Import Tcl 8.5.15 (as of svn r89086)

generic/tclIOSock.c

@@ -0,0 +1,118 @@
+/*
+ * tclIOSock.c --
+ *
+ *	Common routines used by all socket based channel types.
+ *
+ * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include "tclInt.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 the interp's result.
+ *
+ * Side effects:
+ *	None.
+ *
+ *---------------------------------------------------------------------------
+ */
+
+int
+TclSockGetPort(
+    Tcl_Interp *interp,
+    const char *string, /* Integer or service name */
+    const char *proto, /* "tcp" or "udp", typically */
+    int *portPtr)		/* Return port number */
+{
+    struct servent *sp;		/* Protocol info for named services */
+    Tcl_DString ds;
+    const char *native;
+
+    if (Tcl_GetInt(NULL, string, portPtr) != TCL_OK) {
+	/*
+	 * Don't bother translating 'proto' to native.
+	 */
+
+	native = Tcl_UtfToExternalDString(NULL, string, -1, &ds);
+	sp = getservbyname(native, proto);		/* INTL: Native. */
+	Tcl_DStringFree(&ds);
+	if (sp != NULL) {
+	    *portPtr = ntohs((unsigned short) sp->s_port);
+	    return TCL_OK;
+	}
+    }
+    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",
+		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.
+ *
+ *----------------------------------------------------------------------
+ */
+
+#undef TclSockMinimumBuffers
+#if !defined(_WIN32) && !defined(__CYGWIN__)
+#   define SOCKET int
+#endif
+
+int
+TclSockMinimumBuffers(
+    void *sock,			/* Socket file descriptor */
+    int size)			/* Minimum buffer size */
+{
+    int current;
+    socklen_t len;
+
+    len = sizeof(int);
+    getsockopt((SOCKET)(size_t)sock, SOL_SOCKET, SO_SNDBUF, (char *)&current, &len);
+    if (current < size) {
+	len = sizeof(int);
+	setsockopt((SOCKET)(size_t)sock, SOL_SOCKET, SO_SNDBUF, (char *)&size, len);
+    }
+    len = sizeof(int);
+    getsockopt((SOCKET)(size_t)sock, SOL_SOCKET, SO_RCVBUF, (char *)&current, &len);
+    if (current < size) {
+	len = sizeof(int);
+	setsockopt((SOCKET)(size_t)sock, SOL_SOCKET, SO_RCVBUF, (char *)&size, len);
+    }
+    return TCL_OK;
+}
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */