Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>
#include <ip.h>
#include "dat.h"
#include "protos.h"

typedef struct{
        uchar   bc[2];
        uchar   fw[2];
        uchar   sc;
        uchar   ccmd;
        uchar   len[2];
}Hdr;

enum{
        Hsize   = 8,
};

enum{
        Ocmd,
};

static Field p_fields[] =
{
        {"cmd",         Fnum,   Ocmd,           "cmd",  },
        {0}
};

static void
p_compile(Filter *f)
{
        if(f->op == '='){
                compile_cmp(aoecmd.name, f, p_fields);
                return;
        }
        sysfatal("unknown aoecmd 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 Ocmd:
                return (h->ccmd & 0xf) == f->ulv;
        }
        return 0;
}

static int
p_seprint(Msg *m)
{
        Hdr *h;

        if(m->pe - m->ps < Hsize)
                return 0;

        h = (Hdr*)m->ps;
        m->ps += Hsize;

        /* no next protocol */
        m->pr = nil;

        m->p = seprint(m->p, m->e, "bc=%d fw=%.4x sc=%d ver=%d ccmd=%d len=%d cfg=",
                NetS(h->bc), NetS(h->fw), h->sc, h->ccmd >> 4, h->ccmd & 0xf,
                NetS(h->len));
        m->p = seprint(m->p, m->e, "%.*s", NetS(h->len), (char*)m->ps);
        return 0;
}

Proto aoecmd =
{
        "aoecmd",
        p_compile,
        p_filter,
        p_seprint,
        nil,
        nil,
        p_fields,
        defaultframer,
};