Wireshark · Wireshark-dev: Re: [Wireshark-dev] ipv6 address help

["Anders Broman" <a.broman@xxxxxxxxx>]

Hi,
Why do you persist using the add_format versions they are to be used as
exeptions when special formatting is required, just use ...add_item and use
the apropriate FT_ type for the hf variable.
There is plenty of code examples to look at.
Anders

-----Ursprungligt meddelande-----
Från: wireshark-dev-bounces@xxxxxxxxxxxxx
[mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] För Brian Oleksa
Skickat: den 26 januari 2010 20:58
Till: Developer support list for Wireshark
Ämne: [Wireshark-dev] ipv6 address help


Wiresharkers

I was able to successfully dissect my ipv4 address by using the built in 
routines.
                        guint32 addr;
                        addr = tvb_get_ipv4(tvb,offset);
                        proto_tree_add_ipv4_format_value(helen_sub_tree, 
hf_helen_ipv4, tvb, offset, 4, addr,
                                "Address: %d.%d.%d.%d", addr & 0xff, 
(addr >> 8) & 0xff, (addr >> 16) & 0xff, addr >> 24);

I am now trying to do the same for ipv6 addresses (unfortunately.. I do 
not have a way to test it)....but I would like to get the code in place.

I have found the code in the wireshark developers readme file.... but 
not sure what to do with "struct e_in6_addr *addr" in the void 
tvb_get_ipv6 function.

                                                              void 
tvb_get_ipv6(tvbuff_t*, gint offset, struct e_in6_addr *addr);
                                                              
proto_tree_add_ipv6_format_value...   I have created a hf_helen_ipv6 routine

                                                              here is 
what I have put together....but would like to use the built in wireshark 
routines:

                         guint32 addr1, addr2, addr3, addr4;

                        if (swap) {

                            addr1 = swap32(addr1);

                            addr2 = swap32(addr2);

                            addr3 = swap32(addr3);

                            addr4 = swap32(addr4);

                        }

                        proto_tree_add_uint_format(helen_sub_tree, 
hf_helen_length, tvb, offset, 16, 0,

                                "Address: 
%d.%d.%d.%d.%d.%d.%d.%d.%d.%d.%d.%d.%d.%d.%d.%d",

                                addr1 >> 24, (addr1 >> 16) & 0xff, 
(addr1 >> 8) & 0xff, addr1 & 0xff,

                                addr2 >> 24, (addr2 >> 16) & 0xff, 
(addr2 >> 8) & 0xff, addr2 & 0xff,

                                addr3 >> 24, (addr3 >> 16) & 0xff, 
(addr3 >> 8) & 0xff, addr3 & 0xff,

                                addr4 >> 24, (addr4 >> 16) & 0xff, 
(addr4 >> 8) & 0xff, addr4 & 0xff

                                );

                        offset += 16;


Any help is greatly appreciated.

Thanks,
Brian



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