IPConvergenceLayerUtils.cc

Go to the documentation of this file.
00001 /*
00002  * IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING. By
00003  * downloading, copying, installing or using the software you agree to
00004  * this license. If you do not agree to this license, do not download,
00005  * install, copy or use the software.
00006  * 
00007  * Intel Open Source License 
00008  * 
00009  * Copyright (c) 2006 Intel Corporation. All rights reserved. 
00010  * 
00011  * Redistribution and use in source and binary forms, with or without
00012  * modification, are permitted provided that the following conditions are
00013  * met:
00014  * 
00015  *   Redistributions of source code must retain the above copyright
00016  *   notice, this list of conditions and the following disclaimer.
00017  * 
00018  *   Redistributions in binary form must reproduce the above copyright
00019  *   notice, this list of conditions and the following disclaimer in the
00020  *   documentation and/or other materials provided with the distribution.
00021  * 
00022  *   Neither the name of the Intel Corporation nor the names of its
00023  *   contributors may be used to endorse or promote products derived from
00024  *   this software without specific prior written permission.
00025  *  
00026  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00027  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00028  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
00029  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE INTEL OR
00030  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00031  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
00032  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00033  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00034  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00035  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00036  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00037  */
00038 
00039 #include <oasys/io/NetUtils.h>
00040 #include "IPConvergenceLayerUtils.h"
00041 
00042 namespace dtn {
00043 
00050 bool
00051 IPConvergenceLayerUtils::parse_nexthop(const char* nexthop,
00052                                        in_addr_t* addr, u_int16_t* port)
00053 {
00054     static const char* log = "/dtn/cl/iputils";
00055     const char* host;
00056     std::string tmp;
00057                         
00058     *addr = INADDR_NONE;
00059     *port = 0;
00060 
00061     // first see if there's a colon in the string -- if so, it should
00062     // separate the hostname and port, if not, then the whole string
00063     // should be a hostname.
00064     //
00065     // note that it is invalid to have more than one colon in the
00066     // string, as caught by the check after calling strtoul
00067     const char* colon = strchr(nexthop, ':');
00068     if (colon != NULL) {
00069         char* endstr;
00070         u_int32_t portval = strtoul(colon + 1, &endstr, 10);
00071         
00072         if (*endstr != '\0' || portval > 65535) {
00073             log_warn(log, "invalid port %s in next hop '%s'",
00074                      colon + 1, nexthop);
00075             return false;
00076         }
00077 
00078         *port = (u_int16_t)portval;
00079         
00080         tmp.assign(nexthop, colon - nexthop);
00081         host = tmp.c_str();
00082     } else {
00083         host = nexthop;
00084     }
00085 
00086     // now look up the hostname
00087     if (oasys::gethostbyname(host, addr) != 0) {
00088         log_warn(log, "invalid hostname '%s' in next hop %s",
00089                  host, nexthop);
00090         return false;
00091     }
00092     
00093     return true;
00094 }
00095     
00096 
00097 } // namespace dtn

Generated on Fri Dec 22 14:47:59 2006 for DTN Reference Implementation by  doxygen 1.5.1