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/***********************************************************************/
/* */
/* OCaml */
/* */
/* Xavier Leroy and Pascal Cuoq, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* en Automatique. All rights reserved. This file is distributed */
/* under the terms of the GNU Library General Public License, with */
/* the special exception on linking described in file ../../LICENSE. */
/* */
/***********************************************************************/
#include <errno.h>
#include <caml/mlvalues.h>
#include <caml/memory.h>
#include <caml/alloc.h>
#include <caml/fail.h>
#include "unixsupport.h"
#include "socketaddr.h"
#ifndef IPPROTO_IPV6
#define IPPROTO_IPV6 (-1)
#endif
#ifndef IPV6_V6ONLY
#define IPV6_V6ONLY (-1)
#endif
enum option_type {
TYPE_BOOL = 0,
TYPE_INT = 1,
TYPE_LINGER = 2,
TYPE_TIMEVAL = 3,
TYPE_UNIX_ERROR = 4
};
struct socket_option {
int level;
int option;
};
/* Table of options, indexed by type */
static struct socket_option sockopt_bool[] = {
{ SOL_SOCKET, SO_DEBUG },
{ SOL_SOCKET, SO_BROADCAST },
{ SOL_SOCKET, SO_REUSEADDR },
{ SOL_SOCKET, SO_KEEPALIVE },
{ SOL_SOCKET, SO_DONTROUTE },
{ SOL_SOCKET, SO_OOBINLINE },
{ SOL_SOCKET, SO_ACCEPTCONN },
{ IPPROTO_TCP, TCP_NODELAY },
{ IPPROTO_IPV6, IPV6_V6ONLY}
};
static struct socket_option sockopt_int[] = {
{ SOL_SOCKET, SO_SNDBUF },
{ SOL_SOCKET, SO_RCVBUF },
{ SOL_SOCKET, SO_ERROR },
{ SOL_SOCKET, SO_TYPE },
{ SOL_SOCKET, SO_RCVLOWAT },
{ SOL_SOCKET, SO_SNDLOWAT } };
static struct socket_option sockopt_linger[] = {
{ SOL_SOCKET, SO_LINGER }
};
static struct socket_option sockopt_timeval[] = {
{ SOL_SOCKET, SO_RCVTIMEO },
{ SOL_SOCKET, SO_SNDTIMEO }
};
static struct socket_option sockopt_unix_error[] = {
{ SOL_SOCKET, SO_ERROR }
};
static struct socket_option * sockopt_table[] = {
sockopt_bool,
sockopt_int,
sockopt_linger,
sockopt_timeval,
sockopt_unix_error
};
static char * getsockopt_fun_name[] = {
"getsockopt",
"getsockopt_int",
"getsockopt_optint",
"getsockopt_float",
"getsockopt_error"
};
static char * setsockopt_fun_name[] = {
"setsockopt",
"setsockopt_int",
"setsockopt_optint",
"setsockopt_float",
"setsockopt_error"
};
union option_value {
int i;
struct linger lg;
struct timeval tv;
};
CAMLexport value
unix_getsockopt_aux(char * name,
enum option_type ty, int level, int option,
value socket)
{
union option_value optval;
socklen_param_type optsize;
switch (ty) {
case TYPE_BOOL:
case TYPE_INT:
case TYPE_UNIX_ERROR:
optsize = sizeof(optval.i); break;
case TYPE_LINGER:
optsize = sizeof(optval.lg); break;
case TYPE_TIMEVAL:
optsize = sizeof(optval.tv); break;
default:
unix_error(EINVAL, name, Nothing);
}
if (getsockopt(Socket_val(socket), level, option,
(void *) &optval, &optsize) == -1)
uerror(name, Nothing);
switch (ty) {
case TYPE_BOOL:
case TYPE_INT:
return Val_int(optval.i);
case TYPE_LINGER:
if (optval.lg.l_onoff == 0) {
return Val_int(0); /* None */
} else {
value res = alloc_small(1, 0); /* Some */
Field(res, 0) = Val_int(optval.lg.l_linger);
return res;
}
case TYPE_TIMEVAL:
return copy_double((double) optval.tv.tv_sec
+ (double) optval.tv.tv_usec / 1e6);
case TYPE_UNIX_ERROR:
if (optval.i == 0) {
return Val_int(0); /* None */
} else {
value err, res;
err = unix_error_of_code(optval.i);
Begin_root(err);
res = alloc_small(1, 0); /* Some */
Field(res, 0) = err;
End_roots();
return res;
}
default:
unix_error(EINVAL, name, Nothing);
return Val_unit; /* Avoid warning */
}
}
CAMLexport value
unix_setsockopt_aux(char * name,
enum option_type ty, int level, int option,
value socket, value val)
{
union option_value optval;
socklen_param_type optsize;
double f;
switch (ty) {
case TYPE_BOOL:
case TYPE_INT:
optsize = sizeof(optval.i);
optval.i = Int_val(val);
break;
case TYPE_LINGER:
optsize = sizeof(optval.lg);
optval.lg.l_onoff = Is_block (val);
if (optval.lg.l_onoff)
optval.lg.l_linger = Int_val (Field (val, 0));
break;
case TYPE_TIMEVAL:
f = Double_val(val);
optsize = sizeof(optval.tv);
optval.tv.tv_sec = (int) f;
optval.tv.tv_usec = (int) (1e6 * (f - optval.tv.tv_sec));
break;
case TYPE_UNIX_ERROR:
default:
unix_error(EINVAL, name, Nothing);
}
if (setsockopt(Socket_val(socket), level, option,
(void *) &optval, optsize) == -1)
uerror(name, Nothing);
return Val_unit;
}
CAMLprim value unix_getsockopt(value vty, value vsocket, value voption)
{
enum option_type ty = Int_val(vty);
struct socket_option * opt = &(sockopt_table[ty][Int_val(voption)]);
return unix_getsockopt_aux(getsockopt_fun_name[ty],
ty,
opt->level,
opt->option,
vsocket);
}
CAMLprim value unix_setsockopt(value vty, value vsocket, value voption,
value val)
{
enum option_type ty = Int_val(vty);
struct socket_option * opt = &(sockopt_table[ty][Int_val(voption)]);
return unix_setsockopt_aux(setsockopt_fun_name[ty],
ty,
opt->level,
opt->option,
vsocket,
val);
}
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