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Diffstat (limited to '')
| -rw-r--r-- | libnetutil/ICMPv6Option.cc | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/libnetutil/ICMPv6Option.cc b/libnetutil/ICMPv6Option.cc new file mode 100644 index 0000000..04976a1 --- /dev/null +++ b/libnetutil/ICMPv6Option.cc @@ -0,0 +1,326 @@ +/*************************************************************************** + * 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) 1996-2023 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 || len<ICMPv6_OPTION_MIN_HEADER_LEN){ + return OP_FAILURE; + }else{ + int stored_len = MIN( sizeof(nping_icmpv6_option_t), len); + this->reset(); /* 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() */ |