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nmap/libnetutil/ICMPv6Header.cc

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/***************************************************************************
* 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) 1996-2021 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.org) 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 "ICMPv6Header.h"
#include "IPv6Header.h"
#include <assert.h>
/******************************************************************************/
/* 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 || len<ICMPv6_MIN_HEADER_LEN){
this->length=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 {
u8 type=this->getType();
u8 code=this->getCode();
const char *typestr=this->type2string(type, code);
fprintf(output, "ICMPv6[%s", typestr);
if(detail>=PRINT_DETAIL_MED)
fprintf(output, " (type=%u/code=%u)", type, code);
switch(type) {
case ICMPv6_UNREACH:
case ICMPv6_TIMXCEED:
if(detail>=PRINT_DETAIL_HIGH)
fprintf(output, " unused=%lu", (long unsigned int)this->getUnused());
break;
case ICMPv6_ROUTERSOLICIT:
if(detail>=PRINT_DETAIL_HIGH)
fprintf(output, " reserved=%lu", (long unsigned int)this->getReserved());
break;
case ICMPv6_PKTTOOBIG:
fprintf(output, " mtu=%lu", (long unsigned int)this->getMTU());
break;
case ICMPv6_PARAMPROB:
fprintf(output, " pointer=%lu", (long unsigned int)this->getPointer());
break;
case ICMPv6_ECHO:
case ICMPv6_ECHOREPLY:
fprintf(output, " id=%u seq=%u", this->getIdentifier(), this->getSequence());
break;
case ICMPv6_NODEINFOQUERY:
case ICMPv6_NODEINFORESP:
if(this->getNodeInfoFlags()!=0){
fprintf(output, " flags=");
if(this->getNodeInfoFlags() & ICMPv6_NI_FLAG_T)
fprintf(output, "T");
if(this->getNodeInfoFlags() & ICMPv6_NI_FLAG_A)
fprintf(output, "A");
if(this->getNodeInfoFlags() & ICMPv6_NI_FLAG_C)
fprintf(output, "C");
if(this->getNodeInfoFlags() & ICMPv6_NI_FLAG_L)
fprintf(output, "L");
if(this->getNodeInfoFlags() & ICMPv6_NI_FLAG_G)
fprintf(output, "G");
if(this->getNodeInfoFlags() & ICMPv6_NI_FLAG_S)
fprintf(output, "S");
}
if(detail>=PRINT_DETAIL_HIGH){
#ifdef WIN32
fprintf(output, " nonce=%I64u", (long long unsigned int)this->getNonce());
#else
fprintf(output, " nonce=%llu", (long long unsigned int)this->getNonce());
#endif
}
break;
default:
/* Print nothing */
break;
}
if(detail>=PRINT_DETAIL_HIGH)
fprintf(output, " csum=0x%04X", ntohs(this->getSum()));
fprintf(output, "]");
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() const{
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() const {
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() const {
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() const {
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() const {
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() const {
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() const{
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() const{
switch(this->h.type){
case ICMPv6_RTRRENUM:
return ntohl(this->h_rr->seq);
break;
case ICMPv6_ECHO:
case ICMPv6_ECHOREPLY:
return (u32)ntohs(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() const {
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() const {
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() const {
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() const {
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() const {
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() const {
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() const {
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() const {
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() const {
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() const {
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() const {
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() const {
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() const {
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() const {
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() const {
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() const {
return this->getNodeInfoFlags() & 0x0001;
} /* End of getT() */
/* Set the Nonce field. */
int ICMPv6Header::setNonce(u64 nonce_value){
this->h_ni->nonce=nonce_value;
return OP_SUCCESS;
} /* End of setNonce() */
/* 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. */
u64 ICMPv6Header::getNonce() const {
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() const {
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) const {
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() */
const char *ICMPv6Header::type2string(int type, int code) const {
switch(type) {
case ICMPv6_UNREACH:
switch(code) {
case ICMPv6_UNREACH_NO_ROUTE: return "Network unreachable"; break;
case ICMPv6_UNREACH_PROHIBITED: return "Comm prohibited"; break;
case ICMPv6_UNREACH_BEYOND_SCOPE: return "Beyond scope"; break;
case ICMPv6_UNREACH_ADDR_UNREACH: return "Address unreachable"; break;
case ICMPv6_UNREACH_PORT_UNREACH: return "Port unreachable"; break;
case ICMPv6_UNREACH_SRC_ADDR_FAILED: return "Source address failed"; break;
case ICMPv6_UNREACH_REJECT_ROUTE: return "Reject route"; break;
default: return "Destination unreachable (unknown code)"; break;
}
break;
case ICMPv6_PKTTOOBIG:
return "Packet too big";
break;
case ICMPv6_TIMXCEED:
switch(code){
case ICMPv6_TIMXCEED_HOP_EXCEEDED: return "HopLimit=0 in transit"; break;
case ICMPv6_TIMXCEED_REASS_EXCEEDED: return "Reassembly time exceeded"; break;
default: return "Time exceeded (unknown code)"; break;
}
break;
case ICMPv6_PARAMPROB:
switch(code){
case ICMPv6_PARAMPROB_FIELD: return "Parameter problem (bad field)"; break;
case ICMPv6_PARAMPROB_NEXT_HDR: return "Parameter problem (next header unknown)"; break;
case ICMPv6_PARAMPROB_OPTION: return "Parameter problem (bad option)"; break;
default: return "Parameter problem (unknown code)"; break;
}
break;
case ICMPv6_ECHO:
return "Echo request";
break;
case ICMPv6_ECHOREPLY:
return "Echo reply";
break;
case ICMPv6_GRPMEMBQUERY:
return "Group membership query";
break;
case ICMPv6_GRPMEMBREP:
return "Group membership report";
break;
case ICMPv6_GRPMEMBRED:
return "Group membership reduction";
break;
case ICMPv6_ROUTERSOLICIT:
return "Router sol";
break;
case ICMPv6_ROUTERADVERT:
return "Router advert";
break;
case ICMPv6_NGHBRSOLICIT:
return "Neighbor sol";
break;
case ICMPv6_NGHBRADVERT:
return "Neighbor advert";
break;
case ICMPv6_REDIRECT:
return "Redirect";
break;
case ICMPv6_RTRRENUM:
switch(code){
case ICMPv6_RTRRENUM_COMMAND: return "Renumbering command"; break;
case ICMPv6_RTRRENUM_RESULT: return "Renumbering result"; break;
case ICMPv6_RTRRENUM_SEQ_RESET: return "Renumbering reset"; break;
default: return "Router Renumbering (unknown code)"; break;
}
break;
case ICMPv6_NODEINFOQUERY:
switch(code){
case ICMPv6_NODEINFOQUERY_IPv6ADDR: return "Node info query (IPv6 addr)"; break;
case ICMPv6_NODEINFOQUERY_NAME: return "Node info query (name)"; break;
case ICMPv6_NODEINFOQUERY_IPv4ADDR: return "Node info query (IPv4 addr)"; break;
default: return "Node info query (unknown code)"; break;
}
break;
case ICMPv6_NODEINFORESP:
switch(code){
case ICMPv6_NODEINFORESP_SUCCESS: return "Node info reply (success)"; break;
case ICMPv6_NODEINFORESP_REFUSED: return "Node info reply (refused)"; break;
case ICMPv6_NODEINFORESP_UNKNOWN: return "Node info reply (qtype unknown)"; break;
default: return "Node info reply (unknown code)"; break;
}
break;
case ICMPv6_INVNGHBRSOLICIT:
return "Inverse neighbor sol";
break;
case ICMPv6_INVNGHBRADVERT:
return "Inverse neighbor advert";
break;
case ICMPv6_MLDV2:
return "MLDv2 report";
break;
case ICMPv6_AGENTDISCOVREQ:
return "Home agent request";
break;
case ICMPv6_AGENTDISCOVREPLY:
return "Home agent reply";
break;
case ICMPv6_MOBPREFIXSOLICIT:
return "Prefix sol";
break;
case ICMPv6_MOBPREFIXADVERT:
return "Prefix advert";
break;
case ICMPv6_CERTPATHSOLICIT:
return "Cert path sol";
break;
case ICMPv6_CERTPATHADVERT:
return "Cert path advert";
break;
case ICMPv6_EXPMOBILITY:
return "Experimental mobility";
break;
case ICMPv6_MRDADVERT:
return "Multicast router advert";
break;
case ICMPv6_MRDSOLICIT:
return "Multicast router sol";
break;
case ICMPv6_MRDTERMINATE:
return "Multicast router term";
break;
case ICMPv6_FMIPV6:
return "FMIPv6";
break;
default:
return "Unknown ICMPv6 type";
break;
} /* End of ICMP Type switch */
return "Unknown ICMPv6 type";
} /* End of type2string() */
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