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linbpq/NNTPRoutines.c

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/*
Copyright 2001-2018 John Wiseman G8BPQ
This file is part of LinBPQ/BPQ32.
LinBPQ/BPQ32 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 3 of the License, or
(at your option) any later version.
LinBPQ/BPQ32 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 LinBPQ/BPQ32. If not, see http://www.gnu.org/licenses
*/
// Mail and Chat Server for BPQ32 Packet Switch
//
// White Pages Database Support Routines
#include "bpqmail.h"
VOID __cdecl Debugprintf(const char * format, ...);
VOID ReleaseSock(SOCKET sock);
struct NNTPRec * FirstNNTPRec = NULL;
//int NumberofNNTPRecs=0;
SOCKET nntpsock;
extern SocketConn * Sockets; // Chain of active sockets
int NNTPInPort = 0;
char *day[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
VOID ReleaseNNTPSock(SOCKET sock);
struct NNTPRec * LookupNNTP(char * Group)
{
struct NNTPRec * ptr = FirstNNTPRec;
while (ptr)
{
if (_stricmp(ptr->NewsGroup, Group) == 0)
return ptr;
ptr = ptr->Next;
}
return NULL;
}
VOID BuildNNTPList(struct MsgInfo * Msg)
{
struct NNTPRec * REC;
struct NNTPRec * OLDREC;
struct NNTPRec * PREVREC = 0;
char FullGroup[100];
if (Msg->type != 'B' || Msg->status == 'K' || Msg->status == 'H')
return;
sprintf(FullGroup, "%s.%s", Msg->to, Msg->via);
REC = LookupNNTP(FullGroup);
if (REC == NULL)
{
// New Group. Allocate a record, and put at correct place in chain (alpha order)
GetSemaphore(&AllocSemaphore, 0);
REC = zalloc(sizeof (struct NNTPRec));
OLDREC = FirstNNTPRec;
if (OLDREC == 0) // First record
{
FirstNNTPRec = REC;
goto DoneIt;
}
else
{
// Follow chain till we find one with a later name
while(OLDREC)
{
if (strcmp(OLDREC->NewsGroup, FullGroup) > 0)
{
// chain in here
REC->Next = OLDREC;
if (PREVREC)
PREVREC->Next = REC;
else
FirstNNTPRec = REC;
goto DoneIt;
}
else
{
PREVREC = OLDREC;
OLDREC = OLDREC->Next;
}
}
// Run off end - chain to PREVREC
PREVREC->Next = REC;
}
DoneIt:
strcpy(REC->NewsGroup, FullGroup);
REC->FirstMsg = Msg->number;
REC->DateCreated = (time_t)Msg->datecreated;
FreeSemaphore(&AllocSemaphore);
}
REC->LastMsg = Msg->number;
REC->Count++;
}
void RebuildNNTPList()
{
struct NNTPRec * NNTPREC = FirstNNTPRec;
struct NNTPRec * SaveNNTPREC;
struct MsgInfo * Msg;
int i;
// Free old list
while (NNTPREC)
{
SaveNNTPREC = NNTPREC->Next;
free(NNTPREC);
NNTPREC = SaveNNTPREC;
}
FirstNNTPRec = NULL;
for (i = 1; i <= NumberofMessages; i++)
{
Msg = MsgHddrPtr[i];
BuildNNTPList(Msg);
}
}
char * GetPathFromHeaders(char * MsgBytes)
{
char * Path = zalloc(10000);
char * ptr1;
ptr1 = MsgBytes;
nextline:
if (memcmp(ptr1, "R:", 2) == 0)
{
char * ptr4 = strchr(ptr1, '\r');
char * ptr5 = strchr(ptr1, '.');
ptr1 = strchr(ptr1, '@');
if (!ptr1)
return Path;
if (*++ptr1 == ':')
ptr1++; // Format 2
*(ptr5) = 0;
strcat(Path, "|");
strcat(Path, ptr1);
*(ptr5) = '.';
ptr1 = ptr4;
ptr1++;
if (*ptr1 == '\n') ptr1++;
goto nextline;
}
return Path;
}
char * FormatNNTPDateAndTime(time_t Datim)
{
struct tm *tm;
static char Date[30];
// Fri, 19 Nov 82 16:14:55 GMT
// A#asctime gives Wed Jan 02 02:03:55 1980\n\0.
tm = gmtime(&Datim);
if (tm)
sprintf_s(Date, sizeof(Date), "%s, %02d %3s %02d %02d:%02d:%02d Z",
day[tm->tm_wday], tm->tm_mday, month[tm->tm_mon], tm->tm_year - 100, tm->tm_hour, tm->tm_min, tm->tm_sec);
return Date;
}
VOID InitialiseNNTP()
{
if (NNTPInPort)
nntpsock = CreateListeningSocket(NNTPInPort);
}
int CreateNNTPMessage(char * From, char * To, char * MsgTitle, time_t Date, char * MsgBody, int MsgLen)
{
struct MsgInfo * Msg;
BIDRec * BIDRec;
char * Via;
// Allocate a message Record slot
Msg = AllocateMsgRecord();
// Set number here so they remain in sequence
Msg->number = ++LatestMsg;
MsgnotoMsg[Msg->number] = Msg;
Msg->length = MsgLen;
sprintf_s(Msg->bid, sizeof(Msg->bid), "%d_%s", LatestMsg, BBSName);
Msg->type = 'B';
Msg->status = 'N';
Msg->datereceived = Msg->datechanged = Msg->datecreated = time(NULL);
if (Date)
Msg->datecreated = Date;
BIDRec = AllocateBIDRecord();
strcpy(BIDRec->BID, Msg->bid);
BIDRec->mode = Msg->type;
BIDRec->u.msgno = LOWORD(Msg->number);
BIDRec->u.timestamp = LOWORD(time(NULL)/86400);
TidyString(To);
Via = strlop(To, '@');
if (strlen(To) > 6) To[6]=0;
strcpy(Msg->to, To);
strcpy(Msg->from, From);
strcpy(Msg->title, MsgTitle);
strcpy(Msg->via, Via);
// Set up forwarding bitmap
MatchMessagetoBBSList(Msg, 0);
if (memcmp(Msg->fbbs, zeros, NBMASK) != 0)
Msg->status = '$'; // Has forwarding
BuildNNTPList(Msg); // Build NNTP Groups list
return CreateSMTPMessageFile(MsgBody, Msg);
}
VOID ProcessNNTPServerMessage(SocketConn * sockptr, char * Buffer, int Len)
{
SOCKET sock;
time_t Date = 0;
sock=sockptr->socket;
WriteLogLine(NULL, '<',Buffer, Len-2, LOG_TCP);
if (sockptr->Flags == GETTINGMESSAGE)
{
if(memcmp(Buffer, ".\r\n", 3) == 0)
{
// File Message
char * ptr1, * ptr2;
int linelen, MsgLen;
char MsgFrom[62], MsgTo[62], Msgtitle[62];
// Scan headers for From: To: and Subject: Line (Headers end at blank line)
ptr1 = sockptr->MailBuffer;
Loop:
ptr2 = strchr(ptr1, '\r');
if (ptr2 == NULL)
{
SendSock(sockptr, "500 Eh");
return;
}
linelen = (int)(ptr2 - ptr1);
// From: "John Wiseman" <john.wiseman@ntlworld.com>
// To: <G8BPQ@g8bpq.org.uk>
//<To: <gm8bpq+g8bpq@googlemail.com>
if (_memicmp(ptr1, "From:", 5) == 0)
{
if (linelen > 65) linelen = 65;
memcpy(MsgFrom, ptr1, linelen);
MsgFrom[linelen]=0;
}
else
if (_memicmp(ptr1, "Newsgroups:", 3) == 0)
{
char * sep = strchr(ptr1, '.');
if (sep)
*(sep) = '@';
if (linelen > 63) linelen = 63;
memcpy(MsgTo, &ptr1[11], linelen-11);
MsgTo[linelen-11]=0;
}
else
if (_memicmp(ptr1, "Subject:", 8) == 0)
{
if (linelen > 68) linelen = 68;
memcpy(Msgtitle, &ptr1[9], linelen-9);
Msgtitle[linelen-9]=0;
}
else
if (_memicmp(ptr1, "Date:", 5) == 0)
{
struct tm rtime;
char * Context;
char seps[] = " ,\t\r";
char Offset[10] = "";
int i, HH, MM;
memset(&rtime, 0, sizeof(struct tm));
// Date: Tue, 9 Jun 2009 20:54:55 +0100
ptr1 = strtok_s(&ptr1[5], seps, &Context); // Skip Day
ptr1 = strtok_s(NULL, seps, &Context); // Day
rtime.tm_mday = atoi(ptr1);
ptr1 = strtok_s(NULL, seps, &Context); // Month
for (i=0; i < 12; i++)
{
if (strcmp(month[i], ptr1) == 0)
{
rtime.tm_mon = i;
break;
}
}
sscanf(Context, "%04d %02d:%02d:%02d%s",
&rtime.tm_year, &rtime.tm_hour, &rtime.tm_min, &rtime.tm_sec, Offset);
rtime.tm_year -= 1900;
Date = mktime(&rtime) - (time_t)_MYTIMEZONE;
if (Date == (time_t)-1)
Date = 0;
else
{
if ((Offset[0] == '+') || (Offset[0] == '-'))
{
MM = atoi(&Offset[3]);
Offset[3] = 0;
HH = atoi(&Offset[1]);
MM = MM + (60 * HH);
if (Offset[0] == '+')
Date -= (60*MM);
else
Date += (60*MM);
}
}
}
if (linelen) // Not Null line
{
ptr1 = ptr2 + 2; // Skip crlf
goto Loop;
}
ptr1 = sockptr->MailBuffer;
MsgLen = sockptr->MailSize - (int)(ptr2 - ptr1);
ptr1 = strchr(MsgFrom, '<');
if (ptr1)
{
char * ptr3 = strchr(ptr1, '@');
ptr1++;
if (ptr3)
*(ptr3) = 0;
}
else
ptr1 = MsgFrom;
CreateNNTPMessage(_strupr(ptr1), _strupr(MsgTo), Msgtitle, Date, ptr2, MsgLen);
free(sockptr->MailBuffer);
sockptr->MailBufferSize=0;
sockptr->MailBuffer=0;
sockptr->MailSize = 0;
sockptr->Flags &= ~GETTINGMESSAGE;
SendSock(sockptr, "240 OK");
return;
}
if ((sockptr->MailSize + Len) > sockptr->MailBufferSize)
{
sockptr->MailBufferSize += 10000;
sockptr->MailBuffer = realloc(sockptr->MailBuffer, sockptr->MailBufferSize);
if (sockptr->MailBuffer == NULL)
{
CriticalErrorHandler("Failed to extend Message Buffer");
shutdown(sock, 0);
return;
}
}
memcpy(&sockptr->MailBuffer[sockptr->MailSize], Buffer, Len);
sockptr->MailSize += Len;
return;
}
Buffer[Len-2] = 0;
if(_memicmp(Buffer, "AUTHINFO USER", 13) == 0)
{
if (Len > 22) Buffer[22]=0;
strcpy(sockptr->CallSign, &Buffer[14]);
sockptr->State = GettingPass;
sockprintf(sockptr, "381 More authentication information required");
return;
}
if (sockptr->State == GettingUser)
{
sockprintf(sockptr, "480 Authentication required");
return;
}
if (sockptr->State == GettingPass)
{
struct UserInfo * user = NULL;
if(_memicmp(Buffer, "AUTHINFO PASS", 13) == 0)
{
user = LookupCall(sockptr->CallSign);
if (user)
{
if (strcmp(user->pass, &Buffer[14]) == 0)
{
sockprintf(sockptr, "281 Authentication accepted");
sockptr->State = Authenticated;
sockptr->POP3User = user;
return;
}
}
SendSock(sockptr, "482 Authentication rejected");
sockptr->State = GettingUser;
return;
}
sockprintf(sockptr, "480 Authentication required");
return;
}
if(_memicmp(Buffer, "GROUP", 5) == 0)
{
struct NNTPRec * REC = FirstNNTPRec;
while (REC)
{
if (_stricmp(REC->NewsGroup, &Buffer[6]) == 0)
{
sockprintf(sockptr, "211 %d %d %d %s", REC->Count, REC->FirstMsg, REC->LastMsg, REC->NewsGroup);
sockptr->NNTPNum = 0;
sockptr->NNTPGroup = REC;
return;
}
REC =REC->Next;
}
sockprintf(sockptr, "411 no such news group");
return;
}
if(_memicmp(Buffer, "LISTGROUP", 9) == 0)
{
struct NNTPRec * REC = sockptr->NNTPGroup;
struct MsgInfo * Msg;
int MsgNo ;
// Either currently selected, or a param follows
if (REC == NULL && Buffer[10] == 0)
{
sockprintf(sockptr, "412 No Group Selected");
return;
}
if (Buffer[10] == 0)
goto GotGroup;
REC = FirstNNTPRec;
while(REC)
{
if (_stricmp(REC->NewsGroup, &Buffer[10]) == 0)
{
GotGroup:
sockprintf(sockptr, "211 Article Numbers Follows");
sockptr->NNTPNum = 0;
sockptr->NNTPGroup = REC;
for (MsgNo = REC->FirstMsg; MsgNo <= REC->LastMsg; MsgNo++)
{
Msg=MsgnotoMsg[MsgNo];
if (Msg)
{
char FullGroup[100];
sprintf(FullGroup, "%s.%s", Msg->to, Msg->via );
if (_stricmp(FullGroup, REC->NewsGroup) == 0)
{
sockprintf(sockptr, "%d", MsgNo);
}
}
}
SendSock(sockptr,".");
return;
}
REC = REC->Next;
}
sockprintf(sockptr, "411 no such news group");
return;
}
if(_memicmp(Buffer, "MODE READER", 11) == 0)
{
SendSock(sockptr, "200 Hello");
return;
}
if(_memicmp(Buffer, "LIST",4) == 0)
{
struct NNTPRec * REC = FirstNNTPRec;
SendSock(sockptr, "215 list of newsgroups follows");
while (REC)
{
sockprintf(sockptr, "%s %d %d y", REC->NewsGroup, REC->LastMsg, REC->FirstMsg);
REC = REC->Next;
}
SendSock(sockptr,".");
return;
}
//NEWGROUPS YYMMDD HHMMSS [GMT] [<distributions>]
if(_memicmp(Buffer, "NEWGROUPS", 9) == 0)
{
struct NNTPRec * REC = FirstNNTPRec;
struct tm rtime;
char Offset[20] = "";
time_t Time;
memset(&rtime, 0, sizeof(struct tm));
sscanf(&Buffer[10], "%02d%02d%02d %02d%02d%02d %s",
&rtime.tm_year, &rtime.tm_mon, &rtime.tm_mday,
&rtime.tm_hour, &rtime.tm_min, &rtime.tm_sec, Offset);
rtime.tm_year+=100;
rtime.tm_mon--;
if (_stricmp(Offset, "GMT") == 0)
Time = mktime(&rtime) - (time_t)_MYTIMEZONE;
else
Time = mktime(&rtime);
SendSock(sockptr, "231 list of new newsgroups follows");
while(REC)
{
if (REC->DateCreated > Time)
sockprintf(sockptr, "%s %d %d y", REC->NewsGroup, REC->LastMsg, REC->FirstMsg);
REC = REC->Next;
}
SendSock(sockptr,".");
return;
}
if(_memicmp(Buffer, "HEAD",4) == 0)
{
struct NNTPRec * REC = sockptr->NNTPGroup;
struct MsgInfo * Msg;
int MsgNo = atoi(&Buffer[5]);
if (REC == NULL)
{
SendSock(sockptr,"412 no newsgroup has been selected");
return;
}
if (MsgNo == 0)
{
MsgNo = sockptr->NNTPNum;
if (MsgNo == 0)
{
SendSock(sockptr,"420 no current article has been selected");
return;
}
}
else
{
sockptr->NNTPNum = MsgNo;
}
Msg=MsgnotoMsg[MsgNo];
if (Msg)
{
sockprintf(sockptr, "221 %d <%s>", MsgNo, Msg->bid);
sockprintf(sockptr, "From: %s", Msg->from);
sockprintf(sockptr, "Date: %s", FormatNNTPDateAndTime((time_t)Msg->datecreated));
sockprintf(sockptr, "Newsgroups: %s.s", Msg->to, Msg->via);
sockprintf(sockptr, "Subject: %s", Msg->title);
sockprintf(sockptr, "Message-ID: <%s>", Msg->bid);
sockprintf(sockptr, "Path: %s", BBSName);
SendSock(sockptr,".");
return;
}
SendSock(sockptr,"423 No such article in this newsgroup");
return;
}
if(_memicmp(Buffer, "ARTICLE", 7) == 0)
{
struct NNTPRec * REC = sockptr->NNTPGroup;
struct MsgInfo * Msg;
int MsgNo = atoi(&Buffer[8]);
char * msgbytes;
char * Path;
if (REC == NULL)
{
SendSock(sockptr,"412 no newsgroup has been selected");
return;
}
if (MsgNo == 0)
{
MsgNo = sockptr->NNTPNum;
if (MsgNo == 0)
{
SendSock(sockptr,"420 no current article has been selected");
return;
}
}
else
{
sockptr->NNTPNum = MsgNo;
}
Msg=MsgnotoMsg[MsgNo];
if (Msg)
{
sockprintf(sockptr, "220 %d <%s>", MsgNo, Msg->bid);
msgbytes = ReadMessageFile(Msg->number);
Path = GetPathFromHeaders(msgbytes);
sockprintf(sockptr, "From: %s", Msg->from);
sockprintf(sockptr, "Date: %s", FormatNNTPDateAndTime((time_t)Msg->datecreated));
sockprintf(sockptr, "Newsgroups: %s.%s", Msg->to, Msg->via);
sockprintf(sockptr, "Subject: %s", Msg->title);
sockprintf(sockptr, "Message-ID: <%s>", Msg->bid);
sockprintf(sockptr, "Path: %s", &Path[1]);
SendSock(sockptr,"");
SendSock(sockptr,msgbytes);
SendSock(sockptr,"");
SendSock(sockptr,".");
free(msgbytes);
free(Path);
return;
}
SendSock(sockptr,"423 No such article in this newsgroup");
return;
}
if(_memicmp(Buffer, "BODY", 4) == 0)
{
struct NNTPRec * REC = sockptr->NNTPGroup;
struct MsgInfo * Msg;
int MsgNo = atoi(&Buffer[8]);
char * msgbytes;
char * Path;
if (REC == NULL)
{
SendSock(sockptr,"412 no newsgroup has been selected");
return;
}
if (MsgNo == 0)
{
MsgNo = sockptr->NNTPNum;
if (MsgNo == 0)
{
SendSock(sockptr,"420 no current article has been selected");
return;
}
}
else
{
sockptr->NNTPNum = MsgNo;
}
Msg=MsgnotoMsg[MsgNo];
if (Msg)
{
sockprintf(sockptr, "222 %d <%s>", MsgNo, Msg->bid);
msgbytes = ReadMessageFile(Msg->number);
Path = GetPathFromHeaders(msgbytes);
SendSock(sockptr,msgbytes);
SendSock(sockptr,"");
SendSock(sockptr,".");
free(msgbytes);
free(Path);
return;
}
SendSock(sockptr,"423 No such article in this newsgroup");
return;
}
if(_memicmp(Buffer, "XHDR",4) == 0)
{
struct NNTPRec * REC = sockptr->NNTPGroup;
struct MsgInfo * Msg;
int MsgStart, MsgEnd, MsgNo, fields;
char Header[100];
if (REC == NULL)
{
SendSock(sockptr,"412 no newsgroup has been selected");
return;
}
// XHDR subject nnnn-nnnn
fields = sscanf(&Buffer[5], "%s %d-%d", &Header[0], &MsgStart, &MsgEnd);
if (fields > 1)
MsgNo = MsgStart;
if (fields == 2)
MsgEnd = MsgStart;
if (MsgNo == 0)
{
MsgStart = MsgEnd = sockptr->NNTPNum;
if (MsgStart == 0)
{
SendSock(sockptr,"420 no current article has been selected");
return;
}
}
else
{
sockptr->NNTPNum = MsgEnd;
}
sockprintf(sockptr, "221 ");
for (MsgNo = MsgStart; MsgNo <= MsgEnd; MsgNo++)
{
Msg=MsgnotoMsg[MsgNo];
if (Msg)
{
char FullGroup[100];
sprintf(FullGroup, "%s.%s", Msg->to, Msg->via );
if (_stricmp(FullGroup, REC->NewsGroup) == 0)
{
if (_stricmp(Header, "subject") == 0)
sockprintf(sockptr, "%d Subject: %s", MsgNo, Msg->title);
else if (_stricmp(Header, "from") == 0)
sockprintf(sockptr, "%d From: %s", MsgNo, Msg->from);
else if (_stricmp(Header, "date") == 0)
sockprintf(sockptr, "%d Date: %s", MsgNo, FormatNNTPDateAndTime((time_t)Msg->datecreated));
else if (_stricmp(Header, "message-id") == 0)
sockprintf(sockptr, "%d Message-ID: <%s>", MsgNo, Msg->bid);
else if (_stricmp(Header, "lines") == 0)
sockprintf(sockptr, "%d Lines: %d", MsgNo, Msg->length);
}
}
}
SendSock(sockptr,".");
return;
}
if(_memicmp(Buffer, "XOVER", 5) == 0)
{
struct NNTPRec * REC = sockptr->NNTPGroup;
struct MsgInfo * Msg;
int MsgStart, MsgEnd, MsgNo, fields;
if (REC == NULL)
{
SendSock(sockptr,"412 no newsgroup has been selected");
return;
}
fields = sscanf(&Buffer[6], "%d-%d", &MsgStart, &MsgEnd);
if (fields > 0)
MsgNo = MsgStart;
if (fields == 1)
MsgEnd = MsgStart;
if (MsgNo == 0)
{
MsgStart = MsgEnd = sockptr->NNTPNum;
if (MsgStart == 0)
{
SendSock(sockptr,"420 no current article has been selected");
return;
}
}
else
{
sockptr->NNTPNum = MsgEnd;
}
sockprintf(sockptr, "224 ");
for (MsgNo = MsgStart; MsgNo <= MsgEnd; MsgNo++)
{
Msg=MsgnotoMsg[MsgNo];
if (Msg)
{
char FullGroup[100];
sprintf(FullGroup, "%s.%s", Msg->to, Msg->via );
if (_stricmp(FullGroup, REC->NewsGroup) == 0)
{
// subject, author, date, message-id, references, byte count, and line count.
sockprintf(sockptr, "%d\t%s\t%s\t%s\t%s\t%s\t%d\t%d",
MsgNo, Msg->title, Msg->from, FormatNNTPDateAndTime((time_t)Msg->datecreated), Msg->bid,
"", Msg->length, Msg->length);
}
}
}
SendSock(sockptr,".");
return;
}
/*
240 article posted ok
340 send article to be posted. End with <CR-LF>.<CR-LF>
440 posting not allowed
441 posting failed
*/
if(_memicmp(Buffer, "POST", 4) == 0)
{
if (sockptr->State != Authenticated)
{
sockprintf(sockptr, "480 Authentication required");
return;
}
sockptr->MailBuffer=malloc(10000);
sockptr->MailBufferSize=10000;
if (sockptr->MailBuffer == NULL)
{
CriticalErrorHandler("Failed to create POP3 Message Buffer");
SendSock(sockptr, "QUIT");
sockptr->State = WaitingForQUITResponse;
shutdown(sock, 0);
return;
}
sockptr->Flags |= GETTINGMESSAGE;
SendSock(sockptr, "340 OK");
return;
}
if(_memicmp(Buffer, "QUIT", 4) == 0)
{
SendSock(sockptr, "205 OK");
Sleep(500);
shutdown(sock, 0);
return;
}
/* if(memcmp(Buffer, "RSET\r\n", 6) == 0)
{
SendSock(sockptr, "250 Ok");
sockptr->State = 0;
sockptr->Recipients;
return;
}
*/
if(memcmp(Buffer, "DATE", 4) == 0)
{
//This command returns a one-line response code of 111 followed by the
//GMT date and time on the server in the form YYYYMMDDhhmmss.
// 111 YYYYMMDDhhmmss
struct tm *tm;
char Date[32];
time_t Time = time(NULL);
tm = gmtime(&Time);
if (tm)
{
sprintf_s(Date, sizeof(Date), "111 %04d%02d%02d%02d%02d%02d",
tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
SendSock(sockptr, Date);
}
else
SendSock(sockptr, "500 command not recognized");
return;
}
SendSock(sockptr, "500 command not recognized");
return;
}
int NNTP_Read(SocketConn * sockptr, SOCKET sock)
{
int InputLen, MsgLen;
char * ptr, * ptr2;
char Buffer[2000];
// May have several messages per packet, or message split over packets
if (sockptr->InputLen > 1000) // Shouldnt have lines longer than this in text mode
{
sockptr->InputLen=0;
}
InputLen=recv(sock, &sockptr->TCPBuffer[sockptr->InputLen], 1000, 0);
if (InputLen <= 0)
{
int x = WSAGetLastError();
closesocket(sock);
ReleaseSock(sock);
return 0; // Does this mean closed?
}
sockptr->InputLen += InputLen;
loop:
ptr = memchr(sockptr->TCPBuffer, '\n', sockptr->InputLen);
if (ptr) // CR in buffer
{
ptr2 = &sockptr->TCPBuffer[sockptr->InputLen];
ptr++; // Assume LF Follows CR
if (ptr == ptr2)
{
// Usual Case - single meg in buffer
ProcessNNTPServerMessage(sockptr, sockptr->TCPBuffer, sockptr->InputLen);
sockptr->InputLen=0;
}
else
{
// buffer contains more that 1 message
MsgLen = sockptr->InputLen - (int)(ptr2-ptr);
memcpy(Buffer, sockptr->TCPBuffer, MsgLen);
ProcessNNTPServerMessage(sockptr, Buffer, MsgLen);
memmove(sockptr->TCPBuffer, ptr, sockptr->InputLen-MsgLen);
sockptr->InputLen -= MsgLen;
goto loop;
}
}
return 0;
}
int NNTP_Accept(SOCKET SocketId)
{
int addrlen;
SocketConn * sockptr;
u_long param = 1;
SOCKET sock;
addrlen=sizeof(struct sockaddr);
// Allocate a Socket entry
sockptr=zalloc(sizeof(SocketConn)+100);
sockptr->Next = Sockets;
Sockets=sockptr;
sock = accept(SocketId, (struct sockaddr *)&sockptr->sin, &addrlen);
if (sock == INVALID_SOCKET)
{
Logprintf(LOG_TCP, NULL, '|', "NNTP accept() failed Error %d", WSAGetLastError());
// get rid of socket record
Sockets = sockptr->Next;
free(sockptr);
return FALSE;
}
sockptr->Type = NNTPServer;
ioctl(sock, FIONBIO, &param);
sockptr->socket = sock;
sockptr->State = 0;
SendSock(sockptr, "200 BPQMail NNTP Server ready");
Logprintf(LOG_TCP, NULL, '|', "Incoming NNTP Connect Socket = %d", sock);
return 0;
}
/*
int NNTP_Data(int sock, int error, int eventcode)
{
SocketConn * sockptr;
// Find Connection Record
sockptr=Sockets;
while (sockptr)
{
if (sockptr->socket == sock)
{
switch (eventcode)
{
case FD_READ:
return NNTP_Read(sockptr,sock);
case FD_WRITE:
// Either Just connected, or flow contorl cleared
if (sockptr->SendBuffer)
// Data Queued
SendFromQueue(sockptr);
else
{
SendSock(sockptr, "200 BPQMail NNTP Server ready");
// sockptr->State = GettingUser;
}
return 0;
case FD_OOB:
return 0;
case FD_ACCEPT:
return 0;
case FD_CONNECT:
return 0;
case FD_CLOSE:
closesocket(sock);
ReleaseNNTPSock(sock);
return 0;
}
return 0;
}
else
sockptr=sockptr->Next;
}
return 0;
}
*/
VOID ReleaseNNTPSock(SOCKET sock)
{
// remove and free the socket record
SocketConn * sockptr, * lastptr;
sockptr=Sockets;
lastptr=NULL;
while (sockptr)
{
if (sockptr->socket == sock)
{
if (lastptr)
lastptr->Next=sockptr->Next;
else
Sockets=sockptr->Next;
free(sockptr);
return;
}
else
{
lastptr=sockptr;
sockptr=sockptr->Next;
}
}
return;
}
VOID SendFromQueue(SocketConn * sockptr)
{
int bytestosend = sockptr->SendSize - sockptr->SendPtr;
int bytessent;
Debugprintf("TCP - Sending %d bytes from buffer", bytestosend);
bytessent = send(sockptr->socket, &sockptr->SendBuffer[sockptr->SendPtr], bytestosend, 0);
if (bytessent == bytestosend)
{
// All Sent
free(sockptr->SendBuffer);
sockptr->SendBuffer = NULL;
}
else
{
sockptr->SendPtr += bytessent;
}
return;
}
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