/*
* iperf, Copyright (c) 2014-2019, The Regents of the University of
* California, through Lawrence Berkeley National Laboratory (subject
* to receipt of any required approvals from the U.S. Dept. of
* Energy). All rights reserved.
*
* If you have questions about your rights to use or distribute this
* software, please contact Berkeley Lab's Technology Transfer
* Department at TTD@lbl.gov.
*
* NOTICE. This software is owned by the U.S. Department of Energy.
* As such, the U.S. Government has been granted for itself and others
* acting on its behalf a paid-up, nonexclusive, irrevocable,
* worldwide license in the Software to reproduce, prepare derivative
* works, and perform publicly and display publicly. Beginning five
* (5) years after the date permission to assert copyright is obtained
* from the U.S. Department of Energy, and subject to any subsequent
* five (5) year renewals, the U.S. Government is granted for itself
* and others acting on its behalf a paid-up, nonexclusive,
* irrevocable, worldwide license in the Software to reproduce,
* prepare derivative works, distribute copies to the public, perform
* publicly and display publicly, and to permit others to do so.
*
* This code is distributed under a BSD style license, see the LICENSE
* file for complete information.
*/
#include "iperf_config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netdb.h>
#include <sys/time.h>
#include <sys/select.h>
#include <limits.h>
#ifdef HAVE_NETINET_SCTP_H
#include <netinet/sctp.h>
#endif /* HAVE_NETINET_SCTP_H */
#include "iperf.h"
#include "iperf_api.h"
#include "iperf_sctp.h"
#include "net.h"
/* iperf_sctp_recv
*
* receives the data for SCTP
*/
int
iperf_sctp_recv(struct iperf_stream *sp)
{
#if defined(HAVE_SCTP_H)
int r;
r = Nread(sp->socket, sp->buffer, sp->settings->blksize, Psctp);
if (r < 0)
return r;
/* Only count bytes received while we're in the correct state. */
if (sp->test->state == TEST_RUNNING) {
sp->result->bytes_received += r;
sp->result->bytes_received_this_interval += r;
}
else {
if (sp->test->debug)
printf("Late receive, state = %d\n", sp->test->state);
}
return r;
#else
i_errno = IENOSCTP;
return -1;
#endif /* HAVE_SCTP_H */
}
/* iperf_sctp_send
*
* sends the data for SCTP
*/
int
iperf_sctp_send(struct iperf_stream *sp)
{
#if defined(HAVE_SCTP_H)
int r;
r = Nwrite(sp->socket, sp->buffer, sp->settings->blksize, Psctp);
if (r < 0)
return r;
sp->result->bytes_sent += r;
sp->result->bytes_sent_this_interval += r;
return r;
#else
i_errno = IENOSCTP;
return -1;
#endif /* HAVE_SCTP_H */
}
/* iperf_sctp_accept
*
* accept a new SCTP stream connection
*/
int
iperf_sctp_accept(struct iperf_test * test)
{
#if defined(HAVE_SCTP_H)
int s;
signed char rbuf = ACCESS_DENIED;
char cookie[COOKIE_SIZE];
socklen_t len;
struct sockaddr_storage addr;
len = sizeof(addr);
s = accept(test->listener, (struct sockaddr *) &addr, &len);
if (s < 0) {
i_errno = IESTREAMCONNECT;
return -1;
}
if (Nread(s, cookie, COOKIE_SIZE, Psctp) < 0) {
i_errno = IERECVCOOKIE;
close(s);
return -1;
}
if (strncmp(test->cookie, cookie, COOKIE_SIZE) != 0) {
if (Nwrite(s, (char*) &rbuf, sizeof(rbuf), Psctp) < 0) {
i_errno = IESENDMESSAGE;
close(s);
return -1;
}
close(s);
}
return s;
#else
i_errno = IENOSCTP;
return -1;
#endif /* HAVE_SCTP_H */
}
/* iperf_sctp_listen
*
* start up a listener for SCTP stream connections
*/
int
iperf_sctp_listen(struct iperf_test *test)
{
#if defined(HAVE_SCTP_H)
struct addrinfo hints, *res;
char portstr[6];
int s, opt, saved_errno;
close(test->listener);
test->listener = -1;
snprintf(portstr, 6, "%d", test->server_port);
memset(&hints, 0, sizeof(hints));
/*
* If binding to the wildcard address with no explicit address
* family specified, then force us to get an AF_INET6 socket.
* More details in the comments in netanounce().
*/
if (test->settings->domain == AF_UNSPEC && !test->bind_address) {
hints.ai_family = AF_INET6;
} else {
hints.ai_family = test->settings->domain;
}
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
if ((gerror = getaddrinfo(test->bind_address, portstr, &hints, &res)) != 0) {
i_errno = IESTREAMLISTEN;
return -1;
}
if ((s = socket(res->ai_family, SOCK_STREAM, IPPROTO_SCTP)) < 0) {
freeaddrinfo(res);
i_errno = IESTREAMLISTEN;
return -1;
}
if ((opt = test->settings->socket_bufsize)) {
int saved_errno;
if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &opt, sizeof(opt)) < 0) {
saved_errno = errno;
close(s);
freeaddrinfo(res);
errno = saved_errno;
i_errno = IESETBUF;
return -1;
}
if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &opt, sizeof(opt)) < 0) {
saved_errno = errno;
close(s);
freeaddrinfo(res);
errno = saved_errno;
i_errno = IESETBUF;
return -1;
}
}
if (test->bind_dev) {
#if defined(SO_BINDTODEVICE)
if (setsockopt(s, SOL_SOCKET, SO_BINDTODEVICE,
test->bind_dev, IFNAMSIZ) < 0)
#endif // SO_BINDTODEVICE
{
saved_errno = errno;
close(s);
freeaddrinfo(res);
i_errno = IEBINDDEV;
errno = saved_errno;
return -1;
}
}
#if defined(IPV6_V6ONLY) && !defined(__OpenBSD__)
if (res->ai_family == AF_INET6 && (test->settings->domain == AF_UNSPEC ||
test->settings->domain == AF_INET6)) {
if (test->settings->domain == AF_UNSPEC)
opt = 0;
else
opt = 1;
if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY,
(char *) &opt, sizeof(opt)) < 0) {
saved_errno = errno;
close(s);
freeaddrinfo(res);
errno = saved_errno;
i_errno = IEPROTOCOL;
return -1;
}
}
#endif /* IPV6_V6ONLY */
opt = 1;
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
saved_errno = errno;
close(s);
freeaddrinfo(res);
errno = saved_errno;
i_errno = IEREUSEADDR;
return -1;
}
/* servers must call sctp_bindx() _instead_ of bind() */
if (!TAILQ_EMPTY(&test->xbind_addrs)) {
if (iperf_sctp_bindx(test, s, IPERF_SCTP_SERVER)) {
close(s);
freeaddrinfo(res);
return -1;
}
} else
if (bind(s, (struct sockaddr *) res->ai_addr, res->ai_addrlen) < 0) {
saved_errno = errno;
close(s);
freeaddrinfo(res);
errno = saved_errno;
i_errno = IESTREAMLISTEN;
return -1;
}
freeaddrinfo(res);
if (listen(s, INT_MAX) < 0) {
i_errno = IESTREAMLISTEN;
return -1;
}
test->listener = s;
return s;
#else
i_errno = IENOSCTP;
return -1;
#endif /* HAVE_SCTP_H */
}
/* iperf_sctp_connect
*
* connect to a SCTP stream listener
*/
int
iperf_sctp_connect(struct iperf_test *test)
{
#if defined(HAVE_SCTP_H)
int s, opt, saved_errno;
char portstr[6];
struct addrinfo hints, *local_res = NULL, *server_res = NULL;
if (test->bind_address) {
memset(&hints, 0, sizeof(hints));
hints.ai_family = test->settings->domain;
hints.ai_socktype = SOCK_STREAM;
if ((gerror = getaddrinfo(test->bind_address, NULL, &hints, &local_res)) != 0) {
i_errno = IESTREAMCONNECT;
return -1;
}
}
memset(&hints, 0, sizeof(hints));
hints.ai_family = test->settings->domain;
hints.ai_socktype = SOCK_STREAM;
snprintf(portstr, sizeof(portstr), "%d", test->server_port);
if ((gerror = getaddrinfo(test->server_hostname, portstr, &hints, &server_res)) != 0) {
if (test->bind_address)
freeaddrinfo(local_res);
i_errno = IESTREAMCONNECT;
return -1;
}
s = socket(server_res->ai_family, SOCK_STREAM, IPPROTO_SCTP);
if (s < 0) {
freeaddrinfo(local_res);
freeaddrinfo(server_res);
i_errno = IESTREAMCONNECT;
return -1;
}
if ((opt = test->settings->socket_bufsize)) {
int saved_errno;
if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &opt, sizeof(opt)) < 0) {
saved_errno = errno;
close(s);
freeaddrinfo(server_res);
errno = saved_errno;
i_errno = IESETBUF;
return -1;
}
if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &opt, sizeof(opt)) < 0) {
saved_errno = errno;
close(s);
freeaddrinfo(server_res);
errno = saved_errno;
i_errno = IESETBUF;
return -1;
}
}
if (test->bind_dev) {
#if defined(SO_BINDTODEVICE)
if (setsockopt(s, SOL_SOCKET, SO_BINDTODEVICE,
test->bind_dev, IFNAMSIZ) < 0)
#endif // SO_BINDTODEVICE
{
saved_errno = errno;
close(s);
freeaddrinfo(local_res);
freeaddrinfo(server_res);
i_errno = IEBINDDEV;
errno = saved_errno;
return -1;
}
}
/*
* Various ways to bind the local end of the connection.
* 1. --bind (with or without --cport).
*/
if (test->bind_address) {
struct sockaddr_in *lcladdr;
lcladdr = (struct sockaddr_in *)local_res->ai_addr;
lcladdr->sin_port = htons(test->bind_port);
if (bind(s, (struct sockaddr *) local_res->ai_addr, local_res->ai_addrlen) < 0) {
saved_errno = errno;
close(s);
freeaddrinfo(local_res);
freeaddrinfo(server_res);
errno = saved_errno;
i_errno = IESTREAMCONNECT;
return -1;
}
freeaddrinfo(local_res);
}
/* --cport, no --bind */
else if (test->bind_port) {
size_t addrlen;
struct sockaddr_storage lcl;
/* IPv4 */
if (server_res->ai_family == AF_INET) {
struct sockaddr_in *lcladdr = (struct sockaddr_in *) &lcl;
lcladdr->sin_family = AF_INET;
lcladdr->sin_port = htons(test->bind_port);
lcladdr->sin_addr.s_addr = INADDR_ANY;
addrlen = sizeof(struct sockaddr_in);
}
/* IPv6 */
else if (server_res->ai_family == AF_INET6) {
struct sockaddr_in6 *lcladdr = (struct sockaddr_in6 *) &lcl;
lcladdr->sin6_family = AF_INET6;
lcladdr->sin6_port = htons(test->bind_port);
lcladdr->sin6_addr = in6addr_any;
addrlen = sizeof(struct sockaddr_in6);
}
/* Unknown protocol */
else {
saved_errno = errno;
close(s);
freeaddrinfo(server_res);
errno = saved_errno;
i_errno = IEPROTOCOL;
return -1;
}
if (bind(s, (struct sockaddr *) &lcl, addrlen) < 0) {
saved_errno = errno;
close(s);
freeaddrinfo(server_res);
errno = saved_errno;
i_errno = IESTREAMCONNECT;
return -1;
}
}
if (test->no_delay != 0) {
opt = 1;
if (setsockopt(s, IPPROTO_SCTP, SCTP_NODELAY, &opt, sizeof(opt)) < 0) {
saved_errno = errno;
close(s);
freeaddrinfo(server_res);
errno = saved_errno;
i_errno = IESETNODELAY;
return -1;
}
}
if ((test->settings->mss >= 512 && test->settings->mss <= 131072)) {
/*
* Some platforms use a struct sctp_assoc_value as the
* argument to SCTP_MAXSEG. Other (older API implementations)
* take an int. FreeBSD 10 and CentOS 6 support SCTP_MAXSEG,
* but OpenSolaris 11 doesn't.
*/
#ifdef HAVE_STRUCT_SCTP_ASSOC_VALUE
struct sctp_assoc_value av;
/*
* Some platforms support SCTP_FUTURE_ASSOC, others need to
* (equivalently) do 0 here. FreeBSD 10 is an example of the
* former, CentOS 6 Linux is an example of the latter.
*/
#ifdef SCTP_FUTURE_ASSOC
av.assoc_id = SCTP_FUTURE_ASSOC;
#else
av.assoc_id = 0;
#endif
av.assoc_value = test->settings->mss;
if (setsockopt(s, IPPROTO_SCTP, SCTP_MAXSEG, &av, sizeof(av)) < 0) {
saved_errno = errno;
close(s);
freeaddrinfo(server_res);
errno = saved_errno;
i_errno = IESETMSS;
return -1;
}
#else
opt = test->settings->mss;
/*
* Solaris might not support this option. If it doesn't work,
* ignore the error (at least for now).
*/
if (setsockopt(s, IPPROTO_SCTP, SCTP_MAXSEG, &opt, sizeof(opt)) < 0 &&
errno != ENOPROTOOPT) {
saved_errno = errno;
close(s);
freeaddrinfo(server_res);
errno = saved_errno;
i_errno = IESETMSS;
return -1;
}
#endif /* HAVE_STRUCT_SCTP_ASSOC_VALUE */
}
if (test->settings->num_ostreams > 0) {
struct sctp_initmsg initmsg;
memset(&initmsg, 0, sizeof(struct sctp_initmsg));
initmsg.sinit_num_ostreams = test->settings->num_ostreams;
if (setsockopt(s, IPPROTO_SCTP, SCTP_INITMSG, &initmsg, sizeof(struct sctp_initmsg)) < 0) {
saved_errno = errno;
close(s);
freeaddrinfo(server_res);
errno = saved_errno;
i_errno = IESETSCTPNSTREAM;
return -1;
}
}
/* clients must call bind() followed by sctp_bindx() before connect() */
if (!TAILQ_EMPTY(&test->xbind_addrs)) {
if (iperf_sctp_bindx(test, s, IPERF_SCTP_CLIENT)) {
freeaddrinfo(server_res);
close(s);
return -1;
}
}
/* TODO support sctp_connectx() to avoid heartbeating. */
if (connect(s, (struct sockaddr *) server_res->ai_addr, server_res->ai_addrlen) < 0 && errno != EINPROGRESS) {
saved_errno = errno;
close(s);
freeaddrinfo(server_res);
errno = saved_errno;
i_errno = IESTREAMCONNECT;
return -1;
}
/* Send cookie for verification */
if (Nwrite(s, test->cookie, COOKIE_SIZE, Psctp) < 0) {
saved_errno = errno;
close(s);
freeaddrinfo(server_res);
errno = saved_errno;
i_errno = IESENDCOOKIE;
return -1;
}
/*
* We want to allow fragmentation. But there's at least one
* implementation (Solaris) that doesn't support this option,
* even though it defines SCTP_DISABLE_FRAGMENTS. So we have to
* try setting the option and ignore the error, if it doesn't
* work.
*/
opt = 0;
if (setsockopt(s, IPPROTO_SCTP, SCTP_DISABLE_FRAGMENTS, &opt, sizeof(opt)) < 0 &&
errno != ENOPROTOOPT) {
saved_errno = errno;
close(s);
freeaddrinfo(server_res);
errno = saved_errno;
i_errno = IESETSCTPDISABLEFRAG;
return -1;
}
freeaddrinfo(server_res);
return s;
#else
i_errno = IENOSCTP;
return -1;
#endif /* HAVE_SCTP_H */
}
int
iperf_sctp_init(struct iperf_test *test)
{
#if defined(HAVE_SCTP_H)
return 0;
#else
i_errno = IENOSCTP;
return -1;
#endif /* HAVE_SCTP_H */
}
/* iperf_sctp_bindx
*
* handle binding to multiple endpoints (-X parameters)
*/
int
iperf_sctp_bindx(struct iperf_test *test, int s, int is_server)
{
#if defined(HAVE_SCTP_H)
struct addrinfo hints;
char portstr[6];
char *servname;
struct addrinfo *ai, *ai0;
struct sockaddr *xaddrs;
struct xbind_entry *xbe, *xbe0;
char *bp;
size_t xaddrlen;
int nxaddrs;
int retval;
int domain;
int saved_errno;
domain = test->settings->domain;
xbe0 = NULL;
retval = 0;
if (TAILQ_EMPTY(&test->xbind_addrs))
return retval; /* nothing to do */
memset(&hints, 0, sizeof(hints));
hints.ai_family = (domain == AF_UNSPEC ? AF_INET6 : domain);
hints.ai_socktype = SOCK_STREAM;
servname = NULL;
if (is_server) {
hints.ai_flags |= AI_PASSIVE;
snprintf(portstr, 6, "%d", test->server_port);
servname = portstr;
}
/* client: must pop first -X address and call bind().
* sctp_bindx() must see the ephemeral port chosen by bind().
* we deliberately ignore the -B argument in this case.
*/
if (!is_server) {
struct sockaddr *sa;
struct sockaddr_in *sin;
struct sockaddr_in6 *sin6;
int eport;
xbe0 = TAILQ_FIRST(&test->xbind_addrs);
TAILQ_REMOVE(&test->xbind_addrs, xbe0, link);
if ((gerror = getaddrinfo(xbe0->name, servname, &hints, &xbe0->ai)) != 0) {
i_errno = IESETSCTPBINDX;
retval = -1;
goto out;
}
ai = xbe0->ai;
if (domain != AF_UNSPEC && domain != ai->ai_family) {
i_errno = IESETSCTPBINDX;
retval = -1;
goto out;
}
if (bind(s, (struct sockaddr *)ai->ai_addr, ai->ai_addrlen) < 0) {
i_errno = IESETSCTPBINDX;
retval = -1;
goto out;
}
/* if only one -X argument, nothing more to do */
if (TAILQ_EMPTY(&test->xbind_addrs))
goto out;
sa = (struct sockaddr *)ai->ai_addr;
if (sa->sa_family == AF_INET) {
sin = (struct sockaddr_in *)ai->ai_addr;
eport = sin->sin_port;
} else if (sa->sa_family == AF_INET6) {
sin6 = (struct sockaddr_in6 *)ai->ai_addr;
eport = sin6->sin6_port;
} else {
i_errno = IESETSCTPBINDX;
retval = -1;
goto out;
}
snprintf(portstr, 6, "%d", ntohs(eport));
servname = portstr;
}
/* pass 1: resolve and compute lengths. */
nxaddrs = 0;
xaddrlen = 0;
TAILQ_FOREACH(xbe, &test->xbind_addrs, link) {
if (xbe->ai != NULL)
freeaddrinfo(xbe->ai);
if ((gerror = getaddrinfo(xbe->name, servname, &hints, &xbe->ai)) != 0) {
i_errno = IESETSCTPBINDX;
retval = -1;
goto out;
}
ai0 = xbe->ai;
for (ai = ai0; ai; ai = ai->ai_next) {
if (domain != AF_UNSPEC && domain != ai->ai_family)
continue;
xaddrlen += ai->ai_addrlen;
++nxaddrs;
}
}
/* pass 2: copy into flat buffer. */
xaddrs = (struct sockaddr *)malloc(xaddrlen);
if (!xaddrs) {
i_errno = IESETSCTPBINDX;
retval = -1;
goto out;
}
bp = (char *)xaddrs;
TAILQ_FOREACH(xbe, &test->xbind_addrs, link) {
ai0 = xbe->ai;
for (ai = ai0; ai; ai = ai->ai_next) {
if (domain != AF_UNSPEC && domain != ai->ai_family)
continue;
memcpy(bp, ai->ai_addr, ai->ai_addrlen);
bp += ai->ai_addrlen;
}
}
if (sctp_bindx(s, xaddrs, nxaddrs, SCTP_BINDX_ADD_ADDR) == -1) {
saved_errno = errno;
close(s);
free(xaddrs);
errno = saved_errno;
i_errno = IESETSCTPBINDX;
retval = -1;
goto out;
}
free(xaddrs);
retval = 0;
out:
/* client: put head node back. */
if (!is_server && xbe0)
TAILQ_INSERT_HEAD(&test->xbind_addrs, xbe0, link);
TAILQ_FOREACH(xbe, &test->xbind_addrs, link) {
if (xbe->ai) {
freeaddrinfo(xbe->ai);
xbe->ai = NULL;
}
}
return retval;
#else
i_errno = IENOSCTP;
return -1;
#endif /* HAVE_SCTP_H */
}
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