+static Plug mactcp_plug(Socket sock, Plug p)
+{
+ Actual_Socket s = (Actual_Socket) sock;
+ Plug ret = s->plug;
+
+ if (p)
+ s->plug = p;
+ return ret;
+}
+
+static void mactcp_flush(Socket s)
+{
+
+ fatalbox("mactcp_flush");
+}
+
+Socket mactcp_register(void *sock, Plug plug)
+{
+
+ fatalbox("mactcp_register");
+}
+
+static TCPNotifyUPP mactcp_asr_upp;
+
+Socket mactcp_new(SockAddr addr, int port, int privport, int oobinline,
+ int nodelay, int keepalive, Plug plug)
+{
+ static struct socket_function_table fn_table = {
+ mactcp_plug,
+ mactcp_close,
+ mactcp_write,
+ mactcp_write_oob,
+ mactcp_flush,
+ mactcp_set_private_ptr,
+ mactcp_get_private_ptr,
+ mactcp_set_frozen,
+ mactcp_socket_error
+ };
+ TCPiopb pb;
+ UDPiopb upb;
+ Actual_Socket ret;
+ ip_addr dstaddr;
+ size_t buflen;
+
+ /*
+ * Create Socket structure.
+ */
+ ret = snew(struct Socket_tag);
+ ret->s = 0;
+ ret->fn = &fn_table;
+ ret->err = noErr;
+ ret->plug = plug;
+ bufchain_init(&ret->output_data);
+ ret->connected = 0; /* to start with */
+ ret->writable = 0; /* to start with */
+ ret->sending_oob = 0;
+ ret->frozen = 0;
+ ret->frozen_readable = 0;
+ ret->localhost_only = 0; /* unused, but best init anyway */
+ ret->pending_error = 0;
+ ret->oobinline = oobinline;
+ ret->oobpending = FALSE;
+ ret->listener = 0;
+
+ dstaddr = addr->hostinfo.addr[0]; /* XXX should try all of them */
+ /*
+ * Create a TCP stream.
+ *
+ * MacTCP requires us to provide it with some buffer memory. Page
+ * 31 of the Programmer's Guide says it should be a minimum of
+ * 4*MTU+1024. Page 36 says a minimum of 4096 bytes. Assume
+ * they're both correct.
+ */
+ assert(addr->resolved);
+ upb.ioCRefNum = mactcp.refnum;
+ upb.csCode = UDPMaxMTUSize;
+ upb.csParam.mtu.remoteHost = dstaddr;
+ upb.csParam.mtu.userDataPtr = NULL;
+ ret->err = PBControlSync((ParmBlkPtr)&upb);
+ if (ret->err != noErr) return (Socket)ret;
+
+ buflen = upb.csParam.mtu.mtuSize * 4 + 1024;
+ if (buflen < 4096) buflen = 4096;
+ if (mactcp_asr_upp == NULL)
+ mactcp_asr_upp = NewTCPNotifyUPP(&mactcp_asr);
+ GetCurrentProcess(&mactcp.self);
+ pb.ioCRefNum = mactcp.refnum;
+ pb.csCode = TCPCreate;
+ pb.csParam.create.rcvBuff = snewn(buflen, char);
+ pb.csParam.create.rcvBuffLen = buflen;
+ pb.csParam.create.notifyProc = mactcp_asr_upp;
+ pb.csParam.create.userDataPtr = (Ptr)ret;
+ ret->err = PBControlSync((ParmBlkPtr)&pb);
+ if (ret->err != noErr) return (Socket)ret;
+ ret->s = pb.tcpStream;
+
+ /*
+ * Open the connection.
+ */
+ pb.ioCRefNum = mactcp.refnum;
+ pb.csCode = TCPActiveOpen;
+ pb.tcpStream = ret->s;
+ pb.csParam.open.validityFlags = 0;
+ pb.csParam.open.remoteHost = dstaddr;
+ pb.csParam.open.remotePort = port;
+ pb.csParam.open.localPort = privport ? 1023 : 0;
+ pb.csParam.open.dontFrag = FALSE;
+ pb.csParam.open.timeToLive = 0;
+ pb.csParam.open.security = 0;
+ pb.csParam.open.optionCnt = 0;
+ pb.csParam.open.userDataPtr = (Ptr)ret;
+ while (1) {
+ ret->err = PBControlSync((ParmBlkPtr)&pb);
+ if (!privport || ret->err != duplicateSocket)
+ break;
+ pb.csParam.open.localPort--;
+ if (pb.csParam.open.localPort == 0)
+ break;
+ }
+
+ if (ret->err != noErr) return (Socket)ret;
+
+ ret->connected = TRUE;
+ ret->writable = TRUE;
+
+ /* Add this to the list of all sockets */
+ ret->next = mactcp.socklist;
+ ret->prev = &mactcp.socklist;
+ if (ret->next != NULL)
+ ret->next->prev = &ret->next;
+ mactcp.socklist = ret;
+
+ sk_addr_free(addr); /* don't need this anymore */
+
+ return (Socket)ret;
+}
+
+Socket mactcp_newlistener(char *srcaddr, int port, Plug plug,
+ int local_host_only)
+{
+
+ fatalbox("mactcp_newlistener");
+}
+
+static void mactcp_close(Socket sock)
+{
+ Actual_Socket s = (Actual_Socket)sock;
+ TCPiopb pb;
+
+ /*
+ * TCPClose is equivalent to shutdown(fd, SHUT_WR), and hence
+ * leaves the Rx side open, while TCPAbort seems rather vicious,
+ * throwing away Tx data that haven't been ACKed yet. We do both
+ * in succession.
+ */
+ pb.ioCRefNum = mactcp.refnum;
+ pb.csCode = TCPClose;
+ pb.tcpStream = s->s;
+ pb.csParam.close.validityFlags = 0;
+ pb.csParam.close.userDataPtr = (Ptr)s;
+ s->err = PBControlSync((ParmBlkPtr)&pb);
+ /* Not much we can do about an error anyway. */
+
+ pb.ioCRefNum = mactcp.refnum;
+ pb.csCode = TCPAbort;
+ pb.tcpStream = s->s;
+ pb.csParam.abort.userDataPtr = (Ptr)s;
+ s->err = PBControlSync((ParmBlkPtr)&pb);
+ /* Even less we can do about an error here. */
+
+ pb.ioCRefNum = mactcp.refnum;
+ pb.csCode = TCPRelease;
+ pb.tcpStream = s->s;
+ pb.csParam.create.userDataPtr = (Ptr)s;
+ s->err = PBControlSync((ParmBlkPtr)&pb);
+ if (s->err == noErr)
+ sfree(pb.csParam.create.rcvBuff);
+
+ /* Unhitch from list of sockets */
+ *s->prev = s->next;
+ if (s->next != NULL)
+ s->next->prev = s->prev;
+
+ sfree(s);
+}
+
+static int mactcp_write(Socket sock, char const *buf, int len)
+{
+ Actual_Socket s = (Actual_Socket) sock;
+ wdsEntry wds[2];
+ TCPiopb pb;
+
+ /*
+ * Casting away const from buf should be safe -- MacTCP won't
+ * write to it.
+ */
+ wds[0].length = len;
+ wds[0].ptr = (char *)buf;
+ wds[1].length = 0;
+
+ pb.ioCRefNum = mactcp.refnum;
+ pb.csCode = TCPSend;
+ pb.tcpStream = s->s;
+ pb.csParam.send.validityFlags = 0;
+ pb.csParam.send.pushFlag = TRUE; /* XXX we want it to return. */
+ pb.csParam.send.urgentFlag = 0;
+ pb.csParam.send.wdsPtr = (Ptr)wds;
+ pb.csParam.send.userDataPtr = (Ptr)s;
+ s->err = PBControlSync((ParmBlkPtr)&pb);
+ return 0;
+}
+
+static int mactcp_write_oob(Socket sock, char const *buf, int len)
+{
+
+ fatalbox("mactcp_write_oob");
+}
+
+static pascal void mactcp_asr(StreamPtr str, unsigned short event, Ptr cookie,
+ unsigned short termin_reason,
+ struct ICMPReport *icmp)
+{
+
+ WakeUpProcess(&mactcp.self);
+}
+
+/*
+ * Called from our event loop if there's work to do.
+ */
+void mactcp_poll(void)
+{
+ Actual_Socket s, next;
+ TCPiopb pb;
+
+ for (s = mactcp.socklist; s != NULL; s = next) {
+ next = s->next;
+ do {
+ pb.ioCRefNum = mactcp.refnum;
+ pb.csCode = TCPStatus;
+ pb.tcpStream = s->s;
+ pb.csParam.status.userDataPtr = (Ptr)s;
+ s->err = PBControlSync((ParmBlkPtr)&pb);
+ if (s->err != noErr)
+ goto next_socket;
+ if (pb.csParam.status.amtUnreadData == 0)
+ break;
+ mactcp_recv(s, pb.csParam.status.amtUnreadData);
+ } while (TRUE);
+ switch (pb.csParam.status.connectionState) {
+ case TCPS_CLOSE_WAIT:
+ /* Remote end has sent us a FIN */
+ plug_closing(s->plug, NULL, 0, 0);
+ }
+ next_socket:
+ ;
+ }
+}
+
+static void mactcp_recv(Actual_Socket s, size_t len)
+{
+ rdsEntry rds[2];
+ TCPiopb pb;
+
+ if (s->frozen) return;
+
+ while (len > 0) {
+ pb.ioCRefNum = mactcp.refnum;
+ pb.csCode = TCPNoCopyRcv;
+ pb.tcpStream = s->s;
+ pb.csParam.receive.commandTimeoutValue = 0;
+ pb.csParam.receive.rdsPtr = (Ptr)rds;
+ pb.csParam.receive.rdsLength = lenof(rds) - 1;
+ pb.csParam.receive.userDataPtr = (Ptr)s;
+ s->err = PBControlSync((ParmBlkPtr)&pb);
+ if (s->err != noErr)
+ return;
+ plug_receive(s->plug, 0, rds[0].ptr, rds[0].length);
+ len -= rds[0].length;
+ pb.csCode = TCPRcvBfrReturn;
+ s->err = PBControlSync((ParmBlkPtr)&pb);
+ if (s->err != noErr)
+ return;
+ }
+}
+
+/*
+ * Each socket abstraction contains a `void *' private field in
+ * which the client can keep state.
+ */
+static void mactcp_set_private_ptr(Socket sock, void *ptr)