OpenBSD-4.6/usr.bin/tcpbench/tcpbench.c
/*
* Copyright (c) 2008 Damien Miller <djm@mindrot.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>
#include <sys/socketvar.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_fsm.h>
#include <netinet/in_pcb.h>
#include <netinet/tcp_var.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <limits.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <netdb.h>
#include <signal.h>
#include <err.h>
#include <fcntl.h>
#include <poll.h>
#include <kvm.h>
#include <nlist.h>
#define DEFAULT_PORT "12345"
#define DEFAULT_STATS_INTERVAL 1000 /* ms */
#define DEFAULT_BUF 256 * 1024
sig_atomic_t done = 0;
sig_atomic_t print_stats = 0;
struct statctx {
struct timeval t_start, t_last, t_cur;
unsigned long long bytes;
pid_t pid;
u_long tcbaddr;
kvm_t *kh;
char **kvars;
};
/* When adding variables, also add to stats_display() */
static const char *allowed_kvars[] = {
"inpcb.inp_flags",
"sockb.so_rcv.sb_cc",
"sockb.so_rcv.sb_hiwat",
"sockb.so_snd.sb_cc",
"sockb.so_snd.sb_hiwat",
"tcpcb.snd_una",
"tcpcb.snd_nxt",
"tcpcb.snd_wl1",
"tcpcb.snd_wl2",
"tcpcb.snd_wnd",
"tcpcb.rcv_wnd",
"tcpcb.rcv_nxt",
"tcpcb.rcv_adv",
"tcpcb.snd_max",
"tcpcb.snd_cwnd",
"tcpcb.snd_ssthresh",
"tcpcb.t_rcvtime",
"tcpcb.t_rtttime",
"tcpcb.t_rtseq",
"tcpcb.t_srtt",
"tcpcb.t_rttvar",
"tcpcb.t_rttmin",
"tcpcb.max_sndwnd",
"tcpcb.snd_scale",
"tcpcb.rcv_scale",
"tcpcb.last_ack_sent",
NULL
};
static void
exitsighand(int signo)
{
done = signo;
}
static void
alarmhandler(int signo)
{
print_stats = 1;
signal(signo, alarmhandler);
}
static void __dead
usage(void)
{
fprintf(stderr,
"usage: tcpbench -l\n"
" tcpbench [-v] [-B buf] [-k kvars] [-n connections]"
" [-p port] [-r rate]\n"
" [-S space] hostname\n"
" tcpbench -s [-v] [-B buf] [-k kvars] [-p port] [-r rate]"
" [-S space]\n");
exit(1);
}
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 ((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
kget(kvm_t *kh, u_long addr, void *buf, int size)
{
if (kvm_read(kh, addr, buf, size) != size)
errx(1, "kvm_read: %s", kvm_geterr(kh));
}
static u_long
kfind_tcb(kvm_t *kh, u_long ktcbtab, int sock, int vflag)
{
struct inpcbtable tcbtab;
struct inpcb *head, *next, *prev;
struct inpcb inpcb;
struct tcpcb tcpcb;
struct sockaddr_storage me, them;
socklen_t melen, themlen;
struct sockaddr_in *in4;
struct sockaddr_in6 *in6;
char tmp1[64], tmp2[64];
melen = themlen = sizeof(struct sockaddr_storage);
if (getsockname(sock, (struct sockaddr *)&me, &melen) == -1)
err(1, "getsockname");
if (getpeername(sock, (struct sockaddr *)&them, &themlen) == -1)
err(1, "getpeername");
if (me.ss_family != them.ss_family)
errx(1, "%s: me.ss_family != them.ss_family", __func__);
if (me.ss_family != AF_INET && me.ss_family != AF_INET6)
errx(1, "%s: unknown socket family", __func__);
if (vflag >= 2) {
saddr_ntop((struct sockaddr *)&me, me.ss_len,
tmp1, sizeof(tmp1));
saddr_ntop((struct sockaddr *)&them, them.ss_len,
tmp2, sizeof(tmp2));
fprintf(stderr, "Our socket local %s remote %s\n", tmp1, tmp2);
}
if (vflag >= 2)
fprintf(stderr, "Using PCB table at %lu\n", ktcbtab);
kget(kh, ktcbtab, &tcbtab, sizeof(tcbtab));
prev = head = (struct inpcb *)&CIRCLEQ_FIRST(
&((struct inpcbtable *)ktcbtab)->inpt_queue);
next = CIRCLEQ_FIRST(&tcbtab.inpt_queue);
if (vflag >= 2)
fprintf(stderr, "PCB head at %p\n", head);
while (next != head) {
if (vflag >= 2)
fprintf(stderr, "Checking PCB %p\n", next);
kget(kh, (u_long)next, &inpcb, sizeof(inpcb));
if (CIRCLEQ_PREV(&inpcb, inp_queue) != prev)
errx(1, "pcb prev pointer insane");
prev = next;
next = CIRCLEQ_NEXT(&inpcb, inp_queue);
if (me.ss_family == AF_INET) {
if ((inpcb.inp_flags & INP_IPV6) != 0) {
if (vflag >= 2)
fprintf(stderr, "Skip: INP_IPV6");
continue;
}
if (vflag >= 2) {
inet_ntop(AF_INET, &inpcb.inp_laddr,
tmp1, sizeof(tmp1));
inet_ntop(AF_INET, &inpcb.inp_faddr,
tmp2, sizeof(tmp2));
fprintf(stderr, "PCB %p local: [%s]:%d "
"remote: [%s]:%d\n", prev,
tmp1, inpcb.inp_lport,
tmp2, inpcb.inp_fport);
}
in4 = (struct sockaddr_in *)&me;
if (memcmp(&in4->sin_addr, &inpcb.inp_laddr,
sizeof(struct in_addr)) != 0 ||
in4->sin_port != inpcb.inp_lport)
continue;
in4 = (struct sockaddr_in *)&them;
if (memcmp(&in4->sin_addr, &inpcb.inp_faddr,
sizeof(struct in_addr)) != 0 ||
in4->sin_port != inpcb.inp_fport)
continue;
} else {
if ((inpcb.inp_flags & INP_IPV6) == 0)
continue;
if (vflag >= 2) {
inet_ntop(AF_INET6, &inpcb.inp_laddr6,
tmp1, sizeof(tmp1));
inet_ntop(AF_INET6, &inpcb.inp_faddr6,
tmp2, sizeof(tmp2));
fprintf(stderr, "PCB %p local: [%s]:%d "
"remote: [%s]:%d\n", prev,
tmp1, inpcb.inp_lport,
tmp2, inpcb.inp_fport);
}
in6 = (struct sockaddr_in6 *)&me;
if (memcmp(&in6->sin6_addr, &inpcb.inp_laddr6,
sizeof(struct in6_addr)) != 0 ||
in6->sin6_port != inpcb.inp_lport)
continue;
in6 = (struct sockaddr_in6 *)&them;
if (memcmp(&in6->sin6_addr, &inpcb.inp_faddr6,
sizeof(struct in6_addr)) != 0 ||
in6->sin6_port != inpcb.inp_fport)
continue;
}
kget(kh, (u_long)inpcb.inp_ppcb, &tcpcb, sizeof(tcpcb));
if (tcpcb.t_state != TCPS_ESTABLISHED) {
if (vflag >= 2)
fprintf(stderr, "Not established\n");
continue;
}
if (vflag >= 2)
fprintf(stderr, "Found PCB at %p\n", prev);
return (u_long)prev;
}
errx(1, "No matching PCB found");
}
static void
kupdate_stats(kvm_t *kh, u_long tcbaddr,
struct inpcb *inpcb, struct tcpcb *tcpcb, struct socket *sockb)
{
kget(kh, tcbaddr, inpcb, sizeof(*inpcb));
kget(kh, (u_long)inpcb->inp_ppcb, tcpcb, sizeof(*tcpcb));
kget(kh, (u_long)inpcb->inp_socket, sockb, sizeof(*sockb));
}
static void
check_kvar(const char *var)
{
size_t 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)
{
size_t i;
fprintf(stderr, "Supported kernel variables:\n");
for (i = 0; allowed_kvars[i] != NULL; i++)
fprintf(stderr, "\t%s\n", allowed_kvars[i]);
}
static char **
check_prepare_kvars(char *list)
{
char *item, **ret = NULL;
size_t n = 0;
while ((item = strsep(&list, ", \t\n")) != NULL) {
check_kvar(item);
if ((ret = realloc(ret, sizeof(*ret) * (++n + 1))) == NULL)
errx(1, "realloc(kvars)");
if ((ret[n - 1] = strdup(item)) == NULL)
errx(1, "strdup");
ret[n] = NULL;
}
return ret;
}
static void
stats_prepare(struct statctx *sc, int fd, kvm_t *kh, u_long ktcbtab,
int rflag, int vflag, char **kflag)
{
struct itimerval itv;
int i;
if (rflag <= 0)
return;
sc->kh = kh;
sc->kvars = kflag;
if (kflag)
sc->tcbaddr = kfind_tcb(kh, ktcbtab, fd, vflag);
gettimeofday(&sc->t_start, NULL);
sc->t_last = sc->t_start;
signal(SIGALRM, alarmhandler);
itv.it_interval.tv_sec = rflag / 1000;
itv.it_interval.tv_usec = (rflag % 1000) * 1000;
itv.it_value = itv.it_interval;
setitimer(ITIMER_REAL, &itv, NULL);
sc->bytes = 0;
sc->pid = getpid();
printf("%8s %12s %14s %12s ", "pid", "elapsed_ms", "bytes", "Mbps");
if (sc->kvars != NULL) {
for (i = 0; sc->kvars[i] != NULL; i++)
printf("%s%s", i > 0 ? "," : "", sc->kvars[i]);
}
printf("\n");
fflush(stdout);
}
static void
stats_update(struct statctx *sc, ssize_t n)
{
sc->bytes += n;
}
static void
stats_display(struct statctx *sc)
{
struct timeval t_diff;
unsigned long long total_elapsed, since_last;
size_t i;
struct inpcb inpcb;
struct tcpcb tcpcb;
struct socket sockb;
gettimeofday(&sc->t_cur, NULL);
timersub(&sc->t_cur, &sc->t_start, &t_diff);
total_elapsed = t_diff.tv_sec * 1000 + t_diff.tv_usec / 1000;
timersub(&sc->t_cur, &sc->t_last, &t_diff);
since_last = t_diff.tv_sec * 1000 + t_diff.tv_usec / 1000;
printf("%8ld %12llu %14llu %12.3Lf ", (long)sc->pid,
total_elapsed, sc->bytes,
(long double)(sc->bytes * 8) / (since_last * 1000.0));
sc->t_last = sc->t_cur;
sc->bytes = 0;
if (sc->kvars != NULL) {
kupdate_stats(sc->kh, sc->tcbaddr, &inpcb, &tcpcb, &sockb);
for (i = 0; sc->kvars[i] != NULL; i++) {
#define P(v, f) \
if (strcmp(sc->kvars[i], #v) == 0) { \
printf("%s"f, i > 0 ? "," : "", v); \
continue; \
}
P(inpcb.inp_flags, "0x%08x")
P(sockb.so_rcv.sb_cc, "%lu")
P(sockb.so_rcv.sb_hiwat, "%lu")
P(sockb.so_snd.sb_cc, "%lu")
P(sockb.so_snd.sb_hiwat, "%lu")
P(tcpcb.snd_una, "%u")
P(tcpcb.snd_nxt, "%u")
P(tcpcb.snd_wl1, "%u")
P(tcpcb.snd_wl2, "%u")
P(tcpcb.snd_wnd, "%lu")
P(tcpcb.rcv_wnd, "%lu")
P(tcpcb.rcv_nxt, "%u")
P(tcpcb.rcv_adv, "%u")
P(tcpcb.snd_max, "%u")
P(tcpcb.snd_cwnd, "%lu")
P(tcpcb.snd_ssthresh, "%lu")
P(tcpcb.t_rcvtime, "%u")
P(tcpcb.t_rtttime, "%u")
P(tcpcb.t_rtseq, "%u")
P(tcpcb.t_srtt, "%hu")
P(tcpcb.t_rttvar, "%hu")
P(tcpcb.t_rttmin, "%hu")
P(tcpcb.max_sndwnd, "%lu")
P(tcpcb.snd_scale, "%u")
P(tcpcb.rcv_scale, "%u")
P(tcpcb.last_ack_sent, "%u")
#undef P
}
}
printf("\n");
fflush(stdout);
}
static void
stats_finish(struct statctx *sc)
{
struct itimerval itv;
signal(SIGALRM, SIG_DFL);
bzero(&itv, sizeof(itv));
setitimer(ITIMER_REAL, &itv, NULL);
}
static void __dead
handle_connection(kvm_t *kvmh, u_long ktcbtab, int sock, int vflag,
int rflag, char **kflag, int Bflag)
{
char *buf;
struct pollfd pfd;
ssize_t n;
int r;
struct statctx sc;
if ((buf = malloc(Bflag)) == NULL)
err(1, "malloc");
if ((r = fcntl(sock, F_GETFL, 0)) == -1)
err(1, "fcntl(F_GETFL)");
r |= O_NONBLOCK;
if (fcntl(sock, F_SETFL, r) == -1)
err(1, "fcntl(F_SETFL, O_NONBLOCK)");
signal(SIGINT, exitsighand);
signal(SIGTERM, exitsighand);
signal(SIGHUP, exitsighand);
signal(SIGPIPE, SIG_IGN);
bzero(&pfd, sizeof(pfd));
pfd.fd = sock;
pfd.events = POLLIN;
stats_prepare(&sc, sock, kvmh, ktcbtab, rflag, vflag, kflag);
while (!done) {
if (print_stats) {
stats_display(&sc);
print_stats = 0;
}
if (poll(&pfd, 1, INFTIM) == -1) {
if (errno == EINTR)
continue;
err(1, "poll");
}
if ((n = read(pfd.fd, buf, Bflag)) == -1) {
if (errno == EINTR || errno == EAGAIN)
continue;
err(1, "read");
}
if (n == 0) {
fprintf(stderr, "%8ld closed by remote end\n",
(long)getpid());
done = -1;
break;
}
if (vflag >= 3)
fprintf(stderr, "read: %zd bytes\n", n);
stats_update(&sc, n);
}
stats_finish(&sc);
free(buf);
close(sock);
exit(1);
}
static void __dead
serverloop(kvm_t *kvmh, u_long ktcbtab, struct addrinfo *aitop,
int vflag, int rflag, char **kflag, int Sflag, int Bflag)
{
char tmp[128];
int r, sock, client_id, on = 1;
struct addrinfo *ai;
struct pollfd *pfd;
struct sockaddr_storage ss;
socklen_t sslen;
size_t nfds, i, j;
pfd = NULL;
nfds = 0;
for (ai = aitop; ai != NULL; ai = ai->ai_next) {
saddr_ntop(ai->ai_addr, ai->ai_addrlen, tmp, sizeof(tmp));
if (vflag)
fprintf(stderr, "Try listen on %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 (vflag)
warn("socket");
continue;
}
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 (vflag)
warn("bind");
close(sock);
continue;
}
if (Sflag) {
if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF,
&Sflag, sizeof(Sflag)) == -1)
warn("set TCP receive buffer size");
}
if (listen(sock, 64) == -1) {
if (ai->ai_next == NULL)
err(1, "listen");
if (vflag)
warn("listen");
close(sock);
continue;
}
if (nfds > 128)
break;
if ((pfd = realloc(pfd, ++nfds * sizeof(*pfd))) == NULL)
errx(1, "realloc(pfd * %zu)", nfds);
pfd[nfds - 1].fd = sock;
pfd[nfds - 1].events = POLLIN;
}
freeaddrinfo(aitop);
if (nfds == 0)
errx(1, "No working listen addresses found");
signal(SIGINT, exitsighand);
signal(SIGTERM, exitsighand);
signal(SIGHUP, exitsighand);
signal(SIGPIPE, SIG_IGN);
signal(SIGCHLD, SIG_IGN);
if (setpgid(0, 0) == -1)
err(1, "setpgid");
client_id = 0;
while (!done) {
if ((r = poll(pfd, nfds, INFTIM)) == -1) {
if (errno == EINTR)
continue;
warn("poll");
break;
}
if (vflag >= 3)
fprintf(stderr, "poll: %d\n", r);
for (i = 0 ; r > 0 && i < nfds; i++) {
if ((pfd[i].revents & POLLIN) == 0)
continue;
if (vflag >= 3)
fprintf(stderr, "fd %d active\n", pfd[i].fd);
r--;
sslen = sizeof(ss);
if ((sock = accept(pfd[i].fd, (struct sockaddr *)&ss,
&sslen)) == -1) {
if (errno == EINTR)
continue;
warn("accept");
break;
}
saddr_ntop((struct sockaddr *)&ss, sslen,
tmp, sizeof(tmp));
if (vflag)
fprintf(stderr, "Accepted connection %d from "
"%s, fd = %d\n", client_id++, tmp, sock);
switch (fork()) {
case -1:
warn("fork");
done = -1;
break;
case 0:
for (j = 0; j < nfds; j++)
if (j != i)
close(pfd[j].fd);
handle_connection(kvmh, ktcbtab, sock,
vflag, rflag, kflag, Bflag);
/* NOTREACHED */
_exit(1);
default:
close(sock);
break;
}
if (done == -1)
break;
}
}
for (i = 0; i < nfds; i++)
close(pfd[i].fd);
if (done > 0)
warnx("Terminated by signal %d", done);
signal(SIGTERM, SIG_IGN);
killpg(0, SIGTERM);
exit(1);
}
static void __dead
clientloop(kvm_t *kvmh, u_long ktcbtab, const char *host, const char *port,
int vflag, int rflag, char **kflag, int Sflag, int Bflag, int nconn)
{
char tmp[128];
char *buf;
int r, sock, herr;
struct addrinfo *aitop, *ai, hints;
struct pollfd *pfd;
ssize_t n;
struct statctx sc;
u_int i, scnt = 0;
if ((buf = malloc(Bflag)) == NULL)
err(1, "malloc");
if ((pfd = calloc(nconn, sizeof(struct pollfd))) == NULL)
err(1, "clientloop pfd calloc");
for (i = 0; i < nconn; i++) {
bzero(&hints, sizeof(hints));
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = 0;
if ((herr = getaddrinfo(host, port, &hints, &aitop)) != 0) {
if (herr == EAI_SYSTEM)
err(1, "getaddrinfo");
else
errx(1, "c getaddrinfo: %s", gai_strerror(herr));
}
for (sock = -1, ai = aitop; ai != NULL; ai = ai->ai_next) {
saddr_ntop(ai->ai_addr, ai->ai_addrlen, tmp,
sizeof(tmp));
if (vflag && scnt == 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 (vflag)
warn("socket");
continue;
}
if (Sflag) {
if (setsockopt(sock, SOL_SOCKET, SO_SNDBUF,
&Sflag, sizeof(Sflag)) == -1)
warn("set TCP send buffer size");
}
if (connect(sock, ai->ai_addr, ai->ai_addrlen) != 0) {
if (ai->ai_next == NULL)
err(1, "connect");
if (vflag)
warn("connect");
close(sock);
sock = -1;
continue;
}
break;
}
freeaddrinfo(aitop);
if (sock == -1)
errx(1, "No host found");
if ((r = fcntl(sock, F_GETFL, 0)) == -1)
err(1, "fcntl(F_GETFL)");
r |= O_NONBLOCK;
if (fcntl(sock, F_SETFL, r) == -1)
err(1, "fcntl(F_SETFL, O_NONBLOCK)");
pfd[i].fd = sock;
pfd[i].events = POLLOUT;
scnt++;
}
if (vflag && scnt > 1)
fprintf(stderr, "%u connections established\n", scnt);
arc4random_buf(buf, Bflag);
signal(SIGINT, exitsighand);
signal(SIGTERM, exitsighand);
signal(SIGHUP, exitsighand);
signal(SIGPIPE, SIG_IGN);
stats_prepare(&sc, sock, kvmh, ktcbtab, rflag, vflag, kflag);
while (!done) {
if (print_stats) {
stats_display(&sc);
print_stats = 0;
}
if (poll(pfd, nconn, INFTIM) == -1) {
if (errno == EINTR)
continue;
err(1, "poll");
}
for (i = 0; i < nconn; i++) {
if (pfd[i].revents & POLLOUT) {
if ((n = write(pfd[i].fd, buf, Bflag)) == -1) {
if (errno == EINTR || errno == EAGAIN)
continue;
err(1, "write");
}
if (n == 0) {
warnx("Remote end closed connection");
done = -1;
break;
}
if (vflag >= 3)
fprintf(stderr, "write: %zd bytes\n",
n);
stats_update(&sc, n);
}
}
}
stats_finish(&sc);
if (done > 0)
warnx("Terminated by signal %d", done);
free(buf);
close(sock);
exit(0);
}
static void
drop_gid(void)
{
gid_t gid;
gid = getgid();
if (setresgid(gid, gid, gid) == -1)
err(1, "setresgid");
}
int
main(int argc, char **argv)
{
extern int optind;
extern char *optarg;
char kerr[_POSIX2_LINE_MAX], *tmp;
const char *errstr;
int ch, herr;
struct addrinfo *aitop, hints;
kvm_t *kvmh = NULL;
const char *host = NULL, *port = DEFAULT_PORT;
char **kflag = NULL;
int sflag = 0, vflag = 0, rflag = DEFAULT_STATS_INTERVAL, Sflag = 0;
int Bflag = DEFAULT_BUF;
int nconn = 1;
struct nlist nl[] = { { "_tcbtable" }, { "" } };
while ((ch = getopt(argc, argv, "B:hlk:n:p:r:sS:v")) != -1) {
switch (ch) {
case 'l':
list_kvars();
exit(0);
case 'k':
if ((tmp = strdup(optarg)) == NULL)
errx(1, "strdup");
kflag = check_prepare_kvars(tmp);
free(tmp);
break;
case 'r':
rflag = strtonum(optarg, 0, 60 * 60 * 24 * 1000,
&errstr);
if (errstr != NULL)
errx(1, "statistics interval is %s: %s",
errstr, optarg);
break;
case 'p':
port = optarg;
break;
case 's':
sflag = 1;
break;
case 'S':
Sflag = strtonum(optarg, 0, 1024*1024*1024,
&errstr);
if (errstr != NULL)
errx(1, "receive space interval is %s: %s",
errstr, optarg);
break;
case 'B':
Bflag = strtonum(optarg, 0, 1024*1024*1024,
&errstr);
if (errstr != NULL)
errx(1, "read/write buffer size is %s: %s",
errstr, optarg);
break;
case 'v':
vflag++;
break;
case 'n':
nconn = strtonum(optarg, 0, 65535, &errstr);
if (errstr != NULL)
errx(1, "number of connections is %s: %s",
errstr, optarg);
break;
case 'h':
default:
usage();
}
}
argv += optind;
argc -= optind;
if (argc != (sflag ? 0 : 1))
usage();
if (kflag != NULL && nconn > 1)
errx(1, "-k currently only works with a single tcp connection");
if (!sflag)
host = argv[0];
if (sflag) {
bzero(&hints, sizeof(hints));
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
if ((herr = getaddrinfo(host, port, &hints, &aitop)) != 0) {
if (herr == EAI_SYSTEM)
err(1, "getaddrinfo");
else
errx(1, "s getaddrinfo: %s", gai_strerror(herr));
}
}
if (kflag) {
if ((kvmh = kvm_openfiles(NULL, NULL, NULL,
O_RDONLY, kerr)) == NULL)
errx(1, "kvm_open: %s", kerr);
drop_gid();
if (kvm_nlist(kvmh, nl) < 0 || nl[0].n_type == 0)
errx(1, "kvm: no namelist");
} else
drop_gid();
if (sflag)
serverloop(kvmh, nl[0].n_value, aitop, vflag, rflag, kflag,
Sflag, Bflag);
else
clientloop(kvmh, nl[0].n_value, host, port, vflag, rflag, kflag,
Sflag, Bflag, nconn);
return 0;
}