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#include <u.h>
#include <libc.h>
#include <ip.h>
#include "dat.h"
#include "protos.h"
typedef struct{
uchar type;
uchar conn;
uchar seq;
uchar len;
}Hdr;
enum{
Hsize = 4,
};
enum{
Otype,
Oconn,
Oseq,
Olen,
};
static Field p_fields[] =
{
{"type", Fnum, Otype, "type", },
{"conn", Fnum, Oconn, "conn", },
{"seq", Fnum, Oseq, "seq", },
{"len", Fnum, Olen, "len", },
{0}
};
static void
p_compile(Filter *f)
{
if(f->op == '='){
compile_cmp(aoe.name, f, p_fields);
return;
}
sysfatal("unknown aoe field: %s", f->s);
}
static int
p_filter(Filter *f, Msg *m)
{
Hdr *h;
if(m->pe - m->ps < Hsize)
return 0;
h = (Hdr*)m->ps;
m->ps += Hsize;
switch(f->subop){
case Otype:
return h->type == f->ulv;
case Oconn:
return h->conn = f->ulv;
case Oseq:
return h->seq = f->ulv;
case Olen:
return h->len = f->ulv;
}
return 0;
}
static char* ttab[] = {
"Tinita",
"Tinitb",
"Tinitc",
"Tdata",
"Tack",
"Tdiscover",
"Toffer",
"Treset",
};
static int
p_seprint(Msg *m)
{
char *s, *p, buf[4];
Hdr *h;
if(m->pe - m->ps < Hsize)
return 0;
h = (Hdr*)m->ps;
m->ps += Hsize;
m->pr = nil;
if(h->type < nelem(ttab))
s = ttab[h->type];
else{
snprint(buf, sizeof buf, "%d", h->type);
s = buf;
}
p = (char*)m->ps;
m->p = seprint(m->p, m->e, "type=%s conn=%d seq=%d len=%d %.*s",
s, h->conn, h->seq, h->len,
(int)utfnlen(p, h->len), p);
return 0;
}
Proto cec =
{
"cec",
p_compile,
p_filter,
p_seprint,
nil,
nil,
p_fields,
defaultframer,
};
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