[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>
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34954ddc4f
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1ca7768c87
net/core
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@ -160,7 +160,7 @@
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#include <asm/div64.h> /* do_div */
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#include <asm/timex.h>
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#define VERSION "pktgen v2.67: Packet Generator for packet performance testing.\n"
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#define VERSION "pktgen v2.68: Packet Generator for packet performance testing.\n"
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/* #define PG_DEBUG(a) a */
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#define PG_DEBUG(a)
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@ -292,6 +292,10 @@ struct pktgen_dev {
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__u16 udp_dst_min; /* inclusive, dest UDP port */
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__u16 udp_dst_max; /* exclusive, dest UDP port */
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/* DSCP + ECN */
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__u8 tos; /* six most significant bits of (former) IPv4 TOS are for dscp codepoint */
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__u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6 (see RFC 3260, sec. 4) */
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/* MPLS */
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unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
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__be32 labels[MAX_MPLS_LABELS];
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@ -671,6 +675,14 @@ static int pktgen_if_show(struct seq_file *seq, void *v)
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pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi);
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}
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if (pkt_dev->tos) {
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seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
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}
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if (pkt_dev->traffic_class) {
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seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
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}
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seq_printf(seq, " Flags: ");
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if (pkt_dev->flags & F_IPV6)
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@ -748,12 +760,12 @@ static int pktgen_if_show(struct seq_file *seq, void *v)
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}
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static int hex32_arg(const char __user *user_buffer, __u32 *num)
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static int hex32_arg(const char __user *user_buffer, unsigned long maxlen, __u32 *num)
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{
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int i = 0;
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*num = 0;
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for(; i < 8; i++) {
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for(; i < maxlen; i++) {
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char c;
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*num <<= 4;
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if (get_user(c, &user_buffer[i]))
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@ -848,7 +860,7 @@ static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
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pkt_dev->nr_labels = 0;
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do {
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__u32 tmp;
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len = hex32_arg(&buffer[i], &tmp);
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len = hex32_arg(&buffer[i], 8, &tmp);
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if (len <= 0)
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return len;
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pkt_dev->labels[n] = htonl(tmp);
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@ -1185,11 +1197,15 @@ static ssize_t pktgen_if_write(struct file *file,
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else if (strcmp(f, "!SVID_RND") == 0)
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pkt_dev->flags &= ~F_SVID_RND;
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else if (strcmp(f, "!IPV6") == 0)
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pkt_dev->flags &= ~F_IPV6;
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else {
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sprintf(pg_result,
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"Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
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f,
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"IPSRC_RND, IPDST_RND, TXSIZE_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND\n");
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"IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
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"MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND\n");
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return count;
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}
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sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
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@ -1615,6 +1631,38 @@ static ssize_t pktgen_if_write(struct file *file,
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return count;
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}
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if (!strcmp(name, "tos")) {
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__u32 tmp_value = 0;
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len = hex32_arg(&user_buffer[i], 2, &tmp_value);
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if (len < 0) {
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return len;
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}
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i += len;
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if (len == 2) {
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pkt_dev->tos = tmp_value;
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sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
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} else {
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sprintf(pg_result, "ERROR: tos must be 00-ff");
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}
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return count;
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}
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if (!strcmp(name, "traffic_class")) {
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__u32 tmp_value = 0;
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len = hex32_arg(&user_buffer[i], 2, &tmp_value);
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if (len < 0) {
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return len;
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}
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i += len;
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if (len == 2) {
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pkt_dev->traffic_class = tmp_value;
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sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
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} else {
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sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
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}
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return count;
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}
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sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
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return -EINVAL;
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}
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@ -2339,7 +2387,7 @@ static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
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iph->ihl = 5;
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iph->version = 4;
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iph->ttl = 32;
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iph->tos = 0;
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iph->tos = pkt_dev->tos;
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iph->protocol = IPPROTO_UDP; /* UDP */
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iph->saddr = pkt_dev->cur_saddr;
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iph->daddr = pkt_dev->cur_daddr;
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@ -2680,6 +2728,11 @@ static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
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*(u32 *) iph = __constant_htonl(0x60000000); /* Version + flow */
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if (pkt_dev->traffic_class) {
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/* Version + traffic class + flow (0) */
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*(u32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
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}
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iph->hop_limit = 32;
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iph->payload_len = htons(sizeof(struct udphdr) + datalen);
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