/*************************************************************************** * 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) 1996-2022 Nmap Software LLC ("The Nmap * * Project"). Nmap is also a registered trademark of the Nmap Project. * * * * This program is distributed under the terms of the Nmap Public Source * * License (NPSL). The exact license text applying to a particular Nmap * * release or source code control revision is contained in the LICENSE * * file distributed with that version of Nmap or source code control * * revision. More Nmap copyright/legal information is available from * * https://nmap.org/book/man-legal.html, and further information on the * * NPSL license itself can be found at https://nmap.org/npsl/ . This * * header summarizes some key points from the Nmap license, but is no * * substitute for the actual license text. * * * * Nmap is generally free for end users to download and use themselves, * * including commercial use. It is available from https://nmap.org. * * * * The Nmap license generally prohibits companies from using and * * redistributing Nmap in commercial products, but we sell a special Nmap * * OEM Edition with a more permissive license and special features for * * this purpose. See https://nmap.org/oem/ * * * * If you have received a written Nmap license agreement or contract * * stating terms other than these (such as an Nmap OEM license), you may * * choose to use and redistribute Nmap under those terms instead. * * * * The official Nmap Windows builds include the Npcap software * * (https://npcap.com) for packet capture and transmission. It is under * * separate license terms which forbid redistribution without special * * permission. So the official Nmap Windows builds may not be * * redistributed without special permission (such as an Nmap OEM * * license). * * * * 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. * * * * Source code also allows you to port Nmap to new platforms, fix bugs, * * and add new features. You are highly encouraged to submit your * * changes as a Github PR or by email to the dev@nmap.org mailing list * * for possible incorporation into the main distribution. Unless you * * specify otherwise, it is understood that you are offering us very * * broad rights to use your submissions as described in the Nmap Public * * Source License Contributor Agreement. This is important because we * * fund the project by selling licenses with various terms, and also * * because the inability to relicense code has caused devastating * * problems for other Free Software projects (such as KDE and NASM). * * * * The free version of Nmap 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. Warranties, * * indemnification and commercial support are all available through the * * Npcap OEM program--see https://nmap.org/oem/ * * * ***************************************************************************/ /* 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() */