2 * $Id: pktgen.c,v 1.1.1.1 2005/04/11 02:51:12 jack 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>
38 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
39 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
40 * as a "fastpath" with a configurable number of clones after alloc's.
42 * clone_skb=0 means all packets are allocated this also means ranges time
43 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
46 * Also moved to /proc/net/pktgen/
49 * See Documentation/networking/pktgen.txt for how to use this.
52 #include <linux/module.h>
53 #include <linux/kernel.h>
54 #include <linux/sched.h>
55 #include <linux/types.h>
56 #include <linux/string.h>
57 #include <linux/ptrace.h>
58 #include <linux/errno.h>
59 #include <linux/ioport.h>
60 #include <linux/slab.h>
61 #include <linux/interrupt.h>
62 #include <linux/pci.h>
63 #include <linux/delay.h>
64 #include <linux/init.h>
65 #include <linux/inet.h>
66 #include <asm/byteorder.h>
67 #include <asm/bitops.h>
70 #include <asm/uaccess.h>
74 #include <linux/udp.h>
75 #include <linux/skbuff.h>
76 #include <linux/netdevice.h>
77 #include <linux/inetdevice.h>
78 #include <linux/rtnetlink.h>
79 #include <linux/proc_fs.h>
80 #include <linux/if_arp.h>
81 #include <net/checksum.h>
82 #include <asm/timex.h>
84 #define cycles() ((u32)get_cycles())
87 #define VERSION "pktgen version 1.2"
88 static char version[] __initdata =
89 "pktgen.c: v1.2: Packet Generator for packet performance testing.\n";
91 /* Used to help with determining the pkts on receive */
93 #define PKTGEN_MAGIC 0xbe9be955
96 /* Keep information per interface */
100 /* If min != max, then we will either do a linear iteration, or
101 * we will do a random selection from within the range.
105 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
106 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
107 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
108 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
109 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
110 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
111 #define F_SET_SRCMAC (1<<6) /* Specify-Src-Mac
112 (default is to use Interface's MAC Addr) */
113 #define F_SET_SRCIP (1<<7) /* Specify-Src-IP
114 (default is to use Interface's IP Addr) */
117 int pkt_size; /* = ETH_ZLEN; */
119 __u32 ipg; /* Default Interpacket gap in nsec */
120 __u64 count; /* Default No packets to send */
121 __u64 sofar; /* How many pkts we've sent so far */
122 __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
123 struct timeval started_at;
124 struct timeval stopped_at;
128 int clone_skb; /* Use multiple SKBs during packet gen. If this number
129 * is greater than 1, then that many coppies of the same
130 * packet will be sent before a new packet is allocated.
131 * For instance, if you want to send 1024 identical packets
132 * before creating a new packet, set clone_skb to 1024.
135 int do_run_run; /* if this changes to false, the test will stop */
143 /* If we're doing ranges, random or incremental, then this
144 * defines the min/max for those ranges.
146 __u32 saddr_min; /* inclusive, source IP address */
147 __u32 saddr_max; /* exclusive, source IP address */
148 __u32 daddr_min; /* inclusive, dest IP address */
149 __u32 daddr_max; /* exclusive, dest IP address */
151 __u16 udp_src_min; /* inclusive, source UDP port */
152 __u16 udp_src_max; /* exclusive, source UDP port */
153 __u16 udp_dst_min; /* inclusive, dest UDP port */
154 __u16 udp_dst_max; /* exclusive, dest UDP port */
156 __u32 src_mac_count; /* How many MACs to iterate through */
157 __u32 dst_mac_count; /* How many MACs to iterate through */
159 unsigned char dst_mac[6];
160 unsigned char src_mac[6];
162 __u32 cur_dst_mac_offset;
163 __u32 cur_src_mac_offset;
171 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
173 We fill in SRC address later
174 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
178 __u16 pad; /* pad out the hh struct to an even 16 bytes */
181 /* proc file names */
185 struct proc_dir_entry *proc_ent;
186 struct proc_dir_entry *busy_proc_ent;
192 struct timeval timestamp;
195 static int cpu_speed;
198 /* Module parameters, defaults. */
199 static int count_d = 100000;
200 static int ipg_d = 0;
201 static int clone_skb_d = 0;
205 static struct pktgen_info pginfos[MAX_PKTGEN];
208 /** Convert to miliseconds */
209 inline __u64 tv_to_ms(const struct timeval* tv) {
210 __u64 ms = tv->tv_usec / 1000;
211 ms += (__u64)tv->tv_sec * (__u64)1000;
215 inline __u64 getCurMs(void) {
217 do_gettimeofday(&tv);
218 return tv_to_ms(&tv);
221 #define PG_PROC_DIR "pktgen"
222 static struct proc_dir_entry *proc_dir = 0;
224 static struct net_device *setup_inject(struct pktgen_info* info)
226 struct net_device *odev;
229 odev = __dev_get_by_name(info->outdev);
231 sprintf(info->result, "No such netdevice: \"%s\"", info->outdev);
235 if (odev->type != ARPHRD_ETHER) {
236 sprintf(info->result, "Not ethernet device: \"%s\"", info->outdev);
240 if (!netif_running(odev)) {
241 sprintf(info->result, "Device is down: \"%s\"", info->outdev);
245 /* Default to the interface's mac if not explicitly set. */
246 if (!(info->flags & F_SET_SRCMAC)) {
247 memcpy(&(info->hh[6]), odev->dev_addr, 6);
250 memcpy(&(info->hh[6]), info->src_mac, 6);
253 /* Set up Dest MAC */
254 memcpy(&(info->hh[0]), info->dst_mac, 6);
258 if (strlen(info->src_min) == 0) {
260 struct in_device *in_dev = odev->ip_ptr;
262 if (in_dev->ifa_list) {
263 info->saddr_min = in_dev->ifa_list->ifa_address;
264 info->saddr_max = info->saddr_min;
269 info->saddr_min = in_aton(info->src_min);
270 info->saddr_max = in_aton(info->src_max);
273 info->daddr_min = in_aton(info->dst_min);
274 info->daddr_max = in_aton(info->dst_max);
276 /* Initialize current values. */
277 info->cur_dst_mac_offset = 0;
278 info->cur_src_mac_offset = 0;
279 info->cur_saddr = info->saddr_min;
280 info->cur_daddr = info->daddr_min;
281 info->cur_udp_dst = info->udp_dst_min;
282 info->cur_udp_src = info->udp_src_min;
284 atomic_inc(&odev->refcnt);
294 static void nanospin(int ipg, struct pktgen_info* info)
296 u32 idle_start, idle;
298 idle_start = cycles();
302 idle = cycles() - idle_start;
303 if (idle * 1000 >= ipg * cpu_speed)
306 info->idle_acc += idle;
309 static int calc_mhz(void)
311 struct timeval start, stop;
312 u32 start_s, elapsed;
314 do_gettimeofday(&start);
318 elapsed = cycles() - start_s;
321 } while (elapsed < 1000 * 50000);
322 do_gettimeofday(&stop);
323 return elapsed/(stop.tv_usec-start.tv_usec+1000000*(stop.tv_sec-start.tv_sec));
326 static void cycles_calibrate(void)
330 for (i = 0; i < 3; i++) {
331 int res = calc_mhz();
338 /* Increment/randomize headers according to flags and current values
339 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
341 static void mod_cur_headers(struct pktgen_info* info) {
345 /* Deal with source MAC */
346 if (info->src_mac_count > 1) {
349 if (info->flags & F_MACSRC_RND) {
350 mc = net_random() % (info->src_mac_count);
353 mc = info->cur_src_mac_offset++;
354 if (info->cur_src_mac_offset > info->src_mac_count) {
355 info->cur_src_mac_offset = 0;
359 tmp = info->src_mac[5] + (mc & 0xFF);
361 tmp = (info->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
363 tmp = (info->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
365 tmp = (info->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
367 tmp = (info->src_mac[1] + (tmp >> 8));
371 /* Deal with Destination MAC */
372 if (info->dst_mac_count > 1) {
375 if (info->flags & F_MACDST_RND) {
376 mc = net_random() % (info->dst_mac_count);
379 mc = info->cur_dst_mac_offset++;
380 if (info->cur_dst_mac_offset > info->dst_mac_count) {
381 info->cur_dst_mac_offset = 0;
385 tmp = info->dst_mac[5] + (mc & 0xFF);
387 tmp = (info->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
389 tmp = (info->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
391 tmp = (info->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
393 tmp = (info->dst_mac[1] + (tmp >> 8));
397 if (info->udp_src_min < info->udp_src_max) {
398 if (info->flags & F_UDPSRC_RND) {
399 info->cur_udp_src = ((net_random() % (info->udp_src_max - info->udp_src_min))
400 + info->udp_src_min);
404 if (info->cur_udp_src >= info->udp_src_max) {
405 info->cur_udp_src = info->udp_src_min;
410 if (info->udp_dst_min < info->udp_dst_max) {
411 if (info->flags & F_UDPDST_RND) {
412 info->cur_udp_dst = ((net_random() % (info->udp_dst_max - info->udp_dst_min))
413 + info->udp_dst_min);
417 if (info->cur_udp_dst >= info->udp_dst_max) {
418 info->cur_udp_dst = info->udp_dst_min;
423 if ((imn = ntohl(info->saddr_min)) < (imx = ntohl(info->saddr_max))) {
425 if (info->flags & F_IPSRC_RND) {
426 t = ((net_random() % (imx - imn)) + imn);
429 t = ntohl(info->cur_saddr);
435 info->cur_saddr = htonl(t);
438 if ((imn = ntohl(info->daddr_min)) < (imx = ntohl(info->daddr_max))) {
440 if (info->flags & F_IPDST_RND) {
441 t = ((net_random() % (imx - imn)) + imn);
444 t = ntohl(info->cur_daddr);
450 info->cur_daddr = htonl(t);
452 }/* mod_cur_headers */
455 static struct sk_buff *fill_packet(struct net_device *odev, struct pktgen_info* info)
457 struct sk_buff *skb = NULL;
462 struct pktgen_hdr *pgh = NULL;
464 skb = alloc_skb(info->pkt_size + 64 + 16, GFP_ATOMIC);
466 sprintf(info->result, "No memory");
470 skb_reserve(skb, 16);
472 /* Reserve for ethernet and IP header */
473 eth = (__u8 *) skb_push(skb, 14);
474 iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr));
475 udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
477 /* Update any of the values, used when we're incrementing various
480 mod_cur_headers(info);
482 memcpy(eth, info->hh, 14);
484 datalen = info->pkt_size - 14 - 20 - 8; /* Eth + IPh + UDPh */
485 if (datalen < sizeof(struct pktgen_hdr)) {
486 datalen = sizeof(struct pktgen_hdr);
489 udph->source = htons(info->cur_udp_src);
490 udph->dest = htons(info->cur_udp_dst);
491 udph->len = htons(datalen + 8); /* DATA + udphdr */
492 udph->check = 0; /* No checksum */
498 iph->protocol = IPPROTO_UDP; /* UDP */
499 iph->saddr = info->cur_saddr;
500 iph->daddr = info->cur_daddr;
502 iplen = 20 + 8 + datalen;
503 iph->tot_len = htons(iplen);
505 iph->check = ip_fast_csum((void *) iph, iph->ihl);
506 skb->protocol = __constant_htons(ETH_P_IP);
507 skb->mac.raw = ((u8 *)iph) - 14;
509 skb->pkt_type = PACKET_HOST;
511 if (info->nfrags <= 0) {
512 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
514 int frags = info->nfrags;
517 /* TODO: Verify this is OK...it sure is ugly. --Ben */
518 pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8);
520 if (frags > MAX_SKB_FRAGS)
521 frags = MAX_SKB_FRAGS;
522 if (datalen > frags*PAGE_SIZE) {
523 skb_put(skb, datalen-frags*PAGE_SIZE);
524 datalen = frags*PAGE_SIZE;
528 while (datalen > 0) {
529 struct page *page = alloc_pages(GFP_KERNEL, 0);
530 skb_shinfo(skb)->frags[i].page = page;
531 skb_shinfo(skb)->frags[i].page_offset = 0;
532 skb_shinfo(skb)->frags[i].size =
533 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
534 datalen -= skb_shinfo(skb)->frags[i].size;
535 skb->len += skb_shinfo(skb)->frags[i].size;
536 skb->data_len += skb_shinfo(skb)->frags[i].size;
538 skb_shinfo(skb)->nr_frags = i;
547 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
551 skb_shinfo(skb)->frags[i - 1].size -= rem;
553 skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1];
554 get_page(skb_shinfo(skb)->frags[i].page);
555 skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page;
556 skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size;
557 skb_shinfo(skb)->frags[i].size = rem;
559 skb_shinfo(skb)->nr_frags = i;
563 /* Stamp the time, and sequence number, convert them to network byte order */
565 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
566 do_gettimeofday(&(pgh->timestamp));
567 pgh->timestamp.tv_usec = htonl(pgh->timestamp.tv_usec);
568 pgh->timestamp.tv_sec = htonl(pgh->timestamp.tv_sec);
569 pgh->seq_num = htonl(info->seq_num);
576 static void inject(struct pktgen_info* info)
578 struct net_device *odev = NULL;
579 struct sk_buff *skb = NULL;
584 int last_ok = 1; /* Was last skb sent?
585 * Or a failed transmit of some sort? This will keep
586 * sequence numbers in order, for example.
591 odev = setup_inject(info);
595 info->do_run_run = 1; /* Cranke yeself! */
598 lcount = info->count;
601 /* Build our initial pkt and place it as a re-try pkt. */
602 skb = fill_packet(odev, info);
603 if (skb == NULL) goto out_reldev;
605 do_gettimeofday(&(info->started_at));
607 while(info->do_run_run) {
609 /* Set a time-stamp, so build a new pkt each time */
612 if (++fp_tmp >= info->clone_skb ) {
614 skb = fill_packet(odev, info);
619 fp_tmp = 0; /* reset counter */
621 atomic_inc(&skb->users);
624 nr_frags = skb_shinfo(skb)->nr_frags;
626 spin_lock_bh(&odev->xmit_lock);
627 if (!netif_queue_stopped(odev)) {
629 if (odev->hard_start_xmit(skb, odev)) {
630 if (net_ratelimit()) {
631 printk(KERN_INFO "Hard xmit error\n");
643 /* Re-try it next time */
648 spin_unlock_bh(&odev->xmit_lock);
651 /* Try not to busy-spin if we have larger sleep times.
652 * TODO: Investigate better ways to do this.
654 if (info->ipg < 10000) { /* 10 usecs or less */
655 nanospin(info->ipg, info);
657 else if (info->ipg < 10000000) { /* 10ms or less */
658 udelay(info->ipg / 1000);
661 mdelay(info->ipg / 1000000);
665 if (signal_pending(current)) {
669 /* If lcount is zero, then run forever */
670 if ((lcount != 0) && (--lcount == 0)) {
671 if (atomic_read(&skb->users) != 1) {
672 u32 idle_start, idle;
674 idle_start = cycles();
675 while (atomic_read(&skb->users) != 1) {
676 if (signal_pending(current)) {
681 idle = cycles() - idle_start;
682 info->idle_acc += idle;
687 if (netif_queue_stopped(odev) || current->need_resched) {
688 u32 idle_start, idle;
690 idle_start = cycles();
692 if (signal_pending(current)) {
693 info->do_run_run = 0;
696 if (!netif_running(odev)) {
697 info->do_run_run = 0;
700 if (current->need_resched)
704 } while (netif_queue_stopped(odev));
705 idle = cycles() - idle_start;
706 info->idle_acc += idle;
708 }/* while we should be running */
710 do_gettimeofday(&(info->stopped_at));
712 total = (info->stopped_at.tv_sec - info->started_at.tv_sec) * 1000000 +
713 info->stopped_at.tv_usec - info->started_at.tv_usec;
715 idle = (__u32)(info->idle_acc)/(__u32)(cpu_speed);
718 char *p = info->result;
719 __u64 pps = (__u32)(info->sofar * 1000) / ((__u32)(total) / 1000);
720 __u64 bps = pps * 8 * (info->pkt_size + 4); /* take 32bit ethernet CRC into account */
721 p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags) %llupps %lluMb/sec (%llubps) errors: %llu",
722 (unsigned long long) total,
723 (unsigned long long) (total - idle),
724 (unsigned long long) idle,
725 (unsigned long long) info->sofar,
726 skb->len + 4, /* Add 4 to account for the ethernet checksum */
728 (unsigned long long) pps,
729 (unsigned long long) (bps / (u64) 1024 / (u64) 1024),
730 (unsigned long long) bps,
731 (unsigned long long) info->errors
741 /* TODO: Is this worth printing out (other than for debug?) */
742 printk("fp = %llu\n", (unsigned long long) fp);
747 /* proc/net/pktgen/pg */
749 static int proc_busy_read(char *buf , char **start, off_t offset,
750 int len, int *eof, void *data)
753 int idx = (int)(long)(data);
754 struct pktgen_info* info = NULL;
756 if ((idx < 0) || (idx >= MAX_PKTGEN)) {
757 printk("ERROR: idx: %i is out of range in proc_write\n", idx);
760 info = &(pginfos[idx]);
763 p += sprintf(p, "%d\n", info->busy);
769 static int proc_read(char *buf , char **start, off_t offset,
770 int len, int *eof, void *data)
774 int idx = (int)(long)(data);
775 struct pktgen_info* info = NULL;
778 __u64 now = getCurMs();
780 if ((idx < 0) || (idx >= MAX_PKTGEN)) {
781 printk("ERROR: idx: %i is out of range in proc_write\n", idx);
784 info = &(pginfos[idx]);
787 p += sprintf(p, "%s\n", VERSION); /* Help with parsing compatibility */
788 p += sprintf(p, "Params: count %llu pkt_size: %u frags: %d ipg: %u clone_skb: %d odev \"%s\"\n",
789 (unsigned long long) info->count,
790 info->pkt_size, info->nfrags, info->ipg,
791 info->clone_skb, info->outdev);
792 p += sprintf(p, " dst_min: %s dst_max: %s src_min: %s src_max: %s\n",
793 info->dst_min, info->dst_max, info->src_min, info->src_max);
794 p += sprintf(p, " src_mac: ");
795 for (i = 0; i < 6; i++) {
796 p += sprintf(p, "%02X%s", info->src_mac[i], i == 5 ? " " : ":");
798 p += sprintf(p, "dst_mac: ");
799 for (i = 0; i < 6; i++) {
800 p += sprintf(p, "%02X%s", info->dst_mac[i], i == 5 ? "\n" : ":");
802 p += sprintf(p, " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
803 info->udp_src_min, info->udp_src_max, info->udp_dst_min,
805 p += sprintf(p, " src_mac_count: %d dst_mac_count: %d\n Flags: ",
806 info->src_mac_count, info->dst_mac_count);
807 if (info->flags & F_IPSRC_RND) {
808 p += sprintf(p, "IPSRC_RND ");
810 if (info->flags & F_IPDST_RND) {
811 p += sprintf(p, "IPDST_RND ");
813 if (info->flags & F_UDPSRC_RND) {
814 p += sprintf(p, "UDPSRC_RND ");
816 if (info->flags & F_UDPDST_RND) {
817 p += sprintf(p, "UDPDST_RND ");
819 if (info->flags & F_MACSRC_RND) {
820 p += sprintf(p, "MACSRC_RND ");
822 if (info->flags & F_MACDST_RND) {
823 p += sprintf(p, "MACDST_RND ");
825 p += sprintf(p, "\n");
827 sa = tv_to_ms(&(info->started_at));
828 stopped = tv_to_ms(&(info->stopped_at));
829 if (info->do_run_run) {
830 stopped = now; /* not really stopped, more like last-running-at */
832 p += sprintf(p, "Current:\n pkts-sofar: %llu errors: %llu\n started: %llums stopped: %llums now: %llums idle: %lluns\n",
833 (unsigned long long) info->sofar,
834 (unsigned long long) info->errors,
835 (unsigned long long) sa,
836 (unsigned long long) stopped,
837 (unsigned long long) now,
838 (unsigned long long) info->idle_acc);
839 p += sprintf(p, " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
840 info->seq_num, info->cur_dst_mac_offset, info->cur_src_mac_offset);
841 p += sprintf(p, " cur_saddr: 0x%x cur_daddr: 0x%x cur_udp_dst: %d cur_udp_src: %d\n",
842 info->cur_saddr, info->cur_daddr, info->cur_udp_dst, info->cur_udp_src);
845 p += sprintf(p, "Result: %s\n", info->result);
847 p += sprintf(p, "Result: Idle\n");
853 static int count_trail_chars(const char *user_buffer, unsigned int maxlen)
857 for (i = 0; i < maxlen; i++) {
860 if (get_user(c, &user_buffer[i]))
878 static unsigned long num_arg(const char *user_buffer, unsigned long maxlen,
885 for(; i < maxlen; i++) {
888 if (get_user(c, &user_buffer[i]))
890 if ((c >= '0') && (c <= '9')) {
899 static int strn_len(const char *user_buffer, unsigned int maxlen)
903 for(; i < maxlen; i++) {
906 if (get_user(c, &user_buffer[i]))
923 static int proc_write(struct file *file, const char *user_buffer,
924 unsigned long count, void *data)
927 char name[16], valstr[32];
928 unsigned long value = 0;
929 int idx = (int)(long)(data);
930 struct pktgen_info* info = NULL;
934 if ((idx < 0) || (idx >= MAX_PKTGEN)) {
935 printk("ERROR: idx: %i is out of range in proc_write\n", idx);
938 info = &(pginfos[idx]);
939 result = &(info->result[0]);
942 sprintf(result, "Wrong command format");
947 tmp = count_trail_chars(&user_buffer[i], max);
952 /* Read variable name */
954 len = strn_len(&user_buffer[i], sizeof(name) - 1);
957 memset(name, 0, sizeof(name));
958 copy_from_user(name, &user_buffer[i], len);
962 len = count_trail_chars(&user_buffer[i], max);
968 printk("pg: %s,%lu\n", name, count);
970 if (!strcmp(name, "stop")) {
971 if (info->do_run_run) {
972 strcpy(result, "Stopping");
975 strcpy(result, "Already stopped...\n");
977 info->do_run_run = 0;
981 if (!strcmp(name, "pkt_size")) {
982 len = num_arg(&user_buffer[i], 10, &value);
988 info->pkt_size = value;
989 sprintf(result, "OK: pkt_size=%u", info->pkt_size);
992 if (!strcmp(name, "frags")) {
993 len = num_arg(&user_buffer[i], 10, &value);
997 info->nfrags = value;
998 sprintf(result, "OK: frags=%u", info->nfrags);
1001 if (!strcmp(name, "ipg")) {
1002 len = num_arg(&user_buffer[i], 10, &value);
1007 sprintf(result, "OK: ipg=%u", info->ipg);
1010 if (!strcmp(name, "udp_src_min")) {
1011 len = num_arg(&user_buffer[i], 10, &value);
1015 info->udp_src_min = value;
1016 sprintf(result, "OK: udp_src_min=%u", info->udp_src_min);
1019 if (!strcmp(name, "udp_dst_min")) {
1020 len = num_arg(&user_buffer[i], 10, &value);
1024 info->udp_dst_min = value;
1025 sprintf(result, "OK: udp_dst_min=%u", info->udp_dst_min);
1028 if (!strcmp(name, "udp_src_max")) {
1029 len = num_arg(&user_buffer[i], 10, &value);
1033 info->udp_src_max = value;
1034 sprintf(result, "OK: udp_src_max=%u", info->udp_src_max);
1037 if (!strcmp(name, "udp_dst_max")) {
1038 len = num_arg(&user_buffer[i], 10, &value);
1042 info->udp_dst_max = value;
1043 sprintf(result, "OK: udp_dst_max=%u", info->udp_dst_max);
1046 if (!strcmp(name, "clone_skb")) {
1047 len = num_arg(&user_buffer[i], 10, &value);
1051 info->clone_skb = value;
1053 sprintf(result, "OK: clone_skb=%d", info->clone_skb);
1056 if (!strcmp(name, "count")) {
1057 len = num_arg(&user_buffer[i], 10, &value);
1061 info->count = value;
1062 sprintf(result, "OK: count=%llu", (unsigned long long) info->count);
1065 if (!strcmp(name, "src_mac_count")) {
1066 len = num_arg(&user_buffer[i], 10, &value);
1070 info->src_mac_count = value;
1071 sprintf(result, "OK: src_mac_count=%d", info->src_mac_count);
1074 if (!strcmp(name, "dst_mac_count")) {
1075 len = num_arg(&user_buffer[i], 10, &value);
1079 info->dst_mac_count = value;
1080 sprintf(result, "OK: dst_mac_count=%d", info->dst_mac_count);
1083 if (!strcmp(name, "odev")) {
1084 len = strn_len(&user_buffer[i], sizeof(info->outdev) - 1);
1087 memset(info->outdev, 0, sizeof(info->outdev));
1088 copy_from_user(info->outdev, &user_buffer[i], len);
1090 sprintf(result, "OK: odev=%s", info->outdev);
1093 if (!strcmp(name, "flag")) {
1096 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1099 copy_from_user(f, &user_buffer[i], len);
1101 if (strcmp(f, "IPSRC_RND") == 0) {
1102 info->flags |= F_IPSRC_RND;
1104 else if (strcmp(f, "!IPSRC_RND") == 0) {
1105 info->flags &= ~F_IPSRC_RND;
1107 else if (strcmp(f, "IPDST_RND") == 0) {
1108 info->flags |= F_IPDST_RND;
1110 else if (strcmp(f, "!IPDST_RND") == 0) {
1111 info->flags &= ~F_IPDST_RND;
1113 else if (strcmp(f, "UDPSRC_RND") == 0) {
1114 info->flags |= F_UDPSRC_RND;
1116 else if (strcmp(f, "!UDPSRC_RND") == 0) {
1117 info->flags &= ~F_UDPSRC_RND;
1119 else if (strcmp(f, "UDPDST_RND") == 0) {
1120 info->flags |= F_UDPDST_RND;
1122 else if (strcmp(f, "!UDPDST_RND") == 0) {
1123 info->flags &= ~F_UDPDST_RND;
1125 else if (strcmp(f, "MACSRC_RND") == 0) {
1126 info->flags |= F_MACSRC_RND;
1128 else if (strcmp(f, "!MACSRC_RND") == 0) {
1129 info->flags &= ~F_MACSRC_RND;
1131 else if (strcmp(f, "MACDST_RND") == 0) {
1132 info->flags |= F_MACDST_RND;
1134 else if (strcmp(f, "!MACDST_RND") == 0) {
1135 info->flags &= ~F_MACDST_RND;
1138 sprintf(result, "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1140 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND\n");
1143 sprintf(result, "OK: flags=0x%x", info->flags);
1146 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1147 len = strn_len(&user_buffer[i], sizeof(info->dst_min) - 1);
1150 memset(info->dst_min, 0, sizeof(info->dst_min));
1151 copy_from_user(info->dst_min, &user_buffer[i], len);
1153 printk("pg: dst_min set to: %s\n", info->dst_min);
1155 sprintf(result, "OK: dst_min=%s", info->dst_min);
1158 if (!strcmp(name, "dst_max")) {
1159 len = strn_len(&user_buffer[i], sizeof(info->dst_max) - 1);
1162 memset(info->dst_max, 0, sizeof(info->dst_max));
1163 copy_from_user(info->dst_max, &user_buffer[i], len);
1165 printk("pg: dst_max set to: %s\n", info->dst_max);
1167 sprintf(result, "OK: dst_max=%s", info->dst_max);
1170 if (!strcmp(name, "src_min")) {
1171 len = strn_len(&user_buffer[i], sizeof(info->src_min) - 1);
1174 memset(info->src_min, 0, sizeof(info->src_min));
1175 copy_from_user(info->src_min, &user_buffer[i], len);
1177 printk("pg: src_min set to: %s\n", info->src_min);
1179 sprintf(result, "OK: src_min=%s", info->src_min);
1182 if (!strcmp(name, "src_max")) {
1183 len = strn_len(&user_buffer[i], sizeof(info->src_max) - 1);
1186 memset(info->src_max, 0, sizeof(info->src_max));
1187 copy_from_user(info->src_max, &user_buffer[i], len);
1189 printk("pg: src_max set to: %s\n", info->src_max);
1191 sprintf(result, "OK: src_max=%s", info->src_max);
1194 if (!strcmp(name, "dstmac")) {
1196 unsigned char *m = info->dst_mac;
1198 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1201 memset(valstr, 0, sizeof(valstr));
1202 copy_from_user(valstr, &user_buffer[i], len);
1205 for(*m = 0;*v && m < info->dst_mac + 6; v++) {
1206 if (*v >= '0' && *v <= '9') {
1210 if (*v >= 'A' && *v <= 'F') {
1212 *m += *v - 'A' + 10;
1214 if (*v >= 'a' && *v <= 'f') {
1216 *m += *v - 'a' + 10;
1223 sprintf(result, "OK: dstmac");
1226 if (!strcmp(name, "srcmac")) {
1228 unsigned char *m = info->src_mac;
1230 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1233 memset(valstr, 0, sizeof(valstr));
1234 copy_from_user(valstr, &user_buffer[i], len);
1237 for(*m = 0;*v && m < info->src_mac + 6; v++) {
1238 if (*v >= '0' && *v <= '9') {
1242 if (*v >= 'A' && *v <= 'F') {
1244 *m += *v - 'A' + 10;
1246 if (*v >= 'a' && *v <= 'f') {
1248 *m += *v - 'a' + 10;
1255 sprintf(result, "OK: srcmac");
1259 if (!strcmp(name, "inject") || !strcmp(name, "start")) {
1262 strcpy(info->result, "Already running...\n");
1266 strcpy(info->result, "Starting");
1274 sprintf(info->result, "No such parameter \"%s\"", name);
1279 int create_proc_dir(void)
1282 /* does proc_dir already exists */
1283 len = strlen(PG_PROC_DIR);
1285 for (proc_dir = proc_net->subdir; proc_dir;
1286 proc_dir=proc_dir->next) {
1287 if ((proc_dir->namelen == len) &&
1288 (! memcmp(proc_dir->name, PG_PROC_DIR, len)))
1292 proc_dir = create_proc_entry(PG_PROC_DIR, S_IFDIR, proc_net);
1293 if (!proc_dir) return -ENODEV;
1297 int remove_proc_dir(void)
1299 remove_proc_entry(PG_PROC_DIR, proc_net);
1303 static int __init init(void)
1308 if (cpu_speed == 0) {
1309 printk("pktgen: Error: your machine does not have working cycle counter.\n");
1315 for (i = 0; i<MAX_PKTGEN; i++) {
1316 memset(&(pginfos[i]), 0, sizeof(pginfos[i]));
1317 pginfos[i].pkt_size = ETH_ZLEN;
1318 pginfos[i].nfrags = 0;
1319 pginfos[i].clone_skb = clone_skb_d;
1320 pginfos[i].ipg = ipg_d;
1321 pginfos[i].count = count_d;
1322 pginfos[i].sofar = 0;
1323 pginfos[i].hh[12] = 0x08; /* fill in protocol. Rest is filled in later. */
1324 pginfos[i].hh[13] = 0x00;
1325 pginfos[i].udp_src_min = 9; /* sink NULL */
1326 pginfos[i].udp_src_max = 9;
1327 pginfos[i].udp_dst_min = 9;
1328 pginfos[i].udp_dst_max = 9;
1330 sprintf(pginfos[i].fname, "net/%s/pg%i", PG_PROC_DIR, i);
1331 pginfos[i].proc_ent = create_proc_entry(pginfos[i].fname, 0600, 0);
1332 if (!pginfos[i].proc_ent) {
1333 printk("pktgen: Error: cannot create net/%s/pg procfs entry.\n", PG_PROC_DIR);
1336 pginfos[i].proc_ent->read_proc = proc_read;
1337 pginfos[i].proc_ent->write_proc = proc_write;
1338 pginfos[i].proc_ent->data = (void*)(long)(i);
1340 sprintf(pginfos[i].busy_fname, "net/%s/pg_busy%i", PG_PROC_DIR, i);
1341 pginfos[i].busy_proc_ent = create_proc_entry(pginfos[i].busy_fname, 0, 0);
1342 if (!pginfos[i].busy_proc_ent) {
1343 printk("pktgen: Error: cannot create net/%s/pg_busy procfs entry.\n", PG_PROC_DIR);
1346 pginfos[i].busy_proc_ent->read_proc = proc_busy_read;
1347 pginfos[i].busy_proc_ent->data = (void*)(long)(i);
1352 for (i = 0; i<MAX_PKTGEN; i++) {
1353 if (strlen(pginfos[i].fname)) {
1354 remove_proc_entry(pginfos[i].fname, NULL);
1356 if (strlen(pginfos[i].busy_fname)) {
1357 remove_proc_entry(pginfos[i].busy_fname, NULL);
1364 static void __exit cleanup(void)
1367 for (i = 0; i<MAX_PKTGEN; i++) {
1368 if (strlen(pginfos[i].fname)) {
1369 remove_proc_entry(pginfos[i].fname, NULL);
1371 if (strlen(pginfos[i].busy_fname)) {
1372 remove_proc_entry(pginfos[i].busy_fname, NULL);
1379 module_exit(cleanup);
1381 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
1382 MODULE_DESCRIPTION("Packet Generator tool");
1383 MODULE_LICENSE("GPL");
1384 MODULE_PARM(count_d, "i");
1385 MODULE_PARM(ipg_d, "i");
1386 MODULE_PARM(cpu_speed, "i");
1387 MODULE_PARM(clone_skb_d, "i");