Wireshark · Wireshark-dev: Re: [Wireshark-dev] roofnet v1

[Sebastien Tandel <sebastien@xxxxxxxxx>]

Hi,

   Can you send a pcap file for testing purpose, please?


Regards,

Sebastien Tandel

Nicola Arnoldi wrote:
> Hi everybody.
> The great work Sebastien did about Roofnet dissectors was related to
> Version 2, which is still far from stable.
> It should be implemented the V 1 as well, which has some differences
> between V2.
> I attach the c++ header, hoping it would be sufficient for you to modify
> the dissector accordingly.
>
> Note that ETHTYPES, which in V2 all started with a 6 (6xx) now start
> with number 9. (9xx)
>
> The message I receive when I try to decode V1 datagrams with the old
> dissector is something like.
> Bogus IP header, more payload than told by roofnet...and others.
>
> Bye.
>
> Nicola
>   
> ------------------------------------------------------------------------
>
> #ifndef CLICK_SRPAKCET_HH
> #define CLICK_SRPAKCET_HH
> #include <click/ipaddress.hh>
> #include <elements/wifi/path.hh>
> CLICK_DECLS
>
> #define max(a, b) ((a) > (b) ? (a) : (b))
> #define min(a, b) ((a) < (b) ? (a) : (b))
>
>
> enum SRCRPacketType { PT_QUERY = 0x01,
> 		      PT_REPLY = 0x02,
>                       PT_TOP5_RESULT = 0x03,
> 		      PT_DATA  = 0x04,
>                       PT_GATEWAY = 0x08
> };
>
>
>
> enum SRCRPacketFlags {
>   FLAG_ERROR = (1<<0),
>   FLAG_UPDATE = (1<<1),
>   FLAG_TOP5_REQUEST_RESULT = (1<<2),
>   FLAG_TOP5_BEST_ROUTE = (1<<3),
>   FLAG_SCHEDULE = (1<<4),
>   FLAG_SCHEDULE_TOKEN = (1<<5),
>   FLAG_SCHEDULE_FAKE = (1<<6),
>   FLAG_ECN = (1<<7)
> };
>
> static const uint8_t _sr_version = 0x0b;
>
>
> // Packet format.
> CLICK_SIZE_PACKED_STRUCTURE(
> struct srpacket {,
>   uint8_t _version; /* see _srcr_version */
>   uint8_t _type;  /* see enum SRCRPacketType */
>   uint8_t _nlinks;
>   uint8_t _next;   // Index of next node who should process this packet.
>
>
>   uint16_t _ttl;
>   uint16_t _cksum;
>   uint16_t _flags; 
>   uint16_t _dlen;
>
>   /* PT_QUERY
>    * _qdst is used for the query destination in control packets
>    * and a extra 32 bit seq number in data packets
>    */
>   uint32_t _qdst;
>
>
>   uint32_t _seq;   // seq number
>   uint32_t _seq2;  // another seq number
>
>   
>   /* uin32_t ip[_nlinks] */
>   /* uin32_t metrics[_nlinks] */
>
>
>   /* ip */
>   /* fwd */
>   /* rev */
>   /* seq */
>   /* ip */
>
>   uint32_t _random_from;
>   uint32_t _random_fwd_metric;
>   uint32_t _random_rev_metric;
>   uint32_t _random_seq;
>   uint16_t _random_age;
>   uint32_t _random_to;
>
>
>   void set_random_from(IPAddress ip) {
>     _random_from = ip;
>   }
>   void set_random_to(IPAddress ip) {
>     _random_to = ip;
>   }
>   void set_random_fwd_metric(uint32_t m) {
>     _random_fwd_metric = m;
>   }
>
>   void set_random_rev_metric(uint32_t m) {
>     _random_rev_metric = m;
>   }
>   void set_random_seq(uint32_t s) {
>     _random_seq = s;
>   }
>   void set_random_age(uint32_t s) {
>     _random_age = s;
>   }
>
>   IPAddress get_random_from() {
>     return _random_from;
>   }
>   IPAddress get_random_to() {
>     return _random_to;
>   }
>   uint32_t get_random_fwd_metric() {
>     return _random_fwd_metric;
>   }
>   uint32_t get_random_rev_metric() {
>     return _random_rev_metric;
>   }
>
>   uint32_t get_random_seq() {
>     return _random_seq;
>   }
>
>   uint32_t get_random_age() {
>     return _random_age;
>   }
>
>
>   void set_link(int link,
> 		IPAddress a, IPAddress b, 
> 		uint32_t fwd, uint32_t rev,
> 		uint32_t seq,
> 		uint32_t age) {
>     
>     uint32_t *ndx = (uint32_t *) (this+1);
>     ndx += link * 5;
>
>     ndx[0] = a;
>     ndx[1] = fwd;
>     ndx[2] = rev;
>     ndx[3] = seq;
>     ndx[4] = age;
>     ndx[5] = b;
>   }
>
>   uint32_t get_link_fwd(int link) {
>     uint32_t *ndx = (uint32_t *) (this+1);
>     ndx += link * 5;
>     return ndx[1];
>   }
>   uint32_t get_link_rev(int link) {
>     uint32_t *ndx = (uint32_t *) (this+1);
>     ndx += link * 5;
>     return ndx[2];
>   }
>
>   uint32_t get_link_seq(int link) {
>     uint32_t *ndx = (uint32_t *) (this+1);
>     ndx += link * 5;
>     return ndx[3];
>   }
>
>   uint32_t get_link_age(int link) {
>     uint32_t *ndx = (uint32_t *) (this+1);
>     ndx += link * 5;
>     return ndx[4];
>   }
>
>   IPAddress get_link_node(int link) {
>     uint32_t *ndx = (uint32_t *) (this+1);
>     ndx += link * 5;
>     return ndx[0];
>   }
>
>
>   void set_link_node(int link, IPAddress ip) {
>     uint32_t *ndx = (uint32_t *) (this+1);
>     ndx += link * 5;
>     ndx[0] = ip;
>   }
>
>
>
>
>   // How long should the packet be?
>   size_t hlen_wo_data() const { return len_wo_data(_nlinks); }
>   size_t hlen_with_data() const { return len_with_data(_nlinks, ntohs(_dlen)); }
>   
>   static size_t len_wo_data(int nlinks) {
>     return sizeof(struct srpacket) +
>       sizeof(uint32_t) + 
>       (nlinks) * sizeof(uint32_t) * 5;
>
>   }
>   static size_t len_with_data(int nlinks, int dlen) {
>     return len_wo_data(nlinks) + dlen;
>   }
>   
>   int num_links() {
>     return _nlinks;
>   }
>
>   int next() {
>     return _next;
>   }
>   Path get_path() {
>     Path p;
>     for (int x = 0; x <= num_links(); x++) {
>       p.push_back(get_link_node(x));
>     }
>     return p;
>   }
>   void set_data_seq(uint32_t n) {
>     _qdst = htonl(n);
>   }
>   uint32_t data_seq() {
>     return ntohl(_qdst);
>   }
>   void set_seq(uint32_t n) {
>     _seq = htonl(n);
>   }
>   uint32_t seq() {
>     return ntohl(_seq);
>   }
>
>   void set_seq2(uint32_t n) {
>     _seq2 = htonl(n);
>   }
>   uint32_t seq2() {
>     return ntohl(_seq2);
>   }
>   void set_next(uint8_t n) {
>     _next = n;
>   }
>
>   void set_num_links(uint8_t n) {
>     _nlinks = n;
>   }
>   void set_data_len(uint16_t len) {
>     _dlen = htons(len);
>   }
>   uint16_t data_len() {
>     return ntohs(_dlen);
>   }
>
>
>   void set_flag(uint16_t f) {
>     uint16_t flags = ntohs(_flags);
>     _flags = htons(flags | f);
>   }
>   
>   bool flag(int f) {
>     int x = ntohs(_flags);
>     return x & f;
>   }
>   void unset_flag(uint16_t f) {
>     uint16_t flags = ntohs(_flags);
>     _flags = htons(flags & !f);
>   }
>
>
>   /* remember that if you call this you must have set the number of links in this packet! */
>   u_char *data() { return (((u_char *)this) + len_wo_data(num_links())); }
>
>
>   void set_checksum() {
>     unsigned int tlen = 0;
>     if (_type & PT_DATA) {
>       tlen = hlen_with_data();
>     } else {
>       tlen = hlen_wo_data();
>     }
>     _cksum = 0;
>     _cksum = click_in_cksum((unsigned char *) this, tlen);
>   }
> });
>
>
>
>
> #ifndef sr_assert
> #define sr_assert(e) ((e) ? (void) 0 : sr_assert_(__FILE__, __LINE__, #e))
> #endif /* sr_assert */
>
>
> inline void 
> sr_assert_(const char *file, int line, const char *expr)
> {
>   click_chatter("assertion \"%s\" FAILED: file %s, line %d",
> 		expr, file, line);
>
> #ifdef CLICK_USERLEVEL  
>   abort();
> #endif
>
> }
>
>
> CLICK_ENDDECLS
> #endif /* CLICK_SRPACKET_HH */
>   
> ------------------------------------------------------------------------
>
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