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ipprint.hh
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ipprint.hh
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#ifndef CLICK_IPPRINT_HH
#define CLICK_IPPRINT_HH
#include <click/element.hh>
CLICK_DECLS
/*
=c
IPPrint([LABEL, I<KEYWORDS>])
=s ip
pretty-prints IP packets
=d
Expects IP packets as input. Should be placed downstream of a
CheckIPHeader or equivalent element.
Prints out IP packets in a human-readable tcpdump-like format, preceded by
the LABEL text.
Keyword arguments are:
=over 8
=item CONTENTS
Determines whether the packet data is printed. It may be `NONE' (do not print
packet data), `HEX' (print packet data in hexadecimal), or `ASCII' (print
packet data in plaintext). Default is `NONE'.
=item PAYLOAD
Like CONTENTS, but prints only the packet payload, rather than the entire
packet. Specify at most one of CONTENTS and PAYLOAD.
=item MAXLENGTH
If CONTENTS or PAYLOAD printing is on, then MAXLENGTH determines the maximum
number of bytes to print. -1 means print the entire packet or payload. Default
is 1500.
=item ID
Boolean. Determines whether to print each packet's IP ID field. Default is
false.
=item TTL
Boolean. Determines whether to print each packet's IP TOS field. Default is
false.
=item TOS
Boolean. Determines whether to print each packet's IP TOS field. Default is
false.
=item LENGTH
Boolean. Determines whether to print each packet's IP length field. Default is
false.
=item TIMESTAMP
Boolean. Determines whether to print each packet's timestamp in seconds since
1970. Default is true.
=item AGGREGATE
Boolean. Determines whether to print each packet's aggregate annotation.
Default is false.
=item PAINT
Boolean. Determines whether to print each packet's paint annotation. Default is false.
=item SWAP
Boolean. Determines whether to print ICMP sequence and ID numbers in
network order. Default is true. The RFC does not require these
two-byte values to be sent in any particular byte order. When Click
was originally designed, Linux/i386 wrote ping sequence numbers in
host byte order (often little endian), but it uses network order now.
=item OUTFILE
String. Only available at user level. PrintV<> information to the file specified
by OUTFILE instead of standard error.
=item ACTIVE
Boolean. If false, then don't print messages. Default is true.
=back
=a Print, CheckIPHeader */
class IPPrint : public Element { public:
IPPrint() CLICK_COLD;
~IPPrint() CLICK_COLD;
const char *class_name() const { return "IPPrint"; }
const char *port_count() const { return PORTS_1_1; }
int configure(Vector<String> &, ErrorHandler *) CLICK_COLD;
int initialize(ErrorHandler *) CLICK_COLD;
void cleanup(CleanupStage) CLICK_COLD;
void add_handlers() CLICK_COLD;
Packet *simple_action(Packet *);
private:
bool _swap;
bool _active;
String _label;
int _bytes; // Number of bytes to dump
bool _print_id : 1; // Print IP ID?
bool _print_timestamp : 1;
bool _print_paint : 1;
bool _print_tos : 1;
bool _print_ttl : 1;
bool _print_len : 1;
bool _print_aggregate : 1;
bool _payload : 1; // '_contents' refers to payload
unsigned _contents : 2; // Whether to dump packet contents
int _print_every;
int _count_every;
#if CLICK_USERLEVEL
String _outfilename;
FILE *_outfile;
#endif
ErrorHandler *_errh;
static StringAccum &address_pair(StringAccum &sa, const click_ip *iph);
void tcp_line(StringAccum &, const Packet *, int transport_len) const;
void udp_line(StringAccum &, const Packet *, int transport_len) const;
void icmp_line(StringAccum &, const Packet *, int transport_len) const;
};
CLICK_ENDDECLS
#endif

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