IPConvergenceLayer.cc

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00001 /*
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00005  * install, copy or use the software.
00006  * 
00007  * Intel Open Source License 
00008  * 
00009  * Copyright (c) 2004 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
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00018  *   Redistributions in binary form must reproduce the above copyright
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00020  *   documentation and/or other materials provided with the distribution.
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00024  *   this software without specific prior written permission.
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00038 
00039 #include <oasys/io/NetUtils.h>
00040 #include "IPConvergenceLayer.h"
00041 
00042 namespace dtn {
00043 
00050 bool
00051 IPConvergenceLayer::parse_nexthop(const char* nexthop,
00052                                   in_addr_t* addr, u_int16_t* port)
00053 {
00054     const char* host;
00055     std::string tmp;
00056 
00057     *addr = INADDR_NONE;
00058     *port = 0;
00059 
00060     // first see if there's a colon in the string -- if so, it should
00061     // separate the hostname and port, if not, then the whole string
00062     // should be a hostname.
00063     //
00064     // note that it is invalid to have more than one colon in the
00065     // string, as caught by the check after calling strtoul
00066     const char* colon = strchr(nexthop, ':');
00067     if (colon != NULL) {
00068         char* endstr;
00069         u_int32_t portval = strtoul(colon + 1, &endstr, 10);
00070         
00071         if (*endstr != '\0' || portval > 65535) {
00072             log_warn("invalid port %s in next hop '%s'",
00073                      colon + 1, nexthop);
00074             return false;
00075         }
00076 
00077         *port = (u_int16_t)portval;
00078         
00079         tmp.assign(nexthop, colon - nexthop);
00080         host = tmp.c_str();
00081     } else {
00082         host = nexthop;
00083     }
00084 
00085     // now look up the hostname
00086     if (oasys::gethostbyname(host, addr) != 0) {
00087         log_warn("invalid hostname '%s' in next hop %s",
00088                  host, nexthop);
00089         return false;
00090     }
00091     
00092     return true;
00093 }
00094     
00095 
00096 } // namespace dtn

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