/*
* There are only two special setsockopt's for SOL_SOCKET with PF_PACKET:
* SO_ATTACH_FILTER and SO_DETACH_FILTER. All other setsockopt requests
* that are for SOL_SOCKET are passed back to the socket layer for its
* generic implementation.
*
* Both of these setsockopt values are candidates for being handled by the
* socket layer itself in future, however this requires understanding how
* they would interact with all other sockets.
*/
static int
pfp_setsocket_sockopt(sock_lower_handle_t handle, int option_name,
const void *optval, socklen_t optlen)
{
struct bpf_program prog;
struct bpf_insn *fcode;
struct pfpsock *ps;
int error = 0;
int size;
ps = (struct pfpsock *)handle;
switch (option_name) {
case SO_ATTACH_FILTER :
#ifdef _LP64
if (optlen == sizeof (struct bpf_program32)) {
struct bpf_program32 prog32;
bcopy(optval, &prog32, sizeof (prog32));
prog.bf_len = prog32.bf_len;
prog.bf_insns = (void *)(uint64_t)prog32.bf_insns;
} else
#endif
if (optlen == sizeof (struct bpf_program)) {
bcopy(optval, &prog, sizeof (prog));
} else if (optlen != sizeof (struct bpf_program)) {
return (EINVAL);
}
size = prog.bf_len * sizeof (*prog.bf_insns);
fcode = kmem_alloc(size, KM_SLEEP);
if (ddi_copyin(prog.bf_insns, fcode, size, 0) != 0) {
kmem_free(fcode, size);
return (EFAULT);
}
if (bpf_validate(fcode, (int)prog.bf_len)) {
rw_enter(&ps->ps_bpflock, RW_WRITER);
pfp_release_bpf(ps);
ps->ps_bpf.bf_insns = fcode;
ps->ps_bpf.bf_len = size;
rw_exit(&ps->ps_bpflock);
return (0);
}
kmem_free(fcode, size);
error = EINVAL;
break;
case SO_DETACH_FILTER :
pfp_release_bpf(ps);
break;
default :
/*
* If sockfs code receives this error in return from the
* getsockopt downcall it handles the option locally, if
* it can. This implements SO_RCVBUF, etc.
*/
error = ENOPROTOOPT;
break;
}
return (error);
}
/*
* There are only two special setsockopt's for SOL_SOCKET with PF_PACKET:
* SO_ATTACH_FILTER and SO_DETACH_FILTER.
*
* Both of these setsockopt values are candidates for being handled by the
* socket layer itself in future, however this requires understanding how
* they would interact with all other sockets.
*/
static int
pfp_setsocket_sockopt(sock_lower_handle_t handle, int option_name,
const void *optval, socklen_t optlen)
{
struct bpf_program prog;
struct bpf_insn *fcode;
struct pfpsock *ps;
struct sock_proto_props sopp;
int error = 0;
int size;
ps = (struct pfpsock *)handle;
switch (option_name) {
case SO_ATTACH_FILTER :
#ifdef _LP64
if (optlen == sizeof (struct bpf_program32)) {
struct bpf_program32 prog32;
bcopy(optval, &prog32, sizeof (prog32));
prog.bf_len = prog32.bf_len;
prog.bf_insns = (void *)(uint64_t)prog32.bf_insns;
} else
#endif
if (optlen == sizeof (struct bpf_program)) {
bcopy(optval, &prog, sizeof (prog));
} else if (optlen != sizeof (struct bpf_program)) {
return (EINVAL);
}
if (prog.bf_len > BPF_MAXINSNS)
return (EINVAL);
size = prog.bf_len * sizeof (*prog.bf_insns);
fcode = kmem_alloc(size, KM_SLEEP);
if (ddi_copyin(prog.bf_insns, fcode, size, 0) != 0) {
kmem_free(fcode, size);
return (EFAULT);
}
if (bpf_validate(fcode, (int)prog.bf_len)) {
rw_enter(&ps->ps_bpflock, RW_WRITER);
pfp_release_bpf(ps);
ps->ps_bpf.bf_insns = fcode;
ps->ps_bpf.bf_len = size;
rw_exit(&ps->ps_bpflock);
return (0);
}
kmem_free(fcode, size);
error = EINVAL;
break;
case SO_DETACH_FILTER :
pfp_release_bpf(ps);
break;
case SO_RCVBUF :
size = *(int32_t *)optval;
if (size > sockmod_pfp_rcvbuf_max || size < 0)
return (ENOBUFS);
sopp.sopp_flags = SOCKOPT_RCVHIWAT;
sopp.sopp_rxhiwat = size;
ps->ps_upcalls->su_set_proto_props(ps->ps_upper, &sopp);
ps->ps_rcvbuf = size;
break;
default :
error = ENOPROTOOPT;
break;
}
return (error);
}
