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/*
Miranda NG: the free IM client for Microsoft* Windows*
Copyright (c) 2012-14 Miranda NG project (http://miranda-ng.org),
Copyright (c) 2000-12 Miranda IM project,
all portions of this codebase are copyrighted to the people
listed in contributors.txt.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "..\..\core\commonheaders.h"
#include "netlib.h"
bool BindSocketToPort(const char *szPorts, SOCKET s, SOCKET s6, int* portn)
{
SOCKADDR_IN sin = {0};
sin.sin_family = AF_INET;
SOCKADDR_IN6 sin6 = {0};
sin6.sin6_family = AF_INET6;
mir_cslock lck(csNetlibUser);
if (--*portn < 0 && (s != INVALID_SOCKET || s6 != INVALID_SOCKET)) {
BindSocketToPort(szPorts, INVALID_SOCKET, INVALID_SOCKET, portn);
if (*portn == 0)
return false;
WORD num;
CallService(MS_UTILS_GETRANDOM, sizeof(WORD), (LPARAM)&num);
*portn = num % *portn;
}
bool before = false;
while (true) {
const char *psz;
char *pszEnd;
int portMin, portMax, port, portnum = 0;
for (psz = szPorts;*psz;) {
while (*psz == ' ' || *psz == ',') psz++;
portMin = strtol(psz, &pszEnd, 0);
if (pszEnd == psz)
break;
while (*pszEnd == ' ')
pszEnd++;
if (*pszEnd == '-') {
psz = pszEnd + 1;
portMax = strtol(psz, &pszEnd, 0);
if (pszEnd == psz) portMax = 65535;
if (portMin > portMax) {
port = portMin;
portMin = portMax;
portMax = port;
}
}
else portMax = portMin;
if (portMax >= 1) {
if (portMin <= 0) portMin = 1;
for (port = portMin; port <= portMax; port++) {
if (port > 65535)
break;
++portnum;
if (s == INVALID_SOCKET) continue;
if (!before && portnum <= *portn) continue;
if (before && portnum >= *portn)
return false;
sin.sin_port = htons((WORD)port);
bool bV4Mapped = s == INVALID_SOCKET || bind(s, (SOCKADDR*)&sin, sizeof(sin)) == 0;
sin6.sin6_port = htons((WORD)port);
bool bV6Mapped = s6 == INVALID_SOCKET || bind(s6, (PSOCKADDR)&sin6, sizeof(sin6)) == 0;
if (bV4Mapped && bV6Mapped) {
*portn = portnum + 1;
return true;
}
}
}
psz = pszEnd;
}
if (*portn < 0) {
*portn = portnum;
return true;
}
if (*portn >= portnum)
*portn = 0;
else
before = true;
}
}
int NetlibFreeBoundPort(struct NetlibBoundPort *nlbp)
{
closesocket(nlbp->s);
closesocket(nlbp->s6);
if (nlbp->hThread)
WaitForSingleObject(nlbp->hThread, INFINITE);
NetlibLogf(nlbp->nlu, "(%u) Port %u closed for incoming connections", nlbp->s, nlbp->wPort);
mir_free(nlbp);
return 1;
}
static void NetlibBindAcceptThread(void* param)
{
NetlibBoundPort *nlbp = (NetlibBoundPort*)param;
NetlibLogf(nlbp->nlu, "(%u) Port %u opened for incoming connections", nlbp->s, nlbp->wPort);
while (true) {
fd_set r;
FD_ZERO(&r);
if (nlbp->s != INVALID_SOCKET)
FD_SET(nlbp->s, &r);
if (nlbp->s6 != INVALID_SOCKET)
FD_SET(nlbp->s6, &r);
if (select(0, &r, NULL, NULL, NULL) == SOCKET_ERROR) {
NetlibLogf(nlbp->nlu, "NetlibBindAcceptThread (%p): select failed (%d)", nlbp->s, GetLastError());
break;
}
SOCKADDR_INET_M sin;
int sinLen = sizeof(sin);
memset(&sin, 0, sizeof(sin));
SOCKET s;
if (FD_ISSET(nlbp->s, &r)) {
s = accept(nlbp->s, (sockaddr*)&sin, &sinLen);
if (s == INVALID_SOCKET) {
NetlibLogf(nlbp->nlu, "NetlibBindAcceptThread (%p): accept V4 failed (%d)", nlbp->s, GetLastError());
break;
}
}
else if (FD_ISSET(nlbp->s6, &r)) {
s = accept(nlbp->s6, (sockaddr*)&sin, &sinLen);
if (s == INVALID_SOCKET) {
NetlibLogf(nlbp->nlu, "NetlibBindAcceptThread (%p): accept V6 failed (%d)", nlbp->s, GetLastError());
break;
}
}
NetlibLogf(nlbp->nlu, "New incoming connection on port %u from %s (%p)", nlbp->wPort, ptrA(NetlibAddressToString(&sin)), s);
NetlibConnection *nlc = (NetlibConnection*)mir_calloc(sizeof(NetlibConnection));
nlc->handleType = NLH_CONNECTION;
nlc->nlu = nlbp->nlu;
nlc->s = s;
nlc->s2 = INVALID_SOCKET;
InitializeCriticalSection(&nlc->csHttpSequenceNums);
nlc->hOkToCloseEvent = CreateEvent(NULL, TRUE, TRUE, NULL);
NetlibInitializeNestedCS(&nlc->ncsSend);
NetlibInitializeNestedCS(&nlc->ncsRecv);
if (nlbp->pfnNewConnectionV2)
nlbp->pfnNewConnectionV2(nlc, ntohl(sin.Ipv4.sin_addr.S_un.S_addr), nlbp->pExtra);
}
NetlibUPnPDeletePortMapping(nlbp->wExPort, "TCP");
nlbp->hThread = 0;
NetlibLogf(nlbp->nlu, "NetlibBindAcceptThread: (%p) thread for port %u closed", nlbp->s, nlbp->wPort);
}
INT_PTR NetlibBindPort(WPARAM wParam, LPARAM lParam)
{
NETLIBBIND *nlb = (NETLIBBIND*)lParam;
NetlibUser *nlu = (NetlibUser*)wParam;
struct NetlibBoundPort *nlbp;
SOCKADDR_IN sin = { 0 };
SOCKADDR_IN6 sin6 = { 0 };
int foundPort = 0;
if (GetNetlibHandleType(nlu) != NLH_USER || !(nlu->user.flags & NUF_INCOMING) ||
nlb == NULL || nlb->pfnNewConnection == NULL) {
SetLastError(ERROR_INVALID_PARAMETER);
return 0;
}
if (nlb->cbSize != sizeof(NETLIBBIND))
return 0;
nlbp = (NetlibBoundPort*)mir_calloc(sizeof(NetlibBoundPort));
nlbp->handleType = NLH_BOUNDPORT;
nlbp->nlu = nlu;
nlbp->pfnNewConnectionV2 = nlb->pfnNewConnectionV2;
nlbp->s = socket(PF_INET, SOCK_STREAM, 0);
nlbp->s6 = socket(PF_INET6, SOCK_STREAM, 0);
nlbp->pExtra = nlb->pExtra;
if (nlbp->s == INVALID_SOCKET && nlbp->s6 == INVALID_SOCKET) {
NetlibLogf(nlu, "%s %d: %s() failed (%u)", __FILE__, __LINE__, "socket", WSAGetLastError());
mir_free(nlbp);
return 0;
}
sin.sin_family = AF_INET;
sin6.sin6_family = AF_INET6;
/* if the netlib user wanted a free port given in the range, then
they better have given wPort == 0, let's hope so */
if (nlu->settings.specifyIncomingPorts && nlu->settings.szIncomingPorts && nlb->wPort == 0) {
if (!BindSocketToPort(nlu->settings.szIncomingPorts, nlbp->s, nlbp->s6, &nlu->outportnum)) {
NetlibLogf(nlu, "Netlib bind: Not enough ports for incoming connections specified");
SetLastError(WSAEADDRINUSE);
}
else foundPort = 1;
}
else {
/* if ->wPort == 0 then they'll get any free port, otherwise they'll
be asking for whatever was in nlb->wPort*/
if (nlb->wPort != 0) {
NetlibLogf(nlu, "%s %d: trying to bind port %d, this 'feature' can be abused, please be sure you want to allow it.", __FILE__, __LINE__, nlb->wPort);
sin.sin_port = htons(nlb->wPort);
sin6.sin6_port = htons(nlb->wPort);
}
if (bind(nlbp->s, (PSOCKADDR)&sin, sizeof(sin)) == 0) {
SOCKADDR_IN sin = { 0 };
int len = sizeof(sin);
if (!getsockname(nlbp->s, (PSOCKADDR)&sin, &len))
sin6.sin6_port = sin.sin_port;
foundPort = 1;
}
if (bind(nlbp->s6, (PSOCKADDR)&sin6, sizeof(sin6)) == 0)
foundPort = 1;
}
if (!foundPort) {
NetlibLogf(nlu, "%s %d: %s() failed (%u)", __FILE__, __LINE__, "bind", WSAGetLastError());
closesocket(nlbp->s);
closesocket(nlbp->s6);
mir_free(nlbp);
return 0;
}
if (nlbp->s != INVALID_SOCKET && listen(nlbp->s, 5)) {
NetlibLogf(nlu, "%s %d: %s() failed (%u)", __FILE__, __LINE__, "listen", WSAGetLastError());
closesocket(nlbp->s);
closesocket(nlbp->s6);
mir_free(nlbp);
return 0;
}
if (nlbp->s6 != INVALID_SOCKET && listen(nlbp->s6, 5)) {
NetlibLogf(nlu, "%s %d: %s() failed (%u)", __FILE__, __LINE__, "listen", WSAGetLastError());
closesocket(nlbp->s);
closesocket(nlbp->s6);
mir_free(nlbp);
return 0;
}
SOCKADDR_INET_M sinm = { 0 };
int len = sizeof(sinm);
if (!getsockname(nlbp->s, (PSOCKADDR)&sinm, &len)) {
nlb->wPort = ntohs(sinm.Ipv4.sin_port);
nlb->dwInternalIP = ntohl(sinm.Ipv4.sin_addr.S_un.S_addr);
}
else if (!getsockname(nlbp->s6, (PSOCKADDR)&sinm, &len))
nlb->wPort = ntohs(sinm.Ipv6.sin6_port);
else {
NetlibLogf(nlu, "%s %d: %s() failed (%u)", __FILE__, __LINE__, "getsockname", WSAGetLastError());
closesocket(nlbp->s);
closesocket(nlbp->s6);
mir_free(nlbp);
return 0;
}
nlbp->wPort = nlb->wPort;
if (nlb->dwInternalIP == 0) {
char hostname[64] = "";
gethostname(hostname, SIZEOF(hostname));
PHOSTENT he = gethostbyname(hostname);
if (he && he->h_addr)
nlb->dwInternalIP = ntohl(*(PDWORD)he->h_addr);
}
DWORD extIP;
if (nlu->settings.enableUPnP && NetlibUPnPAddPortMapping(nlb->wPort, "TCP", &nlbp->wExPort, &extIP, true)) {
NetlibLogf(NULL, "UPnP port mapping succeeded. Internal Port: %u External Port: %u\n", nlb->wPort, nlbp->wExPort);
nlb->wExPort = nlbp->wExPort;
nlb->dwExternalIP = extIP;
}
else {
if (nlu->settings.enableUPnP)
NetlibLogf(NULL, "UPnP port mapping failed. Internal Port: %u\n", nlb->wPort);
else
NetlibLogf(NULL, "UPnP disabled. Internal Port: %u\n", nlb->wPort);
nlbp->wExPort = 0;
nlb->wExPort = nlb->wPort;
nlb->dwExternalIP = nlb->dwInternalIP;
}
nlbp->hThread = mir_forkthread(NetlibBindAcceptThread, nlbp);
return (INT_PTR)nlbp;
}
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