Subversion Repositories planix.SVN

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

typedef struct{
        uchar   verflags;
        uchar   error;
        uchar   major[2];
        uchar   minor;
        uchar   cmd;
        uchar   tag[4];
}Hdr;

enum{
        Hsize   = 10,
};

enum{
        Omajor,
        Ominor,
        Ocmd,
};

static Mux p_mux[] = {
        {"aoeata",      0},
        {"aoecmd",      1},
        {"aoemask",     2},
        {"aoerr",       3},
        {0},
};

static Field p_fields[] =
{
        {"shelf",       Fnum,   Ominor,         "shelf", },
        {"slot",        Fnum,   Omajor,         "slot", },
        {"cmd",         Fnum,   Ocmd,           "cmd",  },
        {0}
};

static void
p_compile(Filter *f)
{
        Mux *m;

        if(f->op == '='){
                compile_cmp(aoe.name, f, p_fields);
                return;
        }
        for(m = p_mux; m->name; m++)
                if(strcmp(f->s, m->name) == 0){
                        f->pr = m->pr;
                        f->ulv = m->val;
                        f->subop = Ocmd;
                        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 Omajor:
                return NetS(h->major) == f->ulv;
        case Ominor:
                return h->minor == f->ulv;
        case Ocmd:
                return h->cmd == 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;

        demux(p_mux, h->cmd, h->cmd, m, &dump);

        m->p = seprint(m->p, m->e, "ver=%d flag=%4b err=%d %d.%d cmd=%ux tag=%ux",
                h->verflags >> 4, h->verflags & 0xf, h->error, NetS(h->major),
                h->minor, h->cmd, NetL(h->tag));
        return 0;
}

Proto aoe =
{
        "aoe",
        p_compile,
        p_filter,
        p_seprint,
        p_mux,
        "%lud",
        p_fields,
        defaultframer,
};