Mirror/zeek
1
0
Fork 0
mirror of https://github.com/zeek/zeek.git synced 2025-10-09 18:18:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 2

Add support for mobile IPv6 Mobility Header (RFC 6275).

Browse source 
- Accessible at script-layer through 'mobile_ipv6_message' event.

- All Mobile IPv6 analysis now enabled through --enable-mobile-ipv6
  configure-time option, otherwise the mobility header, routing type 2,
  and Home Address Destination option are ignored.
This commit is contained in:
Jon Siwek 2012-04-09 14:39:00 -05:00
parent 29724415c3
commit 91330f1e1c
37 changed files with 688 additions and 134 deletions
Download patch file Download diff file Expand all files Collapse all files

62
src/IP.h
View file

@ -14,6 +14,22 @@
#include <netinet/ip.h>
#include <netinet/ip6.h>
#ifdef ENABLE_MOBILE_IPV6
#ifndef IPPROTO_MOBILITY
#define IPPROTO_MOBILITY 135
#endif
struct ip6_mobility {
uint8 ip6mob_payload;
uint8 ip6mob_len;
uint8 ip6mob_type;
uint8 ip6mob_rsv;
uint16 ip6mob_chksum;
};
#endif //ENABLE_MOBILE_IPV6
/**
* Base class for IPv6 header/extensions.
*/
@ -38,6 +54,9 @@ public:
case IPPROTO_ROUTING:
case IPPROTO_FRAGMENT:
case IPPROTO_AH:
#ifdef ENABLE_MOBILE_IPV6
case IPPROTO_MOBILITY:
#endif
((ip6_ext*)data)->ip6e_nxt = next_type;
break;
case IPPROTO_ESP:
@ -62,6 +81,9 @@ public:
case IPPROTO_ROUTING:
case IPPROTO_FRAGMENT:
case IPPROTO_AH:
#ifdef ENABLE_MOBILE_IPV6
case IPPROTO_MOBILITY:
#endif
return ((ip6_ext*)data)->ip6e_nxt;
case IPPROTO_ESP:
default:
@ -80,6 +102,9 @@ public:
case IPPROTO_HOPOPTS:
case IPPROTO_DSTOPTS:
case IPPROTO_ROUTING:
#ifdef ENABLE_MOBILE_IPV6
case IPPROTO_MOBILITY:
#endif
return 8 + 8 * ((ip6_ext*)data)->ip6e_len;
case IPPROTO_FRAGMENT:
return 8;
@ -117,13 +142,19 @@ public:
/**
* Initializes the header chain from an IPv6 header structure.
*/
IPv6_Hdr_Chain(const struct ip6_hdr* ip6) : homeAddr(0), finalDst(0)
IPv6_Hdr_Chain(const struct ip6_hdr* ip6) :
#ifdef ENABLE_MOBILE_IPV6
homeAddr(0),
#endif
finalDst(0)
{ Init(ip6, false); }
~IPv6_Hdr_Chain()
{
for ( size_t i = 0; i < chain.size(); ++i ) delete chain[i];
#ifdef ENABLE_MOBILE_IPV6
delete homeAddr;
#endif
delete finalDst;
}
@ -183,9 +214,11 @@ public:
*/
IPAddr SrcAddr() const
{
#ifdef ENABLE_MOBILE_IPV6
if ( homeAddr )
return IPAddr(*homeAddr);
else
#endif
return IPAddr(((const struct ip6_hdr*)(chain[0]->Data()))->ip6_src);
}
@ -217,8 +250,11 @@ protected:
* Initializes the header chain from an IPv6 header structure, and replaces
* the first next protocol pointer field that points to a fragment header.
*/
IPv6_Hdr_Chain(const struct ip6_hdr* ip6, uint16 next)
: homeAddr(0), finalDst(0)
IPv6_Hdr_Chain(const struct ip6_hdr* ip6, uint16 next) :
#ifdef ENABLE_MOBILE_IPV6
homeAddr(0),
#endif
finalDst(0)
{ Init(ip6, true, next); }
void Init(const struct ip6_hdr* ip6, bool set_next, uint16 next = 0);
@ -229,11 +265,13 @@ protected:
*/
void ProcessRoutingHeader(const struct ip6_rthdr* r, uint16 len);
#ifdef ENABLE_MOBILE_IPV6
/**
* Inspect a Destination Option header's options for things we need to
* remember, such as the Home Address option from Mobile IPv6.
*/
void ProcessDstOpts(const struct ip6_dest* d, uint16 len);
#endif
vector<IPv6_Hdr*> chain;
@ -242,10 +280,12 @@ protected:
*/
uint16 length;
#ifdef ENABLE_MOBILE_IPV6
/**
* Home Address of the packet's source as defined by Mobile IPv6 (RFC 6275).
*/
IPAddr* homeAddr;
#endif
/**
* The final destination address in chain's first Routing header that has
@ -345,6 +385,22 @@ public:
return ((const u_char*) ip6) + ip6_hdrs->TotalLength();
}
#ifdef ENABLE_MOBILE_IPV6
/**
* Returns a pointer to the mobility header of the IP packet, if present,
* else a null pointer.
*/
const ip6_mobility* MobilityHeader() const
{
if ( ip4 )
return 0;
else if ( (*ip6_hdrs)[ip6_hdrs->Size()-1]->Type() != IPPROTO_MOBILITY )
return 0;
else
return (const ip6_mobility*)(*ip6_hdrs)[ip6_hdrs->Size()-1]->Data();
}
#endif
/**
* Returns the length of the IP packet's payload (length of packet minus
* header length or, for IPv6, also minus length of all extension headers).