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/* macntcp.c -- macintosh nifty application library async TCP routines |
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*/ |
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/* (C) Copyright 1995 by Carnegie Mellon University |
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* All Rights Reserved. |
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* |
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* Permission to use, copy, modify, distribute, and sell this software |
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* and its documentation for any purpose is hereby granted without |
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* fee, provided that the above copyright notice appear in all copies |
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* and that both that copyright notice and this permission notice |
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* appear in supporting documentation, and that the name of Carnegie |
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* Mellon University not be used in advertising or publicity |
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* pertaining to distribution of the software without specific, |
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* written prior permission. Carnegie Mellon University makes no |
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* representations about the suitability of this software for any |
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* purpose. It is provided "as is" without express or implied |
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* warranty. |
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* |
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* CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO |
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* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY |
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* AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE |
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* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN |
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* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING |
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
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* SOFTWARE. |
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*/ |
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/* (C) Copyright 1994-1995 by Christopher J. Newman |
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* All Rights Reserved. |
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* |
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* Permission to use, copy, modify, distribute, and sell this software and its |
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* documentation for any purpose is hereby granted without fee, provided that |
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* the above copyright notice appear in all copies and that both that |
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* copyright notice and this permission notice appear in supporting |
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* documentation, and that the name of Christopher J. Newman not be used in |
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* advertising or publicity pertaining to distribution of the software without |
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* specific, written prior permission. Christopher J. Newman makes no |
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* representations about the suitability of this software for any purpose. It |
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* is provided "as is" without express or implied warranty. |
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* |
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* CHRISTOPHER J. NEWMAN DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT |
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* SHALL CHRISTOPHER J. NEWMAN BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
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* OF THIS SOFTWARE. |
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* |
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* Author: Christopher J. Newman |
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* Message: This is a nifty program. |
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*/ |
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|
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#include <string.h> |
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#include <MacTCPCommonTypes.h> |
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#include <TCPPB.h> |
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#include <AddressXlation.h> |
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#include <GetMyIPAddr.h> |
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#include "macnapp.h" |
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|
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#define DEF_STREAM_SIZE 8192 |
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#define MAX_TCPCON 16 |
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#define RDS 8 |
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|
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/* write buffer for TCP writes |
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*/ |
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typedef struct tcpwb { |
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short rused; /* number of RDS used (-1 == in TCPsend) */ |
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short wused; /* amount of small buffer used */ |
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rdsEntry rds[RDS+1]; /* array of RDS pointers */ |
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char fflag[RDS+1]; /* free flags for RDS pointers (1 = call DisposPtr) */ |
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char *buf; /* write buffer */ |
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} tcpwb; |
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|
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/* structure describing a TCP connection |
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*/ |
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typedef struct tcpinfo { |
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short state; /* current state */ |
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short rclose; /* remote host wants to close */ |
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short lclose; /* local host wants to close */ |
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int havedata:1; /* data is available to read */ |
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int urgent:1; /* TCP in urgent mode */ |
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int push:1; /* next write should be pushed */ |
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int pushed:1; /* last write was pushed */ |
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int reading:1; /* reading data */ |
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int server:1; /* is a server, rather than client */ |
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int gethost:1; /* getting hostname -- not a real connection */ |
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int dnrdone:1; /* DNR query is done */ |
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short wbnum; /* write buffer for next write */ |
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unsigned short wbsize; /* size of write buffer */ |
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unsigned short reason; /* reason for TCP termination */ |
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StreamPtr stream; /* TCP stream */ |
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ip_port port; /* TCP port number to connect to */ |
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void *context; /* user context */ |
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na_tcpreadp *callback; /* callback function */ |
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rdsEntry rrds[RDS+1]; /* read RDS structure */ |
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tcpwb wb[2]; /* write buffers */ |
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struct hostInfo host; /* hostname & ip_addr of host */ |
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TCPiopb pb; /* parameter block for TCP connect/write/close */ |
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TCPiopb rpb; /* parameter block for TCP read */ |
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char buf[1]; /* stream buffer follows */ |
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} tcpinfo; |
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|
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/* TCP task state information |
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*/ |
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struct tcpstate { |
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na_win win; |
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short tcp_driver; |
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na_tcpinitp *tcp_initp; |
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tcpinfo *tcpbufs[MAX_TCPCON]; |
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IOParam *open_pb; |
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long waiticks, waitstart; |
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short waitpercent; |
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long streamsize; |
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byte TOS, precedence; |
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unsigned short wbsize; |
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char localhost[256]; |
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} **tcpstate = NULL; |
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#define tstate ((struct tcpstate *) win) |
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|
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/* tcp state bitmasks */ |
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#define TCP_PBINUSE 0x04 /* tcp->pb in use */ |
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#define TCP_DNSINUSE 0x08 /* DNS in use */ |
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#define TCP_NOTREADY 0x10 /* not ready for reading */ |
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/* tcp states */ |
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#define TCP_READY 1 /* inactive */ |
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#define TCP_RESOLVE (TCP_NOTREADY + TCP_DNSINUSE + 0) /* resolving hostname */ |
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#define TCP_GETHOST (TCP_NOTREADY + TCP_DNSINUSE + 1) /* looking up hostname */ |
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#define TCP_WRITING (TCP_PBINUSE + 0) /* writing data */ |
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#define TCP_CONNECT (TCP_NOTREADY + TCP_PBINUSE + 0) /* waiting for a connection */ |
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#define TCP_CLOSING (TCP_NOTREADY + TCP_PBINUSE + 1) /* waiting for TCPclose */ |
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#define TCP_CLOSED 2 /* closed */ |
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|
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/* free write buffer storage |
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*/ |
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static void freewb(tcpwb *wb) |
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{ |
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short i; |
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|
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for (i = 0; wb->rds[i].length; ++i) { |
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if (wb->fflag[i]) { |
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DisposPtr(wb->rds[i].ptr); |
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wb->fflag[i] = 0; |
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} |
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} |
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wb->rused = 0; |
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wb->wused = 0; |
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} |
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|
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/* make sure tcp_driver is open |
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*/ |
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static short tcp_checkdriver() |
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{ |
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short msg = NATCP_nodriver; |
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struct tcpstate *ts = *tcpstate; |
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IOParam *opb = ts->open_pb; |
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|
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if (!opb) return (1); |
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if (opb->ioResult == 1) return (0); |
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if (opb->ioResult == noErr && OpenResolver(nil) == noErr) { |
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ts->tcp_driver = opb->ioRefNum; |
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msg = NATCP_connect; |
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} |
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DisposPtr((Ptr) opb); |
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ts = *tcpstate; |
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ts->open_pb = NULL; |
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(*ts->tcp_initp)(msg); |
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|
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return (1); |
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} |
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|
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/* wait for MacTCP to finish whatever it's doing, with user cancel |
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*/ |
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static short tcp_wait(struct tcpstate *ts, tcpinfo *tcp) |
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{ |
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KeyMap mapkeys; |
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#define keys ((unsigned char *)mapkeys) |
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short percent; |
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|
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while (!tcp_checkdriver() |
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|| (tcp && (tcp->state & TCP_DNSINUSE) && ! (volatile) tcp->dnrdone) |
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|| (tcp && (tcp->state & TCP_PBINUSE) && (volatile short) tcp->pb.ioResult == 1)) { |
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if (ts) { |
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if (!ts->waiticks) return (0); |
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percent = ((TickCount() - ts->waitstart) * 100) / ts->waiticks; |
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if (percent > 100) percent = 100; |
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if (percent != ts->waitpercent) { |
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(*ts->tcp_initp)(ts->waitpercent = percent); |
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} |
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if (percent == 100) return (0); |
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} |
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SystemTask(); |
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GetKeys(mapkeys); |
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if ((keys[0x37 >> 3] >> (0x37 & 7)) |
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& (keys[0x2f >> 3] >> (0x2f & 7)) & 1) { |
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return (0); |
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} |
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} |
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|
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return (1); |
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} |
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|
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/* clean up the TCP task |
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*/ |
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static short tcp_closep(na_win *win) |
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{ |
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short i, j; |
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tcpinfo *tcp; |
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tcpwb *wb; |
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TCPiopb pb; |
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|
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tstate->waitstart = TickCount(); |
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tstate->waitpercent = 0; |
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tcp_wait(tstate, NULL); |
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memset((void *) &pb, 0, sizeof (pb)); |
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for (i = 0; i < MAX_TCPCON; ++i) { |
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if ((tcp = tstate->tcpbufs[i]) != NULL) { |
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/* wait for MacTCP to finish what it's doing, but permit user cancel */ |
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if (!tcp->server || tcp->state != TCP_CONNECT) tcp_wait(tstate, tcp); |
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if (!tcp->gethost) { |
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pb.ioCRefNum = tstate->tcp_driver; |
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pb.tcpStream = tcp->stream; |
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pb.csCode = TCPRelease; |
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PBControl((ParmBlkPtr) &pb, false); |
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} |
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freewb(tcp->wb); |
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freewb(tcp->wb + 1); |
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DisposPtr((Ptr) tcp); |
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tstate->tcpbufs[i] = NULL; |
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} |
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} |
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tcpstate = NULL; |
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if (tstate->tcp_driver) CloseResolver(); |
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|
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return (NA_CLOSED); |
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} |
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|
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/* begin writing data |
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*/ |
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static short beginwrite(tcpinfo *tcp) |
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{ |
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tcpwb *wb = tcp->wb + tcp->wbnum; |
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|
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/* if connection terminated, or we've sent a TCPclose, we can't write */ |
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if (tcp->rclose == 3 || tcp->lclose > 1) return (0); |
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memset((void *) &tcp->pb.csParam, 0, sizeof (tcp->pb.csParam)); |
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tcp->pb.csCode = TCPSend; |
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tcp->pb.csParam.send.ulpTimeoutValue = 60; /* 1 minute to send data */ |
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tcp->pb.csParam.send.ulpTimeoutAction = 0; |
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tcp->pb.csParam.send.validityFlags = 0xC0; |
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tcp->pb.csParam.send.wdsPtr = (Ptr) wb->rds; |
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tcp->pb.csParam.send.pushFlag = tcp->pushed = tcp->push; |
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PBControl((ParmBlkPtr) &tcp->pb, true); |
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tcp->push = 0; |
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tcp->wbnum = 1 - tcp->wbnum; |
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wb->rused = -1; |
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|
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return (tcp->state = TCP_WRITING); |
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} |
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|
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/* do I/O polling |
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*/ |
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short NATCPtask(na_win *win) |
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{ |
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tcpinfo *tcp; |
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rdsEntry *rds, *trds; |
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short result, newstate; |
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short processed = NA_PROCESSED; |
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na_tcp i; |
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tcpwb *wb; |
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int j; |
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|
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/* finish off driver initialization: */ |
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if (!tstate->tcp_driver) { |
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if (!tcp_checkdriver()) return (NA_NOTPROCESSED); |
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if (!tstate->tcp_driver) return (NA_REQCLOSE); |
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} |
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/* loop through connections */ |
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for (i = 0; i < MAX_TCPCON; ++i) { |
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if ((tcp = tstate->tcpbufs[i]) != NULL) do { |
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/* read data if we have it */ |
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if (!tcp->reading && !tcp->rclose && tcp->havedata && tcp->state != TCP_CONNECT) { |
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tcp->rpb.ioCRefNum = tstate->tcp_driver; |
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tcp->rpb.tcpStream = tcp->stream; |
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tcp->rpb.csCode = TCPNoCopyRcv; |
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tcp->rpb.csParam.receive.rdsPtr = (Ptr) tcp->rrds; |
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tcp->rpb.csParam.receive.commandTimeoutValue = 5; |
| 286 |
tcp->rpb.csParam.receive.rdsLength = RDS; |
| 287 |
if (tcp->pushed) { |
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tcp->rpb.csParam.receive.commandTimeoutValue = 1; |
| 289 |
tcp->rpb.csParam.receive.rdsLength = 1; |
| 290 |
} |
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tcp->havedata = 0; |
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PBControl((ParmBlkPtr) &tcp->rpb, tcp->pushed ? false : true); |
| 293 |
tcp->reading = 1; |
| 294 |
tcp->pushed = 0; |
| 295 |
} |
| 296 |
if (tcp->reading) { |
| 297 |
if ((result = tcp->rpb.ioResult) == 1) { |
| 298 |
processed = NA_NOTPROCESSED; |
| 299 |
} else { |
| 300 |
tcp->reading = 0; |
| 301 |
if (result != noErr) { |
| 302 |
if (result != commandTimeout) { |
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(*tcp->callback)(tcp->context, i, NATCP_noread, result, NULL); |
| 304 |
} |
| 305 |
} else { |
| 306 |
result = NATCP_data | NATCP_more; |
| 307 |
if (tcp->rpb.csParam.receive.urgentFlag) tcp->urgent = 1; |
| 308 |
if (tcp->urgent) result |= NATCP_urgent; |
| 309 |
if (tcp->rpb.csParam.receive.markFlag) tcp->urgent = 0; |
| 310 |
for (rds = tcp->rrds; rds->length; ++rds) { |
| 311 |
if (!rds[1].length) result &= ~NATCP_more; |
| 312 |
(*tcp->callback)(tcp->context, i, result, |
| 313 |
rds->length, rds->ptr); |
| 314 |
} |
| 315 |
tcp->rpb.csCode = TCPRcvBfrReturn; |
| 316 |
PBControl((ParmBlkPtr) &tcp->rpb, false); |
| 317 |
} |
| 318 |
} |
| 319 |
} |
| 320 |
result = tcp->pb.ioResult; |
| 321 |
newstate = 0; |
| 322 |
switch (tcp->state) { |
| 323 |
case TCP_GETHOST: |
| 324 |
if (tcp->dnrdone) { |
| 325 |
tcp->rclose = 3; |
| 326 |
newstate = TCP_CLOSED; |
| 327 |
if (tcp->host.rtnCode != noErr) { |
| 328 |
(*tcp->callback)(tcp->context, i, NATCP_nohost, |
| 329 |
tcp->host.rtnCode, NULL); |
| 330 |
} else { |
| 331 |
(*tcp->callback)(tcp->context, i, NATCP_connect, |
| 332 |
strlen(tcp->host.cname), tcp->host.cname); |
| 333 |
strcpy(tstate->localhost, tcp->host.cname); |
| 334 |
} |
| 335 |
} |
| 336 |
break; |
| 337 |
case TCP_RESOLVE: |
| 338 |
if (tcp->dnrdone) { |
| 339 |
if (tcp->host.rtnCode != noErr) { |
| 340 |
tcp->rclose = 3; |
| 341 |
newstate = TCP_CLOSED; |
| 342 |
(*tcp->callback)(tcp->context, i, NATCP_nohost, |
| 343 |
tcp->host.rtnCode, NULL); |
| 344 |
} else if (!tcp->lclose) { |
| 345 |
memset((void *) &tcp->pb, 0, sizeof (tcp->pb)); |
| 346 |
tcp->pb.ioCRefNum = tstate->tcp_driver; |
| 347 |
tcp->pb.tcpStream = tcp->stream; |
| 348 |
tcp->pb.csParam.open.ulpTimeoutValue = 30; |
| 349 |
tcp->pb.csParam.open.ulpTimeoutAction = 1; /* Abort on timeout */ |
| 350 |
tcp->pb.csParam.open.tosFlags = tstate->TOS; |
| 351 |
tcp->pb.csParam.open.precedence = tstate->precedence; |
| 352 |
tcp->pb.csParam.open.validityFlags = |
| 353 |
timeoutValue|timeoutAction|typeOfService|precedence; |
| 354 |
tcp->pb.csParam.open.remoteHost = tcp->host.addr[0]; |
| 355 |
if (tcp->server) { |
| 356 |
tcp->pb.csCode = TCPPassiveOpen; |
| 357 |
tcp->pb.csParam.open.commandTimeoutValue = 0; |
| 358 |
tcp->pb.csParam.open.remotePort = 0; |
| 359 |
tcp->pb.csParam.open.localPort = tcp->port; |
| 360 |
} else { |
| 361 |
tcp->pb.csCode = TCPActiveOpen; |
| 362 |
tcp->pb.csParam.open.remotePort = tcp->port; |
| 363 |
tcp->pb.csParam.open.localPort = 0; |
| 364 |
} |
| 365 |
PBControl((ParmBlkPtr) &tcp->pb, true); |
| 366 |
newstate = TCP_CONNECT; |
| 367 |
} |
| 368 |
} |
| 369 |
break; |
| 370 |
case TCP_CONNECT: |
| 371 |
if (result == 1) { |
| 372 |
processed = NA_NOTPROCESSED; |
| 373 |
break; |
| 374 |
} |
| 375 |
if (result != noErr) { |
| 376 |
tcp->rclose = 3; |
| 377 |
newstate = TCP_CLOSED; |
| 378 |
(*tcp->callback)(tcp->context, i, NATCP_nocon, result, NULL); |
| 379 |
} else { |
| 380 |
newstate = TCP_READY; |
| 381 |
if (tcp->server) { |
| 382 |
tcp->port = tcp->pb.csParam.open.remotePort; |
| 383 |
if (!*tcp->host.cname) { |
| 384 |
AddrToStr(tcp->pb.csParam.open.remoteHost, tcp->host.cname); |
| 385 |
} |
| 386 |
} |
| 387 |
(*tcp->callback)(tcp->context, i, NATCP_connect, |
| 388 |
tcp->port, tcp->host.cname); |
| 389 |
} |
| 390 |
break; |
| 391 |
case TCP_READY: |
| 392 |
/* Write data if we have it */ |
| 393 |
wb = tcp->wb + tcp->wbnum; |
| 394 |
if (wb->rused && (newstate = beginwrite(tcp))) { |
| 395 |
break; |
| 396 |
} |
| 397 |
/* check if other side wants to close */ |
| 398 |
if (tcp->rclose == 1) { |
| 399 |
tcp->rclose = 2; |
| 400 |
(*tcp->callback)(tcp->context, i, NATCP_closing, 0, NULL); |
| 401 |
} |
| 402 |
/* check if connection needs closing at this end */ |
| 403 |
if (tcp->lclose == 1) { |
| 404 |
tcp->lclose = 2; |
| 405 |
tcp->pb.csCode = TCPClose; |
| 406 |
tcp->pb.csParam.close.validityFlags = 0xC0; |
| 407 |
tcp->pb.csParam.close.ulpTimeoutValue = 30; /* give 30 secs to close */ |
| 408 |
tcp->pb.csParam.close.ulpTimeoutAction = 0; |
| 409 |
PBControl((ParmBlkPtr) &tcp->pb, true); |
| 410 |
newstate = TCP_CLOSING; |
| 411 |
break; |
| 412 |
} |
| 413 |
/* check if connection closed at both ends */ |
| 414 |
if (tcp->rclose == 3) { |
| 415 |
(*tcp->callback)(tcp->context, i, NATCP_closed, tcp->reason, NULL); |
| 416 |
newstate = TCP_CLOSED; |
| 417 |
} |
| 418 |
break; |
| 419 |
case TCP_WRITING: |
| 420 |
if (result == 1) { |
| 421 |
processed = NA_NOTPROCESSED; |
| 422 |
break; |
| 423 |
} |
| 424 |
wb = tcp->wb; |
| 425 |
if (wb->rused != -1) ++wb; |
| 426 |
freewb(wb); |
| 427 |
if (result != noErr) { |
| 428 |
tcp->pushed = 0; |
| 429 |
(*tcp->callback)(tcp->context, i, NATCP_nowrite, result, NULL); |
| 430 |
} |
| 431 |
newstate = TCP_READY; |
| 432 |
break; |
| 433 |
case TCP_CLOSING: |
| 434 |
if (result == 1) { |
| 435 |
processed = NA_NOTPROCESSED; |
| 436 |
break; |
| 437 |
} |
| 438 |
newstate = TCP_READY; |
| 439 |
break; |
| 440 |
case TCP_CLOSED: |
| 441 |
if (!tcp->rclose) break; |
| 442 |
if (!tcp->gethost) { |
| 443 |
tcp->pb.csCode = TCPRelease; |
| 444 |
PBControl((ParmBlkPtr)&tcp->pb, false); |
| 445 |
} |
| 446 |
freewb(tcp->wb); |
| 447 |
freewb(tcp->wb + 1); |
| 448 |
DisposPtr((Ptr) tcp); |
| 449 |
tstate->tcpbufs[i] = NULL; |
| 450 |
break; |
| 451 |
} |
| 452 |
if (newstate) tcp->state = newstate; |
| 453 |
} while (newstate); |
| 454 |
} |
| 455 |
|
| 456 |
return (processed); |
| 457 |
} |
| 458 |
|
| 459 |
/* Async notification routine |
| 460 |
*/ |
| 461 |
static pascal void myTCPNotifyProc(StreamPtr stream, unsigned short eventCode, |
| 462 |
Ptr userDataPtr, unsigned short terminReason, struct ICMPReport *icmpMsg) |
| 463 |
{ |
| 464 |
tcpinfo *tcp = (tcpinfo *) userDataPtr; |
| 465 |
|
| 466 |
switch (eventCode) { |
| 467 |
case TCPTerminate: |
| 468 |
tcp->rclose = 3; |
| 469 |
tcp->reason = terminReason; |
| 470 |
break; |
| 471 |
case TCPClosing: |
| 472 |
tcp->rclose = 1; |
| 473 |
break; |
| 474 |
case TCPDataArrival: |
| 475 |
tcp->havedata = 1; |
| 476 |
break; |
| 477 |
case TCPUrgent: |
| 478 |
tcp->urgent = 1; |
| 479 |
break; |
| 480 |
} |
| 481 |
} |
| 482 |
|
| 483 |
/* DNR resultproc */ |
| 484 |
static pascal void addrproc(struct hostInfo *hinfop, char *udata) |
| 485 |
{ |
| 486 |
((tcpinfo *) udata)->dnrdone = 1; |
| 487 |
} |
| 488 |
|
| 489 |
/* callback to pass TCP info to window |
| 490 |
*/ |
| 491 |
static void winreadp(void *context, na_tcp i, short status, long len, char *buf) |
| 492 |
{ |
| 493 |
natcp_win *w; |
| 494 |
|
| 495 |
w = (natcp_win *) NAlockWindow((na_win **) context); |
| 496 |
w->s = i; |
| 497 |
(*w->readp)(&w->winp, status, len, buf); |
| 498 |
NAunlockWindowh((na_win **) context, &w->winp); |
| 499 |
} |
| 500 |
|
| 501 |
/* adjust TCP settings |
| 502 |
*/ |
| 503 |
void NATCPsettings(long streamsize, short type_of_service, short precedence, unsigned short wbsize) |
| 504 |
{ |
| 505 |
if (!streamsize) streamsize = DEF_STREAM_SIZE; |
| 506 |
(*tcpstate)->streamsize = streamsize ? streamsize : DEF_STREAM_SIZE; |
| 507 |
(*tcpstate)->TOS = type_of_service; |
| 508 |
(*tcpstate)->precedence = precedence; |
| 509 |
if (!wbsize) wbsize = 1024; |
| 510 |
(*tcpstate)->wbsize = wbsize; |
| 511 |
} |
| 512 |
|
| 513 |
/* initialize TCP system |
| 514 |
*/ |
| 515 |
void NATCPinit(na_tcpinitp *initp) |
| 516 |
{ |
| 517 |
IOParam *pb; |
| 518 |
int i; |
| 519 |
struct tcpstate *ts; |
| 520 |
|
| 521 |
pb = (IOParam *) NewPtrClear(sizeof (IOParam)); |
| 522 |
tcpstate = (struct tcpstate **) NAaddtask(NATCPtask, sizeof (struct tcpstate)); |
| 523 |
if (!tcpstate || !pb) { |
| 524 |
(*initp)(NATCP_nomem); |
| 525 |
} else { |
| 526 |
pb->ioNamePtr = "\p.IPP"; |
| 527 |
PBOpen((ParmBlkPtr) pb, true); |
| 528 |
ts = *tcpstate; |
| 529 |
for (i = 0; i < MAX_TCPCON; ++i) ts->tcpbufs[i] = NULL; |
| 530 |
ts->waiticks = 60; /* wait 1 sec for TCP close by default */ |
| 531 |
ts->win.type = NA_TCPTYPE; |
| 532 |
ts->win.closep = tcp_closep; |
| 533 |
ts->win.priority = -1; |
| 534 |
ts->tcp_initp = initp; |
| 535 |
ts->open_pb = pb; |
| 536 |
NATCPsettings(0, 0, 0, 0); |
| 537 |
} |
| 538 |
} |
| 539 |
|
| 540 |
/* get a TCP buffer block |
| 541 |
*/ |
| 542 |
static tcpinfo *getTCPbuf(na_tcpreadp *callback, void *context, int *id) |
| 543 |
{ |
| 544 |
int i; |
| 545 |
tcpinfo *tcp; |
| 546 |
|
| 547 |
/* make sure driver is open */ |
| 548 |
if (!(*tcpstate)->tcp_driver |
| 549 |
&& (!tcp_wait(NULL, NULL) || !(*tcpstate)->tcp_driver)) { |
| 550 |
(*callback)(context, -1, NATCP_nodriver, 0, NULL); |
| 551 |
return (NULL); |
| 552 |
} |
| 553 |
|
| 554 |
/* find pointer slot and create buffer */ |
| 555 |
for (i = 0; i < MAX_TCPCON && (*tcpstate)->tcpbufs[i]; ++i); |
| 556 |
if (i == MAX_TCPCON) { |
| 557 |
(*callback)(context, -1, NATCP_notcpbuf, 0, NULL); |
| 558 |
return (NULL); |
| 559 |
} |
| 560 |
tcp = (tcpinfo *) NewPtr(sizeof (tcpinfo) - 1 |
| 561 |
+ (*tcpstate)->streamsize + (unsigned long) (*tcpstate)->wbsize * 2); |
| 562 |
if (!tcp) { |
| 563 |
(*callback)(context, -1, NATCP_nomem, 0, NULL); |
| 564 |
return (NULL); |
| 565 |
}; |
| 566 |
*id = i; |
| 567 |
(*tcpstate)->tcpbufs[i] = tcp; |
| 568 |
memset((char *) tcp, 0, sizeof (tcpinfo)); |
| 569 |
|
| 570 |
/* initialize fields from global state */ |
| 571 |
tcp->wbsize = (*tcpstate)->wbsize; |
| 572 |
tcp->wb[0].buf = tcp->buf + (*tcpstate)->streamsize; |
| 573 |
tcp->wb[1].buf = tcp->wb[0].buf + tcp->wbsize; |
| 574 |
tcp->pb.ioCRefNum = (*tcpstate)->tcp_driver; |
| 575 |
tcp->context = context; |
| 576 |
tcp->callback = callback; |
| 577 |
|
| 578 |
return (tcp); |
| 579 |
} |
| 580 |
|
| 581 |
/* get host name |
| 582 |
*/ |
| 583 |
void NATCPgethost(na_tcpreadp *callback, void *context) |
| 584 |
{ |
| 585 |
int id; |
| 586 |
tcpinfo *tcp; |
| 587 |
struct IPParamBlock *ippb; |
| 588 |
na_win *win; |
| 589 |
|
| 590 |
if ((*tcpstate)->localhost[0]) { |
| 591 |
win = NAlockWindow((na_win **) tcpstate); |
| 592 |
(*callback)(context, -1, NATCP_connect, strlen(tstate->localhost), |
| 593 |
tstate->localhost); |
| 594 |
NAunlockWindowh((na_win **) tcpstate, win); |
| 595 |
} else if ((tcp = getTCPbuf(callback, context, &id)) != NULL) { |
| 596 |
/* here we make the assumption that an IP param block is smaller than |
| 597 |
* a TCP param block. This seems like a safe assumption to me. |
| 598 |
*/ |
| 599 |
ippb = (struct IPParamBlock *) &tcp->pb; |
| 600 |
/* get IP address */ |
| 601 |
ippb->ioCRefNum = (*tcpstate)->tcp_driver; |
| 602 |
ippb->csCode = ipctlGetAddr; |
| 603 |
PBControl((ParmBlkPtr)ippb, false); |
| 604 |
if (ippb->ioResult != 0) { |
| 605 |
(*callback)(context, -1, NATCP_notcpbuf, ippb->ioResult, NULL); |
| 606 |
DisposPtr((Ptr) tcp); |
| 607 |
(*tcpstate)->tcpbufs[id] = NULL; |
| 608 |
} else { |
| 609 |
/* begin IP address lookup */ |
| 610 |
tcp->dnrdone = 0; |
| 611 |
AddrToName(ippb->ourAddress, &tcp->host, addrproc, (char *) tcp); |
| 612 |
tcp->state = TCP_GETHOST; |
| 613 |
tcp->gethost = 1; |
| 614 |
} |
| 615 |
} |
| 616 |
} |
| 617 |
|
| 618 |
/* open a TCP connection |
| 619 |
*/ |
| 620 |
na_tcp NATCPopen(na_tcpreadp *callback, void *context, char *host, long port, short flags) |
| 621 |
{ |
| 622 |
int i, err = NATCP_notcpbuf; |
| 623 |
OSErr resolve = noErr; |
| 624 |
tcpinfo *tcp; |
| 625 |
|
| 626 |
if ((tcp = getTCPbuf(callback, context, &i)) == NULL) return (-1); |
| 627 |
if (flags & NATCP_server) tcp->server = 1; |
| 628 |
tcp->port = port; |
| 629 |
tcp->pb.csCode = TCPCreate; |
| 630 |
tcp->pb.csParam.create.rcvBuff = (Ptr) tcp->buf; |
| 631 |
tcp->pb.csParam.create.rcvBuffLen = (*tcpstate)->streamsize; |
| 632 |
tcp->pb.csParam.create.notifyProc = myTCPNotifyProc; |
| 633 |
tcp->pb.csParam.create.userDataPtr = (Ptr) tcp; |
| 634 |
PBControl((ParmBlkPtr)&tcp->pb, false); |
| 635 |
if (tcp->pb.ioResult == 0) { |
| 636 |
tcp->state = TCP_RESOLVE; |
| 637 |
tcp->stream = tcp->pb.tcpStream; |
| 638 |
/* a server isn't required to have a hostname */ |
| 639 |
if (!host && tcp->server) return (i); |
| 640 |
tcp->dnrdone = 0; |
| 641 |
resolve = StrToAddr(host, &tcp->host, addrproc, (char *) tcp); |
| 642 |
if (resolve == noErr) tcp->dnrdone = 1; |
| 643 |
if (resolve == cacheFault || resolve == noErr) { |
| 644 |
return (i); |
| 645 |
} |
| 646 |
err = NATCP_nohost; |
| 647 |
} |
| 648 |
DisposPtr((Ptr) tcp); |
| 649 |
(*tcpstate)->tcpbufs[i] = NULL; |
| 650 |
(*callback)(context, -1, err, resolve, NULL); |
| 651 |
|
| 652 |
return (-1); |
| 653 |
} |
| 654 |
|
| 655 |
/* open a connection to a tcp window |
| 656 |
*/ |
| 657 |
na_tcp NATCPwinopen(natcp_win *w, char *host, long port, short flags) |
| 658 |
{ |
| 659 |
return (NATCPopen(winreadp, (void *) RecoverHandle((Ptr) w), host, port, flags)); |
| 660 |
} |
| 661 |
|
| 662 |
/* pass a buffer to tcp connection for writing |
| 663 |
* dispose of -1 = copy data |
| 664 |
*/ |
| 665 |
short NATCPwrite(na_tcp i, Ptr data, long len, short dispose) |
| 666 |
{ |
| 667 |
tcpinfo *tcp = (*tcpstate)->tcpbufs[i]; |
| 668 |
rdsEntry *rds = NULL; |
| 669 |
tcpwb *wb; |
| 670 |
long totallen = 0; |
| 671 |
int j; |
| 672 |
|
| 673 |
if (tcp == NULL || tcp->lclose > 0 || tcp->rclose == 3) { |
| 674 |
return (NATCP_nocon); |
| 675 |
} |
| 676 |
wb = tcp->wb + tcp->wbnum; |
| 677 |
if (wb->rused == RDS) wb = tcp->wb + (1 - tcp->wbnum); |
| 678 |
if (wb->rused == -1 || wb->rused == RDS) return (NATCP_notcpbuf); |
| 679 |
for (j = 0; j < wb->rused; ++j) { |
| 680 |
totallen += wb->rds[j].length; |
| 681 |
} |
| 682 |
if (totallen + len >= 65535) return (NATCP_notcpbuf); |
| 683 |
rds = wb->rds + wb->rused; |
| 684 |
rds->length = len; |
| 685 |
rds->ptr = data; |
| 686 |
rds[1].length = 0; |
| 687 |
if (dispose < 0) { |
| 688 |
if (len < tcp->wbsize - wb->wused) { |
| 689 |
/* if data short enough, use small internal buffer */ |
| 690 |
rds->ptr = wb->buf + wb->wused; |
| 691 |
wb->wused += len; |
| 692 |
dispose = 0; |
| 693 |
/* If adjacent to last rds, attach to it */ |
| 694 |
if (wb->rused && rds[-1].ptr + rds[-1].length == rds->ptr) { |
| 695 |
--wb->rused; |
| 696 |
rds[-1].length += len; |
| 697 |
rds->length = 0; |
| 698 |
} |
| 699 |
} else { |
| 700 |
rds->ptr = NewPtr(len); |
| 701 |
if (!rds->ptr) return (NATCP_nomem); |
| 702 |
dispose = 1; |
| 703 |
} |
| 704 |
memcpy(rds->ptr, data, len); |
| 705 |
} |
| 706 |
wb->fflag[wb->rused++] = dispose; |
| 707 |
if (tcp->push && tcp->state == TCP_READY) { |
| 708 |
(void) beginwrite(tcp); |
| 709 |
} |
| 710 |
|
| 711 |
return (NATCP_data); |
| 712 |
} |
| 713 |
|
| 714 |
/* put a character on the TCP connection -- optimized for fast turnaround |
| 715 |
*/ |
| 716 |
short NATCPputchar(na_tcp i, char c) |
| 717 |
{ |
| 718 |
(*tcpstate)->tcpbufs[i]->push = 1; |
| 719 |
|
| 720 |
return (NATCPwrite(i, (Ptr) &c, 1, -1)); |
| 721 |
} |
| 722 |
|
| 723 |
/* close a TCP connection |
| 724 |
*/ |
| 725 |
void NATCPclose(na_tcp i) |
| 726 |
{ |
| 727 |
tcpinfo *tcp = (*tcpstate)->tcpbufs[i]; |
| 728 |
|
| 729 |
if (tcp && tcp->lclose < 1) tcp->lclose = 1; |
| 730 |
} |
| 731 |
|
| 732 |
/* dispose of all TCP system resources |
| 733 |
*/ |
| 734 |
void NATCPdone(long waiticks) |
| 735 |
{ |
| 736 |
struct tcpstate *ts; |
| 737 |
|
| 738 |
if (tcpstate) { |
| 739 |
ts = (struct tcpstate *) NAlockWindow((na_win **) tcpstate); |
| 740 |
ts->waiticks = waiticks; |
| 741 |
NAcloseWindow((na_win *) ts, NA_REQCLOSE); |
| 742 |
} |
| 743 |
} |
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