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/* $NetBSD: srvtest.c,v 1.10 2015/05/30 22:40:38 christos Exp $ */
/*-
* Copyright (c) 2015 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/cdefs.h>
__RCSID("$NetBSD: srvtest.c,v 1.10 2015/05/30 22:40:38 christos Exp $");
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <stdio.h>
#include <signal.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <stdlib.h>
#include <poll.h>
#include <err.h>
#include "blacklist.h"
#ifdef BLDEBUG
#include "bl.h"
static void *b;
#endif
#ifndef INFTIM
#define INFTIM -1
#endif
static void
process_tcp(int afd)
{
ssize_t n;
char buffer[256];
memset(buffer, 0, sizeof(buffer));
if ((n = read(afd, buffer, sizeof(buffer))) == -1)
err(1, "read");
buffer[sizeof(buffer) - 1] = '\0';
printf("%s: sending %d %s\n", getprogname(), afd, buffer);
#ifdef BLDEBUG
blacklist_r(b, 1, afd, buffer);
#else
blacklist(1, afd, buffer);
#endif
exit(0);
}
static void
process_udp(int afd)
{
ssize_t n;
char buffer[256];
struct sockaddr_storage ss;
socklen_t slen;
memset(buffer, 0, sizeof(buffer));
slen = (socklen_t)sizeof(ss);
memset(&ss, 0, sizeof(ss));
if ((n = recvfrom(afd, buffer, sizeof(buffer), 0, (void *)&ss,
&slen)) == -1)
err(1, "recvfrom");
buffer[sizeof(buffer) - 1] = '\0';
printf("%s: sending %d %s\n", getprogname(), afd, buffer);
blacklist_sa(1, afd, (void *)&ss, slen, buffer);
exit(0);
}
static int
cr(int af, int type, in_port_t p)
{
int sfd;
struct sockaddr_storage ss;
socklen_t slen;
sfd = socket(af == AF_INET ? PF_INET : PF_INET6, type, 0);
if (sfd == -1)
err(1, "socket");
p = htons(p);
memset(&ss, 0, sizeof(ss));
if (af == AF_INET) {
struct sockaddr_in *s = (void *)&ss;
s->sin_family = AF_INET;
slen = sizeof(*s);
s->sin_port = p;
} else {
struct sockaddr_in6 *s6 = (void *)&ss;
s6->sin6_family = AF_INET6;
slen = sizeof(*s6);
s6->sin6_port = p;
}
#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
ss.ss_len = (uint8_t)slen;
#endif
if (bind(sfd, (const void *)&ss, slen) == -1)
err(1, "bind");
if (type != SOCK_DGRAM)
if (listen(sfd, 5) == -1)
err(1, "listen");
return sfd;
}
static void
handle(int type, int sfd)
{
struct sockaddr_storage ss;
socklen_t alen = sizeof(ss);
int afd;
if (type != SOCK_DGRAM) {
if ((afd = accept(sfd, (void *)&ss, &alen)) == -1)
err(1, "accept");
} else
afd = sfd;
/* Create child process */
switch (fork()) {
case -1:
err(1, "fork");
case 0:
if (type == SOCK_DGRAM)
process_udp(afd);
else
process_tcp(afd);
break;
default:
close(afd);
break;
}
}
static __dead void
usage(int c)
{
warnx("Unknown option `%c'", (char)c);
fprintf(stderr, "Usage: %s [-u] [-p <num>]\n", getprogname());
exit(EXIT_FAILURE);
}
int
main(int argc, char *argv[])
{
#ifdef __linux__
#define NUMFD 1
#else
#define NUMFD 2
#endif
struct pollfd pfd[NUMFD];
int type = SOCK_STREAM, c;
in_port_t port = 6161;
signal(SIGCHLD, SIG_IGN);
#ifdef BLDEBUG
b = bl_create(false, "blsock", vsyslog);
#endif
while ((c = getopt(argc, argv, "up:")) != -1)
switch (c) {
case 'u':
type = SOCK_DGRAM;
break;
case 'p':
port = (in_port_t)atoi(optarg);
break;
default:
usage(c);
}
pfd[0].fd = cr(AF_INET, type, port);
pfd[0].events = POLLIN;
#if NUMFD > 1
pfd[1].fd = cr(AF_INET6, type, port);
pfd[1].events = POLLIN;
#endif
for (;;) {
if (poll(pfd, __arraycount(pfd), INFTIM) == -1)
err(1, "poll");
for (size_t i = 0; i < __arraycount(pfd); i++) {
if ((pfd[i].revents & POLLIN) == 0)
continue;
handle(type, pfd[i].fd);
}
}
}
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