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tcpbench.c
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/* $OpenBSD: tcpbench.c,v 1.72 2024/12/28 11:51:21 bluhm Exp $ */
/*
* Copyright (c) 2008 Damien Miller <djm@mindrot.org>
* Copyright (c) 2011 Christiano F. Haesbaert <haesbaert@haesbaert.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#ifdef __OpenBSD__
#include <sys/socketvar.h>
#endif
#include <sys/resource.h>
#include <sys/queue.h>
#include <sys/un.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#ifdef __OpenBSD__
#include <netinet/tcp_timer.h>
#include <netinet/tcp_fsm.h>
#include <netinet/in_pcb.h>
#include <netinet/tcp_var.h>
#endif
#include <arpa/inet.h>
#include <unistd.h>
#include <limits.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#ifdef __OpenBSD__
#include <event.h>
#else
#include <event2/event_struct.h>
#include <event2/event.h>
#include <event2/event_compat.h>
#endif
#include <netdb.h>
#include <signal.h>
#include <err.h>
#include <fcntl.h>
#include <poll.h>
#include <paths.h>
#include <math.h>
#include <tls.h>
#include <openssl/evp.h>
#include <openssl/rsa.h>
#include <openssl/pem.h>
#include <openssl/x509.h>
#define DEFAULT_PORT "12345"
#define DEFAULT_STATS_INTERVAL 1000 /* ms */
#define DEFAULT_BUF (256 * 1024)
#define DEFAULT_UDP_PKT (1500 - 28) /* TODO don't hardcode this */
#define TCP_MODE !ptb->uflag
#define UDP_MODE ptb->uflag
#define MAX_FD 1024
/* Our tcpbench globals */
struct {
int Dflag; /* Socket debug */
int Sflag; /* Socket buffer size */
u_int rflag; /* Report rate (ms) */
int sflag; /* True if server */
int Tflag; /* ToS if != -1 */
int vflag; /* Verbose */
int uflag; /* UDP mode */
int Uflag; /* UNIX (AF_LOCAL) mode */
int Rflag; /* randomize client write size */
char **kvars; /* Kvm enabled vars */
char *dummybuf; /* IO buffer */
size_t dummybuf_len; /* IO buffer len */
struct tls_config *tls_cfg;
} tcpbench, *ptb;
struct tcpservsock {
struct event ev;
struct event evt;
int fd;
};
/* stats for a single tcp connection, udp uses only one */
struct statctx {
TAILQ_ENTRY(statctx) entry;
struct timeval t_start, t_last;
unsigned long long bytes;
int fd;
char *buf;
size_t buflen;
struct event ev;
/* TCP only */
struct tcpservsock *tcp_ts;
/* UDP only */
u_long udp_slice_pkts;
/* TLS context */
struct tls *tls;
};
char *tls_ciphers;
char *tls_protocols;
struct statctx *udp_sc; /* singleton */
static void signal_handler(int, short, void *);
static void saddr_ntop(const struct sockaddr *, socklen_t, char *, size_t);
static void set_slice_timer(int);
static void print_tcp_header(void);
static void list_kvars(void);
static void check_kvar(const char *);
static char ** check_prepare_kvars(char *);
static void stats_prepare(struct statctx *);
static void summary_display(void);
static void tcp_stats_display(unsigned long long, long double, float,
struct statctx *, struct tcp_info *);
static void tcp_process_slice(int, short, void *);
static void tcp_server_handle_sc(int, short, void *);
static int timeout_tls(int, struct tls *, int (*)(struct tls *));
static void tcp_server_accept(int, short, void *);
static void server_init(struct addrinfo *);
static void client_handle_sc(int, short, void *);
static void client_init(struct addrinfo *, int, struct addrinfo *);
static int clock_gettime_tv(clockid_t, struct timeval *);
static void udp_server_handle_sc(int, short, void *);
static void udp_process_slice(int, short, void *);
#ifdef __OpenBSD__
static int map_tos(char *, int *);
#endif
static void quit(int, short, void *);
static void wrapup(int);
static int process_tls_opt(char *);
/*
* We account the mainstats here, that is the stats
* for all connections, all variables starting with slice
* are used to account information for the timeslice
* between each output. Peak variables record the highest
* between all slices so far.
*/
static struct {
struct timeval t_first; /* first connect / packet */
unsigned long long total_bytes; /* bytes since t_first */
unsigned long long n_slices; /* slices since start */
unsigned long long slice_bytes; /* bytes since slice reset */
long double peak_mbps; /* peak mbps so far */
long double floor_mbps; /* floor mbps so far */
long double mean_mbps; /* mean mbps so far */
long double nvariance_mbps; /* for online std dev */
int nconns; /* connected clients */
struct event timer; /* process timer */
const char *host; /* remote server for display */
} mainstats;
/* When adding variables, also add to tcp_stats_display() */
static const char *allowed_kvars[] = {
"last_ack_recv",
"last_ack_sent",
"last_data_recv",
"last_data_sent",
#ifdef __OpenBSD__
"max_sndwnd",
#endif
"options",
#ifdef __OpenBSD__
"rcv_adv",
#endif
"rcv_mss",
#ifdef __OpenBSD__
"rcv_nxt",
"rcv_ooopack",
#endif
"rcv_space",
#ifdef __OpenBSD__
"rcv_up",
#endif
"rcv_wscale",
#ifdef __OpenBSD__
"rfbuf_cnt",
"rfbuf_ts",
#endif
"rtt",
#ifdef __OpenBSD__
"rttmin",
#endif
"rttvar",
"snd_cwnd",
#ifdef __OpenBSD__
"snd_max",
#endif
"snd_mss",
#ifdef __OpenBSD__
"snd_nxt",
"snd_rexmitpack",
#endif
"snd_ssthresh",
#ifdef __OpenBSD__
"snd_una",
"snd_wl1",
"snd_wl2",
"snd_wnd",
"snd_wscale",
"snd_zerowin",
"so_rcv_sb_cc",
"so_rcv_sb_hiwat",
"so_rcv_sb_lowat",
"so_rcv_sb_wat",
"so_snd_sb_cc",
"so_snd_sb_hiwat",
"so_snd_sb_lowat",
"so_snd_sb_wat",
"ts_recent",
"ts_recent_age",
#endif
NULL
};
TAILQ_HEAD(, statctx) sc_queue;
static void
usage(void)
{
fprintf(stderr,
"usage: tcpbench -l\n"
" tcpbench [-46cDRUuv] [-B buf] [-b sourceaddr] [-k kvars] [-n connections]\n"
" [-p port] [-r interval] [-S space] [-T keyword]\n"
" [-t secs] [-V rtable] hostname\n"
" tcpbench -s [-46cDUuv] [-B buf] [-C certfile -K keyfile] [-k kvars] [-p port] [-r interval]\n"
" [-S space] [-T keyword] [-V rtable] [hostname]\n");
exit(1);
}
static void
signal_handler(int sig, short event, void *bula)
{
/*
* signal handler rules don't apply, libevent decouples for us
*/
switch (sig) {
#ifdef __OpenBSD__
case SIGINFO:
printf("\n");
wrapup(-1);
break;
#endif
case SIGINT:
printf("\n");
wrapup(0);
break; /* NOTREACHED */
case SIGTERM:
case SIGHUP:
warnx("Terminated by signal %d", sig);
wrapup(0);
break; /* NOTREACHED */
default:
errx(1, "unexpected signal %d", sig);
break; /* NOTREACHED */
}
}
static void
saddr_ntop(const struct sockaddr *addr, socklen_t alen, char *buf, size_t len)
{
char hbuf[NI_MAXHOST], pbuf[NI_MAXSERV];
int herr;
if (addr->sa_family == AF_UNIX) {
struct sockaddr_un *sun = (struct sockaddr_un *)addr;
snprintf(buf, len, "%s", sun->sun_path);
return;
}
if ((herr = getnameinfo(addr, alen, hbuf, sizeof(hbuf),
pbuf, sizeof(pbuf), NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
if (herr == EAI_SYSTEM)
err(1, "getnameinfo");
else
errx(1, "getnameinfo: %s", gai_strerror(herr));
}
snprintf(buf, len, "[%s]:%s", hbuf, pbuf);
}
static void
set_slice_timer(int on)
{
struct timeval tv;
if (ptb->rflag == 0)
return;
if (on) {
if (evtimer_pending(&mainstats.timer, NULL))
return;
/* XXX Is there a better way to do this ? */
tv.tv_sec = ptb->rflag / 1000;
tv.tv_usec = (ptb->rflag % 1000) * 1000;
evtimer_add(&mainstats.timer, &tv);
} else if (evtimer_pending(&mainstats.timer, NULL))
evtimer_del(&mainstats.timer);
}
static int
clock_gettime_tv(clockid_t clock_id, struct timeval *tv)
{
struct timespec ts;
if (clock_gettime(clock_id, &ts) == -1)
return (-1);
TIMESPEC_TO_TIMEVAL(tv, &ts);
return (0);
}
static void
print_tcp_header(void)
{
char **kv;
if (ptb->rflag == 0)
return;
printf("%12s %14s %12s %8s ", "elapsed_ms", "bytes", "mbps",
"bwidth");
for (kv = ptb->kvars; ptb->kvars != NULL && *kv != NULL; kv++)
printf("%s%s", kv != ptb->kvars ? "," : "", *kv);
printf("\n");
}
static void
check_kvar(const char *var)
{
u_int i;
for (i = 0; allowed_kvars[i] != NULL; i++)
if (strcmp(allowed_kvars[i], var) == 0)
return;
errx(1, "Unrecognised kvar: %s", var);
}
static void
list_kvars(void)
{
u_int i;
printf("Supported kernel variables:\n");
for (i = 0; allowed_kvars[i] != NULL; i++)
printf("\t%s\n", allowed_kvars[i]);
}
static char **
check_prepare_kvars(char *list)
{
char *item, **ret = NULL;
u_int n = 0;
while ((item = strsep(&list, ", \t\n")) != NULL) {
check_kvar(item);
if ((ret = reallocarray(ret, (++n + 1), sizeof(*ret))) == NULL)
err(1, "reallocarray(kvars)");
if ((ret[n - 1] = strdup(item)) == NULL)
err(1, "strdup");
ret[n] = NULL;
}
return (ret);
}
static void
stats_prepare(struct statctx *sc)
{
sc->buf = ptb->dummybuf;
sc->buflen = ptb->dummybuf_len;
if (clock_gettime_tv(CLOCK_MONOTONIC, &sc->t_start) == -1)
err(1, "clock_gettime_tv");
sc->t_last = sc->t_start;
if (!timerisset(&mainstats.t_first))
mainstats.t_first = sc->t_start;
}
static void
summary_display(void)
{
struct timeval t_cur, t_diff;
long double std_dev;
unsigned long long total_elapsed;
char *direction;
if (!ptb->sflag) {
direction = "sent";
printf("--- %s tcpbench statistics ---\n", mainstats.host);
} else {
direction = "received";
printf("--- tcpbench server statistics ---\n");
}
std_dev = sqrtl(mainstats.nvariance_mbps / mainstats.n_slices);
if (clock_gettime_tv(CLOCK_MONOTONIC, &t_cur) == -1)
err(1, "clock_gettime_tv");
timersub(&t_cur, &mainstats.t_first, &t_diff);
total_elapsed = t_diff.tv_sec * 1000 + t_diff.tv_usec / 1000;
printf("%llu bytes %s over %.3Lf seconds\n",
mainstats.total_bytes, direction, total_elapsed/1000.0L);
printf("bandwidth min/avg/max/std-dev = %.3Lf/%.3Lf/%.3Lf/%.3Lf Mbps\n",
mainstats.floor_mbps, mainstats.mean_mbps, mainstats.peak_mbps,
std_dev);
}
static void
tcp_stats_display(unsigned long long total_elapsed, long double mbps,
float bwperc, struct statctx *sc, struct tcp_info *tcpi)
{
int j;
printf("%12llu %14llu %12.3Lf %7.2f%% ", total_elapsed, sc->bytes,
mbps, bwperc);
if (ptb->kvars != NULL) {
for (j = 0; ptb->kvars[j] != NULL; j++) {
#define S(a) #a
#define P(b, v, f) \
if (strcmp(ptb->kvars[j], S(v)) == 0) { \
printf("%s"f, j > 0 ? "," : "", b->tcpi_##v); \
continue; \
}
P(tcpi, last_ack_recv, "%u")
P(tcpi, last_ack_sent, "%u")
P(tcpi, last_data_recv, "%u")
P(tcpi, last_data_sent, "%u")
#ifdef __OpenBSD__
P(tcpi, max_sndwnd, "%u")
#endif
P(tcpi, options, "%hhu")
#ifdef __OpenBSD__
P(tcpi, rcv_adv, "%u")
#endif
P(tcpi, rcv_mss, "%u")
#ifdef __OpenBSD__
P(tcpi, rcv_nxt, "%u")
P(tcpi, rcv_ooopack, "%u")
#endif
P(tcpi, rcv_space, "%u")
#ifdef __OpenBSD__
P(tcpi, rcv_up, "%u")
#endif
P(tcpi, rcv_wscale, "%hhu")
#ifdef __OpenBSD__
P(tcpi, rfbuf_cnt, "%u")
P(tcpi, rfbuf_ts, "%u")
#endif
P(tcpi, rtt, "%u")
#ifdef __OpenBSD__
P(tcpi, rttmin, "%u")
#endif
P(tcpi, rttvar, "%u")
P(tcpi, snd_cwnd, "%u")
#ifdef __OpenBSD__
P(tcpi, snd_max, "%u")
#endif
P(tcpi, snd_mss, "%u")
#ifdef __OpenBSD__
P(tcpi, snd_nxt, "%u")
P(tcpi, snd_rexmitpack, "%u")
#endif
P(tcpi, snd_ssthresh, "%u")
#ifdef __OpenBSD__
P(tcpi, snd_una, "%u")
P(tcpi, snd_wl1, "%u")
P(tcpi, snd_wl2, "%u")
P(tcpi, snd_wnd, "%u")
P(tcpi, snd_wscale, "%hhu")
P(tcpi, snd_zerowin, "%u")
P(tcpi, so_rcv_sb_cc, "%u")
P(tcpi, so_rcv_sb_hiwat, "%u")
P(tcpi, so_rcv_sb_lowat, "%u")
P(tcpi, so_rcv_sb_wat, "%u")
P(tcpi, so_snd_sb_cc, "%u")
P(tcpi, so_snd_sb_hiwat, "%u")
P(tcpi, so_snd_sb_lowat, "%u")
P(tcpi, so_snd_sb_wat, "%u")
P(tcpi, ts_recent, "%u")
P(tcpi, ts_recent_age, "%u")
#endif
#undef S
#undef P
}
}
printf("\n");
}
static void
tcp_process_slice(int fd, short event, void *bula)
{
unsigned long long total_elapsed, since_last;
long double mbps, old_mean_mbps, slice_mbps = 0;
float bwperc;
struct statctx *sc;
struct timeval t_cur, t_diff;
struct tcp_info tcpi;
socklen_t tcpilen;
if (TAILQ_EMPTY(&sc_queue))
return; /* don't pollute stats */
mainstats.n_slices++;
TAILQ_FOREACH(sc, &sc_queue, entry) {
if (clock_gettime_tv(CLOCK_MONOTONIC, &t_cur) == -1)
err(1, "clock_gettime_tv");
if (ptb->kvars != NULL) { /* process kernel stats */
tcpilen = sizeof(tcpi);
if (getsockopt(sc->fd, IPPROTO_TCP, TCP_INFO,
&tcpi, &tcpilen) == -1)
err(1, "get tcp_info");
}
timersub(&t_cur, &sc->t_start, &t_diff);
total_elapsed = t_diff.tv_sec * 1000 + t_diff.tv_usec / 1000;
timersub(&t_cur, &sc->t_last, &t_diff);
since_last = t_diff.tv_sec * 1000 + t_diff.tv_usec / 1000;
if (since_last == 0)
continue;
bwperc = (sc->bytes * 100.0) / mainstats.slice_bytes;
mbps = (sc->bytes * 8) / (since_last * 1000.0);
slice_mbps += mbps;
tcp_stats_display(total_elapsed, mbps, bwperc, sc, &tcpi);
sc->t_last = t_cur;
sc->bytes = 0;
}
/* process stats for this slice */
if (slice_mbps > mainstats.peak_mbps)
mainstats.peak_mbps = slice_mbps;
if (slice_mbps < mainstats.floor_mbps)
mainstats.floor_mbps = slice_mbps;
old_mean_mbps = mainstats.mean_mbps;
mainstats.mean_mbps += (slice_mbps - mainstats.mean_mbps) /
mainstats.n_slices;
/* "Welford's method" for online variance
* see Knuth, TAoCP Volume 2, 3rd edn., p232 */
mainstats.nvariance_mbps += (slice_mbps - old_mean_mbps) *
(slice_mbps - mainstats.mean_mbps);
printf("Conn: %3d Mbps: %12.3Lf Peak Mbps: %12.3Lf Avg Mbps: %12.3Lf\n",
mainstats.nconns, slice_mbps, mainstats.peak_mbps,
mainstats.nconns ? slice_mbps / mainstats.nconns : 0);
mainstats.slice_bytes = 0;
set_slice_timer(mainstats.nconns > 0);
}
static void
udp_process_slice(int fd, short event, void *bula)
{
unsigned long long total_elapsed, since_last, pps;
long double old_mean_mbps, slice_mbps;
struct timeval t_cur, t_diff;
mainstats.n_slices++;
if (clock_gettime_tv(CLOCK_MONOTONIC, &t_cur) == -1)
err(1, "clock_gettime_tv");
timersub(&t_cur, &udp_sc->t_start, &t_diff);
total_elapsed = t_diff.tv_sec * 1000 + t_diff.tv_usec / 1000;
timersub(&t_cur, &udp_sc->t_last, &t_diff);
since_last = t_diff.tv_sec * 1000 + t_diff.tv_usec / 1000;
if (since_last == 0)
return;
slice_mbps = (udp_sc->bytes * 8) / (since_last * 1000.0);
pps = (udp_sc->udp_slice_pkts * 1000) / since_last;
if (slice_mbps > mainstats.peak_mbps)
mainstats.peak_mbps = slice_mbps;
if (slice_mbps < mainstats.floor_mbps)
mainstats.floor_mbps = slice_mbps;
old_mean_mbps = mainstats.mean_mbps;
mainstats.mean_mbps += (slice_mbps - mainstats.mean_mbps) /
mainstats.n_slices;
/* "Welford's method" for online variance
* see Knuth, TAoCP Volume 2, 3rd edn., p232 */
mainstats.nvariance_mbps += (slice_mbps - old_mean_mbps) *
(slice_mbps - mainstats.mean_mbps);
printf("Elapsed: %11llu Mbps: %11.3Lf Peak Mbps: %11.3Lf %s PPS: %7llu\n",
total_elapsed, slice_mbps, mainstats.peak_mbps,
ptb->sflag ? "Rx" : "Tx", pps);
/* Clean up this slice time */
udp_sc->t_last = t_cur;
udp_sc->bytes = 0;
udp_sc->udp_slice_pkts = 0;
mainstats.slice_bytes = 0;
set_slice_timer(1);
}
static void
udp_server_handle_sc(int fd, short event, void *bula)
{
static int first_read = 1;
ssize_t n;
n = read(fd, ptb->dummybuf, ptb->dummybuf_len);
if (n == 0)
return;
else if (n == -1) {
if (errno != EINTR && errno != EWOULDBLOCK)
warn("fd %d read error", fd);
return;
}
if (ptb->vflag >= 3)
fprintf(stderr, "read: %zd bytes\n", n);
if (first_read) {
first_read = 0;
stats_prepare(udp_sc);
set_slice_timer(1);
}
/* Account packet */
udp_sc->udp_slice_pkts++;
udp_sc->bytes += n;
mainstats.slice_bytes += n;
mainstats.total_bytes += n;
}
static void
tcp_server_handle_sc(int fd, short event, void *v_sc)
{
struct statctx *sc = v_sc;
ssize_t n;
if (sc->tls)
n = tls_read(sc->tls, sc->buf, sc->buflen);
else
n = read(sc->fd, sc->buf, sc->buflen);
if (n == -1) {
if (sc->tls)
err(1, "tls_read: %s", tls_error(sc->tls));
if (errno != EINTR && errno != EWOULDBLOCK)
warn("fd %d read error", sc->fd);
return;
} else if (n == 0) {
if (ptb->vflag)
fprintf(stderr, "%8d closed by remote end\n", sc->fd);
TAILQ_REMOVE(&sc_queue, sc, entry);
event_del(&sc->ev);
close(sc->fd);
/* Some file descriptors are available again. */
if (evtimer_pending(&sc->tcp_ts->evt, NULL)) {
evtimer_del(&sc->tcp_ts->evt);
event_add(&sc->tcp_ts->ev, NULL);
}
free(sc);
mainstats.nconns--;
return;
}
if (ptb->vflag >= 3)
fprintf(stderr, "read: %zd bytes\n", n);
sc->bytes += n;
mainstats.slice_bytes += n;
mainstats.total_bytes += n;
}
static int
timeout_tls(int s, struct tls *tls_ctx, int (*func)(struct tls *))
{
struct pollfd pfd;
int ret;
while ((ret = func(tls_ctx)) != 0) {
if (ret == TLS_WANT_POLLIN)
pfd.events = POLLIN;
else if (ret == TLS_WANT_POLLOUT)
pfd.events = POLLOUT;
else
break;
pfd.fd = s;
if ((ret = poll(&pfd, 1, -1)) == 1)
continue;
else if (ret == 0) {
errno = ETIMEDOUT;
ret = -1;
break;
} else
err(1, "poll failed");
}
return ret;
}
static void
tcp_server_accept(int fd, short event, void *arg)
{
struct tcpservsock *ts = arg;
int sock;
struct statctx *sc;
struct sockaddr_storage ss;
socklen_t sslen;
char tmp[NI_MAXHOST + 2 + NI_MAXSERV];
static struct tls *tls = NULL;
if (ptb->tls_cfg && tls == NULL) {
tls = tls_server();
if (tls == NULL)
err(1, "Unable to create TLS context.");
if (tls_configure(tls, ptb->tls_cfg) == -1)
errx(1, "tls_configure: %s", tls_error(tls));
}
sslen = sizeof(ss);
event_add(&ts->ev, NULL);
if (event & EV_TIMEOUT)
return;
if ((sock = accept4(fd, (struct sockaddr *)&ss, &sslen, SOCK_NONBLOCK))
== -1) {
/*
* Pause accept if we are out of file descriptors, or
* libevent will haunt us here too.
*/
if (errno == ENFILE || errno == EMFILE) {
struct timeval evtpause = { 1, 0 };
event_del(&ts->ev);
evtimer_add(&ts->evt, &evtpause);
} else if (errno != EWOULDBLOCK && errno != EINTR &&
errno != ECONNABORTED)
warn("accept");
return;
}
saddr_ntop((struct sockaddr *)&ss, sslen,
tmp, sizeof(tmp));
if (ptb->Tflag != -1 && ss.ss_family == AF_INET) {
if (setsockopt(sock, IPPROTO_IP, IP_TOS,
&ptb->Tflag, sizeof(ptb->Tflag)))
err(1, "setsockopt IP_TOS");
}
if (ptb->Tflag != -1 && ss.ss_family == AF_INET6) {
if (setsockopt(sock, IPPROTO_IPV6, IPV6_TCLASS,
&ptb->Tflag, sizeof(ptb->Tflag)))
err(1, "setsockopt IPV6_TCLASS");
}
/* Alloc client structure and register reading callback */
if ((sc = calloc(1, sizeof(*sc))) == NULL)
err(1, "calloc");
sc->tcp_ts = ts;
sc->fd = sock;
stats_prepare(sc);
if (tls && tls_accept_socket(tls, &sc->tls, sc->fd) == -1)
err(1, "tls_accept_socket: %s", tls_error(tls));
event_set(&sc->ev, sc->fd, EV_READ | EV_PERSIST,
tcp_server_handle_sc, sc);
event_add(&sc->ev, NULL);
TAILQ_INSERT_TAIL(&sc_queue, sc, entry);
mainstats.nconns++;
if (mainstats.nconns == 1)
set_slice_timer(1);
if (ptb->vflag)
fprintf(stderr, "Accepted connection from %s, fd = %d\n",
tmp, sc->fd);
}
static void
server_init(struct addrinfo *aitop)
{
int sock, on = 1;
struct addrinfo *ai;
struct event *ev;
struct tcpservsock *ts;
nfds_t lnfds;
lnfds = 0;
for (ai = aitop; ai != NULL; ai = ai->ai_next) {
char tmp[NI_MAXHOST + 2 + NI_MAXSERV];
saddr_ntop(ai->ai_addr, ai->ai_addrlen, tmp, sizeof(tmp));
if (ptb->vflag)
fprintf(stderr, "Try to bind to %s\n", tmp);
if ((sock = socket(ai->ai_family, ai->ai_socktype,
ai->ai_protocol)) == -1) {
if (ai->ai_next == NULL)
err(1, "socket");
if (ptb->vflag)
warn("socket");
continue;
}
if (ptb->Dflag) {
if (setsockopt(sock, SOL_SOCKET, SO_DEBUG,
&ptb->Dflag, sizeof(ptb->Dflag)))
err(1, "setsockopt SO_DEBUG");
}
if (ptb->Tflag != -1 && ai->ai_family == AF_INET) {
if (setsockopt(sock, IPPROTO_IP, IP_TOS,
&ptb->Tflag, sizeof(ptb->Tflag)))
err(1, "setsockopt IP_TOS");
}
if (ptb->Tflag != -1 && ai->ai_family == AF_INET6) {
if (setsockopt(sock, IPPROTO_IPV6, IPV6_TCLASS,
&ptb->Tflag, sizeof(ptb->Tflag)))
err(1, "setsockopt IPV6_TCLASS");
}
#ifndef __OpenBSD__
if (ai->ai_family == AF_INET6) {
if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
&on, sizeof(on)) == -1)
warn("ipv6 only");
}
#endif
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
&on, sizeof(on)) == -1)
warn("reuse port");
if (bind(sock, ai->ai_addr, ai->ai_addrlen) != 0) {
if (ai->ai_next == NULL)
err(1, "bind");
if (ptb->vflag)
warn("bind");
close(sock);
continue;
}
if (ptb->Sflag) {
if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF,
&ptb->Sflag, sizeof(ptb->Sflag)) == -1)
warn("set receive socket buffer size");
}
if (TCP_MODE) {
if (listen(sock, 64) == -1) {
if (ai->ai_next == NULL)
err(1, "listen");
if (ptb->vflag)
warn("listen");
close(sock);
continue;
}
}
if (UDP_MODE) {
if ((ev = calloc(1, sizeof(*ev))) == NULL)
err(1, "calloc");
event_set(ev, sock, EV_READ | EV_PERSIST,
udp_server_handle_sc, NULL);
event_add(ev, NULL);
} else {
if ((ts = calloc(1, sizeof(*ts))) == NULL)
err(1, "calloc");
ts->fd = sock;
evtimer_set(&ts->evt, tcp_server_accept, ts);
event_set(&ts->ev, ts->fd, EV_READ,
tcp_server_accept, ts);
event_add(&ts->ev, NULL);
}
if (ptb->vflag >= 3)
fprintf(stderr, "bound to fd %d\n", sock);
lnfds++;
}
if (!ptb->Uflag)
freeaddrinfo(aitop);
if (lnfds == 0)
errx(1, "No working listen addresses found");
}
static void
client_handle_sc(int fd, short event, void *v_sc)
{
struct statctx *sc = v_sc;
ssize_t n;
size_t blen = sc->buflen;
if (ptb->Rflag)
blen = arc4random_uniform(blen) + 1;
if (sc->tls)
n = tls_write(sc->tls, sc->buf, blen);
else
n = write(sc->fd, sc->buf, blen);
if (n == -1) {
if (sc->tls)
warn("tls_write: %s", tls_error(sc->tls));
if (errno == EINTR || errno == EWOULDBLOCK ||
(UDP_MODE && errno == ENOBUFS))
return;
warn("write");
wrapup(1);
}
if (TCP_MODE && n == 0) {
fprintf(stderr, "Remote end closed connection");
wrapup(1);
}
if (ptb->vflag >= 3)
fprintf(stderr, "write: %zd bytes\n", n);
sc->bytes += n;
mainstats.slice_bytes += n;
mainstats.total_bytes += n;
if (UDP_MODE)
sc->udp_slice_pkts++;
}
static void
client_init(struct addrinfo *aitop, int nconn, struct addrinfo *aib)
{
struct statctx *sc;
struct addrinfo *ai;
int i, r, sock;
for (i = 0; i < nconn; i++) {
for (sock = -1, ai = aitop; ai != NULL; ai = ai->ai_next) {
char tmp[NI_MAXHOST + 2 + NI_MAXSERV];
saddr_ntop(ai->ai_addr, ai->ai_addrlen, tmp,
sizeof(tmp));
if (ptb->vflag && i == 0)
fprintf(stderr, "Trying %s\n", tmp);
if ((sock = socket(ai->ai_family, ai->ai_socktype,
ai->ai_protocol)) == -1) {
if (ai->ai_next == NULL)
err(1, "socket");
if (ptb->vflag)
warn("socket");
continue;
}
if (ptb->Dflag) {
if (setsockopt(sock, SOL_SOCKET, SO_DEBUG,
&ptb->Dflag, sizeof(ptb->Dflag)))
err(1, "setsockopt SO_DEBUG");
}
if (aib != NULL) {
saddr_ntop(aib->ai_addr, aib->ai_addrlen,
tmp, sizeof(tmp));
if (ptb->vflag)
fprintf(stderr,
"Try to bind to %s\n", tmp);
if (bind(sock, (struct sockaddr *)aib->ai_addr,
aib->ai_addrlen) == -1)
err(1, "bind");
}
if (ptb->Tflag != -1 && ai->ai_family == AF_INET) {
if (setsockopt(sock, IPPROTO_IP, IP_TOS,
&ptb->Tflag, sizeof(ptb->Tflag)))
err(1, "setsockopt IP_TOS");
}
if (ptb->Tflag != -1 && ai->ai_family == AF_INET6) {
if (setsockopt(sock, IPPROTO_IPV6, IPV6_TCLASS,
&ptb->Tflag, sizeof(ptb->Tflag)))
err(1, "setsockopt IPV6_TCLASS");
}
if (ptb->Sflag) {
if (setsockopt(sock, SOL_SOCKET, SO_SNDBUF,
&ptb->Sflag, sizeof(ptb->Sflag)) == -1)
warn("set send socket buffer size");
}
if (connect(sock, ai->ai_addr, ai->ai_addrlen) != 0) {
if (ai->ai_next == NULL)
err(1, "connect");
if (ptb->vflag)
warn("connect");
close(sock);
sock = -1;
continue;
}
break;
}
if (sock == -1)
errx(1, "No host found");
if ((r = fcntl(sock, F_GETFL)) == -1)
err(1, "fcntl(F_GETFL)");
r |= O_NONBLOCK;
if (fcntl(sock, F_SETFL, r) == -1)
err(1, "fcntl(F_SETFL, O_NONBLOCK)");
/* Alloc and prepare stats */