/*************************************************************************** * ICMPv6Option.cc -- The ICMPv6Option Class represents an ICMP version 6 * * option. It contains methods to set any header field. In general, these * * methods do error checkings and byte order conversion. * * * ***********************IMPORTANT NMAP LICENSE TERMS************************ * * * The Nmap Security Scanner is (C) 1996-2013 Insecure.Com LLC. Nmap is * * also a registered trademark of Insecure.Com LLC. This program is free * * software; you may redistribute and/or modify it under the terms of the * * GNU General Public License as published by the Free Software * * Foundation; Version 2 ("GPL"), BUT ONLY WITH ALL OF THE CLARIFICATIONS * * AND EXCEPTIONS DESCRIBED HEREIN. This guarantees your right to use, * * modify, and redistribute this software under certain conditions. If * * you wish to embed Nmap technology into proprietary software, we sell * * alternative licenses (contact sales@insecure.com). Dozens of software * * vendors already license Nmap technology such as host discovery, port * * scanning, OS detection, version detection, and the Nmap Scripting * * Engine. * * * * Note that the GPL places important restrictions on "derivative works", * * yet it does not provide a detailed definition of that term. To avoid * * misunderstandings, we interpret that term as broadly as copyright law * * allows. For example, we consider an application to constitute a * * derivative work for the purpose of this license if it does any of the * * following with any software or content covered by this license * * ("Covered Software"): * * * * o Integrates source code from Covered Software. * * * * o Reads or includes copyrighted data files, such as Nmap's nmap-os-db * * or nmap-service-probes. * * * * o Is designed specifically to execute Covered Software and parse the * * results (as opposed to typical shell or execution-menu apps, which will * * execute anything you tell them to). * * * * o Includes Covered Software in a proprietary executable installer. The * * installers produced by InstallShield are an example of this. Including * * Nmap with other software in compressed or archival form does not * * trigger this provision, provided appropriate open source decompression * * or de-archiving software is widely available for no charge. For the * * purposes of this license, an installer is considered to include Covered * * Software even if it actually retrieves a copy of Covered Software from * * another source during runtime (such as by downloading it from the * * Internet). * * * * o Links (statically or dynamically) to a library which does any of the * * above. * * * * o Executes a helper program, module, or script to do any of the above. * * * * This list is not exclusive, but is meant to clarify our interpretation * * of derived works with some common examples. Other people may interpret * * the plain GPL differently, so we consider this a special exception to * * the GPL that we apply to Covered Software. Works which meet any of * * these conditions must conform to all of the terms of this license, * * particularly including the GPL Section 3 requirements of providing * * source code and allowing free redistribution of the work as a whole. * * * * As another special exception to the GPL terms, Insecure.Com LLC grants * * permission to link the code of this program with any version of the * * OpenSSL library which is distributed under a license identical to that * * listed in the included docs/licenses/OpenSSL.txt file, and distribute * * linked combinations including the two. * * * * Any redistribution of Covered Software, including any derived works, * * must obey and carry forward all of the terms of this license, including * * obeying all GPL rules and restrictions. For example, source code of * * the whole work must be provided and free redistribution must be * * allowed. All GPL references to "this License", are to be treated as * * including the special and conditions of the license text as well. * * * * Because this license imposes special exceptions to the GPL, Covered * * Work may not be combined (even as part of a larger work) with plain GPL * * software. The terms, conditions, and exceptions of this license must * * be included as well. This license is incompatible with some other open * * source licenses as well. In some cases we can relicense portions of * * Nmap or grant special permissions to use it in other open source * * software. Please contact fyodor@nmap.org with any such requests. * * Similarly, we don't incorporate incompatible open source software into * * Covered Software without special permission from the copyright holders. * * * * If you have any questions about the licensing restrictions on using * * Nmap in other works, are happy to help. As mentioned above, we also * * offer alternative license to integrate Nmap into proprietary * * applications and appliances. These contracts have been sold to dozens * * of software vendors, and generally include a perpetual license as well * * as providing for priority support and updates. They also fund the * * continued development of Nmap. Please email sales@insecure.com for * * further information. * * * * If you received these files with a written license agreement or * * contract stating terms other than the terms above, then that * * alternative license agreement takes precedence over these comments. * * * * Source is provided to this software because we believe users have a * * right to know exactly what a program is going to do before they run it. * * This also allows you to audit the software for security holes (none * * have been found so far). * * * * Source code also allows you to port Nmap to new platforms, fix bugs, * * and add new features. You are highly encouraged to send your changes * * to the dev@nmap.org mailing list for possible incorporation into the * * main distribution. By sending these changes to Fyodor or one of the * * Insecure.Org development mailing lists, or checking them into the Nmap * * source code repository, it is understood (unless you specify otherwise) * * that you are offering the Nmap Project (Insecure.Com LLC) the * * unlimited, non-exclusive right to reuse, modify, and relicense the * * code. Nmap will always be available Open Source, but this is important * * because the inability to relicense code has caused devastating problems * * for other Free Software projects (such as KDE and NASM). We also * * occasionally relicense the code to third parties as discussed above. * * If you wish to specify special license conditions of your * * contributions, just say so when you send them. * * * * This program is distributed in the hope that it will be useful, but * * WITHOUT ANY WARRANTY; without even the implied warranty of * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the Nmap * * license file for more details (it's in a COPYING file included with * * Nmap, and also available from https://svn.nmap.org/nmap/COPYING * * * ***************************************************************************/ /* This code was originally part of the Nping tool. */ #include "ICMPv6Option.h" ICMPv6Option::ICMPv6Option() { this->reset(); } /* End of ICMPv6Option constructor */ ICMPv6Option::~ICMPv6Option() { } /* End of ICMPv6Option destructor */ /** Sets every class attribute to zero */ void ICMPv6Option::reset(){ memset(&this->h, 0, sizeof(nping_icmpv6_option_t)); h_la = (link_addr_option_t *)this->h.data; h_pi = (prefix_info_option_t *)this->h.data; h_r = (redirect_option_t *)this->h.data; h_mtu = (mtu_option_t *)this->h.data; } /* End of reset() */ /** @warning This method is essential for the superclass getBinaryBuffer() * method to work. Do NOT change a thing unless you know what you're doing */ u8 *ICMPv6Option::getBufferPointer(){ return (u8*)(&this->h); } /* End of getBufferPointer() */ /** Stores supplied packet in the internal buffer so the information * can be accessed using the standard get & set methods. * @warning The ICMPv6Option class is able to hold a maximum of * sizeof(nping_icmpv6_option_t) bytes. If the supplied buffer is longer than * that, only the first sizeof(nping_icmpv6_option_t) bytes will be stored in * the internal buffer. * @warning Supplied len MUST be at least ICMPv6_OPTION_MIN_HEADER_LEN bytes * @return OP_SUCCESS on success and OP_FAILURE in case of error */ int ICMPv6Option::storeRecvData(const u8 *buf, size_t len){ if(buf==NULL || lenreset(); /* Re-init the object, just in case the caller had used it already */ this->length=stored_len; memcpy(&(this->h), buf, stored_len); } return OP_SUCCESS; } /* End of storeRecvData() */ int ICMPv6Option::protocol_id() const { return HEADER_TYPE_ICMPv6_OPTION; } int ICMPv6Option::setType(u8 val){ this->h.type=val; this->length = getHeaderLengthFromType(val); this->h.length = this->length / 8; return OP_SUCCESS; } /* End of setType() */ u8 ICMPv6Option::getType(){ return this->h.type; } /* End of getType() */ bool ICMPv6Option::validateType(u8 val){ switch( val ){ case ICMPv6_OPTION_SRC_LINK_ADDR: case ICMPv6_OPTION_TGT_LINK_ADDR: case ICMPv6_OPTION_PREFIX_INFO: case ICMPv6_OPTION_REDIR_HDR: case ICMPv6_OPTION_MTU: return true; break; default: return false; break; } return false; } /* End of validateType() */ int ICMPv6Option::setLength(u8 val){ this->h.length=val; return OP_SUCCESS; } /* End of setLength() */ u8 ICMPv6Option::getLength(){ return this->h.length; } /* End of getLength() */ int ICMPv6Option::setLinkAddress(u8* val){ if(val==NULL) return OP_FAILURE; switch(this->h.type){ case ICMPv6_OPTION_SRC_LINK_ADDR: case ICMPv6_OPTION_TGT_LINK_ADDR: memcpy(this->h_la->link_addr, val, ICMPv6_OPTION_LINK_ADDRESS_LEN); return OP_SUCCESS; break; default: return OP_FAILURE; break; } } /* End of setLinkAddress() */ u8 *ICMPv6Option::getLinkAddress(){ switch(this->h.type){ case ICMPv6_OPTION_SRC_LINK_ADDR: case ICMPv6_OPTION_TGT_LINK_ADDR: return this->h_la->link_addr; break; default: return NULL; break; } } /* End of getLinkAddress() */ int ICMPv6Option::setPrefixLength(u8 val){ if(this->h.type!=ICMPv6_OPTION_PREFIX_INFO) return OP_FAILURE; this->h_pi->prefix_length=val; return OP_SUCCESS; } /* End of setPrefixLength() */ u8 ICMPv6Option::getPrefixLength(){ if(this->h.type!=ICMPv6_OPTION_PREFIX_INFO) return 0; else return this->h_pi->prefix_length; } /* End of getPrefixLength() */ int ICMPv6Option::setFlags(u8 val){ if(this->h.type!=ICMPv6_OPTION_PREFIX_INFO) return OP_FAILURE; this->h_pi->flags=val; return OP_SUCCESS; } /* End of setFlags() */ u8 ICMPv6Option::getFlags(){ if(this->h.type!=ICMPv6_OPTION_PREFIX_INFO) return 0; else return this->h_pi->flags; } /* End of getFlags() */ int ICMPv6Option::setValidLifetime(u32 val){ if(this->h.type!=ICMPv6_OPTION_PREFIX_INFO) return OP_FAILURE; this->h_pi->valid_lifetime=htonl(val); return OP_SUCCESS; } /* End of setValidLifetime() */ u32 ICMPv6Option::getValidLifetime(){ if(this->h.type!=ICMPv6_OPTION_PREFIX_INFO) return 0; else return ntohl(this->h_pi->valid_lifetime); } /* End of getValidLifetime() */ int ICMPv6Option::setPreferredLifetime(u32 val){ if(this->h.type!=ICMPv6_OPTION_PREFIX_INFO) return OP_FAILURE; this->h_pi->preferred_lifetime=htonl(val); return OP_SUCCESS; } /* End of setPreferredLifetime() */ u32 ICMPv6Option::getPreferredLifetime(){ if(this->h.type!=ICMPv6_OPTION_PREFIX_INFO) return 0; else return ntohl(this->h_pi->preferred_lifetime); } /* End of getPreferredLifetime() */ int ICMPv6Option::setPrefix(u8 *val){ if(val==NULL || this->h.type!=ICMPv6_OPTION_PREFIX_INFO) return OP_FAILURE; else memcpy(this->h_pi->prefix, val, 16); return OP_SUCCESS; } /* End of setPrefix() */ u8 *ICMPv6Option::getPrefix(){ if(this->h.type!=ICMPv6_OPTION_PREFIX_INFO) return NULL; else return this->h_pi->prefix; } /* End of getPrefix() */ int ICMPv6Option::setMTU(u32 val){ if(this->h.type!=ICMPv6_OPTION_MTU) return OP_FAILURE; this->h_mtu->mtu=htonl(val); return OP_SUCCESS; } /* End of setMTU() */ u32 ICMPv6Option::getMTU(){ if(this->h.type!=ICMPv6_OPTION_MTU) return 0; else return ntohl(this->h_mtu->mtu); } /* End of getMTU() */ /******************************************************************************/ /* MISCELLANEOUS STUFF */ /******************************************************************************/ /** Returns the standard ICMPv6 optiom length for the supplied option type. * @warning Return value corresponds strictly to the ICMPv7 option header, this * is, the minimum length of the OPTION, variable length payload is never * included. For example, an ICMPv6 Redirect option has a fixed header of 8 * bytes but then it may contain an IPv6 header. We only return 8 * because we don't know in advance the total number of bytes for the message. * Same applies to the rest of types. */ int ICMPv6Option::getHeaderLengthFromType(u8 type){ switch( type ){ case ICMPv6_OPTION_SRC_LINK_ADDR: return ICMPv6_OPTION_SRC_LINK_ADDR_LEN; break; case ICMPv6_OPTION_TGT_LINK_ADDR: return ICMPv6_OPTION_TGT_LINK_ADDR_LEN; break; case ICMPv6_OPTION_PREFIX_INFO: return ICMPv6_OPTION_PREFIX_INFO_LEN; break; case ICMPv6_OPTION_REDIR_HDR: return ICMPv6_OPTION_REDIR_HDR_LEN; break; case ICMPv6_OPTION_MTU: return ICMPv6_OPTION_MTU_LEN; break; /* Packets with non RFC-Compliant option types will be represented as an * 8-byte ICMPv6 option. */ default: return ICMPv6_OPTION_MIN_HEADER_LEN; break; } } /* End of getHeaderLengthFromType() */