCP connection to the socks // server port has been established. static nsresult ConnectSOCKS4(PRFileDesc *fd, const PRNetAddr *addr, PRIntervalTime timeout) { NS_ENSURE_TRUE(fd, NS_ERROR_NOT_INITIALIZED); NS_ENSURE_TRUE(addr, NS_ERROR_NOT_INITIALIZED); unsigned char request[12]; int request_len = 0; int write_len; unsigned char response[10]; int response_len = 0; char *ip = nsnull; request[0] = 0x04; // SOCKS version 4 request[1] = 0x01; // CD command code -- 1 for connect // destination port PRInt32 destPort = PR_ntohs(PR_NetAddrInetPort(addr)); // store the port request[2] = (unsigned char)(destPort >> 8); request[3] = (unsigned char)destPort; // username request[8] = 'M'; request[9] = 'O'; request[10] = 'Z'; request[11] = 0x00; request_len = 12; nsSOCKSSocketInfo * info = (nsSOCKSSocketInfo*) fd->secret; if (info->Flags() & nsISocketProvider::PROXY_RESOLVES_HOST) { LOGDEBUG(("using server to resolve hostnames rather than resolving it first\n")); // if the PROXY_RESOLVES_HOST flag is set, we assume that the // transport wants us to pass the SOCKS server the hostname // and port and let it do the name resolution. // an extension to SOCKS 4, called 4a, specifies a way // to do this, so we'll try that and hope the // server supports it. // the real destination hostname and port was stored // in our info object earlier when this layer was created. const nsCString& destHost = info->DestinationHost(); LOGDEBUG(("host:port -> %s:%li\n", destHost.get(), destPort)); // the IP portion of the query is set to this special address. request[4] = 0; request[5] = 0; request[6] = 0; request[7] = 1; write_len = PR_Send(fd, request, request_len, 0, timeout); if (write_len != request_len) { LOGERROR(("PR_Send() failed. Wrote: %d bytes; Expected: %d.", write_len, request_len)); return NS_ERROR_FAILURE; } // Remember the NULL. int host_len = destHost.Length() + 1; write_len = PR_Send(fd, destHost.get(), host_len, 0, timeout); if (write_len != host_len) { LOGERROR(("PR_Send() failed. Wrote: %d bytes; Expected: %d.", write_len, host_len)); return NS_ERROR_FAILURE; } // No data to send, just sent it. request_len = 0; } else if (PR_NetAddrFamily(addr) == PR_AF_INET) { // IPv4 // store the ip ip = (char*)(&addr->inet.ip); request[4] = *ip++; request[5] = *ip++; request[6] = *ip++; request[7] = *ip++; } else if (PR_NetAddrFamily(addr) == PR_AF_INET6) { // IPv6 // IPv4 address encoded in an IPv6 address if (PR_IsNetAddrType(addr, PR_IpAddrV4Mapped)) { // store the ip ip = (char*)(&addr->ipv6.ip.pr_s6_addr[12]); request[4] = *ip++; request[5] = *ip++; request[6] = *ip++; request[7] = *ip++; } else { LOGERROR(("IPv6 is not supported in SOCKS 4.")); return NS_ERROR_FAILURE; // SOCKS 4 can't do IPv6 } } else { LOGERROR(("Don't know what kind of IP address this is.")); return NS_ERROR_FAILURE; // don't recognize this type } if (request_len > 0) { write_len = PR_Send(fd, request, request_len, 0, timeout); if (write_len != request_len) { LOGERROR(("PR_Send() failed. Wrote: %d bytes; Expected: %d.", write_len, request_len)); return NS_ERROR_FAILURE; } } // get the server's response response_len = 8; // size of the response response_len = PR_Recv(fd, response, response_len, 0, timeout); if (response_len <= 0) { LOGERROR(("PR_Recv() failed. response_len = %d.", response_len)); return NS_ERROR_FAILURE; } if ((response[0] != 0x00) && (response[0] != 0x04)) { // Novell BorderManager sends a response of type 4, should be zero // According to the spec. Cope with this brokenness. // it's not a SOCKS 4 reply or version 0 of the reply code LOGERROR(("Not a SOCKS 4 reply. Expected: 0; received: %x.", response[0])); return NS_ERROR_FAILURE; } if (response[1] != 0x5A) { // = 90: request granted // connect request not granted LOGERROR(("Connection request refused. Expected: 90; received: %d.", response[1])); return NS_ERROR_FAILURE; } return NS_OK; } static PRStatus PR_CALLBACK nsSOCKSIOLayerConnect(PRFileDesc *fd, const PRNetAddr *addr, PRIntervalTime /*timeout*/) { PRStatus status; nsSOCKSSocketInfo * info = (nsSOCKSSocketInfo*) fd->secret; if (info == NULL) return PR_FAILURE; // First, we need to look up our proxy... const nsCString &proxyHost = info->ProxyHost(); if (proxyHost.IsEmpty()) return PR_FAILURE; PRInt32 socksVersion = info->Version(); LOGDEBUG(("nsSOCKSIOLayerConnect SOCKS %u; proxyHost: %s.", socksVersion, proxyHost.get())); // Sync resolve the proxy hostname. PRNetAddr proxyAddr; nsCOMPtr rec; nsresult rv; { nsCOMPtr dns; dns = do_GetService(NS_DNSSERVICE_CONTRACTID, &rv); if (NS_FAILED(rv)) return PR_FAILURE; rv = dns->Resolve(proxyHost, 0, getter_AddRefs(rec)); if (NS_FAILED(rv)) return PR_FAILURE; } info->SetInternalProxyAddr(&proxyAddr); // For now, we'll do this as a blocking connect, // but with nspr 4.1, the necessary functions to // do a non-blocking connect will be available // Preserve the non-blocking state of the socket PRBool nonblocking; PRSocketOptionData sockopt; sockopt.option = PR_SockOpt_Nonblocking; status = PR_GetSocketOption(fd, &sockopt); if (PR_SUCCESS != status) { LOGERROR(("PR_GetSocketOption() failed. status = %x.", status)); return status; } // Store blocking option nonblocking = sockopt.value.non_blocking; sockopt.option = PR_SockOpt_Nonblocking; sockopt.value.non_blocking = PR_FALSE; status = PR_SetSocketOption(fd, &sockopt); if (PR_SUCCESS != status) { LOGERROR(("PR_SetSocketOption() failed. status = %x.", status)); return status; } // Now setup sockopts, so we can restore the value later. sockopt.option = PR_SockOpt_Nonblocking; sockopt.value.non_blocking = nonblocking; // This connectWait should be long enough to connect to local proxy // servers, but not much longer. Since this protocol negotiation // uses blocking network calls, the app can appear to hang for a maximum // of this time if the user presses the STOP button during the SOCKS // connection negotiation. Note that this value only applies to the // connecting to the SOCKS server: once the SOCKS connection has been // established, the value is not used anywhere else. PRIntervalTime connectWait = PR_SecondsToInterval(10); // Connect to the proxy server. PRInt32 addresses = 0; do { rv = rec->GetNextAddr(info->ProxyPort(), &proxyAddr); if (NS_FAILED(rv)) { status = PR_FAILURE; break; } ++addresses; status = fd->lower->methods->connect(fd->lower, &proxyAddr, connectWait); } while (PR_SUCCESS != status); if (PR_SUCCESS != status) { LOGERROR(("Failed to TCP connect to the proxy server (%s): timeout = %d, status = %x, tried %d addresses.", proxyHost.get(), connectWait, status, addresses)); PR_SetSocketOption(fd, &sockopt); return status; } // We are now connected to the SOCKS proxy server. // Now we will negotiate a connection to the desired server. // External IP address returned from ConnectSOCKS5(). Not supported in SOCKS4. PRNetAddr extAddr; PR_InitializeNetAddr(PR_IpAddrNull, 0, &extAddr); NS_ASSERTION((socksVersion == 4) || (socksVersion == 5), "SOCKS Version must be selected"); // Try to connect via SOCKS 5. if (socksVersion == 5) { rv = ConnectSOCKS5(fd, addr, &extAddr, connectWait); if (NS_FAILED(rv)) { PR_SetSocketOption(fd, &sockopt); return PR_FAILURE; } } // Try to connect via SOCKS 4. else { rv = ConnectSOCKS4(fd, addr, connectWait); if (NS_FAILED(rv)) { PR_SetSocketOption(fd, &sockopt); return PR_FAILURE; } } info->SetDestinationAddr((PRNetAddr*)addr); info->SetExternalProxyAddr(&extAddr); // restore non-blocking option PR_SetSocketOption(fd, &sockopt); // we're set-up and connected. // this socket can be used as normal now. return PR_SUCCESS; } static PRStatus PR_CALLBACK nsSOCKSIOLayerClose(PRFileDesc *fd) { nsSOCKSSocketInfo * info = (nsSOCKSSocketInfo*) fd->secret; PRDescIdentity id = PR_GetLayersIdentity(fd); if (info && id == nsSOCKSIOLayerIdentity) { NS_RELEASE(info); fd->identity = PR_INVALID_IO_LAYER; } return fd->lower->methods->close(fd->lower); } static PRFileDesc* PR_CALLBACK nsSOCKSIOLayerAccept(PRFileDesc *fd, PRNetAddr *addr, PRIntervalTime timeout) { // TODO: implement SOCKS support for accept return fd->lower->methods->accept(fd->lower, addr, timeout); } static PRInt32 PR_CALLBACK nsSOCKSIOLayerAcceptRead(PRFileDesc *sd, PRFileDesc **nd, PRNetAddr **raddr, void *buf, PRInt32 amount, PRIntervalTime timeout) { // TODO: implement SOCKS support for accept, then read from it return sd->lower->methods->acceptread(sd->lower, nd, raddr, buf, amount, timeout); } static PRStatus PR_CALLBACK nsSOCKSIOLayerBind(PRFileDesc *fd, const PRNetAddr *addr) { // TODO: implement SOCKS support for bind (very similar to connect) return fd->lower->methods->bind(fd->lower, addr); } static PRStatus PR_CALLBACK nsSOCKSIOLayerGetName(PRFileDesc *fd, PRNetAddr *addr) { nsSOCKSSocketInfo * info = (nsSOCKSSocketInfo*) fd->secret; if (info != NULL && addr != NULL) { if (info->GetExternalProxyAddr(&addr) == NS_OK) return PR_SUCCESS; } return PR_FAILURE; } static PRStatus PR_CALLBACK nsSOCKSIOLayerGetPeerName(PRFileDesc *fd, PRNetAddr *addr) { nsSOCKSSocketInfo * info = (nsSOCKSSocketInfo*) fd->secret; if (info != NULL && addr != NULL) { if (info->GetDestinationAddr(&addr) == NS_OK) return PR_SUCCESS; } return PR_FAILURE; } static PRStatus PR_CALLBACK nsSOCKSIOLayerListen(PRFileDesc *fd, PRIntn backlog) { // TODO: implement SOCKS support for listen return fd->lower->methods->listen(fd->lower, backlog); } // add SOCKS IO layer to an existing socket nsresult nsSOCKSIOLayerAddToSocket(PRInt32 family, const char *host, PRInt32 port, const char *proxyHost, PRInt32 proxyPort, PRInt32 socksVersion, PRUint32 flags, PRFileDesc *fd, nsISupports** info) { NS_ENSURE_TRUE((socksVersion == 4) || (socksVersion == 5), NS_ERROR_NOT_INITIALIZED); if (firstTime) { nsSOCKSIOLayerIdentity = PR_GetUniqueIdentity("SOCKS layer"); nsSOCKSIOLayerMethods = *PR_GetDefaultIOMethods(); nsSOCKSIOLayerMethods.connect = nsSOCKSIOLayerConnect; nsSOCKSIOLayerMethods.bind = nsSOCKSIOLayerBind; nsSOCKSIOLayerMethods.acceptread = nsSOCKSIOLayerAcceptRead; nsSOCKSIOLayerMethods.getsockname = nsSOCKSIOLayerGetName; nsSOCKSIOLayerMethods.getpeername = nsSOCKSIOLayerGetPeerName; nsSOCKSIOLayerMethods.accept = nsSOCKSIOLayerAccept; nsSOCKSIOLayerMethods.listen = nsSOCKSIOLayerListen; nsSOCKSIOLayerMethods.close = nsSOCKSIOLayerClose; firstTime = PR_FALSE; #if defined(PR_LOGGING) gSOCKSLog = PR_NewLogModule("SOCKS"); #endif } LOGDEBUG(("Entering nsSOCKSIOLayerAddToSocket().")); PRFileDesc * layer; PRStatus rv; layer = PR_CreateIOLayerStub(nsSOCKSIOLayerIdentity, &nsSOCKSIOLayerMethods); if (! layer) { LOGERROR(("PR_CreateIOLayerStub() failed.")); return NS_ERROR_FAILURE; } nsSOCKSSocketInfo * infoObject = new nsSOCKSSocketInfo(); if (!infoObject) { // clean up IOLayerStub LOGERROR(("Failed to create nsSOCKSSocketInfo().")); PR_DELETE(layer); return NS_ERROR_FAILURE; } NS_ADDREF(infoObject); infoObject->Init(socksVersion, proxyHost, proxyPort, host, flags); layer->secret = (PRFilePrivate*) infoObject; rv = PR_PushIOLayer(fd, PR_GetLayersIdentity(fd), layer); if (NS_FAILED(rv)) { LOGERROR(("PR_PushIOLayer() failed. rv = %x.", rv)); NS_RELEASE(infoObject); PR_DELETE(layer); return NS_ERROR_FAILURE; } *info = infoObject; NS_ADDREF(*info); return NS_OK; }