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/*
* Dibbler - a portable DHCPv6
*
* authors: Tomasz Mrugalski <thomson@klub.com.pl>
* Marek Senderski <msend@o2.pl>
* changes: Michal Kowalczuk <michal@kowalczuk.eu>
*
* released under GNU GPL v2 only licence
*
*/
#include "DHCPConst.h"
#include "Logger.h"
#include "SmartPtr.h"
#include "hex.h"
// standard options specified in RFC3315, pg. 99
bool OptInMsg[13][20] = {
// Client Server IA_NA IA_TA IAAddr Option Pref Elap Relay Empty Auth. Server Status Rap. User Vendor Vendor Inter. Recon. Recon.
// ID ID Request Time Msg. Empty Unica. Code Comm. Class Class Spec. ID Msg. Accept
/*Solicit */ {true, false, true, true, false, true, false, true, false, false,true, false, false, true, true, true, true, false, false,true },
/*Advertise*/{true, true , true, true, false, false,true , false,false, false,true, true, true , false,true, true, true, false, false,true },
/*Request*/ {true, true , true, true, false, true, false, true, false, false,true, false, false, false,true, true, true, false, false,true },
/*Confirm*/ {true, false, true, true, false, true, false, true, false, false,true, false, false, false,true, true, true, false, false,false},
/*Renew*/ {true, true , true, true, false, true, false, true, false, false,true, false, false, false,true, true, true, false, false, true},
/*Rebind*/ {true, false, true, true, false, true, false, true, false, false,true, false, false, false,true, true, true, false, false, true},
/*Reply*/ {true, true , true, true, false, false,true, false,false, false,true, true, true , true ,true, true, true, false, false,true },
/*Release*/ {true, true , true, true, false, true, false, true, false, false,true, false, false, false,true, true, true, false, false,false},
/*Decline*/ {true, true , true, true, false, true, false, true, false, false,true, false, false, false,true, true, true, false, false,false},
/*Reconf.*/ {true, true , false, false,false, true, false, false,false, false,true, false, false, false,false,false, false,false, true ,false},
/*Inform.*/ {true, true, false, false,false, true ,false, true, false, false,true, false, false, false,true, true, true, false, false,true},
/*R-forw.*/ {false, false, false, false,false, false,false, false,true, false,true, false, false, false,true, true, true, true , false,false},
/*R-repl.*/ {false, false, false, false,false, false,false, false,true, false,true, false, false, false,true, true, true, true , false,false},
};
int allowOptInMsg(int msg, int opt)
{
// standard options specified in RFC3315
if (msg>13)
return 1; // allow everthing in new messages
if (opt <=20) {
return OptInMsg[msg-1][opt-1];
}
// additional options: allow them
return 1;
}
/* Appearance of Options in the Options Field of DHCP Options
Option IA_NA/ IAADDR Relay Relay
Field IA_TA Forw. Reply
1 Client ID *
2 Server ID *
3 IA_NA *
4 IA_TA *
5 IAADDR *
6 ORO *
7 Preference *
8 Elapsed Time *
9 Relay Message * *
11 Authentic. *
12 Server Uni. *
13 Status Code * * *
14 Rapid Comm. *
15 User Class *
16 Vendor Class *
17 Vendor Info. *
18 Interf. ID * *
19 Reconf. MSG. *
20 Reconf. Accept *
*/
int allowOptInOpt(int msgType, int parent, int subopt) {
// additional options (not specified in RFC3315)
if (subopt>20)
return 1;
if ((msgType==RELAY_FORW_MSG)||(msgType==RELAY_REPL_MSG)) {
if ( (subopt==OPTION_INTERFACE_ID) || (subopt=OPTION_RELAY_MSG))
return 1;
return 0;
}
switch (parent) {
case 0: //Option Field
if ((subopt!=OPTION_IAADDR)&&
(subopt!=OPTION_RELAY_MSG)&&
(subopt!=OPTION_INTERFACE_ID))
return 1;
break;
case OPTION_IA_NA:
case OPTION_IA_TA:
if ((subopt==OPTION_IAADDR)||(subopt==OPTION_STATUS_CODE))
return 1;
break;
case OPTION_IAADDR:
if (subopt==OPTION_STATUS_CODE)
return 1;
if (subopt==OPTION_ADDRPARAMS)
return 1;
break;
case OPTION_IA_PD:
if ( (subopt==OPTION_IAPREFIX) || (subopt==OPTION_STATUS_CODE))
return 1;
case OPTION_LQ_QUERY:
if ( (subopt == OPTION_IAADDR) || (subopt==OPTION_CLIENTID) )
return 1;
}
return 0;
}
unsigned DIGESTSIZE[] = {
0, //NONE
32, //PLAIN
16, //HMAC-MD5
20, //HMAC-SHA1
28, //HMAC-SHA224
32, //HMAC-SHA256
48, //HMAC-SHA384
64, //HMAC-SHA512
0 //_END_
};
char *DIGESTNAME[] = {
(char *)"NONE",
(char *)"PLAIN",
(char *)"HMAC-MD5",
(char *)"HMAC-SHA-1",
(char *)"HMAC-SHA-224",
(char *)"HMAC-SHA-256",
(char *)"HMAC-SHA-384",
(char *)"HMAC-SHA-512",
(char *)"" //_END_
};
unsigned getDigestSize(enum DigestTypes type) {
if (type >= DIGEST_INVALID) {
Log(Error) << "Invalid digest type: " << type << LogEnd;
return 0;
}
return DIGESTSIZE[type];
}
char *getDigestName(enum DigestTypes type) {
return DIGESTNAME[type];
}
void PrintHex(const std::string& message, const uint8_t *buffer, unsigned len) {
Log(Debug) << message << hexToText(buffer, len, false, false) << LogEnd;
}
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