1 files changed, 102 insertions, 0 deletions
diff --git a/tcl/generic/tclIOSock.c b/tcl/generic/tclIOSock.c
new file mode 100644
index 00000000000..c3947804465
--- /dev/null
+++ b/tcl/generic/tclIOSock.c
@@ -0,0 +1,102 @@
+/* 
+ * tclIOSock.c --
+ *
+ *	Common routines used by all socket based channel types.
+ *
+ * Copyright (c) 1995 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * RCS: @(#) $Id$
+ */
+
+#include "tclInt.h"
+#include "tclPort.h"
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclSockGetPort --
+ *
+ *	Maps from a string, which could be a service name, to a port.
+ *	Used by socket creation code to get port numbers and resolve
+ *	registered service names to port numbers.
+ *
+ * Results:
+ *	A standard Tcl result.  On success, the port number is
+ *	returned in portPtr. On failure, an error message is left in
+ *	interp->result.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclSockGetPort(interp, string, proto, portPtr)
+    Tcl_Interp *interp;
+    char *string;		/* Integer or service name */
+    char *proto;		/* "tcp" or "udp", typically */
+    int *portPtr;		/* Return port number */
+{
+    struct servent *sp;		/* Protocol info for named services */
+    if (Tcl_GetInt(interp, string, portPtr) != TCL_OK) {
+	sp = getservbyname(string, proto);    
+	if (sp != NULL) {
+	    *portPtr = ntohs((unsigned short) sp->s_port);
+	    Tcl_ResetResult(interp);	/* clear error message */
+	    return TCL_OK;
+	}
+	return TCL_ERROR;
+    }
+    if (Tcl_GetInt(interp, string, portPtr) != TCL_OK) {
+	return TCL_ERROR;
+    }
+    if (*portPtr > 0xFFFF) {
+        Tcl_AppendResult(interp, "couldn't open socket: port number too high",
+                (char *) NULL);
+	return TCL_ERROR;
+    }
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclSockMinimumBuffers --
+ *
+ *	Ensure minimum buffer sizes (non zero).
+ *
+ * Results:
+ *	A standard Tcl result.
+ *
+ * Side effects:
+ *	Sets SO_SNDBUF and SO_RCVBUF sizes.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclSockMinimumBuffers(sock, size)
+    int sock;			/* Socket file descriptor */
+    int size;			/* Minimum buffer size */
+{
+    int current;
+    int len;
+    
+    len = sizeof(int);
+    getsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&current, &len);
+    if (current < size) {
+	len = sizeof(int);
+	setsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&size, len);
+    }
+    len = sizeof(int);
+    getsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&current, &len);
+    if (current < size) {
+	len = sizeof(int);
+	setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&size, len);
+    }
+    return TCL_OK;
+}