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samples/bpf: xdpsock: Add Dest and Src MAC setting for Tx-only operation

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To set Dest MAC address (-G|--tx-dmac) only:
 $ xdpsock -i eth0 -t -N -z -G aa:bb:cc:dd:ee:ff

To set Source MAC address (-H|--tx-smac) only:
 $ xdpsock -i eth0 -t -N -z -H 11:22:33:44:55:66

To set both Dest and Source MAC address:
 $ xdpsock -i eth0 -t -N -z -G aa:bb:cc:dd:ee:ff \
   -H 11:22:33:44:55:66

The default Dest and Source MAC address remain the same as before.

Signed-off-by: Ong Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Link: https://lore.kernel.org/bpf/20211230035447.523177-3-boon.leong.ong@intel.com
This commit is contained in:
Ong Boon Leong 2021-12-30 11:54:42 +08:00 committed by Alexei Starovoitov
parent 2741a0493c
commit 6440a6c23f
1 changed files with 30 additions and 5 deletions
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35
samples/bpf/xdpsock_user.c
View File

@ -14,6 +14,7 @@
#include <arpa/inet.h>
#include <locale.h>
#include <net/ethernet.h>
#include <netinet/ether.h>
#include <net/if.h>
#include <poll.h>
#include <pthread.h>
@ -90,6 +91,10 @@ static u32 opt_pkt_fill_pattern = 0x12345678;
static bool opt_vlan_tag;
static u16 opt_pkt_vlan_id = VLAN_VID__DEFAULT;
static u16 opt_pkt_vlan_pri = VLAN_PRI__DEFAULT;
static struct ether_addr opt_txdmac = {{ 0x3c, 0xfd, 0xfe,
0x9e, 0x7f, 0x71 }};
static struct ether_addr opt_txsmac = {{ 0xec, 0xb1, 0xd7,
0x98, 0x3a, 0xc0 }};
static bool opt_extra_stats;
static bool opt_quiet;
static bool opt_app_stats;
@ -785,8 +790,8 @@ static void gen_eth_hdr_data(void)
sizeof(struct vlan_ethhdr));
/* ethernet & VLAN header */
memcpy(veth_hdr->h_dest, "\x3c\xfd\xfe\x9e\x7f\x71", ETH_ALEN);
memcpy(veth_hdr->h_source, "\xec\xb1\xd7\x98\x3a\xc0", ETH_ALEN);
memcpy(veth_hdr->h_dest, &opt_txdmac, ETH_ALEN);
memcpy(veth_hdr->h_source, &opt_txsmac, ETH_ALEN);
veth_hdr->h_vlan_proto = htons(ETH_P_8021Q);
vlan_tci = opt_pkt_vlan_id & VLAN_VID_MASK;
vlan_tci |= (opt_pkt_vlan_pri << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
@ -802,8 +807,8 @@ static void gen_eth_hdr_data(void)
sizeof(struct ethhdr));
/* ethernet header */
memcpy(eth_hdr->h_dest, "\x3c\xfd\xfe\x9e\x7f\x71", ETH_ALEN);
memcpy(eth_hdr->h_source, "\xec\xb1\xd7\x98\x3a\xc0", ETH_ALEN);
memcpy(eth_hdr->h_dest, &opt_txdmac, ETH_ALEN);
memcpy(eth_hdr->h_source, &opt_txsmac, ETH_ALEN);
eth_hdr->h_proto = htons(ETH_P_IP);
}
@ -967,6 +972,8 @@ static struct option long_options[] = {
{"tx-vlan", no_argument, 0, 'V'},
{"tx-vlan-id", required_argument, 0, 'J'},
{"tx-vlan-pri", required_argument, 0, 'K'},
{"tx-dmac", required_argument, 0, 'G'},
{"tx-smac", required_argument, 0, 'H'},
{"extra-stats", no_argument, 0, 'x'},
{"quiet", no_argument, 0, 'Q'},
{"app-stats", no_argument, 0, 'a'},
@ -1010,6 +1017,8 @@ static void usage(const char *prog)
" -V, --tx-vlan Send VLAN tagged packets (For -t|--txonly)\n"
" -J, --tx-vlan-id=n Tx VLAN ID [1-4095]. Default: %d (For -V|--tx-vlan)\n"
" -K, --tx-vlan-pri=n Tx VLAN Priority [0-7]. Default: %d (For -V|--tx-vlan)\n"
" -G, --tx-dmac=<MAC> Dest MAC addr of TX frame in aa:bb:cc:dd:ee:ff format (For -V|--tx-vlan)\n"
" -H, --tx-smac=<MAC> Src MAC addr of TX frame in aa:bb:cc:dd:ee:ff format (For -V|--tx-vlan)\n"
" -x, --extra-stats Display extra statistics.\n"
" -Q, --quiet Do not display any stats.\n"
" -a, --app-stats Display application (syscall) statistics.\n"
@ -1032,7 +1041,7 @@ static void parse_command_line(int argc, char **argv)
opterr = 0;
for (;;) {
c = getopt_long(argc, argv, "Frtli:q:pSNn:czf:muMd:b:C:s:P:VJ:K:xQaI:BR",
c = getopt_long(argc, argv, "Frtli:q:pSNn:czf:muMd:b:C:s:P:VJ:K:G:H:xQaI:BR",
long_options, &option_index);
if (c == -1)
break;
@ -1122,6 +1131,22 @@ static void parse_command_line(int argc, char **argv)
case 'K':
opt_pkt_vlan_pri = atoi(optarg);
break;
case 'G':
if (!ether_aton_r(optarg,
(struct ether_addr *)&opt_txdmac)) {
fprintf(stderr, "Invalid dmac address:%s\n",
optarg);
usage(basename(argv[0]));
}
break;
case 'H':
if (!ether_aton_r(optarg,
(struct ether_addr *)&opt_txsmac)) {
fprintf(stderr, "Invalid smac address:%s\n",
optarg);
usage(basename(argv[0]));
}
break;
case 'x':
opt_extra_stats = 1;
break;