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1.1 djm 1: /*
2: * Copyright (c) 2008 Damien Miller <djm@mindrot.org>
3: *
4: * Permission to use, copy, modify, and distribute this software for any
5: * purpose with or without fee is hereby granted, provided that the above
6: * copyright notice and this permission notice appear in all copies.
7: *
8: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15: */
16:
17: #include <sys/types.h>
18: #include <sys/time.h>
19: #include <sys/socket.h>
20: #include <sys/socketvar.h>
1.11 claudio 21: #include <sys/resource.h>
1.1 djm 22:
23: #include <net/route.h>
24:
25: #include <netinet/in.h>
26: #include <netinet/in_systm.h>
27: #include <netinet/ip.h>
28: #include <netinet/tcp.h>
29: #include <netinet/tcp_timer.h>
30: #include <netinet/tcp_fsm.h>
31: #include <netinet/in_pcb.h>
32: #include <netinet/tcp_var.h>
33:
34: #include <arpa/inet.h>
35:
36: #include <unistd.h>
37: #include <limits.h>
38: #include <stdlib.h>
39: #include <stdio.h>
40: #include <string.h>
41: #include <errno.h>
42: #include <netdb.h>
43: #include <signal.h>
44: #include <err.h>
45: #include <fcntl.h>
46: #include <poll.h>
47:
48: #include <kvm.h>
49: #include <nlist.h>
50:
1.11 claudio 51: #define DEFAULT_PORT "12345"
52: #define DEFAULT_STATS_INTERVAL 1000 /* ms */
53: #define DEFAULT_BUF 256 * 1024
54: #define MAX_FD 1024
1.1 djm 55:
56: sig_atomic_t done = 0;
1.11 claudio 57: sig_atomic_t proc_slice = 0;
1.1 djm 58:
1.11 claudio 59: static u_int rdomain;
60: static char **kflag;
61: static size_t Bflag;
62: static int Sflag;
63: static int rflag;
64: static int sflag;
65: static int vflag;
1.9 claudio 66:
1.11 claudio 67: /* stats for a single connection */
1.1 djm 68: struct statctx {
1.11 claudio 69: struct timeval t_start, t_last;
1.1 djm 70: unsigned long long bytes;
71: u_long tcbaddr;
1.11 claudio 72: char **kvars;
1.1 djm 73: kvm_t *kh;
74: };
75:
1.11 claudio 76: /*
77: * We account the mainstats here, that is the stats
78: * for all connections, all variables starting with slice
79: * are used to account information for the timeslice
80: * between each output. Peak variables record the highest
81: * between all slices so far.
82: */
83: static struct {
84: unsigned long long slice_bytes; /* bytes for last slice */
85: struct timeval t_start; /* when we started counting */
86: long double peak_mbps; /* peak mbps so far */
87: int nconns; /* connected clients */
88: } mainstats;
89:
1.1 djm 90: /* When adding variables, also add to stats_display() */
91: static const char *allowed_kvars[] = {
92: "inpcb.inp_flags",
93: "sockb.so_rcv.sb_cc",
94: "sockb.so_rcv.sb_hiwat",
95: "sockb.so_snd.sb_cc",
96: "sockb.so_snd.sb_hiwat",
97: "tcpcb.snd_una",
98: "tcpcb.snd_nxt",
99: "tcpcb.snd_wl1",
100: "tcpcb.snd_wl2",
101: "tcpcb.snd_wnd",
102: "tcpcb.rcv_wnd",
103: "tcpcb.rcv_nxt",
104: "tcpcb.rcv_adv",
105: "tcpcb.snd_max",
106: "tcpcb.snd_cwnd",
107: "tcpcb.snd_ssthresh",
108: "tcpcb.t_rcvtime",
109: "tcpcb.t_rtttime",
110: "tcpcb.t_rtseq",
111: "tcpcb.t_srtt",
112: "tcpcb.t_rttvar",
113: "tcpcb.t_rttmin",
114: "tcpcb.max_sndwnd",
115: "tcpcb.snd_scale",
116: "tcpcb.rcv_scale",
117: "tcpcb.last_ack_sent",
118: NULL
119: };
120:
121: static void
122: exitsighand(int signo)
123: {
124: done = signo;
125: }
126:
127: static void
128: alarmhandler(int signo)
129: {
1.11 claudio 130: proc_slice = 1;
1.1 djm 131: signal(signo, alarmhandler);
132: }
133:
134: static void __dead
135: usage(void)
136: {
137: fprintf(stderr,
1.6 jmc 138: "usage: tcpbench -l\n"
1.15 ! sthen 139: " tcpbench [-v] [-B buf] [-k kvars] [-n connections] [-p port]\n"
! 140: " [-r rate] [-S space] [-V rdomain] hostname\n"
! 141: " tcpbench -s [-v] [-B buf] [-k kvars] [-p port]\n"
! 142: " [-r rate] [-S space] [-V rdomain]\n");
1.1 djm 143: exit(1);
144: }
145:
146: static void
147: saddr_ntop(const struct sockaddr *addr, socklen_t alen, char *buf, size_t len)
148: {
149: char hbuf[NI_MAXHOST], pbuf[NI_MAXSERV];
150: int herr;
151:
1.3 djm 152: if ((herr = getnameinfo(addr, alen, hbuf, sizeof(hbuf),
153: pbuf, sizeof(pbuf), NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
1.1 djm 154: if (herr == EAI_SYSTEM)
155: err(1, "getnameinfo");
156: else
157: errx(1, "getnameinfo: %s", gai_strerror(herr));
158: }
159: snprintf(buf, len, "[%s]:%s", hbuf, pbuf);
160: }
161:
162: static void
1.11 claudio 163: set_timer(int toggle)
164: {
165: struct itimerval itv;
166:
167: if (rflag <= 0)
168: return;
169:
170: if (toggle) {
171: itv.it_interval.tv_sec = rflag / 1000;
172: itv.it_interval.tv_usec = (rflag % 1000) * 1000;
173: itv.it_value = itv.it_interval;
174: }
175: else
176: bzero(&itv, sizeof(itv));
177:
178: setitimer(ITIMER_REAL, &itv, NULL);
179: }
180:
181: static void
182: print_header(void)
183: {
184: char **kv;
185:
186: printf("%12s %14s %12s %8s ", "elapsed_ms", "bytes", "mbps",
187: "bwidth");
188:
189: for (kv = kflag; kflag != NULL && *kv != NULL; kv++)
190: printf("%s%s", kv != kflag ? "," : "", *kv);
191:
192: printf("\n");
193: }
194:
195: static void
1.1 djm 196: kget(kvm_t *kh, u_long addr, void *buf, int size)
197: {
198: if (kvm_read(kh, addr, buf, size) != size)
199: errx(1, "kvm_read: %s", kvm_geterr(kh));
200: }
201:
202: static u_long
1.11 claudio 203: kfind_tcb(kvm_t *kh, u_long ktcbtab, int sock)
1.1 djm 204: {
205: struct inpcbtable tcbtab;
206: struct inpcb *head, *next, *prev;
207: struct inpcb inpcb;
208: struct tcpcb tcpcb;
209:
210: struct sockaddr_storage me, them;
211: socklen_t melen, themlen;
212: struct sockaddr_in *in4;
213: struct sockaddr_in6 *in6;
214: char tmp1[64], tmp2[64];
1.11 claudio 215: int nretry;
1.1 djm 216:
1.11 claudio 217: nretry = 10;
1.1 djm 218: melen = themlen = sizeof(struct sockaddr_storage);
219: if (getsockname(sock, (struct sockaddr *)&me, &melen) == -1)
220: err(1, "getsockname");
221: if (getpeername(sock, (struct sockaddr *)&them, &themlen) == -1)
222: err(1, "getpeername");
223: if (me.ss_family != them.ss_family)
224: errx(1, "%s: me.ss_family != them.ss_family", __func__);
225: if (me.ss_family != AF_INET && me.ss_family != AF_INET6)
226: errx(1, "%s: unknown socket family", __func__);
227: if (vflag >= 2) {
228: saddr_ntop((struct sockaddr *)&me, me.ss_len,
229: tmp1, sizeof(tmp1));
230: saddr_ntop((struct sockaddr *)&them, them.ss_len,
231: tmp2, sizeof(tmp2));
232: fprintf(stderr, "Our socket local %s remote %s\n", tmp1, tmp2);
233: }
234: if (vflag >= 2)
235: fprintf(stderr, "Using PCB table at %lu\n", ktcbtab);
1.11 claudio 236: retry:
1.1 djm 237: kget(kh, ktcbtab, &tcbtab, sizeof(tcbtab));
238: prev = head = (struct inpcb *)&CIRCLEQ_FIRST(
239: &((struct inpcbtable *)ktcbtab)->inpt_queue);
240: next = CIRCLEQ_FIRST(&tcbtab.inpt_queue);
241:
242: if (vflag >= 2)
243: fprintf(stderr, "PCB head at %p\n", head);
244: while (next != head) {
245: if (vflag >= 2)
246: fprintf(stderr, "Checking PCB %p\n", next);
247: kget(kh, (u_long)next, &inpcb, sizeof(inpcb));
1.11 claudio 248: if (CIRCLEQ_PREV(&inpcb, inp_queue) != prev) {
249: if (nretry--) {
250: warnx("pcb prev pointer insane");
251: goto retry;
252: }
253: else
254: errx(1, "pcb prev pointer insane,"
255: " all attempts exausted");
256: }
1.1 djm 257: prev = next;
258: next = CIRCLEQ_NEXT(&inpcb, inp_queue);
259:
260: if (me.ss_family == AF_INET) {
261: if ((inpcb.inp_flags & INP_IPV6) != 0) {
262: if (vflag >= 2)
263: fprintf(stderr, "Skip: INP_IPV6");
264: continue;
265: }
266: if (vflag >= 2) {
267: inet_ntop(AF_INET, &inpcb.inp_laddr,
268: tmp1, sizeof(tmp1));
269: inet_ntop(AF_INET, &inpcb.inp_faddr,
270: tmp2, sizeof(tmp2));
271: fprintf(stderr, "PCB %p local: [%s]:%d "
272: "remote: [%s]:%d\n", prev,
273: tmp1, inpcb.inp_lport,
274: tmp2, inpcb.inp_fport);
275: }
276: in4 = (struct sockaddr_in *)&me;
277: if (memcmp(&in4->sin_addr, &inpcb.inp_laddr,
278: sizeof(struct in_addr)) != 0 ||
279: in4->sin_port != inpcb.inp_lport)
280: continue;
281: in4 = (struct sockaddr_in *)&them;
282: if (memcmp(&in4->sin_addr, &inpcb.inp_faddr,
283: sizeof(struct in_addr)) != 0 ||
284: in4->sin_port != inpcb.inp_fport)
285: continue;
286: } else {
287: if ((inpcb.inp_flags & INP_IPV6) == 0)
288: continue;
289: if (vflag >= 2) {
290: inet_ntop(AF_INET6, &inpcb.inp_laddr6,
291: tmp1, sizeof(tmp1));
292: inet_ntop(AF_INET6, &inpcb.inp_faddr6,
293: tmp2, sizeof(tmp2));
294: fprintf(stderr, "PCB %p local: [%s]:%d "
295: "remote: [%s]:%d\n", prev,
296: tmp1, inpcb.inp_lport,
297: tmp2, inpcb.inp_fport);
298: }
299: in6 = (struct sockaddr_in6 *)&me;
300: if (memcmp(&in6->sin6_addr, &inpcb.inp_laddr6,
301: sizeof(struct in6_addr)) != 0 ||
302: in6->sin6_port != inpcb.inp_lport)
303: continue;
304: in6 = (struct sockaddr_in6 *)&them;
305: if (memcmp(&in6->sin6_addr, &inpcb.inp_faddr6,
306: sizeof(struct in6_addr)) != 0 ||
307: in6->sin6_port != inpcb.inp_fport)
308: continue;
309: }
310: kget(kh, (u_long)inpcb.inp_ppcb, &tcpcb, sizeof(tcpcb));
311: if (tcpcb.t_state != TCPS_ESTABLISHED) {
312: if (vflag >= 2)
313: fprintf(stderr, "Not established\n");
314: continue;
315: }
316: if (vflag >= 2)
317: fprintf(stderr, "Found PCB at %p\n", prev);
318: return (u_long)prev;
319: }
320:
321: errx(1, "No matching PCB found");
322: }
323:
324: static void
325: kupdate_stats(kvm_t *kh, u_long tcbaddr,
326: struct inpcb *inpcb, struct tcpcb *tcpcb, struct socket *sockb)
327: {
328: kget(kh, tcbaddr, inpcb, sizeof(*inpcb));
329: kget(kh, (u_long)inpcb->inp_ppcb, tcpcb, sizeof(*tcpcb));
330: kget(kh, (u_long)inpcb->inp_socket, sockb, sizeof(*sockb));
331: }
332:
333: static void
334: check_kvar(const char *var)
335: {
336: size_t i;
337:
338: for (i = 0; allowed_kvars[i] != NULL; i++)
339: if (strcmp(allowed_kvars[i], var) == 0)
340: return;
341: errx(1, "Unrecognised kvar: %s", var);
342: }
343:
344: static void
345: list_kvars(void)
346: {
347: size_t i;
348:
349: fprintf(stderr, "Supported kernel variables:\n");
350: for (i = 0; allowed_kvars[i] != NULL; i++)
351: fprintf(stderr, "\t%s\n", allowed_kvars[i]);
352: }
353:
354: static char **
355: check_prepare_kvars(char *list)
356: {
357: char *item, **ret = NULL;
358: size_t n = 0;
359:
360: while ((item = strsep(&list, ", \t\n")) != NULL) {
361: check_kvar(item);
362: if ((ret = realloc(ret, sizeof(*ret) * (++n + 1))) == NULL)
363: errx(1, "realloc(kvars)");
364: if ((ret[n - 1] = strdup(item)) == NULL)
365: errx(1, "strdup");
366: ret[n] = NULL;
367: }
368: return ret;
369: }
370:
371: static void
1.11 claudio 372: stats_prepare(struct statctx *sc, int fd, kvm_t *kh, u_long ktcbtab)
1.1 djm 373: {
374: if (rflag <= 0)
375: return;
376: sc->kh = kh;
377: sc->kvars = kflag;
378: if (kflag)
1.11 claudio 379: sc->tcbaddr = kfind_tcb(kh, ktcbtab, fd);
380: if (gettimeofday(&sc->t_start, NULL) == -1)
381: err(1, "gettimeofday");
1.1 djm 382: sc->t_last = sc->t_start;
383: sc->bytes = 0;
384: }
385:
386: static void
387: stats_update(struct statctx *sc, ssize_t n)
388: {
389: sc->bytes += n;
1.11 claudio 390: mainstats.slice_bytes += n;
1.1 djm 391: }
392:
393: static void
1.11 claudio 394: stats_cleanslice(void)
1.1 djm 395: {
1.11 claudio 396: mainstats.slice_bytes = 0;
397: }
1.1 djm 398:
1.11 claudio 399: static void
400: stats_display(unsigned long long total_elapsed, long double mbps,
401: float bwperc, struct statctx *sc, struct inpcb *inpcb,
402: struct tcpcb *tcpcb, struct socket *sockb)
403: {
404: int j;
405:
406: printf("%12llu %14llu %12.3Lf %7.2f%% ", total_elapsed, sc->bytes,
407: mbps, bwperc);
408:
409: if (sc->kvars != NULL) {
410: kupdate_stats(sc->kh, sc->tcbaddr, inpcb, tcpcb,
411: sockb);
1.1 djm 412:
1.11 claudio 413: for (j = 0; sc->kvars[j] != NULL; j++) {
414: #define S(a) #a
415: #define P(b, v, f) \
416: if (strcmp(sc->kvars[j], S(b.v)) == 0) { \
417: printf("%s"f, j > 0 ? "," : "", b->v); \
418: continue; \
419: }
420: P(inpcb, inp_flags, "0x%08x")
421: P(sockb, so_rcv.sb_cc, "%lu")
422: P(sockb, so_rcv.sb_hiwat, "%lu")
423: P(sockb, so_snd.sb_cc, "%lu")
424: P(sockb, so_snd.sb_hiwat, "%lu")
425: P(tcpcb, snd_una, "%u")
426: P(tcpcb, snd_nxt, "%u")
427: P(tcpcb, snd_wl1, "%u")
428: P(tcpcb, snd_wl2, "%u")
429: P(tcpcb, snd_wnd, "%lu")
430: P(tcpcb, rcv_wnd, "%lu")
431: P(tcpcb, rcv_nxt, "%u")
432: P(tcpcb, rcv_adv, "%u")
433: P(tcpcb, snd_max, "%u")
434: P(tcpcb, snd_cwnd, "%lu")
435: P(tcpcb, snd_ssthresh, "%lu")
436: P(tcpcb, t_rcvtime, "%u")
437: P(tcpcb, t_rtttime, "%u")
438: P(tcpcb, t_rtseq, "%u")
439: P(tcpcb, t_srtt, "%hu")
440: P(tcpcb, t_rttvar, "%hu")
441: P(tcpcb, t_rttmin, "%hu")
442: P(tcpcb, max_sndwnd, "%lu")
443: P(tcpcb, snd_scale, "%u")
444: P(tcpcb, rcv_scale, "%u")
445: P(tcpcb, last_ack_sent, "%u")
446: #undef S
1.1 djm 447: #undef P
448: }
449: }
450: printf("\n");
451: }
452:
453: static void
1.11 claudio 454: mainstats_display(long double slice_mbps, long double avg_mbps)
1.1 djm 455: {
1.11 claudio 456: printf("Conn: %3d Mbps: %12.3Lf Peak Mbps: %12.3Lf Avg Mbps: %12.3Lf\n",
457: mainstats.nconns, slice_mbps, mainstats.peak_mbps, avg_mbps);
1.1 djm 458: }
459:
1.11 claudio 460: static void
461: process_slice(struct statctx *sc, size_t nsc)
1.1 djm 462: {
1.11 claudio 463: unsigned long long total_elapsed, since_last;
464: long double mbps, slice_mbps = 0;
465: float bwperc;
466: nfds_t i;
467: struct timeval t_cur, t_diff;
468: struct inpcb inpcb;
469: struct tcpcb tcpcb;
470: struct socket sockb;
471:
472: for (i = 0; i < nsc; i++, sc++) {
473: if (gettimeofday(&t_cur, NULL) == -1)
474: err(1, "gettimeofday");
475: if (sc->kvars != NULL) /* process kernel stats */
476: kupdate_stats(sc->kh, sc->tcbaddr, &inpcb, &tcpcb,
477: &sockb);
478: timersub(&t_cur, &sc->t_start, &t_diff);
479: total_elapsed = t_diff.tv_sec * 1000 + t_diff.tv_usec / 1000;
480: timersub(&t_cur, &sc->t_last, &t_diff);
481: since_last = t_diff.tv_sec * 1000 + t_diff.tv_usec / 1000;
482: bwperc = (sc->bytes * 100.0) / mainstats.slice_bytes;
483: mbps = (sc->bytes * 8) / (since_last * 1000.0);
484: slice_mbps += mbps;
485:
486: stats_display(total_elapsed, mbps, bwperc, sc,
487: &inpcb, &tcpcb, &sockb);
488:
489: sc->t_last = t_cur;
490: sc->bytes = 0;
1.1 djm 491:
1.11 claudio 492: }
1.1 djm 493:
1.11 claudio 494: /* process stats for this slice */
495: if (slice_mbps > mainstats.peak_mbps)
496: mainstats.peak_mbps = slice_mbps;
497: mainstats_display(slice_mbps, slice_mbps / mainstats.nconns);
498: }
1.1 djm 499:
1.11 claudio 500: static int
501: handle_connection(struct statctx *sc, int fd, char *buf, size_t buflen)
502: {
503: ssize_t n;
1.1 djm 504:
1.11 claudio 505: again:
506: n = read(fd, buf, buflen);
507: if (n == -1) {
508: if (errno == EINTR)
509: goto again;
510: else if (errno == EWOULDBLOCK)
511: return 0;
512: warn("fd %d read error", fd);
513:
514: return -1;
1.1 djm 515: }
1.11 claudio 516: else if (n == 0) {
517: if (vflag)
518: fprintf(stderr, "%8d closed by remote end\n", fd);
519: close(fd);
520: return -1;
521: }
522: if (vflag >= 3)
523: fprintf(stderr, "read: %zd bytes\n", n);
524:
525: stats_update(sc, n);
526: return 0;
1.1 djm 527: }
528:
1.11 claudio 529: static nfds_t
530: serverbind(struct pollfd *pfd, nfds_t max_nfds, struct addrinfo *aitop)
1.1 djm 531: {
532: char tmp[128];
1.11 claudio 533: int sock, on = 1;
1.1 djm 534: struct addrinfo *ai;
1.11 claudio 535: nfds_t lnfds;
1.1 djm 536:
1.11 claudio 537: lnfds = 0;
1.1 djm 538: for (ai = aitop; ai != NULL; ai = ai->ai_next) {
1.11 claudio 539: if (lnfds == max_nfds) {
540: fprintf(stderr,
541: "maximum number of listening fds reached\n");
542: break;
543: }
1.1 djm 544: saddr_ntop(ai->ai_addr, ai->ai_addrlen, tmp, sizeof(tmp));
545: if (vflag)
1.11 claudio 546: fprintf(stderr, "Try to listen on %s\n", tmp);
1.1 djm 547: if ((sock = socket(ai->ai_family, ai->ai_socktype,
548: ai->ai_protocol)) == -1) {
549: if (ai->ai_next == NULL)
550: err(1, "socket");
551: if (vflag)
552: warn("socket");
553: continue;
554: }
1.9 claudio 555: if (rdomain && ai->ai_family == AF_INET) {
556: if (setsockopt(sock, IPPROTO_IP, SO_RDOMAIN,
557: &rdomain, sizeof(rdomain)) == -1)
558: err(1, "setsockopt SO_RDOMAIN");
1.10 claudio 559: } else if (rdomain)
560: warnx("rdomain only supported on AF_INET");
1.1 djm 561: if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
562: &on, sizeof(on)) == -1)
563: warn("reuse port");
564: if (bind(sock, ai->ai_addr, ai->ai_addrlen) != 0) {
565: if (ai->ai_next == NULL)
566: err(1, "bind");
567: if (vflag)
568: warn("bind");
569: close(sock);
570: continue;
571: }
572: if (Sflag) {
573: if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF,
574: &Sflag, sizeof(Sflag)) == -1)
575: warn("set TCP receive buffer size");
576: }
577: if (listen(sock, 64) == -1) {
578: if (ai->ai_next == NULL)
579: err(1, "listen");
580: if (vflag)
581: warn("listen");
582: close(sock);
583: continue;
584: }
1.11 claudio 585: if (vflag >= 3)
586: fprintf(stderr, "listening on fd %d\n", sock);
587: lnfds++;
588: pfd[lnfds - 1].fd = sock;
589: pfd[lnfds - 1].events = POLLIN;
590:
1.1 djm 591: }
592: freeaddrinfo(aitop);
1.11 claudio 593: if (lnfds == 0)
1.1 djm 594: errx(1, "No working listen addresses found");
595:
1.11 claudio 596: return lnfds;
597: }
598:
599: static void
600: set_listening(struct pollfd *pfd, nfds_t lfds, int toggle) {
601: int i;
1.1 djm 602:
1.11 claudio 603: for (i = 0; i < (int)lfds; i++) {
604: if (toggle)
605: pfd[i].events = POLLIN;
606: else
607: pfd[i].events = 0;
608: }
609:
610: }
611: static void __dead
612: serverloop(kvm_t *kvmh, u_long ktcbtab, struct addrinfo *aitop)
613: {
614: socklen_t sslen;
615: struct pollfd *pfd;
616: char tmp[128], *buf;
617: struct statctx *psc;
618: struct sockaddr_storage ss;
619: nfds_t i, nfds, lfds;
620: size_t nalloc;
621: int r, sock, client_id;
622:
623: sslen = sizeof(ss);
624: nalloc = 128;
625: if ((pfd = calloc(sizeof(*pfd), nalloc)) == NULL)
626: err(1, "calloc");
627: if ((psc = calloc(sizeof(*psc), nalloc)) == NULL)
628: err(1, "calloc");
629: if ((buf = malloc(Bflag)) == NULL)
630: err(1, "malloc");
631: lfds = nfds = serverbind(pfd, nalloc - 1, aitop);
632: if (vflag >= 3)
633: fprintf(stderr, "listening on %d fds\n", lfds);
1.1 djm 634: if (setpgid(0, 0) == -1)
635: err(1, "setpgid");
1.11 claudio 636:
637: print_header();
638:
1.1 djm 639: client_id = 0;
1.11 claudio 640: while (!done) {
641: if (proc_slice) {
642: process_slice(psc + lfds, nfds - lfds);
643: stats_cleanslice();
644: proc_slice = 0;
645: }
646: if (vflag >= 3)
647: fprintf(stderr, "mainstats.nconns = %u\n",
648: mainstats.nconns);
1.1 djm 649: if ((r = poll(pfd, nfds, INFTIM)) == -1) {
650: if (errno == EINTR)
651: continue;
652: warn("poll");
653: break;
654: }
1.11 claudio 655:
1.1 djm 656: if (vflag >= 3)
657: fprintf(stderr, "poll: %d\n", r);
658: for (i = 0 ; r > 0 && i < nfds; i++) {
659: if ((pfd[i].revents & POLLIN) == 0)
660: continue;
1.11 claudio 661: if (pfd[i].fd == -1)
662: errx(1, "pfd insane");
663: r--;
1.1 djm 664: if (vflag >= 3)
1.11 claudio 665: fprintf(stderr, "fd %d active i = %d\n",
666: pfd[i].fd, i);
667: /* new connection */
668: if (i < lfds) {
669: if ((sock = accept(pfd[i].fd,
670: (struct sockaddr *)&ss,
671: &sslen)) == -1) {
672: if (errno == EINTR)
673: continue;
674: else if (errno == EMFILE ||
675: errno == ENFILE)
676: set_listening(pfd, lfds, 0);
677: warn("accept");
1.1 djm 678: continue;
1.11 claudio 679: }
680: if ((r = fcntl(sock, F_GETFL, 0)) == -1)
681: err(1, "fcntl(F_GETFL)");
682: r |= O_NONBLOCK;
683: if (fcntl(sock, F_SETFL, r) == -1)
684: err(1, "fcntl(F_SETFL, O_NONBLOCK)");
685: saddr_ntop((struct sockaddr *)&ss, sslen,
686: tmp, sizeof(tmp));
687: if (vflag)
688: fprintf(stderr,
689: "Accepted connection %d from "
690: "%s, fd = %d\n", client_id++, tmp,
691: sock);
692: /* alloc more space if we're full */
693: if (nfds == nalloc) {
694: nalloc *= 2;
695: if ((pfd = realloc(pfd,
696: sizeof(*pfd) * nalloc)) == NULL)
697: err(1, "realloc");
698: if ((psc = realloc(psc,
699: sizeof(*psc) * nalloc)) == NULL)
700: err(1, "realloc");
701: }
702: pfd[nfds].fd = sock;
703: pfd[nfds].events = POLLIN;
704: stats_prepare(&psc[nfds], sock, kvmh, ktcbtab);
705: nfds++;
706: if (!mainstats.nconns++)
707: set_timer(1);
708: continue;
1.1 djm 709: }
1.11 claudio 710: /* event in fd */
711: if (vflag >= 3)
712: fprintf(stderr,
713: "fd %d active", pfd[i].fd);
714: while (handle_connection(&psc[i], pfd[i].fd,
715: buf, Bflag) == -1) {
716: pfd[i] = pfd[nfds - 1];
717: pfd[nfds - 1].fd = -1;
718: psc[i] = psc[nfds - 1];
719: mainstats.nconns--;
720: nfds--;
721: /* stop display if no clients */
722: if (!mainstats.nconns) {
723: proc_slice = 1;
724: set_timer(0);
725: }
726: /* if we were full */
727: set_listening(pfd, lfds, 1);
728:
729: /* is there an event pending on the last fd? */
730: if (pfd[i].fd == -1 ||
731: (pfd[i].revents & POLLIN) == 0)
732: break;
1.1 djm 733: }
734: }
735: }
736: exit(1);
737: }
738:
1.14 claudio 739: void
740: clientconnect(struct addrinfo *aitop, struct pollfd *pfd, int nconn)
1.1 djm 741: {
1.14 claudio 742: char tmp[128];
1.13 claudio 743: struct addrinfo *ai;
1.14 claudio 744: int i, r, sock;
1.1 djm 745:
1.4 henning 746: for (i = 0; i < nconn; i++) {
747: for (sock = -1, ai = aitop; ai != NULL; ai = ai->ai_next) {
748: saddr_ntop(ai->ai_addr, ai->ai_addrlen, tmp,
749: sizeof(tmp));
1.14 claudio 750: if (vflag && i == 0)
1.4 henning 751: fprintf(stderr, "Trying %s\n", tmp);
752: if ((sock = socket(ai->ai_family, ai->ai_socktype,
753: ai->ai_protocol)) == -1) {
754: if (ai->ai_next == NULL)
755: err(1, "socket");
756: if (vflag)
757: warn("socket");
758: continue;
759: }
1.9 claudio 760: if (rdomain && ai->ai_family == AF_INET) {
761: if (setsockopt(sock, IPPROTO_IP, SO_RDOMAIN,
762: &rdomain, sizeof(rdomain)) == -1)
763: err(1, "setsockopt SO_RDOMAIN");
1.10 claudio 764: } else if (rdomain)
765: warnx("rdomain only supported on AF_INET");
1.4 henning 766: if (Sflag) {
767: if (setsockopt(sock, SOL_SOCKET, SO_SNDBUF,
768: &Sflag, sizeof(Sflag)) == -1)
769: warn("set TCP send buffer size");
770: }
771: if (connect(sock, ai->ai_addr, ai->ai_addrlen) != 0) {
772: if (ai->ai_next == NULL)
773: err(1, "connect");
774: if (vflag)
775: warn("connect");
776: close(sock);
777: sock = -1;
778: continue;
779: }
780: break;
1.1 djm 781: }
1.4 henning 782: if (sock == -1)
783: errx(1, "No host found");
784:
785: if ((r = fcntl(sock, F_GETFL, 0)) == -1)
786: err(1, "fcntl(F_GETFL)");
787: r |= O_NONBLOCK;
788: if (fcntl(sock, F_SETFL, r) == -1)
789: err(1, "fcntl(F_SETFL, O_NONBLOCK)");
790:
791: pfd[i].fd = sock;
792: pfd[i].events = POLLOUT;
1.14 claudio 793: }
794: freeaddrinfo(aitop);
795:
796: if (vflag && nconn > 1)
797: fprintf(stderr, "%u connections established\n", nconn);
798: }
799:
800: static void __dead
801: clientloop(kvm_t *kvmh, u_long ktcbtab, struct addrinfo *aitop, int nconn)
802: {
803: struct statctx *psc;
804: struct pollfd *pfd;
805: char *buf;
806: int i, sock = -1;
807: ssize_t n;
808:
809: if ((pfd = calloc(nconn, sizeof(*pfd))) == NULL)
810: err(1, "clientloop pfd calloc");
811: if ((psc = calloc(nconn, sizeof(*psc))) == NULL)
812: err(1, "clientloop psc calloc");
813:
814: clientconnect(aitop, pfd, nconn);
815:
816: for (i = 0; i < nconn; i++) {
1.11 claudio 817: stats_prepare(psc + i, sock, kvmh, ktcbtab);
818: mainstats.nconns++;
1.1 djm 819: }
820:
1.14 claudio 821: if ((buf = malloc(Bflag)) == NULL)
822: err(1, "malloc");
1.1 djm 823: arc4random_buf(buf, Bflag);
824:
1.11 claudio 825: print_header();
826: set_timer(1);
1.1 djm 827:
828: while (!done) {
1.11 claudio 829: if (proc_slice) {
1.14 claudio 830: process_slice(psc, nconn);
1.11 claudio 831: stats_cleanslice();
832: proc_slice = 0;
1.1 djm 833: }
1.4 henning 834: if (poll(pfd, nconn, INFTIM) == -1) {
1.1 djm 835: if (errno == EINTR)
836: continue;
837: err(1, "poll");
838: }
1.4 henning 839: for (i = 0; i < nconn; i++) {
1.7 henning 840: if (pfd[i].revents & POLLOUT) {
1.4 henning 841: if ((n = write(pfd[i].fd, buf, Bflag)) == -1) {
842: if (errno == EINTR || errno == EAGAIN)
843: continue;
844: err(1, "write");
845: }
1.7 henning 846: if (n == 0) {
847: warnx("Remote end closed connection");
848: done = -1;
849: break;
850: }
851: if (vflag >= 3)
852: fprintf(stderr, "write: %zd bytes\n",
853: n);
1.11 claudio 854: stats_update(psc + i, n);
1.4 henning 855: }
1.1 djm 856: }
857: }
1.11 claudio 858:
1.1 djm 859: if (done > 0)
860: warnx("Terminated by signal %d", done);
861:
862: free(buf);
863: close(sock);
864: exit(0);
865: }
866:
867: static void
868: drop_gid(void)
869: {
870: gid_t gid;
871:
872: gid = getgid();
873: if (setresgid(gid, gid, gid) == -1)
874: err(1, "setresgid");
875: }
876:
877: int
878: main(int argc, char **argv)
879: {
880: extern int optind;
881: extern char *optarg;
882:
883: char kerr[_POSIX2_LINE_MAX], *tmp;
1.11 claudio 884: struct addrinfo *aitop, hints;
1.1 djm 885: const char *errstr;
1.11 claudio 886: kvm_t *kvmh = NULL;
887: struct rlimit rl;
1.1 djm 888: int ch, herr;
1.12 deraadt 889: struct nlist nl[] = { { "_tcbtable" }, { "" } };
1.1 djm 890: const char *host = NULL, *port = DEFAULT_PORT;
1.4 henning 891: int nconn = 1;
1.1 djm 892:
1.11 claudio 893: Bflag = DEFAULT_BUF;
894: Sflag = sflag = vflag = rdomain = 0;
895: kflag = NULL;
896: rflag = DEFAULT_STATS_INTERVAL;
1.1 djm 897:
1.9 claudio 898: while ((ch = getopt(argc, argv, "B:hlk:n:p:r:sS:vV:")) != -1) {
1.1 djm 899: switch (ch) {
900: case 'l':
901: list_kvars();
902: exit(0);
903: case 'k':
904: if ((tmp = strdup(optarg)) == NULL)
905: errx(1, "strdup");
906: kflag = check_prepare_kvars(tmp);
907: free(tmp);
908: break;
909: case 'r':
910: rflag = strtonum(optarg, 0, 60 * 60 * 24 * 1000,
911: &errstr);
912: if (errstr != NULL)
913: errx(1, "statistics interval is %s: %s",
914: errstr, optarg);
915: break;
916: case 'p':
917: port = optarg;
918: break;
919: case 's':
920: sflag = 1;
921: break;
922: case 'S':
923: Sflag = strtonum(optarg, 0, 1024*1024*1024,
924: &errstr);
925: if (errstr != NULL)
926: errx(1, "receive space interval is %s: %s",
927: errstr, optarg);
928: break;
929: case 'B':
930: Bflag = strtonum(optarg, 0, 1024*1024*1024,
931: &errstr);
932: if (errstr != NULL)
933: errx(1, "read/write buffer size is %s: %s",
934: errstr, optarg);
935: break;
936: case 'v':
1.7 henning 937: vflag++;
1.9 claudio 938: break;
939: case 'V':
940: rdomain = (unsigned int)strtonum(optarg, 0,
941: RT_TABLEID_MAX, &errstr);
942: if (errstr)
943: errx(1, "rdomain value is %s: %s",
944: errstr, optarg);
1.1 djm 945: break;
1.4 henning 946: case 'n':
947: nconn = strtonum(optarg, 0, 65535, &errstr);
948: if (errstr != NULL)
949: errx(1, "number of connections is %s: %s",
950: errstr, optarg);
951: break;
1.1 djm 952: case 'h':
953: default:
954: usage();
955: }
956: }
957:
958: argv += optind;
959: argc -= optind;
960: if (argc != (sflag ? 0 : 1))
961: usage();
1.4 henning 962:
1.1 djm 963: if (!sflag)
964: host = argv[0];
965:
1.13 claudio 966: bzero(&hints, sizeof(hints));
967: hints.ai_socktype = SOCK_STREAM;
968: if (sflag)
1.4 henning 969: hints.ai_flags = AI_PASSIVE;
1.13 claudio 970: if ((herr = getaddrinfo(host, port, &hints, &aitop)) != 0) {
971: if (herr == EAI_SYSTEM)
972: err(1, "getaddrinfo");
973: else
974: errx(1, "getaddrinfo: %s", gai_strerror(herr));
1.1 djm 975: }
976:
977: if (kflag) {
978: if ((kvmh = kvm_openfiles(NULL, NULL, NULL,
979: O_RDONLY, kerr)) == NULL)
980: errx(1, "kvm_open: %s", kerr);
981: drop_gid();
982: if (kvm_nlist(kvmh, nl) < 0 || nl[0].n_type == 0)
983: errx(1, "kvm: no namelist");
984: } else
985: drop_gid();
986:
1.11 claudio 987: signal(SIGINT, exitsighand);
988: signal(SIGTERM, exitsighand);
989: signal(SIGHUP, exitsighand);
990: signal(SIGPIPE, SIG_IGN);
991: signal(SIGALRM, alarmhandler);
992:
993: if (getrlimit(RLIMIT_NOFILE, &rl) == -1)
994: err(1, "getrlimit");
995: if (rl.rlim_cur < MAX_FD)
996: rl.rlim_cur = MAX_FD;
997: if (setrlimit(RLIMIT_NOFILE, &rl))
998: err(1, "setrlimit");
999: if (getrlimit(RLIMIT_NOFILE, &rl) == -1)
1000: err(1, "getrlimit");
1001:
1.1 djm 1002: if (sflag)
1.11 claudio 1003: serverloop(kvmh, nl[0].n_value, aitop);
1.1 djm 1004: else
1.13 claudio 1005: clientloop(kvmh, nl[0].n_value, aitop, nconn);
1.1 djm 1006:
1007: return 0;
1008: }