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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 Lesser General Public License version 2.1, with the */
/* special exception on linking described in the file LICENSE. */
/* */
/**************************************************************************/
#include <errno.h>
#include <caml/mlvalues.h>
#include <caml/memory.h>
#include <caml/alloc.h>
#include <caml/fail.h>
#include "caml/unixsupport.h"
#include "caml/socketaddr.h"
#ifndef SO_REUSEPORT
#define SO_REUSEPORT (-1)
#endif
#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 const 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},
{ SOL_SOCKET, SO_REUSEPORT }
};
static const 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 const struct socket_option sockopt_linger[] = {
{ SOL_SOCKET, SO_LINGER }
};
static const struct socket_option sockopt_timeval[] = {
{ SOL_SOCKET, SO_RCVTIMEO },
{ SOL_SOCKET, SO_SNDTIMEO }
};
static const struct socket_option sockopt_unix_error[] = {
{ SOL_SOCKET, SO_ERROR }
};
static const struct socket_option * sockopt_table[] = {
sockopt_bool,
sockopt_int,
sockopt_linger,
sockopt_timeval,
sockopt_unix_error
};
static const char * getsockopt_fun_name[] = {
"getsockopt",
"getsockopt_int",
"getsockopt_optint",
"getsockopt_float",
"getsockopt_error"
};
static const 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 caml_unix_getsockopt_aux(const char * name,
enum option_type ty, int level, int option,
value socket)
{
CAMLparam0();
CAMLlocal1(err);
union option_value optval;
socklen_param_type optsize;
value res;
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:
caml_unix_error(EINVAL, name, Nothing);
}
if (getsockopt(Socket_val(socket), level, option,
(void *) &optval, &optsize) == -1) {
caml_win32_maperr(WSAGetLastError());
caml_uerror(name, Nothing);
}
switch (ty) {
case TYPE_BOOL:
case TYPE_INT:
res = Val_int(optval.i); break;
case TYPE_LINGER:
if (optval.lg.l_onoff == 0) {
res = Val_none;
} else {
res = caml_alloc_some(Val_int(optval.lg.l_linger));
}
break;
case TYPE_TIMEVAL:
res = caml_copy_double((double) optval.tv.tv_sec
+ (double) optval.tv.tv_usec / 1e6);
break;
case TYPE_UNIX_ERROR:
if (optval.i == 0) {
res = Val_none;
} else {
err = caml_unix_error_of_code(optval.i);
res = caml_alloc_some(err);
}
break;
default:
caml_unix_error(EINVAL, name, Nothing);
}
CAMLreturn(res);
}
CAMLexport value caml_unix_setsockopt_aux(const 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_some(val);
if (optval.lg.l_onoff)
optval.lg.l_linger = Int_val(Some_val(val));
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:
caml_unix_error(EINVAL, name, Nothing);
}
if (setsockopt(Socket_val(socket), level, option,
(void *) &optval, optsize) == -1) {
caml_win32_maperr(WSAGetLastError());
caml_uerror(name, Nothing);
}
return Val_unit;
}
CAMLprim value caml_unix_getsockopt(value vty, value vsocket, value voption)
{
enum option_type ty = Int_val(vty);
const struct socket_option * opt = &(sockopt_table[ty][Int_val(voption)]);
return caml_unix_getsockopt_aux(getsockopt_fun_name[ty],
ty,
opt->level,
opt->option,
vsocket);
}
CAMLprim value caml_unix_setsockopt(value vty, value vsocket, value voption,
value val)
{
enum option_type ty = Int_val(vty);
const struct socket_option * opt = &(sockopt_table[ty][Int_val(voption)]);
return caml_unix_setsockopt_aux(setsockopt_fun_name[ty],
ty,
opt->level,
opt->option,
vsocket,
val);
}
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