lkml.org 
[lkml]   [2002]   [Oct]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATCH 2.5.44] Pktgen for 2.5.44
From
Date
Hello...

I have ported (integrated sounds better i think...) pktgen from
2.4.20-rc1 to 2.5.44...

I only need to change current->need_resched to need_resched() in the
source... works fine for me....

I also correct the documentation changing multiskb to clone_skb


best regards
--
::: Lucio F. Maciel
::: abslucio@terra.com.br
::: icq 93065464
::: Absoluta.net
diff -Naur -X /root/dontdiff linux-2.5.44-ori/Documentation/networking/pktgen.txt linux-2.5.44/Documentation/networking/pktgen.txt
--- linux-2.5.44-ori/Documentation/networking/pktgen.txt 1969-12-31 21:00:00.000000000 -0300
+++ linux-2.5.44/Documentation/networking/pktgen.txt 2002-10-29 15:28:51.000000000 -0300
@@ -0,0 +1,77 @@
+How to use the Linux packet generator module.
+
+1. Enable CONFIG_NET_PKTGEN to compile and build pktgen.o, install it
+ in the place where insmod may find it.
+2. Cut script "ipg" (see below).
+3. Edit script to set preferred device and destination IP address.
+3a. Create more scripts for different interfaces. Up to thirty-two
+ pktgen processes can be configured and run at once by using the
+ 32 /proc/net/pktgen/pg* files.
+4. Run in shell: ". ipg"
+5. After this two commands are defined:
+ A. "pg" to start generator and to get results.
+ B. "pgset" to change generator parameters. F.e.
+ pgset "clone_skb 100" sets the number of coppies of the same packet
+ will be sent before a new packet is allocated
+ pgset "clone_skb 0" use multiple SKBs for packet generation
+ pgset "pkt_size 9014" sets packet size to 9014
+ pgset "frags 5" packet will consist of 5 fragments
+ pgset "count 200000" sets number of packets to send, set to zero
+ for continious sends untill explicitly
+ stopped.
+ pgset "ipg 5000" sets artificial gap inserted between packets
+ to 5000 nanoseconds
+ pgset "dst 10.0.0.1" sets IP destination address
+ (BEWARE! This generator is very aggressive!)
+ pgset "dst_min 10.0.0.1" Same as dst
+ pgset "dst_max 10.0.0.254" Set the maximum destination IP.
+ pgset "src_min 10.0.0.1" Set the minimum (or only) source IP.
+ pgset "src_max 10.0.0.254" Set the maximum source IP.
+ pgset "dstmac 00:00:00:00:00:00" sets MAC destination address
+ pgset "srcmac 00:00:00:00:00:00" sets MAC source address
+ pgset "src_mac_count 1" Sets the number of MACs we'll range through. The
+ 'minimum' MAC is what you set with srcmac.
+ pgset "dst_mac_count 1" Sets the number of MACs we'll range through. The
+ 'minimum' MAC is what you set with dstmac.
+ pgset "flag [name]" Set a flag to determine behaviour. Current flags
+ are: IPSRC_RND #IP Source is random (between min/max),
+ IPDST_RND, UDPSRC_RND,
+ UDPDST_RND, MACSRC_RND, MACDST_RND
+ pgset "udp_src_min 9" set UDP source port min, If < udp_src_max, then
+ cycle through the port range.
+ pgset "udp_src_max 9" set UDP source port max.
+ pgset "udp_dst_min 9" set UDP destination port min, If < udp_dst_max, then
+ cycle through the port range.
+ pgset "udp_dst_max 9" set UDP destination port max.
+ pgset stop aborts injection
+
+ Also, ^C aborts generator.
+
+---- cut here
+
+#! /bin/sh
+
+modprobe pktgen
+
+PGDEV=/proc/net/pktgen/pg0
+
+function pgset() {
+ local result
+
+ echo $1 > $PGDEV
+
+ result=`cat $PGDEV | fgrep "Result: OK:"`
+ if [ "$result" = "" ]; then
+ cat $PGDEV | fgrep Result:
+ fi
+}
+
+function pg() {
+ echo inject > $PGDEV
+ cat $PGDEV
+}
+
+pgset "odev eth0"
+pgset "dst 0.0.0.0"
+
+---- cut here
diff -Naur -X /root/dontdiff linux-2.5.44-ori/arch/i386/defconfig linux-2.5.44/arch/i386/defconfig
--- linux-2.5.44-ori/arch/i386/defconfig 2002-10-19 01:02:24.000000000 -0300
+++ linux-2.5.44/arch/i386/defconfig 2002-10-29 15:55:04.000000000 -0300
@@ -443,6 +443,11 @@
# CONFIG_NET_SCHED is not set

#
+# Network testing
+#
+# CONFIG_NET_PKTGEN is not set
+
+#
# Network device support
#
CONFIG_NETDEVICES=y
diff -Naur -X /root/dontdiff linux-2.5.44-ori/net/Config.help linux-2.5.44/net/Config.help
--- linux-2.5.44-ori/net/Config.help 2002-10-19 01:01:15.000000000 -0300
+++ linux-2.5.44/net/Config.help 2002-10-29 15:53:00.000000000 -0300
@@ -512,3 +512,18 @@
performance will be written to /proc/net/profile. If you don't know
what it is about, you don't need it: say N.

+CONFIG_NET_PKTGEN
+ This module will inject preconfigured packets, at a configurable
+ rate, out of a given interface. It is used for network interface
+ stress testing and performance analysis. If you don't understand
+ what was just said, you don't need it: say N.
+
+ Documentation on how to use the packet generator can be found
+ at <file:Documentation/networking/pktgen.txt>.
+
+ This code is also available as a module called pktgen.o ( = code
+ which can be inserted in and removed from the running kernel
+ whenever you want). If you want to compile it as a module, say M
+ here and read <file:Documentation/modules.txt>.
+
+
diff -Naur -X /root/dontdiff linux-2.5.44-ori/net/Config.in linux-2.5.44/net/Config.in
--- linux-2.5.44-ori/net/Config.in 2002-10-19 01:01:18.000000000 -0300
+++ linux-2.5.44/net/Config.in 2002-10-29 14:13:11.000000000 -0300
@@ -93,4 +93,10 @@
#bool 'Network code profiler' CONFIG_NET_PROFILE
endmenu

+mainmenu_option next_comment
+comment 'Network testing'
+tristate 'Packet Generator (USE WITH CAUTION)' CONFIG_NET_PKTGEN
+endmenu
+
+
endmenu
diff -Naur -X /root/dontdiff linux-2.5.44-ori/net/core/Makefile linux-2.5.44/net/core/Makefile
--- linux-2.5.44-ori/net/core/Makefile 2002-10-19 01:02:31.000000000 -0300
+++ linux-2.5.44/net/core/Makefile 2002-10-29 14:13:33.000000000 -0300
@@ -17,6 +17,7 @@
obj-$(CONFIG_NETFILTER) += netfilter.o
obj-$(CONFIG_NET_DIVERT) += dv.o
obj-$(CONFIG_NET_PROFILE) += profile.o
+obj-$(CONFIG_NET_PKTGEN) += pktgen.o
obj-$(CONFIG_NET_RADIO) += wireless.o
# Ugly. I wish all wireless drivers were moved in drivers/net/wireless
obj-$(CONFIG_NET_PCMCIA_RADIO) += wireless.o
diff -Naur -X /root/dontdiff linux-2.5.44-ori/net/core/pktgen.c linux-2.5.44/net/core/pktgen.c
--- linux-2.5.44-ori/net/core/pktgen.c 1969-12-31 21:00:00.000000000 -0300
+++ linux-2.5.44/net/core/pktgen.c 2002-10-29 15:50:23.000000000 -0300
@@ -0,0 +1,1388 @@
+/* -*-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
+ *
+ * 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 1.2"
+static char version[] __initdata =
+ "pktgen.c: v1.2: 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;
+ struct timeval timestamp;
+};
+
+static int cpu_speed;
+static int debug;
+
+/* Module parameters, defaults. */
+static int count_d = 100000;
+static int ipg_d = 0;
+static int clone_skb_d = 0;
+
+
+#define MAX_PKTGEN 8
+static struct pktgen_info pginfos[MAX_PKTGEN];
+
+
+/** Convert to miliseconds */
+inline __u64 tv_to_ms(const struct timeval* tv) {
+ __u64 ms = tv->tv_usec / 1000;
+ ms += (__u64)tv->tv_sec * (__u64)1000;
+ return ms;
+}
+
+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 = 0;
+
+static struct net_device *setup_inject(struct pktgen_info* info)
+{
+ struct net_device *odev;
+
+ rtnl_lock();
+ odev = __dev_get_by_name(info->outdev);
+ if (!odev) {
+ sprintf(info->result, "No such netdevice: \"%s\"", info->outdev);
+ goto out_unlock;
+ }
+
+ if (odev->type != ARPHRD_ETHER) {
+ sprintf(info->result, "Not ethernet device: \"%s\"", info->outdev);
+ goto out_unlock;
+ }
+
+ if (!netif_running(odev)) {
+ sprintf(info->result, "Device is down: \"%s\"", info->outdev);
+ goto out_unlock;
+ }
+
+ /* 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) {
+ if (odev->ip_ptr) {
+ struct in_device *in_dev = odev->ip_ptr;
+
+ if (in_dev->ifa_list) {
+ info->saddr_min = in_dev->ifa_list->ifa_address;
+ info->saddr_max = info->saddr_min;
+ }
+ }
+ }
+ 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;
+
+ atomic_inc(&odev->refcnt);
+ rtnl_unlock();
+
+ return odev;
+
+out_unlock:
+ rtnl_unlock();
+ 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) {
+ pgh->pgh_magic = htonl(PKTGEN_MAGIC);
+ do_gettimeofday(&(pgh->timestamp));
+ pgh->timestamp.tv_usec = htonl(pgh->timestamp.tv_usec);
+ pgh->timestamp.tv_sec = htonl(pgh->timestamp.tv_sec);
+ pgh->seq_num = htonl(info->seq_num);
+ }
+
+ 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) {
+ break;
+ }
+ fp++;
+ fp_tmp = 0; /* reset counter */
+ }
+ atomic_inc(&skb->users);
+ }
+
+ nr_frags = skb_shinfo(skb)->nr_frags;
+
+ spin_lock_bh(&odev->xmit_lock);
+ if (!netif_queue_stopped(odev)) {
+
+ if (odev->hard_start_xmit(skb, odev)) {
+ 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 pps = (__u32)(info->sofar * 1000) / ((__u32)(total) / 1000);
+ __u64 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
+ );
+ }
+
+out_reldev:
+ if (odev) {
+ dev_put(odev);
+ odev = NULL;
+ }
+
+ /* TODO: Is this worth printing out (other than for debug?) */
+ printk("fp = %llu\n", (unsigned long long) fp);
+ 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_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_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_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_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));
+ copy_from_user(name, &user_buffer[i], len);
+ 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));
+ copy_from_user(info->outdev, &user_buffer[i], len);
+ i += len;
+ sprintf(result, "OK: odev=%s", info->outdev);
+ return count;
+ }
+ if (!strcmp(name, "flag")) {
+ char f[32];
+ memset(f, 0, 32);
+ len = strn_len(&user_buffer[i], sizeof(f) - 1);
+ if (len < 0)
+ return len;
+ copy_from_user(f, &user_buffer[i], len);
+ 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));
+ copy_from_user(info->dst_min, &user_buffer[i], len);
+ 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));
+ copy_from_user(info->dst_max, &user_buffer[i], len);
+ 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));
+ copy_from_user(info->src_min, &user_buffer[i], len);
+ 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));
+ copy_from_user(info->src_max, &user_buffer[i], len);
+ 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));
+ copy_from_user(valstr, &user_buffer[i], len);
+ 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));
+ copy_from_user(valstr, &user_buffer[i], len);
+ 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")) {
+ MOD_INC_USE_COUNT;
+ if (info->busy) {
+ strcpy(info->result, "Already running...\n");
+ }
+ else {
+ info->busy = 1;
+ strcpy(info->result, "Starting");
+ inject(info);
+ info->busy = 0;
+ }
+ MOD_DEC_USE_COUNT;
+ return count;
+ }
+
+ sprintf(info->result, "No such parameter \"%s\"", name);
+ return -EINVAL;
+}
+
+
+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;
+}
+
+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);
+
+ 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");
\
 
 \ /
  Last update: 2005-03-22 13:30    [W:0.812 / U:0.028 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site