2 * $Id: pktgen.c,v 1.8 2002/07/15 19:30:17 robert Exp $
3 * pktgen.c: Packet Generator for performance evaluation.
5 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
6 * Uppsala University, Sweden
8 * A tool for loading the network with preconfigurated packets.
9 * The tool is implemented as a linux module. Parameters are output
10 * device, IPG (interpacket gap), number of packets, and whether
11 * to use multiple SKBs or just the same one.
12 * pktgen uses the installed interface's output routine.
14 * Additional hacking by:
16 * Jens.Laas@data.slu.se
17 * Improved by ANK. 010120.
18 * Improved by ANK even more. 010212.
19 * MAC address typo fixed. 010417 --ro
20 * Integrated. 020301 --DaveM
21 * Added multiskb option 020301 --DaveM
22 * Scaling of results. 020417--sigurdur@linpro.no
23 * Significant re-work of the module:
24 * * Updated to support generation over multiple interfaces at once
25 * by creating 32 /proc/net/pg* files. Each file can be manipulated
27 * * Converted many counters to __u64 to allow longer runs.
28 * * Allow configuration of ranges, like min/max IP address, MACs,
29 * and UDP-ports, for both source and destination, and can
30 * set to use a random distribution or sequentially walk the range.
31 * * Can now change some values after starting.
32 * * Place 12-byte packet in UDP payload with magic number,
33 * sequence number, and timestamp. Will write receiver next.
34 * * The new changes seem to have a performance impact of around 1%,
35 * as far as I can tell.
36 * --Ben Greear <greearb@candelatech.com>
37 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
39 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
40 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
41 * as a "fastpath" with a configurable number of clones after alloc's.
43 * clone_skb=0 means all packets are allocated this also means ranges time
44 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
47 * Also moved to /proc/net/pktgen/
50 * Fix refcount off by one if first packet fails, potential null deref,
53 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
55 * New xmit() return, do_div and misc clean up by Stephen Hemminger
56 * <shemminger@osdl.org> 040923
58 * See Documentation/networking/pktgen.txt for how to use this.
61 #include <linux/module.h>
62 #include <linux/moduleparam.h>
63 #include <linux/kernel.h>
64 #include <linux/sched.h>
65 #include <linux/types.h>
66 #include <linux/string.h>
67 #include <linux/ptrace.h>
68 #include <linux/errno.h>
69 #include <linux/ioport.h>
70 #include <linux/slab.h>
71 #include <linux/interrupt.h>
72 #include <linux/pci.h>
73 #include <linux/delay.h>
74 #include <linux/init.h>
75 #include <linux/inet.h>
76 #include <linux/rcupdate.h>
77 #include <asm/byteorder.h>
78 #include <asm/bitops.h>
81 #include <asm/uaccess.h>
85 #include <linux/udp.h>
86 #include <linux/skbuff.h>
87 #include <linux/netdevice.h>
88 #include <linux/inetdevice.h>
89 #include <linux/rtnetlink.h>
90 #include <linux/proc_fs.h>
91 #include <linux/if_arp.h>
92 #include <net/checksum.h>
93 #include <asm/timex.h>
95 #define cycles() ((u32)get_cycles())
98 #define VERSION "pktgen version 1.32"
99 static char version[] __initdata =
100 "pktgen.c: v1.4: Packet Generator for packet performance testing.\n";
102 /* Used to help with determining the pkts on receive */
104 #define PKTGEN_MAGIC 0xbe9be955
107 /* Keep information per interface */
111 /* If min != max, then we will either do a linear iteration, or
112 * we will do a random selection from within the range.
116 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
117 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
118 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
119 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
120 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
121 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
122 #define F_SET_SRCMAC (1<<6) /* Specify-Src-Mac
123 (default is to use Interface's MAC Addr) */
124 #define F_SET_SRCIP (1<<7) /* Specify-Src-IP
125 (default is to use Interface's IP Addr) */
128 int pkt_size; /* = ETH_ZLEN; */
130 __u32 ipg; /* Default Interpacket gap in nsec */
131 __u64 count; /* Default No packets to send */
132 __u64 sofar; /* How many pkts we've sent so far */
133 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
134 struct timeval started_at;
135 struct timeval stopped_at;
139 int clone_skb; /* Use multiple SKBs during packet gen. If this number
140 * is greater than 1, then that many coppies of the same
141 * packet will be sent before a new packet is allocated.
142 * For instance, if you want to send 1024 identical packets
143 * before creating a new packet, set clone_skb to 1024.
146 int do_run_run; /* if this changes to false, the test will stop */
154 /* If we're doing ranges, random or incremental, then this
155 * defines the min/max for those ranges.
157 __u32 saddr_min; /* inclusive, source IP address */
158 __u32 saddr_max; /* exclusive, source IP address */
159 __u32 daddr_min; /* inclusive, dest IP address */
160 __u32 daddr_max; /* exclusive, dest IP address */
162 __u16 udp_src_min; /* inclusive, source UDP port */
163 __u16 udp_src_max; /* exclusive, source UDP port */
164 __u16 udp_dst_min; /* inclusive, dest UDP port */
165 __u16 udp_dst_max; /* exclusive, dest UDP port */
167 __u32 src_mac_count; /* How many MACs to iterate through */
168 __u32 dst_mac_count; /* How many MACs to iterate through */
170 unsigned char dst_mac[6];
171 unsigned char src_mac[6];
173 __u32 cur_dst_mac_offset;
174 __u32 cur_src_mac_offset;
182 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
184 We fill in SRC address later
185 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
189 __u16 pad; /* pad out the hh struct to an even 16 bytes */
192 /* proc file names */
196 struct proc_dir_entry *proc_ent;
197 struct proc_dir_entry *busy_proc_ent;
207 static int cpu_speed;
210 /* Module parameters, defaults. */
211 static int count_d = 100000;
213 static int clone_skb_d;
217 static struct pktgen_info pginfos[MAX_PKTGEN];
220 /** Convert to miliseconds */
221 static inline __u64 tv_to_ms(const struct timeval* tv) {
222 __u64 ms = tv->tv_usec / 1000;
223 ms += (__u64)tv->tv_sec * (__u64)1000;
227 static inline __u64 getCurMs(void) {
229 do_gettimeofday(&tv);
230 return tv_to_ms(&tv);
233 #define PG_PROC_DIR "pktgen"
234 static struct proc_dir_entry *proc_dir;
236 static struct net_device *setup_inject(struct pktgen_info* info)
238 struct net_device *odev;
240 odev = dev_get_by_name(info->outdev);
242 sprintf(info->result, "No such netdevice: \"%s\"", info->outdev);
246 if (odev->type != ARPHRD_ETHER) {
247 sprintf(info->result, "Not ethernet device: \"%s\"", info->outdev);
251 if (!netif_running(odev)) {
252 sprintf(info->result, "Device is down: \"%s\"", info->outdev);
256 /* Default to the interface's mac if not explicitly set. */
257 if (!(info->flags & F_SET_SRCMAC)) {
258 memcpy(&(info->hh[6]), odev->dev_addr, 6);
261 memcpy(&(info->hh[6]), info->src_mac, 6);
264 /* Set up Dest MAC */
265 memcpy(&(info->hh[0]), info->dst_mac, 6);
269 if (strlen(info->src_min) == 0) {
270 struct in_device *in_dev;
273 in_dev = __in_dev_get(odev);
275 if (in_dev->ifa_list) {
276 info->saddr_min = in_dev->ifa_list->ifa_address;
277 info->saddr_max = info->saddr_min;
283 info->saddr_min = in_aton(info->src_min);
284 info->saddr_max = in_aton(info->src_max);
287 info->daddr_min = in_aton(info->dst_min);
288 info->daddr_max = in_aton(info->dst_max);
290 /* Initialize current values. */
291 info->cur_dst_mac_offset = 0;
292 info->cur_src_mac_offset = 0;
293 info->cur_saddr = info->saddr_min;
294 info->cur_daddr = info->daddr_min;
295 info->cur_udp_dst = info->udp_dst_min;
296 info->cur_udp_src = info->udp_src_min;
306 static void nanospin(int ipg, struct pktgen_info* info)
308 u32 idle_start, idle;
310 idle_start = cycles();
314 idle = cycles() - idle_start;
315 if (idle * 1000 >= ipg * cpu_speed)
318 info->idle_acc += idle;
321 static int calc_mhz(void)
323 struct timeval start, stop;
324 u32 start_s, elapsed;
326 do_gettimeofday(&start);
330 elapsed = cycles() - start_s;
333 } while (elapsed < 1000 * 50000);
334 do_gettimeofday(&stop);
335 return elapsed/(stop.tv_usec-start.tv_usec+1000000*(stop.tv_sec-start.tv_sec));
338 static void cycles_calibrate(void)
342 for (i = 0; i < 3; i++) {
343 int res = calc_mhz();
350 /* Increment/randomize headers according to flags and current values
351 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
353 static void mod_cur_headers(struct pktgen_info* info) {
357 /* Deal with source MAC */
358 if (info->src_mac_count > 1) {
361 if (info->flags & F_MACSRC_RND) {
362 mc = net_random() % (info->src_mac_count);
365 mc = info->cur_src_mac_offset++;
366 if (info->cur_src_mac_offset > info->src_mac_count) {
367 info->cur_src_mac_offset = 0;
371 tmp = info->src_mac[5] + (mc & 0xFF);
373 tmp = (info->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
375 tmp = (info->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
377 tmp = (info->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
379 tmp = (info->src_mac[1] + (tmp >> 8));
383 /* Deal with Destination MAC */
384 if (info->dst_mac_count > 1) {
387 if (info->flags & F_MACDST_RND) {
388 mc = net_random() % (info->dst_mac_count);
391 mc = info->cur_dst_mac_offset++;
392 if (info->cur_dst_mac_offset > info->dst_mac_count) {
393 info->cur_dst_mac_offset = 0;
397 tmp = info->dst_mac[5] + (mc & 0xFF);
399 tmp = (info->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
401 tmp = (info->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
403 tmp = (info->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
405 tmp = (info->dst_mac[1] + (tmp >> 8));
409 if (info->udp_src_min < info->udp_src_max) {
410 if (info->flags & F_UDPSRC_RND) {
411 info->cur_udp_src = ((net_random() % (info->udp_src_max - info->udp_src_min))
412 + info->udp_src_min);
416 if (info->cur_udp_src >= info->udp_src_max) {
417 info->cur_udp_src = info->udp_src_min;
422 if (info->udp_dst_min < info->udp_dst_max) {
423 if (info->flags & F_UDPDST_RND) {
424 info->cur_udp_dst = ((net_random() % (info->udp_dst_max - info->udp_dst_min))
425 + info->udp_dst_min);
429 if (info->cur_udp_dst >= info->udp_dst_max) {
430 info->cur_udp_dst = info->udp_dst_min;
435 if ((imn = ntohl(info->saddr_min)) < (imx = ntohl(info->saddr_max))) {
437 if (info->flags & F_IPSRC_RND) {
438 t = ((net_random() % (imx - imn)) + imn);
441 t = ntohl(info->cur_saddr);
447 info->cur_saddr = htonl(t);
450 if ((imn = ntohl(info->daddr_min)) < (imx = ntohl(info->daddr_max))) {
452 if (info->flags & F_IPDST_RND) {
453 t = ((net_random() % (imx - imn)) + imn);
456 t = ntohl(info->cur_daddr);
462 info->cur_daddr = htonl(t);
464 }/* mod_cur_headers */
467 static struct sk_buff *fill_packet(struct net_device *odev, struct pktgen_info* info)
469 struct sk_buff *skb = NULL;
474 struct pktgen_hdr *pgh = NULL;
476 skb = alloc_skb(info->pkt_size + 64 + 16, GFP_ATOMIC);
478 sprintf(info->result, "No memory");
482 skb_reserve(skb, 16);
484 /* Reserve for ethernet and IP header */
485 eth = (__u8 *) skb_push(skb, 14);
486 iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr));
487 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
489 /* Update any of the values, used when we're incrementing various
492 mod_cur_headers(info);
494 memcpy(eth, info->hh, 14);
496 datalen = info->pkt_size - 14 - 20 - 8; /* Eth + IPh + UDPh */
497 if (datalen < sizeof(struct pktgen_hdr)) {
498 datalen = sizeof(struct pktgen_hdr);
501 udph->source = htons(info->cur_udp_src);
502 udph->dest = htons(info->cur_udp_dst);
503 udph->len = htons(datalen + 8); /* DATA + udphdr */
504 udph->check = 0; /* No checksum */
510 iph->protocol = IPPROTO_UDP; /* UDP */
511 iph->saddr = info->cur_saddr;
512 iph->daddr = info->cur_daddr;
514 iplen = 20 + 8 + datalen;
515 iph->tot_len = htons(iplen);
517 iph->check = ip_fast_csum((void *) iph, iph->ihl);
518 skb->protocol = __constant_htons(ETH_P_IP);
519 skb->mac.raw = ((u8 *)iph) - 14;
521 skb->pkt_type = PACKET_HOST;
523 if (info->nfrags <= 0) {
524 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
526 int frags = info->nfrags;
529 /* TODO: Verify this is OK...it sure is ugly. --Ben */
530 pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8);
532 if (frags > MAX_SKB_FRAGS)
533 frags = MAX_SKB_FRAGS;
534 if (datalen > frags*PAGE_SIZE) {
535 skb_put(skb, datalen-frags*PAGE_SIZE);
536 datalen = frags*PAGE_SIZE;
540 while (datalen > 0) {
541 struct page *page = alloc_pages(GFP_KERNEL, 0);
542 skb_shinfo(skb)->frags[i].page = page;
543 skb_shinfo(skb)->frags[i].page_offset = 0;
544 skb_shinfo(skb)->frags[i].size =
545 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
546 datalen -= skb_shinfo(skb)->frags[i].size;
547 skb->len += skb_shinfo(skb)->frags[i].size;
548 skb->data_len += skb_shinfo(skb)->frags[i].size;
550 skb_shinfo(skb)->nr_frags = i;
559 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
563 skb_shinfo(skb)->frags[i - 1].size -= rem;
565 skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1];
566 get_page(skb_shinfo(skb)->frags[i].page);
567 skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page;
568 skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size;
569 skb_shinfo(skb)->frags[i].size = rem;
571 skb_shinfo(skb)->nr_frags = i;
575 /* Stamp the time, and sequence number, convert them to network byte order */
577 struct timeval timestamp;
579 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
580 pgh->seq_num = htonl(info->seq_num);
582 do_gettimeofday(×tamp);
583 pgh->tv_sec = htonl(timestamp.tv_sec);
584 pgh->tv_usec = htonl(timestamp.tv_usec);
590 static void show_results(struct pktgen_info* info, int nr_frags)
592 __u64 total, bps, mbps, pps;
594 int size = info->pkt_size + 4; /* incl 32bit ethernet CRC */
595 char *p = info->result;
597 total = (info->stopped_at.tv_sec - info->started_at.tv_sec) * 1000000ull
598 + info->stopped_at.tv_usec - info->started_at.tv_usec;
600 BUG_ON(cpu_speed == 0);
602 idle = info->idle_acc;
603 do_div(idle, cpu_speed);
605 p += sprintf(p, "OK: %llu(c%llu+d%lu) usec, %llu (%dbyte,%dfrags)\n",
606 total, total - idle, idle,
607 info->sofar, size, nr_frags);
609 pps = info->sofar * USEC_PER_SEC;
611 while ((total >> 32) != 0) {
618 bps = pps * 8 * size;
621 do_div(mbps, 1000000);
622 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
623 pps, mbps, bps, info->errors);
626 static void inject(struct pktgen_info* info)
628 struct net_device *odev;
629 struct sk_buff *skb = NULL;
632 int last_ok = 1; /* Was last skb sent?
633 * Or a failed transmit of some sort? This will keep
634 * sequence numbers in order, for example.
639 odev = setup_inject(info);
643 info->do_run_run = 1; /* Cranke yeself! */
646 lcount = info->count;
649 /* Build our initial pkt and place it as a re-try pkt. */
650 skb = fill_packet(odev, info);
651 if (skb == NULL) goto out_reldev;
653 do_gettimeofday(&(info->started_at));
655 while(info->do_run_run) {
657 /* Set a time-stamp, so build a new pkt each time */
660 if (++fp_tmp >= info->clone_skb ) {
662 skb = fill_packet(odev, info);
667 fp_tmp = 0; /* reset counter */
671 if (!(odev->features & NETIF_F_LLTX))
672 spin_lock_bh(&odev->xmit_lock);
673 if (!netif_queue_stopped(odev)) {
675 atomic_inc(&skb->users);
678 ret = odev->hard_start_xmit(skb, odev);
679 if (likely(ret == NETDEV_TX_OK)) {
683 } else if (ret == NETDEV_TX_LOCKED
684 && (odev->features & NETIF_F_LLTX)) {
688 atomic_dec(&skb->users);
689 if (debug && net_ratelimit()) {
690 printk(KERN_INFO "Hard xmit error\n");
697 /* Re-try it next time */
701 if (!(odev->features & NETIF_F_LLTX))
702 spin_unlock_bh(&odev->xmit_lock);
705 /* Try not to busy-spin if we have larger sleep times.
706 * TODO: Investigate better ways to do this.
708 if (info->ipg < 10000) { /* 10 usecs or less */
709 nanospin(info->ipg, info);
711 else if (info->ipg < 10000000) { /* 10ms or less */
712 udelay(info->ipg / 1000);
715 mdelay(info->ipg / 1000000);
719 if (signal_pending(current)) {
723 /* If lcount is zero, then run forever */
724 if ((lcount != 0) && (--lcount == 0)) {
725 if (atomic_read(&skb->users) != 1) {
726 u32 idle_start, idle;
728 idle_start = cycles();
729 while (atomic_read(&skb->users) != 1) {
730 if (signal_pending(current)) {
735 idle = cycles() - idle_start;
736 info->idle_acc += idle;
741 if (netif_queue_stopped(odev) || need_resched()) {
742 u32 idle_start, idle;
744 idle_start = cycles();
746 if (signal_pending(current)) {
747 info->do_run_run = 0;
750 if (!netif_running(odev)) {
751 info->do_run_run = 0;
758 } while (netif_queue_stopped(odev));
759 idle = cycles() - idle_start;
760 info->idle_acc += idle;
762 }/* while we should be running */
764 do_gettimeofday(&(info->stopped_at));
766 show_results(info, skb_shinfo(skb)->nr_frags);
780 /* proc/net/pktgen/pg */
782 static int proc_busy_read(char *buf , char **start, off_t offset,
783 int len, int *eof, void *data)
786 int idx = (int)(long)(data);
787 struct pktgen_info* info = NULL;
789 if ((idx < 0) || (idx >= MAX_PKTGEN)) {
790 printk("ERROR: idx: %i is out of range in proc_write\n", idx);
793 info = &(pginfos[idx]);
796 p += sprintf(p, "%d\n", info->busy);
802 static int proc_read(char *buf , char **start, off_t offset,
803 int len, int *eof, void *data)
807 int idx = (int)(long)(data);
808 struct pktgen_info* info = NULL;
811 __u64 now = getCurMs();
813 if ((idx < 0) || (idx >= MAX_PKTGEN)) {
814 printk("ERROR: idx: %i is out of range in proc_write\n", idx);
817 info = &(pginfos[idx]);
820 p += sprintf(p, "%s\n", VERSION); /* Help with parsing compatibility */
821 p += sprintf(p, "Params: count %llu pkt_size: %u frags: %d ipg: %u clone_skb: %d odev \"%s\"\n",
822 (unsigned long long) info->count,
823 info->pkt_size, info->nfrags, info->ipg,
824 info->clone_skb, info->outdev);
825 p += sprintf(p, " dst_min: %s dst_max: %s src_min: %s src_max: %s\n",
826 info->dst_min, info->dst_max, info->src_min, info->src_max);
827 p += sprintf(p, " src_mac: ");
828 for (i = 0; i < 6; i++) {
829 p += sprintf(p, "%02X%s", info->src_mac[i], i == 5 ? " " : ":");
831 p += sprintf(p, "dst_mac: ");
832 for (i = 0; i < 6; i++) {
833 p += sprintf(p, "%02X%s", info->dst_mac[i], i == 5 ? "\n" : ":");
835 p += sprintf(p, " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
836 info->udp_src_min, info->udp_src_max, info->udp_dst_min,
838 p += sprintf(p, " src_mac_count: %d dst_mac_count: %d\n Flags: ",
839 info->src_mac_count, info->dst_mac_count);
840 if (info->flags & F_IPSRC_RND) {
841 p += sprintf(p, "IPSRC_RND ");
843 if (info->flags & F_IPDST_RND) {
844 p += sprintf(p, "IPDST_RND ");
846 if (info->flags & F_UDPSRC_RND) {
847 p += sprintf(p, "UDPSRC_RND ");
849 if (info->flags & F_UDPDST_RND) {
850 p += sprintf(p, "UDPDST_RND ");
852 if (info->flags & F_MACSRC_RND) {
853 p += sprintf(p, "MACSRC_RND ");
855 if (info->flags & F_MACDST_RND) {
856 p += sprintf(p, "MACDST_RND ");
858 p += sprintf(p, "\n");
860 sa = tv_to_ms(&(info->started_at));
861 stopped = tv_to_ms(&(info->stopped_at));
862 if (info->do_run_run) {
863 stopped = now; /* not really stopped, more like last-running-at */
865 p += sprintf(p, "Current:\n pkts-sofar: %llu errors: %llu\n started: %llums stopped: %llums now: %llums idle: %lluns\n",
866 (unsigned long long) info->sofar,
867 (unsigned long long) info->errors,
868 (unsigned long long) sa,
869 (unsigned long long) stopped,
870 (unsigned long long) now,
871 (unsigned long long) info->idle_acc);
872 p += sprintf(p, " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
873 info->seq_num, info->cur_dst_mac_offset, info->cur_src_mac_offset);
874 p += sprintf(p, " cur_saddr: 0x%x cur_daddr: 0x%x cur_udp_dst: %d cur_udp_src: %d\n",
875 info->cur_saddr, info->cur_daddr, info->cur_udp_dst, info->cur_udp_src);
878 p += sprintf(p, "Result: %s\n", info->result);
880 p += sprintf(p, "Result: Idle\n");
886 static int count_trail_chars(const char __user *user_buffer, unsigned int maxlen)
890 for (i = 0; i < maxlen; i++) {
893 if (get_user(c, &user_buffer[i]))
911 static unsigned long num_arg(const char __user *user_buffer, unsigned long maxlen,
918 for(; i < maxlen; i++) {
921 if (get_user(c, &user_buffer[i]))
923 if ((c >= '0') && (c <= '9')) {
932 static int strn_len(const char __user *user_buffer, unsigned int maxlen)
936 for(; i < maxlen; i++) {
939 if (get_user(c, &user_buffer[i]))
956 static int proc_write(struct file *file, const char __user *user_buffer,
957 unsigned long count, void *data)
960 char name[16], valstr[32];
961 unsigned long value = 0;
962 int idx = (int)(long)(data);
963 struct pktgen_info* info = NULL;
967 if ((idx < 0) || (idx >= MAX_PKTGEN)) {
968 printk("ERROR: idx: %i is out of range in proc_write\n", idx);
971 info = &(pginfos[idx]);
972 result = &(info->result[0]);
975 sprintf(result, "Wrong command format");
980 tmp = count_trail_chars(&user_buffer[i], max);
985 /* Read variable name */
987 len = strn_len(&user_buffer[i], sizeof(name) - 1);
990 memset(name, 0, sizeof(name));
991 if (copy_from_user(name, &user_buffer[i], len))
996 len = count_trail_chars(&user_buffer[i], max);
1002 printk("pg: %s,%lu\n", name, count);
1004 if (!strcmp(name, "stop")) {
1005 if (info->do_run_run) {
1006 strcpy(result, "Stopping");
1009 strcpy(result, "Already stopped...\n");
1011 info->do_run_run = 0;
1015 if (!strcmp(name, "pkt_size")) {
1016 len = num_arg(&user_buffer[i], 10, &value);
1020 if (value < 14+20+8)
1022 info->pkt_size = value;
1023 sprintf(result, "OK: pkt_size=%u", info->pkt_size);
1026 if (!strcmp(name, "frags")) {
1027 len = num_arg(&user_buffer[i], 10, &value);
1031 info->nfrags = value;
1032 sprintf(result, "OK: frags=%u", info->nfrags);
1035 if (!strcmp(name, "ipg")) {
1036 len = num_arg(&user_buffer[i], 10, &value);
1041 sprintf(result, "OK: ipg=%u", info->ipg);
1044 if (!strcmp(name, "udp_src_min")) {
1045 len = num_arg(&user_buffer[i], 10, &value);
1049 info->udp_src_min = value;
1050 sprintf(result, "OK: udp_src_min=%u", info->udp_src_min);
1053 if (!strcmp(name, "udp_dst_min")) {
1054 len = num_arg(&user_buffer[i], 10, &value);
1058 info->udp_dst_min = value;
1059 sprintf(result, "OK: udp_dst_min=%u", info->udp_dst_min);
1062 if (!strcmp(name, "udp_src_max")) {
1063 len = num_arg(&user_buffer[i], 10, &value);
1067 info->udp_src_max = value;
1068 sprintf(result, "OK: udp_src_max=%u", info->udp_src_max);
1071 if (!strcmp(name, "udp_dst_max")) {
1072 len = num_arg(&user_buffer[i], 10, &value);
1076 info->udp_dst_max = value;
1077 sprintf(result, "OK: udp_dst_max=%u", info->udp_dst_max);
1080 if (!strcmp(name, "clone_skb")) {
1081 len = num_arg(&user_buffer[i], 10, &value);
1085 info->clone_skb = value;
1087 sprintf(result, "OK: clone_skb=%d", info->clone_skb);
1090 if (!strcmp(name, "count")) {
1091 len = num_arg(&user_buffer[i], 10, &value);
1095 info->count = value;
1096 sprintf(result, "OK: count=%llu", (unsigned long long) info->count);
1099 if (!strcmp(name, "src_mac_count")) {
1100 len = num_arg(&user_buffer[i], 10, &value);
1104 info->src_mac_count = value;
1105 sprintf(result, "OK: src_mac_count=%d", info->src_mac_count);
1108 if (!strcmp(name, "dst_mac_count")) {
1109 len = num_arg(&user_buffer[i], 10, &value);
1113 info->dst_mac_count = value;
1114 sprintf(result, "OK: dst_mac_count=%d", info->dst_mac_count);
1117 if (!strcmp(name, "odev")) {
1118 len = strn_len(&user_buffer[i], sizeof(info->outdev) - 1);
1121 memset(info->outdev, 0, sizeof(info->outdev));
1122 if (copy_from_user(info->outdev, &user_buffer[i], len))
1125 sprintf(result, "OK: odev=%s", info->outdev);
1128 if (!strcmp(name, "flag")) {
1130 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1134 if (copy_from_user(f, &user_buffer[i], len))
1137 if (strcmp(f, "IPSRC_RND") == 0) {
1138 info->flags |= F_IPSRC_RND;
1140 else if (strcmp(f, "!IPSRC_RND") == 0) {
1141 info->flags &= ~F_IPSRC_RND;
1143 else if (strcmp(f, "IPDST_RND") == 0) {
1144 info->flags |= F_IPDST_RND;
1146 else if (strcmp(f, "!IPDST_RND") == 0) {
1147 info->flags &= ~F_IPDST_RND;
1149 else if (strcmp(f, "UDPSRC_RND") == 0) {
1150 info->flags |= F_UDPSRC_RND;
1152 else if (strcmp(f, "!UDPSRC_RND") == 0) {
1153 info->flags &= ~F_UDPSRC_RND;
1155 else if (strcmp(f, "UDPDST_RND") == 0) {
1156 info->flags |= F_UDPDST_RND;
1158 else if (strcmp(f, "!UDPDST_RND") == 0) {
1159 info->flags &= ~F_UDPDST_RND;
1161 else if (strcmp(f, "MACSRC_RND") == 0) {
1162 info->flags |= F_MACSRC_RND;
1164 else if (strcmp(f, "!MACSRC_RND") == 0) {
1165 info->flags &= ~F_MACSRC_RND;
1167 else if (strcmp(f, "MACDST_RND") == 0) {
1168 info->flags |= F_MACDST_RND;
1170 else if (strcmp(f, "!MACDST_RND") == 0) {
1171 info->flags &= ~F_MACDST_RND;
1174 sprintf(result, "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1176 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND\n");
1179 sprintf(result, "OK: flags=0x%x", info->flags);
1182 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1183 len = strn_len(&user_buffer[i], sizeof(info->dst_min) - 1);
1186 memset(info->dst_min, 0, sizeof(info->dst_min));
1187 if (copy_from_user(info->dst_min, &user_buffer[i], len))
1190 printk("pg: dst_min set to: %s\n", info->dst_min);
1192 sprintf(result, "OK: dst_min=%s", info->dst_min);
1195 if (!strcmp(name, "dst_max")) {
1196 len = strn_len(&user_buffer[i], sizeof(info->dst_max) - 1);
1199 memset(info->dst_max, 0, sizeof(info->dst_max));
1200 if (copy_from_user(info->dst_max, &user_buffer[i], len))
1203 printk("pg: dst_max set to: %s\n", info->dst_max);
1205 sprintf(result, "OK: dst_max=%s", info->dst_max);
1208 if (!strcmp(name, "src_min")) {
1209 len = strn_len(&user_buffer[i], sizeof(info->src_min) - 1);
1212 memset(info->src_min, 0, sizeof(info->src_min));
1213 if (copy_from_user(info->src_min, &user_buffer[i], len))
1216 printk("pg: src_min set to: %s\n", info->src_min);
1218 sprintf(result, "OK: src_min=%s", info->src_min);
1221 if (!strcmp(name, "src_max")) {
1222 len = strn_len(&user_buffer[i], sizeof(info->src_max) - 1);
1225 memset(info->src_max, 0, sizeof(info->src_max));
1226 if (copy_from_user(info->src_max, &user_buffer[i], len))
1229 printk("pg: src_max set to: %s\n", info->src_max);
1231 sprintf(result, "OK: src_max=%s", info->src_max);
1234 if (!strcmp(name, "dstmac")) {
1236 unsigned char *m = info->dst_mac;
1238 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1241 memset(valstr, 0, sizeof(valstr));
1242 if (copy_from_user(valstr, &user_buffer[i], len))
1246 for(*m = 0;*v && m < info->dst_mac + 6; v++) {
1247 if (*v >= '0' && *v <= '9') {
1251 if (*v >= 'A' && *v <= 'F') {
1253 *m += *v - 'A' + 10;
1255 if (*v >= 'a' && *v <= 'f') {
1257 *m += *v - 'a' + 10;
1264 sprintf(result, "OK: dstmac");
1267 if (!strcmp(name, "srcmac")) {
1269 unsigned char *m = info->src_mac;
1271 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1274 memset(valstr, 0, sizeof(valstr));
1275 if (copy_from_user(valstr, &user_buffer[i], len))
1279 for(*m = 0;*v && m < info->src_mac + 6; v++) {
1280 if (*v >= '0' && *v <= '9') {
1284 if (*v >= 'A' && *v <= 'F') {
1286 *m += *v - 'A' + 10;
1288 if (*v >= 'a' && *v <= 'f') {
1290 *m += *v - 'a' + 10;
1297 sprintf(result, "OK: srcmac");
1301 if (!strcmp(name, "inject") || !strcmp(name, "start")) {
1303 strcpy(info->result, "Already running...\n");
1307 strcpy(info->result, "Starting");
1314 sprintf(info->result, "No such parameter \"%s\"", name);
1319 static int create_proc_dir(void)
1322 /* does proc_dir already exists */
1323 len = strlen(PG_PROC_DIR);
1325 for (proc_dir = proc_net->subdir; proc_dir;
1326 proc_dir=proc_dir->next) {
1327 if ((proc_dir->namelen == len) &&
1328 (! memcmp(proc_dir->name, PG_PROC_DIR, len)))
1332 proc_dir = create_proc_entry(PG_PROC_DIR, S_IFDIR, proc_net);
1333 if (!proc_dir) return -ENODEV;
1337 static int remove_proc_dir(void)
1339 remove_proc_entry(PG_PROC_DIR, proc_net);
1343 static int __init init(void)
1348 if (cpu_speed == 0) {
1349 printk("pktgen: Error: your machine does not have working cycle counter.\n");
1355 for (i = 0; i<MAX_PKTGEN; i++) {
1356 memset(&(pginfos[i]), 0, sizeof(pginfos[i]));
1357 pginfos[i].pkt_size = ETH_ZLEN;
1358 pginfos[i].nfrags = 0;
1359 pginfos[i].clone_skb = clone_skb_d;
1360 pginfos[i].ipg = ipg_d;
1361 pginfos[i].count = count_d;
1362 pginfos[i].sofar = 0;
1363 pginfos[i].hh[12] = 0x08; /* fill in protocol. Rest is filled in later. */
1364 pginfos[i].hh[13] = 0x00;
1365 pginfos[i].udp_src_min = 9; /* sink NULL */
1366 pginfos[i].udp_src_max = 9;
1367 pginfos[i].udp_dst_min = 9;
1368 pginfos[i].udp_dst_max = 9;
1370 sprintf(pginfos[i].fname, "net/%s/pg%i", PG_PROC_DIR, i);
1371 pginfos[i].proc_ent = create_proc_entry(pginfos[i].fname, 0600, NULL);
1372 if (!pginfos[i].proc_ent) {
1373 printk("pktgen: Error: cannot create net/%s/pg procfs entry.\n", PG_PROC_DIR);
1376 pginfos[i].proc_ent->read_proc = proc_read;
1377 pginfos[i].proc_ent->write_proc = proc_write;
1378 pginfos[i].proc_ent->data = (void*)(long)(i);
1379 pginfos[i].proc_ent->owner = THIS_MODULE;
1381 sprintf(pginfos[i].busy_fname, "net/%s/pg_busy%i", PG_PROC_DIR, i);
1382 pginfos[i].busy_proc_ent = create_proc_entry(pginfos[i].busy_fname, 0, NULL);
1383 if (!pginfos[i].busy_proc_ent) {
1384 printk("pktgen: Error: cannot create net/%s/pg_busy procfs entry.\n", PG_PROC_DIR);
1387 pginfos[i].busy_proc_ent->read_proc = proc_busy_read;
1388 pginfos[i].busy_proc_ent->data = (void*)(long)(i);
1393 for (i = 0; i<MAX_PKTGEN; i++) {
1394 if (strlen(pginfos[i].fname)) {
1395 remove_proc_entry(pginfos[i].fname, NULL);
1397 if (strlen(pginfos[i].busy_fname)) {
1398 remove_proc_entry(pginfos[i].busy_fname, NULL);
1405 static void __exit cleanup(void)
1408 for (i = 0; i<MAX_PKTGEN; i++) {
1409 if (strlen(pginfos[i].fname)) {
1410 remove_proc_entry(pginfos[i].fname, NULL);
1412 if (strlen(pginfos[i].busy_fname)) {
1413 remove_proc_entry(pginfos[i].busy_fname, NULL);
1420 module_exit(cleanup);
1422 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
1423 MODULE_DESCRIPTION("Packet Generator tool");
1424 MODULE_LICENSE("GPL");
1425 module_param(count_d, int, 0);
1426 module_param(ipg_d, int, 0);
1427 module_param(cpu_speed, int, 0);
1428 module_param(clone_skb_d, int, 0);