File: [Development] / linux-2.6-xfs / net / core / pktgen.c (download)
Revision 1.4, Thu Jun 17 03:20:52 2004 UTC (13 years, 4 months ago) by nathans
Branch: MAIN
Changes since 1.3: +4 -4
lines
Merge up to 2.6.7, and upgrade kdb at the same time.
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/* -*-linux-c-*-
* $Id: pktgen.c,v 1.8 2002/07/15 19:30:17 robert Exp $
* pktgen.c: Packet Generator for performance evaluation.
*
* Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
* Uppsala University, Sweden
*
* A tool for loading the network with preconfigurated packets.
* The tool is implemented as a linux module. Parameters are output
* device, IPG (interpacket gap), number of packets, and whether
* to use multiple SKBs or just the same one.
* pktgen uses the installed interface's output routine.
*
* Additional hacking by:
*
* Jens.Laas@data.slu.se
* Improved by ANK. 010120.
* Improved by ANK even more. 010212.
* MAC address typo fixed. 010417 --ro
* Integrated. 020301 --DaveM
* Added multiskb option 020301 --DaveM
* Scaling of results. 020417--sigurdur@linpro.no
* Significant re-work of the module:
* * Updated to support generation over multiple interfaces at once
* by creating 32 /proc/net/pg* files. Each file can be manipulated
* individually.
* * Converted many counters to __u64 to allow longer runs.
* * Allow configuration of ranges, like min/max IP address, MACs,
* and UDP-ports, for both source and destination, and can
* set to use a random distribution or sequentially walk the range.
* * Can now change some values after starting.
* * Place 12-byte packet in UDP payload with magic number,
* sequence number, and timestamp. Will write receiver next.
* * The new changes seem to have a performance impact of around 1%,
* as far as I can tell.
* --Ben Greear <greearb@candelatech.com>
* Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
*
* Renamed multiskb to clone_skb and cleaned up sending core for two distinct
* skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
* as a "fastpath" with a configurable number of clones after alloc's.
*
* clone_skb=0 means all packets are allocated this also means ranges time
* stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
* clones.
*
* Also moved to /proc/net/pktgen/
* --ro
*
* Fix refcount off by one if first packet fails, potential null deref,
* memleak 030710- KJP
*
* Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
*
* See Documentation/networking/pktgen.txt for how to use this.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/inet.h>
#include <asm/byteorder.h>
#include <asm/bitops.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/uaccess.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/udp.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/inetdevice.h>
#include <linux/rtnetlink.h>
#include <linux/proc_fs.h>
#include <linux/if_arp.h>
#include <net/checksum.h>
#include <asm/timex.h>
#define cycles() ((u32)get_cycles())
#define VERSION "pktgen version 1.32"
static char version[] __initdata =
"pktgen.c: v1.3: Packet Generator for packet performance testing.\n";
/* Used to help with determining the pkts on receive */
#define PKTGEN_MAGIC 0xbe9be955
/* Keep information per interface */
struct pktgen_info {
/* Parameters */
/* If min != max, then we will either do a linear iteration, or
* we will do a random selection from within the range.
*/
__u32 flags;
#define F_IPSRC_RND (1<<0) /* IP-Src Random */
#define F_IPDST_RND (1<<1) /* IP-Dst Random */
#define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
#define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
#define F_MACSRC_RND (1<<4) /* MAC-Src Random */
#define F_MACDST_RND (1<<5) /* MAC-Dst Random */
#define F_SET_SRCMAC (1<<6) /* Specify-Src-Mac
(default is to use Interface's MAC Addr) */
#define F_SET_SRCIP (1<<7) /* Specify-Src-IP
(default is to use Interface's IP Addr) */
int pkt_size; /* = ETH_ZLEN; */
int nfrags;
__u32 ipg; /* Default Interpacket gap in nsec */
__u64 count; /* Default No packets to send */
__u64 sofar; /* How many pkts we've sent so far */
__u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
struct timeval started_at;
struct timeval stopped_at;
__u64 idle_acc;
__u32 seq_num;
int clone_skb; /* Use multiple SKBs during packet gen. If this number
* is greater than 1, then that many coppies of the same
* packet will be sent before a new packet is allocated.
* For instance, if you want to send 1024 identical packets
* before creating a new packet, set clone_skb to 1024.
*/
int busy;
int do_run_run; /* if this changes to false, the test will stop */
char outdev[32];
char dst_min[32];
char dst_max[32];
char src_min[32];
char src_max[32];
/* If we're doing ranges, random or incremental, then this
* defines the min/max for those ranges.
*/
__u32 saddr_min; /* inclusive, source IP address */
__u32 saddr_max; /* exclusive, source IP address */
__u32 daddr_min; /* inclusive, dest IP address */
__u32 daddr_max; /* exclusive, dest IP address */
__u16 udp_src_min; /* inclusive, source UDP port */
__u16 udp_src_max; /* exclusive, source UDP port */
__u16 udp_dst_min; /* inclusive, dest UDP port */
__u16 udp_dst_max; /* exclusive, dest UDP port */
__u32 src_mac_count; /* How many MACs to iterate through */
__u32 dst_mac_count; /* How many MACs to iterate through */
unsigned char dst_mac[6];
unsigned char src_mac[6];
__u32 cur_dst_mac_offset;
__u32 cur_src_mac_offset;
__u32 cur_saddr;
__u32 cur_daddr;
__u16 cur_udp_dst;
__u16 cur_udp_src;
__u8 hh[14];
/* = {
0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
We fill in SRC address later
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x08, 0x00
};
*/
__u16 pad; /* pad out the hh struct to an even 16 bytes */
char result[512];
/* proc file names */
char fname[80];
char busy_fname[80];
struct proc_dir_entry *proc_ent;
struct proc_dir_entry *busy_proc_ent;
};
struct pktgen_hdr {
__u32 pgh_magic;
__u32 seq_num;
__u32 tv_sec;
__u32 tv_usec;
};
static int cpu_speed;
static int debug;
/* Module parameters, defaults. */
static int count_d = 100000;
static int ipg_d;
static int clone_skb_d;
#define MAX_PKTGEN 8
static struct pktgen_info pginfos[MAX_PKTGEN];
/** Convert to miliseconds */
static inline __u64 tv_to_ms(const struct timeval* tv) {
__u64 ms = tv->tv_usec / 1000;
ms += (__u64)tv->tv_sec * (__u64)1000;
return ms;
}
static inline __u64 getCurMs(void) {
struct timeval tv;
do_gettimeofday(&tv);
return tv_to_ms(&tv);
}
#define PG_PROC_DIR "pktgen"
static struct proc_dir_entry *proc_dir;
static struct net_device *setup_inject(struct pktgen_info* info)
{
struct net_device *odev;
odev = dev_get_by_name(info->outdev);
if (!odev) {
sprintf(info->result, "No such netdevice: \"%s\"", info->outdev);
goto out;
}
if (odev->type != ARPHRD_ETHER) {
sprintf(info->result, "Not ethernet device: \"%s\"", info->outdev);
goto out_put;
}
if (!netif_running(odev)) {
sprintf(info->result, "Device is down: \"%s\"", info->outdev);
goto out_put;
}
/* Default to the interface's mac if not explicitly set. */
if (!(info->flags & F_SET_SRCMAC)) {
memcpy(&(info->hh[6]), odev->dev_addr, 6);
}
else {
memcpy(&(info->hh[6]), info->src_mac, 6);
}
/* Set up Dest MAC */
memcpy(&(info->hh[0]), info->dst_mac, 6);
info->saddr_min = 0;
info->saddr_max = 0;
if (strlen(info->src_min) == 0) {
struct in_device *in_dev = in_dev_get(odev);
if (in_dev) {
if (in_dev->ifa_list) {
info->saddr_min = in_dev->ifa_list->ifa_address;
info->saddr_max = info->saddr_min;
}
in_dev_put(in_dev);
}
}
else {
info->saddr_min = in_aton(info->src_min);
info->saddr_max = in_aton(info->src_max);
}
info->daddr_min = in_aton(info->dst_min);
info->daddr_max = in_aton(info->dst_max);
/* Initialize current values. */
info->cur_dst_mac_offset = 0;
info->cur_src_mac_offset = 0;
info->cur_saddr = info->saddr_min;
info->cur_daddr = info->daddr_min;
info->cur_udp_dst = info->udp_dst_min;
info->cur_udp_src = info->udp_src_min;
return odev;
out_put:
dev_put(odev);
out:
return NULL;
}
static void nanospin(int ipg, struct pktgen_info* info)
{
u32 idle_start, idle;
idle_start = cycles();
for (;;) {
barrier();
idle = cycles() - idle_start;
if (idle * 1000 >= ipg * cpu_speed)
break;
}
info->idle_acc += idle;
}
static int calc_mhz(void)
{
struct timeval start, stop;
u32 start_s, elapsed;
do_gettimeofday(&start);
start_s = cycles();
do {
barrier();
elapsed = cycles() - start_s;
if (elapsed == 0)
return 0;
} while (elapsed < 1000 * 50000);
do_gettimeofday(&stop);
return elapsed/(stop.tv_usec-start.tv_usec+1000000*(stop.tv_sec-start.tv_sec));
}
static void cycles_calibrate(void)
{
int i;
for (i = 0; i < 3; i++) {
int res = calc_mhz();
if (res > cpu_speed)
cpu_speed = res;
}
}
/* Increment/randomize headers according to flags and current values
* for IP src/dest, UDP src/dst port, MAC-Addr src/dst
*/
static void mod_cur_headers(struct pktgen_info* info) {
__u32 imn;
__u32 imx;
/* Deal with source MAC */
if (info->src_mac_count > 1) {
__u32 mc;
__u32 tmp;
if (info->flags & F_MACSRC_RND) {
mc = net_random() % (info->src_mac_count);
}
else {
mc = info->cur_src_mac_offset++;
if (info->cur_src_mac_offset > info->src_mac_count) {
info->cur_src_mac_offset = 0;
}
}
tmp = info->src_mac[5] + (mc & 0xFF);
info->hh[11] = tmp;
tmp = (info->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
info->hh[10] = tmp;
tmp = (info->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
info->hh[9] = tmp;
tmp = (info->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
info->hh[8] = tmp;
tmp = (info->src_mac[1] + (tmp >> 8));
info->hh[7] = tmp;
}
/* Deal with Destination MAC */
if (info->dst_mac_count > 1) {
__u32 mc;
__u32 tmp;
if (info->flags & F_MACDST_RND) {
mc = net_random() % (info->dst_mac_count);
}
else {
mc = info->cur_dst_mac_offset++;
if (info->cur_dst_mac_offset > info->dst_mac_count) {
info->cur_dst_mac_offset = 0;
}
}
tmp = info->dst_mac[5] + (mc & 0xFF);
info->hh[5] = tmp;
tmp = (info->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
info->hh[4] = tmp;
tmp = (info->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
info->hh[3] = tmp;
tmp = (info->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
info->hh[2] = tmp;
tmp = (info->dst_mac[1] + (tmp >> 8));
info->hh[1] = tmp;
}
if (info->udp_src_min < info->udp_src_max) {
if (info->flags & F_UDPSRC_RND) {
info->cur_udp_src = ((net_random() % (info->udp_src_max - info->udp_src_min))
+ info->udp_src_min);
}
else {
info->cur_udp_src++;
if (info->cur_udp_src >= info->udp_src_max) {
info->cur_udp_src = info->udp_src_min;
}
}
}
if (info->udp_dst_min < info->udp_dst_max) {
if (info->flags & F_UDPDST_RND) {
info->cur_udp_dst = ((net_random() % (info->udp_dst_max - info->udp_dst_min))
+ info->udp_dst_min);
}
else {
info->cur_udp_dst++;
if (info->cur_udp_dst >= info->udp_dst_max) {
info->cur_udp_dst = info->udp_dst_min;
}
}
}
if ((imn = ntohl(info->saddr_min)) < (imx = ntohl(info->saddr_max))) {
__u32 t;
if (info->flags & F_IPSRC_RND) {
t = ((net_random() % (imx - imn)) + imn);
}
else {
t = ntohl(info->cur_saddr);
t++;
if (t >= imx) {
t = imn;
}
}
info->cur_saddr = htonl(t);
}
if ((imn = ntohl(info->daddr_min)) < (imx = ntohl(info->daddr_max))) {
__u32 t;
if (info->flags & F_IPDST_RND) {
t = ((net_random() % (imx - imn)) + imn);
}
else {
t = ntohl(info->cur_daddr);
t++;
if (t >= imx) {
t = imn;
}
}
info->cur_daddr = htonl(t);
}
}/* mod_cur_headers */
static struct sk_buff *fill_packet(struct net_device *odev, struct pktgen_info* info)
{
struct sk_buff *skb = NULL;
__u8 *eth;
struct udphdr *udph;
int datalen, iplen;
struct iphdr *iph;
struct pktgen_hdr *pgh = NULL;
skb = alloc_skb(info->pkt_size + 64 + 16, GFP_ATOMIC);
if (!skb) {
sprintf(info->result, "No memory");
return NULL;
}
skb_reserve(skb, 16);
/* Reserve for ethernet and IP header */
eth = (__u8 *) skb_push(skb, 14);
iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr));
udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
/* Update any of the values, used when we're incrementing various
* fields.
*/
mod_cur_headers(info);
memcpy(eth, info->hh, 14);
datalen = info->pkt_size - 14 - 20 - 8; /* Eth + IPh + UDPh */
if (datalen < sizeof(struct pktgen_hdr)) {
datalen = sizeof(struct pktgen_hdr);
}
udph->source = htons(info->cur_udp_src);
udph->dest = htons(info->cur_udp_dst);
udph->len = htons(datalen + 8); /* DATA + udphdr */
udph->check = 0; /* No checksum */
iph->ihl = 5;
iph->version = 4;
iph->ttl = 3;
iph->tos = 0;
iph->protocol = IPPROTO_UDP; /* UDP */
iph->saddr = info->cur_saddr;
iph->daddr = info->cur_daddr;
iph->frag_off = 0;
iplen = 20 + 8 + datalen;
iph->tot_len = htons(iplen);
iph->check = 0;
iph->check = ip_fast_csum((void *) iph, iph->ihl);
skb->protocol = __constant_htons(ETH_P_IP);
skb->mac.raw = ((u8 *)iph) - 14;
skb->dev = odev;
skb->pkt_type = PACKET_HOST;
if (info->nfrags <= 0) {
pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
} else {
int frags = info->nfrags;
int i;
/* TODO: Verify this is OK...it sure is ugly. --Ben */
pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8);
if (frags > MAX_SKB_FRAGS)
frags = MAX_SKB_FRAGS;
if (datalen > frags*PAGE_SIZE) {
skb_put(skb, datalen-frags*PAGE_SIZE);
datalen = frags*PAGE_SIZE;
}
i = 0;
while (datalen > 0) {
struct page *page = alloc_pages(GFP_KERNEL, 0);
skb_shinfo(skb)->frags[i].page = page;
skb_shinfo(skb)->frags[i].page_offset = 0;
skb_shinfo(skb)->frags[i].size =
(datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
datalen -= skb_shinfo(skb)->frags[i].size;
skb->len += skb_shinfo(skb)->frags[i].size;
skb->data_len += skb_shinfo(skb)->frags[i].size;
i++;
skb_shinfo(skb)->nr_frags = i;
}
while (i < frags) {
int rem;
if (i == 0)
break;
rem = skb_shinfo(skb)->frags[i - 1].size / 2;
if (rem == 0)
break;
skb_shinfo(skb)->frags[i - 1].size -= rem;
skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1];
get_page(skb_shinfo(skb)->frags[i].page);
skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page;
skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size;
skb_shinfo(skb)->frags[i].size = rem;
i++;
skb_shinfo(skb)->nr_frags = i;
}
}
/* Stamp the time, and sequence number, convert them to network byte order */
if (pgh) {
struct timeval timestamp;
pgh->pgh_magic = htonl(PKTGEN_MAGIC);
pgh->seq_num = htonl(info->seq_num);
do_gettimeofday(×tamp);
pgh->tv_sec = htonl(timestamp.tv_sec);
pgh->tv_usec = htonl(timestamp.tv_usec);
}
return skb;
}
static void inject(struct pktgen_info* info)
{
struct net_device *odev = NULL;
struct sk_buff *skb = NULL;
__u64 total = 0;
__u64 idle = 0;
__u64 lcount = 0;
int nr_frags = 0;
int last_ok = 1; /* Was last skb sent?
* Or a failed transmit of some sort? This will keep
* sequence numbers in order, for example.
*/
__u64 fp = 0;
__u32 fp_tmp = 0;
odev = setup_inject(info);
if (!odev)
return;
info->do_run_run = 1; /* Cranke yeself! */
info->idle_acc = 0;
info->sofar = 0;
lcount = info->count;
/* Build our initial pkt and place it as a re-try pkt. */
skb = fill_packet(odev, info);
if (skb == NULL) goto out_reldev;
do_gettimeofday(&(info->started_at));
while(info->do_run_run) {
/* Set a time-stamp, so build a new pkt each time */
if (last_ok) {
if (++fp_tmp >= info->clone_skb ) {
kfree_skb(skb);
skb = fill_packet(odev, info);
if (skb == NULL) {
goto out_reldev;
}
fp++;
fp_tmp = 0; /* reset counter */
}
}
nr_frags = skb_shinfo(skb)->nr_frags;
spin_lock_bh(&odev->xmit_lock);
if (!netif_queue_stopped(odev)) {
atomic_inc(&skb->users);
if (odev->hard_start_xmit(skb, odev)) {
atomic_dec(&skb->users);
if (net_ratelimit()) {
printk(KERN_INFO "Hard xmit error\n");
}
info->errors++;
last_ok = 0;
}
else {
last_ok = 1;
info->sofar++;
info->seq_num++;
}
}
else {
/* Re-try it next time */
last_ok = 0;
}
spin_unlock_bh(&odev->xmit_lock);
if (info->ipg) {
/* Try not to busy-spin if we have larger sleep times.
* TODO: Investigate better ways to do this.
*/
if (info->ipg < 10000) { /* 10 usecs or less */
nanospin(info->ipg, info);
}
else if (info->ipg < 10000000) { /* 10ms or less */
udelay(info->ipg / 1000);
}
else {
mdelay(info->ipg / 1000000);
}
}
if (signal_pending(current)) {
break;
}
/* If lcount is zero, then run forever */
if ((lcount != 0) && (--lcount == 0)) {
if (atomic_read(&skb->users) != 1) {
u32 idle_start, idle;
idle_start = cycles();
while (atomic_read(&skb->users) != 1) {
if (signal_pending(current)) {
break;
}
schedule();
}
idle = cycles() - idle_start;
info->idle_acc += idle;
}
break;
}
if (netif_queue_stopped(odev) || need_resched()) {
u32 idle_start, idle;
idle_start = cycles();
do {
if (signal_pending(current)) {
info->do_run_run = 0;
break;
}
if (!netif_running(odev)) {
info->do_run_run = 0;
break;
}
if (need_resched())
schedule();
else
do_softirq();
} while (netif_queue_stopped(odev));
idle = cycles() - idle_start;
info->idle_acc += idle;
}
}/* while we should be running */
do_gettimeofday(&(info->stopped_at));
total = (info->stopped_at.tv_sec - info->started_at.tv_sec) * 1000000 +
info->stopped_at.tv_usec - info->started_at.tv_usec;
idle = (__u32)(info->idle_acc)/(__u32)(cpu_speed);
{
char *p = info->result;
__u64 bps, pps = 0;
if (total > 1000)
pps = (__u32)(info->sofar * 1000) / ((__u32)(total) / 1000);
else if(total > 100)
pps = (__u32)(info->sofar * 10000) / ((__u32)(total) / 100);
else if(total > 10)
pps = (__u32)(info->sofar * 100000) / ((__u32)(total) / 10);
else if(total > 1)
pps = (__u32)(info->sofar * 1000000) / (__u32)total;
bps = pps * 8 * (info->pkt_size + 4); /* take 32bit ethernet CRC into account */
p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags) %llupps %lluMb/sec (%llubps) errors: %llu",
(unsigned long long) total,
(unsigned long long) (total - idle),
(unsigned long long) idle,
(unsigned long long) info->sofar,
skb->len + 4, /* Add 4 to account for the ethernet checksum */
nr_frags,
(unsigned long long) pps,
(unsigned long long) (bps / (u64) 1024 / (u64) 1024),
(unsigned long long) bps,
(unsigned long long) info->errors
);
}
kfree_skb(skb);
out_reldev:
if (odev) {
dev_put(odev);
odev = NULL;
}
return;
}
/* proc/net/pktgen/pg */
static int proc_busy_read(char *buf , char **start, off_t offset,
int len, int *eof, void *data)
{
char *p;
int idx = (int)(long)(data);
struct pktgen_info* info = NULL;
if ((idx < 0) || (idx >= MAX_PKTGEN)) {
printk("ERROR: idx: %i is out of range in proc_write\n", idx);
return -EINVAL;
}
info = &(pginfos[idx]);
p = buf;
p += sprintf(p, "%d\n", info->busy);
*eof = 1;
return p-buf;
}
static int proc_read(char *buf , char **start, off_t offset,
int len, int *eof, void *data)
{
char *p;
int i;
int idx = (int)(long)(data);
struct pktgen_info* info = NULL;
__u64 sa;
__u64 stopped;
__u64 now = getCurMs();
if ((idx < 0) || (idx >= MAX_PKTGEN)) {
printk("ERROR: idx: %i is out of range in proc_write\n", idx);
return -EINVAL;
}
info = &(pginfos[idx]);
p = buf;
p += sprintf(p, "%s\n", VERSION); /* Help with parsing compatibility */
p += sprintf(p, "Params: count %llu pkt_size: %u frags: %d ipg: %u clone_skb: %d odev \"%s\"\n",
(unsigned long long) info->count,
info->pkt_size, info->nfrags, info->ipg,
info->clone_skb, info->outdev);
p += sprintf(p, " dst_min: %s dst_max: %s src_min: %s src_max: %s\n",
info->dst_min, info->dst_max, info->src_min, info->src_max);
p += sprintf(p, " src_mac: ");
for (i = 0; i < 6; i++) {
p += sprintf(p, "%02X%s", info->src_mac[i], i == 5 ? " " : ":");
}
p += sprintf(p, "dst_mac: ");
for (i = 0; i < 6; i++) {
p += sprintf(p, "%02X%s", info->dst_mac[i], i == 5 ? "\n" : ":");
}
p += sprintf(p, " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
info->udp_src_min, info->udp_src_max, info->udp_dst_min,
info->udp_dst_max);
p += sprintf(p, " src_mac_count: %d dst_mac_count: %d\n Flags: ",
info->src_mac_count, info->dst_mac_count);
if (info->flags & F_IPSRC_RND) {
p += sprintf(p, "IPSRC_RND ");
}
if (info->flags & F_IPDST_RND) {
p += sprintf(p, "IPDST_RND ");
}
if (info->flags & F_UDPSRC_RND) {
p += sprintf(p, "UDPSRC_RND ");
}
if (info->flags & F_UDPDST_RND) {
p += sprintf(p, "UDPDST_RND ");
}
if (info->flags & F_MACSRC_RND) {
p += sprintf(p, "MACSRC_RND ");
}
if (info->flags & F_MACDST_RND) {
p += sprintf(p, "MACDST_RND ");
}
p += sprintf(p, "\n");
sa = tv_to_ms(&(info->started_at));
stopped = tv_to_ms(&(info->stopped_at));
if (info->do_run_run) {
stopped = now; /* not really stopped, more like last-running-at */
}
p += sprintf(p, "Current:\n pkts-sofar: %llu errors: %llu\n started: %llums stopped: %llums now: %llums idle: %lluns\n",
(unsigned long long) info->sofar,
(unsigned long long) info->errors,
(unsigned long long) sa,
(unsigned long long) stopped,
(unsigned long long) now,
(unsigned long long) info->idle_acc);
p += sprintf(p, " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
info->seq_num, info->cur_dst_mac_offset, info->cur_src_mac_offset);
p += sprintf(p, " cur_saddr: 0x%x cur_daddr: 0x%x cur_udp_dst: %d cur_udp_src: %d\n",
info->cur_saddr, info->cur_daddr, info->cur_udp_dst, info->cur_udp_src);
if (info->result[0])
p += sprintf(p, "Result: %s\n", info->result);
else
p += sprintf(p, "Result: Idle\n");
*eof = 1;
return p - buf;
}
static int count_trail_chars(const char __user *user_buffer, unsigned int maxlen)
{
int i;
for (i = 0; i < maxlen; i++) {
char c;
if (get_user(c, &user_buffer[i]))
return -EFAULT;
switch (c) {
case '\"':
case '\n':
case '\r':
case '\t':
case ' ':
case '=':
break;
default:
goto done;
};
}
done:
return i;
}
static unsigned long num_arg(const char __user *user_buffer, unsigned long maxlen,
unsigned long *num)
{
int i = 0;
*num = 0;
for(; i < maxlen; i++) {
char c;
if (get_user(c, &user_buffer[i]))
return -EFAULT;
if ((c >= '0') && (c <= '9')) {
*num *= 10;
*num += c -'0';
} else
break;
}
return i;
}
static int strn_len(const char __user *user_buffer, unsigned int maxlen)
{
int i = 0;
for(; i < maxlen; i++) {
char c;
if (get_user(c, &user_buffer[i]))
return -EFAULT;
switch (c) {
case '\"':
case '\n':
case '\r':
case '\t':
case ' ':
goto done_str;
default:
break;
};
}
done_str:
return i;
}
static int proc_write(struct file *file, const char __user *user_buffer,
unsigned long count, void *data)
{
int i = 0, max, len;
char name[16], valstr[32];
unsigned long value = 0;
int idx = (int)(long)(data);
struct pktgen_info* info = NULL;
char* result = NULL;
int tmp;
if ((idx < 0) || (idx >= MAX_PKTGEN)) {
printk("ERROR: idx: %i is out of range in proc_write\n", idx);
return -EINVAL;
}
info = &(pginfos[idx]);
result = &(info->result[0]);
if (count < 1) {
sprintf(result, "Wrong command format");
return -EINVAL;
}
max = count - i;
tmp = count_trail_chars(&user_buffer[i], max);
if (tmp < 0)
return tmp;
i += tmp;
/* Read variable name */
len = strn_len(&user_buffer[i], sizeof(name) - 1);
if (len < 0)
return len;
memset(name, 0, sizeof(name));
if (copy_from_user(name, &user_buffer[i], len))
return -EFAULT;
i += len;
max = count -i;
len = count_trail_chars(&user_buffer[i], max);
if (len < 0)
return len;
i += len;
if (debug)
printk("pg: %s,%lu\n", name, count);
if (!strcmp(name, "stop")) {
if (info->do_run_run) {
strcpy(result, "Stopping");
}
else {
strcpy(result, "Already stopped...\n");
}
info->do_run_run = 0;
return count;
}
if (!strcmp(name, "pkt_size")) {
len = num_arg(&user_buffer[i], 10, &value);
if (len < 0)
return len;
i += len;
if (value < 14+20+8)
value = 14+20+8;
info->pkt_size = value;
sprintf(result, "OK: pkt_size=%u", info->pkt_size);
return count;
}
if (!strcmp(name, "frags")) {
len = num_arg(&user_buffer[i], 10, &value);
if (len < 0)
return len;
i += len;
info->nfrags = value;
sprintf(result, "OK: frags=%u", info->nfrags);
return count;
}
if (!strcmp(name, "ipg")) {
len = num_arg(&user_buffer[i], 10, &value);
if (len < 0)
return len;
i += len;
info->ipg = value;
sprintf(result, "OK: ipg=%u", info->ipg);
return count;
}
if (!strcmp(name, "udp_src_min")) {
len = num_arg(&user_buffer[i], 10, &value);
if (len < 0)
return len;
i += len;
info->udp_src_min = value;
sprintf(result, "OK: udp_src_min=%u", info->udp_src_min);
return count;
}
if (!strcmp(name, "udp_dst_min")) {
len = num_arg(&user_buffer[i], 10, &value);
if (len < 0)
return len;
i += len;
info->udp_dst_min = value;
sprintf(result, "OK: udp_dst_min=%u", info->udp_dst_min);
return count;
}
if (!strcmp(name, "udp_src_max")) {
len = num_arg(&user_buffer[i], 10, &value);
if (len < 0)
return len;
i += len;
info->udp_src_max = value;
sprintf(result, "OK: udp_src_max=%u", info->udp_src_max);
return count;
}
if (!strcmp(name, "udp_dst_max")) {
len = num_arg(&user_buffer[i], 10, &value);
if (len < 0)
return len;
i += len;
info->udp_dst_max = value;
sprintf(result, "OK: udp_dst_max=%u", info->udp_dst_max);
return count;
}
if (!strcmp(name, "clone_skb")) {
len = num_arg(&user_buffer[i], 10, &value);
if (len < 0)
return len;
i += len;
info->clone_skb = value;
sprintf(result, "OK: clone_skb=%d", info->clone_skb);
return count;
}
if (!strcmp(name, "count")) {
len = num_arg(&user_buffer[i], 10, &value);
if (len < 0)
return len;
i += len;
info->count = value;
sprintf(result, "OK: count=%llu", (unsigned long long) info->count);
return count;
}
if (!strcmp(name, "src_mac_count")) {
len = num_arg(&user_buffer[i], 10, &value);
if (len < 0)
return len;
i += len;
info->src_mac_count = value;
sprintf(result, "OK: src_mac_count=%d", info->src_mac_count);
return count;
}
if (!strcmp(name, "dst_mac_count")) {
len = num_arg(&user_buffer[i], 10, &value);
if (len < 0)
return len;
i += len;
info->dst_mac_count = value;
sprintf(result, "OK: dst_mac_count=%d", info->dst_mac_count);
return count;
}
if (!strcmp(name, "odev")) {
len = strn_len(&user_buffer[i], sizeof(info->outdev) - 1);
if (len < 0)
return len;
memset(info->outdev, 0, sizeof(info->outdev));
if (copy_from_user(info->outdev, &user_buffer[i], len))
return -EFAULT;
i += len;
sprintf(result, "OK: odev=%s", info->outdev);
return count;
}
if (!strcmp(name, "flag")) {
char f[32];
len = strn_len(&user_buffer[i], sizeof(f) - 1);
if (len < 0)
return len;
memset(f, 0, 32);
if (copy_from_user(f, &user_buffer[i], len))
return -EFAULT;
i += len;
if (strcmp(f, "IPSRC_RND") == 0) {
info->flags |= F_IPSRC_RND;
}
else if (strcmp(f, "!IPSRC_RND") == 0) {
info->flags &= ~F_IPSRC_RND;
}
else if (strcmp(f, "IPDST_RND") == 0) {
info->flags |= F_IPDST_RND;
}
else if (strcmp(f, "!IPDST_RND") == 0) {
info->flags &= ~F_IPDST_RND;
}
else if (strcmp(f, "UDPSRC_RND") == 0) {
info->flags |= F_UDPSRC_RND;
}
else if (strcmp(f, "!UDPSRC_RND") == 0) {
info->flags &= ~F_UDPSRC_RND;
}
else if (strcmp(f, "UDPDST_RND") == 0) {
info->flags |= F_UDPDST_RND;
}
else if (strcmp(f, "!UDPDST_RND") == 0) {
info->flags &= ~F_UDPDST_RND;
}
else if (strcmp(f, "MACSRC_RND") == 0) {
info->flags |= F_MACSRC_RND;
}
else if (strcmp(f, "!MACSRC_RND") == 0) {
info->flags &= ~F_MACSRC_RND;
}
else if (strcmp(f, "MACDST_RND") == 0) {
info->flags |= F_MACDST_RND;
}
else if (strcmp(f, "!MACDST_RND") == 0) {
info->flags &= ~F_MACDST_RND;
}
else {
sprintf(result, "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
f,
"IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND\n");
return count;
}
sprintf(result, "OK: flags=0x%x", info->flags);
return count;
}
if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
len = strn_len(&user_buffer[i], sizeof(info->dst_min) - 1);
if (len < 0)
return len;
memset(info->dst_min, 0, sizeof(info->dst_min));
if (copy_from_user(info->dst_min, &user_buffer[i], len))
return -EFAULT;
if(debug)
printk("pg: dst_min set to: %s\n", info->dst_min);
i += len;
sprintf(result, "OK: dst_min=%s", info->dst_min);
return count;
}
if (!strcmp(name, "dst_max")) {
len = strn_len(&user_buffer[i], sizeof(info->dst_max) - 1);
if (len < 0)
return len;
memset(info->dst_max, 0, sizeof(info->dst_max));
if (copy_from_user(info->dst_max, &user_buffer[i], len))
return -EFAULT;
if(debug)
printk("pg: dst_max set to: %s\n", info->dst_max);
i += len;
sprintf(result, "OK: dst_max=%s", info->dst_max);
return count;
}
if (!strcmp(name, "src_min")) {
len = strn_len(&user_buffer[i], sizeof(info->src_min) - 1);
if (len < 0)
return len;
memset(info->src_min, 0, sizeof(info->src_min));
if (copy_from_user(info->src_min, &user_buffer[i], len))
return -EFAULT;
if(debug)
printk("pg: src_min set to: %s\n", info->src_min);
i += len;
sprintf(result, "OK: src_min=%s", info->src_min);
return count;
}
if (!strcmp(name, "src_max")) {
len = strn_len(&user_buffer[i], sizeof(info->src_max) - 1);
if (len < 0)
return len;
memset(info->src_max, 0, sizeof(info->src_max));
if (copy_from_user(info->src_max, &user_buffer[i], len))
return -EFAULT;
if(debug)
printk("pg: src_max set to: %s\n", info->src_max);
i += len;
sprintf(result, "OK: src_max=%s", info->src_max);
return count;
}
if (!strcmp(name, "dstmac")) {
char *v = valstr;
unsigned char *m = info->dst_mac;
len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
if (len < 0)
return len;
memset(valstr, 0, sizeof(valstr));
if (copy_from_user(valstr, &user_buffer[i], len))
return -EFAULT;
i += len;
for(*m = 0;*v && m < info->dst_mac + 6; v++) {
if (*v >= '0' && *v <= '9') {
*m *= 16;
*m += *v - '0';
}
if (*v >= 'A' && *v <= 'F') {
*m *= 16;
*m += *v - 'A' + 10;
}
if (*v >= 'a' && *v <= 'f') {
*m *= 16;
*m += *v - 'a' + 10;
}
if (*v == ':') {
m++;
*m = 0;
}
}
sprintf(result, "OK: dstmac");
return count;
}
if (!strcmp(name, "srcmac")) {
char *v = valstr;
unsigned char *m = info->src_mac;
len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
if (len < 0)
return len;
memset(valstr, 0, sizeof(valstr));
if (copy_from_user(valstr, &user_buffer[i], len))
return -EFAULT;
i += len;
for(*m = 0;*v && m < info->src_mac + 6; v++) {
if (*v >= '0' && *v <= '9') {
*m *= 16;
*m += *v - '0';
}
if (*v >= 'A' && *v <= 'F') {
*m *= 16;
*m += *v - 'A' + 10;
}
if (*v >= 'a' && *v <= 'f') {
*m *= 16;
*m += *v - 'a' + 10;
}
if (*v == ':') {
m++;
*m = 0;
}
}
sprintf(result, "OK: srcmac");
return count;
}
if (!strcmp(name, "inject") || !strcmp(name, "start")) {
if (info->busy) {
strcpy(info->result, "Already running...\n");
}
else {
info->busy = 1;
strcpy(info->result, "Starting");
inject(info);
info->busy = 0;
}
return count;
}
sprintf(info->result, "No such parameter \"%s\"", name);
return -EINVAL;
}
static int create_proc_dir(void)
{
int len;
/* does proc_dir already exists */
len = strlen(PG_PROC_DIR);
for (proc_dir = proc_net->subdir; proc_dir;
proc_dir=proc_dir->next) {
if ((proc_dir->namelen == len) &&
(! memcmp(proc_dir->name, PG_PROC_DIR, len)))
break;
}
if (!proc_dir)
proc_dir = create_proc_entry(PG_PROC_DIR, S_IFDIR, proc_net);
if (!proc_dir) return -ENODEV;
return 1;
}
static int remove_proc_dir(void)
{
remove_proc_entry(PG_PROC_DIR, proc_net);
return 1;
}
static int __init init(void)
{
int i;
printk(version);
cycles_calibrate();
if (cpu_speed == 0) {
printk("pktgen: Error: your machine does not have working cycle counter.\n");
return -EINVAL;
}
create_proc_dir();
for (i = 0; i<MAX_PKTGEN; i++) {
memset(&(pginfos[i]), 0, sizeof(pginfos[i]));
pginfos[i].pkt_size = ETH_ZLEN;
pginfos[i].nfrags = 0;
pginfos[i].clone_skb = clone_skb_d;
pginfos[i].ipg = ipg_d;
pginfos[i].count = count_d;
pginfos[i].sofar = 0;
pginfos[i].hh[12] = 0x08; /* fill in protocol. Rest is filled in later. */
pginfos[i].hh[13] = 0x00;
pginfos[i].udp_src_min = 9; /* sink NULL */
pginfos[i].udp_src_max = 9;
pginfos[i].udp_dst_min = 9;
pginfos[i].udp_dst_max = 9;
sprintf(pginfos[i].fname, "net/%s/pg%i", PG_PROC_DIR, i);
pginfos[i].proc_ent = create_proc_entry(pginfos[i].fname, 0600, 0);
if (!pginfos[i].proc_ent) {
printk("pktgen: Error: cannot create net/%s/pg procfs entry.\n", PG_PROC_DIR);
goto cleanup_mem;
}
pginfos[i].proc_ent->read_proc = proc_read;
pginfos[i].proc_ent->write_proc = proc_write;
pginfos[i].proc_ent->data = (void*)(long)(i);
pginfos[i].proc_ent->owner = THIS_MODULE;
sprintf(pginfos[i].busy_fname, "net/%s/pg_busy%i", PG_PROC_DIR, i);
pginfos[i].busy_proc_ent = create_proc_entry(pginfos[i].busy_fname, 0, 0);
if (!pginfos[i].busy_proc_ent) {
printk("pktgen: Error: cannot create net/%s/pg_busy procfs entry.\n", PG_PROC_DIR);
goto cleanup_mem;
}
pginfos[i].busy_proc_ent->read_proc = proc_busy_read;
pginfos[i].busy_proc_ent->data = (void*)(long)(i);
}
return 0;
cleanup_mem:
for (i = 0; i<MAX_PKTGEN; i++) {
if (strlen(pginfos[i].fname)) {
remove_proc_entry(pginfos[i].fname, NULL);
}
if (strlen(pginfos[i].busy_fname)) {
remove_proc_entry(pginfos[i].busy_fname, NULL);
}
}
return -ENOMEM;
}
static void __exit cleanup(void)
{
int i;
for (i = 0; i<MAX_PKTGEN; i++) {
if (strlen(pginfos[i].fname)) {
remove_proc_entry(pginfos[i].fname, NULL);
}
if (strlen(pginfos[i].busy_fname)) {
remove_proc_entry(pginfos[i].busy_fname, NULL);
}
}
remove_proc_dir();
}
module_init(init);
module_exit(cleanup);
MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
MODULE_DESCRIPTION("Packet Generator tool");
MODULE_LICENSE("GPL");
MODULE_PARM(count_d, "i");
MODULE_PARM(ipg_d, "i");
MODULE_PARM(cpu_speed, "i");
MODULE_PARM(clone_skb_d, "i");
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