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/*
* tcpwrap.c
* Copyright (C) 2000 Shugo Maeda <shugo@ruby-lang.org>
*
* This file is part of ruby-tcpwrap.
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA
*/
#include "ruby.h"
#include "rubyio.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <tcpd.h>
#ifdef HAVE_IDENT_H
#include <ident.h>
#endif
#define DEFAULT_RFC1413_QUERY_TIMEOUT 30
int allow_severity = 0;
int deny_severity = 0;
static VALUE cTCPServer;
static VALUE eSocket;
static VALUE cTCPWrapper;
typedef struct tcp_wrapper {
VALUE daemon;
VALUE server;
int ident_lookup;
int ident_timeout;
} tcp_wrapper_t;
static void mark_tcpd(tcp_wrapper_t *tcpd)
{
rb_gc_mark(tcpd->daemon);
rb_gc_mark(tcpd->server);
}
static void free_tcpd(tcp_wrapper_t *tcpd)
{
free(tcpd);
}
static VALUE tcpd_s_new(int argc, VALUE *argv, VALUE self)
{
VALUE obj, daemon, server, ident_lookup, ident_timeout;
int to;
tcp_wrapper_t *tcpd;
rb_scan_args(argc, argv, "22", &daemon, &server, &ident_lookup, &ident_timeout);
if (argc == 4) {
to = NUM2INT(ident_timeout);
}
else {
to = DEFAULT_RFC1413_QUERY_TIMEOUT;
}
Check_Type(daemon, T_STRING);
if (!rb_obj_is_kind_of(server, cTCPServer))
rb_raise(rb_eTypeError, "expecting TCPServer");
obj = Data_Make_Struct(cTCPWrapper, tcp_wrapper_t, mark_tcpd, free_tcpd, tcpd);
tcpd->daemon = daemon;
tcpd->server = server;
tcpd->ident_lookup = RTEST(ident_lookup);
tcpd->ident_timeout = to;
return obj;
}
static VALUE tcpd_accept(VALUE self)
{
int access = 0;
tcp_wrapper_t *tcpd;
VALUE sock;
int sockfd;
OpenFile *fptr;
struct sockaddr_in addr;
struct hostent *h;
char *client_name = NULL;
char *client_addr = NULL;
char *client_user = NULL;
int len = sizeof(addr);
Data_Get_Struct(self, tcp_wrapper_t, tcpd);
again:
sock = rb_funcall(tcpd->server, rb_intern("accept"), 0);
GetOpenFile(sock, fptr);
sockfd = fileno(fptr->f);
if (getpeername(sockfd, (struct sockaddr*) &addr, &len) < 0)
rb_sys_fail("getpeername(2)");
client_addr = inet_ntoa(addr.sin_addr);
h = gethostbyaddr((char *)&addr.sin_addr,
sizeof(addr.sin_addr),
addr.sin_family);
if (h == NULL) {
#ifdef HAVE_HSTERROR
extern int h_errno;
rb_raise(eSocket, "%s", (char *) hsterror(h_errno));
#else
rb_raise(eSocket, "host not found");
#endif
}
client_name = h->h_name;
#ifdef HAVE_IDENT_ID
if (tcpd->ident_lookup)
client_user = ident_id(sockfd, tcpd->ident_timeout);
#endif
if (!hosts_ctl(RSTRING(tcpd->daemon)->ptr,
(client_name == NULL) ? STRING_UNKNOWN : client_name,
(client_addr == NULL) ? STRING_UNKNOWN : client_addr,
(client_user == NULL) ? STRING_UNKNOWN : client_user)) {
rb_funcall(sock, rb_intern("shutdown"), 0);
rb_funcall(sock, rb_intern("close"), 0);
#ifdef HAVE_IDENT_ID
if (client_user)
free(client_user);
#endif
goto again;
}
#ifdef HAVE_IDENT_ID
if (client_user)
free(client_user);
#endif
return sock;
}
void Init_tcpwrap()
{
rb_require("socket");
cTCPServer = rb_const_get(rb_cObject, rb_intern("TCPServer"));
eSocket = rb_const_get(rb_cObject, rb_intern("SocketError"));
cTCPWrapper = rb_define_class("TCPWrapper", rb_cObject);
rb_define_singleton_method(cTCPWrapper, "new", tcpd_s_new, -1);
rb_define_method(cTCPWrapper, "accept", tcpd_accept, 0);
}
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