/*************************************************************************** * ICMPv6Header.cc -- The ICMPv6Header Class represents an ICMP version 6 * * packet. 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) 1996-2012 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 with the clarifications and exceptions described * * below. 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 "derived 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: * * o Integrates source code from Nmap * * o Reads or includes Nmap copyrighted data files, such as * * nmap-os-db or nmap-service-probes. * * o Executes Nmap and parses the results (as opposed to typical shell or * * execution-menu apps, which simply display raw Nmap output and so are * * not derivative works.) * * o Integrates/includes/aggregates Nmap into a proprietary executable * * installer, such as those produced by InstallShield. * * o Links to a library or executes a program that does any of the above * * * * The term "Nmap" should be taken to also include any portions or derived * * works of Nmap, as well as other software we distribute under this * * license such as Zenmap, Ncat, and Nping. This list is not exclusive, * * but is meant to clarify our interpretation of derived works with some * * common examples. Our interpretation applies only to Nmap--we don't * * speak for other people's GPL works. * * * * If you have any questions about the GPL licensing restrictions on using * * Nmap in non-GPL works, we would be 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. * * * * As a 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. You must obey the GNU GPL in all * * respects for all of the code used other than OpenSSL. If you modify * * this file, you may extend this exception to your version of the file, * * but you are not obligated to do so. * * * * 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 nmap-dev@insecure.org 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 GNU * * General Public License v2.0 for more details at * * http://www.gnu.org/licenses/gpl-2.0.html , or in the COPYING file * * included with Nmap. * * * ***************************************************************************/ /* This code was originally part of the Nping tool. */ #include "ICMPv6Header.h" #include "IPv6Header.h" #include /******************************************************************************/ /* CONTRUCTORS, DESTRUCTORS AND INITIALIZATION METHODS */ /******************************************************************************/ ICMPv6Header::ICMPv6Header() { this->reset(); } /* End of ICMPv6Header constructor */ ICMPv6Header::~ICMPv6Header() { } /* End of ICMPv6Header destructor */ /** Sets every attribute to its default value */ void ICMPv6Header::reset(){ memset(&this->h, 0, sizeof(nping_icmpv6_hdr_t)); h_du = (dest_unreach_msg_t *)this->h.data; h_ptb= (pkt_too_big_msg_t *)this->h.data; h_te = (time_exceeded_msg_t *)this->h.data; h_pp = (parameter_problem_msg_t *)this->h.data; h_e = (echo_msg_t *)this->h.data; h_ra = (router_advert_msg_t *)this->h.data; h_rs = (router_solicit_msg_t *)this->h.data; h_na = (neighbor_advert_msg_t *)this->h.data; h_ns = (neighbor_solicit_msg_t *)this->h.data; h_r = (redirect_msg_t *)this->h.data; h_rr = (router_renumbering_msg_t *)this->h.data; h_ni = (nodeinfo_msg_t *)this->h.data; h_mld= (mld_msg_t *)this->h.data; } /* End of reset() */ /******************************************************************************/ /* PacketElement:: OVERWRITTEN METHODS */ /******************************************************************************/ /** @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 *ICMPv6Header::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 ICMPv6Header class is able to hold a maximum of * sizeof(nping_icmpv6_hdr_t) bytes. If the supplied buffer is longer than * that, only the first 1508 bytes will be stored in the internal buffer. * @warning Supplied len MUST be at least 8 bytes (min ICMPv6 header length). * @return OP_SUCCESS on success and OP_FAILURE in case of error */ int ICMPv6Header::storeRecvData(const u8 *buf, size_t len){ if(buf==NULL || lenlength=0; return OP_FAILURE; }else{ int stored_len = MIN( sizeof(nping_icmpv6_hdr_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() */ /* Returns a protocol identifier. This is used by packet parsing funtions * that return linked lists of PacketElement objects, to determine the protocol * the object represents. */ int ICMPv6Header::protocol_id() const { return HEADER_TYPE_ICMPv6; } /* End of protocol_id() */ /** Determines if the data stored in the object after an storeRecvData() call * is valid and safe to use. This mainly checks the length of the data but may * also test the value of certain protocol fields to ensure their correctness. * @return the length, in bytes, of the header, if its found to be valid or * OP_FAILURE (-1) otherwise. */ int ICMPv6Header::validate(){ int should_have=this->getHeaderLengthFromType( this->getType() ); if(this->length < should_have){ return OP_FAILURE; }else{ /* WARNING: If we extend this class to support new ICMPv6 types with * a variable length header (not even sure they exist), we need to * parse the objects data and return our actual size, not this size that * is obtained from the type. */ return should_have; } } /* End of validate() */ /** Prints the contents of the header and calls print() on the next protocol * header in the chain (if there is any). * @return OP_SUCCESS on success and OP_FAILURE in case of error. */ int ICMPv6Header::print(FILE *output, int detail) const { fprintf(output, "ICMPv6[]"); if(this->next!=NULL){ print_separator(output, detail); next->print(output, detail); } return OP_SUCCESS; } /* End of print() */ /******************************************************************************/ /* PROTOCOL-SPECIFIC METHODS */ /******************************************************************************/ /******************************************************************************/ /* ICMPv6 COMMON HEADER */ /******************************************************************************/ /** Set ICMPv6 type field */ int ICMPv6Header::setType(u8 val){ this->h.type = val; this->length = getHeaderLengthFromType(val); return OP_SUCCESS; } /* End of setType() */ /** Returns ICMPv6 type field */ u8 ICMPv6Header::getType() const { return this->h.type; } /* End of getType() */ /* Returns true if the supplied ICMPv6 type is supported by this class */ bool ICMPv6Header::validateType(u8 val){ switch( val ){ case ICMPv6_UNREACH: case ICMPv6_PKTTOOBIG: case ICMPv6_TIMXCEED: case ICMPv6_PARAMPROB: case ICMPv6_ECHO: case ICMPv6_ECHOREPLY: case ICMPv6_ROUTERSOLICIT: case ICMPv6_ROUTERADVERT: case ICMPv6_NGHBRSOLICIT: case ICMPv6_NGHBRADVERT: case ICMPv6_REDIRECT: case ICMPv6_RTRRENUM: return true; break; default: return false; break; } return false; } /* End of validateType() */ bool ICMPv6Header::validateType(){ return validateType(this->h.type); } /* End of validateType() */ /** Set ICMPv6 code field */ int ICMPv6Header::setCode(u8 val){ this->h.code = val; return OP_SUCCESS; } /* End of setCode() */ /** Returns ICMPv6 code field */ u8 ICMPv6Header::getCode() const { return this->h.code; } /* End of getCode() */ /** Given an ICMP Type and a code, determines whether the code corresponds to * a RFC compliant code (eg: code 0x03 for "port unreachable" in ICMP * Unreachable messages) or just some other bogus code. */ bool ICMPv6Header::validateCode(u8 type, u8 code){ // switch (type){ // // case ICMPv6_UNREACH: // return (code==0); // break; // // case ICMPv6_PKTTOOBIG: // switch( code ){ // case XXXXXXXXXXXX: // case YYYYYYYYYYYY: // case ZZZZZZZZZZZZ: // return true; // break; // } // break; // // case ICMPv6_TIMXCEED: // // break; // // case ICMPv6_PARAMPROB: // // break; // // case ICMPv6_ECHO: // // break; // // case ICMPv6_ECHOREPLY: // // break; // // case ICMPv6_ROUTERSOLICIT: // case ICMPv6_ROUTERADVERT: // case ICMPv6_NGHBRSOLICIT: // case ICMPv6_NGHBRADVERT: // case ICMPv6_REDIRECT: // break; // // default: // return false; // break; // } return false; } /* End of validateCode() */ /** Computes the ICMP header checksum and sets the checksum field to the right * value. * @warning This method requires the ICMPv6Object to be linked to an IPv6Header * object, so make sure setNextElement() has been called like this: * * IPv6Header ip6; * ICMPv6Header icmp6; * [...] # Set header fields * ip6.setNextElement(&icmp6); * icmp6.setSum(); * * Note that there can be a number of extension headers between the ICMPv6 * header and the IPv6 one, but all of them need to be linked in order for this * method to traverse the list of headers and find the IPv6 source and * destination address, required to compute the checksum. So things like the * following are OK: * * IPv6Header ip6; * HopByHopHeader hop; * RoutingHeader rte; * FragmentHeader frg; * ICMPv6Header icmp6; * [...] # Set whatever header fields you need * ip6.setNextElement(&hop); * hop.setNextElement(&rte); * rte.setNextElement(&frg); * frg.setNextElement(&icmp6); * icmp6.setSum(); # setSum() will be able to reach the IPv6Header. * */ int ICMPv6Header::setSum(){ PacketElement *hdr; hdr=this->getPrevElement(); /* Traverse the list of headers backwards until we find the IPv6 header */ while(hdr!=NULL){ if (hdr->protocol_id()==HEADER_TYPE_IPv6){ IPv6Header *v6hdr=(IPv6Header *)hdr; struct in6_addr i6src, i6dst; this->h.checksum=0; memcpy(i6src.s6_addr, v6hdr->getSourceAddress(), 16); memcpy(i6dst.s6_addr, v6hdr->getDestinationAddress(), 16); u8 *buff=(u8 *)safe_malloc(this->getLen()); this->dumpToBinaryBuffer(buff, this->getLen()); this->h.checksum=ipv6_pseudoheader_cksum(&i6src, &i6dst, this->protocol_id(), this->getLen(), buff); free(buff); return OP_SUCCESS; }else{ hdr=hdr->getPrevElement(); } } return OP_FAILURE; } /* End of setSum() */ /** @warning Sum is set to supplied value with NO byte ordering conversion * performed. * @warning If sum is supplied this way, no error checks are made. Caller is * responsible for the correctness of the value. */ int ICMPv6Header::setSum(u16 s){ this->h.checksum=s; return OP_SUCCESS; } /* End of setSum() */ /** Returns the value of the checksum field. * @warning The returned value is in NETWORK byte order, no conversion is * performed */ u16 ICMPv6Header::getSum(){ return this->h.checksum; } /* End of getSum() */ /** @warning Supplied value MUST be in host byte order because it will get * converted by this method using htonl() */ int ICMPv6Header::setReserved(u32 val){ u32 aux32=0; u8 *auxpnt=(u8 *)&aux32; switch(this->h.type){ case ICMPv6_UNREACH: this->h_du->unused=htonl(val); break; case ICMPv6_TIMXCEED: this->h_te->unused=htonl(val); break; case ICMPv6_ROUTERSOLICIT: this->h_rs->reserved=htonl(val); break; case ICMPv6_NGHBRSOLICIT: this->h_ns->reserved=htonl(val); break; case ICMPv6_REDIRECT: this->h_r->reserved=htonl(val); break; case ICMPv6_NGHBRADVERT: /* The reserved field in Neighbor Advertisement messages is only * 24-bits long so we convert the supplied value to big endian and * use only the 24 least significant bits. */ aux32=htonl(val); this->h_na->reserved[0]=auxpnt[1]; this->h_na->reserved[1]=auxpnt[2]; this->h_na->reserved[2]=auxpnt[3]; break; case ICMPv6_RTRRENUM: this->h_rr->reserved=htonl(val); break; /* Types that don't have a reserved field */ case ICMPv6_ROUTERADVERT: case ICMPv6_ECHO: case ICMPv6_ECHOREPLY: case ICMPv6_PARAMPROB: case ICMPv6_PKTTOOBIG: default: return OP_FAILURE; break; } return OP_SUCCESS; } /* End of setReserved() */ /** @warning Returned value is in host byte order */ u32 ICMPv6Header::getReserved(){ u32 aux32=0; u8 *auxpnt=(u8 *)&aux32; switch(this->h.type){ case ICMPv6_UNREACH: return ntohl(this->h_du->unused); break; case ICMPv6_TIMXCEED: return ntohl(this->h_te->unused); break; case ICMPv6_ROUTERSOLICIT: return ntohl(this->h_rs->reserved); break; case ICMPv6_NGHBRSOLICIT: return ntohl(this->h_ns->reserved); break; case ICMPv6_REDIRECT: return ntohl(this->h_r->reserved); break; case ICMPv6_NGHBRADVERT: /* The reserved field in Neighbor Advertisement messages is only * 24-bits long so we extract the stored value and convert it to host * byte order. */ auxpnt[0]=0; auxpnt[1]=this->h_na->reserved[0]; auxpnt[2]=this->h_na->reserved[1]; auxpnt[3]=this->h_na->reserved[2]; return ntohl(aux32); break; case ICMPv6_RTRRENUM: return ntohl(this->h_rr->reserved); break; /* Types that don't have a reserved field */ case ICMPv6_ROUTERADVERT: case ICMPv6_ECHO: case ICMPv6_ECHOREPLY: case ICMPv6_PARAMPROB: case ICMPv6_PKTTOOBIG: default: return 0; break; } } /* End of setReserved() */ int ICMPv6Header::setUnused(u32 val){ return this->setReserved(val); } /* End of setUnused() */ u32 ICMPv6Header::getUnused(){ return this->getReserved(); } /* End of getUnused() */ int ICMPv6Header::setFlags(u8 val){ switch(this->h.type){ case ICMPv6_ROUTERADVERT: this->h_ra->autoconfig_flags=val; break; case ICMPv6_NGHBRADVERT: this->h_na->flags=val; break; case ICMPv6_RTRRENUM: this->h_rr->flags=val; break; case ICMPv6_NODEINFOQUERY: case ICMPv6_NODEINFORESP: netutil_fatal("setFlags() cannot be used in NI, use setNodeInfoFlags() instead\n"); break; /* Types that don't have a flags field */ case ICMPv6_TIMXCEED: case ICMPv6_UNREACH: case ICMPv6_ROUTERSOLICIT: case ICMPv6_NGHBRSOLICIT: case ICMPv6_REDIRECT: case ICMPv6_ECHO: case ICMPv6_ECHOREPLY: case ICMPv6_PARAMPROB: case ICMPv6_PKTTOOBIG: default: return OP_FAILURE; break; } return OP_SUCCESS; } /* End of setFlags() */ u8 ICMPv6Header::getFlags(){ switch(this->h.type){ case ICMPv6_ROUTERADVERT: return this->h_ra->autoconfig_flags; break; case ICMPv6_NGHBRADVERT: return this->h_na->flags; break; case ICMPv6_RTRRENUM: return this->h_rr->flags; break; case ICMPv6_NODEINFOQUERY: case ICMPv6_NODEINFORESP: netutil_fatal("getFlags() cannot be used in NI, use getNodeInfoFlags() instead\n"); return 0; break; /* Types that don't have a flags field */ case ICMPv6_TIMXCEED: case ICMPv6_UNREACH: case ICMPv6_ROUTERSOLICIT: case ICMPv6_NGHBRSOLICIT: case ICMPv6_REDIRECT: case ICMPv6_ECHO: case ICMPv6_ECHOREPLY: case ICMPv6_PARAMPROB: case ICMPv6_PKTTOOBIG: default: return 0; break; } } /* End of getFlags() */ /******************************************************************************/ /* ICMPv6 DESTINATION UNREACHABLE */ /******************************************************************************/ /******************************************************************************/ /* ICMPv6 PACKET TOO BIG */ /******************************************************************************/ int ICMPv6Header::setMTU(u32 mtu){ this->h_ptb->mtu=htonl(mtu); return OP_SUCCESS; } /* End of setMTU() */ u32 ICMPv6Header::getMTU(){ return ntohl(this->h_ptb->mtu); } /* End of getMTU() */ /******************************************************************************/ /* ICMPv6 TIME EXCEEDED */ /******************************************************************************/ /******************************************************************************/ /* ICMPv6 PARAMETER PROBLEM */ /******************************************************************************/ int ICMPv6Header::setPointer(u32 pnt){ this->h_pp->pointer=htonl(pnt); return OP_SUCCESS; } /* End of setPointer() */ u32 ICMPv6Header::getPointer(){ return ntohl(this->h_pp->pointer); } /* End of getPointer() */ /******************************************************************************/ /* ICMPv6 ECHO */ /******************************************************************************/ int ICMPv6Header::setIdentifier(u16 val){ this->h_e->id=htons(val); return OP_SUCCESS; } /* End of setIdentifier() */ u16 ICMPv6Header::getIdentifier(){ return ntohs(this->h_e->id); } /* End of getIdentifier() */ int ICMPv6Header::setSequence(u16 val){ switch(this->h.type){ case ICMPv6_RTRRENUM: this->h_rr->seq=htonl( ((u32)val) ); break; case ICMPv6_ECHO: case ICMPv6_ECHOREPLY: this->h_e->seq=htons(val); break; default: return OP_FAILURE; break; } return OP_SUCCESS; } /* End of setSequence() */ int ICMPv6Header::setSequence(u32 val){ switch(this->h.type){ case ICMPv6_RTRRENUM: this->h_rr->seq=htonl(val); break; case ICMPv6_ECHO: case ICMPv6_ECHOREPLY: this->h_e->seq=htons( ((u16)val) ); break; default: return OP_FAILURE; break; } return OP_SUCCESS; } /* End of setSequence() */ u32 ICMPv6Header::getSequence(){ switch(this->h.type){ case ICMPv6_RTRRENUM: return ntohl(this->h_rr->seq); break; case ICMPv6_ECHO: case ICMPv6_ECHOREPLY: return ntohl( ((u32)this->h_e->seq) ); break; } return 0; } /* End of getSequence() */ /******************************************************************************/ /* ICMPv6 ROUTER ADVERTISEMENT */ /******************************************************************************/ int ICMPv6Header::setCurrentHopLimit(u8 val){ this->h_ra->current_hop_limit=val; return OP_SUCCESS; } /* End of setCurrentHopLimit() */ u8 ICMPv6Header::getCurrentHopLimit(){ return this->h_ra->current_hop_limit; } /* End of getCurrentHopLimit() */ int ICMPv6Header::setRouterLifetime(u16 val){ this->h_ra->router_lifetime=val; return OP_SUCCESS; } /* End of setRouterLifetime() */ u16 ICMPv6Header::getRouterLifetime(){ return this->h_ra->router_lifetime; } /* End of getRouterLifetime() */ int ICMPv6Header::setReachableTime(u32 val){ this->h_ra->reachable_time=val; return OP_SUCCESS; } /* End of setReachableTime() */ u32 ICMPv6Header::getReachableTime(){ return this->h_ra->reachable_time; } /* End of getReachableTime() */ int ICMPv6Header::setRetransmissionTimer(u32 val){ this->h_ra->retransmission_timer=val; return OP_SUCCESS; } /* End of setRetransmissionTimer() */ u32 ICMPv6Header::getRetransmissionTimer(){ return this->h_ra->retransmission_timer; } /* End of getRetransmissionTimer() */ /******************************************************************************/ /* ICMPv6 ROUTER SOLICITATION */ /******************************************************************************/ /******************************************************************************/ /* ICMPv6 NEIGHBOR ADVERTISEMENT */ /******************************************************************************/ int ICMPv6Header::setTargetAddress(struct in6_addr addr){ switch(this->h.type){ case ICMPv6_NGHBRADVERT: memcpy(this->h_na->target_address, addr.s6_addr, 16); break; case ICMPv6_NGHBRSOLICIT: memcpy(this->h_ns->target_address, addr.s6_addr, 16); break; case ICMPv6_REDIRECT: memcpy(this->h_r->target_address, addr.s6_addr, 16); break; default: return OP_FAILURE; break; } return OP_SUCCESS; } /* End of setTargetAddress() */ struct in6_addr ICMPv6Header::getTargetAddress(){ struct in6_addr addr; memset(&addr, 0, sizeof(struct in6_addr)); switch(this->h.type){ case ICMPv6_NGHBRADVERT: memcpy(addr.s6_addr, this->h_na->target_address, 16); break; case ICMPv6_NGHBRSOLICIT: memcpy(addr.s6_addr, this->h_ns->target_address, 16); break; case ICMPv6_REDIRECT: memcpy(addr.s6_addr, this->h_r->target_address, 16); break; } return addr; } /* End of setTargetAddress() */ int ICMPv6Header::setDestinationAddress(struct in6_addr addr){ switch(this->h.type){ case ICMPv6_REDIRECT: memcpy(this->h_r->destination_address, addr.s6_addr, 16); break; default: return OP_FAILURE; break; } return OP_SUCCESS; } /* End of setDestinationAddress() */ struct in6_addr ICMPv6Header::getDestinationAddress(){ struct in6_addr addr; memset(&addr, 0, sizeof(struct in6_addr)); switch(this->h.type){ case ICMPv6_REDIRECT: memcpy(addr.s6_addr, this->h_r->destination_address, 16); break; } return addr; } /* End of setTargetAddress() */ /******************************************************************************/ /* ICMPv6 NEIGHBOR SOLICITATION */ /******************************************************************************/ /******************************************************************************/ /* ICMPv6 REDIRECT */ /******************************************************************************/ /******************************************************************************/ /* ICMPv6 ROUTER RENUMBERING */ /******************************************************************************/ int ICMPv6Header::setSegmentNumber(u8 val){ this->h_rr->segment_number=val; return OP_SUCCESS; } /* End of setSegmentNumber() */ u8 ICMPv6Header::getSegmentNumber(){ return this->h_rr->segment_number; } /* End of getSegmentNumber() */ int ICMPv6Header::setMaxDelay(u16 val){ switch(this->h.type){ case ICMPv6_RTRRENUM: this->h_rr->max_delay=htons(val); return OP_SUCCESS; break; case ICMPv6_GRPMEMBQUERY: case ICMPv6_GRPMEMBREP: case ICMPv6_GRPMEMBRED: this->h_mld->max_response_delay=htons(val); return OP_SUCCESS; break; default: return OP_FAILURE; break; } } /* End of setMaxDelay() */ u16 ICMPv6Header::getMaxDelay(){ switch(this->h.type){ case ICMPv6_RTRRENUM: return ntohs(this->h_rr->max_delay); break; case ICMPv6_GRPMEMBQUERY: case ICMPv6_GRPMEMBREP: case ICMPv6_GRPMEMBRED: return ntohs(this->h_mld->max_response_delay); break; default: return 0; break; } } /* End of getMaxDelay() */ /******************************************************************************/ /* ICMPv6 NODE INFORMATION QUERIES */ /******************************************************************************/ /** Set NI Qtype */ int ICMPv6Header::setQtype(u16 val){ this->h_ni->qtype = htons(val); return OP_SUCCESS; } /* End of setQtype() */ /** Returns NI Qtype */ u16 ICMPv6Header::getQtype(){ return ntohs(this->h_ni->qtype); } /* End of getQtype() */ /** Set NI Flags */ int ICMPv6Header::setNodeInfoFlags(u16 val){ this->h_ni->flags = htons(val); return OP_SUCCESS; } /* End of setNodeInfoFlags() */ /** Returns NI Flags */ u16 ICMPv6Header::getNodeInfoFlags(){ return ntohs(this->h_ni->flags); } /* End of getNodeInfoFlags() */ /* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | unused |G|S|L|C|A|T| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ /* Set NI Flag G */ int ICMPv6Header::setG(bool flag_value){ u16 current_flags = this->getNodeInfoFlags(); if(flag_value) current_flags = current_flags | 0x0020; else current_flags = current_flags & ~0x0020; this->setNodeInfoFlags(current_flags); return OP_SUCCESS; } /* End of setG() */ /* Get NI Flag G */ bool ICMPv6Header::getG(){ return this->getNodeInfoFlags() & 0x0020; } /* End of getG() */ /* Set NI Flag S */ int ICMPv6Header::setS(bool flag_value){ u16 current_flags = this->getNodeInfoFlags(); if(flag_value) current_flags = current_flags | 0x0010; else current_flags = current_flags & ~0x0010; this->setNodeInfoFlags(current_flags); return OP_SUCCESS; } /* End of setS() */ /* Get NI Flag S */ bool ICMPv6Header::getS(){ return this->getNodeInfoFlags() & 0x0010; } /* End of getS() */ /* Set NI Flag L */ int ICMPv6Header::setL(bool flag_value){ u16 current_flags = this->getNodeInfoFlags(); if(flag_value) current_flags = current_flags | 0x0008; else current_flags = current_flags & ~0x0008; this->setNodeInfoFlags(current_flags); return OP_SUCCESS; } /* End of setL() */ /* Get NI Flag L */ bool ICMPv6Header::getL(){ return this->getNodeInfoFlags() & 0x0008; } /* End of getL() */ /* Set NI Flag C */ int ICMPv6Header::setC(bool flag_value){ u16 current_flags = this->getNodeInfoFlags(); if(flag_value) current_flags = current_flags | 0x0004; else current_flags = current_flags & ~0x0004; this->setNodeInfoFlags(current_flags); return OP_SUCCESS; } /* End of setC() */ /* Get NI Flag C */ bool ICMPv6Header::getC(){ return this->getNodeInfoFlags() & 0x0004; } /* End of getC() */ /* Set NI Flag A */ int ICMPv6Header::setA(bool flag_value){ u16 current_flags = this->getNodeInfoFlags(); if(flag_value) current_flags = current_flags | 0x0002; else current_flags = current_flags & ~0x0002; this->setNodeInfoFlags(current_flags); return OP_SUCCESS; } /* End of setA() */ /* Get NI Flag A */ bool ICMPv6Header::getA(){ return this->getNodeInfoFlags() & 0x0002; } /* End of getA() */ /* Set NI Flag T */ int ICMPv6Header::setT(bool flag_value){ u16 current_flags = this->getNodeInfoFlags(); if(flag_value) current_flags = current_flags | 0x0001; else current_flags = current_flags & ~0x0001; this->setNodeInfoFlags(current_flags); return OP_SUCCESS; } /* End of setT() */ /* Get NI Flag T */ bool ICMPv6Header::getT(){ return this->getNodeInfoFlags() & 0x0001; } /* End of getT() */ /* Set the Nonce field. * @warning: Supplied buffer must contain 8 bytes. */ int ICMPv6Header::setNonce(const u8 *nonce){ if(nonce==NULL) return OP_FAILURE; memcpy(this->h_ni->nonce, nonce, NI_NONCE_LEN); return OP_SUCCESS; } /* End of setNonce() */ /* Returns a pointer to the nonce buffer. * @warning: The returned pointer is guaranteed to point to an 8-byte buffer. * However, what comes after the 8th byte is unspecified. */ u8 *ICMPv6Header::getNonce(){ return this->h_ni->nonce; } /* End of getNonce() */ /******************************************************************************/ /* MULTICAST LISTENER DISCOVERY */ /******************************************************************************/ int ICMPv6Header::setMulticastAddress(struct in6_addr addr){ switch(this->h.type){ case ICMPv6_GRPMEMBQUERY: case ICMPv6_GRPMEMBREP: case ICMPv6_GRPMEMBRED: memcpy(this->h_mld->mcast_address, addr.s6_addr, 16); break; default: return OP_FAILURE; break; } return OP_SUCCESS; } /* End of setMulticastAddress() */ struct in6_addr ICMPv6Header::getMulticastAddress(){ struct in6_addr addr; memset(&addr, 0, sizeof(struct in6_addr)); switch(this->h.type){ case ICMPv6_GRPMEMBQUERY: case ICMPv6_GRPMEMBREP: case ICMPv6_GRPMEMBRED: memcpy(addr.s6_addr, this->h_mld->mcast_address, 16); break; } return addr; } /* End of setMulticastAddress() */ /******************************************************************************/ /* MISCELLANEOUS STUFF */ /******************************************************************************/ /** Returns the standard ICMPv6 header length for the supplied ICMP message type. * @warning Return value corresponds strictly to the ICMP header, this is, * the minimum length of the ICMP header, variable length payload is never * included. For example, an ICMPv6 Redirect has a fixed header of 40 * bytes but then the packet may contain ICMPv6 options. We only return 40 * because we don't know in advance the total number of bytes for the message. * Same applies to the rest of types. */ int ICMPv6Header::getHeaderLengthFromType(u8 type){ switch( type ){ case ICMPv6_UNREACH: return ICMPv6_UNREACH_LEN; break; case ICMPv6_PKTTOOBIG: return ICMPv6_PKTTOOBIG_LEN; break; case ICMPv6_TIMXCEED: return ICMPv6_TIMXCEED_LEN; break; case ICMPv6_PARAMPROB: return ICMPv6_PARAMPROB_LEN; break; case ICMPv6_ECHO: return ICMPv6_ECHO_LEN; break; case ICMPv6_ECHOREPLY: return ICMPv6_ECHOREPLY_LEN; break; case ICMPv6_ROUTERSOLICIT: return ICMPv6_ROUTERSOLICIT_LEN; break; case ICMPv6_ROUTERADVERT: return ICMPv6_ROUTERADVERT_LEN; break; case ICMPv6_NGHBRSOLICIT: return ICMPv6_NGHBRSOLICIT_LEN; break; case ICMPv6_NGHBRADVERT: return ICMPv6_NGHBRADVERT_LEN; break; case ICMPv6_REDIRECT: return ICMPv6_REDIRECT_LEN; break; case ICMPv6_RTRRENUM: return ICMPv6_RTRRENUM_LEN; break; case ICMPv6_NODEINFOQUERY: case ICMPv6_NODEINFORESP: return ICMPv6_NODEINFO_LEN; break; case ICMPv6_GRPMEMBQUERY: case ICMPv6_GRPMEMBREP: case ICMPv6_GRPMEMBRED: return ICMPv6_MLD_LEN; break; /* Packets with non RFC-Compliant types will be represented as an 8-byte * ICMPv6 header, just like the types that don't include additional info */ default: return ICMPv6_MIN_HEADER_LEN; break; } } /* End of getHeaderLengthFromType() */ /* Returns true if the packet is an ICMPv6 error message. */ bool ICMPv6Header::isError() const { switch( this->getType() ){ case ICMPv6_UNREACH: case ICMPv6_PKTTOOBIG: case ICMPv6_TIMXCEED: case ICMPv6_PARAMPROB: return true; break; default: return false; break; } } /* End of isError() */