2 * netsniff-ng - the packet sniffing beast
3 * By Daniel Borkmann <daniel@netsniff-ng.org>
4 * Copyright 2011 - 2013 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,
5 * Swiss federal institute of technology (ETH Zurich)
6 * Subject to the GPL, version 2.
8 * A high-performance network traffic generator that uses the zero-copy
9 * kernelspace TX_RING for network I/O. On comodity Gigabit hardware up
10 * to 1,488,095 pps 64 Byte pps have been achieved with 2 trafgen instances
11 * bound to different CPUs from the userspace and turned off pause frames,
12 * ask Ronald from NST (Network Security Toolkit) for more details. ;-)
13 * So, this line-rate result is the very same as pktgen from kernelspace!
15 * Who can now hold the fords when the King of the Nine Riders comes? And
16 * other armies will come. I am too late. All is lost. I tarried on the
17 * way. All is lost. Even if my errand is performed, no one will ever
18 * know. There will be no one I can tell. It will be in vain.
20 * -- The Lord of the Rings, Frodo thinking,
21 * Chapter 'The Stairs of Cirith Ungol'.
29 #include <sys/socket.h>
30 #include <sys/types.h>
31 #include <sys/fsuid.h>
36 #include <net/ethernet.h>
37 #include <netinet/in.h>
38 #include <netinet/ip.h>
39 #include <linux/icmp.h>
40 #include <arpa/inet.h>
57 #include "trafgen_conf.h"
63 bool rand
, rfraw
, jumbo_support
, verbose
, smoke_test
, enforce
;
64 unsigned long kpull
, num
, gap
, reserve_size
, cpus
;
65 uid_t uid
; gid_t gid
; char *device
, *device_trans
, *rhost
;
66 struct sockaddr_in dest
;
70 unsigned long tv_sec
, tv_usec
;
71 unsigned long long tx_packets
, tx_bytes
;
72 unsigned long long cf_packets
, cf_bytes
;
73 unsigned long long cd_packets
;
77 sig_atomic_t sigint
= 0;
79 struct packet
*packets
= NULL
;
82 struct packet_dyn
*packet_dyn
= NULL
;
85 static const char *short_options
= "d:c:n:t:vJhS:rk:i:o:VRsP:eE:pu:g:";
86 static const struct option long_options
[] = {
87 {"dev", required_argument
, NULL
, 'd'},
88 {"out", required_argument
, NULL
, 'o'},
89 {"in", required_argument
, NULL
, 'i'},
90 {"conf", required_argument
, NULL
, 'c'},
91 {"num", required_argument
, NULL
, 'n'},
92 {"gap", required_argument
, NULL
, 't'},
93 {"cpus", required_argument
, NULL
, 'P'},
94 {"ring-size", required_argument
, NULL
, 'S'},
95 {"kernel-pull", required_argument
, NULL
, 'k'},
96 {"smoke-test", required_argument
, NULL
, 's'},
97 {"seed", required_argument
, NULL
, 'E'},
98 {"user", required_argument
, NULL
, 'u'},
99 {"group", required_argument
, NULL
, 'g'},
100 {"jumbo-support", no_argument
, NULL
, 'J'},
101 {"cpp", no_argument
, NULL
, 'p'},
102 {"rfraw", no_argument
, NULL
, 'R'},
103 {"rand", no_argument
, NULL
, 'r'},
104 {"verbose", no_argument
, NULL
, 'V'},
105 {"version", no_argument
, NULL
, 'v'},
106 {"example", no_argument
, NULL
, 'e'},
107 {"help", no_argument
, NULL
, 'h'},
113 static struct itimerval itimer
;
115 static unsigned long interval
= TX_KERNEL_PULL_INT
;
117 static struct cpu_stats
*stats
;
121 #define CPU_STATS_STATE_CFG 1
122 #define CPU_STATS_STATE_CHK 2
123 #define CPU_STATS_STATE_RES 4
126 # define ICMP_FILTER 1
133 static void signal_handler(int number
)
144 static void timer_elapsed(int number
)
146 set_itimer_interval_value(&itimer
, 0, interval
);
147 pull_and_flush_tx_ring(sock
);
148 setitimer(ITIMER_REAL
, &itimer
, NULL
);
151 static void help(void)
153 printf("\ntrafgen %s, multithreaded zero-copy network packet generator\n", VERSION_STRING
);
154 puts("http://www.netsniff-ng.org\n\n"
155 "Usage: trafgen [options]\n"
157 " -i|-c|--in|--conf <cfg/-> Packet configuration file/stdin\n"
158 " -o|-d|--out|--dev <netdev> Networking device i.e., eth0\n"
159 " -p|--cpp Run packet config through C preprocessor\n"
160 " -J|--jumbo-support Support 64KB super jumbo frames (def: 2048B)\n"
161 " -R|--rfraw Inject raw 802.11 frames\n"
162 " -s|--smoke-test <ipv4> Probe if machine survived fuzz-tested packet\n"
163 " -n|--num <uint> Number of packets until exit (def: 0)\n"
164 " -r|--rand Randomize packet selection (def: round robin)\n"
165 " -P|--cpus <uint> Specify number of forks(<= CPUs) (def: #CPUs)\n"
166 " -t|--gap <uint> Interpacket gap in us (approx)\n"
167 " -S|--ring-size <size> Manually set mmap size (KiB/MiB/GiB)\n"
168 " -k|--kernel-pull <uint> Kernel batch interval in us (def: 10us)\n"
169 " -E|--seed <uint> Manually set srand(3) seed\n"
170 " -u|--user <userid> Drop privileges and change to userid\n"
171 " -g|--group <groupid> Drop privileges and change to groupid\n"
172 " -V|--verbose Be more verbose\n"
173 " -v|--version Show version\n"
174 " -e|--example Show built-in packet config example\n"
175 " -h|--help Guess what?!\n\n"
177 " See trafgen.txf for configuration file examples.\n"
178 " trafgen --dev eth0 --conf trafgen.cfg\n"
179 " trafgen -e | trafgen -i - -o eth0 --cpp -n 1\n"
180 " trafgen --dev eth0 --conf fuzzing.cfg --smoke-test 10.0.0.1\n"
181 " trafgen --dev wlan0 --rfraw --conf beacon-test.txf -V --cpus 2\n"
182 " trafgen --dev eth0 --conf frag_dos.cfg --rand --gap 1000\n"
183 " trafgen --dev eth0 --conf icmp.cfg --rand --num 1400000 -k1000\n"
184 " trafgen --dev eth0 --conf tcp_syn.cfg -u `id -u bob` -g `id -g bob`\n\n"
185 "Arbitrary packet config examples (e.g. trafgen -e > trafgen.cfg):\n"
186 " Run packet on all CPUs: { fill(0xff, 64) csum16(0, 64) }\n"
187 " Run packet only on CPU1: cpu(1): { rnd(64), 0b11001100, 0xaa }\n"
188 " Run packet only on CPU1-2: cpu(1:2): { drnd(64),'a',csum16(1, 8),'b',42 }\n\n"
190 " Smoke/fuzz test example: machine A, 10.0.0.2 (trafgen) is directly\n"
191 " connected to machine B (test kernel), 10.0.0.1. If ICMP reply fails\n"
192 " we assume the kernel crashed, thus we print the packet and quit.\n"
193 " In case you find a ping-of-death, please mention trafgen in your\n"
194 " commit message of the fix!\n\n"
195 " For introducing bit errors, delays with random variation and more,\n"
196 " make use of tc(8) with its different disciplines, i.e. netem.\n\n"
197 " For generating different package distributions, you can use scripting\n"
198 " to generate a trafgen config file with packet ratios as:\n\n"
199 " IMIX 64:7, 570:4, 1518:1\n"
200 " Tolly 64:55, 78:5, 576:17, 1518:23\n"
201 " Cisco 64:7, 594:4, 1518:1\n"
202 " RPR Trimodal 64:60, 512:20, 1518:20\n"
203 " RPR Quadrimodal 64:50, 512:15, 1518:15, 9218:20\n\n"
204 "Please report bugs to <bugs@netsniff-ng.org>\n"
205 "Copyright (C) 2011-2013 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n"
206 "Swiss federal institute of technology (ETH Zurich)\n"
207 "License: GNU GPL version 2.0\n"
208 "This is free software: you are free to change and redistribute it.\n"
209 "There is NO WARRANTY, to the extent permitted by law.\n");
213 static void example(void)
216 "/* Note: dynamic elements make trafgen slower! */\n\n"
217 "#include <stddef.h>\n"
218 "#define SYN (1 << 1)\n"
219 "#define ECN (1 << 6)\n\n"
221 " /* MAC Destination */\n"
222 " fill(0xff, ETH_ALEN),\n"
223 " /* MAC Source */\n"
224 " 0x00, 0x02, 0xb3, drnd(3),\n"
225 " /* IPv4 Protocol */\n"
227 " /* IPv4 Version, IHL, TOS */\n"
229 " /* IPv4 Total Len */\n"
231 " /* IPv4 Ident */\n"
233 " /* IPv4 Flags, Frag Off */\n"
239 " /* IPv4 Checksum (IP header from, to) */\n"
245 " /* TCP Source Port */\n"
247 " /* TCP Dest Port */\n"
249 " /* TCP Sequence Number */\n"
251 " /* TCP Ackn. Number */\n"
253 " /* TCP Header length + TCP SYN/ECN Flag */\n"
254 " c16((0x8 << 12) | SYN | ECN)\n"
255 " /* Window Size */\n"
257 " /* TCP Checksum (offset IP, offset TCP) */\n"
258 " csumtcp(14, 34),\n"
259 " /* TCP Options */\n"
260 " 0x00, 0x00, 0x01, 0x01, 0x08, 0x0a, 0x06,\n"
261 " 0x91, 0x68, 0x7d, 0x06, 0x91, 0x68, 0x6f,\n"
269 static void version(void)
271 printf("\ntrafgen %s, multithreaded zero-copy network packet generator\n", VERSION_STRING
);
272 puts("http://www.netsniff-ng.org\n\n"
273 "Please report bugs to <bugs@netsniff-ng.org>\n"
274 "Copyright (C) 2011-2013 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n"
275 "Swiss federal institute of technology (ETH Zurich)\n"
276 "License: GNU GPL version 2.0\n"
277 "This is free software: you are free to change and redistribute it.\n"
278 "There is NO WARRANTY, to the extent permitted by law.\n");
282 static void apply_counter(int counter_id
)
284 int j
, i
= counter_id
;
285 size_t counter_max
= packet_dyn
[i
].clen
;
287 for (j
= 0; j
< counter_max
; ++j
) {
289 struct counter
*counter
= &packet_dyn
[i
].cnt
[j
];
291 val
= counter
->val
- counter
->min
;
293 switch (counter
->type
) {
295 val
= (val
+ counter
->inc
) % (counter
->max
- counter
->min
+ 1);
298 val
= (val
- counter
->inc
) % (counter
->min
- counter
->max
+ 1);
304 counter
->val
= val
+ counter
->min
;
305 packets
[i
].payload
[counter
->off
] = val
;
309 static void apply_randomizer(int rand_id
)
312 size_t rand_max
= packet_dyn
[i
].rlen
;
314 for (j
= 0; j
< rand_max
; ++j
) {
315 uint8_t val
= (uint8_t) rand();
316 struct randomizer
*randomizer
= &packet_dyn
[i
].rnd
[j
];
318 packets
[i
].payload
[randomizer
->off
] = val
;
322 /* Taken and modified from tcpdump, Copyright belongs to them! */
329 #define ADDCARRY(x) \
330 do { if ((x) > 65535) \
337 sum = l_util.s[0] + l_util.s[1]; \
341 static u16
__in_cksum(const struct cksum_vec
*vec
, int veclen
)
343 register const u16
*w
;
344 register int sum
= 0, mlen
= 0;
345 int byte_swapped
= 0;
355 for (; veclen
!= 0; vec
++, veclen
--) {
359 w
= (const u16
*) (void *) vec
->ptr
;
362 s_util
.c
[1] = *(const u8
*) w
;
364 w
= (const u16
*) (void *) ((const u8
*) w
+ 1);
369 if ((1 & (unsigned long) w
) && (mlen
> 0)) {
372 s_util
.c
[0] = *(const u8
*) w
;
373 w
= (const u16
*) (void *) ((const u8
*) w
+ 1);
378 while ((mlen
-= 32) >= 0) {
379 sum
+= w
[0]; sum
+= w
[1]; sum
+= w
[2]; sum
+= w
[3];
380 sum
+= w
[4]; sum
+= w
[5]; sum
+= w
[6]; sum
+= w
[7];
381 sum
+= w
[8]; sum
+= w
[9]; sum
+= w
[10]; sum
+= w
[11];
382 sum
+= w
[12]; sum
+= w
[13]; sum
+= w
[14]; sum
+= w
[15];
388 while ((mlen
-= 8) >= 0) {
389 sum
+= w
[0]; sum
+= w
[1]; sum
+= w
[2]; sum
+= w
[3];
395 if (mlen
== 0 && byte_swapped
== 0)
400 while ((mlen
-= 2) >= 0) {
410 s_util
.c
[1] = *(const u8
*) w
;
415 } else if (mlen
== -1)
416 s_util
.c
[0] = *(const u8
*) w
;
426 return (~sum
& 0xffff);
429 static u16
p4_csum(const struct ip
*ip
, const u8
*data
, u16 len
,
432 struct cksum_vec vec
[2];
441 memset(&ph
, 0, sizeof(ph
));
444 ph
.proto
= next_proto
;
445 ph
.src
= ip
->ip_src
.s_addr
;
446 ph
.dst
= ip
->ip_dst
.s_addr
;
448 vec
[0].ptr
= (const u8
*) (void *) &ph
;
449 vec
[0].len
= sizeof(ph
);
454 return __in_cksum(vec
, 2);
457 static void apply_csum16(int csum_id
)
460 size_t csum_max
= packet_dyn
[i
].slen
;
462 for (j
= 0; j
< csum_max
; ++j
) {
464 struct csum16
*csum
= &packet_dyn
[i
].csum
[j
];
466 fmemset(&packets
[i
].payload
[csum
->off
], 0, sizeof(sum
));
468 switch (csum
->which
) {
470 if (csum
->to
>= packets
[i
].len
)
471 csum
->to
= packets
[i
].len
- 1;
472 sum
= calc_csum(packets
[i
].payload
+ csum
->from
,
473 csum
->to
- csum
->from
+ 1, 0);
476 sum
= p4_csum((void *) packets
[i
].payload
+ csum
->from
,
477 packets
[i
].payload
+ csum
->to
,
478 (packets
[i
].len
- csum
->to
),
482 sum
= p4_csum((void *) packets
[i
].payload
+ csum
->from
,
483 packets
[i
].payload
+ csum
->to
,
484 (packets
[i
].len
- csum
->to
),
489 fmemcpy(&packets
[i
].payload
[csum
->off
], &sum
, sizeof(sum
));
493 static struct cpu_stats
*setup_shared_var(unsigned long cpus
)
496 char zbuff
[cpus
* sizeof(struct cpu_stats
)], file
[256];
497 struct cpu_stats
*buff
;
499 fmemset(zbuff
, 0, sizeof(zbuff
));
500 slprintf(file
, sizeof(file
), ".tmp_mmap.%u", (unsigned int) rand());
502 fd
= creat(file
, S_IRUSR
| S_IWUSR
);
506 fd
= open_or_die_m(file
, O_RDWR
| O_CREAT
| O_TRUNC
,
508 write_or_die(fd
, zbuff
, sizeof(zbuff
));
510 buff
= (void *) mmap(0, sizeof(zbuff
), PROT_READ
| PROT_WRITE
,
512 if (buff
== (void *) -1)
513 panic("Cannot setup shared variable!\n");
518 memset(buff
, 0, sizeof(zbuff
));
523 static void destroy_shared_var(void *buff
, unsigned long cpus
)
525 munmap(buff
, cpus
* sizeof(struct cpu_stats
));
528 static void dump_trafgen_snippet(uint8_t *payload
, size_t len
)
533 for (i
= 0; i
< len
; ++i
) {
536 printf("0x%02x, ", payload
[i
]);
542 static inline unsigned short csum(unsigned short *buf
, int nwords
)
546 for (sum
= 0; nwords
> 0; nwords
--)
548 sum
= (sum
>> 16) + (sum
& 0xffff);
554 static int xmit_smoke_setup(struct ctx
*ctx
)
556 int icmp_sock
, ret
, ttl
= 64;
557 struct icmp_filter filter
;
559 icmp_sock
= socket(AF_INET
, SOCK_RAW
, IPPROTO_ICMP
);
561 panic("Cannot get a ICMP socket: %s!\n", strerror(errno
));
563 filter
.data
= ~(1 << ICMP_ECHOREPLY
);
565 ret
= setsockopt(icmp_sock
, SOL_RAW
, ICMP_FILTER
, &filter
, sizeof(filter
));
567 panic("Cannot install filter!\n");
569 ret
= setsockopt(icmp_sock
, SOL_IP
, IP_TTL
, &ttl
, sizeof(ttl
));
571 panic("Cannot set TTL!\n");
573 memset(&ctx
->dest
, 0, sizeof(ctx
->dest
));
574 ctx
->dest
.sin_family
= AF_INET
;
575 ctx
->dest
.sin_port
= 0;
577 ret
= inet_aton(ctx
->rhost
, &ctx
->dest
.sin_addr
);
579 panic("Cannot resolv address!\n");
584 static int xmit_smoke_probe(int icmp_sock
, struct ctx
*ctx
)
586 int ret
, i
, probes
= 5;
587 short ident
, cnt
= 1;
588 uint8_t outpack
[512], *data
;
589 struct icmphdr
*icmp
;
591 size_t len
= sizeof(*icmp
) + 56;
592 struct sockaddr_in from
;
594 struct pollfd fds
= {
599 while (probes
-- > 0) {
600 ident
= htons((short) rand());
602 memset(outpack
, 0, sizeof(outpack
));
603 icmp
= (void *) outpack
;
604 icmp
->type
= ICMP_ECHO
;
607 icmp
->un
.echo
.id
= ident
;
608 icmp
->un
.echo
.sequence
= htons(cnt
++);
610 data
= ((uint8_t *) outpack
+ sizeof(*icmp
));
611 for (i
= 0; i
< 56; ++i
)
612 data
[i
] = (uint8_t) rand();
614 icmp
->checksum
= csum((unsigned short *) outpack
,
615 len
/ sizeof(unsigned short));
617 ret
= sendto(icmp_sock
, outpack
, len
, MSG_DONTWAIT
,
618 (struct sockaddr
*) &ctx
->dest
, sizeof(ctx
->dest
));
619 if (unlikely(ret
!= len
))
620 panic("Cannot send out probe: %s!\n", strerror(errno
));
622 ret
= poll(&fds
, 1, 500);
624 panic("Poll failed!\n");
626 if (fds
.revents
& POLLIN
) {
627 ret
= recvfrom(icmp_sock
, outpack
, sizeof(outpack
), 0,
628 (struct sockaddr
*) &from
, &from_len
);
629 if (unlikely(ret
<= 0))
630 panic("Probe receive failed!\n");
631 if (unlikely(from_len
!= sizeof(ctx
->dest
)))
633 if (unlikely(memcmp(&from
, &ctx
->dest
, sizeof(ctx
->dest
))))
635 if (unlikely(ret
< sizeof(*ip
) + sizeof(*icmp
)))
637 ip
= (void *) outpack
;
638 if (unlikely(ip
->ihl
* 4 + sizeof(*icmp
) > ret
))
640 icmp
= (void *) outpack
+ ip
->ihl
* 4;
641 if (unlikely(icmp
->un
.echo
.id
!= ident
))
651 static void xmit_slowpath_or_die(struct ctx
*ctx
, int cpu
)
653 int ret
, icmp_sock
= -1;
654 unsigned long num
= 1, i
= 0;
655 struct timeval start
, end
, diff
;
656 unsigned long long tx_bytes
= 0, tx_packets
= 0;
657 struct packet_dyn
*pktd
;
658 struct sockaddr_ll saddr
= {
659 .sll_family
= PF_PACKET
,
660 .sll_halen
= ETH_ALEN
,
661 .sll_ifindex
= device_ifindex(ctx
->device
),
668 icmp_sock
= xmit_smoke_setup(ctx
);
670 drop_privileges(ctx
->enforce
, ctx
->uid
, ctx
->gid
);
672 bug_on(gettimeofday(&start
, NULL
));
674 while (likely(sigint
== 0) && likely(num
> 0)) {
675 pktd
= &packet_dyn
[i
];
676 if (pktd
->clen
+ pktd
->rlen
+ pktd
->slen
) {
682 ret
= sendto(sock
, packets
[i
].payload
, packets
[i
].len
, 0,
683 (struct sockaddr
*) &saddr
, sizeof(saddr
));
684 if (unlikely(ret
< 0)) {
685 if (errno
== ENOBUFS
) {
690 panic("Sendto error: %s!\n", strerror(errno
));
693 tx_bytes
+= packets
[i
].len
;
696 if (ctx
->smoke_test
) {
697 ret
= xmit_smoke_probe(icmp_sock
, ctx
);
698 if (unlikely(ret
< 0)) {
699 printf("%sSmoke test alert:%s\n", colorize_start(bold
), colorize_end());
700 printf(" Remote host seems to be unresponsive to ICMP pings!\n");
701 printf(" Last instance was packet%lu, seed:%u, trafgen snippet:\n\n",
704 dump_trafgen_snippet(packets
[i
].payload
, packets
[i
].len
);
723 bug_on(gettimeofday(&end
, NULL
));
724 diff
= tv_subtract(end
, start
);
729 stats
[cpu
].tx_packets
= tx_packets
;
730 stats
[cpu
].tx_bytes
= tx_bytes
;
731 stats
[cpu
].tv_sec
= diff
.tv_sec
;
732 stats
[cpu
].tv_usec
= diff
.tv_usec
;
734 stats
[cpu
].state
|= CPU_STATS_STATE_RES
;
737 static void xmit_fastpath_or_die(struct ctx
*ctx
, int cpu
)
739 int ifindex
= device_ifindex(ctx
->device
);
742 unsigned long num
= 1, i
= 0, size
;
744 struct frame_map
*hdr
;
745 struct timeval start
, end
, diff
;
746 struct packet_dyn
*pktd
;
747 unsigned long long tx_bytes
= 0, tx_packets
= 0;
749 fmemset(&tx_ring
, 0, sizeof(tx_ring
));
751 size
= ring_size(ctx
->device
, ctx
->reserve_size
);
753 set_sock_prio(sock
, 512);
754 set_packet_loss_discard(sock
);
756 setup_tx_ring_layout(sock
, &tx_ring
, size
, ctx
->jumbo_support
);
757 create_tx_ring(sock
, &tx_ring
, ctx
->verbose
);
758 mmap_tx_ring(sock
, &tx_ring
);
759 alloc_tx_ring_frames(&tx_ring
);
760 bind_tx_ring(sock
, &tx_ring
, ifindex
);
762 drop_privileges(ctx
->enforce
, ctx
->uid
, ctx
->gid
);
765 interval
= ctx
->kpull
;
769 set_itimer_interval_value(&itimer
, 0, interval
);
770 setitimer(ITIMER_REAL
, &itimer
, NULL
);
772 bug_on(gettimeofday(&start
, NULL
));
774 while (likely(sigint
== 0) && likely(num
> 0)) {
775 while (user_may_pull_from_tx(tx_ring
.frames
[it
].iov_base
) && likely(num
> 0)) {
776 hdr
= tx_ring
.frames
[it
].iov_base
;
778 /* Kernel assumes: data = ph.raw + po->tp_hdrlen -
779 * sizeof(struct sockaddr_ll); */
780 out
= ((uint8_t *) hdr
) + TPACKET2_HDRLEN
- sizeof(struct sockaddr_ll
);
782 hdr
->tp_h
.tp_snaplen
= packets
[i
].len
;
783 hdr
->tp_h
.tp_len
= packets
[i
].len
;
785 pktd
= &packet_dyn
[i
];
786 if (pktd
->clen
+ pktd
->rlen
+ pktd
->slen
) {
792 fmemcpy(out
, packets
[i
].payload
, packets
[i
].len
);
794 tx_bytes
+= packets
[i
].len
;
804 kernel_may_pull_from_tx(&hdr
->tp_h
);
807 if (it
>= tx_ring
.layout
.tp_frame_nr
)
813 if (unlikely(sigint
== 1))
818 bug_on(gettimeofday(&end
, NULL
));
819 diff
= tv_subtract(end
, start
);
821 destroy_tx_ring(sock
, &tx_ring
);
823 stats
[cpu
].tx_packets
= tx_packets
;
824 stats
[cpu
].tx_bytes
= tx_bytes
;
825 stats
[cpu
].tv_sec
= diff
.tv_sec
;
826 stats
[cpu
].tv_usec
= diff
.tv_usec
;
828 stats
[cpu
].state
|= CPU_STATS_STATE_RES
;
831 static inline void __set_state(int cpu
, sig_atomic_t s
)
833 stats
[cpu
].state
= s
;
836 static inline sig_atomic_t __get_state(int cpu
)
838 return stats
[cpu
].state
;
841 static unsigned long __wait_and_sum_others(struct ctx
*ctx
, int cpu
)
846 for (i
= 0, total
= plen
; i
< ctx
->cpus
; i
++) {
850 while ((__get_state(i
) & CPU_STATS_STATE_CFG
) == 0 &&
854 total
+= stats
[i
].cf_packets
;
860 static void __correct_global_delta(struct ctx
*ctx
, int cpu
, unsigned long orig
)
864 long long delta_correction
= 0;
866 for (i
= 0, total
= ctx
->num
; i
< ctx
->cpus
; i
++) {
870 while ((__get_state(i
) & CPU_STATS_STATE_CHK
) == 0 &&
874 total
+= stats
[i
].cd_packets
;
878 delta_correction
= -1 * ((long long) total
- orig
);
880 delta_correction
= +1 * ((long long) orig
- total
);
882 for (cpu_sel
= -1, i
= 0; i
< ctx
->cpus
; i
++) {
883 if (stats
[i
].cd_packets
> 0) {
884 if ((long long) stats
[i
].cd_packets
+
885 delta_correction
> 0) {
893 ctx
->num
+= delta_correction
;
896 static void __set_state_cf(int cpu
, unsigned long p
, unsigned long b
,
899 stats
[cpu
].cf_packets
= p
;
900 stats
[cpu
].cf_bytes
= b
;
901 stats
[cpu
].state
= s
;
904 static void __set_state_cd(int cpu
, unsigned long p
, sig_atomic_t s
)
906 stats
[cpu
].cd_packets
= p
;
907 stats
[cpu
].state
= s
;
910 static int xmit_packet_precheck(struct ctx
*ctx
, int cpu
)
913 unsigned long plen_total
, orig
= ctx
->num
;
914 size_t mtu
, total_len
= 0;
916 bug_on(plen
!= dlen
);
918 for (i
= 0; i
< plen
; ++i
)
919 total_len
+= packets
[i
].len
;
921 __set_state_cf(cpu
, plen
, total_len
, CPU_STATS_STATE_CFG
);
922 plen_total
= __wait_and_sum_others(ctx
, cpu
);
925 ctx
->num
= (unsigned long) nearbyint((1.0 * plen
/ plen_total
) * orig
);
927 __set_state_cd(cpu
, ctx
->num
, CPU_STATS_STATE_CHK
|
928 CPU_STATS_STATE_CFG
);
929 __correct_global_delta(ctx
, cpu
, orig
);
933 __set_state(cpu
, CPU_STATS_STATE_RES
);
937 for (mtu
= device_mtu(ctx
->device
), i
= 0; i
< plen
; ++i
) {
938 if (packets
[i
].len
> mtu
+ 14)
939 panic("Device MTU < than packet%d's size!\n", i
);
940 if (packets
[i
].len
<= 14)
941 panic("Packet%d's size too short!\n", i
);
947 static void main_loop(struct ctx
*ctx
, char *confname
, bool slow
,
948 int cpu
, bool invoke_cpp
)
950 compile_packets(confname
, ctx
->verbose
, cpu
, invoke_cpp
);
951 if (xmit_packet_precheck(ctx
, cpu
) < 0)
956 size_t total_len
= 0, total_pkts
= 0;
958 for (i
= 0; i
< ctx
->cpus
; ++i
) {
959 total_len
+= stats
[i
].cf_bytes
;
960 total_pkts
+= stats
[i
].cf_packets
;
963 printf("%6zu packets to schedule\n", total_pkts
);
964 printf("%6zu bytes in total\n", total_len
);
965 printf("Running! Hang up with ^C!\n\n");
972 xmit_slowpath_or_die(ctx
, cpu
);
974 xmit_fastpath_or_die(ctx
, cpu
);
981 static unsigned int generate_srand_seed(void)
986 fd
= open("/dev/urandom", O_RDONLY
);
990 read_or_die(fd
, &seed
, sizeof(seed
));
996 int main(int argc
, char **argv
)
998 bool slow
= false, invoke_cpp
= false, reseed
= true;
999 int c
, opt_index
, i
, j
, vals
[4] = {0}, irq
;
1000 char *confname
= NULL
, *ptr
;
1001 unsigned long cpus_tmp
;
1002 unsigned long long tx_packets
, tx_bytes
;
1005 fmemset(&ctx
, 0, sizeof(ctx
));
1006 ctx
.cpus
= get_number_cpus_online();
1010 while ((c
= getopt_long(argc
, argv
, short_options
, long_options
,
1011 &opt_index
)) != EOF
) {
1029 cpus_tmp
= strtoul(optarg
, NULL
, 0);
1030 if (cpus_tmp
> 0 && cpus_tmp
< ctx
.cpus
)
1031 ctx
.cpus
= cpus_tmp
;
1035 ctx
.device
= xstrndup(optarg
, IFNAMSIZ
);
1043 ctx
.smoke_test
= true;
1044 ctx
.rhost
= xstrdup(optarg
);
1050 ctx
.jumbo_support
= true;
1054 confname
= xstrdup(optarg
);
1055 if (!strncmp("-", confname
, strlen("-")))
1059 ctx
.uid
= strtoul(optarg
, NULL
, 0);
1063 ctx
.gid
= strtoul(optarg
, NULL
, 0);
1067 ctx
.kpull
= strtoul(optarg
, NULL
, 0);
1070 seed
= strtoul(optarg
, NULL
, 0);
1074 ctx
.num
= strtoul(optarg
, NULL
, 0);
1078 ctx
.gap
= strtoul(optarg
, NULL
, 0);
1080 /* Fall back to single core to not
1081 * mess up correct timing. We are slow
1088 ctx
.reserve_size
= 0;
1090 for (j
= i
= strlen(optarg
); i
> 0; --i
) {
1091 if (!isdigit(optarg
[j
- i
]))
1096 if (!strncmp(ptr
, "KiB", strlen("KiB")))
1097 ctx
.reserve_size
= 1 << 10;
1098 else if (!strncmp(ptr
, "MiB", strlen("MiB")))
1099 ctx
.reserve_size
= 1 << 20;
1100 else if (!strncmp(ptr
, "GiB", strlen("GiB")))
1101 ctx
.reserve_size
= 1 << 30;
1103 panic("Syntax error in ring size param!\n");
1106 ctx
.reserve_size
*= strtol(optarg
, NULL
, 0);
1123 panic("Option -%c requires an argument!\n",
1126 if (isprint(optopt
))
1127 printf("Unknown option character `0x%X\'!\n", optopt
);
1137 if (ctx
.device
== NULL
)
1138 panic("No networking device given!\n");
1139 if (confname
== NULL
)
1140 panic("No configuration file given!\n");
1141 if (device_mtu(ctx
.device
) == 0)
1142 panic("This is no networking device!\n");
1143 if (!ctx
.rfraw
&& device_up_and_running(ctx
.device
) == 0)
1144 panic("Networking device not running!\n");
1146 register_signal(SIGINT
, signal_handler
);
1147 register_signal(SIGHUP
, signal_handler
);
1148 register_signal_f(SIGALRM
, timer_elapsed
, SA_SIGINFO
);
1150 set_system_socket_memory(vals
, array_size(vals
));
1154 ctx
.device_trans
= xstrdup(ctx
.device
);
1157 enter_rfmon_mac80211(ctx
.device_trans
, &ctx
.device
);
1161 irq
= device_irq_number(ctx
.device
);
1162 device_set_irq_affinity_list(irq
, 0, ctx
.cpus
- 1);
1164 if (ctx
.num
> 0 && ctx
.num
<= ctx
.cpus
)
1167 stats
= setup_shared_var(ctx
.cpus
);
1169 for (i
= 0; i
< ctx
.cpus
; i
++) {
1175 seed
= generate_srand_seed();
1179 main_loop(&ctx
, confname
, slow
, i
, invoke_cpp
);
1183 panic("Cannot fork processes!\n");
1187 for (i
= 0; i
< ctx
.cpus
; i
++) {
1191 if (WEXITSTATUS(status
) == EXIT_FAILURE
)
1196 leave_rfmon_mac80211(ctx
.device_trans
, ctx
.device
);
1198 reset_system_socket_memory(vals
, array_size(vals
));
1200 for (i
= 0, tx_packets
= tx_bytes
= 0; i
< ctx
.cpus
; i
++) {
1201 while ((__get_state(i
) & CPU_STATS_STATE_RES
) == 0)
1204 tx_packets
+= stats
[i
].tx_packets
;
1205 tx_bytes
+= stats
[i
].tx_bytes
;
1210 printf("\r%12llu packets outgoing\n", tx_packets
);
1211 printf("\r%12llu bytes outgoing\n", tx_bytes
);
1212 for (i
= 0; i
< ctx
.cpus
; i
++) {
1213 printf("\r%12lu sec, %lu usec on CPU%d (%llu packets)\n",
1214 stats
[i
].tv_sec
, stats
[i
].tv_usec
, i
,
1215 stats
[i
].tx_packets
);
1220 destroy_shared_var(stats
, ctx
.cpus
);
1223 free(ctx
.device_trans
);