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/*
* This file is part of secnet.
* See README for full list of copyright holders.
*
* secnet is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* secnet is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* version 3 along with secnet; if not, see
* https://www.gnu.org/licenses/gpl.html.
*/
#include "secnet.h"
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include <assert.h>
struct rgen_data {
closure_t cl;
struct random_if ops;
struct cloc loc;
int fd;
};
static random_fn random_generate;
static void random_generate(void *data, int32_t bytes, uint8_t *buff)
{
struct rgen_data *st=data;
int r;
r= read(st->fd,buff,bytes);
assert(r == bytes);
/* This is totally crap error checking, but callers of
* this function do not check the return value and dealing
* with failure of this everywhere would be very inconvenient.
*/
}
static list_t *random_apply(closure_t *self, struct cloc loc,
dict_t *context, list_t *args)
{
struct rgen_data *st;
item_t *arg1, *arg2;
string_t filename=NULL;
NEW(st);
st->cl.description="randomsource";
st->cl.type=CL_RANDOMSRC;
st->cl.apply=NULL;
st->cl.interface=&st->ops;
st->ops.st=st;
st->ops.blocking=False;
st->ops.generate=random_generate;
st->loc=loc;
arg1=list_elem(args,0);
arg2=list_elem(args,1);
if (!arg1) {
cfgfatal(loc,"randomsource","requires a filename\n");
}
if (arg1->type != t_string) {
cfgfatal(arg1->loc,"randomsource",
"filename (arg1) must be a string\n");
}
filename=arg1->data.string;
if (arg2) {
if (arg2->type != t_bool) {
cfgfatal(arg2->loc,"randomsource",
"blocking parameter (arg2) must be bool\n");
}
st->ops.blocking=arg2->data.bool_;
}
if (!filename) {
cfgfatal(loc,"randomsource","requires a filename\n");
}
st->fd=open(filename,O_RDONLY);
if (st->fd<0) {
fatal_perror("randomsource (%s:%d): cannot open %s",arg1->loc.file,
arg1->loc.line,filename);
}
return new_closure(&st->cl);
}
void random_module(dict_t *d)
{
add_closure(d,"randomfile",random_apply);
}
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