/*-
* Copyright (c) 2012 Cisco Systems, Inc.
* All rights reserved.
*
* This software was developed by Bjoern Zeeb under contract to
* Cisco Systems, Inc..
*
* 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 AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#include <sys/socket.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
static char *testcase;
static int accepts;
static int debug;
static u_int fib = -1;
static u_int reflectfib = -1;
static uint16_t port = 6666;
static char *addr;
static int nostart;
static int
reflect_conn(int s, char *buf, size_t buflen, ssize_t l, struct sockaddr *sa,
socklen_t salen)
{
ssize_t m;
if (l == -1)
err(EX_OSERR, "read()");
if (l == 0)
errx(EX_NOINPUT, "EOF");
if ((size_t)l > (buflen - 1))
errx(EX_DATAERR, "Input too long");
/* Nuke the \n from echo | netcat. */
buf[l-1] = '\0';
/*
* Match three cases: (1) START, (2) DONE, (3) anything else.
* For anything but START and DONE we just reflect everything.
*/
/*
* We expected a "START testcase" on first connect. Otherwise it means
* that we are out of sync. Exit to not produce weird results.
*/
if (accepts == 0 && nostart == 0) {
if (strncmp(buf, "START ", 6) != 0)
errx(EX_PROTOCOL, "Not received START on first "
"connect: %s", buf);
if (l < 8)
errx(EX_PROTOCOL, "START without test case name: %s",
buf);
if (strcmp(buf+6, testcase) != 0)
errx(EX_PROTOCOL, "START test case does not match "
"'%s': '%s'", testcase, buf+6);
}
/* If debug is on, log. */
if (debug > 0)
fprintf(stderr, "<< %s: %s\n", testcase, buf);
if (reflectfib != (u_int)-1)
l = snprintf(buf, buflen, "FIB %u\n", reflectfib);
/* If debug is on, log. */
if (debug > 0) {
buf[l-1] = '\0';
fprintf(stderr, ">> %s: %s\n", testcase, buf);
}
/* Reflect data with \n again. */
buf[l-1] = '\n';
if (sa != NULL) {
m = sendto(s, buf, l, 0, sa, salen);
} else
m = write(s, buf, l);
/* XXX This is simplified handling. */
if (m == -1 && sa != NULL && errno == EHOSTUNREACH)
warn("ignored expected: sendto(%s, %zd)", buf, l);
else if (m == -1 && (sa == NULL || errno != EHOSTUNREACH))
err(EX_OSERR, "write(%s, %zd)", buf, l);
else if (m != l)
err(EX_OSERR, "short write(%s, %zd) %zd", buf, l, m);
accepts++;
/* See if we got an end signal. */
if (strncmp(buf, "DONE", 4) == 0)
return (-2);
return (0);
}
static int
reflect_tcp6_conn(int as)
{
char buf[1500];
ssize_t l;
int error, s;
s = accept(as, NULL, NULL);
if (s == -1)
err(EX_OSERR, "accept()");
l = read(s, buf, sizeof(buf));
error = reflect_conn(s, buf, sizeof(buf), l, NULL, 0);
close(s);
return (error);
}
static int
reflect_udp6_conn(int s)
{
char buf[1500];
struct sockaddr_in6 from;
socklen_t fromlen;
ssize_t l;
int error;
fromlen = sizeof(from);
l = recvfrom(s, buf, sizeof(buf), 0, (struct sockaddr *)&from,
&fromlen);
#if 0
if (l != -1) {
rc = connect(s, (struct sockaddr *)&from, fromlen);
if (rc == -1) {
if (inet_ntop(PF_INET6, &from, buf, sizeof(buf)) == NULL)
buf[0] = '\0';
err(EX_OSERR, "connect(%d, %s, %u)", s, buf, fromlen);
}
}
#endif
error = reflect_conn(s, buf, sizeof(buf), l, (struct sockaddr *)&from,
fromlen);
#if 0
if (l != -1) {
/* Undo the connect binding again. */
fromlen = sizeof(from);
bzero(&from, fromlen);
from.sin6_len = fromlen;
from.sin6_family = AF_INET6;
from.sin6_port = htons(port); /* This only gives us a ::1:port ::1:port binding */
rc = connect(s, (struct sockaddr *)&from, fromlen);
if (rc == -1) {
if (inet_ntop(PF_INET6, &from.sin6_addr, buf,
sizeof(buf)) == NULL)
buf[0] = '\0';
err(EX_OSERR, "un-connect(%d, %s, %u)", s, buf, fromlen);
}
}
#endif
return (error);
}
static int
reflect_6(int domain, int type)
{
struct sockaddr_in6 sin6;
fd_set rset;
int i, rc, s;
/* Get us a listen socket. */
s = socket(domain, type, 0);
if (s == -1)
err(EX_OSERR, "socket()");
/*
* In case a FIB was given on cmd line, set it. Let the kernel do the
* the bounds check.
*/
if (fib != (u_int)-1) {
rc = setsockopt(s, SOL_SOCKET, SO_SETFIB, &fib, sizeof(fib));
if (rc == -1)
err(EX_OSERR, "setsockopt(SO_SETFIB)");
}
/* Allow re-use. Otherwise restarting for the next test might error. */
i = 1;
rc = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
if (rc == -1)
err(EX_OSERR, "setsockopt(SO_REUSEADDR)");
i = 1;
rc = setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &i, sizeof(i));
if (rc == -1)
err(EX_OSERR, "setsockopt(SO_REUSEPORT)");
/* Bind address and port or just port. */
sin6.sin6_len = sizeof(sin6);
sin6.sin6_family = AF_INET6;
sin6.sin6_port = htons(port);
sin6.sin6_flowinfo = 0;
bzero(&sin6.sin6_addr, sizeof(sin6.sin6_addr));
if (addr != NULL) {
rc = inet_pton(PF_INET6, addr, &sin6.sin6_addr);
if (rc == 0)
errx(EX_USAGE, "inet_pton()");
else if (rc == -1)
err(EX_OSERR, "inet_pton()");
else if (rc != 1)
errx(EX_SOFTWARE, "inet_pton()");
}
sin6.sin6_scope_id = 0;
rc = bind(s, (struct sockaddr *)&sin6, sizeof(sin6));
if (rc == -1)
err(EX_OSERR, "bind(%d)", s);
if (type == SOCK_STREAM) {
rc = listen(s, port);
if (rc == -1)
err(EX_OSERR, "listen(%d, %u)", s, port);
}
/*
* We shall never do more than one connection in parallel so can keep
* it simple.
*/
do {
FD_ZERO(&rset);
FD_SET(s, &rset);
rc = select(s + 1, &rset, NULL, NULL, NULL);
if (rc == -1 && errno != EINTR)
err(EX_OSERR, "select()");
if (rc == 0 || errno == EINTR)
continue;
if (rc != 1)
errx(EX_OSERR, "select() miscounted 1 to %d", rc);
if (!FD_ISSET(s, &rset))
errx(EX_OSERR, "select() did not return our socket");
if (type == SOCK_STREAM)
rc = reflect_tcp6_conn(s);
else if (type == SOCK_DGRAM)
rc = reflect_udp6_conn(s);
else
errx(EX_SOFTWARE, "Unsupported socket type %d", type);
} while (rc == 0);
/* Turn end flagging into no error. */
if (rc == -2)
rc = 0;
/* Close listen socket. */
close(s);
return (rc);
}
static int
reflect_tcp6(void)
{
return (reflect_6(PF_INET6, SOCK_STREAM));
}
static int
reflect_udp6(void)
{
return (reflect_6(PF_INET6, SOCK_DGRAM));
}
int
main(int argc, char *argv[])
{
long long l;
char *dummy, *afname;
int ch, rc;
afname = NULL;
while ((ch = getopt(argc, argv, "A:dF:f:Np:t:T:")) != -1) {
switch (ch) {
case 'A':
addr = optarg;
break;
case 'd':
debug++;
break;
case 'F':
l = strtoll(optarg, &dummy, 10);
if (*dummy != '\0' || l < 0)
errx(EX_USAGE, "Invalid FIB number");
fib = (u_int)l;
break;
case 'f':
l = strtoll(optarg, &dummy, 10);
if (*dummy != '\0' || l < 0)
errx(EX_USAGE, "Invalid FIB number");
reflectfib = (u_int)l;
break;
case 'N':
nostart=1;
break;
case 'p':
l = strtoll(optarg, &dummy, 10);
if (*dummy != '\0' || l < 0)
errx(EX_USAGE, "Invalid port number");
port = (uint16_t)l;
break;
case 't':
testcase = optarg;
break;
case 'T':
afname = optarg;
break;
case '?':
default:
errx(EX_USAGE, "Unknown command line option at '%c'",
optopt);
/* NOTREACHED */
}
}
if (testcase == NULL)
errx(EX_USAGE, "Mandatory option -t <testcase> not given");
if (afname == NULL)
errx(EX_USAGE, "Mandatory option -T <afname> not given");
if (strcmp(afname, "TCP6") == 0)
rc = reflect_tcp6();
else if (strcmp(afname, "UDP6") == 0)
rc = reflect_udp6();
else
errx(EX_USAGE, "Mandatory option -T %s not a valid option",
afname);
return (rc);
}
