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[PKTGEN]: DSCP support 

Anyway, I've been asked to add support for managing DSCP codepoints,
so one can test DiffServ capable routers. It's very simple code and is
working for me.

Signed-off-by: Francesco Fondelli <francesco.fondelli@gmail.com>
Signed-off-by: Robert Olsson <robert.olsson@its.uu.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Francesco Fondelli 2006-09-27 16:32:03 -07:00 committed by David S. Miller
parent 34954ddc4f
commit 1ca7768c87
1 changed files with 59 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

65
net/core/pktgen.c
View File

@ -160,7 +160,7 @@
#include <asm/div64.h> /* do_div */
#include <asm/timex.h>
#define VERSION "pktgen v2.67: Packet Generator for packet performance testing.\n"
#define VERSION "pktgen v2.68: Packet Generator for packet performance testing.\n"
/* #define PG_DEBUG(a) a */
#define PG_DEBUG(a)
@ -292,6 +292,10 @@ struct pktgen_dev {
__u16 udp_dst_min; /* inclusive, dest UDP port */
__u16 udp_dst_max; /* exclusive, dest UDP port */
/* DSCP + ECN */
__u8 tos; /* six most significant bits of (former) IPv4 TOS are for dscp codepoint */
__u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 (see RFC 3260, sec. 4) */
/* MPLS */
unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
__be32 labels[MAX_MPLS_LABELS];
@ -671,6 +675,14 @@ static int pktgen_if_show(struct seq_file *seq, void *v)
pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi);
}
if (pkt_dev->tos) {
seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
}
if (pkt_dev->traffic_class) {
seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
}
seq_printf(seq, " Flags: ");
if (pkt_dev->flags & F_IPV6)
@ -748,12 +760,12 @@ static int pktgen_if_show(struct seq_file *seq, void *v)
}
static int hex32_arg(const char __user *user_buffer, __u32 *num)
static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, __u32 *num)
{
int i = 0;
*num = 0;
for(; i < 8; i++) {
for(; i < maxlen; i++) {
char c;
*num <<= 4;
if (get_user(c, &user_buffer[i]))
@ -848,7 +860,7 @@ static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
pkt_dev->nr_labels = 0;
do {
__u32 tmp;
len = hex32_arg(&buffer[i], &tmp);
len = hex32_arg(&buffer[i], 8, &tmp);
if (len <= 0)
return len;
pkt_dev->labels[n] = htonl(tmp);
@ -1185,11 +1197,15 @@ static ssize_t pktgen_if_write(struct file *file,
else if (strcmp(f, "!SVID_RND") == 0)
pkt_dev->flags &= ~F_SVID_RND;
else if (strcmp(f, "!IPV6") == 0)
pkt_dev->flags &= ~F_IPV6;
else {
sprintf(pg_result,
"Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
f,
"IPSRC_RND, IPDST_RND, TXSIZE_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND\n");
"IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
"MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND\n");
return count;
}
sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
@ -1615,6 +1631,38 @@ static ssize_t pktgen_if_write(struct file *file,
return count;
}
if (!strcmp(name, "tos")) {
__u32 tmp_value = 0;
len = hex32_arg(&user_buffer[i], 2, &tmp_value);
if (len < 0) {
return len;
}
i += len;
if (len == 2) {
pkt_dev->tos = tmp_value;
sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
} else {
sprintf(pg_result, "ERROR: tos must be 00-ff");
}
return count;
}
if (!strcmp(name, "traffic_class")) {
__u32 tmp_value = 0;
len = hex32_arg(&user_buffer[i], 2, &tmp_value);
if (len < 0) {
return len;
}
i += len;
if (len == 2) {
pkt_dev->traffic_class = tmp_value;
sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
} else {
sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
}
return count;
}
sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
return -EINVAL;
}
@ -2339,7 +2387,7 @@ static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
iph->ihl = 5;
iph->version = 4;
iph->ttl = 32;
iph->tos = 0;
iph->tos = pkt_dev->tos;
iph->protocol = IPPROTO_UDP; /* UDP */
iph->saddr = pkt_dev->cur_saddr;
iph->daddr = pkt_dev->cur_daddr;
@ -2680,6 +2728,11 @@ static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
*(u32 *) iph = __constant_htonl(0x60000000); /* Version + flow */
if (pkt_dev->traffic_class) {
/* Version + traffic class + flow (0) */
*(u32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
}
iph->hop_limit = 32;
iph->payload_len = htons(sizeof(struct udphdr) + datalen);