// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <errno.h>
#include <limits.h>
#include <fcntl.h>
#include <string.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <signal.h>
#include <unistd.h>
#include <time.h>
#include <sys/ioctl.h>
#include <sys/poll.h>
#include <sys/random.h>
#include <sys/sendfile.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <netdb.h>
#include <netinet/in.h>
#include <linux/tcp.h>
#include <linux/time_types.h>
#include <linux/sockios.h>
extern int optind;
#ifndef IPPROTO_MPTCP
#define IPPROTO_MPTCP 262
#endif
#ifndef TCP_ULP
#define TCP_ULP 31
#endif
static int poll_timeout = 10 * 1000;
static bool listen_mode;
static bool quit;
enum cfg_mode {
CFG_MODE_POLL,
CFG_MODE_MMAP,
CFG_MODE_SENDFILE,
};
enum cfg_peek {
CFG_NONE_PEEK,
CFG_WITH_PEEK,
CFG_AFTER_PEEK,
};
static enum cfg_mode cfg_mode = CFG_MODE_POLL;
static enum cfg_peek cfg_peek = CFG_NONE_PEEK;
static const char *cfg_host;
static const char *cfg_port = "12000";
static int cfg_sock_proto = IPPROTO_MPTCP;
static int pf = AF_INET;
static int cfg_sndbuf;
static int cfg_rcvbuf;
static bool cfg_join;
static bool cfg_remove;
static unsigned int cfg_time;
static unsigned int cfg_do_w;
static int cfg_wait;
static uint32_t cfg_mark;
static char *cfg_input;
static int cfg_repeat = 1;
static int cfg_truncate;
static int cfg_rcv_trunc;
struct cfg_cmsg_types {
unsigned int cmsg_enabled:1;
unsigned int timestampns:1;
unsigned int tcp_inq:1;
};
struct cfg_sockopt_types {
unsigned int transparent:1;
unsigned int mptfo:1;
};
struct tcp_inq_state {
unsigned int last;
bool expect_eof;
};
struct wstate {
char buf[8192];
unsigned int len;
unsigned int off;
unsigned int total_len;
};
static struct tcp_inq_state tcp_inq;
static struct cfg_cmsg_types cfg_cmsg_types;
static struct cfg_sockopt_types cfg_sockopt_types;
static void die_usage(void)
{
fprintf(stderr, "Usage: mptcp_connect [-6] [-c cmsg] [-f offset] [-i file] [-I num] [-j] [-l] "
"[-m mode] [-M mark] [-o option] [-p port] [-P mode] [-r num] [-R num] "
"[-s MPTCP|TCP] [-S num] [-t num] [-T num] [-w sec] connect_address\n");
fprintf(stderr, "\t-6 use ipv6\n");
fprintf(stderr, "\t-c cmsg -- test cmsg type <cmsg>\n");
fprintf(stderr, "\t-f offset -- stop the I/O after receiving and sending the specified amount "
"of bytes. If there are unread bytes in the receive queue, that will cause a MPTCP "
"fastclose at close/shutdown. If offset is negative, expect the peer to close before "
"all the local data as been sent, thus toleration errors on write and EPIPE signals\n");
fprintf(stderr, "\t-i file -- read the data to send from the given file instead of stdin");
fprintf(stderr, "\t-I num -- repeat the transfer 'num' times. In listen mode accepts num "
"incoming connections, in client mode, disconnect and reconnect to the server\n");
fprintf(stderr, "\t-j -- add additional sleep at connection start and tear down "
"-- for MPJ tests\n");
fprintf(stderr, "\t-l -- listens mode, accepts incoming connection\n");
fprintf(stderr, "\t-m [poll|mmap|sendfile] -- use poll(default)/mmap+write/sendfile\n");
fprintf(stderr, "\t-M mark -- set socket packet mark\n");
fprintf(stderr, "\t-o option -- test sockopt <option>\n");
fprintf(stderr, "\t-p num -- use port num\n");
fprintf(stderr,
"\t-P [saveWithPeek|saveAfterPeek] -- save data with/after MSG_PEEK form tcp socket\n");
fprintf(stderr, "\t-r num -- enable slow mode, limiting each write to num bytes "
"-- for remove addr tests\n");
fprintf(stderr, "\t-R num -- set SO_RCVBUF to num\n");
fprintf(stderr, "\t-s [MPTCP|TCP] -- use mptcp(default) or tcp sockets\n");
fprintf(stderr, "\t-S num -- set SO_SNDBUF to num\n");
fprintf(stderr, "\t-t num -- set poll timeout to num\n");
fprintf(stderr, "\t-T num -- set expected runtime to num ms\n");
fprintf(stderr, "\t-w num -- wait num sec before closing the socket\n");
exit(1);
}
static void xerror(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
exit(1);
}
static void handle_signal(int nr)
{
quit = true;
}
static const char *getxinfo_strerr(int err)
{
if (err == EAI_SYSTEM)
return strerror(errno);
return gai_strerror(err);
}
static void xgetnameinfo(const struct sockaddr *addr, socklen_t addrlen,
char *host, socklen_t hostlen,
char *serv, socklen_t servlen)
{
int flags = NI_NUMERICHOST | NI_NUMERICSERV;
int err = getnameinfo(addr, addrlen, host, hostlen, serv, servlen,
flags);
if (err) {
const char *errstr = getxinfo_strerr(err);
fprintf(stderr, "Fatal: getnameinfo: %s\n", errstr);
exit(1);
}
}
static void xgetaddrinfo(const char *node, const char *service,
const struct addrinfo *hints,
struct addrinfo **res)
{
int err = getaddrinfo(node, service, hints, res);
if (err) {
const char *errstr = getxinfo_strerr(err);
fprintf(stderr, "Fatal: getaddrinfo(%s:%s): %s\n",
node ? node : "", service ? service : "", errstr);
exit(1);
}
}
static void set_rcvbuf(int fd, unsigned int size)
{
int err;
err = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &size, sizeof(size));
if (err) {
perror("set SO_RCVBUF");
exit(1);
}
}
static void set_sndbuf(int fd, unsigned int size)
{
int err;
err = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &size, sizeof(size));
if (err) {
perror("set SO_SNDBUF");
exit(1);
}
}
static void set_mark(int fd, uint32_t mark)
{
int err;
err = setsockopt(fd, SOL_SOCKET, SO_MARK, &mark, sizeof(mark));
if (err) {
perror("set SO_MARK");
exit(1);
}
}
static void set_transparent(int fd, int pf)
{
int one = 1;
switch (pf) {
case AF_INET:
if (-1 == setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)))
perror("IP_TRANSPARENT");
break;
case AF_INET6:
if (-1 == setsockopt(fd, IPPROTO_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)))
perror("IPV6_TRANSPARENT");
break;
}
}
static void set_mptfo(int fd, int pf)
{
int qlen = 25;
if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &qlen, sizeof(qlen)) == -1)
perror("TCP_FASTOPEN");
}
static int do_ulp_so(int sock, const char *name)
{
return setsockopt(sock, IPPROTO_TCP, TCP_ULP, name, strlen(name));
}
#define X(m) xerror("%s:%u: %s: failed for proto %d at line %u", __FILE__, __LINE__, (m), proto, line)
static void sock_test_tcpulp(int sock, int proto, unsigned int line)
{
socklen_t buflen = 8;
char buf[8] = "";
int ret = getsockopt(sock, IPPROTO_TCP, TCP_ULP, buf, &buflen);
if (ret != 0)
X("getsockopt");
if (buflen > 0) {
if (strcmp(buf, "mptcp") != 0)
xerror("unexpected ULP '%s' for proto %d at line %u", buf, proto, line);
ret = do_ulp_so(sock, "tls");
if (ret == 0)
X("setsockopt");
} else if (proto == IPPROTO_MPTCP) {
ret = do_ulp_so(sock, "tls");
if (ret != -1)
X("setsockopt");
}
ret = do_ulp_so(sock, "mptcp");
if (ret != -1)
X("setsockopt");
#undef X
}
#define SOCK_TEST_TCPULP(s, p) sock_test_tcpulp((s), (p), __LINE__)
static int sock_listen_mptcp(const char * const listenaddr,
const char * const port)
{
int sock = -1;
struct addrinfo hints = {
.ai_protocol = IPPROTO_TCP,
.ai_socktype = SOCK_STREAM,
.ai_flags = AI_PASSIVE | AI_NUMERICHOST
};
hints.ai_family = pf;
struct addrinfo *a, *addr;
int one = 1;
xgetaddrinfo(listenaddr, port, &hints, &addr);
hints.ai_family = pf;
for (a = addr; a; a = a->ai_next) {
sock = socket(a->ai_family, a->ai_socktype, cfg_sock_proto);
if (sock < 0)
continue;
SOCK_TEST_TCPULP(sock, cfg_sock_proto);
if (-1 == setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &one,
sizeof(one)))
perror("setsockopt");
if (cfg_sockopt_types.transparent)
set_transparent(sock, pf);
if (cfg_sockopt_types.mptfo)
set_mptfo(sock, pf);
if (bind(sock, a->ai_addr, a->ai_addrlen) == 0)
break; /* success */
perror("bind");
close(sock);
sock = -1;
}
freeaddrinfo(addr);
if (sock < 0) {
fprintf(stderr, "Could not create listen socket\n");
return sock;
}
SOCK_TEST_TCPULP(sock, cfg_sock_proto);
if (listen(sock, 20)) {
perror("listen");
close(sock);
return -1;
}
SOCK_TEST_TCPULP(sock, cfg_sock_proto);
return sock;
}
static int sock_connect_mptcp(const char * const remoteaddr,
const char * const port, int proto,
struct addrinfo **peer,
int infd, struct wstate *winfo)
{
struct addrinfo hints = {
.ai_protocol = IPPROTO_TCP,
.ai_socktype = SOCK_STREAM,
};
struct addrinfo *a, *addr;
int syn_copied = 0;
int sock = -1;
hints.ai_family = pf;
xgetaddrinfo(remoteaddr, port, &hints, &addr);
for (a = addr; a; a = a->ai_next) {
sock = socket(a->ai_family, a->ai_socktype, proto);
if (sock < 0) {
perror("socket");
continue;
}
SOCK_TEST_TCPULP(sock, proto);
if (cfg_mark)
set_mark(sock, cfg_mark);
if (cfg_sockopt_types.mptfo) {
if (!winfo->total_len)
winfo->total_len = winfo->len = read(infd, winfo->buf,
sizeof(winfo->buf));
syn_copied = sendto(sock, winfo->buf, winfo->len, MSG_FASTOPEN,
a->ai_addr, a->ai_addrlen);
if (syn_copied >= 0) {
winfo->off = syn_copied;
winfo->len -= syn_copied;
*peer = a;
break; /* success */
}
} else {
if (connect(sock, a->ai_addr, a->ai_addrlen) == 0) {
*peer = a;
break; /* success */
}
}
if (cfg_sockopt_types.mptfo) {
perror("sendto()");
close(sock);
sock = -1;
} else {
perror("connect()");
close(sock);
sock = -1;
}
}
freeaddrinfo(addr);
if (sock != -1)
SOCK_TEST_TCPULP(sock, proto);
return sock;
}
static size_t do_rnd_write(const int fd, char *buf, const size_t len)
{
static bool first = true;
unsigned int do_w;
ssize_t bw;
do_w = rand() & 0xffff;
if (do_w == 0 || do_w > len)
do_w = len;
if (cfg_join && first && do_w > 100)
do_w = 100;
if (cfg_remove && do_w > cfg_do_w)
do_w = cfg_do_w;
bw = write(fd, buf, do_w);
if (bw < 0)
return bw;
/* let the join handshake complete, before going on */
if (cfg_join && first) {
usleep(200000);
first = false;
}
if (cfg_remove)
usleep(200000);
return bw;
}
static size_t do_write(const int fd, char *buf, const size_t len)
{
size_t offset = 0;
while (offset < len) {
size_t written;
ssize_t bw;
bw = write(fd, buf + offset, len - offset);
if (bw < 0) {
perror("write");
return 0;
}
written = (size_t)bw;
offset += written;
}
return offset;
}
static void process_cmsg(struct msghdr *msgh)
{
struct __kernel_timespec ts;
bool inq_found = false;
bool ts_found = false;
unsigned int inq = 0;
struct cmsghdr *cmsg;
for (cmsg = CMSG_FIRSTHDR(msgh); cmsg ; cmsg = CMSG_NXTHDR(msgh, cmsg)) {
if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SO_TIMESTAMPNS_NEW) {
memcpy(&ts, CMSG_DATA(cmsg), sizeof(ts));
ts_found = true;
continue;
}
if (cmsg->cmsg_level == IPPROTO_TCP && cmsg->cmsg_type == TCP_CM_INQ) {
memcpy(&inq, CMSG_DATA(cmsg), sizeof(inq));
inq_found = true;
continue;
}
}
if (cfg_cmsg_types.timestampns) {
if (!ts_found)
xerror("TIMESTAMPNS not present\n");
}
if (cfg_cmsg_types.tcp_inq) {
if (!inq_found)
xerror("TCP_INQ not present\n");
if (inq > 1024)
xerror("tcp_inq %u is larger than one kbyte\n", inq);
tcp_inq.last = inq;
}
}
static ssize_t do_recvmsg_cmsg(const int fd, char *buf, const size_t len)
{
char msg_buf[8192];
struct iovec iov = {
.iov_base = buf,
.iov_len = len,
};
struct msghdr msg = {
.msg_iov = &iov,
.msg_iovlen = 1,
.msg_control = msg_buf,
.msg_controllen = sizeof(msg_buf),
};
int flags = 0;
unsigned int last_hint = tcp_inq.last;
int ret = recvmsg(fd, &msg, flags);
if (ret <= 0) {
if (ret == 0 && tcp_inq.expect_eof)
return ret;
if (ret == 0 && cfg_cmsg_types.tcp_inq)
if (last_hint != 1 && last_hint != 0)
xerror("EOF but last tcp_inq hint was %u\n", last_hint);
return ret;
}
if (tcp_inq.expect_eof)
xerror("expected EOF, last_hint %u, now %u\n",
last_hint, tcp_inq.last);
if (msg.msg_controllen && !cfg_cmsg_types.cmsg_enabled)
xerror("got %lu bytes of cmsg data, expected 0\n",
(unsigned long)msg.msg_controllen);
if (msg.msg_controllen == 0 && cfg_cmsg_types.cmsg_enabled)
xerror("%s\n", "got no cmsg data");
if (msg.msg_controllen)
process_cmsg(&msg);
if (cfg_cmsg_types.tcp_inq) {
if ((size_t)ret < len && last_hint > (unsigned int)ret) {
if (ret + 1 != (int)last_hint) {
int next = read(fd, msg_buf, sizeof(msg_buf));
xerror("read %u of %u, last_hint was %u tcp_inq hint now %u next_read returned %d/%m\n",
ret, (unsigned int)len, last_hint, tcp_inq.last, next);
} else {
tcp_inq.expect_eof = true;
}
}
}
return ret;
}
static ssize_t do_rnd_read(const int fd, char *buf, const size_t len)
{
int ret = 0;
char tmp[16384];
size_t cap = rand();
cap &= 0xffff;
if (cap == 0)
cap = 1;
else if (cap > len)
cap = len;
if (cfg_peek == CFG_WITH_PEEK) {
ret = recv(fd, buf, cap, MSG_PEEK);
ret = (ret < 0) ? ret : read(fd, tmp, ret);
} else if (cfg_peek == CFG_AFTER_PEEK) {
ret = recv(fd, buf, cap, MSG_PEEK);
ret = (ret < 0) ? ret : read(fd, buf, cap);
} else if (cfg_cmsg_types.cmsg_enabled) {
ret = do_recvmsg_cmsg(fd, buf, cap);
} else {
ret = read(fd, buf, cap);
}
return ret;
}
static void set_nonblock(int fd, bool nonblock)
{
int flags = fcntl(fd, F_GETFL);
if (flags == -1)
return;
if (nonblock)
fcntl(fd, F_SETFL, flags | O_NONBLOCK);
else
fcntl(fd, F_SETFL, flags & ~O_NONBLOCK);
}
static void shut_wr(int fd)
{
/* Close our write side, ev. give some time
* for address notification and/or checking
* the current status
*/
if (cfg_wait)
usleep(cfg_wait);
shutdown(fd, SHUT_WR);
}
static int copyfd_io_poll(int infd, int peerfd, int outfd,
bool *in_closed_after_out, struct wstate *winfo)
{
struct pollfd fds = {
.fd = peerfd,
.events = POLLIN | POLLOUT,
};
unsigned int total_wlen = 0, total_rlen = 0;
set_nonblock(peerfd, true);
for (;;) {
char rbuf[8192];
ssize_t len;
if (fds.events == 0 || quit)
break;
switch (poll(&fds, 1, poll_timeout)) {
case -1:
if (errno == EINTR)
continue;
perror("poll");
return 1;
case 0:
fprintf(stderr, "%s: poll timed out (events: "
"POLLIN %u, POLLOUT %u)\n", __func__,
fds.events & POLLIN, fds.events & POLLOUT);
return 2;
}
if (fds.revents & POLLIN) {
ssize_t rb = sizeof(rbuf);
/* limit the total amount of read data to the trunc value*/
if (cfg_truncate > 0) {
if (rb + total_rlen > cfg_truncate)
rb = cfg_truncate - total_rlen;
len = read(peerfd, rbuf, rb);
} else {
len = do_rnd_read(peerfd, rbuf, sizeof(rbuf));
}
if (len == 0) {
/* no more data to receive:
* peer has closed its write side
*/
fds.events &= ~POLLIN;
if ((fds.events & POLLOUT) == 0) {
*in_closed_after_out = true;
/* and nothing more to send */
break;
}
/* Else, still have data to transmit */
} else if (len < 0) {
if (cfg_rcv_trunc)
return 0;
perror("read");
return 3;
}
total_rlen += len;
do_write(outfd, rbuf, len);
}
if (fds.revents & POLLOUT) {
if (winfo->len == 0) {
winfo->off = 0;
winfo->len = read(infd, winfo->buf, sizeof(winfo->buf));
}
if (winfo->len > 0) {
ssize_t bw;
/* limit the total amount of written data to the trunc value */
if (cfg_truncate > 0 && winfo->len + total_wlen > cfg_truncate)
winfo->len = cfg_truncate - total_wlen;
bw = do_rnd_write(peerfd, winfo->buf + winfo->off, winfo->len);
if (bw < 0) {
if (cfg_rcv_trunc)
return 0;
perror("write");
return 111;
}
winfo->off += bw;
winfo->len -= bw;
total_wlen += bw;
} else if (winfo->len == 0) {
/* We have no more data to send. */
fds.events &= ~POLLOUT;
if ((fds.events & POLLIN) == 0)
/* ... and peer also closed already */
break;
shut_wr(peerfd);
} else {
if (errno == EINTR)
continue;
perror("read");
return 4;
}
}
if (fds.revents & (POLLERR | POLLNVAL)) {
if (cfg_rcv_trunc)
return 0;
fprintf(stderr, "Unexpected revents: "
"POLLERR/POLLNVAL(%x)\n", fds.revents);
return 5;
}
if (cfg_truncate > 0 && total_wlen >= cfg_truncate &&
total_rlen >= cfg_truncate)
break;
}
/* leave some time for late join/announce */
if (cfg_remove && !quit)
usleep(cfg_wait);
return 0;
}
static int do_recvfile(int infd, int outfd)
{
ssize_t r;
do {
char buf[16384];
r = do_rnd_read(infd, buf, sizeof(buf));
if (r > 0) {
if (write(outfd, buf, r) != r)
break;
} else if (r < 0) {
perror("read");
}
} while (r > 0);
return (int)r;
}
static int spool_buf(int fd, struct wstate *winfo)
{
while (winfo->len) {
int ret = write(fd, winfo->buf + winfo->off, winfo->len);
if (ret < 0) {
perror("write");
return 4;
}
winfo->off += ret;
winfo->len -= ret;
}
return 0;
}
static int do_mmap(int infd, int outfd, unsigned int size,
struct wstate *winfo)
{
char *inbuf = mmap(NULL, size, PROT_READ, MAP_SHARED, infd, 0);
ssize_t ret = 0, off = winfo->total_len;
size_t rem;
if (inbuf == MAP_FAILED) {
perror("mmap");
return 1;
}
ret = spool_buf(outfd, winfo);
if (ret < 0)
return ret;
rem = size - winfo->total_len;
while (rem > 0) {
ret = write(outfd, inbuf + off, rem);
if (ret < 0) {
perror("write");
break;
}
off += ret;
rem -= ret;
}
munmap(inbuf, size);
return rem;
}
static int get_infd_size(int fd)
{
struct stat sb;
ssize_t count;
int err;
err = fstat(fd, &sb);
if (err < 0) {
perror("fstat");
return -1;
}
if ((sb.st_mode & S_IFMT) != S_IFREG) {
fprintf(stderr, "%s: stdin is not a regular file\n", __func__);
return -2;
}
count = sb.st_size;
if (count > INT_MAX) {
fprintf(stderr, "File too large: %zu\n", count);
return -3;
}
return (int)count;
}
static int do_sendfile(int infd, int outfd, unsigned int count,
struct wstate *winfo)
{
int ret = spool_buf(outfd, winfo);
if (ret < 0)
return ret;
count -= winfo->total_len;
while (count > 0) {
ssize_t r;
r = sendfile(outfd, infd, NULL, count);
if (r < 0) {
perror("sendfile");
return 3;
}
count -= r;
}
return 0;
}
static int copyfd_io_mmap(int infd, int peerfd, int outfd,
unsigned int size, bool *in_closed_after_out,
struct wstate *winfo)
{
int err;
if (listen_mode) {
err = do_recvfile(peerfd, outfd);
if (err)
return err;
err = do_mmap(infd, peerfd, size, winfo);
} else {
err = do_mmap(infd, peerfd, size, winfo);
if (err)
return err;
shut_wr(peerfd);
err = do_recvfile(peerfd, outfd);
*in_closed_after_out = true;
}
return err;
}
static int copyfd_io_sendfile(int infd, int peerfd, int outfd,
unsigned int size, bool *in_closed_after_out, struct wstate *winfo)
{
int err;
if (listen_mode) {
err = do_recvfile(peerfd, outfd);
if (err)
return err;
err = do_sendfile(infd, peerfd, size, winfo);
} else {
err = do_sendfile(infd, peerfd, size, winfo);
if (err)
return err;
shut_wr(peerfd);
err = do_recvfile(peerfd, outfd);
*in_closed_after_out = true;
}
return err;
}
static int copyfd_io(int infd, int peerfd, int outfd, bool close_peerfd, struct wstate *winfo)
{
bool in_closed_after_out = false;
struct timespec start, end;
int file_size;
int ret;
if (cfg_time && (clock_gettime(CLOCK_MONOTONIC, &start) < 0))
xerror("can not fetch start time %d", errno);
switch (cfg_mode) {
case CFG_MODE_POLL:
ret = copyfd_io_poll(infd, peerfd, outfd, &in_closed_after_out,
winfo);
break;
case CFG_MODE_MMAP:
file_size = get_infd_size(infd);
if (file_size < 0)
return file_size;
ret = copyfd_io_mmap(infd, peerfd, outfd, file_size,
&in_closed_after_out, winfo);
break;
case CFG_MODE_SENDFILE:
file_size = get_infd_size(infd);
if (file_size < 0)
return file_size;
ret = copyfd_io_sendfile(infd, peerfd, outfd, file_size,
&in_closed_after_out, winfo);
break;
default:
fprintf(stderr, "Invalid mode %d\n", cfg_mode);
die_usage();
return 1;
}
if (ret)
return ret;
if (close_peerfd)
close(peerfd);
if (cfg_time) {
unsigned int delta_ms;
if (clock_gettime(CLOCK_MONOTONIC, &end) < 0)
xerror("can not fetch end time %d", errno);
delta_ms = (end.tv_sec - start.tv_sec) * 1000 + (end.tv_nsec - start.tv_nsec) / 1000000;
if (delta_ms > cfg_time) {
xerror("transfer slower than expected! runtime %d ms, expected %d ms",
delta_ms, cfg_time);
}
/* show the runtime only if this end shutdown(wr) before receiving the EOF,
* (that is, if this end got the longer runtime)
*/
if (in_closed_after_out)
fprintf(stderr, "%d", delta_ms);
}
return 0;
}
static void check_sockaddr(int pf, struct sockaddr_storage *ss,
socklen_t salen)
{
struct sockaddr_in6 *sin6;
struct sockaddr_in *sin;
socklen_t wanted_size = 0;
switch (pf) {
case AF_INET:
wanted_size = sizeof(*sin);
sin = (void *)ss;
if (!sin->sin_port)
fprintf(stderr, "accept: something wrong: ip connection from port 0");
break;
case AF_INET6:
wanted_size = sizeof(*sin6);
sin6 = (void *)ss;
if (!sin6->sin6_port)
fprintf(stderr, "accept: something wrong: ipv6 connection from port 0");
break;
default:
fprintf(stderr, "accept: Unknown pf %d, salen %u\n", pf, salen);
return;
}
if (salen != wanted_size)
fprintf(stderr, "accept: size mismatch, got %d expected %d\n",
(int)salen, wanted_size);
if (ss->ss_family != pf)
fprintf(stderr, "accept: pf mismatch, expect %d, ss_family is %d\n",
(int)ss->ss_family, pf);
}
static void check_getpeername(int fd, struct sockaddr_storage *ss, socklen_t salen)
{
struct sockaddr_storage peerss;
socklen_t peersalen = sizeof(peerss);
if (getpeername(fd, (struct sockaddr *)&peerss, &peersalen) < 0) {
perror("getpeername");
return;
}
if (peersalen != salen) {
fprintf(stderr, "%s: %d vs %d\n", __func__, peersalen, salen);
return;
}
if (memcmp(ss, &peerss, peersalen)) {
char a[INET6_ADDRSTRLEN];
char b[INET6_ADDRSTRLEN];
char c[INET6_ADDRSTRLEN];
char d[INET6_ADDRSTRLEN];
xgetnameinfo((struct sockaddr *)ss, salen,
a, sizeof(a), b, sizeof(b));
xgetnameinfo((struct sockaddr *)&peerss, peersalen,
c, sizeof(c), d, sizeof(d));
fprintf(stderr, "%s: memcmp failure: accept %s vs peername %s, %s vs %s salen %d vs %d\n",
__func__, a, c, b, d, peersalen, salen);
}
}
static void check_getpeername_connect(int fd)
{
struct sockaddr_storage ss;
socklen_t salen = sizeof(ss);
char a[INET6_ADDRSTRLEN];
char b[INET6_ADDRSTRLEN];
if (getpeername(fd, (struct sockaddr *)&ss, &salen) < 0) {
perror("getpeername");
return;
}
xgetnameinfo((struct sockaddr *)&ss, salen,
a, sizeof(a), b, sizeof(b));
if (strcmp(cfg_host, a) || strcmp(cfg_port, b))
fprintf(stderr, "%s: %s vs %s, %s vs %s\n", __func__,
cfg_host, a, cfg_port, b);
}
static void maybe_close(int fd)
{
unsigned int r = rand();
if (!(cfg_join || cfg_remove || cfg_repeat > 1) && (r & 1))
close(fd);
}
int main_loop_s(int listensock)
{
struct sockaddr_storage ss;
struct wstate winfo;
struct pollfd polls;
socklen_t salen;
int remotesock;
int fd = 0;
again:
polls.fd = listensock;
polls.events = POLLIN;
switch (poll(&polls, 1, poll_timeout)) {
case -1:
perror("poll");
return 1;
case 0:
fprintf(stderr, "%s: timed out\n", __func__);
close(listensock);
return 2;
}
salen = sizeof(ss);
remotesock = accept(listensock, (struct sockaddr *)&ss, &salen);
if (remotesock >= 0) {
maybe_close(listensock);
check_sockaddr(pf, &ss, salen);
check_getpeername(remotesock, &ss, salen);
if (cfg_input) {
fd = open(cfg_input, O_RDONLY);
if (fd < 0)
xerror("can't open %s: %d", cfg_input, errno);
}
SOCK_TEST_TCPULP(remotesock, 0);
memset(&winfo, 0, sizeof(winfo));
copyfd_io(fd, remotesock, 1, true, &winfo);
} else {
perror("accept");
return 1;
}
if (cfg_input)
close(fd);
if (--cfg_repeat > 0)
goto again;
return 0;
}
static void init_rng(void)
{
unsigned int foo;
if (getrandom(&foo, sizeof(foo), 0) == -1) {
perror("getrandom");
exit(1);
}
srand(foo);
}
static void xsetsockopt(int fd, int level, int optname, const void *optval, socklen_t optlen)
{
int err;
err = setsockopt(fd, level, optname, optval, optlen);
if (err) {
perror("setsockopt");
exit(1);
}
}
static void apply_cmsg_types(int fd, const struct cfg_cmsg_types *cmsg)
{
static const unsigned int on = 1;
if (cmsg->timestampns)
xsetsockopt(fd, SOL_SOCKET, SO_TIMESTAMPNS_NEW, &on, sizeof(on));
if (cmsg->tcp_inq)
xsetsockopt(fd, IPPROTO_TCP, TCP_INQ, &on, sizeof(on));
}
static void parse_cmsg_types(const char *type)
{
char *next = strchr(type, ',');
unsigned int len = 0;
cfg_cmsg_types.cmsg_enabled = 1;
if (next) {
parse_cmsg_types(next + 1);
len = next - type;
} else {
len = strlen(type);
}
if (strncmp(type, "TIMESTAMPNS", len) == 0) {
cfg_cmsg_types.timestampns = 1;
return;
}
if (strncmp(type, "TCPINQ", len) == 0) {
cfg_cmsg_types.tcp_inq = 1;
return;
}
fprintf(stderr, "Unrecognized cmsg option %s\n", type);
exit(1);
}
static void parse_setsock_options(const char *name)
{
char *next = strchr(name, ',');
unsigned int len = 0;
if (next) {
parse_setsock_options(next + 1);
len = next - name;
} else {
len = strlen(name);
}
if (strncmp(name, "TRANSPARENT", len) == 0) {
cfg_sockopt_types.transparent = 1;
return;
}
if (strncmp(name, "MPTFO", len) == 0) {
cfg_sockopt_types.mptfo = 1;
return;
}
fprintf(stderr, "Unrecognized setsockopt option %s\n", name);
exit(1);
}
void xdisconnect(int fd, int addrlen)
{
struct sockaddr_storage empty;
int msec_sleep = 10;
int queued = 1;
int i;
shutdown(fd, SHUT_WR);
/* while until the pending data is completely flushed, the later
* disconnect will bypass/ignore/drop any pending data.
*/
for (i = 0; ; i += msec_sleep) {
if (ioctl(fd, SIOCOUTQ, &queued) < 0)
xerror("can't query out socket queue: %d", errno);
if (!queued)
break;
if (i > poll_timeout)
xerror("timeout while waiting for spool to complete");
usleep(msec_sleep * 1000);
}
memset(&empty, 0, sizeof(empty));
empty.ss_family = AF_UNSPEC;
if (connect(fd, (struct sockaddr *)&empty, addrlen) < 0)
xerror("can't disconnect: %d", errno);
}
int main_loop(void)
{
int fd = 0, ret, fd_in = 0;
struct addrinfo *peer;
struct wstate winfo;
if (cfg_input && cfg_sockopt_types.mptfo) {
fd_in = open(cfg_input, O_RDONLY);
if (fd < 0)
xerror("can't open %s:%d", cfg_input, errno);
}
memset(&winfo, 0, sizeof(winfo));
fd = sock_connect_mptcp(cfg_host, cfg_port, cfg_sock_proto, &peer, fd_in, &winfo);
if (fd < 0)
return 2;
again:
check_getpeername_connect(fd);
SOCK_TEST_TCPULP(fd, cfg_sock_proto);
if (cfg_rcvbuf)
set_rcvbuf(fd, cfg_rcvbuf);
if (cfg_sndbuf)
set_sndbuf(fd, cfg_sndbuf);
if (cfg_cmsg_types.cmsg_enabled)
apply_cmsg_types(fd, &cfg_cmsg_types);
if (cfg_input && !cfg_sockopt_types.mptfo) {
fd_in = open(cfg_input, O_RDONLY);
if (fd < 0)
xerror("can't open %s:%d", cfg_input, errno);
}
ret = copyfd_io(fd_in, fd, 1, 0, &winfo);
if (ret)
return ret;
if (cfg_truncate > 0) {
xdisconnect(fd, peer->ai_addrlen);
} else if (--cfg_repeat > 0) {
xdisconnect(fd, peer->ai_addrlen);
/* the socket could be unblocking at this point, we need the
* connect to be blocking
*/
set_nonblock(fd, false);
if (connect(fd, peer->ai_addr, peer->ai_addrlen))
xerror("can't reconnect: %d", errno);
if (cfg_input)
close(fd_in);
memset(&winfo, 0, sizeof(winfo));
goto again;
} else {
close(fd);
}
return 0;
}
int parse_proto(const char *proto)
{
if (!strcasecmp(proto, "MPTCP"))
return IPPROTO_MPTCP;
if (!strcasecmp(proto, "TCP"))
return IPPROTO_TCP;
fprintf(stderr, "Unknown protocol: %s\n.", proto);
die_usage();
/* silence compiler warning */
return 0;
}
int parse_mode(const char *mode)
{
if (!strcasecmp(mode, "poll"))
return CFG_MODE_POLL;
if (!strcasecmp(mode, "mmap"))
return CFG_MODE_MMAP;
if (!strcasecmp(mode, "sendfile"))
return CFG_MODE_SENDFILE;
fprintf(stderr, "Unknown test mode: %s\n", mode);
fprintf(stderr, "Supported modes are:\n");
fprintf(stderr, "\t\t\"poll\" - interleaved read/write using poll()\n");
fprintf(stderr, "\t\t\"mmap\" - send entire input file (mmap+write), then read response (-l will read input first)\n");
fprintf(stderr, "\t\t\"sendfile\" - send entire input file (sendfile), then read response (-l will read input first)\n");
die_usage();
/* silence compiler warning */
return 0;
}
int parse_peek(const char *mode)
{
if (!strcasecmp(mode, "saveWithPeek"))
return CFG_WITH_PEEK;
if (!strcasecmp(mode, "saveAfterPeek"))
return CFG_AFTER_PEEK;
fprintf(stderr, "Unknown: %s\n", mode);
fprintf(stderr, "Supported MSG_PEEK mode are:\n");
fprintf(stderr,
"\t\t\"saveWithPeek\" - recv data with flags 'MSG_PEEK' and save the peek data into file\n");
fprintf(stderr,
"\t\t\"saveAfterPeek\" - read and save data into file after recv with flags 'MSG_PEEK'\n");
die_usage();
/* silence compiler warning */
return 0;
}
static int parse_int(const char *size)
{
unsigned long s;
errno = 0;
s = strtoul(size, NULL, 0);
if (errno) {
fprintf(stderr, "Invalid sndbuf size %s (%s)\n",
size, strerror(errno));
die_usage();
}
if (s > INT_MAX) {
fprintf(stderr, "Invalid sndbuf size %s (%s)\n",
size, strerror(ERANGE));
die_usage();
}
return (int)s;
}
static void parse_opts(int argc, char **argv)
{
int c;
while ((c = getopt(argc, argv, "6c:f:hi:I:jlm:M:o:p:P:r:R:s:S:t:T:w:")) != -1) {
switch (c) {
case 'f':
cfg_truncate = atoi(optarg);
/* when receiving a fastclose, ignore PIPE signals and
* all the I/O errors later in the code
*/
if (cfg_truncate < 0) {
cfg_rcv_trunc = true;
signal(SIGPIPE, handle_signal);
}
break;
case 'j':
cfg_join = true;
cfg_mode = CFG_MODE_POLL;
break;
case 'r':
cfg_remove = true;
cfg_mode = CFG_MODE_POLL;
cfg_wait = 400000;
cfg_do_w = atoi(optarg);
if (cfg_do_w <= 0)
cfg_do_w = 50;
break;
case 'i':
cfg_input = optarg;
break;
case 'I':
cfg_repeat = atoi(optarg);
break;
case 'l':
listen_mode = true;
break;
case 'p':
cfg_port = optarg;
break;
case 's':
cfg_sock_proto = parse_proto(optarg);
break;
case 'h':
die_usage();
break;
case '6':
pf = AF_INET6;
break;
case 't':
poll_timeout = atoi(optarg) * 1000;
if (poll_timeout <= 0)
poll_timeout = -1;
break;
case 'T':
cfg_time = atoi(optarg);
break;
case 'm':
cfg_mode = parse_mode(optarg);
break;
case 'S':
cfg_sndbuf = parse_int(optarg);
break;
case 'R':
cfg_rcvbuf = parse_int(optarg);
break;
case 'w':
cfg_wait = atoi(optarg)*1000000;
break;
case 'M':
cfg_mark = strtol(optarg, NULL, 0);
break;
case 'P':
cfg_peek = parse_peek(optarg);
break;
case 'c':
parse_cmsg_types(optarg);
break;
case 'o':
parse_setsock_options(optarg);
break;
}
}
if (optind + 1 != argc)
die_usage();
cfg_host = argv[optind];
if (strchr(cfg_host, ':'))
pf = AF_INET6;
}
int main(int argc, char *argv[])
{
init_rng();
signal(SIGUSR1, handle_signal);
parse_opts(argc, argv);
if (listen_mode) {
int fd = sock_listen_mptcp(cfg_host, cfg_port);
if (fd < 0)
return 1;
if (cfg_rcvbuf)
set_rcvbuf(fd, cfg_rcvbuf);
if (cfg_sndbuf)
set_sndbuf(fd, cfg_sndbuf);
if (cfg_mark)
set_mark(fd, cfg_mark);
if (cfg_cmsg_types.cmsg_enabled)
apply_cmsg_types(fd, &cfg_cmsg_types);
return main_loop_s(fd);
}
return main_loop();
}
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